JP4609006B2 - Battery pack device for electric vehicles - Google Patents

Battery pack device for electric vehicles Download PDF

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JP4609006B2
JP4609006B2 JP2004258478A JP2004258478A JP4609006B2 JP 4609006 B2 JP4609006 B2 JP 4609006B2 JP 2004258478 A JP2004258478 A JP 2004258478A JP 2004258478 A JP2004258478 A JP 2004258478A JP 4609006 B2 JP4609006 B2 JP 4609006B2
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battery pack
floor
vehicle body
unit
fastening member
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JP2006073466A (en
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浩恭 鈴木
良司 種田
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Mitsubishi Motors Corp
Mitsubishi Automotive Engineering Co Ltd
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Mitsubishi Motors Corp
Mitsubishi Automotive Engineering Co Ltd
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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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  • Body Structure For Vehicles (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Battery Mounting, Suspending (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Description

本発明は、電気自動車の駆動に必要な駆動用電力を供給する電気自動車用バッテリパック装置に関する。   The present invention relates to a battery pack device for an electric vehicle that supplies driving power necessary for driving the electric vehicle.

電気自動車の動力系には、車体に搭載されたバッテリパック装置から走行用モータ、さらには各部へ電力を供給するシステムが用いられている。   For a power system of an electric vehicle, a system for supplying electric power from a battery pack device mounted on a vehicle body to a traveling motor and further to each part is used.

こうした動力系を構成するバッテリパック装置には、ケース内に複数の蓄電池を収めてユニット化されたバッテリパック部を車体に組付けた構造が用いられる。   A battery pack device that constitutes such a power system uses a structure in which a battery pack unit that is unitized by housing a plurality of storage batteries in a case is assembled to a vehicle body.

ところで、バッテリパック部は、バッテリパック部単体で取扱う場合、安全性の確保から、電力の入出力を行う端子部へ電流が流れないようにすることが求められる。そのため、バッテリパック部では、別途、外部信号で動作するコンタクタ（常閉式）や手動式の遮断機器など遮断機器で構成される遮断ユニット部を端子部に接続して、バッテリパック部を単独で取扱うときは、遮断ユニットの遮断機能を用いて、蓄電池からの電圧がバッテリパック部の電力供給側や充電側の端子へ印加しないようにしている。   By the way, when the battery pack unit is handled as a single unit, it is required to prevent current from flowing to the terminal unit that inputs and outputs power in order to ensure safety. Therefore, in the battery pack part, the battery pack part is handled separately by connecting the terminal part with a shut-off unit part composed of a shut-off device such as a contactor (normally closed type) that operates with an external signal or a manual shut-off device. In some cases, the shut-off function of the shut-off unit is used to prevent the voltage from the storage battery from being applied to the power supply side or charging side terminal of the battery pack unit.

ところが、こうした遮断ユニット部は使い勝手が悪い。   However, such a shut-off unit is not convenient to use.

そのため、従来、遮断ユニット部は、バッテリパック部の内部に、バッテリパック部の内部機器と一緒に設置するようになった（例えば特許文献１を参照）。
特開平７−１４５６４号公報 Therefore, conventionally, the interruption unit portion has been installed inside the battery pack portion together with the internal devices of the battery pack portion (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 7-14564

ところが、遮断ユニットをバッテリパック部の内部に組付ける構造は、バッテリパック部内部に、遮断ユニットを設置するための設置スペースを確保する都合上、バッテリパック部の内部に収まる蓄電池のレイアウトの変更や、これら蓄電池間をつなぐ接続部材のルートの変更など、大きな変更が余儀なくされることが多い。このため、バッテリパック装置は、遮断ユニットの組付けにより、バッテリパック装置の構造が複雑になりやすい問題があった。   However, the structure for assembling the shut-off unit inside the battery pack unit is to change the layout of the storage battery that fits inside the battery pack unit, for the sake of securing the installation space for installing the shut-off unit inside the battery pack unit. In many cases, a large change such as a change in the route of the connecting member that connects the storage batteries is forced. For this reason, the battery pack device has a problem that the structure of the battery pack device is likely to be complicated due to the assembly of the shut-off unit.

