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JP5285959B2 - Battery control device for battery pack - Google Patents

Battery control device for battery pack Download PDF

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Publication number
JP5285959B2
JP5285959B2 JP2008137651A JP2008137651A JP5285959B2 JP 5285959 B2 JP5285959 B2 JP 5285959B2 JP 2008137651 A JP2008137651 A JP 2008137651A JP 2008137651 A JP2008137651 A JP 2008137651A JP 5285959 B2 JP5285959 B2 JP 5285959B2
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battery
bus bar
unit
modules
module
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JP2009289428A (en
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靖 斎藤
武 中村
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Keihin 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
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    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Description

本発明は、複数の電池モジュールを直列に接続して構成される組電池の電源制御装置に関する。   The present invention relates to a battery pack power supply control device configured by connecting a plurality of battery modules in series.

モータのみで走行する電気自動車、又はエンジンとモータで走行するハイブリッド自動車における駆動用モータの電源として用いられるニッケル・水素蓄電池、リチウムイオン蓄電池等は、一般に、単位電池(セル)を複数個直列に接続して電池モジュールを構成し、この電池モジュールを電池収納箱内に複数個収納し、これらを直列に接続して組電池とする構成をとっている。   Nickel-hydrogen storage batteries, lithium ion storage batteries, etc. used as power sources for drive motors in electric vehicles that run only with motors or hybrid vehicles that run with engines and motors are generally connected in series. Thus, a battery module is configured, and a plurality of the battery modules are stored in a battery storage box, and these are connected in series to form a battery pack.

例えば、電気自動車、又はハイブリッド自動車用の駆動モータのための電源としては、エネルギー密度、出力密度、サイクル寿命等の基本特性に優れている密閉型ニッケル・水素蓄電池が主に使用されているが、近年エネルギー密度等の基本性能がより高いリチウムイオン電池が注目され、実用化すべく盛んに研究開発が行われている。   For example, as a power source for a drive motor for an electric vehicle or a hybrid vehicle, a sealed nickel-hydrogen storage battery that is excellent in basic characteristics such as energy density, output density, and cycle life is mainly used. In recent years, lithium ion batteries having higher basic performances such as energy density have attracted attention, and research and development has been actively conducted for practical use.

高圧バッテリとしての組電池は、コンタクタ、ヒューズ、ブレーカ(遮断器)を介し、更にパワー駆動ユニット(PDU)を介して走行用のモータに接続されている。ここで、コンタクタ、ヒューズ、ブレーカ等、高圧バッテリの保護機能を有する部品が車両の各所に分散して配置されていると、メインテナンス性の低下を招くため、従来から様々な配置が提案されている。   The assembled battery as a high-voltage battery is connected to a traveling motor via a contactor, a fuse, and a breaker (breaker), and further via a power drive unit (PDU). Here, when parts having a high voltage battery protection function such as contactors, fuses, breakers, etc. are dispersed and arranged in various parts of the vehicle, the maintenance performance is deteriorated, so various arrangements have been proposed conventionally. .

例えば、特開平11−162445号公報では、電池収納箱内に電池モジュールを複数個収納するとともに、2個の電池モジュール分の空きスペースを設け、この空きスペースに電気接続箱を収納して、電気接続箱内にメインコンタクタリレー及び安全プラグ(ブレーカ)を収納した構成が提案されている。   For example, in Japanese Patent Application Laid-Open No. 11-162445, a plurality of battery modules are stored in a battery storage box, and an empty space for two battery modules is provided. A configuration in which a main contactor relay and a safety plug (breaker) are housed in a connection box has been proposed.

また、特開平8−162171号公報では、組電池の各電池モジュールについて、その両端間に接続された電圧検出回路と、この電圧検出回路の出力をデジタル信号に変換してシリアル伝送出力する信号変換・伝送回路等を備えた電圧計測ユニットを、それぞれ対応する電池モジュールに近接して設けた組電池の監視装置が提案されている。   Japanese Patent Laid-Open No. 8-162171 discloses a voltage detection circuit connected between both ends of each battery module of an assembled battery, and a signal converter that converts the output of the voltage detection circuit into a digital signal and outputs it serially. A battery pack monitoring device has been proposed in which a voltage measurement unit including a transmission circuit or the like is provided in the vicinity of a corresponding battery module.

