JP6292377B2 - Battery cell fixing device - Google Patents

Battery cell fixing device Download PDF

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JP6292377B2
JP6292377B2 JP2013249298A JP2013249298A JP6292377B2 JP 6292377 B2 JP6292377 B2 JP 6292377B2 JP 2013249298 A JP2013249298 A JP 2013249298A JP 2013249298 A JP2013249298 A JP 2013249298A JP 6292377 B2 JP6292377 B2 JP 6292377B2
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battery cell
tray
stay
fixing
battery
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JP2015106531A (en
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鈴木 隆史
隆史 鈴木
鈴木 浩恭
浩恭 鈴木
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三菱自動車工業株式会社
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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
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Description

本発明は、バッテリセルをバッテリパックのトレイに固定するバッテリセル固定装置に関する。   The present invention relates to a battery cell fixing device that fixes a battery cell to a tray of a battery pack.

電気自動車やハイブリッド車などの車両の多くは、車体の下部にバッテリパックを取り付けて、バッテリパック内に収めたバッテリセルの電力を走行用モータなどへ供給している。
こうしたバッテリパックに内蔵されるバッテリセルは、モジュールケースや保持カバーやバスバーなどを用いて、複数個、並列に束にしてモジュール化している。そして、このモジュール化されたバッテリセルを、別途、固定構造を用いて、バッテリパックを構成するトレイに固定し、バッテリパック内に収める構造としている(特許文献1〜3などを参照)。
Many vehicles such as electric vehicles and hybrid vehicles have a battery pack attached to the lower part of the vehicle body, and supply the electric power of the battery cells stored in the battery pack to a driving motor or the like.
The battery cells built in such a battery pack are modularized by bundling a plurality of battery cells in parallel using a module case, a holding cover, a bus bar, or the like. Then, the modularized battery cell is separately fixed to a tray constituting the battery pack using a fixing structure, and is stored in the battery pack (see Patent Documents 1 to 3, etc.).

特開2012−101663号公報JP 2012-101663 A 特開2010−160931号公報JP 2010-160931 A 特開2010− 80355号公報JP 2010-80355 A

ところで、車載のバッテリパックは、小形、軽量であることが望まれる。
しかし、バッテリセルは、トレイに固定するための固定構造以外に、モジュールケース、保持カバーやバスバーなどモジュール化を行うための各種部材が組み付くので、複雑となり、かなり重量もかさむ。このため、バッテリパックは複雑化、さらには重量の増加を招いている。
By the way, an in-vehicle battery pack is desired to be small and lightweight.
However, since the battery cell is assembled with various members for modularization such as a module case, a holding cover, and a bus bar in addition to the fixing structure for fixing to the tray, the battery cell is complicated and considerably heavy. For this reason, the battery pack is complicated and further increases in weight.

そこで、本発明の目的は、簡単な構造で、複数のバッテリセルがバッテリパックのトレイに取り付けられるバッテリセル固定装置を提供する。   Accordingly, an object of the present invention is to provide a battery cell fixing device in which a plurality of battery cells are attached to a tray of a battery pack with a simple structure.

請求項1に記載の発明のバッテリセル固定装置は、バッテリパックを形成するトレイと、トレイの内部に当該トレイとは反対側に端子を向けて載置される複数のバッテリセルと、複数のバッテリセルの端子間を連接するバスバーと、バッテリセルを前記トレイに固定するステー部材とを具備し、ステー部材は、一端部が端子にバスバーと共に固定され、他端部がトレイに固定されるものとした。   According to a first aspect of the present invention, there is provided a battery cell fixing device including a tray forming a battery pack, a plurality of battery cells placed inside the tray with terminals facing away from the tray, and a plurality of batteries. A bus bar that connects between the terminals of the cell, and a stay member that fixes the battery cell to the tray, the stay member having one end fixed to the terminal together with the bus bar and the other end fixed to the tray; did.

請求項2に記載の発明のバッテリセル固定装置は、バスバーとステー部材を端子に固定する固定部材を更に具備し、バスバーは、第1の孔部が形成され、ステー部材は、一端部に第2の孔部が形成され、固定部材は、バスバーの第1の孔部とステー部材の第2の孔部とに端子を挿通させて固定するものとした。
請求項3に記載の発明のバッテリセル固定装置は、トレイは、バッテリセルが載置されるトレイの内部空間を仕切る仕切り部を有し、ステー部材の他端部は、仕切り部に固定されるものとした。
According to a second aspect of the present invention, the battery cell fixing device further includes a fixing member for fixing the bus bar and the stay member to the terminal. The bus bar is formed with a first hole, and the stay member is formed at one end. Two holes are formed, and the fixing member is fixed by inserting a terminal through the first hole of the bus bar and the second hole of the stay member.
In the battery cell fixing device according to the third aspect of the present invention, the tray has a partition portion that partitions the internal space of the tray on which the battery cell is placed, and the other end portion of the stay member is fixed to the partition portion. It was supposed to be.

請求項4に記載の発明のバッテリセル固定装置は、ステー部材は絶縁性を有し、ステー部材の一端部には、バスバーの露出部を覆うカバー部が形成され、固定部材は、絶縁性を有すると共に端子を覆うように固定されるものとした。
請求項5に記載の発明のバッテリセル固定装置は、ステー部材は、一端部と他端部との間にバッテリセルの側方を通る延伸部を有し、延伸部は湾曲しているものとした。
In the battery cell fixing device according to the fourth aspect of the invention, the stay member has an insulating property, a cover portion that covers the exposed portion of the bus bar is formed at one end of the stay member, and the fixing member has an insulating property. And fixed so as to cover the terminal.
In the battery cell fixing device according to claim 5, the stay member has an extending portion passing through the side of the battery cell between the one end portion and the other end portion, and the extending portion is curved. did.

