JP2015035382A - Control device, system and control method for secondary battery, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the progress of deterioration in a secondary battery and make the secondary battery into an appropriate temperature before the start of operation of the secondary battery irrespective of the capacity of the secondary battery before the start of operation.SOLUTION: When an instruction reception unit 141 receives an instruction to start the operation of the secondary battery 120, a charge/discharge control unit 144 causes a secondary battery 120 to repeat charging at a charge rate for preparation and discharging at a discharge rate for preparation if the temperature of the secondary battery 120, acquired by a temperature acquisition unit 142, is lower than a first temperature threshold. At least one of the charge and the discharge rates for preparation is lower than a preset charge or discharge rate for ordinary operation.

Description

  The present invention relates to a secondary battery control device, a secondary battery system, a secondary battery control method, and a program.

  When operating a secondary battery such as a lithium ion secondary battery in a state where the outside air temperature is low such as in a cold region, the operation is started after the secondary battery is warmed to the operating temperature. This is because when the temperature of the secondary battery is lower than the operating temperature, the performance of the secondary battery cannot be fully exhibited.

  Patent Document 1 discloses a technique for increasing the battery temperature at a current value larger than the current value set during normal charging in order to ensure a sufficient charge amount of the secondary battery even in a cold environment without using a heater. Has been.

JP 2012-23836 A

In general, it is considered that when a secondary battery is charged and discharged at a current equivalent to that during normal operation in a state where the ambient temperature of the secondary battery is less than 0 degrees Celsius, the deterioration of the secondary battery is remarkably advanced. Therefore, when the battery temperature is raised based on the technique described in Patent Document 1, there is a possibility that the secondary battery will deteriorate. In the case of a battery that requires a longer life, the operating conditions for which such deterioration proceeds need to be more limited.
An object of the present invention is to provide a secondary battery control device, a secondary battery system, a secondary battery, which suppresses the progress of deterioration of the secondary battery and sets the temperature of the secondary battery to an appropriate temperature at the start of operation of the secondary battery. A battery control method and program are provided.

  The first aspect includes an instruction receiving unit that receives an instruction to start operation of the secondary battery, a temperature acquisition unit that acquires the temperature of the secondary battery, and a charge / discharge control unit that controls charging / discharging of the secondary battery; The charge / discharge control unit includes the second controller when the temperature acquired by the temperature acquisition unit is less than a predetermined first temperature threshold when the instruction reception unit receives an operation start instruction. Repeatedly perform a warm-up operation in which the secondary battery is charged with a predetermined first electric quantity at a predetermined preparatory charge rate and discharged with a predetermined second electric quantity at a predetermined preparatory discharge rate. And at least one of the preparation charge rate or the preparation discharge rate is lower than a predetermined normal operation charge rate or a predetermined normal operation discharge rate. is there.

  The second mode is the first mode, wherein the charge / discharge control unit is configured such that the temperature acquired by the temperature acquisition unit when the instruction reception unit receives an operation start instruction is the first temperature threshold value. The secondary battery is controlled to cause the secondary battery to charge at the preparatory charge rate after causing the secondary battery to discharge at the preparatory discharge rate. Device.

  Further, a third aspect is the first or second aspect, wherein the charge / discharge control unit is configured such that the temperature acquired by the temperature acquisition unit when the instruction reception unit receives an operation start instruction is the first temperature. In the secondary battery control device, the secondary battery is not charged and discharged when the temperature is lower than a predetermined second temperature threshold lower than the temperature threshold.

  In a fourth aspect according to any one of the first to third aspects, the charge / discharge control unit performs charging of the secondary battery at the preparation charge rate and discharge at the preparation discharge rate. The secondary battery control device causes the secondary battery to perform until the temperature acquired by the temperature acquisition unit is equal to or higher than a predetermined third temperature threshold higher than the first temperature threshold. .

  Moreover, a 5th aspect is equipped with the air-conditioning determination part which determines whether there is a failure in the air-conditioning equipment which controls the atmospheric temperature of the said secondary battery provided in the closed space or the building in a 4th aspect. When the air conditioning determination unit determines that the air conditioning facility has a failure, the temperature acquisition unit acquires the charge at the preparation charge rate and the discharge at the preparation discharge rate. Operation until the instruction receiving unit receives a charge / discharge command for normal operation, after causing the secondary battery to perform the operation until the temperature reaches a predetermined fourth temperature threshold higher than the third temperature threshold. When the temperature acquired by the temperature acquisition unit during standby is less than a third temperature threshold, charging at the preparatory charge rate and discharging at the preparatory discharge rate are performed as the secondary. Characterized by letting the battery do Which is the next battery control device.

  Further, a sixth aspect is any one of the first to fifth aspects, wherein the charge / discharge control unit sets the first amount of electricity when the charge rate of the secondary battery is lower than a predetermined target value. If the secondary battery is charged / discharged so as to increase the charging rate by increasing the charging rate from the second amount of electricity, and the charging rate of the secondary battery is higher than a predetermined target value, the second amount of electricity The secondary battery control device causes the secondary battery to charge and discharge so that the charging rate is reduced by increasing the amount of electricity to the first amount of electricity.

  A seventh aspect includes a rate determination unit that determines the preparation charge rate and the preparation discharge rate based on the temperature acquired by the temperature acquisition unit in any one of the first to sixth aspects. The charge / discharge control unit warms up the secondary battery when the temperature acquired by the temperature acquisition unit when the instruction reception unit receives an operation start instruction is less than a first temperature threshold. A secondary battery control device characterized by causing the operation to repeatedly perform charging at the preparatory charge rate determined by the rate determining unit and discharging at the preparatory discharge rate determined by the rate determining unit. It is.

  An eighth aspect is a secondary battery system including a secondary battery and the secondary battery control device according to any one of the first to seventh aspects.

  The ninth aspect includes a step of receiving an instruction to start operation of the secondary battery system, a step of acquiring the temperature of the secondary battery when the instruction to start operation is received, and the acquired temperature When the temperature is less than a predetermined first temperature threshold, the secondary battery is charged with a predetermined first electric quantity at a predetermined preparation charge rate and predetermined at a predetermined preparation discharge rate. Repeatedly performing a warm-up operation for discharging the second amount of electricity, wherein at least one of the preparatory charge rate or the preparatory discharge rate is a predetermined normal operation charge rate or a preliminarily The secondary battery control method is characterized by being lower than a predetermined normal operation discharge rate.

  The tenth aspect includes an instruction receiving unit that receives an instruction to start operation of the secondary battery, a temperature acquisition unit that acquires the temperature of the secondary battery, and a charge / discharge control unit that controls charging / discharging of the secondary battery. The computer is operated, and the charge / discharge control unit, when the temperature acquired by the temperature acquisition unit when the instruction reception unit receives an operation start instruction is less than a predetermined first temperature threshold, A warm-up operation in which the secondary battery is charged with a predetermined first electric quantity at a predetermined preparatory charging rate and discharged with a predetermined second electric quantity at a predetermined preparatory discharge rate. The program is repeatedly executed, and at least one of the preparation charge rate or the preparation discharge rate is lower than a predetermined normal operation charge rate or a predetermined normal operation discharge rate. A.

