JP7536720B2

JP7536720B2 - Secondary battery system, control method, and control program

Info

Publication number: JP7536720B2
Application number: JP2021130229A
Authority: JP
Inventors: 裕也稲垣; 尚志赤嶺
Original assignee: Primearth EV Energy Co Ltd
Current assignee: Primearth EV Energy Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2024-08-20
Anticipated expiration: 2041-08-06
Also published as: CN115706257B; CN115706257A; JP2023024127A

Description

本発明は、システム内の電力を制御する二次電池システム、制御方法及び制御プログラムに関する。 The present invention relates to a secondary battery system, a control method, and a control program for controlling power within the system.

従来、出力型の二次電池及び容量型の二次電池が利用されている。出力型の二次電池は、容量型の二次電池よりも蓄電容量が小さいが、単位時間当たりの充放電性能が高いという特徴がある。一方、容量型の二次電池は、出力型の二次電池よりも単位時間当たりの充放電性能が低いが、蓄電容量が大きいという特徴がある。このような出力型の二次電池及び容量型の二次電池の双方を含む二次電池システムにおいて電力を制御する種々の技術が提案されている。 Conventionally, output-type secondary batteries and capacity-type secondary batteries have been used. Output-type secondary batteries have a smaller storage capacity than capacity-type secondary batteries, but are characterized by high charge/discharge performance per unit time. On the other hand, capacity-type secondary batteries have a lower charge/discharge performance per unit time than output-type secondary batteries, but are characterized by large storage capacity. Various technologies have been proposed for controlling power in secondary battery systems that include both output-type secondary batteries and capacity-type secondary batteries.

特許文献１が開示する二次電池システムは、出力型電池の温度に基づいて容量型電池の入出力電流を制御する。 The secondary battery system disclosed in Patent Document 1 controls the input and output current of the capacity battery based on the temperature of the output battery.

また、特許文献２が開示する二次電池システムは、容量型蓄電装置及び出力型蓄電装置の劣化状態及び二次電池システムの需要電力量に基づいて、容量型蓄電装置及び出力型蓄電装置への電力量の配分を制御する。 The secondary battery system disclosed in Patent Document 2 controls the distribution of power to the capacitance-type storage device and the output-type storage device based on the deterioration state of the capacitance-type storage device and the output-type storage device and the power demand of the secondary battery system.

国際公開第２０１８／０７４５０２号International Publication No. 2018/074502 国際公開第２０１９／１８６６５９号International Publication No. 2019/186659

しかしながら、特許文献１が開示する二次電池システムは、出力型電池の温度以外の要因によって出力型電池及び容量型電池の入力電力を制御できないという問題があった。同様に、特許文献２が開示する二次電池システムは、容量型蓄電装置及び出力型蓄電装置の劣化状態及び二次電池システムの需要電力量以外の要因によって出力型電池及び容量型電池の入力電力を制御できないという問題があった。 However, the secondary battery system disclosed in Patent Document 1 has a problem in that it cannot control the input power of the output-type battery and the capacity-type battery due to factors other than the temperature of the output-type battery. Similarly, the secondary battery system disclosed in Patent Document 2 has a problem in that it cannot control the input power of the output-type battery and the capacity-type battery due to factors other than the degradation state of the capacity-type power storage device and the output-type power storage device and the amount of power demanded by the secondary battery system.

本発明は、このような問題を解決するものであり、様々な要因に基づいて、出力型電池及び容量型電池の入力電力を制御可能な二次電池システム、制御方法及び制御プログラムを提供することを目的とする。 The present invention aims to solve these problems and provide a secondary battery system, control method, and control program that can control the input power of an output-type battery and a capacity-type battery based on various factors.

本発明の一態様に係る二次電池システムは、
第１の二次電池と、
第１の二次電池よりも単位時間当たりの充放電性能が高い第２の二次電池と、
制御情報に基づき、第１の二次電池及び第２の二次電池の入力電力を制御する電力制御装置とを含み、
制御情報には、電力供給先において予測される天候を示す予測天候情報、電力供給先の日時毎の電力需要を示す電力需要情報、売電価格を示す売電情報、第１の二次電池の温度及び第２の二次電池の温度を示す温度情報、第１の二次電池の蓄電量を示す第１の蓄電量情報及び二次電池システムに入力される電力を示す入力電力情報、第１の二次電池内の塩濃度を示す塩濃度情報、並びに第２の二次電池の蓄電量を示す第２の蓄電量情報のうちの少なくとも１つが含まれる。 A secondary battery system according to one aspect of the present invention comprises:
A first secondary battery;
a second secondary battery having a higher charge/discharge performance per unit time than the first secondary battery;
a power control device that controls input power of the first secondary battery and the second secondary battery based on the control information;
The control information includes at least one of predicted weather information indicating the weather predicted at the power supply destination, power demand information indicating the power demand for each date and time at the power supply destination, power selling information indicating the power selling price, temperature information indicating the temperature of the first secondary battery and the temperature of the second secondary battery, first stored power amount information indicating the amount of power stored in the first secondary battery and input power information indicating the power input to the secondary battery system, salt concentration information indicating the salt concentration in the first secondary battery, and second stored power amount information indicating the amount of power stored in the second secondary battery.

また、電力制御装置は、予測天候情報が降雨を示す場合、第１の二次電池の入力電力を制限すると共に、第２の二次電池の入力電力を増やすことができる。 In addition, when the predicted weather information indicates rainfall, the power control device can limit the input power of the first secondary battery and increase the input power of the second secondary battery.

さらに、第１の二次電池は、第２の二次電池よりも蓄電容量が大きく、
電力制御装置は、電力需要情報に基づき、電力供給先における消費電力が少ない時に、第１の二次電池の入力電力を増やすことができる。 Furthermore, the first secondary battery has a larger storage capacity than the second secondary battery,
The power control device can increase the input power of the first secondary battery when the power consumption at the power supply destination is low, based on the power demand information.

さらに、電力制御装置は、売電情報が既定の売電価格以上である場合、第１の二次電池の入力電力を制限すると共に、第２の二次電池の入力電力を増やすことができる。 Furthermore, when the power selling information is equal to or higher than a predetermined power selling price, the power control device can limit the input power of the first secondary battery and increase the input power of the second secondary battery.

さらに、電力制御装置は、温度情報に基づき、温度の高い二次電池の入力電力を減らし、温度の低い二次電池の入力電力を増やすことができる。 Furthermore, the power control device can reduce the input power of a secondary battery with a higher temperature and increase the input power of a secondary battery with a lower temperature based on the temperature information.

さらに、第１の二次電池がインターカレータを含む二次電池である場合、
電力制御装置は、第１の蓄電量情報が示す第１の二次電池の蓄電量が既定の第１の蓄電量を超え、かつ、入力電力情報が示す電力が既定の電力を超えるとき、第１の二次電池の入力電力を制限すると共に、第２の二次電池の入力電力を増やすことができる。 Furthermore, when the first secondary battery is a secondary battery including an intercalator,
When the amount of stored power of the first secondary battery indicated by the first stored power information exceeds a predetermined first amount of stored power and the power indicated by the input power information exceeds a predetermined power, the power control device can limit the input power of the first secondary battery and increase the input power of the second secondary battery.