請求項6に記載の発明のバッテリセル固定装置は、ステー部材を通じてバッテリセルと熱交換可能とした熱交換部を有しているものとした。
請求項7に記載の発明のバッテリセル固定装置は、熱交換部は、トレイの外面にヒートシンクを設けて構成されるものとした。
請求項8に記載の発明のバッテリセル固定装置は、熱交換部は、トレイの仕切り部に、熱媒が流通する熱媒流路を設けて構成されるものとした。
The battery cell fixing device of the invention described in claim 6 has a heat exchanging portion that can exchange heat with the battery cell through the stay member.
In the battery cell fixing device according to the seventh aspect of the present invention, the heat exchange part is configured by providing a heat sink on the outer surface of the tray.
In the battery cell fixing device according to an eighth aspect of the present invention, the heat exchange part is configured by providing a heat medium flow path through which the heat medium flows in the partition part of the tray.

請求項1の発明によれば、複数のバッテリセルは、バスバーと共に端子に固定されるステー部材によって、バッテリパックのトレイに固定される。つまり、ステー部材は、端子を利用して、バッテリセルをトレイに固定するので、バッテリセルの固定は簡素な構造ですむ。
請求項2の発明によれば、ステー部材の一端部の固定は、バスバー、ステー部材の端部に端子が挿通する孔部を形成し、固定部材で、各孔部を挿通した端子にバスバー、ステー部材を固定するという、簡単な共締め構造ですむ。
According to the invention of claim 1, the plurality of battery cells are fixed to the tray of the battery pack by the stay member fixed to the terminal together with the bus bar. In other words, the stay member uses the terminal to fix the battery cell to the tray, so that the battery cell can be fixed simply.
According to the invention of claim 2, the fixing of the one end portion of the stay member includes forming a hole portion through which the terminal is inserted into the end portion of the bus bar and the stay member, and the bus bar to the terminal through which each hole portion is inserted with the fixing member. A simple co-tightening structure that fixes the stay members is sufficient.

請求項3の発明によれば、ステー部材の他端部は、トレイの内部空間を仕切る仕切り部に固定されるので、ステー部材を固定するスペースを、別途トレイに確保せずにすむ。
請求項4の発明によれば、ステー部材が絶縁性を有するだけでなく、バスバーや端子の外部に露出した各部分が、外部に晒されないので、バッテリセルの組付時、取外し時やメンテナンス時などの際、作業者が電流の流れる部分に触れずに作業ができる。
According to the third aspect of the present invention, the other end of the stay member is fixed to the partition that partitions the internal space of the tray, so that a space for fixing the stay member need not be secured in the tray.
According to the invention of claim 4, not only the stay member has an insulating property, but also each part exposed to the outside of the bus bar and the terminal is not exposed to the outside, so that the battery cell can be assembled, removed, or maintained. In such a case, the operator can work without touching the current flowing portion.

請求項5の発明によれば、ステー部材の、バッテリセル側方を通る延伸部の湾曲がもたらす弾性力により、バッテリセルがずれないようバッテリセルを左右方向から押し付けたり、バッテリセルを上方からトレイに押え付けたりすることができる。これにより、常にバッテリセルは、安定した姿勢に保たれる。
請求項6の発明によれば、ステー部材を活用して、バッテリセルの冷却や加温ができる。
According to the invention of claim 5, the battery cell is pressed from the left or right direction so that the battery cell is not displaced by the elastic force caused by the curvature of the extending portion of the stay member passing through the side of the battery cell, or the battery cell is Can be pressed against. Thereby, the battery cell is always kept in a stable posture.
According to the invention of claim 6, the battery cell can be cooled and heated by utilizing the stay member.

請求項7の発明によれば、特にバッテリセルの冷却は、トレイの外面を流通する走行風を用いて冷却できる(空冷)。しかも、トレイにヒートシンクを設けるという簡単な構造ですむ。
請求項8の発明によれば、バッテリセルの冷却や加温は、熱媒流路を流通する熱媒により行われる。熱媒を用いるため、バッテリセルを効率よく、冷却したり加温したりすることができる。しかも、トレイの仕切り部に熱媒流路を形成することにより、別途、熱媒流路を形成するためのスペースをトレイ上に確保せずにすみ、バッテリセルの周囲に影響を与えずにすむ。
According to the seventh aspect of the present invention, the battery cell can be cooled by using the traveling air flowing through the outer surface of the tray (air cooling). Moreover, a simple structure in which a heat sink is provided on the tray is sufficient.
According to the invention of claim 8, the battery cell is cooled and heated by the heat medium flowing through the heat medium flow path. Since the heat medium is used, the battery cell can be efficiently cooled or heated. In addition, by forming the heat medium flow path in the tray partition, it is possible to avoid separately securing a space for forming the heat medium flow path on the tray and not affecting the surroundings of the battery cells. .

本発明の第1の実施形態に係るバッテリパックを搭載した車両を示す斜視図。The perspective view which shows the vehicle carrying the battery pack which concerns on the 1st Embodiment of this invention. 同バッテリパックを、同パック内に収めたバッテリセルと共に示す一部分解した斜視図。The partially exploded perspective view which shows the battery pack with the battery cell accommodated in the pack. 図2中のA−A線に沿う断面図。Sectional drawing in alignment with the AA in FIG. バッテリセルをトレイに固定する構造を示す分解斜視図。The disassembled perspective view which shows the structure which fixes a battery cell to a tray. 本発明の第2の実施形態の要部となるステー部材を示す斜視図。The perspective view which shows the stay member used as the principal part of the 2nd Embodiment of this invention. 本発明の第3の実施形態の要部となるステー部材を示す斜視図。The perspective view which shows the stay member used as the principal part of the 3rd Embodiment of this invention. 本発明の第4の実施形態の要部となる空冷式の熱交換部の構造を示す斜視図。The perspective view which shows the structure of the air-cooling type heat exchange part used as the principal part of the 4th Embodiment of this invention. 本発明の第5の実施形態の要部となる熱媒式の熱交換部の構造を示す斜視図。The perspective view which shows the structure of the heat-medium type heat exchange part used as the principal part of the 5th Embodiment of this invention. 図8中のB−B線に沿う断面図。Sectional drawing which follows the BB line in FIG.

