JP6454203B2 - Energization control device, self-propelled vehicle, and energization control method - Google Patents

Description

  The present invention relates to control for continuously charging or discharging a storage battery.

  In order to suppress deterioration of the storage battery and use the storage battery safely and with a long life, it is necessary to suppress an increase in temperature when the storage battery is charged or discharged (hereinafter collectively referred to as “energization”). In the normal operating temperature range of the storage battery, there is a correlation between the temperature and the internal resistance in which the internal resistance decreases as the temperature increases. Therefore, the internal resistance of the storage battery can be an important index in energization control for suppressing temperature rise.

  The internal resistance can be accurately measured by changing the current and voltage related to the energization of the storage battery. However, the internal resistance changes dynamically due to various factors. Therefore, when it is desired to know the internal resistance of the storage battery during charging or discharging, it is necessary to temporarily stop charging or discharging and change the energization current and energization voltage for measuring the internal resistance. However, when charging or discharging is resumed, the internal resistance may change, so it is difficult to continue measuring the internal resistance in real time during charging or discharging.

  Therefore, a technique for estimating the internal resistance is required. For example, Patent Document 1 discloses a technique for estimating the internal resistance from the current use state of the storage battery using an internal resistance map that shows all the relationships among the internal resistance, the duration, the SOC (State Of Charge), and the temperature. It is disclosed.

  Patent Document 2 discloses a technique for estimating a temperature transition of an energized storage battery from an internal resistance measured before energization to make a plan for energization.

JP 2013-101484 A JP 2013-106476 A

  For example, when a sufficient amount of time is spent in the midnight hours when the storage battery is not used, the internal heat generation amount of the storage battery can be reduced by lowering the charging current, so the temperature rises easily. Can be suppressed. However, in a situation where both the energization time and the charge amount are targeted, such as aiming for a predetermined charge amount (charge rate increase or charge power amount) within a limited time, the target is achieved by energizing with the temperature rise suppressed. In order to achieve this, it cannot be realized simply by reducing the charging current. This is because the internal heat generation amount is large, so that internal heat generation exceeding heat dissipation occurs, and the internal temperature of the storage battery rises.

  Note that “charge / discharge amount” is used as a term encompassing the charge amount or the discharge amount. “Charge amount” refers to the increase rate of charge rate and charge power amount of the storage battery, and “discharge amount” refers to the decrease rate of charge rate and discharge power amount of the storage battery. Hereinafter, the same terms are used with the same meaning.

  Moreover, although internal resistance can be estimated at any time using the technique of patent document 1, the technique of patent document 1 aims at both energization time and charge / discharge amount, and suppresses the internal heat generation amount of a storage battery. It is not a technology to realize the energization control.

  In addition, since the technique of Patent Document 2 is a technique for repeatedly obtaining an energization plan with the smallest load, if the energization plan that satisfies both the energization time and the charge / discharge amount cannot be obtained, iterative calculation may be said. It seems that it becomes an endless loop and the plan cannot be made.

  The present invention has been devised in view of the above-described problems, and the object of the present invention is to suppress the internal heat generation amount when conducting energization control that targets both energization time and charge / discharge amount. It is to propose a technology for realizing new energization control.

According to a first invention for solving the above-described problems, a given current command value or a current value (hereinafter referred to as a predetermined current range) in a predetermined temperature range in which the internal resistance of the storage battery decreases in response to a temperature rise. An energization control device that performs control to continuously charge or discharge the storage battery (hereinafter collectively referred to as “energization”) by constant current control based on “command value”.
Based on the energization target condition including at least the continuous energization time and the target charge / discharge amount, the command value of the constant current for satisfying the energization target condition when continuously energized with a constant current (hereinafter, this command value is referred to as “reference command value”). A reference command value determining means for determining
The command value is set to be lower than the reference command value at the start of energization, the command value is monotonously increased as time elapses, and the command value is set to be higher than the reference command value when the continuous energization time elapses. Continuous energization control means for performing continuous energization control over energization time;
It is the electricity supply control apparatus provided with.

As another invention,
Constant current control based on a given current command value or current value (hereinafter collectively referred to as “command value”) for a given time in a predetermined temperature range where the internal resistance of the storage battery decreases as the temperature rises Is an energization control method for performing control to continuously charge or discharge the storage battery (hereinafter collectively referred to as “energization”),
Based on the energization target condition including at least the continuous energization time and the target charge / discharge amount, the command value of the constant current for satisfying the energization target condition when continuously energized with a constant current (hereinafter, this command value is referred to as “reference command value”). ”), And
The command value is set to be lower than the reference command value at the start of energization, the command value is monotonously increased as time elapses, and the command value is set to be higher than the reference command value when the continuous energization time elapses. Performing continuous energization control over the energization time;
It is good also as comprising the electricity supply control method containing these.