さらに、電力制御装置は、塩濃度情報に基づき、第１の二次電池内の塩濃度の斑が発生する予兆があると判定した場合、第１の二次電池の入力電力を制限すると共に、第２の二次電池の入力電力を増やすことができる。 Furthermore, if the power control device determines, based on the salt concentration information, that there are signs of unevenness in the salt concentration in the first secondary battery, it can limit the input power of the first secondary battery and increase the input power of the second secondary battery.

さらに、電力制御装置は、第２の二次電池への電力供給を優先的に行い、
第２の蓄電量情報が示す第２の二次電池の蓄電量が既定の第２の蓄電量を超える場合、電力制御装置は、第２の二次電池の入力電力を制限すると共に、第１の二次電池の入力電力を増やすことができる。 Furthermore, the power control device prioritizes power supply to the second secondary battery,
When the stored power amount of the second secondary battery indicated by the second stored power amount information exceeds a default second stored power amount, the power control device can limit the input power of the second secondary battery and increase the input power of the first secondary battery.

さらに、電力制御装置は、第２の蓄電量情報が示す第２の二次電池の蓄電量が既定の第３の蓄電量以下となった場合、電力制御装置は、第１の二次電池の入力電力を制限すると共に、第２の二次電池の入力電力を増やすことができる。 Furthermore, when the amount of stored power in the second secondary battery indicated by the second stored power information becomes equal to or less than a third predetermined amount of stored power, the power control device can limit the input power of the first secondary battery and increase the input power of the second secondary battery.

さらに、入力電力を分割して第１の二次電池及び第２の二次電池に供給する電力分割装置を含み、
電力分割装置は、入力電力の低周波成分を第１の二次電池に入力し、入力電力の高周波成分を第２の二次電池に入力し、
電力制御装置は、電力分割装置が出力する電力量を調整することにより、第１の二次電池及び第２の二次電池に供給される電力量を調整することができる。 Further, a power division device that divides the input power and supplies the divided power to the first secondary battery and the second secondary battery,
The power dividing device inputs a low-frequency component of the input power to the first secondary battery and a high-frequency component of the input power to the second secondary battery;
The power control device can adjust the amount of power supplied to the first secondary battery and the second secondary battery by adjusting the amount of power output by the power division device.

本発明の一態様に係る第１の二次電池と第１の二次電池よりも単位時間当たりの充放電性能が高い第２の二次電池とを含む二次電池システムの電力を制御する制御方法は、
コンピュータが、制御情報に基づき、第１の二次電池及び第２の二次電池の入力電力を制御し、
制御情報には、電力供給先において予測される天候を示す予測天候情報、電力供給先の日時毎の電力需要を示す電力需要情報、売電価格を示す売電情報、第１の二次電池の温度及び第２の二次電池の温度を示す温度情報、第１の二次電池の蓄電量を示す第１の蓄電量情報及び二次電池システムに入力される電力を示す入力電力情報、第１の二次電池内の塩濃度を示す塩濃度情報、並びに第２の二次電池の蓄電量を示す第２の蓄電量情報のうちの少なくとも１つが含まれる。 According to one aspect of the present invention, there is provided a method for controlling power of a secondary battery system including a first secondary battery and a second secondary battery having a higher charge/discharge performance per unit time than the first secondary battery, the method comprising the steps of:
a computer controls input power of the first secondary battery and the second secondary battery based on the control information;
The control information includes at least one of predicted weather information indicating the weather predicted at the power supply destination, power demand information indicating the power demand for each date and time at the power supply destination, power selling information indicating the power selling price, temperature information indicating the temperature of the first secondary battery and the temperature of the second secondary battery, first stored power amount information indicating the amount of power stored in the first secondary battery and input power information indicating the power input to the secondary battery system, salt concentration information indicating the salt concentration in the first secondary battery, and second stored power amount information indicating the amount of power stored in the second secondary battery.

さらに、本発明の一態様に係る第１の二次電池と第１の二次電池よりも単位時間当たりの充放電性能が高い第２の二次電池とを含む二次電池システムの電力を制御する制御プログラムは、
コンピュータに対し、制御情報に基づき、第１の二次電池及び第２の二次電池の入力電力を制御させ、
制御情報には、電力供給先において予測される天候を示す予測天候情報、電力供給先の日時毎の電力需要を示す電力需要情報、売電価格を示す売電情報、第１の二次電池の温度及び第２の二次電池の温度を示す温度情報、第１の二次電池の蓄電量を示す第１の蓄電量情報及び二次電池システムに入力される電力を示す入力電力情報、第１の二次電池内の塩濃度を示す塩濃度情報、並びに第２の二次電池の蓄電量を示す第２の蓄電量情報のうちの少なくとも１つが含まれる。 Furthermore, a control program for controlling power of a secondary battery system including a first secondary battery according to an aspect of the present invention and a second secondary battery having a higher charge/discharge performance per unit time than the first secondary battery,
causing a computer to control input power of the first secondary battery and the second secondary battery based on the control information;
The control information includes at least one of predicted weather information indicating the weather predicted at the power supply destination, power demand information indicating the power demand for each date and time at the power supply destination, power selling information indicating the power selling price, temperature information indicating the temperature of the first secondary battery and the temperature of the second secondary battery, first stored power amount information indicating the amount of power stored in the first secondary battery and input power information indicating the power input to the secondary battery system, salt concentration information indicating the salt concentration in the first secondary battery, and second stored power amount information indicating the amount of power stored in the second secondary battery.

本発明により、様々な要因に基づいて、出力型電池及び容量型電池の入力電力を制御可能な二次電池システム、制御方法及び制御プログラムを提供することができる。 The present invention provides a secondary battery system, control method, and control program that can control the input power of an output-type battery and a capacity-type battery based on various factors.

本発明の一実施形態に係る二次電池システムを示す図である。1 is a diagram showing a secondary battery system according to an embodiment of the present invention; 本発明の一実施形態に係る電力制御装置の構成を示すブロック図である。1 is a block diagram showing a configuration of a power control device according to an embodiment of the present invention; 二次電池システムが必要とされる電力（ＤＰ）と、容量型電池の入力電力（ＣＰ）と、出力型電池の入力電力（ＯＰ）との関係を示す図である。A diagram showing the relationship between the power (DP) required by the secondary battery system, the input power (CP) of the capacitance type battery, and the input power (OP) of the output type battery. 容量型電池及び出力型電池の容量と出力の関係を示す図である。FIG. 2 is a diagram showing the relationship between capacity and output of a capacity-type battery and an output-type battery.

