JP4930452B2 - Battery pack adjustment device - Google Patents

Description

  The present invention relates to a unit battery which is one of a single battery cell and a plurality of adjacent battery cells constituting an assembled battery as a series connection body of battery cells, for each block including a plurality of adjacent unit batteries. Furthermore, the present invention relates to an assembled battery adjustment device including a plurality of block processing means for performing a plurality of different processes.

  In a hybrid vehicle or the like, an assembled battery as a series connection body of a plurality of battery cells is mounted as a high voltage battery. In a high voltage battery, it is desirable to perform processing for monitoring the voltage of each battery cell constituting the battery or equalizing the voltage between the battery cells. On the other hand, when such a process is performed by a single integrated circuit, it is necessary to use a circuit with a very high breakdown voltage. For this reason, the battery cells in the high voltage battery are grouped for several adjacent battery cells, and each of these groups is used as a block to monitor the voltage of the battery cells and to equalize the voltages between the battery cells. It has been put to practical use to perform processing.

  As a technique for equalizing the voltage of the battery cells in the block, a technique for discharging a battery cell having a high voltage with a discharge circuit is well known. However, the voltage of all the battery cells constituting the high voltage battery cannot be equalized only by performing the equalization process within the block.

  Therefore, conventionally, as seen in, for example, Patent Document 1 below, it has also been proposed to partially overlap battery cells constituting a block between adjacent blocks. According to this, the voltage of the same battery cell is monitored by an integrated circuit corresponding to each of a plurality of blocks configured to include the same, and equalization processing is performed. It is possible to equalize the voltages of the battery cells, and thus to equalize the voltages of all the battery cells constituting the high-voltage battery. However, in the technique described in Patent Document 1, since battery cells overlap between blocks, the circuit scale of an integrated circuit that monitors each block increases, or the number of integrated circuits that monitor a block increases. .

On the other hand, as seen in Patent Document 2 below, for example, it has been proposed to equalize the voltage of the battery cells between the blocks in addition to the voltage equalization processing in the blocks. Here, the problem of increase in the circuit scale and the number of circuits is avoided by diverting the discharge circuit for equalizing the inside of the block to the equalized discharge between the blocks.
JP 2007-330021 A Japanese Patent No. 3503453

  Incidentally, the discharge process for equalization is generally realized by performing a very small amount of discharge. This is because when the amount of discharge per unit time of the battery cell increases, the influence of the polarization of the battery cell becomes significant, and it may be difficult to accurately grasp the state of charge of the battery cell. The setting is based on avoiding an excessive voltage drop of the battery cell. Under these circumstances, when the discharge circuit for equalization within the block is also used as described above to perform discharge for equalization between blocks, these two processes cannot be performed simultaneously. There is a risk that sufficient opportunities will not be given for these two equalization processes. In this case, the voltage of the battery cells in the high voltage battery cannot be properly equalized.

  The present invention has been made in order to solve the above-described problems, and has as its object the processing for equalizing the voltages between the blocks constituting the assembled battery and the processing for equalizing the voltages between the unit cells in the block. It is an object to provide a battery pack adjustment device capable of ensuring both implementation opportunities.

  Hereinafter, means for solving the above-described problems and the operation and effects thereof will be described.

  The invention according to claim 1 is a configuration in which a plurality of adjacent unit batteries are arranged with respect to a unit battery which is one of a single battery cell and a plurality of adjacent battery cells constituting an assembled battery as a series connection body of battery cells. In the battery pack adjustment device comprising a plurality of block processing means for performing each of a plurality of different processes by being supplied with power from the corresponding block for each block comprising the block processing means, And a block equalizing means for equalizing the voltages of the unit cells constituting the block, using the voltage between the unit cells constituting the block to be input, and performing a process of detecting each voltage of the block Based on the detection result of the block voltage detection processing means and the block voltage detection processing means, voltage variation between the blocks should be suppressed. Priority is given to the high voltage block by increasing the number of the block processing means in the on state among the plurality of block processing means corresponding to the high voltage block than to the low voltage block. It further comprises an inter-block equalizing means for discharging the electric power.

  Since each of the plurality of block processing means is supplied with power from the corresponding block, the power consumption of the block increases as the number of block processing means that are turned on increases. In the above invention, paying attention to this point, the block processing means can be used as a discharge path for the voltage equalization processing between the blocks, so that the intra-block equalization processing and the inter-block equalization processing can be performed simultaneously. Make it possible. For this reason, the implementation opportunity of both the process which equalizes the voltage of the blocks which comprise an assembled battery, and the process which equalizes the voltage between the unit batteries in a block can be ensured.

