Abstract: A battery management system, comprising a bank of serially connected battery cells having a lower most cell connected to ground and an uppermost cell connected to one port of a load, the other port of which being connected to ground; circuitry for sampling the output voltage of a selected battery cell; a voltage to current converter for receiving the sampled battery cell output voltage, which consists of a current source that outputs current being proportional to the sampled output voltage a predetermined resistor, connected between the current source output and ground, into which the output current of the current source is fed; a control circuit, adapted to measure the voltage generated across the predetermined resistor with respect to ground; determine whether or not the selected battery cell is fully charged according to the difference between the measured voltage and a predetermined threshold voltage; repeat the process for additional battery cells of the bank.

Abstract: A method is provided for operating a lithium ion battery having at least one lithium ion cell and a heating device, the method includes a step of operating the lithium ion battery in a temperature range between 5 and 90° C. The heating device is designed to operate the lithium ion battery in a temperature range between 5 and 90° C. The lithium ion cell includes an anode, a cathode, a separator, a current collector and an electrolyte. The electrolyte can contain LiBOB as the conducting salt and at least one solvent selected from propylene carbonate and ethylene carbonate; or having LiFSI and/or LiDFOB as the conducting salt and at least one solvent selected from glycol ether and/or DMC; or having LiFSI and/or LiTFSI and/or LiDFOB and/or LiTDI as the conducting salt and at least one solvent selected from imidazolium compounds, pyrrolidinium compounds and piperidinium compounds.

Abstract: A cell temperature measurement system for a battery includes a heat spreader and a temperature sensor. The heat spreader is configured to thermally conduct energy through a substrate from a cell contact to a sensor contact. The temperature sensor is configured to generate a measurement reflective of a cell or another component temperature of the battery. The temperature sensor may generate the temperature measurement according to readings taken with a probe positioned proximate the sensor contact.

Abstract: An improved portable media device and methods for operating a media device are disclosed. According to one aspect, the portable media device can also function as a solid-state drive for data storage. The form factor of the portable media device can be hand-held or smaller, such that it is highly portable. The portable media device can use one or more status indicators. The portable media device can also include a peripheral bus connector, a rechargeable battery, and one or more input devices. According to another aspect, the portable media device has the capability to store media device status information in persistent memory before powering down. Thereafter, when the portable media device is again powered up, the stored media player status information can be retrieved and utilized. According to still another aspect, the portable media device can form and/or traverse a media asset playlist in an efficient manner.

Abstract: A vehicle includes a battery and a controller. The controller is programmed to executed a parameter estimation strategy for the battery during time intervals when the current flowing through the battery is sufficiently dynamic. During periods of generally constant current, the parameters are derived from the last valid parameters from the parameter estimation strategy. During periods of generally constant current in which a battery temperature and/or a state of charge of the battery changes by a predetermined amount, the parameters are derived from historical parameter values.

Abstract: An electrical device having a plurality of parallel-connected built-in rechargeable batteries includes a power supply terminal and a charging circuit. The power supply terminal receives electrical power supplied from the outside of the electrical device. The charging circuit executes charge control so as to charge the plurality of rechargeable batteries using the electrical power supplied from the outside. During the execution of the charge control, the charging circuit interrupts charging of any one of the plurality of rechargeable batteries in accordance with a magnitude of a charging current flowing to each of the plurality of rechargeable batteries.

Abstract: A method of controlling scheduled charging is provided. The method includes calculating a primary scheduled charge time based on an expected charge time consumption and an expected primary scheduled charge start time and calculating an expected temperature for the primary scheduled charge time based on the primary scheduled charge time and charger temperature information or climate information. A corrected expected charge time consumption is calculated based on the calculated expected temperature and a secondary scheduled charge time is calculated based on the corrected expected charge time consumption. A vehicle battery is charged based on the secondary scheduled charge time.

