Abstract: A method to monitor the current of a handheld power tool (3) operated by a battery (2), by at least one counter (5), includes the following steps: measuring (S1) the electric current (I) drawn from the battery during the operation of the electric tool; incrementing (S2) a reading (Z, Z1, Z2) of the counter (5) by a certain increment (IN) whenever the measured current (I) is higher than a specified upper limit value (G1, G2) during a given counting interval; decrementing (S3) the reading of the counter by a certain decrement (DE) whenever the measured current is lower than the specified upper limit value during the given counting interval; and switching off (S4) the electric tool when the reading (Z, Z1, Z2) of the counter is higher than a specified limit value (T1, T2) for the counter.

Abstract: A battery includes a battery monitoring system for performing a battery self test. The battery monitoring system is integrated into the battery and configured to monitor a first health of the battery. The battery monitoring system is configured to receive an input signal from a wired interface or a wireless interface. The input signal is configured to instruct the battery monitoring system to provide feedback regarding the first health of the battery and/or a second health of the battery monitoring system. The wired interface consists of a positive terminal and a negative terminal of the battery.

Abstract: A control device that controls discharge of a nonaqueous secondary battery in order that discharge electric power of the nonaqueous secondary battery does not exceed an upper limit value includes a current sensor and a controller. The controller calculates an evaluation value for evaluating a first deterioration component based on a discharge state detected by using the current sensor. The first deterioration component is a component that reduces output performance of the nonaqueous secondary battery due to an imbalance of ion concentrations in an electrolytic solution caused by discharging the nonaqueous secondary battery. The controller integrates a value obtained by subtracting a correction coefficient from a first integrated value obtained by integrating the evaluation values in past, which exceed a target value, and the evaluation value at present, which exceeds the target value, to calculate a second integrated value.

Abstract: An intrinsic safety approach is provided for a battery powered communication device. Sparking is prevented at radio contacts during attachment and removal of a battery (104, 204, 304, 404) from a radio (102, 202, 302, 402) through the use of switches (112, 212, 312, 412/424) to isolate the radio capacitors from the radio contacts and/or dissipate energy from the radio capacitor through a discharge resistor (214, 314, 414).

Abstract: A battery pack for an electrically powered tool includes: one or plural secondary batteries connected in series and/or in parallel; a current detection resistor in a current path through which a charge/discharge current flows into each secondary battery; an N-channel charge control FET and an N-channel discharge control FET in the current path so as to control the charge/discharge current; and a controller detecting the charge/discharge current flowing in the current detection resistor and controlling the charge and discharge control FETs based on the detection result. A threshold value indicating an overcurrent detection current with respect to the charge/discharge current is set in advance, and the controller compares the charge/discharge current detected by the current detection resistor with the threshold value, and when the detected charge/discharge current is the threshold value or more, determines that an overcurrent state is detected and turns off the charge and discharge control FETs.

Abstract: In a method for testing the charging and discharging reliability of a rechargeable battery, a test device measures the battery to obtain first terminal voltages and first electric currents when the battery is charged by a power supply. After the battery is discharged, the test device measures the battery to obtain second terminal voltages and second electronic currents. Based on the first terminal voltages and the first electric currents, a first lifecycle curve can be created. Based on the second terminal voltages and the second electric currents, a second lifecycle curve is created. The method compares the first lifecycle curve with a charging lifecycle curve, compares the second lifecycle curve with a discharging lifecycle curve, and generates a lifecycle estimation report of the rechargeable battery according to the comparison results.

Abstract: A battery management system of a vehicle utilizing electrical energy and a driving method thereof is provided. The battery management system includes a sensing unit and a main control unit (MCU). The sensing unit detects voltage of a battery cell. MCU determines an operation state of a vehicle, and generates a sampling signal depending on the operation state of the vehicle. The sampling control signal transmits to the sensing unit, and controls the detection of the voltage of the battery cell. The operation state of the vehicle includes a running state and a stopping state.