  According to at least one of the above aspects, there is an effect that the temperature of the secondary battery can be set to an appropriate temperature at the start of operation of the secondary battery while suppressing the progress of deterioration of the secondary battery. be able to.

It is a schematic block diagram which shows the structure of the secondary battery system which concerns on at least 1 embodiment. It is a flowchart which shows the starting operation | movement of the secondary battery system which concerns on at least 1 embodiment. It is a flowchart which shows operation | movement of the warming-up operation | movement of the secondary battery system which concerns on at least 1 embodiment. It is a schematic block diagram which shows the structure of the secondary battery system which concerns on at least 1 embodiment. It is a flowchart which shows operation | movement of the warming-up operation | movement of the secondary battery system which concerns on at least 1 embodiment. It is a graph which shows an example of transition of the charging rate of a rechargeable battery. It is a schematic block diagram which shows the structure of the secondary battery system which concerns on at least 1 embodiment. It is a flowchart which shows operation | movement of the warming-up operation | movement of the secondary battery system which concerns on at least 1 embodiment. It is a figure which shows an example of transition of the change of the temperature of a secondary battery. It is a schematic block diagram which shows the structure of the secondary battery system which concerns on at least 1 embodiment. It is a flowchart which shows the starting operation | movement of the secondary battery system which concerns on at least 1 embodiment. It is a schematic block diagram which shows the structure of the computer which concerns on at least 1 embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings.
<< First Embodiment >>
FIG. 1 is a schematic block diagram showing a configuration of a secondary battery system 100 according to at least one embodiment. In FIG. 1, a solid line indicates a power line, and a broken line indicates a data line.
The secondary battery system 100 according to the first embodiment performs smoothing of natural energy power generation using a solar power generation device or the like. Specifically, the secondary battery system 100 recharges and recharges the secondary battery 120 to reduce fluctuations in the power generated by the natural energy power generation.

Secondary battery system 100 includes air conditioning equipment 110, secondary battery 120, converter 130, secondary battery control device 140, and temperature sensor 150.
The air conditioning equipment 110 controls the ambient temperature of the secondary battery 120 provided in a closed space or a building. In addition, the air conditioning equipment 110 is supplied with power from an AC voltage source such as the power system 190.
Secondary battery 120 charges power supplied from power system 190 or a power generation device (not shown) via converter 130. Further, the secondary battery 120 discharges power supplied to the power system 190 and a load device (not shown) via the converter 130. The secondary battery 120 may be a battery module including a plurality of cell batteries, for example.
Converter 130 converts alternating current into direct current and supplies it to secondary battery 120. In addition, converter 130 converts a direct current discharged by secondary battery 120 into an alternating current.
The secondary battery control device 140 manages charge / discharge of the secondary battery 120 by controlling the converter 130 according to the state of the secondary battery 120. The secondary battery control device 140 may be, for example, a BMU (Battery Management Unit) that controls a battery module. Further, the secondary battery control device 140 may be, for example, a higher-level device of BMU.
The temperature sensor 150 measures the temperature of the secondary battery 120 and outputs it to the secondary battery control device 140. The secondary battery 120 according to the present embodiment is not particularly limited, such as a lead secondary battery and a nickel metal hydride secondary battery, in addition to a lithium secondary battery, but has good followability to a charge / discharge command, and the temperature of the secondary battery is high. A lithium secondary battery is preferable because of the importance of managing deterioration of the secondary battery due to charge and discharge when the battery is low.

The secondary battery control device 140 includes an instruction reception unit 141, a temperature acquisition unit 142, a charge rate estimation unit 143, and a charge / discharge control unit 144.
The instruction receiving unit 141 receives an input of an instruction to start operation of the secondary battery 120 by an administrator of the secondary battery system 100. An instruction to start operation of the secondary battery 120 is input when the secondary battery system 100 that has been disconnected from the power system 190 due to maintenance or the like is inserted into the power system 190. As an example of input of an instruction to start operation of the secondary battery 120, for example, when the user inserts the battery system 100 into the power system 190, the user presses a button or the like provided in the secondary battery system 100. Can be entered. In addition, for example, the instruction receiving unit 141 can receive an input of an operation start instruction by detecting a change in voltage that occurs when the user inserts the secondary battery system 100 into the power system 190.

The temperature acquisition unit 142 acquires the temperature of the secondary battery 120 from the temperature sensor 150. The temperature sensor 150 is preferably installed at a position where the temperature of the cell portion in the secondary battery 120 can be acquired.
The charging rate estimation unit 143 estimates the charging rate of the secondary battery 120.
The charging / discharging control unit 144 charges the secondary battery 120 based on the temperature acquired by the temperature acquisition unit 142 and the charging rate estimated by the charging rate estimation unit 143 and predetermined first to third temperature thresholds. Control the discharge.

  Specifically, when the temperature of the secondary battery 120 is lower than the first temperature threshold, the charge / discharge control unit 144 performs secondary operation at a predetermined preparation charge rate and a predetermined preparation discharge rate. By charging / discharging the battery 120, a warm-up operation is performed in which the secondary battery 120 generates heat. The first temperature threshold is a temperature that is not appropriate for charging / discharging the secondary battery 120. In this embodiment, 0 degrees Celsius is adopted as the first temperature threshold.

  In addition, the preparation charge rate and the preparation discharge rate are a charge rate and a discharge rate at which deterioration does not occur when the secondary battery 120 having a temperature lower than the first temperature threshold is charged / discharged. In the present embodiment, “0.5 C” is adopted as the preparation charge rate, and “1 C” is adopted as the preparation discharge rate. Note that “1C” indicates a current value such that charging or discharging is completed in one hour when the secondary battery 120 is charged or discharged at a constant current. Note that the normal operation charge rate and the normal operation discharge rate that are predetermined as the charge rate and discharge rate during normal operation are both 2C.

  Further, the charge / discharge control unit 144 does not perform the warm-up operation when the temperature of the secondary battery is lower than the second temperature threshold. The second temperature threshold is a temperature at which a failure may occur due to charging / discharging of the secondary battery 120. In the present embodiment, −20 degrees Celsius is adopted as the second temperature threshold.

  Moreover, the charge / discharge control part 144 complete | finishes warming-up operation, when the temperature of a secondary battery becomes more than a 3rd temperature threshold value by performing warming-up operation. The third temperature threshold is a minimum temperature suitable for charging / discharging the secondary battery 120. In this embodiment, 15 degrees Celsius is adopted as the third temperature threshold.