Abstract: A computer-implemented method and a temperature estimating system for estimating a temperature of an electrochemical battery, including: providing a series of electrical impedance measurements of an electrochemical battery, each electrical impedance measurement being measured at a respective measurement frequency, the series being ordered according to the respective measurement frequencies; and determining a temperature of the electrochemical battery using artificial neural network means configured to receive as inputs a series of electrical impedance values, wherein a series of electrical impedance values is provided to the artificial neural network means, the series of electrical impedance values corresponding to the provided series of electrical impedance measurements, wherein the artificial neural network means receives and processes the provided series of electrical impedance values to generate therefrom an output signal representing a temperature associated with the electrochemical battery.

Abstract: Vehicles can employ onboard telematic monitoring devices to collect vehicle and operation data, such as for improved vehicle fleet management. Such telematic monitoring devices are dependent on power from a vehicle, such that data collection and communication can be interrupted if a telematic monitoring device is disconnected or has a poor connection. The present disclosure relates to battery devices, which provide power to telematic devices as needed in order to maintain data collection and communication, or other more limited functionality. The present disclosure also relates to systems including battery devices, and methods for operating battery devices.

Abstract: The described technology relates to a battery pack and a data transmission method for the battery pack. In one embodiment, the battery pack includes a battery comprising at least one battery cell and a controller configured to check a state of the battery and generate a battery state signal corresponding to the state of the battery. The battery pack also includes a switch circuit configured to operate based on the battery state signal and a resistor circuit configured to be electrically connected to a reference node through the switch circuit. The switch circuit is configured to make or break electrical connection between the resistor circuit and the reference node based on the battery state signal.

Abstract: Object detection for wireless power transmitters and related systems, methods, and devices are disclosed. A controller for a wireless power transmitter is configured to receive a measurement voltage potential responsive to a tank circuit signal at a tank circuit, provide an alternating current (AC) signal to each of the plurality of transmit coils one at a time, and determine at least one of a resonant frequency and a quality factor (Q-factor) of the tank circuit responsive to each selected transmit coil of the plurality of transmit coils. The controller is also configured to select a transmit coil to use to transmit wireless power to a receive coil of a wireless power receiver responsive to the determined at least one of the resonant frequency and the Q-factor for each transmit coil of the plurality of transmit coils.

Abstract: A battery charging method includes detecting a battery temperature and a battery power, determining whether the battery temperature satisfies a preset temperature condition for switching charging processes, performing a first charging process by alternating pulsed charging and discharging when the battery temperature is less than or equal to a first preset temperature value, performing a second charging process including a charge current dynamically adjusted according to the battery temperature and the battery power when the battery temperature is greater than the first preset temperature value and less than a second preset temperature value, and determining whether the battery power is less than a first preset power value when the battery temperature is equal to or greater than the second preset temperature value and less than a third preset temperature value, and performing a third charging process when the battery power is less than the first preset power value.

Abstract: A system is provided that evaluates an energy state. The system comprises a sensor, bins, and a processor. The sensor is communicatively coupled to at least one cell that is powering an electric load. The sensor is operative to collect samples, each representing a measure of current discharged from the at least one cell during a discharge event. The bins are stored in a memory, and are accessible by the processor. The processor is programmed to sort the collected samples into bins based upon sample value. The processor is also programmed to create a use estimate based upon samples sorted into their corresponding bins. Yet further, the processor is programmed to determine a fractional depletion for each bin, each fractional depletion being a quotient that is computed by dividing an expected value for that bin by the use estimate for that bin.

Abstract: A biological information measurement device operates using a battery as a power source, and enables the continuous measurement of biological information. The biological information measurement device is provided with: a battery charge level detection unit for detecting the charge level of the battery; a measurement control unit that ends measurement of biological information when the charge level of the battery falls below a threshold value during biological information measurement; and an information output unit that, when biological information measurement has been ended by the measurement control unit, outputs, to a display unit, information indicating the length of time over which biological information was measured.

