JP2011078200A - Battery pack system - Google Patents

Battery pack system Download PDF

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JP2011078200A
JP2011078200A JP2009226642A JP2009226642A JP2011078200A JP 2011078200 A JP2011078200 A JP 2011078200A JP 2009226642 A JP2009226642 A JP 2009226642A JP 2009226642 A JP2009226642 A JP 2009226642A JP 2011078200 A JP2011078200 A JP 2011078200A
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battery information
information acquisition
battery
acquisition module
data
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JP5275197B2 (en
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Hiroki Sakurai
宏樹 櫻井
Daisuke Kurose
大介 黒瀬
Tetsuro Itakura
哲朗 板倉
Nobuo Shibuya
信男 渋谷
Yoshinao Tatebayashi
義直 舘林
Takuya Iwasaki
拓哉 岩崎
Kazuyoshi Kasai
一欽 葛西
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Toshiba Corp
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    • 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

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Abstract

<P>PROBLEM TO BE SOLVED: To reduce variation of remaining capacity of battery cells, regardless of positions. <P>SOLUTION: A battery pack system comprises: a plurality of battery cells 101-10n; one to N (N is an integer of 2 or more) battery information acquiring modules 111-11n which have functions of acquiring battery information on the plurality of battery cells; and a managing unit 120 for controlling and managing the battery information acquiring modules. The battery information acquiring module includes at least two pairs of battery information acquiring circuits, a storage circuit for holding the acquired battery information, and a transmitting/receiving circuit for communication. When a data request is transmitted from a managing unit, data are transmitted sequentially from the Nth battery information acquiring module. An ith battery information acquiring module 1 adds data to be transmitted by the ith module to data to be received from the i+1th battery information acquiring module, and further, adds i-1 pieces of dummy data and transmits them to the i-1th battery information acquiring module. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、複数の電池セルから成る組電池システムに関し、特に電池情報の制御・管理、ならびに伝送方法に関する。   This invention relates to a battery module system comprising a plurality of battery cells, in particular control and management of the battery information, and to a transmission method.

電気自動車や産業用車両に用いられる電池電源では、高電圧・大容量の電圧を得るために低電圧・低容量の電池セルを多直並列に接続し組電池システムを構成している。組電池システムを安全に動作させるために、各電池セルの電圧や温度などをモニタする組電池システムが必要である。   In a battery power source used for electric vehicles and industrial vehicles, in order to obtain a high voltage and large capacity voltage, low voltage and low capacity battery cells are connected in series and parallel to form an assembled battery system. For safe operation the battery pack systems require battery pack system for monitoring the voltage, temperature, etc. of each battery cell.

このような組電池システムは、複数の電池セル９０１〜９０ｎと、電池情報取得回路と取得した情報を記憶する記憶回路とから成る送受信回路を含む電池情報取得モジュール９１１〜９１ｎと、各モジュールと通信を行う管理ユニット９２０で構成されており、管理ユニット９２０が各モジュールの制御を行っている。   Such an assembled battery system includes a battery information acquisition module 911 to 91n including a plurality of battery cells 901 to 90n, a battery information acquisition circuit and a transmission / reception circuit including a storage circuit that stores the acquired information, and communication with each module. It consists of a management unit 920 for performing the management unit 920 is performing a control of each module.