  The invention described in claim 1 is preferably characterized in that the plurality of blocks are composed of unit cells different from each other.

  According to a second aspect of the present invention, in the first aspect of the present invention, the assembled battery constitutes an in-vehicle high voltage battery, and the block voltage detection processing means is provided in a situation where the vehicle control system is in a stopped state. The method is characterized in that it is activated in a predetermined cycle and performs a process of detecting each voltage of the plurality of blocks.

  When the vehicle control system is in the ON state, there is a possibility that a large current is discharged from the assembled battery or a large current is charged. In this case, it is difficult to perform the equalization process. In this regard, in the above invention, in order to detect the block voltage in a situation where a large current is not charged / discharged to / from the assembled battery, in a situation where a large current is not charged / discharged to / from the assembled battery. Equalization processing can be performed. Thus, the equalization process can be performed with high accuracy.

  Further, in such a situation where the assembled battery is not charged from a generator or the like, it is desired to reduce the power consumption from the assembled battery as much as possible. For this reason, it tends to be set to shorten the time for turning on the adjusting device and the means constituting the adjusting device as much as possible. In this case, the lower limit value of the time required for the intra-block equalization processing is defined by the time scale from when the on state is turned on until the next time when the on state is turned on. For this reason, since the time required for the equalization process in the block tends to be prolonged, it is possible to secure both the process for equalizing the voltage between the blocks and the process for equalizing the voltage between the unit cells in the block. It is easy to become difficult. For this reason, the said invention becomes a thing with especially high utility value of invention of Claim 1.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the intra-block equalizing means receives a voltage between the unit cells in the corresponding block as an input, and the voltage of the unit cells is high. It is characterized in that a thing is discharged using a discharge path.

  In the above invention, equalization processing can be realized with a simple configuration.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the block according to the third aspect further includes a determination unit that determines whether or not the voltage variation between the unit cells in the block is equal to or less than a predetermined value. The corresponding inter-block equalizing means discharges all the unit cells in the corresponding block through the discharge path when the determination means judges that the variation is not more than a predetermined value with respect to the unit batteries in the block. It is characterized by making it.

  When the voltage between the unit cells constituting the high voltage block does not vary, it is not necessary to use the discharge path for the equalization process in the block. In the above invention, by paying attention to this point, the equalization processing time between the blocks can be shortened by diverting the discharge path for discharging the unit cell to the discharge of the high voltage block under such circumstances. Can do.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the block processing means detects an overcharge abnormality in which the voltage of each unit battery in the block is excessively high. It includes at least one of overcharge abnormality detection means for detecting and overdischarge abnormality detection means for detecting an overdischarge abnormality in which the voltage of each unit battery in the block is excessively low.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the inter-block equalizing means performs all of the block processing means for the high voltage of the blocks. It is characterized by being turned on.

(First embodiment)
Hereinafter, a first embodiment in which an adjustment device for an assembled battery according to the present invention is applied to an adjustment device for an in-vehicle hybrid vehicle will be described with reference to the drawings.

  FIG. 1 shows an overall configuration of a system including an assembled battery adjustment device according to the present embodiment.

  The illustrated assembled battery 10 is a series connection body of battery cells Bij (i = 1 to n, j = 1 to 4) which are secondary batteries. These battery cells Bij are lithium secondary batteries. These battery cells Bij are grouped by four adjacent to each other to form a block. A signal line Lij is connected to the positive terminal of each battery cell Bij. On the other hand, the signal lines Li (j + 1) and Ln5 are connected to the negative terminals of the battery cells Bi1 to Bi3 and Bn4, and the signal line L (i) is connected to each battery cell Bi4 (i = 1 to n-1). i + 1) 1 is connected. That is, except for the signal lines L11 and Ln5, the signal line for the negative electrode of the high potential side cell and the signal line for the positive electrode of the low potential side cell among the adjacent battery cells Bij are shared.