Abstract: A temperature control system for a battery in an energy storage system is disclosed. In one aspect, the temperature control system includes a circuit configured to determine that the temperature of the battery has been maintained below a normal operation temperature for a predetermined duration. The circuit is further configured to alternatingly repeat charging and discharging operations using a winding in a primary side of an inverter to generate reactive current to flow in opposite directions through the battery until the temperature of the battery is restored to the normal operation temperature.

Abstract: There is a request for charging and discharging of a lithium-ion battery with as less degradation as possible. In an operation using only binary values as in conventional technology, however, in a charged state in which the battery is used, there is a high possibility that the battery is used toward accelerating the degradation thereof. In a power distribution device for distributing power between a plurality of batteries and a plurality of customers, when distributing the power of the batteries to the loads of the customers, by being based at least on the degradation information of the batteries, the state of charge, and the temperature data of the batteries, a battery discharging function is achieved that makes the degradation of the batteries minimum.

Abstract: A method and apparatus for providing portable ground power for aircraft. A ground power unit includes a lithium ion cell battery assembly and a standard three-pin aircraft ground power connector integrated into a single unit and packaged inside a ruggedized plastic housing with a carry handle, thereby eliminating the heavy and bulky power cables between the battery and connector. A battery management unit sets charge/discharge limits and provides monitoring of state of charge, health, and function. A charging connector and charging circuitry with user-selectable regulated charging limits allows simultaneous charging and discharging operations and connection into aircraft auxiliary circuits. A ganging station is provided to electrically combine the outputs of several ground power units in parallel for starting larger aircraft.

Abstract: A ground fault detection circuit according to the present invention is a ground fault detection circuit that detects the occurrence of a ground fault of a battery that is insulated, and that includes: an AC signal generation section that generates an AC signal; a first capacitive element that couples the AC signal generated by the AC signal generation section to the battery; a voltage division section that voltage divides the AC signal that is coupled to the battery by the first capacitive element; a ground fault detection unit that detects a ground fault of the battery based on an AC component of an input signal; and a second capacitive element that couples the AC signal that has been voltage divided by the voltage division section to the ground fault detection unit as the input signal.

Abstract: According to one embodiment, a power supply apparatus includes a battery assembly, a fuse element, a switch unit, and a control unit. The fuse element is connected between the battery assembly and a load unit driven by being supplied with power from the battery assembly. The switch unit is connected in parallel to the load unit. The control unit causes, when an over voltage of at least one of the battery assembly and the load unit is detected, the switch unit to be in an ON state, provides an over current to flow from the battery assembly to the fuse element, and fusing the fuse element.

Abstract: Systems and methods for estimating the relative capacity of individual battery subdivisions in a battery system are presented. In some embodiments, a system may include calculation system configured to analyze the electrical parameters to generate derivative values of the parameters over a period of time. The calculation system may further calculate summation values associated with individual battery subdivisions based upon the derivate values. A battery control system may utilize the summation values to generate one or more commands configured to control an aspect of an operation of the battery pack based on using the summation values. The summation values associated with battery subdivisions may be used to determine a relative capacity for storing electrical energy, according to some embodiments. The determination of relative capacity may be used by a control system to prevent over-discharge of a battery subdivision having the lowest energy storage capacity.

Abstract: An aspect provides a method, including: normally discharging one or more battery cells housed in a flexible exterior material; determining one or more of the one or more battery cells has less than a predetermined voltage level; and actively discharging the one or more battery cells determined to have less than the predetermined voltage. Other aspects are described and claimed.

Abstract: A battery pack includes a battery cell, a current converting unit connected between the battery cell and a load and converts a discharge current of the battery cell, and a microcomputer that determines an amount of a discharge current of the battery cell and controls the current converting unit based on the amount of the discharge current. Accordingly, a current needed for the load may be adjusted in the battery pack.

Abstract: A system for assessing the accuracy of an electrochemical cell voltage measurement includes a cell discharge circuit electrically coupled to at least one electrochemical cell and configured to partially discharge the at least one cell when the cell discharge circuit is activated, and a cell measurement circuit electrically coupled to the at least one cell and to the cell discharge circuit. The cell measurement circuit is configured to measure a voltage of the at least one cell before activation of the cell discharge circuit and after activation of the cell discharge circuit. The cell measurement circuit compares the voltage before activation of the cell discharge circuit to the voltage after activation of the cell discharge circuit to detect if an error in the voltage measurement occurred.

