JP4993935B2 - Assembled battery - Google Patents

Assembled battery Download PDF

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JP4993935B2
JP4993935B2 JP2006103055A JP2006103055A JP4993935B2 JP 4993935 B2 JP4993935 B2 JP 4993935B2 JP 2006103055 A JP2006103055 A JP 2006103055A JP 2006103055 A JP2006103055 A JP 2006103055A JP 4993935 B2 JP4993935 B2 JP 4993935B2
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parallel
case
battery
batteries
lead plate
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JP2007280679A (en
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秀世 森田
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Sanyo Electric 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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Description

本発明は、多数の電池を平行な姿勢で多段多列に配設し、複数の電池を並列に接続し、さらに、並列に接続している電池をさらに直列に接続してなる、電池を多直列、多並列に接続してホルダーケースに収納している組電池に関する。   In the present invention, a number of batteries are arranged in a multi-stage multi-row in a parallel posture, a plurality of batteries are connected in parallel, and further, batteries connected in parallel are further connected in series. The present invention relates to an assembled battery that is connected in series and in multiple parallels and stored in a holder case.

組電池は、並列に接続する電池の個数を多くして出力電流を大きくでき、また、直列に接続する電池の個数で出力電圧を高くできる。このことから、大出力が要求される用途、たとえば自転車、オートバイ、工具、無停電電源装置、自動車等に使用される組電池は、複数の電池を並列に接続し、さらに、これを直列に接続して出力を大きくしている。この構造の組電池は、用途によって内蔵する電池の個数を変化させる必要があるので、電池の個数を変更する設計変更を簡単にして、用途に最適な組電池を安価に多量生産できることが大切である。本発明者は、このことを実現することを目的として、図１に示す構造の組電池を開発した。（特許文献１参照）
特開２００５−５６７２１号公報 The assembled battery can increase the output current by increasing the number of batteries connected in parallel, and can increase the output voltage by the number of batteries connected in series. For this reason, battery packs used in applications that require high output, such as bicycles, motorcycles, tools, uninterruptible power supplies, automobiles, etc., connect multiple batteries in parallel and connect them in series. To increase the output. Because it is necessary to change the number of built-in batteries depending on the application, it is important to simplify the design change to change the number of batteries and to produce the optimum assembled battery for the application at low cost in large quantities. is there. The present inventor has developed an assembled battery having the structure shown in FIG. 1 for the purpose of realizing this. (See Patent Document 1)
JP 2005-56721 A

この組電池は、縦横に配列する電池９１を複数の並列ユニット９６に分割している。各々の並列ユニット９６は、複数の電池９１を同じ方向に複数列に並べ、電池両端の電極にリード板９５を接続して並列に接続している。並列ユニット９６の間には板状のスペーサー９７を配設している。並列ユニット９６のリード板９５は、片面に垂直に配置する回路基板９４に連結している。この構造で回路基板９４と、並列ユニット９６を連結して電池ブロック９３とし、この電池ブロック９３を外ケース９２に収納している。   In this assembled battery, batteries 91 arranged vertically and horizontally are divided into a plurality of parallel units 96. In each parallel unit 96, a plurality of batteries 91 are arranged in a plurality of rows in the same direction, and lead plates 95 are connected to electrodes at both ends of the batteries to be connected in parallel. A plate-like spacer 97 is disposed between the parallel units 96. The lead plate 95 of the parallel unit 96 is connected to a circuit board 94 arranged perpendicular to one side. With this structure, the circuit board 94 and the parallel unit 96 are connected to form a battery block 93, and the battery block 93 is housed in the outer case 92.

図１の組電池は、収納する電池の個数の変更を簡単にできる。しかしながら、多数の電池を収納する組電池は、全体が重くなるのでより強靭な強度が要求され、さらに、電池の安全性をも向上させる必要がある。出力の大きい用途に使用される組電池は、電池の収納本数が多くなって重くなり、また、電池の発熱量が多くなって熱暴走する等の確率が高くなるからである。   The assembled battery of FIG. 1 can easily change the number of batteries to be stored. However, an assembled battery that accommodates a large number of batteries becomes heavier as a whole, so that a stronger strength is required, and further, it is necessary to improve the safety of the battery. This is because an assembled battery used for an application with a large output becomes heavier due to an increase in the number of batteries stored therein, and a probability that the heat generation of the battery increases and a thermal runaway increases.

本発明は、さらに以上の欠点を解決することを目的に開発されたものである。本発明の重要な目的は、多数の電池を収納し、かつ収納する電池の個数の変更を簡単にでき、さらに多量の電池を収納して強靭な一体構造に連結でき、また安全性をも向上できる組電池を提供することにある。   The present invention has been developed for the purpose of solving the above-mentioned drawbacks. An important object of the present invention is to store a large number of batteries, change the number of batteries to be stored easily, store a large number of batteries and connect them to a strong integrated structure, and improve safety. It is to provide a battery pack that can be used.

本発明の組電池は、前述の目的を達成するために以下の構成を備える。
組電池は、複数本の電池１を互いに平行な姿勢で、複数段で複数列に収納しているホルダーケース２と、このホルダーケース２に収納される電池１に電気接続している回路基板４とを備える。ホルダーケース２は、内蔵する複数本の電池１を並列に接続してなる複数の並列ケース３に分割すると共に、複数に分割された並列ケース３を段方向に積層して互いに連結している。さらに、各々の並列ケース３には、複数本の電池１を、正負の電極の向きを同方向として一段に並べて収納して並列ユニット６としている。並列ユニット６は、並列ケース３に収納している各々の電池１の電極にリード板５を連結して、リード板５でもって並列ケース３に収納する複数本の電池１を互いに並列に接続している。さらに、並列ユニット６は、並列ケース３からリード板５を突出させて接続部５Ａを設けている。組電池は、隣接する並列ユニット６を、リード板５の接続部５Ａを回路基板４の対向面に配設して積層すると共に、リード板５の接続部５Ａを、直接又は隣の並列ユニット６の接続部５Ａを介して回路基板４に連結して、リード板５と回路基板４を介して積層される各々の並列ユニット６を一体的に連結している。 The assembled battery of the present invention has the following configuration in order to achieve the above-described object.
The assembled battery includes a holder case 2 in which a plurality of batteries 1 are stored in a plurality of rows in parallel with each other, and a circuit board 4 that is electrically connected to the batteries 1 stored in the holder case 2. With. The holder case 2 is divided into a plurality of parallel cases 3 formed by connecting a plurality of built-in batteries 1 in parallel, and the plurality of parallel cases 3 are stacked in the step direction and connected to each other. Furthermore, in each parallel case 3, a plurality of batteries 1 are accommodated in a single row with the positive and negative electrodes oriented in the same direction to form parallel units 6. The parallel unit 6 connects the lead plate 5 to the electrode of each battery 1 housed in the parallel case 3, and connects the plurality of batteries 1 housed in the parallel case 3 with the lead plate 5 in parallel with each other. ing. Further, the parallel unit 6 is provided with a connecting portion 5 </ b> A by projecting the lead plate 5 from the parallel case 3. In the assembled battery, adjacent parallel units 6 are stacked with the connecting portions 5A of the lead plates 5 disposed on the opposing surface of the circuit board 4, and the connecting portions 5A of the lead plates 5 are directly or directly adjacent to the parallel units 6. Are connected to the circuit board 4 via the connecting portion 5A, and the parallel units 6 stacked together via the lead plate 5 and the circuit board 4 are integrally connected.

本発明の組電池は、回路基板４を収納する基板ホルダー７を備えて、この基板ホルダー７と並列ユニット６を嵌着構造で定位置に連結することができる。さらに、本発明の組電池は、並列ケース３の基板ホルダー連結側との反対側に連結プレート８を配設し、多段に積層して連結している複数の並列ケース３を、基板ホルダー７と連結プレート８の間に配設して、並列ケース３を基板ホルダー７と連結プレート８の両方に連結することができる。   The assembled battery of the present invention includes a substrate holder 7 that accommodates the circuit board 4, and the substrate holder 7 and the parallel unit 6 can be connected to a fixed position by a fitting structure. Furthermore, the assembled battery of the present invention has a connecting plate 8 disposed on the opposite side of the parallel case 3 to the substrate holder connecting side, and a plurality of parallel cases 3 stacked and connected in multiple stages are connected to the substrate holder 7. Arranged between the connecting plates 8, the parallel case 3 can be connected to both the substrate holder 7 and the connecting plate 8.

