JP2018013435A - Power storage system - Google Patents

Power storage system Download PDF

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JP2018013435A
JP2018013435A JP2016143899A JP2016143899A JP2018013435A JP 2018013435 A JP2018013435 A JP 2018013435A JP 2016143899 A JP2016143899 A JP 2016143899A JP 2016143899 A JP2016143899 A JP 2016143899A JP 2018013435 A JP2018013435 A JP 2018013435A
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charging
charge capacity
storage battery
full charge
capacity estimation
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皓子 安谷屋
Hiroko Ataya
皓子 安谷屋
順一 波多野
Junichi Hatano
順一 波多野
祐希 村松
Yuki Muramatsu
祐希 村松
隆広 都竹
Takahiro Tsutake
隆広 都竹
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Toyota Industries Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E60/10Energy storage using batteries

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Abstract

PROBLEM TO BE SOLVED: To provide a power storage system for improving the estimation accuracy of full charge capacity without reducing the user convenience.SOLUTION: A power storage system 1 includes battery 3 and a control unit 9. In a time zone having a high frequency of use of the battery 3, the control unit determines the execution of full charge capacity estimation of the battery 3, when the lapsed time from the previous full charge capacity estimation or the integrated full discharge amount of the battery 3 from the previous full charge capacity estimation exceeds a first threshold. In a time zone having a low frequency of use of the battery 3, the control unit determines the execution of full charge capacity estimation, when the lapsed time or the integrated full discharge amount exceeds a second threshold lower than the first threshold.SELECTED DRAWING: Figure 1

Description

本発明は、蓄電システムに関する。   The present invention relates to a power storage system.

充電器には、系統電源から供給された電力を基に所望の電力を生成する電力変換部と、電力変換部により生成された電力を蓄電する蓄電池とを備えた充電器がある。こうした充電器は、例えば、系統電源から供給される電力が契約電力を超えないように、電力変換部から出力された電力と蓄電池から出力された電力とを使用して、充電器に接続された充電対象の蓄電池を充電する。以下の説明において、充電器に備えられる蓄電池を充電用蓄電池と呼び、充電器に接続されて充電される蓄電池を充電対象蓄電池と呼ぶ場合がある。   There exists a charger provided with the power converter which produces | generates desired electric power based on the electric power supplied from the system power supply, and the storage battery which stores the electric power produced | generated by the power converter. Such a charger is connected to the charger using, for example, the power output from the power conversion unit and the power output from the storage battery so that the power supplied from the system power supply does not exceed the contract power. Charge the storage battery to be charged. In the following description, a storage battery provided in the charger may be referred to as a charging storage battery, and a storage battery connected to the charger and charged may be referred to as a charging target storage battery.

蓄電池の満充電容量は、蓄電池の経年劣化に伴い低下するため、蓄電池の満充電容量は蓄電池の設置後において推定されることが望ましい。蓄電池の満充電容量は、例えば、次の式(1)のように、充電中に蓄電池に流れた電流を積算した値(積算電流量)を用いて推定される。   Since the full charge capacity of the storage battery decreases as the storage battery deteriorates over time, it is desirable that the full charge capacity of the storage battery be estimated after the storage battery is installed. The full charge capacity of the storage battery is estimated using, for example, a value (integrated current amount) obtained by integrating the current flowing through the storage battery during charging as in the following equation (1).

満充電容量=充電による積算電流量[Ah]/(充電終了後の充電率[%]−(充電開始前の充電率[%])) ・・・式(1)
式(1)のように積算電流量を用いて蓄電池の満充電容量を推定する方法では、蓄電池に流れる電流を計測する電流センサの計測誤差の影響を受ける。そこで、電流センサの計測誤差の影響を小さくするために、充電開始時の蓄電池の充電率(State Of Charge(SOC))をできる限り少なくし、蓄電池が満充電されるまでの積算電流量を大きくすることが考えられる。
Fully charged capacity = Amount of accumulated current [Ah] / (Charging rate after charging is completed [%] − (Charging rate before starting charging [%])) (1)
In the method of estimating the full charge capacity of the storage battery using the accumulated current amount as shown in the equation (1), it is affected by the measurement error of the current sensor that measures the current flowing through the storage battery. Therefore, in order to reduce the influence of the measurement error of the current sensor, the charging rate (State Of Charge (SOC)) of the storage battery at the start of charging is reduced as much as possible, and the integrated current amount until the storage battery is fully charged is increased. It is possible to do.

なお、関連する技術として、特許文献1に記載の技術が知られている。   As a related technique, a technique described in Patent Document 1 is known.

特開2015−40832号公報Japanese Patent Laying-Open No. 2015-40832

しかしながら、満充電容量推定の実施に備えて充電用蓄電池の充電率を無計画に少なくすると、充電対象蓄電池が充電器に接続された場合に、充電用蓄電池からの出力電力によって充電対象蓄電池を充電することが難しくなる。電力変換部が生成及び出力できる電力は、系統電源から受給可能な契約電力に従うため、充電用蓄電池から十分な電力が出力されない場合には、充電対象蓄電池を速やかに充電できなくなり、ユーザの利便性が損なわれる。   However, if the charging rate of the storage battery for charging is reduced unplanned in preparation for the estimation of the full charge capacity, when the charging target storage battery is connected to the charger, the charging target storage battery is charged with the output power from the charging storage battery. It becomes difficult to do. The power that can be generated and output by the power converter follows the contract power that can be received from the system power supply. Therefore, if sufficient power is not output from the storage battery for charging, the storage battery to be charged cannot be quickly charged, which is convenient for the user. Is damaged.

本発明の一側面に係る目的は、ユーザの利便性を低下させずに満充電容量の推定精度を向上させる蓄電システムを提供することである。   The objective which concerns on one side of this invention is to provide the electrical storage system which improves the estimation precision of a full charge capacity, without reducing a user's convenience.

本発明に係る一つの形態である蓄電システムは、電池と制御部とを含む。制御部は、電池の使用頻度が高い時間帯では、前回の満充電容量推定からの経過時間又は前回の満充電容量推定からの電池の積算充放電量が第1の閾値を超えた場合に電池の満充電容量推定の実施を決定する。また、制御部は、電池の使用頻度が低い時間帯では、経過時間又は積算充放電量が第1の閾値よりも低い第2の閾値を超えた場合に満充電容量推定の実施を決定する。   A power storage system according to one aspect of the present invention includes a battery and a control unit. When the battery usage frequency is high, the control unit determines whether the battery has exceeded the first threshold when the elapsed time from the previous full charge capacity estimation or the accumulated charge / discharge amount of the battery from the previous full charge capacity estimation has exceeded the first threshold. To perform the full charge capacity estimation. In addition, the control unit determines to perform full charge capacity estimation when the elapsed time or the accumulated charge / discharge amount exceeds a second threshold value that is lower than the first threshold value in a time zone where the battery usage frequency is low.