Abstract: The main object of the present invention is to provide a lithium solid state secondary battery system capable of restoring the decrease of output characteristics of a lithium solid state secondary battery without deteriorating an anode. The present invention attains the above-mentioned object by providing a lithium solid state secondary battery system including a lithium solid state secondary battery and an overdischarge treating unit, wherein an anode active material layer of the above-mentioned lithium solid state secondary battery contains an anode active material and a sulfide solid electrolyte material containing Li, A (A is at least one kind of P, S, Ge, Al and B) and S and having an ortho-composition, and the above-mentioned anode current collector includes a metal.

Abstract: The invention disclosed is a method for decreasing the internal resistance or impedance of a battery or electrochemical cell is described which comprises the step of discharging the battery or cell until it reaches an overdischarge condition and maintaining the battery or cell in the overdischarge condition for a period of time sufficient to effect a diminution of the internal resistance or impedance of a battery or electrochemical cell; and a battery or electrochemical cell having a reduced impedance.

Abstract: Improved protection for a rechargeable battery from damage by being discharged below a cut-off voltage is provided. The measured voltage of a battery under load is lower than the measured voltage of the battery under no load. As the cut-off voltage for the battery is specified as a no load voltage, comparing the measured voltage of the battery under load to the cut-off voltage would result in stopping use of the battery with useable charge remaining. Through testing, a set of relationships for estimating the no load voltage of a battery under load has been determined. Using this set of relationships with battery measurements, an estimated no load voltage for the battery is determined. This estimated no load voltage is compared to the cut-off voltage. This allows for full use of the battery while stopping use of the battery when its voltage reaches the cut-off, thereby preventing damage.

Abstract: The battery monitoring circuit includes a first switch element, a second switch element, a third switch element. The battery monitoring circuit includes a first output capacitor connected to the second end of the first switch element at a first end. The battery monitoring circuit includes a first output controlling switch element connected between a second end of the first output capacitor and the ground. The battery monitoring circuit includes an AD converter that analog-to-digital converts a signal responsive to a voltage at an output terminal between the second end of the first output capacitor and the first output controlling switch element. The battery monitoring circuit includes a controlling circuit that controls turning the first to third switch elements and the first output controlling switch element and controls the AD converter.

Abstract: Provided are an apparatus and method for equalizing energy of battery cells. The apparatus includes a cell balancing controller, a cell balancing executor, and a temperature detector. The cell balancing controller detects a voltage of each of a plurality of cells included in a battery pack and, when a cell requiring cell balancing is extracted, decides a balancing duty to execute discharging control. The cell balancing executor discharges a voltage charged in each cell according to a cell balancing duty signal applied from the cell balancing controller. The temperature detector continuously monitors a temperature of the cell balancing executor to supply the monitored result to the cell balancing controller, and decides the balancing duty on the basis of a cell voltage differential and the temperature of the cell balancing executor.

Abstract: A battery control apparatus is provided which can keep an inter-terminal voltage of each single cell within a permitted range while permitted power is controlled in units of a battery pack. The battery control apparatus of the invention restricts the permitted power of the battery pack according to a degree of closeness of a close circuit voltage of the single cell to an upper limit or a lower limit of the permitted range.

Abstract: A battery control device capable of carrying out current limitation in consideration of constraints on other components than a battery main body is provided. A battery control device according to the invention has an average current table describing an average current allowed for each of plural time window widths, and limits a battery current in accordance with the description.

Abstract: A device is configured to receive a request for two or more battery partitions; create the two or more battery partitions according to the received request, where each of the two or more battery partitions relate to a respective function of the device; calculate usage of the two or more battery partitions; present information regarding the usage of the two or more battery partitions; receive a request to change an allotment of at least one of the two or more battery partitions; and re-partition two or more battery partitions according to the received request to change of the allotment of the at least one of the two or more battery partitions. Additionally, the device can be configured to charge one or more battery partitions in an order of priority, re-assign one or more battery partitions to a different area, and provide notifications of usage.

