Power storage device, control method, and control program

Abstract

To provide a power storage device capable of setting identification information while simplifying a construction for monitoring a battery.SOLUTION: A power storage device comprises: a plurality of detection parts that is connected to a battery pack including a plurality of batteries serially connected, measures each voltage of the plurality of batteries, and detects a separation of the nth battery (n is 1 or more natural numbers) in the plurality of batteries when the voltage to be measured is changed to a specific value or larger from the battery pack; and a distribution part that separates each of the plurality of batteries sequentially one by one from the battery part, and distributes an address to be set to the specified detection part that the voltage of the nth battery to be separated from the battery pack is measured in the plurality of detection parts to all of the plurality of detection parts. The specified detection part sets the address to be received when each battery is separated from the battery pack to the specified detection part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a power storage device, a control method, and a control program.

Background Art

[0002] Patent Document 1 discloses a technique for generating identification information of a battery pack. In the technique of Patent Document 1, a monitoring unit that monitors the terminal voltages at both ends of a plurality of batteries included in the battery pack generates identification information for identifying the battery pack based on the voltages, and sets the identification information in the monitoring unit. The monitoring unit has a plurality of input terminals, and inputs the voltage of each battery via a plurality of electrical wirings and the input terminals.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, conventionally, since a plurality of input terminals are used to set the identification information, the circuit configuration may become complicated. Thus, there is room for improvement in setting the identification information in the prior art.

[0005] An object of the present disclosure is to provide a power storage device, a control method, and a control program that set identification information while simplifying the circuit configuration in view of the above circumstances.

Means for Solving the Problems

[0006] To solve the above problems, the energy storage device according to the present disclosure is connected to a battery pack including a plurality of batteries connected in series, measures the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, among the plurality of batteries, a plurality of detection units that detect that the nth (n is a natural number of 1 or more) battery has been disconnected from the battery pack, and each of the plurality of batteries is sequentially disconnected from the battery pack one by one, and an address for setting a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units is distributed to all of the plurality of detection units. The specific detection unit sets the address received when detecting that the battery has been disconnected from the battery pack to the specific detection unit.

[0007] The control method according to the present disclosure is such that at least one processor is connected to a battery pack including a plurality of batteries connected in series, measures the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, among the plurality of batteries, a plurality of detection units that detect that the nth (n is a natural number of 1 or more) battery has been disconnected from the battery pack, and each of the plurality of batteries is sequentially disconnected from the battery pack one by one, and controls a distribution unit that distributes an address for setting a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units to all of the plurality of detection units, and executes a process of setting the address received when detecting that the battery has been disconnected from the battery pack to the specific detection unit.

[0008] The control program according to the present disclosure is connected to a battery pack including a plurality of batteries connected in series to at least one processor, measures the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, among the plurality of batteries, a plurality of detection units that detect that the nth battery (n is a natural number of 1 or more) has been disconnected from the battery pack, and each of the plurality of batteries is sequentially disconnected from the battery pack one by one, and an address for setting a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units is distributed to all of the plurality of detection units, and when it is detected that the battery has been disconnected from the battery pack, the received address is set in the specific detection unit, and the process is executed.

Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a power storage device, a control method, and a control program that set identification information while simplifying the configuration for monitoring batteries.

Brief Description of the Drawings

[0010]

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MODE FOR CARRYING OUT THE INVENTION

[0011] Hereinafter, embodiments will be described with reference to the drawings. In addition, the same or similar reference numerals are assigned to the same functions and configurations, and the description thereof will be omitted as appropriate.

[0012] (Embodiment) FIG. 1 is a diagram showing a configuration example of a power storage device according to an embodiment of the present disclosure. The power storage device 100 may be interpreted as a device that monitors the state of each of a plurality of batteries included in the battery pack 200 and identifies a battery in which a defect has occurred. The power storage device 100 may set identification information in each of a plurality of detection units 4 in order to identify each of the plurality of batteries included in the battery pack 200. By setting different identification information in each of the plurality of detection units 4, the position of the battery to be monitored by the detection unit 4, that is, the position of each of the plurality of batteries included in the battery pack 200, can be identified. Each of the plurality of batteries included in the battery pack 200 may be interpreted as a battery cell, may be interpreted as a battery stack including a plurality of battery cells inside, or may be interpreted as a battery module including a plurality of battery stacks inside.

