Abstract: A short circuit detection method includes obtaining battery data associated with a state of a battery from a charging cycle of the battery, estimating an error in the battery data using an estimation model, determining a state indicator corresponding to the error in the battery data, and detecting a short circuit of the battery based on a result of comparing the state indicator and a short circuit threshold.

Abstract: The present invention provides a TOF camera module and electronic device and an assembly method, wherein the TOF camera module includes a floodlight module, a receiving module and a plurality of electronic components, and a part of the electronic components is conductively connected to the floodlight module, a part of the electronic components is conductively connected to the receiving module, and the receiving module provides a first circuit board and at least one of the plurality of electronic components is located on a back side of the first circuit board of the receiving module.

Abstract: Provided are a battery controller, a wireless battery control system, a battery pack and a battery balancing method. The battery controller is for a battery module comprising a positive terminal, a negative terminal and a plurality of battery cells electrically connected in series between the positive terminal and the negative terminal. The battery controller comprises a voltage measuring unit to generate a voltage signal indicating a cell voltage of each of the plurality of battery cells, and a control module. The control module wirelessly transmits sensing data indicating the cell voltage of each of the plurality of battery cells while the control module is operating using a first cell voltage of a bottommost cell of the plurality of battery cells as power for operating the control module.

Abstract: An ESS capable of detecting a defective battery cell, the ESS in accordance with an exemplary embodiment, may include a plurality of battery cells, and a control unit for controlling the charge/discharge of the ESS, wherein the control unit includes an SOC calculation unit for calculating the SOC of the ESS, a voltage measurement unit for measuring the voltage of each of the plurality of battery cells, and a poor battery cell detection unit for detecting a defective battery cell from the voltages measured in the voltage measurement unit.

Abstract: A battery management system includes a monitoring device and a controller. The monitoring device is arranged in a housing accommodating a battery. The monitoring device monitors the battery and acquires battery monitoring information that includes information indicating a state of the battery. The controller performs wireless communication with the monitoring device and executes a predetermined process based on the battery monitoring information. The monitoring device holds imperfect information that is battery monitoring information indicating failure of data transmission/reception between the monitoring device and the controller. The monitoring device retransmits information corresponding to the imperfect information from next time the battery monitoring information is transmitted.

Abstract: A fuel cell vehicle and a method for controlling power generation for the same are provided. The fuel cell includes a motor supplying driving power for driving the fuel cell vehicle, a fuel cell and a battery supplying electrical power for driving the motor, and a vehicle controller for operating the fuel cell in advance by predicting a shortage of discharge power of the battery by monitoring the discharge power of the battery.

Abstract: A battery management device is configured to set a limited measurement range that limits a range for measuring a voltage of each of a plurality of batteries for a vehicle. The battery management device is configured to measure the voltage of each of the plurality of batteries within the limited measurement range.

Abstract: Embodiments of a method and/or system for charging one or more electric vehicles can include: receiving a request (e.g., a request including one or more parameters; etc.); determining a check in at an Electric Vehicle Service Equipment (EVSE) for the charging session; and/or causing the EVSE to charge the electric vehicle based on a power distribution type for the charging session.

Abstract: A current protection system for an energy storage system includes: batteries connected in parallel; battery control units respectively connected to the batteries, and respectively having battery current measurement units; a battery connection panel connecting the battery control units to one connection point, the battery connection panel having a contact point current measurement unit; and a control unit configured to sum current values respectively measured by the battery current measurement units and a current value measured by the contact point current measurement unit, and to detect a presence of an internal short circuit based on the sum.

Abstract: A battery cell resistance measurement device including: a carrier signal generation module configured to generate a carrier signal of a first frequency and a second frequency different from the first frequency; a resistance unit including a first resistor and a second resistor having a different resistance value from the first resistor; an impedance measurement unit configured to measure an impedance of both ends of a corresponding application target in a state where the carrier signal is applied to any one of the first resistor, the second resistor, and a battery cell; a switching unit configured to selectively connect any one of the first resistor, the second resistor, and the battery cell to the impedance measurement unit; and a control unit configured to calculate an internal resistance of the battery cell based on the impedance value measured by the impedance measurement unit.