以下、本発明を図1から図4に示す第1の実施形態にもとづいて説明する。
図1は、電気自動車やハイブリッド車など、バッテリパックを搭載した自動車(車両)の一部を示し、図2は同バッテリパック内のバッテリセルを示し、図3および図4は、同バッテリセルを固定する固定構造を示している。
図1中1は、自動車の車体、3は、例えば車体1のフロア(図示しない)の下部中央に据付けられたバッテリパックをそれぞれ示している。
Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
FIG. 1 shows a part of a vehicle (vehicle) equipped with a battery pack such as an electric vehicle or a hybrid vehicle, FIG. 2 shows a battery cell in the battery pack, and FIGS. 3 and 4 show the battery cell. The fixing structure to fix is shown.
In FIG. 1, reference numeral 1 denotes an automobile body, and 3 denotes, for example, a battery pack installed at a lower center of a floor (not shown) of the vehicle body 1.

バッテリパック3は、車両前後方向に延びるトレイ5aと、同トレイ5aの上側を水密に覆うカバー5bとで構成される細長のケーシング5内に、多数のバッテリセル、例えば多数の箱形のバッテリセル11を収めて構成される。
すなわち、バッテリセル11は、例えば図2〜図4に示されるように外形が直方体形をなす本体12を備え、本体12の上面両端側には正極端子12aと負極端子12b(いずれも本願の端子に相当)を有した箱形をなしている。このバッテリセル11が、図2および図4に示されるように示されるようにモジュール単位、例えば同セル11が4個、隣接して並んだ束の状態を1モジュールとして、トレイ5aの内面に載置されている。ここではバッテリセル11は、正極端子12a,負極端子12bがトレイ5aとは反対側に向く姿勢で、モジュール単位で車両前後方向に二列に載置されている。そのため、トレイ5aの内面には、車幅方向に並ぶ各バッテリセル11の両側を位置決めるための一対の段部7(本願の仕切り部に相当)が、左右(車幅)方向に沿って形成され、バッテリセル11が載置されるトレイ5の内部空間を仕切っている。
The battery pack 3 includes a large number of battery cells, for example, a large number of box-shaped battery cells, in an elongated casing 5 that is configured by a tray 5a extending in the vehicle longitudinal direction and a cover 5b that covers the upper side of the tray 5a in a watertight manner. 11 is configured.
That is, the battery cell 11 includes a main body 12 whose outer shape is a rectangular parallelepiped as shown in FIGS. 2 to 4, for example, and a positive electrode terminal 12 a and a negative electrode terminal 12 b (both of which are terminals of the present application) Is equivalent to a box shape. As shown in FIGS. 2 and 4, the battery cell 11 is mounted on the inner surface of the tray 5 a as a module unit, for example, a bundle of four cells 11 adjacent to each other. Is placed. Here, the battery cells 11 are mounted in two rows in the vehicle front-rear direction in a posture in which the positive electrode terminal 12a and the negative electrode terminal 12b face the opposite side of the tray 5a. Therefore, on the inner surface of the tray 5a, a pair of step portions 7 (corresponding to the partition portions of the present application) for positioning both sides of the battery cells 11 arranged in the vehicle width direction are formed along the left and right (vehicle width) direction. Thus, the internal space of the tray 5 on which the battery cells 11 are placed is partitioned.

この仕切られた段部7、7間に、モジュール単位でバッテリセル11が、ステー部材15を用いて、直接、トレイ5aの内面に固定されている(図2〜4)。ここでは、バッテリセル11(モジュール単位)は、左右一対のステー部材15を用いたバッテリセル固定装置17(以下、単に固定装置17と称す)にて、直接、トレイ5aの内面に固定されている。図2〜図4には、この固定装置17の各部の構造が示されている。   Between the partitioned step portions 7 and 7, the battery cell 11 is fixed directly to the inner surface of the tray 5a using a stay member 15 (FIGS. 2 to 4). Here, the battery cell 11 (module unit) is directly fixed to the inner surface of the tray 5a by a battery cell fixing device 17 (hereinafter simply referred to as a fixing device 17) using a pair of left and right stay members 15. . 2 to 4 show the structure of each part of the fixing device 17.

モジュール単位で並んだバッテリセル11について説明を加えると、バッテリセル11は、正極端子12a,負極端子12bを互い違いに配置しながら、並行に隣接して配置されている。隣り合う正極端子12aと負極端子12b間は、それぞれ帯板状のバスバー9にて連接される(図4)。具体的には、バスバー9の各端部には、正・負極端子12a,12bと挿通可能な通孔9a(本願の第1の孔部に相当)が形成されていて、隣合う一方のバッテリセル11の正極端子12aに片側の通孔9aを挿通し、隣合う他方のバッテリセル11の負極端子12bに反対側の通孔9aを挿通させることにより連接が行われる。
このバスバー9によるバッテリセル11の連接により、バッテリセル11、11間を直列につなげている。ちなみに正極端子12a、負極端子12bは、いずれも外周面にめねじ部13を有する円柱形の端子部材で形成されている。
When the battery cells 11 arranged in units of modules are described further, the battery cells 11 are arranged adjacent to each other in parallel while the positive terminals 12a and the negative terminals 12b are arranged alternately. Adjacent positive electrode terminal 12a and negative electrode terminal 12b are connected to each other by a strip-like bus bar 9 (FIG. 4). Specifically, each end portion of the bus bar 9 is formed with a through hole 9a (corresponding to the first hole portion of the present application) through which the positive and negative electrode terminals 12a and 12b can be inserted. The connection is performed by inserting the through hole 9a on one side into the positive electrode terminal 12a of the cell 11 and inserting the through hole 9a on the opposite side into the negative electrode terminal 12b of the other adjacent battery cell 11.
The battery cells 11 and 11 are connected in series by the connection of the battery cells 11 by the bus bar 9. Incidentally, each of the positive electrode terminal 12a and the negative electrode terminal 12b is formed of a cylindrical terminal member having a female thread portion 13 on the outer peripheral surface.

