JP2010206916A - Capacity adjusting device for battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device for battery pack which can effectively prevent the fusion of voltage detection lines caused by a flow of a large current between the voltage detection lines, even when a short circuit is generated between the voltage detection lines which are derived from cells constituting the battery pack. <P>SOLUTION: The control device of the battery pack 100, which is formed by connecting a plurality of cells 10a to 10d, in series, includes a plurality of voltage detection lines 24a to 24e which are derived from electrode terminals of the cells 10a to 10d constituting the battery pack 100; and a cell voltage detection means 400 which detects terminal voltages of the cells 10a to 10d, constituting the battery pack 100 via the voltage detecting lines 24a to 24e. The control device of the battery pack is also such that the voltage detecting lines 24a to 24e are connected to the electrode terminals of the cells 10a to 10d which constitute the battery pack via first resistors 21a to 21e, which are arranged in the vicinities of the electrode terminals of the cells 10a to 10d that constitute the battery pack 100 and have prescribed resistance values. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an assembled battery capacity adjustment device.

  Conventionally, an assembled battery is configured by detecting the voltages of a plurality of cells constituting the assembled battery via voltage detection lines derived from the respective cells constituting the assembled battery and monitoring the detected cell voltages. A control device that controls each cell is known (see Patent Document 1).

JP 2003-282155 A

  However, in the above prior art, when a short circuit occurs between the voltage detection lines derived from each cell constituting the assembled battery, a short circuit is formed, a large current flows through the short circuit, and the voltage detection There was a problem that the wire melted.

  The problem to be solved by the present invention is that even when a short circuit occurs between the voltage detection lines derived from each cell constituting the assembled battery, the voltage detection line is blown out by a large current flowing between the voltage detection lines. It is an object of the present invention to provide an assembled battery control device that can effectively prevent the occurrence of the above.

  The present invention relates to an assembled battery in which a plurality of cells are connected in series, and an electrode terminal of each cell constituting the assembled battery and a voltage detection line for detecting a terminal voltage of each cell constituting the assembled battery. The above problem is solved by connecting through a resistor having a predetermined resistance value.

  According to the present invention, even when a short circuit occurs between the voltage detection lines derived from each cell constituting the assembled battery, the short circuit is caused by the resistance inserted between the electrode terminal of each cell and the voltage detection line. Since the current is limited, the occurrence of fusing of the voltage detection line can be effectively prevented.

FIG. 1 is a diagram showing a system configuration of a battery pack control apparatus according to the present embodiment. FIG. 2 is a diagram illustrating a configuration of a cell constituting the assembled battery according to the present embodiment. FIG. 3 is a diagram showing a configuration of a connection plate for a voltage detection line provided in a cell constituting the assembled battery according to the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a system configuration of a battery pack control apparatus according to the present embodiment. The battery pack control device according to the present embodiment is mounted on a hybrid vehicle, an electric vehicle, or the like. The assembled battery 100 is configured by connecting chargeable / dischargeable cells (single cells) 10a to 10d in series. In the present embodiment, the number of cells constituting the assembled battery 100 is four, but the number is not particularly limited. Further, the cells 10a to 10d constituting the assembled battery 100 are not particularly limited, and examples thereof include a lithium ion secondary battery.

  The assembled battery 100 is connected to a load 900 via a current sensor 500 and main relays 700 and 800. When the main relays 700 and 800 are turned on, DC power is supplied to the load 900. Further, when the load 900 is a motor and an inverter mounted on a hybrid vehicle, an electric automobile, or the like, the regenerative control is reversely converted into electric energy via the motor and the inverter, and the assembled battery 100 is Charged.

  The current sensor 500 detects a charge / discharge current flowing through the assembled battery 100 and outputs it to the battery controller 300 described later. The voltage sensor 600 detects the total voltage of the assembled battery 100 and outputs it to the battery controller 300 described later. Further, the main relays 700 and 800 are opened and closed by a battery controller 300 described later, and connect / release between the assembled battery 100 and the load 900.