一実施形態に従った蓄電システムによれば、ユーザの利便性を低下させずに満充電容量の推定精度を向上させることができる。   According to the power storage system according to the embodiment, it is possible to improve the estimation accuracy of the full charge capacity without reducing user convenience.

実施形態に従った蓄電システムの構成例を示す図である。It is a figure which shows the structural example of the electrical storage system according to embodiment. 実施形態に従った蓄電システムが実行する満充電容量推定の処理フローの一例を示す図である。It is a figure which shows an example of the processing flow of a full charge capacity estimation which the electrical storage system according to embodiment performs.

以下図面に基づいて実施形態について詳細を説明する。
図1は、実施形態に従った蓄電システムの構成例を示す図である。図1に示す充電器1は、実施形態に従った蓄電システムの一例である。なお、図1に示す一例では、系統電源Pに1つの充電器1が接続されているが、系統電源Pに複数の充電器1が接続されていてもよい。
Hereinafter, embodiments will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration example of a power storage system according to the embodiment. A charger 1 shown in FIG. 1 is an example of a power storage system according to the embodiment. In the example shown in FIG. 1, one charger 1 is connected to the system power supply P, but a plurality of chargers 1 may be connected to the system power supply P.

充電器1は、電力変換部2、充電用蓄電池3、スイッチ4〜6、電流センサ7、充電率推定部8、制御部9、及び記憶部10を含む。
電力変換部2は、系統電源Pから出力された電力を交流から直流に変換して充電対象蓄電池Bに供給することで、充電対象蓄電池Bを充電する。また、電力変換部2は、系統電源Pから出力された電力を交流から直流に変換して充電用蓄電池3に供給することで、充電用蓄電池3を充電する。なお、充電対象蓄電池Bは、例えば、電気自動車、ハイブリット車、又は電動フォークリフト等の車両に搭載されてもよい。
The charger 1 includes a power conversion unit 2, a storage battery 3 for charging, switches 4 to 6, a current sensor 7, a charging rate estimation unit 8, a control unit 9, and a storage unit 10.
The power conversion unit 2 charges the charging target storage battery B by converting the power output from the system power source P from alternating current to direct current and supplying the converted power to the charging target storage battery B. The power conversion unit 2 charges the charging storage battery 3 by converting the power output from the system power supply P from alternating current to direct current and supplying it to the charging storage battery 3. The storage battery B to be charged may be mounted on a vehicle such as an electric vehicle, a hybrid vehicle, or an electric forklift.

充電用蓄電池3は、実施形態に従った電池の一例である。充電用蓄電池3は、例えば、1つ以上のリチウムイオン電池、ニッケル水素電池、または、電気二重層コンデンサにより構成される。充電用蓄電池3は、蓄電された電力を充電対象蓄電池Bに供給することで、充電対象蓄電池Bを充電する。   The storage battery 3 for charging is an example of a battery according to the embodiment. The charging storage battery 3 is constituted by, for example, one or more lithium ion batteries, nickel metal hydride batteries, or electric double layer capacitors. The charging storage battery 3 charges the charging target storage battery B by supplying the stored power to the charging target storage battery B.

スイッチ4〜6は、例えば、MOSFET(Metal Oxide Semiconductor Field Effect Transistor)等の半導体スイッチや電磁式リレーにより構成される。スイッチ4は、電力変換部2と充電ケーブルCaとを繋ぐ電力線L1に設けられ、スイッチ5は、電力変換部2と充電用蓄電池3とを繋ぐ電力線L2に設けられ、スイッチ6は、充電用蓄電池3と充電ケーブルCaとを繋ぐ電力線L3に設けられている。   The switches 4 to 6 are configured by, for example, a semiconductor switch such as a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) or an electromagnetic relay. The switch 4 is provided on the power line L1 that connects the power conversion unit 2 and the charging cable Ca, the switch 5 is provided on the power line L2 that connects the power conversion unit 2 and the charging storage battery 3, and the switch 6 is a charging storage battery. 3 and the charging cable Ca are provided on a power line L3.

スイッチ4が閉じているとき、系統電源Pから出力された電力は電力変換部2を介して充電対象蓄電池Bに供給される。スイッチ5が閉じているとき、系統電源Pから出力された電力は電力変換部2を介して充電用蓄電池3に供給される。スイッチ6が閉じているとき、充電用蓄電池3から出力された電力は充電対象蓄電池Bに供給される。このように、図1に示す構成例では、充電対象蓄電池Bに対する電力供給源として、系統電源Pと充電用蓄電池3とが備えられる。   When the switch 4 is closed, the power output from the system power supply P is supplied to the charging target storage battery B through the power conversion unit 2. When the switch 5 is closed, the power output from the system power supply P is supplied to the charging storage battery 3 via the power conversion unit 2. When the switch 6 is closed, the power output from the charging storage battery 3 is supplied to the charging target storage battery B. Thus, in the configuration example shown in FIG. 1, the system power supply P and the charging storage battery 3 are provided as power supply sources for the charging target storage battery B.

電流センサ7は、例えば、ホール素子やシャント抵抗により構成されてもよい。電流センサ7は、充電用蓄電池3に流れる電流を検出する。
充電率推定部8は、例えば、CPU(Central Processing Unit)、マルチコアCPU、又はプログラマブルディバイス(FPGA(Field Programmable Gate Array)やPLD(Programmable Logic Device)等)により構成される。充電率推定部8は、充電用蓄電池3の電圧等に基づいて、充電用蓄電池3の充電率(SOC)を推定する。例えば、充電率推定部8は、充電用蓄電池3の開回路電圧(Open Circuit Voltage(OCV))と充電率との対応関係を示す情報を記憶部10から取得して、充電用蓄電池3の現在の開回路電圧に対応する現在の充電率を求めてもよい。記憶部10は、例えば、ROM(Read Only Memory)又はRAM(Random Access Memory)により構成される。なお、充電率推定部8は、スイッチ5が開いているときの充電用蓄電池3の電圧を充電用蓄電池3の現在の開回路電圧としてもよい。また、充電率推定部8は、スイッチ5が閉じているときの充電用蓄電池の閉回路電圧(Closed Circuit Voltage(CCV))と所定の補正値とを用いて充電用蓄電池3の現在の開回路電圧を算出してもよい。
The current sensor 7 may be configured by, for example, a hall element or a shunt resistor. The current sensor 7 detects a current flowing through the charging storage battery 3.
The charging rate estimation unit 8 is configured by, for example, a CPU (Central Processing Unit), a multi-core CPU, or a programmable device (FPGA (Field Programmable Gate Array), PLD (Programmable Logic Device, etc.)). The charging rate estimation unit 8 estimates the charging rate (SOC) of the charging storage battery 3 based on the voltage of the charging storage battery 3 and the like. For example, the charging rate estimation unit 8 acquires information indicating a correspondence relationship between the open circuit voltage (OCV) of the charging storage battery 3 and the charging rate from the storage unit 10, and acquires the current storage battery 3. The current charging rate corresponding to the open circuit voltage may be obtained. The storage unit 10 is configured by, for example, a ROM (Read Only Memory) or a RAM (Random Access Memory). The charging rate estimation unit 8 may use the voltage of the charging storage battery 3 when the switch 5 is open as the current open circuit voltage of the charging storage battery 3. Further, the charging rate estimation unit 8 uses the closed circuit voltage (CCV) of the charging storage battery when the switch 5 is closed and a predetermined correction value, and the current open circuit of the charging storage battery 3. The voltage may be calculated.