Abstract: An overhead battery charger is disclosed. The overhead battery charger includes a source of electric power, for example an electrical outlet, as well as a power cord connected to the source of electric power. At least one battery connection device, such as alligator clamps, is attached to the power cord, and a controller adapted to adjust voltage, current, or both, is available at the battery connection device. In addition, a remote device, such as a smart phone, tablet, or computer, runs an app and sends signals to direct the adjustments made by the controller.

Abstract: A battery pack includes a battery section including one or a plurality of battery cells, a microcomputer configured to communicate with outside, a power supply terminal connected to the battery section, a communication terminal of the battery pack connected to a communication terminal of the microcomputer, a high voltage detector configured to detect high voltage by comparing voltage applied to the communication terminal of the battery pack with a preset threshold value, and a switch configured to disconnect the communication terminal of the microcomputer from the communication terminal of the battery pack in response to an output from the high voltage detector.

Abstract: A method of charging a cell of a battery includes the steps of: applying a test current to an input terminal of the battery; measuring a voltage output, wherein the voltage output is comprised of a voltage of the cell and a voltage drop, induced by the test current, across an internal impedance of the battery; and applying a charging current to the input terminal of the battery if the measured voltage output is higher than a predetermined voltage, wherein the charging current is greater than the test current.

Abstract: Problem: To accurately detect the state of charge of a secondary battery regardless of the state of the same. Resolution Means: A secondary battery state detection device 1 for detecting the state of a secondary battery 14 has a measurement unit (voltage sensor 11) for measuring or estimating the open-circuit voltage of the secondary battery, a determination unit (control unit 10) for determining a state of charge by applying the open-circuit voltage measured or estimated by the measurement unit to a correlation equation expressing the relationship between the open-circuit voltage and state of charge, a calculation unit (control unit 10) for calculating a state of charge on the basis of the internal resistance of the secondary battery, and a correction unit (control unit 10) for correcting the correlation equation of the determination unit if the values of the state of charge determined by the determination unit and the state of charge calculated by the calculation unit differ.

Abstract: Interaction based charging control is described. In an embodiment, a device is described, comprising: an interface configured to receive a charging power from another device; a sensor configured to detect interaction of the device; a charging controller configured to reduce the charging power in response to the detected interaction; in response to the reduced charging power, a processor configured to allow more processing power for the device. In other embodiments, a device comprising a sensor configured to detect a temperature of the device, and a method are discussed.

Abstract: An adapter and a method for charging control are disclosed. The adapter includes a power conversion unit, a voltage feedback unit, a current feedback unit, and a power adjustment unit. The power adjustment unit includes an input end coupled to an output end of the voltage feedback unit to an output end of the current feedback unit, and an output end coupled to the power conversion unit. The power adjustment unit is used to receive the voltage feedback signal and the current feedback signal, and stabilize the output voltage and output current of the adapter when the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage or the current feedback signal indicates the output current of the adapter has reached the target current.

Abstract: An adapter and a charging control method are provided, the adapter includes: a power conversion unit, a voltage feedback unit, a current feedback unit, and a power adjusting unit. An input end of the power adjusting unit is coupled to an output end of the voltage feedback unit and an output end of the current feedback unit respectively, and an output end of the power adjusting unit is coupled to the power conversion unit. The power adjusting unit is configured to receive a voltage feedback signal and a current feedback signal, and to stabilize the output voltage and the output current of the adapter when the voltage feedback signal indicates that the output voltage of the adapter reaches a predetermined target voltage or when the current feedback signal indicates that the output current of the adapter reaches a predetermined target current.

Abstract: A method can be used for charging a battery of a vehicle. The method includes performing a first charging process in which the battery is charged with a maximum amount of charges corresponding to a current temperature of the battery, the battery being heated while performing the first charging process. The method also includes performing a heating process in which the battery is heated without charging of the battery, and performing a second charging process in which, when the maximum amount of charges of the battery increases by heating of the battery, the battery is further charged with the increased maximum amount of charges.