  A monitoring unit Ui is provided for each block of the assembled battery 10, and the state of the battery cells Bi1 to Bi4 constituting the block is monitored by the monitoring unit Ui. The monitoring unit Ui is dedicated hardware means for monitoring and adjusting the state of the battery cells Bi1 to Bi4 in the block, and is configured by an integrated circuit. The monitoring unit Ui is a hardware unit that performs a plurality of different processes for monitoring and adjusting the states of the battery cells Bi1 to Bi4 in the block, and processes related to transmission of the monitoring results. Circuit 12, overcharge detection circuit 14, overdischarge detection circuit 16, and input / output processing circuit 18.

  Here, the discharge circuit 11 is a circuit for discharging each battery cell Bij, and is connected in parallel to each battery cell Bij. As shown in FIG. 2, the discharge circuit 11 includes a series connection body of a constant current circuit 30 and a switch 32. On the other hand, the cell equalization circuit 12 compares the voltages of the battery cells Bi1 to Bi4 in the block, and discharges a high voltage by the discharge circuit 11 to perform a process for matching with a low voltage. It is. The cell equalization circuit 12 includes a comparator and the like. The specific configuration of this circuit may be based on the circuit described in Japanese Patent No. 4006877, for example. The overcharge detection circuit 14 is a hardware unit that performs processing for detecting an overcharge abnormality in which the voltages of the battery cells Bi1 to Bi4 in the block are excessively high. The overdischarge detection circuit 16 is hardware means for performing processing for detecting an overdischarge abnormality, which is an abnormality in which the voltages of the battery cells Bi1 to Bi4 in the block are excessively low. The input / output processing circuit 18 is hardware means for performing processing for transmitting the monitoring result in the monitoring unit Ui. Specifically, processing for outputting the detection result of the overcharge detection circuit 14 and the detection result of the overdischarge detection circuit 16 to the outside is performed. Specifically, for the input / output processing circuit 18 in the monitoring units U1 to U (n-1), the detection result is output to the adjacent monitoring units U2 to Un on the low potential side, and the monitoring unit Un The detection result is output to a low-pressure system described later. This is a setting for avoiding direct transmission / reception of signals between all the monitoring units Ui and the low-pressure system, and reducing insulation means such as photocouplers. Such setting is described in, for example, Japanese Patent Application Laid-Open No. 2007-278913.

  The cell equalization circuit 12, the overcharge detection circuit 14, the overdischarge detection circuit 16, and the input / output processing circuit 18 all have corresponding blocks as power supplies. And between these and the block, feed switches Sia to Sid for electrically connecting and disconnecting these are provided.

  The voltage detection circuit 20 is a circuit that detects the voltage of each block. Specifically, the voltage detection circuit 20 includes a flying capacitor and a multiplexer, and a voltage of a block selected by the multiplexer is applied to the flying capacitor.

  The voltage across the flying capacitor and the output signal of the monitoring unit Un are output to the overall processing unit (MPU 24) via the interface 22 configured with a photocoupler or the like. The MPU 24 constitutes an in-vehicle low-voltage system that is insulated from the in-vehicle high-voltage system that includes the assembled battery 10, and performs processing that controls processing related to monitoring and adjustment of the state of the assembled battery 10. This is executed mainly by operating the monitoring unit Ui. Specifically, the power supply switches Sia to Sid are selectively turned on to cause the monitoring unit Ui to perform a desired process. In the figure, for convenience, signal lines connecting the power feeding switches Sia to Sid and the MPU 24 are not shown.

  The MPU 24 is turned on when the in-vehicle control system is turned on. Here, the on-state of the in-vehicle control system may be, for example, a state in which the power conversion circuit (inverter) connected to the rotating machine as the in-vehicle power generation device and the assembled battery 10 are electrically connected. Further, for example, a control device that operates the power conversion circuit with the rotating machine as a control target may be turned on.

  The MPU 24 is activated every time a predetermined time is measured by the timer 26 even when the control system is stopped, and performs a process of equalizing the voltages of the battery cells Bij. This will be described in detail below.

  FIG. 3 shows the procedure of the equalization process. This process is executed by the MPU 24 every time the MPU 24 is activated based on the time counting operation of the timer 26.

  In this series of processing, first, in step S <b> 10, the voltage detection circuit 20 is activated to detect voltage variations between blocks constituting the assembled battery 10. That is, the voltage detection circuit 20 is used to detect the voltage of each block, and the detection result is captured. When the voltage detection results of all the blocks are captured, the voltage detection circuit 20 is turned off in step S12. In the subsequent step S14, it is determined whether or not block equalization is necessary based on the result of the variation detection in step S10. Here, it is determined that block equalization is necessary when the voltage difference between the blocks is equal to or greater than a predetermined value.

