JP2020114055A - Battery device - Google Patents

Battery device Download PDF

Info

Publication number
JP2020114055A
JP2020114055A JP2019001518A JP2019001518A JP2020114055A JP 2020114055 A JP2020114055 A JP 2020114055A JP 2019001518 A JP2019001518 A JP 2019001518A JP 2019001518 A JP2019001518 A JP 2019001518A JP 2020114055 A JP2020114055 A JP 2020114055A
Authority
JP
Japan
Prior art keywords
battery
current
distribution
value
battery pack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2019001518A
Other languages
Japanese (ja)
Other versions
JP7139955B2 (en
Inventor
彰悟 鈴木
Shogo Suzuki
彰悟 鈴木
裕基 堀
Yuki Hori
裕基 堀
耕司 大平
Koji Ohira
耕司 大平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to JP2019001518A priority Critical patent/JP7139955B2/en
Publication of JP2020114055A publication Critical patent/JP2020114055A/en
Application granted granted Critical
Publication of JP7139955B2 publication Critical patent/JP7139955B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

To provide a battery device capable of improving the charging/discharging efficiency.SOLUTION: A battery device 1 includes a plurality of secondary batteries 10 and a distributed-current control unit 20. The plurality of secondary batteries 10 are connected in parallel with one another. The distributed-current control unit 20 controls current values of distributed currents I1, I2 distributed to the plurality of secondary batteries 10 such that the change rates of the charged states of the respective secondary batteries 10 are made uniform.SELECTED DRAWING: Figure 1

Description

本発明は、電池装置に関する。 The present invention relates to a battery device.

複数の二次電池を備える電池装置が広く利用されるようになってきており、その充放電効率を高めることが求められている。例えば、特許文献１には、互いに並列接続された複数の二次電池に対して個別に温度調整を行って内部抵抗のバラツキを低減して、各二次電池に分配される分配電流を均一化する構成が開示されている。当該構成では、並列接続された二次電池間での充放電電流のアンバランスを抑制して充放電効率の向上が図られる。 A battery device including a plurality of secondary batteries has been widely used, and it has been required to improve the charge/discharge efficiency. For example, in Patent Document 1, temperature adjustments are individually performed on a plurality of secondary batteries connected in parallel to reduce variations in internal resistance, and distribution currents distributed to the respective secondary batteries are made uniform. A configuration is disclosed. With this configuration, the imbalance of the charging/discharging current between the secondary batteries connected in parallel is suppressed, and the charging/discharging efficiency is improved.

特開２００８−１０９８４１号公報JP, 2008-109841, A

しかしながら、特許文献１に開示の構成では、互いに並列接続された複数の二次電池に劣化によって満充電容量が低下した二次電池が含まれている場合、各二次電池に分配される分配電流を均一化すると、充放電可能な容量は並列接続された複数の二次電池のうち最も満充電容量が低下した二次電池の容量に制限される。すなわち、最も満充電容量が低下した二次電池の残容量が０となるタイミングでは他の二次電池には容量が残存したり、最も満充電容量が低下した二次電池が満充電となっても他の二次電池は満充電とならないため、他の二次電池の全容量を使い切ることができない。その結果、電池装置全体としての充放電効率が低下することとなる。 However, in the configuration disclosed in Patent Document 1, when a plurality of secondary batteries connected in parallel to each other include a secondary battery whose full charge capacity has decreased due to deterioration, the distribution current distributed to each secondary battery Is equalized, the chargeable/dischargeable capacity is limited to the capacity of the secondary battery having the lowest full charge capacity among the plurality of secondary batteries connected in parallel. That is, at the timing when the remaining capacity of the secondary battery having the lowest full charge capacity becomes 0, the remaining capacity remains in the other secondary battery, or the secondary battery having the lowest full charge capacity becomes the full charge. However, since the other secondary batteries are not fully charged, the full capacity of the other secondary batteries cannot be used up. As a result, the charging/discharging efficiency of the battery device as a whole is reduced.

本発明は、かかる背景に鑑みてなされたもので、充放電効率を向上することができる電池装置を提供しようとするものである。 The present invention has been made in view of such a background, and an object thereof is to provide a battery device capable of improving charge/discharge efficiency.

本発明の一態様は、互いに並列接続された複数の二次電池（１０、１１、１２）と、
上記複数の二次電池のそれぞれにおける充電状態の変化率が互いに均一化されるように、上記二次電池に分配される分配電流の電流値を制御する分配電流制御部（２０）と、
を備える電池装置（１）にある。 One aspect of the present invention includes a plurality of secondary batteries (10, 11, 12) connected in parallel with each other,
A distribution current control unit (20) for controlling the current value of the distribution current distributed to the secondary batteries so that the rates of change of the charge states of the plurality of secondary batteries are equalized to each other;
The battery device (1) is provided with.

上記電池装置において、複数の二次電池のそれぞれの充電状態の変化率は互いに均一化されるように、各二次電池に分配される分配電流の電流値が制御される。そして、充電状態は、満充電容量に対する残容量の割合を示す。これにより、並列接続された複数の二次電池の一部に劣化による満充電容量の低下が生じても充電状態の変化率が均一化されているため、並列接続された複数の二次電池において、残容量が０となるタイミングすなわち充電状態が０％となるタイミングを一致させることができ、満充電となるタイミングすなわち充電状態が１００％となるタイミングも一致させることができる。そのため、複数の二次電池の一部に満充電容量の低下が生じたとしても、これにより充放電可能な容量が制限されることを抑制でき、二次電池の容量の使用効率を高めることが可能となる。その結果、電池装置全体としての充放電効率を向上することができる。 In the above-mentioned battery device, the current value of the distribution current distributed to each secondary battery is controlled so that the rates of change of the charge states of the plurality of secondary batteries are equalized. The charge state indicates the ratio of the remaining capacity to the full charge capacity. As a result, even if a part of the plurality of secondary batteries connected in parallel deteriorates in full charge capacity due to deterioration, the rate of change of the charging state is made uniform, so in a plurality of secondary batteries connected in parallel. The timing at which the remaining capacity becomes 0, that is, the timing at which the state of charge becomes 0% can be matched, and the timing at which the remaining capacity becomes fully charged, that is, the timing at which the state of charge becomes 100% can also be matched. Therefore, even if a part of the plurality of secondary batteries has a decrease in the full charge capacity, it is possible to suppress the limit of the chargeable/dischargeable capacity, and it is possible to improve the use efficiency of the capacity of the secondary battery. It will be possible. As a result, the charging/discharging efficiency of the battery device as a whole can be improved.

