JP6585726B2 - Assembled battery - Google Patents

Assembled battery Download PDF

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JP6585726B2
JP6585726B2 JP2017543219A JP2017543219A JP6585726B2 JP 6585726 B2 JP6585726 B2 JP 6585726B2 JP 2017543219 A JP2017543219 A JP 2017543219A JP 2017543219 A JP2017543219 A JP 2017543219A JP 6585726 B2 JP6585726 B2 JP 6585726B2
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battery
secondary battery
spacer member
assembled battery
pair
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JPWO2017057207A1 (en
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和則 小島
和則 小島
青木　定之
定之 青木
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Hitachi Astemo Ltd
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Hitachi Automotive Systems Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/466—U-shaped, bag-shaped or folded
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)

Description

本発明は、複数の角形二次電池を備えた組電池に関する。   The present invention relates to an assembled battery including a plurality of prismatic secondary batteries.

例えば、電気自動車やハイブリッドカー等の車両には、複数の角形二次電池を備えた組電池が搭載されている。車両用の組電池の一例として、複数の角形電池セルを、セパレータを介して送風隙間を設ける状態で積層したものが知られている（下記特許文献１を参照）。特許文献１に記載された組電池のセパレータは、隣接する角形電池セルの対向面の間に配設してなる絶縁シートと、この絶縁シートの両側にあって、絶縁シートを挟着してなる一対の分割セパレータとを備えている。   For example, vehicles such as electric cars and hybrid cars are equipped with an assembled battery including a plurality of prismatic secondary batteries. As an example of an assembled battery for a vehicle, a battery in which a plurality of rectangular battery cells are stacked in a state where a ventilation gap is provided via a separator is known (see Patent Document 1 below). The separator of the assembled battery described in Patent Document 1 is formed by sandwiching an insulating sheet on both sides of this insulating sheet and an insulating sheet disposed between opposing surfaces of adjacent rectangular battery cells. A pair of split separators.

特許文献１に記載された分割セパレータは、角形電池セルの外周に沿う枠部を有し、この枠部の内側を開口して、この開口部において、絶縁シートの両面と角形電池セルの間に送風隙間を設けている。さらに、この分割セパレータは、送風隙間に気体を送風する送風開口を枠部に有している。特許文献１に記載された車両用の組電池は、この分割セパレータの送風開口から送風隙間に強制送風して角形電池セルを冷却し、又は加温するようにしている。   The divided separator described in Patent Document 1 has a frame portion that extends along the outer periphery of the rectangular battery cell, and opens the inside of the frame portion, and between the both sides of the insulating sheet and the rectangular battery cell in this opening portion. A ventilation gap is provided. Furthermore, this division | segmentation separator has the ventilation opening which ventilates gas in a ventilation gap in a frame part. The assembled battery for a vehicle described in Patent Document 1 cools or warms the prismatic battery cell by forcibly blowing air from the air opening of the divided separator to the air gap.

特開２０１０−４９８４２号公報JP 2010-49842 A

前記特許文献１の組電池は、大電流での充放電を繰り返すことで、組電池を構成する個々の角形電池セルが膨張と収縮を繰り返す。これにより、隣接する角形電池セルの対向面の間に配設された分割セパレータの枠部の横枠や支持ロッドに対して応力が作用し、横枠や支持ロッドに疲労破壊や塑性変形が生じる虞がある。   The assembled battery of Patent Document 1 is repeatedly charged and discharged with a large current, so that each rectangular battery cell constituting the assembled battery repeats expansion and contraction. As a result, stress acts on the horizontal frame and the support rod of the frame portion of the divided separator disposed between the opposing surfaces of the adjacent rectangular battery cells, and fatigue failure and plastic deformation occur in the horizontal frame and the support rod. There is a fear.

本発明は、前記課題に鑑みてなされたものであり、複数の扁平角形の二次電池を備えた組電池において、個々の二次電池に隣接して配置されるスペーサ部材の疲労破壊や塑性変形を抑制することを目的とする。   The present invention has been made in view of the above problems, and in an assembled battery including a plurality of flat rectangular secondary batteries, fatigue failure and plastic deformation of a spacer member arranged adjacent to each secondary battery. It aims at suppressing.