  As shown in FIG. 1, in the cell 10a constituting the assembled battery 100, voltage detection lines 24a and 24b are connected to positive and negative electrode terminals via first capacitance adjusting resistors 21a and 21b. Yes. The voltage detection lines 24a and 24b are connected to the cell voltage detection circuit 400, and the cell voltage detection circuit 400 detects the terminal voltage of the cell 10a. Similarly, in the cells 10b to 10d, voltage detection lines 24b to 24e are connected to positive and negative electrode terminals via first capacitance adjusting resistors 21b to 21e, respectively. Similarly, the voltage detection lines 24b to 24e are connected to the cell voltage detection circuit 400, and the cell voltage detection circuit 400 detects the terminal voltages of the cells 10b to 10d.

  In addition, a series circuit composed of the second capacitance adjusting resistor 22a and the bypass switch 23a is connected in parallel to the cell 10a via the first capacitance adjusting resistors 21a and 21b and the voltage detection lines 24a and 24b. . Then, when the bypass switch 23a is turned on based on a command from the battery controller 300, the pair of first capacity adjustment resistors 21a and 21b connected in series with the voltage detection lines 24a and 24b and the bypass switch 23a are connected in series. A bypass current flows from the cell 10a through the second capacitance adjusting resistor 22a connected to the capacitor 10a, and thereby the capacitance adjusting discharge of the cell 10a is performed.

  Similarly, in the cells 10b to 10d, series circuits including second capacitance adjusting resistors 22b to 22d and bypass switches 23b to 23d are respectively connected to the first capacitance adjusting resistors 21b to 21e and voltage detection lines 24b to 24d. Are connected in parallel. The cells 10b to 10d are turned on by the bypass switches 23b to 23d based on a command from the battery controller 300, so that the first capacity adjusting resistors 21b to 21e and the second capacity adjusting resistors 22b to 22d, respectively. Capacity adjustment discharge is performed via 22d.

  That is, in the present embodiment, the first capacitance adjusting resistors 21a to 21e and the voltage detection lines 24a to 24d are connected to the cell voltage detection circuit 400 so that the terminal voltages of the cells 10a to 10d can be detected. In addition to the above, together with the second capacity adjusting resistors 22a to 22d and the bypass switches 23a to 23d, a capacity adjusting circuit 200 for performing capacity adjusting discharge of each of the cells 10a to 10d is configured.

  The first capacitance adjusting resistors 21a to 21e are provided on a connection plate connected to the electrode terminals of the cells 10a to 10d as will be described later. The second capacity adjustment resistors 22a to 22d and the bypass switches 23a to 23d together with the battery controller 300 and the cell voltage detection circuit 400 constitute an assembled battery control device.

In the present embodiment, the first capacity adjusting resistors 21a, 21b, 21c, 21d, 21e are all assumed to have the same resistance value _{R 1,} also the second capacity adjusting resistors 22a, 22b, 22c, the well 22 d, both assumed to have the same resistance value _{R 2.} In the present embodiment, it is desirable to resistance _{R 1} of the first capacity adjusting resistor 21 a to 21 e, and the resistance value _{R 2} of the second capacity adjusting resistor 22a~22d shall satisfy the following conditions .

That is, to those satisfying either of the resistance value of the first capacity adjusting resistor 21 a to 21 e _{R 1,} and the resistance value _{R 2} of the formula in the second capacity adjusting resistor 22a~22d (1) ~ (3) It is desirable to satisfy the following formulas (1) to (3).
R ₁ × 2 + R ₂ ≧ V _MAX / I _MAX (1)
_{R 1 × 2 + R 2 ≦} V MIN / I A (2)
{V _MAX / (R ₁ × 2 + R ₂ )} ² ≦ Q (3)

In the above formula (1), V _MAX is a predetermined upper limit voltage for the cells 10 a to 10 d, and I _MAX is the maximum value of the bypass current that can be allowed by the voltage detection lines 24 a to 24 d constituting the capacity adjustment circuit 200. It is. In the above formula _{(2), V MIN} is a predetermined minimum voltage for the cells 10 a to 10 d, _{I A} is the value of current required for capacity adjustment discharge by the capacity adjustment circuit 200. Further, in the above equation (3), V _MAX is an upper limit voltage determined in advance for the cells 10a to 10d as in the above equation (1), and Q is allowed by the second capacitance adjusting resistors 22a to 22d. The upper limit calorific value. The upper limit heat generation amount Q is set to a value slightly lower than the heat generation amount at which the second capacitance adjusting resistors 22a to 22d are fused. Further, the maximum value I _MAX of the bypass current allowable by the voltage detection lines 24a to 24d depends on the thickness and material of the voltage detection line to be used. For example, the bypass current allowable by the voltage detection line of 0.3 sq. The maximum value I _MAX is about 1A.

