JP2003309931A - Charging/discharging controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress variation in inter-cell voltages when charging/discharging a module battery or a battery pack comprising a plurality of unit cells connected together. <P>SOLUTION: A charging/discharging controller controls charging/discharging of a module battery 10 comprising a plurality of unit cells C1-C8 connected together. When charging with the module battery 10, a capacity adjustment is performed for suppressing variation in capacity among a plurality of unit cells, with the voltage of a unit cell whose voltage is lowest used as a target capacity adjustment value at the start of charging. When the module battery 10 is discharged, the capacity adjustment is performed at such voltage as is lower by a prescribed voltage than the voltage of a unit cell whose voltage is lowest at the start of discharging, for promoted discharging. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging / discharging control device for controlling charging / discharging of an assembled battery constituted by connecting a plurality of module batteries composed of a plurality of unit cells.

[0002]

2. Description of the Related Art In an assembled battery composed of a plurality of module batteries, when a defective module battery is replaced with a new module battery, a module battery corresponding to the average value of the capacity of remaining normal module batteries is used. Japanese Patent Laid-Open No. 11-149944 discloses a charger / discharger that calculates a voltage average value and charges or discharges the module battery so that the voltage of a new module battery to be replaced becomes the average voltage.

[0003]

However, in the conventional charge / discharge control, since the capacity of the new module battery to be replaced is set to the average value of the capacity of the module batteries not to be replaced, the replacement is required. Even if the inter-cell voltage of the module battery varies, the variation of the inter-cell voltage was not corrected.

An object of the present invention is to provide a charge / discharge control device for carrying out capacity adjustment for suppressing variation in inter-cell voltage when charging or discharging a module battery or an assembled battery composed of a plurality of unit batteries connected to each other. To do.

[0005]

(1) A first aspect of the present invention is a charge / discharge control device for controlling charge / discharge of a module battery configured by connecting a plurality of unit batteries, the module battery having a predetermined capacity. The above object is achieved by also performing capacity adjustment that suppresses capacity variations among a plurality of unit batteries that form a module battery during charging or discharging. (2) The invention of claim 2 is a charge / discharge control device for controlling charging / discharging of an assembled battery configured by connecting a plurality of unit batteries, wherein the voltage is lowest at the start of charging while the assembled battery is being charged. The unit battery voltage is used as the capacity adjustment target value to adjust the capacity to reduce the capacity variation between multiple unit batteries, and while the assembled battery is being discharged, the voltage at the start of discharge is lower than the lowest unit battery voltage by a predetermined voltage. It is characterized in that the discharge is promoted while performing the capacity adjustment with the capacity adjustment target value as. (3) The invention according to claim 3 is a charge / discharge control device for controlling charge / discharge of an assembled battery configured by connecting a plurality of unit batteries, and a voltage detecting device for detecting a voltage of the plurality of unit batteries, Each unit battery of, the capacity adjustment resistor for performing capacity adjustment to suppress the capacity variation between a plurality of unit batteries, the total voltage detection device for detecting the total voltage of the assembled battery, and the total voltage detection device Based on the detected total voltage of the assembled battery and the target voltage, it is determined that the charging / discharging determination device determines whether to charge or discharge the assembled battery, and the charging / discharging determination device determines to charge the assembled battery. When the charging is started, it is determined that the lowest voltage among the voltages detected by the voltage detection device at the start of charging is used as the capacity adjustment target value to control the capacity adjustment resistor, and the charge / discharge determination device discharges the assembled battery. Sometimes let go Characterized in that it comprises a voltage detection device by the capacity adjusting resistor control device for controlling the capacity adjusting resistor a predetermined voltage lower voltage than the lowest voltage among the detected voltage as a capacity adjustment target value at the start. (4) The invention according to claim 4 is the charge / discharge control device according to claim 3, wherein a discharge promotion period calculation device for calculating a period for promoting discharge using all the capacity adjusting resistors at the time of charging the assembled battery; The capacity adjustment resistance control device further includes a voltage estimation device that estimates the voltages of the plurality of unit batteries after the period calculated by the period calculation device has elapsed, and the charge / discharge determination device determines that the assembled battery is to be discharged. Sometimes, after the discharge is promoted by using all the capacity adjustment resistors during the period calculated by the discharge promotion period calculation device, the lowest voltage among the voltages estimated by the voltage estimation device is set as the capacity adjustment target value. It is characterized by controlling the adjustment resistance. (5) The invention according to claim 5 is the charge / discharge control device according to any one of claims 2 to 4, which controls charging / discharging of a module battery configured by connecting a plurality of unit batteries instead of the assembled battery. It is characterized by

