JP2014049227A

JP2014049227A - Battery pack

Info

Publication number: JP2014049227A
Application number: JP2012189663A
Authority: JP
Inventors: Haruhiko Yoneda; 晴彦米田; Masaya Nakano; 雅也中野; Osamu Inaoka; 修稲岡
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2012-08-30
Filing date: 2012-08-30
Publication date: 2014-03-17
Anticipated expiration: 2032-08-30
Also published as: JP6102125B2

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack which can be manufactured with excellent manufacturing efficiency, by having a battery holder composed of an integral member and capable of holding unit cells properly.SOLUTION: A battery holder 5 is configured to include a plurality of peripheral surface covering portions 57A-57F, 58A-58F, 59A-59F, 60A-60F, 61A-61F for covering a part of the peripheral surfaces 22A-22F of unit cells 20A-20F housed in housing spaces 1S-6S alternately from the single side along the Z axis or the opposite side thereof along the X direction, positive electrode terminals 23A-23F of the unit cells 20A-20F, and a pair of end covering parts (eaves 55A-55F, claws 56A-56F) covering negative electrode terminals 21A-21F.

Description

本発明は電池パックに関し、特に外装体に電池ホルダを収納する電池パックに関する。 The present invention relates to a battery pack, and more particularly to a battery pack that houses a battery holder in an exterior body.

近年、リチウムイオン電池等の二次電池を用いた電池パックが各種電子機器や電動工具、電動アシスト自転車等の電源として用いられている（特許文献１を参照）。代表的な電池パックは、外装ケースの内部にコアパック（発電要素）を収納して構成される（特許文献２を参照）。
従来の電池パック１におけるコアパック２´の構成例を図１６の組図に示す。コアパック２´は、複数の素電池２０Ａ´〜２０Ｈ´と、一対のホルダ部材５Ａ、５Ｂと、リード部材３ａ´〜３ｅ´と、ビスＢ１、Ｂ２とを有する。各ホルダ部材５Ａ、５Ｂは樹脂材料を用いてなる射出成形品であり、それぞれ各素電池２０Ａ´〜２０Ｈ´の周面形状に合わせた複数の筒状部５０Ａ´、５０Ｂ´を有する。 In recent years, battery packs using secondary batteries such as lithium ion batteries have been used as power sources for various electronic devices, electric tools, electric assist bicycles, and the like (see Patent Document 1). A typical battery pack is configured by housing a core pack (power generation element) inside an exterior case (see Patent Document 2).
A configuration example of the core pack 2 ′ in the conventional battery pack 1 is shown in the assembly diagram of FIG. 16. The core pack 2 ′ includes a plurality of unit cells 20A ′ to 20H ′, a pair of holder members 5A and 5B, lead members 3a ′ to 3e ′, and screws B1 and B2. Each holder member 5A, 5B is an injection-molded product using a resin material, and has a plurality of cylindrical portions 50A ', 50B' matched to the peripheral shape of each unit cell 20A'-20H '.

コアパック２´において、各素電池２０Ａ´〜２０Ｈ´はＸ方向を長手方向とし、ＹＺ方向に並設された状態で、一対のホルダ部材５Ａ、５Ｂの各筒状部５０Ａ´、５０Ｂ´で挟設される（図中の矢印方向を参照）。ホルダ部材５Ａ、５Ｂは互いにビスＢ１、Ｂ２で固定される。これにより各素電池２０Ａ´〜２０Ｈ´はホルダ部材５Ａ、５Ｂに保持される。各素電池２０Ａ´〜２０Ｈ´の長手方向両端の電極端子には、リード部材３ａ´〜３ｅ´がスポット溶接等により電気接続される。 In the core pack 2 ′, the unit cells 20 A ′ to 20 H ′ are arranged in parallel in the YZ direction with the X direction being the longitudinal direction, and the cylindrical portions 50 A ′ and 50 B ′ of the pair of holder members 5 A and 5 B ′. It is sandwiched (see the arrow direction in the figure). The holder members 5A and 5B are fixed to each other with screws B1 and B2. Thereby, each unit cell 20A'-20H 'is hold | maintained at holder member 5A, 5B. Lead members 3a ′ to 3e ′ are electrically connected to electrode terminals at both ends in the longitudinal direction of the respective unit cells 20A ′ to 20H ′ by spot welding or the like.

特開２０１１−１４６１５１号公報JP 2011-146151 A 特開２００６−１９６２７７号公報JP 2006-196277 A

近年、電池パックの製造効率の向上が求められている。しかしながら従来の電池ホルダは、図１６に示したように複数のホルダ部材を用い、各ホルダ部材同士をビスによる螺合構造や係合部による嵌合構造を用いて組み合わせて製造される場合がある。これにより電池ホルダの部品点数や工程数が増加し、電池パックの製造効率が低下するおそれがある。
本発明は上記課題に鑑みてなされたものであって、一体部材で構成され、適切に素電池を保持できる電池ホルダを有し、良好な製造効率で製造することが可能な電池パックを提供することを目的とする。 In recent years, improvement in battery pack manufacturing efficiency has been demanded. However, the conventional battery holder may be manufactured by using a plurality of holder members as shown in FIG. 16 and combining the holder members with each other using a screwing structure with screws or a fitting structure with engagement portions. . As a result, the number of parts and the number of processes of the battery holder increase, which may reduce the manufacturing efficiency of the battery pack.
The present invention has been made in view of the above problems, and provides a battery pack that is formed of an integral member, has a battery holder that can appropriately hold a unit cell, and can be manufactured with good manufacturing efficiency. For the purpose.

上記課題を解決するため、本発明の電池パックは、長尺状の素電池と、前記素電池を収納する収納空間を有してなる電池ホルダとを備え、前記電池ホルダは、前記収納空間に収納された前記素電池の複数の表面領域を、前記素電池の長手方向に沿って前記素電池の短手方向を通る互いに異なる方向より交互に被覆する複数の表面被覆部と、前記素電池の長手方向の両端部を被覆する一対の端部被覆部とを有するように一体部材で構成されてなる。 In order to solve the above problems, a battery pack according to the present invention includes a long unit cell and a battery holder having a storage space for storing the unit cell, and the battery holder is provided in the storage space. A plurality of surface covering portions that alternately cover a plurality of surface regions of the stored unit cells along different longitudinal directions of the unit cells along a short direction of the unit cells; It is comprised by the integral member so that it may have a pair of edge part coating | coated part which coat | covers the both ends of a longitudinal direction.

ここで前記電池ホルダは、並列に配された複数の前記収納空間を有し、複数の前記素電池が前記各収納空間に収納されている構成とすることもできる。
また、前記電池ホルダを前記長手方向の一端部より平面視する際、前記各表面被覆部は互いに前記収納空間を取り囲むように環状に配されている構成とすることもできる。
また、前記素電池は円筒型であり、前記短手方向は前記素電池の径方向であって、前記周面被覆部は半円筒形状である構成とすることもできる。 Here, the battery holder may have a plurality of storage spaces arranged in parallel, and the plurality of unit cells may be stored in the storage spaces.
Moreover, when the said battery holder is planarly viewed from the one end part of the said longitudinal direction, each said surface coating | coated part can also be set as the structure arrange | positioned cyclically | annularly so that the said storage space may mutually be surrounded.
The unit cell may be cylindrical, the short side direction may be the radial direction of the unit cell, and the peripheral surface covering portion may be a semi-cylindrical shape.

また、前記一対の端部被覆部のうち少なくとも一方は、可撓性を有するツメ部である構成とすることもできる。
また、前記素電池及び前記電池ホルダとを被覆する外装ケースを有し、前記ツメ部は、前記外装ケースの内面と前記素電池の両方に当接している構成とすることもできる。
また、前記素電池に電気接続された回路基板を有し、前記電池ホルダは、前記回路基板の固定部を有する構成とすることもできる。 Moreover, at least one can also be set as the structure which is a claw part which has flexibility among a pair of said edge part coating | coated parts.
Moreover, it has an exterior case which coat | covers the said unit cell and the said battery holder, The said claw part can also be set as the structure contact | abutted to both the inner surface of the said exterior case, and the said unit cell.
In addition, a circuit board electrically connected to the unit cell may be provided, and the battery holder may include a fixing portion of the circuit board.

さらに、前記電池ホルダは樹脂材料からなる射出成形品である構成とすることもできる。
また、前記異なる方向は、互いに相対する方向とすることもできる。
また、本発明のホルダ製造方法は、第１金型と第２金型とを接触させて配置する配置ステップと、接触させた前記第１金型及び前記第２金型間に形成される射出空間に溶融樹脂を射出して電池ホルダを成形する射出成形ステップとを有し、前記第１金型及び前記第２金型は、一方が一の方向を長手とする溝部、他方が前記溝部と前記射出空間をおいて嵌合可能な凸部を、前記一の方向に沿って交互にそれぞれ複数有し、前記成形ステップでは、前記各溝部及び前記各凸部の間に存在する前記射出空間を用いて、前記一の方向から平面視した際に環状の樹脂部材で取り囲まれた収納空間を有する電池ホルダを一体的に成形する。 Furthermore, the battery holder may be an injection molded product made of a resin material.
Further, the different directions may be directions opposite to each other.
Moreover, the holder manufacturing method of this invention WHEREIN: The arrangement | positioning step which arrange | positions a 1st metal mold | die and a 2nd metal mold | die, and the injection formed between the said 1st metal mold | die and the said 2nd metal mold | die contacted. An injection molding step of molding a battery holder by injecting a molten resin into the space, wherein the first mold and the second mold have a groove portion whose one direction is a longitudinal direction and the other is the groove portion. A plurality of convex portions that can be fitted in the injection space are alternately provided along the one direction, and in the molding step, the injection space existing between the groove portions and the convex portions is provided. The battery holder having a storage space surrounded by an annular resin member when viewed in plan from the one direction is integrally formed.

ここで前記溝部は溝幅方向の断面がＵ字状であり、前記樹脂部材は複数の半円筒部を含むこともできる。
また本発明の電池パックの製造方法は、電池ホルダに素電池を収納する、収納ステップと、前記電池ホルダ及び前記素電池を外装体で被覆する被覆ステップとを有し、前記電池ホルダとして、上記いずれかに記載の本発明の電池ホルダの製造方法により製造した電池ホルダを用い、前記収納ステップでは、前記収納空間に長尺状の前記素電池を前記第１方向に沿って収納するものとする。 Here, the groove portion has a U-shaped cross section in the groove width direction, and the resin member may include a plurality of semi-cylindrical portions.
The battery pack manufacturing method of the present invention includes a storage step of storing a unit cell in a battery holder, and a covering step of covering the battery holder and the unit cell with an exterior body. The battery holder manufactured by the method for manufacturing a battery holder according to any one of the present inventions is used, and in the storing step, the long unit cell is stored in the storage space along the first direction. .

