JP2013238480A - Voltage detector of battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voltage detector of a battery pack capable of reducing costs by applying the battery pack as a power source, and detecting voltage between electrodes of a battery module while suppressing energy consumption of the battery pack.SOLUTION: A voltage detector of a battery pack includes: a plurality of power supply units 12, 22, 32,..., n2 supplying power from a battery pack EG to photocouplers X1, X2, X3, ..., Xn; and a plurality of voltage detection units 13, 23, 33, ..., n3 detecting voltage between electrodes of one or more battery modules E1, E2, E3, ..., En and transmitting the detection result to an MPU 100 (signal processor). The voltage detector includes off timers 11, 21, 31, ..., n1 (supply limitation units) for limiting power supplied from the battery pack EG to at least one of the power supply units 12, 22, 32, ..., n2, the voltage detection units 13, 23, 33, ..., n3, and the photocouplers X1, X2, X3, ..., Xn to a predetermined period.

Description

  The present invention relates to an assembled battery in which a plurality of battery modules are connected in cascade, and detects the inter-electrode voltage of one or more of the battery modules, and transmits the inter-electrode voltage to the signal processing device via an insulated signal transmission component. The present invention relates to a battery voltage detection device.

  Conventionally, the open-circuit module voltage can be detected with higher accuracy, the unnecessary life shortening of the high-voltage assembled battery can be avoided, and the module voltage can be stably detected despite large fluctuations in the running power storage state. An example of a technique related to a target voltage detection apparatus for an assembled battery for an electric vehicle is disclosed (for example, see Patent Document 1). This assembled battery voltage detection device for an electric vehicle is different from each other and uses DC-powered circuit operation power of a module voltage detection circuit unit for processing a high potential from an auxiliary battery instead of a main battery to incorporate an input / output insulation transformer. In this configuration, power is supplied via a DC converter.

Japanese Patent No. 3395952

  However, in the voltage detection device for an assembled battery for an electric vehicle described in Patent Document 1, in detecting the voltage of the assembled battery (that is, the potential difference between positive and negative electrodes) and transmitting it to the microcomputer, a differential voltage detection circuit, Power is always supplied to all of the A / D conversion circuit and the photocoupler element. The power source of the power source is an auxiliary battery and is required separately from the assembled battery. Not only is the cost high in that two types of batteries are required, but there is also a running cost for preventing the power supplied by the auxiliary battery from being lowered and becoming undetectable.

  If the assembled battery is applied as the power source, the auxiliary battery becomes unnecessary and the running cost is eliminated. However, it is necessary to always supply power regardless of the use / non-use of each differential voltage detection circuit, each A / D conversion circuit, and each photocoupler element. Therefore, there is a problem that the energy of the assembled battery is wasted (consumed).

  The present invention has been made in view of the above points, and is a set that can reduce the cost by applying an assembled battery as a power source and can detect the voltage between electrodes of the battery module while suppressing the energy consumption of the assembled battery. It aims at providing the voltage detection apparatus of a battery.

  The invention made in order to solve the above-described problem is that an assembled battery in which a plurality of battery modules are connected in cascade is connected to a power source (electric power) from the assembled battery in order to communicate with the signal processing device via an insulated signal transmission component. Including the meaning, the same shall apply hereinafter) to the insulated signal transmission component, and a plurality of power supply units that detect the voltage between the electrodes of the one or more battery modules and transmit the voltage to the signal processing device. In a voltage detection apparatus for an assembled battery having a voltage detection unit, the power supplied from the assembled battery to at least one of the power supply unit, the voltage detection unit, and the insulated signal transmission component is limited to a predetermined period. It has a supply restriction part.

  According to this configuration, the power that is supplied from the assembled battery to the power supply unit, the voltage detection unit, and the insulated signal transmission component is limited to a predetermined period by the supply limiting unit. Since the assembled battery is applied as the power source, the auxiliary battery as in the prior art becomes unnecessary, and the cost can be reduced. Since it is not always necessary to supply power, the energy consumption of the assembled battery can be suppressed.

  The “battery module” may be called a battery cell. The “voltage between the electrodes of one or more battery modules” refers to the potential difference between the positive electrode and the negative electrode of the battery module for one battery module, and both ends of the cascaded battery modules for two or more battery modules. This corresponds to the potential difference between the positive electrode and the negative electrode of the battery module. The “insulated signal transmission component” is arbitrary as long as it is a component capable of transmitting a signal while ensuring insulation. For example, one or more of photocouplers, transformers, photoMOSs, isolation amplifiers, resistors, capacitors, and the like are applicable. The “supply limiting unit” may be arbitrarily configured as long as power supply can be limited to a predetermined period. For example, one or more of a timer, a programmable logic controller, a pulse generator (such as a multivibrator), and the like are applicable.