  The cell voltage detection circuit 400 is connected to the plus side electrode terminal and the minus side electrode terminal of each cell 10a to 10d via the voltage detection lines 24a to 24e, and thereby the terminal voltage of each cell 10a to 10d is obtained. To detect. The detected terminal voltages of the cells 10 a to 10 d are sent to the battery controller 300.

Here, when the terminal voltages of the cells 10a to 10d are V _{a to} V _d , the bypass switches 23a to 23d connected in parallel to the cells 10a to 10d are off, and the capacitance adjusting circuit 200 is bypassed. When no current is flowing (that is, when capacity adjustment discharge is not performed), the cell voltage detection circuit 400 uses the voltage value detected via the voltage detection lines 24a to 24e as the terminal voltage of each cell. V _{a to} V _d can be set.

On the other hand, when the bypass switch 23a connected in parallel to the cell 10a is turned on and capacity adjustment discharge is performed on the cell 10a, the cell voltage detection circuit 400 causes the voltage detection lines 24a and 24b to be connected. voltage detected through, rather than V _a is the value of the actual terminal voltage of the cell 10a, a value corresponding to a partial pressure of the second capacity adjusting resistor 22a. That is, when the bypass switch 23a connected in parallel to the cell 10a is turned on, if the voltage value detected by the cell voltage detection circuit 400 via the voltage detection lines 24a and 24b is V _a ′, V a _'is the relationship between the voltage V _a, to become a value corresponding to the partial pressure of the second capacity adjusting resistor 22a, voltage V _a' and the voltage V _a, the relationship represented by the following formula (4) It becomes.
V _a ′ = V _a × R ₂ / (R ₁ × 2 + R ₂ ) (4)
Wherein, _{R 1} is the resistance value of the first capacity adjusting resistors 21a, 21b, _{R 2} is the resistance value of the second capacity adjusting resistor 22a.

When this is organized for the actual terminal voltage V _a of the cell 10a, the following formula (5). Therefore, in the cell voltage detection circuit 400, when the bypass switch 23a connected in parallel to the cell 10a is turned on and capacity adjustment discharge is performed on the cell 10a, the cell voltage detection circuit 400 is connected via the voltage detection lines 24a and 24b. from the voltage _{V a} 'detected Te, according to the following equation (5) to calculate the actual terminal voltage _{V a} of the cell 10a.
V _a = V _a ′ × (R ₁ × 2 + R ₂ ) / R ₂ (5)

In the cell voltage detection circuit 400, the bypass switches 23b to 23d connected in parallel to the cells 10b to 10d other than the cell 10a are turned on, and capacity adjustment discharge is performed on the cells 10b to 10d. Similarly, the voltage V _b ′ detected via the voltage detection lines 24b and 24c, the voltage V _c ′ detected via the voltage detection lines 24c and 24d, and the voltage detection lines 24d and 24e, respectively, The actual terminal voltages V _b , V _c , and V _d of the cells 10b, 10c, and 10d are calculated based on the voltage V _d ′ detected through the voltage V _d ′.

  The battery controller 300 detects the voltage variation of each of the cells 10a to 10d based on the terminal voltage of each of the cells 10a to 10d detected by the cell voltage detection circuit 400, and when the voltage variation exceeds a predetermined value The battery pack 100 is subjected to capacity adjustment discharge. Specifically, the battery controller 300 first determines a cell whose capacity is to be adjusted among the cells 10a to 10d, and turns on a bypass switch corresponding to the cell whose capacity is to be adjusted (that is, a capacity adjustment time). Is calculated. Then, the battery controller 300 sends a signal to the bypass switch corresponding to the cell whose capacity is adjusted, and turns on the bypass switch for the calculated capacity adjustment time, thereby performing capacity adjustment discharge of the corresponding cell. For example, when capacity adjustment discharge is performed for the cell 10a, a signal is sent to the bypass switch 23a corresponding to the cell 10a, and the bypass switch 23a is turned on for a predetermined time, so that the first capacity adjustment resistor 21a, Capacitance adjustment discharge is performed on the cell 10a by causing a bypass current to flow through 21b and the second capacitance adjustment resistor 22a.