[0006]

EFFECTS OF THE INVENTION (1) According to the present invention, while the module battery is charged or discharged, the capacity adjustment for suppressing the capacity variation between the unit batteries is also performed. Therefore, the capacity variation between the cells after charging or discharging is performed. Can be eliminated. (2) According to the inventions of claims 2 to 5, while charging the assembled battery, the voltage of the unit battery having the lowest voltage at the start of charging is set as the capacity adjustment target value, and while discharging the assembled battery, discharging is started. At the same time, a voltage lower than the voltage of the lowest unit battery by a predetermined voltage is used as the capacity adjustment target value to promote the discharge while adjusting the capacity, thus eliminating the variation in the capacity between cells after charging or discharging, and at the time of discharging during discharging. Can be shortened.

[0007]

1 is a diagram showing the configuration of an embodiment of a system for charging / discharging an assembled battery using a charge / discharge control device according to the present invention. The assembled battery is configured by connecting a plurality of module batteries in series, but in FIG. 1, only one module battery 10 is shown. The module battery 10 is configured by connecting eight cells C1 to C8 in series. Each of the cells C1 to C8 has a capacitance adjustment resistor R1 to R1.
8 is connected to the capacitance adjusting circuit 50, and the capacitance can be adjusted for each cell. The cell voltage detection circuit 60 detects the voltages of the cells C1 to C8 and detects the CPU 20.
Send to.

The CPU 20 has a ROM 30 and a RAM 4
It is connected to 0 and collects and manages various information such as the voltages of the cells C1 to C8 constituting the module battery 10 and the temperature of the module battery 10 detected by the temperature sensor 70. Various information managed by the CPU 20 can be transmitted to the CPU 110 of the charger 100 via the control connector 310. Further, the CPU 20 is the charger side CPU 11
The capacity adjustment circuit 50 is controlled based on the command from 0.

A timer 120, a RAM 130, a ROM 140, a main switch 150, a buzzer 160, a keyboard 170, a display 180, a voltage sensor 200, a current sensor 210, a switching circuit 220, and a main relay 250 are connected to the CPU 110 of the charger 100. There is. The timer 120 measures the charging / discharging required time of the module battery 10 and the capacity adjustment required time of each cell C1-C8.
Each cell C transmitted from the CPU 20 is stored in the RAM 130.
The voltages of 1 to C8, the module total voltage, and the like are stored.

The main switch 150 is a power switch of the charger 100. The buzzer 160 informs the operator of abnormality of the assembled battery (module battery 10), completion of charging / discharging of the module battery 10, and the like. The keyboard 170 has a target voltage value and a module battery 10 when the operator adjusts the capacity.
Is an input device for inputting a charge / discharge start command and a forced end command. The display 180 includes real-time data such as a charge / discharge target voltage (set value) of the module battery 10, a voltage value, a current value, and a capacity adjustment required time of the module battery 10 during charging / discharging, a charger and the module battery 10.
Display abnormalities, etc.

The main relay 250 controls on / off of a high voltage line 320 connected to the module battery 10 via the high voltage connector 300 based on a command from the CPU 110. The voltage sensor 200 is the module battery 1
The total voltage of 0 is detected and transmitted to the CPU 110. The current sensor 210 detects the charging / discharging current of the module battery 10 and transmits it to the CPU 110.

The switching circuit 220 switches the connection between the charging circuit 230 and the discharging circuit 240 based on a command from the CPU 110. The CPU 110 determines charge / discharge based on the difference between the charge / discharge target voltage and the voltage detected by the voltage sensor 200. The discharge resistance 260 is a resistance for controlling the charging / discharging current when the module battery 10 is charged / discharged.