以上のごとく、本発明によれば、充放電効率を向上することができる電池装置を提供することができる。 As described above, according to the present invention, it is possible to provide a battery device capable of improving charge/discharge efficiency.

なお、特許請求の範囲及び課題を解決する手段に記載した括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものであり、本発明の技術的範囲を限定するものではない。 Note that the reference numerals in parentheses described in the claims and the means for solving the problems indicate the corresponding relationship with the specific means described in the embodiments described later, and limit the technical scope of the present invention. Not a thing.

実施形態１における、電池装置の構成を示す概念図。3 is a conceptual diagram showing a configuration of a battery device in Embodiment 1. FIG. 実施形態１における、電池装置による制御フロー図。3 is a control flow chart of the battery device according to the first embodiment. FIG. 実施形態２における、電池装置の構成を示す概念図。6 is a conceptual diagram showing the configuration of a battery device in Embodiment 2. FIG. 実施形態２における、電池装置による制御フロー図。6 is a control flow chart of the battery device according to the second embodiment. FIG. 実施形態２における、（ａ）分配電流の電流値の変化、（ｂ）電圧値の変化を示す概念図。6A and 6B are conceptual diagrams showing (a) changes in distribution current value and (b) changes in voltage value according to the second embodiment. 比較形態における、（ａ）分配電流の電流値の変化、（ｂ）電圧値の変化を示す概念図。The conceptual diagram which shows the change of the electric current value of (a) distribution current in a comparative form, and the change of the (b) voltage value.

（実施形態１）
上記電池装置の実施形態について、図１、図２を用いて説明する。
本実施形態の電池装置１は、複数の二次電池１０と分配電流制御部２０とを備える。
複数の二次電池１０は、互いに並列接続されている。
分配電流制御部２０は、複数の二次電池１０のそれぞれにおける充電状態の変化率が互いに均一化されるように、二次電池１０に分配される分配電流の電流値を制御する。 (Embodiment 1)
An embodiment of the battery device will be described with reference to FIGS. 1 and 2.
The battery device 1 of this embodiment includes a plurality of secondary batteries 10 and a distribution current control unit 20.
The plurality of secondary batteries 10 are connected in parallel with each other.
The distribution current control unit 20 controls the current value of the distribution current distributed to the secondary batteries 10 so that the rate of change of the charge state in each of the plurality of secondary batteries 10 is equalized.

以下、本実施形態の電池装置１について、詳述する。
図１に示すように、本実施形態では、複数の二次電池１０は、第１電池パック１１と第２電池パック１２とを含んでいる。第１電池パック１１及び第２電池パック１２はいずれも同数の複数の電池セルが直列接続されたものである。第１電池パック１１及び第２電池パック１２は互いに並列に接続されている。第１電池パック１１及び第２電池パック１２は初期状態ではそれぞれの満充電容量は同等となっている。しかしながら、使用に伴って劣化して第１電池パック１１及び第２電池パック１２の一方において他方よりも充放電可能な電池容量が低下する場合がある。例えば、図１に概念的に示すように、第１電池パック１１では劣化容量１３の分だけ満充電容量１４が減少することとなり、両者間で満充電容量１４のバラツキが生じる場合がある。なお、第１電池パック１１及び第２電池パック１２は図１に概念図として示すように残容量１５と内部抵抗１６を有する。複数の二次電池１０は、更に第１電池パック１１及び第２電池パック１２と並列接続される第３電池パック、第４電池パック等を備えていてもよい。各電池パックは通常、同等の構成であって初期の満充電容量は同等である。 Hereinafter, the battery device 1 of the present embodiment will be described in detail.
As shown in FIG. 1, in the present embodiment, the plurality of secondary batteries 10 include a first battery pack 11 and a second battery pack 12. Each of the first battery pack 11 and the second battery pack 12 has the same number of battery cells connected in series. The first battery pack 11 and the second battery pack 12 are connected in parallel with each other. In the initial state, the first battery pack 11 and the second battery pack 12 have the same full charge capacity. However, there is a case in which one of the first battery pack 11 and the second battery pack 12 deteriorates with use, and the chargeable/dischargeable battery capacity of one of the first battery pack 11 and the second battery pack 12 decreases. For example, as conceptually shown in FIG. 1, in the first battery pack 11, the full charge capacity 14 is reduced by the amount corresponding to the deterioration capacity 13, and there is a case where the full charge capacity 14 varies between the two. The first battery pack 11 and the second battery pack 12 have a remaining capacity 15 and an internal resistance 16 as shown in a conceptual diagram in FIG. The plurality of secondary batteries 10 may further include a third battery pack, a fourth battery pack, etc. that are connected in parallel with the first battery pack 11 and the second battery pack 12. The battery packs usually have the same configuration and have the same initial full charge capacity.

図１に示すように、電池装置１は、二次電池１０の電池特性を取得する電池特性検出部３０を備える。本実施形態では、電池特性検出部３０は、電流センサ３１、電圧センサ３２、抵抗値算出部３３、ＳＯＣ算出部３４、満充電容量算出部３５を有する。 As shown in FIG. 1, the battery device 1 includes a battery characteristic detection unit 30 that acquires the battery characteristic of the secondary battery 10. In the present embodiment, the battery characteristic detection unit 30 has a current sensor 31, a voltage sensor 32, a resistance value calculation unit 33, an SOC calculation unit 34, and a full charge capacity calculation unit 35.

図１に示す電流センサ３１は、二次電池１０としての各電池パック１１、１２にそれぞれ分配される分配電流Ｉ１、Ｉ２の電流値を検出する。電圧センサ３２は、二次電池１０としての各電池パック１１、１２にそれぞれ印加される電圧を検出する。電流センサ３１及び電圧センサ３２はいずれも公知のものを採用することができる。 The current sensor 31 shown in FIG. 1 detects the current values of the distribution currents I1 and I2 distributed to the battery packs 11 and 12 as the secondary battery 10, respectively. The voltage sensor 32 detects the voltage applied to each of the battery packs 11 and 12 as the secondary battery 10. Known current sensors 31 and voltage sensors 32 may be used.