  In the present embodiment, when the capacity adjustment discharge is performed on each of the cells 10a to 10d constituting the assembled battery 100 by the battery controller 300, in addition to the voltage variation being a predetermined value or more, (I) current When the current value detected by the sensor 500 is less than or equal to a predetermined value, (II) when the state of charge (SOC) of each cell 10a to 10d constituting the assembled battery 100 is within a predetermined range, and (III ) When the cell temperature detected by a temperature sensor (not shown) installed in each of the cells 10a to 10d satisfies one of the cases where it is equal to or lower than a predetermined temperature, the capacity adjustment discharge is performed.

  In addition to the voltage variation being equal to or greater than a predetermined value, satisfying any of the above (I) to (III) is a condition for performing capacity adjustment discharge, whereby the performance of each of the cells 10a to 10d is improved. The capacity of each of the cells 10a to 10d can be adjusted well without being reduced. In the present embodiment, preferably, in addition to the voltage variation being equal to or greater than a predetermined value, a condition for performing capacity adjustment discharge satisfying any one of these (I) to (III) However, from the viewpoint of further enhancing the effect of suppressing the performance degradation of each of the cells 10a to 10d, in addition to the voltage variation being a predetermined value or more, all the conditions (I) to (III) are satisfied. When satisfied, it is preferable to perform capacity adjustment discharge.

  In addition to this, the battery controller 300 detects the charge / discharge current value detected by the current sensor 500 and the voltage sensor 600 in addition to the terminal voltages of the cells 10a to 10d detected by the cell voltage detection circuit 400. By acquiring the total voltage of the assembled battery 100, the state of each of the cells 10a to 10d is monitored, and various controls are performed to prevent overcharging and overdischarging of each of the cells 10a to 10d.

  Next, a specific configuration of each of the cells 10a to 10d constituting the assembled battery 100 will be described with reference to FIGS. In the following description, among the cells 10a to 10d, the cell 10a will be described as an example, but in the present embodiment, the cells 10b to 10d other than the cell 10a have the same configuration.

  FIG. 2 is a diagram showing a configuration of the cell 10a constituting the assembled battery 100 according to this embodiment, and FIG. 3 is a connection for voltage detection lines provided in the cell 10a constituting the assembled battery 100 according to this embodiment. It is a figure which shows the structure of the board 14a. As shown in FIG. 2, the cell 10a includes a cell main body portion 11a including a power generation element therein, and a positive electrode terminal 12a and a negative electrode terminal 13a that are led out from the cell main body portion 11a. On the positive electrode terminal 12a, A connection plate 14a for the voltage detection line is connected.

  As shown in FIG. 3, the voltage detection line connection plate 14a includes an insulating portion 141a that forms the main body of the connection plate 14a and a pair of conductive portions (pads) 142a and 143a formed in the insulating portion 141a. I have. The conducting parts 142a and 143a are formed so as to penetrate the upper and lower surfaces of the insulating part 141a that forms the main body part of the connection plate 14a. And the conduction | electrical_connection part 142a and the positive electrode terminal 12a of the cell 10a are mutually welded, and are electrically connected by this. Similarly, the conduction portion 143a and the cell voltage detection pin 15a connected to the voltage detection line 24a are welded to each other and are thereby electrically connected.

  In addition, the first capacitance adjusting resistor 21a is disposed between the conductive portions 142a and 143a on the connection plate 14a for the voltage detection line in a state of being electrically connected to the conductive portions 142a and 143a. . As a result, the current from the cell 10a flows from the positive electrode 12a to the voltage detection line 24a via the conduction portion 142a, the first capacitance adjusting resistor 21a, the conduction portion 143a, and the cell voltage detection pin 15a. It has become. That is, in the present embodiment, when the bypass switch 23a is turned on based on a command from the battery controller 300, the bypass current from the cell 10a is the first on the connection plate 14a disposed on the terminal electrode 12a of the cell 10a. By flowing through the capacitance adjustment resistor 21a, the second capacitance adjustment resistor 22a, and the first capacitance adjustment resistor 21b, the capacitance adjustment discharge of the cell 10a is performed. Here, the first capacitance adjusting resistor 21b is also electrically connected to the positive terminal of the cell 10b (the positive terminal of the cell 10b is electrically connected to the negative terminal of the cell 10a, similarly to the first capacitance adjusting resistor 21a. ) Is formed on a connecting plate arranged on the top.