電池モジュール内の隣接する単位電池は正極と負極とが隣接するように配列され、複数のバスバーを有するバスバーモジュールを電池モジュール上に搭載し、バスバーモジュールを介して各電池モジュールを電池制御ユニット(バッテリECU)に接続している。隣接する単位電池の電極へのバスバーの取り付けは、従来は例えば特開2003−45409号公報に示すように、ねじ固定するのが一般的である。
特開平11−162445号公報 特開平8−162171号公報 特開2003−45409号公報
Adjacent unit cells in the battery module are arranged so that the positive electrode and the negative electrode are adjacent to each other, a bus bar module having a plurality of bus bars is mounted on the battery module, and each battery module is connected to a battery control unit (battery via the bus bar module). ECU). Conventionally, the bus bars are attached to the electrodes of the adjacent unit cells by screwing as shown in, for example, Japanese Patent Application Laid-Open No. 2003-45409.
JP-A-11-162445 JP-A-8-162171 JP 2003-45409 A

特許文献3に記載されたように、従来は隣接する単位電池へのバスバーの固定はねじ止めで行っていたため、組立て工数が掛かるという問題があった。   As described in Patent Document 3, conventionally, since the bus bar is fixed to the adjacent unit battery by screwing, there is a problem that the number of assembling steps is increased.

本発明はこのような点に鑑みてなされたものであり、その目的とするところは、組付け容易且つ簡単な構成で、隣接する単位電池間の接続及び単位電池と電池制御ユニットとの接続を実現可能なバスバーモジュールを有する組電池の電源制御装置を提供することである。   The present invention has been made in view of the above points, and the object of the present invention is to easily connect and connect between adjacent unit cells and between the unit cells and the battery control unit. It is an object of the present invention to provide an assembled battery power control device having a realizable bus bar module.

本発明によると、複数の単位電池を直列に接続して構成される電池モジュールを電池収納箱内に複数並列配置し、各前記電池モジュールを直列接続した組電池の電源制御装置であって、前記組電池及び各前記電池モジュールの電圧を制御する電池制御ユニットと、
各前記単位電池と前記電池制御ユニットの間に設けられ、隣接する前記単位電池の正極と負極とを弾性接続する複数のバスバーを有する複数のバスバーモジュールと、各前記バスバーモジュールと前記電池制御ユニットの間に設けられた中継基板と、を具備し、前記バスバーは前記中継基板接続用のリードピンを一体に形成したリードピン一体型バスバーから構成されることを特徴とする組電池の電源制御装置が提供される。
According to the present invention, a plurality of battery modules configured by connecting a plurality of unit cells in series are arranged in parallel in a battery storage box, and the battery module power supply control device in which the battery modules are connected in series, A battery control unit for controlling the voltage of the assembled battery and each of the battery modules;
A plurality of bus bar modules having a plurality of bus bars provided between each unit battery and the battery control unit and elastically connecting a positive electrode and a negative electrode of the adjacent unit cells; and each of the bus bar modules and the battery control unit A battery board power supply control device comprising: a lead board integrated bus bar formed integrally with a lead pin for connecting the relay board. The

本発明によると、バスバーモジュールを単位電池に取り付けると、バスバーが単位電池の電極に弾性接続されるため、従来のねじ固定を廃止でき、組付け工数を削減できる。更に、ねじ固定に比較して、各単位電池へ与える応力を抑えることが可能である。 According to the present invention , when the bus bar module is attached to the unit battery , the bus bar is elastically connected to the electrode of the unit battery, so that conventional screw fixing can be eliminated and the number of assembling steps can be reduced. Furthermore, it is possible to suppress the stress applied to each unit battery as compared with screw fixing.

本発明によると、リードピン一体型バスバーを使用することにより、単位電池と中継基板との接続を簡単な構成で実現でき、組付け工数を削減することができる。 According to the present invention , by using the lead pin integrated bus bar, the connection between the unit battery and the relay substrate can be realized with a simple configuration, and the number of assembling steps can be reduced.