  According to the first invention and the like, the reference command value for the constant current for satisfying the energization target condition when the energization target condition includes at least the continuous energization time and the target charge / discharge amount is continuously energized. decide. Therefore, the reference command value for satisfying both the energization time and the target charge / discharge amount can be determined. However, in the energization control with a constant current according to the reference command value, the internal heat generation amount of the storage battery remains the same as before.

  Therefore, in the first invention, the command value is lower than the reference command value at the start of energization, the command value is monotonously increased as time elapses, and the command value is continuously higher than the reference command value when the continuous energization time elapses. Perform continuous energization control over the energization time. Thereby, it is energization control aiming at both energization time and charge-and-discharge amount, Comprising: Energization control by which suppression of a temperature rise is anticipated by suppressing internal calorific value of a storage battery is realizable.

In addition, the second invention,
Measuring means for measuring the internal resistance of the storage battery;
Elapsed continuous energization time when energizing the continuous energization time based on the reference command value using the internal resistance before energization by the continuous energization control means, the reference command value, and the continuous energization time Predicting means for predicting the internal resistance of the storage battery at the time,
With
The continuous energization control means uses the internal resistance before energization and the predicted internal resistance to determine a command value at the start of continuous energization and a command value when the continuous energization time has elapsed, and performs the continuous energization control. Do,
It is an electricity supply control device of the 1st invention.

  According to the second aspect of the invention, continuous energization control suitable for the internal resistance of the storage battery can be realized.

  Moreover, 3rd invention is the electricity supply control apparatus of 1st or 2nd invention whose said continuous electricity supply time is 30 second or more and 15 minutes or less.

  According to the third aspect of the invention, energization control suitable for continuous energization for 30 seconds or more and 15 minutes or less can be realized.

In addition, the fourth invention is
The storage battery is mounted on a self-propelled vehicle that self-runs by driving an electric motor using stored power of the storage battery,
While the self-propelled vehicle is stopped at a predetermined stop position, the continuous energization control means controls the charging of the storage battery based on the supplied power from the outside of the self-propelled vehicle. It is an electricity supply control device of any invention.

  Moreover, 5th invention is a self-propelled vehicle provided with the said storage battery and the electricity supply control apparatus of 4th invention.

  According to the fourth or fifth aspect of the invention, when the self-propelled vehicle that drives the electric motor and is self-propelled is stopped at the predetermined stop position, the first to third aspects of the invention are applied, A storage battery mounted on a self-propelled vehicle can be charged.

The figure which shows an example of the electricity supply control in the case of charging a storage battery with a fixed constant current. The figure which shows the example of ideal electricity supply control. The figure which shows an example of a function structure of the electricity supply command value production | generation part of this embodiment. The figure for demonstrating the production | generation procedure of command value. The figure which shows one Example to which the electricity supply command value production | generation part is applied.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the applicable embodiments of the present invention are not limited to the following embodiments.
Although it is a term in the following description, “energization” of the storage battery means charging or discharging. Further, charging or discharging is also referred to as “charging / discharging” as appropriate. “Charge amount” is a term that covers the increase in the state of charge (SOC) of the storage battery and the amount of charge power, and “discharge amount” includes the decrease rate of the charge rate of the storage battery and the amount of discharge power. Is the term. The charge amount and discharge amount are collectively referred to as “charge / discharge amount”.

1. Principle The principle of this embodiment will be described by taking the case of charging as an example of energization of a storage battery. The same principle can be applied to discharge.
Constant current control is usually used for charging and discharging the storage battery. In the case where the storage battery is continuously charged for a certain period of time, a method of charging with a constant constant current during the energization time can be considered. FIG. 1 (1) shows the time change of the charging current i and the internal resistance R of the storage battery in this case, and FIG. 1 (2) shows the state of the stored charge q.