FIG. 2 is a flowchart showing a start-up operation of the secondary battery system 100 according to at least one embodiment.
When the secondary battery system 100 disconnected from the power system 190 due to maintenance or the like is inserted into the power system 190 and the administrator inputs an operation start instruction to the secondary battery control device 140, the secondary battery control device 140. The instruction receiving unit 141 receives an input of the instruction (step S201). At this time, the administrator causes the air conditioning equipment 110 to start controlling the ambient temperature of the secondary battery 120 so that the temperature of the secondary battery 120 becomes an appropriate temperature for charging and discharging.

  When the instruction receiving unit 141 receives an input of an operation start instruction, the temperature acquisition unit 142 acquires the temperature of the secondary battery 120 from the temperature sensor 150 (step S202). Next, the charge / discharge control unit 144 determines whether or not the temperature of the secondary battery 120 acquired by the temperature acquisition unit 142 is less than a first temperature threshold (for example, 0 degrees Celsius) (step S203).

  When the charge / discharge control unit 144 determines that the temperature of the secondary battery 120 is equal to or higher than the first temperature threshold (step S203: NO), the start-up operation is terminated. This is because if the temperature of the secondary battery is equal to or higher than the first temperature threshold, there is no problem even if the secondary battery 120 is charged and discharged. On the other hand, when the charge / discharge control unit 144 determines that the temperature of the secondary battery 120 is lower than the first temperature threshold (step S203: YES), the temperature is a second temperature threshold (for example, −20 degrees Celsius). ) Is determined (step S204). When the charge / discharge control unit 144 determines that the temperature of the secondary battery 120 is lower than the second temperature threshold (step S204: YES), the charge / discharge control unit 144 returns to step S203, and the temperature of the secondary battery 120 is activated by the operation of the air conditioning equipment 110. Wait until becomes equal to or higher than the second temperature threshold. Thereby, it is possible to prevent the secondary battery 120 from being damaged by forcibly charging and discharging the secondary battery 120.

  On the other hand, when it determines with the temperature of the secondary battery 120 being more than a 2nd temperature threshold value (step S204: NO), the charging / discharging control part 144 performs the warming-up operation of a secondary battery (step S205).

FIG. 3 is a flowchart showing the warm-up operation of the secondary battery system 100 according to at least one embodiment.
Here, a specific execution method of the warm-up operation will be described.
First, the charging rate estimation unit 143 estimates the charging rate of the secondary battery 120 (step S301). Here, the charging rate estimation unit 143 may estimate the charging rate of the secondary battery 120 based on the open circuit voltage estimated from the voltage of the secondary battery 120, for example, or the current charged and discharged by the secondary battery 120 The charging rate of the secondary battery 120 may be estimated based on the integrated value of the current values.

  Next, the charge / discharge control unit 144 outputs a discharge instruction to the converter 130 to cause the secondary battery 120 to discharge at a preparatory discharge rate (for example, 1C) (step S302). As the preparation discharge rate, a rate lower than a predetermined normal operation discharge rate is selected. The reason for this is to suppress the progress of deterioration of the secondary battery 120 in a state where the temperature of the secondary battery 120 is lower than the third threshold value. The reason for discharging prior to the charging of the secondary battery 120 is that lithium metal may be deposited on the negative electrode when the secondary battery 120 is charged in a low-temperature environment. This is because the influence on the deterioration of the battery 120 is small. When the secondary battery system 100 is not used for a long time, in order to prevent the secondary battery 120 from deteriorating, it is common to adjust the charging rate of the secondary battery 120 to about 30 percent before the secondary battery system 100 stops. Is. Therefore, when the secondary battery system 100 is normally stopped for maintenance or the like, the charging rate of the secondary battery 120 does not become less than the lower limit of the allowable charging rate due to the discharge in step S302.

  Next, the charging rate estimation unit 143 estimates the charging rate of the secondary battery 120 again (step S303). Then, the charging / discharging control unit 144 determines whether or not the current charging rate of the secondary battery 120 is lower than the charging rate of the secondary battery 120 before the start of discharging by a first predetermined value or more (step). S304). In the present embodiment, 10% is adopted as the first predetermined value of the discharge target. That is, the charging / discharging control unit 144 determines whether or not the charging rate estimated in step S301 has decreased by 10 percent or more than the charging rate estimated in step S303. If the charge / discharge control unit 144 determines that the current charge rate of the secondary battery 120 has not decreased by more than 10 percent from the charge rate of the secondary battery 120 before the start of discharge (step S304: NO), the process proceeds to step S302. Returning, the secondary battery 120 continues to be discharged. That is, the charge / discharge control unit 144 causes the secondary battery 120 to discharge the amount of electricity corresponding to the first predetermined value of the discharge target (second amount of electricity).

  On the other hand, when charging / discharging control unit 144 determines that the current charging rate of secondary battery 120 is 10% or more lower than the charging rate of secondary battery 120 before the start of discharging (step S304: YES), converter 130 A charge instruction is output, and the secondary battery 120 is charged at a preparatory charge rate (for example, 0.5 C) (step S305). A charge rate for preparation is selected to be lower than a predetermined charge rate for normal operation. The reason for this is to suppress the progress of the deterioration of the secondary battery 120 in a low-temperature environment. When the secondary battery 120 is charged, lithium metal may be deposited on the negative electrode. A low rate is preferred. Next, the charging rate estimation unit 143 estimates the charging rate of the secondary battery 120 again (step S306). Then, the charging / discharging control unit 144 determines whether or not the current charging rate of the secondary battery 120 is higher than the charging rate of the secondary battery 120 before the start of charging by a second predetermined value or more of the charging target (step S307). ). In the present embodiment, 10% is adopted as the second predetermined value of the discharge target. That is, the charging / discharging control unit 144 determines whether or not the charging rate estimated last in step S303 is 10 percent or more higher than the charging rate estimated in step S306. If the charge / discharge control unit 144 determines that the current charge rate of the secondary battery 120 is not higher by 10 percent or more than the charge rate of the secondary battery 120 before the start of charging (step S307: NO), the process proceeds to step S305. Returning and charging of the secondary battery 120 is continued. That is, the charging / discharging control unit 144 causes the secondary battery 120 to charge the amount of electricity corresponding to the second predetermined value of the charging target (first amount of electricity).

  On the other hand, when the charge / discharge control unit 144 determines that the current charging rate of the secondary battery 120 is 10% or more higher than the charging rate of the secondary battery 120 before the start of charging (step S307: YES), the charging / discharging control unit 144 temporarily warms up. The machine operation is terminated and compared with the warm-up target of the temperature of the secondary battery 120. (Returns to acquiring the temperature of the secondary battery 120 in FIG. 2 (step S206).) In this way, the charge / discharge control unit 144 performs the preparation charge rate and preparation lower than the normal operation charge rate and the normal operation discharge rate. By charging / discharging the secondary battery 120 at the discharge rate for use, the temperature of the secondary battery 120 can be raised by the heat generation of the secondary battery 120 due to charge / discharge while preventing the secondary battery 120 from deteriorating. . Accordingly, the charge / discharge control unit 144 can increase the temperature of the secondary battery 120 without substantially changing the charging rate of the secondary battery 120.