以下、本発明の実施形態を図面を参照して詳細に説明する。図1を参照すると、本発明実施形態に係る組電池2の分解斜視図が示されている。4は組電池2の電池収納箱であり、例えば樹脂のモールド成型体から形成される。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Referring to FIG. 1, an exploded perspective view of an assembled battery 2 according to an embodiment of the present invention is shown. Reference numeral 4 denotes a battery storage box of the assembled battery 2, which is formed of, for example, a resin molded product.

電池収納箱4は、横方向に延びる仕切り板6により二つの収納スペースに区画されており、各収納スペース内に三つの電池モジュール10が収納されており、電池収納箱4内には合計6個の電池モジュール10が収納されている。仕切り板6には縦方向に延びる複数の係合溝8が形成されている。   The battery storage box 4 is divided into two storage spaces by a partition plate 6 extending in the lateral direction, and three battery modules 10 are stored in each storage space, and a total of six battery storage boxes 4 are stored in the battery storage box 4. The battery module 10 is housed. A plurality of engaging grooves 8 extending in the vertical direction are formed in the partition plate 6.

電池モジュール10は、例えば8個の単位電池(セル)12を直列接続して構成されている。単位電池12は例えばリチウムイオン電池から構成され、単位電池1個の出力電圧は3.6Vである。本実施形態の組電池2は、6個の電池モジュール10を直列接続して構成されているため、組電池2の出力電圧は3.6×8×6=172.8Vである。   The battery module 10 is configured by, for example, eight unit batteries (cells) 12 connected in series. The unit battery 12 is composed of, for example, a lithium ion battery, and the output voltage of one unit battery is 3.6V. Since the assembled battery 2 of the present embodiment is configured by connecting six battery modules 10 in series, the output voltage of the assembled battery 2 is 3.6 × 8 × 6 = 172.8V.

図2の拡大図に示すように、8個の単位電池12上には複数のバスバー(本実施形態では8個)30を有するバスモジュール14が、樹脂ボード16に一体的に形成した下方向に延びる複数の係合爪44を仕切り板6の係合溝8に係合することにより搭載されて、電池モジュール10を構成する。   As shown in the enlarged view of FIG. 2, a bus module 14 having a plurality of bus bars (eight in this embodiment) 30 on the eight unit cells 12 is formed in a downward direction integrally formed with the resin board 16. The battery module 10 is configured by mounting a plurality of extending engaging claws 44 by engaging with the engaging grooves 8 of the partition plate 6.

樹脂ボード16には、6個のリードピン一体型バスバー30がバスバー保持部34に差し込むことにより搭載されている。リードピン一体型バスバー30はリードピン32を有している。   On the resin board 16, six lead pin integrated bus bars 30 are mounted by being inserted into the bus bar holding portion 34. The lead pin integrated bus bar 30 has a lead pin 32.

バスバー保持部34は樹脂ボード16と一体的に形成されており、図3に示すように保持部34の両端に一対の開口部48を有しているため、バスバー30を保持部34に差し込むと、バスバー30の両端部が開口部48から下方に突出する。   Since the bus bar holding portion 34 is formed integrally with the resin board 16 and has a pair of openings 48 at both ends of the holding portion 34 as shown in FIG. 3, when the bus bar 30 is inserted into the holding portion 34. Both ends of the bus bar 30 protrude downward from the opening 48.

よって、バスバーモジュール14を8個の単位電池12上に取り付けると、図4及び図5に示すように、バスバー30が隣接する単位電池12の正電極28a及び負電極28bに接続される。   Therefore, when the bus bar module 14 is mounted on the eight unit cells 12, the bus bar 30 is connected to the positive electrode 28a and the negative electrode 28b of the adjacent unit cells 12 as shown in FIGS.

