JP3929617B2

JP3929617B2 - Terminal part of battery storage case in battery pack

Info

Publication number: JP3929617B2
Application number: JP26093598A
Authority: JP
Inventors: 晴夫野木; 伊智朗富澤
Original assignee: Furukawa Battery Co Ltd
Current assignee: Furukawa Battery Co Ltd
Priority date: 1998-08-31
Filing date: 1998-08-31
Publication date: 2007-06-13
Anticipated expiration: 2018-08-31
Also published as: JP2000077050A

Description

【０００１】
【発明の属する技術分野】
本発明は、電池パックにおける電池収納用ケースの端子部に関する。
【０００２】
【従来の技術】
従来の電池パックにおける電池収納用ケースの端子部は、図７に示すような構成を有する。即ち、該端子部は、電池収納用ケースＡの底面ａに端子設置用の凹窪部Ｂを設けると共にその凹窪部Ｂの底面ｂ１の中央部に少なくとも２個の正，負極端子接続用の端子孔Ｃ（一方の極性端子孔は図面に対し直交し、図示の他方の極性Ｃの前方又は後方に位置する）を併設し、該凹窪部Ｂの底面ｂ１に各端子孔の上面を閉塞して肉薄で長矩形状の端子板Ｄの一端部ｄ１を導入して載置し、その他端部ｄ２を該凹窪部Ｂの周側壁面ｂ２からその外側の該電池ケースＡの底面ａに沿いＬ字状に折り曲げて導出し、該凹窪部Ｂ内に該凹窪部Ｂの面形状と同じ形状の端子台Ｅを嵌着して該端子台Ｅと該凹窪部Ｂとの間にこれら端子板Ｄ，Ｄを挟圧固定した構成を有する。
而して、その電池収納用ケースＡの底面ａとこれと同じつら位置の該端子台Ｅの上面に単電池の複数個を直列接続した群電池Ｆを収容し、該群電池Ｆと夫々の正，負極端子板Ｄ，Ｄとをリード線（図示しない）を介して直列に接続した後、該収納ケースＡの上面にカバーを施し（図示しない）て電池パックとし、使用においては、外部の接続用端子を該電池パックの該電池収納ケースＡの底壁に穿設した端子孔Ｃ，Ｃに露出する正，負極端子を接続して使用される。
【０００３】
【発明が解決しようとする課題】
従来の上記電池パックは、その電池収納用ケースＡに形成した端子部は、そのケースＡの底壁ａに設けた該凹窪部Ｂの底面ｂ１は平面であるため、電池パックに水がかゝり、各端子孔Ｃ内の該端子板Ｄの露出部の外面に付着した場合、その水は、端子板Ｄと該底面ｂ１及び該凹窪部Ｂの周側壁面ｂ２との間の微細な間隙に侵入し、更には、毛細管現象により水を吸い上げ、電池ケースの底面ａに載置した群電池の下面に侵入して正，負極端子板Ｄ，Ｄの他端部ｄ２，ｄ２とこれらに接続されるリード坂（図示しない）との接続部の腐食をもたらし、侵入した水の量によっては、該正，負極端子板Ｄ，Ｄの他端部ｄ２，ｄ２間又はリード板間の短絡をもたらすなどの不都合があった。
【０００４】
【課題を解決するための手段】
本発明は、上記従来の課題を解決した電池パックにおける電池収納用ケースの端子部を提供するもので、電池ケースの底壁に端子設置用の凹窪部を形成すると共に該凹窪部の底面の中央部に少なくとも正，負極端子接続用の端子孔を併設し、該凹窪部の底面に該端子孔の上面を閉塞して少なくとも２枚の肉薄で長矩形状の端子板の一端部を導入して載置し、その他端部を該凹窪部の周側壁に沿い折り曲げた後、その外側の電池ケースの底面に沿い折り曲げて導出し、端子台を該凹窪部に嵌着して該凹窪部との間にこれら端子板の導入部を挟圧固定して成る電池パックにおける電池収納用ケースの端子部において、該凹窪部の底面にその中央部に併設した端子孔の外周を囲繞して環状突枠又は環状溝枠を形成し、該環状突枠部又は環状溝枠部と交叉する各端子板の個所をその突枠の横断面形状又は溝枠の横断面形状に沿って屈曲せしめた屈曲部として沿着し、該端子台を、その裏面に形成した環状溝枠又は環状突枠を該凹窪部の底面に設けた該環状突枠又は該環状溝枠に嵌合せしめた状態で該凹窪部内に嵌着し、これら端子部を挟圧固定したことを特徴とする。
更に本発明は、上記の発明において、該凹窪部の底面及び該端子台の裏面に夫々対向して設ける夫々の環状突枠又は環状溝枠を、二重に形成することを特徴とする。