  Returning to FIG. 2, when the charge / discharge control unit 144 executes the warm-up operation in step S205, the temperature acquisition unit 142 acquires the temperature of the secondary battery 120 (step S206). Next, the charge / discharge control unit 144 determines whether or not the temperature acquired by the temperature acquisition unit 142 is equal to or higher than a third temperature threshold (for example, 15 degrees Celsius) (step S207).

  When the charge / discharge control unit 144 determines that the temperature acquired by the temperature acquisition unit 142 is lower than the third temperature threshold (step S207: NO), the charge / discharge control unit 144 returns to step S205 and performs the warm-up operation again. That is, the charge / discharge control unit 144 repeatedly executes the warm-up operation until the temperature of the secondary battery 120 becomes equal to or higher than the third temperature threshold. On the other hand, when it is determined that the temperature acquired by the temperature acquisition unit 142 is equal to or higher than the third temperature threshold (step S207: YES), the charge / discharge control unit 144 ends the activation operation of the secondary battery 120.

  Thereafter, the instruction receiving unit 141 receives an input of a charge / discharge instruction for the secondary battery 120 from the outside, and the charge / discharge control unit 144 is charged at the normal operation charge rate or at the normal operation discharge rate according to the instruction. Is discharged to the secondary battery 120.

  Thus, according to the present embodiment, the secondary battery control device 140 charges and discharges the secondary battery 120 at a preparation charge rate and a preparation discharge rate lower than the normal operation charge rate and the normal operation discharge rate. . Thereby, the progress of deterioration of the secondary battery 120 can be suppressed. In addition, according to the present embodiment, the secondary battery control device 140 increases the temperature of the secondary battery 120 without changing the charging rate of the secondary battery 120, so that the capacity of the secondary battery 120 before the start of operation is increased. Regardless, the temperature can be set to an appropriate temperature at the start of operation of the secondary battery 120.

<< Second Embodiment >>
When the secondary battery 120 is not charged / discharged for maintenance or the like, it is generally possible to prevent deterioration by storing it at a charging rate of about 30%. In addition, when the secondary battery 120 is suddenly stopped, the secondary battery 120 when it is inserted into the power system 190 does not necessarily have an appropriate charging rate.
On the other hand, when the secondary battery 120 is used for smoothing of natural energy power generation, the charging rate of the secondary battery 120 is maintained at a charging rate of about 50%, thereby charging and discharging a large current due to a sudden change in generated power. Can respond. In view of this, the secondary battery system 400 according to the second embodiment allows the temperature of the secondary battery 120 to be an appropriate temperature for charging / discharging and the charge rate of the secondary battery 120 to be close to a predetermined target value. The charging / discharging of the secondary battery 120 is controlled.

FIG. 4 is a schematic block diagram illustrating a configuration of a secondary battery system 400 according to at least one embodiment. In FIG. 4, a solid line indicates a power line, and a broken line indicates a data line.
The secondary battery control device 440 according to the second embodiment further includes an electric quantity determination unit 445 in addition to the configuration of the first embodiment. Further, the secondary battery control device 440 according to the second embodiment is different from the first embodiment in the warm-up operation by the charge / discharge control unit 444. Of the configurations of the second embodiment, those having the same configuration as the first embodiment will be described using the same reference numerals as those of the first embodiment.

Based on the charging rate of the secondary battery 120 estimated by the charging rate estimation unit 143, the electric amount determination unit 445 determines the amount of electricity to be charged / discharged in the secondary battery 120 in the warm-up operation.
The charge / discharge control unit 444 performs a warm-up operation of the secondary battery 120 based on the amount of electricity determined by the amount of electricity determination unit 445.

FIG. 5 is a flowchart showing the warm-up operation of the secondary battery system 400 according to at least one embodiment. Of the procedures according to the second embodiment, the same steps as those of the first embodiment will be described using the same reference numerals as those of the first embodiment. That is, the step of the warm-up operation S205 in FIG. 2 which is the flowchart of the first embodiment is performed in each step shown in FIG.
Here, a specific execution method of the warm-up operation according to the second embodiment will be described.
First, the charging rate estimation unit 143 estimates the charging rate of the secondary battery 120 (step S301). Next, the electric quantity determination unit 445 determines whether the charging rate estimated by the charging rate estimation unit 143 is low, high, or equal to a predetermined charging rate target value (for example, 55 percent). (Step S501).

  When it is determined that the charging rate estimated by the charging rate estimation unit 143 is lower than the target value (step S501: low), the electric amount determination unit 445 determines the charging electric amount (first electric amount) in the warm-up operation as the charging rate. As a charging target, the amount of electricity of the third predetermined value is determined, and the amount of electricity discharged in the warm-up operation (second amount of electricity) is set as a charging rate that is smaller than the third predetermined value of the charging target. The amount of electricity corresponding to the fourth predetermined value is determined (step S502). In the present embodiment, 20% is adopted as the third predetermined value of the charging target. Further, 10% is adopted as the fourth predetermined value of the discharge target. That is, as a prescription for bringing the charging rate closer to a predetermined target value when the charging rate is lower than a predetermined target value, the electric quantity determining unit 445 is more in warm-up operation than the discharge electric quantity in warm-up operation. Determine the amount of charge electricity to a large value.

  In addition, when it is determined that the charging rate estimated by the charging rate estimation unit 143 is higher than the target value (step S501: high), the electric amount determination unit 445 uses the charging electric amount in the warm-up operation as the charging rate. The amount of electricity corresponding to the fifth predetermined value is determined, and the amount of electricity discharged in the warm-up operation is set to a value larger than the fifth predetermined value of the charging target as the charging rate. (Step S503). In this embodiment, 10% is adopted as the fifth predetermined value of the charging target. Further, 20% is adopted as the sixth predetermined value of the discharge target. That is, as a prescription for bringing the charging rate closer to a predetermined target value when the charging rate is higher than a predetermined target value, the electric quantity determination unit 445 is more in warm-up operation than the discharge electric quantity in warm-up operation. Decrease the amount of charge electricity.

  In addition, when determining that the charging rate estimated by the charging rate estimation unit 143 is equal to the target value (step S501: equal), the electric amount determination unit 445 determines the charging electric amount and the discharging electric amount in the warm-up operation as the charging rate. The amount of electricity for 10 percent is determined (step S504).

  When the electric quantity determination unit 445 determines the charge electric quantity and the discharge electric quantity in any of steps S502 to S504, the charge / discharge control unit 444 outputs a discharge instruction to the converter 130, and discharges at the preparatory discharge rate. The secondary battery 120 is made to perform (step S302). Next, the charging rate estimation unit 143 determines whether or not the discharge electricity amount of the secondary battery 120 has reached the discharge electricity amount determined by the electricity amount determination unit 445 (step S505).