It is a schematic diagram which shows the 1st structural example of the voltage detection apparatus of an assembled battery. It is a flowchart which shows the example of a procedure of a supply restriction process. It is a flowchart which shows the example of a procedure of an operation stop process. It is a time chart which shows a time-dependent change about the OFF timer and photocoupler based on a detection command signal. It is a schematic diagram which shows the 2nd structural example of the voltage detection apparatus of an assembled battery. It is a schematic diagram which shows the 3rd structural example of the voltage detection apparatus of an assembled battery. It is a schematic diagram which shows the 4th structural example of the voltage detection apparatus of an assembled battery.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Note that unless otherwise specified, “connecting” means electrically connecting. Each figure shows elements necessary for explaining the present invention, and does not necessarily show all actual elements. When referring to directions such as up, down, left and right, the description in the drawings is used as a reference.

[Embodiment 1]
The first embodiment will be described with reference to FIGS. The voltage detection device shown in FIG. 1 has a function of detecting the voltage between the electrodes of the assembled battery EG and transmitting it to the MPU 100. The assembled battery EG includes a plurality of battery modules, that is, battery modules E1, E2, E3,. Each battery module may be a single battery module, a plurality of battery modules connected in cascade, or a mixture of these.

  , N1, power supply units 12, 22, 32,..., N2, voltage detection units 13, 23, 33,..., N3, photocouplers X1, X2, and so on. X3,..., Xn, etc. The OFF timers 11, 21, 31,..., N1 have the same configuration, and each corresponds to a “supply limiting unit”. The power supply units 12, 22, 32,..., N2 have the same configuration. The voltage detectors 13, 23, 33,..., N3 have the same configuration. The photocouplers X1, X2, X3,..., Xn have the same configuration, and each corresponds to an “insulated signal transmission component”. The MPU 100 corresponds to a “signal processing device”.

  That is, the voltage detection device of this embodiment has a configuration including n sets of an OFF timer, a power supply unit, a voltage detection unit, and a photocoupler. n is an integer greater than or equal to 2 and is appropriately set according to each rated voltage of the battery modules E1, E2, E3,. In the following, for the sake of simplicity, a description will be given of a set of the OFF timer 11, the power supply unit 12, the voltage detection unit 13, and the photocoupler X1 as a representative.

  The photocoupler X1 has a light receiving semiconductor Q1 and a light emitting diode D1, and operates by receiving power supplied from the power supply unit 12. In order to perform signal transmission while ensuring insulation, the light receiving semiconductor Q1 is disposed in a high voltage system, and the light emitting diode D1 is disposed in a low voltage system. The light emitting diode D1 emits light based on a signal output from the MPU 100, and the light receiving semiconductor Q1 receives the light, converts it into a detection command signal Sc, and transmits it to the voltage detector 13. The detection command signal Sc includes a “communication command” (see FIG. 2).

  The voltage detection unit 13 detects the voltage between the electrodes of the battery module E1 (that is, the potential difference between the positive electrode and the negative electrode; the same applies hereinafter) and outputs a voltage detection signal Sd1. The detection of the voltage between the electrodes is performed based on a detection command signal Sc transmitted from the light receiving semiconductor Q1. Specifically, when the information for specifying the voltage detection unit 13 is included in the detection command signal Sc, the voltage between the electrodes of the battery module E1 is detected, and other voltage detection units (for example, the voltage detection units 23, 33, ..., n3, etc.) is not included, the inter-electrode voltage of the battery module E1 is not detected. Moreover, the voltage detection part 13 outputs the operation stop signal Sf1 with respect to the OFF timer 11, when detecting the voltage between electrodes of the battery module E1 (including the meaning of transmission. The same is true hereinafter). The method of realizing the voltage detection unit 13 is arbitrary, and may be a hardware configuration such as an IC or a software configuration in which the CPU executes a program.

  The OFF timer 11 limits the power supplied from the battery module E1 to the photocoupler X1 for a predetermined period. The predetermined period may be a fixed period regardless of the operation stop signal Sf1, or may be an indefinite period based on on / off of the operation stop signal Sf1. In the present embodiment, based on the operation stop signal Sf1 transmitted from the voltage detection unit 13, a stop period Tb from when the OFF timer 11 is turned on (ON) until it is turned off (OFF) is applied (see FIG. 4). reference).