近年では、この通信に光を用いて行うものが提案されている(特許第3930171号公報)。光を用いることのメリットは、光信号に変換するために、電気信号のように電池情報取得モジュール９１１〜９１ｎの送受信回路間で信号のレベル変換が必要ないことや、送受信回路の故障によって、他のモジュールに異常な電圧がかかるなどの害を及ぼさないために、安全性が向上するといったことがあげられる。従来の構成では、図１に示すように管理ユニット９２０からの電池情報取得命令に基づき、上の電池情報取得モジュール９１１〜９１ｎから順番に下の電池情報取得モジュール９１１〜９１ｎを介して管理ユニット電池情報が伝達される。この時、上の電池情報取得モジュール９１１〜９１ｎから、自身の電池情報を送信した後は、送受信回路は動作する必要がなくオフ状態となっている。この構成では、より多くの電池情報の送受信を行う下の電池モジュール９１１〜９１ｎの電力消費が大きくなる。各電池情報取得モジュール９１１〜９１ｎは、電池セル９０１〜９０ｎらの電源により動作しているため、上側の電池セルと下側の電池セル９０１〜９０ｎでは、電池の残量にばらつきが生じてしまうという問題があった。   In recent years, a technique has been proposed in which light is used for this communication (Japanese Patent No. 3930171). The merit of using light is that there is no need for signal level conversion between the transmission / reception circuits of the battery information acquisition modules 911 to 91n as in the case of electrical signals, or because of the failure of the transmission / reception circuit in order to convert it into an optical signal. In order not to cause any harmful effects such as applying an abnormal voltage to the module, safety is improved. In the conventional configuration, as shown in FIG. 1, based on the battery information acquisition command from the management unit 920, the management unit battery is sequentially transmitted from the upper battery information acquisition module 911 to 91n via the lower battery information acquisition module 911 to 91n. Information is communicated. At this time, after transmitting the battery information from the battery information acquisition modules 911 to 91n above, the transmission / reception circuit does not need to operate and is in the off state. In this configuration, the power consumption of the battery module 911~91n under increased to transmit and receive more battery information. Since each of the battery information acquisition modules 911 to 91n is operated by the power source of the battery cells 901 to 90n, the remaining amount of the battery varies between the upper battery cell and the lower battery cell 901 to 90n. There was a problem.

特許第3930171号公報Japanese Patent No. 3930171

このように従来の電池情報取得モジュール９１１〜９１ｎと管理ユニット９２０間の通信に光信号を用いる組電池システムにおいては、電池情報取得モジュール９１１〜９１ｎの配置位置により送受信する電池情報量の違いから電池情報取得モジュール電力消費がモジュールごとで異なり、電池セルの残量にばらつきが生じてしまう問題があった。   As described above, in the battery pack system using an optical signal for communication between the conventional battery information acquisition modules 911 to 91n and the management unit 920, the battery is different from the amount of battery information transmitted and received depending on the arrangement position of the battery information acquisition modules 911 to 91n. Unlike in each module information acquisition module power consumption, there is a problem that variation occurs in the remaining amount of the battery cell.

この発明は、電池情報取得モジュールが送受信する電池情報量を揃えて各電池情報取得モジュールの電力消費を概ね等しくすることにより電池セルの残量のばらつきを位置によらず低減することを目的とする。また、この発明は、電池セルの残量ばらつきを低減する組電池システムを提供することを目的とする。   An object of the present invention is to reduce variations in the remaining amount of battery cells regardless of position by aligning the amount of battery information transmitted and received by the battery information acquisition module and making the power consumption of each battery information acquisition module approximately equal. . The present invention also aims to provide an assembled battery system for reducing residual variation of the battery cell.

複数の電池セルと、前記複数の電池セルの電池情報取得機能を有する１からN個（Nは２以上の整数）の電池情報取得モジュールと、前記電池情報取得モジュールを制御管理する管理ユニットからなる組電池システムにおいて、前記電池情報取得モジュールは電池情報取得回路と、取得した電池情報を保持する記憶回路と、通信するための送受信回路を少なくとも二組具備し、i番目の電池情報取得モジュールは、i-1番目とi+1番目の電池情報取得モジュールと通信を行い、1番目の電池情報取得モジュールは2番目の電池情報取得モジュールと管理ユニットと通信を行い、N番目の電池情報取得モジュールはN-1番目と通信を行い、管理ユニットからデータ要求が送信されると、N番目の電池情報取得モジュールから順にデータを送信し、i番目の電池情報取得モジュールはi+1番目の電池情報取得モジュールから受信したデータに自身が送信するデータを加え、さらにi-1個のダミーデータを付加してi-1番目の電池情報取得モジュールに送信することを特徴とする。   A plurality of battery cells, 1 to N battery information acquisition modules (N is an integer of 2 or more) having a battery information acquisition function of the plurality of battery cells, and a management unit that controls and manages the battery information acquisition modules. In the battery pack system, the battery information acquisition module includes at least two battery information acquisition circuits, a storage circuit that holds the acquired battery information, and a transmission / reception circuit for communication, and the i-th battery information acquisition module includes: Communicates with the i-1 and i + 1 battery information acquisition modules, the first battery information acquisition module communicates with the second battery information acquisition module and the management unit, and the Nth battery information acquisition module When communicating with the (N-1) th and a data request is sent from the management unit, data is sent in order from the Nth battery information acquisition module, and the ith battery information is sent. The acquisition module adds the data transmitted by itself to the data received from the i + 1th battery information acquisition module, and adds i-1 dummy data to transmit to the i-1th battery information acquisition module. It is characterized by.