また、充電率推定部8は、充電用蓄電池3の充放電中に電流センサ7により検出された電流を積算することによって、充電用蓄電池3の積算充放電量[Ah]を求める。例えば、充電率推定部8は、充電用蓄電池3の満充電容量推定の実施中、すなわち、充電用蓄電池3の充電中に電流センサ7により検出された電流を積算することによって、充電用蓄電池3の積算電流量[Ah]を求める。なお、充電率推定部8は、充電開始前の充電率に、充電中の積算電流量[Ah]を満充電容量[Ah]で除算した値を加算して、充電中の充電用蓄電池3の充電率を求めてもよい。   Moreover, the charging rate estimation part 8 calculates | requires integrated charge / discharge amount [Ah] of the storage battery 3 for charging by integrating | accumulating the electric current detected by the current sensor 7 during charging / discharging of the storage battery 3 for charging. For example, the charging rate estimator 8 integrates the current detected by the current sensor 7 during the estimation of the full charge capacity of the charging storage battery 3, that is, during charging of the charging storage battery 3. Current amount [Ah] is obtained. The charging rate estimation unit 8 adds the value obtained by dividing the accumulated current amount [Ah] during charging by the full charging capacity [Ah] to the charging rate before the start of charging, so that the charging battery 3 being charged is charged. You may ask for a charge rate.

制御部9は、電力供給制御部91、満充電容量推定決定部92、及び満充電容量推定部93を含む。なお、充電率推定部8は制御部9に含まれてもよい。制御部9は、例えば、CPU、マルチコアCPU、又はプログラマブルディバイスにより構成される。例えば、CPU、マルチコアCPU、またはプログラマブルディバイスが所定のプログラムを実行することによって、充電率推定部8、電力供給制御部91、満充電容量推定決定部92、及び満充電容量推定部93が実現される。   The control unit 9 includes a power supply control unit 91, a full charge capacity estimation determination unit 92, and a full charge capacity estimation unit 93. The charging rate estimation unit 8 may be included in the control unit 9. The control unit 9 is constituted by, for example, a CPU, a multi-core CPU, or a programmable device. For example, when the CPU, multi-core CPU, or programmable device executes a predetermined program, the charging rate estimation unit 8, the power supply control unit 91, the full charge capacity estimation determination unit 92, and the full charge capacity estimation unit 93 are realized. The

電力供給制御部91は、電流センサDにより検出された系統電源Pの出力電流に基づいて、系統電源Pから出力される電力を求める。電流センサDは、例えば、ホール素子やシャント抵抗により構成される。電力供給制御部91は、系統電源Pから出力される電力が電力閾値(例えば、契約電力)を超えないように、電力変換部2及びスイッチ4〜6の動作を制御する。電力供給制御部91は、電力変換部2及びスイッチ4〜6の動作を制御することを通じて、系統電源Pから充電対象蓄電池Bへの電力供給、系統電源Pから充電用蓄電池3への電力供給、及び充電用蓄電池3から充電対象蓄電池Bへの電力供給を制御する。   The power supply control unit 91 obtains the power output from the system power supply P based on the output current of the system power supply P detected by the current sensor D. The current sensor D is composed of, for example, a Hall element or a shunt resistor. The power supply control unit 91 controls the operations of the power conversion unit 2 and the switches 4 to 6 so that the power output from the system power supply P does not exceed a power threshold (for example, contract power). The power supply control unit 91 controls the operation of the power conversion unit 2 and the switches 4 to 6, thereby supplying power from the system power supply P to the charging target storage battery B, supplying power from the system power supply P to the charging storage battery 3, And the electric power supply from the storage battery 3 for charge to the storage battery B to be charged is controlled.

また、充電用蓄電池3の満充電容量推定の実施が決定された場合、電力供給制御部91は、満充電容量推定の開始時の充電用蓄電池3の充電率を、予め設定された推定実施閾値以下に低くするために、スイッチ5を開くことで充電用蓄電池3の充電を控える。満充電容量推定の開始時の充電用蓄電池3の充電率が推定実施閾値以下に低くされることで、満充電容量推定の実施中、すなわち、充電中の積算電流量を大きくすることができ、電流センサ7の計測誤差の影響を低減できる。このため、充電用蓄電池3の満充電容量の推定精度を向上させることができる。   In addition, when it is determined to perform the full charge capacity estimation of the charging storage battery 3, the power supply control unit 91 sets the charging rate of the charging storage battery 3 at the start of the full charge capacity estimation to a preset estimated execution threshold value. In order to make it lower, charging of the charging storage battery 3 is refrained by opening the switch 5. By reducing the charging rate of the charging storage battery 3 at the start of the estimation of the full charge capacity below the estimated execution threshold value, it is possible to increase the integrated current amount during the full charge capacity estimation, that is, during charging. The influence of the measurement error of the sensor 7 can be reduced. For this reason, the estimation precision of the full charge capacity of the storage battery 3 for charge can be improved.

満充電容量推定決定部92は、充電用蓄電池3の満充電容量推定の実施を決定する。満充電容量推定の実施は、充電用蓄電池3の前回の満充電容量推定からの経過時間が所定の閾値を超えたか否かという判定条件を用いて決定されてもよい。又は、満充電容量推定の実施は、前回の満充電容量推定からの充電用蓄電池3の積算充放電量が所定の閾値を超えたか否かという判定条件を用いて決定されてもよい。   The full charge capacity estimation determination unit 92 determines to perform full charge capacity estimation of the storage battery 3 for charging. The implementation of the full charge capacity estimation may be determined using a determination condition as to whether or not the elapsed time from the previous full charge capacity estimation of the charging storage battery 3 has exceeded a predetermined threshold value. Alternatively, the full charge capacity estimation may be performed using a determination condition as to whether or not the accumulated charge / discharge amount of the charging storage battery 3 from the previous full charge capacity estimation has exceeded a predetermined threshold.