前記目的を達成すべく、本発明の組電池は、扁平角形の二次電池が厚さ方向にスペーサ部材と交互に積層された組電池であって、前記スペーサ部材は、前記二次電池の幅方向の一側と他側にそれぞれ配置され、前記幅方向に沿う前記二次電池の広側面の一部に対向する第１部分と、該第１部分に接続されて前記厚さ方向に沿う前記二次電池の狭側面の少なくとも一部に対向する第２部分と、を有することを特徴とする。   In order to achieve the above object, the assembled battery of the present invention is an assembled battery in which flat rectangular secondary batteries are alternately stacked with a spacer member in the thickness direction, and the spacer member has a width of the secondary battery. A first part disposed on one side and the other side of the direction and facing a part of a wide side surface of the secondary battery along the width direction, and connected to the first part and along the thickness direction And a second portion facing at least a part of the narrow side surface of the secondary battery.

本発明の組電池によれば、個々の二次電池が充放電に伴って膨張と収縮を繰り返しても、個々の二次電池に隣接して配置されるスペーサ部材の疲労破壊や塑性変形を抑制することができる。   According to the assembled battery of the present invention, even if each secondary battery repeatedly expands and contracts with charge and discharge, it suppresses fatigue failure and plastic deformation of the spacer member arranged adjacent to each secondary battery. can do.

本発明の実施形態１に係る組電池の外観斜視図。1 is an external perspective view of an assembled battery according to Embodiment 1 of the present invention. 図１に示す組電池の分解斜視図。The exploded perspective view of the assembled battery shown in FIG. 図２に示す二次電池の外観斜視図。FIG. 3 is an external perspective view of the secondary battery shown in FIG. 2. 図２に示すスペーサ部材の外観斜視図。The external appearance perspective view of the spacer member shown in FIG. 図１に示す組電池の拡大平面図。The enlarged plan view of the assembled battery shown in FIG. 本発明の実施形態２に係る組電池のスペーサ部材の外観斜視図。The external appearance perspective view of the spacer member of the assembled battery which concerns on Embodiment 2 of this invention. 本発明の実施形態２に係る組電池の拡大平面視図。The enlarged plan view of the assembled battery which concerns on Embodiment 2 of this invention. 本発明の実施形態３に係る組電池のスペーサ部材の外観斜視図。The external appearance perspective view of the spacer member of the assembled battery which concerns on Embodiment 3 of this invention. 本発明の実施形態３に係る組電池の拡大平面視図。The expanded plan view of the assembled battery which concerns on Embodiment 3 of this invention. 本発明の実施形態４に係る組電池の分解斜視図。The disassembled perspective view of the assembled battery which concerns on Embodiment 4 of this invention. 図１０に示すスペーサ部材とサイドプレートの係合状態を示す断面図。Sectional drawing which shows the engagement state of the spacer member shown in FIG. 10, and a side plate. 図１０に示すスペーサ部材の外観斜視図。FIG. 11 is an external perspective view of the spacer member shown in FIG. 10.

以下、本発明の組電池の実施形態について、図面を参照して詳細に説明する。   Hereinafter, an embodiment of an assembled battery of the present invention will be described in detail with reference to the drawings.

［実施形態１］
図１は、本発明の実施形態１に係る組電池１００の外観斜視図である。図２は、図１に示す組電池１００の分解斜視図である。本実施形態の組電池１００は、扁平角形の二次電池１が厚さ方向にスペーサ部材２と交互に配置された組電池である。以下の説明では、二次電池１の厚さ方向をＸ軸方向、二次電池１の幅方向をＹ軸方向、二次電池１の高さ方向をＺ軸方向とするＸＹＺ直交座標系を用いる場合がある。[Embodiment 1]
FIG. 1 is an external perspective view of an assembled battery 100 according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of the battery pack 100 shown in FIG. The assembled battery 100 according to the present embodiment is an assembled battery in which flat rectangular secondary batteries 1 are alternately arranged with spacer members 2 in the thickness direction. In the following description, an XYZ orthogonal coordinate system is used in which the thickness direction of the secondary battery 1 is the X-axis direction, the width direction of the secondary battery 1 is the Y-axis direction, and the height direction of the secondary battery 1 is the Z-axis direction. There is a case.