According to FIG. 1 (1) and FIG. 1 (2), since the charging current i is constant during the energization time, charges are accumulated at a constant rate.
The charge q accumulated during the continuous energization time T from the start to the end of charging appears as a fluctuation range ΔSOC of the charging rate SOC with respect to the storage battery capacity Q. Accordingly, if the continuous energization time T and the required fluctuation rate ΔSOC of the target charging rate for which the charging rate of the storage battery is to be increased by charging are given in advance, a constant constant current i for satisfying those conditions is obtained. be able to.

  However, the control for making the charging current i during continuous energization constant is control that ignores the internal heat generation amount (and hence the temperature rise) of the storage battery. Since the storage battery has an internal resistance, Joule heat is generated by the internal resistance when an energizing current flows, and the temperature rises due to the Joule heat. It is known that there is a correlation between the temperature rise and the reduction in the internal resistance R of the storage battery. As shown in FIG. 1 (1), the internal resistance R gradually decreases with the passage of energization time, indicating that a temperature increase has occurred.

Therefore, the object of the present embodiment can be paraphrased as realizing energization control that minimizes the amount of Joule heat generation (also referred to as internal heat generation amount) inside the storage battery.
FIG. 2 (1) and FIG. 2 (2) are diagrams showing examples of ideal energization control. That is, this is an example of energization control that achieves the required fluctuation range ΔSOC of the charging rate during the continuous energization time T and that minimizes the amount of Joule heat generated inside the storage battery. The energization control is performed by constant current control, but is not a fixed value. As shown in FIG. 2A, the charging current i at the start of charging is small and the charging current when the continuous energization time T is reached. Control is performed so that i is set large and the charging current i is monotonously increased during charging. Since the charging current i gradually increases, as shown in FIG. 2 (2), the rate of increase of the accumulated charge q (gradient of the graph) also gradually increases. Hereinafter, the time-series pattern of the accumulated charge q at this time is referred to as “optimal pattern q ₀ (t)”.

The principle for realizing this ideal energization control will be described using a variational method.
First, if the capacity of the storage battery is expressed in terms of electric quantity, Q [c], the continuous energization time is T [s], and the required fluctuation range of the SOC due to energization is ΔSOC [%], it accumulates during the continuous energization time T. The charge that needs to be done is Q × ΔSOC ÷ 100. When the internal resistance of the storage battery is R [Ω] and the energization current is i [A], the heat generation power P [W] of the storage battery is expressed as P = R · i ² . When the calorific value (joule loss) of the storage battery generated during energization is an evaluation function I, I is expressed by the following equation (1).

これを、次の（３）式として定義する。

Here, the current i is expressed as i = dq / dt using the charge q [c] per unit time. Therefore, the evaluation function I can be modified as follows.

This is defined as the following equation (3).

A necessary and sufficient condition for the evaluation function I to take an extreme value (minimum in this case) is to satisfy the Euler's equation represented by the equation (4).

Since the second term on the left side of the equation (4) is zero, the following equation (5) is derived.

That is, equations (6) to (7) are derived.

（８）式を満たす制御を行うこと、すなわち、内部抵抗Ｒに反比例するように通電電流ｉを定めることが理想的な通電制御となる。 Therefore, from equation (7), R · i = constant is a necessary condition for the optimum pattern q ₀ (t). Since the internal resistance R changes over time,

It is ideal energization control to perform control satisfying the equation (8), that is, to determine the energization current i so as to be inversely proportional to the internal resistance R.

2. Specific Control Method In the above description of the principle, it has been described that the energization control that minimizes the amount of Joule heat generated inside the storage battery can be realized by controlling the energization current so as to be inversely proportional to the internal resistance of the storage battery.

However, when it is desired to know the internal resistance of the storage battery during charging / discharging, it is necessary to temporarily stop charging / discharging and change the energization current and energization voltage for measuring the internal resistance. For this reason, it is difficult to measure internal resistance in real time during continuous charge and discharge of a storage battery.
Therefore, in the present embodiment, the following specific control method is adopted.

FIG. 3 is a diagram illustrating an example of a functional configuration of the energization command value generation unit 10 for realizing the control method of the present embodiment.
The energization command value generation unit 10 is a functional unit incorporated in an energization control device for controlling charging / discharging of the storage battery, and may be realized by a processor such as a CPU executing a program for arithmetic control. Alternatively, a dedicated circuit module may be used.

The energization control device in which the energization command value generation unit 10 is incorporated is a device that charges and discharges a storage battery by constant current control. The energization control device calculates the command value of the energizing current for charging / discharging or the current value of the energizing current (hereinafter collectively referred to as “command value”), and stores the storage battery with the energizing current according to this command value. Charge and discharge. Also in a conventionally known energization control device, a command value is similarly generated internally and energization control of the storage battery is executed.
The functional unit that generates the command value is the energization command value generation unit 10.

  In FIG. 3, the energization command value generation unit 10 includes a reference command value generation unit 12, an internal resistance prediction unit 14, a resistance change rate calculation unit 16, and a command value pattern generation unit 18. When the time T, the storage battery capacity Q, the required fluctuation width ΔSOC, and the internal resistance R (0) before energization are input, a command value pattern that is a time-series command value during the energization time T is generated and output. .

  The energization time T, the storage battery capacity Q, and the required fluctuation range ΔSOC are examples of energization target conditions. The energization time T is a time for continuously energizing the storage battery. The storage battery capacity Q is the capacity of the storage battery that is subject to energization control. The required fluctuation width ΔSOC is the width of the SOC that is changed by energization during the current energization time T, meaning an increase width in the case of charging, and a decrease width in the case of discharging. Since the storage battery capacity Q and the required fluctuation width ΔSOC indicate the target charge / discharge amount, the storage battery capacity Q and the required fluctuation width ΔSOC may be replaced with the target power amount for charging or discharging.

The reference command value generation unit 12 varies the SOC of the storage battery by the required variation width ΔSOC when the command value is constant during the energization time T from the energization time T, the storage battery capacity Q, and the required variation width ΔSOC. _Is generated as a reference command value i _cc-ref . In generating the reference command value i _cc-ref , a known calculation method can be applied.

The energization command value generation unit 10 may omit the reference command value generation unit 12 and selectively determine the reference command value i _cc-ref or set a predetermined value. For example, when the specification of the storage battery to be controlled is determined in advance, and continuous energization is once, there is no possibility of reaching the upper limit SOC if charging, and in the case of energization not reaching the lower limit SOC if discharging, The reference command value generation unit 12 can be omitted. Specifically, when the energization is charging, when the charging is started, the storage battery is always in a state of being lowered from the upper limit SOC by a certain level or more, and charging is performed in an insufficient time before reaching the upper limit SOC from this state. Is the case. For example, in a train that self-runs by driving an electric motor with electric power of a mounted storage battery, the case where the storage battery is charged at the intermediate station on the traveling route during the stop time is applicable. In this case, the reference command value i _cc-ref may be a predetermined value, or may be selectively selected from a plurality of candidate reference command values according to the energization time T (stop time) corresponding to the stop time. It may be decided.

The internal resistance predicting unit 14 determines the elapsed internal resistance R (T) from the reference command value i _cc-ref generated by the reference command value generating unit 12, the energization time T, and the pre-energization internal resistance R (0). Predict. The elapsed internal resistance R (T) is the internal resistance of the storage battery at the time when the energization time T has elapsed since the start of energization. The internal resistance R (0) before energization is measured by an internal resistance measurement unit (not shown). A known method can be employed as the measurement method. The internal resistance prediction unit 14 substitutes the reference command value i _cc-ref , the energization time T, and the internal resistance R (0) before energization into a predetermined thermal model expression of the storage battery to be controlled, The elapsed internal resistance R (T) can be calculated as a predicted value.

The resistance change rate calculation unit 16 calculates the resistance change rate γ _R of the internal resistance R from the pre-energization internal resistance R (0) and the elapsed internal resistance R (T) predicted by the internal resistance prediction unit 14. For example, it can be calculated as γ _R = R (T) / R (0).

Next, the command value pattern generation unit 18 outputs a final output from the reference command value i _cc-ref generated by the reference command value generation unit 12 and the resistance change rate γ _R calculated by the resistance change rate calculation unit 16. A command value i _ref is generated. Here, the command value i _ref can be generated as a command value pattern including a command value at each timing within the energization time T. More specifically, the command value pattern generation unit 18 is inversely proportional to the resistance change rate γ _R (= R (T) / R (0)) at each timing (time t, 0 ≦ t ≦ T) during energization. Thus, the command value of the timing is determined.

When the resistance change rate γ _R is constant, the command value pattern can be generated more easily. The case of charging will be described as an example.
FIG. 4 is a diagram for explaining a procedure for generating a command value pattern in the case of charging. Since the resistance change rate γ _R is constant, the command value inversely proportional to this is lower than the reference command value i _cc-ref by a constant value Δ at the start of charging, and the reference command value i _{cc- The} value is larger than _ref by the same constant value Δ. When expressed by an equation, the following equation (9) is obtained.

When this equation (9) is arranged with respect to Δ, the following equation (10) is obtained.

Therefore, the command value i _ref is the only low Δ given by (10) than the reference command value i _cc-ref is at the charge start time, than the reference command value i _cc-ref at the time energization time T has passed ( It can be determined as a value that is larger by Δ obtained by the equation (10). Further, the command value i _ref from the start of charging to the time point when the energization time T has elapsed is assumed to be a monotonically increasing linear change as shown in FIG. By doing so, it is ensured that the accumulated charge amount is the same as when charging with a constant current of the reference command value i _cc-ref . In this way, a command value pattern can be generated.
Based on the command value generated by the command value pattern generation unit 18, the energization control device controls the energization of the storage battery.

Note that the resistance change rate calculation unit 16 may variably set the resistance change rate γ _R. For example, it is also possible to determine the resistance change rate gamma _R to gradually reduce the rate of resistance change gamma _R with the passage of current time. The resistance change rate γ _R may be variably determined according to the internal resistance R (0) before energization. Further, the resistance change rate γ _R may be variably determined according to the energization time T. In any case, the command value pattern generation unit 18 can generate the command value i _ref as a monotonically increasing command value pattern.

3. Example Next, an example in which the energization command value generation unit 10 is applied will be described. FIG. 5 shows an example of a so-called storage battery-driven train and a charging facility for charging the storage battery of the train. The train 100 is a train called an overhead storage battery train including a converter device 110, a storage battery 120, an inverter device 130, and an electric motor 140, and is a self-propelled vehicle. A charging station 200 for charging the storage battery 120 of the train 100 is provided as a charging facility at each station on the route on which the train 100 travels. The charging station 200 can charge the storage battery 120 of the train 100 stopped at the station through a train line that is an overhead line provided at the station where the charging station 200 is installed. The train 100 charges the storage battery 120 when the station stops, and travels between stations based on the stored power of the storage battery 120.

  Specifically, when the train 100 stops at a predetermined stop position of each station, the pantograph is raised and brought into contact with the train line. Since electric power is supplied to the train line from the charging station 200, the train 100 can charge the storage battery 120 through the train line.

The charging control at this time is performed by the converter device 110 that converts the electric power supplied from the train line into electric power for charging. That is, as shown in FIG. 5 (3), the converter device 110 includes the energization control device 112 having the energization command value generation unit 10 described with reference to FIG. 3, and the margin time from the stop time at the station. The command value is based on the energization target condition with the energization time T as the energization time T and the amount of power required to travel to the next station multiplied by a predetermined safety factor of "1.0" or more as the target charge amount. i _ref is generated, and the storage battery 120 is charged based on the command value i _ref .

  When energization time T elapses, converter device 110 stops charging. Then, the train 100 lowers the pantograph, and this time, the inverter device 130 converts the stored power of the storage battery 120 into power for driving the electric motor 140 to drive the electric motor 140, and departs toward the next station.

  The energization time T can be determined based on the stop time of the station, and is preferably set in the range of 30 seconds to 15 minutes in the case of the present embodiment.

The charging station 200 can be configured as a substation that converts commercial power into overhead voltage and supplies it to the train line, but can also be configured with a storage battery 220 for charging the train 100. Specifically, the charging station 200 includes a converter device 210 and a storage battery 220, and when the train 100 stops at the station and performs charging, the converter device 210 supplies the stored power of the storage battery 220 to the train line. To supply. As shown in FIG. 5 (3), the converter device 210 includes an energization control device 212 having an energization command value generation unit 10, and energizes a time obtained by subtracting a margin time from the stop time of the train 100 at the station. and time T, and generates a command value i _ref based on the amount of power multiplied by a predetermined safety factor to the amount of power required to travel to the next station energization target conditions with the goal discharge amount, based on the command value i _ref The storage battery 220 is discharged.

  Charging of the storage battery 220 at the charging station 200 can be performed at a time when the train 100 is not charged. A configuration is also possible in which the storage battery 220 has a large capacity and the storage battery 220 is fully charged with power from commercial power in the midnight or the like when the electricity rate is low, so that no charge during the day is required. Of course, the storage battery 220 may be charged by combining natural energy power generation such as solar power generation or wind power generation.

