JP7305574B2 - Battery control device, energy management system - Google Patents

Description

TECHNICAL FIELD The present invention relates to technology for controlling charging and discharging operations of a storage battery.

Various electric equipments are connected to the electric power system, and the power energy generated or consumed by each equipment must be balanced. In order to optimize the operation of each facility, it is necessary to solve the optimization problem with the balance as a constraint. In the process of solving an optimization problem, constraints are described by mathematical formulas, and optimum solutions are searched to satisfy the mathematical formulas.

Equations of constraints for batteries placed in the power system are generally represented by Equations 1 and 2 below. Equation 1 is a daytime constraint and Equation 2 is a nighttime constraint. Qp is the electrical energy (kWh) stored in the storage battery, α_p is the remaining coefficient that defines the state of charge (SOC) of the storage battery after T hours, and Pi is the amount of power charged to the storage battery. Time average (kW), Po is the time average (kW) of power discharged from the storage battery.

Qp(1)=α_p×Qp(2)+T×{Pi(1)−Po(1)} (Equation 1)
Qp(2)=α_p×Qp(1)+T×{Pi(2)−Po(2)} (Equation 2)

Non-Patent Document 1 below describes performance degradation over the life cycle of a storage battery. According to the document, it is desirable to operate the storage battery within the optimum operating range in order to maintain the performance of the storage battery (see Abstract).

Journal of The Electrochemical Society, 161 (3) A336-A341 (2014)

In conventional optimization methods, α_p is set to a fixed value. That is, the charging and discharging of the storage battery is controlled so that the electrical energy stored in the storage battery becomes α_p after the time interval T has elapsed. Therefore, it is necessary to charge and discharge the storage battery so that the energy stored in the storage battery becomes α_p each time the time interval T elapses. This impairs the operational flexibility of the storage battery.

As suggested by Non-Patent Document 1, it may be possible to suppress deterioration of the storage battery while ensuring operational flexibility of the storage battery by operating the storage battery within a certain range. However, it is not necessarily clear from Non-Patent Document 1 how to determine the operating range. In addition, the optimum range of SOC of the storage battery changes depending on the state, and it is necessary to carry out an acceleration test.

The present invention has been made in view of the problems described above, and an object of the present invention is to provide a battery control technique capable of suppressing deterioration of the storage battery while ensuring flexibility in operation control of the storage battery. do.

In the battery control device according to the present invention, the storage battery stores at a second time a second power amount obtained according to a result of multiplying a first power amount stored in the storage battery at a first time by a remaining amount coefficient. controlling the storage battery to store; The battery control device uses the charging rate range corresponding to the activation energy range of the storage battery as the allowable range of the remaining capacity coefficient.

According to the battery control device of the present invention, deterioration of the storage battery can be suppressed while ensuring flexibility in operation control of the storage battery. Other features, configurations, advantages, etc. of the present invention will become apparent with reference to the following detailed description.

1 is an example of an electrical installation located within a power system; 4 is a graph showing changes over time in the remaining capacity of a storage battery; 1 is a configuration diagram of a battery control device 100 according to Embodiment 1. FIG. It is a graph which shows the result of having actually measured the time-dependent change of SOH. 4 is an example of an Arrhenius plot of Ea determined according to Equation 3. FIG. It is a figure which shows a mode that the range of Ea is set on an Arrhenius plot. An example of an Eyring plot. FIG. 10 is a diagram showing how Pi-Po is constrained according to an Eyring plot; It is a block diagram of the energy management system 10 which concerns on Embodiment 3. FIG. It is an example of a user interface 11 provided by the energy management system 10 .

<Embodiment 1>
FIG. 1 is an example of an electrical installation located within an electrical power system. Equipment that generates electrical energy, equipment that consumes electrical energy, equipment that generates thermal energy, and equipment that consumes thermal energy are mixed. In Embodiment 1, a method of controlling the storage battery so as to satisfy Equations 1 and 2 will be examined. Therefore, facilities other than the storage battery are omitted.

FIG. 2 is a graph showing changes over time in the remaining capacity of a storage battery. When α_p is a fixed value, the remaining capacity of the storage battery needs to be a value obtained by multiplying full charge (=1) by the remaining capacity coefficient α_p each time the time interval T elapses. This impairs the operational flexibility of the storage battery. Therefore, Embodiment 1 of the present invention provides a method of controlling the storage battery so that α_p has a certain width.