以下、図面を参照して、本発明の一実施形態について説明する。図１は、本発明の一実施形態に係る二次電池システム１を示す図である。二次電池システム１は、外部から供給された電力を蓄積して供給するシステムである。例えば、二次電池システム１は、電力会社等が管理する電力システムとして実装することができる。二次電池システム１は、容量型電池１０と、出力型電池２０と、電力制御装置３０と、電力分割装置４０とを含む。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a secondary battery system 1 according to an embodiment of the present invention. The secondary battery system 1 is a system that stores and supplies power supplied from an external source. For example, the secondary battery system 1 can be implemented as a power system managed by a power company or the like. The secondary battery system 1 includes a capacity type battery 10, an output type battery 20, a power control device 30, and a power division device 40.

容量型電池１０は、出力型電池２０よりも蓄電容量が大きい二次電池である。容量型電池１０は、第１の二次電池に相当する。出力型電池２０は、容量型電池１０よりも単位時間当たりの充放電性能が高い二次電池である。出力型電池２０は、第２の二次電池に相当する。図１に示すように、容量型電池１０及び出力型電池２０は、並列に接続される。なお、図１には、単一の容量型電池１０及び出力型電池２０が示されているが、二次電池システム１は、複数の容量型電池１０及び出力型電池２０を含むことができる。この場合、複数の容量型電池１０及び複数の出力型電池２０は、それぞれ並列に接続される。 The capacity type battery 10 is a secondary battery having a larger storage capacity than the output type battery 20. The capacity type battery 10 corresponds to a first secondary battery. The output type battery 20 is a secondary battery having a higher charge/discharge performance per unit time than the capacity type battery 10. The output type battery 20 corresponds to a second secondary battery. As shown in FIG. 1, the capacity type battery 10 and the output type battery 20 are connected in parallel. Note that although FIG. 1 shows a single capacity type battery 10 and an output type battery 20, the secondary battery system 1 can include a plurality of capacity type batteries 10 and output type batteries 20. In this case, the plurality of capacity type batteries 10 and the plurality of output type batteries 20 are each connected in parallel.

電力分割装置４０は、電力制御装置３０の制御に従い、入力電力を分割して容量型電池１０及び出力型電池２０に供給する装置である。電力分割装置４０の具体例としては、ローパスフィルタ等が挙げられる。電力分割装置４０は、入力電力の低周波成分を容量型電池１０に供給すると共に、入力電力の高周波成分を出力型電池２０に供給することができる。 The power splitting device 40 is a device that splits the input power and supplies it to the capacity battery 10 and the output battery 20 under the control of the power control device 30. A specific example of the power splitting device 40 is a low-pass filter. The power splitting device 40 can supply the low-frequency components of the input power to the capacity battery 10 and the high-frequency components of the input power to the output battery 20.

電力制御装置３０は、種々の制御情報に基づき、容量型電池１０及び出力型電池２０の入力電力を制御する装置である。電力制御装置３０は、電力分割装置４０が出力する電力量を調整することにより、容量型電池１０及び出力型電池２０に供給される電力量を調整することができる。 The power control device 30 is a device that controls the input power of the capacity battery 10 and the output battery 20 based on various control information. The power control device 30 can adjust the amount of power supplied to the capacity battery 10 and the output battery 20 by adjusting the amount of power output by the power splitting device 40.

例えば、容量型電池１０の入力電力を制限する場合、電力制御部３０１は、電力分割装置４０に対し、より低周波数の電力を出力させることにより、容量型電池１０の入力電力を制限できる。具体的には、電力制御部３０１は、電力分割装置４０が容量型電池１０に供給可能な電力の周波数帯域を絞ることにより、電力分割装置４０から容量型電池１０に供給される電力量を減少させ、容量型電池１０の入力電力を減らすことができる。この場合、電力分割装置４０から出力型電池２０に供給される電力量が増加し、出力型電池２０の入力電力が増える。 For example, when limiting the input power of the capacity battery 10, the power control unit 301 can limit the input power of the capacity battery 10 by causing the power splitting device 40 to output power of a lower frequency. Specifically, the power control unit 301 can reduce the amount of power supplied from the power splitting device 40 to the capacity battery 10 by narrowing the frequency band of power that the power splitting device 40 can supply to the capacity battery 10, thereby reducing the input power of the capacity battery 10. In this case, the amount of power supplied from the power splitting device 40 to the output battery 20 increases, and the input power of the output battery 20 increases.

容量型電池１０の入力電力を増加させる場合、電力制御部３０１は、電力分割装置４０に対し、より高周波の電力を出力させることにより、容量型電池１０の入力電力を増加させることができる。具体的には、電力制御部３０１は、電力分割装置４０が容量型電池１０に供給可能な電力の周波数帯域を拡げることにより、電力分割装置４０から容量型電池１０に供給される電力量を増加させ、容量型電池１０の入力電力を増やすことができる。この場合、電力分割装置４０から出力型電池２０に供給される電力量が減少し、出力型電池２０の入力電力が減る。 When increasing the input power of the capacity battery 10, the power control unit 301 can increase the input power of the capacity battery 10 by causing the power splitting device 40 to output power of a higher frequency. Specifically, the power control unit 301 can increase the amount of power supplied from the power splitting device 40 to the capacity battery 10 and increase the input power of the capacity battery 10 by expanding the frequency band of power that the power splitting device 40 can supply to the capacity battery 10, thereby increasing the amount of power supplied from the power splitting device 40 to the capacity battery 10. In this case, the amount of power supplied from the power splitting device 40 to the output battery 20 decreases, and the input power of the output battery 20 decreases.

図２は、本発明の一実施形態に係る電力制御装置３０の構成を示すブロック図である。電力制御装置３０は、通信インタフェース（Ｉ／Ｆ）３１と、記憶装置３２と、演算装置３３とを備える。通信Ｉ／Ｆ３１は、電力制御装置３０と他の装置との間で信号の送受信を行うインタフェースである。 Figure 2 is a block diagram showing the configuration of a power control device 30 according to one embodiment of the present invention. The power control device 30 includes a communication interface (I/F) 31, a storage device 32, and a computing device 33. The communication I/F 31 is an interface that transmits and receives signals between the power control device 30 and other devices.

記憶装置３２は、演算装置３３が実行する制御プログラム、演算装置３３が処理する種々の情報が保存される記憶装置である。 The storage device 32 is a storage device that stores the control program executed by the computing device 33 and various information processed by the computing device 33.

演算装置３３は、ＣＰＵ（Central Processing Unit）やＭＰＵ（Micro Processing Unit）等の演算装置である。演算装置３３は、記憶装置３２に保存された制御プログラムを実行することにより、制御プログラムによって規定される制御方法を実行する。制御プログラムには、制御情報取得部３００及び電力制御部３０１が含まれる。なお、ＦＰＧＡ（Field-Programmable Gate Array）やＡＳＩＣ（Application Specific Integrated Circuit）等の集積回路が、制御プログラムを実行してもよい。 The arithmetic device 33 is an arithmetic device such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The arithmetic device 33 executes a control method defined by a control program stored in the storage device 32 by executing the control program. The control program includes a control information acquisition unit 300 and a power control unit 301. Note that an integrated circuit such as an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit) may execute the control program.