本発明に係る電池パックでは、電池ホルダが素電池の長手方向に沿った複数の表面領域を、素電池の長手方向に沿って素電池の短手方向を通る互いに異なる方向より交互に被覆する複数の表面被覆部を有している。
このように電池ホルダにおいて各表面被覆部を配置すれば、素電池の長手方向より電池ホルダを平面視した際、各表面被覆部が素電池の長手方向に沿って互いに重なる位置関係となるのを回避できる。従って例えば射出成形法に基づき、キャビティとコアからなる比較的簡単な構成の一対の金型を用いて、良好な製造効率で電池ホルダを製造できる。これにより電池パックの製造効率も良好に向上させることが可能である。 In the battery pack according to the present invention, the battery holder alternately covers the plurality of surface regions along the longitudinal direction of the unit cell from different directions passing through the short direction of the unit cell along the longitudinal direction of the unit cell. It has a surface coating part.
If each surface covering portion is arranged in the battery holder in this way, when the battery holder is viewed in plan view from the longitudinal direction of the unit cell, the surface covering portions overlap each other along the longitudinal direction of the unit cell. Can be avoided. Therefore, for example, based on an injection molding method, a battery holder can be manufactured with good manufacturing efficiency by using a pair of molds having a relatively simple structure including a cavity and a core. Thereby, the manufacturing efficiency of the battery pack can also be improved satisfactorily.

さらに電池ホルダを一体部材で構成し、部品点数を減らしたことによっても、電池ホルダ及びこれを用いた電池パックの製造効率の向上を期待できる。
また、電池ホルダにおいて、素電池の長手方向両端面を端部被覆部で被覆し、素電池の長手方向に沿った複数の表面領域を複数の表面被覆部で被覆することで、長尺状の素電池を長手方向及び短手方向の両方より適切に保持することができる。 Furthermore, the battery holder and the battery pack using the same can be expected to be improved by configuring the battery holder as an integral member and reducing the number of parts.
Further, in the battery holder, by covering both longitudinal end faces of the unit cell with the end covering portion and covering a plurality of surface regions along the longitudinal direction of the unit cell with the plurality of surface covering portions, The unit cell can be held more appropriately than both the longitudinal direction and the lateral direction.

電池パック１の外観図である。（ａ）は上面からの外観図、（ｂ）は下面からの外観図である。1 is an external view of a battery pack 1. FIG. (A) is an external view from the upper surface, (b) is an external view from the lower surface. 電池パック１の内部構成を示す展開図（組図）である。FIG. 2 is a development view (composition diagram) showing an internal configuration of the battery pack 1. 電池ホルダ５の上面５Ｔの構成を示す図である。FIG. 4 is a diagram showing a configuration of an upper surface 5T of the battery holder 5. 電池ホルダ５の下面５Ｕの構成を示す図である。It is a figure which shows the structure of the lower surface 5U of the battery holder 5. FIG. ツメ部５６Ｂ周辺の構成を示す部分拡大図である。It is the elements on larger scale which show the structure around the nail | claw part 56B. ツメ部５６Ｂ及び庇部５５Ａ、５５Ｃ周辺の構成を示す部分拡大図である。It is the elements on larger scale which show the structure of the nail | claw part 56B and collar part 55A, 55C periphery. 素電池２０Ａ〜２０Ｆを収納した電池ホルダ５の様子を示す外観図である。（ａ）は下面５Ｕ側からの外観図、（ｂ）は上面５Ｔ側からの外観図である。It is an external view which shows the mode of the battery holder 5 which accommodated unit cell 20A-20F. (A) is an external view from the lower surface 5U side, (b) is an external view from the upper surface 5T side. 射出成形金型の形状を示す図である。（ａ）は上方から見た金型の透視図、（ｂ）は側方から見た金型の透視図である。It is a figure which shows the shape of an injection mold. (A) is a perspective view of the mold viewed from above, and (b) is a perspective view of the mold viewed from the side. 射出成形時の金型内の様子を示す部分断面図である。（ａ）はＦ₁−Ｆ₁´（Ｇ₁−Ｇ₁´）矢視断面図、（ｂ）はＦ₂−Ｆ₂´（Ｇ₂−Ｇ₂´）矢視断面図、（ｃ）はＦ₃−Ｆ₃´（Ｇ₃−Ｇ₃´）矢視断面図である。It is a fragmentary sectional view which shows the mode in the metal mold | die at the time of injection molding. (A) the _{_{_{F 1 -F 1 '(G 1}}} -G 1') cross-sectional view taken, (b) the _{_{_{F 2 -F 2 '(G 2}}} -G 2') sectional view taken along line, (c) is _{_{_{F 3 -F 3 '(G 3}}} -G 3') is an arrow cross-sectional view. 射出成形時の金型内の様子を示す部分断面図である。（ａ）はＦ₄−Ｆ₄´矢視断面図、（ｂ）はＦ₅−Ｆ₅´矢視断面図である。It is a fragmentary sectional view which shows the mode in the metal mold | die at the time of injection molding. (A) is F ₄ -F ₄ 'arrow sectional view, (b) is F ₅ -F _5' is an arrow cross-sectional view. 電池ホルダ５に被覆される素電池２０Ａ、２０Ｂの表面領域を模式的に示す図である。It is a figure which shows typically the surface area of unit cell 20A, 20B coat | covered with the battery holder 5. FIG. ツメ部５６Ｅによる効果を説明するための第１ケース部材１０Ａ及び電池ホルダ５、素電池２０Ｅの模式的な断面図である。It is typical sectional drawing of 10 A of 1st case members, the battery holder 5, and the unit cell 20E for demonstrating the effect by the nail | claw part 56E. 実施の形態２に係る電池ホルダ５ａの構成を示す図である。6 is a diagram showing a configuration of a battery holder 5a according to Embodiment 2. FIG. 実施の形態３に係る電池ホルダ５ｂの構成を示す図である。（ａ）は下面からの外観図、（ｂ）は側面からの外観図である。It is a figure which shows the structure of the battery holder 5b which concerns on Embodiment 3. FIG. (A) is an external view from a lower surface, (b) is an external view from a side surface. 実施の形態４に係る電池ホルダ５ｃの構成を示す図である。（ａ）は上面からの外観図、（ｂ）は下面からの外観図である。It is a figure which shows the structure of the battery holder 5c which concerns on Embodiment 4. FIG. (A) is an external view from the upper surface, (b) is an external view from the lower surface. 従来の電池パックに収納されるコアパックの構成を示す組図である。It is a set figure which shows the structure of the core pack accommodated in the conventional battery pack.

以下に、本発明の実施の形態を説明する。尚、当然ながら本発明は以下に示す各実施の形態に限定されず、本発明の技術的範囲を逸脱しない範囲で適宜変更することができる。
＜実施の形態１＞
（電池パック１の外観構成）
本発明の実施の形態１に係る電池パック１について図１（ａ）、図１（ｂ）を用いて説明する。図１（ａ）は電池パック１を上面側から見た外観図である。図１（ｂ）は電池パック１を下面側から見た外観図である。 Hereinafter, embodiments of the present invention will be described. Needless to say, the present invention is not limited to the following embodiments, and can be modified as appropriate without departing from the technical scope of the present invention.
<Embodiment 1>
(External configuration of battery pack 1)
A battery pack 1 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 (a) and 1 (b). FIG. 1A is an external view of the battery pack 1 as viewed from the upper surface side. FIG. 1B is an external view of the battery pack 1 as viewed from the lower surface side.

電池パック１は、一対のケース部材（第１ケース部材１０Ａ及び第２ケース部材１０Ｂ）が組み合わされてなる外装ケース１０を有し、Ｚ方向を厚み方向、Ｘ方向を幅方向、Ｙ方向を長手方向とする外観形状を持つ。第１ケース部材１０Ａ及び第２ケース部材１０Ｂの形状は、電池パック１の給電対象機器に合わせて調整されている。第２ケース部材１０Ｂには切欠部１３Ｂが設けられ、コネクタ４１が露出している。
（電池パック１の内部構成）
電池パック１の内部構成を図２に基づいて説明する。図２は電池パック１の内部構成を示す展開図（組図）である。 The battery pack 1 has an exterior case 10 in which a pair of case members (a first case member 10A and a second case member 10B) are combined. The Z direction is a thickness direction, the X direction is a width direction, and the Y direction is a longitudinal direction. Appearance shape with direction. The shapes of the first case member 10 A and the second case member 10 B are adjusted according to the power supply target device of the battery pack 1. The second case member 10B is provided with a notch 13B, and the connector 41 is exposed.
(Internal configuration of battery pack 1)
The internal configuration of the battery pack 1 will be described with reference to FIG. FIG. 2 is a developed view (composition diagram) showing the internal configuration of the battery pack 1.

図２に示すように、電池パック１は、外装ケース１０（第１ケース部材１０Ａ及び第２ケース部材１０Ｂ）と、コアパック２とを有してなる。
コアパック２は、素電池２０Ａ〜２０Ｆと、リード部材３と、保護回路基板４と、電池ホルダ５と、クッション６とを有してなる。
図２に示すように、電池パック１の全体構成としては、第１ケース部材１０Ａ及び第２ケース部材１０Ｂの内部にコアパック２を収納して構成される。 As shown in FIG. 2, the battery pack 1 includes an exterior case 10 (first case member 10 A and second case member 10 B) and a core pack 2.
The core pack 2 includes unit cells 20 A to 20 F, a lead member 3, a protection circuit board 4, a battery holder 5, and a cushion 6.
As shown in FIG. 2, the overall configuration of the battery pack 1 is configured by housing the core pack 2 inside the first case member 10A and the second case member 10B.

以下、電池パック１の各構成要素を順に説明する。
［外装ケース１０］
外装ケース１０は、第１ケース部材１０Ａと第２ケース部材１０Ｂとを有してなる（図２）。第１ケース部材１０Ａと第２ケース部材１０Ｂとは、いずれもポリカーボネート（ＰＣ）等の樹脂材料からなる射出成形品である。 Hereinafter, each component of the battery pack 1 will be described in order.
[Exterior case 10]
The exterior case 10 includes a first case member 10A and a second case member 10B (FIG. 2). The first case member 10A and the second case member 10B are both injection molded products made of a resin material such as polycarbonate (PC).