  The cell 10d is different from the cell 10a described above in that the voltage detection line connecting plate having the first capacitance adjusting resistor 21d is connected to the positive electrode terminal, and the first electrode is connected to the negative electrode terminal. A voltage detection line connecting plate having a capacitance adjusting resistor 21e is connected.

  According to the present embodiment, the voltage detection lines 24a to 24e are connected to the cells 10a to 10d constituting the assembled battery 100 via the first capacity adjustment resistors 21a to 21e. Even when 24a to 24e are short-circuited, the short-circuit current flowing through the voltage detection lines 24a to 24e can be reduced by the resistance values of the first capacitance adjusting resistors 21a to 21e. Therefore, it is possible to effectively prevent occurrence of fusing of the voltage detection lines 24a to 24e due to a short-circuit current consisting of a large current flowing through the voltage detection lines 24a to 24e.

  Moreover, in this embodiment, about each cell 10a-10d which comprises the assembled battery 100, as a capacity | capacitance adjustment resistance which comprises the capacity | capacitance adjustment circuit 200 for performing capacity | capacitance adjustment discharge, to the electrode terminal of each cell 10a-10d The first capacity adjustment resistors 21a to 21e provided on the connected connection plates, and the second capacity adjustment resistors 22a to 22d constituting the assembled battery control device together with the battery controller 300 and the cell voltage detection circuit 400 are used. . Therefore, heat generation during capacity adjustment discharge can be dispersed, and as a result, heat generation of the second capacity adjustment resistors 22a to 22d constituting the battery pack control device can be reduced. It is possible to effectively prevent functional deterioration due to heat generation of the battery controller 300 and the cell voltage detection circuit 400 constituting the device.

  Furthermore, in this embodiment, in addition to the first capacitance adjustment resistors 21a to 21e, the second capacitance adjustment resistors 22a to 22d are used as the capacitance adjustment resistors, and these are connected in series with the bypass switches 23a to 23d. Therefore, the terminal voltage of each of the cells 10a to 10d can be detected even during the capacity adjustment discharge. Therefore, according to this embodiment, each cell 10a-10d can be controlled with higher precision.

In addition, according to this embodiment, the resistance value _{R 1} of the first capacity adjusting resistor 21 a to 21 e, and the resistance value _{R 2} of the second capacity adjusting resistors 22a to 22d, the above formula (1) to (3 ), The functions of the battery controller 300 and the cell voltage detection circuit 400 constituting the assembled battery control device due to the fusing of the voltage detection lines 24a to 24d and the heat generation of the second capacitance adjusting resistors 22a to 22d. The capacity adjustment of each cell 10a to 10d by the capacity adjustment circuit 200 can be appropriately performed while effectively preventing the deterioration.

  In the above-described embodiment, the cell voltage detection circuit 400 is the cell voltage detection means of the present invention, the first capacitance adjustment resistors 21a to 21e are the first resistance of the present invention, and the second capacitance adjustment resistors 22a to 22e. Is equivalent to the second resistor of the present invention, the bypass switches 23a to 23d are equivalent to the switch means of the invention, and the battery controller 300 is equivalent to the capacity adjusting means of the invention.

  As mentioned above, although embodiment of this invention was described, these embodiment was described in order to make an understanding of this invention easy, and was not described in order to limit this invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, in the above-described embodiment, the capacitance adjustment resistor constituting the capacitance adjustment circuit 200 is configured to include the second capacitance adjustment resistors 23a to 23d in addition to the first capacitance adjustment resistors 21a to 21e. The second capacitance adjusting resistors 23a to 23d may not be provided. In this case, when performing capacity adjustment discharge for each of the cells 10a to 10d constituting the assembled battery 100, the bypass switch corresponding to the cell that performs capacity adjustment discharge is turned on / off in a predetermined pattern. Therefore, it is preferable to perform capacity adjustment discharge in a predetermined intermittent pattern. By performing capacity adjustment discharge with a predetermined intermittent pattern, there is a state where the bypass switch is turned off even during capacity adjustment discharge, so by using the state where the bypass switch is turned off The cell voltage detection circuit 400 can measure the terminal voltage of the cell performing capacity adjustment discharge.