FIG. 3 is a configuration diagram of the battery control device 100 according to the first embodiment. The battery control device 100 is a device that controls charging and discharging operations of the storage battery 200 . The storage battery 200 is a battery that charges the battery cell 210 with electric energy or discharges the electric energy stored in the battery cell 210 . The battery management unit 220 acquires the state of each battery cell 210 (or the entire storage battery 200) and notifies the battery control device 100 of the state. For example, states such as state of charge (SOC), state of health (SOH), output voltage, output current, and activation energy can be acquired.

The battery control device 100 includes a control section 110 and a storage section 120 . Control unit 110 controls the operation of storage battery 200 according to the state of storage battery 200 . Control instructions are executed via the battery management unit 220 . Storage unit 120 is a storage device that stores data and the like used by control unit 110 . For example, it is possible to store data describing Arrhenius plots, Eyring plots, etc., which will be described later.

Battery control device 100 and storage battery 200 are connected via network 300 . As the network 300, an appropriate communication network can be used according to the positional relationship between the battery control device 100 and the storage battery 200. FIG. For example, if both devices are installed at the same place, the network 300 can be configured by electric communication lines or the like. When battery control device 100 controls storage battery 200 from a remote location, network 300 can be configured by a communication network such as the Internet. Other suitable communication networks may be used.

<Embodiment 1: Remaining coefficient range>
When the remaining amount coefficient α_p is used as a value having a certain range instead of a fixed value, the electric energy stored in the storage battery has a certain range each time the time interval T elapses. This corresponds to the fact that the remaining capacity (SOC) for each time interval T has a certain width in FIG. Therefore, the charge/discharge operation of the storage battery should be controlled so that the SOC is within that range at each time interval T.

However, even when trying to ensure the same SOC value, the charging energy to be given to the storage battery differs depending on the state of deterioration (SOH) of the storage battery. Therefore, in the first embodiment, the relationship between SOC and SOH is specified according to the Arrhenius equation, and the SOC range is set for each SOH value.

FIG. 4 is a graph showing the results of actually measuring changes in SOH over time. In FIG. 4, deterioration curves for two SOC values are shown for convenience of description. Furthermore, deterioration curves of the maximum average operating temperature T1 and the minimum average operating temperature T2 are shown for each SOC value. Therefore, in FIG. 4, four deterioration curves are shown.

The Arrhenius equation is represented by Equation 3 below. Ea is the activation energy of the storage battery, AF is the acceleration factor, k is Boltzmann's constant, L1 is the time required to reach a certain SOH (97% in FIG. 4) at temperature T2, L2 is the same SOH (97% in FIG. 4) at temperature T1 4 is the time required to reach 97%). Ea can be obtained for each SOC value according to Equation 3.

FIG. 5 is an example of an Arrhenius plot of Ea determined according to Equation 3. FIG. When Ea is calculated using the actual measurement results shown in FIG. 4 and Equation 3 for each combination of SOC and SOH, plots such as those shown in FIG. 5 can be obtained. By linearly approximating the plot, a straight line as shown in FIG. 5 can be obtained for each SOC value.

FIG. 5 shows plots for four SOC values. Although it is desirable to obtain the gaps between these SOC values (for example, SOC=30%) from actual measurement results, the gaps may be supplemented by interpolation calculation or the like. Alternatively, the gap portion may be replenished by a theoretical calculation formula.

FIG. 6 is a diagram showing how the range of Ea is set on the Arrhenius plot. Here the same plot as in FIG. 5 is shown. As the storage battery 200 deteriorates (the SOH decreases), the required activation energy Ea increases. The relationship between this SOH and Ea is different for each SOC. Therefore, the SOC range to be secured for each time interval T differs depending on the current SOH value. Therefore, in the first embodiment, an appropriate SOC range is determined for each SOH value. How to define an appropriate SOC range is further described below.

The failure rate of the storage battery 200 changes according to the operating period. A failure rate curve representing a change in failure rate over time with respect to an operating period is divided into three stages: an initial failure period, an accidental failure period, and a wear-out failure period. Since the storage battery 200 can be stably operated in the random failure period, it is considered desirable to control the charge/discharge operation of the storage battery 200 so as to match the characteristics of the activation energy in the random failure period. Therefore, in the first embodiment, the range of activation energy required in the random failure period is specified in advance, and the storage battery 200 is charged and discharged within the SOC range corresponding to the activation energy range on the plot of FIG. Let

The inventors have found that the activation energy falls within a certain range during the accidental failure period of the storage battery 200 . Since this range differs depending on the specifications of the storage battery 200, the range can be specified in advance by actual measurement, for example. In the upper part of FIG. 6, Ea=0.3 to 0.6 eV is set as the activation energy range in the random failure period, but it is not limited to this.