図２に示すように、第１ケース部材１０Ａ（第２ケース部材１０Ｂ）は、コアパック２が収納できる形状に形成される。第１ケース部材１０Ａは上面に切欠部１２Ａを有し、第２ケース部材１０Ｂは切欠部１２Ａに嵌合される延出部１２Ｂを有する。延出部１２Ｂにはコネクタ４１を露出するための開口部１３Ｂが形成されている。
第１ケース部材１０Ａには係合孔１１Ａが設けられ、第２ケース部材１０Ｂの内部には係合孔１１Ａと嵌合可能な係合ツメ１１Ｂが設けられる。係合ツメ１１Ｂが係合孔１１Ａに係合することで、外装ケース１０の内部が封止される。
［素電池２０Ａ〜２０Ｆ］
素電池２０Ａ〜２０Ｆは円筒型のリチウムイオン電池であり、円筒型外装缶の内部に正負両極板をセパレータを介して巻回してなる電極体と、これに含浸させた電解液が収納され、封口板で封止されてなる（不図示）。コアパック２では、素電池２０Ａ〜２０ＦはＸ方向を長手方向とし、Ｙ方向に並列されて収納される（図２）。 As shown in FIG. 2, the first case member 10 A (second case member 10 B) is formed in a shape that can accommodate the core pack 2. The first case member 10A has a notch portion 12A on the upper surface, and the second case member 10B has an extension portion 12B fitted to the notch portion 12A. An opening 13B for exposing the connector 41 is formed in the extending portion 12B.
The first case member 10A is provided with an engagement hole 11A, and the second case member 10B is provided with an engagement claw 11B that can be fitted to the engagement hole 11A. The inside of the exterior case 10 is sealed by engaging the engaging claw 11B with the engaging hole 11A.
[Unit cells 20A to 20F]
The unit cells 20A to 20F are cylindrical lithium ion batteries, in which an electrode body formed by winding positive and negative bipolar plates through a separator inside a cylindrical outer can and an electrolyte solution impregnated therein are accommodated, and sealed It is sealed with a plate (not shown). In the core pack 2, the unit cells 20 A to 20 F are stored in parallel in the Y direction with the X direction as the longitudinal direction (FIG. 2).

素電池２０Ａ〜２０Ｆは同一構成であり、外観的には周面２２Ａ〜２２Ｆと、長手（Ｙ）方向の一端面に設けられた正極端子２３Ａ〜２３Ｆと、長手（Ｙ）方向の他端面に設けられた負極端子２１Ａ〜２１Ｆとを同順に有する。周面２２Ａ〜２２Ｆはポリエチレン（ＰＥ）製の熱収縮チューブで被覆されている。
電池パック１では素電池２０Ａ〜２０Ｆとして充電容量に優れるリチウムイオン電池を利用する。しかしながら素電池２０Ａ〜２０Ｆの種類はこれに限定されず、ニッケル水素電池やニッケルカドミウム電池等、その他の二次電池を使用できる。また素電池２０Ａ〜２０Ｆは、長尺状であればよく、円筒型に限定されない。例えば角型であってもよい。
［保護回路基板４］
保護回路基板４は、基板本体４０と、コネクタ４１とを有する（図２）。 The unit cells 20A to 20F have the same configuration, and externally, the peripheral surfaces 22A to 22F, the positive terminals 23A to 23F provided on one end surface in the longitudinal (Y) direction, and the other end surface in the longitudinal (Y) direction. The provided negative terminals 21A to 21F are provided in the same order. The peripheral surfaces 22A to 22F are covered with a heat shrinkable tube made of polyethylene (PE).
In the battery pack 1, lithium ion batteries having excellent charge capacity are used as the unit cells 20A to 20F. However, the types of the unit cells 20A to 20F are not limited to this, and other secondary batteries such as a nickel hydrogen battery and a nickel cadmium battery can be used. Moreover, unit cell 20A-20F should just be elongate, and is not limited to a cylindrical type. For example, it may be square.
[Protection circuit board 4]
The protection circuit board 4 has a board body 40 and a connector 41 (FIG. 2).

基板本体４０は、コンポジット材料からなる基板の表面に、複数の電気素子（セラミックコンデンサやＩＣチップ）やサーミスタ素子等の安全素子が実装されてなる。基板本体４０の表面にはリード部材３の基板接続部３２ａ、３２ｇ、３３ｂ〜３３ｆを挿通して電気接続するためのスリット状の接続部４２〜４８が設けられる。さらに、電池ホルダ５側の位置決めピンＰ₆を挿通するための挿通孔４９Ａ、４９Ｂが設けられる。 The substrate body 40 is configured by mounting safety elements such as a plurality of electric elements (ceramic capacitors and IC chips) and thermistor elements on the surface of a substrate made of a composite material. On the surface of the substrate main body 40, slit-like connection portions 42 to 48 for inserting and electrically connecting the substrate connection portions 32a, 32g, 33b to 33f of the lead member 3 are provided. Further, insertion holes 49A for inserting the positioning pin P ₆ of the battery holder 5 side, 49B is provided.

コネクタ４１は、主としてナイロンやポリプロピレン（ＰＰ）、アクリロニトリル−ブタジエン−スチレン（ＡＢＳ）等の樹脂部材からなる本体内部に導電部材が配設されてなり、電池パック１を給電対象機器と電気接続するために用いられる。
［リード部材３］
リード部材３は、複数のリード板３ａ〜３ｇを有してなり、素電池２０Ａ〜２０Ｆを所定の配列（ここでは直列）に電気接続するとともに、保護回路基板４と素電池２０Ａ〜２０Ｆとを電気接続するために用いられる（図２）。 In the connector 41, a conductive member is arranged inside a main body mainly made of a resin member such as nylon, polypropylene (PP), acrylonitrile-butadiene-styrene (ABS), etc., in order to electrically connect the battery pack 1 to a power supply target device. Used for.
[Lead member 3]
The lead member 3 includes a plurality of lead plates 3a to 3g, and electrically connects the unit cells 20A to 20F in a predetermined arrangement (here, in series), and connects the protection circuit board 4 and the unit cells 20A to 20F. Used for electrical connection (FIG. 2).

リード板３ａ〜３ｇは、一例として通電性及び溶接特性に優れる板状の金属材料（ＮｉＰ、銅合金またはＮｉ−Ｆｅ−Ｎｉクラッド材）からなる。リード板３ａ（３ｇ）は、端子接続部３０ａ（３０ｇ）と、端子接続部３０ａ（３０ｇ）より延出された延長部３１ａ（３１ｇ）と、延長部３１ａ（３１ｇ）の末端に配された基板接続部３２ａ（３２ｇ）とを有する。同様に、リード板３ｂ〜３ｆは、一対の端子接続部３０ｂ、３１ｂ、３０ｃ、３１ｃ、３０ｄ、３１ｄ、３０ｅ、３１ｅ、３０ｆ、３１ｆと、端子接続部３０ｂ、３１ｂ、３０ｃ、３１ｃ、３０ｄ、３１ｄ、３０ｅ、３１ｅ、３０ｆ、３１ｆより延出された延長部３２ｂ〜３２ｆと、延長部３２ｂ〜３２ｆの末端に配された基板接続部３３ｂ〜３３ｆとを有する。 As an example, the lead plates 3a to 3g are made of a plate-like metal material (NiP, copper alloy, or Ni—Fe—Ni clad material) having excellent electrical conductivity and welding characteristics. The lead plate 3a (3g) includes a terminal connection portion 30a (30g), an extension portion 31a (31g) extended from the terminal connection portion 30a (30g), and a substrate disposed at the end of the extension portion 31a (31g). And a connecting portion 32a (32g). Similarly, the lead plates 3b to 3f include a pair of terminal connection portions 30b, 31b, 30c, 31c, 30d, 31d, 30e, 31e, 30f, 31f and terminal connection portions 30b, 31b, 30c, 31c, 30d, 31d. , 30e, 31e, 30f, and 31f, and extending portions 32b to 32f and board connecting portions 33b to 33f disposed at the ends of the extending portions 32b to 32f.

リード部材３の具体的な電気接続例を図２に基づいて説明する。素電池２０Ａの負極端子２１Ａには、リード板３ａの端子接続部３０ａが電気接続される。素電池２０Ａの正極端子２３Ａと素電池２０Ｂの負極端子２１Ｂにはリード板３ｂの端子接続部３０ｂ、３１ｂが同順に電気接続される。素電池２０Ｂの正極端子２３Ｂと素電池２０Ｃの負極端子２１Ｃにはリード板３ｃの端子接続部３０ｃ、３１ｃが同順に電気接続される。素電池２０Ｃの正極端子２３Ｃと素電池２０Ｄの負極端子２１Ｄにはリード板３ｄの基板接続部３０ｄ、３１ｄが同順に電気接続される。素電池２０Ｄの正極端子２３Ｄと素電池２０Ｅの負極端子２１Ｅとはリード板３ｅの基板接続部３０ｅ、３１ｅが同順に電気接続される。素電池２０Ｅの正極端子２３Ｅと素電池２０Ｆの負極端子２１Ｆにはリード板３ｆの基板接続部３０ｆ、３１ｆが同順に電気接続される。素電池２０Ｆの正極端子２３Ｆには、リード板３ｇの端子接続部３０ｇが電気接続される。このような各リード板３ａ〜３ｇと各素電池２０Ａ〜２０Ｆとの電気接続は、例えばスポット溶接でなされている。 A specific electrical connection example of the lead member 3 will be described with reference to FIG. The terminal connection part 30a of the lead plate 3a is electrically connected to the negative electrode terminal 21A of the unit cell 20A. Terminal connection portions 30b and 31b of the lead plate 3b are electrically connected in the same order to the positive terminal 23A of the unit cell 20A and the negative terminal 21B of the unit cell 20B. Terminal connection portions 30c and 31c of the lead plate 3c are electrically connected in the same order to the positive terminal 23B of the unit cell 20B and the negative terminal 21C of the unit cell 20C. The board connecting portions 30d and 31d of the lead plate 3d are electrically connected in the same order to the positive terminal 23C of the unit cell 20C and the negative terminal 21D of the unit cell 20D. The substrate connection portions 30e and 31e of the lead plate 3e are electrically connected in the same order to the positive electrode terminal 23D of the unit cell 20D and the negative electrode terminal 21E of the unit cell 20E. The board connecting portions 30f and 31f of the lead plate 3f are electrically connected in the same order to the positive terminal 23E of the unit cell 20E and the negative terminal 21F of the unit cell 20F. The terminal connection portion 30g of the lead plate 3g is electrically connected to the positive terminal 23F of the unit cell 20F. Such electrical connection between each of the lead plates 3a to 3g and each of the unit cells 20A to 20F is performed by spot welding, for example.