各電池情報取得モジュールが送受信するデータ量が一定になることにより、各電池情報取得モジュールの消費電力を均一にすることができる。   Since the amount of data transmitted and received by each battery information acquisition module is constant, the power consumption of each battery information acquisition module can be made uniform.

従来例の電池情報取得モジュールと管理ユニット間の通信を説明する図。The figure explaining the communication between the battery information acquisition module and management unit of a prior art example. 本発明の組電池システムの構成ならびに電池情報伝送の流れを説明するためのブロック図。Block diagram for explaining the structure and flow of cell information transmission of the assembled battery system of the present invention. 本発明の組電池システムに用いる電池情報取得モジュールの構成を説明するブロック図。The block diagram explaining the structure of the battery information acquisition module used for the assembled battery system of this invention. 本発明の組電池システムの他の構成を示す図。The figure which shows the other structure of the assembled battery system of this invention. 本発明の電池情報取得モジュールから送信されるデータの構成を説明するブロック図。The block diagram explaining the structure of the data transmitted from the battery information acquisition module of this invention. 負荷の消費電力が大きい場合、小さい場合の動作を説明する図。The figure explaining operation | movement when the power consumption of load is large and small. 本発明の組電池システムの他の構成を示す図。The figure which shows the other structure of the assembled battery system of this invention.

以下、図面を参照しながら本実施の形態について詳細に説明する。   Hereinafter, the present embodiment will be described in detail with reference to the drawings.

図２は本実施の形態に係わる組電池システムのブロック図である。図２に示す組電池システムでは、電池セルの電圧よりも高い電圧を得るため、複数の電池セル１０１〜１０ｎを直列に接続している。組電池システム安全に動作させるため、構成する電池セル１０１〜１０ｎの両端の電圧や電池セル１０１〜１０ｎの温度などの電池情報を電池情報取得モジュール１１１〜１１ｎにて検出する。取得した電池情報は管理ユニット１２０から各電池情報取得モジュール１１１〜１１ｎに送られる送信命令に基づき、各電池情報取得モジュール１１１〜１１ｎから管理ユニット１２０に送信する。この時、送信命令は1番目の電池情報取得モジュール１０ｉからN番目の電池情報取得モジュール１１１〜１１ｎに伝送されi番目（iはNから２）の電池情報取得モジュール１０ｉの電池情報が（i-1）番目の電池情報取得モジュール１０（ｉ−ｉ）から１番目の電池情報取得モジュール１０１を介して伝送され、一番目の電池情報取得モジュール１０１から管理ユニット１２０に伝送される。このとき、伝送する電池情報にi-1個のダミーデータを付加して伝送すると、図３に示すような各電池情報取得モジュール１１１〜１１ｎ内の送受信回路１、２の使用頻度を等しくすることができる。電池情報取得モジュール１１１〜１１ｎは、図３に示すように電池セル１０１〜１０ｎより電源Vddと電源Vssが供給されているため、各電池情報取得モジュール１１１〜１１ｎの送受信回路１、２で消費する電力を概ね等しくすることができる。よって、各電池情報取得モジュール１１１〜１１ｎが接続されている電池セル１０１〜１０ｎ間での電池残量のばらつきを低減することができる。図２では、i-1個のダミーデータを付加しているが、ダミーデータの数はi-1+M個（Mは任意の整数）でも良い。   FIG. 2 is a block diagram of the assembled battery system according to the present embodiment. In the assembled battery system shown in FIG. 2, a plurality of battery cells 101 to 10n are connected in series in order to obtain a voltage higher than the voltage of the battery cells. In order to operate the assembled battery system safely, battery information such as voltages at both ends of the battery cells 101 to 10n and temperatures of the battery cells 101 to 10n are detected by the battery information acquisition modules 111 to 11n. The acquired battery information is transmitted from the battery information acquisition modules 111 to 11n to the management unit 120 based on a transmission command sent from the management unit 120 to the battery information acquisition modules 111 to 11n. At this time, the transmission command is transmitted from the first battery information acquisition module 10i to the Nth battery information acquisition modules 111 to 11n, and the battery information of the i-th (i is N to 2) battery information acquisition module 10i is (i− 1) It is transmitted from the first battery information acquisition module 10 (ii) through the first battery information acquisition module 101, and is transmitted from the first battery information acquisition module 101 to the management unit 120. At this time, if i-1 dummy data is added to the transmitted battery information and transmitted, the frequency of use of the transmission / reception circuits 1 and 2 in each of the battery information acquisition modules 111 to 11n as shown in FIG. Can do. The battery information acquisition modules 111 to 11n are consumed by the transmission / reception circuits 1 and 2 of the battery information acquisition modules 111 to 11n because the power Vdd and the power Vss are supplied from the battery cells 101 to 10n as shown in FIG. The power can be made approximately equal. Therefore, it is possible to reduce the variation in the remaining battery level among the battery cells 101 to 10n to which the battery information acquisition modules 111 to 11n are connected. In FIG. 2, i-1 dummy data is added, but the number of dummy data may be i-1 + M (M is an arbitrary integer).