The activation energy range corresponds to the SOC range in the upper part of FIG. For example, when SOH=98.5%, Ea=0.3-0.6 eV corresponds to SOC=85%-50%. Similarly, when SOH=99.5%, Ea=0.3-0.6 eV corresponds to SOC=75%-30%. Since the activation energy range in the random failure period is the same regardless of the SOH value, the same activation energy range should be used for each SOH value, as indicated by the horizontal dotted line in the upper part of FIG. become.

The range of activation energies in the random failure period can also be explained as follows. As shown in the upper part of FIG. 6, the slope of the activation energy with respect to SOH (the slope of the straight line in the upper part of FIG. 6) changes monotonically as the SOC decreases. In the accidental failure period of the storage battery 200, the slope of activation energy with respect to SOH falls within a certain range. Therefore, setting the activation energy range so as to fall within the slope range in the random failure period is equivalent to setting the SOC range. Since this tilt range differs for each specification of the storage battery 200, the range can be specified in advance by actual measurement, for example.

By the method shown in the upper part of FIG. 6, the SOC range corresponding to the activation energy range can be obtained for each SOH value. Therefore, the control unit 110 acquires the current SOH value of the storage battery 200, sets the activation energy range corresponding to the SOH value, and sets the SOC range corresponding to the activation energy range to the relationship shown in the upper part of FIG. Identify from Thereby, as shown in the lower part of FIG. 6, the SOC range corresponding to the current SOH value can be obtained.

Control unit 110 can control the charging/discharging operation so that the SOC of storage battery 200 is within the SOC range, thereby keeping the SOC value within the SOC range each time interval T elapses. This corresponds to keeping α_p in Equations 1 and 2 within the SOC range. Therefore, control unit 110 can handle α_p not as a fixed value but as a range value having the same allowable range as the SOC range.

<Embodiment 1: Summary>
The battery control device 100 according to the first embodiment controls the charge/discharge operation of the storage battery 200 according to Equations 1 and 2, and uses the SOC range corresponding to the predetermined activation energy range as the allowable range of α_p. As a result, α_p, which has conventionally been treated as a fixed value, can now be treated as a range value, eliminating the need to adjust the remaining capacity of the storage battery 200 to a fixed value each time the time interval T elapses, thereby improving the operational flexibility of the storage battery 200. do. In addition, since it is not necessary to forcibly perform charging and discharging in order to set the SOC to a fixed value, progress of wear of the storage battery 200 can be suppressed.

The battery control device 100 according to the first embodiment acquires the current SOH of the storage battery 200, obtains the activation energy range corresponding to the SOH value, and plots the SOC range corresponding to the activation energy range on an Arrhenius plot. So specify. This makes it possible to identify a theoretically appropriate SOC range according to the correspondence between SOH and activation energy according to the Arrhenius model.

The battery control device 100 according to the first embodiment is configured so that (a) the activation energy range or (b) the slope of the activation energy with respect to the SOH is within the range of the accidental failure period of the storage battery 200. set the activation energy range. As a result, the storage battery 200 can be operated within the range of activation energy characteristics corresponding to the accidental failure period, so that the progress of wear of the storage battery 200 can be suppressed and the operational flexibility of the storage battery 200 can be improved.

<Embodiment 2>
In conventional optimization methods described in Equations 1 and 2, the Pi-Po range is unconstrained and defined as a freely varying variable. However, if Pi-Po varies too widely, it will wear out the storage battery. This is because charging and discharging of the storage battery must be controlled over a wide range in order for the storage battery to satisfy the constraint conditions according to the wide range of charging and discharging energies (Pi-Po). Accordingly, in a second embodiment of the present invention, a technique for limiting the range of Pi-Po under the constraint conditions described in the first embodiment will be described. Since the configuration of the battery control device 100 is the same as that of the first embodiment, the Pi-Po will be mainly described below.