リード板３ａ〜３ｇの基板接続部３２ａ、３３ｂ〜３３ｆ、３２ｇは、同順に基板本体４０の接続部４２、４６、４３、４７、４５、４８、４４に電気接続される。リード板３ａ〜３ｇと基板接続部３２ａ、３３ｂ〜３３ｆ、３２ｇとは一体的に構成されている。
基板接続部３２ａ、３３ｂ〜３３ｆ、３２ｇを基板本体４０と電気接続することにより、保護回路基板４において各素電池２０Ａ〜２０Ｆの接続間の各中間電位が管理される。
［クッション６］
クッション６は、電池ホルダ５の下面側に設けられるゴム製の帯状体であり、電池パック１の衝撃吸収を行うために配設する（図２）。
［電池ホルダ５］
電池ホルダ５は、樹脂材料を射出成形してなる部品である。電池ホルダ５はその特徴の一つとして、一体部材で構成されている。 The board connecting parts 32a, 33b to 33f, 32g of the lead plates 3a to 3g are electrically connected to the connecting parts 42, 46, 43, 47, 45, 48, 44 of the board body 40 in the same order. The lead plates 3a to 3g and the board connecting portions 32a, 33b to 33f, and 32g are integrally configured.
By electrically connecting the board connecting portions 32a, 33b to 33f, and 32g to the board body 40, each intermediate potential between the connections of the unit cells 20A to 20F is managed in the protection circuit board 4.
[Cushion 6]
The cushion 6 is a rubber band provided on the lower surface side of the battery holder 5 and is disposed to absorb the impact of the battery pack 1 (FIG. 2).
[Battery holder 5]
The battery holder 5 is a part formed by injection molding a resin material. One of the features of the battery holder 5 is an integral member.

図３は、電池ホルダ５を上面５Ｔ側から見た外観図である。図４は、電池ホルダ５を下面５Ｕ側から見た外観図である。図５はツメ部５６Ｂ周辺の構成を示す部分拡大図である。図６はツメ部５６Ｂ及び庇部５５Ａ、５５Ｃ周辺の構成を示す部分拡大図である。図７は素電池２０Ａ〜２０Ｆを収納した電池ホルダ５の様子を示す外観図であり、（ａ）は下面５Ｕ側からの外観図、（ｂ）は上面５Т側からの外観図である。 FIG. 3 is an external view of the battery holder 5 as viewed from the upper surface 5T side. FIG. 4 is an external view of the battery holder 5 as viewed from the lower surface 5U side. FIG. 5 is a partially enlarged view showing the configuration around the claw 56B. FIG. 6 is a partially enlarged view showing the configuration around the claw portion 56B and the collar portions 55A and 55C. 7A and 7B are external views showing a state of the battery holder 5 in which the unit cells 20A to 20F are accommodated, wherein FIG. 7A is an external view from the lower surface 5U side, and FIG. 7B is an external view from the upper surface 5T side.

電池ホルダ５は、周面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆと、溝部５０Ａ〜５０Ｆ、５１Ａ〜５１Ｆ、５２Ａ〜５２Ｆ、５３Ａ〜５３Ｆ、５４Ａ〜５４Ｆと、庇部５５Ａ〜５５Ｆと、ツメ部５６Ａ〜５６Ｆと、基板固定部Ｐ₁、Ｐ₂と、基板載置部Ｐ₃と、リード板案内部Ｐ₄と、基板ガイドＰ₅と、位置決めピンＰ₆とを有する。 The battery holder 5 includes peripheral surface covering portions 57A to 57F, 58A to 58F, 59A to 59F, 60A to 60F, 61A to 61F, and groove portions 50A to 50F, 51A to 51F, 52A to 52F, 53A to 53F, 54A to 54F. , Flanges 55A to 55F, claw portions 56A to 56F, substrate fixing portions P ₁ and P ₂ , substrate mounting portion P ₃ , lead plate guide portion P ₄ , substrate guide P ₅ , and positioning pins and a P _6.

基板固定部Ｐ₁、Ｐ₂は電池ホルダ５上に保護回路基板４を位置決めして直接固定するためのツメ部である。
基板載置部Ｐ₃は、保護回路基板４を載置するための４箇所の突起で構成される。
リード板案内部Ｐ₄は、各リード板３ａ〜３ｇの延長部を保護回路基板４側に案内するための複数のリブで構成される。 Substrate fixing portions P ₁ and P ₂ are claw portions for positioning and directly fixing the protective circuit substrate 4 on the battery holder 5.
The substrate platform P ₃ is composed of four protrusions for placing the protection circuit substrate 4.
Lead plate guide portion P ₄ is composed of a plurality of ribs for guiding the extension of the lead plates 3a~3g to the protection circuit board 4 side.

基板ガイドＰ₅は、保護回路基板４の周縁と当接し、電池ホルダ５上で保護回路基板４を位置決めするために用いられる。
位置決めピンＰ₆は、基板本体４０の挿通孔４９Ａ、４９Ｂに挿通される突出部であり、基板ガイドＰ₅とともに電池ホルダ５上における保護回路基板４を位置決めするために用いられる。 The board guide P ₅ is in contact with the peripheral edge of the protection circuit board 4 and is used for positioning the protection circuit board 4 on the battery holder 5.
Positioning pins P ₆ are through holes 49A of the substrate main body 40, a projecting portion to be inserted into 49B, used for positioning the protective circuit board 4 on the battery holder 5 together with the substrate guide P _5.

周面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆは、素電池２０Ａ〜２０Ｆの周面２２Ａ〜２２Ｆにおける複数の表面領域を被覆する部位であり、半円筒部として構成され、Ｘ方向から見るとＵ字状断面を有している（図３、図４）。また電池ホルダ５をＸ方向から平面視した際、周面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆの各々は収納空間１Ｓ〜６Ｓを取り囲むように環状に配されている。 The peripheral surface covering portions 57A to 57F, 58A to 58F, 59A to 59F, 60A to 60F, and 61A to 61F are portions that cover a plurality of surface regions on the peripheral surfaces 22A to 22F of the unit cells 20A to 20F, and are semicylindrical. It has a U-shaped cross section when viewed from the X direction (FIGS. 3 and 4). Further, when the battery holder 5 is viewed in plan from the X direction, each of the peripheral surface covering portions 57A to 57F, 58A to 58F, 59A to 59F, 60A to 60F, and 61A to 61F is annularly formed so as to surround the storage spaces 1S to 6S. It is arranged.

溝部５３Ａ〜５３Ｆ、５２Ａ〜５２Ｆ、５４Ａ〜５４Ｆ、５０Ａ〜５０Ｆ、５１Ａ〜５１Ｆは、素電池２０Ａ〜２０Ｆの周面２２Ａ〜２２Ｆにおける複数の表面領域と当接する部位であり、周面２２Ａ〜２２Ｆに合わせた形状を有する。溝部５３Ａ〜５３Ｆ、５２Ａ〜５２Ｆ、５４Ａ〜５４Ｆ、５０Ａ〜５０Ｆ、５１Ａ〜５１Ｆは、同順に周面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆと表裏一体の関係にある。 The groove portions 53A to 53F, 52A to 52F, 54A to 54F, 50A to 50F, and 51A to 51F are portions that contact a plurality of surface regions on the peripheral surfaces 22A to 22F of the unit cells 20A to 20F, and the peripheral surfaces 22A to 22F. It has a shape tailored to. The groove portions 53A to 53F, 52A to 52F, 54A to 54F, 50A to 50F, and 51A to 51F are integrated with the peripheral surface covering portions 57A to 57F, 58A to 58F, 59A to 59F, 60A to 60F, and 61A to 61F in the same order. Are in a relationship.

電池ホルダ５を上面５Ｔ側から見た場合（図３）、周面被覆部５８Ａ〜５８Ｆ、５７Ａ〜５７Ｆ、５９Ａ〜５９ＦがＸ方向に一定間隔をおいて配置される。各周面被覆部５８Ａ〜５８Ｆ、５７Ａ〜５７Ｆ、５９Ａ〜５９Ｆの間に溝部５０Ａ〜５０Ｆ、５１Ａ〜５１Ｆが配置されている。
電池ホルダ５を下面５Ｕ側から見た場合（図４）、周面被覆部６０Ａ〜６０Ｆ、６１Ａ〜６１ＦがＸ方向に一定間隔をおいて配置される。周面被覆部６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆの間及び外側に溝部５１Ａ〜５１Ｆ、５２Ａ〜５２Ｆ、５３Ａ〜５３Ｆが配置されている。 When the battery holder 5 is viewed from the upper surface 5T side (FIG. 3), the peripheral surface covering portions 58A to 58F, 57A to 57F, and 59A to 59F are arranged at regular intervals in the X direction. Groove parts 50A to 50F and 51A to 51F are arranged between the respective peripheral surface covering parts 58A to 58F, 57A to 57F, and 59A to 59F.
When the battery holder 5 is viewed from the lower surface 5U side (FIG. 4), the peripheral surface covering portions 60A to 60F and 61A to 61F are arranged at regular intervals in the X direction. Grooves 51A to 51F, 52A to 52F, and 53A to 53F are disposed between and outside the peripheral surface covering portions 60A to 60F and 61A to 61F.

図３（図４）に示すように、周面被覆部５８Ａ〜５８Ｆ、５７Ａ〜５７Ｆ、５９Ａ〜５９Ｆ（溝部５４Ａ〜５４Ｆ、５３Ａ〜５３Ｆ、５２Ａ〜５２Ｆ）と溝部５０Ａ〜５０Ｆ、５１Ａ〜５１Ｆ（周面被覆部６１Ａ〜６１Ｆ、６０Ａ〜６０Ｆ）は、Ｘ方向に沿って、素電池２０Ａ〜２０Ｆの短手（径）方向を通る互いに異なる方向より、交互に周面２２Ａ〜２２Ｆを被覆するように配置される。具体的に周面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆは、それぞれ図３に示すＺ１〜Ｚ６方向より、周面２２Ａ〜２２Ｆを被覆するように配置される。また、周面被覆部６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆは、それぞれ図４に示すＺ７〜Ｚ１２方向より、周面２２Ａ〜２２Ｆを被覆するように配置される。一例として、Ｚ１〜Ｚ６方向とＺ７〜Ｚ１２方向は、いずれもＺ方向と平行で且つ互いに相対する方向としている。これにより電池ホルダ５では、Ｙ方向に６つの収納空間１Ｓ〜６Ｓが存在する。収納空間１Ｓ〜６Ｓには同順に素電池２０Ａ〜２０ＦがＸ方向を長手方向、Ｙ方向を並設方向として収納される（図７（ａ）、図７（ｂ）参照）。 As shown in FIG. 3 (FIG. 4), peripheral surface covering portions 58A to 58F, 57A to 57F, 59A to 59F (groove portions 54A to 54F, 53A to 53F, 52A to 52F) and groove portions 50A to 50F, 51A to 51F ( The peripheral surface covering portions 61A to 61F and 60A to 60F) alternately cover the peripheral surfaces 22A to 22F from different directions passing through the short (diameter) direction of the unit cells 20A to 20F along the X direction. Placed in. Specifically, the peripheral surface covering portions 57A to 57F, 58A to 58F, and 59A to 59F are arranged so as to cover the peripheral surfaces 22A to 22F from the Z1 to Z6 directions shown in FIG. Further, the peripheral surface covering portions 60A to 60F and 61A to 61F are arranged so as to cover the peripheral surfaces 22A to 22F from the Z7 to Z12 directions shown in FIG. As an example, the Z1 to Z6 directions and the Z7 to Z12 directions are both parallel to the Z direction and opposed to each other. Thereby, in the battery holder 5, there are six storage spaces 1S to 6S in the Y direction. In the storage spaces 1S to 6S, the unit cells 20A to 20F are stored in the same order with the X direction as the longitudinal direction and the Y direction as the parallel direction (see FIGS. 7A and 7B).