4). According to the present embodiment, based on the energization target condition including at least the energization time and the target charge / discharge amount, the reference command value of the constant current for satisfying the energization target condition when continuously energized with a constant current is determined. To do. Therefore, the reference command value for satisfying both the energization time and the target charge / discharge amount can be determined. However, in the energization control with a constant current according to the reference command value, the internal heat generation amount of the storage battery remains the same as before.

  Therefore, continuous energization control over continuous energization time is performed so that the command value is lower than the reference command value at the start of energization, the command value is monotonously increased as time elapses, and the command value is higher than the reference command value when continuous energization time elapses. Do. Thereby, it is energization control aiming at both energization time and charge-and-discharge amount, Comprising: The energization control by which temperature rise suppression is anticipated by suppressing the internal calorific value of a storage battery is realizable.

5. Modified Embodiment The applicable form of the present invention is not limited to the above-described embodiment.
For example, as the energization target condition, a charging rate increase at a certain point during energization can be included. More specifically, achieving 70% of the required fluctuation range ΔSOC at the intermediate point of the energization time T can be included as a further energization target condition.

  Although an example of a train has been described as an application example of the energization command value generation unit 10, it can also be applied to an automobile. For example, an electric vehicle or a hybrid vehicle. In this case, a configuration in which charging stations similar to the charging station 200 shown in FIG. 5 are provided in various places like a conventional gas station, and is electrically connected to the automobile by a cable instead of the train line of FIG. . The charging fee can be determined according to the energization target condition.

112, 212 Energization control device 10 Energization command value generation unit 12 Reference command value generation unit 14 Internal resistance prediction unit 16 Resistance change rate calculation unit 18 Command value pattern generation unit

Claims (6)

Constant current control based on a given current command value or current value (hereinafter collectively referred to as “command value”) for a given time in a predetermined temperature range where the internal resistance of the storage battery decreases as the temperature rises Is an energization control device that performs control to continuously charge or discharge the storage battery (hereinafter collectively referred to as “energization”),
The constant current command value (hereinafter referred to as “reference command value”) that can be used as a target charge / discharge amount by continuously energizing the storage battery at a constant current for a continuous energization time is used as the continuous energization. a reference command value determining means for determining based on the time and energizing the target conditions including at least the target discharge amount,
A continuous current control over the continuous current time included in the current target conditions for monotonically increasing the command value as time elapses, the the lower command value than the reference command value at the start of energization, the time course of the continuous energization time a continuous energization control means for realizing a target charge-and-discharge amount included in the current target conditions in a continuous current control, to perform the command value such that higher command value than the reference command value,
An energization control device comprising: Measuring means for measuring the internal resistance of the storage battery;
Elapsed continuous energization time when energizing the continuous energization time based on the reference command value using the internal resistance before energization by the continuous energization control means, the reference command value, and the continuous energization time Predicting means for predicting the internal resistance of the storage battery at the time,
With
The continuous energization control means uses the internal resistance before energization and the predicted internal resistance to determine a command value at the start of continuous energization and a command value when the continuous energization time has elapsed, and performs the continuous energization control. Do,
The energization control apparatus according to claim 1. The continuous energization time is 30 seconds to 15 minutes,
The energization control apparatus according to claim 1 or 2. The storage battery is mounted on a self-propelled vehicle that self-runs by driving an electric motor using stored power of the storage battery,
The said continuous electricity supply control means controls the charge to the said storage battery based on the electric power supplied from the exterior of the said self-propelled vehicle, when the said self-propelled vehicle stops at the predetermined stop position. The energization control device according to any one of the above.   The self-propelled vehicle provided with the said storage battery and the electricity supply control apparatus of Claim 4. Constant current control based on a given current command value or current value (hereinafter collectively referred to as “command value”) for a given time in a predetermined temperature range where the internal resistance of the storage battery decreases as the temperature rises Is an energization control method for performing control to continuously charge or discharge the storage battery (hereinafter collectively referred to as “energization”),
The constant current command value (hereinafter referred to as “reference command value”) that can be used as a target charge / discharge amount by continuously energizing the storage battery at a constant current for a continuous energization time is used as the continuous energization. and determining based on the time and the target charge-and-discharge amount to at least including energizing target conditions,
A continuous current control over the continuous current time included in the current target conditions for monotonically increasing the command value as time elapses, the the lower command value than the reference command value at the start of energization, the time course of the continuous energization time and realizing the target charge-and-discharge amount contained in the current target condition by the continuous energization control, the command value such that higher command value than the reference command value,
Energization control method.

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