上述の判定条件の所定の閾値としては、充電用蓄電池3が充電対象蓄電池Bへの放電に使用される可能性が高い時間帯、すなわち、充電用蓄電池3の使用頻度が高い時間帯には、第1の閾値が用いられる。第1の閾値は、満充電容量推定部93により推定される充電用蓄電池3の満充電容量(満充電容量推定値)が充電用蓄電池3の実際の満充電容量(実満充電容量)から乖離することを抑制するために設定された値である。また、上述の判定条件の所定の閾値としては、充電用蓄電池3が充電対象蓄電池Bへの放電に使用される可能性が低い時間帯、すなわち、充電用蓄電池3の使用頻度が低い時間帯には、第1の閾値よりも低い(小さい)第2の閾値が用いられる。   As a predetermined threshold value of the above-described determination condition, in a time zone in which the charging storage battery 3 is likely to be used for discharging to the charging target storage battery B, that is, in a time zone in which the charging storage battery 3 is used frequently, A first threshold is used. The first threshold value is that the full charge capacity (estimated full charge capacity) of the charge storage battery 3 estimated by the full charge capacity estimation unit 93 is different from the actual full charge capacity (actual full charge capacity) of the charge storage battery 3. It is a value set to suppress this. Moreover, as a predetermined threshold value of the above-described determination condition, a time zone in which the charging storage battery 3 is less likely to be used for discharging to the charging target storage battery B, that is, a time zone in which the usage frequency of the charging storage battery 3 is low. Is a second threshold that is lower (smaller) than the first threshold.

例えば、満充電容量推定の実施中、すなわち、充電用蓄電池3の充電中に、電力閾値(例えば、契約電力)による制限等の原因により、充電用蓄電池3から充電対象蓄電池Bへの放電が求められるケースがあり得る。こうしたケースが発生した場合、充電対象蓄電池Bを速やかに充電したいユーザの利便性を優先するために、充電用蓄電池3から充電対象蓄電池Bへの放電が開始されることが望ましい。充電用蓄電池3から充電対象蓄電池Bへの放電が開始された場合、実施中の満充電容量推定は中止される。   For example, during the estimation of the full charge capacity, that is, during charging of the charging storage battery 3, discharge from the charging storage battery 3 to the charging target storage battery B is required due to a limitation due to a power threshold (for example, contract power). There may be cases. When such a case occurs, it is desirable that discharge from the charging storage battery 3 to the charging target storage battery B is started in order to give priority to the convenience of the user who wants to charge the charging target storage battery B quickly. When the discharge from the charging storage battery 3 to the charging target storage battery B is started, the full charge capacity estimation being performed is stopped.

しかしながら、充電用蓄電池3の使用頻度が低い時間帯では、上述のようなケースが発生する可能性が低く、実施中の満充電容量推定が中止される可能性は低い。そこで、充電用蓄電池3の使用頻度が低い時間帯では、満充電容量推定決定部92は、満充電容量推定が可及的に実施されるように、判定条件に第1の閾値よりも低い第2の閾値を用いて満充電容量推定の実施を決定する。すなわち、満充電容量推定決定部92は、充電用蓄電池3の前回の満充電容量推定からの経過時間が第2の閾値を超えた場合に満充電容量推定の実施を決定する。又は、満充電容量推定決定部92は、前回の満充電容量推定からの充電用蓄電池の積算充放電量が第2の閾値を超えた場合に満充電容量推定の実施を決定する。   However, in the time zone when the usage frequency of the storage battery 3 for charging is low, there is a low possibility that the case described above will occur, and the possibility that the full charge capacity estimation during the implementation will be stopped is low. Therefore, in the time zone when the usage frequency of the charging storage battery 3 is low, the full charge capacity estimation determination unit 92 sets the determination condition to a value lower than the first threshold so that the full charge capacity estimation is performed as much as possible. A threshold of 2 is used to determine the implementation of full charge capacity estimation. That is, the full charge capacity estimation determination unit 92 determines to perform the full charge capacity estimation when the elapsed time from the previous full charge capacity estimation of the charging storage battery 3 exceeds the second threshold. Alternatively, the full charge capacity estimation determining unit 92 determines to perform full charge capacity estimation when the accumulated charge / discharge amount of the storage battery from the previous full charge capacity estimation exceeds the second threshold.

一方、充電用蓄電池3の使用頻度が高い時間帯では、上述のようなケースが発生する可能性が高く、実施中の満充電容量推定が中止される可能性が高い。そこで、充電用蓄電池3の使用頻度が高い時間帯では、満充電容量推定を実施しないことも考えられる。しかしながら、充電用蓄電池3の使用頻度が低い時間帯においても満充電容量推定が実施されない場合には、満充電容量推定値と実満充電容量との乖離が広がってしまう。例えば、ユーザの使用パターンの変化によって、充電用蓄電池3の使用頻度が低い時間帯での充電用蓄電池3の使用頻度が高くなった場合には、満充電容量推定が実施されない状況が続き、満充電容量推定値と実満充電容量との乖離が広がってしまう。また、例えば、充電用蓄電池3の使用頻度が低い時間帯が短い場合や、充電用蓄電池3の使用頻度が低い時間帯での充電対象蓄電池Bの充電をユーザが禁止している場合には、満充電容量推定が実施されない状況が続き、乖離が広がってしまう。そこで、充電用蓄電池3の使用頻度が高い時間帯では、満充電容量推定決定部92は、判定条件に第1の閾値を用いて満充電容量推定の実施を決定する。すなわち、満充電容量推定決定部92は、充電用蓄電池3の前回の満充電容量推定からの経過時間が第1の閾値を超えた場合に満充電容量推定の実施を決定する。又は、満充電容量推定決定部92は、前回の満充電容量推定からの充電用蓄電池の積算充放電量が第1の閾値を超えた場合に満充電容量推定の実施を決定する。第1の閾値が用いられることで、充電用蓄電池3の使用頻度が高い時間帯では、満充電容量推定値が実満充電容量から乖離することを抑制するために必要な限度で満充電容量推定が実施される。   On the other hand, in the time zone in which the storage battery 3 is used frequently, there is a high possibility that the above case will occur, and the full charge capacity estimation being performed is likely to be canceled. Therefore, it is conceivable that the full charge capacity estimation is not performed in a time zone in which the charging storage battery 3 is used frequently. However, when the full charge capacity estimation is not performed even in a time zone in which the charging storage battery 3 is used less frequently, the difference between the full charge capacity estimated value and the actual full charge capacity is widened. For example, when the usage frequency of the charging storage battery 3 increases during a time period when the usage frequency of the charging storage battery 3 is low due to a change in the usage pattern of the user, the situation where the full charge capacity estimation is not performed continues. The gap between the estimated charge capacity value and the actual full charge capacity widens. In addition, for example, when the time when the usage frequency of the charging storage battery 3 is low is short or when the user prohibits the charging of the charging target storage battery B in the time zone when the usage frequency of the charging storage battery 3 is low, The situation in which full charge capacity estimation is not performed continues, and the divergence spreads. Therefore, in a time zone in which the charging storage battery 3 is used frequently, the full charge capacity estimation determination unit 92 determines to perform full charge capacity estimation using the first threshold value as the determination condition. That is, the full charge capacity estimation determination unit 92 determines to perform the full charge capacity estimation when the elapsed time from the previous full charge capacity estimation of the charging storage battery 3 exceeds the first threshold. Alternatively, the full charge capacity estimation determination unit 92 determines to perform full charge capacity estimation when the accumulated charge / discharge amount of the storage battery from the previous full charge capacity estimation exceeds the first threshold. When the first threshold value is used, the full charge capacity estimation is performed to the extent necessary to suppress the estimated full charge capacity from deviating from the actual full charge capacity in a time zone in which the charging storage battery 3 is used frequently. Is implemented.