Abstract: The disclosure provides a battery management system and a battery pack. The battery management system includes at least two analog front-end chips and a control unit. The analog front-end chip is configured to acquire an output voltage, an output current, or a working temperature of a battery. And the control unit controls the analog front-end chip to be powered on and down. When any analog front-end chip is awakened by an external interference signal, the analog front-end chip directly or indirectly supplies power to the control unit to enable the control unit to work, and then the control unit sends a power-down signal to the analog front-end chip to power the analog front-end chip down.

Abstract: A controller for managing a battery pack includes: a detection terminal, for transmitting an enable signal when values of battery parameters for the battery pack satisfy a sleep condition, where the enable signal enables the detection circuit to detect whether the battery pack is connected to a load and whether the battery pack is connected to the charger; and a receiving terminal, for receiving a detection result transmitted by the detection circuit. The detection result indicates whether the battery pack is connected to at least one of the load and charger. The controller controls the battery pack to enter a sleep mode of the sleep modes based on the detection result. The controller also includes a control terminal, for transmitting a control signal to control an on/off state of a charging switch and/or a discharging switch. The control signal is generated by the controller based on the detection result.

Abstract: A semiconductor device includes: a semiconductor layer; first and second transistors; one or more first source pads and a first gate pad of the first transistor in a first region of the upper surface of the semiconductor layer; and one or more second source pads and a second gate pad of the second transistor in a second region of the upper surface adjacent to the first region in a plan view of the semiconductor layer. In a plan view of the semiconductor layer, a virtual straight line connecting the centers of the first and second gate pads passes through the center of the semiconductor layer and forms a 45 degree angle with each side of the semiconductor layer. An upper surface boundary line between the first and second regions monotonically changes in the directions of extension of the longer and shorter sides of the semiconductor layer.

Abstract: Disclosed is an apparatus and method for balancing battery packs connected in parallel. If the pack voltage deviation of the first to nth battery packs is greater than the first threshold value, a battery cell having a higher voltage than the pack balancing target voltage set according to a preset criterion among the voltages of all cells is discharged to perform pack balancing for each battery pack and if the pack voltage deviation is equal to or smaller than the first threshold value, a battery cell having a higher voltage than the cell balancing target voltage set according to a preset criterion among the voltages of the cells included in a battery pack having a cell voltage deviation greater than the second threshold value is discharged to perform cell balancing for each battery pack.

Abstract: A vehicle comprises a battery, a temperature adjustment unit, an inlet, a relay unit, a relay unit, a relay unit, and an ECU. When a power charging station is connected to the inlet, the ECU controls the relay unit to assume a closed position to perform external charging to charge the battery by the power charging station. When the ECU drives the temperature adjustment unit during the external charging and a component on a charging path at an electrical path located between a branch point and a branch point is higher in temperature than a threshold temperature, the ECU controls the relay unit to assume an open position and the relay unit to assume a closed position.

Abstract: A secondary circuit device including a secondary coil for transmitting and/or receiving magnetic energy of a magnetic field and converting the magnetic energy into electrical energy, a transmission unit for transmitting the electrical energy, a detection unit, and a clamper circuit, wherein the magnetic field is generated by a primary coil of a primary circuit device; the transmission unit has an inlet for connecting the secondary coil; the transmission unit has an outlet for providing the electrical energy as voltage and/or current; the detection unit is connected to the inlet and/or the outlet of the energy transmission unit, in order to detect an overvoltage at the inlet and/or the outlet; and, when the overvoltage is detected, the detection unit is configured to influence the magnetic field in the secondary coil via the clamper circuit such that a current jump and/or a voltage jump is brought about in the primary coil.

Abstract: A battery pack comprising a substrate comprising a battery power bus integrated into the substrate; and a pack controller; and at least one electrochemical cell connected directly to the substrate. A printed circuit board comprising a power bus integrated into the printed circuit board, wherein the power bus is connected to and configured to transfer power to and/or from at least one electrochemical cell; and at least one controller configured to control the at least one electrochemical cell. A thermal management system comprising at least one electrochemical cell; and a substrate directly connected to the at least one electrochemical cell and configured to transfer heat, power, and signals between the substrate and the at least one electrochemical cell. A thermal management method. A method of assembling a battery pack, comprising attaching at least one electrochemical cell of the battery pack directly to a substrate at least in part by welding.

Abstract: A charging method includes detecting whether two battery modules are balanced, simultaneously charging the two battery modules by a first charging current when the two battery modules are balanced, and executing a specific charging procedure when the two battery modules are not balanced. The step of executing the specific charging procedure includes charging by the first charging current a first battery module between the two battery modules that is not balanced and disconnecting the other between the two battery modules, and simultaneously charging the two battery modules by a second charging current upon the first battery module reaching balance, wherein the second charging current is less than the first charging current.