FIG. 2 and FIG. 3 are flowcharts of an embodiment showing a control procedure for charge / discharge control of the module battery 10. The process starting from step S10 is performed by the CPU 110 of the charger 100. In step S10, it is determined whether the main switch 150 is turned on. When the ON signal is sent from the main switch 150, it is determined that the main switch 150 is turned on and the process proceeds to step S20. If it is determined that the main switch 150 is not turned on, the process waits at step S10 until it is turned on.

In step S20, the high-voltage line 320 is connected to the high-voltage circuit to which high-voltage (high voltage) is applied, and the low-voltage system (control system) to which low-voltage (low voltage) is applied is not directly connected to the high-voltage circuit. Perform system check of the circuit. For example, if there is no leakage in the high-voltage circuit,
Watchdog timer (WD)
T) self-diagnosis of the CPU 110 itself is performed. When the system check is performed, the process proceeds to step S30. In step S30, based on the result of the system check performed in step S20, it is determined whether or not there is an abnormality in the strong electric system circuit and the weak electric system circuit. If it is determined that there is an abnormality, the process proceeds to step S320 (FIG. 3), and if it is determined that there is no abnormality, the process proceeds to step S40.

In step S40, the control connector 310
CPU 20 that manages the module battery 10 via the
Requesting that the voltage values of the cells C1 to C8 be transmitted. In the next step S50, C on the module side
It is determined whether or not the voltages of the cells C1 to C8 have been transmitted from the PU 20. If it is determined that each cell voltage has been transmitted, the process proceeds to step S60. If it is determined that each cell voltage has not been transmitted, the process waits until it is transmitted.

In step S60, each received cell C1
The voltages of C8 to C8 are stored in the RAM 130, and step S70 is performed.
Proceed to. In step S70, the total voltage of the module battery 10 is calculated by adding the voltages of the cells C1 to C8 received in step S50. Since the main relay 250 is off at this point, the total voltage of the module battery 10 cannot be detected using the voltage sensor 200. When the total voltage of the module battery 10 is calculated, the process proceeds to step S80. In step S80, the total voltage of the module battery 10 calculated in step S70 is stored in the RAM 130, and the process proceeds to step S90.

In step S90, the display 180 prompts the operator to input the target voltage value of the module battery 10. In the next step S100, it is determined whether or not the target voltage value has been input by the operator.
When it is determined that the target voltage value is input, step S110
If it is determined that no input has been made, the process proceeds to step S90.
Return to. In step S110, RA in step S80
Based on the difference between the total voltage of the module battery 10 stored in M130 and the target voltage value input in step S100, the charging time or discharging time for performing charging / discharging according to a predetermined charging / discharging pattern is set. Calculate The temperature of the module battery 10 detected by the temperature sensor 70 is taken into consideration when calculating the charging time or the discharging time. When the charge time or the discharge time is calculated, the process proceeds to step S120.

In step S120, step S110
Whether the calculation result of is the charging time or the discharging time,
That is, it is determined whether to charge or discharge.
If the total voltage of the module battery 10 calculated in step S70 is larger than the target voltage value, it is determined that discharging is performed. If the total voltage of the module battery 10 is equal to or less than the target voltage value, it is determined that charging is performed. When it is determined in step S120 that charging is to be performed, the process proceeds to step S130, and when it is determined that discharging is to be performed, the process proceeds to step S160.

In step S130, the cell having the lowest voltage value (hereinafter referred to as the lowest cell) is specified based on the cell voltages stored in the RAM 130 in step S60.
When the lowest cell is specified, the process proceeds to step S140. In step S140, the difference between the voltage of the lowest cell specified in step S130 and the voltage of the cells other than the lowest cell is calculated. When the voltage difference with the other cells except the lowest cell is calculated for each cell, the process proceeds to step S150.