本実施形態の組電池１００は、複数の二次電池１と、複数のスペーサ部材２と、一対の端部スペーサ部材３と、一対のエンドプレート４と、一対のサイドプレート５とを備えている。詳細は後述するが、本実施形態の組電池１００は、一対のスペーサ部材２が二次電池１の幅方向（Ｙ軸方向）の一側と他側に分離して配置され、それぞれ、二次電池１の広側面１０ｗの一部に対向する第１部分２１と、第１部分２１から延出して二次電池１の狭側面１０ｎの少なくとも一部に対向する第２部分２２とを有することを特徴としている。   The assembled battery 100 of this embodiment includes a plurality of secondary batteries 1, a plurality of spacer members 2, a pair of end spacer members 3, a pair of end plates 4, and a pair of side plates 5. . Although details will be described later, in the assembled battery 100 of the present embodiment, the pair of spacer members 2 are arranged separately on one side and the other side of the width direction (Y-axis direction) of the secondary battery 1, respectively. A first portion 21 facing a part of the wide side surface 10w of the battery 1 and a second portion 22 extending from the first portion 21 and facing at least a portion of the narrow side surface 10n of the secondary battery 1; It is a feature.

二次電池１は、扁平角形の概ね直方体形状を有し、上面の幅方向の一端と他端に正極外部端子１１と負極外部端子１２とを有している。二次電池１は、その厚さ方向（Ｘ軸方向）にスペーサ部材２と交互に配置され、スペーサ部材２を介在させて積層されている。複数の二次電池１は、隣接する２つの二次電池１，１のうち、一方の二次電池１の正極外部端子１１と、他方の二次電池１の負極外部端子１２とが、二次電池１の積層方向（Ｘ軸方向）に隣り合うように、交互に１８０°反転させて積層され、図示を省略するバスバーによって直列に接続される。   The secondary battery 1 has a substantially rectangular parallelepiped shape with a flat rectangular shape, and has a positive external terminal 11 and a negative external terminal 12 at one end and the other end in the width direction of the upper surface. The secondary batteries 1 are alternately arranged with the spacer members 2 in the thickness direction (X-axis direction), and are stacked with the spacer members 2 interposed therebetween. Among the two secondary batteries 1 and 1 adjacent to each other, the secondary battery 1 includes a positive external terminal 11 of one secondary battery 1 and a negative external terminal 12 of the other secondary battery 1. The batteries 1 are alternately inverted by 180 ° so as to be adjacent to each other in the stacking direction (X-axis direction), and are connected in series by a bus bar (not shown).

図３は、図１及び図２に示す二次電池１の外観斜視図である。二次電池１は、例えばアルミニウム又はアルミニウム合金製の電池容器１０を備え、幅方向を長辺とする概ね長方形の上面１０ｔ及び底面１０ｂと、幅方向に沿う最大面積の広側面１０ｗと、厚さ方向に沿う比較的面積の小さい狭側面１０ｎとを有している。組電池１００の組立時に、複数の二次電池１は、隣り合う二次電池１の互いの広側面１０ｗ同士がスペーサ部材２を介して対向するように積層して配置される。   FIG. 3 is an external perspective view of the secondary battery 1 shown in FIGS. 1 and 2. The secondary battery 1 includes a battery container 10 made of, for example, aluminum or an aluminum alloy, and includes a generally rectangular upper surface 10t and a bottom surface 10b having a long side in the width direction, a wide side surface 10w having a maximum area along the width direction, and a thickness. It has a narrow side surface 10n with a relatively small area along the direction. When the assembled battery 100 is assembled, the plurality of secondary batteries 1 are stacked so that the wide side surfaces 10w of the adjacent secondary batteries 1 face each other with the spacer member 2 therebetween.