  If it is determined that block equalization is not necessary, only the power supply switches S1a to Sna are turned on in step S16. Thereby, for each block constituting the assembled battery 10, the corresponding equalization circuit 12 detects the voltage variation of the battery cells Bi1 to Bi4, and the discharge circuit 11 is operated based on the result. For this reason, the voltage equalization process of battery cell Bi1-Bi4 in each block will be performed as needed.

  On the other hand, if it is determined in step S14 that block equalization is necessary, a block to be discharged is specified. Here, a block having a voltage higher than the minimum value of the block voltage by a predetermined value or more may be a discharge target. In subsequent step S20, all of the power supply switches Sxa to Sxd (x: the number of the block to be discharged) are turned on for the block to be discharged. In addition, only the power supply switch Sya (y: the number of the block not to be discharged) is turned on for the blocks that are not to be discharged.

  When the processes in steps S16 and S20 are completed, the MPU 24 is turned off in step S22.

  Thus, in this embodiment, when it is determined that the block equalization process is necessary, the voltage can be lowered by maximizing the power consumption by the monitoring unit Ui connected to the high voltage block. . Here, in this embodiment, the current consumption of each of the cell equalization circuit 12, the overcharge detection circuit 14, the overdischarge detection circuit 16, and the input / output processing circuit 18 is about several hundred μA. For this reason, a current of several mA can be passed by setting all of these to the on state. On the other hand, the current consumption when the discharge circuit 11 is turned on is several mA to several tens of mA. For this reason, the current consumption by the discharge circuit 11 and the current consumption for block equalization (current consumption when all the power supply switches Sia to Sid are turned on) are the same level (the current consumption by the discharge circuit 11 is equal to the block). 1 to several times as much as the current consumption for conversion. For this reason, block equalization can be suitably performed by maximizing the power consumption of the monitoring unit Ui. Furthermore, if the current consumption for block equalization is set smaller than the current consumption for cell equalization, it is preferable that the voltage of a specific battery cell in the block to be discharged is excessively reduced. Can be avoided.

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

  (1) ON of a plurality of block processing means (cell equalization circuit 12, overcharge detection circuit 14, overdischarge detection circuit 16, and input / output processing circuit 18) to suppress variations in voltage between blocks The block having a high voltage was discharged preferentially by increasing the number of the state corresponding to the block having a high voltage to that corresponding to the block having a low voltage. Thereby, the implementation opportunity of both the process which equalizes the voltage of the blocks which comprise an assembled battery, and the process which equalizes the voltage between the unit batteries in a block can be ensured.

  (2) In a situation where the vehicle control system is in a stopped state, the MPU 24 is activated at a predetermined cycle to perform a process of detecting each voltage of the plurality of blocks. Thereby, the electric power consumption from the assembled battery 10 can be reduced as much as possible under the situation where the assembled battery 10 is not charged from a generator or the like.

  (3) The voltage in the block was equalized using the discharge circuit 11. Thereby, equalization processing can be realized with a simple configuration.

  (4) The discharge circuit 11 includes the constant current circuit 30. As a result, it is possible to configure a discharging means for equalizing the cell voltages in the block with a small circuit. That is, when the MPU 24 is activated every predetermined cycle (for example, several hours) and the state of the discharge circuit 11 is updated each time, the discharge amount per unit time is avoided from the viewpoint of avoiding overdischarge abnormality of the battery cell Bij. Will be restricted. In addition, when the discharge current is large, the polarization significantly affects the detection of the state of charge (discharge capability: SOC) based on the voltage at both ends. For this reason, there is a demand for a small amount of discharge current. Here, when a discharge circuit is configured using a resistor as a linear element, a request to set a large resistance value arises from the viewpoint of limiting the discharge amount, and there is a concern that the discharge circuit 11 may be enlarged. .

  (5) If current consumption for equalization between blocks is made smaller than current consumption for equalization within a block, it is preferable to avoid excessively lowering the voltage of a specific battery cell in the block. can do.

  (6) Regarding the voltage of the battery cells in the block, only the circuit for comparing the magnitude relationship is provided, and no means for detecting the voltage value is provided. Thereby, the voltage of the battery cell Bij which comprises the assembled battery 10 can be equalized by a simple structure as much as possible.