Abstract: There are disclosed herein various implementations of a connect/disconnect module for use with a battery pack. The connect/disconnect module includes a charge/discharge current path including multiple transistors having a first safe operating area (SOA), and a pre-charge current path coupled across the charge/discharge current path. The pre-charge current path includes multiple transistors having a second SOA that is significantly greater than the first SOA.

Abstract: Charging of an electrical storage device is completed by operation-starting time while increasing a percentage of a charging time of the electrical storage device in a first time period as compared to a percentage of the charging time in a second time period when the first time period and the second time period are included within a period from when a user sets the operation-starting time to the operation-starting time. A temperature adjustment device is operated such that a temperature of the electrical storage device at the operation-starting time falls within a target temperature range while increasing a percentage of an operating time of the temperature adjustment device in the first time period as compared to a percentage of the operating time in the second time period when the first time period and the second time period are included within the period from when the user sets the operation-starting time to the operation-starting time.

Abstract: A ground-fault determination apparatus, which is for use in a vehicle power supply system including a DC power source and a DC supply circuit, includes an acquisition unit that applies an AC signal to the DC supply circuit through a series connection of a resistor and a capacitor to acquire a peak value of the AC signal divided by a resistance of the resistor and an insulation resistance of the DC supply circuit, a ground-fault determination unit that determines presence of a ground-fault based on a comparison between a determination threshold and the peak value, an estimation unit that estimates at least one of a maximum output voltage of the DC supply circuit and a common capacitance between the DC supply circuit and a vehicle body, and a setting unit that sets the determination threshold based on at least one of the maximum output voltage and the common capacitance.

Abstract: A battery management system for a motor vehicle is disclosed. The system includes at least one battery having multiple battery cells, an automotive electronic control unit including a device for sensing battery quantities, where the battery quantities are the battery terminal current, the battery terminal voltage and a measured or estimated battery or battery box temperature, the battery terminal current, the battery terminal voltage, the measured or estimated battery or battery box temperature, and an automotive alternator supplying a regulation voltage, where the automotive electronic control unit is adapted to drive the battery through a charging cycle, in which a certain charge voltage and/or a certain charge current is supplied to the battery to charge the battery, and the automotive electronic control unit is adapted to control the regulation voltage based upon the sensed battery quantities to supply the certain charge voltage and/or the certain charge current to the battery.

Abstract: A power source apparatus mounted to a vehicle is equipped with a lead-acid battery and a lithium battery. An open circuit voltage and an internal resistance of each of the batteries are determined to satisfy the following conditions (a1), (a2), and (a3): (a1) In the use range of SOC of the lead-acid battery and the use range of SOC of the lithium battery, there is an equal voltage point Vds at which the open circuit voltage V0 (Pb) of the lead-acid battery becomes equal to the open circuit voltage V0 (Li) of the lithium battery; (a2) The relationship of V0 (Li)>V0 (Pb) is satisfied in the upper limit side of the use range of SOC of the battery; and (a3) A terminal voltage Vc (Li) of the lithium battery is not more than a set voltage Vreg of a regulator when a maximum current flows in the lithium battery.

Abstract: A system and method for early identification of an impending fast-charge or fast-charge opportunity and use of that information to prepare the battery cells for the fast-charge.

Abstract: An electronic device including a control unit, an embedded controller and a battery module is provided. During a booting procedure of the electronic device, the embedded controller reads a reported battery capacity and a battery temperature of the battery module. The embedded controller determines whether the reported battery capacity is lower than a minimum capacity, and further determines whether the battery temperature is lower than a minimum temperature when the reported battery capacity is lower than the minimum capacity. When the reported capacity is lower than the minimum capacity and the battery temperature is also lower than the minimum temperature, the embedded controller generates a fake battery capacity, according to which an operating system of the electronic device performs various operations. In this application, the battery module of the electronic device remains working even when the electronic device is in a low-temperature and low-battery activation environment.

