Abstract: Disclosed is an apparatus and method for diagnosing an abnormality in a cell balancing circuit in a battery pack including a plurality of cells corresponding to each cell balancing circuit. The present disclosure turns off cell balancing switches included in a cell balancing circuit to be diagnosed and an adjacent cell balancing circuit among the cell balancing circuits. Also, the present disclosure stores a voltage value between nodes of the cell (hereinafter referred to as a ‘diagnosis voltage value’) by turning on the cell balancing switch of the cell balancing circuit to be diagnosed. Also, the present disclosure calculates a difference value between adjacent cell voltage values (hereinafter referred to as a ‘cell difference value’) and a difference value between adjacent diagnosis voltage values (hereinafter referred to as a ‘diagnosis difference value’).

Abstract: A battery control device for a battery module includes a plurality of integrated circuits. Each integrated circuit includes: a constant voltage circuit that lowers a total voltage of a battery cell group corresponding to the integrated circuit to an integrated circuit internal voltage; a signal generation circuit that generates, based upon a first signal provided by a higher-order control circuit, a second signal assuming a wave height value different from a wave height value of the first signal and outputs the second signal; and a startup circuit that includes a first comparator assuming a first decision-making threshold value corresponding to the first signal and a second comparator assuming a second decision-making threshold value corresponding to the second signal, and starts up the constant voltage circuit in response to a change in an output from at least either the first comparator or the second comparator.

Abstract: A method and an apparatus using a power transistor in a fuel cell stack diagnostic system provides an apparatus using a power transistor in a fuel cell stack diagnostic system. The apparatus includes a regenerative braking detector that detects regenerative braking of a fuel cell vehicle equipped with a fuel cell stack diagnostic system; a voltage rise determiner that determines whether a voltage rise due to regenerative braking of a fuel cell vehicle is a predetermined value or more; and a power transistor controller that controls an AC signal generator so that the voltage due to the regenerative braking is discharged by the power transistor, when the voltage rise due to regenerative braking determined by the voltage rise determiner is a predetermined value or more.

Abstract: Disclosed are a voltage measuring apparatus and a battery management system including the same. The voltage measuring apparatus is connected to a plurality of battery cells connected to each other in series to measure respective voltage of the battery cells. The voltage measuring apparatus includes a first node coupled to one of an positive electrode and a negative electrode of one of a plurality of battery cells as a voltage measuring target, amplifies a voltage difference between the first node and the second node to generate an error voltage, converts the error voltage into a digital signal, and compensates for a polarity of the digital signal.

Abstract: The voltage measuring apparatus is connected to a plurality of battery cells connected to each other in series to measure respective voltages of the battery cells. The voltage measuring apparatus includes a sample/hold amplifier configured to sample and hold positive electrode and negative electrode voltages of the battery cells to generate first and second output voltages, a differential voltage converter configured to generate a battery cell voltage according to a voltage difference between a positive input terminal and a negative input terminal, and a switching unit configured to control the first and second output voltages and connection between the positive input terminal and the negative input terminal so that a polarity of the voltage difference is constant. The sample/hold amplifier electrically insulates the switching unit from the battery cells.

Abstract: A device for measuring a maximum cell voltage among cell voltages of a plurality of battery cells connected in series includes a plurality of ohmic resistors connected in series. The device is configured to be connected to a plurality of battery cells connected in series in such a way that a respective battery cell is associated with each ohmic resistor according to the series connections. Each ohmic resistor, with the exception of a first ohmic resistor, is configured to conduct the larger of (i) a current that corresponds to the cell voltage of the associated battery cell, and (ii) the current that is conducted by the preceding ohmic resistor in the series connection.

Abstract: There is provided a battery voltage detector circuit which uses a multiplexer system and which is capable of reducing the influence of the deviation of a detected voltage attributable to a parasitic capacitance, thus improving the accuracy of voltage detection. The battery voltage detector circuit that monitors the voltages of a plurality of batteries connected in series includes a flying capacitor, a multiplexer switch that sequentially connects the flying capacitor to the plurality of batteries, a voltage detecting unit that detects the voltage of the flying capacitor, a first reference potential detecting unit connected to one terminal of the flying capacitor, a second reference potential connecting unit connected to the other terminal of the flying capacitor, and a control circuit that controls the multiplexer switch, the first reference potential connecting unit and the second reference potential connecting unit.