そこで、本発明の目的は、バッテリパック部の大きな変更を伴わずに、遮断ユニットが一体に組み付く電気自動車のバッテリパック装置を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a battery pack device for an electric vehicle in which a shut-off unit is assembled integrally without significant change of the battery pack portion.

請求項１に記載の発明は、上記目的を達成するために、バッテリパック部のケース外面に、遮断ユニットを外付けで設置して、当該遮断ユニットをバッテリパック部と一体にする構成を採用した。   In order to achieve the above object, the invention according to claim 1 employs a configuration in which a shutoff unit is externally installed on the outer surface of the case of the battery pack unit, and the shutoff unit is integrated with the battery pack unit. .

さらに、車体に形成されている各部の既存スペースを活用して、遮断ユニットが外付けされたバッテリパック部が車体に組み付くよう、バッテリパック部は、車体のうち、後席のフロア下に有するフロア下空間に収まるように構成し、遮断ユニット部は、フロア下空間と連通するフロアトンネルの端部分内に収まるように構成した。 Furthermore, the battery pack part is provided below the floor of the rear seat in the vehicle body so that the battery pack part to which the shut-off unit is externally attached is assembled to the vehicle body by utilizing the existing space of each part formed in the vehicle body. It was configured to fit in the space below the floor, and the blocking unit portion was configured to fit in the end portion of the floor tunnel communicating with the space below the floor.

さらに、車体へ加わる衝撃を要因としたバッテリパック部の車体からの脱落が抑えられるよう、バッテリパック部は、車体前後方向前側のパック部分が、軸心方向が車幅方向に向く第１締結部材を介して、フロア下の車体部材に固定可能とし、車体前後方向後側のパック部分が、軸心方向が上下方向に向く第２締結部材を介して、フロア下の車体部材に固定可能な構成とした。さらに、第２締結部材のサイドレールへの固定は、サイドレールの曲がりがもたらす荷重が軸心方向に所定値以上作用すると、第２締結部材が脱落するように設定される。所定値は、前記サイドレールの衝撃吸収を妨げない値に設定される。 Further, the battery pack portion includes a first fastening member in which the pack portion on the front side in the longitudinal direction of the vehicle body is oriented in the vehicle width direction so that the battery pack portion is prevented from dropping off from the vehicle body due to an impact applied to the vehicle body. The vehicle can be fixed to the vehicle body member under the floor, and the pack portion on the rear side in the vehicle longitudinal direction can be fixed to the vehicle body member under the floor via the second fastening member whose axial direction is the vertical direction. It was. Further, the fixing of the second fastening member to the side rail is set such that the second fastening member drops off when a load caused by the bending of the side rail acts in a direction greater than a predetermined value in the axial direction. The predetermined value is set to a value that does not hinder the impact absorption of the side rail.

請求項１に記載の発明によれば、バッテリパック部の内部機器のレイアウトや接続部財のルートが変わるなど、大きな変更を伴わずに、容易に遮断ユニットとバッテリパック部とが一体となったバッテリパック装置を提供することができる。   According to the first aspect of the present invention, the shut-off unit and the battery pack unit can be easily integrated without major changes such as the layout of the internal equipment of the battery pack unit and the route of the connection unit goods changing. A battery pack device can be provided.

請求項２に記載の発明によれば、さらに上記効果に加え、車体に形成されている既存スペースを、そのままバッテリパック装置の設置スペースに活用して、車体にバッテリパック装置全体を組付けることができる。   According to the second aspect of the present invention, in addition to the above effects, the existing space formed in the vehicle body can be used as the installation space for the battery pack device as it is, and the entire battery pack device can be assembled to the vehicle body. it can.

請求項３に記載の発明によれば、さらに上記効果に加え、簡単な固定手法により、衝突時、車体からバッテリパック装置が脱落しにくくでき、安全性の向上が図れる。   According to the third aspect of the present invention, in addition to the above effects, the battery pack device can be prevented from falling off from the vehicle body at the time of collision by a simple fixing method, and safety can be improved.

［一実施形態］
以下、本発明を図１〜図６に示す一実施形態にもとづいて説明する。 [One Embodiment]
Hereinafter, the present invention will be described based on an embodiment shown in FIGS.

図１は電気自動車の一部の平断面を示し、図２は同じく側断面図を示している。同図中１は例えば箱形の車体、２は同車体１の内部に形成された車室空間、３は同空間２のフロア面を形成するフロアパネル、４は同フロアパネル３のフロントフロア部分の左右にそれぞれ設置されたフロントシート（運転席、助手席）、６は同フロアパネル３のリヤ側をフロント側より高い地点に段差させてなるリヤフロア部分、７は同リヤフロア部分６の最前部に設置されたリヤシート、８はリヤフロア部分６の段差した壁部６ａ（縦壁）の車幅方向中央からフロンナパネル３のフロント側へ向って直線状に形成されたフロアトンネル部、９は車体１の前・後両側に組付くタイヤを示す。なお、フロアパネル３の下面には、車体剛性を確保する構造として、車幅方向両側に形成されたタイヤハウス部分３ａ（リヤ側の一部しか図示せず）の近くを通じて車体前後方向に延びる一対のサイドレール１０や、段差した壁部６ａの内面に沿わせながら一対のサイドレール１０間に連結されたクロスメンバ１１（いずれも本願の車体部材に相当）など各種骨格部材が取着してある。   FIG. 1 shows a plan cross section of a part of an electric vehicle, and FIG. 2 shows a side cross sectional view. In the figure, reference numeral 1 denotes, for example, a box-shaped vehicle body, 2 denotes a passenger compartment space formed inside the vehicle body 1, 3 denotes a floor panel forming a floor surface of the space 2, and 4 denotes a front floor portion of the floor panel 3. Front seats (driver's seat and front passenger seat) installed on the left and right sides, 6 is a rear floor portion where the rear side of the floor panel 3 is stepped higher than the front side, and 7 is the frontmost portion of the rear floor portion 6. The installed rear seat, 8 is a floor tunnel portion formed in a straight line from the center in the vehicle width direction of the stepped wall portion 6a (vertical wall) of the rear floor portion 6 toward the front side of the front panel 3, and 9 is a vehicle body 1 The tires assembled on both front and rear sides are shown. In addition, on the lower surface of the floor panel 3, as a structure for ensuring vehicle body rigidity, a pair extending in the longitudinal direction of the vehicle body near the tire house portions 3a (only a part of the rear side is shown) formed on both sides in the vehicle width direction. Various frame members such as a cross member 11 (all corresponding to the body members of the present application) connected between the pair of side rails 10 along the inner surface of the stepped wall portion 6a are attached. .

車体１のうち、段差したリヤフロア部分６で形成されるリヤシート下のフロア下空間１３（エンジン駆動式自動車の車体では、通常、燃料タンクが配置される部位となる場所）には、図１〜図３に示されるように電気自動車用のバッテリパック装置１５が組込まれている。図５にはこのバッテリパック装置１５を車体１に組み込んだ状態が斜視図で示され、図６には同装置１５を車体１から取り外した状態が示されている。   In the vehicle body 1, a floor space 13 below the rear seat formed by the stepped rear floor portion 6 (in a vehicle-driven vehicle body, a place where a fuel tank is usually disposed) is shown in FIGS. As shown in FIG. 3, a battery pack device 15 for an electric vehicle is incorporated. FIG. 5 is a perspective view showing a state in which the battery pack device 15 is incorporated in the vehicle body 1, and FIG. 6 shows a state in which the device 15 is detached from the vehicle body 1.