(Second Embodiment)
Hereinafter, the second embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. In the present embodiment, the same reference numerals are used for the members corresponding to the members in the first embodiment for convenience.

  In the present embodiment, the present invention is applied to an electric vehicle instead of a hybrid vehicle. In this case, the voltage of each battery cell Bij constituting the assembled battery 10 is high, and the capacity of each battery cell Bij is also large. For this reason, it is desirable to increase the discharge current for equalization. Therefore, in the present embodiment, the discharge circuit 11 is configured by a resistor 34 and a switch 32, which are linear elements, as shown in FIG. Thereby, the expansion of the circuit scale of the discharge circuit 11 can be suppressed while the means for flowing a current of “several tens to several hundred mA” is configured using a simple linear element.

  FIG. 5 shows a procedure of equalization processing according to the present embodiment. This process is executed by the MPU 24 every time the MPU 24 is activated based on the time counting operation of the timer 26. In FIG. 5, processes corresponding to the processes shown in FIG. 3 are given the same reference numerals for the sake of convenience.

  In this series of processes, when the process of step S20 is completed, the process proceeds to step S24. In step S24, it is determined whether the equalization continuation time by the cell equalization circuit 12 in the discharge target block is equal to or longer than the specified time α. This process is to determine whether or not the equalization process in the block to be discharged has been completed. Here, the specified time α is set to a time when the cell equalization circuit 12 assumes that the voltage variation of the battery cells Bi1 to Bi4 in the block is equal to or less than a predetermined value. If it is determined that the time is equal to or longer than the specified time α, in step S26, all the discharge circuits 11 of the discharge target block are turned on. This can be realized by enabling the switch 32 of the discharge circuit 11 to be operated not only by the cell equalization circuit 12 but also by the MPU 24.

  According to such a process, when it is assumed that the equalization process of the cells of the discharge target block has been completed, the discharge circuit 11 can be diverted as the discharge means of the discharge target block. The current can be increased and thus the voltage can be quickly reduced. Therefore, the total consumption current (for example, several mA) of the plurality of block processing means (cell equalization circuit 12, overcharge detection circuit 14, overdischarge detection circuit 16, and input / output processing circuit 18) is the discharge circuit 11 Even if it is 1/10 or less of the current consumption by, equalization between blocks can be performed appropriately.

  According to this embodiment described in detail above, in addition to the effects (1) to (3) and (6) of the first embodiment, the following effects can be obtained.

  (7) When it is determined that the voltage variation between the battery cells in the discharge target block is equal to or less than a predetermined value, all the battery cells Bi1 to Bi4 in the corresponding block are discharged by the discharge circuit 11. Thereby, the equalization processing time between blocks can be shortened.

(Other embodiments)
Each of the above embodiments may be modified as follows.

  In each of the above embodiments, when there is a voltage variation between the blocks, all of the power supply switches Sia to Sid corresponding to the high voltage block are turned on, but this is not limitative. For example, the number of the power supply switches Sia to Sid that are turned on may increase stepwise in three or more steps as the voltage corresponds to a higher voltage block.

  The overcharge detection circuit 14 and the overdischarge detection circuit 16 may be configured by sharing some circuits as seen in the above-mentioned Japanese Patent Application Laid-Open No. 2007-278913. In this case, the power supply switch is shared between them.

  The means for equalizing the voltages between the battery cells constituting the block is not limited to turning on / off the discharge circuit based on the detection of the magnitude relationship of the voltages. For example, an A / D converter such as a time A / D converter (TAD) may be provided to directly detect the voltage of the battery cell and turn on / off the discharge circuit based on the detection result. .

  The block voltage detection processing means for performing the process of detecting each voltage of the block is not limited to the one configured with the voltage detection circuit 20 separately from the monitoring unit Ui. For example, each monitoring unit Ui may be provided with voltage detection means to detect a block voltage and output it to the MPU 24. Here, as the voltage detection means, for example, an A / D converter such as a time A / D converter (TAD) may be used.

  Furthermore, you may make it detect the voltage of all the battery cells which comprise the assembled battery 10 with the voltage detection circuit 20 comprised including a flying capacitor. In this case, the voltage variation between the blocks and the voltage variation within the block can be grasped from the detection result of the voltage detection circuit 20. Therefore, based on this detection result, whether to turn on only the power supply switch Sia for the cell equalization circuit 12 and whether to turn on all of the power supply switches Sia to Sid are determined for each block. That's fine. Further, in this case, instead of providing the cell equalization circuit 12, a circuit for operating the discharge circuit 11 based on the voltage detection result of the battery cell may be provided.