Abstract: A device for monitoring and protecting electrical equipment, placed in series on a power supply line between an electrical power source and the equipment, includes: at least one voltage regulator for regulating a power supply voltage of the equipment, at least one current limiter, coupled to the voltage regulator to reduce the power supply voltage of the equipment if a power supply current absorbed by the equipment exceeds an upper operating value, at least one crowbar short-circuit device, adapted to be activated when the input voltage exceeds a safety limit value, higher than the upper operating value, and to cause a fuse placed in series between the power source and the equipment, to blow, and calculating and storage elements adapted to generate a clock and to log a date of occurrence of a fault and the operating parameters of the power supply for the equipment in a non-volatile memory.

Abstract: Certain embodiments of the present invention provide a battery heating circuit, wherein: the battery comprises a first battery and a second battery; the heating circuit comprises a first switch unit, a second switch unit, a damping component R1, a damping component R2, a current storage component L3, a current storage component L4, a switching control module and an energy storage component V1; the first battery, the damping component R1, the current storage component L3, the energy storage component V1 and the first switch unit are connected in series to constitute a first charging/discharging circuit; the second battery, the damping component R2, the current storage component L4, the energy storage component V1 and the second switch unit are connected in series to constitute a second charging/discharging circuit.

Abstract: Temperature characteristics of battery cells are detected. In accordance with one or more embodiments, an intercept frequency is detected for each battery cell, at which frequency an imaginary part of a plot of impedance values of the battery cell exhibits a zero crossing. The impedance values correspond to current injected into the cell. A temperature of the cell is determined based upon the detected intercept frequency for the cell and stored data that models operation of the cell. Various approaches are implemented with different types of circuits coupled to detect the impedance values of the respective cells.

Abstract: The present invention relates to a battery management apparatus of a high voltage battery for a hybrid vehicle, in more detail, a battery management apparatus of a high voltage battery for a hybrid vehicle which includes: a plurality of battery packs including a plurality of unit cells; slave battery management modules measuring and monitoring temperature and voltage of the unit cells in the battery packs; temperature/voltage measurement wires connecting the unit cells with adjacent unit cells for the slave battery management modules to measure temperature and voltage between the unit cells and the adjacent unit cells; a master battery management module connected with the slave battery management modules; and communication wires connecting the modules.

Abstract: A power source is electrically connected with a battery and an electrical load. The power source has an output voltage and provides current for the battery and electrical load. A charging voltage for the battery is determined based on temperature of the battery. An offset voltage is determined based on the provided current to the battery. The output voltage is determined based on the charging and offset voltages.

Abstract: The present application provides systems and methods for battery temperature detection and parasitic resistance compensation. Compensation circuitry is provided to generate a compensation current, proportional to a battery charging or discharging current, to compensate for the parasitic resistance associated with the line connection between a charger/monitor and a battery pack. The compensation current operates to adjust a reference current supplied to a temperature sensor, to enable accurate temperature measurement of the battery pack while reducing or eliminating influence from the parasitic resistance. The compensation circuitry can be utilized in a battery charger topology to enhance battery charging control and/or a battery monitoring topology to enhance battery discharge control.

Abstract: A secondary battery power control method controls power discharged from a secondary battery included in an interconnected system that supplies power to a power system, the interconnected system including a power generator that changes in output power, and an electric power storage-compensation device that includes a secondary battery, and a bidirectional converter that controls charging/discharging of the secondary battery, and compensates for a change in output power of the power generator. A temperature detection section that detects the temperature of the secondary battery is annexed to the secondary battery, and the maximum discharge power of the secondary battery is limited using the bidirectional converter when the temperature of the secondary battery detected by the temperature detection section has exceeded a preset temperature.