庇部５５Ａ〜５５Ｆは、電池ホルダ５のＸ方向一端部において、収納空間１Ｓ〜６Ｓの内方に突設される（図６の庇部５５Ａ、５５Ｃを参照）。これにより正極端子２３Ａ〜２３Ｆが存在する素電池２０Ａ〜２０Ｆの端部を部分的に被覆して保持する（図７（ａ）、図７（ｂ））。
ツメ部５６Ａ〜５６Ｆは、庇部５５Ａ〜５５Ｆと一対をなす素電池２０Ａ〜２０Ｆの端部被覆部であり、電池ホルダ５のＸ方向他端部において、Ｚ方向に沿って収納空間１Ｓ〜６Ｓの内方に突設される（図６のツメ部５６Ｂを参照）。これにより負極端子２１Ａ〜２１Ｆが存在する素電池２０Ａ〜２０Ｆの端部を部分的に被覆して保持する（図７（ａ）、図７（ｂ））。ツメ部５６Ａ〜５６Ｆは周面被覆部５８Ａ〜５８Ｆより連続して形成され、Ｚ方向に沿って撓ませることができる（図５及び図６のツメ部５６Ｂを参照）。素電池２０Ｂの収納時には、オペレータがツメ部５６Ａ〜５６ＦをＺ方向に沿って外方に撓ませることで、素電池２０Ａ〜２０Ｆを収納空間１Ｓ〜６Ｓにスムーズに収納できる。 The flange portions 55A to 55F are provided to protrude inward of the storage spaces 1S to 6S at one end portion in the X direction of the battery holder 5 (see the flange portions 55A and 55C in FIG. 6). Thereby, the end portions of the unit cells 20A to 20F where the positive terminals 23A to 23F are present are partially covered and held (FIGS. 7A and 7B).
The claw portions 56A to 56F are end portion covering portions of the unit cells 20A to 20F that form a pair with the flange portions 55A to 55F. At the other end portion in the X direction of the battery holder 5, the storage spaces 1S to 6S are formed along the Z direction. Projecting inward (see claw 56B in FIG. 6). Thereby, the end portions of the unit cells 20A to 20F where the negative terminals 21A to 21F are present are partially covered and held (FIGS. 7A and 7B). The claw portions 56A to 56F are formed continuously from the peripheral surface covering portions 58A to 58F, and can be bent along the Z direction (see claw portions 56B in FIGS. 5 and 6). When the unit cell 20B is stored, the operator can smoothly store the unit cells 20A to 20F in the storage spaces 1S to 6S by bending the claw portions 56A to 56F outward along the Z direction.

庇部５５Ａ〜５５Ｆとツメ部５６Ａ〜５６Ｆは、素電池２０Ａ〜２０Ｆの配列に合わせてＹ方向に交互に配置されている（図３）。
このように電池ホルダ５は、素電池２０Ａ〜２０Ｆをその長手（Ｘ）方向両端と、周面２２Ａ〜２２Ｆに垂直な方向を含む複数の方向より適切に保持できる。特に電池ホルダ５をＸ方向より平面視した際、素電池２０Ａ〜２０Ｆは周面２２Ａ〜２２Ｆの全周がいずれかの周面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆで覆われており、電池ホルダ５によって良好に保持される。 The flange portions 55A to 55F and the claw portions 56A to 56F are alternately arranged in the Y direction according to the arrangement of the unit cells 20A to 20F (FIG. 3).
As described above, the battery holder 5 can appropriately hold the unit cells 20A to 20F in a plurality of directions including both ends in the longitudinal (X) direction and directions perpendicular to the peripheral surfaces 22A to 22F. In particular, when the battery holder 5 is viewed in a plan view from the X direction, the unit cells 20A to 20F have either one of the peripheral surface covering portions 57A to 57F, 58A to 58F, 59A to 59F, 60A to 60F. , 61 A to 61 F and are held well by the battery holder 5.

電池ホルダ５では、半円筒状の表面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１ＦをＸ方向に沿って、素電池２０Ａ〜２０Ｆの周面２２Ａ〜２２ＦをＺ軸上の片面側及びその反対面側より交互に配置している。このため、Ｚ方向或いは逆Ｚ方向から電池ホルダ５を見ると、各表面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆは互いに重ならない配置関係を有する。 In the battery holder 5, the peripheral surfaces 22A to 22F of the unit cells 20A to 20F are arranged along the X direction through the semi-cylindrical surface covering portions 57A to 57F, 58A to 58F, 59A to 59F, 60A to 60F, 61A to 61F. They are alternately arranged from one side on the Z axis and from the opposite side. For this reason, when the battery holder 5 is viewed from the Z direction or the reverse Z direction, the surface covering portions 57A to 57F, 58A to 58F, 59A to 59F, 60A to 60F, and 61A to 61F have an arrangement relationship that does not overlap each other.

このように電池ホルダ５では、上面５Ｔ及び下面５Ｕに存在する全ての表面領域がＺ方向或いは逆Ｚ方向に沿って外部に解放され、上面５Ｔ及び下面５Ｕを平面視した際に重なって隠れる表面領域がほぼ存在しない。電池パック１では、電池ホルダ５をこのような形状とすることで、射出成形法に基づき、キャビティ及びコアのみの組み合わせからなる比較的簡単な一対の金型を用いて電池ホルダ５を一体部材で比較的簡単に構成することができる。
（電池パック１の製造工程）
以下、電池パック１の製造工程を例示する。
［電池ホルダ５の製造］
電池ホルダ５を射出成形法に基づき製造する。 As described above, in the battery holder 5, all the surface regions existing on the upper surface 5T and the lower surface 5U are released to the outside along the Z direction or the reverse Z direction, and the surface is hidden by overlapping when the upper surface 5T and the lower surface 5U are viewed in plan. There is almost no area. In the battery pack 1, by forming the battery holder 5 in such a shape, the battery holder 5 is formed as an integral member using a relatively simple pair of molds composed of only a cavity and a core based on an injection molding method. It can be configured relatively easily.
(Production process of battery pack 1)
Hereinafter, the manufacturing process of the battery pack 1 will be exemplified.
[Manufacture of battery holder 5]
The battery holder 5 is manufactured based on an injection molding method.

図８に電池ホルダ５の射出成形に用いる固定金型のキャビティ７Ａ（第１金型）と可動金型のコア７Ｂ（第２金型）とを示す。図８（ａ）はキャビティ７Ａ及びコア７Ｂを上方から見た透視図である。図８（ｂ）はキャビティ７Ａ及びコア７Ｂを側方から見た透視図である。さらに図９（ａ）、図９（ｂ）、図９（ｃ）、図１０（ａ）、図１０（ｂ）は、同順に射出成形時における図８（ａ）のＦ₁−Ｆ₁´（図８（ｂ）のＧ₁−Ｇ₁´））矢視断面図、Ｆ₂−Ｆ₂´（図８（ｂ）のＧ₂−Ｇ₂´））矢視断面図、Ｆ₃−Ｆ₃´（図８（ｂ）のＧ₃−Ｇ₃´））矢視断面図、Ｆ₄−Ｆ₄´矢視断面図、Ｆ₅−Ｆ₅´矢視断面図を示す。 FIG. 8 shows a cavity 7A (first mold) of a fixed mold and a core 7B (second mold) of a movable mold used for injection molding of the battery holder 5. FIG. 8A is a perspective view of the cavity 7A and the core 7B as viewed from above. FIG. 8B is a perspective view of the cavity 7A and the core 7B viewed from the side. Further, FIG. 9A, FIG. 9B, FIG. 9C, FIG. 10A, and FIG. 10B are the same as F ₁ -F ₁ ′ in FIG. (G ₁ -G ₁ in FIG. 8 (b) ')) sectional view taken along _{_{_{line, F 2 -F 2' G 2}}} -G 2 (FIG. 8 (b) ')) sectional view taken along line, F ₃ -F ₃ ′ (G ₃ -G ₃ ′ in FIG. 8B)) arrow cross-sectional view, F ₄ -F ₄ ′ cross-sectional view, and F ₅ -F ₅ ′ cross-sectional view are shown.

図８の各図では、キャビティ７Ａの射出空間７０Ａ、コア７Ｂの射出空間７０Ｂの輪郭を点線で示している。キャビティ７Ａの上面には、射出空間７０Ａに連通する５箇所の溶融樹脂の射出口Ｇ０が設けられている。各図中のＬはキャビティ７Ａとコア７Ｂの合わせ目である。射出空間７０Ａ、７０Ｂは、電池ホルダ５の形状に合わせて形成されている。
すなわちキャビティ７Ａ及びコア７Ｂには、図８（ａ）、図８（ｂ）及び図９（ａ）〜（ｃ）に示すように、周面被覆部５７Ｅ〜５９Ｅ、５７Ｄ〜５９Ｄ、５７Ａ〜５９Ａを形成する位置に、Ｘ方向を長手方向とする金型溝部７２Ｅ、７４Ｅ、７８Ｅ、８０Ｅ、７２Ｄ、７４Ｄ、７８Ｄ、８０Ｄ、７２Ａ、７４Ａ、７８Ａ、８０Ａと、これらに射出空間７０Ａ、７０Ｂをおいて嵌合可能な凸部７１Ｅ、７３Ｅ、７５Ｅ、７７Ｅ、７９Ｅ、７１Ｄ、７３Ｄ、７５Ｄ、７７Ｄ、７９Ｄ、７１Ａ、７３Ａ、７５Ａ、７７Ａ、７９Ａとが形成されている。 In each drawing of FIG. 8, the outlines of the injection space 70A of the cavity 7A and the injection space 70B of the core 7B are indicated by dotted lines. Five molten resin injection ports G0 communicating with the injection space 70A are provided on the upper surface of the cavity 7A. L in each figure is the joint of the cavity 7A and the core 7B. The injection spaces 70 A and 70 B are formed according to the shape of the battery holder 5.
That is, as shown in FIGS. 8A, 8B, and 9A to 9C, the peripheral surface covering portions 57E to 59E, 57D to 59D, and 57A to 59A are provided in the cavity 7A and the core 7B. Mold groove 72E, 74E, 78E, 80E, 72D, 74D, 78D, 80D, 72A, 74A, 78A, 80A, and injection spaces 70A, 70B are provided in these positions. And convex portions 71E, 73E, 75E, 77E, 79E, 71D, 73D, 75D, 77D, 79D, 71A, 73A, 75A, 77A, and 79A that can be fitted.