制御情報取得部３００は、電力制御部３０１が使用する制御情報を取得するプログラムである。制御情報には、（１）二次電池システム１の電力供給先において予測される天候を示す予測天候情報、（２）二次電池システム１の電力供給先の日時毎の電力需要を示す電力需要情報、（３）売電価格を示す売電情報、（４）容量型電池１０の温度及び出力型電池２０の温度を示す温度情報、（５）容量型電池１０の蓄電量を示す第１の蓄電量情報及び二次電池システム１に入力される電力を示す入力電力情報、（６）容量型電池１０内の塩濃度を示す塩濃度情報、並びに（７）出力型電池２０の蓄電量を示す第２の蓄電量情報のうちの少なくとも１つが含まれる。 The control information acquisition unit 300 is a program that acquires control information used by the power control unit 301. The control information includes at least one of the following: (1) forecast weather information indicating the forecasted weather at the power supply destination of the secondary battery system 1; (2) power demand information indicating the power demand for each date and time at the power supply destination of the secondary battery system 1; (3) power selling information indicating the power selling price; (4) temperature information indicating the temperature of the capacity type battery 10 and the temperature of the output type battery 20; (5) first power storage amount information indicating the amount of power stored in the capacity type battery 10 and input power information indicating the power input to the secondary battery system 1; (6) salt concentration information indicating the salt concentration in the capacity type battery 10; and (7) second power storage amount information indicating the amount of power stored in the output type battery 20.

電力制御部３０１は、種々の制御情報に基づき、容量型電池１０及び出力型電池２０の入力電力を制御するプログラムである。具体的には、電力制御部３０１は、予測天候情報が降雨を示す場合、容量型電池１０の入力電力を制限すると共に、出力型電池２０の入力電力を増やすことができる。 The power control unit 301 is a program that controls the input power of the capacity type battery 10 and the output type battery 20 based on various control information. Specifically, when the forecast weather information indicates rainfall, the power control unit 301 can limit the input power of the capacity type battery 10 and increase the input power of the output type battery 20.

また、電力制御部３０１は、電力需要情報に基づき、二次電池システム１の電力供給先における消費電力が少ない時に、容量型電池１０の入力電力を増やすことができる。 In addition, based on the power demand information, the power control unit 301 can increase the input power of the capacity type battery 10 when the power consumption at the power supply destination of the secondary battery system 1 is low.

さらに、電力制御部３０１は、売電情報が既定の売電価格以上である場合、容量型電池１０の入力電力を制限すると共に、出力型電池２０の入力電力を増やすことができる。既定の売電価格は、出力型電池２０の入力電力を増加させた結果、出力型電池２０の寿命が縮まることによる長期的な交換費用の増大と見合う価格以上とすることができる。 Furthermore, when the power selling information is equal to or higher than a default power selling price, the power control unit 301 can limit the input power of the capacity type battery 10 and increase the input power of the output type battery 20. The default power selling price can be set to a price equal to or higher than the price that is commensurate with the increase in the long-term replacement costs due to the shortened lifespan of the output type battery 20 as a result of increasing the input power of the output type battery 20.

さらに、電力制御部３０１は、温度情報に基づき、温度の高い二次電池の入力電力を減らし、温度の低い二次電池の入力電力を増やすことができる。具体的には、容量型電池１０の温度が出力型電池２０の温度よりも高い場合、電力制御部３０１は、容量型電池１０の入力電力を減らし、出力型電池２０の入力電力を増やす。一方、出力型電池２０の温度が容量型電池１０の温度よりも高い場合、電力制御部３０１は、出力型電池２０の入力電力を減らし、容量型電池１０の入力電力を増やす。 Furthermore, based on the temperature information, the power control unit 301 can reduce the input power of the secondary battery with a higher temperature and increase the input power of the secondary battery with a lower temperature. Specifically, when the temperature of the capacity battery 10 is higher than the temperature of the output type battery 20, the power control unit 301 reduces the input power of the capacity battery 10 and increases the input power of the output type battery 20. On the other hand, when the temperature of the output type battery 20 is higher than the temperature of the capacity battery 10, the power control unit 301 reduces the input power of the output type battery 20 and increases the input power of the capacity battery 10.

さらに、電力制御部３０１は、第１の蓄電量情報が示す容量型電池１０の蓄電量が既定の第１の蓄電量を超える場合において、入力電力情報が示す電力が既定の電力を超えるとき、容量型電池１０の入力電力を制限すると共に、出力型電池２０の入力電力を増やすことができる。既定の第１の蓄電量及び既定の電力は、容量型電池１０がインターカレータ（リチウムイオン等）を含む二次電池である場合において、容量型電池１０内のインターカレータの析出が生じ得る蓄電量及び電力値とすることができる。したがって、容量型電池１０の蓄電量が容量型電池１０内のインターカレータの析出が生じ得る蓄電量を超え、かつ、二次電池システム１に入力される電力が析出の生じ得る電力値を超えた場合、電力制御部３０１は、容量型電池１０の入力電力を制限すると共に、出力型電池２０の入力電力を増やす。 Furthermore, when the amount of stored power of the capacity battery 10 indicated by the first stored power amount information exceeds the first predetermined amount of stored power, the power control unit 301 can limit the input power of the capacity battery 10 and increase the input power of the output battery 20 when the power indicated by the input power information exceeds the predetermined power. The predetermined first stored power amount and the predetermined power can be the amount of stored power and the power value at which precipitation of the intercalator in the capacity battery 10 may occur when the capacity battery 10 is a secondary battery including an intercalator (lithium ion, etc.). Therefore, when the amount of stored power of the capacity battery 10 exceeds the amount of stored power at which precipitation of the intercalator in the capacity battery 10 may occur and the power input to the secondary battery system 1 exceeds the power value at which precipitation may occur, the power control unit 301 limits the input power of the capacity battery 10 and increases the input power of the output battery 20.

さらに、電力制御部３０１は、塩濃度情報に基づき、容量型電池１０内の塩濃度斑の発生の予兆があると判定した場合、容量型電池１０の入力電力を制限すると共に、出力型電池２０の入力電力を増やすことができる。 Furthermore, if the power control unit 301 determines based on the salt concentration information that there are signs of salt concentration unevenness occurring in the capacity battery 10, it can limit the input power of the capacity battery 10 and increase the input power of the output battery 20.