Abstract: A method and system for determining the temperature of cells in a battery pack, without using temperature sensors, by measuring the impedance of the cells and using the impedance to determine the temperature. An AC voltage signal is applied to the battery pack, and a time sample of voltage and current data is obtained. The voltage and current data is narrowed down to a simultaneous time window of interest, and a fast fourier transformation is performed on the windowed voltage and current data to identify voltage and current magnitudes at one or more specific frequencies. The voltage and current magnitudes are used to determine the impedance at the one or more frequencies. Finally, the impedance is used to determine the temperature of the cell or cells using a look-up table, where the impedance, the frequency, and a state of charge are used as input parameters for the look-up.

Abstract: Since in existent charge-discharge control the battery direct current resistance of a lithium ion battery increases at a low temperature or in a low SOC, the battery voltage may possibly exceed greatly the maximum allowable voltage instantaneously due to over-voltage during charging or may possibly decrease greatly to less than the minimum allowable voltage during discharging. If the lithium ion battery continuously lies in such a state the battery performance is degraded abruptly. The battery resistance of a lithium ion battery module is estimated in accordance with SOC and temperature of the lithium ion battery module, and current to charge is set properly based on the estimated battery resistance.

Abstract: The method for charging or discharging a battery comprises measurement of the voltage at the terminals of the battery and comparison of the measured voltage with an end of charging or discharging voltage threshold. The method also comprises measurement of a temperature representative of the temperature of the battery and measurement of the current flowing in the battery to form a pair of measurements. The voltage threshold is then determined according to the pair of measurements. Charging or discharging of the battery is stopped when the voltage threshold is reached.

Abstract: A charging device for a storage battery includes: a charging power source for supplying electric power to a storage battery; a charging electric power detecting device adapted to detect electric power charged to the storage battery; a full charge determining device adapted to make a full charge determination based on a detected value of the charging electric power detecting device; and a charging controlling device adapted to conduct charging control by charging the storage battery until the full charge determination is made, stopping charging when the full charge determination is made, restarting charging after a prescribed time period elapses from the stop of charging, and continuing charging until the full charge determination is made again.

Abstract: The present invention provides a small fuel cell system including a secondary battery, in which deterioration in the secondary battery is suppressed regardless of a temperature condition. A control unit adjusts the supply amount of a liquid fluid of a fuel pump so that charging current I2 to a secondary battery becomes smaller than a predetermined maximum charging current value Imax. Consequently, for example, even in the case of using a small secondary battery, the charging current I2 is limited to be smaller than a predetermined upper limit value (maximum charging current value Imax). In addition, a temperature detecting unit detects temperature T1 of the secondary battery and the control unit controls the maximum charging current value Imax in accordance with the detected temperature T1 of the secondary battery. In such a manner, the operation of limiting the charging current I2 in accordance with the temperature T1 of the secondary battery at that time is performed.

Abstract: A battery control system includes a lithium ion secondary battery and a control device and further includes a voltage storage unit, a resistance storage unit, a current storage unit, a difference obtaining unit for obtaining a difference resistance ?R(Tja) between a normal internal resistance Rj(Tja) at a predetermined battery temperature Tja in a normal temperature range ATj and an initial internal resistance R0(Tja) at the predetermined battery temperature, and a maximum voltage calculation unit for giving a maximum inter-terminal voltage Vm(T), when at least a battery temperature T is within a low-temperature range ATl, as a value obtained by adding a product of the difference resistance ?R(Tja) and the allowable charging current Im(T) to the initial maximum inter-terminal voltage Vm0(T).

Abstract: In a memory, the surface temperature and the internal resistance of an assembled battery detected under the condition where a difference between the surface and the internal temperature is within a predetermined value are stored, and an internal temperature diagnosis unit that diagnoses whether or not the internal temperature estimated by an internal temperature estimation unit is correct, detects the internal resistance with an internal resistance calculation unit when the internal temperature estimation unit estimates the internal temperature, searches for an internal resistance corresponding to the surface temperature equal to the estimated internal temperature value from among the stored internal resistances, and diagnoses the estimated internal temperature value based upon the result of comparison of a search result of the internal resistance and the internal resistance detected during internal temperature estimation.