Abstract: An assembled battery management system has an assembled battery having a plurality of battery modules connected in series, wherein each of the battery modules has a plurality of battery cells connected in series, a connection member that connects the plurality of battery modules, and a battery voltage detection device that detects voltages of the battery cells. The battery voltage detection device has a monitoring section having a voltage detector that detects the voltages of the battery cells, wherein the monitoring section monitors the voltages of the battery cells based on a detection result of the voltage detector, and a plurality of voltage input terminals connected to the monitoring section. Each of the battery modules includes a plurality of voltage detection terminals connected to a positive electrode and a negative electrode of each of the modules as well as connecting points of the battery cells.

Abstract: A device is provided for monitoring an electrical accumulation battery that includes a set of cells connected in series. The device includes means for measuring a current intensity delivered by the battery; means for measuring an electrical voltage between an upstream connection point and a downstream connection point of each cell of the battery; a recorder that records a zero-current electrical voltage between the upstream connection point and the downstream connection point of each cell of the battery; and an electrical resistance estimator configured to periodically estimate an electrical resistance of each cell in the battery, between the upstream connection point and the downstream connection point.

Abstract: A device for measuring a minimum cell voltage among cell voltages of a plurality of battery cells connected in series includes a plurality of ohmic resistors connected in series. The device is configured to be connected to a plurality of battery cells connected in series in such a way that a respective battery cell of the plurality of battery cells is associated with each ohmic resistor of the plurality of ohmic resistors according to the series connections. Each ohmic resistor of the plurality of ohmic resistors, with the exception of a first ohmic resistor, is configured to conduct the smaller of a current that corresponds to the cell voltage of the associated battery cell and the current that is conducted by a preceding ohmic resistor in the series connection.

Abstract: A battery system monitoring device that monitors a battery system provided with a cell group having a plurality of battery cells connected in series with each other, including: a first control device that monitors and controls states of the plurality of battery cells of the cell group; a second control device that controls the first control device; a temperature detection unit that measures a temperature in the vicinity of the first control device; and a plurality of voltage detection lines, for measuring an inter-terminal voltage of the battery cell, which connect each of a positive electrode and a negative electrode of the battery cell and the first control device. The first control device includes a balancing switch, which performs balancing discharge of the battery cell for each of the battery cells.

Abstract: A method for disassembling a battery pack to separate a secondary battery which can be reused, without impairing the performance of a secondary battery, having remaining life which, constitutes the battery pack. A pair of holding plates is brought into contact with binding plates on both ends of a battery pack to compress the battery pack in the stacking direction. The open circuit voltage before and after the compression is measured, and based on an amount of change of the open circuit voltage before and after compression, a battery pack which can be reused is separated.

Abstract: Provided is an apparatus for measuring current and voltage of a secondary battery pack in synchronization manner, comprising a voltage measurement circuit for periodically measuring and outputting the level of a charging voltage of each of a plurality of battery cells contained in a battery pack; a current measurement circuit for periodically measuring and outputting the level of current flowing into or out of the battery pack; and a control unit for synchronizing a time difference between a current measurement time point of the battery pack and a voltage measurement time point of each battery cell with a reference delay time.

Abstract: A capacitor has modules each consisting of a plurality of capacitor cells stacked together, and a radiator including heat exchange portions connected to a vehicle body at the ground potential is disposed adjacent to the modules. If an electric leakage occurs to any of the capacitor cells, a leakage detection voltage as a potential difference between the potential of the cell under the leakage and the ground potential is correlated with a module voltage, to provide a constant ratio, from which it is determined that the capacitor is in an abnormal condition.

Abstract: A processing device for a battery pack including a plurality of batteries has a voltage detection section configured to detect the voltage of each of the batteries, a first processing section configured to perform first processing for discharging the battery pack, and a second processing section configured to perform second processing for individually charging the batteries. The second processing section is configured to suppress a voltage drop by performing the second processing on the battery of which the voltage value has been reduced to a first predetermined value during the discharging in the first processing.

Abstract: A battery management system includes several first measuring units, each associated with at least one respective battery module of the battery to detect a measured variable. The battery management system also includes a control device having a first microcontroller and a second microcontroller, a first communication connection configured to transfer data between the first measuring units and the control device, and several second measuring units configured to detect the measured variable from the battery modules of the battery in addition to the detection of the measured variable by the first measuring units. A second communication connection is used to transfer data between the second measuring units and the control device. The first microcontroller is configured to evaluate measurement data detected by the first measuring units, and the second microcontroller is configured to evaluate measurement data detected by the second measuring units independently of the first microcontroller.