第1の閾値及び第2の閾値は、充電用蓄電池3の使用頻度が高い時間帯及び充電用蓄電池3の使用頻度が低い時間帯と夫々対応付けられて、記憶部10に予め記憶される。満充電容量推定決定部92は、現在の時刻に対応する所定の閾値(第1の閾値又は第2の閾値)を記憶部10から読み出し、読み出した所定の閾値を判定条件に用いて、充電用蓄電池3の満充電容量推定の実施を決定する。   The first threshold value and the second threshold value are stored in advance in the storage unit 10 in association with a time zone in which the usage frequency of the charging storage battery 3 is high and a time zone in which the usage frequency of the charging storage battery 3 is low. The full charge capacity estimation determination unit 92 reads a predetermined threshold value (first threshold value or second threshold value) corresponding to the current time from the storage unit 10, and uses the read predetermined threshold value as a determination condition. The execution of the full charge capacity estimation of the storage battery 3 is determined.

なお、充電用蓄電池3の使用頻度が高い時間帯及び充電用蓄電池3の使用頻度が低い時間帯は、固定値として記憶部10に予め記憶されてもよい。また、充電用蓄電池3の使用頻度が高い時間帯及び充電用蓄電池3の使用頻度が低い時間帯は、充電器1の運用中に満充電容量推定決定部92により変更されてもよい。例えば、充電用蓄電池3の積算充放電量が所定値以上である時間帯が充電用蓄電池3の使用頻度が高い時間帯に設定され、該積算充放電量が所定値未満である時間帯が充電用蓄電池3の使用頻度が低い時間帯に設定されてもよい。充電用蓄電池3の積算充放電量は、充電率推定部8により算出され、満充電容量推定決定部92に送られてもよい。   In addition, the time zone when the usage frequency of the charging storage battery 3 is high and the time zone where the usage frequency of the charging storage battery 3 is low may be stored in the storage unit 10 in advance as fixed values. Further, the time zone in which the charging storage battery 3 is used frequently and the time zone in which the charging storage battery 3 is used low may be changed by the full charge capacity estimation determination unit 92 during the operation of the charger 1. For example, a time zone in which the accumulated charge / discharge amount of the charging storage battery 3 is greater than or equal to a predetermined value is set to a time zone in which the charging storage battery 3 is used frequently, and a time zone in which the accumulated charge / discharge amount is less than the predetermined value is charged. You may set to the time slot | zone when the usage frequency of the storage battery 3 is low. The accumulated charge / discharge amount of the charging storage battery 3 may be calculated by the charge rate estimation unit 8 and sent to the full charge capacity estimation determination unit 92.

充電用蓄電池3の満充電容量推定の実施が決定された場合、満充電容量推定決定部92は、充電用蓄電池3の満充電容量推定の実施を満充電容量推定部93に指示する。
満充電容量推定部93は、満充電容量推定の実施を満充電容量推定決定部92から指示されると、満充電容量推定の準備を充電率推定部8及び電力供給制御部91に通知する。満充電容量推定の準備が通知されると、電力供給制御部91は、満充電容量推定の開始時の充電用蓄電池3の充電率を、予め設定された推定実施閾値以下に低くするために、スイッチ5を開くことで充電用蓄電池3の充電を控える。また、満充電容量推定の準備が通知されると、充電率推定部8は、一定時間経過毎に充電用蓄電池3の充電率を満充電容量推定部93に送る。
When execution of full charge capacity estimation of the storage battery 3 for charging is determined, the full charge capacity estimation determination unit 92 instructs the full charge capacity estimation unit 93 to perform full charge capacity estimation of the storage battery 3 for charging.
When the full charge capacity estimation unit 93 is instructed to perform full charge capacity estimation from the full charge capacity estimation determination unit 92, the full charge capacity estimation unit 93 notifies the charge rate estimation unit 8 and the power supply control unit 91 of preparation for full charge capacity estimation. When the preparation for full charge capacity estimation is notified, the power supply control unit 91 lowers the charge rate of the storage battery 3 for charging at the start of full charge capacity estimation below a preset estimation execution threshold. Opening the switch 5 refrains from charging the storage battery 3 for charging. In addition, when preparation for full charge capacity estimation is notified, the charge rate estimation unit 8 sends the charge rate of the storage battery 3 for charge to the full charge capacity estimation unit 93 every elapse of a fixed time.

充電率推定部8から受け取った充電用蓄電池3の充電率が、予め設定された推定実施閾値以下になると、満充電容量推定部93は、満充電容量推定の開始を充電率推定部8及び電力供給制御部91に通知する。満充電容量推定の開始の通知を受けると、電力供給制御部91は、電力変換部2を介して系統電源Pから供給された電力により充電用蓄電池3を充電するためにスイッチ5を閉じ、充電用蓄電池3の放電を控えるためにスイッチ6を開く。また、満充電容量推定の開始の通知を受けると、充電率推定部8は、一定時間経過毎に、蓄電池3の充電率及び積算電流量を満充電容量推定部93に送る。   When the charging rate of the charging storage battery 3 received from the charging rate estimation unit 8 becomes equal to or less than a preset estimation threshold, the full charge capacity estimation unit 93 starts the full charging capacity estimation and the power rate estimation unit 8 and power Notify the supply control unit 91. Upon receiving the notification of the start of full charge capacity estimation, the power supply control unit 91 closes the switch 5 in order to charge the storage battery 3 with the power supplied from the system power supply P via the power conversion unit 2, and performs charging. The switch 6 is opened to refrain from discharging the storage battery 3. In addition, when the notification of the start of the full charge capacity estimation is received, the charge rate estimation unit 8 sends the charge rate and integrated current amount of the storage battery 3 to the full charge capacity estimation unit 93 every time a fixed time elapses.