また、図１に示す抵抗値算出部３３は、電流センサ３１及び電圧センサ３２の検出値に基づいて各電池パック１１、１２の抵抗値を算出する。ＳＯＣ算出部３４は、各電池パック１１、１２の充電状態（ＳＯＣ：State of charge）を検出する。ＳＯＣ算出部３４は、記憶部４０に予め記憶された電池パック１１、１２の開回路電圧ＯＣＶと充電状態ＳＯＣとの対応関係を表すＯＣＶ−ＳＯＣ曲線に基づいて、電圧センサ３２により検出された電池電圧からＳＯＣを算出する。記憶部４０及び格納部５０はそれぞれ不揮発性のメモリからなる。満充電容量算出部３５は、現在の電池容量とＳＯＣとから各電池パック１１、１２の満充電容量を算出する。電池特性検出部３０によりそれぞれ検出又は算出された値は格納部５０に格納される。 Further, the resistance value calculation unit 33 shown in FIG. 1 calculates the resistance values of the battery packs 11 and 12 based on the detection values of the current sensor 31 and the voltage sensor 32. The SOC calculation unit 34 detects the state of charge (SOC) of each of the battery packs 11 and 12. The SOC calculation unit 34 detects the battery detected by the voltage sensor 32 based on the OCV-SOC curve that represents the correspondence relationship between the open circuit voltage OCV of the battery packs 11 and 12 and the state of charge SOC stored in advance in the storage unit 40. SOC is calculated from the voltage. The storage unit 40 and the storage unit 50 each include a non-volatile memory. The full charge capacity calculator 35 calculates the full charge capacity of each of the battery packs 11 and 12 from the current battery capacity and SOC. The values detected or calculated by the battery characteristic detection unit 30 are stored in the storage unit 50.

図１に示すように、本実施形態では、分配電流制御部２０は、目標電流値設定部２１、比較判定部２２、温度調節部２３を有する。目標電流値設定部２１は、満充電容量算出部３５の算出結果に基づいて、各二次電池１０としての第１電池パック１１及び第２電池パック１２のそれぞれの目標電流値を設定する。目標電流値設定部２１において、目標電流値の設定は、第１電池パック１１及び第２電池パック１２における満充電容量１４の比に基づいて行う。本実施形態では、目標電流値設定部２１は、二次電池１０としての第１電池パック１１及び第２電池パック１２に流れる総電流量Ｉｔに満充電容量算出部３５により算出された満充電容量比を掛け合わせて、目標電流値を設定する。 As shown in FIG. 1, in the present embodiment, the distribution current control unit 20 has a target current value setting unit 21, a comparison determination unit 22, and a temperature adjustment unit 23. The target current value setting unit 21 sets the target current value of each of the first battery pack 11 and the second battery pack 12 as each secondary battery 10 based on the calculation result of the full charge capacity calculation unit 35. The target current value setting unit 21 sets the target current value based on the ratio of the full charge capacities 14 of the first battery pack 11 and the second battery pack 12. In the present embodiment, the target current value setting unit 21 sets the full charge capacity calculated by the full charge capacity calculation unit 35 to the total current amount It flowing through the first battery pack 11 and the second battery pack 12 as the secondary battery 10. Multiply the ratio to set the target current value.

図１に示す比較判定部２２は、電流センサ３１で検出された分配電流Ｉ１、Ｉ２の電流値と目標電流値設定部２１で設定された目標電流値とを比較し、両者の大小関係を判定する。そして、当該判定結果に基づき温度調節部２３を制御する。温度調節部２３は、二次電池１０としての各電池パック１１、１２を個別に冷却又は加熱することができるように構成されている。温度調節部２３は、冷却手段として例えば水冷機構や空冷機構などを有し、加熱手段としてヒータなどを有する。本実施形態では、分配電流Ｉ１、Ｉ２の電流値が目標電流値と同じである場合は、温度調節部２３の動作を現状維持にする。また、分配電流Ｉ１、Ｉ２の電流値が目標電流値よりも大きい場合は、温度調節部２３を対象の電池パックが加熱されるよう動作させる。また、分配電流Ｉ１、Ｉ２の電流値が目標電流値よりも小さい場合は、温度調節部２３を対象の電池パック１１、１２が冷却されるよう動作させる。 The comparison determination unit 22 shown in FIG. 1 compares the current values of the distributed currents I1 and I2 detected by the current sensor 31 with the target current value set by the target current value setting unit 21, and determines the magnitude relationship between the two. To do. Then, the temperature controller 23 is controlled based on the determination result. The temperature control unit 23 is configured to individually cool or heat each of the battery packs 11 and 12 as the secondary battery 10. The temperature control unit 23 has, for example, a water cooling mechanism or an air cooling mechanism as cooling means, and has a heater or the like as heating means. In the present embodiment, when the current values of the distributed currents I1 and I2 are the same as the target current value, the operation of the temperature adjusting unit 23 is maintained as it is. When the current values of the distributed currents I1 and I2 are larger than the target current value, the temperature controller 23 is operated so that the target battery pack is heated. When the current values of the distributed currents I1 and I2 are smaller than the target current value, the temperature controller 23 is operated so that the target battery packs 11 and 12 are cooled.

二次電池１０としての各電池パック１１、１２は、加熱されると昇温してその内部抵抗１６が上昇することとなる。その結果、内部抵抗１６が上昇した各電池パック１１、１２に流れる電流値が低下することとなる。一方、二次電池１０としての各電池パック１１、１２は、冷却されると降温してその内部抵抗１６が低下することとなる。その結果、内部抵抗１６が低下した各電池パック１１、１２に流れる電流値が上昇することとなる。 When the battery packs 11 and 12 as the secondary battery 10 are heated, the temperature rises and the internal resistance 16 thereof rises. As a result, the value of the current flowing through each of the battery packs 11 and 12 whose internal resistance 16 has risen decreases. On the other hand, when the battery packs 11 and 12 as the secondary battery 10 are cooled, the temperature of the battery packs 11 and 12 is lowered and the internal resistance 16 thereof is lowered. As a result, the value of the current flowing through each of the battery packs 11 and 12 whose internal resistance 16 has decreased is increased.

次に、電池装置１の制御フローについて、図２を用いて説明する。
まず、図２に示すステップＳ１において、電流センサ３１、電圧センサ３２により、各二次電池１０としての各電池パック１１、１２の分配電流Ｉ１、Ｉ２の電流値、電圧値を検出し、検出結果を格納部５０に格納する。その後、ステップＳ２において、満充電容量算出部３５により、各電池パック１１、１２の満充電容量を算出し、算出結果を格納部５０に格納する。 Next, the control flow of the battery device 1 will be described with reference to FIG.
First, in step S1 shown in FIG. 2, the current sensor 31 and the voltage sensor 32 detect the current value and the voltage value of the distribution currents I1 and I2 of the battery packs 11 and 12 as the secondary batteries 10, respectively, and the detection result. Are stored in the storage unit 50. Then, in step S2, the full charge capacity calculation unit 35 calculates the full charge capacities of the battery packs 11 and 12, and stores the calculation result in the storage unit 50.