[0013] The power storage device 100 may include a current sensor 1, a distribution unit 2, a plurality of disconnect control units 3, and a plurality of detection units 4.

[0014] (Current Sensor 1) The current sensor 1 may be interpreted as a current detection unit that detects a current flowing through the battery pack 200. The current sensor 1 may detect a current flowing through the battery pack 200 and output information indicating the value of the detected current to the distribution unit 2.

[0015] (Distribution Unit 2) The distribution unit 2 may control each of the plurality of disconnect control units 3. Specifically, the distribution unit 2 may generate a control command to disconnect a part of the plurality of batteries constituting the battery pack 200 from the battery pack 200, or may generate a control command to perform control to incorporate the battery into the battery pack 200, and output these generated control commands.

[0016] The distribution unit 2 may distribute an address to be set in a specific detection unit 4. Specifically, the distribution unit 2 may generate a control command to sequentially disconnect one by one each of the plurality of batteries constituting the battery pack 200 from the battery pack 200, and output the generated control command to the disconnect control unit 3 corresponding to the battery to be disconnected. Then, the distribution unit 2 may distribute a specific address to all of the plurality of detection units 4 at the timing when the control command is output.

[0017] Disconnecting each of the plurality of batteries one by one from the assembled battery 200 in order may be interpreted as disconnecting each of the plurality of batteries serially in the order of 1 to N, or may be interpreted as disconnecting each of the plurality of batteries at specific intervals (every other one, every two, etc.) in the order of 1 to N. "N" may be interpreted as a natural number of 1 or more. "N" may be interpreted as any one of the total number of the disconnection control units 3, the total number of the batteries, and the total number of the detection units 4. When each of the plurality of batteries is disconnected from the assembled battery 200 one by one in order, the battery to be detected by the detection unit 4 for which the address setting is completed by disconnecting the battery is incorporated into the assembled battery 200 after the address setting is completed.

[0018] Distributing a specific address to all of the plurality of detection units 4 may be interpreted as transmitting the specific address by broadcast.

[0019] The address may be interpreted as an identifier for setting to a specific detection unit 4 that measures the voltage of the nth battery disconnected from the assembled battery 200 among the plurality of detection units 4. The address may be interpreted as an identifier for specifying a specific detection unit 4 that measures the voltage of the nth battery disconnected from the assembled battery 200 among the plurality of detection units 4. "n" may be interpreted as a natural number of 1 or more.

[0020] Note that when the distribution unit 2 receives information indicating the set address transmitted from the detection unit 4 as described later, instead of the nth battery among the plurality of detection units 4, the (n + 1)th battery is disconnected from the assembled battery 200, and the address to be set to the specific detection unit 4 that measures the voltage of the (n + 1)th battery disconnected from the assembled battery 200 may be distributed to all of the plurality of detection units 4.

[0021] Specifically, when the nth battery among the plurality of detection units 4 is disconnected from the battery pack 200, the distribution unit 2 may receive information indicating the set address from the detection unit 4 corresponding to the nth battery. Thereby, the distribution unit 2 recognizes that the setting of the address to the detection unit 4 corresponding to the nth battery is completed. Then, the distribution unit 2 outputs a control command for disconnecting the (n + 1)th battery in order to disconnect the (n + 1)th battery after the nth battery. Further, the distribution unit 2 distributes an address different from the address set in the detection unit 4 corresponding to the nth battery to all of the plurality of detection units 4. Thereby, an address different from the address set in the detection unit 4 corresponding to the nth battery can be set in a specific detection unit 4 that measures the voltage of the (n + 1)th battery. The same applies when disconnecting the (n + 2)th battery, the (n + 3)th battery, and so on.