A temperature difference occurs in the storage battery 200 by charging and discharging the storage battery 200 . By repeating charging and discharging while maintaining a constant average operating temperature, a temperature difference load is applied to the storage battery. Repeated application of temperature differential loads leads to a gradual decrease in SOH. According to the Eyring model, the relationship between the temperature difference that is repeatedly applied and the number of life cycles can be expressed by Equation 4 below. N is the number of life cycles (the number of charge/discharge cycles until the SOH drops to a certain lower limit), A is a constant, ΔT is the applied temperature difference, and n is the temperature difference coefficient.

N=A(ΔT) ^-n (Formula 4)

FIG. 7 is an example of an Eyring plot. Temperature difference ΔT can be generated by charging and discharging storage battery 200 . This can be handled as the temperature difference ΔT given to the storage battery 200 in the temperature difference acceleration test. Therefore, the correspondence between ΔT and (Pi−Po) can be obtained in the process of performing the temperature difference acceleration test. That is, through the temperature difference acceleration test, it is possible to obtain Eyring plots and (Pi-Po) corresponding to each ΔT. The control unit 110 acquires this correspondence relationship and the Eyring plot for each of the maximum average operating temperature T1 and the minimum average operating temperature T2.

FIG. 8 is a diagram showing how Pi-Po is constrained according to the Eyring plot. The storage battery 200 operates within a range between a maximum average operating temperature T1 and a minimum average operating temperature T2. That is, even on the Eyring plot, storage battery 200 needs to operate between temperatures T1 and T2. Using this fact, it is possible to specify the range on the Eyring plot in which the storage battery 200 should operate. Specifically, as shown in FIG. 8, charging/discharging of the storage battery 200 is controlled so as to fall within the region sandwiched by the Eyring plot corresponding to the temperature T1 and the Eyring plot corresponding to the temperature T2.

The temperature difference ΔT and (Pi−Po) can be converted to each other according to the results of the temperature difference acceleration test. Therefore, operating the storage battery 200 within the shaded range in FIG. 8 corresponds to operating the storage battery 200 within the corresponding range of (Pi-Po). By keeping (Pi-Po) within this range, the storage battery 200 can be operated within an operating range corresponding to the range between the maximum average operating temperature T1 and the minimum average operating temperature T2.

The point indicated by the x mark in FIG. 8 is about 8.1 on the vertical axis (the logarithmic value of the number of charge/discharge cycles N), and the corresponding horizontal axis (the logarithmic value of the temperature difference ΔT) on the shaded area. The upper limit is about 1.3. Therefore, the temperature difference ΔT that is allowed to be applied to the storage battery 200 also needs to be suppressed below this value. Control unit 110 acquires the current number of charging/discharging cycles of storage battery 200, acquires the allowable temperature difference allowed in that number of charging/discharging cycles according to the shaded area in FIG. The charging/discharging operation is controlled so as to be within the range of the allowable temperature difference.

<Embodiment 2: Summary>
The battery control device 100 according to the second embodiment specifies the allowable temperature difference that is allowed to be applied to the storage battery 200 according to the temperature difference life curve, and determines the allowable temperature difference as (Pi-Po) (the storage battery 200 and the difference between the discharged power from the storage battery 200). As a result, (Pi-Po) can be suppressed within a range corresponding to the allowable temperature difference. Therefore, (Pi-Po), which has not been restricted at all in the past, can be suppressed within a reasonable range.

The battery control device 100 according to the second embodiment obtains Eyring plots for each of the maximum average operating temperature T1 and the minimum average operating temperature T2, and adjusts the storage battery 200 so that ΔT falls within the area sandwiched by these two plots. control the charging and discharging of This makes it possible to reasonably suppress (Pi-Po) within the range between T1 and T2.

<Embodiment 3>
FIG. 9 is a configuration diagram of an energy management system 10 according to Embodiment 3 of the present invention. The energy management system 10 includes (a) power generating equipment that generates electric power, (b) power consuming equipment that consumes electric power, (c) heat generating equipment that generates heat, and (d) heat consuming equipment that consumes heat. A second control device is provided for controlling at least one of them as a non-controlled device. Here the same power system as in FIG. 1 was used as an example.

The battery control device 100 is the one described in the first and second embodiments, and controls the storage battery 200 . The second control device 401 controls the power generation equipment. Here, an example of controlling a solar cell (PV) is shown. The second controller 402 controls power consuming equipment. The second control device 403 controls heat generating equipment. Here is an example of controlling a cogeneration system and a boiler. A second controller 404 controls the heat consumption equipment and the heat storage tank.

The battery control device 100 and each of the second control devices 401 to 404 control the operation of each facility according to the constraints of the directly controlled facility. Some of the constraints are equations 1 and 2 for storage battery 200 . Other facilities also have their own unique constraints. Each control device implements a control operation so as to satisfy the constraint, and also performs a control operation such that the entire energy management system 10 is optimized within the range that satisfies the constraint. . An example of optimization here is minimizing the operation cost of each facility, but it is not limited to this. Optimization of the entire energy management system 10 may be performed by, for example, one of the control devices, or another control device that optimizes the entire energy management system 10 may be provided.

As one of the constraints, the capacity (maximum capacity) of electrical energy that the storage battery 200 can store can be used. This is because the amount of energy that can be generated or consumed by other equipment differs depending on the maximum capacity of the storage battery 200 . Since the maximum capacity of the storage battery 200 decreases as the storage battery 200 deteriorates, the optimization conditions set when starting the operation of the energy management system 10 are not always optimal as the storage battery 200 deteriorates. Calculating the optimization conditions one by one as the capacity of the storage battery 200 changes results in a large computational load. Since the battery control device 100 according to the present invention can ensure operational flexibility while suppressing deterioration of the storage battery 200, it is possible to maintain the optimization conditions determined on the premise of the capacity of the storage battery 200 at the start of operation over a long period of time. can be done. This is because the progression of deterioration of the storage battery 200 is suppressed.

FIG. 10 is an example of the user interface 11 provided by the energy management system 10. As shown in FIG. The activation energy of storage battery 200 must be within the range described with reference to FIG. The battery control device 100 obtains the current SOH and activation energy of the storage battery 200, and if the obtained activation energy is not within the appropriate activation energy range corresponding to the current SOH value, the user interface 11 displays An alert to that effect can be presented. FIG. 10 shows an example in which the x mark indicates this. Similarly, for other facilities, the user interface 11 can present the status of each facility, violation of constraint conditions, and the like.

<Regarding Modifications of the Present Invention>
The present invention is not limited to the embodiments described above, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

In the above embodiment, the activation energy range (0.3 eV to 0.6 eV in FIG. 6) is obtained by actual measurement, for example, and stored in the storage unit 120 for each SOH value. A value can be read and used to control the storage battery 200 . Therefore, the control unit 110 does not have to perform the process from FIG. 4 to FIG. 6 every time it performs the control operation. Similarly, the Eyring plots at temperatures T1 and T2 (or the values that define the area sandwiched by these two plots) at temperatures T1 and T2 described with reference to FIG. The storage battery 200 can be controlled.

In the above embodiment, the temperature difference ΔT and (Pi−Po) are interconverted according to the results of the temperature difference acceleration test, but these may be interconverted by other appropriate methods. For example, a calculation formula representing the relationship between the temperature difference ΔT and (Pi-Po) can be obtained in advance, and mutual conversion can be performed according to the calculation formula. Other appropriate techniques may be used.

In the above embodiment, the control unit 110 can be configured by hardware such as a circuit device that implements the function, or software that implements the function is executed by an arithmetic device such as a CPU (Central Processing Unit). It can also be configured by

In Embodiment 3, the user interface 11 can be configured using a display or the like provided in any control device. Furthermore, the operator may be allowed to input instructions to the control device on the user interface 11 .

In Embodiment 3, the battery control device 100 and each of the second control devices 401 to 404 can be configured as separate devices, or any of these can be integrated to configure as one control device. . Each control device may be installed at the same place, or may be installed geographically.

10: Energy management system 11: User interface 100: Battery control device 110: Control unit 120: Storage unit 200: Storage batteries 401 to 404: Second control device

Claims (13)

A battery control device for controlling charging and discharging operations of a storage battery,
a control unit that controls charging and discharging operations of the storage battery so that a first amount of power stored in the storage battery at a first time becomes a second amount of power at a second time;
The second amount of power is a value obtained according to the result of multiplying the first amount of power by a remaining amount coefficient,
The control unit sets an allowable activation energy range as the activation energy of the storage battery,
The control unit uses the range of the charging rate of the storage battery corresponding to the activation energy range as the allowable range of the remaining capacity coefficient so that the second electric energy corresponds to the allowable range of the remaining capacity coefficient. A battery control device that controls the charge/discharge operation of the storage battery so that it falls within a range. The control unit sets, as the activation energy range, an allowable range for the activation energy of the storage battery in the current deterioration state of the storage battery,
The control unit uses a value corresponding to the upper limit value of the activation energy range as the upper limit value of the charging rate in the current deterioration state of the storage battery, and uses the value corresponding to the upper limit value of the activation energy range as the lower limit value of the charging rate in the current deterioration state of the storage battery. , using a value corresponding to the lower limit of the activation energy range,
The control unit sets the upper limit value and the lower limit value of the second electric energy by using the upper limit value of the charging rate and the lower limit value of the charging rate as the upper limit value and the lower limit value of the remaining capacity coefficient, respectively. 2. The battery control device according to claim 1, wherein the storage battery is controlled such that the second power amount is within the range. The control unit acquires a plurality of combinations of the deterioration state and the charging rate of the storage battery,
The control unit obtains the activation energy for each combination by applying the acquired combination of the state of deterioration and the state of charge to the Arrhenius equation,
The battery control device according to claim 1, wherein the control unit sets a range to be used as the activation energy range from among the activation energies obtained for each of the combinations. By setting the activation energy range to a value that falls within the range of the activation energy of the storage battery during the accidental failure period of the storage battery, the control unit sets the value within the range of the activation energy characteristics during the accidental failure period of the storage battery. 2. The battery control device according to claim 1, wherein the charge/discharge operation of the storage battery is controlled so as to fall within . The control unit sets the activation energy range so that the slope of the activation energy of the storage battery with respect to the deterioration state of the storage battery falls within the range of the slope in the accidental failure period of the storage battery. 2. The battery control device according to claim 1, wherein the charging/discharging operation of the storage battery is controlled so as to fall within the range of characteristics of activation energy in a failure period. The control unit multiplies the first amount of power by the remaining amount coefficient, further adds the amount of power charged to the storage battery, and further subtracts the amount of power discharged from the storage battery to obtain the second amount of power. is configured to calculate the amount of
The control unit is allowed to apply to the storage battery according to a temperature difference life curve representing the relationship between the temperature difference caused by charging and discharging of the storage battery and the number of charge/discharge cycles of the life of the storage battery. Find the allowable temperature difference,
The control unit converts the allowable temperature difference into an electric energy to obtain a difference between the charging electric energy and the discharging electric energy that are permitted to be applied to the storage battery, and calculates the calculated difference. 2. The battery control device according to claim 1, wherein the charging/discharging operation of the storage battery is controlled according to . 7. The battery control device according to claim 6, wherein the control unit uses, as the allowable temperature difference, a value that is equal to or less than the temperature difference corresponding to the number of charge/discharge cycles in the life of the storage battery on the temperature difference life curve. The control unit obtains, for each average operating temperature of the storage battery, a correspondence relationship between the number of charge/discharge cycles in the life of the storage battery and a temperature difference caused by charging/discharging of the storage battery, thereby determining the average operating temperature of the storage battery. Obtaining the temperature difference life curve for each temperature,
7. The battery control device according to claim 6, wherein the control unit obtains the allowable temperature difference according to the temperature difference life curve corresponding to the average operating temperature of the storage battery. The control unit obtains, as the temperature difference life curve, a first life curve under the maximum average operating temperature of the storage battery and a second life curve under the minimum average operating temperature of the storage battery,
The control unit controls charging and discharging operations of the storage battery such that a temperature difference caused by charging and discharging of the storage battery falls within a region sandwiched between the first life curve and the second life curve. 9. The battery control device according to claim 8. The battery control device according to claim 6, wherein the control section uses a curve derived from a temperature difference acceleration model based on an Eyring model as the temperature difference life curve. The battery control device according to claim 1,
A second control device that controls at least one of power generating equipment that generates electric power, power consuming equipment that consumes electric power, heat generating equipment that generates heat, or heat consuming equipment that consumes heat as a controlled device,
An energy management system comprising: The battery control device controls the storage battery under a constraint condition that the first power amount stored in the storage battery at the first time becomes the second power amount at the second time,
12. The energy management system according to claim 11, wherein the second control device controls the controlled device with at least the amount of electric energy that can be stored in the storage battery as one of the constraints. 12. The energy management system according to claim 11, wherein said energy management system further comprises a user interface that displays the state of at least one of said battery control device and said second control device.

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