Abstract: Embodiments of the present invention include systems and methods of controlling power in battery operated systems. In one embodiment, the present invention includes a switching regulator for boosting voltage on a depleted battery to power up a system. The system may communicate with an external system to increase the current received from the external system. Embodiments of the present invention include circuits for controlling power received from external power sources such as a USB power source. In another embodiment, input-output control techniques are disclosed for controlling the delivery of power to a system or charging a system battery, or both, from an external power source.

Abstract: In a battery pack, undesired current consumption is reduced during a shipping period to extend the charge keeping time of the battery pack. The battery pack includes at least one of battery cells, a charge switch, a discharge switch, and a microcomputer for controlling the charge switch and the discharge switch in accordance with a voltage of the battery cells. The battery pack has a shipping mode where the battery pack is shut down during the shipping period.

Abstract: A battery balancing method and system which includes a plurality of cells connected in series, a balancer for each cell, a monitor configured to determine a state of charge (SOC) of each cell, and a microprocessor. The microprocessor iteratively calculates a SOC error for each cell, based on a theoretical balancing of the Min Q cell and the Max Q cell, until the SOC error is less than or equal to a first threshold; and iteratively re-calculates SOC error based on a net charge or discharge time for each balancer until the SOC error is less than or equal to a second threshold; and when the SOC error is less than or equal to the second threshold, instructs each balancer to physically balance each respective cell based on the respective calculated net charge or discharge time when the second threshold is met.

Abstract: A battery temperature rise causing system has a converting unit for converting voltage of electric power held in one of a rechargeable battery and an accumulator and applies the converted voltage to the other one, and a control unit controlling the converting unit to alternately perform first transfer of electric power from the battery to the accumulator and second transfer of electric power from the accumulator to the battery while changing the first transfer for the second transfer each time the battery voltage reaches a lower limit and changing the second transfer for the first transfer each time the battery voltage reaches an upper limit, and to increase temperature of the battery due to heat generated by electric current flowing through the battery during the electric power transfer.

Abstract: A terminal includes a first battery to supply power to the terminal if a power level of the first battery is above a first reference threshold, a second battery to supply power to the terminal if the power level of the first battery is below the first reference threshold, and a switch to connect at least one of the first battery and the second battery to power the terminal based on the power level of the first battery, in which the first battery is detachable from the terminal.

Abstract: A boost control method and system for a boost converter by which a stability of parts is secured when a fuel cell vehicle is started up, and the number of parts is reduced by eliminating an additional hardware construction such as a pre-charge relay. The boost control method includes analyzing a battery state before a boost, and determining a normal state and when the battery state is normal, a processor executes a first boost mode via the boost converter to primarily boost up a voltage of a bus terminal. In addition, the method includes analyzing situation data during the primary boost, and determining an abnormal state of the bus terminal and when the bus terminal is normal, the processor executes a second boost mode to increase a voltage of the bus terminal up to a final target value.

Abstract: The invention concerns a method, voltage source converter and computer program product for supporting an associate AC system and comprising: a number of cells (CA1, CA2, CA3, CA4, CA5, CA6, CB1, CB2, CB3, CB4, CB5, CB6, CC1, CC2, CC3, CC4, CC5, CC6), each cell comprising a string of switching elements in parallel with a cell capacitor, at least some cells further including a battery module group comprising at least one battery module connectable in parallel with the cell capacitor and a control unit (20) configured to selectively connect the battery module groups of a number of cells in parallel with corresponding cell capacitors for exchanging power with the associated AC system.

Abstract: An output power controller in a system having two or more secondary batteries connected in parallel. A battery ECU transfers all the stored electric charge from one secondary battery to another secondary battery when battery temperature and state of charge (SOC) are so low that an output power requirement cannot be satisfied. The SOC of the secondary battery increases by the transfer of the stored electric charge and output power sufficient for the output power requirement can be obtained. Further, the secondary batteries are heated by thermal energy generated by the transfer of the stored electric charge.