[0022] (Disconnection control unit 3) Based on a control command from the distribution unit 2, the disconnection control unit 3 may perform control to disconnect a battery constituting the battery pack 200 from the battery pack 200 or incorporate the battery into the battery pack 200.

[0023] (Detection unit 4) The detection unit 4 may detect that a battery constituting the battery pack 200 has been disconnected from the battery pack 200 or that the battery has been incorporated into the battery pack 200. The detection unit 4 may be interpreted as a monitoring unit that monitors the state of the battery constituting the battery pack 200.

[0024] Specifically, the detection unit 4 may be connected to the battery pack 200 and measure the voltage of each of the plurality of batteries. The detection unit 4 may detect that the nth battery has been disconnected from the battery pack 200 based on the voltage difference of the measured voltages. More specifically, when the measured voltage difference changes to a specific value (threshold value) or more, it may be detected that the nth battery among the plurality of batteries has been disconnected from the battery pack 200.

[0025] When the measured voltage changes to a value (threshold value) or higher, for example, during charging of the battery pack 200, it may be interpreted that the measured voltage changes from a high state to a low state, and the voltage difference before and after measurement is equal to or greater than a specific threshold value (threshold value). Also, when the measured voltage changes to a value (threshold value) or higher, for example, during discharging of the battery pack 200, it may be interpreted that the measured voltage changes from a low state to a high state, and the voltage difference before and after measurement is equal to or greater than a specific value (threshold value).

[0026] The detection unit 4 that has detected that the battery has been disconnected from the battery pack 200 may set the address received when the disconnection was detected in the detection unit 4. The time for detecting the disconnection may be interpreted as a specific time from the point in time when the measured voltage changes to a value (threshold value) or higher. The specific time may be interpreted as several μsec, several msec, several tens of msec, etc. The specific time may also be interpreted as the time between the point in time when a specific battery is disconnected and the point in time when the next battery is disconnected. Setting the address may be interpreted as recording the address in the memory of the detection unit 4.

[0027] The detection unit 4 may transmit information indicating the set address to the distribution unit 2. Specifically, each of the plurality of detection units 4 may transmit information indicating the value of the address set in itself to the distribution unit 2. These pieces of information may be interpreted as messages corresponding to the set addresses.

[0028] In this way, the power storage device 100 can distribute to all of the plurality of detection units 4 the address for setting the specific detection unit 4 that measures the voltage of the nth battery disconnected from the battery pack 200 among the plurality of batteries, one by one in order. As a result, when the specific detection unit 4 detects that the battery has been disconnected from the battery pack 200, it can set the received address to the specific detection unit 4. Even if the remaining detection units 4 other than the specific detection unit 4 receive the address, they do not set the address because they have not detected that the battery has been disconnected from the battery pack 200. Therefore, different addresses can be set for the individual detection units 4 without mounting a circuit for setting an address in each of the plurality of detection units 4. The circuit may be interpreted as a DIP switch for address setting, a plurality of input terminals included in one detection unit 4, and the like. The plurality of input terminals may be interpreted as terminals for inputting the voltage of each of the plurality of batteries.

[0029] Next, the operation of the power storage device 100 will be described with reference to FIGS. 2 to 7. Here, the address setting operation during charging of the battery pack 200 will be described. FIGS. 2 and 3 are flowcharts for explaining the operation of the power storage device. FIG. 2 shows the processing of the distribution unit 2.

[0030] In step S1, the distribution unit 2 may output a control command to each of the plurality of disconnection control units 3 (♯1 to ♯A) to make all the batteries in a series connection state (ON state) and start charging.

[0031] Specifically, a control command is output to turn on the switch SW1 and turn off the switch SW2 provided in each of the plurality of disconnection control units 3 shown in FIG. 1. The switch SW1 may be interpreted as a switch that can form a path for connecting the plurality of batteries in series. The switch SW2 may be interpreted as a switch that can form a path for connecting the remaining batteries except for a specific battery in series even when the specific battery is disconnected among the plurality of batteries.