これら各図を用いてバッテリパック装置１５を説明すると、１６はバッテリパック部である。バッテリパック部１６は、上面が開放した偏平状の上側ケース１７と、下面が開放した偏平状の上側ケース１８とを結合して構成される偏平箱形の密閉ケース１９（本願のケースに相当）を有し、この密閉ケース１９内に複数の蓄電池、例えば複数のLi（リチウム）−ion（イオン）バッテリ２０（以後、単にバッテリ２０という）を密に収めて構成される。このバッテリパック部１６の外形はフロア下空間１３の形状にならわせてある。そして、この形状を利用してバッテリパック部１６の全体がフロア下空間１３内（図６にのみ図示）に収容してある。なお、各バッテリ２０は、大電力を出力可能とするために、いずれも直列に接続してある。   The battery pack device 15 will be described with reference to these drawings. Reference numeral 16 denotes a battery pack unit. The battery pack portion 16 is a flat box-shaped sealed case 19 (corresponding to the case of the present application) formed by combining a flat upper case 17 whose upper surface is open and a flat upper case 18 whose lower surface is open. In the sealed case 19, a plurality of storage batteries, for example, a plurality of Li (ion) batteries 20 (hereinafter simply referred to as the battery 20) are densely housed. The outer shape of the battery pack portion 16 is made to match the shape of the space 13 below the floor. And the whole battery pack part 16 is accommodated in the under floor space 13 (illustrated only in FIG. 6) using this shape. Each battery 20 is connected in series in order to be able to output large power.

またバッテリパック部１６の前部（車体前後方向）中央には、遮断ユニット部としてコンタクタユニット２２が組み付けられている。コンタクタユニット２２は、例えば図５および図６に示されるように下側ケース１８の前壁下段の外面中央から突き出た盤状のベース２３に組み付けてある。さらに同構造を説明すると、ベース２３の最前部には出力用（メイン）の一対の端子部２４が設けられ、側部には充電用の一対の端子部２５が設けられている。これら端子部２４，２５に上記バッテリパック部１６から延びる入出力線（図示しない）が接続され、一対の端子部２４から電気自動車のモータ駆動に求められる大電力が出力されたり、一対の端子部２５から各バッテリ２０の充電に求められる電力が入力される構造にしている。ベース２３の上面には、例えばメインコンタクタ、チャージコンタクタ（外部信号で動作する常開式のリレー機器よりなる：いずれも図示しない）を組み合わせてユニット化したコンタクタ部２７が設置されている。メインコンタクタは、端子部２４とバッテリパック部１６の入出部間をむすぶ通電経路（図示しない）に介装され、チャージコンタクタは、端子部２５とバッテリパック部１６の入出部間をむすぶ通電経路（図示しない）に介装されていて、バッテリパック装置１５を単体で取り扱うときには、各コンタクタの開放動作により、各端子部２４，２５へバッテリ２０の電圧が加わらないようにしている。さらにベース２３の上面には、このコンタクタ部２７の周囲を覆うようにカバー２８が設けられ、コンタクタ部２７の周囲、さらには端子部２４，２５の基部側を密閉している。コンタクタユニット２２は、このような密閉構造により、電源を遮断する系統を１つにまとめてユニット化させている。つまり、コンタクタユニット１２は、外付けされて、バッテリパック部１６に対して一体に組み付けてある。   Further, a contactor unit 22 is assembled as a shut-off unit at the center of the front part (vehicle body longitudinal direction) of the battery pack part 16. For example, as shown in FIGS. 5 and 6, the contactor unit 22 is assembled to a disk-shaped base 23 protruding from the center of the outer surface of the lower stage of the front wall of the lower case 18. The structure will be further described. A pair of output (main) terminal portions 24 is provided at the foremost portion of the base 23, and a pair of charging terminal portions 25 are provided at the side portions. Input / output lines (not shown) extending from the battery pack portion 16 are connected to the terminal portions 24 and 25, and a large amount of power required for driving the motor of the electric vehicle is output from the pair of terminal portions 24, or a pair of terminal portions. The power required for charging each battery 20 is input from 25. On the upper surface of the base 23, for example, a contactor unit 27 that is unitized by combining a main contactor and a charge contactor (consisting of a normally open type relay device that operates with an external signal: neither is shown) is installed. The main contactor is interposed in an energization path (not shown) between the terminal part 24 and the input / output part of the battery pack part 16, and the charge contactor is connected to an energization path (not shown) between the terminal part 25 and the input / output part of the battery pack part 16. When the battery pack device 15 is handled alone, the voltage of the battery 20 is not applied to the terminal portions 24 and 25 by the opening operation of each contactor. Further, a cover 28 is provided on the upper surface of the base 23 so as to cover the periphery of the contactor portion 27, and the periphery of the contactor portion 27 and the base portions of the terminal portions 24 and 25 are sealed. With such a sealed structure, the contactor unit 22 combines the systems that shut off the power supply into one unit. That is, the contactor unit 12 is externally attached and integrally assembled with the battery pack unit 16.