樹脂ボード16は更に、開口部46の対角線の延長線上に形成された2個の位置決めピン36と、上方向に延びる6個の係止爪42を有している。18は中継基板であり、コネクタ20と樹脂ボード16の位置決めピン36が挿入される2個の位置決め穴38と、リードピン一体型バスバー30のリードピン32が挿入される8個のスルーホール40を有している。   The resin board 16 further includes two positioning pins 36 formed on the diagonal extension of the opening 46 and six locking claws 42 extending upward. Reference numeral 18 denotes a relay board having two positioning holes 38 into which the positioning pins 36 of the connector 20 and the resin board 16 are inserted, and eight through holes 40 into which the lead pins 32 of the lead pin integrated bus bar 30 are inserted. ing.

図1に示すように、各中継基板18に搭載されたコネクタ20はハーネス22に接続されたコネクタ24に嵌合され、ハーネス22の端部のコネクタ26は図6に示したバッテリECU50のバッテリ信号処理用端子に接続される。   As shown in FIG. 1, a connector 20 mounted on each relay board 18 is fitted into a connector 24 connected to a harness 22, and the connector 26 at the end of the harness 22 is a battery signal of the battery ECU 50 shown in FIG. Connected to processing terminal.

中継基板18を樹脂ボード16に搭載固定するには、樹脂ボード16の位置決めピン36が中継基板18の位置決め穴38に挿入されるように中継基板18を位置決めして、中継基板18を樹脂ボード16上に搭載し、図5に示すように係合爪42により中継基板18を上から係止する。   In order to mount and fix the relay board 18 on the resin board 16, the relay board 18 is positioned so that the positioning pins 36 of the resin board 16 are inserted into the positioning holes 38 of the relay board 18. As shown in FIG. 5, the relay board 18 is locked from above by the engaging claws 42.

これにより、リードピン一体型バスバー30のリードピン32が中継基板18に形成されたスルーホール40中に挿入されることになり、各リードピン32は中継基板18に半田付け接続される。   As a result, the lead pins 32 of the lead pin integrated bus bar 30 are inserted into the through holes 40 formed in the relay substrate 18, and each lead pin 32 is soldered and connected to the relay substrate 18.

本実施形態の組電池2の電源制御装置によると、バスバーモジュール14を並んで配置した8個の単位電池12上にワンタッチ係合で搭載することにより、隣接して配置された単位電池12の正極28aと負極28bがリードピン一体型バスバー30に弾性接続されるため、従来のバスバーのねじ固定を廃止でき、簡単な構成で組付け工数を削減できる。更にねじ固定に比較して、各単位電池12への応力を抑えることが可能となる。   According to the power supply control device for the assembled battery 2 of the present embodiment, the bus bar modules 14 are mounted on the eight unit batteries 12 arranged side by side with one-touch engagement, so that the positive electrodes of the unit batteries 12 arranged adjacent to each other. Since the 28a and the negative electrode 28b are elastically connected to the lead pin integrated bus bar 30, the conventional screw fixing of the bus bar can be eliminated, and the number of assembling steps can be reduced with a simple configuration. Furthermore, it is possible to suppress the stress on each unit battery 12 as compared with screw fixing.

図6を参照すると、上述した実施形態の組電池2のブロック回路図が示されている。コネクタ24は中継基板18に搭載されたコネクタ20に接続され、各中継基板18はハーネス22を介してバッテリECU50のバッテリ信号処理用端子に接続される。よって、バッテリECU50では、各セル12の電圧、各電池モジュール10、組電池2の電圧等を常時検出可能である。   Referring to FIG. 6, a block circuit diagram of the assembled battery 2 of the above-described embodiment is shown. The connector 24 is connected to the connector 20 mounted on the relay board 18, and each relay board 18 is connected to the battery signal processing terminal of the battery ECU 50 via the harness 22. Therefore, the battery ECU 50 can always detect the voltage of each cell 12, the voltage of each battery module 10, the assembled battery 2, and the like.

コンタクタ54は、プリチャージコンタクタ54aとメインコンタクタ54bを含んでいる。自動車のイグニッションスイッチがONされると、まずプリチャージコンタクタ54aがON作動され、次いで所定のディレーをもってメインコンタクタ54bがON作動される。   The contactor 54 includes a precharge contactor 54a and a main contactor 54b. When the ignition switch of the automobile is turned on, the precharge contactor 54a is first turned on, and then the main contactor 54b is turned on with a predetermined delay.

組電池2の正極端子はPDU(パワー駆動ユニット)60の正極端子及びDV(ダウンコンバータ)64の正極端子に接続される。一方、組電池2の負極端子はPDU60の負極端子及びDV64の負極端子に接続される。   The positive terminal of the assembled battery 2 is connected to the positive terminal of a PDU (power drive unit) 60 and the positive terminal of a DV (down converter) 64. On the other hand, the negative terminal of the assembled battery 2 is connected to the negative terminal of the PDU 60 and the negative terminal of the DV 64.

これにより、組電池2はPDU60を介してモータ62を駆動するとともに、DV64により電圧を12Vに落として12V系蓄電池66を充電する。さらに、6個の電池モジュール10が直列接続される中間には、ヒューズ56及びブレーカ58が介装されている。   Thereby, the assembled battery 2 drives the motor 62 via the PDU 60 and charges the 12V storage battery 66 by reducing the voltage to 12V by the DV 64. Further, a fuse 56 and a breaker 58 are interposed between the six battery modules 10 connected in series.

本発明実施形態に係る組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery which concerns on this invention embodiment. 電池モジュールの分解斜視図である。It is a disassembled perspective view of a battery module. 樹脂ボードの裏面側斜視図である。It is a back surface side perspective view of a resin board. リードピン一体型バスバー部分の拡大斜視図である。It is an expansion perspective view of a lead pin integrated busbar part. 電池モジュールの要部拡大斜視図である。It is a principal part expansion perspective view of a battery module. 組電池のブロック回路図である。It is a block circuit diagram of an assembled battery.

符号の説明Explanation of symbols

2 組電池
4 電池収納箱
6 仕切り板
8 係合溝
10 電池モジュール
12 単位電池(セル)
14 バスバーモジュール
16 樹脂ボード
18 中継基板
30 リードピン一体型バスバー
42,44 係合爪
50 バッテリECU
56 ヒューズ
58 ブレーカ
60 PDU
62 モータ
64 ダウンコンバータ
2 Battery pack 4 Battery storage box 6 Partition plate 8 Engaging groove 10 Battery module 12 Unit battery (cell)
14 Bus Bar Module 16 Resin Board 18 Relay Board 30 Lead Pin Integrated Bus Bar 42, 44 Engaging Claw 50 Battery ECU
56 Fuse 58 Breaker 60 PDU
62 Motor 64 Down converter

Claims (1)

複数の単位電池を直列に接続して構成される電池モジュールを電池収納箱内に複数並列配置し、各前記電池モジュールを直列接続した組電池の電源制御装置であって、
前記組電池及び各前記電池モジュールの電圧を制御する電池制御ユニットと、
前記単位電池と前記電池制御ユニットの間に設けられ、隣接する前記単位電池の正極と負極とを弾性接続する複数のバスバーを有する複数のバスバーモジュールと、
各前記バスバーモジュールと前記電池制御ユニットの間に設けられた中継基板と、
を具備し、
各前記バスバーは、前記中継基板接続用のリードピンを一体に形成したリードピン一体型バスバーから構成される
ことを特徴とする組電池の電源制御装置。
A plurality of unit batteries of the battery module formed by connecting in series a plurality of parallel arrangement in the battery storage box, a power supply control apparatus of an assembled battery of each of said battery modules are connected in series,
A battery control unit for controlling the battery pack and voltages of each of the battery modules,
Provided between the battery control unit and each of the unit cells, a plurality of bus bar module having a plurality of bus bars for resiliently connecting the positive electrode and the negative electrode of said unit cells adjacent
A relay board provided between each of the bus bar modules and the battery control unit;
Comprising
Each of the bus bars is composed of a lead pin integrated bus bar in which the lead pins for connecting the relay board are integrally formed .
JP2008137651A 2008-05-27 2008-05-27 Battery control device for battery pack Expired - Fee Related JP5285959B2 (en)

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