そして、図２に示すステップＳ３において、目標電流値設定部２１により、第１電池パック１１及び第２電池パック１２の満充電容量の比を算出し、当該満充電容量の比に総電流値Ｉｔを掛け合わせて、第１電池パック１１及び第２電池パック１２の目標電流値をそれぞれ設定する。 Then, in step S3 shown in FIG. 2, the target current value setting unit 21 calculates the ratio of the full charge capacities of the first battery pack 11 and the second battery pack 12, and the total current value It is calculated as the ratio of the full charge capacities. The target current values of the first battery pack 11 and the second battery pack 12 are respectively set by multiplying by.

その後、図２に示すステップＳ４において、比較判定部２２により、各電池パック１１、１２において電流センサ３１によって検出された分配電流Ｉ１、Ｉ２の電流値が各電池パック１１、１２の目標電流値と同じであるか否かを電池パックごとに判定する。ステップＳ４において、第１電池パック１１における分配電流Ｉ１の電流値が目標電流値と同じであると判定された場合は、ステップＳ４のＹｅｓに進み、ステップＳ１に戻る。第２電池パック１２についても同様である。 After that, in step S4 shown in FIG. 2, the current values of the distribution currents I1 and I2 detected by the current sensor 31 in the battery packs 11 and 12 by the comparison/determination unit 22 become the target current values of the battery packs 11 and 12, respectively. Whether or not they are the same is determined for each battery pack. When it is determined in step S4 that the current value of the distribution current I1 in the first battery pack 11 is the same as the target current value, the process proceeds to Yes in step S4 and returns to step S1. The same applies to the second battery pack 12.

一方、図２に示すステップＳ４において、第１電池パック１１における分配電流Ｉ１の電流値が目標電流値と同じでないと判定された場合は、ステップＳ４のＮｏに進む。そして、ステップＳ５において、第１電池パック１１における分配電流Ｉ１の電流値が目標電流値よりも小さいか否かを判定する。ステップＳ５において、第１電池パック１１における分配電流Ｉ１の電流値が目標電流値よりも小さいと判定した場合は、ステップＳ５のＹｅｓに進む。そして、ステップＳ６において、比較判定部２２が温度調節部２３により第１電池パック１１が加熱されるように制御する。そして、スタートに戻る。第２電池パック１２についても同様に行う。 On the other hand, in step S4 shown in FIG. 2, when it is determined that the current value of the distribution current I1 in the first battery pack 11 is not the same as the target current value, the process proceeds to No in step S4. Then, in step S5, it is determined whether or not the current value of the distribution current I1 in the first battery pack 11 is smaller than the target current value. When it is determined in step S5 that the current value of the distribution current I1 in the first battery pack 11 is smaller than the target current value, the process proceeds to Yes in step S5. Then, in step S6, the comparison/determination unit 22 controls the temperature adjustment unit 23 to heat the first battery pack 11. Then return to the start. The same applies to the second battery pack 12.

一方、ステップＳ５において、第１電池パック１１における分配電流Ｉ１の電流値が目標電流値よりも小さくないと判定した場合は、ステップＳ５のＮｏに進む。そして、ステップＳ７において、比較判定部２２が温度調節部２３により第１電池パック１１が冷却されるように制御する。そして、スタートに戻る。第２電池パック１２についても同様に行う。 On the other hand, when it is determined in step S5 that the current value of the distribution current I1 in the first battery pack 11 is not smaller than the target current value, the process proceeds to No in step S5. Then, in step S7, the comparison determination unit 22 controls the temperature adjustment unit 23 to cool the first battery pack 11. Then return to the start. The same applies to the second battery pack 12.

次に、本実施形態の電池装置１における作用効果について、詳述する。
本実施形態の電池装置１では、複数の二次電池１０としての第１電池パック１１、第２電池パック１２の間で、それぞれの充電状態の変化率が互いに均一化されるように第１電池パック１１、第２電池パック１２に分配される分配電流Ｉ２の電流値を制御する。これにより、並列接続された第１電池パック１１と第２電池パック１２の一部に劣化による満充電容量の低下が生じても充電状態の変化率が互いに均一化されているため、並列接続された第１電池パック１１、第２電池パック１２において、残容量が０となるタイミングすなわち充電状態が０％となるタイミングを一致させることができ、満充電となるタイミングすなわち充電状態が１００％となるタイミングも一致させることができる。そのため、第１電池パック１１、第２電池パック１２において満充電容量１４の低下が生じたとしても、これにより充放電可能な容量が制限されることがなく、第１電池パック１１、第２電池パック１２の容量の使用効率を向上することが可能となる。その結果、電池装置全体としての充放電効率を向上することができる。 Next, the function and effect of the battery device 1 of this embodiment will be described in detail.
In the battery device 1 of the present embodiment, the first battery packs 11 and the second battery packs 12 as the plurality of secondary batteries 10 have the first battery packs so that the rates of change of their respective charge states are equalized. The current value of the distribution current I2 distributed to the pack 11 and the second battery pack 12 is controlled. As a result, even if the first battery pack 11 and the second battery pack 12 connected in parallel are partially reduced in their full charge capacities due to deterioration, the rates of change of the charging states are equalized, so that they are connected in parallel. Also, in the first battery pack 11 and the second battery pack 12, the timing when the remaining capacity becomes 0, that is, the timing when the charging state becomes 0% can be matched, and the timing when the battery is fully charged, that is, the charging state becomes 100%. The timing can also be matched. Therefore, even if the full charge capacity 14 is reduced in the first battery pack 11 and the second battery pack 12, the chargeable/dischargeable capacity is not limited thereby, and the first battery pack 11 and the second battery pack 12 are not limited. The use efficiency of the capacity of the pack 12 can be improved. As a result, the charging/discharging efficiency of the battery device as a whole can be improved.

また、本実施形態では、電池装置１は、二次電池１０の電池特性を検出する電池特性検出部３０を備える。そして、分配電流制御部２０は、電池特性検出部３０により検出された電池特性に基づいて分配電流の電流値を制御する。これにより、二次電池１０の電池特性に基づいて分配電流の電流値が制御されるため、簡易な構成で充電状態の変化率を均一化することができる。 In addition, in the present embodiment, the battery device 1 includes the battery characteristic detection unit 30 that detects the battery characteristic of the secondary battery 10. Then, the distribution current control unit 20 controls the current value of the distribution current based on the battery characteristics detected by the battery characteristics detection unit 30. As a result, the current value of the distribution current is controlled based on the battery characteristics of the secondary battery 10, so that the rate of change of the charge state can be made uniform with a simple configuration.