本発明の組電池は、隣接する並列ケース３を、互いに嵌着構造で定位置に連結して積層することができる。また、本発明の組電池は、隣接する並列ケース３を両面接着テープで接着して積層することができる。   In the assembled battery of the present invention, adjacent parallel cases 3 can be stacked by being connected to each other in a fixed position with a fitting structure. Moreover, the assembled battery of this invention can adhere | attach and laminate | stack the adjacent parallel case 3 with a double-sided adhesive tape.

本発明の組電池は、並列ケース３に、収納する電池１の間に配設されるスペーサーリブ１４を内面に突出して設けることができる。   In the assembled battery of the present invention, spacer ribs 14 disposed between the batteries 1 to be housed can be provided in the parallel case 3 so as to protrude from the inner surface.

本発明の組電池は、並列ケース３に収納する電池１を円筒型電池とし、並列ケース３は、収納する円筒型電池の外面に沿う凹凸面に側面プレート３ａを成形し、隣接して配設される並列ケース３を、互いに側面プレート３ａの凹部に凸部が位置するように積層することができる。   In the assembled battery of the present invention, the battery 1 accommodated in the parallel case 3 is a cylindrical battery, and the parallel case 3 is formed by forming a side plate 3a on the uneven surface along the outer surface of the cylindrical battery to be accommodated. The juxtaposed case 3 can be stacked such that the convex portions are located in the concave portions of the side surface plate 3a.

本発明の組電池は、リード板５として、金属板を溝形に折曲加工して、電池１の外装缶を溝内に入れて、外装缶に接続される電極をリード板５に接続することができる。   In the assembled battery of the present invention, as a lead plate 5, a metal plate is bent into a groove shape, the outer can of the battery 1 is placed in the groove, and an electrode connected to the outer can is connected to the lead plate 5. be able to.

本発明の組電池は、並列ケース３の内部に絶縁樹脂１７を充填して、電池１を並列ケース３の内部にポッティングすることができる。   The assembled battery of the present invention can be potted in the parallel case 3 by filling the parallel case 3 with the insulating resin 17.

本発明の組電池は、収納する電池の個数変更を簡単にしながら多量の電池を収納し、しかも、全体を強靭な一体構造にできる特徴がある。それは、本発明の組電池が、複数の電池をリード板で並列に接続すると共に、これを並列ケースに入れて並列ユニットとし、さらに複数の並列ユニットをリード板で回路基板に連結して、一体構造に連結しているからである。とくに、この構造の組電池は、電池を多段、多列に収納して電池重量が相当に重くなっても耐衝撃強度を強くできる特徴がある。それは、電池を一段に並べて並列ケースに収納して並列ユニットとし、これを多段に積層していることから、電池の重量を並列ユニットに分散して支持できるからである。また、本発明の組電池は、電池を並列ユニットに分散して収納して安全性を向上できる。それは、いずれかの電池が熱暴走するときに、熱暴走の誘発を並列ユニットで阻止できるからである。   The assembled battery of the present invention is characterized in that it can accommodate a large amount of batteries while simplifying the change of the number of batteries to be accommodated, and that the entire battery can have a strong integrated structure. That is, the assembled battery of the present invention connects a plurality of batteries in parallel with lead plates, puts them in a parallel case to form a parallel unit, and further connects the plurality of parallel units to the circuit board with lead plates. This is because it is linked to the structure. In particular, the assembled battery having this structure is characterized in that the impact strength can be increased even if the batteries are stored in multiple stages and in multiple rows and the weight of the battery is considerably increased. This is because the batteries are arranged in a row and housed in a parallel case to form a parallel unit, which is stacked in multiple stages, so that the weight of the battery can be distributed and supported in the parallel unit. Moreover, the assembled battery of this invention can disperse | distribute and accommodate a battery in a parallel unit, and can improve safety | security. This is because when one of the batteries becomes thermal runaway, the parallel unit can prevent the induction of thermal runaway.

以下、本発明の実施例を図面に基づいて説明する。ただし、以下に示す実施例は、本発明の技術思想を具体化するための組電池を例示するものであって、本発明は組電池を以下のものに特定しない。   Embodiments of the present invention will be described below with reference to the drawings. However, the example shown below illustrates the assembled battery for embodying the technical idea of the present invention, and the present invention does not specify the assembled battery as follows.

さらに、この明細書は、特許請求の範囲を理解しやすいように、実施例に示される部材に対応する番号を、「特許請求の範囲」および「課題を解決するための手段の欄」に示される部材に付記している。ただ、特許請求の範囲に示される部材を、実施例の部材に特定するものでは決してない。   Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

図２と図６に示す組電池は、複数本の電池１を互いに平行な姿勢で、複数段で複数列に収納するホルダーケース２と、このホルダーケース２に収納される電池１に電気接続している回路基板４とを備える。さらに、図６の組電池は、回路基板４を基板ホルダー７に収納している。これ等の図に示す組電池は、複数の並列ユニット６と回路基板４とを一体構造に連結して電池のコアパック１０としている。図５の組電池は、電池のコアパック１０を外装ケース９に収納している。ただ、本発明の組電池は、電池のコアパックを必ずしも外装ケースに収納する必要はない。とくに、機器に組み込まれる組電池は、コアパックの状態で機器に内蔵することができる。また、外装ケースに収納することなく、電池のコアパックの表面を熱収縮フィルム等の絶縁フィルムで被覆して組電池とすることもできる。   The assembled battery shown in FIG. 2 and FIG. 6 is electrically connected to a holder case 2 in which a plurality of batteries 1 are stored in a plurality of rows in a plurality of rows in parallel with each other, and a battery 1 stored in the holder case 2. Circuit board 4. Further, in the assembled battery of FIG. 6, the circuit board 4 is accommodated in the board holder 7. In the assembled battery shown in these drawings, a plurality of parallel units 6 and a circuit board 4 are connected in an integrated structure to form a battery core pack 10. In the battery pack of FIG. 5, the battery core pack 10 is housed in an outer case 9. However, the assembled battery of the present invention does not necessarily contain the battery core pack in the outer case. In particular, the assembled battery incorporated in the device can be incorporated in the device in a core pack state. Further, the battery core pack surface can be covered with an insulating film such as a heat-shrink film without being housed in an outer case.

組電池は、ホルダーケース２を複数の並列ケース３に分割している。並列ケース３は、プラスチック等の絶縁材を成形して製作される。並列ケース３は、互いに並列に接続している複数本の電池１を内蔵している。複数に分割された並列ケース３は、段方向（図において上下方向）に積層され、上下の並列ケース３を互いに連結している。   In the assembled battery, the holder case 2 is divided into a plurality of parallel cases 3. The parallel case 3 is manufactured by molding an insulating material such as plastic. The parallel case 3 contains a plurality of batteries 1 connected in parallel to each other. The parallel cases 3 divided into a plurality are stacked in the step direction (vertical direction in the figure) and connect the upper and lower parallel cases 3 to each other.

さらに、各々の並列ケース３は、複数本の電池１を、正負の電極の向きが同方向を向く姿勢で一段に並べて収納している。並列ケース３に収納される各々の電池１の電極にはリード板５を連結して、リード板５でもって並列ケース３に収納している複数本の電池１を互いに並列に接続して、並列ユニット６としている。さらに、リード板５は、並列ケース３に収納する電池１の列方向（図２と図６において水平方向）に並列ケース３から突出して、突出部を接続部５Ａとしている。   Further, each parallel case 3 accommodates a plurality of batteries 1 arranged in a row with the orientation of the positive and negative electrodes facing the same direction. A lead plate 5 is connected to the electrode of each battery 1 accommodated in the parallel case 3, and a plurality of batteries 1 accommodated in the parallel case 3 are connected in parallel with the lead plate 5, and are connected in parallel. Unit 6 is used. Furthermore, the lead plate 5 protrudes from the parallel case 3 in the column direction (horizontal direction in FIGS. 2 and 6) of the batteries 1 housed in the parallel case 3, and the protruding portion serves as a connection portion 5A.

図２の組電池の並列ユニット６と、並列ユニット６に収納する電池１を図３と図４に示す。図３の並列ユニット６は、並列ケース３を、一段の電池１を収納できる箱形にプラスチックで成形している。この形状の並列ケース３は、電池１を挿入する部分を開口する箱形の本体部３Ａと、この本体部３Ａの開口部を閉塞する蓋材３Ｂとで構成する。この構造の並列ケース３は、図４に示すようにリード板５を連結した電池１を本体部３Ａに挿入し、その後、開口部を蓋材３Ｂで閉塞して、閉鎖構造の内部に電池１を収納できる。ただし、本体部は、開口部を必ずしも蓋材で閉塞する必要はない。リード板５は、スポット溶接等の抵抗溶接、あるいはレーザー溶接等の方法で電池１の電極に連結される。   The parallel unit 6 of the assembled battery of FIG. 2 and the battery 1 housed in the parallel unit 6 are shown in FIG. 3 and FIG. In the parallel unit 6 of FIG. 3, the parallel case 3 is formed of plastic in a box shape that can store one battery 1. The parallel case 3 having this shape includes a box-shaped main body 3A that opens a portion into which the battery 1 is inserted, and a lid member 3B that closes the opening of the main body 3A. As shown in FIG. 4, the parallel case 3 having this structure inserts the battery 1 connected with the lead plate 5 into the main body 3 </ b> A, and then closes the opening with the lid member 3 </ b> B. Can be stored. However, the main body does not necessarily need to close the opening with a lid. The lead plate 5 is connected to the electrode of the battery 1 by resistance welding such as spot welding or laser welding.

図２と図３の並列ケース３は、外側を平面とする箱形に成形しており、これを電池１の段方向に積層してホルダーケース２としている。この構造の並列ケース３は、隣接する並列ケース３を面接触状態で、広い面積で接触する状態に積層できる。このため、隣接する並列ケース３を優れた耐振強度で連結できる。さらに、この構造の組電池は、段方向に積層している並列ケース３の対向面を両面接着テープで接着して、定位置に連結することができる。   The parallel case 3 of FIGS. 2 and 3 is formed in a box shape with the outside as a plane, and this is laminated in the step direction of the battery 1 to form a holder case 2. The parallel case 3 having this structure can be laminated in a state where the adjacent parallel cases 3 are in contact with each other over a wide area. For this reason, the adjacent parallel cases 3 can be connected with excellent vibration resistance. Furthermore, the assembled battery having this structure can be connected to a fixed position by adhering opposing surfaces of the parallel cases 3 stacked in the step direction with a double-sided adhesive tape.

図６の組電池は、スペース効率を高くするために、並列ユニット６の多段に配列される電池１の間にできる谷間に、隣の並列ユニット６の電池１を配置する。このことを実現するために、並列ケース３の両側に配置する一対の側面プレート３ａを、収納する円筒型電池１の外面に沿う凹凸面としている。一対の側面プレート３ａの内形は、円筒型電池１を分離して挿入できる形状、すなわち、円筒型電池１の外径よりもわずかに大きな曲率半径の湾曲面としている。一対の側面プレート３ａは、両端を開口している。この並列ケース３は、一対の側面プレート３ａの間に電池１を挿入する状態で、電池端部の電極にリード板５をスポット溶接やレーザー溶接等の方法で溶接して連結する。この並列ケース３は、一対の側面プレート３ａの間に電池１を挿入した後、電池両端の電極にリード板５を連結する。ただし、複数の電池１の一端にリード板５を連結する状態で、電池１を一対の側面プレート３ａの間に挿入することもできる。この並列ケース３は、一対の側面プレート３ａの間に電池１を挿入した後、電池１の他端の電極にリード板５を連結する。   In the assembled battery of FIG. 6, the battery 1 of the adjacent parallel unit 6 is arranged in a valley formed between the batteries 1 arranged in multiple stages of the parallel unit 6 in order to increase space efficiency. In order to realize this, the pair of side surface plates 3 a disposed on both sides of the parallel case 3 is formed as an uneven surface along the outer surface of the cylindrical battery 1 to be accommodated. The inner shape of the pair of side plates 3a is a shape that allows the cylindrical battery 1 to be inserted separately, that is, a curved surface having a slightly larger curvature radius than the outer diameter of the cylindrical battery 1. The pair of side surface plates 3a are open at both ends. In this parallel case 3, the battery 1 is inserted between the pair of side plates 3 a, and the lead plate 5 is welded and connected to the electrode at the end of the battery by a method such as spot welding or laser welding. In this parallel case 3, after the battery 1 is inserted between the pair of side plates 3a, the lead plate 5 is connected to the electrodes at both ends of the battery. However, the battery 1 can also be inserted between the pair of side plates 3a in a state where the lead plate 5 is connected to one end of the plurality of batteries 1. In this parallel case 3, the battery 1 is inserted between the pair of side plates 3 a, and then the lead plate 5 is connected to the electrode at the other end of the battery 1.

図６の組電池は、隣接する並列ケース３の対向面に側面プレート３ａの凹凸によって、凹部溝と凸条が交互にできる。多段に積層される並列ケース３は、隣接する並列ケース３の凹部溝に凸条を案内して、電池１を俵積み状態で多段多列に配列する。この並列ケース３は、図６の一部拡大図に示すように、嵌着構造で定位置にしっかりと連結している。図の嵌着構造は、互いに連結されるフック状の凸条１１を表面に一体的に成形して設けている。フック状の凸条１１を連結して、隣接する並列ケース３は嵌着構造で定位置に、外れないようにしっかりと連結される。   In the assembled battery of FIG. 6, the concave grooves and the convex stripes can be alternately formed by the unevenness of the side plate 3 a on the opposing surface of the adjacent parallel case 3. The parallel cases 3 stacked in multiple stages guide the protrusions into the recessed grooves of the adjacent parallel cases 3 and arrange the batteries 1 in a multi-stage multi-row in a stacked state. As shown in the partially enlarged view of FIG. 6, the parallel case 3 is firmly connected to a fixed position with an fitting structure. The fitting structure shown in the figure is formed by integrally forming hook-shaped ridges 11 connected to each other on the surface. The hook-like ridges 11 are connected, and the adjacent parallel cases 3 are firmly connected to each other in a fixed position by the fitting structure so as not to come off.

図６の並列ケース３は、側面プレート３ａの表面にフック状の凸条１１を設けて、隣接する並列ケース３を連結するが、嵌着構造で並列ケースを連結する機構は、図２の形状の並列ケース３にも利用できる。図７の並列ケース３は、互いに当接する面に嵌着構造の連結部１２を設けて、定位置に連結される。この嵌着構造は、たとえば一方に凹部１２Ａを、他方には凹部１２Ａに嵌着される凸部１２Ｂを設け、凸部１２Ｂを凹部１２Ａに入れて定位置に連結される。また、互いに嵌着して連結される凹部と凸部をアンダーカット状として、凹部の開口部を狭くする構造とすることもできる。この嵌着構造は、凸部を凹部に抜けないように連結して、隣接する並列ケースを嵌着構造で外れないように、あるいは外れ難いように連結できる。   The parallel case 3 of FIG. 6 is provided with hook-like ridges 11 on the surface of the side plate 3a to connect the adjacent parallel cases 3, but the mechanism for connecting the parallel cases with the fitting structure is the shape of FIG. It can also be used for the parallel case 3. The parallel case 3 in FIG. 7 is connected to a fixed position by providing a connecting portion 12 having a fitting structure on the surfaces abutting each other. In this fitting structure, for example, a concave portion 12A is provided on one side, and a convex portion 12B that is fitted to the concave portion 12A is provided on the other side, and the convex portion 12B is inserted into the concave portion 12A and connected to a fixed position. Moreover, it can also be set as the structure which narrows the opening part of a recessed part by making the recessed part and convex part which are mutually connected and connected into an undercut shape. In this fitting structure, the convex portions can be connected so as not to come out into the concave portion, and the adjacent parallel cases can be connected so as not to be detached by the fitting structure or to be difficult to come off.

また、図６の組電池は、隣接する並列ケース３を、凹部溝に凸条を案内して積層できるように、特定の並列ケース３、たとえば偶数段又は奇数段に積層される並列ケース３に位置調整突出部１３を設けている。図の組電池は、偶数段に積層される並列ケース３に位置調整突出部１３を設けている。図の並列ケース３は、位置調整突出部１３を連結プレート８の嵌入部８Ａに入れて、各段の並列ケース３を、凹部溝に凸条を案内するように積層している。   In addition, the assembled battery of FIG. 6 has a specific parallel case 3, for example, a parallel case 3 stacked in an even number or an odd number, so that adjacent parallel cases 3 can be stacked by guiding the ridges into the concave grooves. A position adjustment protrusion 13 is provided. The assembled battery shown in the figure is provided with a position adjustment protrusion 13 in a parallel case 3 stacked in an even number of stages. In the illustrated parallel case 3, the position adjustment protrusion 13 is inserted into the fitting portion 8 </ b> A of the connecting plate 8, and the parallel case 3 at each stage is stacked so as to guide the protrusions into the recess grooves.