図２において、N番目以外の電池情報取得モジュール１１１〜１１（ｎ−１）は、電池情報の送受信を行っているが、N番目の電池情報取得モジュール１１ｎはデータの送信のみを行っている。このため、N番目の電池情報取得モジュール１１ｎとN番目以外の電池情報取得モジュール１１１〜１１（ｎ−１）の間で消費電力が異なってしまう。そこで、図４に示すように、N番目の電池情報取得モジュール１１ｎの第一の送受信回路の出力を分岐し、一方をN-1番目の電池情報取得モジュール１１（ｎ−１）の送受信回路に接続し、もう一方をN番目の電池情報取得モジュール１１ｎの第二の送受信回路２に接続する。これによって、N番目の電池情報取得モジュール１１ｎを含む全ての電池情報取得モジュール１１１〜１１ｎの消費電量を均一に近づけることができる。   In FIG. 2, battery information acquisition modules 111 to 11 (n-1) other than the Nth transmit / receive battery information, but the Nth battery information acquisition module 11n only transmits data. For this reason, power consumption will differ between Nth battery information acquisition module 11n and battery information acquisition modules 111-11 (n-1) other than Nth. Therefore, as shown in FIG. 4, the output of the first transmission / reception circuit of the Nth battery information acquisition module 11n is branched, and one of them is used as the transmission / reception circuit of the N-1th battery information acquisition module 11 (n-1). connect to connect the other end to the second transmitting and receiving circuit 2 of the N-th battery information acquiring module 11n. Accordingly, the power consumption of all the battery information acquisition modules 111 to 11n including the Nth battery information acquisition module 11n can be made closer to each other.