Abstract: A method of estimating a state of charge of an electric battery including a plurality of electric accumulators as cells. The method includes: a) determining a state of charge of each cell of the battery, b) determining a range of use of the battery equal to a maximum predetermined value of the state of charge of a cell minus deviation between the state of charge of a most charged cell and the state of charge of a least charged cell which are determined in a), c) determining the state of charge of the battery as equal to the ratio between the state of charge of the least charged cell determined in a) and the range of use of the battery determined in b).

Abstract: Provides a battery monitoring system including a battery cell number setting section that sets each LSI with the respectively individual number of battery cells C to which they are connected. When a command to sequentially measure the battery voltage of the battery cells is input, a cell selection control section compares the setting value with the commanded measurement start battery cell number. When the setting value is equal to or greater, performs measurement in sequence starting from the battery cell corresponding to the measurement start battery cell number. When the setting value is less, measurement is performed in sequence starting from the battery cell corresponding to the setting value. In a boost control section, during when the battery voltages with 3 higher potential battery cells is measured, a power source voltage is boosted by a charge pump and is supplied to first and second buffer amplifier.

Abstract: In a voltage monitoring apparatus, a capacitor circuit includes at least one capacitor. Input-side switches are connected to electrode terminals of at least one battery cell, and apply voltage to terminals of the capacitor. A voltage detection circuit includes a pair of voltage sensing terminals connected to terminals of the capacitor, and detects the potential difference across voltage sensing terminals. Output-side switches are connected to terminals of the capacitor, and apply voltage across terminals of the capacitor to the voltage sensing terminals. An impedance circuit is connected to the voltage sensing terminals. A stabilizing power circuit is connected to the voltage sensing terminals via the impedance circuit, and stabilizes voltage of the voltage sensing terminals. Based on the detected voltage when one of the output-side switches is turned on, an on-failure of the remaining output-side switches which should not be turned on are detected by a control unit.

Abstract: The present invention relates to an electric energy storage device such as a capacitor, a secondary battery, or the like, and more particularly, to an electric energy storage device capable of improving high output characteristics by using a voltage terminal The electric energy storage device according to an exemplary embodiment of the present invention includes a positive electrode and a negative electrode storing electric energy and a positive current terminal and a negative current terminal connected to the positive electrode and the negative electrode to apply current; and a positive voltage terminal and a negative voltage terminal connected to the positive electrode and the negative electrode to detect voltage across the positive electrode and the negative electrode, wherein the charging or discharging operation is controlled by using the detected voltage across the positive electrode and the negative electrode as control voltage.

Abstract: A battery monitoring system includes: plural battery monitoring devices that are serially connected to each other; and a control circuit connected to one battery monitoring device and that transmits a first activation signal to the one battery monitoring device, wherein each particular one of the plural battery monitoring devices includes: a constant voltage generation circuit that generates and outputs a constant voltage; a first activation circuit that outputs a second activation signal if the first activation circuit receives the first activation signal; and a second activation circuit that outputs a third activation signal in response to recognizing the constant voltage generated by the constant voltage generation of another of the battery monitoring devices that is connected to the particular battery monitoring device, and wherein the constant voltage generation circuit generates the constant voltage if the constant voltage generation circuit receives the second activation signal or the third activation

Abstract: An apparatus for balancing charge capacity of battery cell includes a voltage sensing/discharging circuit having a battery with cell group, a switching unit for selectively connecting both terminals of each battery cell to conductive lines, capacitor connected to the conductive lines, a voltage amplifying unit connected to both terminals of capacitor via a first switch, and a discharge resistance connected to both terminals of capacitor via a second switch; and a voltage balancing unit for controlling the switching unit in ON state of first switch to connect both terminals of each battery cell to the conductive lines and then sense voltage of each battery cell through the voltage amplifying unit, and controlling the switching unit in OFF state of first switch to charge voltage of balancing-requiring cell to the capacitor and then turning on the second switch to discharge charged voltage of capacitor through the discharge resistance.

Abstract: In a voltage detecting device, a control unit turns on first switches and fifth switches corresponding to a plurality of unit batteries of an assembled battery to charge electric charge to first capacitors. The control unit simultaneously turns off at least one of the first switches or the fifth switches to hold the electric charge in the first capacitors. While selecting one of the unit batteries in a predetermined order as a target unit battery for voltage detection, the control unit temporarily turns off a fourth switch to reset electric charge of a second capacitor, and then turns of second switches and third switches in a state where one of the first switches and one of the fifth switches corresponding to the target unit battery are kept in an off state, thereby to detect a voltage of the target unit battery.

Abstract: A battery monitoring apparatus a plurality of connection lines, a monitoring circuit, a first filter circuit, and a second filter circuit. The monitoring circuit is provided with a pair of sensing terminals for each pair of positive and negative electrode terminals of each of a plurality of battery cells of a battery pack. The plurality of connection lines includes a plurality of common line and first and second branch lines. The first filter circuit includes first resistors located on the first and second branch lines connected to the pair of sensing terminals, and a first capacitor located between the first and second branch lines connected to the pair of sensing terminals. The second filter circuit includes a second resistor located on the plurality of connection lines, and a second capacitor connected in series between the plurality of connection lines without passing through the first resistors and the second resistor.

Abstract: In accordance with one aspect of the present technique, a method is disclosed. The method includes identifying a first change in an excitation direction of a group of cells and determining a first set of characteristics of the group of cells corresponding to the first change. The method also includes identifying a second change in the excitation direction of the group of cells and determining a second set of characteristics of the group of cells corresponding to the second change. The second change in the excitation direction is opposite to the first change in the excitation direction. The method further includes determining a number of functional cells from the group of cells based on the first and the second set of characteristics.

Abstract: An operational amplifier with different power supply voltages includes an input stage and an output stage. The input stage includes a current source for providing a bias current, and a differential input circuit for receiving the bias current and differential input voltage signals, and converting the differential input voltage signal to differential input currents. The input stage is supplied by a first power supply voltage. The output stage includes a load circuit coupled to the differential input voltage signal and for receiving the differential input currents, and outputting a single ended output voltage signal. The output stage is supplied by a second power supply voltage. The second power supply voltage is lower than the first power supply voltage.

Abstract: A battery management system has battery cell management devices that correspond to battery modules in which a plurality of battery cells are connected in series, and a battery pack management device that corresponds to a battery pack in which the battery modules are connected in series. Each of the battery cell management devices detects a voltage of each of the battery cells via a first detection line connected to both electrodes of each of the battery cells, and transmits data indicating the voltage to the battery pack management device via a communication line.

Abstract: A method and apparatus to detect cell voltage of each of a plurality of battery cells in a rechargeable battery pack is disclosed. The method comprises generating a wave form with a positive phase and a negative phase by a current limited square wave generator. The wave form is a square wave having a maximum peak-to-peak voltage when the square wave generator is not loaded to be current limited. Then, sending the positive phase of the wave form to a first loop from a capacitor to the positive side of a battery cell. And, sending the negative phase of the wave form to a second loop from the negative side of the battery cell toward the capacitor. Finally, detecting a change of an electrical signal from the square wave generator. The voltage detection method and apparatus of this invention can be applied to detect whether a rechargeable battery cell has voltage lower than a low voltage limit or to measure the voltage of the battery cell in order to check its status.

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: System and methods for identifying a weak subdivision in a battery system are presented. In certain embodiments, a system may include a battery pack that includes multiple subdivisions. A measurement system may be configured to determine multiple subdivision electrical parameters associated with the subdivisions. A battery control system may identify a weakest subdivision based one on or more calculated derivative ratios of a subdivision electrical parameter associated with one subdivision of the battery pack relative to a subdivision electrical parameter associated with another subdivision.

Abstract: A power supply device includes battery units. Each unit includes a battery block, a voltage detector, a power supply circuit, and a disconnection detector. The block includes serially-connected battery cells. The voltage detector detects the cell voltages through voltage detection lines. The power supply circuit supplies power from the block to the voltage detector. The voltage detector is powered by electric power from the block. The disconnection detector detects disconnection of the lines based on the detected cell voltages. An unbalance resistor is connected to one of the blocks to increase power consumption of this block. Thus, a current flows in the line that is connected to a node between this block and an adjacent block connected next to this block.

Abstract: A battery monitoring system, comprises a battery state detection circuit that detects battery states of a plurality of battery cells that are connected in series, based on respective cell voltages of the plurality of battery cells, and a control circuit that monitors state of a battery cell, based on each cell voltage of the plurality of battery cells. The control circuit inputs pseudo voltage information to the battery state detection circuit, and thereby diagnoses whether or not the battery state detection circuit is operating normally.