  In the above-described embodiment, the first capacitance adjusting resistors 21a to 21e are formed on the connection plates for voltage detection lines connected to the electrode terminals, so that the electrode terminals and the electrodes of the cells 10a to 10d However, the first capacitance adjusting resistors 21a to 21e may be arranged in the vicinity of the electrode terminals of the cells 10a to 10d. Is not particularly limited.

DESCRIPTION OF SYMBOLS 100 ... Battery pack 10a-10d ... Cell 14a ... Connection board for voltage detection lines 200 ... Capacity adjustment circuit 21a-21e ... 1st capacity adjustment resistance 22a-22d ... 2nd capacity adjustment resistance 23a-23d ... Bypass switch 24a-24d ... Voltage detection line 300 ... Battery controller 400 ... Voltage detection circuit

Claims (9)

A battery pack control device comprising a plurality of cells connected in series,
A plurality of voltage detection lines derived from electrode terminals of each cell constituting the assembled battery;
Cell voltage detection means for detecting a terminal voltage of each cell constituting the assembled battery via the voltage detection line, and
The voltage detection line is connected to the electrode terminal of each cell constituting the assembled battery via a first resistor having a predetermined resistance value provided in the vicinity of the electrode terminal of each cell constituting the assembled battery. An apparatus for controlling an assembled battery, comprising: In the assembled battery control device according to claim 1,
The plurality of voltage detection lines are connected to each other via switch means corresponding to each cell constituting the assembled battery,
By turning on the switch means, a capacity adjustment discharge is performed by causing a bypass current to flow from the cell corresponding to the switch means via the first resistor, so that the capacity between the cells constituting the assembled battery is increased. A battery pack control apparatus, further comprising capacity adjustment means for performing adjustment. The assembled battery control device according to claim 2,
The control apparatus for an assembled battery, wherein the plurality of voltage detection lines are connected to each other via switch means corresponding to each cell constituting the assembled battery and a second resistor having a predetermined resistance value. . In the assembled battery control device according to claim 3,
When the upper limit voltage of each cell constituting the assembled battery is V _MAX and the maximum value of the bypass current allowable by the plurality of voltage detection lines is I _MAX , the resistance value R ₁ of the first resistor, and the resistance value R ₂ of the second resistor, the control of the assembled battery and setting so as to satisfy the condition formula (1).
R ₁ × 2 + R ₂ ≧ V _MAX / I _MAX (1) In the control apparatus of the assembled battery of Claim 3 or 4,
When the lower limit voltage of each cell constituting the assembled battery is V _MIN and the current value necessary for capacity adjustment by the capacity adjusting means is I _A , the resistance value R ₁ of the first resistor, and the first A control apparatus for an assembled battery, wherein a resistance value R2 of _two resistors is set so as to satisfy a condition of the following formula (2).
_{R 1 × 2 + R 2 ≦} V MIN / I A (2) In the control apparatus of the assembled battery in any one of Claims 3-5,
When the upper limit voltage of each cell constituting the assembled battery is V _MAX and the amount of heat generated by the second resistor is Q, the resistance value R ₁ of the first resistor and the resistance value of the second resistor An assembled battery control device, wherein R ₂ is set to satisfy the condition of the following formula (3).
{V _MAX / (R ₁ × 2 + R ₂ )} ² ≦ Q (3) The assembled battery control device according to claim 2,
The assembled battery control device, wherein the capacity adjusting means performs capacity adjusting discharge in a predetermined intermittent pattern when adjusting the capacity of each cell constituting the assembled battery. In the control apparatus of the assembled battery in any one of Claims 1-7,
The first resistor is disposed on a connection plate including a pair of conductive portions and an insulating portion for insulating the pair of conductive portions from each other so as to connect the pair of conductive portions to each other,
The connection plate is connected to an electrode terminal of each cell constituting the assembled battery via one conductive part, and connected to the voltage detection line via the other conductive part. Control device. In the control apparatus of the assembled battery in any one of Claims 2-8,
The capacity adjusting means is configured when the current of each cell constituting the assembled battery is equal to or less than a predetermined value, when the charging rate of each cell constituting the assembled battery is within a predetermined range, or configuring the assembled battery When the temperature of each cell to perform is below a predetermined temperature, the capacity adjustment between each cell which comprises the said assembled battery is performed, The assembled battery control apparatus characterized by the above-mentioned.

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