図５に電池情報取得モジュール１１１〜１１ｎから送信するデータの一例を示す。送信するデータは、少なくとも電池の位置や電圧、温度などの情報を含む電池情報と、補正情報を含む。補正情報の値は、送信データの送受信時の消費電流が一定となるように決める。例えば光通信の場合はデータが１の場合に電力を消費するため、送信データ全体で１の数が等しくなるように補正情報の値を選ぶ。また、ディジタル信号の場合は、データが変化する場合に電力を消費するため、送信データ全体でデータが変化する回数が等しくなるように補正情報の値を選ぶ。これにより電池情報の値に依存せず、データの送受信時の消費電力を一定にできる。さらに、データの送受信時の消費電力とダミーデータの送受信時の消費電力を揃えることで、全ての電池情報取得モジュール１１１〜１１ｎの消費電力を均一に近づけることができる。   It shows an example of data transmitted from the battery information acquisition module 111~11n in FIG. Data to be transmitted comprises at least the position or voltage of the battery, and battery information including information such as the temperature, the correction information. The value of the correction information determined as current consumption during transmission and reception of transmission data becomes constant. For example, in the case of optical communication, power is consumed when the data is 1, so the value of the correction information is selected so that the number of 1 is equal in the entire transmission data. In the case of a digital signal, power is consumed when the data changes, so the value of the correction information is selected so that the number of times the data changes in the entire transmission data is equal. Thus without depending on the value of the battery information, possible power consumption during transmission and reception of data constant. Furthermore, by arranging the power consumption at the time of data transmission / reception and the power consumption at the time of transmission / reception of dummy data, the power consumption of all the battery information acquisition modules 111 to 11n can be made closer to each other.

電池情報取得モジュール１１１〜１１ｎは、電池セル１０１〜１０ｎより電源Vddと電源Vssが供給されているため、送受信するデータを増やすと消費電力が多くなる。組電池に接続されている機器の消費電力が大きい場合（負荷が重い場合）には、負荷と比較して電池情報取得モジュール１１１〜１１ｎの消費電力が小さいため問題とならないが、組電池に接続されている機器の消費電力が小さい場合（負荷が軽い場合）には、負荷と比較して電池情報取得モジュール１１１〜１１ｎの消費電力が大きくなるため、効率が低下してしまう。そこで、図６に示すように、負荷が重い場合には送受信データにダミーデータを付加し、負荷が軽い場合には電池情報をそのまま送受信させる。これにより、組電池システムの効率を向上させることができる。   Since the battery information acquisition modules 111 to 11n are supplied with the power source Vdd and the power source Vss from the battery cells 101 to 10n, increasing the data to be transmitted and received increases the power consumption. When the power consumption of the device connected to the assembled battery is large (when the load is heavy), there is no problem because the power consumption of the battery information acquisition modules 111 to 11n is small compared to the load, but it is connected to the assembled battery. When the power consumption of the device being used is small (when the load is light), the power consumption of the battery information acquisition modules 111 to 11n is larger than that of the load, and the efficiency is reduced. Therefore, as shown in FIG. 6, dummy data is added to transmission / reception data when the load is heavy, and battery information is transmitted and received as it is when the load is light. Thereby, the efficiency of an assembled battery system can be improved.

図７に示すように、管理ユニット１２０とN番目の電池情報取得モジュール１１ｎの第一の送受信回路１を接続し、N番目の電池情報取得モジュール１１ｎの第二の送受信回路２とN-1番目の第一の送受信回路１を接続する。電池情報の送信命令は、管理ユニット１２０からN番目の電池情報取得モジュール１１ｎに送られ、各電池取得モジュール１１１〜１１ｎから送信される電池情報はi番目（iはNから２）の電池情報取得モジュール１１ｉの電池情報が（i-1）番目の電池情報取得モジュール１１（１−ｉ）から１番目の電池情報取得モジュール１１１を介して伝送され、一番目の電池情報取得モジュール１１１から管理ユニット１２０に伝送される。このとき、送信命令にN-1個のダミーデータを付加し、電池情報にi-1個のダミーデータを付加することで、各電池情報取得モジュール１１１〜１１ｎの消費電力を概ね等しくすることができる。   As shown in FIG. 7, the management unit 120 is connected to the first transmission / reception circuit 1 of the Nth battery information acquisition module 11n, and the second transmission / reception circuit 2 of the Nth battery information acquisition module 11n is connected to the N-1th. The first transmission / reception circuit 1 is connected. The battery information transmission command is sent from the management unit 120 to the N-th battery information acquisition module 11n, and the battery information transmitted from each of the battery acquisition modules 111 to 11n is the i-th (i is 2 to N) battery information acquisition. The battery information of the module 11i is transmitted from the (i-1) th battery information acquisition module 11 (1-i) via the first battery information acquisition module 111. From the first battery information acquisition module 111, the management unit 120 is transmitted. Is transmitted. At this time, by adding N-1 dummy data to the transmission command and adding i-1 dummy data to the battery information, the power consumption of each of the battery information acquisition modules 111 to 11n can be made substantially equal. it can.