固定装置17の説明に戻ると、例えば一対のステー部材15は、いずれも図3および図4に示されるようにバッテリセル11の両側に組み合わさる部品で、セラミックスなどの絶縁部材から形成され、絶縁性を有する。双方共、同じ構造なので、片側のステー部材15について説明すると、図中19は、モジュール単位のバッテリセル11のうち、例えば前後の二個所(例えば最前部と最後部)に配置される複数の支柱部19(本願の延伸部に相当)を有している。この支柱部19は、バスバー9の上面から段部7の上面へ至るまで合わせて延ばした帯形の延伸部分を有して形成され、バッテリセル11の側方を通る。各支柱部19の下端部には、側方(バッテリセル11から離れる方向)へL形に張り出る固定座20(本願のステー部材の他端部に相当)が設けられている。各支柱部19の上端部には、両支柱部19間に渡り、固定座20とは反対の向き(バッテリセル11と接近する方向)へ逆L形に張り出る固定座22(本願のステー部材の一端部に相当)が設けられている。固定座20には、固定用の通孔20aが形成される。固定座22は、バッテリセル列に沿って延びる帯形をなしていて、座面には、バスバー9を貫通した各端子12a,12bが通る通孔22aが形成されている。   Returning to the description of the fixing device 17, for example, the pair of stay members 15 are parts combined on both sides of the battery cell 11 as shown in FIGS. 3 and 4, and are formed from an insulating member such as ceramics. Have sex. Since both have the same structure, the stay member 15 on one side will be described. In the figure, reference numeral 19 denotes a plurality of support columns disposed at, for example, two front and rear positions (for example, the front and rearmost portions) of the battery cell 11 in module units. It has a portion 19 (corresponding to the stretched portion of the present application). The support column 19 is formed to have a strip-shaped extending portion that extends from the upper surface of the bus bar 9 to the upper surface of the stepped portion 7, and passes through the side of the battery cell 11. A fixing seat 20 (corresponding to the other end portion of the stay member of the present application) is provided at the lower end portion of each column portion 19 so as to project in an L shape laterally (in a direction away from the battery cell 11). A fixed seat 22 (a stay member of the present application) that protrudes in an inverted L shape in the opposite direction to the fixed seat 20 (in the direction approaching the battery cell 11) across the support column 19 at the upper end of each support column 19. Corresponding to one end of the). A fixed through hole 20 a is formed in the fixed seat 20. The fixed seat 22 has a band shape extending along the battery cell row, and a through hole 22a through which each terminal 12a, 12b penetrating the bus bar 9 passes is formed on the seat surface.

これにより、バッテリセル11は、例えば図4に示されるようにモジュール単位で複数個、ここでは4個、並行に配置し、隣り合う各正極端子12aと負極端子12b間をバスバー9にて連接してから、バッテリセル列の両側に、一対のステー部材15を組み付け、複数のバッテリセル11を束にする。その後、バッテリセル11を、トレイ5aの段部7間に配置し、各固定座20を各段部7の上面に固定すると、バッテリセル11が、モジュール単位で、トレイ5aに直接、固定される。   Thus, for example, as shown in FIG. 4, a plurality of battery cells 11 are arranged in parallel, for example, four in this case, and the adjacent positive electrode terminals 12 a and negative electrode terminals 12 b are connected by the bus bar 9. Then, a pair of stay members 15 are assembled on both sides of the battery cell row, and a plurality of battery cells 11 are bundled. After that, when the battery cells 11 are arranged between the step portions 7 of the tray 5a and each fixing seat 20 is fixed to the upper surface of each step portion 7, the battery cells 11 are directly fixed to the tray 5a in units of modules. .

すなわち、モジュール単位でバッテリセル11をトレイ5aに取り付けるときは、並行に配置された各バッテリセル11の隣合う正極端子12aと負極端子12bに、各バスバー9の各通孔9aを挿通して、各バスバー9でそれぞれ端子12a,12b間を連接する。この後、例えばそれぞれステー部材15の支柱部19を、バッテリセル11の外面に沿わせ、ステー部材15の各固定座22を、バッテリセル11の各端子12a,12bを覆うように配置する。この際、バスバー9を貫通した各端子12a,12bの端部は、固定座22の各通孔22aに挿通する。これにより、固定座22は、バスバー9と重なり合いながらバッテリセル11の上部に載る。その後、固定座22の各通孔22aを貫通した正極端子12aおよび負極端子12bの端部に、固定部材、例えば袋ナット25をねじ込む。すると、袋ナット25で、固定座22がバスバー9と共に各端子12a,12bに固定される(共締め)。これにより、図2中に示されるように、一対のステー部材15が各バッテリセル11に組み付き、複数のバッテリセル11は束、すなわちモジュール単位になる。   That is, when attaching the battery cells 11 to the tray 5a in module units, the through holes 9a of the bus bars 9 are inserted into the adjacent positive electrode terminals 12a and negative electrode terminals 12b of the battery cells 11 arranged in parallel, Each bus bar 9 connects the terminals 12a and 12b. Thereafter, for example, the support column 19 of the stay member 15 is placed along the outer surface of the battery cell 11, and the fixed seats 22 of the stay member 15 are arranged so as to cover the terminals 12 a and 12 b of the battery cell 11. At this time, the end portions of the terminals 12 a and 12 b penetrating the bus bar 9 are inserted into the through holes 22 a of the fixed seat 22. Thereby, the fixed seat 22 is placed on the upper part of the battery cell 11 while overlapping with the bus bar 9. Thereafter, a fixing member, for example, a cap nut 25 is screwed into the end portions of the positive terminal 12 a and the negative terminal 12 b that pass through the through holes 22 a of the fixing seat 22. Then, the fixing seat 22 is fixed to the terminals 12a and 12b together with the bus bar 9 by the cap nut 25 (joint tightening). Thereby, as shown in FIG. 2, the pair of stay members 15 is assembled to each battery cell 11, and the plurality of battery cells 11 become a bundle, that is, a module unit.