[0032] "A" may be interpreted as the number of batteries to be set to the ON state (simultaneous connection number) among a plurality of batteries, and may also be interpreted as the number of detection units 4 for measuring these voltages. For example, when any two of the four batteries shown in FIG. 1 are set to the ON state, "A" may be interpreted as 2. "A" may be set so that the total voltage of all the connected batteries falls within the voltage range of the inverter mounted on the upper system (for example, the upper limit is 100V and the lower limit is 50V).

[0033] In step S2, the distribution unit 2 sets n = 1.

[0034] In step S3, the distribution unit 2 may output a control command for changing the switch SW1 provided in the disconnection control unit 3 corresponding to n = 1 from ON to OFF (changing the switch SW2 from OFF to ON), and a control command for maintaining the switch SW1 provided in the remaining disconnection control units 3 in the ON state (switch SW2 in the OFF state).

[0035] Specifically, the distribution unit 2 may output a control command for changing the switch SW1 of the disconnection control unit 3 (♯1) corresponding to the first battery (♯1) among the four disconnection control units 3 shown in FIG. 1 from ON to OFF (changing the switch SW2 from OFF to ON). Further, the distribution unit 2 may output a control command for maintaining the switch SW1 of the disconnection control units 3 (♯2 to ♯4) corresponding to the remaining batteries (♯2 to ♯4) in the ON state (switch SW2 in the OFF state).

[0036] In step S4, the distribution unit 2 may transmit an address (address setting value) to be set to the detection unit 4 that measures the voltage of the battery disconnected and controlled by the disconnection control unit 3 corresponding to n = 1. Specifically, the distribution unit 2 may broadcast the address to be set to the detection unit 4 (♯1) that measures the voltage of the battery (♯1) disconnected and controlled by the first disconnection control unit 3 (♯1) among the four disconnection control units 3 shown in FIG. 1. As a result, the address is set in the detection unit 4 (♯1), and the detection unit 4 may transmit information indicating the set address to the distribution unit 2.

[0037] In step S5, if the distribution unit 2 has not received the information indicating the address (step S5: NO), the processes after step S4 may be repeatedly executed. If the distribution unit 2 has received the information indicating the address (step S5: YES), in step S6, the value of n is incremented.

[0038] In step S7, the distribution unit 2 may determine whether the value of n has exceeded N. "N" may be interpreted as any one of the total number of disconnection control units 3, the total number of batteries, and the total number of detection units 4. If the value of n has not exceeded N (step S7: NO), the distribution unit 2 may repeatedly execute the processes after step S3. If the value of n has exceeded N (step S7: YES), the distribution unit 2 may end the address setting process.

[0039] In FIG. 3, the processes of each of the plurality of detection units 4 are shown. In step S11, each detection unit 4 may record the values (V1) of the voltage being measured in chronological order. In step S11, the detection unit 4 may record the voltage V1 with an initial value (for example, 0V), or may record only the previous value of the voltage V1. By setting the initial value of the voltage V1 to 0V, false determination can be prevented at the first comparison of V1 (previous value) and V2 (current value) in step S13.

[0040] In step S12, each detection unit 4 periodically measures the voltage regardless of the change in the voltage being measured, and records the measured voltage as the value (V2) of the voltage.

[0041] In step S13, each detection unit 4 may determine whether the voltage difference, which is the difference between the voltage values (V1, V2) before and after the change, has changed to a specific value (threshold value) or more. Specifically, the detection unit 4 may determine whether the voltage difference, which is the difference between V1 (previous value) and V2 (current value), has changed to a specific value (threshold value) or more. When the voltage difference is less than the specific value (step S13: NO), each detection unit 4 may determine in step S14 that the voltage values before and after the change are substantially equal, and may repeatedly execute the processes after step S12. When the voltage difference is the specific value or more (step S13: YES), the detection unit 4 that measured the voltage may set the address transmitted in step S4 shown in FIG. 2 in step S15. Note that each detection unit 4 may include, in step S13, cases where V1 and V2 are significantly different but V2 becomes higher than V1 when the battery is connected, when the voltage difference is less than the specific value (step S13: NO).

[0042] In step S16, the detection unit 4 may transmit the measurement data to the distribution unit 2. The measurement data may include information indicating the set address, information on the measured voltage, battery temperature information, and the like.

[0043] In step S17, the detection unit 4 may determine whether an end instruction has been received. When the end instruction has not been received (step S17: NO), the detection unit 4 may repeatedly execute the processes after step S16. When the end instruction has been received (step S17: YES), the detection unit 4 may end the address setting process.

[0044] FIG. 4, FIG. 5, FIG. 6, and FIG. 7 are diagrams for explaining the voltage measured before and after a specific battery is disconnected, the state of switch SW1, the state of switch SW2, the set address, and the like.

[0045] FIG. 4 shows the state of the disconnection control unit 3(♯1) before disconnecting the battery of ♯1. Specifically, the disconnection control unit 3(♯1) that performs the disconnection control of the battery of ♯1 sets the switch SW1 to ON and sets the switch SW2 to OFF. Similarly, the disconnection control unit 3(♯2) that performs the disconnection control of the battery of ♯2 sets the switch SW1 to ON and sets the switch SW2 to OFF. On the other hand, each of the remaining disconnection control units 3(♯3, ♯4) sets the switch SW1 to OFF and sets the switch SW2 to ON.

[0046] FIG. 5 shows the state of the disconnection control unit 3(♯1) after disconnecting the battery of ♯1. Specifically, the disconnection control unit 3(♯1) sets the switch SW1 to OFF and sets the switch SW2 to ON. That is, the disconnection control unit 3(♯1) changes the switch SW1 from the ON state shown in FIG. 4 to the OFF state, and changes the switch SW2 from the OFF state to the ON state. In this case, as shown in FIG. 5, the disconnection control unit 3(♯3) corresponding to the battery of ♯3 may change the switch SW1 from the OFF state shown in FIG. 4 to the ON state, and change the switch SW2 from the ON state to the OFF state. Thereby, it is possible to suppress fluctuations in the overall voltage of the assembled battery 200 accompanying changes in the switches SW1 and SW2 of the disconnection control unit 3(♯1).

[0047] FIG. 6 shows the connection state of each of the plurality of batteries and the set address. Specifically, the address “1” transmitted at the timing when the battery (♯1) is disconnected as shown in FIG. 5 is set in the detection unit 4(♯1) corresponding to the disconnection control unit 3(♯1).

[0048] Also, the address “2” transmitted at the timing when the battery (♯2) is disconnected is set in the detection unit 4(♯2) corresponding to the disconnection control unit 3(♯2). The address “3” transmitted at the timing when the battery (♯3) is disconnected is set in the detection unit 4(♯3) corresponding to the disconnection control unit 3(♯3). The address “4” transmitted at the timing when the battery (♯4) is disconnected is set in the detection unit 4(♯4) corresponding to the disconnection control unit 3(♯4).

[0049] FIG. 7 shows the relationship between the state when the voltage measured by each of the plurality of detection units changes to a specific value or more and the address set for each detection unit. As shown in FIG. 7, at time t1, when the disconnection control unit 3(#1) disconnects the first battery (#1), the voltage difference measured by the detection unit 4(#1) changes to a specific value (threshold value) or more. As a result, the address "1" transmitted from the distribution unit 2 is set for the detection unit 4(#1).

[0050] At time t2, when the disconnection control unit 3(#2) disconnects the second battery (#2), the voltage difference measured by the detection unit 4(#2) changes to a specific value (threshold value) or more. As a result, the address "2" transmitted from the distribution unit 2 is set for the detection unit 4(#2).

[0051] At time t3, when the disconnection control unit 3(#3) disconnects the third battery (#3), the voltage difference measured by the detection unit 4(#3) changes to a specific value (threshold value) or more. As a result, the address "3" transmitted from the distribution unit 2 is set for the detection unit 4(#3).

[0052] At time t4, when the disconnection control unit 3(#4) disconnects the fourth battery (#4), the voltage difference measured by the detection unit 4(#4) changes to a specific value (threshold value) or more. As a result, the address "4" transmitted from the distribution unit 2 is set for the detection unit 4(#4).