金型溝部７２Ｅ、７４Ｅ、７８Ｅ、８０Ｅ、７２Ｄ、７４Ｄ、７８Ｄ、８０Ｄ、７２Ａ、７４Ａ、７８Ａ、８０Ａと、凸部７１Ｅ、７３Ｅ、７５Ｅ、７７Ｅ、７９Ｅ、７１Ｄ、７３Ｄ、７５Ｄ、７７Ｄ、７９Ｄ、７１Ａ、７３Ａ、７５Ａ、７７Ａ、７９Ａとは、Ｘ方向に沿って交互に配置される。尚、これと同様に、キャビティ７Ａ及びコア７Ｂの対向表面には、電池ホルダ５のその他の周面被覆部を形成する位置にも金型溝部と凸部とが形成されている（図１０（ａ）〜（ｂ）を参照）。 Mold grooves 72E, 74E, 78E, 80E, 72D, 74D, 78D, 80D, 72A, 74A, 78A, 80A, and convex portions 71E, 73E, 75E, 77E, 79E, 71D, 73D, 75D, 77D, 79D, 71A, 73A, 75A, 77A, 79A are alternately arranged along the X direction. Similarly to this, on the opposing surfaces of the cavity 7A and the core 7B, mold groove portions and convex portions are also formed at positions where other peripheral surface covering portions of the battery holder 5 are formed (FIG. 10 ( a) to (b)).

電池ホルダ５の製造時には、キャビティ７Ａを固定し、コア７ＢをＺ方向に移動させてキャビティ７Ａに接触させるように配置する（配置ステップ）。その後、キャビティ７Ａ及びコア７Ｂの間に形成される射出空間７０Ａ、７０Ｂに対し、射出口Ｇ０より溶融樹脂を射出し、射出成形を行う（成形ステップ）。
ここで、電池ホルダ５の上面５Ｔ及び下面５Ｕにおける各表面領域は、いずれもＺ方向或いは逆Ｚ方向に沿って外部に解放され、これらの方向より平面視した際に影となる表面領域（アンダーカット領域）が存在しない。従って成形ステップでは、図９（ａ）〜（ｃ）、図１０（ａ）〜（ｂ）の各図に示すように、複雑なスライド金型を用いなくても、キャビティ７Ａ及びコア７Ｂの組み合わせだけで電池ホルダ５を射出成形することができる。これにより電池パック１の製造効率の向上を期待できる。また、キャビティ７Ａ及びコア７Ｂのみを使用したシンプルな金型構造とすることで、金型のイニシャルコストの低減にも一定の効果を望むことができる。 At the time of manufacturing the battery holder 5, the cavity 7A is fixed, and the core 7B is moved in the Z direction so as to be brought into contact with the cavity 7A (arrangement step). Thereafter, molten resin is injected from the injection port G0 into the injection spaces 70A and 70B formed between the cavity 7A and the core 7B, and injection molding is performed (molding step).
Here, each surface region on the upper surface 5T and the lower surface 5U of the battery holder 5 is released to the outside along the Z direction or the reverse Z direction, and is a surface region (under) that becomes a shadow when viewed in plan from these directions. (Cut area) does not exist. Therefore, in the molding step, as shown in FIGS. 9A to 9C and FIGS. 10A to 10B, the combination of the cavity 7A and the core 7B is possible without using a complicated slide mold. Only the battery holder 5 can be injection molded. Thereby, the improvement of the manufacturing efficiency of the battery pack 1 can be expected. In addition, by using a simple mold structure that uses only the cavity 7A and the core 7B, a certain effect can be expected to reduce the initial cost of the mold.

さらに、キャビティ７Ａ及びコア７Ｂのみを使用することにより、射出成形される電池ホルダ５には、基本的にパートラインがキャビティ７Ａ及びコア７Ｂの合わせ目Ｌに沿った部分にしか形成されない（図８（ｂ）参照）。このようにパートラインが少ないので、電池ホルダ５の成形精度を維持し易いという利点がある。
［素電池２０Ａ〜２０Ｆの収納］
上記作製した電池ホルダ５の各収納空間１Ｓ〜６Ｓ（図３、図４参照）に素電池２０Ａ〜２０Ｆをそれぞれ収納する。このときツメ部５６Ａ〜５６Ｆは素電池２０Ａ〜２０Ｆに押されてＺ方向に撓み、素電池２０Ａ〜２０Ｆを乗り越えると元の形状に復元する。 Further, by using only the cavity 7A and the core 7B, the battery holder 5 to be injection-molded basically has a part line formed only at a portion along the joint L of the cavity 7A and the core 7B (FIG. 8). (See (b)). Thus, since there are few part lines, there exists an advantage that the shaping | molding precision of the battery holder 5 is easy to be maintained.
[Storage of unit cells 20A to 20F]
The unit cells 20 A to 20 F are stored in the storage spaces 1 S to 6 S (see FIGS. 3 and 4) of the battery holder 5 manufactured as described above. At this time, the claw portions 56A to 56F are pushed by the unit cells 20A to 20F and bent in the Z direction, and when the unit cells 20A to 20F are overcome, the original shape is restored.

電池ホルダ５内では、ツメ部５６Ａ〜５６Ｆ及び庇部５５Ａ〜５５Ｆによって各素電池２０Ａ〜２０ＦのＸ方向に沿った位置が規制される。さらに各素電池２０Ａ〜２０Ｆの周面の一部（図１１のａ１〜ａ５、ｂ１〜ｂ５を参照）が各周面被覆部５７、５８、５９、６０、６１に被覆されることよって、各素電池２０Ａ〜２０ＦのＹＺ平面上の各方向に沿った位置が規制される。 In the battery holder 5, the positions along the X direction of the respective unit cells 20A to 20F are regulated by the claw portions 56A to 56F and the flange portions 55A to 55F. Further, a part of the peripheral surface of each of the unit cells 20A to 20F (see a1 to a5 and b1 to b5 in FIG. 11) is covered with each peripheral surface covering portion 57, 58, 59, 60, 61, The position along each direction on the YZ plane of the unit cells 20A to 20F is regulated.

ここで図１１は、電池ホルダ５により被覆される素電池２０Ａ、２０Ｂの表面領域を模式的に示す図である。電池ホルダ５では当図に示すように、素電池２０Ａ（２０Ｂ）において、径方向を通るＺ方向の両側に位置する半円筒状の複数の表面領域ａ１〜ａ５（ｂ１〜ｂ５）が、長手（Ｘ）方向に沿って周面被覆部５７Ａ〜５９Ａ、６０Ａ〜６１Ａ（５７Ｂ〜５９Ｂ、６０Ｂ〜６１Ｂ）（図７（ａ）、（ｂ）参照）により交互に被覆される。また、長手（Ｘ）方向両端部の一部の表面領域ａ６、ａ７（ｂ６、ｂ７）が、ツメ部５６Ａ、５６Ｂ及び庇部５５Ａ、５５Ｂにより被覆される。 Here, FIG. 11 is a diagram schematically showing the surface regions of the unit cells 20 A and 20 B covered with the battery holder 5. In the battery holder 5, as shown in the figure, in the unit cell 20A (20B), a plurality of semi-cylindrical surface regions a1 to a5 (b1 to b5) positioned on both sides in the Z direction passing through the radial direction are long ( X) The peripheral surface covering portions 57A to 59A and 60A to 61A (57B to 59B, 60B to 61B) (see FIGS. 7A and 7B) are alternately covered along the direction X. Further, part of the surface regions a6 and a7 (b6 and b7) at both ends in the longitudinal (X) direction are covered with the claw portions 56A and 56B and the flange portions 55A and 55B.

尚、図１１には図示しないが、その他の素電池２０Ｃ〜２０Ｆの各表面領域も、同様に電池ホルダ５において被覆される。
これにより電池ホルダ５内において、各素電池２０Ａ〜２０ＦはＸＹＺ各方向を含む全方向に対して安定した位置に保持される。特に電池ホルダ５をＸ方向より平面視すると、各素電池２０Ａ〜２０Ｆの周面２２Ａ〜２２Ｆの各全周がいずれかの周面被覆部５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆにより被覆されている。 Although not shown in FIG. 11, the surface regions of the other unit cells 20 C to 20 F are similarly covered with the battery holder 5.
Thereby, in the battery holder 5, each unit cell 20A-20F is hold | maintained in the stable position with respect to all the directions including XYZ each direction. In particular, when the battery holder 5 is viewed in a plan view from the X direction, each of the peripheral surfaces 22A to 22F of each of the unit cells 20A to 20F has one of the peripheral surface covering portions 57A to 57F, 58A to 58F, 59A to 59F, 60A to 60A. It is covered with 60F and 61A to 61F.

従って、電池ホルダ５から素電池２０Ａ〜２０Ｆが脱落するおそれが少なく、その後の工程を良好に行えるので、製造効率の向上を期待できる。
［リード部材３の電気接続等］
図２に示す各リード板３ａ〜３ｇと各素電池２０Ａ〜２０Ｆとの配置関係に従い、各リード板３ａ〜３ｇを各素電池２０Ａ〜２０Ｆとそれぞれ電気接続する。 Accordingly, the unit cells 20A to 20F are less likely to drop off from the battery holder 5, and the subsequent steps can be performed satisfactorily, so that improvement in manufacturing efficiency can be expected.
[Electrical connection of the lead member 3]
Each lead plate 3a-3g is electrically connected with each unit cell 20A-20F according to the arrangement relationship between each lead plate 3a-3g and each unit cell 20A-20F shown in FIG.

素電池２０Ａの負極端子２１Ａに対し、リード板３ａの端子接続部３０ａをシリーズスポット溶接で電気接続する。
素電池２０Ａの正極端子２３Ａと素電池２０Ｂの負極端子２１Ｂとに、同順にリード板３ｂの端子接続部３０ｂ、３１ｂをシリーズスポット溶接で電気接続する。
素電池２０Ｂの正極端子２３Ｂと素電池２０Ｃの負極端子２１Ｃとに、リード板３ｃの端子接続部３０ｃ、３１ｃをシリーズスポット溶接で電気接続する。 The terminal connection portion 30a of the lead plate 3a is electrically connected to the negative electrode terminal 21A of the unit cell 20A by series spot welding.
The terminal connection portions 30b and 31b of the lead plate 3b are electrically connected to the positive terminal 23A of the unit cell 20A and the negative terminal 21B of the unit cell 20B in the same order by series spot welding.
The terminal connection portions 30c and 31c of the lead plate 3c are electrically connected to the positive terminal 23B of the unit cell 20B and the negative terminal 21C of the unit cell 20C by series spot welding.