Abstract: The safety is ensured in such a manner that with an abnormality detection system of a secondary battery, abnormality of a secondary battery is detected, for example, a phenomenon that lowers the safety of the secondary battery is detected early, and a user is warned or the use of the secondary battery is stopped. The abnormality detection system of the secondary battery determines whether the temperature of the secondary battery is within a temperature range in which normal operation can be performed on the basis of temperature data obtained with a temperature sensor. In the case where the temperature of the secondary battery is high, a cooling device is driven by a control signal from the abnormality detection system of the secondary battery. The abnormality detection system of the secondary battery includes at least a memory means. The memory means has a function of holding an analog signal and includes a transistor using an oxide semiconductor for a semiconductor layer.

Abstract: A battery management system for dynamically balancing power in a battery module is provided. The battery management system comprises a plurality of modules, and each of the plurality of modules comprises a plurality of bricks. Each of the plurality of bricks comprises a plurality of blocks, electrically connected in one of a series configuration or a parallel configuration and a controller assembly provided in each of the plurality of the modules. The controller assembly comprises a first converter adapted to be connected to the plurality of bricks and a second converter adapted to be connected to an external system. The controller assembly is configured to obtain a plurality of battery pack parameters from the plurality of bricks using the first converter, process the obtained plurality of battery pack parameters and determine a current level to regulate a charging or discharging of the battery pack using the second converter.

Abstract: An apparatus for detecting leaks in a battery includes a plurality of cells, each which include a pair of conductive leads bracketing a polymer seal, and a wireless measurement and communication chip (“chip”) configured to perform capacitive measurement, showing a change in capacitance when bridged by ionically conductive species or when a wick is suffused with an electrolyte.

Abstract: A system can plan a route for a machine, such as an electric vehicle or other mobile machine, from a current location of the machine to a maintenance station where a service operation is to be performed on the machine. The service operation can be associated with a target state of charge (SoC) for a battery of the machine. The system can plan the route such that an expected energy consumption level, associated with traversal of the route by the machine, causes the SoC of the battery to satisfy the target SoC when the machine arrives at the maintenance station. The system can also dynamically adjust the route, charges of the battery, and/or machine operations performed along the route, during travel to cause the SoC of the battery to satisfy the target SoC when the machine arrives at the maintenance station.

Abstract: A battery secondary protection circuit includes a first pin, a second pin, a first sensing circuit, a first current source, a first enabling circuit and a first protection circuit. The first pin and the second pin are coupled to two terminals of a first battery. The first sensing circuit, coupled between the first pin and second pin, provides a first sensing signal and a second sensing signal. The first current source, coupled between the first pin and second pin, provides a first current. The first enabling circuit, coupled to the first sensing circuit and first current source, generates a first enabling signal according to the first sensing signal. The first protection circuit is coupled to the first sensing circuit. When the first enabling signal enables the first current source, the first protection circuit generates a first protection signal according to a second sensing signal changed with the first current.

Abstract: The invention provides a voltage balancing system for voltage balancing. The voltage balancing system includes an analog front end arranged in parallel with the cell group, a micro control unit communicating with the analog front end, a communication isolation module connected between the analog front end and the micro control unit, and a balancing module. The input of the balancing module is connected to the cell group to input the total voltage of the cell group. The output of the balancing module is connected to the micro control unit and the communication isolation module to output the operating voltage of the micro control unit and the communication isolation module.

Abstract: A charge and discharge control device of a battery charges the battery with a constant current in a constant current mode. When the voltage of the battery corresponds to an end-of-charge voltage, the charge and discharge control device converts the constant current mode to a constant voltage mode and thereby charges the battery with a constant voltage. The end-of-charge voltage is set as a first end-of-charge voltage minus a negative electrode threshold potential from the full-charge voltage of the battery, and the negative electrode threshold potential is a potential value of the negative electrode where a negative electrode active material contained in the battery causes a phase change.