  In each of the above embodiments, the equalization process is performed by starting the MPU 24 at a predetermined cycle based on the timer 26 when the vehicle control system is stopped, but the present invention is not limited to this. For example, the equalization process may be performed when the vehicle control system is activated, or when the vehicle is traveling.

  The means for equalizing the voltages between the battery cells constituting the block is not limited to discharging high voltage battery cells using a discharge path connected in parallel to the battery cells. For example, a means for charging a battery cell having a high voltage to a battery cell having a low voltage may be used.

  -The number of battery cells in the block is not limited to four, but may be any plural number.

  -In each said embodiment, although the voltage of each battery cell which comprises a block was equalized, you may equalize the voltage of not only this but several adjacent battery cells which comprise a block.

  -As a battery cell, not only a lithium battery but a nickel hydride battery etc. may be sufficient, for example. In short, if the voltage of the unit cell, which is one of the battery cells and the adjacent battery cells, is equalized, the equalization process in the block and the equalization between the blocks without increasing the discharge circuit The application of the present invention is effective in securing both the processing and the opportunity.

  The first embodiment may be applied to an electric vehicle, and the second embodiment may be applied to a hybrid vehicle.

1 is a system configuration diagram according to a first embodiment. FIG. The circuit diagram which shows the structure of the discharge circuit concerning the embodiment. The flowchart which shows the procedure of the equalization discharge process concerning the embodiment. The circuit diagram which shows the structure of the discharge circuit concerning 2nd Embodiment. The flowchart which shows the procedure of the equalization discharge process concerning the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Assembly battery, 11 ... Discharge circuit, 12 ... Cell equalization circuit (one embodiment of the equalization means in a block), 14 ... Overcharge detection circuit, 16 ... Overdischarge detection circuit, 20 ... Voltage detection circuit (Block voltage) One embodiment of detection processing means), 24... MPU, Bij.

Claims (6)

Applicable for each block composed of a plurality of adjacent unit batteries, with respect to a unit battery that is one of a single battery cell and a plurality of adjacent battery cells constituting an assembled battery as a series connection body of battery cells In the battery pack adjustment device comprising a plurality of block processing means for performing each of a plurality of different processes by being supplied with power from the block,
The block processing means includes an intra-block equalization means for equalizing the voltages of the unit cells constituting the block, with the voltage between the unit batteries constituting the corresponding block as an input.
Block voltage detection processing means for performing processing for detecting each voltage of the block;
Based on the detection result of the block voltage detection processing means, the number of the plurality of block processing means that are turned on in order to suppress the voltage variation between the blocks corresponds to the block having a high voltage. The battery pack adjustment device further comprises an inter-block equalizing unit that preferentially discharges the high-voltage block by increasing the number of blocks higher than that corresponding to the low-voltage block. The assembled battery constitutes an in-vehicle high voltage battery,
The block voltage detection processing means is activated at a predetermined cycle in a situation where the vehicle control system is in a stopped state, and performs processing for detecting each voltage of the plurality of blocks. The battery pack adjustment device according to claim 1.   The intra-block equalizing means is configured to discharge a high voltage among the unit cells using a discharge path, with a voltage between the unit cells in the corresponding block as an input. Item 3. An apparatus for adjusting an assembled battery according to Item 1 or 2. A judgment means for judging whether or not a variation in voltage between the unit cells in the block is equal to or less than a predetermined value;
The block equalization unit corresponding to a block having a high voltage, when the determination unit determines that the variation is equal to or less than a predetermined value for the unit cells in the block, all the unit cells in the corresponding block. 4. The battery pack adjustment device according to claim 3, wherein the battery is discharged through the discharge path.   The block processing means includes an overcharge abnormality detecting means for detecting an overcharge abnormality in which the voltage of each unit battery in the block is excessively high, and an abnormality in which the voltage of each unit battery in the block is excessively low. 5. The battery pack adjustment device according to claim 1, comprising at least one of overdischarge abnormality detection means for detecting a certain overdischarge abnormality.   The assembled battery according to any one of claims 1 to 5, wherein the inter-block equalizing means turns on all of the block processing means for the high voltage of the blocks. Adjustment device.

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