素電池２０Ｃの正極端子２３Ｃと素電池２０Ｄの負極端子２１Ｄとに、リード板３ｄの基板接続部３０ｄ、３１ｄをシリーズスポット溶接で電気接続する。
素電池２０Ｄの正極端子２３Ｄと素電池２０Ｅの負極端子２１Ｅとに、リード板３ｅの基板接続部３０ｅ、３１ｅをシリーズスポット溶接で電気接続する。
素電池２０Ｅの正極端子２３Ｅと素電池２０Ｆの負極端子２１Ｆとに、リード板３ｆの基板接続部３０ｆ、３１ｆをシリーズスポット溶接で電気接続する。 The board connecting portions 30d and 31d of the lead plate 3d are electrically connected to the positive terminal 23C of the unit cell 20C and the negative terminal 21D of the unit cell 20D by series spot welding.
The board connection portions 30e and 31e of the lead plate 3e are electrically connected to the positive terminal 23D of the unit cell 20D and the negative terminal 21E of the unit cell 20E by series spot welding.
The board connecting portions 30f and 31f of the lead plate 3f are electrically connected to the positive terminal 23E of the unit cell 20E and the negative terminal 21F of the unit cell 20F by series spot welding.

素電池２０Ｆの正極端子２３Ｆに、リード板３ｇの端子接続部３０ｇをシリーズスポット溶接で電気接続する。
各リード板３ａ〜３ｇの延長部３１ａ、３２ｂ〜３２ｆ、３１ｇを電池ホルダ５のＸ方向或いは逆Ｘ方向に曲折加工する。一方、延長部３１ａ、３２ｂ〜３２ｆ、３１ｇに対して基板接続部３２ａ、３３ｂ〜３３ｆ、３２ｇをＺ方向に曲折加工する（図２）。
［保護回路基板４の配設］
基板本体４０のＹ方向周縁を基板ガイドＰ₅と当接させ、位置決めピンＰ₆を挿通孔４９Ａ、４９Ｂに挿通させる（図２）。保護回路基板４を電池ホルダ５の基板固定部Ｐ₁、Ｐ₂の間に取り付ける（図２、図３参照）。さらに、基板本体４０の接続部４２〜４８に基板接続部３２ａ、３３ｂ〜３３ｆ、３２ｇを挿通させる。この状態で接続部４２〜４８に基板接続部３２ａ、３３ｂ〜３３ｆ、３２ｇとをはんだ溶接で電気接続する。 The terminal connection portion 30g of the lead plate 3g is electrically connected to the positive electrode terminal 23F of the unit cell 20F by series spot welding.
The extension portions 31a, 32b to 32f, 31g of the lead plates 3a to 3g are bent in the X direction or the reverse X direction of the battery holder 5. On the other hand, the board connecting portions 32a, 33b to 33f, and 32g are bent in the Z direction with respect to the extending portions 31a, 32b to 32f, and 31g (FIG. 2).
[Disposition of protection circuit board 4]
The Y-direction periphery of the substrate main body 40 is brought into contact with the substrate guide P _5, inserting the positioning pin P ₆ insertion hole 49A, the 49B (FIG. 2). The protection circuit board 4 is attached between the board fixing parts P ₁ and P ₂ of the battery holder 5 (see FIGS. 2 and 3). Furthermore, the board connection parts 32a, 33b to 33f, and 32g are inserted into the connection parts 42 to 48 of the board body 40. In this state, the board connection parts 32a, 33b to 33f, and 32g are electrically connected to the connection parts 42 to 48 by solder welding.

電池ホルダ５の下面５Ｕ側に両面テープ等を用いてクッション６を取り付ける（図２）。
以上でコアパック２が完成する。
［電池パック１の完成］
第１ケース１０Ａの内部にコアパック２を一部収納する（図２）。このとき第１ケース１０Ａの内部では、図１２に示す断面図のように、ツメ部５６Ｅが第１ケース部材の内面と当接する。ツメ部５６Ｅの位置は、素電池２０Ｅの負極端子２１Ｅを被覆した状態で規制され、外部に撓むことが無い。これによりツメ部５６Ｅは素電池２０Ｅの周面２２Ｅと第１ケース１０Ａの内面の両方に当接するため、素電池２０Ｅが電池ホルダ５に確実に保持され、外部に脱落しない。尚、その他のツメ部５６Ａ〜５６Ｄ、５６Ｆも同様に第１ケース部材１０Ａの内面と当接して位置規制され、素電池２０Ａ〜２０Ｄ、２０Ｆが電池ホルダ５によって確実に保持される。 The cushion 6 is attached to the lower surface 5U side of the battery holder 5 using a double-sided tape or the like (FIG. 2).
Thus, the core pack 2 is completed.
[Completion of battery pack 1]
A part of the core pack 2 is accommodated in the first case 10A (FIG. 2). At this time, in the first case 10A, as shown in the cross-sectional view of FIG. 12, the claw portion 56E contacts the inner surface of the first case member. The position of the claw portion 56E is regulated in a state where the negative electrode terminal 21E of the unit cell 20E is covered, and does not bend to the outside. As a result, the claw portion 56E comes into contact with both the peripheral surface 22E of the unit cell 20E and the inner surface of the first case 10A, so that the unit cell 20E is securely held by the battery holder 5 and does not fall out. The other claw portions 56 A to 56 D and 56 F are similarly positioned in contact with the inner surface of the first case member 10 A, and the unit cells 20 A to 20 D and 20 F are securely held by the battery holder 5.

その後、第１ケース部材１０Ａの係合孔１１Ａに第２ケース部材１０Ｂの係合ツメ１１Ｂを係合させる。
以上で電池パック１が完成する。
次に、本発明の別の実施の形態について、実施の形態１との差異を中心に説明する。
＜実施の形態２＞
図１３は本発明の実施の形態２に係る電池ホルダ５ａの外観図である。 Thereafter, the engagement claw 11B of the second case member 10B is engaged with the engagement hole 11A of the first case member 10A.
Thus, the battery pack 1 is completed.
Next, another embodiment of the present invention will be described focusing on differences from the first embodiment.
<Embodiment 2>
FIG. 13 is an external view of a battery holder 5a according to Embodiment 2 of the present invention.

電池ホルダ５との違いは、周面被覆部５７Ａ〜５７Ｆに対し、Ｘ方向に横断するスリット６２Ａ〜６２Ｆを設けた点にある。各スリット６２Ａ〜６２Ｆの幅は、周面被覆部５７Ａ〜５７Ｆの幅よりも十分に狭く設定されている。
このような構成を有する電池ホルダ５ａを用いた場合も、実施の形態１と同様の効果を期待できる。また、スリット６２Ａ〜６２Ｆの採用により電池ホルダ５ａの重量を軽減し、部材コストをさらに低くできる利点を有する。
＜実施の形態３＞
図１４は本発明の実施の形態４に係る電池ホルダ５ｂの外観図である。（ａ）は電池ホルダ５ｂを下面側から見た外観図、（ｂ）は電池ホルダ５ｃを側面から見た外観図である。 The difference from the battery holder 5 is that slits 62A to 62F that cross in the X direction are provided in the peripheral surface covering portions 57A to 57F. The widths of the slits 62A to 62F are set to be sufficiently narrower than the widths of the peripheral surface covering portions 57A to 57F.
Even when the battery holder 5a having such a configuration is used, the same effect as in the first embodiment can be expected. Further, the adoption of the slits 62A to 62F has an advantage that the weight of the battery holder 5a can be reduced and the member cost can be further reduced.
<Embodiment 3>
FIG. 14 is an external view of a battery holder 5b according to Embodiment 4 of the present invention. (A) is the external view which looked at the battery holder 5b from the lower surface side, (b) is the external view which looked at the battery holder 5c from the side surface.

電池ホルダ５との違いは、周面被覆部６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆに対し、Ｘ方向に横断するスリット６３Ａ〜６３Ｆ、６４Ａ〜６４Ｆを設けた点にある。実施の形態２と同様に、スリット６３Ａ〜６３Ｆ、６４Ａ〜６４Ｆの幅は、周面被覆部６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆの幅よりも十分に狭く設定されている（図１４（ｂ））。
このような構成を有する電池ホルダ５ｂを用いた場合も、実施の形態１及び２とほぼ同様の効果を期待できる。すなわち、各素電池２０Ａ〜２０Ｆを一体部材からなる電池ホルダ５ｂで複数の方向より適切に保持でき、且つ、電池パックの製造効率を向上させることができる。さらに、スリット６３Ａ〜６３Ｆ、６４Ａ〜６４Ｆの採用により電池ホルダ５ｂの重量を軽減し、部材コストを低く抑える効果を奏する。 The difference from the battery holder 5 is that slits 63A to 63F and 64A to 64F that cross in the X direction are provided for the peripheral surface covering portions 60A to 60F and 61A to 61F. Similar to the second embodiment, the widths of the slits 63A to 63F and 64A to 64F are set to be sufficiently narrower than the widths of the peripheral surface covering portions 60A to 60F and 61A to 61F (FIG. 14B).
Even when the battery holder 5b having such a configuration is used, substantially the same effect as in the first and second embodiments can be expected. That is, the unit cells 20A to 20F can be appropriately held in a plurality of directions by the battery holder 5b made of an integral member, and the manufacturing efficiency of the battery pack can be improved. Further, the adoption of the slits 63A to 63F and 64A to 64F has an effect of reducing the weight of the battery holder 5b and reducing the member cost.

尚、実施の形態２、３で電池ホルダに設けるスリットの数は適宜調節が可能であるが、あまりスリットの数を多くすると電池ホルダの剛性が低下することに留意すべきである。
＜実施の形態４＞
図１５は本発明の実施の形態３に係る電池ホルダ５ｃの外観図である。（ａ）は電池ホルダ５ｃを上面側から見た外観図、（ｂ）は電池ホルダ５ｃを下面側から見た外観図である。 In addition, although the number of slits provided in the battery holder in Embodiments 2 and 3 can be adjusted as appropriate, it should be noted that the rigidity of the battery holder is reduced when the number of slits is increased too much.
<Embodiment 4>
FIG. 15 is an external view of a battery holder 5c according to Embodiment 3 of the present invention. (A) is the external view which looked at the battery holder 5c from the upper surface side, (b) is the external view which looked at the battery holder 5c from the lower surface side.