  Whether or not the discharge electricity amount of the secondary battery 120 has reached the discharge electricity amount determined by the electricity amount determination unit 445 is determined by, for example, the discharge electricity amount determined by the charge amount / discharge control unit 444 by the electricity amount determination unit 445. The discharge time can be calculated based on the discharge rate, and the determination can be made based on whether or not the discharge time has elapsed. Further, for example, the charge / discharge control unit 444 also calculates the integrated value of the discharge current of the secondary battery 120 and determines by comparing the integrated value with the discharge electric quantity determined by the electric quantity determining unit 445. Can do. Further, for example, the charge / discharge control unit 444 calculates a charge rate after the completion of discharge based on the discharge electricity amount determined by the electricity amount determination unit 445, and calculates the charge rate of the secondary battery 120 and the calculated charge rate. It can also be determined by comparison.

  When the charging rate estimation unit 143 determines that the amount of discharged electricity of the secondary battery 120 has not reached the amount of discharged electricity determined by the amount of electricity determining unit 445 (step S505: NO), the process returns to step S302, and the secondary The battery 120 continues to be discharged. On the other hand, when charging rate estimation unit 143 determines that the amount of discharged electricity of secondary battery 120 has reached the amount of discharged electricity determined by amount of electricity determining unit 445 (step S505: YES), it instructs converter 130 to charge. The secondary battery 120 is output and charged at the preparatory charge rate (step S305). Next, the charging rate estimation unit 143 determines whether or not the amount of electricity charged in the secondary battery 120 has reached the amount of electricity charged determined by the amount-of-electricity determining unit 445 (step S506). If the charge rate estimation unit 143 determines that the amount of charge of the secondary battery 120 has not reached the amount of charge determined by the amount of electricity determination unit 445 (step S506: NO), the charge rate estimation unit 143 returns to step S305 to return to the secondary The battery 120 is continuously charged.

On the other hand, when it is determined that the charged electricity amount of the secondary battery 120 has reached the charged electricity amount determined by the electricity amount determining unit 445 (step S506: YES), the charging rate estimating unit 143 ends the warm-up operation. .
Returning to FIG. 2, the charge / discharge control unit 444 performs the warm-up operation in step S <b> 205 until the temperature of the secondary battery 120 acquired by the temperature acquisition unit 142 (step S <b> 206) becomes equal to or higher than the third temperature threshold. Repeat the warm-up operation.

  FIG. 6 is a graph showing an example of the transition of the charging rate of the secondary battery 120. FIG. 6A is a diagram illustrating an example of a rate and an amount of electricity related to charging / discharging of the secondary battery 120. FIG. 6B is a diagram illustrating an example of the transition of the charging rate of the secondary battery 120.

  According to the present embodiment, when the charging rate of the secondary battery 120 is less than the target value, the charging / discharging control unit 444 discharges an amount of electricity corresponding to a charging rate of 10 percent, as shown in FIG. The secondary battery 120 is charged with an amount of electricity corresponding to a charging rate of 20 percent. As a result, the secondary battery system 400 determines the charge rate of the secondary battery 120 as a difference between the charge electricity amount (for 20 percent charge rate) and the discharge electricity amount (for 10 percent charge rate) by one warm-up operation. By improving by 10%, as shown in FIG. 6B, the charging rate of the secondary battery 120 can be brought close to the target value. In FIG. 6, the warm-up operation is performed twice, and the charging rate is 50% of the target. Here, when the warm-up operation is repeatedly performed until the temperature of the secondary battery 120 becomes equal to or higher than the third temperature threshold value, the charge rate in the warm-up operation can be increased by using the amount of charge in warm-up operation. It is preferable to correct a certain charging rate of 20 percent and a discharging rate of 10 percent. That is, if the temperature of the secondary battery 120 becomes higher than the first temperature threshold value due to the warm-up operation, and the difference from the third temperature threshold value is reduced, a smaller electric capacity width (for example, charge amount and discharge amount). It becomes easy to approach the target value by resetting the difference in the amount of electricity to the charge rate of 5%.

  Similarly, according to the present embodiment, when the charge rate of the secondary battery 120 is higher than the target value, the charge / discharge control unit 444 discharges the amount of electricity for the charge rate of 20% and the electricity for the charge rate of 10%. The secondary battery 120 performs charging of the amount. Thereby, the secondary battery system 400 can bring the charging rate of the secondary battery 120 close to the target value by reducing the charging rate of the secondary battery 120 by 10% by one warm-up operation.

<< Third Embodiment >>
FIG. 7 is a schematic block diagram showing a configuration of a secondary battery system 700 according to at least one embodiment. In FIG. 7, a solid line indicates a power line, and a broken line indicates a data line.
The secondary battery system 700 according to the third embodiment controls charging / discharging of the secondary battery 120 by finely changing the preparation charging rate and the preparation discharging rate according to the temperature of the secondary battery 120. The secondary battery control device 740 according to the third embodiment further includes a rate determining unit 746 in addition to the configuration of the second embodiment. Further, the secondary battery control device 740 according to the third embodiment is different from the second embodiment in the warm-up operation by the charge / discharge control unit 744. In addition, about the structure of 3rd Embodiment, what is the same structure as 2nd Embodiment is demonstrated using the same code | symbol as 2nd Embodiment.

The rate determination unit 746 determines the preparation charge rate and the preparation discharge rate based on the temperature of the secondary battery 120 estimated by the temperature acquisition unit 142.
The charge / discharge control unit 744 performs the warm-up operation of the secondary battery 120 based on the preparation charge rate and the preparation discharge rate determined by the rate determination unit 746.

FIG. 8 is a flowchart showing a warm-up operation of the secondary battery system 700 according to at least one embodiment. Of the procedures according to the third embodiment, the same steps as those of the second embodiment will be described using the same reference numerals as those of the second embodiment.
Here, a specific execution method of the warm-up operation according to the third embodiment will be described.
First, the charging rate estimation unit 143 estimates the charging rate of the secondary battery 120 (step S301). Next, the electrical quantity determination unit 445 determines whether the charging rate estimated by the charging rate estimation unit 143 is low, high, or equal to the target value (step S501).

  When determining that the charging rate estimated by the charging rate estimation unit 143 is lower than the target value (step S501: low), the electric amount determination unit 445 uses the charging electric amount in the warm-up operation as the charging rate and sets the third charging target. And the amount of electricity discharged during the warm-up operation is determined to be the amount of electricity corresponding to the fourth predetermined value of the discharge target that is smaller than the third predetermined value of the charging target as the charging rate. (Step S502). In the present embodiment, 20 percent is adopted as the third predetermined value of the charging target, and 10 percent is adopted as the fourth predetermined value of the discharging target.