Abstract: A system and method for controlling a state-of-charge (SOC) of a vehicle battery, such as a high-voltage battery used by a hybrid electric vehicle (HEV) for vehicle propulsion, so that the SOC is maintained within a desired SOC range that is temperature-dependent. In an exemplary embodiment, the system and method use a battery temperature prediction to determine a desired SOC range, and then control the amount of charge on the vehicle battery such that the SOC is maintained within the desired SOC range. As the battery temperature prediction goes lower (i.e., as it gets colder), the desired SOC range may need to be adjusted or shifted upwards in order to account for increased internal battery resistance and to ensure that the vehicle battery has enough power to start the vehicle. Similarly, as the battery temperature prediction goes higher (i.e., as it gets warmer), the desired SOC range may need to be adjusted or shifted downwards in order to reduce degradation effects and improve battery.

Abstract: A load management system provides an interface between a power input and several switched power outputs and un-switched power outputs. A controller groups the switched power outputs into one or more load groups based on a switched current limit determined for the system and the measured currents of the electrical loads. The load groups are defined so that the sum of electrical load currents in each load group does not exceed the switched current limit. The controller also activates one or more switches to apply electrical power to the load groups according to a power sequence. A method for distributing electrical power to electrical loads using load groups is also provided.

Abstract: Described are systems and methods for accurately characterizing thermodynamic and materials properties of electrodes and battery systems and for characterizing the state of health of electrodes and battery systems. Measurement of physical attributes of electrodes and batteries corresponding to thermodynamically stabilized electrode conditions permit determination of thermodynamic parameters, including state functions such as the Gibbs free energy, enthalpy and entropy of electrode/electrochemical cell reactions, that enable prediction of important performance attributes of electrode materials and battery systems, such as energy, power density, current rate, cycle life and state of health. Also provided are systems and methods for charging a battery according to its state of health.

Abstract: The invention is related to a method and system for temperature regulation of a power switch during charging of a portable device. The method includes the steps of establishing a connection between the portable device and a charging circuit, monitoring a charging current supplied from the charging circuit to the portable device, monitoring a temperature of the power switch, while the portable device is being charged, comparing the monitored temperature with a predefined threshold temperature, and restricting the charging current, based on the comparison.

Abstract: A battery temperature monitoring circuit, which has a cold comparator and a hot comparator, achieves high accuracy in a small cell size by utilizing a cold current optimized for the cold comparator and a cold reference voltage, and a hot current optimized for the hot comparator and a hot reference voltage, along with switching circuitry that provides the cold current to the cold comparator as the battery temperature approaches the cold trip temperature, and the hot current to the hot comparator as the battery temperature approaches the hot trip temperature.

Abstract: A charging control circuit for a secondary battery includes a temperature detection terminal for detecting the temperature of a secondary battery from an input detected voltage; a temperature comparison part having four threshold voltages corresponding to four reference temperatures, the temperature comparison part being configured to compare the four threshold voltages with the detected voltage input to the temperature detection terminal and to output a temperature range signal indicating the temperature range of the detected voltage; and a control part configured to control a charging current and/or a charging voltage based on the temperature range signal output from the temperature comparison part.

Abstract: The disclosed embodiments provide a system that manages use of a battery corresponding to a high-voltage lithium-polymer battery in a portable electronic device. During operation, the system monitors a cycle number of the battery during use of the battery with the portable electronic device, wherein the cycle number corresponds to a number of charge-discharge cycles of the battery. If the cycle number exceeds one or more cycle number thresholds, the system modifies a charging technique for the battery to manage swelling in the battery and use of the battery with the portable electronic device.