電池ホルダ５との違いは、溝部５０Ａ〜５０Ｆ（及び周面被覆部６０Ａ〜６０Ｆ）を省略し、周面被覆部５８Ａ〜５８Ｆと周面被覆部５７Ａ〜５７Ｆ（溝部５２Ａ〜５２Ｆと溝部５３Ａ〜５３Ｆ）とを隔てることなくそれぞれＸ方向に連続させた点にある。
このような構成を有する電池ホルダ５ｃを用いた場合も、実施の形態１と同様の効果を期待できる。また、電池ホルダ５に比べて高い剛性を期待することができる。
＜その他の事項＞
本発明において、電池ホルダに収納する素電池の数は当然ながら６個に限定されず、これ以外の数であってもよい。また、電池ホルダの一の収納空間に複数の素電池を直列で収納することもできる。 The difference from the battery holder 5 is that the groove portions 50A to 50F (and the peripheral surface covering portions 60A to 60F) are omitted, and the peripheral surface covering portions 58A to 58F and the peripheral surface covering portions 57A to 57F (the groove portions 52A to 52F and the groove portions 53A to 53A). 53F) are continuous in the X direction without being separated from each other.
Even when the battery holder 5c having such a configuration is used, the same effect as in the first embodiment can be expected. In addition, higher rigidity than the battery holder 5 can be expected.
<Other matters>
In the present invention, the number of unit cells stored in the battery holder is naturally not limited to six, and may be other numbers. A plurality of unit cells can be stored in series in one storage space of the battery holder.

また、外装ケースに収納する電池ホルダは１個に限定されず、２個以上であってもよい。
実施の形態１では回路基板として保護回路基板４を示したが、当然ながら保護回路基板４以外の回路基板を用いても良い。
実施の形態１の金型では７Ａをキャビティ、７Ｂをコアとしたが、これとは逆に７Ａをコア、７Ｂをキャビティとすることもできる。 Moreover, the battery holder accommodated in the exterior case is not limited to one, and may be two or more.
Although the protection circuit board 4 is shown as the circuit board in the first embodiment, a circuit board other than the protection circuit board 4 may be used as a matter of course.
In the mold according to the first embodiment, 7A is a cavity and 7B is a core. On the contrary, 7A can be a core and 7B can be a cavity.

実施の形態１では、電池ホルダの各周面被覆部が素電池の周面の表面領域をほぼ半周分被覆するサイズとしている（図７（ａ）、（ｂ）、図１１参照）。しかしながら、周面被覆部のサイズは適宜調節が可能であり、これに限定されない。但し、周面被覆部があまり小さいと、周面被覆部で素電池の周面を良好に保持するのが困難になる。目安としては、電池ホルダをＸ方向から平面視した場合、各周面被覆部のサイズを素電池の全周の１／４程度以上、１／２程度以下に対応する表面領域を被覆できるサイズとするのが望ましい。 In the first embodiment, each peripheral surface covering portion of the battery holder is of a size that covers the surface area of the peripheral surface of the unit cell by almost half a circumference (see FIGS. 7A, 7B, and 11). However, the size of the peripheral surface covering portion can be appropriately adjusted, and is not limited to this. However, if the peripheral surface covering portion is too small, it is difficult to satisfactorily hold the peripheral surface of the unit cell with the peripheral surface covering portion. As a guideline, when the battery holder is viewed in plan from the X direction, the size of each peripheral surface covering portion is a size that can cover a surface area corresponding to about 1/4 or more and about 1/2 or less of the entire circumference of the unit cell. It is desirable to do.

本発明の電池ホルダは、素電池の複数の表面領域を、素電池の長手方向に沿って、複数の周面被覆部が径方向を通る一定の方向より交互に被覆する構成としている。しかしながら本発明で周面被覆部が「交互に被覆する」素電池の表面領域は、幾何学的に定義される厳密な表面領域のみに限定されない。すなわち実施の形態２（図１３）及び実施の形態３（図１４）のように、各スリットにより素電池の周面を多少外部に露出させながら、各周面被覆部で素電池の周面を被覆する場合も含む。 The battery holder of the present invention is configured such that the plurality of surface regions of the unit cell are alternately covered along the longitudinal direction of the unit cell from a certain direction in which the plurality of peripheral surface covering portions pass in the radial direction. However, in the present invention, the surface area of the unit cell that is “alternately covered” by the peripheral surface covering portion is not limited to a strict surface area defined geometrically. That is, as in the second embodiment (FIG. 13) and the third embodiment (FIG. 14), the peripheral surface of the unit cell is covered with each peripheral surface covering portion while the peripheral surface of the unit cell is slightly exposed to the outside by each slit. Including the case of coating.

上記各実施の形態では、一対の端部被覆部のうち一方をツメ部、他方を庇部としたが、両方をツメ部としてもよい。 In each of the above embodiments, one of the pair of end cover portions is a claw portion and the other is a collar portion, but both may be claw portions.

本発明に係る電池パックは、例えばノート型コンピュータ、携帯電話、ＰＤＡ、タブレット、ポータブルＤＶＤプレーヤ、携帯型ＧＰＳ、トランシーバ等の電子機器、或いは電動工具、ハンディ型掃除機等の主電源またはバックアップ用電源として幅広く利用できる。或いはパワーアシスト自転車の主電源としても利用できる。 The battery pack according to the present invention is a main power source or backup power source for electronic devices such as notebook computers, mobile phones, PDAs, tablets, portable DVD players, portable GPS, transceivers, or power tools, handy vacuum cleaners, etc. Can be used widely. Alternatively, it can be used as a main power source for a power assist bicycle.

Ｐ₁、Ｐ₂ 基板固定部
Ｐ₃ 基板載置部
Ｐ₄ リード板案内部
Ｐ₅ 基板ガイド
Ｐ₆ 位置決めピン
１Ｓ〜６Ｓ収納空間
ａ１〜ａ７、ｂ１〜ｂ７素電池の表面領域
１電池パック
２コアパック
３リード部材
３ａ〜３ｇリード板
４保護回路基板
５、５ａ〜５ｃ電池ホルダ
５Ｔ電池ホルダの上面
５Ｕ電池ホルダの下面
６クッション
７Ａキャビティ（固定金型）
７Ｂコア（移動金型）
１０外装ケース
１０Ａ第１ケース部材
１０Ｂ第２ケース部材
１１Ａ嵌合孔
１１Ｂ係合ツメ
２０Ａ〜２０Ｆ素電池
２１Ａ〜２１Ｆ負極端子
２２Ａ〜２２Ｆ周面
２３Ａ〜２３Ｆ正極端子
３０ａ〜３０ｇ、３１ｂ〜３１ｅ端子接続部
３１ａ、３１ｇ、３２ｂ〜３２ｆ延長部
３２ａ、３２ｇ、３３ｂ〜３３ｆ基板接続部
４１コネクタ
５７Ａ〜５７Ｆ、５８Ａ〜５８Ｆ、５９Ａ〜５９Ｆ、６０Ａ〜６０Ｆ、６１Ａ〜６１Ｆ周面被覆部（表面被覆部）
５０Ａ〜５０Ｆ、５１Ａ〜５１Ｆ、５２Ａ〜５２Ｆ、５３Ａ〜５３Ｆ、５４Ａ〜５４Ｆ溝部
５５Ａ〜５５Ｆ庇部（端部被覆部）
５６Ａ〜５６Ｆツメ部（端部被覆部）
６２Ａ〜６２Ｆ、６３Ａ〜６３Ｆ、６４Ａ〜６４Ｆスリット
７０Ａ、７０Ｂ射出空間 P ₁ , P ₂ board fixing part P ₃ board mounting part P ₄ lead plate guide part P ₅ board guide P ₆ positioning pin 1S to 6S storage space a1 to a7, b1 to b7 Surface area of unit cell 1 battery pack 2 core Pack 3 Lead member 3a to 3g Lead plate 4 Protection circuit board 5, 5a to 5c Battery holder 5T Upper surface of battery holder 5U Lower surface of battery holder 6 Cushion 7A Cavity (fixed mold)
7B Core (moving mold)
DESCRIPTION OF SYMBOLS 10 Exterior case 10A 1st case member 10B 2nd case member 11A Fitting hole 11B Engagement claw 20A-20F Cell 21A-21F Negative electrode terminal 22A-22F Peripheral surface 23A-23F Positive electrode terminal 30a-30g, 31b-31e Terminal connection Part 31a, 31g, 32b-32f Extension part 32a, 32g, 33b-33f Board connection part 41 Connector 57A-57F, 58A-58F, 59A-59F, 60A-60F, 61A-61F Peripheral surface covering part (surface covering part)
50A to 50F, 51A to 51F, 52A to 52F, 53A to 53F, 54A to 54F Groove 55A to 55F Gutter (end covering portion)
56A-56F Claw part (end covering part)
62A-62F, 63A-63F, 64A-64F Slit 70A, 70B Injection space

Claims

A long unit cell,
A battery holder having a storage space for storing the unit cell,
The battery holder is configured to cover a plurality of surface regions of the unit cells stored in the storage space alternately from different directions passing through the short direction of the unit cells along the longitudinal direction of the unit cells. And a pair of end cover portions that cover both ends of the unit cell in the longitudinal direction. The battery pack is formed by an integral member.

The battery pack according to claim 1, wherein the battery holder has a plurality of storage spaces arranged in parallel, and the plurality of unit cells are stored in the storage spaces.

When viewing the battery holder in plan view from one end in the longitudinal direction,
The battery pack according to claim 1, wherein the surface covering portions are arranged in an annular shape so as to surround the storage space.

The unit cell is cylindrical, and the short direction is a radial direction of the unit cell,
The battery pack according to claim 1, wherein the peripheral surface covering portion has a semicylindrical shape.

The battery pack according to any one of claims 1 to 4, wherein at least one of the pair of end portion covering portions is a claw portion having flexibility.

The battery according to claim 5, further comprising an outer case that covers the unit cell and the battery holder, wherein the claw portion is in contact with both an inner surface of the outer case and the unit cell. pack.

A circuit board electrically connected to the unit cell;
The battery pack according to any one of claims 1 to 6, wherein the battery holder includes a fixing portion of the circuit board.

The battery pack according to claim 1, wherein the battery holder is an injection molded product made of a resin material.

The battery pack according to claim 1, wherein the different directions are directions opposite to each other.

An arrangement step of placing the first mold and the second mold in contact with each other, and a battery holder by injecting molten resin into an injection space formed between the first mold and the second mold in contact with each other A battery holder manufacturing method having an injection molding step of molding,
In the first mold and the second mold, one is a groove having a length in one direction, and the other is a protrusion that can be fitted in the groove and the injection space along the one direction. It has plural each alternately,
In the molding step, a battery holder having a storage space surrounded by an annular resin member when viewed in plan from the one direction, using the injection space existing between the grooves and the protrusions. A method for manufacturing a battery holder, wherein the battery holder is formed integrally.

The groove has a U-shaped cross section in the groove width direction,
The method for manufacturing a battery holder according to claim 10, wherein the resin member includes a plurality of semi-cylindrical portions.

A storage step for storing the unit cell in the battery holder;
A coating step of coating the battery holder and the unit cell with an exterior body,
As the battery holder, using a battery holder manufactured by the method for manufacturing a battery holder according to claim 10 or 11,
In the storage step, the long unit cell is stored in the storage space along the first direction. A method of manufacturing a battery pack, comprising: