JP2018056093A - Power storage device - Google Patents

Power storage device Download PDF

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JP2018056093A
JP2018056093A JP2016194737A JP2016194737A JP2018056093A JP 2018056093 A JP2018056093 A JP 2018056093A JP 2016194737 A JP2016194737 A JP 2016194737A JP 2016194737 A JP2016194737 A JP 2016194737A JP 2018056093 A JP2018056093 A JP 2018056093A
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storage device
power storage
terminal
upper cover
secondary battery
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孝行 中島
Takayuki Nakajima
孝行 中島
篤 関根
Atsushi Sekine
篤 関根
芳久 鶴見
Yoshihisa Tsurumi
芳久 鶴見
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Hitachi Astemo Ltd
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Hitachi Automotive Systems 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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  • Connection Of Batteries Or Terminals (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device which achieves higher waterproof reliability.SOLUTION: A power storage device of the invention includes: a battery pack formed by laminating secondary battery cells; a case which houses the battery pack and has an opening; and an upper cover which closes the opening of the case. The upper cover has an upper surface and a depressed part depressed from the upper surface. An external terminal connecting with the battery pack is disposed in the depressed part. An upper surface of the external terminal is disposed at a position lower than the upper surface of the upper cover.SELECTED DRAWING: Figure 5

Description

本発明は、蓄電装置に関する。   The present invention relates to a power storage device.

電気自動車やハイブリッド電気自動車の駆動電源や補機電源として用いられている蓄電装置は、電池がケースに収納された状態で、車両の荷台のフロアや座席下のフロアなどに搭載されている。車内にはいろいろな形で水が浸入する。例えば、車内でこぼれた水や、ドアを開いたとき或いは雨具と一緒に雨水が浸入する。この他、外部環境の影響によって結露が生じる。このため、蓄電装置には、車両搭載箇所によって異なってくるが、防水構造が要求される場合がある。   A power storage device used as a driving power source or an auxiliary power source for an electric vehicle or a hybrid electric vehicle is mounted on a floor of a cargo bed of a vehicle, a floor under a seat, or the like with a battery housed in a case. Water enters the car in various ways. For example, water spilled in the car, rainwater invades when the door is opened or with rain gear. In addition, condensation occurs due to the influence of the external environment. For this reason, the power storage device may be required to have a waterproof structure, depending on the location where the vehicle is mounted.

蓄電装置の防水構造としては、例えば特許文献１から３に記載されたものがある。このうち、特許文献１には、ワッシャを介して、ケース本体とカバープレートとを止ネジにより固定する場合に、ワッシャとカバープレートとの間に非通水性のクッション材を狭着する防水構造が記載されている（例えば特許文献１の段落００２０乃至００２８、図５乃至７参照）。   Examples of the waterproof structure of the power storage device include those described in Patent Documents 1 to 3. Among these, Patent Document 1 discloses a waterproof structure in which a non-water-permeable cushion material is tightly sandwiched between a washer and a cover plate when the case body and the cover plate are fixed with a set screw through the washer. (See, for example, paragraphs 0020 to 0028 and FIGS. 5 to 7 of Patent Document 1).

また、特許文献２には、収容容器に収納した電池の電極端子を収容容器の側面から外部に露出させる場合に、収納容器の上面と側面との間に遮蔽壁を設ける防水構造が記載されている（例えば特許文献２の段落００３４乃至００４０、図１乃至４参照）。   Patent Document 2 describes a waterproof structure in which a shielding wall is provided between the upper surface and the side surface of the storage container when the electrode terminals of the battery stored in the storage container are exposed to the outside from the side surface of the storage container. (For example, refer to paragraphs 0034 to 0040 and FIGS. 1 to 4 of Patent Document 2).

さらに、特許文献３には、バッテリの外部に露出したバッテリポストにバッテリ端子を締付接続して、バッテリ端子にヒューズユニットを締付接続した場合に、バッテリポスト、バッテリ端子及びヒューズユニットをバッテリカバーで覆う防水構造が記載されている（例えば特許文献３の段落００２７乃至００２９、図１乃至５，７参照）。   Further, in Patent Document 3, when a battery terminal is tightened and connected to a battery post exposed outside the battery, and a fuse unit is tightened and connected to the battery terminal, the battery post, the battery terminal and the fuse unit are covered with a battery cover. (See, for example, paragraphs 0027 to 0029 and FIGS. 1 to 5 and 7 of Patent Document 3).