Abstract: An apparatus for monitoring battery voltage and temperature includes a host controller and acquisition boards, and every acquisition board for the battery includes a voltage acquisition module, a temperature acquisition module, a host control chip MCU, A/D convertor module, an opto-isolator module, a CAN bus communication module and two external connection ports CN1, CN2. The input end of the AD transformation module is connected with the output end of the voltage acquisition module and the temperature acquisition module, and the output end of the A/D convertor module is connected with the opto-isolator module via a SPI bus, and the I/O port of the SPI bus module in the main control chip MCU is connected with the opto-couple isolation module, and the host control chip MCU is connected with the CAN bus communication module of the host controller via the CAN bus communication module, and the acquisition boards are connected via a socket piece in turn.

Abstract: In one embodiment, a circuit includes a measuring circuit coupled to an accumulator cell. A first output of the measuring circuit outputs a current signal based on a cell voltage of the accumulator cell. The circuit includes an interface circuit coupled to the first output of the measuring circuit and a second output of a level-shifter circuit configured to change a voltage level on the first output at the interface circuit. The level-shifter circuit includes a first input coupled to the first output and one or more transistors coupled in series with one or more gate terminals that are each coupled to each of one or more terminals of the accumulator cell.

Abstract: A system and method for identifying and responding to exceptional charge events of series-connected energy storage elements.

Abstract: A high voltage service disconnect assembly is provided. The battery pack has an enclosure, first and second battery modules, and positive and negative pack voltage terminals. The assembly includes a housing securing first and second conductive pins thereon. The first conductive pin is coupled to a negative voltage terminal of the first battery module. The second conductive pin is coupled to a positive voltage terminal of the second battery module. The assembly further includes a detection circuit electrically coupled to the first and second conductive pins. The detection circuit outputs a first isolation resistance fault signal when a first isolation resistance fault is detected between the negative pack voltage terminal and the enclosure.

Abstract: A battery monitoring apparatus monitors a battery pack configured by a plurality of battery cells. The battery monitoring apparatus includes a main monitoring unit, a sub monitoring unit and a control unit. The main monitoring unit monitors a plurality of physical quantities indicating a battery state of the battery pack. The sub monitoring unit monitors a part of the physical quantities separately from the main monitoring unit. The control unit detects malfunction of the battery pack on the basis of at least one of a monitoring result of the main monitoring unit and a monitoring result of the sub monitoring unit.

Abstract: A method of repairing a used battery pack from an electric vehicle include removing the battery pack from the vehicle. Battery tests are performed on at least some of the plurality of batteries and a battery test result for each of the batteries tested are obtained and stored in a database. A plurality of replacement batteries are tested and test results for each of the replacement batteries are stored in the database. The battery test results from the database are retrieved and used to create a refurbished battery pack. An apparatus includes a database for storing test results.

Abstract: Modeling and testing are used to characterize consequences of a first lithium-ion cell having an internal short. The vulnerability of a second lithium-ion cell being induced into thermal runaway by the energy released by the first cell undergoing an internal short is quantified. Characteristics of the packaging of Li-ion cells within a battery pack are analyzed. Combined, these analyses determine the robustness required of a cell in order to withstand a nearby cell's internal short given that the battery is maintained within the specified operational envelope by a BMS and this envelope is modified in real-time as required to meet the safety requirement. Robustness factors are: age, history of charging/discharging, as well as immediate state of charge and environment. In operation, the cell's operational history is incorporated into a model. When the model indicates cell robustness at a predetermined lower limit, operation of the cell is ceased or limited.

Abstract: Provided is a secondary battery management system and method for exchanging information in a multi-pack parallel structure using the same, and more particularly, to a secondary battery management system and method for exchanging information in a multi-pack parallel structure using the same, including: a unit battery cell; a battery module in which a plurality of unit battery cells are disposed; and a voltage temperature management system (VTMS) generates a state information and generates a diagnosis information of battery module or the unit battery cells using unit battery cell information for the unit battery cells.

Abstract: A voltage detection apparatus includes an operational amplifier, first and second switches coupled between a terminal of a detection target voltage source and a common node, a first capacitor including a plurality of capacitor elements coupled in series between the common node and an inverting input terminal of the operational amplifier, a third switch and a second capacitor, which are coupled between the inverting input terminal and an output terminal of the operational amplifier, a reference voltage selection circuit which applies one of a first reference voltage and a second reference voltage differing from one another to a non-inverting input terminal of the operational amplifier, and a controller which is capable of selecting a voltage detection mode and a self-diagnostic mode.