このコンタクタユニット２２の外形は、フロア下空間１３につながるフロアトンネル部８の端部分の形状にならわせてある。この形状を用いて、コンタクタユニット２２のほぼ全体をフロアトンネル部８の端部の内部空間に収めている。そして、メイン側となる一対の端子部２４が走行用モータなどパワープラント部（図示しない）に接続され、チャージ側となる一対の端子部２５が同パワープラント部の回生系統やチャージ口部（いずれも図示しない）に接続され、バッテリ２０から各機器へ電力を供給したり、発電系統やチャージ口部から充電電力がバッテリ２０へ供給されたりしている。   The outer shape of the contactor unit 22 is made to match the shape of the end portion of the floor tunnel portion 8 connected to the space 13 below the floor. Using this shape, almost the entire contactor unit 22 is accommodated in the internal space at the end of the floor tunnel portion 8. And a pair of terminal parts 24 used as the main side are connected to power plant parts (not shown), such as a motor for driving, and a pair of terminal parts 25 used as the charge side serve as a regeneration system or a charge port part of the power plant part. Is also connected to the battery 20, and power is supplied from the battery 20 to each device, or charging power is supplied to the battery 20 from the power generation system or the charge port.

またバッテリパック部１６は、図３、図５および図６に示されるように車体１から脱落しにくい構造で、車体１の各部に固定されている。同構造には、例えばバッテリパック部１６の前側（車体前後方向）を、軸心方向が車幅方向に向く締結部材、例えばボルト部材３０（本願の第１締結部材に相当）を用いて、車体部材、例えばクロスメンバ１１に支持させ、後側（車体前後方向）を、軸心方向が上下方向に向く締結部材、例えばボルト部材３１（本願の第２締結部材に相当）を用いて、車体部材、例えば左／右のサイドレール１０に支持させる構造が用いられている。具体的には、前側の構造には、例えば図６に示されるようにコンタクタユニット２０を挟んだ下側ケース１８の前壁両側（外面）に、それぞれ車幅方向に並ぶ一対の支持板３３を有する一対のブラケット３４を取着し、上記前壁と隣接する地点にあるクロスメンバ１１の両側（フロアトンネル端を挟んだ両側）に、それぞれ上記支持板３３を前方側から囲うチャンネル形状の受板３５をもつ一対のブラケット３６を取着し、車幅方向に並ぶ支持板３３と受板３５の側壁との間にボルト部材３０を挿通させてナット３７で止める構造が用いられている。つまり、バッテリパック部１６の前側は、車幅方向に延びるボルト部材３０で行われる締結により、クロスメンバ１１から吊り下がるように固定してある。なお、３８は、開放した支持板３３間を通るボルト部分に挿通したカラーを示す。   Further, as shown in FIGS. 3, 5, and 6, the battery pack portion 16 is fixed to each part of the vehicle body 1 with a structure that does not easily drop off from the vehicle body 1. In this structure, for example, the front side (vehicle body longitudinal direction) of the battery pack portion 16 is connected to a vehicle body using a fastening member whose axial center direction is in the vehicle width direction, for example, a bolt member 30 (corresponding to the first fastening member of the present application). Using a fastening member, for example, a bolt member 31 (corresponding to the second fastening member of the present application), which is supported by a member, for example, the cross member 11 and whose rear side (vehicle body longitudinal direction) is axially oriented in the vertical direction, For example, a structure for supporting the left / right side rail 10 is used. Specifically, for example, as shown in FIG. 6, the front structure includes a pair of support plates 33 arranged in the vehicle width direction on both sides (outer surfaces) of the lower case 18 sandwiching the contactor unit 20. A pair of brackets 34 are attached, and channel-shaped receiving plates that surround the support plate 33 from the front side on both sides (both sides sandwiching the floor tunnel end) of the cross member 11 at points adjacent to the front wall. A structure is used in which a pair of brackets 36 having 35 are attached, and a bolt member 30 is inserted between the support plate 33 and the side wall of the receiving plate 35 arranged in the vehicle width direction and is fastened by a nut 37. That is, the front side of the battery pack portion 16 is fixed so as to be suspended from the cross member 11 by fastening performed by the bolt member 30 extending in the vehicle width direction. Reference numeral 38 denotes a collar inserted into a bolt portion passing between the opened support plates 33.

また後側の構造には、例えば図６に示されるように下側ケース１８の車幅方向両側壁に、上面に設置座４０が形成された一対の台状のブラケット４１を取着し、上記側壁と隣接する地点にあるサイドレール１０の下部に、下面にねじ孔４２（固定孔）が開口した台状のブラケット４３を取着し、ブラケット４１に形成された上下方向に貫通する通孔４４からボルト部材３１をブラケット４３のねじ孔４２へ螺挿する構造が用いられている。つまり、バッテリパック部１６の後側は、上下方向に延びるボルト部材３１で行われる締結により、一対のサイドレール１０から吊り下がるように固定してある。またボルト部材３１は、サイドレール１０の変形（曲がり）がもたらす荷重が軸方向へ所定値以上、加わると、破断、例えばねじ孔４２から脱落するように設定されている。 Further, for example, as shown in FIG. 6, a pair of platform-like brackets 41 having installation seats 40 formed on the upper surface are attached to the rear side structure on both side walls in the vehicle width direction of the lower case 18, as shown in FIG. A trapezoidal bracket 43 having a screw hole 42 (fixed hole) opened on the lower surface is attached to the lower portion of the side rail 10 at a point adjacent to the side wall, and a through hole 44 formed in the bracket 41 that penetrates in the vertical direction. A structure in which the bolt member 31 is screwed into the screw hole 42 of the bracket 43 is used. That is, the rear side of the battery pack portion 16 is fixed so as to be suspended from the pair of side rails 10 by fastening performed by the bolt members 31 extending in the vertical direction. Further, the bolt member 31 is set to be broken, for example, dropped from the screw hole 42 when a load caused by deformation (bending) of the side rail 10 is applied in the axial direction by a predetermined value or more.

つまり、バッテリパック装置１５は、車両後端から衝撃が加わると、バッテリパック部１６を固定している前側の固定状態はそのままに、後側の固定だけが解除される構造で支持されていて、容易には車体１からバッテリパック装置１５が脱落しない構造にしている。   That is, when an impact is applied from the rear end of the vehicle, the battery pack device 15 is supported by a structure in which only the rear side fixing is released while the front side fixing state fixing the battery pack unit 16 remains unchanged. The battery pack device 15 is not easily detached from the vehicle body 1.

上述のようにコンタクタユニット２２を外付けで一体に組み込むバッテリパック装置１５を採用したことにより、バッテリパック部１６の内部機器の大きな変更、例えばバッテリのレイアウトの変更やバッテリ間をつなぐ接続部材のルートの変更などを回避（内部機器に加わる負担の抑制）した、コンタクタユニット２２が一体になったバッテリパック装置１５が実現できる。   By adopting the battery pack device 15 in which the contactor unit 22 is integrated externally as described above, a large change in the internal equipment of the battery pack unit 16, for example, a change in the layout of the battery or the route of the connecting member that connects the batteries Therefore, the battery pack device 15 in which the contactor unit 22 is integrated can be realized.

しかも、バッテリパック部１６は、既存の車体では燃料タンクが配置される部位となっていたフロア下空間１３内に収まるように構成され、コンタクタユニット２２は、同じくフロア下空間１３と連通するフロアトンネル部８内に収まるように構成されているから、図５に示されるようにエンジンを搭載する車体１に有る既存のスペースを、そのまま設置スペースに活用して、バッテリパック装置１５の全体を車体１に組み付けることができる。   Moreover, the battery pack unit 16 is configured to be accommodated in the under-floor space 13 where the fuel tank is disposed in the existing vehicle body, and the contactor unit 22 is also a floor tunnel that communicates with the under-floor space 13. Since it is configured to fit within the portion 8, the existing space in the vehicle body 1 on which the engine is mounted as shown in FIG. Can be assembled.

またバッテリパック装置１５の固定には、バッテリパック部１６の前側を、車幅方向に向くボルト部材３０（左／右：２本）で車体側に支持し、後側を、上下方向に向くボルト部材３１（左／右：２本）で車体側に支持した構造を採用したことにより、図４中の二点鎖線（一部だけ）に示されるように例えば衝突により車体１の後部から衝撃を受けてサイドレール１０が変形したような場合（衝突エネルギー：大） 、その変形が前後のボルト部材３０，３１のうち、後側のボルト部材３１には抜け出る方向に作用するようになる。そのため、大きな衝撃が車体後部から加わると、ボルト部材３１だけが脱落して、残る前側のボルト部材３１でバッテリパック装置１５の支持を継続するようになる。その結果、バッテリパック部１６へ加わる衝撃入力は抑えられる。しかも、バッテリパック装置１５の脱落が防止されるので、安全性の向上が図れる。そのうえ、ボルト部材３１の脱落により、大きな衝撃吸収性をもたらすサイドレール１０の端部分での衝撃吸収は妨げずにすむので、衝撃吸収性の確保の点にも優れる利点がある。



In order to fix the battery pack device 15, the front side of the battery pack part 16 is supported on the vehicle body side by bolt members 30 (left / right: two) facing in the vehicle width direction, and the rear side is bolts facing in the vertical direction. By adopting a structure in which the member 31 (left / right: two) is supported on the vehicle body side, as shown by a two-dot chain line (only a part) in FIG. When the side rail 10 is deformed (collision energy: high), the deformation acts on the rear bolt member 31 of the front and rear bolt members 30 and 31 in a direction of coming out. Therefore, when a large impact is applied from the rear part of the vehicle body, only the bolt member 31 is dropped, and the battery pack device 15 is continuously supported by the remaining front bolt member 31. As a result, the impact input applied to the battery pack unit 16 is suppressed. In addition, since the battery pack device 15 is prevented from falling off, safety can be improved. In addition, since the bolt member 31 is dropped, the shock absorption at the end portion of the side rail 10 that provides a large shock absorption is not hindered, so that there is an advantage that the shock absorption is excellent.



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変更して実施しても構わない。   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.

本発明の一実施形態のバッテリパック装置を、同装置を搭載した電気自動車の車体と共に示す平断面図。BRIEF DESCRIPTION OF THE DRAWINGS The plane sectional view which shows the battery pack apparatus of one Embodiment of this invention with the vehicle body of the electric vehicle carrying the apparatus. 同じく側断面図。Similarly side sectional drawing. バッテリパック装置の支持構造を示す側断面図。The sectional side view which shows the support structure of a battery pack apparatus. 車体後部から衝撃が加わったときのバッテリパック装置の挙動を説明するための側断面図。The sectional side view for demonstrating the behavior of a battery pack apparatus when an impact is added from the vehicle body rear part. バッテリパック装置の支持構造を示す斜視図。The perspective view which shows the support structure of a battery pack apparatus. 同じく分解斜視図。Similarly disassembled perspective view.

符号の説明Explanation of symbols

１…車体、８…フロアトンネル部（フロアトンネル）、１０,１１…サイドレール,クロスメンバ（車体部材）、１３…フロア下空間、１５…バッテリパック装置、１６…バッテリパック部、１９…密閉ケース（ケース）、２０…バッテリ（蓄電池）、２２…コンタクタユニット（遮断ユニット部）、３０，３１…ボルト部材（第１締結部材,第２締結部材）、３４，３６，４１，４３…ブラケット。   DESCRIPTION OF SYMBOLS 1 ... Vehicle body, 8 ... Floor tunnel part (floor tunnel), 10, 11 ... Side rail, cross member (vehicle body member), 13 ... Space under floor, 15 ... Battery pack apparatus, 16 ... Battery pack part, 19 ... Sealing case (Case), 20 ... battery (storage battery), 22 ... contactor unit (interrupt unit), 30, 31 ... bolt member (first fastening member, second fastening member), 34, 36, 41, 43 ... bracket.

Claims (1)

ケース内に複数の蓄電池を収めてユニット化された電気自動車駆動用のバッテリパック部と、
前記ケースの外面に外付けされて該バッテリパック部と一体に設けられた、前記バッテリパック部の電源を遮断するための遮断ユニット部と
を具備し、
前記バッテリパック部は、フロアトンネルおよびリヤシートを有する車体のうち、前記リヤシートのフロア下に有するフロア下空間に収まるように構成され、
前記遮断ユニット部は、前記フロア下空間と連通するフロアトンネルの端部分内に収まるように構成され、
前記バッテリパック部は、車体前後方向前側のパック部分が、軸心方向が車幅方向に向く第１締結部材を介して、フロア下の車体部材に固定され、車体前後方向後側のパック部分が、軸心方向が上下方向に向く第２締結部材を介して、フロア下のサイドレールに固定され、
前記第２締結部材の前記サイドレールへの固定は、前記サイドレールの曲がりがもたらす荷重が前記軸心方向に所定値以上作用すると、第２締結部材が脱落するように設定され、
前記所定値は、前記サイドレールの衝撃吸収を妨げない値に設定される
ことを特徴とする電気自動車用バッテリパック装置。 A battery pack unit for driving an electric vehicle unitized by storing a plurality of storage batteries in a case;
A cut-off unit part that is externally attached to the outer surface of the case and provided integrally with the battery pack part, for cutting off the power supply of the battery pack part ,
The battery pack portion is configured to fit in a space below the floor of the vehicle body having a floor tunnel and a rear seat, which is below the floor of the rear seat,
The blocking unit portion is configured to fit within an end portion of a floor tunnel communicating with the space under the floor;
The battery pack portion is fixed to a vehicle body member below the floor via a first fastening member whose front side in the longitudinal direction of the vehicle body is oriented in the vehicle width direction. , Fixed to the side rail under the floor via the second fastening member whose axial direction is directed in the vertical direction,
The fixing of the second fastening member to the side rail is set so that the second fastening member drops off when a load caused by the bending of the side rail acts more than a predetermined value in the axial direction.
The battery pack device for an electric vehicle according to claim 1, wherein the predetermined value is set to a value that does not interfere with shock absorption of the side rail .
JP2004258478A 2004-09-06 2004-09-06 Battery pack device for electric vehicles Expired - Fee Related JP4609006B2 (en)

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JP5364767B2 (en) * 2011-09-26 2013-12-11 富士重工業株式会社 Battery support structure for vehicle
JP6035990B2 (en) * 2012-08-13 2016-11-30 日産自動車株式会社 Vehicle power supply
JP5880509B2 (en) * 2013-09-25 2016-03-09 トヨタ自動車株式会社 Vehicle rear structure
JP6699491B2 (en) * 2016-09-30 2020-05-27 トヨタ自動車株式会社 In-vehicle structure of electrical equipment
JP7256450B2 (en) * 2019-04-24 2023-04-12 マツダ株式会社 Vehicle battery system
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