  In addition, when it is determined that the charging rate estimated by the charging rate estimation unit 143 is higher than the target value (step S501: high), the electric amount determination unit 445 uses the charging electric amount in the warm-up operation as the charging rate. The amount of electricity corresponding to the fifth predetermined value is determined, and the amount of electricity discharged in the warm-up operation is the amount of electricity corresponding to the sixth predetermined value of the discharge target that is higher than the fifth predetermined value of the charging target as the charging rate. (Step S503). In the present embodiment, 10 percent is adopted as the fifth predetermined value of the charging target, and 20 percent is adopted as the sixth predetermined value of the discharging target.

  In addition, when determining that the charging rate estimated by the charging rate estimation unit 143 is equal to the target value (step S501: equal), the electric amount determination unit 445 determines the charging electric amount and the discharging electric amount in the warm-up operation as the charging rate. The amount of electricity for 10 percent is determined (step S504).

  When the electric quantity determination unit 445 determines the charge electric quantity and the discharge electric quantity in any of steps S502 to S504, the temperature acquisition unit 142 acquires the temperature of the secondary battery 120 (step S701). Next, the rate determining unit 746 determines the preparation charge rate and preparation discharge rate of the secondary battery 120 based on the temperature acquired by the temperature acquisition unit 142 (step S702).

  In the present embodiment, when the temperature of the secondary battery 120 is not less than −20 degrees Celsius and less than −10 degrees Celsius, the rate determination unit 746 sets the preparation charge rate to 0.2 C and sets the preparation discharge rate to 1 C. To do. In the present embodiment, the rate determination unit 746 sets the preparation charge rate to 0.5 C and sets the preparation discharge rate to 1 C when the temperature of the secondary battery 120 is −10 degrees Celsius or more and less than 0 degrees Celsius. And In the present embodiment, the rate determining unit 746 sets the preparation charge rate to 1C and the preparation discharge rate to 1C when the temperature of the secondary battery 120 is 0 degree Celsius or more and less than 15 degrees Celsius. The preparation charging rate and the preparation discharging rate determined by the rate determining unit 746 are a charging rate and a discharging rate suitable for charging / discharging the secondary battery 120 at the corresponding temperature.

  Next, charge / discharge control unit 744 outputs a discharge instruction to converter 130 to cause secondary battery 120 to perform discharge at the discharge rate determined by rate determination unit 746 (step S703). Next, the charging rate estimation unit 143 determines whether or not the discharge electricity amount of the secondary battery 120 has reached the discharge electricity amount determined by the electricity amount determination unit 445 (step S505).

  When the charging rate estimation unit 143 determines that the amount of discharged electricity of the secondary battery 120 has not reached the amount of discharged electricity determined by the amount of electricity determining unit 445 (step S505: NO), the process returns to step S703, and the secondary The battery 120 continues to be discharged. On the other hand, when charging rate estimation unit 143 determines that the amount of discharged electricity of secondary battery 120 has reached the amount of discharged electricity determined by amount of electricity determining unit 445 (step S505: YES), it instructs converter 130 to charge. The secondary battery 120 is output and charged at the charging rate determined by the rate determining unit 746 (step S704).

Next, the charging rate estimation unit 143 determines whether or not the amount of electricity charged in the secondary battery 120 has reached the amount of electricity charged determined by the amount-of-electricity determining unit 445 (step S506). If the charge rate estimation unit 143 determines that the amount of charge of the secondary battery 120 has not reached the amount of charge determined by the amount of electricity determination unit 445 (step S506: NO), the charge rate estimation unit 143 returns to step S704 to return to the secondary The battery 120 is continuously charged.
On the other hand, when it is determined that the charge electricity amount of the secondary battery 120 has reached the charge electricity amount determined by the electricity amount determination unit 445 (step S506: YES), the charge / discharge control unit 744 ends the warm-up operation. .

FIG. 9 is a diagram illustrating an example of a change in temperature of the secondary battery 120.
Here, charge / discharge control of the secondary battery 120 by the secondary battery control device 740 will be described using a specific example.
First, as illustrated in FIG. 9, when the secondary battery 120 is inserted into the power system 190 in a state where the temperature of the secondary battery 120 is −25 degrees Celsius, the secondary battery control device 740 starts control of the secondary battery 120. At this time, since the temperature of the secondary battery 120 is less than −20 degrees Celsius until time t <b> 1 shown in FIG. 9, the secondary battery control device 740 does not charge / discharge the secondary battery 120.

When the ambient temperature of the secondary battery 120 rises due to the operation of the air conditioning equipment, and the temperature of the secondary battery 120 becomes −20 degrees Celsius at time t1, the secondary battery control device 740 causes the discharge of 1C and the temperature of 0.2C. Repeated warm-up operation by charging. Thereby, the rate of temperature increase of the secondary battery 120 becomes higher than that until time t1. Subsequently, when the temperature of the secondary battery 120 reaches −10 degrees Celsius at time t2, the secondary battery control device 740 repeatedly performs a warm-up operation by discharging 1C and charging 0.5C. Thereby, the rate of temperature increase of secondary battery 120 is further increased as compared to time t2. Subsequently, when the temperature of the secondary battery 120 reaches 0 degrees Celsius at time t3, the secondary battery control device 740 repeatedly executes the warm-up operation by discharging 1C and charging 1C. Thereby, the rate of temperature increase of secondary battery 120 is further increased as compared to time t3.
Thereafter, when the temperature of the secondary battery 120 becomes 15 degrees Celsius at time t4, the secondary battery control device 740 ends the warm-up operation.

  As described above, according to the present embodiment, the charge / discharge control unit 744 performs the warm-up operation of the secondary battery 120 at an appropriate charge rate and discharge rate according to the temperature of the secondary battery 120. Heat generation by the secondary battery 120 can be promoted while preventing deterioration that is likely to occur in the low temperature region of the battery 120. As a result, as in the second embodiment, the battery system 700 also determines the charging rate of the secondary battery 120 by one warm-up operation, and the difference between the charge electricity amount and the discharge electricity amount in the warm-up operation. By improving this amount, the charging rate of the secondary battery 120 can be brought close to the target value.

<< Fourth Embodiment >>
FIG. 10 is a schematic block diagram showing a configuration of a secondary battery system 1000 according to at least one embodiment. In FIG. 10, a solid line indicates a power line, and a broken line indicates a data line.
The secondary battery system 1000 according to the fourth embodiment sets the temperature of the secondary battery 120 to an appropriate temperature before starting the operation of the secondary battery 120 even when a failure occurs in the air conditioning equipment. It is.

  The secondary battery control device 1040 according to the fourth embodiment further includes an air conditioning determination unit 1047 in addition to the configuration of the third embodiment. Further, the secondary battery control device 1040 according to the fourth embodiment differs from the third embodiment in the operation of the charge / discharge control unit 1044. In addition, about the structure of 4th Embodiment, what is the same structure as 3rd Embodiment is demonstrated using the same code | symbol as 3rd Embodiment.