例えば、電力制御部３０１は、容量型電池１０の連続充放電時の負極の膨張収縮による電解液の押出量の増加を検出することにより、塩濃度斑の発生の予兆を捉えることができる。また、電力制御部３０１は、容量型電池１０の面方向のＬｉ塩の偏りを検出することにより、塩濃度斑の発生の予兆を捉えることができる。面方向とは、容量型電池１０の正極集電部及び負極集電部を結ぶ方向である。さらに、電力制御部３０１は、容量型電池１０の容量の維持率の低下を検出することにより、塩濃度斑の発生の予兆を捉えることができる。さらに、容量型電池１０の抵抗値の上昇傾向を検出することにより、塩濃度斑の発生の予兆を捉えることができる。さらに、容量型電池１０の温度の上昇による電解液の膨張を検出することにより、塩濃度の斑が発生する予兆を捉えることができる。 For example, the power control unit 301 can detect the occurrence of salt concentration spots by detecting an increase in the amount of electrolyte extrusion due to the expansion and contraction of the negative electrode during continuous charging and discharging of the capacitive battery 10. The power control unit 301 can also detect the occurrence of salt concentration spots by detecting the bias of Li salt in the surface direction of the capacitive battery 10. The surface direction is the direction connecting the positive electrode current collector and the negative electrode current collector of the capacitive battery 10. Furthermore, the power control unit 301 can detect the occurrence of salt concentration spots by detecting a decrease in the capacity maintenance rate of the capacitive battery 10. Furthermore, the power control unit 301 can detect the occurrence of salt concentration spots by detecting an upward trend in the resistance value of the capacitive battery 10. Furthermore, the occurrence of salt concentration spots can be detected by detecting the expansion of the electrolyte due to an increase in the temperature of the capacitive battery 10.

さらに、電力制御部３０１は、出力型電池２０の蓄電量を示す第２の蓄電量情報に基づいて、容量型電池１０及び出力型電池２０の入力電力を制御することができる。具体的には、電力制御部３０１は、出力型電池２０への電力供給を優先的に行い、第２の蓄電量情報が示す出力型電池２０の蓄電量が既定の第２の蓄電量を超える場合、出力型電池２０の入力電力を制限すると共に、容量型電池１０の入力電力を増やすことができる。第２の蓄電量は、出力型電池２０の最大容量以下とすることができる。また、第２の蓄電量情報が示す出力型電池２０の蓄電量が既定の第３の蓄電量以下となった場合、出力型電池２０の入力電力を増やすと共に、容量型電池１０の入力電力を制限することができる。第３の蓄電量は、第２の蓄電量未満とすることができる。 Furthermore, the power control unit 301 can control the input power of the capacity battery 10 and the output type battery 20 based on the second storage amount information indicating the storage amount of the output type battery 20. Specifically, the power control unit 301 prioritizes power supply to the output type battery 20, and when the storage amount of the output type battery 20 indicated by the second storage amount information exceeds a predetermined second storage amount, the power control unit 301 can limit the input power of the output type battery 20 and increase the input power of the capacity battery 10. The second storage amount can be equal to or less than the maximum capacity of the output type battery 20. Furthermore, when the storage amount of the output type battery 20 indicated by the second storage amount information becomes equal to or less than a predetermined third storage amount, the power control unit 301 can increase the input power of the output type battery 20 and limit the input power of the capacity battery 10. The third storage amount can be less than the second storage amount.

図３は、二次電池システム１が必要とされる電力（ＤＰ）と、容量型電池１０の入力電力（ＣＰ）と、出力型電池２０の入力電力（ＯＰ）との関係を示す図である。二次電池システム１には、必要電力（ＤＰ）以上の電力が供給され、容量型電池１０及び出力型電池２０に蓄電される。 Figure 3 shows the relationship between the power (DP) required by the secondary battery system 1, the input power (CP) of the capacity battery 10, and the input power (OP) of the output battery 20. The secondary battery system 1 is supplied with power equal to or greater than the required power (DP), and the power is stored in the capacity battery 10 and the output battery 20.

まず、出力型電池２０への電力供給が優先的に行われ、出力型電池２０の入力電力（ＯＰ）が増加し、出力型電池２０の蓄電量が増加する。出力型電池２０の蓄電量が第２の蓄電量を超えると、電力制御部３０１が、出力型電池２０の入力電力（ＯＰ）を制限すると共に、容量型電池１０の入力電力（ＣＰ）を増やす。その結果、出力型電池２０の蓄電量が減少すると共に、容量型電池１０の蓄電量が増加する。 First, power is supplied to the output type battery 20 with priority, the input power (OP) of the output type battery 20 increases, and the amount of stored power in the output type battery 20 increases. When the amount of stored power in the output type battery 20 exceeds the second amount of stored power, the power control unit 301 limits the input power (OP) of the output type battery 20 and increases the input power (CP) of the capacity type battery 10. As a result, the amount of stored power in the output type battery 20 decreases and the amount of stored power in the capacity type battery 10 increases.

出力型電池２０の蓄電量が第３の蓄電量以下になると、電力制御部３０１は、容量型電池１０の入力電力（ＣＰ）を制限すると共に、出力型電池２０の入力電力（ＯＰ）を増やす。その結果、容量型電池１０の蓄電量が減少すると共に、出力型電池２０の蓄電量が増加する。このように、電力制御部３０１は、出力型電池２０の蓄電量に基づいて、容量型電池１０及び出力型電池２０の入力電力を制御することができる。 When the amount of stored power in the output-type battery 20 falls below the third amount of stored power, the power control unit 301 limits the input power (CP) of the capacity-type battery 10 and increases the input power (OP) of the output-type battery 20. As a result, the amount of stored power in the capacity-type battery 10 decreases and the amount of stored power in the output-type battery 20 increases. In this way, the power control unit 301 can control the input power of the capacity-type battery 10 and the output-type battery 20 based on the amount of stored power in the output-type battery 20.

上述した実施形態では、二次電池システム１は、第１の二次電池１０と、第１の二次電池よりも単位時間当たりの充放電性能が高い第２の二次電池２０と、電力制御装置３０とを含む。電力制御装置３０は、制御情報に基づき、第１の二次電池１０及び第２の二次電池２０の入力電力を制御する。制御情報には、電力供給先において予測される天候を示す予測天候情報、電力供給先の日時毎の電力需要を示す電力需要情報、売電価格を示す売電情報、第１の二次電池１０の温度及び第２の二次電池２０の温度を示す温度情報、二次電池システム１に入力される電力を示す入力電力情報、第１の二次電池１０内の塩濃度を示す塩濃度情報、並びに第２の二次電池２０の蓄電量を示す第２の蓄電量情報のうちの少なくとも１つが含まれる。 In the above-described embodiment, the secondary battery system 1 includes a first secondary battery 10, a second secondary battery 20 having a higher charge/discharge performance per unit time than the first secondary battery, and a power control device 30. The power control device 30 controls the input power of the first secondary battery 10 and the second secondary battery 20 based on control information. The control information includes at least one of forecast weather information indicating the weather predicted at the power supply destination, power demand information indicating the power demand for each date and time at the power supply destination, power selling information indicating the power selling price, temperature information indicating the temperature of the first secondary battery 10 and the temperature of the second secondary battery 20, input power information indicating the power input to the secondary battery system 1, salt concentration information indicating the salt concentration in the first secondary battery 10, and second stored power amount information indicating the stored power amount of the second secondary battery 20.