In step S150, step S140
Based on the voltage difference calculated in step 3, the time for performing the capacity adjustment for each cell, that is, the time for performing the discharge using the capacity adjusting circuit 50 is calculated. The capacity adjustment time for the voltage difference calculated in step S140 is stored in the ROM 140. The larger the voltage difference calculated in step S140, the longer the capacity adjustment time, and the smaller the voltage difference, the shorter the capacity adjustment time. When the capacity adjustment time for each cell is calculated, the process proceeds to step S200 (FIG. 3).

When it is determined in step S120 that discharging is to be performed and the process proceeds to step S160, the time for turning on the capacitance adjusting circuit 50 is calculated. At the time of discharging, in addition to the discharging by the discharging circuit 240, the discharging is promoted by energizing all the discharging resistors R1 to R8. However, if all the capacitance adjustment circuits 50 are turned on during the entire period of discharging, the capacitance adjustment itself cannot be performed, so all the capacitance adjustment circuits 50 are turned on only for a predetermined period. In step S160, this predetermined period is calculated by multiplying the discharge time calculated in step S110 by a predetermined coefficient.

For example, if the discharge time is 5 hours and the above-mentioned coefficient is 0.8 (80%), the discharge by the discharge circuit 240 and the discharge resistor 260 and all the capacitance adjusting circuits 50 are turned on for 4 hours after the start of discharge. Discharge is performed, and the discharge circuit 240 and the discharge resistor 2 are used for the remaining 1 hour.
Discharge by 60 is performed. Further, when discharging is performed during the remaining one hour, the capacitance adjustment circuit 50 uses the capacitance adjustment circuit 50 to perform the capacitance adjustment for correcting the voltage variations of the cells C1 to C8.

The final termination of charging / discharging is not determined by time, but is terminated when the target voltage value input by the operator becomes equal to the voltage value of the module battery 10 detected by the voltage sensor 200. Therefore, in the above-mentioned example, the remaining discharge time after discharging for 4 hours may not be 1 hour. That is, step S110
Since the discharge is quickly performed by turning on all the capacitance adjustment circuits 50 for a predetermined time with respect to the discharge time calculated in step 3, the discharge may end earlier than the discharge time calculated in advance. Below, all the capacitance adjustment circuits 50
The time during which the power is turned on is called the discharge auxiliary time.

When the discharge auxiliary time is calculated in step S160, the process proceeds to step S170. In step S170, the voltages of all the cells C1 to C8 at the end of the discharge assisting time calculated in step S160 are estimated, and the cell with the lowest estimated voltage is specified (estimated). When the lowest cell at the end of the discharge assist long time is specified,
It proceeds to step S180. In step S180, the difference between the voltage of the lowest cell specified in step S170 and the estimated voltage of other cells excluding the lowest cell is calculated. When the estimated voltage difference from the other cells except the lowest cell is calculated for each cell, the process proceeds to step S190.

In step S190 in FIG. 3, step S
Based on the voltage difference calculated in 180, the time for performing the capacity adjustment for each cell, that is, the time for performing the discharge using the capacity adjusting circuit 50 is calculated. The calculation method is step S1.
Since it is the same as the method of calculating the capacity adjustment time at 50,
Detailed explanation is omitted. When the capacity adjustment time for each cell is calculated, the process proceeds to step S200.

In step S200, the display 18
A message indicating that charging and discharging of the module battery 10 is started is displayed at 0. In the next step S210, it is determined whether the operator inputs a command to start charging / discharging the module battery 10 from the keyboard 170. If it is determined that the command is input, the process proceeds to step S220, and if it is determined that the command is not input, the process returns to step S200.

In step S220, the main relay 25
0 is turned on, and the process proceeds to step S230. Step S
In 230, either the charging circuit 230 or the discharging circuit 240 is connected by turning on the changeover switch 220 based on the charge / discharge determination result performed in step S120. Charge circuit 230 or discharge circuit 24
If either one of 0 is connected, the process proceeds to step S240. In step S240, the timer 120 is reset and then started in order to measure the elapsed time from the start of charging or discharging the module battery 10. When the timer is started, the process proceeds to step S250.

In step S250, the voltage sensor 200
The total voltage of the module battery 10 is detected by. The detected total voltage of the module battery 10 is transmitted to the CPU 110. In the next step S260, the current sensor 210
Thus, the charging / discharging current flowing in the module battery 10 is detected. The charge / discharge current detected by the current sensor 210 is the CPU
When it is transmitted to 110, the process proceeds to step S270. In step S270, the charging / discharging time calculated in step S110 and the timer 12 started in step S240.
The remaining charge time or discharge time is calculated by comparing the charge / discharge time measured with 0. When the remaining charge time or discharge time is calculated, the process proceeds to step S280.

At step S280, step S110.
The charging / discharging time calculated in step S150, the capacity adjustment time calculated in step S150 or step S190, and the discharge auxiliary time calculated in step S160 during discharging are transmitted to the CPU 20 on the module battery 10 side. Next step S2
At 90, the charging / discharging time calculated at step S110, the remaining charging / discharging time calculated at step S270, and
The display 18 shows the total voltage and charge / discharge current of the module battery 10 detected in steps S250 and S260, respectively.
Display at 0. As a result, the operator can know the charge / discharge status of the module battery 10 in real time.

In step S300, it is determined whether the operator has input a command to forcibly terminate the charging / discharging from the keyboard 170. If it is determined that the forced termination command has been input, the process proceeds to step S310, and if it is determined that it has not been input, the process proceeds to step S330. In step S330, in addition to the control program, interrupt processing by the abnormality detection program is performed at predetermined time intervals,
It is determined whether an abnormality has occurred. If it is determined that an abnormality has occurred, the process proceeds to step S310, and if it is determined that no abnormality has occurred, the process proceeds to step S340.

When the forced termination command is input or when an abnormality occurs, the process proceeds to step S310, so the main relay 250 is turned off in step S310, and the process proceeds to step S320. In step S320, when the forced termination command is input, to that effect, and when an abnormality occurs in step S30 or step S330, the content of the abnormality is displayed on the display 180, and this control ends.

In step S340, the voltage sensor 200
The total voltage of the module battery 10 detected in step S is
It is determined whether the target voltage value input at 100 is reached. If it is determined that the actual total voltage of the module battery 10 has reached the target voltage value, the process proceeds to step S350, and if it is determined that the target voltage value has not been reached, the process returns to step S250. In step S350, the fact that the charging or discharging of the module battery 10 is finished is displayed on the display 180, and this control is finished.

FIG. 4 is a flow chart of an embodiment showing a control procedure performed by the CPU 20 which manages the module battery 10. In step S500, the CPU 110 on the charger 100 side requests transmission of the voltage values of the cells C1 to C8 (step S40 in the flowchart of FIG. 2).
It is determined whether or not there is. If it is determined that there is a cell voltage transmission request, the process proceeds to step S510, and if it is determined that there is no transmission request, the process waits at step S500 until the voltage transmission request signal is received.

In step S510, the cell voltage detection circuit 60 detects the voltages of the cells C1 to C8, and the flow advances to step S520. In step S520, the cell voltage detected in step S510 is transmitted to the charger-side CPU 110. In the next step S530, the charger CPU
110 is step S28 of the flowchart shown in FIG.
It is determined whether or not the data such as the charging / discharging time and the capacity adjustment time transmitted at 0 is received. If it is determined that the data such as the charge / discharge time has been received, the process proceeds to step S540, and if it is determined that the data has not been received, the process waits until the data is received.

In step S540, capacity adjustment is performed for each cell. For example, when the module battery 10 is charged, the capacity adjustment circuit 50 is operated based on the capacity adjustment time for each cell received in step S530, that is,
The capacitance is adjusted for each cell using the capacitance adjusting resistors R1 to R8. Further, when the module battery 10 is discharged, all the capacity adjusting circuits 50 are turned on to accelerate the discharge during the discharge assisting time, and after the discharge assisting time has elapsed, the step S5 is performed.
Based on the capacity adjustment time received at 30, the capacity adjustment is performed using the capacity adjustment circuit 50 for each cell.

According to the charging control device of the present invention, at the time of charging, the charging circuit 23 is based on the difference between the total voltage of the module battery 10 and the target voltage value input by the operator.
While calculating the charging time using 0 (step S1
10), based on the voltage difference between the cell having the lowest voltage value at the time of charging time calculation (when the main switch is turned on) and other cells,
The capacity adjustment time is calculated for each cell (step S15).
0). On the other hand, at the time of discharging, the discharging time using the discharging circuit 240 is calculated based on the difference between the total voltage of the module battery 10 and the target voltage value (step S11).
0), the auxiliary discharge long time for turning on all the capacitance adjusting circuits 50 is calculated (step S160). Further, the cell having the lowest voltage after the discharge auxiliary time has elapsed is estimated, and the capacity adjustment time is calculated based on the estimated voltage difference between this lowest cell and another cell (step S190).

That is, since the capacity adjusting circuit 50 is not operated for purposes other than capacity adjustment during charging, the capacity adjusting time can be determined based on the voltage difference between the lowest cell and the other cells when the main switch is turned on. it can. However, at the time of discharging, all the capacity adjusting circuits 50 are operated during the discharge assisting time, so the voltage difference between the lowest cell and the other cells after the discharge assisting time has passed is the voltage between the lowest cell and the other cells when the main switch is turned on. It is likely different from the difference. Therefore, at the time of discharging, the voltages of the cells C1 to C8 after the discharge-assisted long time has elapsed are estimated (step S170), and the capacity adjustment time is calculated based on the estimated voltage difference between the lowest cell and the other cells after the discharge-assisted long time has elapsed. I have decided. That is, at the time of discharging, the capacity is adjusted by setting a voltage lower than the voltage of the cell having the lowest voltage at the start of discharging by a predetermined voltage as the capacity adjustment target value.

By the charge / discharge control described above, the cells C1 to C8 during charging or discharging of the module battery 10 are performed.
It is possible to suppress a voltage difference between the two. Also,
At the time of discharging, all the capacity adjusting circuits 50 are operated for a predetermined time (discharge assisting time), so that the discharging time can be shortened as compared with the case of discharging only by using the discharging circuit 240.

The present invention is not limited to the above-mentioned embodiment. For example, in the embodiment described above,
A module battery 1 composed of a plurality of module batteries
In the assembled battery in which charge and discharge are managed for each 0, the case where the module battery 10 is charged or discharged as one unit has been described, but the present invention can be applied to the case where the assembled battery is charged or discharged as a whole. Further, although the operator inputs the target voltage value for charging and discharging the module battery 10 from the keyboard 170, the average value of the total voltage of other module batteries may be used as the target value. That is, the present invention is not limited to the method of setting the target voltage value for charging / discharging.

Further, in step S90 of the flow chart shown in FIG. 2, a display prompting the operator to input the target voltage value is displayed, but the target charging rate (SOC) of the module battery 10 is displayed.
A display prompting the input of may be displayed. In this case, charger side C
PU110 calculates a target voltage value based on the input target charging rate.

The correspondence relationship between the constituent elements of the claims and the constituent elements of the embodiment is as follows. That is,
The cells C1 to C8 are unit batteries, the cell voltage detection circuit 60 is a voltage detection device, the cell voltage detection circuit 60 and the CPU 2
0 is a total voltage detection device, capacity adjustment resistors R1 to R8 are capacity adjustment resistors, CPU 110 is a charge / discharge determination device, discharge promotion period calculation device and voltage estimation device, and CPU 20 and CPU 110 are capacity adjustment resistance control devices. To do. Note that each component is not limited to the above configuration as long as the characteristic function of the present invention is not impaired.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a system for charging / discharging an assembled battery using a charge / discharge control device according to the present invention.

FIG. 2 is a flowchart of an embodiment showing a control procedure performed by the CPU on the charger side.

FIG. 3 is a flowchart of an embodiment showing a control procedure following the flowchart shown in FIG.

FIG. 4 is a flowchart of an embodiment showing a control procedure performed by a module battery side CPU.

[Explanation of symbols]

10 ... Module battery, 20 ... Module battery side CP
U, 30 ... ROM, 40 ... RAM, 50 ... Capacitance adjustment circuit, 60 ... Cell voltage detection circuit, 70 ... Temperature sensor, 10
0 ... Charger, 110 ... Charger side CPU, 120 ... Timer, 130 ... RAM, 140 ... ROM, 150 ... Main switch, 160 ... Buzzer, 170 ... Keyboard, 18
0 ... Display, 200 ... Voltage sensor, 210 ... Current sensor, 220 ... Switching circuit, 230 ... Charging circuit, 240
... discharge circuit, 250 ... main relay, 260 ... discharge resistance, 300 ... high-voltage connector, 310 ... control connector, 3
20 ... High-voltage line, C1-C8 ... Cell, R1-R8 ... Capacitance adjustment resistor

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2G016 CA00 CC01 CC03 CC04 CC06                       CC07 CC10 CC12 CC23 CC25                       CC27 CC28 CD14 CE00 CE07                       CF06                 5G003 AA01 BA03 CA11 CC02 DA07                       GC05                 5H030 AA03 AA04 BB01 BB21 FF43                       FF44

Claims (5)

[Claims] 1. A charging / discharging control device for controlling charging / discharging of a module battery configured by connecting a plurality of unit batteries, wherein the module battery is configured while charging or discharging the module battery to a predetermined capacity. A charging / discharging control device, which also performs capacity adjustment for suppressing capacity variations among the plurality of unit batteries. 2. A charging / discharging control device for controlling charging / discharging of an assembled battery constituted by connecting a plurality of unit batteries, wherein during charging of the assembled battery, the voltage of the unit battery having the lowest voltage at the start of charging. The capacity adjustment is performed with the capacity adjustment target value as a capacity adjustment to suppress the capacity variation between the plurality of unit batteries, and while the assembled battery is being discharged, a voltage lower than the voltage of the unit battery having the lowest voltage at the start of discharge by a predetermined voltage is used as the capacity. A charging / discharging control device that accelerates the discharge while performing the capacity adjustment as an adjustment target value. 3. A charging / discharging control device for controlling charging / discharging of an assembled battery constituted by connecting a plurality of unit batteries, a voltage detecting device for detecting a voltage of the plurality of unit batteries, and the plurality of unit batteries. A capacity adjustment resistor for performing capacity adjustment that suppresses capacity variations between the plurality of unit batteries, a total voltage detection device that detects a total voltage of the assembled battery, and a total voltage detection device. Based on the detected total voltage and target voltage of the assembled battery, a charging / discharging determination device that determines whether to charge or discharge the assembled battery, and to charge the assembled battery by the charging / discharging determination device. When it is determined to do, while controlling the capacity adjustment resistor with the lowest voltage among the voltages detected by the voltage detection device at the start of charging as the capacity adjustment target value, the charge / discharge determination device When it is determined that the battery pack is to be discharged, a voltage lower by a predetermined voltage than the lowest voltage detected by the voltage detection device at the start of the discharge is set as the capacity adjustment target value, and the capacity adjustment resistor is set. A charge / discharge control device, comprising: a capacity adjustment resistance control device for controlling. 4. The charging / discharging control device according to claim 3, wherein the discharging promotion period calculation device calculates a period during which the discharge is promoted by using all the capacity adjusting resistors when the assembled battery is discharged, Further comprising a voltage estimation device that estimates the voltages of the plurality of unit batteries after the period calculated by the promotion period calculation device, wherein the capacity adjustment resistance control device discharges the assembled battery by the charge / discharge determination device. When it is determined to be performed, after promoting the discharge by using all the capacity adjustment resistors during the period calculated by the discharge promotion period calculation device, the most of the voltages estimated by the voltage estimation device is calculated. A charging / discharging control device which controls the capacity adjusting resistor with a low voltage as a capacity adjusting target value. 5. The charging / discharging control device according to claim 2, wherein the charging / discharging of a module battery configured by connecting a plurality of unit batteries instead of the assembled battery is controlled. A characteristic charge / discharge control device.