【０００５】
【発明の実施の形態】
次に、本発明の実施の形態を、添付図面に基づいて説明する。
図１乃至図３は、本発明の電池パックにおける収納用ケースの端子部の実施の１例を示す。
図面で１は、電池収納用ケースを示し、合成樹脂を材料として成形される。該ケース１の底面１ａには、その１側に所定深さの方形の凹窪部２を形成する。該凹窪部２の寸法は、例えば、縦１８ｍｍ、横２５ｍｍ、深さ１ｍｍとする。その凹窪部２の底面２ａの中央部には、複数個の、図面では正極端子、負極端子及びサーミスタの一端の端子の接続用の３個の端子孔３，３，３が形成されている。
本発明によれば、該凹窪部２の底面２ａの中央部に併設したこれらの端子孔３，３，３を囲繞して、図示の例では方形の環状突枠４を形成する。該環状突枠４の枠部寸法は、例えばその高さは０．５ｍｍ、その幅は１ｍｍとする。このように環状突枠４を突設した該凹窪部２内に、長矩形の肉薄の端子板５の一端部を導入し、各端子孔３の上面を閉塞してその底面２ａ上に載置するが、その方形の環状突枠４の前後方向で対向する２辺の突枠部４ａ，４ｂと交叉する個所５ａ，５ｂで該突枠部４ａ，４ｂの横断面形状、図示の場合は、断面四角形に沿わせてコ字状に折り曲げてそのコ字上の屈曲部５ａ，５ｂとして沿着し、その他端部５ｃ，５ｃ，５ｃを該凹窪部２の周側壁部２ｂに沿わせて上向きに折り曲げた後、水平に折り曲げて該凹窪部２の外側のケース１の底面１ａの上面に沿うようにＬ字状に折り曲げて該凹窪部２の外部に導出させる。各該端子板５の肉厚は、殆ど厚さのない０．１５〜０．２ｍｍとする。
一方、該凹窪部２に嵌着して該端子板５，５，５を挟圧固定するための端子台６は、合成樹脂やゴムなどの成形品であり、該凹窪部２と略同じ寸法、形状、厚さであり、該凹窪部２に嵌着したとき、その上面は、その凹窪部２の外側のケース１の底面１ａと同じつら位置となるように成形されるが、この場合、本発明によれば、その裏面６ａに、該凹窪部２に嵌合したとき、該凹窪部２に形成した上記の環状突枠４に各端子板５，５，５のコ字状屈曲部５ａ，５ｂを含めて丁度嵌合する幅と深さを有する環状溝枠７、図示の例では方形の環状溝枠７を形成したものを用意し、これを図２〜図３（ａ），（ｂ）に示すように該凹窪部２に嵌着し、該端子台６と該凹窪部２との間にこれら端子板５，５，５を挟圧固定した場合、その互いに噛み合う環状突枠４と環状溝枠７とにより更に強固に端子板５，５，５を挟圧固定される。該端子台６の寸法は、縦１８ｍｍ、横２１ｍｍ、厚さ２ｍｍとし、その裏面に設けた該環状溝枠７の溝枠部の寸法は、例えば、幅１ｍｍ、深さ０．７ｍｍとする。該端子台６は、特に、ゴムなどの弾性を有する材料で作製された場合は、該環状溝枠７の幅寸法に融通性を生ずるので、肉薄の該端子板５の介在の有無に拘らず、該凹窪部２の底面に突設した環状突枠４に嵌合した場合に密着嵌合することができる。
【０００６】
このように構成された本発明の端子部Ｐを具備した電池収納ケース１内に、図４に示す複数個の単電池を直列に接続した群電池８を収納するが、その収納前に、端子板５，５，５のうち、少なくともその正極用端子板５の導出端部５ｃと負極用端子板５ｃの導出端部５ｃに同じ肉薄の長尺のリード板９を接続すると共にその後端部に接続された一点鎖線示の被覆リード線１０を該ケース１の前方に導き、群電池８の負極端子に接続する。この状態で群電池８を該ケース１内に収納する。この場合、端子板５及びリード板９の肉厚は、たかだか０．１５〜０．２ｍｍであるので、該端子台６の上面６ｂと該ケース１の底面１ａとは略同一平面上に在り、該群電池８は安定して収納できる。その後、該ケース１に合成樹脂製の板状カバー１１を施し且つケース１と接着剤などで結着して、電池パックに構成する。
図示の例では、電池パックの容器の該ケース１の深さは、即ち、周側壁１ａの高さは図示のように群電池８の高さよりやゝ高いものとしたが、これより低くし、該カバー１１を筐型とし、群電池８の一部を該カバー１１内に収納する形式の電池パックとしてもよいことは言うまでもない。
【０００７】
また、本発明の上記の実施例とは逆に、環状突枠４を端子台６側に設け、環状溝枠７を該凹窪部２側に設けるようにしてもよい。図５は、その実施例を示す。即ち、該凹窪部２の底壁を比較的肉厚とし、その底面２ａに方形の環状溝枠７を設け、該端子台６の裏面に方形の環状突枠４を設けた場合を示す。この場合、各端子板５は、その凹窪部２の底面２ａに設けた方形の溝枠７と交叉する個所で、即ち、その溝枠部７ａ，７ｂを横断する個所でコ字状の屈曲部５ａ，５ｂとして、その溝枠部７ａ，７ｂに沿着せしめられる。これにより、実施例１の構成と同様に下記する効果をもたらす。