Abstract: A charger includes a housing with an interface positioned in a front wall and configured to engage a battery pack. The interface includes charging terminals positioned between a first rail and a second rail, a first groove positioned between the first rail and a wall of the housing, and a second groove positioned between the second rail and the wall of the housing. The interface is in communication with an interior of the housing. A fan is coupled within the housing adjacent the interface, and an air passage member includes a hollow body that has a first end coupled to the fan and a second end spaced apart from the first end extending through another wall of the housing. The fan is operable to suck an air flow into the housing from outside the housing and guide the air flow through the air passage member to the interface.

Abstract: The safety is ensured in such a manner that with an abnormality detection system of a secondary battery, abnormality of a secondary battery is detected, for example, a phenomenon that lowers the safety of the secondary battery is detected early, and a user is warned or the use of the secondary battery is stopped. The abnormality detection system of the secondary battery determines whether the temperature of the secondary battery is within a temperature range in which normal operation can be performed on the basis of temperature data obtained with a temperature sensor. In the case where the temperature of the secondary battery is high, a cooling device is driven by a control signal from the abnormality detection system of the secondary battery. The abnormality detection system of the secondary battery includes at least a memory means. The memory means has a function of holding an analog signal and includes a transistor using an oxide semiconductor for a semiconductor layer.

Abstract: Present embodiments include a control system for one or more battery cells. The control system includes a bi-stable relay configured to switch a state of the bi-stable relay upon receiving a control signal to electrically connect or electrically disconnect the one or more battery cells to a bus and to remain in the state after receiving the control signal. The control system includes a controller configured to be operatively coupled to the bi-stable relay and configured to send the control signal indicative of instructions to control operation of the bi-stable relay based on the state.

Abstract: Automatically updating a full charge capacity (FCC) of a battery of an information handling system, the method including: determining that the SOC of the battery is less than the SOC threshold; determining that the time since the previous update of the FCC of the battery is greater than the time threshold; identifying configuration parameters for an update of the FCC of the battery; comparing the configuration parameters with current conditions of the battery; based on comparing the configuration parameters with current conditions of the battery, determining that the current conditions of the battery are within bounds of the configuration parameters; and in response to determining that the current conditions of the battery are within the bounds of the configuration parameters, updating the FCC of the battery.

Abstract: The battery monitoring techniques described herein use a self-characterizing wireless monitor coupled to a battery to monitor different properties of the battery. The wireless monitor may measure, among other things, an alternating current frequency response (ACFR) of the battery. To accomplish this, the wireless monitor may generate and inject a stimulus signal into the battery, and the monitor may then synchronously measure the corresponding impedance response of the battery.

Abstract: An electric work machine (1), such as a power tool, comprises a motor (50), a manipulatable part (12) such as a trigger switch, and a control part (36). The motor is energized with electric current supplied by a battery pack (22). By manipulating the manipulatable part, the control part energizes the motor. The control part also acquires information concerning the state of the battery from the battery pack, and, if appropriate based on the information obtained from the battery pack, takes measures (such as limiting a discharge current) to restrain, delay and possibly avert the performance of a protection (discharge-prohibited) operation by the battery pack.

Abstract: A fully integrated circuit configuration that can be utilized to prevent abnormal discharge or overcharge in ultra-portable electronic systems is described. This battery protection integrated circuit can be enhanced by the addition of traditional battery protection schemes such as current limiting, overcurrent clamping, under voltage lock out and over voltage protection. This battery protection scheme utilizes a high side switch approach utilizing an ultra-low leakage PMOS power switch rather than the traditional low side NMOS switching.

Abstract: Provided are a circuit control method, a battery controller, a battery management system, a battery, an electrical apparatus, and a vehicle. The circuit control method includes: acquiring an apparatus wake-up signal; determining whether a power source terminal voltage of a charging circuit of a battery on the apparatus is greater than a first threshold and whether a change rate in a first time length is less than a second threshold, wherein the charging circuit is a circuit connecting the battery on the apparatus and a generator, and the power source terminal voltage is an output voltage of the generator; and issuing a first instruction when the power source terminal voltage of the charging circuit of the battery on the apparatus is greater than the first threshold and the change rate in the first time length is less than the second threshold, so that the charging circuit is turned on.

Abstract: Module-based energy systems are provided having multiple converter-source modules. The converter-source modules can each include an energy source and a converter. The systems can further include control circuitry for the modules. The modules can be arranged in various ways to provide single phase AC, multi-phase AC, and/or DC outputs. Each module can be independently monitored and controlled.