特開２０１６−３５９４１号公報JP 2016-35941 A 特開２０１３−１９６９８１号公報JP 2013-196981 A 特開２００２−２８９１７１号公報JP 2002-289171 A

蓄電装置と外部機器とを電気的に接続するための正負極外部端子を筐体の外部に露出させる場合には、特許文献３に記載されているように、正負極外部端子を覆い部材で覆うことによって、正負極外部端子の防水を図ることができるが、筐体や覆い部材の仕様によってはさらに防水を図る必要性がある。   When the positive and negative external terminals for electrically connecting the power storage device and the external device are exposed to the outside of the housing, as described in Patent Document 3, the positive and negative external terminals are covered with a covering member. Thus, the positive and negative external terminals can be waterproofed, but there is a need for further waterproofing depending on the specifications of the housing and the covering member.

従って、本発明では、より防水信頼性の高い蓄電装置を提供することを課題とする。   Therefore, an object of the present invention is to provide a power storage device with higher waterproof reliability.

本発明の代表的一態様によると、本発明の蓄電装置は、二次電池セルを複数積層させた組電池と、組電池を収納し、開口を有するケースと、ケースの開口を塞ぐ上カバーと、を備え、上カバーは、上面と、上面から陥没する窪み部を有し、窪み部には前記組電池と繋がる外部端子が配置され、外部端子の上面は前記上カバーの上面よりも低い位置に配置される。   According to a representative aspect of the present invention, an electricity storage device of the present invention includes an assembled battery in which a plurality of secondary battery cells are stacked, a case that houses the assembled battery and has an opening, and an upper cover that closes the opening of the case. The upper cover has an upper surface and a recessed portion that is recessed from the upper surface, and an external terminal connected to the assembled battery is disposed in the recessed portion, and the upper surface of the external terminal is lower than the upper surface of the upper cover. Placed in.

本発明によれば、筐体と覆い部材の貫通孔に固定部材を貫通させて覆い部材を筐体に固定すると共に、正負極外部端子の露出部位が、覆い部材と筐体との固定部位よりも低い位置にあって、周囲の少なくとも一部が筐体の壁面で囲まれ、正負極外部端子の露出部位と、覆い部材と筐体との固定部位とが筐体の壁面を介して連絡している場合において、貫通孔から筐体の内部に水が浸入しないようにすることができると共に、筐体の壁面を伝って、覆い部材と筐体との固定部位から正負極外部端子の露出部位に水が浸入するのを止めることができ、蓄電装置の防水性を向上させることができる。   According to the present invention, the fixing member is passed through the through holes of the casing and the covering member to fix the covering member to the casing, and the exposed portion of the positive and negative external terminals is more than the fixing portion of the covering member and the casing. At least part of the periphery is surrounded by the wall surface of the housing, and the exposed part of the positive and negative external terminals and the fixed part of the cover member and the housing are in communication via the wall surface of the housing. In this case, water can be prevented from entering the inside of the housing through the through hole, and the exposed portion of the positive and negative external terminals from the fixing portion between the covering member and the housing through the wall surface of the housing. Water can be prevented from entering the battery, and the waterproof property of the power storage device can be improved.

本発明の蓄電装置の一実施の形態としての二次電池装置の外観斜視図。1 is an external perspective view of a secondary battery device as an embodiment of a power storage device of the present invention. 図１に図示された二次電池装置において、上カバーを外した組付け状態を示す上面斜視図。FIG. 2 is a top perspective view showing the assembled state with the upper cover removed in the secondary battery device shown in FIG. 1. 図１に示す二次電池装置の分解斜視図。The disassembled perspective view of the secondary battery apparatus shown in FIG. 端子カバーの拡大図Enlarged view of terminal cover 図１に図示されたＨＶ端子近傍の断面斜視図FIG. 1 is a cross-sectional perspective view of the vicinity of the HV terminal shown in FIG.

以下、本発明の蓄電装置の一実施の形態を、図面を参照して説明する。なお、以下では、蓄電装置として二次電池装置を例示して説明する。   Hereinafter, an embodiment of a power storage device of the present invention will be described with reference to the drawings. Hereinafter, a secondary battery device will be described as an example of the power storage device.

図１は、本実施例を示す二次電池装置１の外観を示す上面斜視図である。二次電池装置１は、ケース本体２と上カバー３で構成されるケースを備えている。二次電池装置１の上面の長手方向両端には、外部端子の露出を防止する部材、端子カバー１１および端子カバー１２が設けられている。   FIG. 1 is a top perspective view showing an appearance of a secondary battery device 1 according to the present embodiment. The secondary battery device 1 includes a case constituted by a case main body 2 and an upper cover 3. At both ends of the upper surface of the secondary battery device 1 in the longitudinal direction, members for preventing the external terminals from being exposed, a terminal cover 11 and a terminal cover 12 are provided.

二次電池装置１の側面には信号用コネクタ７１が配置されている。信号用コネクタ７１は二次電池装置１のコントローラの信号用コネクタであり、車両側のコントローラと接続されて、情報のやり取りや電源（例えば、１２Ｖ）の供給を受ける。   A signal connector 71 is disposed on the side surface of the secondary battery device 1. The signal connector 71 is a signal connector of the controller of the secondary battery device 1 and is connected to the vehicle-side controller to receive information exchange and supply of power (for example, 12V).

なお、以下の説明において、左右方向、前後方向、上下方向を、それぞれ、図示の方向とする。   In the following description, the left-right direction, the front-rear direction, and the up-down direction are respectively illustrated directions.

（二次電池装置の全体構造）
図２は、１に示す二次電池装置の分解斜視図である。 (Overall structure of secondary battery device)
FIG. 2 is an exploded perspective view of the secondary battery device shown in FIG.

ケース本体２は、底部２ａを有し、上方が開口された直方体形状のボックス状の部材である。   The case body 2 is a rectangular parallelepiped box-shaped member having a bottom portion 2a and opened upward.

ケース本体２内には、複数の二次電池セル４が長手方向（左右方向）に配列されている。また、ケース本体２内には、二次電池セル４が配列された領域の上方にコントロール基板７が収容されている。さらに、ケース本体２には、二次電池セル４が収容された領域の右端側にジャンクションボックス８が収容されている。なお、ジャンクションボックス８には、正負極のメインリレーおよび負極プリチャージリレー等、複数のリレーを備えているものもある。   A plurality of secondary battery cells 4 are arranged in the longitudinal direction (left-right direction) in the case body 2. In the case body 2, a control board 7 is accommodated above the area where the secondary battery cells 4 are arranged. Further, the case body 2 accommodates a junction box 8 on the right end side of the region where the secondary battery cells 4 are accommodated. The junction box 8 includes a plurality of relays such as a positive / negative main relay and a negative precharge relay.

上カバー３は、上面３ａが平坦で、平面視で、一対の長辺と一対の短辺とを有する矩形形状を有する。上カバー３の後方側の２つのコーナー部には、上面３ａから陥没した窪み部１１Ｌ、１１Ｒが形成されている。窪み部１１Ｌ、１１Ｒのそれぞれの底部１２には、ＨＶ端子８１およびＨＶ端子８２の外周に沿って、Ｕ字形状に形成された開口１２ａが設けられている。ＨＶ端子８１、８２は、それぞれ、窪み部１１Ｌ、１１Ｒの底部１２の開口１２ａから露出している。   The upper cover 3 has a flat top surface 3a and a rectangular shape having a pair of long sides and a pair of short sides in plan view. In the two corners on the rear side of the upper cover 3, recessed portions 11 </ b> L and 11 </ b> R that are recessed from the upper surface 3 a are formed. An opening 12a formed in a U shape is provided along the outer periphery of the HV terminal 81 and the HV terminal 82 at the bottom 12 of each of the recesses 11L and 11R. The HV terminals 81 and 82 are exposed from the opening 12a of the bottom 12 of the recesses 11L and 11R, respectively.

二次電池セル４は、例えば、リチウムイオン二次電池である。   The secondary battery cell 4 is, for example, a lithium ion secondary battery.

二次電池セル４は、電池缶４２と電池蓋４１とを接合して構成された電池容器内に不図示の発電要素が収容され、非水電解液が注入された角形の二次電池セルである。電池缶４２および電池蓋４１は、例えば、アルミニウム等の金属により形成されている。   The secondary battery cell 4 is a rectangular secondary battery cell in which a power generation element (not shown) is accommodated in a battery container formed by joining a battery can 42 and a battery lid 41 and a non-aqueous electrolyte is injected. is there. The battery can 42 and the battery lid 41 are made of a metal such as aluminum, for example.

電池蓋４１の幅方向（前後方向）の一端側付近には正極電極４３が、他端側付近には負極電極４４が設けられている。正、負極電極４３、４４は、それぞれ、発電要素の正、負極の電極に接続されている。正、負極電極４３、４４は、電池蓋４１の平坦な上面から上方に突出している。   A positive electrode 43 is provided near one end of the battery lid 41 in the width direction (front-rear direction), and a negative electrode 44 is provided near the other end. The positive and negative electrodes 43 and 44 are connected to the positive and negative electrodes of the power generation element, respectively. The positive and negative electrodes 43 and 44 protrude upward from the flat upper surface of the battery lid 41.

二次電池セル４は、電池蓋４１と反対側の底面、左右方向に対向する大面積の表裏面および前後方向に対向する小面積の一対の側面を有する。二次電池セル４は、大面積の表裏面を対向して、正極電極４３、負極電極４４が交互に反対側に配置されるように直線状に配列されている。   The secondary battery cell 4 has a bottom surface opposite to the battery lid 41, a large area front and back surfaces facing in the left-right direction, and a pair of small area side surfaces facing in the front-rear direction. The secondary battery cells 4 are arranged in a straight line such that the positive and negative electrodes 43 and 44 are alternately arranged on the opposite side with the large and front surfaces facing each other.