【０００８】
このように構成した本発明の電池収納用ケースの端子部Ｐは、該凹窪部２の底面２ａに、その中央部に併設した複数個の端子孔３の外周を囲繞して環状突枠４又は環状溝枠７を設けたので、該端子孔３に露出する端子板５に付着した水は、該環状突枠４又は該環状溝枠７によって該凹窪部２の底面２ａの奥への侵入が可及的に防止されると共に、正，負極端子板５，５の導出端部５ｃ，５ｃとこれに接続するリード板９，９間との接触部の腐食、更に該導出部５ｃ，５ｃ間及びリード板間の短絡を未然に防ぐことができる。
また、上記したように、各端子板５は、該凹窪部２の底面２ａに設けた該環状突枠４又は該環状溝枠７と交叉する個所で、その夫々の横断面形状に沿ったコ字状の屈曲部５ａ，５ｂとし、これをその夫々の該環状突枠４の突枠部４ａ，４ｂ又は該環状溝枠７の溝枠部７ａ，７ｂに沿着し、その上面に該端子台６をその環状溝枠７又は環状突枠４を嵌合するようにしたので、各端子板５は該凹窪部２の平坦な底面２ａと端子台６の平坦な裏面６ａとによる挟圧固定に加え、相互に噛み合う環状突枠４と環状溝枠７との間に各端子板５は噛み合い係合による挟圧固定が得られ、安定堅牢な端子部Ｐをもたらす。
【０００９】
また、本発明によれば、更に上記の効果を増大せしめるため、該凹窪部２の底面２ａと該端子台６の裏面６ａに設ける環状突枠４又は環状溝部７を二重に設けるようにすることが好ましい。
図６は、その実施の１例を示す。図面で該ケース１の底面１ａに設けた該凹窪部２の底面２ａに、その中央部に併設した端子孔３，３，３の外周に方形の第１環状突枠４とその外側に少許の間隔を存して方形の第２環状突枠４とを配設する一方、該端子台６の裏面６ａに上記の第１、第２環状突枠４，４に夫々嵌合される方形の第１環状溝枠とその外側に方形の第２環状溝枠７とを配設したものである。而して、各端子孔３上に載置した端子板５は、夫々の横断面形状が角形の第１、第２環状突枠４，４の前後の突枠部４ａ，４ａ，４ｂ，４ｂと夫々交叉する個所をコ字状に屈曲させ、その屈曲部５ａ，５ａ，５ｂ，５ｂでその夫々の枠部４ａ，４ａ，４ｂ，４ｂに嵌合した状態で設置し、その上面から前記の端子台６を嵌合させ、各端子板５を挟圧固定するようにしたもので、該凹窪部２の底面２ａに二重に環状突枠４と環状溝枠７が存するため、水の侵入防止性が更に保証され、また、同時に、各端子板６の設置固定が更に増大し安定堅牢な端子部Ｐが得られる。
【００１０】
【発明の効果】
本願の請求項１に係る発明により、電池パックの端子孔に水が内部に侵入する防止効果が増大すると共に、ケース内部での端子板とリード板との接続部の腐食が防止され、また端子板間、更にはリード板間の短絡が防止され、而も端子板の挟圧固定力の増大した安定堅牢な電池パックにおける電池収納用ケースの端子部が得られる効果をもたらす。
更に、請求項２に係る発明により、前記の効果を更に増大する。
【図面の簡単な説明】
【図１】本発明の実施の１例の端子部を具備した電池パックにおける電池収納用ケースの一部を裁除した分解斜面図であり、図１（ａ）は裏面を上向きにした端子台の斜面図、図１（ｂ）は該ケースの一部を裁除した斜面図。
【図２】図１示の本発明の端子部を具備した電池パックにおける電池収納用ケースの斜面図。
【図３】図２の要部の裁断面図であり、図３（ａ）は図２のＡ−Ａ線裁断面図、図３（ｂ）は図２のＢ−Ｂ線裁断面図。
【図４】電池パックの分解斜面図であり、図４（ａ）はカバーの斜面図、図４（ｂ）は群電池の斜面図、図４（ｃ）は本発明の端子部を具備した電池収納用ケースの斜面図。
【図５】本発明の変形例の断面図。
【図６】本発明の更に変形例の端子部を具備した電池収納用ケース１の一部を裁除した分解斜面図であり、図６（ａ）は裏面を上向きにした端子台の斜面図、図６（ｂ）は該ケースの一部を裁除した斜面図。
【図７】従来の電池パックにおける電池収納用ケースに具備した端子部の裁断面図。
【符号の説明】
１電池収納用ケース２凹窪部２ａ凹窪部の底面
３端子孔４環状突枠、方形突枠４ａ，４ｂ突枠部
５端子板５ａ，５ｂ屈曲部６端子台
７環状溝枠、方形溝枠７ａ，７ｂ溝枠部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal portion of a battery storage case in a battery pack.
[0002]
[Prior art]
The terminal part of the battery storage case in the conventional battery pack has a configuration as shown in FIG. That is, the terminal portion is provided with a concave portion B for terminal installation on the bottom surface a of the battery housing case A, and at least two positive and negative terminal connection portions at the center of the bottom surface b1 of the concave portion B. Terminal holes C (one polarity terminal hole is orthogonal to the drawing and located in front of or behind the other polarity C shown in the figure) are provided, and the upper surface of each terminal hole is closed on the bottom surface b1 of the recessed portion B. Then, the one end d1 of the thin and long rectangular terminal board D is introduced and placed, and the other end d2 extends along the bottom surface a of the battery case A from the peripheral side wall surface b2 of the recess B. Fold out into an L-shape, and a terminal block E having the same shape as the surface of the concave portion B is fitted into the concave portion B, and the terminal block E and the concave portion B are interposed between the terminal block E and the concave portion B. The terminal plates D and D are clamped and fixed.
Thus, a group battery F in which a plurality of unit cells are connected in series is accommodated on the bottom surface a of the battery housing case A and the upper surface of the terminal block E at the same position as the battery case A. After connecting the positive and negative terminal plates D and D in series via lead wires (not shown), a cover is provided on the upper surface of the storage case A (not shown) to form a battery pack. The connecting terminal is used by connecting the positive and negative terminals exposed in the terminal holes C, C formed in the bottom wall of the battery storage case A of the battery pack.
[0003]
[Problems to be solved by the invention]
In the conventional battery pack, since the terminal portion formed in the battery housing case A has a flat bottom surface b1 of the recessed portion B provided on the bottom wall a of the case A, the battery pack is watered. When it adheres to the outer surface of the exposed portion of the terminal plate D in each terminal hole C, the water is fine between the terminal plate D and the peripheral wall surface b2 of the bottom surface b1 and the recessed portion B. And the other end portions d2 and d2 of the positive and negative electrode terminal plates D and D, and the other end portions d2 and d2 of the positive and negative electrode terminal plates D and D. Corrosion of the connecting portion with the lead slope (not shown) connected to the lead wire, depending on the amount of invaded water, the short circuit between the other end portions d2 and d2 of the positive and negative terminal plates D and D or between the lead plates There were inconveniences such as bringing
[0004]
[Means for Solving the Problems]
The present invention provides a terminal part of a battery housing case in a battery pack that solves the above-mentioned conventional problems, and forms a recessed part for terminal installation on the bottom wall of the battery case and also the bottom surface of the recessed part. A terminal hole for connecting at least positive and negative terminals is provided at the center of the terminal, and the upper surface of the terminal hole is closed on the bottom surface of the recessed portion to introduce one end of at least two thin and long rectangular terminal plates. The other end portion is bent along the peripheral side wall of the recessed portion, and then bent along the bottom surface of the battery case on the outer side to be led out, and the terminal block is fitted into the recessed portion, In the terminal part of the battery housing case in the battery pack in which the introduction part of these terminal plates is clamped and fixed between the recessed part, the outer periphery of the terminal hole provided in the center part on the bottom surface of the recessed part is provided. An annular projecting frame or an annular groove frame is formed to surround the annular projecting frame part or the annular groove frame part. Each terminal plate is attached as a bent portion bent along the cross-sectional shape of the projecting frame or the cross-sectional shape of the groove frame, and the terminal block is formed into an annular groove frame or ring formed on the back surface thereof. The protruding frame is fitted in the recessed portion in a state where the protruding frame is fitted to the annular protruding frame or the annular groove frame provided on the bottom surface of the recessed portion, and the terminal portions are clamped and fixed. .
Furthermore, the present invention is characterized in that, in the above-mentioned invention, each annular projecting frame or annular groove frame provided to face the bottom surface of the recessed portion and the back surface of the terminal block is formed in a double manner.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 3 show an example of an embodiment of a terminal portion of a storage case in the battery pack of the present invention.
In the drawings, reference numeral 1 denotes a battery housing case, which is molded using a synthetic resin as a material. On the bottom surface 1a of the case 1, a rectangular concave portion 2 having a predetermined depth is formed on one side thereof. The dimensions of the recess 2 are, for example, 18 mm long, 25 mm wide, and 1 mm deep. A plurality of terminal holes 3, 3, 3 for connecting a positive terminal, a negative terminal and one terminal of the thermistor are formed in the center of the bottom surface 2 a of the recessed portion 2. .
According to the present invention, a rectangular annular protruding frame 4 is formed in the illustrated example by surrounding these terminal holes 3, 3, 3 adjacent to the central portion of the bottom surface 2 a of the recessed portion 2. The frame size of the annular projecting frame 4 is, for example, 0.5 mm in height and 1 mm in width. One end portion of the long rectangular thin terminal plate 5 is introduced into the recessed portion 2 provided with the annular projecting frame 4 in this manner, and the upper surface of each terminal hole 3 is closed and placed on the bottom surface 2a. However, the cross-sectional shape of the projecting frame portions 4a and 4b at the portions 5a and 5b intersecting with the projecting frame portions 4a and 4b of two sides facing each other in the front-rear direction of the rectangular annular projecting frame 4 in the illustrated case Then, it is bent into a U-shape along a square of the cross-section and is attached as bent portions 5a, 5b on the U-shape, and the other end portions 5c, 5c, 5c are set along the peripheral side wall portion 2b of the recessed portion 2. And then bent horizontally, bent in an L shape along the upper surface of the bottom surface 1a of the case 1 outside the recessed portion 2, and led out of the recessed portion 2. The thickness of each terminal board 5 is 0.15 to 0.2 mm with little thickness.
On the other hand, the terminal block 6 that is fitted into the recessed portion 2 and clamps and fixes the terminal plates 5, 5, 5 is a molded product such as synthetic resin or rubber, and is substantially the same as the recessed portion 2. Although it has the same dimensions, shape, and thickness, and when it is fitted in the recessed portion 2, its upper surface is shaped so as to be in the same icing position as the bottom surface 1 a of the case 1 outside the recessed portion 2. In this case, according to the present invention, when the back surface 6a is fitted into the recessed portion 2, the above-described annular protruding frame 4 formed in the recessed portion 2 is provided with each of the terminal plates 5, 5, 5 An annular groove frame 7 having a width and a depth that fits just including the U-shaped bent portions 5a and 5b, in the example shown, is formed with a rectangular annular groove frame 7, which is shown in FIGS. When the terminal plates 5, 5 and 5 are clamped and fixed between the terminal block 6 and the recessed portion 2 as shown in 3 (a) and 3 (b). That bite each other It is more firmly clamping fixing the terminal plate 5,5,5 by an annular 突枠 4 and the annular groove frame 7. The dimensions of the terminal block 6 are 18 mm in length, 21 mm in width, and 2 mm in thickness, and the dimensions of the groove frame portion of the annular groove frame 7 provided on the back surface thereof are, for example, 1 mm in width and 0.7 mm in depth. In particular, when the terminal block 6 is made of an elastic material such as rubber, the width of the annular groove frame 7 is flexible. Therefore, regardless of whether the thin terminal plate 5 is interposed or not. In the case of fitting to the annular projecting frame 4 projecting from the bottom surface of the recessed portion 2, it can be tightly fitted.
[0006]
In the battery storage case 1 having the terminal portion P of the present invention configured as described above, the group battery 8 in which a plurality of single cells shown in FIG. 4 are connected in series is stored. Of the plates 5, 5 and 5, the same thin long lead plate 9 is connected to at least the lead-out end portion 5c of the positive electrode terminal plate 5 and the lead-out end portion 5c of the negative electrode terminal plate 5c, and at the rear end portion thereof. The connected covered lead wire 10 indicated by the one-dot chain line is guided to the front of the case 1 and connected to the negative terminal of the battery group 8. In this state, the group battery 8 is housed in the case 1. In this case, since the thickness of the terminal plate 5 and the lead plate 9 is at most 0.15 to 0.2 mm, the upper surface 6b of the terminal block 6 and the bottom surface 1a of the case 1 are on substantially the same plane, The group battery 8 can be stored stably. Thereafter, a synthetic resin plate cover 11 is applied to the case 1 and bonded to the case 1 with an adhesive or the like to form a battery pack.
In the illustrated example, the depth of the case 1 of the battery pack container, that is, the height of the peripheral side wall 1a is slightly higher than the height of the group battery 8 as shown in the figure, but is lower than this, It goes without saying that the cover 11 may be a casing type and a battery pack in which a part of the group battery 8 is housed in the cover 11 may be used.
[0007]
In contrast to the above-described embodiment of the present invention, the annular protruding frame 4 may be provided on the terminal block 6 side, and the annular groove frame 7 may be provided on the recessed portion 2 side. FIG. 5 shows an example thereof. That is, a case is shown in which the bottom wall of the recessed portion 2 is made relatively thick, a square annular groove frame 7 is provided on the bottom surface 2a, and a square annular projection frame 4 is provided on the back surface of the terminal block 6. In this case, each terminal plate 5 is bent in a U-shape at a location where it intersects with the rectangular groove frame 7 provided on the bottom surface 2a of the recessed portion 2, that is, at a location crossing the groove frame portions 7a and 7b. As the portions 5a and 5b, they are attached to the groove frame portions 7a and 7b. Thereby, the following effects are brought about similarly to the configuration of the first embodiment.
[0008]
The terminal portion P of the battery housing case of the present invention configured as described above has an annular protruding frame 4 that surrounds the outer periphery of a plurality of terminal holes 3 provided in the center on the bottom surface 2a of the recessed portion 2. Alternatively, since the annular groove frame 7 is provided, the water adhering to the terminal plate 5 exposed to the terminal hole 3 is transferred to the back of the bottom surface 2a of the recessed portion 2 by the annular protrusion frame 4 or the annular groove frame 7. Intrusion is prevented as much as possible, and corrosion of the contact portion between the leading end portions 5c, 5c of the positive and negative terminal plates 5, 5 and the lead plates 9, 9 connected to the leading end portions 5c, 5c is further prevented. Short circuit between 5c and between lead plates can be prevented beforehand.
Further, as described above, each terminal plate 5 follows the cross-sectional shape of each of them at a location where it intersects with the annular projecting frame 4 or the annular groove frame 7 provided on the bottom surface 2 a of the recessed portion 2. The U-shaped bent portions 5a and 5b are attached to the projecting frame portions 4a and 4b of the annular projecting frame 4 or the groove frame portions 7a and 7b of the annular groove frame 7 and Since the terminal block 6 is fitted with the annular groove frame 7 or the annular projecting frame 4, each terminal plate 5 is sandwiched between the flat bottom surface 2a of the recessed portion 2 and the flat back surface 6a of the terminal block 6. In addition to the pressure fixation, each terminal plate 5 can be clamped and fixed by meshing engagement between the annular projecting frame 4 and the annular groove frame 7 which are engaged with each other, thereby providing a stable and robust terminal portion P.
[0009]
In addition, according to the present invention, in order to further increase the above effect, the annular projecting frame 4 or the annular groove 7 provided on the bottom surface 2a of the recessed portion 2 and the back surface 6a of the terminal block 6 is provided in a double manner. It is preferable to do.
FIG. 6 shows an example of the implementation. In the drawing, a rectangular first annular protruding frame 4 on the outer periphery of the terminal holes 3, 3, 3 provided along the center of the bottom surface 2 a of the recessed portion 2 provided on the bottom surface 1 a of the case 1 and a small amount of permission on the outside thereof. The rectangular second annular projecting frame 4 is disposed with an interval of 2 mm, while the square and the second annular projecting frames 4 and 4 are fitted to the back surface 6a of the terminal block 6 respectively. A first annular groove frame and a square second annular groove frame 7 are disposed outside the first annular groove frame. Thus, the terminal plate 5 placed on each terminal hole 3 has the projecting frame portions 4a, 4a, 4b, 4b before and after the first and second annular projecting frames 4, 4 each having a square cross section. Are bent in a U-shape and installed in a state where the bent portions 5a, 5a, 5b, and 5b are fitted to the respective frame portions 4a, 4a, 4b, and 4b. The terminal block 6 is fitted and each terminal plate 5 is clamped and fixed. Since the annular projecting frame 4 and the annular groove frame 7 exist on the bottom surface 2a of the concave portion 2, Intrusion prevention is further ensured, and at the same time, the installation and fixing of each terminal plate 6 is further increased, and a stable and robust terminal portion P is obtained.
[0010]
【The invention's effect】
According to the first aspect of the present invention, the effect of preventing water from entering the terminal hole of the battery pack is increased, and corrosion of the connecting portion between the terminal plate and the lead plate inside the case is prevented. A short circuit between the plates and further between the lead plates is prevented, and the terminal portion of the battery housing case in the stable and robust battery pack in which the clamping force of the terminal plate is increased is obtained.
Furthermore, the above-described effect is further increased by the invention according to claim 2.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a battery pack provided with a terminal portion according to an embodiment of the present invention, in which a part of a battery storage case is cut away, and FIG. 1 (a) is a terminal block with a back surface facing upward; FIG. 1B is a perspective view of a part of the case cut away.
FIG. 2 is a perspective view of a battery storage case in the battery pack having the terminal portion of the present invention shown in FIG.
3 is a cross-sectional view of the main part of FIG. 2, in which FIG. 3 (a) is a cross-sectional view along line AA in FIG. 2, and FIG. 3 (b) is a cross-sectional view along line BB in FIG.
4 is an exploded perspective view of a battery pack, FIG. 4 (a) is a perspective view of a cover, FIG. 4 (b) is a perspective view of a group battery, and FIG. 4 (c) is provided with a terminal portion of the present invention. The slope view of the battery storage case.
FIG. 5 is a cross-sectional view of a modification of the present invention.
FIG. 6 is an exploded perspective view of a battery housing case 1 having a terminal portion according to a further modification of the present invention, in which a part thereof is cut away, and FIG. 6 (a) is a perspective view of a terminal block with the back surface facing upward. FIG. 6B is a perspective view of a part of the case cut away.
FIG. 7 is a cutaway view of a terminal portion provided in a battery housing case in a conventional battery pack.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery storage case 2 Recessed part 2a Bottom face of recessed part 3 Terminal hole 4 Annular protrusion frame, square protrusion frame 4a, 4b Projection frame part 5 Terminal plate 5a, 5b Bending part 6 Terminal block 7 Annular groove frame, rectangular groove Frame 7a, 7b Groove frame

Claims

電池ケースの底壁に端子設置用の凹窪部を形成すると共に該凹窪部の底面の中央部に少なくとも正，負極端子接続用の端子孔を併設し、該凹窪部の底面に該端子孔の上面を閉塞して少なくとも２枚の肉薄で長矩形状の端子板の一端部を導入して載置し、その他端部を該凹窪部の周側壁に沿い折り曲げた後、その外側の電池ケースの底面に沿い折り曲げて導出し、端子台を該凹窪部に嵌着して該凹窪部との間にこれら端子板の導入部を挟圧固定して成る電池パックにおける電池収納用ケースの端子部において、該凹窪部の底面にその中央部に併設した端子孔の外周を囲繞して環状突枠又は環状溝枠を形成し、該環状突枠部又は環状溝枠部と交叉する各端子板の個所をその突枠の横断面形状又は溝枠の横断面形状に沿って屈曲せしめた屈曲部として沿着し、該端子台を、その裏面に形成した環状溝枠又は環状突枠を該凹窪部の底面に設けた該環状突枠又は該環状溝枠に嵌合せしめた状態で該凹窪部内に嵌着し、これら端子部を挟圧固定したことを特徴とする電池パックにおける電池収納用ケースの端子部。A concave portion for terminal installation is formed on the bottom wall of the battery case, and a terminal hole for connecting at least positive and negative terminals is provided at the center of the bottom surface of the concave portion, and the terminal is provided on the bottom surface of the concave portion. The upper surface of the hole is closed, and one end of at least two thin and long rectangular terminal plates are introduced and placed, and the other end is bent along the peripheral side wall of the recessed portion, and then the battery outside thereof Batteries for battery storage in battery packs formed by bending along the bottom surface of the case, fitting the terminal block into the recessed portions, and fixing the terminal plate introduction portions between the recessed portions. In this terminal portion, an annular protrusion frame or an annular groove frame is formed surrounding the outer periphery of the terminal hole provided in the center of the bottom surface of the recessed portion, and intersects with the annular protrusion frame portion or the annular groove frame portion. Each terminal plate is a bent portion bent along the cross-sectional shape of the projecting frame or the cross-sectional shape of the groove frame. The terminal block is attached to the annular groove frame or annular protrusion frame formed on the back surface of the terminal block in a state where the terminal block is fitted to the annular protrusion frame or the annular groove frame provided on the bottom surface of the recessed portion. A terminal part of a battery housing case in a battery pack, characterized in that the terminal part is fitted into the part and the terminal parts are clamped and fixed.

該凹窪部の底面及び該端子台の裏面に夫々対向して設ける夫々の環状突枠又は環状溝枠を、二重に形成することを特徴とする請求項１記載の電池パックにおける電池収納用ケースの端子部。2. The battery pack in the battery pack according to claim 1, wherein each of the annular projecting frame or the annular groove frame provided opposite to the bottom surface of the recessed portion and the back surface of the terminal block is formed in double. The terminal part of the case.