満充電容量推定部93は、充電用蓄電池3の充電率及び積算電流量を充電率推定部8から受け取り、記憶部10に記憶させる。満充電容量推定部93は、充電率推定部8から送られた充電用蓄電池3の充電率が満充電率(例えば、100[%])になると、充電用蓄電池3が満充電状態になったと判断する。充電用蓄電池3が満充電状態になったと判断すると、満充電容量推定部93は、充電用蓄電池3の充電終了を電力供給制御部91に通知する。電力供給制御部91は、電力変換部2の動作を停止させたり、スイッチ5を開くことで、充電用蓄電池3の充電を終了させる。   The full charge capacity estimation unit 93 receives the charging rate and the accumulated current amount of the charging storage battery 3 from the charging rate estimation unit 8 and stores them in the storage unit 10. When the charge rate of the storage battery 3 for charging sent from the charge rate estimation unit 8 reaches the full charge rate (for example, 100 [%]), the full charge capacity estimation unit 93 is in a fully charged state. to decide. When it is determined that the charging storage battery 3 is in a fully charged state, the full charging capacity estimation unit 93 notifies the power supply control unit 91 of the end of charging of the charging storage battery 3. The power supply control unit 91 ends the charging of the storage battery 3 for charging by stopping the operation of the power conversion unit 2 or opening the switch 5.

満充電容量推定部93は、前述した式(1)を用いて充電用蓄電池3の満充電容量を推定(算出)する。すなわち、満充電容量推定部93は、充電終了時の充電用蓄電池3の充電率と充電開始時の充電用蓄電池3の充電率との差分で、充電中の充電用蓄電池3の積算電流量を除算することにより、充電用蓄電池3の満充電容量を推定(算出)する。   The full charge capacity estimation unit 93 estimates (calculates) the full charge capacity of the charging storage battery 3 using the above-described equation (1). That is, the full charge capacity estimation unit 93 calculates the accumulated current amount of the charging storage battery 3 during charging by the difference between the charging rate of the charging storage battery 3 at the end of charging and the charging rate of the charging storage battery 3 at the start of charging. By dividing, the full charge capacity of the charging storage battery 3 is estimated (calculated).

実施形態に従った蓄電システムが実行する満充電容量推定の処理フローの一例を説明する。図2は、実施形態に従った蓄電システムが実行する満充電容量推定の処理フローの一例を示す図である。   An example of a processing flow of full charge capacity estimation executed by the power storage system according to the embodiment will be described. FIG. 2 is a diagram illustrating an example of a processing flow of full charge capacity estimation executed by the power storage system according to the embodiment.

満充電容量推定決定部92は、現在の時刻に対応する所定の閾値を記憶部10から取得する(ステップS1)。例えば、現在の時刻が充電用蓄電池3の使用頻度が高い時間帯に含まれるならば、取得される所定の閾値は第1の閾値である。一方、例えば、現在の時刻が充電用蓄電池3の使用頻度が低い時間帯に含まれるならば、取得される所定の閾値は第2の閾値である。   The full charge capacity estimation determination unit 92 acquires a predetermined threshold corresponding to the current time from the storage unit 10 (step S1). For example, if the current time is included in a time zone in which the charging storage battery 3 is used frequently, the predetermined threshold acquired is the first threshold. On the other hand, for example, if the current time is included in a time zone in which the charging storage battery 3 is used less frequently, the predetermined threshold to be acquired is the second threshold.

満充電容量推定決定部92は、取得した所定の閾値を判定条件に当てはめ(ステップS2)、充電用蓄電池3の満充電容量推定を実施するか否かを決定する。ステップS2で用いられる判定条件は、充電用蓄電池3の前回の満充電容量推定からの経過時間が所定の閾値を超えたか否かという判定条件であってもよい。また、ステップS2で用いられる判定条件は、前回の満充電容量推定からの充電用蓄電池の積算充放電量が所定の閾値を超えたか否かという判定条件であってもよい。   The full charge capacity estimation determining unit 92 applies the acquired predetermined threshold value to the determination condition (step S2), and determines whether or not to perform the full charge capacity estimation of the charging storage battery 3. The determination condition used in step S2 may be a determination condition of whether or not the elapsed time from the previous full charge capacity estimation of the charging storage battery 3 has exceeded a predetermined threshold. The determination condition used in step S2 may be a determination condition as to whether or not the accumulated charge / discharge amount of the charging storage battery from the previous full charge capacity estimation exceeds a predetermined threshold.

充電用蓄電池3の満充電容量推定を実施しないと決定された場合(ステップS3で“No”)、一連の処理はステップS1に戻る。例えば、充電用蓄電池3の前回の満充電容量推定からの経過時間が所定の閾値を超えない場合、又は前回の満充電容量推定からの充電用蓄電池の積算充放電量が所定の閾値を超えない場合には、充電用蓄電池3の満充電容量推定を実施しないと決定される。   When it is determined not to perform the full charge capacity estimation of the storage battery 3 for charging (“No” in step S3), the series of processing returns to step S1. For example, when the elapsed time from the previous full charge capacity estimation of the charge storage battery 3 does not exceed a predetermined threshold, or the accumulated charge / discharge amount of the charge storage battery from the previous full charge capacity estimation does not exceed the predetermined threshold In this case, it is determined that the full charge capacity estimation of the charging storage battery 3 is not performed.

一方、充電用蓄電池3の満充電容量推定を実施すると決定された場合(ステップS3で“Yes”)、満充電容量推定決定部92は、充電用蓄電池3の満充電容量推定の実施を満充電容量推定部93に指示し、一連の処理はステップS4に進む。例えば、充電用蓄電池3の前回の満充電容量推定からの経過時間が所定の閾値を超える場合、又は前回の満充電容量推定からの充電用蓄電池の積算充放電量が所定の閾値を超える場合には、充電用蓄電池3の満充電容量推定を実施すると決定される。   On the other hand, when it is determined to perform the full charge capacity estimation of the charging storage battery 3 (“Yes” in step S3), the full charge capacity estimation determination unit 92 performs the full charge capacity estimation of the charging storage battery 3 fully charged. The capacity estimation unit 93 is instructed, and the series of processing proceeds to step S4. For example, when the elapsed time from the previous full charge capacity estimation of the charging storage battery 3 exceeds a predetermined threshold, or when the accumulated charge / discharge amount of the charging storage battery from the previous full charge capacity estimation exceeds a predetermined threshold Is determined to perform the full charge capacity estimation of the storage battery 3 for charging.