Abstract: A method for adapting a usage level of a battery pack includes measuring cell sense data for each respective battery cell using a cell sense circuit, the cell sense data including a cell voltage, current, and temperature. The method includes processing the cell sense data, for each respective battery cell, through multiple battery state functions of a controller to generate numeric cell degradation values (CDVs). The battery state functions are calibrated relationships of the cell sense data to predetermined battery fault conditions. Thereafter, the method includes automatically adapting the usage level of the battery pack during operation of the battery pack, via the controller, based on the numeric CDVs. An electric powertrain system includes the battery pack, cell sense circuit, a rotary electric machine, and a controller configured to execute the above method.

Abstract: In a portable device, a load module includes a discharge switch for discharging a battery pack, and a detection circuit that detects a protection signal to control the discharge switch. A charge module includes a charge switch for charging the battery pack, and a detection circuit that detects the protection signal to control the charge switch. The battery pack includes a protection terminal that provides the protection signal, and protection circuitry that sets the protection signal to a state according to the battery pack's status. The protection signal turns the charge switch on and the discharge switch off if the protection signal is in a first state, turns the charge switch off and the discharge switch on if it's in a second state, turns the charge and discharge switches off if it's in a third state, and turns the charge and discharge switches on if it's in a fourth state.

Abstract: A method for managing charging and discharging of a parallel-connected battery pack, including: obtaining a voltage value and a state of charge of a plurality of battery packs; comparing the voltage value and the state of charge of each of the battery packs with a reference voltage value and a reference state of charge; and managing charging and discharging of the plurality of battery packs based on a comparison result. The method can enhance automation of paralleling of battery packs, increase adaptability of a paralleling system, improve paralleling efficiency, further reduce operation and maintenance costs, and improve user experience.

Abstract: When a module controller of a battery system detects an abnormality of a battery module, the module controller selects the battery module without stopping the battery module. After that, the module controller compares a current value of a current supplied to a load, with a total value of rated currents of all battery modules that are normal and that are supplying power to the load. When the current value of the current supplied to the load is greater than the total value of the rated currents of the battery modules, the module controller performs a control to stop all the battery modules. When the current value of the current supplied to the load is less than or equal to the total value of the rated currents of all the battery modules that are supplying power to the load, the module controller performs a control to stop the abnormal battery module and not to stop the normal battery modules.

Abstract: An electronic device according to various embodiments of the present invention includes: a memory which stores one or more mapping parameters that indicate the correlation between a voltage change amount and the state of health (SOH) of the battery; and a processor, wherein the processor can be set to: detect that an external device for charging the battery is connected to the electronic device; charge the battery by using a charging current supplied from the external device; decide on at least one mapping parameter among the one or more mapping parameters on the basis of at least the charging current; check the voltage change amount of the battery while the battery is being charged; and acquire the SOH of the battery at least partially on the basis of the at least one mapping parameter and the voltage change amount.

Abstract: The application provides a method, a charging-discharging device, a cloud server, a system and a medium for charging-discharging interaction, which belong to the fields of electric power technologies. The method for charging-discharging interaction includes: the charging-discharging device transmits a vehicle-to-grid V2G function confirmation message to a battery management system of a target vehicle; when no V2G function feedback message fed back by the battery management system is received within a preset period of time after transmitting the V2G function confirmation message, the charging-discharging device transmits a first indication message to a cloud server to indicate that the target vehicle is V2G-disabled; in response to a non-V2G charging instruction received from the cloud server, the charging-discharging device performs a non-V2G charging for the target vehicle. The availability of the charging-discharging device can be improved according to embodiments of the present application.

Abstract: Provided is a battery pack in which the voltage of each battery cell is monitored using an inexpensive general-purpose microcomputer. A battery pack comprises: a plurality of battery cells connected in series; a plurality of voltage detection units which detect the voltage of each of the battery cells; and a microcomputer which measures the voltages of the battery cells from the output of each of the voltage detection units. Switch control circuits for switching on or off the outputs from the voltage detection units to the microcomputer are respectively arranged on each of the voltage detection units. Voltage divider circuits dividing the detected voltages into voltages lower than or equal to the power supply voltage of a control unit are arranged on the output sides of the voltage detection units. The microcomputer inputs the voltages divided by the voltage divider circuits and measures the voltages of the battery cells.