また、本実施形態では、電池特性検出部３０は、電池特性として二次電池１０の満充電容量を検出し、分配電流制御部２０は、電池特性検出部３０により検出され満充電容量から複数の二次電池１０としての電池パック１１、１２ごとの満充電容量比を算出し、該満充電容量比に基づいて分配電流Ｉ１、Ｉ２の電流値を制御する。これにより、電池パック１１、１２ごとの満充電容量比に基づいて、分配電流Ｉ１、Ｉ２の電流値が制御されるため、簡易な構成で充電状態の変化率を均一化することができる。 In the present embodiment, the battery characteristic detection unit 30 detects the full charge capacity of the secondary battery 10 as the battery characteristic, and the distribution current control unit 20 detects a plurality of full charge capacities from the battery charge detection unit 30. The full charge capacity ratio of each of the battery packs 11 and 12 as the secondary battery 10 is calculated, and the current values of the distribution currents I1 and I2 are controlled based on the full charge capacity ratio. As a result, the current values of the distribution currents I1 and I2 are controlled based on the full charge capacity ratio of each of the battery packs 11 and 12, so that the rate of change of the charge state can be made uniform with a simple configuration.

また、本実施形態では、分配電流制御部２０は、二次電池１０を構成する第１電池パック１１及び第２電池パック１２に流れる総電流量Ｉｔに満充電容量比を掛け合わせて、分配電流Ｉ１、Ｉ２の電流値の目標電流値を設定する。これにより、分配電流Ｉ１、Ｉ２の電流値の目標電流値が満充電容量比に基づいて設定され、簡易な構成で充電状態の変化率を均一化することができる。 In addition, in the present embodiment, the distribution current control unit 20 multiplies the total current amount It flowing through the first battery pack 11 and the second battery pack 12 that configure the secondary battery 10 by the full charge capacity ratio to obtain the distribution current. The target current value of the current value of I1 and I2 is set. As a result, the target current value of the distribution currents I1 and I2 is set based on the full charge capacity ratio, and the rate of change of the charge state can be made uniform with a simple configuration.

以上のごとく、本実施形態によれば、充放電効率を向上することができる電池装置１を提供することができる。 As described above, according to this embodiment, it is possible to provide the battery device 1 capable of improving the charge/discharge efficiency.

（実施形態２）
本実施形態では、電池特性検出部３０は、実施形態１における図１に示す抵抗値算出部３３、ＳＯＣ算出部３４及び満充電容量算出部３５に替えて、図３に示す電流量変化検出部３６を備える。電流量変化検出部３６は、電流センサ３１により取得された二次電池１０としての第１電池パック１１及び第２電池パック１２の各分配電流Ｉ１、Ｉ２の変化を検出する。 (Embodiment 2)
In the present embodiment, the battery characteristic detection unit 30 is replaced with the resistance value calculation unit 33, the SOC calculation unit 34, and the full charge capacity calculation unit 35 shown in FIG. 1 in the first embodiment, and the current amount change detection unit shown in FIG. 36 is provided. The current amount change detection unit 36 detects changes in the distribution currents I1 and I2 of the first battery pack 11 and the second battery pack 12 as the secondary battery 10 acquired by the current sensor 31.

また、本実施形態では、第１電池パック１１の分配電流Ｉ１の経路上に第１可変抵抗部２４１が設けられており、第２電池パック１２の分配電流Ｉ２の経路上に第２可変抵抗部２４２が設けられている。また、分配電流制御部２０は実施形態１の温度調節部２３に替えて抵抗値制御部２４を有する。抵抗値制御部２４は第１可変抵抗部２４１及び第２可変抵抗部２４２の少なくとも一方の抵抗値を制御して、第１電池パック１１及び第２電池パック１２のそれぞれの分配電流Ｉ１、Ｉ２に対する抵抗値の比率である抵抗比を変更可能な外部回路を形成している。 Further, in the present embodiment, the first variable resistance part 241 is provided on the path of the distribution current I1 of the first battery pack 11, and the second variable resistance part 241 is provided on the path of the distribution current I2 of the second battery pack 12. 242 is provided. Further, the distribution current control unit 20 has a resistance value control unit 24 in place of the temperature adjustment unit 23 of the first embodiment. The resistance value control unit 24 controls the resistance value of at least one of the first variable resistance unit 241 and the second variable resistance unit 242 to respond to the distribution currents I1 and I2 of the first battery pack 11 and the second battery pack 12, respectively. An external circuit capable of changing the resistance ratio, which is the ratio of resistance values, is formed.

二次電池１０において、ＳＯＣと開回路電圧（ＯＣＶ）とは相関関係があるため、ＯＣＶの変化率が第１電池パック１１と第２電池パック１２との間で揃うと、互いのＳＯＣの変化率も揃うため、ＳＯＣを均一化しやすくなる。そして、ＯＣＶの変化率を揃えるには、分配電流の電流値が増加したときはその電池パックの抵抗値を低下させ、分配電流の電流値が減少したときにはその電池パックの抵抗値を上昇させることにより、第１電池パック１１及び第２電池パック１２の抵抗比を変更することが有効となる。 In the secondary battery 10, since the SOC and the open circuit voltage (OCV) have a correlation, when the rate of change in OCV is the same between the first battery pack 11 and the second battery pack 12, the SOC changes between them. Since the rates are also uniform, it becomes easy to make the SOC uniform. In order to make the OCV change rates uniform, the resistance value of the battery pack is reduced when the current value of the distribution current increases, and the resistance value of the battery pack is increased when the current value of the distribution current decreases. Therefore, it becomes effective to change the resistance ratio of the first battery pack 11 and the second battery pack 12.