ステップS4において、満充電容量推定部93は、満充電容量推定の準備を電力供給制御部91に通知し、通知を受けた電力供給制御部91はスイッチ5を開くことで充電用蓄電池3の充電を控える。また、満充電容量推定部93は、満充電容量推定の準備を充電率推定部8に通知し、通知を受けた充電率推定部8は、一定時間経過毎に充電用蓄電池3の充電率を満充電容量推定部93に送る。   In step S <b> 4, the full charge capacity estimation unit 93 notifies the power supply control unit 91 of preparation for full charge capacity estimation, and the received power supply control unit 91 opens the switch 5 to charge the charging storage battery 3. Refrain from. In addition, the full charge capacity estimation unit 93 notifies the charge rate estimation unit 8 of preparation for full charge capacity estimation, and the received charge rate estimation unit 8 determines the charge rate of the storage battery 3 for charging every certain time. The full charge capacity estimation unit 93 is sent.

充電率推定部8から受け取った充電用蓄電池3の充電率が、予め設定された推定実施閾値以下になると(ステップS5で“Yes”)、満充電容量推定部93は、満充電容量推定の開始を充電率推定部8及び電力供給制御部91に通知する。通知を受けた電力供給制御部91は、電力変換部2を動作させスイッチ5を閉じることで、系統電源Pから供給された電力により充電用蓄電池3を充電する(ステップS6)。また、電力供給制御部91は、スイッチ6を開くことで、充電中の充電用蓄電池3の放電を控える。また、通知を受けた充電率推定部8は、一定時間経過毎に、充電用蓄電池3の充電率及び積算電流量を満充電容量推定部93に送る。   When the charging rate of the charging storage battery 3 received from the charging rate estimation unit 8 is equal to or lower than a preset estimation threshold (“Yes” in step S5), the full charge capacity estimation unit 93 starts full charge capacity estimation. Is notified to the charging rate estimation unit 8 and the power supply control unit 91. Receiving the notification, the power supply control unit 91 operates the power conversion unit 2 and closes the switch 5 to charge the charging storage battery 3 with the power supplied from the system power supply P (step S6). In addition, the power supply control unit 91 refrains from discharging the charging storage battery 3 during charging by opening the switch 6. In addition, the charging rate estimation unit 8 that has received the notification sends the charging rate and the accumulated current amount of the charging storage battery 3 to the full charge capacity estimation unit 93 at every elapse of a fixed time.

ステップS6で満充電容量推定が開始された後、充電用蓄電池3の放電要求を満充電容量推定部93が電力供給制御部91から受けた場合(ステップS7で“Yes”)、満充電容量推定部93は実施中の満充電容量推定を中止し、一連の処理は終了する。この場合、電力供給制御部91は、満充電容量推定を中止する旨の応答通知を満充電容量推定部93から受けると、スイッチ6を閉じることで、充電用蓄電池3の放電を開始する。一方、充電用蓄電池3の放電要求を満充電容量推定部93が電力供給制御部91から受けない場合(ステップS7で“No”)、一連の処理はステップS8に進む。   After the full charge capacity estimation is started in step S6, when the full charge capacity estimation unit 93 receives a discharge request for the charging storage battery 3 from the power supply control unit 91 ("Yes" in step S7), the full charge capacity estimation is performed. The unit 93 stops the estimation of the full charge capacity being performed, and the series of processes ends. In this case, when the power supply control unit 91 receives a response notification indicating that the full charge capacity estimation is stopped from the full charge capacity estimation unit 93, the power supply control unit 91 starts discharging the storage battery 3 for charging by closing the switch 6. On the other hand, when the full charge capacity estimation unit 93 does not receive the discharge request of the charging storage battery 3 from the power supply control unit 91 (“No” in step S7), the series of processing proceeds to step S8.

ステップS8において、満充電容量推定部93が充電率推定部8から受け取った充電用蓄電池3の充電率が満充電率未満の場合には(ステップS8で“No”)、一連の処理はステップS6に戻る。一方、満充電容量推定部93が充電率推定部8から受け取った充電用蓄電池3の充電率が満充電率になると(ステップS8で“Yes”)、一連の処理はステップS9に進む。   In step S8, when the charging rate of the charging storage battery 3 received from the charging rate estimation unit 8 by the full charging capacity estimation unit 93 is less than the full charging rate (“No” in step S8), the series of processing is performed in step S6. Return to. On the other hand, when the charging rate of the charging storage battery 3 received from the charging rate estimation unit 8 by the full charging capacity estimation unit 93 reaches the full charging rate (“Yes” in step S8), the series of processing proceeds to step S9.

ステップ9において、満充電容量推定部93は、充電用蓄電池3の充電用蓄電池3の充電終了を電力供給制御部91に通知する。通知を受けた電力供給制御部91は、電力変換部2の動作を停止させたり、スイッチ5を開くことで、充電用蓄電池3の充電を終了させる。   In step 9, the full charge capacity estimation unit 93 notifies the power supply control unit 91 of the end of charging of the charging storage battery 3 of the charging storage battery 3. Receiving the notification, the power supply control unit 91 terminates the charging of the charging storage battery 3 by stopping the operation of the power conversion unit 2 or opening the switch 5.

満充電容量推定部93は、式(1)を用いて充電用蓄電池3の満充電容量を推定する(ステップS10)。満充電容量の推定後、満充電容量推定部93は満充電容量推定の終了を満充電容量推定決定部92に通知し、一連の処理は終了する。   The full charge capacity estimation unit 93 estimates the full charge capacity of the charging storage battery 3 using equation (1) (step S10). After the full charge capacity is estimated, the full charge capacity estimation unit 93 notifies the full charge capacity estimation determination unit 92 of the completion of the full charge capacity estimation, and the series of processes ends.

このように、満充電容量推定の実施が決定された場合には、充電用蓄電池3の充電は控えられ、満充電容量推定の開始時の充電用蓄電池3の充電率は、推定実施閾値以下に低くされる。このため、満充電容量推定の実施中、すなわち、充電用蓄電池3の充電中の積算電流量を大きくすることができ、電流センサ7の計測誤差の影響を低減でき、充電用蓄電池3の満充電容量の推定精度を向上させることができる。   As described above, when it is determined to perform the full charge capacity estimation, the charging of the charging storage battery 3 is refrained, and the charging rate of the charging storage battery 3 at the start of the full charge capacity estimation is equal to or less than the estimated execution threshold. Lowered. For this reason, it is possible to increase the integrated current amount during the full charge capacity estimation, that is, during the charging of the charging storage battery 3, reduce the influence of the measurement error of the current sensor 7, and fully charge the charging storage battery 3. The capacity estimation accuracy can be improved.

また、満充電容量推定の実施は、充電用蓄電池3の使用頻度が低い時間帯に可及的に行われ、充電用蓄電池3の使用頻度が高い時間帯では、満充電容量推定値が実満充電容量から乖離することを抑制するために必要な限度で行われる。このため、充電対象蓄電池Bを充電するために充電用蓄電池3を使用したいユーザの利便性は損なわれない。   In addition, the full charge capacity estimation is performed as much as possible in the time zone when the usage frequency of the charging storage battery 3 is low, and the full charge capacity estimation value is actually fulfilled in the time zone where the usage frequency of the charging storage battery 3 is high. This is done to the limit necessary to suppress the deviation from the charge capacity. For this reason, the convenience of the user who wants to use the storage battery 3 for charging in order to charge the storage battery B to be charged is not impaired.