[0053] Next, with reference to FIGS. 9 to 12, the address setting operation during the discharge of the battery pack 200 will be described. FIGS. 9 and 10 are flowcharts for explaining the operation of the power storage device.

[0054] The difference between the flowcharts of FIGS. 2 and 9 is that in FIG. 9, instead of step S1, the process of step S1A is executed. In step S1A, the distribution unit 2 may output a control command to set all the batteries in a series connection state (ON state) to each of the plurality of disconnection control units 3 (♯1 to ♯A) and start discharging.

[0055] The difference between the flowcharts of FIGS. 3 and 10 is that in FIG. 10, instead of steps S11 and S13, the processes of steps S11A and S13A are executed. In step S11A, the detection unit 4 may record the voltage V1 with an initial value (for example, infinity ∞), or may record only the previous value of the voltage V1. In step S11A, each detection unit 4 may determine whether the voltage difference, which is the difference between the values of the voltages (V1, V2) before and after the change, has changed to a specific value (threshold value) or more. Specifically, the detection unit 4 may determine whether the voltage difference, which is the difference between V2 (the current value) and V1 (the previous value), has changed to a specific value (threshold value) or more. If the voltage difference is less than the specific value (step S13A: NO), each detection unit 4 may execute the process of step S14, and if the voltage difference is equal to or more than the specific value (step S13A: YES), the process of step S15 may be executed.

[0056] FIG. 11 shows the addresses set during the discharge of the assembled battery 200. FIG. 12 shows the voltage measured during the discharge of the assembled battery 200, the states of the switches SW1 and SW2, the set addresses, and the like.

[0057] (Comparative Example) FIG. 8 is a diagram showing a configuration example of a power storage device according to a comparative example. The power storage device 100A according to the comparative example includes a detection unit 4A instead of the detection unit 4. The detection unit 4A includes an address circuit 300.

[0058] The address circuit 300 may be interpreted as a circuit for setting an address for each of the plurality of detection units 4A, and may be interpreted as the DIP switch for address setting described above. The address circuit 300 may also be interpreted as a plurality of voltage terminals or the like included in one detection unit 4A.

[0059] When the address circuit 300 is a DIP switch, when setting an address for each of the plurality of detection units 4A, a person operates the DIP switch to set it for each of the plurality of detection units 4A. Also, since different values are set manually for each detection unit 4A, there may be cases where the specifications of the detection unit 4A cannot be standardized. Further, by providing the address circuit 300, the circuit configuration of the detection unit 4A becomes complicated, the manufacturing cost of the detection unit 4A increases, and furthermore, the substrate area of the detection unit 4A may increase.

[0060] (Operation and Effect) The power storage device 100 of the present disclosure includes a plurality of detection units that detect that the nth battery (n is a natural number of 1 or more) among the plurality of batteries has been disconnected from the assembled battery when the measured voltage changes to a specific value or more, and sequentially disconnects each of the plurality of batteries one by one from the assembled battery, and a distribution unit that distributes the address set for a specific detection unit that measures the voltage of the nth battery disconnected from the assembled battery to all of the plurality of detection units. Further, the specific detection unit can set the address received when detecting that the battery has been disconnected from the assembled battery to the specific detection unit.

[0061] With this configuration, the power storage device 100 of the present disclosure can set the address distributed at the timing of detecting that the battery has been disconnected from the assembled battery to each detection unit 4 without providing the aforementioned address circuit 300. For this reason, the specifications of the plurality of detection units 4 can be standardized, and the circuit configuration of the detection unit 4 can be simplified. Also, the manufacturing cost of the detection unit 4 can be reduced, and furthermore, an increase in the substrate area of the detection unit 4 can be suppressed.

[0062] Note that the power storage device 100 of the present disclosure is applicable to automobiles equipped with storage batteries, utility power supplies, etc.

[0063] Note that the following supplementary notes are further disclosed regarding the above description.