Abstract: An anti-fake battery pack and an identification system thereof has a casing and multiple battery cells, each of which as a battery body, an inner identifier mounted outside the battery body, a protection layer mounted around outside of the battery body and the outer identifier formed on the protection layer. An external identifying device has to read a first and second identification codes from the inner and outer identifiers to determine whether the battery cell is authentic or not. In addition, the inner identifier is covered by the protection layer, so the inner identifier can not stolen without breaking the protection layer with the outer identifier. Therefore, the identifying system provides double identifying procedures to increase security of identification and decrease the possibility of copying the first and second identification codes.

Abstract: A signal processor includes: a plurality of first capacitors provided for respective output terminals of a plurality of multiplexers, the first capacitors having their one ends connected to the respective output terminals of the multiplexers, the first capacitors being charged in accordance with voltages outputted from the respective output terminals; a differential amplifier including an input terminal connected to the other ends of the first capacitors; a second capacitor connected between the input terminal and an output terminal of the differential amplifier; and a second switch connected parallel to the second capacitor. First switches included in at least one of the plurality of multiplexers are configured as high-voltage switches that allow operation at a voltage higher than an operating voltage of first switches included in the other multiplexer or multiplexers.

Abstract: A voltage measuring apparatus is configured to measure voltages of respective battery cells of a battery cell array including a plurality of battery cell groups each including a predetermined number of battery cells connected in series. The voltage measuring apparatus includes a plurality of measuring units each provided for each of the battery cell groups. The adjacent measuring units are connected through a communication channel so as to perform current communication therebetween. A bidirectional diode circuit element is connected to the communication channel extending between the adjacent measuring units.

Abstract: A voltage monitoring device monitors voltage of a battery pack having a plurality of battery cells connected in series. This device is provided with a capacitor circuit including a pair of independent terminals, a plurality of capacitors connected in series between the pair of independent terminals, and at least one connecting terminal arranged between adjacent capacitors of the capacitors. In the device, first input-side switches connect the pair of independent terminals to first electrode terminals of the battery cells, and second input-side switches connect the connecting terminal to second electrode terminals among the electrode terminals other than the first electrode terminal. The first electrode terminals are arranged at a predetermined interval that covers a predetermined number of the electrode terminals corresponding to the number of the connecting terminal. The number of the second input-side switches is less than the number of the electrode terminals other than the first electrode terminals.

Abstract: A system for determining an isolation resistance is provided. The system includes a voltage source that applies an output voltage level between first and second electrical terminals of a battery pack. The system further includes a voltage meter that measures a first voltage level between the first electrical terminal and a vehicle chassis, and measures a second voltage level between the first electrical terminal and the vehicle chassis when a resistor is coupled between the first electrical terminal and the vehicle chassis. The voltage meter measures a third voltage level between the second electrical terminal and the vehicle chassis. The system further includes a microprocessor that determines a first isolation resistance value based on the first, second, third voltage levels and the predetermined resistance level.

Abstract: A voltage measurement circuit including a current mirror having an input branch in series with a first resistive element between first and second nodes of application of said voltage, and having an output branch providing a current representative of said voltage.

Abstract: Device to monitor the voltage of battery cells. The device includes a control device, voltage taps configured to tap the voltages of the battery cells, a holding plate having a first holding plate part and a second holding plate part, and a stamped-out circuit having measuring lines configured to electrically connect the control device to the voltage taps, the stamped-out circuit being arranged in cut-outs of the first holding plate part and the cut-outs being covered by the second holding plate such that the measuring lines are fixedly positioned in the cut-outs.

Abstract: A battery condition estimating apparatus for a battery pack having a plurality of battery cells connected in series includes an analog channel switching circuit and a battery gas gauge circuit. The analog channel switching circuit has a plurality of input ports and an output port, wherein the input ports are coupled to the battery cells via a plurality of analog channels, respectively, and the analog channel switching circuit is arranged to couple the output port to a selected input port of the input ports for allowing the output port N5 to be coupled to a selected battery via a selected analog channel. The battery gas gauge circuit is coupled to the output port of the analog channel switching circuit, and used for estimating a battery condition of the battery pack by monitoring the selected battery cell via the selected analog channel.

Abstract: Provided is a technique that contributes to the improvement of voltage measurement accuracy and uniform current consumption of a battery in a voltage measurement device. Switch circuits (SWP and SWN) include switch elements (MP1 and MP2 or MN1 and MN2) which are provided between an input terminal and an output terminal, and switch driving units (401 to 409) which are driven between a first power supply voltage (VCC or GND) and a second power supply voltage (GND or VCC), which are different from each other, with an input voltage interposed therebetween.