かかる観点から、本実施形態では、比較判定部２２は、電流量変化検出部３６により検出された各分配電流Ｉ１、Ｉ２の変化に基づき抵抗値制御部２４を制御するか否かを判定する。例えば、充放電時において、比較判定部２２が第１電池パック１１の分配電流Ｉ１の電流値が増加し、第２電池パック１２の分配電流Ｉ２の電流値が減少したと判定した場合には、電流値が増加した第１電池パック１１の経路上に設けられた第１可変抵抗部２４１の抵抗値を低下させるように抵抗値制御部２４を制御するとともに、電流値が減少した第２電池パック１２の経路上に設けられた第２可変抵抗部２４２の抵抗値を上昇させて、第１電池パック１１と第２電池パック１２との抵抗比を変更するように抵抗値制御部２４を制御する。また、その他の構成要素は実施形態１の場合と同様であり、本実施形態においても実施形態１の場合と同一の符号を用いてその説明を省略する。 From this point of view, in the present embodiment, the comparison determination unit 22 determines whether or not to control the resistance value control unit 24 based on the change in each of the distribution currents I1 and I2 detected by the current amount change detection unit 36. For example, when the comparison/determination unit 22 determines that the current value of the distribution current I1 of the first battery pack 11 has increased and the current value of the distribution current I2 of the second battery pack 12 has decreased when charging/discharging, The resistance value control unit 24 is controlled so as to decrease the resistance value of the first variable resistance unit 241 provided on the path of the first battery pack 11 whose current value has increased, and the second battery pack whose current value has decreased. The resistance value control unit 24 is controlled so as to increase the resistance value of the second variable resistance unit 242 provided on the 12th path and change the resistance ratio between the first battery pack 11 and the second battery pack 12. .. The other components are the same as those in the first embodiment, and the same reference numerals as those in the first embodiment are used in this embodiment as well, and the description thereof is omitted.

次に、電池装置１の制御フローについて、図４を用いて説明する。
まず、図４に示すステップＳ２１において、電流センサ３１により、各電池パック１１、１２の分配電流Ｉ１、Ｉ２の電流値を取得する。そして、ステップＳ２２において、電流量変化検出部３６において、分配電流Ｉ１、Ｉ２の電流値の微分値を取得し、格納部５０に格納する。 Next, the control flow of the battery device 1 will be described with reference to FIG.
First, in step S21 shown in FIG. 4, the current value of the distribution currents I1 and I2 of the battery packs 11 and 12 is acquired by the current sensor 31. Then, in step S<b>22, the current amount change detection unit 36 acquires the differential value of the current value of the distribution currents I<b>1 and I<b>2 and stores it in the storage unit 50.

その後、図４に示すステップＳ２３において、比較判定部２２により、分配電流Ｉ１、Ｉ２の電流値の微分値が０であるか否かを判定する。ステップＳ２３において、分配電流Ｉ１、Ｉ２の電流値の微分値が０であると判定された場合は、ステップＳ２３のＹｅｓに進み、再度ステップＳ２１に戻る。一方、ステップＳ２３において、分配電流Ｉ１、Ｉ２の電流値の微分値が０でないと判定された場合は、ステップＳ２３のＮｏに進む。 Then, in step S23 shown in FIG. 4, the comparison/determination unit 22 determines whether or not the differential value of the current values of the distribution currents I1 and I2 is zero. When it is determined in step S23 that the differential value of the current values of the distributed currents I1 and I2 is 0, the process proceeds to Yes in step S23 and returns to step S21 again. On the other hand, if it is determined in step S23 that the differential value of the current values of the distributed currents I1 and I2 is not 0, the process proceeds to No in step S23.

そして、ステップＳ２４において、比較判定部２２により、分配電流Ｉ１、Ｉ２の電流値の微分値が０より小さいか否かを判定する。ステップＳ２４において、分配電流Ｉ１、Ｉ２の電流値の微分値が０より小さいと判定された場合は、ステップＳ２４のＹｅｓに進む。そして、ステップＳ２５において、抵抗値制御部２４により、第１可変抵抗部２４１及び／又は第２可変抵抗部２４２を制御して、分配電流Ｉ１、Ｉ２のうち電流値の微分値が０より小さいと判定された方の抵抗比を上昇させる。その後、スタートに戻る。 Then, in step S24, the comparison/determination unit 22 determines whether or not the differential value of the current values of the distribution currents I1 and I2 is smaller than zero. When it is determined in step S24 that the differential value of the current values of the distributed currents I1 and I2 is smaller than 0, the process proceeds to Yes in step S24. Then, in step S25, the resistance value control unit 24 controls the first variable resistance unit 241 and/or the second variable resistance unit 242 so that the differential value of the current value of the distributed currents I1 and I2 is smaller than 0. The determined resistance ratio is increased. Then return to the start.

一方、ステップＳ２４において、分配電流Ｉ１、Ｉ２の電流値の微分値が０より小さくないと判定された場合は、ステップＳ２４のＮｏに進む。そして、ステップＳ２６において、抵抗値制御部２４により、第１可変抵抗部２４１及び／又は第２可変抵抗部２４２を制御して、分配電流Ｉ１、Ｉ２のうち電流値の微分値が０より小さくないと判定された方の抵抗比を低下させる。その後、スタートに戻る。 On the other hand, if it is determined in step S24 that the differential value of the current values of the distributed currents I1 and I2 is not smaller than 0, the process proceeds to No in step S24. Then, in step S26, the resistance value control unit 24 controls the first variable resistance unit 241 and/or the second variable resistance unit 242 so that the differential value of the current value of the distributed currents I1 and I2 is not smaller than 0. The resistance ratio determined to be lower is reduced. Then return to the start.

本実施形態では、図５（ａ）に示すように第１区間１０１では第１電池パック１１の分配電流Ｉ１と第２電池パック１２の分配電流Ｉ２の電流値は横ばいであって、図５（ｂ）に示す第１電池パック１１のＯＣＶであるＶ１の変化率と、第２電池パック１２のＯＣＶであるＶ２の変化率とは同等で揃った状態となっている。しかしながら、第２区間１０２では、図５（ａ）に示すように第１電池パック１１の分配電流Ｉ１の電流値は増加傾向を示し、第２電池パック１２の分配電流Ｉ２の電流値は減少傾向を示し、図５（ｂ）に示すようにＶ１の変化率とＶ２の変化率は揃わない状態となっている。一方、第３区間１０３において上述の抵抗比の制御を行うことにより、図５（ａ）に示すように第１電池パック１１の分配電流Ｉ１の電流値はさらに増加傾向を示し、第２電池パック１２の分配電流Ｉ２の電流値はさらに減少傾向を示して、図５（ｂ）に示すようにＶ１の変化率とＶ２の変化率が徐々に揃うように変化し、第４区間１０４において両者のＯＣＶの変化率が再度揃った状態となっている。これにより、Ｖ１とＶ２とが同じタイミングで下限に到達している。 In the present embodiment, as shown in FIG. 5A, in the first section 101, the current values of the distribution current I1 of the first battery pack 11 and the distribution current I2 of the second battery pack 12 are flat. The change rate of V1 which is the OCV of the first battery pack 11 shown in b) and the change rate of V2 which is the OCV of the second battery pack 12 are equivalent and aligned. However, in the second section 102, as shown in FIG. 5A, the distribution current I1 of the first battery pack 11 shows an increasing tendency, and the distribution current I2 of the second battery pack 12 shows a decreasing tendency. As shown in FIG. 5B, the change rate of V1 and the change rate of V2 are not aligned. On the other hand, by performing the above-described control of the resistance ratio in the third section 103, the current value of the distribution current I1 of the first battery pack 11 tends to further increase as shown in FIG. The current value of the distribution current I2 of 12 shows a further decreasing tendency, and changes so that the rate of change of V1 and the rate of change of V2 gradually become equal to each other as shown in FIG. The rate of change in OCV is in a state of being uniform again. As a result, V1 and V2 reach the lower limit at the same timing.