その後、束となったバッテリセル11の下部を、バッテリセル11が設置されるトレイ5a部分、すなわちトレイ5aの段部7,7間に挿入して、バッテリセル11をトレイ5aに載せ、段部7の上面に支柱部19の固定座20を配置する。そして、各固定座20を締結部材、例えば固定ボルト27を用いて、各段部7の上面にボルト止めすればよい(図2、図3)。   Thereafter, the lower part of the bundled battery cells 11 is inserted between the tray 5a portion where the battery cells 11 are installed, that is, between the steps 7 and 7 of the tray 5a, and the battery cells 11 are placed on the tray 5a. The fixed seat 20 of the support column 19 is disposed on the upper surface of the member 7. And each fixed seat 20 should just be bolted to the upper surface of each step part 7 using a fastening member, for example, the fixing bolt 27 (FIG. 2, FIG. 3).

詳しくは、バッテリセル11を段部7,7間に挿入する際、固定座20の通孔22aを、例えば予め段部7の上面の所定位置に形成されているねじ孔7a(図2)と合わせつつ、段部7の上面に位置決める。その後、固定ボルト27を固定座20を通してねじ孔7aへねじ込むと、段部7,7間のバッテリセル11は、ステー部材15の固定座20とトレイ5aの内面との間で挟み付けられる。これにより、バッテリセル11は、トレイ5aに強固に固定、すなわち上下左右にずれないように固定される。   Specifically, when the battery cell 11 is inserted between the step portions 7 and 7, the through hole 22a of the fixed seat 20 is, for example, a screw hole 7a (FIG. 2) formed in advance at a predetermined position on the upper surface of the step portion 7. While aligning, positioning is performed on the upper surface of the stepped portion 7. Thereafter, when the fixing bolt 27 is screwed into the screw hole 7a through the fixing seat 20, the battery cell 11 between the step portions 7 and 7 is sandwiched between the fixing seat 20 of the stay member 15 and the inner surface of the tray 5a. Thereby, the battery cell 11 is firmly fixed to the tray 5a, that is, fixed so as not to be displaced vertically and horizontally.

むろん、ステー部材15は、トレイ5aに載置する前に、束となるバッテリセル11に組み付けておくのではなく、先に段部7,7間にバッテリセル11を配置して、バスバー9の組み付けにより束にしてから、一対のステー部材15をバッテリセル列の両側に配置して、バッテリセル11側の固定座22を、袋ナット25でバッテリセル11の各端子12a,12bに固定し、固定座20を、固定ボルト27により段部7に固定してもよく、どのような順序でも構わない。   Of course, the stay member 15 is not assembled to the battery cell 11 to be bundled before being placed on the tray 5a, but the battery cell 11 is first disposed between the stepped portions 7 and 7 so that the bus bar 9 After being bundled by assembly, a pair of stay members 15 are arranged on both sides of the battery cell row, and the fixing seat 22 on the battery cell 11 side is fixed to each terminal 12a, 12b of the battery cell 11 with a cap nut 25, The fixing seat 20 may be fixed to the stepped portion 7 by the fixing bolt 27, and any order may be used.

特にステー部材15の固定座22には、バスバー9の露出部分が外部に露出しないよう、カバー部30が形成されている(図2〜図4)。すなわちカバー部30は、バスバー9全体を覆い隠す外形に設定したり、固定座22の先端部に、固定座22とバッテリセル11の上面との隙間α(図3)を覆うフランジ部22bを設けたりする構造などから形成されている。これにより、外側からバスバー9に触れるおそれのあるバスバー9の露出部分を遮っている。また袋ナット25は、絶縁性を有した袋ナット(本願の絶縁性を有する固定部材に相当)が用いられ、同袋ナット25で、正・負極端子12a,12bの端部を覆いながら、バスバー9、固定座22をバッテリセル11に共締め固定することで、正・負極端子12a,12bの端部が外部に露出しないようにしてある。ちなみに袋ナット25は、例えば袋ナット25自体を絶縁性に優れる合成樹脂製の部材から形成したり、通常の袋ナット25の表面に合成樹脂製のナットカバーを被せたりすることで、絶縁性を確保している(本願の絶縁性を有する固定部材に相当)。   In particular, a cover 30 is formed on the fixed seat 22 of the stay member 15 so that the exposed portion of the bus bar 9 is not exposed to the outside (FIGS. 2 to 4). That is, the cover portion 30 is set to have an outer shape that covers the entire bus bar 9, or a flange portion 22 b that covers the gap α (FIG. 3) between the fixed seat 22 and the upper surface of the battery cell 11 is provided at the distal end portion of the fixed seat 22. It is formed from the structure etc. Thereby, the exposed part of the bus bar 9 which may touch the bus bar 9 from the outside is blocked. In addition, as the cap nut 25, an insulating cap nut (corresponding to the insulating fixing member of the present application) is used, and the bus bar 25 covers the ends of the positive and negative terminals 12a, 12b while 9. The fixing seat 22 is fastened and fixed to the battery cell 11 so that the ends of the positive and negative terminals 12a and 12b are not exposed to the outside. By the way, the cap nut 25 is made of, for example, a synthetic resin member having excellent insulating properties, or by covering the surface of the normal cap nut 25 with a synthetic resin nut cover. Ensured (equivalent to the insulating fixing member of the present application).