Abstract: A battery block for use in a power source system including battery blocks is provided with: a secondary battery; a communication circuit which outputs voltage information outside, the voltage information relating to a terminal voltage Vt of the secondary battery; a communication circuit which acquires the voltage information output from another battery block as other voltage information; and a discharge controller which discharges the secondary battery in a host battery block when a host voltage, which is the terminal voltage Vt of the secondary battery in the host battery block, is higher than a terminal voltage indicated by the other voltage information.

Abstract: A monitoring circuit for a battery module includes at least two terminals configured to be connected to bus lines of a bus system, a series circuit having a line terminating resistor, and a switching device. Ends of the series circuit are in each case electrically connected to one of the two terminals.

Abstract: A power system for a vehicle may include at least one controller and a battery having a plurality of cells. The at least one controller may, for each of the cells, determine a voltage of the cell, determine a discharge time to reduce the voltage to a value approximately equal to a minimum of the determined voltages, and cause the cell to discharge for the discharge time to balance the battery.

Abstract: A method that considers battery capacity for providing cell balancing for battery cells in a battery pack. The method includes providing a current state-of-charge for each battery cell in the battery pack for a current time frame and a previous state-of-charge for each battery cell in the battery pack from a previous time frame. The method also includes subtracting the current state-of-charge from the previous state-of-charge for each battery cell to generate a cell delta state-of-charge for each cell and providing an average cell delta state-of-charge of the cell delta state-of-charges for all of the cells. The method also includes dividing each cell delta state-of-charge by the average cell delta state-of-charge to provide a relative cell delta state-of-charge for each cell and dividing the current state-of-charge by the relative cell delta state-of-charge for that cell to generate a capacity adjustment state-of-charge that identifies the capacity of the cell.

Abstract: A rechargeable battery system that controls charge/discharge of a lithium ion rechargeable battery, includes: an internal resistance detection unit that detects or estimates an internal resistance value indicating an internal resistance at the lithium ion rechargeable battery; and a discharge control unit that executes control so as to set a discharge suspension period while the lithium ion rechargeable battery is discharged if the internal resistance value detected via the internal resistance detection unit during discharge of the lithium ion rechargeable battery exceeds a first threshold value.

Abstract: A vehicle is equipped with a main battery, an auxiliary machinery battery, a high-capacitance DC/DC converter which converts power on an electric path between the main battery and a motor-generator for traveling to supply the converted power to the auxiliary machinery battery, a low-capacitance sub power supply which converts power on an electric path between the main battery and an external power supply to supply the converted power to the auxiliary machinery battery, and a control device which controls the sub power supply. The control device determines whether or not the DC/DC converter has an abnormality, and operates the sub power supply to perform precharging when it is determined that the DC/DC converter is abnormal. An auxiliary machinery battery voltage V2 when precharging has been performed is set to a value which is higher by a predetermined voltage a than an auxiliary machinery battery voltage V1 when precharging has not been performed.

Abstract: In one aspect, the a system for charging an electrical storage device of a computer is disclosed. In one embodiment, the system includes at least one user input device that is operatively connected to the computer and configured to communicate input data to the computer in response to an action of a user. The input device has one or more transducers that are configured to receive a mechanical force resulting from user input to the input device and to convert the received mechanical force into electrical energy. The input device also has a connector that is configured to operatively connect the user input device to the electrical storage device of the computer and to deliver the electrical energy from the user input device to the electrical storage device.

Abstract: Disclosed is an apparatus for estimating a voltage of a secondary battery which includes a cathode comprising a first cathode material and a second cathode material with different operating voltage ranges, an anode comprising an anode material and a separator for separating the cathode from the anode. The apparatus comprises a control unit configured to estimate a voltage of a secondary battery based on a circuit model including a first cathode material circuit, a second cathode material circuit and an anode material circuit, each circuit modeled to change its voltage according to State Of Charge (SOC) of the electrode material corresponding the circuit and a current flowing through the circuit.

Abstract: In accordance with embodiments of the present disclosure, systems and methods for thermal protection in a power system may be provided. In accordance with certain embodiments of the present disclosure, a method for thermal protection in a power system having a plurality of power modules selectively enabled and disabled in accordance with an efficiency policy may be provided. The method may include determining if an operating temperature for the power system is greater than a first threshold temperature. The method may also include enabling one or more power modules disabled in accordance with the efficiency policy in response to a determination that the operating temperature is greater than the first threshold temperature.