一方、本実施形態の抵抗値の制御を行わない場合の比較形態では、図６（ａ）に示すように、第１区間６０１では第１電池パック１１の分配電流Ｉ１’と、第２電池パック１２の分配電流Ｉ２’の電流値は横ばいであって、図６（ｂ）に示す第１電池パック１１のＯＣＶであるＶ１’の変化率と第２電池パック１２のＯＣＶであるＶ２’の変化率とは同等で揃った状態となっている。しかし、第２区間６０２では、図６（ａ）に示すように第１電池パック１１の分配電流Ｉ１’の電流値は増加傾向を示し、第２電池パック１２の分配電流Ｉ２’の電流値は減少傾向を示し、図６（ｂ）に示すようにＶ１’の変化率とＶ２’の変化率は揃わない状態となっている。さらに、当該比較形態では本実施形態における抵抗比の制御を行わないため、以降の第３区間６０３においても両者のＯＣＶの変化率は揃うことがない。これにより、Ｖ２’が下限に到達しても、Ｖ１’は下限に到達しない。 On the other hand, in the comparative embodiment in which the resistance value control of the present embodiment is not performed, as shown in FIG. 6A, in the first section 601, the distribution current I1′ of the first battery pack 11 and the second battery pack are The current value of the distribution current I2′ of No. 12 is flat, and the change rate of the OCV V1′ of the first battery pack 11 and the change of the OCV V2′ of the second battery pack 12 shown in FIG. It is in the same state as the rate and is in the same state. However, in the second section 602, as shown in FIG. 6A, the current value of the distribution current I1′ of the first battery pack 11 shows an increasing tendency, and the current value of the distribution current I2′ of the second battery pack 12 is There is a decreasing tendency, and as shown in FIG. 6B, the rate of change of V1′ and the rate of change of V2′ are not aligned. Furthermore, since the resistance ratio control in the present embodiment is not performed in the comparative embodiment, the OCV change rates of the both do not match even in the subsequent third section 603. As a result, even if V2' reaches the lower limit, V1' does not reach the lower limit.

本実施形態では、電池特性検出部３０は電池特性として各電池パック１１、１２の分配電流Ｉ１、Ｉ２の変化を検出し、分配電流制御部２０は分配電流Ｉ１、Ｉ２の変化に基づいて、複数の二次電池１０を構成する各電池パック１１、１２に流れる分配電流Ｉ１、Ｉ２に対する抵抗値の相対比率である抵抗比を変化させて、分配電流Ｉ１、Ｉ２の電流値を制御する。これにより、簡易な構成によりＳＯＣの変化率の均一化を図り、実施形態１の場合と同等の作用効果を奏することができる。 In the present embodiment, the battery characteristic detection unit 30 detects changes in the distribution currents I1 and I2 of the battery packs 11 and 12 as the battery characteristics, and the distribution current control unit 20 determines a plurality of distribution currents I1 and I2 based on the changes in the distribution currents I1 and I2. The current value of the distribution currents I1 and I2 is controlled by changing the resistance ratio, which is the relative ratio of the resistance values to the distribution currents I1 and I2 flowing in the battery packs 11 and 12 that configure the secondary battery 10. As a result, the SOC change rate can be made uniform with a simple configuration, and the same operational effect as that of the first embodiment can be achieved.

そして、本実施形態では、電池特性検出部３０は、二次電池１０を構成する各電池パック１１、１２の分配電流Ｉ１、Ｉ２の微分値を検出し、分配電流制御部２０は、微分値が上昇した分配電流Ｉ１又はＩ２における抵抗比を低下させ、微分値が低下した分配電流Ｉ１又はＩ２における抵抗比を上昇させて、分配電流Ｉ１、Ｉ２の電流値を制御する。これにより、より高精度に分配電流Ｉ１、Ｉ２の電流値を制御してＳＯＣの変化率の均一化を図ることができ、充放電効率を一層向上することができる。 Then, in the present embodiment, the battery characteristic detection unit 30 detects the differential value of the distribution currents I1 and I2 of the battery packs 11 and 12 that configure the secondary battery 10, and the distribution current control unit 20 determines that the differential value is The resistance ratio at the increased distribution current I1 or I2 is reduced, and the resistance ratio at the distribution current I1 or I2 having a reduced differential value is increased to control the current values of the distribution currents I1 and I2. As a result, the current values of the distribution currents I1 and I2 can be controlled with higher accuracy, and the SOC change rate can be made uniform, so that the charge/discharge efficiency can be further improved.

本発明は上記各実施形態に限定されるものではなく、その要旨を逸脱しない範囲において種々の実施形態に適用することが可能である。 The present invention is not limited to the above-described embodiments, and can be applied to various embodiments without departing from the spirit of the invention.