電力制御装置３０は、予測天候情報が降雨を示す場合、第１の二次電池１０の入力電力を制限すると共に、第２の二次電池２０の入力電力を増やす。降雨の場合、電力供給先における電力消費量が増加する可能性がある。そのため、充放電性能が高い第２の二次電池２０の蓄電量を事前に増やすことにより、電力供給先における電力消費量の増加に速やかに対応することができる。 When the forecast weather information indicates rainfall, the power control device 30 limits the input power of the first secondary battery 10 and increases the input power of the second secondary battery 20. When it rains, there is a possibility that the amount of power consumption at the power supply destination will increase. Therefore, by increasing the amount of stored power in advance in the second secondary battery 20, which has high charging and discharging performance, it is possible to quickly respond to the increase in power consumption at the power supply destination.

また、電力制御装置３０は、電力需要情報に基づき、電力供給先における消費電力が少ない時に、第２の二次電池２０よりも蓄電容量が大きい第１の二次電池１０の入力電力を増やす。例えば、電力供給先における消費電力が少ない夜間等に第１の二次電池１０の入力電力を増やす。これにより、二次電池システム１において、多くの電力を効率的に蓄電することができる。 Furthermore, based on the power demand information, the power control device 30 increases the input power of the first secondary battery 10, which has a larger storage capacity than the second secondary battery 20, when the power consumption at the power supply destination is low. For example, the input power of the first secondary battery 10 is increased at night, etc., when the power consumption at the power supply destination is low. This allows a large amount of power to be stored efficiently in the secondary battery system 1.

さらに、電力制御装置３０は、売電情報が既定の売電価格以上である場合、第１の二次電池１０の入力電力を制限すると共に、第２の二次電池２０の入力電力を増やす。これにより、充放電性能が高い第２の二次電池２０から出力される電力量を増やすことができ、売電収入を高めることができる。例えば、売電価格が、出力電力量の増加に伴う第２の二次電池２０の寿命の短縮による長期的な交換費用の増大と見合う価格以上となった場合、第２の二次電池２０の出力電力量を増やして売電収入を高めることにより、収益性を高めることができる。 Furthermore, when the power selling information is equal to or higher than a default power selling price, the power control device 30 limits the input power of the first secondary battery 10 and increases the input power of the second secondary battery 20. This makes it possible to increase the amount of power output from the second secondary battery 20, which has high charging and discharging performance, and to increase the income from the power selling. For example, when the power selling price becomes equal to or higher than the price that is commensurate with the increase in the long-term replacement costs due to the shortened lifespan of the second secondary battery 20 caused by the increase in the amount of output power, the amount of output power of the second secondary battery 20 is increased to increase the income from the power selling, thereby improving profitability.

さらに、電力制御装置３０は、温度情報に基づき、温度の高い二次電池の入力電力を減らし、温度の低い二次電池の入力電力を増やす。これにより、温度の高い二次電池の温度を低下させることができ、当該二次電池の劣化を抑制することができる。 Furthermore, based on the temperature information, the power control device 30 reduces the input power of the secondary battery with a higher temperature and increases the input power of the secondary battery with a lower temperature. This makes it possible to lower the temperature of the secondary battery with a higher temperature and suppress deterioration of the secondary battery.

さらに、電力制御装置３０は、第１の蓄電量情報が示す第１の二次電池１０の蓄電量が既定の第１の蓄電量を超え、かつ、入力電力情報が示す電力が既定の電力を超えた場合、第１の二次電池１０の入力電力を制限すると共に、第２の二次電池２０の入力電力を増やす。既定の第１の蓄電量及び既定の電力は、容量型電池１０がインターカレータを含む二次電池である場合において、容量型電池１０内のインターカレータの析出が生じ得る蓄電量及び電力値とすることができる。これにより、インターカレータを含む第１の二次電池１０の蓄電量が、インターカレータの析出が生じ得る蓄電量を超え、かつ、二次電池システム１に入力される電力が、インターカレータの析出の生じ得る電力値を超えた場合、電力制御部３０１は、第１の二次電池１０の入力電力を制限する。その結果、第１の二次電池１０内でインターカレータが析出するのを抑制できる。 Furthermore, when the amount of charge stored in the first secondary battery 10 indicated by the first stored amount information exceeds the default first amount of charge stored, and the power indicated by the input power information exceeds the default power, the power control device 30 limits the input power of the first secondary battery 10 and increases the input power of the second secondary battery 20. The default first amount of charge stored and the default power can be the amount of charge stored and the power value at which precipitation of the intercalator in the capacity type battery 10 may occur when the capacity type battery 10 is a secondary battery including an intercalator. As a result, when the amount of charge stored in the first secondary battery 10 including the intercalator exceeds the amount of charge at which precipitation of the intercalator may occur, and the power input to the secondary battery system 1 exceeds the power value at which precipitation of the intercalator may occur, the power control unit 301 limits the input power of the first secondary battery 10. As a result, precipitation of the intercalator in the first secondary battery 10 can be suppressed.

さらに、電力制御装置３０は、塩濃度情報に基づき、第１の二次電池１０内の塩濃度の斑が発生する予兆があると判定した場合、第１の二次電池１０の入力電力を制限すると共に、第２の二次電池２０の入力電力を増やす。これにより、第１の二次電池１０内の塩濃度の斑が発生する前に、第１の二次電池１０内の塩濃度の斑を解消することができる。 Furthermore, when the power control device 30 determines based on the salt concentration information that there is a sign of unevenness in the salt concentration in the first secondary battery 10, it limits the input power of the first secondary battery 10 and increases the input power of the second secondary battery 20. This makes it possible to eliminate unevenness in the salt concentration in the first secondary battery 10 before it occurs.

さらに、電力制御装置３０は、第２の二次電池２０への電力供給を優先的に行うことができる。電力制御部３０１は、第２の蓄電量情報が示す第２の二次電池２０の蓄電量が既定の第２の蓄電量を超える場合、第２の二次電池２０の入力電力を制限すると共に、第１の二次電池１０の入力電力を増やすことができる。第２の蓄電量は、第２の二次電池２０の最大容量以下の値、例えば、最大容量の８０％とすることができる。これにより、充放電性能が高い第２の二次電池２０を効率的に活用することができる。また、第２の蓄電量を最大容量の８０％とすることにより、第２の二次電池２０の寿命を長くすることができる。 Furthermore, the power control device 30 can give priority to supplying power to the second secondary battery 20. When the stored power amount of the second secondary battery 20 indicated by the second stored power amount information exceeds a predetermined second stored power amount, the power control unit 301 can limit the input power of the second secondary battery 20 and increase the input power of the first secondary battery 10. The second stored power amount can be set to a value equal to or less than the maximum capacity of the second secondary battery 20, for example, 80% of the maximum capacity. This allows the second secondary battery 20, which has high charging and discharging performance, to be efficiently utilized. Furthermore, by setting the second stored power amount to 80% of the maximum capacity, the life of the second secondary battery 20 can be extended.