電池容器１０は、有底角筒状の電池缶１３と矩形平板状の電池蓋１４とを有し、例えばレーザ溶接によって電池蓋１４が接合されて電池缶１３の上部開口が封止されている。図示は省略するが、電池容器１０の内部には、例えば、長尺帯状の正極電極及び負極電極を長尺帯状のセパレータを介在させて捲回した捲回体と、該捲回体の各電極と各外部端子１１，１２とを接続する一対の集電板と、一対の集電板を電池蓋１４に対して固定する絶縁部材と、捲回体を覆う絶縁シートと、電解液とが収容されている。   The battery container 10 includes a bottomed rectangular tube-shaped battery can 13 and a rectangular flat battery cover 14. The battery cover 14 is joined by, for example, laser welding, and the upper opening of the battery can 13 is sealed. . Although illustration is omitted, inside the battery container 10, for example, a wound body obtained by winding a long strip-shaped positive electrode and a negative electrode with a long strip separator interposed therebetween, and each electrode of the wound body And a pair of current collecting plates for connecting the external terminals 11 and 12, an insulating member for fixing the pair of current collecting plates to the battery lid 14, an insulating sheet for covering the wound body, and an electrolytic solution Has been.

電池蓋１４の長手方向（Ｙ軸方向）すなわち二次電池１の幅方向の一端と他端には、例えばアルミニウム又はアルミニウム合金製の正極外部端子１１と、例えば銅又は銅合金製の負極外部端子１２とが設けられている。正極外部端子１１と負極外部端子１２は、それぞれ電池蓋１４を貫通して電池容器１０の内部の正極集電板と負極集電板に接続されることで、それぞれ捲回体を構成する正極電極と負極電極に接続されている。各外部端子１１，１２と電池蓋１４との間には、絶縁性を有する樹脂製のガスケット１５が配置されている。ガスケット１５は、各外部端子１１，１２と電池蓋１４との間を絶縁するとともに、電池蓋１４に設けられた貫通孔を封止している。   At one end and the other end of the battery lid 14 in the longitudinal direction (Y-axis direction), that is, in the width direction of the secondary battery 1, for example, a positive external terminal 11 made of aluminum or aluminum alloy and a negative external terminal made of copper or copper alloy, for example. 12 are provided. The positive electrode external terminal 11 and the negative electrode external terminal 12 pass through the battery lid 14 and are connected to the positive electrode current collector plate and the negative electrode current collector plate inside the battery container 10, respectively. And connected to the negative electrode. Between each external terminal 11 and 12 and the battery cover 14, the resin gasket 15 which has insulation is arrange | positioned. The gasket 15 insulates between the external terminals 11 and 12 and the battery lid 14 and seals a through hole provided in the battery lid 14.

電池蓋１４は、長手方向の中間部にガス排出弁１６と注液孔１７とを有している。ガス排出弁１６は、例えば電池蓋１４を部分的に薄肉化することによって形成され、何らかの異常によって電池容器１０の内圧が設定圧力を超えて上昇したときに開裂してガスを排出し、電池容器１０の内圧を低減させる。注液孔１７は、電池蓋１４に穿設された貫通孔であり、電池容器１０の内部に電解液を注入するのに用いられ、電解液の注入後に、例えばレーザ溶接によって注液栓１８が接合されて封止される。   The battery lid 14 has a gas discharge valve 16 and a liquid injection hole 17 at an intermediate portion in the longitudinal direction. The gas discharge valve 16 is formed, for example, by partially thinning the battery lid 14, and is cleaved to discharge gas when the internal pressure of the battery container 10 rises above a set pressure due to some abnormality, thereby discharging the battery container. The internal pressure of 10 is reduced. The liquid injection hole 17 is a through hole formed in the battery lid 14 and is used for injecting the electrolytic solution into the battery container 10. After the injection of the electrolytic solution, the liquid injection plug 18 is formed by laser welding, for example. Joined and sealed.

以上の構成により、二次電池１は、外部から正極外部端子１１及び負極外部端子１２を介して供給された電力を電池容器１０内部の捲回体に蓄え、又は、捲回体に蓄えた電力を正極外部端子１１及び負極外部端子１２を介して外部へ供給することができる。   With the above configuration, the secondary battery 1 stores the power supplied from the outside via the positive electrode external terminal 11 and the negative electrode external terminal 12 in the wound body inside the battery container 10, or the power stored in the wound body Can be supplied to the outside via the positive electrode external terminal 11 and the negative electrode external terminal 12.

図４は、図２に示すスペーサ部材２を示す外観斜視図である。図５は、図１に示す組電池１００の拡大平面図である。   FIG. 4 is an external perspective view showing the spacer member 2 shown in FIG. FIG. 5 is an enlarged plan view of the battery pack 100 shown in FIG.

スペーサ部材２は、例えば絶縁性を有する樹脂によって製作され、前述のように二次電池１の幅方向の一側と他側に分離して配置される。スペーサ部材２は、それぞれ、二次電池１の広側面１０ｗの一部に対向する第１部分２１と、該第１部分２１から延出して二次電池１の狭側面１０ｎの少なくとも一部に対向する第２部分２２とを有している。   The spacer member 2 is made of, for example, an insulating resin, and is arranged separately on one side and the other side in the width direction of the secondary battery 1 as described above. Each of the spacer members 2 faces a part of the wide side surface 10 w of the secondary battery 1, and faces at least a part of the narrow side surface 10 n of the secondary battery 1 extending from the first part 21. And a second portion 22 to be

スペーサ部材２の第１部分２１は、二次電池１の幅方向（Ｙ軸方向）及び高さ方向（Ｚ軸方向）に延在して、積層方向（Ｘ軸方向）に隣接する２つの二次電池１の広側面１０ｗの間に配置され、両方の広側面１０ｗに当接する薄い板状の部分である。スペーサ部材２の第１部分２１は、例えば、積層方向に隣接する２つの二次電池１の間隔を保持して絶縁性を確保する。   The first portion 21 of the spacer member 2 extends in the width direction (Y-axis direction) and the height direction (Z-axis direction) of the secondary battery 1 and is adjacent to the two stacking directions (X-axis direction). It is a thin plate-like portion that is disposed between the wide side surfaces 10w of the secondary battery 1 and contacts both the wide side surfaces 10w. For example, the first portion 21 of the spacer member 2 maintains an interval between two secondary batteries 1 adjacent in the stacking direction to ensure insulation.

スペーサ部材２の第１部分２１は、例えば、二次電池１の幅方向に沿う幅寸法Ｗ１が二次電池１の高さ方向に沿う高さ寸法Ｈ１よりも小さく、二次電池１の高さ方向を長手方向とする細長い長方形の板状に形成することができる。スペーサ部材２の第１部分２１の高さ寸法Ｈ１は、二次電池１の電池容器１０の高さ寸法Ｈと概ね等しくすることができる。スペーサ部材２の第１部分２１の厚さ寸法Ｔ１は、強度確保と組電池１００の小型化の観点から、０．１ｍｍ以上、３．０ｍｍ以下であることが好ましい。   The first portion 21 of the spacer member 2 has, for example, a width dimension W1 along the width direction of the secondary battery 1 smaller than a height dimension H1 along the height direction of the secondary battery 1, and the height of the secondary battery 1. It can be formed in an elongated rectangular plate shape whose direction is the longitudinal direction. The height dimension H <b> 1 of the first portion 21 of the spacer member 2 can be substantially equal to the height dimension H of the battery container 10 of the secondary battery 1. The thickness dimension T1 of the first portion 21 of the spacer member 2 is preferably 0.1 mm or more and 3.0 mm or less from the viewpoint of ensuring strength and reducing the size of the assembled battery 100.

スペーサ部材２の第１部分２１の幅寸法Ｗ１は、第２部分２２から延在する第１部分２１を、二次電池１の広側面１０ｗの一部に対向させることができる寸法であれば、特に限定されない。具体的には、二次電池１の広側面１０ｗと狭側面１０ｎとの間の角部に曲面状のＲ部１０ｒを有する場合、第１部分２１の幅寸法Ｗ１は、第２部分２２から延在する第１部分２１の幅方向の端部２１ａが、Ｒ部１０ｒと広側面１０ｗとの間の境界を超えて、広側面１０ｗに対向する位置に達するように設定することができる。また、二次電池１の広側面１０ｗと狭側面１０ｎとの間の角部にＲ部１０ｒを有しない場合、第１部分２１の幅寸法Ｗ１は、電池缶１３の肉厚よりも大きければよい。なお、第１部分２１の幅寸法Ｗ１は、組電池１００の組立時や二次電池１の充放電時に作用する圧縮力に耐え得る寸法に設定する必要がある。   If the width dimension W1 of the first part 21 of the spacer member 2 is a dimension that allows the first part 21 extending from the second part 22 to be opposed to a part of the wide side surface 10w of the secondary battery 1, There is no particular limitation. Specifically, when the curved portion R 10r is provided at the corner between the wide side 10w and the narrow side 10n of the secondary battery 1, the width dimension W1 of the first portion 21 extends from the second portion 22. The end portion 21a in the width direction of the existing first portion 21 can be set so as to reach the position facing the wide side surface 10w beyond the boundary between the R portion 10r and the wide side surface 10w. Further, in the case where the R portion 10r is not provided at the corner between the wide side surface 10w and the narrow side surface 10n of the secondary battery 1, the width dimension W1 of the first portion 21 only needs to be larger than the wall thickness of the battery can 13. . In addition, the width dimension W1 of the first portion 21 needs to be set to a dimension that can withstand the compressive force that acts when the assembled battery 100 is assembled or when the secondary battery 1 is charged or discharged.

スペーサ部材２の第１部分２１の幅寸法Ｗ１は、組電池１００の組立時にスペーサ部材２の第１部分２１によって二次電池１の電池容器１０を圧縮して寸法を均一化する観点から、１０ｍｍ以上であることが好ましい。また、二次電池１の幅方向の一側と他側に配置された一対のスペーサ部材２の第１部分２１の寸法及び形状は、二次電池１を均一に保持する観点から、同一であることが好ましい。また、二次電池１の幅方向の一側と他側に配置された一対のスペーサ部材２は、互いに分離されていれば、第１部分２１同士が接していてもよいが、第１部分２１に作用する応力を低減する観点から、第１部分２１同士の間に間隔を有することが好ましい。   The width dimension W1 of the first portion 21 of the spacer member 2 is 10 mm from the viewpoint of compressing the battery container 10 of the secondary battery 1 by the first portion 21 of the spacer member 2 when the assembled battery 100 is assembled and making the dimensions uniform. The above is preferable. Moreover, the dimension and shape of the 1st part 21 of a pair of spacer member 2 arrange | positioned at the width direction one side and the other side of the secondary battery 1 are the same from a viewpoint of hold | maintaining the secondary battery 1 uniformly. It is preferable. Moreover, as long as the pair of spacer members 2 arranged on one side and the other side of the secondary battery 1 are separated from each other, the first portions 21 may be in contact with each other. From the viewpoint of reducing the stress acting on the first portion 21, it is preferable to have an interval between the first portions 21.

したがって、スペーサ部材２の第１部分２１の幅寸法Ｗ１は、電池容器１０の幅寸法Ｗの１／２以下にすることができる。なお、スペーサ部材２の第１部分２１は、二次電池１の高さ方向に所定の間隔をあけて複数の第１部分２１が配置された櫛歯状の構成を有してもよい。この場合、二次電池１の幅方向の一側と他側に配置された一対のスペーサ部材２のうち、一方の櫛歯状の第１部分２１と他方の櫛歯状の第１部分２１とを噛合させ、互いの第１部分２１が高さ方向に交互に配置されるようにしてもよい。この場合、スペーサ部材２の第１部分２１の幅寸法Ｗ１は、電池容器１０の幅寸法Ｗ以下にすることができる。   Therefore, the width dimension W1 of the first portion 21 of the spacer member 2 can be set to ½ or less of the width dimension W of the battery container 10. The first portion 21 of the spacer member 2 may have a comb-like configuration in which a plurality of first portions 21 are arranged at a predetermined interval in the height direction of the secondary battery 1. In this case, of the pair of spacer members 2 arranged on one side and the other side in the width direction of the secondary battery 1, one comb-shaped first portion 21 and the other comb-shaped first portion 21 The first portions 21 may be alternately arranged in the height direction. In this case, the width dimension W <b> 1 of the first portion 21 of the spacer member 2 can be made equal to or less than the width dimension W of the battery container 10.