したがって、実施形態に従った蓄電システムによれば、ユーザの利便性を低下させずに満充電容量の推定精度を向上させることができる。
なお、本発明は、以上の実施の形態に限定されるものでなく、本発明の要旨を逸脱しない範囲内で種々の改良、変更が可能である。
Therefore, according to the power storage system according to the embodiment, it is possible to improve the estimation accuracy of the full charge capacity without reducing the convenience for the user.
In addition, this invention is not limited to the above embodiment, A various improvement and change are possible within the range which does not deviate from the summary of this invention.

例えば、図1に示した一例では、充電用蓄電池3の満充電容量推定の実施決定、充電用蓄電池3の満充電容量推定、及び充電用蓄電池3の充放電の制御は、充電器1全体の制御を司る制御部9により行われる。しかしながら、充電用蓄電池3の満充電容量推定の実施決定、充電用蓄電池3の満充電容量推定、及び充電用蓄電池3の充放電の制御は、充電用蓄電池3を含む電池パックの各部を制御する制御部により行われてもよい。電池パックの各部を制御する制御部は、例えば、CPU、マルチコアCPU、又はプログラマブルディバイスにより構成される。また、系統電源Pに複数の充電器1が接続されている場合には、各充電器1に含まれる充電用蓄電池3の満充電容量推定の実施決定、充電用蓄電池3の満充電容量推定、及び充電用蓄電池3の充放電の制御は、複数の充電器1の動作を通信ネットワークを介して制御する制御部により行われてもよい。複数の充電器1の動作を制御する制御部は、例えば、コンピュータにより構成される。   For example, in the example illustrated in FIG. 1, the implementation decision for estimating the full charge capacity of the charging storage battery 3, the estimation of the full charge capacity of the charging storage battery 3, and the charge / discharge control of the charging storage battery 3 are performed for the entire charger 1. This is performed by the control unit 9 that controls the control. However, the implementation decision for estimating the full charge capacity of the charging storage battery 3, the estimation of the full charge capacity of the charging storage battery 3, and the control of charging / discharging of the charging storage battery 3 control each part of the battery pack including the charging storage battery 3. It may be performed by the control unit. The control part which controls each part of a battery pack is comprised by CPU, multi-core CPU, or a programmable device, for example. In addition, when a plurality of chargers 1 are connected to the system power supply P, an execution decision for estimating the full charge capacity of the charging storage battery 3 included in each charger 1, an estimation of the full charge capacity of the charging storage battery 3, And control of charging / discharging of the storage battery 3 for charge may be performed by the control part which controls operation | movement of the several charger 1 via a communication network. The control part which controls operation | movement of the several charger 1 is comprised by a computer, for example.

また、図1に示した一例では、充電用蓄電池3に対する電力供給源として系統電源Pが備えられている。しかしながら、系統電源Pの代わりに、回生により充電用蓄電池3を充電する内燃機関(エンジン)が備えられもよい。そこで、実施形態に従った蓄電システムは、例えば、充電用蓄電池3及び内燃機関を負荷(例えば、電動モータ)に対する電力供給源とするハイブリット車であってもよい。   In the example shown in FIG. 1, a system power supply P is provided as a power supply source for the charging storage battery 3. However, instead of the system power supply P, an internal combustion engine (engine) that charges the charging storage battery 3 by regeneration may be provided. Thus, the power storage system according to the embodiment may be, for example, a hybrid vehicle using the charging storage battery 3 and the internal combustion engine as a power supply source for a load (for example, an electric motor).

1 充電器
2 電力変換部
3 充電用蓄電池
4、5、6 スイッチ
7 電流センサ
8 充電率推定部
9 制御部
10 記憶部
91 電力供給制御部
92 満充電容量推定決定部
93 満充電容量推定部
B 充電対象蓄電池
Ca 充電ケーブル
D 電流センサ
L1、L2、L3 電力線
P 系統電源
DESCRIPTION OF SYMBOLS 1 Charger 2 Power conversion part 3 Rechargeable storage battery 4, 5, 6 Switch 7 Current sensor 8 Charge rate estimation part 9 Control part 10 Storage part 91 Power supply control part 92 Full charge capacity estimation determination part 93 Full charge capacity estimation part B Rechargeable storage battery Ca Charging cable D Current sensors L1, L2, L3 Power line P System power supply

Claims (3)

電池と、
前記電池の使用頻度が高い時間帯では、前回の満充電容量推定からの経過時間又は前回の満充電容量推定からの前記電池の積算充放電量が第1の閾値を超えた場合に前記電池の満充電容量推定の実施を決定し、前記電池の使用頻度が低い時間帯では、前記経過時間又は前記積算充放電量が前記第1の閾値よりも低い第2の閾値を超えた場合に前記満充電容量推定の実施を決定する制御部と
を含む蓄電システム。
Battery,
In a time zone when the battery is used frequently, when the elapsed time from the previous full charge capacity estimation or the accumulated charge / discharge amount of the battery from the previous full charge capacity estimation exceeds the first threshold, the battery When it is determined that full charge capacity estimation is to be performed and the battery usage frequency is low, the full charge capacity is estimated when the elapsed time or the accumulated charge / discharge amount exceeds a second threshold value lower than the first threshold value. A power storage system including a control unit that determines execution of charge capacity estimation.
請求項1に記載の蓄電システムであって、
前記制御部は、前記満充電容量推定の実施を決定した場合に、前記電池の充電率が推定実施閾値以下になるように前記電池の充電を控える
蓄電システム。
The power storage system according to claim 1,
When the control unit determines to perform the full charge capacity estimation, the control unit refrains from charging the battery so that a charging rate of the battery is equal to or less than an estimated execution threshold.
請求項1又は2に記載の蓄電システムであって、
前記制御部は、前記満充電容量推定の実施中に前記電池の放電が開始される場合には、前記満充電容量推定の実施を中止する
蓄電システム。
The power storage system according to claim 1 or 2,
The control unit stops the execution of the full charge capacity estimation when the battery starts to be discharged during the full charge capacity estimation.
JP2016143899A 2016-07-22 2016-07-22 Power storage system Pending JP2018013435A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020071070A (en) * 2018-10-29 2020-05-07 本田技研工業株式会社 Learning device, learning method, and program

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020071070A (en) * 2018-10-29 2020-05-07 本田技研工業株式会社 Learning device, learning method, and program
US11511644B2 (en) 2018-10-29 2022-11-29 Honda Motor Co., Ltd. Learning apparatus, learning method, and program

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