さらに、電力制御装置３０は、第２の蓄電量情報が示す第２の二次電池２０の蓄電量が既定の第３の蓄電量以下となった場合、第１の二次電池１０の入力電力を制限すると共に、第２の二次電池２０の入力電力を増やすことができる。第３の蓄電量は、第２の蓄電量未満の値、例えば、最大容量の５０％とすることができる。これにより、第２の二次電池２０の蓄電量が、最大容量の５０％になると、再び、充放電性能が高い第２の二次電池２０の入力電力が増加するため、第２の二次電池２０を効率的に活用することができる。 Furthermore, when the amount of stored power of the second secondary battery 20 indicated by the second stored power information becomes equal to or less than a predetermined third amount of stored power, the power control device 30 can limit the input power of the first secondary battery 10 and increase the input power of the second secondary battery 20. The third amount of stored power can be set to a value less than the second amount of stored power, for example, 50% of the maximum capacity. As a result, when the amount of stored power of the second secondary battery 20 becomes 50% of the maximum capacity, the input power of the second secondary battery 20, which has high charging and discharging performance, increases again, and the second secondary battery 20 can be efficiently utilized.

複数の容量型電池１０及び出力型電池２０を含む二次電池システム１において、電力制御装置３０が上述の制御を行い、容量型電池１０及び出力型電池２０の使用状況を分析することにより、容量型電池１０及び出力型電池２０の最適数を把握することができる。そのため、二次電池システム１において最適な数の容量型電池１０及び出力型電池２０を設置することにより、二次電池システム１の費用を低減することができる。 In a secondary battery system 1 including a plurality of capacity type batteries 10 and output type batteries 20, the power control device 30 performs the above-mentioned control and analyzes the usage status of the capacity type batteries 10 and output type batteries 20, thereby making it possible to ascertain the optimal number of capacity type batteries 10 and output type batteries 20. Therefore, by installing an optimal number of capacity type batteries 10 and output type batteries 20 in the secondary battery system 1, the cost of the secondary battery system 1 can be reduced.

図４は、容量型電池１０及び出力型電池２０の容量及び出力を示す図である。仮に、二次電池システム１を容量型電池１０のみで構成する場合、容量型電池１０の単位時間当たりの出力性能は出力型電池２０よりも低いため、二次電池システム１が必要とされる出力を実現するためには、より多くの容量型電池１０を用意する必要がある。一方、二次電池システム１を出力型電池２０のみで構成する場合、出力型電池２０の容量は容量型電池１０よりも小さいため、二次電池システム１が必要とされる容量を実現するためには、より多くの出力型電池２０を用意する必要がある。 Figure 4 is a diagram showing the capacity and output of the capacity type battery 10 and the output type battery 20. If the secondary battery system 1 were to be constructed only with capacity type batteries 10, the output performance per unit time of the capacity type batteries 10 would be lower than that of the output type batteries 20, and therefore more capacity type batteries 10 would need to be prepared in order for the secondary battery system 1 to achieve the required output. On the other hand, if the secondary battery system 1 were to be constructed only with output type batteries 20, the capacity of the output type batteries 20 would be smaller than that of the capacity type batteries 10, and therefore more output type batteries 20 would need to be prepared in order for the secondary battery system 1 to achieve the required capacity.

本発明の一実施形態に係る二次電池システム１は、単位時間当たりの出力性能が容量型電池１０よりも高い出力型電池２０を含むため、二次電池システム１が必要とされる出力を実現するために必要な容量型電池１０の数を減らすことができる。また、二次電池システム１は、出力型電池２０よりも容量が大きい容量型電池１０を含むため、二次電池システム１が必要とされる容量を実現するために必要な出力型電池２０の数を減らすことができる。 The secondary battery system 1 according to one embodiment of the present invention includes an output-type battery 20 having a higher output performance per unit time than the capacity-type battery 10, so that the number of capacity-type batteries 10 required for the secondary battery system 1 to achieve the required output can be reduced. In addition, the secondary battery system 1 includes a capacity-type battery 10 having a larger capacity than the output-type battery 20, so that the number of output-type batteries 20 required for the secondary battery system 1 to achieve the required capacity can be reduced.

電力制御装置３０は、上述した制御情報の全てを使用して、容量型電池１０及び出力型電池２０の入力電力を制御することができる。複数の制御情報に基づく容量型電池１０及び出力型電池２０の制御が競合する場合、電力制御装置３０は、制御情報の既定の優先順位に従って、容量型電池１０及び出力型電池２０の入力電力を制御できる。制御情報の優先順位は任意に設定することができる。 The power control device 30 can use all of the above-mentioned control information to control the input power of the capacity type battery 10 and the output type battery 20. When control of the capacity type battery 10 and the output type battery 20 based on multiple control information conflicts, the power control device 30 can control the input power of the capacity type battery 10 and the output type battery 20 according to the default priority order of the control information. The priority order of the control information can be set arbitrarily.

例えば、電力制御装置３０は、電力需要情報に基づき、二次電池システム１の電力供給先における消費電力が少ない時に容量型電池１０の入力電力を増やすことができる一方、塩濃度情報に基づき、容量型電池１０内の塩濃度斑の発生の予兆があると判定した場合、容量型電池１０の入力電力を制限すると共に出力型電池２０の入力電力を増やすことができる。この場合、例えば、塩濃度情報の優先順位を電力需要情報よりも高く設定することができる。これにより、電力制御装置３０は、二次電池システム１の電力供給先における消費電力が少ない時であっても、容量型電池１０内の塩濃度斑の発生の予兆があると判定した場合には、容量型電池１０の入力電力を制限すると共に出力型電池２０の入力電力を増やすことができる。そのため、容量型電池１０内の塩濃度斑の発生を事前に防止することができる。 For example, the power control device 30 can increase the input power of the capacitive battery 10 when the power consumption at the power supply destination of the secondary battery system 1 is low based on the power demand information, while when it is determined that there are signs of salt concentration unevenness in the capacitive battery 10 based on the salt concentration information, it can limit the input power of the capacitive battery 10 and increase the input power of the output battery 20. In this case, for example, the priority of the salt concentration information can be set higher than the power demand information. As a result, even when the power consumption at the power supply destination of the secondary battery system 1 is low, if it is determined that there are signs of salt concentration unevenness in the capacitive battery 10, it can limit the input power of the capacitive battery 10 and increase the input power of the output battery 20. Therefore, it is possible to prevent the occurrence of salt concentration unevenness in the capacitive battery 10 in advance.