  The power supply unit 12 supplies power from the battery module E1 to the photocoupler X1 via the OFF timer 11. It is possible to arbitrarily set in what state the OFF timer 11 supplies power to the photocoupler X1. In this embodiment, power is supplied when the OFF timer 11 is off, and no power is supplied when it is on.

  .., N1, power supply units 12, 22, 32,..., N2, voltage detection units 13, 23, 33,..., N3, photocouplers X1, X2 , X3,..., Xn, a photocoupler Xv is provided to transmit the voltage detection signals Sd1, Sd2, Sd3,.

  The photocoupler Xv has a light receiving semiconductor Qv and a light emitting diode Dv, and operates by receiving power from a high voltage power source Vcc. Like the photocouplers X1, X2, X3,..., Xn, signal transmission is performed while ensuring insulation, so that the light emitting diode Dv is disposed in the high voltage system and the light receiving semiconductor Qv is disposed in the low voltage system. The light emitting diode Dv emits light based on the voltage detection signals Sd1, Sd2, Sd3,..., Sdn, and the light receiving semiconductor Qv receives the light, converts it to the voltage detection signal Sv, and transmits it to the MPU 100. The voltage detectors 13, 23, 33,..., N3 and the light emitting diode Dv may be directly connected as illustrated, or a multiplexer, a buffer, an OR circuit, or the like may be interposed. The MPU 100 performs necessary processing based on the voltage detection signal Sv. The required processing can be set arbitrarily.

  A procedure example in the above-described assembled battery voltage detection apparatus will be described with reference to FIGS. FIG. 2 is an example of a supply restriction process executed by each of the voltage detection units 13, 23, 33,..., N3. FIG. 3 is an example of an operation stop process executed by each of the OFF timers 11, 21, 31,..., N1. The implementation method is arbitrary, and may be a hardware configuration such as a gate circuit or a software configuration in which the CPU executes a program.

  In the supply restriction process shown in FIG. 2, first, a communication command included in the detection command signal Sc is received [step S10]. Next, the communication command received in step S10 detects and transmits the voltage detection command, that is, the voltage between the electrodes of the target battery module (that is, the corresponding battery module among the battery modules E1, E2, E3,..., En). It is determined whether or not an instruction to perform is received [step S11]. If the communication command is a voltage detection command (YES), the voltage between the electrodes of the target battery module is detected and transmitted [step S13], and the process returns to step S10. On the other hand, if the communication command is not a voltage detection command (NO in step S11), an operation stop signal that is turned on for a certain time (that is, a stop period Tb shown in FIG. 4 described later) is output to the corresponding OFF timer [step S12. ], The process returns to step S10.

  In the operation stop process shown in FIG. 3, first, it is determined whether or not an operation stop signal that is turned on for a predetermined time is received from the voltage detection unit [step S20]. If no signal to turn on for a certain time is received from the voltage detector (NO), step S20 is repeated until the signal is received. On the other hand, when an operation stop signal Sf1 that is turned on for a certain period of time is received from the voltage detection unit (YES), a signal that stops the corresponding power supply unit (that is, a supply stop signal St1, St2, St3,..., Stn shown in FIG. Among them, the corresponding supply stop signal is turned on) (step S21). Then, after waiting for a certain time [step S22], a corresponding supply stop signal among the signals for operating the corresponding power supply units (that is, among supply stop signals St1, St2, St3,..., Stn shown in FIG. 4 described later) Is output [step S22], and the process returns to step S20 in preparation for the next operation stop signal.

  In the assembled battery voltage detection apparatus configured as described above, an example of one-cycle operation will be described with reference to FIG. 4, in order from the top, the detection command signal Sc, the supply stop signal St1 output from the OFF timer 11, the supply stop signal St2 output from the photocoupler X1, the OFF timer 21, the supply output from the photocoupler X2, and the OFF timer 31. The stop signal St3, the photocoupler X3,..., The supply stop signal Stn output from the OFF timer n1, and the operating state of the photocoupler Xn are shown with time. In addition, about each photocoupler, in order to make power consumption accompanying operation | movement easy to understand, it attaches and shows.

  The detection command signal Sc transmitted from the MPU 100 from time t11 to time t13 includes a command for detecting and transmitting the voltage between the electrodes of the battery module E1. Receiving this detection command signal Sc, the voltage detector 13 does not output the operation stop signal Sf1, and the other voltage detectors 23, 33,..., N3 output the operation stop signals Sf2, Sf3,. Therefore, the OFF timer 11 outputs the supply stop signal St1 while the operation stop signal Sf1 remains off, and the other OFF timers 21, 31,..., N1 output the operation stop signals Sf2, Sf3,. To do. Therefore, the photocouplers X2, X3,..., Xn for which the operation stop signals Sf2, Sf3,..., Sfn are turned on are stopped for the stop period Tb.

  The operation stop signals Sf2, Sf3,..., Sfn are turned on at time t12 and then turned off at time t14. The response delay period Ta from time t11 to time t12 includes response delays until the operation stop signals Sf2, Sf3,..., Sfn are output from the voltage detection units 23, 33,. This is because a response delay occurs until the supply stop signals St2, St3,..., Stn are output from. Although it is desirable that the response delay period Ta is ideally 0, in reality it is not a little. In order to suppress the power consumption of the photocouplers X2, X3,..., Xn, the response delay period Ta is designed to be short. Further, the no-signal period Tc from time t14 to time t21 is a period in which the photocouplers X2, X3,..., Xn are not operated and the detection command signal Sc is not transmitted from the MPU 100. In order to suppress power consumption by the photocouplers X2, X3,..., Xn, it is assumed that the operation of the photocouplers X2, X3,..., Xn can be recovered before the next detection command signal Sc is transmitted. It is desirable to secure the period Tc as long as possible. The response delay period Ta and the no-signal period Tc are the same after time t21.

  The detection command signal Sc transmitted from the MPU 100 from time t21 to time t23 includes a command for detecting and transmitting the voltage between the electrodes of the battery module E2. Receiving the detection command signal Sc, the voltage detector 23 does not output the operation stop signal Sf2, and the other voltage detectors 13, 33,..., N3 output the operation stop signals Sf1, Sf3,. Therefore, the OFF timer 21 outputs the supply stop signal St2 while the operation stop signal Sf2 remains off, and the other OFF timers 11, 31,..., N1 output the operation stop signals Sf1, Sf3,. To do. Therefore, the photocouplers X1, X3,..., Xn for which the operation stop signals Sf1, Sf3,..., Sfn are turned on are stopped for the stop period Tb.

  The detection command signal Sc transmitted from the MPU 100 from time tn1 to time tn3 includes a command to detect and transmit the voltage between the electrodes of the battery module En from time t31 to time tn1. The voltage detector n3 that has received the detection command signal Sc does not output the operation stop signal Sfn, and the other voltage detectors 13, 23,... Output the operation stop signals Sf1, Sf2,. Accordingly, the OFF timer n1 outputs the supply stop signal Stn while the operation stop signal Sfn remains off, and the other OFF timers 11, 21,... Turn on the operation stop signals Sf1, Sf2,. Therefore, the photocouplers X1, X2,... For which the operation stop signals Sf1, Sf2,.

  According to the above operation, from time t12 to time t14, from time t22 to time t24, from time t32 to time t34, ..., from time tn2 to time tn4, only one photocoupler operates and other photocouplers operate. The coupler does not work. Accordingly, the power consumption of the entire photocouplers X1, X2, X3,.

  According to the first embodiment described above, the following effects can be obtained.

  (1) In the assembled battery voltage detection device, OFF timers 11, 21, 31,..., N1 (supply restriction) for restricting the power supplied from the assembled battery EG to the photocouplers X1, X2, X3,. Part) (see FIGS. 1 to 4). According to this configuration, the power supplied from the assembled battery EG to the photocouplers X1, X2, X3,..., Xn is limited to a predetermined period by the OFF timers 11, 21, 31,. Since the assembled battery EG is applied as the power source, the auxiliary battery as in the conventional technique is not necessary, and the cost can be reduced. Since it is not always necessary to supply power, the energy consumption of the assembled battery EG can be suppressed. Although not shown, the power supplied from the assembled battery EG is also limited to a predetermined period for the power supply units 12, 22, 32,..., N2 and the voltage detection units 13, 23, 33,. However, the same effect can be obtained.