  The air conditioning determination unit 1047 receives a signal from the air conditioning facility and determines whether or not a failure has occurred in the air conditioning facility. For example, when the air conditioning facility outputs a failure signal to the secondary battery control device 1040 when a failure occurs, the air conditioning determination unit 1047 determines that a failure has occurred in the air conditioning facility by receiving the failure signal. Can do. For example, when the air conditioning equipment constantly outputs a control signal to the secondary battery control device 1040, the air conditioning determination unit 1047 determines that a failure has occurred in the air conditioning equipment when the control signal cannot be received. can do.

  The charge / discharge control unit 1044 controls the charge / discharge of the secondary battery 120 based on the determination result of the air conditioning determination unit 1047. Specifically, when the air conditioning determination unit 1047 determines that a failure has not occurred in the air conditioning equipment, the charge / discharge control unit 1044 executes the start-up operation shown in FIG. 2 as in the first embodiment. On the other hand, when the air conditioning determination unit 1047 determines that a failure has occurred in the air conditioning equipment, the charge / discharge control unit 1044 performs the following startup operation.

FIG. 11 is a flowchart showing a start-up operation of the secondary battery system 1000 according to at least one embodiment. Note that, in the procedure according to the fourth embodiment, the same steps as those in the first embodiment will be described using the same reference numerals as those in the first embodiment.
When the air-conditioning determination unit 1047 determines that a failure has occurred in the air-conditioning equipment, when the administrator inputs an operation start instruction to the secondary battery control device 1040, the instruction reception unit 141 of the secondary battery control device 1040 The input of the instruction is accepted (step S201).

  When the instruction receiving unit 141 receives an input of an operation start instruction, the temperature acquisition unit 142 acquires the temperature of the secondary battery 120 from the temperature sensor 150 (step S202). Next, the charge / discharge control unit 1044 determines whether or not the temperature of the secondary battery 120 acquired by the temperature acquisition unit 142 is less than the first temperature threshold (step S203).

  When it is determined that the temperature of the secondary battery 120 is equal to or higher than the first temperature threshold (step S203: NO), the charge / discharge control unit 1044 ends the startup operation. On the other hand, when the charge / discharge control unit 1044 determines that the temperature of the secondary battery 120 is lower than the first temperature threshold (step S203: YES), it determines whether or not the temperature is lower than the second temperature threshold. Determination is made (step S204). When the charge / discharge control unit 1044 determines that the temperature of the secondary battery 120 is lower than the second temperature threshold (step S204: YES), the charge / discharge control unit 1044 returns to step S202, and the temperature of the secondary battery 120 is the second temperature threshold. Wait until it is over.

  On the other hand, when it determines with the temperature of the secondary battery 120 being more than a 2nd temperature threshold value (step S204: NO), the charging / discharging control part 1044 performs warming-up operation (step S205). Next, the temperature acquisition unit 142 acquires the temperature of the secondary battery 120 (step S206). Next, the charge / discharge control unit 1044 determines whether or not the temperature acquired by the temperature acquisition unit 142 is equal to or higher than a fourth temperature threshold (step S1101). The fourth temperature threshold is a temperature that is sufficiently suitable for charging and discharging the secondary battery 120. In the present embodiment, 20 degrees Celsius is adopted as the fourth temperature threshold.

  When it is determined that the temperature acquired by the temperature acquisition unit 142 is not equal to or higher than the fourth temperature threshold (step S1101: NO), the charge / discharge control unit 1044 returns to step S205 and performs the warm-up operation again. That is, the charge / discharge control unit 1044 repeatedly executes the warm-up operation until the temperature of the secondary battery 120 becomes equal to or higher than the fourth temperature threshold. On the other hand, when the charge / discharge control unit 1044 determines that the temperature acquired by the temperature acquisition unit 142 is equal to or higher than the fourth temperature threshold (step S1101: YES), the instruction receiving unit 141 instructs charging / discharging from the outside. Is determined (step S1102).

  When the charge / discharge control unit 1044 determines that the instruction receiving unit 141 has not received a charge / discharge instruction from the outside (step S1102: NO), the temperature acquisition unit 142 acquires the temperature of the secondary battery 120 (step S1102). S1103). Next, the charge / discharge control unit 1044 determines whether or not the temperature acquired by the temperature acquisition unit 142 is equal to or higher than a third temperature threshold (step S1104).

When the charge / discharge control unit 1044 determines that the temperature acquired by the temperature acquisition unit 142 is equal to or higher than the third temperature threshold (step S1104: YES), the charge / discharge control unit 1044 returns to step S1102, and determines whether or not a charge / discharge instruction is accepted. To do.
On the other hand, when the charge / discharge control unit 1044 determines that the temperature acquired by the temperature acquisition unit 142 has become less than the third temperature threshold (step S1104: NO), the charge / discharge control unit 1044 returns to step S205, and the temperature of the secondary battery 120 is Celsius. Repeat the warm-up operation until it reaches 20 degrees or more.

In step S1102, when the charge / discharge control unit 1044 determines that the instruction receiving unit 141 has received a charge / discharge instruction from the outside (step S1102: YES), the start-up operation of the secondary battery 120 ends.
Thereafter, the charge / discharge control unit 1044 causes the secondary battery 120 to perform charging at the charge rate during normal operation or discharge at the normal operation according to the instruction received in step S1102.

  Thus, according to this embodiment, the secondary battery control device 1040 changes the temperature of the secondary battery 120 to charge / discharge of the secondary battery 120 by warm-up operation when a failure occurs in the air conditioner. The temperature is set to be higher than a third temperature threshold that is a suitable minimum value of the temperature, and when the temperature of the secondary battery 120 becomes lower than the third temperature threshold, the warm-up operation is performed again. Thereby, the secondary battery control apparatus 1040 can maintain the temperature of the secondary battery 120 at a temperature suitable for charging / discharging of the secondary battery 120 even when a failure occurs in the air conditioner.

As described above, the embodiment has been described in detail with reference to the drawings. However, the specific configuration is not limited to that described above, and various design changes and the like can be made.
For example, in the above-described embodiment, the case where charging is performed after discharging in the warm-up operation has been described, but the present invention is not limited thereto. For example, when there is a possibility that the secondary battery 120 may be deteriorated by discharging the amount of electricity corresponding to the charge rate of 10% from the secondary battery 120, such as when the charge rate of the secondary battery 120 is 10% or less, the battery is charged. The discharge may be performed after performing the above.

  Moreover, although embodiment mentioned above demonstrated the case where both the charge rate for preparation and the discharge rate for preparation were lower than the charge rate for normal operation and the discharge rate for normal operation, it is not restricted to this. For example, in another embodiment, the preparation charge rate may be lower than the normal operation charge rate, and the preparation discharge rate may be the same as the normal operation discharge rate. Further, for example, in another embodiment, the preparation discharge rate may be lower than the normal operation discharge rate, and the preparation charge rate may be the same as the normal operation charge rate.

FIG. 12 is a schematic block diagram illustrating a configuration of a computer 1200 according to at least one embodiment.
The computer 1200 includes a CPU 1210, a main storage device 1220, an auxiliary storage device 1230, and an interface 1240.
The secondary battery control device (for example, the secondary battery control devices 140, 440, 740, 1040) according to at least one embodiment described above is mounted on the computer 1200. The operation of each processing unit described above is stored in the auxiliary storage device 1230 in the form of a program. The CPU 1210 reads the program from the auxiliary storage device 1230, develops it in the main storage device 1220, and executes the above processing according to the program.

  In at least one embodiment, the auxiliary storage device 1230 is an example of a tangible medium that is not temporary. Other examples of the tangible medium that is not temporary include a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, and a semiconductor memory connected via the interface 1240. When this program is distributed to the computer 1200 via a communication line, the computer 1200 that has received the distribution may develop the program in the main storage device 1220 and execute the above processing.

  The program may be for realizing a part of the functions described above. Further, the program may be a so-called difference file (difference program) that realizes the above-described function in combination with another program already stored in the auxiliary storage device 1230.

  In the present specification, ordinal numbers such as “first” and “second” are used to distinguish the constituent elements from each other, and do not imply order or importance.

  DESCRIPTION OF SYMBOLS 100 ... Secondary battery system 110 ... Air conditioning equipment 120 ... Secondary battery 130 ... Converter 140 ... Secondary battery control apparatus 141 ... Instruction reception part 142 ... Temperature acquisition part 143 ... Charge rate estimation part 144 ... Charging / discharging control part 190 ... Electric power System 400 ... Secondary battery system 440 ... Secondary battery control device 444 ... Charge / discharge control unit 445 ... Electric quantity determination unit 700 ... Secondary battery system 740 ... Secondary battery control device 744 ... Charge / discharge control unit 746 ... Rate determination unit DESCRIPTION OF SYMBOLS 1000 ... Secondary battery system 1040 ... Secondary battery control apparatus 1044 ... Charge-discharge control part 1047 ... Air-conditioning determination part 1200 ... Computer 1210 ... CPU 1220 ... Main memory 1230 ... Auxiliary memory 1240 ... Interface

Claims (10)

An instruction receiving unit for receiving an instruction to start operation of the secondary battery;
A temperature acquisition unit for acquiring the temperature of the secondary battery;
A charge / discharge control unit for controlling charge / discharge of the secondary battery,
When the temperature acquired by the temperature acquisition unit when the instruction reception unit receives an operation start instruction is less than a predetermined first temperature threshold value, the charge / discharge control unit is connected to the secondary battery. , Repeatedly executing a warm-up operation for charging a predetermined first electric quantity at a predetermined preparatory charge rate and discharging a predetermined second electric quantity at a predetermined preparatory discharge rate;
At least one of the preparation charge rate or the preparation discharge rate is lower than a predetermined normal operation charge rate or a predetermined normal operation discharge rate. When the temperature acquired by the temperature acquisition unit is less than the first temperature threshold when the instruction reception unit receives an operation start instruction, the charge / discharge control unit is configured to perform the preparation discharge rate at the preparation discharge rate. 2. The secondary battery is caused to charge the first electric quantity at the preparatory charging rate after causing the secondary battery to discharge a second quantity of electricity. 3. Secondary battery control device. The charge / discharge control unit is configured such that the temperature acquired by the temperature acquisition unit when the instruction reception unit receives an operation start instruction is lower than a predetermined second temperature threshold lower than a first temperature threshold. The secondary battery control device according to claim 1, wherein the secondary battery is not charged and discharged. The charge / discharge control unit determines in advance that a temperature at which the temperature acquisition unit acquires charge of the secondary battery at the preparation charge rate and discharge at the preparation discharge rate is higher than the first temperature threshold. The secondary battery control device according to any one of claims 1 to 3, wherein the secondary battery is caused to perform until the temperature reaches a third temperature threshold value or higher. An air conditioning determination unit that determines whether there is a failure in the air conditioning equipment that controls the ambient temperature of the secondary battery provided in a closed space or building,
When the air conditioning determination unit determines that the air conditioning facility has a failure, the charge / discharge control unit acquires the charge at the preparation charge rate and the discharge at the preparation discharge rate by the temperature acquisition unit. After allowing the secondary battery to perform until the temperature reaches a predetermined fourth temperature threshold higher than the third temperature threshold, the operation waits until the instruction receiving unit receives a charge / discharge command for normal operation When the temperature acquired by the temperature acquisition unit during the operation standby is less than a third temperature threshold, the secondary battery is charged at the preparation charge rate and discharged at the preparation discharge rate. The secondary battery control device according to claim 4, wherein: When the charging rate of the secondary battery is lower than a predetermined target value, the charge / discharge control unit increases the first electric quantity from the second electric quantity to increase the charging rate. When the secondary battery is charged / discharged and the charging rate of the secondary battery is higher than a predetermined target value, the charging rate is decreased by increasing the second electric quantity above the first electric quantity. The secondary battery control apparatus according to any one of claims 1 to 5, wherein the secondary battery is charged and discharged. A rate determining unit that determines the preparation charging rate and the preparation discharging rate based on the temperature acquired by the temperature acquisition unit;
The charge / discharge control unit performs warm-up operation of the secondary battery when the temperature acquired by the temperature acquisition unit is less than a first temperature threshold when the instruction reception unit receives an operation start instruction. On the other hand, charging at the preparation charging rate determined by the rate determination unit and discharging at the preparation discharge rate determined by the rate determination unit are repeatedly performed. The secondary battery control device according to any one of the above.   A secondary battery system comprising: a secondary battery; and the secondary battery control device according to any one of claims 1 to 7. Receiving an instruction to start operation of the secondary battery system;
Acquiring the temperature of the secondary battery when receiving the operation start instruction;
When the acquired temperature is lower than a predetermined first temperature threshold, the secondary battery is charged with a predetermined first electric quantity at a predetermined preparatory charging rate and predetermined preparation. Repeatedly performing a warm-up operation for discharging a predetermined second amount of electricity at a discharge rate for use,
At least one of the preparatory charge rate or the preparatory discharge rate is lower than a predetermined normal operation charge rate or a predetermined normal operation discharge rate. An instruction receiving unit for receiving an instruction to start operation of the secondary battery;
A temperature acquisition unit for acquiring a temperature of the secondary battery;
Operating a computer as a charge / discharge control unit for controlling charge / discharge of the secondary battery;
When the temperature acquired by the temperature acquisition unit when the instruction reception unit receives an operation start instruction is less than a predetermined first temperature threshold value, the charge / discharge control unit is connected to the secondary battery. , Repeatedly executing a warm-up operation for charging a predetermined first electric quantity at a predetermined preparatory charge rate and discharging a predetermined second electric quantity at a predetermined preparatory discharge rate;
At least one of the preparation charge rate or the preparation discharge rate is lower than a predetermined normal operation charge rate or a predetermined normal operation discharge rate.

Images