さらに、図８の並列ケース３は、隣接する電池１の間に配設されるスペーサーリブ１４を内面に突出して設けている。この並列ケース３は、スペーサーリブ１４を一体的に成形して設けているリブケース３Ｘと、箱形に成形している箱ケース３Ｙとからなる。リブケース３Ｘは、複数のスペーサーリブ１４を平行に設けている。スペーサーリブ１４の間は、円筒型電池１を嵌入できるＵ字溝１５を設けている。Ｕ字溝１５は両端を開口している。この並列ケース３は、Ｕ字溝１５に円筒型電池１を入れて定位置に保持して、電池１の両端にリード板５をスポット溶接等の方法で連結できる。したがって、リブケース３Ｘをリード板５を連結する治具に併用して、電池１を定位置に保持できる。また、スペーサーリブ１４で隣の電池１を隔離して並列ユニット６に収納するので、いずれかの電池１が熱暴走するときに、隣の電池１に熱暴走が誘発されるのを阻止して安全性を向上できる。この並列ケース３は、リブケース３ＸのＵ字溝１５に電池１を入れて電池１にリード板５を連結した後、電池１とリブケース３Ｘを一緒に箱ケース３Ｙに入れて、箱ケース３Ｙとリブケース３Ｘを連結する。箱ケース３Ｙは、リード板５を案内するスリット１６を設けている。   Further, the parallel case 3 of FIG. 8 is provided with spacer ribs 14 disposed between the adjacent batteries 1 so as to protrude from the inner surface. The parallel case 3 includes a rib case 3X in which spacer ribs 14 are integrally formed and a box case 3Y formed in a box shape. The rib case 3X is provided with a plurality of spacer ribs 14 in parallel. A U-shaped groove 15 into which the cylindrical battery 1 can be inserted is provided between the spacer ribs 14. The U-shaped groove 15 is open at both ends. The parallel case 3 can hold the cylindrical battery 1 in the U-shaped groove 15 and hold it in a fixed position, and connect the lead plates 5 to both ends of the battery 1 by a method such as spot welding. Therefore, the battery 1 can be held at a fixed position by using the rib case 3X together with a jig for connecting the lead plate 5. Further, since the adjacent battery 1 is isolated by the spacer rib 14 and accommodated in the parallel unit 6, when any one of the batteries 1 undergoes thermal runaway, the thermal runaway is prevented from being induced in the adjacent battery 1. Safety can be improved. In this parallel case 3, after the battery 1 is inserted into the U-shaped groove 15 of the rib case 3X and the lead plate 5 is connected to the battery 1, the battery 1 and the rib case 3X are put together in the box case 3Y, and the box case 3Y and the rib case 3 Connect 3X. The box case 3Y is provided with a slit 16 for guiding the lead plate 5.

並列ケース３に一段に収納される電池１は、両端の正負の電極にリード板５をスポット溶接等の方法で連結して互いに並列に接続される。図２ないし図６及び図８に示すリード板５は、金属板を所定の幅に切断したものである。このリード板５は、電池両端に連結され、さらに並列ケース３から突出する部分を接続部５Ａとしている。図９と図１０に示すリード板５は、電池１に連結される電池連結部５Ｂの幅を広く、接続部５Ａの幅を電池連結部５Ｂよりも狭くしている。電池連結部５Ｂの幅を広くするリード板５は、並列ケース３に収納する電池１をしっかりと強靭な状態で連結できる。また、幅の広い電池連結部５Ｂは電気抵抗が小さく、並列ケースに収納する電池１を電気抵抗な状態で並列に接続できる。   The batteries 1 housed in the parallel case 3 are connected in parallel by connecting the lead plates 5 to the positive and negative electrodes at both ends by a method such as spot welding. The lead plate 5 shown in FIGS. 2 to 6 and 8 is obtained by cutting a metal plate into a predetermined width. The lead plate 5 is connected to both ends of the battery, and a portion protruding from the parallel case 3 is a connecting portion 5A. The lead plate 5 shown in FIGS. 9 and 10 has a wider battery connecting portion 5B connected to the battery 1 and a smaller connecting portion 5A than the battery connecting portion 5B. The lead plate 5 that widens the width of the battery connecting portion 5B can connect the batteries 1 housed in the parallel case 3 in a firm and tough state. Further, the wide battery connecting portion 5B has a small electric resistance, and the batteries 1 housed in the parallel case can be connected in parallel in a state of electric resistance.

とくに、図９は、一方のリード板５を、金属板を溝形に折曲加工している溝形リード板５Ｘとしている。溝形リード板５Ｘは、電池１を溝内に入れて外装缶との間に隙間ができないように、あるいはほとんど隙間ができないように、溝の内幅を外装缶の外径にほぼ等しくなるコ字状としている。この溝形リード板５Ｘは、電池１を溝内に入れて、電池１の外装缶を保護する。また、この溝形リード板５Ｘは、溝底５ａを外装缶の底面にスポット溶接等の方法で連結する。また、溝形リード板５Ｘは、溝底５ａの両側に設けている側板４ｂを外装缶に電気接続して、並列ケース３に入れる電池１を低抵抗な状態で電気接続できる。溝形リード板５Ｘは、側板５ｂを外装缶にスポット溶接等の方法で連結して、側板５ｂと電池１とをより確実に連結できる。溝形リード板５Ｘを電池１の外装缶に接触させる構造、すなわち溝形リード板５Ｘと電池１の外装缶とを熱結合する構造は、溝形リード板５Ｘで電池１を効率よく冷却でき、さらに並列接続する電池１の温度差を少なくできる効果もある。溝形リード板５Ｘで一方の電極を連結し、他方の電極を幅広の電池連結部５Ｂと幅の狭い接続部５Ａからなるリード板５で連結してなる電池１は、並列ケース３に収納されて並列ユニット６となる。   In particular, in FIG. 9, one lead plate 5 is a groove-shaped lead plate 5X in which a metal plate is bent into a groove shape. The grooved lead plate 5X has a groove whose inner width is substantially equal to the outer diameter of the outer can so that the battery 1 is not inserted into the groove and no gap is formed between the battery 1 and the outer can. It is shaped like a letter. The grooved lead plate 5X protects the outer can of the battery 1 by placing the battery 1 in the groove. In addition, the groove-shaped lead plate 5X connects the groove bottom 5a to the bottom surface of the outer can by a method such as spot welding. Further, the groove-shaped lead plate 5X can electrically connect the battery 1 placed in the parallel case 3 with low resistance by electrically connecting the side plates 4b provided on both sides of the groove bottom 5a to the outer can. The groove-shaped lead plate 5X can more reliably connect the side plate 5b and the battery 1 by connecting the side plate 5b to the outer can by a method such as spot welding. The structure in which the grooved lead plate 5X is brought into contact with the outer can of the battery 1, that is, the structure in which the grooved lead plate 5X and the outer can of the battery 1 are thermally coupled can efficiently cool the battery 1 with the grooved lead plate 5X. Furthermore, there is an effect that the temperature difference between the batteries 1 connected in parallel can be reduced. A battery 1 formed by connecting one electrode with a grooved lead plate 5X and connecting the other electrode with a lead plate 5 including a wide battery connecting portion 5B and a narrow connecting portion 5A is housed in a parallel case 3. Thus, the parallel unit 6 is obtained.