  (2) The OFF timers 11, 21, 31,..., N1 are transmitted from the assembled battery EG based on the detection command signal Sc (signal) transmitted from the MPU 100 via the photocouplers X1, X2, X3,. The power supplied to the photocouplers X1, X2, X3,..., Xn is limited (see FIGS. 1 and 4). According to this configuration, since the power supplied to the photocouplers X1, X2, X3,..., Xn is restricted based on the detection command signal Sc, the restriction can be controlled easily and reliably.

  (4) The OFF timers 11, 21, 31,..., N1 are the one or more power supply units 12, 22, 32,..., N2 among the plurality of power supply units 12, 22, 32,. The power supply to the photocouplers X1, X2, X3,..., Xn is stopped (see FIGS. 1 and 4). However, the supply of power to the photocouplers X1, X2, X3,..., Xn is not stopped. According to this configuration, the overall power consumption can be suppressed to the extent that the power supplied to the photocouplers X1, X2, X3,.

  (5) When the OFF timers 11, 21, 31,..., N1 do not detect a predetermined signal transmitted from the MPU 100, the power supplied from the assembled battery EG to the photocouplers X1, X2, X3,. The configuration is not limited (see FIGS. 1 and 4). According to this configuration, even when the OFF timers 11, 21, 31,..., N1 malfunction and the supply stop signals St1, St2, St3,. Communication with the detectors 13, 23, 33,..., N3 is continued. Therefore, it is possible to prevent the MPU 100 and the voltage detectors 13, 23, 33,..., N3 from having a communication failure due to the primary failure of the OFF timers 11, 21, 31,.

[Embodiment 2]
The second embodiment will be described with reference to FIG. The configuration and the like of the assembled battery voltage detection device are the same as those in the first embodiment, and the second embodiment will be described with respect to differences from the first embodiment in order to simplify the illustration and description. Therefore, the same elements as those used in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  The voltage detection device for the assembled battery shown in FIG. 5 includes the OFF timers 11, 21, 31,..., N1 in the voltage detection units 13, 23, 33,. Different from the detection device. Specifically, both functions of the voltage detection unit and the OFF timer are realized by a gate circuit, or a circuit that realizes both functions is configured on one substrate.

  Since the voltage detectors 13, 23, 33,..., N3 are provided with the OFF timers 11, 21, 31,..., N1, respectively, it is not necessary to transmit the operation stop signals Sf1, Sf2, Sf3,. Therefore, the response delay accompanying the transmission of the operation stop signals Sf1, Sf2, Sf3,..., Sfn can be suppressed (see the response delay period Ta in FIG. 4).

  According to the second embodiment described above, the following effects can be obtained. About the other, the effect similar to Embodiment 1 can be acquired.

  (3) The OFF timers 11, 21, 31,..., N1 are provided in the power supply units 12, 22, 32,..., N2, respectively (see FIG. 5). According to this configuration, since the number of parts can be reduced, the number of work steps required for manufacturing the assembled battery voltage detection device can be reduced.

[Embodiment 3]
The third embodiment will be described with reference to FIG. The configuration of the assembled battery voltage detection device is the same as that of the first embodiment, and in order to simplify the illustration and description, the third embodiment will be described with respect to differences from the first embodiment. Therefore, the same elements as those used in Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

  The assembled battery voltage detecting device shown in FIG. 6 includes the OFF timers 11, 21, 31,..., N1 in the power supply units 12, 22, 32,. Different from the detection device. Specifically, both functions of the power supply unit and the OFF timer are realized by a gate circuit, or a circuit that realizes both functions is configured on one substrate.

  Since the power supply units 12, 22, 32,..., N2 include the OFF timers 11, 21, 31,..., N1, respectively, it is not necessary to transmit the supply stop signals St1, St2, St3,. Therefore, the response delay accompanying transmission of the supply stop signals St1, St2, St3,..., Stn can be suppressed (see the response delay period Ta in FIG. 4).

  According to Embodiment 3 described above, the following effects can be obtained. About the other, the effect similar to Embodiment 1 can be acquired.

  (3) The OFF timers 11, 21, 31,..., N1 are provided in the power supply units 12, 22, 32,..., N2, respectively (see FIG. 5). According to this configuration, since the number of parts can be reduced, the number of work steps required for manufacturing the assembled battery voltage detection device can be reduced.

[Other Embodiments]
Although the form for implementing this invention was demonstrated according to Embodiment 1-3 in the above, this invention is not limited to the said form at all. In other words, various forms can be implemented without departing from the scope of the present invention. For example, the following forms may be realized.

  In the first to third embodiments described above, the photocouplers X1, X2, X3,..., Xn are applied as the insulated signal transmission components (see FIGS. 1, 5, and 6). Instead of (or in addition to) this form, another insulated signal transmission component capable of transmitting a signal while ensuring insulation may be applied. Other insulated signal transmission components include, for example, a transformer, a photo MOS, an isolation amplifier, a resistor, a capacitor, and the like. Even when other insulating signal transmission components are applied, signals can be transmitted while ensuring insulation, and the same effects as those of the first to third embodiments can be obtained.

  In the first to third embodiments described above, the OFF timers 11, 21, 31,..., N1 are applied as the supply restricting unit (see FIGS. 1, 5, and 6). Instead of (or in addition to) this form, another supply restriction unit that can restrict the supply of power to a predetermined period may be applied. Other supply restriction units correspond to, for example, a programmable logic controller, a pulse generator (multivibrator, etc.), and the like. Even when another supply restriction unit is applied, the supply of power can be restricted to a predetermined period, and the same effects as those of the first to third embodiments can be obtained.

  In the first to third embodiments described above, the MPU 100 is applied as a signal processing device (see FIGS. 1, 5, and 6). Instead of this form, a detection command signal Sc is output to the voltage detection units 13, 23, 33,..., N3, and the voltage detection signals Sd1, Sd2, and n3 are output from the voltage detection units 13, 23, 33,. Other signal processing devices that input Sd3,..., Sdn may be applied. The other signal processing device corresponds to, for example, a computer, an ECU, or the like. Even when other signal processing apparatuses are applied, signals can be input and output, and the same effects as those of the first to third embodiments can be obtained.

  In the first to third embodiments described above, the light-emitting diodes D1, D2, D3,..., Dn are arranged in a low voltage system for the photocouplers X1, X2, X3,. , Qn are arranged in a high-pressure system (see FIGS. 1, 5 and 6). Instead of this configuration, the light receiving semiconductors Q1, Q2, Q3,..., Qn may be arranged in a low voltage system, and the light emitting diodes D1, D2, D3,. An example of this arrangement is shown in FIG. In the configuration example of FIG. 7, in order to transmit the detection command signal Sc to the voltage detectors 13, 23, 33,..., N3, the photo diode having the light emitting diode Dv arranged in the low voltage system and the light receiving semiconductor Qv arranged in the high voltage system. A coupler Xv is provided. Even in this configuration example, the detection command signal Sc can be transmitted to the voltage detectors 13, 23, 33,..., N3, and the inter-electrode voltage of the target battery module can be detected to detect the photocouplers X1, X2, and so on. It can be transmitted to the MPU 100 through X3,. The configuration example of FIG. 7 corresponds to the configuration example of FIG. 1, but the configuration examples of FIGS. 5 and 6 can be similarly handled. Therefore, the same effects as those of the first to third embodiments described above can be obtained.

11, 21, 31,..., N 1 timers 12, 22, 32,..., N 2 power supply units 13, 23, 33, ..., n 3 voltage detection units X 1, X 2, X 3,. E2, E3, ..., En battery module

Claims (5)

A plurality of power supply units that supply power from the assembled battery to the insulated signal transmission component in order to communicate with the signal processing device via the insulated signal transmission component for the assembled battery in which a plurality of battery modules are connected in cascade And a voltage detection device for an assembled battery having a plurality of voltage detection units that detect a voltage between the electrodes of the one or more battery modules and transmit the voltage to the signal processing device.
A voltage of the assembled battery, comprising: a supply limiting unit that restricts the power supplied from the assembled battery to one or more of the power supply unit, the voltage detection unit, and the insulated signal transmission component for a predetermined period. Detection device.   The supply restriction unit restricts the power supplied from the assembled battery to the insulated signal transmission component based on a signal transmitted from the signal processing device via the insulated signal transmission component. The assembled battery voltage detecting device according to claim 1.   The assembled battery voltage detection device according to claim 1, wherein the supply restriction unit is provided in one or both of the power supply unit and the voltage detection unit.   The said supply restriction | limiting part stops supplying the said power supply to the said insulated signal transmission component about one or more power supply parts among these several power supply parts. The voltage detection apparatus of the assembled battery as described in any one.   The power supply restriction unit does not restrict the power supply supplied from the assembled battery to the insulated signal transmission component when a predetermined signal transmitted from the signal processing device is not detected. The voltage detection apparatus of the assembled battery as described in any one of 1-4.

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