なお、本発明は上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。例えば、ダミーデータを付加するモードと、ダミーデータを付加しないモードを持つように構成しても良い。   Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined. For example, a mode for adding dummy data may be configured to have a mode which does not add dummy data.

１、２ 送受信回路
３ 記憶回路
４ 電池情報取得回路
１０１〜１０ｎ 電池セル
１１１〜１１ｎ 電池情報取得モジュール
１２０ 管理ユニット DESCRIPTION OF SYMBOLS 1, 2 Transmission / reception circuit 3 Memory circuit 4 Battery information acquisition circuit 101-10n Battery cell 111-11n Battery information acquisition module 120 Management unit

Claims (3)

複数の電池セルと、前記複数の電池セルの電池情報取得機能を有する１からN個（Nは２以上の整数）の電池情報取得モジュールと、前記電池情報取得モジュールを制御管理する管理ユニットからなる組電池システムにおいて、
前記電池情報取得モジュールは電池情報取得回路と、取得した電池情報を保持する記憶回路と、通信するための送受信回路を少なくとも二組具備し、i番目の電池情報取得モジュールは、i-1番目とi+1番目の電池情報取得モジュールと通信を行い、1番目の電池情報取得モジュールは2番目の電池情報取得モジュールと管理ユニットと通信を行い、N番目の電池情報取得モジュールはN-1番目と通信を行い、
管理ユニットからデータ要求が送信されると、N番目の電池情報取得モジュールから順にデータを送信し、i番目の電池情報取得モジュールはi+1番目の電池情報取得モジュールから受信したデータに自身が送信するデータを加え、さらにi-1個のダミーデータを付加してi-1番目の電池情報取得モジュールに送信することを特徴とする組電池システム。 A plurality of battery cells, 1 to N battery information acquisition modules (N is an integer of 2 or more) having a battery information acquisition function of the plurality of battery cells, and a management unit that controls and manages the battery information acquisition modules. In an assembled battery system,
The battery information acquisition module comprises at least two battery information acquisition circuits, a storage circuit that holds the acquired battery information, and a transmission / reception circuit for communication, and the i-th battery information acquisition module includes Communicates with the i + 1th battery information acquisition module, the first battery information acquisition module communicates with the second battery information acquisition module and the management unit, and the Nth battery information acquisition module Communicate
When a data request is transmitted from the management unit, data is transmitted in order from the Nth battery information acquisition module, and the ith battery information acquisition module transmits itself to the data received from the i + 1th battery information acquisition module The assembled battery system is characterized in that i-1 dummy data is added and transmitted to the i-1th battery information acquisition module. 前記N番目の電池情報取得モジュールと前記N-1番目の電池情報取得モジュールは配線により相互に接続され、前記配線をさらに分岐され、前記N番目の電池情報取得モジュールの第二の送受信回路に接続することを特徴とする請求項１に記載の組電池システム。   The Nth battery information acquisition module and the N-1th battery information acquisition module are connected to each other by wiring, further branching the wiring, and connected to a second transmission / reception circuit of the Nth battery information acquisition module The assembled battery system according to claim 1. 前記送信または受信されるデータは補正ビットを持ち、
前記補正ビットの値は、前記データの送受信時の消費電力が一定になるよう決定され、
前記ダミーデータの値は、前記データの消費電力と等しくなるよう決定されることを特徴とする請求項１に記載の組電池システム。 The transmitted or received data has a correction bit,
The value of the correction bit is determined so that power consumption during transmission and reception of the data is constant,
The assembled battery system according to claim 1, wherein the value of the dummy data is determined to be equal to the power consumption of the data.
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