二次電池セル４の間には仕切り部材５が配設されている。この仕切り部材５は、左端側の二次電池セル４の左側および右端側の二次電池セル４の右側（配列方向の前後端）にも配設されている。仕切り部材５は、例えば、ＰＢＴ（ポリブチレンテレフタレート）等の樹脂により形成される。   A partition member 5 is disposed between the secondary battery cells 4. The partition member 5 is also disposed on the left side of the secondary battery cell 4 on the left end side and on the right side (front and rear ends in the arrangement direction) of the secondary battery cell 4 on the right end side. The partition member 5 is formed of, for example, a resin such as PBT (polybutylene terephthalate).

図３は、図２に図示された二次電池装置において、上カバーを外した組付け状態を示す上面斜視図である。   FIG. 3 is a top perspective view showing the assembled state in which the upper cover is removed in the secondary battery device shown in FIG.

組電池１Ｒの上部に押圧用カバー６が配置される。押圧用カバー６上には、前部側部および後部側部に沿って左右方向に延在する一対のバンドプレート１０が配置される。バンドプレート１０は、ねじ等の締結部材９１（図３参照）によりケース本体２に固定される。押圧用カバー６は、バンドプレート１０とケース本体２に挟圧されて組電池１Ｒ上に固定される。押圧用カバー６の上面の前後方向におけるほぼ中央には、コントロール基板７が配置される。コントロール基板７は、ねじ等の締結部材９２（図３参照）により、ケース本体２に固定される。   A pressing cover 6 is disposed above the assembled battery 1R. On the pressing cover 6, a pair of band plates 10 extending in the left-right direction along the front side portion and the rear side portion are disposed. The band plate 10 is fixed to the case body 2 by a fastening member 91 (see FIG. 3) such as a screw. The pressing cover 6 is clamped between the band plate 10 and the case body 2 and fixed on the assembled battery 1R. A control board 7 is disposed approximately at the center of the upper surface of the pressing cover 6 in the front-rear direction. The control board 7 is fixed to the case main body 2 by a fastening member 92 (see FIG. 3) such as a screw.

押圧用カバー６は、例えば、ＰＰまたはＰＰＥ（変性ポリフェニレンエーテル）等の樹脂により形成される。   The pressing cover 6 is formed of a resin such as PP or PPE (modified polyphenylene ether).

コントロール基板７は、二次電池セル４を接続するセル間バスバ９（図３参照）に電気的に接続され、各二次電池セル４の電圧を測定、監視している。セル間バスバ９は、配列方向（左右方向）に隣接する一方の二次電池セル４の正極電極４３と、他方の二次電池セル４の負極電極４４とに溶接等により接合され、組電池１Ｒを構成する二次電池セル４のすべてを直列に接続する。   The control board 7 is electrically connected to an inter-cell bus bar 9 (see FIG. 3) that connects the secondary battery cells 4, and measures and monitors the voltage of each secondary battery cell 4. The inter-cell bus bar 9 is joined by welding or the like to the positive electrode 43 of one secondary battery cell 4 and the negative electrode 44 of the other secondary battery cell 4 adjacent to each other in the arrangement direction (left-right direction). Are connected in series.

図３に図示された状態において、ケース本体２に上カバー３が取付けられて図１に図示される二次電池装置１が構成される。上カバー３は、例えば、ＰＰ（ポリプロピレン）等の樹脂により形成されている。   In the state illustrated in FIG. 3, the upper cover 3 is attached to the case body 2 to constitute the secondary battery device 1 illustrated in FIG. 1. The upper cover 3 is formed of a resin such as PP (polypropylene), for example.

図４は、図１に図示されたＨＶ端子近傍の拡大図であり、図５は、図１のＡ−Ａ断面図である。   4 is an enlarged view of the vicinity of the HV terminal shown in FIG. 1, and FIG. 5 is a cross-sectional view taken along line AA of FIG.

上述したように、上カバー３には、上面３ａから陥没する２つの窪み部１１Ｒが設けられている。ＨＶ端子８２は、それぞれ、上カバー３の窪み部１１Ｒにおいて、上カバー３から露出されている。窪み部１１ＲとＨＶ端子８２についても同様である。   As described above, the upper cover 3 is provided with the two recessed portions 11R that are recessed from the upper surface 3a. The HV terminals 82 are exposed from the upper cover 3 in the recessed portions 11 </ b> R of the upper cover 3. The same applies to the recess 11R and the HV terminal 82.

図５に図示されるように、ケース本体２内には、端子台６５が収容されている。端子台６５は、ケース本体内の左側端部付近および右側端部付近に配置されている。ＨＶ端子８２は、端子台６５上に配置される。なお、ＨＶ端子８２取付構造について説明するが、ＨＶ端子８１の取付構造はＨＶ端子８２とほぼ同一であるため、割愛する。   As shown in FIG. 5, a terminal block 65 is accommodated in the case body 2. The terminal block 65 is arranged near the left end and the right end in the case body. The HV terminal 82 is disposed on the terminal block 65. Although the HV terminal 82 mounting structure will be described, the mounting structure of the HV terminal 81 is substantially the same as that of the HV terminal 82, and is therefore omitted.

ＨＶ端子８２は、組電池１Ｒの配列方向の一端側に配置された二次電池セル４の正極電極４３に接続される正極側のバスバ８２Ａに一体に形成されている。すなわち、ＨＶ端子８２は、正極側のバスバ８２Ａの端部に、該バスバ８２Ａの一部として設けられており、上カバー３の上面３ａとほぼ平行に延在され、平面視でＵ字形状の平板状部材である。   The HV terminal 82 is integrally formed with a bus bar 82A on the positive electrode side connected to the positive electrode 43 of the secondary battery cell 4 arranged on one end side in the arrangement direction of the assembled battery 1R. That is, the HV terminal 82 is provided as a part of the bus bar 82A at the end of the bus bar 82A on the positive electrode side, extends substantially parallel to the upper surface 3a of the upper cover 3, and has a U-shape in plan view. It is a flat member.

ＨＶ端子８２は、端子台６５の上面に配置され、上カバー３の窪み部１１Ｒの底部１２に形成された開口１２ａ（図２参照）から露出している。ＨＶ端子８２の上面８１ｂは、窪み部１１Ｒの底部１２の上面１２ｂより少し高い位置に位置している。   The HV terminal 82 is disposed on the upper surface of the terminal block 65 and exposed from an opening 12a (see FIG. 2) formed in the bottom 12 of the recess 11R of the upper cover 3. The upper surface 81b of the HV terminal 82 is located at a position slightly higher than the upper surface 12b of the bottom 12 of the recess 11R.

上カバー３の窪み部１１Ｒと上カバー３の上面３ａとの間には、上カバー３の窪み部１１Ｒの段部を形成する側部１２ｃが形成されている。側部１２ｃの下端とＨＶ端子８２の上面８２ｂとの間には隙間Ｃ1（図５参照）が設けられている。この隙間Ｃ1には、第１の封止部材１５が介装されている。第１の封止部材１５は、ほぼ中央部で段部の側部１２ｃの下端によりＨＶ端子８２に押圧されており、これにより、上カバー３とＨＶ端子８２とが密封されている。第１の封止部材１５の側部１２ｃにより押圧される部分に、凹部１５ａ（図５参照）を形成してもよい。   Between the recess 11R of the upper cover 3 and the upper surface 3a of the upper cover 3, a side portion 12c that forms a step portion of the recess 11R of the upper cover 3 is formed. A gap C1 (see FIG. 5) is provided between the lower end of the side portion 12c and the upper surface 82b of the HV terminal 82. A first sealing member 15 is interposed in the gap C1. The first sealing member 15 is pressed against the HV terminal 82 by the lower end of the side part 12c of the stepped part at the substantially central part, whereby the upper cover 3 and the HV terminal 82 are sealed. A recess 15 a (see FIG. 5) may be formed in a portion pressed by the side portion 12 c of the first sealing member 15.

端子台６５には、ほぼＵ字形状のＨＶ端子８２の外周面に接するように該外周面に沿ってＵ字形状に形成された突起部６６が形成されている。突起部６６は、モールド成型により端子台６５に一体に形成されている。突起部６６の上端は、ＨＶ端子８２の上面８２ｂとほぼ同一の高さに位置している。端子台６５の突起部６６の内周側の上面６５ａ上に、ＨＶ端子８２の端部が載置されている。つまり、端子台６５の突起部６６の内周側の上面６５ａは、ＨＶ端子８２が載置される外部端子載置面となっている。端子台６５の突起部６６の外周側の上面６５ｂは、内周側の上面６５ａより低い位置に位置している。端子台６５の突起部６６の外周側の上面６５ｂと上カバー３の窪み部１１Ｒの底部１２の下面との間には、第２の封止部材１６が介装されている。換言すれば、端子台６５の突起部６６の外周側の上面６５ｂは、窪み部１１Ｒの底部１２の上面１２ｂから、窪み部１１Ｒの底部の厚さと第２の封止部材１６の厚さとを合わせた厚さ分、低い位置に位置している。   The terminal block 65 is formed with a protruding portion 66 formed in a U shape along the outer peripheral surface so as to contact the outer peripheral surface of the substantially U-shaped HV terminal 82. The protrusion 66 is integrally formed with the terminal block 65 by molding. The upper end of the protrusion 66 is located at substantially the same height as the upper surface 82 b of the HV terminal 82. The end of the HV terminal 82 is placed on the upper surface 65 a on the inner peripheral side of the protrusion 66 of the terminal block 65. That is, the upper surface 65a on the inner peripheral side of the protrusion 66 of the terminal block 65 is an external terminal mounting surface on which the HV terminal 82 is mounted. The upper surface 65b on the outer peripheral side of the protrusion 66 of the terminal block 65 is located at a position lower than the upper surface 65a on the inner peripheral side. A second sealing member 16 is interposed between the upper surface 65 b on the outer peripheral side of the protrusion 66 of the terminal block 65 and the lower surface of the bottom 12 of the recess 11 </ b> R of the upper cover 3. In other words, the upper surface 65b on the outer peripheral side of the protrusion 66 of the terminal block 65 is formed by combining the thickness of the bottom of the recess 11R and the thickness of the second sealing member 16 from the upper surface 12b of the bottom 12 of the recess 11R. It is located at a low position by the thickness.

上カバー３の窪み部１１Ｒの底部１２は、第２の封止部材１６を端子台６５の上面６５ｂに押し付けている。これにより、上カバー３の窪み部１１Ｒの底部１２と端子台６５とが密封されている。つまり、端子台６５の突起部６６の外周側の上面６５ｂは、第２の封止部材１６が載置される封止面となっている。   The bottom 12 of the recess 11 </ b> R of the upper cover 3 presses the second sealing member 16 against the upper surface 65 b of the terminal block 65. Thereby, the bottom part 12 of the hollow part 11R of the upper cover 3 and the terminal block 65 are sealed. That is, the upper surface 65 b on the outer peripheral side of the protrusion 66 of the terminal block 65 is a sealing surface on which the second sealing member 16 is placed.

端子台６５には、ＨＶ端子８２の貫通孔１８に対応してねじ孔６７が設けられている。図示はしないが、ＨＶ端子８２の貫通孔１８を介して、ＨＶケーブル先端に設けられた端子部を固定するボルト等の締結部材が端子台６５のねじ孔６７に締結される。これにより、ＨＶケーブルを介して、二次電池装置１が車両等に搭載された電気機器に接続される。   The terminal block 65 is provided with a screw hole 67 corresponding to the through hole 18 of the HV terminal 82. Although not shown, a fastening member such as a bolt for fixing a terminal portion provided at the tip of the HV cable is fastened to the screw hole 67 of the terminal block 65 through the through hole 18 of the HV terminal 82. Thereby, the secondary battery apparatus 1 is connected to the electric equipment mounted in the vehicle etc. via the HV cable.

上記一実施の形態によれば、下記の効果を奏する。   According to the one embodiment, the following effects are obtained.

（１）上カバー３は、該上カバー３の上面３ａから陥没する窪み部１１Ｌ、１１Ｒを有し、ＨＶ端子８１、８２は、上カバー３の上面３ａと平行に配置され、ＨＶ端子８１、８２は、上カバー３の上面３ａより低い位置において、上カバー３の窪み部１１Ｌ、１１Ｒの底部から露出している。このため、外部端子であるＨＶ端子８１、８２を備える二次電池装置１の高さを抑え、小型化を図ることができる。   (1) The upper cover 3 has depressions 11L and 11R that are recessed from the upper surface 3a of the upper cover 3, and the HV terminals 81 and 82 are arranged in parallel with the upper surface 3a of the upper cover 3, and the HV terminals 81, 82 is exposed from the bottom of the recesses 11L and 11R of the upper cover 3 at a position lower than the upper surface 3a of the upper cover 3. For this reason, the height of the secondary battery device 1 including the HV terminals 81 and 82 that are external terminals can be suppressed, and the size can be reduced.

（２）ＨＶ端子８１、８２は、バスバ８１Ａ（８１Ａは図示せず）、８２Ａの端部に、該バスバ８１Ａ、８２Ａの一部として設けられている。このため、部品点数および組付け工数を低減し、安価にすることができる。   (2) The HV terminals 81 and 82 are provided as part of the bus bars 81A and 82A at the ends of the bus bars 81A (81A not shown) and 82A. For this reason, the number of parts and assembly man-hours can be reduced and the cost can be reduced.

（３）二次電池装置１は、第１の封止部材１５を有する。ＨＶ端子８１、８２は、ケース本体２内を延在されて窪み部１１Ｌ、１１Ｒから露出されており、第１の封止部材１５は、上カバー３の上面３ａと上カバー３の窪み部１１Ｌ、１１Ｒとの段部を形成する側部１２ｃと、ＨＶ端子８１、８２との間に介装されている。これにより、上カバー３とＨＶ端子８１、８２とを密封することができる。   (3) The secondary battery device 1 includes the first sealing member 15. The HV terminals 81 and 82 extend through the case body 2 and are exposed from the recesses 11L and 11R. The first sealing member 15 includes the upper surface 3a of the upper cover 3 and the recess 11L of the upper cover 3. , 11R and the HV terminals 81 and 82 are interposed between the side portion 12c forming a step with the 11R. Thereby, the upper cover 3 and the HV terminals 81 and 82 can be sealed.

（４）二次電池装置１は、第２の封止部材１６および端子台６５を有し、端子台６５は、外部端子載置面となる上面６５ａと、封止面となる上面６５ｂとを有する。端子台６５の上面６５ａにＨＶ端子８１、８２が載置され、第２の封止部材１６は、端子台６５の上面６５ｂと上カバー３の窪み部１１Ｌ、１１Ｒの底部１２との間に介装されている。これにより、上カバー３の窪み部１１Ｌ、１１Ｒと端子台６５とを密封することができる。   (4) The secondary battery device 1 includes the second sealing member 16 and the terminal block 65. The terminal block 65 includes an upper surface 65a serving as an external terminal placement surface and an upper surface 65b serving as a sealing surface. Have. The HV terminals 81 and 82 are placed on the upper surface 65a of the terminal block 65, and the second sealing member 16 is interposed between the upper surface 65b of the terminal block 65 and the bottom portions 12 of the recessed portions 11L and 11R of the upper cover 3. It is disguised. Thereby, the recessed parts 11L and 11R of the upper cover 3 and the terminal block 65 can be sealed.

（５）端子台６５は、ＨＶ端子８１、８２の外周に、上面６５ａと上面６５ｂとの仕切り部となる突起部６６を有する。これにより、ＨＶ端子８１、８２の端子台６５上での位置決めが容易となり、また、第２の封止部材１６の組付けを能率的に行うことができる。   (5) The terminal block 65 has a protrusion 66 that serves as a partition between the upper surface 65a and the upper surface 65b on the outer periphery of the HV terminals 81 and 82. Thereby, the positioning of the HV terminals 81 and 82 on the terminal block 65 is facilitated, and the second sealing member 16 can be efficiently assembled.

（６）ＨＶ端子８１、８２に貫通孔１８が形成され、端子台６５に、ＨＶ端子８１、２１に貫通孔１８に対応してねじ孔６７が形成されている。このため、外部機器に接続されるＨＶケーブル先端に設けられた端子部を、ボルト等の締結部材により端子台６５のねじ孔６７に締結することが可能となる。   (6) The through holes 18 are formed in the HV terminals 81 and 82, and the screw holes 67 are formed in the terminal block 65 corresponding to the through holes 18 in the HV terminals 81 and 21. For this reason, it becomes possible to fasten the terminal part provided in the front-end | tip of the HV cable connected to an external apparatus to the screw hole 67 of the terminal block 65 with fastening members, such as a volt | bolt.

なお、上記実施形態では、ＨＶ端子８１、８２をバスバ８１Ａ、８２Ａに、該バスバ８１Ａ、８２Ａの一部として形成した構造として例示した。しかし、ＨＶ端子８１、８２は、バスバ８１Ａ、８２Ａとは別部材として作製するようにしてもよい。   In the above embodiment, the HV terminals 81 and 82 are exemplified as a structure formed on the bus bars 81A and 82A as a part of the bus bars 81A and 82A. However, the HV terminals 81 and 82 may be manufactured as separate members from the bus bars 81A and 82A.

上記実施形態では、ＨＶ端子８１、８２を、端子台６５に取付ける構造として例示した。しかし、ＨＶ端子８１、８２は、ケース本体２や、コントロール基板７を支持する押圧用カバー６等に固定用ボス部を設けて固定するようにしてもよい。   In the embodiment described above, the HV terminals 81 and 82 are exemplified as a structure that is attached to the terminal block 65. However, the HV terminals 81 and 82 may be fixed by providing a fixing boss portion on the case body 2, the pressing cover 6 that supports the control substrate 7, or the like.

上記実施形態では、ケース本体２と上カバー３とが上下に積層して配置された構造として例示した。しかし、ケース本体２と上カバー３とを横方向に配列する構造、換言すれば、上記実施形態を９０度回転した構造としてもよい。   In the said embodiment, it illustrated as a structure where the case main body 2 and the upper cover 3 were laminated | stacked up and down. However, a structure in which the case main body 2 and the upper cover 3 are arranged in the horizontal direction, in other words, the above embodiment may have a structure rotated 90 degrees.

上記実施形態では、リチウムイオン二次電池セルを有する二次電池装置を蓄電装置として例示した。しかし、本発明を、ニッケル水素電池セル、鉛電池セル、ニッケルカドミウム電池セル等、リチウムイオン二次電池セル以外の二次電池セルを有する二次電池装置に適用することができる。また、本発明を、リチウイオンキャパシタ等の蓄電素子を有する蓄電装置に適用することもできる。   In the said embodiment, the secondary battery apparatus which has a lithium ion secondary battery cell was illustrated as an electrical storage apparatus. However, the present invention can be applied to secondary battery devices having secondary battery cells other than lithium ion secondary battery cells, such as nickel metal hydride battery cells, lead battery cells, and nickel cadmium battery cells. The present invention can also be applied to a power storage device having a power storage element such as a lithium ion capacitor.

以上、本発明の実施例について詳述したが、本発明は、前記の実施例に限定されるものではなく、特許請求の範囲に記載された本発明の精神を逸脱しない範囲で、種々の設計変更を行うことができるものである。例えば、前記した実施の形態は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。さらに、各実施例の構成の一部について、他の構成の追加・削除・置換をすることが可能である。   Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Furthermore, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

１ 二次電池装置
１Ｒ 組電池
２ ケース本体
３ 上カバー
３ａ 上面
４ 二次電池セル
１１Ｌ 、１１Ｒ 窪み部
１２ 底部
１２ｃ 側部
１５ 第１の封止部材
１６ 第２の封止部材
１８ 貫通孔
２１ ＨＶ端子
４３ 正極電極
４４ 負極電極
６５ 端子台
６５ａ、６５ｂ 上面
６６ 突起部
６７ ねじ孔
８１ ＨＶ端子
８１Ａ バスバ
Ｆｃ 収納領域 DESCRIPTION OF SYMBOLS 1 Secondary battery apparatus 1R Battery assembly 2 Case main body 3 Upper cover 3a Upper surface 4 Secondary battery cell 11L, 11R Indentation part 12 Bottom part 12c Side part 15 1st sealing member 16 2nd sealing member 18 Through-hole 21 HV Terminal 43 Positive electrode 44 Negative electrode 65 Terminal block 65a, 65b Upper surface 66 Projection 67 Screw hole 81 HV terminal
81A Bus bar Fc storage area

Claims (5)

二次電池セルを複数積層させた組電池と、
前記組電池を収納し、開口を有するケースと、
前記ケースの開口を塞ぐ上カバーと、を備えた蓄電装置において、
前記上カバーは、上面と、当該上面から陥没する窪み部を有し、
前記窪み部には前記組電池と繋がる外部端子が配置され、
前記外部端子の上面は前記上カバーの上面よりも低い位置に配置されることを特徴とする蓄電装置。 An assembled battery in which a plurality of secondary battery cells are stacked;
A case containing the assembled battery and having an opening;
In an electrical storage device comprising an upper cover that closes the opening of the case,
The upper cover has an upper surface and a hollow portion recessed from the upper surface,
An external terminal connected to the assembled battery is disposed in the recess,
The power storage device, wherein an upper surface of the external terminal is disposed at a position lower than an upper surface of the upper cover. 請求項１に記載の蓄電装置において、
前記外部端子は、前記組電池と繋がるバスバーの一部として設けられることを特徴とする蓄電装置。 The power storage device according to claim 1,
The power storage device, wherein the external terminal is provided as a part of a bus bar connected to the assembled battery. 請求項２に記載の蓄電装置において、
前記窪み部にはさらに凹部が設けられ、当該凹部には前記外部端子が配置され、
前記外部端子と前記凹部の側面部との間には封止材が配置されることを特徴とする蓄電装置。 The power storage device according to claim 2,
The recess is further provided with a recess, and the external terminal is disposed in the recess.
A power storage device, wherein a sealing material is disposed between the external terminal and the side surface of the recess. 請求項３に記載の蓄電装置において、
前記組電池の端部には端子台が配置され、
前記端子台は前記外部端子を載置する載置面と、当該載置面より低い封止面を有し、
前記封止面と前記上カバーとの間には封止材が配置されることを特徴とする蓄電装置。 The power storage device according to claim 3,
A terminal block is disposed at the end of the assembled battery,
The terminal block has a mounting surface for mounting the external terminal, and a sealing surface lower than the mounting surface,
A power storage device, wherein a sealing material is disposed between the sealing surface and the upper cover. 請求項４に記載の蓄電装置において、
前記端子台は、前記外部端子の外周に連続した突起部を有することを特徴とする蓄電装置。
The power storage device according to claim 4,
The power storage device according to claim 1, wherein the terminal block has a protrusion that is continuous with an outer periphery of the external terminal.
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