さらに、電力分割装置４０は、入力電力の低周波成分を第１の二次電池１０に入力し、入力電力の高周波成分を第２の二次電池２０に入力する。電力制御装置３０は、二次電池システム１に入力される電力の周波数を調整することにより、第１の二次電池１０及び第２の二次電池２０に供給される電力量を調整することができる。これにより、二次電池システム１の入力電力の周波数を調整することにより、第１の二次電池１０及び第２の二次電池２０の蓄電量を調整することができる。また、充放電性能が高い第２の二次電池２０に、劣化の少ない高周波電力を供給することができる。 Furthermore, the power dividing device 40 inputs the low-frequency components of the input power to the first secondary battery 10 and inputs the high-frequency components of the input power to the second secondary battery 20. The power control device 30 can adjust the amount of power supplied to the first secondary battery 10 and the second secondary battery 20 by adjusting the frequency of the power input to the secondary battery system 1. This makes it possible to adjust the amount of stored power in the first secondary battery 10 and the second secondary battery 20 by adjusting the frequency of the input power to the secondary battery system 1. In addition, high-frequency power with little degradation can be supplied to the second secondary battery 20, which has high charging and discharging performance.

上述の例において、プログラムは、コンピュータに読み込まれた場合に、実施形態で説明された１又はそれ以上の機能をコンピュータに行わせるための命令群（又はソフトウェアコード）を含む。プログラムは、非一時的なコンピュータ可読媒体又は実体のある記憶媒体に格納されてもよい。限定ではなく例として、コンピュータ可読媒体又は実体のある記憶媒体は、random-access memory（RAM）、read-only memory（ROM）、フラッシュメモリ、solid-state drive（SSD）又はその他のメモリ技術、CD-ROM、digital versatile disk（DVD）、Blu-ray（登録商標）ディスク又はその他の光ディスクストレージ、磁気カセット、磁気テープ、磁気ディスクストレージ又はその他の磁気ストレージデバイスを含む。プログラムは、一時的なコンピュータ可読媒体又は通信媒体上で送信されてもよい。限定ではなく例として、一時的なコンピュータ可読媒体又は通信媒体は、電気的、光学的、音響的、又はその他の形式の伝搬信号を含む。コンピュータには、ＰＣ（Personal Computer）、サーバ、ＣＰＵ、ＭＰＵ、ＦＰＧＡ、ＡＳＩＣ等の種々の装置が含まれる。 In the above example, the program includes instructions (or software code) that, when loaded into a computer, cause the computer to perform one or more functions described in the embodiment. The program may be stored in a non-transitory computer-readable medium or a tangible storage medium. By way of example and not limitation, the computer-readable medium or tangible storage medium includes random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drive (SSD) or other memory technology, CD-ROM, digital versatile disk (DVD), Blu-ray (registered trademark) disk or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage device. The program may be transmitted on a temporary computer-readable medium or communication medium. By way of example and not limitation, the temporary computer-readable medium or communication medium includes electrical, optical, acoustic, or other forms of propagated signals. The computer includes various devices such as a PC (Personal Computer), a server, a CPU, an MPU, an FPGA, an ASIC, etc.

本発明は上述した実施形態に限られたものではなく、本発明の趣旨を逸脱しない範囲で適宜変更することが可能である。 The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.

１二次電池システム
１０容量型電池、第１の二次電池
２０出力型電池、第２の二次電池
３０電力制御装置
３２記憶装置
３３演算装置
３００制御情報取得部
３０１電力制御部
４０電力分割装置
ＤＰ二次電池システムの必要電力
ＣＰ容量型電池の入力電力
ＯＰ出力型電池の入力電力 Reference Signs List 1 Secondary battery system 10 Capacity type battery, first secondary battery 20 Output type battery, second secondary battery 30 Power control device 32 Storage device 33 Arithmetic device 300 Control information acquisition unit 301 Power control unit 40 Power division device DP Required power CP of secondary battery system Input power OP of capacity type battery Input power of output type battery

Claims

A first secondary battery;
a second secondary battery having a higher charge/discharge performance per unit time than the first secondary battery;
a power control device that controls input power of the first secondary battery and the second secondary battery based on control information;
the control information includes forecasted weather information indicating weather forecasted at a power supply destination, power demand information indicating power demand at each date and time at the power supply destination, power selling information indicating a power selling price, and salt concentration information indicating a salt concentration in the first secondary battery;
When the control of the first secondary battery and the control of the second secondary battery based on the control information conflicts, the power control device controls the input power of the first secondary battery and the second secondary battery according to a default priority order of the control information.
Secondary battery system.

The secondary battery system of claim 1, wherein the power control device limits the input power of the first secondary battery and increases the input power of the second secondary battery when the forecast weather information indicates rainfall.

the first secondary battery has a larger power storage capacity than the second secondary battery;
3 . The secondary battery system according to claim 1 , wherein the power control device increases the input power to the first secondary battery when power consumption at the power supply destination is low based on the power demand information.

The secondary battery system according to any one of claims 1 to 3, wherein the power control device limits the input power to the first secondary battery and increases the input power to the second secondary battery when the power selling information is equal to or higher than a default power selling price.

The secondary battery system according to any one of claims 1 to 4, wherein the power control device, when determining based on the salt concentration information that there is a sign of unevenness in the salt concentration in the first secondary battery, limits the input power to the first secondary battery and increases the input power to the second secondary battery.

a power division device that divides an input power and supplies the divided power to the first secondary battery and the second secondary battery;
the power dividing device inputs a low-frequency component of the input power to the first secondary battery and inputs a high-frequency component of the input power to the second secondary battery;
The secondary battery system according to any one of claims 1 to 5, wherein the power control device adjusts the amount of power supplied to the first secondary battery and the second secondary battery by adjusting the amount of power output by the power division device.

A control method for controlling power of a secondary battery system, comprising:
the secondary battery system includes a first secondary battery and a second secondary battery having a higher charge/discharge performance per unit time than the first secondary battery;
a computer controls input power of the first secondary battery and the second secondary battery based on control information;
the control information includes forecasted weather information indicating weather forecasted at a power supply destination, power demand information indicating power demand at each date and time at the power supply destination, power selling information indicating a power selling price, and salt concentration information indicating a salt concentration in the first secondary battery;
When a conflict occurs between controls of the first secondary battery and the second secondary battery based on the control information, the computer controls the input power of the first secondary battery and the second secondary battery according to a default priority order of the control information.
Control methods.

A control program for controlling power of a secondary battery system,
the secondary battery system includes a first secondary battery and a second secondary battery having a higher charge/discharge performance per unit time than the first secondary battery;
causing a computer to control input power of the first secondary battery and the second secondary battery based on the control information;
the control information includes forecasted weather information indicating weather forecasted at a power supply destination, power demand information indicating power demand at each date and time at the power supply destination, power selling information indicating a power selling price, and salt concentration information indicating a salt concentration in the first secondary battery;
the control of the input power of the first secondary battery and the second secondary battery includes, when a conflict occurs between controls of the first secondary battery and the second secondary battery based on the control information, controlling the input power of the first secondary battery and the second secondary battery by the computer in accordance with a default priority order of the control information;
Control program.