[0064] (Supplementary Note 1) Connected to a battery pack including a plurality of batteries connected in series, measuring the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, detecting that the nth (n is a natural number of 1 or more) battery among the plurality of batteries has been disconnected from the battery pack; a plurality of detection units, Disconnecting each of the plurality of batteries from the battery pack one by one in order, and distributing to all of the plurality of detection units an address set to a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units; a distribution unit, Comprising The specific detection unit sets the address received when detecting that the battery has been disconnected from the battery pack to the specific detection unit, a power storage device.

[0065] (Appendix 2) The specific detection unit transmits information indicating the set address to the distribution unit, When the distribution unit receives the information, it disconnects the (n + 1)th battery from the battery pack among the plurality of batteries, and distributes to all of the plurality of detection units an address set to a specific detection unit that measures the voltage of the (n + 1)th battery disconnected from the battery pack, the power storage device according to Appendix 1.

[0066] (Appendix 3) At least one processor Connected to a battery pack including a plurality of batteries connected in series, measuring the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, detecting that the nth (n is a natural number of 1 or more) battery among the plurality of batteries has been disconnected from the battery pack; a plurality of detection units, and disconnecting each of the plurality of batteries from the battery pack one by one in order, and controlling a distribution unit that distributes to all of the plurality of detection units an address set to a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units, A control method for executing a process of setting the address received when detecting that the battery has been disconnected from the battery pack to the specific detection unit.

[0067] (Appendix 4) connected to a battery pack including a plurality of batteries connected in series to at least one processor, measuring the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, detecting that the nth (n is a natural number of 1 or more) battery among the plurality of batteries has been disconnected from the battery pack; a distribution unit that sequentially disconnects each of the plurality of batteries one by one from the battery pack and distributes an address to be set to a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units to all of the plurality of detection units, and a control program that executes a process of setting the address received when it is detected that the battery has been disconnected from the battery pack to the specific detection unit.

Explanation of Signs

[0068] 1 Current sensor 2 Distribution unit 3 Disconnection control unit 4 Detection unit 4A Detection unit 100 Power storage device 100A Power storage device 300 Address circuit​

Claims

1. Connected to a battery pack including a plurality of batteries connected in series, measuring the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, among the plurality of batteries, the nth (n is a natural number of 1 or more) battery is detected as being disconnected from the battery pack; a plurality of detection units; Disconnecting each of the plurality of batteries from the battery pack one by one in order, and distributing an address to be set to a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units to all of the plurality of detection units; a distribution unit; Comprising: The specific detection unit sets the address received when detecting that the battery has been disconnected from the battery pack to the specific detection unit; a power storage device.

2. The specific detection unit transmits information indicating the set address to the distribution unit, When receiving the information, the distribution unit disconnects the (n + 1)th battery from the battery pack among the plurality of batteries, and distributes an address to be set to a specific detection unit that measures the voltage of the (n + 1)th battery disconnected from the battery pack to all of the plurality of detection units; the power storage device according to Claim 1.

3. At least one processor Connected to a battery pack including a plurality of batteries connected in series, measuring the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, among the plurality of batteries, the nth (n is a natural number of 1 or more) battery is detected as being disconnected from the battery pack; a plurality of detection units, and disconnecting each of the plurality of batteries from the battery pack one by one in order, and controlling a distribution unit that distributes an address to be set to a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units to all of the plurality of detection units; A control method for executing a process of setting the address received when detecting that the battery has been disconnected from the battery pack to the specific detection unit.

4. To at least one processor Connected to a battery pack including a plurality of batteries connected in series, measuring the voltage of each of the plurality of batteries, and when the measured voltage changes to a specific value or more, detecting that the nth (n is a natural number of 1 or more) battery among the plurality of batteries has been disconnected from the battery pack; a plurality of detection units; and sequentially disconnecting each of the plurality of batteries one by one from the battery pack, and distributing an address to be set to a specific detection unit that measures the voltage of the nth battery disconnected from the battery pack among the plurality of detection units to all of the plurality of detection units, and controlling, A control program that executes a process of setting the address received when it is detected that the battery has been disconnected from the battery pack to the specific detection unit.

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