このように複数のバッテリセル11は、ステー部材15を用いた固定装置17により、モジュール化を進めながら、トレイ5aに、直接、固定できる。特にバッテリセル11のトレイ5aへの設置は、バスバー9と共に端子12a,12bに固定されるステー部材15を用いるだけでよいから、従来のようにモジュール化のために必要とされていた各種部材を削減できる。   As described above, the plurality of battery cells 11 can be directly fixed to the tray 5a while being modularized by the fixing device 17 using the stay member 15. In particular, the battery cell 11 can be installed on the tray 5a only by using the stay member 15 fixed to the terminals 12a and 12b together with the bus bar 9, so that various members required for modularization as in the prior art can be used. Can be reduced.

それ故、簡単な構造で、複数のバッテリセル11をトレイ5aに取り付けることができる。これにより、トレイ5aに搭載される重量が低減され、バッテリパック3の軽量化が図れる。
しかも、ステー部材15の、バスバー9と共にバッテリセル11の正・負極端子12a,12bを固定するという、正極端子12a、負極端子12bを利用した共締め構造により、バッテリセル11の固定は、簡素な構造ですむ。特に共締め構造には、バスバー9、固定座22に、端子挿通用の通孔9a,22aを形成し、袋ナット25で、各通孔9a,22を貫通した端子12a,12bに、バスバー9、固定座22を締結する構造を用いたので、簡単な構造ですむ。
Therefore, a plurality of battery cells 11 can be attached to the tray 5a with a simple structure. Thereby, the weight mounted in the tray 5a is reduced and the weight reduction of the battery pack 3 can be achieved.
In addition, the battery cell 11 can be simply fixed by the joint fastening structure using the positive terminal 12a and the negative terminal 12b in which the positive and negative terminals 12a and 12b of the battery cell 11 are fixed together with the bus bar 9 of the stay member 15. The structure is sufficient. In particular, in the joint tightening structure, through holes 9a and 22a for inserting terminals are formed in the bus bar 9 and the fixed seat 22, and the bus bars 9 are connected to the terminals 12a and 12b penetrating the through holes 9a and 22 by the cap nut 25. Since the structure for fastening the fixed seat 22 is used, a simple structure is sufficient.

そのうえ、ステー部材15は、トレイ5aの内部空間を仕切る段部7(仕切り部)に固定したので、ステー部材15を固定するスペースは、別途、トレイ5aに確保せずにすむ。
またステー部材15は、絶縁性を有するだけでなく、ステー部材15の固定座22には、バスバー9の露出した部分、すなわち露出部の外部への露出を防ぐカバー部30が設けられ、固定座22の固定には、正・負極端子12a,12bの露出を防ぐ絶縁性の袋ナット25が用いられるので、電流の通るバスバー9や正・負極端子12a,12bの端部が、外部に晒されないですむ。これにより、バッテリセル11の組付時、取外し時やメンテナンス時などの際、作業者が電流の流れる部分に触れずに作業ができる。
In addition, since the stay member 15 is fixed to the step portion 7 (partition portion) that partitions the internal space of the tray 5a, a space for fixing the stay member 15 need not be secured in the tray 5a.
The stay member 15 is not only insulative, but the fixed seat 22 of the stay member 15 is provided with a cover portion 30 that prevents the exposed portion of the bus bar 9, that is, the exposed portion, from being exposed to the outside. Since the insulating cap nut 25 which prevents exposure of the positive / negative electrode terminals 12a and 12b is used for fixing 22, the bus bar 9 through which the current passes and the ends of the positive / negative electrode terminals 12a and 12b are not exposed to the outside. That's okay. Thus, when the battery cell 11 is assembled, removed, or maintained, the operator can work without touching the portion where the current flows.

図5は、本発明の第2の実施形態を示す。
ステー部材15のバッテリセル11の側方を通る支柱部29(延伸部)に湾曲部、ここではバッテリセル11側が凸となる円弧形の湾曲部29aを形成したものである。
このように湾曲した支柱部29を用いると、図3のようにステー部材15でバッテリセル11をトレイ5aの内面に固定する際、湾曲部29aのもたらす弾性力を利用して、バッテリセル11がずれないよう、バッテリセル11を左右方向から押え付けたり、バッテリセル11を上方からトレイ5aへ押え付けたりすることができる。このため、常に安定した姿勢にバッテリセル11を保つことができる。
FIG. 5 shows a second embodiment of the present invention.
The support member 29 (extending portion) passing through the side of the battery cell 11 of the stay member 15 is formed with a curved portion, here, an arc-shaped curved portion 29a having a convex shape on the battery cell 11 side.
If the support column 29 curved in this way is used, when the battery cell 11 is fixed to the inner surface of the tray 5a by the stay member 15 as shown in FIG. The battery cell 11 can be pressed from the left-right direction or the battery cell 11 can be pressed from the upper side to the tray 5a so as not to shift. For this reason, the battery cell 11 can be always kept in a stable posture.