図１０の並列ユニット６は、並列ケース３の内部に絶縁樹脂１７を充填している。絶縁樹脂１７はウレタン等の合成樹脂である。この並列ユニット６は、並列ケース３の内部に入れる電池１が絶縁樹脂１７にポッティングされて、定位置にしっかりと保持される。並列ケース３は、両端を開口する枠形としている。枠形の並列ケース３は、図において上下端を開口している。この並列ケース３に電池１を入れて、底の開口部でリード板５を連結する。リード板５は、電池１を並列に連結して、並列ケース３の底の開口部を閉塞する。この状態で、並列ケース３に未硬化でペースト状の絶縁樹脂１７を充填して、電池１を並列ケース３の内部にポッティングする。絶縁樹脂１７を硬化させて、電池１を定位置に固定した後、電池１の他端にリード板５を抵抗溶接やレーザー溶接等の方法で連結して、並列ユニット６とする。この並列ユニット６も、並列ケース３に収納する電池１を絶縁樹脂１７でポッティングするので、電池１をしっかりと定位置に固定しながら、電池１の温度を均一にできる特徴がある。ただ、絶縁樹脂を充填する並列ケースは、一端を開口する箱形とすることもできる。   The parallel unit 6 in FIG. 10 is filled with an insulating resin 17 inside the parallel case 3. The insulating resin 17 is a synthetic resin such as urethane. In the parallel unit 6, the battery 1 to be placed inside the parallel case 3 is potted by the insulating resin 17 and is securely held in place. The parallel case 3 has a frame shape that opens at both ends. The frame-shaped parallel case 3 has upper and lower ends opened in the figure. The battery 1 is put in the parallel case 3, and the lead plate 5 is connected to the opening at the bottom. The lead plate 5 connects the batteries 1 in parallel and closes the opening at the bottom of the parallel case 3. In this state, the parallel case 3 is filled with uncured and pasty insulating resin 17, and the battery 1 is potted inside the parallel case 3. After the insulating resin 17 is cured and the battery 1 is fixed in a fixed position, the lead plate 5 is connected to the other end of the battery 1 by a method such as resistance welding or laser welding to form the parallel unit 6. The parallel unit 6 is also characterized in that the battery 1 housed in the parallel case 3 is potted with the insulating resin 17, so that the temperature of the battery 1 can be made uniform while the battery 1 is firmly fixed in place. However, the parallel case filled with the insulating resin may be a box shape having one end opened.

図６の組電池は、基板ホルダー７と連結プレート８を介して、積層された並列ケース３の対向面を連結している。この組電池は、回路基板４を収納する基板ホルダー７と連結プレート８を備える。基板ホルダー７は、底板の周囲に周壁を設けた箱形にプラスチックを成形している。回路基板４は基板ホルダー７の内部に収納して定位置に固定される。好ましくは、基板ホルダー７に絶縁樹脂を充填して、回路基板４を基板ホルダー７の内部にポッティングする。この状態で基板ホルダー７に回路基板４を固定する構造は、回路基板４をポッティングして保護できる。   The assembled battery of FIG. 6 connects the opposing surfaces of the stacked parallel cases 3 via the substrate holder 7 and the connecting plate 8. This assembled battery includes a substrate holder 7 for housing the circuit board 4 and a connecting plate 8. The substrate holder 7 is made of plastic in a box shape having a peripheral wall around the bottom plate. The circuit board 4 is housed inside the board holder 7 and fixed in place. Preferably, the substrate holder 7 is filled with an insulating resin, and the circuit board 4 is potted inside the substrate holder 7. The structure in which the circuit board 4 is fixed to the board holder 7 in this state can be protected by potting the circuit board 4.

並列ユニット６は、基板ホルダー７に固定している回路基板４に、リード板５の接続部５Ａを連結して、基板ホルダー７と回路基板４に連結される。さらに、図の組電池は、並列ユニット６と基板ホルダー７を嵌着構造で定位置に連結している。図の基板ホルダー７は、並列ユニット６を嵌着構造で連結するために、並列ケース３の端部を嵌入する連結凹部７Ａを底面に、リード板５の接続部５Ａを嵌入する嵌入凹部７Ｂを側面にそれぞれ設けている。並列ケース３の端部を連結凹部７Ａに、リード板５の接続部５Ａを嵌入凹部７Ｂに入れる状態で、並列ユニット６は基板ホルダー７の定位置に装着されて、リード板５の接続部５Ａが回路基板４に半田付け等の方法で連結される。接続部５Ａが回路基板４に連結されると、回路基板４と並列ユニット６との間に配設される基板ホルダー７は、回路基板４と並列ユニット６に挟まれて定位置に配置される。回路基板４を基板ホルダー７にポッティングする組電池は、リード板５の接続部５Ａを回路基板４に連結した後、基板ホルダー７に絶縁樹脂を充填して、回路基板４を絶縁樹脂に埋設する。   The parallel unit 6 is connected to the circuit board 4 fixed to the circuit board holder 7 by connecting the connection portion 5 </ b> A of the lead plate 5 to the circuit board holder 7 and the circuit board 4. Furthermore, the assembled battery of the figure has connected the parallel unit 6 and the board | substrate holder 7 in the fixed position by the fitting structure. In order to connect the parallel units 6 with a fitting structure, the substrate holder 7 shown in the figure has a connecting concave portion 7A for fitting the end portion of the parallel case 3 on the bottom surface and a fitting concave portion 7B for fitting the connecting portion 5A of the lead plate 5. It is provided on each side. The parallel unit 6 is mounted at a fixed position of the substrate holder 7 with the end of the parallel case 3 being inserted into the connecting recess 7A and the connecting portion 5A of the lead plate 5 into the fitting recess 7B. Are connected to the circuit board 4 by a method such as soldering. When the connecting portion 5A is coupled to the circuit board 4, the board holder 7 disposed between the circuit board 4 and the parallel unit 6 is disposed between the circuit board 4 and the parallel unit 6 at a fixed position. . In the assembled battery in which the circuit board 4 is potted on the board holder 7, the connecting portion 5A of the lead plate 5 is connected to the circuit board 4, and then the board holder 7 is filled with an insulating resin, and the circuit board 4 is embedded in the insulating resin. .

さらに、図６の組電池は、並列ユニット６を連結プレート８に嵌着構造で連結している。この組電池は、並列ケース３の基板ホルダー連結側との反対側に連結プレート８を配設している。多段に積層して連結している複数の並列ケース３は、基板ホルダー７と連結プレート８の間に配設されて、基板ホルダー７と連結プレート８の両方に連結される。   Furthermore, the assembled battery of FIG. 6 has connected the parallel unit 6 to the connection plate 8 with the fitting structure. In this assembled battery, a connecting plate 8 is disposed on the side opposite to the board holder connecting side of the parallel case 3. The plurality of parallel cases 3 stacked and connected in multiple stages are disposed between the substrate holder 7 and the connection plate 8 and connected to both the substrate holder 7 and the connection plate 8.

連結プレート８は、並列ユニット６の一端部を嵌入できる嵌入部８Ａを設けている。図の連結プレート８は、嵌入部８Ａを貫通孔としている。ただ、嵌入部は凹部として、ここに並列ユニットの端部を入れて、定位置に連結することもできる。この構造は、隣接する並列ユニット６を回路基板４と連結プレート８でしっかりと連結できる。   The connecting plate 8 is provided with a fitting portion 8A into which one end portion of the parallel unit 6 can be fitted. The connecting plate 8 in the figure has a fitting portion 8A as a through hole. However, the insertion portion can be a recess, and the end of the parallel unit can be inserted here and connected to a fixed position. With this structure, adjacent parallel units 6 can be firmly connected to the circuit board 4 and the connection plate 8.

以上の組電池は、各々の並列ユニット６の接続部５Ａを直接に回路基板４に接続している。この組電池は、回路基板４に実装され、あるいは回路基板４の上に配線される接続リード（図示せず）でもって、各々の並列ユニット６を直列に、あるいは直列と並列に接続する。本発明の組電池は、各々の並列ユニット６の接続部５Ａを必ずしも直接に回路基板４に接続する必要はない。図１１ないし図１７に示す組電池は、並列ユニット６の接続部５Ａを隣の並列ユニット６の接続部５Ａに溶接等の方法で連結している。これらの組電池は、並列ユニット６の接続部５Ａを、隣の並列ユニット６の接続部５Ａを介して回路基板４に連結する。これらの組電池は、回路基板４に設けた接続リードで並列ユニット６を直列に接続する必要がなく、接続部５Ａを直接に隣の並列ユニット６のリード板５に接続して、接続部５Ａの電気抵抗を小さくできる。なお、図１２ないし図１７に示す組電池は回路基板を図示していない。ただ、これらの組電池も、基板ホルダー７に回路基板が収納されると共に、この回路基板に接続リード等を介して並列ユニット６の接続部５Ａが接続される。   In the above assembled battery, the connection portion 5A of each parallel unit 6 is directly connected to the circuit board 4. The assembled battery is connected to the parallel units 6 in series or in series and parallel with connection leads (not shown) mounted on the circuit board 4 or wired on the circuit board 4. In the assembled battery of the present invention, it is not always necessary to directly connect the connection portion 5A of each parallel unit 6 to the circuit board 4. In the assembled battery shown in FIG. 11 to FIG. 17, the connecting portion 5A of the parallel unit 6 is connected to the connecting portion 5A of the adjacent parallel unit 6 by a method such as welding. These assembled batteries connect the connection part 5A of the parallel unit 6 to the circuit board 4 via the connection part 5A of the adjacent parallel unit 6. These assembled batteries do not need to connect the parallel units 6 in series with the connection leads provided on the circuit board 4, and connect the connecting portion 5A directly to the lead plate 5 of the adjacent parallel unit 6 to connect the connecting portion 5A. The electrical resistance can be reduced. The assembled battery shown in FIGS. 12 to 17 does not show a circuit board. However, in these assembled batteries, the circuit board is housed in the substrate holder 7, and the connection portion 5A of the parallel unit 6 is connected to the circuit substrate via a connection lead or the like.

図１２ないし図１７に示す組電池は、複数の並列ユニット６を段方向に積層しており、複数の並列ケース３を互いに積層してホルダーケース２としている。これらの組電池は、多段に積層される並列ケース３を定位置に配設して連結するために、複数の並列ケース３を基板ホルダー７と連結プレート８の間に配設して、並列ケース３の両端を基板ホルダー７と連結プレート８とに嵌着構造で連結している。並列ケース３を嵌着構造で基板ホルダー７と連結プレート８に連結するために、図に示す並列ケース３は、基板ホルダー７と連結プレート８に対向する両端面に位置決め凸部１８を突出して設けている。基板ホルダー７は、並列ケース３の位置決め凸部１８を嵌入する連結凹部７Ａを設けている。また、連結プレート８は、並列ケース３の位置決め凸部１８を嵌入する嵌入部８Ａを設けている。複数の並列ケース３は、段方向に積層される状態で、両端の位置決め凸部１８を基板ホルダー７の連結凹部７Ａと連結プレート８の嵌入部８Ａに嵌入して定位置に連結される。   In the assembled battery shown in FIGS. 12 to 17, a plurality of parallel units 6 are stacked in a step direction, and a plurality of parallel cases 3 are stacked together to form a holder case 2. These battery packs are provided with a plurality of parallel cases 3 disposed between the substrate holder 7 and the connecting plate 8 in order to connect and connect the parallel cases 3 stacked in multiple stages at a fixed position. 3 are connected to the substrate holder 7 and the connecting plate 8 by a fitting structure. In order to connect the parallel case 3 to the substrate holder 7 and the connecting plate 8 with a fitting structure, the parallel case 3 shown in the figure is provided with positioning protrusions 18 protruding from both end faces facing the substrate holder 7 and the connecting plate 8. ing. The substrate holder 7 is provided with a connecting concave portion 7A into which the positioning convex portion 18 of the parallel case 3 is fitted. Further, the connecting plate 8 is provided with a fitting portion 8A into which the positioning convex portion 18 of the parallel case 3 is fitted. In a state where the plurality of parallel cases 3 are stacked in the step direction, the positioning projections 18 at both ends are fitted into the coupling recesses 7A of the substrate holder 7 and the fitting portions 8A of the coupling plate 8 and are connected to a fixed position.

さらに、図に示す組電池は、多段に積層される複数の並列ケース３から引き出される接続部５Ａであって、互いに隣接する並列ユニット６の接続部５Ａを交互に連結して、複数の並列ユニット６の電池１を直列に接続している。互いに連結される接続部５Ａは、基板ホルダー７に収納される回路基板（図示せず）に接続される。図の基板ホルダー７は、リード板５の接続部５Ａを嵌入する嵌入凹部７Ｂを側面にそれぞれ設けている。複数の並列ユニット６は、並列ケース３の位置決め凸部１８を連結凹部７Ａに、リード板５の接続部５Ａを嵌入凹部７Ｂに入れる状態で、基板ホルダー７の定位置に装着されて、リード板５の接続部５Ａが回路基板に半田付け等の方法で連結される。   Furthermore, the assembled battery shown in the figure is a connection portion 5A drawn out from a plurality of parallel cases 3 stacked in multiple stages, and alternately connects the connection portions 5A of the parallel units 6 adjacent to each other, thereby providing a plurality of parallel units. 6 batteries 1 are connected in series. The connecting portions 5A connected to each other are connected to a circuit board (not shown) accommodated in the board holder 7. The substrate holder 7 shown in the figure is provided with insertion recesses 7B into which the connection portions 5A of the lead plate 5 are inserted, respectively. The plurality of parallel units 6 are mounted at fixed positions on the substrate holder 7 with the positioning protrusions 18 of the parallel case 3 inserted into the connecting recesses 7A and the connection portions 5A of the lead plates 5 inserted into the insertion recesses 7B. The five connecting portions 5A are connected to the circuit board by a method such as soldering.

図１２ないし図１４に示す組電池は、複数の並列ケース３を、外側を平面とする箱形に成形している。この並列ケース３は、隣接する電池１の間に配設されるスペーサーリブ１４を一体的に成形して設けているリブケース３Ｘと、箱形に成形している箱ケース３Ｙとからなる。この並列ケース３は、互いに平行に設けている複数のスペーサーリブ１４の間に、円筒型電池を嵌入できるＵ字溝１５を設けている。この並列ケース３は、Ｕ字溝１５に電池１を入れて電池１にリード板５を連結した後、電池１とリブケース３Ｘを一緒に箱ケース３Ｙに入れて、箱ケース３Ｙとリブケース３Ｘを連結する。リブケース３Ｘは、一端に位置決め凸部１８を一体的に成形して設けている。箱ケース３Ｙは、リブケース３Ｘに設けた位置決め凸部１８と反対側の一端に、位置決め凸部１８を一体的に成形して設けている。ただ、位置決め凸部は、リブケースの両端に設けることもできる。   In the assembled battery shown in FIGS. 12 to 14, a plurality of parallel cases 3 are formed in a box shape having a flat outer surface. The parallel case 3 includes a rib case 3X in which spacer ribs 14 disposed between adjacent batteries 1 are integrally formed, and a box case 3Y formed in a box shape. This parallel case 3 is provided with a U-shaped groove 15 into which a cylindrical battery can be inserted between a plurality of spacer ribs 14 provided in parallel to each other. In this parallel case 3, after the battery 1 is inserted into the U-shaped groove 15 and the lead plate 5 is connected to the battery 1, the battery 1 and the rib case 3X are put together in the box case 3Y, and the box case 3Y and the rib case 3X are connected. To do. The rib case 3X is provided with a positioning projection 18 integrally formed at one end. The box case 3Y is formed by integrally molding the positioning convex portion 18 at one end opposite to the positioning convex portion 18 provided in the rib case 3X. However, the positioning protrusions can be provided at both ends of the rib case.

図１５ないし図１７の組電池は、複数の並列ケース３を、外側を凹凸面とする形状に成形している。図の並列ケース３は、両側に配置する一対の側面プレート３ａを、収納する円筒型電池の外面に沿う凹凸面としている。この並列ケース３は、隣接する電池１の間に配設される隔壁１９を備えており、この隔壁１９の両端を一対の側面プレート３ａに連結している。すなわち、図の並列ケース３は、一対の側面プレート３ａを複数の隔壁１９で連結する形状として、内部に電池１を収納する筒部を有する形状に一体成形している。この筒部は、円筒型電池を挿入できるように、内径を円筒型電池の外径にほぼ等しい円筒状としている。この組電池は、外側を凹凸面とする並列ケース３を積層してホルダーケース２とするが、図６に示す組電池のように、隣接する並列ケース３の側面プレート３ａの凹部溝に凸条を案内する状態、すなわち俵積み状態では配列しない。この組電池は、互いに隣接する並列ケース３の側面プレート３ａの凸条同士が対向する配列で積層している。この構造で並列ユニット６を多段に積層する構造は、いずれかの並列ユニットの電池が熱暴走するときに、隣接して配設される並列ユニット６の電池１に熱暴走が誘発されるのを有効に阻止して安全性を向上できる特長がある。また、この組電池は、隣接する並列ケース３の互いに対向する側面プレート３ａの凹部溝によって隙間が形成されるので、この隙間に送風して電池を効率よく放熱することもできる。   In the assembled battery of FIGS. 15 to 17, a plurality of parallel cases 3 are formed in a shape having an uneven surface on the outside. In the parallel case 3 shown in the figure, the pair of side plates 3a disposed on both sides is formed as an uneven surface along the outer surface of the cylindrical battery to be housed. The parallel case 3 includes a partition wall 19 disposed between adjacent batteries 1, and both ends of the partition wall 19 are connected to a pair of side plates 3a. That is, the parallel case 3 shown in the figure is integrally formed into a shape having a cylindrical portion that houses the battery 1 therein, as a shape in which a pair of side plates 3a are connected by a plurality of partition walls 19. The cylindrical portion has a cylindrical shape whose inner diameter is substantially equal to the outer diameter of the cylindrical battery so that the cylindrical battery can be inserted. In this assembled battery, a parallel case 3 having an uneven surface on the outside is laminated to form a holder case 2. However, as in the assembled battery shown in FIG. 6, a protruding line is formed in the concave groove of the side plate 3 a of the adjacent parallel case 3. They are not arranged in the state of guiding them, that is, in the stacked state. In this assembled battery, the protrusions of the side plates 3a of the parallel cases 3 adjacent to each other are stacked in an array in which the ridges face each other. The structure in which the parallel units 6 are stacked in multiple stages in this structure is such that when one of the parallel unit batteries is thermally runaway, the thermal runaway is induced in the battery 1 of the parallel unit 6 disposed adjacent thereto. It has the feature that it can effectively prevent and improve safety. Further, in this assembled battery, a gap is formed by the recessed grooves of the side plates 3a facing each other in the adjacent parallel case 3, so that the battery can be efficiently radiated by blowing air into the gap.

本出願人が先に開発した組電池の断面図である。It is sectional drawing of the assembled battery which the present applicant developed previously. 本発明の一実施例にかかる組電池の斜視図である。It is a perspective view of the assembled battery concerning one Example of this invention. 図２に示す組電池の並列ユニットの分解斜視図である。It is a disassembled perspective view of the parallel unit of the assembled battery shown in FIG. 図３に示す並列ユニットの分解斜視図である。It is a disassembled perspective view of the parallel unit shown in FIG. 本発明の他の実施例にかかる組電池の断面図である。It is sectional drawing of the assembled battery concerning the other Example of this invention. 本発明の他の実施例にかかる組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery concerning the other Example of this invention. 並列ケースの連結構造の一例を示す拡大側面図である。It is an enlarged side view which shows an example of the connection structure of a parallel case. 並列ユニットの他の一例を示す分解斜視図である。It is a disassembled perspective view which shows another example of a parallel unit. 並列ユニットの他の一例を示す分解斜視図である。It is a disassembled perspective view which shows another example of a parallel unit. 並列ユニットの他の一例を示す分解斜視図である。It is a disassembled perspective view which shows another example of a parallel unit. 本発明の他の実施例にかかる組電池の斜視図である。It is a perspective view of the assembled battery concerning the other Example of this invention. 本発明の他の実施例にかかる組電池の斜視図である。It is a perspective view of the assembled battery concerning the other Example of this invention. 図１２に示す組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery shown in FIG. 図１２に示す組電池の断面図である。It is sectional drawing of the assembled battery shown in FIG. 本発明の他の実施例にかかる組電池の斜視図である。It is a perspective view of the assembled battery concerning the other Example of this invention. 図１５に示す組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery shown in FIG. 図１５に示す組電池の断面図である。It is sectional drawing of the assembled battery shown in FIG.

符号の説明Explanation of symbols

１…電池
２…ホルダーケース
３…並列ケース ３Ａ…本体部
３Ｂ…蓋材
３ａ…側面プレート
３Ｘ…リブケース
３Ｙ…箱ケース
４…回路基板
５…リード板 ５Ａ…接続部
５Ｂ…電池連結部
５Ｘ…溝形リード板
５ａ…溝底
５ｂ…側板
６…並列ユニット
７…基板ホルダー ７Ａ…連結凹部
７Ｂ…嵌入凹部
８…連結プレート ８Ａ…嵌入部
９…外装ケース
１０…コアパック
１１…凸条
１２…連結部 １２Ａ…凹部
１２Ｂ…凸部
１３…位置調整突出部
１４…スペーサーリブ
１５…Ｕ字溝
１６…スリット
１７…絶縁樹脂
１８…位置決め凸部
１９…隔壁
９１…電池
９２…外ケース
９３…電池ブロック
９４…回路基板
９５…リード板
９６…並列ユニット
９７…スペーサー DESCRIPTION OF SYMBOLS 1 ... Battery 2 ... Holder case 3 ... Parallel case 3A ... Main-body part
3B ... Cover material
3a ... Side plate
3X ... Rib case
3Y ... Box case 4 ... Circuit board 5 ... Lead plate 5A ... Connection part
5B ... Battery connection part
5X ... Channel type lead plate
5a ... groove bottom
5b ... Side plate 6 ... Parallel unit 7 ... Substrate holder 7A ... Connection recess
7B: Insertion recessed part 8 ... Connection plate 8A ... Insertion part 9 ... Outer case 10 ... Core pack 11 ... Convex strip 12 ... Connection part 12A ... Concave part
12B ... Convex part 13 ... Position adjustment protrusion part 14 ... Spacer rib 15 ... U-shaped groove 16 ... Slit 17 ... Insulating resin 18 ... Positioning convex part 19 ... Partition wall 91 ... Battery 92 ... Outer case 93 ... Battery block 94 ... Circuit board 95 ... Lead plate 96 ... Parallel unit 97 ... Spacer

Claims (8)

複数本の電池(1)を互いに平行な姿勢で、複数段で複数列に収納しているホルダーケース(2)と、このホルダーケース(2)に収納される電池(1)に電気接続している回路基板(4)とを備える組電池であって、
ホルダーケース(2)が、内蔵する複数本の電池(1)を並列に接続してなる複数の並列ケース(3)に分割されると共に、複数に分割された並列ケース(3)を段方向に積層して互いに連結しており、
さらに、各々の並列ケース(3)には、複数本の電池(1)を、正負の電極の向きを同方向として一段に並べて収納して並列ユニット(6)としており、並列ユニット(6)は、並列ケース(3)に収納している各々の電池(1)の電極にリード板(5)を連結して、リード板(5)でもって並列ケース(3)に収納する複数本の電池(1)を互いに並列に接続しており、さらに並列ユニット(6)は、並列ケース(3)からリード板(5)を突出させて接続部(5A)を設けており、
隣接する並列ユニット(6)が、リード板(5)の接続部(5A)を回路基板(4)の対向面に配設して積層され、さらに、積層される各々の並列ユニット(6)は、リード板(5)の接続部(5A)を、直接又は隣の並列ユニット(6)の接続部(5A)を介して回路基板(4)に連結して、リード板(5)と回路基板(4)を介して並列ユニット(6)を一体的に連結してなり、
回路基板(4)を収納する基板ホルダー(7)を備え、この基板ホルダー(7)と並列ユニット(6)を嵌着構造で定位置に連結している組電池。 A plurality of batteries (1) are electrically connected to the holder case (2), which is stored in multiple rows in multiple rows, and the battery (1), which is stored in the holder case (2), in a parallel posture. An assembled battery comprising a circuit board (4),
The holder case (2) is divided into a plurality of parallel cases (3) formed by connecting a plurality of built-in batteries (1) in parallel, and the divided parallel cases (3) are arranged in the step direction. Stacked and connected to each other,
Furthermore, in each parallel case (3), a plurality of batteries (1) are arranged in a single row with the positive and negative electrodes oriented in the same direction to form parallel units (6). The lead plate (5) is connected to the electrode of each battery (1) stored in the parallel case (3), and a plurality of batteries stored in the parallel case (3) with the lead plate (5) ( 1) are connected in parallel to each other, and the parallel unit (6) is further provided with a connecting portion (5A) by protruding the lead plate (5) from the parallel case (3),
Adjacent parallel units (6) are stacked with the connecting portion (5A) of the lead plate (5) disposed on the facing surface of the circuit board (4), and each stacked parallel unit (6) is The connection part (5A) of the lead plate (5) is connected to the circuit board (4) directly or via the connection part (5A) of the adjacent parallel unit (6), and the lead board (5) and the circuit board are connected. (4) Ri greens and integrally connected to parallel unit (6) via,
An assembled battery comprising a substrate holder (7) for storing a circuit board (4), and connecting the substrate holder (7) and the parallel unit (6) in place with a fitting structure . 並列ケース(3)の基板ホルダー連結側との反対側に連結プレート(8)を配設し、多段に積層して連結している複数の並列ケース(3)を、基板ホルダー(7)と連結プレート(8)の間に配設して、並列ケース(3)を基板ホルダー(7)と連結プレート(8)の両方に連結している請求項１に記載される組電池。 A connection plate (8) is arranged on the opposite side of the parallel case (3) to the substrate holder connection side, and multiple parallel cases (3) stacked and connected in multiple stages are connected to the substrate holder (7). The assembled battery according to claim 1 , wherein the battery pack is disposed between the plates (8) to connect the parallel case (3) to both the substrate holder (7) and the connecting plate (8). 複数本の電池(1)を互いに平行な姿勢で、複数段で複数列に収納しているホルダーケース(2)と、このホルダーケース(2)に収納される電池(1)に電気接続している回路基板(4)とを備える組電池であって、
ホルダーケース(2)が、内蔵する複数本の電池(1)を並列に接続してなる複数の並列ケース(3)に分割されると共に、複数に分割された並列ケース(3)を段方向に積層して互いに連結しており、
さらに、各々の並列ケース(3)には、複数本の電池(1)を、正負の電極の向きを同方向として一段に並べて収納して並列ユニット(6)としており、並列ユニット(6)は、並列ケース(3)に収納している各々の電池(1)の電極にリード板(5)を連結して、リード板(5)でもって並列ケース(3)に収納する複数本の電池(1)を互いに並列に接続しており、さらに並列ユニット(6)は、並列ケース(3)からリード板(5)を突出させて接続部(5A)を設けており、
隣接する並列ユニット(6)が、リード板(5)の接続部(5A)を回路基板(4)の対向面に配設して積層され、さらに、積層される各々の並列ユニット(6)は、リード板(5)の接続部(5A)を、直接又は隣の並列ユニット(6)の接続部(5A)を介して回路基板(4)に連結して、リード板(5)と回路基板(4)を介して並列ユニット(6)を一体的に連結してなり、
並列ケース(3)に収納する電池(1)が円筒型電池で、並列ケース(3)は収納する円筒型電池の外面に沿う凹凸面に側面プレート(3a)を成形しており、隣接して配設される並列ケース(3)が、互いに側面プレート(3a)の凹部に凸部が位置するように積層してなる組電池。 A plurality of batteries (1) are electrically connected to the holder case (2), which is stored in multiple rows in multiple rows, and the battery (1), which is stored in the holder case (2), in a parallel posture. An assembled battery comprising a circuit board (4),
The holder case (2) is divided into a plurality of parallel cases (3) formed by connecting a plurality of built-in batteries (1) in parallel, and the divided parallel cases (3) are arranged in the step direction. Stacked and connected to each other,
Furthermore, in each parallel case (3), a plurality of batteries (1) are arranged in a single row with the positive and negative electrodes oriented in the same direction to form parallel units (6). The lead plate (5) is connected to the electrode of each battery (1) stored in the parallel case (3), and a plurality of batteries stored in the parallel case (3) with the lead plate (5) ( 1) are connected in parallel to each other, and the parallel unit (6) is further provided with a connecting portion (5A) by protruding the lead plate (5) from the parallel case (3),
Adjacent parallel units (6) are stacked with the connecting portion (5A) of the lead plate (5) disposed on the facing surface of the circuit board (4), and each stacked parallel unit (6) is The connection part (5A) of the lead plate (5) is connected to the circuit board (4) directly or via the connection part (5A) of the adjacent parallel unit (6), and the lead board (5) and the circuit board are connected. (4) Ri greens and integrally connected to parallel unit (6) via,
The battery (1) stored in the parallel case (3) is a cylindrical battery, and the parallel case (3) has a side plate (3a) formed on the uneven surface along the outer surface of the cylindrical battery to be stored. An assembled battery in which the arranged parallel cases (3) are laminated so that the convex portions are positioned in the concave portions of the side surface plate (3a). 複数本の電池(1)を互いに平行な姿勢で、複数段で複数列に収納しているホルダーケース(2)と、このホルダーケース(2)に収納される電池(1)に電気接続している回路基板(4)とを備える組電池であって、
ホルダーケース(2)が、内蔵する複数本の電池(1)を並列に接続してなる複数の並列ケース(3)に分割されると共に、複数に分割された並列ケース(3)を段方向に積層して互いに連結しており、
さらに、各々の並列ケース(3)には、複数本の電池(1)を、正負の電極の向きを同方向として一段に並べて収納して並列ユニット(6)としており、並列ユニット(6)は、並列ケース(3)に収納している各々の電池(1)の電極にリード板(5)を連結して、リード板(5)でもって並列ケース(3)に収納する複数本の電池(1)を互いに並列に接続しており、さらに並列ユニット(6)は、並列ケース(3)からリード板(5)を突出させて接続部(5A)を設けており、
隣接する並列ユニット(6)が、リード板(5)の接続部(5A)を回路基板(4)の対向面に配設して積層され、さらに、積層される各々の並列ユニット(6)は、リード板(5)の接続部(5A)を、直接又は隣の並列ユニット(6)の接続部(5A)を介して回路基板(4)に連結して、リード板(5)と回路基板(4)を介して並列ユニット(6)を一体的に連結してなり、
リード板(5)が金属板を溝形に折曲加工して、電池(1)の外装缶を溝内に入れて、外装缶に接続される電極をリード板(5)に接続している組電池。 A plurality of batteries (1) are electrically connected to the holder case (2), which is stored in multiple rows in multiple rows, and the battery (1), which is stored in the holder case (2), in a parallel posture. An assembled battery comprising a circuit board (4),
The holder case (2) is divided into a plurality of parallel cases (3) formed by connecting a plurality of built-in batteries (1) in parallel, and the divided parallel cases (3) are arranged in the step direction. Stacked and connected to each other,
Furthermore, in each parallel case (3), a plurality of batteries (1) are arranged in a single row with the positive and negative electrodes oriented in the same direction to form parallel units (6). The lead plate (5) is connected to the electrode of each battery (1) stored in the parallel case (3), and a plurality of batteries stored in the parallel case (3) with the lead plate (5) ( 1) are connected in parallel to each other, and the parallel unit (6) is further provided with a connecting portion (5A) by protruding the lead plate (5) from the parallel case (3),
Adjacent parallel units (6) are stacked with the connecting portion (5A) of the lead plate (5) disposed on the facing surface of the circuit board (4), and each stacked parallel unit (6) is The connection part (5A) of the lead plate (5) is connected to the circuit board (4) directly or via the connection part (5A) of the adjacent parallel unit (6), and the lead board (5) and the circuit board are connected. (4) Ri greens and integrally connected to parallel unit (6) via,
The lead plate (5) bends the metal plate into a groove shape, puts the outer can of the battery (1) into the groove, and connects the electrode connected to the outer can to the lead plate (5) Assembled battery. 隣接する並列ケース(3)を、互いに嵌着構造で定位置に連結して積層している請求項１から４に記載される組電池。 The assembled battery according to any one of claims 1 to 4 , wherein adjacent parallel cases (3) are connected to each other in a fixed position in a fitting structure and stacked. 隣接する並列ケース(3)を両面接着テープで接着して積層している請求項１から４に記載される組電池。 The assembled battery according to any one of claims 1 to 4 , wherein adjacent parallel cases (3) are bonded and laminated with a double-sided adhesive tape. 並列ケース(3)が、収納する電池(1)の間に配設しているスペーサーリブ(14)を内面に突出して設けている請求項１から６に記載される組電池。 The assembled battery according to any one of claims 1 to 6 , wherein the parallel case (3) is provided with spacer ribs (14) disposed between the batteries (1) to be housed so as to protrude from the inner surface. 並列ケース(3)の内部に絶縁樹脂(17)を充填して、電池(1)を並列ケース(3)の内部にポッティングしている請求項１から７に記載される組電池。
The assembled battery according to any one of claims 1 to 7 , wherein the parallel case (3) is filled with an insulating resin (17), and the battery (1) is potted inside the parallel case (3).
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