Abstract: A power supply device according to the present invention includes a detector, a memory, and a determinator. The detector detects internal resistance, temperature, and SOC of a battery. The memory stores record data and a predetermined SOC range as storage data. The record data is used for estimating standardized available power at standard SOC temperature corresponding to the detected internal resistance and temperature. If the detected SOC of the battery falls within the range, the determinator estimates standardized available power at the standard SOC and temperature based on the detected internal resistance and temperature, and the record data. When the internal resistance, temperature, and SOC are detected by the detector, if the detected SOC falls within the range, the determinator estimates standardized available power at standard SOC temperature based on the detected internal resistance and temperature, and the record data.

Abstract: A battery pack features a shock-absorbing and sealed construction and an electronic control module that provides automatic recovery circuitry in the event of a short circuit in the load whereby the power is terminated and then restarted at a lower level so that removal of the short circuit may be detected. Full power is restored to the load when the short circuit is removed. In addition, the electronic control module of the battery pack uses the battery pack load, such as a cap lamp, to provide an indication of a low battery charge level. The electronic control module also provides a soft-start feature where the power provided to the bulb is ramped up to avoid current in-rush to the bulb during startup.

Abstract: In an all-solid-state lithium secondary battery provided with a sulfide-based electrolyte-containing layer, the production of hydrogen sulfide is effectively inhibited without deteriorating battery characteristics. A battery system (100) is provided with: an all-solid-state lithium secondary battery (1) using a sulfide-based solid electrolyte material; and a reducing device (2, 3, 5) for reducing a charge-discharge amount of the all-solid-state lithium secondary battery if a temperature in an inside of the all-solid-state lithium secondary battery reaches a first threshold value.

Abstract: It is an object to provide a battery system whose life can be extended. A cell pack having at least one lithium secondary battery that uses a manganese-based cathode material and a control unit that controls charging and discharging of the cell pack are provided, and the control unit controls charging and discharging within a low-degradation voltage range that is set on the basis of a target cell degradation rate.

Abstract: A battery alarm for use with a battery assembly is provided, the battery alarm including a first activation component, a signaling component, and an output component. The first activation component is configured to activate the alarm upon disengagement of the battery assembly from a battery-operated device and is further configured to deactivate the alarm upon engagement of the battery pack with the battery-operated device. The signaling component is coupled to the first activation component and is configured to transmit a signal when the alarm is activated. The output component is adapted to receive the signal from the signaling component and is configured to produce a visual, audible, and/or tactile output upon receipt of the signal from the signaling component.

Abstract: Methods and associated devices are described for discharging the high-voltage network, particularly a DC voltage intermediate circuit, in which for discharging the capacitors of the high-voltage network, switching devices are used that lie between the capacitors and at least one precharging resistor and a high-voltage battery, and the switching devices are switches having a specifiable positioning of the switching contacts or switching units or relays or contactors, which are switchable with the aid of a control device. The operation of the switching units takes place in such a way that the at least one precharging resistor is used simultaneously for charging and discharging the DC voltage intermediate circuit.

Abstract: A method and apparatus for determining the condition of a rechargeable battery determines a dynamic impedance of the battery while discharging the battery, and determines a battery condition category based on the dynamic impedance. The battery can be discharged in a manner that recovers the stored energy being discharged from the battery.

Abstract: Systems and method for providing sensors in batteries are provided. In certain aspects of the disclosure, a battery comprises a housing dimensioned to fit within a battery compartment of the communication device, a battery cell configured to supply power to the communication device, one or more sensors within the housing configured to measure a condition external to the battery and to received power from the battery cell, and an interface configured to interface the one or more sensors with a processing system in the communication device.

Abstract: The invention provides a solid secondary battery system including a solid secondary battery having a cathode active material layer, an anode active material layer, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer, and an overdischarge processing unit for discharging the solid secondary battery until a SOC of the solid secondary battery becomes less than 0%.