図6は、本発明の第3の実施形態を示す。
本実施形態は、カバー部30を増加させるために、一対のステー部材15の固定座22の両端部を中継部31を介して一体に連結したものである。このようにすると、一層、バッテリセル11の姿勢は安定する、むろん、第2の実施形態のようにステー部材15を湾曲させてもよい。
FIG. 6 shows a third embodiment of the present invention.
In the present embodiment, in order to increase the cover portion 30, both end portions of the fixed seat 22 of the pair of stay members 15 are integrally connected via the relay portion 31. If it does in this way, the attitude | position of the battery cell 11 will be stabilized further, and, as a matter of course, the stay member 15 may be curved as in the second embodiment.

図7は、本発明の第4の実施形態を示す。
本実施形態は、トレイ5aに、バッテリセル11とステー部材15を通じて、熱交換を可能にした熱交換部35を設けたものである。
具体的には、熱交換部35は、トレイ5aの外気に臨むに下面(外面)に、例えば車両前後方向に延びるフィン形のヒートシンク36を多数設けて、バッテリセル11で生じた熱が、正・負極端子12a,12b、ステー部材15、固定ボルト27、段部7を通じ、ヒートシンク36から外気へ放熱されるようにしたものである(空冷)。
FIG. 7 shows a fourth embodiment of the present invention.
In the present embodiment, a heat exchange part 35 that enables heat exchange through the battery cell 11 and the stay member 15 is provided on the tray 5a.
Specifically, the heat exchanging unit 35 is provided with a large number of fin-shaped heat sinks 36 extending in the vehicle front-rear direction, for example, on the lower surface (outer surface) so as to face the outside air of the tray 5a. The heat is dissipated from the heat sink 36 to the outside air through the negative terminals 12a and 12b, the stay member 15, the fixing bolt 27, and the stepped portion 7 (air cooling).

こうした構造を用いると、ステー部材15を活用して、バッテリセル11の冷却ができる。しかも、トレイ5aの下面(外面)にヒートシンク36を設けるだけの簡単な構造で、トレイ5aの外面を流通する走行風を活用して、バッテリセル11を効果的に冷却することができる。特にステー部材15や段部7やトレイ5aを、熱伝導性の優れた部材から形成すると、さらに効果的にバッテリセル11が冷却できる。   When such a structure is used, the battery cell 11 can be cooled using the stay member 15. In addition, the battery cell 11 can be effectively cooled by utilizing the traveling air flowing through the outer surface of the tray 5a with a simple structure in which the heat sink 36 is simply provided on the lower surface (outer surface) of the tray 5a. In particular, when the stay member 15, the stepped portion 7, and the tray 5 a are formed from members having excellent thermal conductivity, the battery cell 11 can be cooled more effectively.

図8および図9は、本発明の第5の実施形態を示す。
本実施形態は、空気でなく、熱媒を用いた熱交換部45を用いて、効率よくバッテリセル11の冷却が行えるようにしたものである。
具体的には、熱交換部45には、図8および図9に示されるようにトレイ5a、特にバッテリセル11を位置決める段部7の内部に流路46(本願の熱媒流路に相当)を設け、この流路46に、例えば車両用空調装置のエバポレータ(図示しない)で冷却された冷水(本願の熱媒に相当)を導入させるための入口部47や再びエバポレータへ戻すための出口部48を設けて、バッテリセル11の熱を、流路46を流れる冷水へ放熱するようにしたものである。
8 and 9 show a fifth embodiment of the present invention.
In the present embodiment, the battery cell 11 can be efficiently cooled using the heat exchanging unit 45 using a heat medium instead of air.
Specifically, as shown in FIGS. 8 and 9, the heat exchanging portion 45 has a flow path 46 (corresponding to the heat medium flow path of the present application) inside the tray 5 a, particularly the stepped portion 7 for positioning the battery cell 11. ) And an inlet 47 for introducing cold water (corresponding to the heating medium of the present application) cooled by an evaporator (not shown) of a vehicle air conditioner, or an outlet for returning to the evaporator again. A portion 48 is provided to dissipate the heat of the battery cell 11 to the cold water flowing through the flow path 46.

このようにトレイ5aに流路46を設けて、流路46を流れる冷水で冷却すると、バッテリセル11を効率よく、冷却することができる。特にバッテリセル11を位置決めるための段部7内に流路46を形成すると、別途、流路を形成するためのスペースをトレイ5a上に確保せずにすむので、バッテリセル11の周囲に影響を与えることはない。
特に入口部47や出口部48を、コンデンサやヒーター部などの熱源部に接続すると、極寒時などでは、流路46を流れる温水(本願の熱媒に相当)によって、バッテリセル11を加温することもできる。
Thus, if the flow path 46 is provided in the tray 5a and it cools with the cold water which flows through the flow path 46, the battery cell 11 can be cooled efficiently. In particular, when the flow path 46 is formed in the stepped portion 7 for positioning the battery cell 11, it is not necessary to separately secure a space for forming the flow path on the tray 5 a, so that the periphery of the battery cell 11 is affected. Never give.
In particular, when the inlet portion 47 and the outlet portion 48 are connected to a heat source portion such as a condenser or a heater portion, the battery cell 11 is heated by hot water (corresponding to the heating medium of the present application) flowing through the flow path 46 in extreme cold. You can also.