Abstract: According to some embodiments, system and method are provided comprising determining a maximum storage capacity of an energy storage system for a time window; performing a first sort of cycles by sorting in numerical order according to a ratio of a load demand to a total available power from a power generation system at each cycle of time window; assigning a unique, charge priority to each cycle; determining, starting from a highest charge priority, a charge power for each cycle until a total charge power satisfies the maximum storage capacity; determining, starting from a lowest sorted charge priority, an available discharge power for each cycle until a total discharge power exceeds the maximum storage capacity; performing a second sort in a temporal order of the cycles; determining, starting from an earliest cycle, an available state-of-charge (SOC) and adjusting the SOC of the energy storage system for each cycle.

Abstract: A grouped consensus power allocation method for multiple energy storage units is provided, including determining a grouped coordination control strategy of multiple battery energy storage units (BESUs) of a BESS (battery energy storage system), where the multiple BESUs are communicated through a communication topology and grouped into a charging group and a discharging group, performing power coordination control power coordination control between the charging group and the discharging group based on a distributed algorithm, determining whether a switching between the charging group and the discharging group is triggered during an operation process of the BESS, and switching when it is triggered. The method can reduce the number of charging/discharging state conversions of the BESUs, prolong the service life of energy storage, ensure that the power allocation results meet the power constraints of the BESUs, reduce low-power operation times of the BESUs, and improve the efficiency of energy storage operation.

Abstract: An electronic device is provided. The electronic device includes a housing, a battery disposed inside the housing, a power management module for controlling charging of the battery, and at least one processor operationally connected with the battery and the power management module. The at least one processor is provided to direct a plurality of charging intervals while charging the battery, each of the plurality of charging intervals having a target voltage, to alternately charge the battery in a first mode and in a second mode through the power management module, wherein a charging current flowing into the battery is uniformly maintained in the first mode and a voltage of the battery is uniformly maintained in the second mode, and to switch the first mode to the second mode when the voltage of the battery reaches the target voltage in the first mode.

Abstract: A protection system for a battery system includes a battery control module configured to selectively open at least one contactor to isolate the battery system from a load in response to a sensed current being greater than a first threshold and within a first current range, at least one fuse connected between first and second terminals of the battery system and configured to open to isolate the battery system from the load in response to the sensed current being greater than a second threshold and within a second current range that is greater than and offset from the first current range, and an auxiliary protection module configured to selectively form a short circuit between first and second terminals in response to the sensed current being greater than the first threshold, less than the second threshold, and within a coverage gap region between the first and second current ranges.

Abstract: A setting device including a processor is provided. The processor is configured to, when occurrence of a secondary disaster is predicted after occurrence of a disaster, set a region in which the secondary disaster is predicted to a charging-prohibited zone in which use of a charging facility for charging a battery installed in a vehicle is prohibited.

Abstract: The disclosure features systems and methods for protecting transistors of a wireless power receiver. Systems can include a gate driver configured provide a control signal to control switching of the transistor gate such that power is transmitted to a load coupled to the receiver; and a controller coupled to the gate driver and configured to generate a protection signal. The protection signal can include (i) a fault signal indicating a fault in one or more components of the receiver; (ii) a signal indicating that the transistor gate should be latched; and/or (ii) at least one undervoltage signal indicating that an undervoltage condition exists in a power supply of the gate driver. Based on the generated protection signal, the gate driver can be configured to adjust the provided control signal to latch the transistor gate such that power is not transmitted to the load.

Abstract: A power system includes a primary bus connected to a traction battery, a secondary bus connected to an auxiliary battery, a power converter between the traction and auxiliary batteries, and a controller. The controller commands the power converter to increase a magnitude of current output to the secondary bus when an amount of charge current received by the traction battery exceeds a first amount threshold and commands the power converter to decrease the magnitude when an amount of charge current received by the auxiliary battery exceeds a second amount threshold.

Abstract: Methods and apparatus are disclosed for battery current monitoring. An example apparatus includes a haptic device, an isolation switch to deliver power from a battery to the haptic device, an integrator to integrate a signal based on a current from the battery to the haptic device to generate an integrator output, and control logic to control the isolation switch based on a comparison of the integrator output to a threshold.

Abstract: A multi-battery system implements operations to equalize discharge path impedance. The system includes first and second batteries of different capacities each coupled to a battery rail that supports source load electronics. The system includes charge control electronics configured to decouple the first battery from the battery rail when the discharge path of the first battery and the discharge path of the second battery have unequal impedance and to recouple the first battery to the battery rail when the discharge path of the first battery and the discharge path of the second battery have substantially equal impedance.