１ 電池装置
１０ 二次電池
１１ 第１電池パック
１２ 第２電池パック
２０ 分配電流制御部
２１ 目標電流値設定部
２２ 比較判定部
２３ 温度調節部
２４ 抵抗値制御部
３０ 電池特性検出部
３６ 電流量変化検出部 DESCRIPTION OF SYMBOLS 1 Battery device 10 Secondary battery 11 1st battery pack 12 2nd battery pack 20 Distribution current control part 21 Target current value setting part 22 Comparison determination part 23 Temperature control part 24 Resistance value control part 30 Battery characteristic detection part 36 Current amount change 36 Detection unit

Claims (6)

互いに並列接続された複数の二次電池（１０、１１、１２）と、
上記複数の二次電池のそれぞれにおける充電状態の変化率が互いに均一化されるように、上記二次電池に分配される分配電流の電流値を制御する分配電流制御部（２０）と、
を備える電池装置（１）。 A plurality of secondary batteries (10, 11, 12) connected in parallel with each other,
A distribution current control unit (20) for controlling the current value of the distribution current distributed to the secondary batteries so that the rates of change of the charge states of the plurality of secondary batteries are equalized to each other;
A battery device (1) comprising: 上記二次電池の電池特性を検出する電池特性検出部（３０）を備え、
上記分配電流制御部は、上記電池特性検出部により検出された電池特性に基づいて、上記分配電流の電流値を制御する、請求項１に記載の電池装置。 A battery characteristic detector (30) for detecting the battery characteristic of the secondary battery,
The battery device according to claim 1, wherein the distribution current control unit controls the current value of the distribution current based on the battery characteristic detected by the battery characteristic detection unit. 上記電池特性検出部は、上記電池特性として上記二次電池の満充電容量を検出し、
上記分配電流制御部は、上記電池特性検出部により検出された満充電容量から上記複数の二次電池ごとの満充電容量比を算出し、該満充電容量比に基づいて上記分配電流の電流値を制御する、請求項２に記載の電池装置。 The battery characteristic detection unit detects the full charge capacity of the secondary battery as the battery characteristic,
The distribution current control unit calculates a full charge capacity ratio for each of the plurality of secondary batteries from the full charge capacity detected by the battery characteristic detection unit, and a current value of the distribution current based on the full charge capacity ratio. The battery device according to claim 2, which controls the battery. 上記分配電流制御部は、上記複数の二次電池に流れる総電流量に上記満充電容量比を掛け合わせて、上記二次電池における分配電流の電流値の目標電流値を設定する、請求項３に記載の電池装置。 The distribution current control unit sets a target current value of a distribution current value in the secondary battery by multiplying the total current amount flowing in the plurality of secondary batteries by the full charge capacity ratio. The battery device according to 1. 上記電池特性検出部は、上記電池特性として上記二次電池の分配電流の変化を検出し、
上記分配電流制御部は、上記分配電流の変化に基づいて、上記二次電池における上記分配電流に対する抵抗値の相対比率である抵抗比を変化させて、上記分配電流の電流値を制御する、請求項２に記載の電池装置。 The battery characteristic detection unit detects a change in distribution current of the secondary battery as the battery characteristic,
The distribution current control unit controls a current value of the distribution current by changing a resistance ratio, which is a relative ratio of a resistance value to the distribution current in the secondary battery, based on the change of the distribution current. Item 2. The battery device according to Item 2. 上記電池特性検出部は、上記分配電流の電流値の微分値を検出し、
上記分配電流制御部は、上記微分値が上昇した分配電流における抵抗比を低下させ、上記微分値が低下した分配電流における抵抗比を上昇させて、上記分配電流の電流値を制御する、請求項５に記載の電池装置。 The battery characteristic detection unit detects the differential value of the current value of the distribution current,
The distribution current controller controls the current value of the distribution current by decreasing the resistance ratio of the distribution current having the increased differential value and increasing the resistance ratio of the distribution current having the decreased differentiation value. 5. The battery device according to item 5.
JP2019001518A 2019-01-09 2019-01-09 battery device Active JP7139955B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019001518A JP7139955B2 (en) 2019-01-09 2019-01-09 battery device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019001518A JP7139955B2 (en) 2019-01-09 2019-01-09 battery device

Publications (2)

Publication Number Publication Date
JP2020114055A true JP2020114055A (en) 2020-07-27
JP7139955B2 JP7139955B2 (en) 2022-09-21

Family

ID=71667316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019001518A Active JP7139955B2 (en) 2019-01-09 2019-01-09 battery device

Country Status (1)

Country Link
JP (1) JP7139955B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022264346A1 (en) * 2021-06-17 2022-12-22 三菱電機株式会社 Storage battery system and storage battery system charging/discharging control method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004147477A (en) * 2002-10-28 2004-05-20 Komatsu Ltd Power supply device for motor
JP2008118790A (en) * 2006-11-06 2008-05-22 Hitachi Ltd Power controller
JP2016025791A (en) * 2014-07-23 2016-02-08 本田技研工業株式会社 Power storage system
JP2016063717A (en) * 2014-09-22 2016-04-25 住友電気工業株式会社 Power storage system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004147477A (en) * 2002-10-28 2004-05-20 Komatsu Ltd Power supply device for motor
JP2008118790A (en) * 2006-11-06 2008-05-22 Hitachi Ltd Power controller
JP2016025791A (en) * 2014-07-23 2016-02-08 本田技研工業株式会社 Power storage system
JP2016063717A (en) * 2014-09-22 2016-04-25 住友電気工業株式会社 Power storage system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022264346A1 (en) * 2021-06-17 2022-12-22 三菱電機株式会社 Storage battery system and storage battery system charging/discharging control method

Also Published As

Publication number Publication date
JP7139955B2 (en) 2022-09-21

Similar Documents

Publication Publication Date Title
JP5562433B2 (en) Electric storage device discharge device
US10122188B2 (en) Battery pack
JP6195310B2 (en) Battery control system and battery pack
JP7217474B2 (en) Management device and power supply system
EP2418751B1 (en) Battery charger and battery charging method
JP4663811B2 (en) Circuit operating current balancing device and method for battery device
JP2009081981A (en) Charge state optimizing apparatus and battery pack system provided therewith
JP2010032412A (en) Power supply for vehicle
JP2009103471A (en) Device for estimating state of battery
JP5942882B2 (en) Battery system
JPWO2018079164A1 (en) Battery control device
JP2008236991A (en) Voltage balance circuit, battery unit, and battery unit control method
KR102054202B1 (en) System for Cell Temperature Balancing of Battery Pack
JPH10285818A (en) Charge and discharge controller for set battery
JP2020114055A (en) Battery device
JP2009201232A (en) Storage device
WO2017169127A1 (en) Secondary battery system
JP2021150076A (en) Power storage device
JP5709824B2 (en) Battery system, charge control device and charge control method
TW201440378A (en) Charging balancing system based on battery operating process and charging balancing method thereof
JP2013179751A (en) Battery pack control device
JP2017073889A (en) Battery controller for vehicle
JP6763195B2 (en) Charge rate estimation device
WO2022153820A1 (en) Cell balance device, battery sensing unit, and battery management system
JP6195251B2 (en) Charge control device and power storage system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210625

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220524

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20220525

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20220719

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20220809

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220822

R151 Written notification of patent or utility model registration

Ref document number: 7139955

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151