但し、上述した第2〜5の実施形態において、第1の実施形態と同じ部分には、同一符号を付してその説明を省略した。
なお、本発明は、上述した一実施形態に限定されるものではなく、本発明の主旨を逸脱しない範囲内で種々可変して実施しても構わない。例えば上述した実施形態では、本発明を、端子間を直列に接続するバッテリセルに適用したが、これに限らず、端子間を並列に接続するバッテリセルに適用してもよい。また、例えば上述した実施形態では、ステー部材を、一例として最前部から最後部までの複数のバッテリセルに跨った形状として説明したが、これに限られず、ステー部材を、一つのバッテリセルの幅内に収まる形状としてもよい。そして、このように形成されたステー部材を複数用いて、一端側を複数のバッテリセルのうち全ての端子、もしくは複数のバッテリセルのうちのいくつかの端子にバスバーと共に固定し、他端側をトレイに固定するようにしてもよい。このような構成であっても、端子を利用して、ステー部材でバッテリセルをトレイに固定できるので、バッテリセルの固定は簡素な構造ですむ。
However, in the second to fifth embodiments described above, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
Note that the present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the present invention is applied to a battery cell in which terminals are connected in series. However, the present invention is not limited thereto, and may be applied to a battery cell in which terminals are connected in parallel. Further, for example, in the embodiment described above, the stay member has been described as a shape straddling a plurality of battery cells from the frontmost part to the rearmost part as an example. However, the present invention is not limited to this, and the stay member is defined as the width of one battery cell. It is good also as a shape settled in. And by using a plurality of stay members formed in this way, one end side is fixed to all terminals of the plurality of battery cells or some terminals of the plurality of battery cells together with the bus bar, and the other end side is fixed. You may make it fix to a tray. Even in such a configuration, since the battery cell can be fixed to the tray by the stay member using the terminal, the battery cell can be fixed simply.

3 バッテリパック
5a トレイ
9 バスバー
11 バッテリセル
12a、12b 正極端子,負極端子(端子)
15 ステー部材
20 固定座(ステー部材の他端部)
22 固定座(ステー部材の一端部)
3 Battery pack 5a Tray 9 Bus bar 11 Battery cell 12a, 12b Positive terminal, negative terminal (terminal)
15 Stay member 20 Fixed seat (the other end of the stay member)
22 Fixed seat (one end of stay member)

Claims (8)

  1. バッテリパックを形成するトレイと、
    前記トレイの内部に当該トレイとは反対側に端子を向けて載置される複数のバッテリセルと、
    前記複数のバッテリセルの端子間を連接するバスバーと、
    前記バッテリセルを前記トレイに固定するステー部材と、を具備し、
    前記ステー部材は、一端部が前記端子に前記バスバーと共に固定され、他端部が前記トレイに固定される
    バッテリセル固定装置。
    A tray forming a battery pack;
    A plurality of battery cells placed inside the tray with the terminals facing away from the tray; and
    A bus bar connecting the terminals of the plurality of battery cells;
    A stay member for fixing the battery cell to the tray;
    The stay member has one end fixed to the terminal together with the bus bar and the other end fixed to the tray.
  2. 前記バスバーと前記ステー部材を前記端子に固定する固定部材を更に具備し、
    前記バスバーは、第1の孔部が形成され、
    前記ステー部材は、前記一端部に第2の孔部が形成され、
    前記固定部材は、前記バスバーの前記第1の孔部と前記ステー部材の前記第2の孔部とに前記端子を挿通させて固定する
    請求項1に記載のバッテリセル固定装置。
    A fixing member for fixing the bus bar and the stay member to the terminal;
    The bus bar is formed with a first hole,
    The stay member has a second hole formed at the one end,
    The battery cell fixing device according to claim 1, wherein the fixing member is fixed by inserting the terminal through the first hole portion of the bus bar and the second hole portion of the stay member.
  3. 前記トレイは、前記バッテリセルが載置される前記トレイの内部空間を仕切る仕切り部を有し、
    前記ステー部材の前記他端部は、前記仕切り部に固定される
    請求項1または2に記載のバッテリセル固定装置。
    The tray has a partition that partitions the internal space of the tray on which the battery cells are placed,
    The battery cell fixing device according to claim 1, wherein the other end portion of the stay member is fixed to the partition portion.
  4. 前記ステー部材は絶縁性を有し、
    前記ステー部材の前記一端部には、前記バスバーの露出部を覆うカバー部が形成され、
    前記固定部材は、絶縁性を有すると共に前記端子を覆うように固定される
    請求項2に記載のバッテリセル固定装置。
    The stay member has an insulating property,
    A cover portion that covers the exposed portion of the bus bar is formed at the one end portion of the stay member,
    The battery cell fixing device according to claim 2, wherein the fixing member has an insulating property and is fixed so as to cover the terminal.
  5. 前記ステー部材は、前記一端部と前記他端部との間に前記バッテリセルの側方を通る延伸部を有し、
    前記延伸部は、湾曲している
    請求項1からのいずれか一つに記載のバッテリセル固定装置。
    The stay member has an extending portion passing through a side of the battery cell between the one end portion and the other end portion,
    The battery cell fixing device according to any one of claims 1 to 4 , wherein the extending portion is curved.
  6. 前記トレイは、前記ステー部材を通じて前記バッテリセルと熱交換可能とした熱交換部を有している
    請求項1から5のいずれか一つに記載のバッテリセル固定装置。
    The battery cell fixing device according to any one of claims 1 to 5, wherein the tray includes a heat exchanging portion that can exchange heat with the battery cell through the stay member.
  7. 前記熱交換部は、前記トレイの外面にヒートシンクを設けて構成される
    請求項6に記載のバッテリセル固定装置。
    The battery cell fixing device according to claim 6, wherein the heat exchange unit is configured by providing a heat sink on an outer surface of the tray.
  8. 前記トレイは、前記バッテリセルが載置される前記トレイの内部空間を仕切る仕切り部を有し、
    前記熱交換部は、前記トレイの前記仕切り部に、熱媒が流通する熱媒流路を設けて構成される
    請求項6に記載のバッテリセル固定装置。
    The tray has a partition that partitions the internal space of the tray on which the battery cells are placed,
    The heat exchange unit is configured by providing a heat medium flow path through which a heat medium flows in the partition part of the tray.
    The battery cell fixing device according to claim 6 .
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