スペーサ部材２の第２部分２２は、二次電池１の厚さ方向（Ｘ軸方向）及び高さ方向（Ｚ軸方向）に延在する薄い板状の部分であり、電池容器１０とサイドプレート５との間に配置され、これらの間を絶縁する。本実施形態において、スペーサ部材２の第２部分２２は、積層方向（Ｘ軸方向）に隣接する２つの二次電池１の狭側面１０ｎに対向している。また、本実施形態において、スペーサ部材２の第２部分２２は、積層方向に隣接する２つの二次電池１のうち、一方の二次電池１の狭側面１０ｎに対向する面積と、他方の二次電池１の狭側面１０ｎに対向する面積とが概ね等しくなっている。   The second portion 22 of the spacer member 2 is a thin plate-like portion extending in the thickness direction (X-axis direction) and the height direction (Z-axis direction) of the secondary battery 1, and the battery container 10 and the side plate. 5 and is insulated between them. In the present embodiment, the second portion 22 of the spacer member 2 faces the narrow side surface 10n of the two secondary batteries 1 adjacent to each other in the stacking direction (X-axis direction). In the present embodiment, the second portion 22 of the spacer member 2 includes an area facing the narrow side surface 10n of one secondary battery 1 and the other two of the two secondary batteries 1 adjacent in the stacking direction. The area facing the narrow side surface 10n of the secondary battery 1 is substantially equal.

換言すると、スペーサ部材２の第２部分２２は、第１部分２１の幅方向（Ｙ軸方向）の一端から二次電池１の積層方向（Ｘ軸方向）の両側に向けて延出し、積層方向に隣接する２つの二次電池１のそれぞれの狭側面１０ｎの概ね１／２ずつに対向している。すなわち、スペーサ部材２は、二次電池１の厚さ方向における第２部分２２の中央部から、二次電池１の幅方向に第１部分２１が延出している。   In other words, the second portion 22 of the spacer member 2 extends from one end in the width direction (Y-axis direction) of the first portion 21 toward both sides in the stacking direction (X-axis direction) of the secondary battery 1 and is stacked in the stacking direction. Is opposed to approximately half of each narrow side surface 10n of the two secondary batteries 1 adjacent to each other. That is, in the spacer member 2, the first portion 21 extends in the width direction of the secondary battery 1 from the center portion of the second portion 22 in the thickness direction of the secondary battery 1.

スペーサ部材２の第２部分２２は、例えば、二次電池１の厚さ方向に沿う幅寸法Ｗ２が二次電池１の高さ方向に沿う高さ寸法Ｈ２よりも小さく、二次電池１の高さ方向を長手方向とする細長い長方形の板状に形成することができる。スペーサ部材２の第２部分２２の高さ寸法Ｈ２は、二次電池１の電池容器１０の高さ寸法Ｈと概ね等しくすることができる。また、スペーサ部材２の第２部分２２の高さ寸法Ｈ２は、電池容器１０の高さ寸法Ｈよりも大きくして、電池容器１０の底面１０ｂと上面１０ｔに対向する部分を設け、第２部分２２によって電池容器１０を上下から保持することもできる。スペーサ部材２の第２部分２２の厚さ寸法Ｔ２は、第１部分２１の厚さ寸法Ｔ１よりも厚くすることができる。   The second portion 22 of the spacer member 2 has, for example, a width dimension W2 along the thickness direction of the secondary battery 1 smaller than a height dimension H2 along the height direction of the secondary battery 1, and the height of the secondary battery 1 is increased. It can be formed in the shape of an elongated rectangular plate whose longitudinal direction is the vertical direction. The height dimension H <b> 2 of the second portion 22 of the spacer member 2 can be substantially equal to the height dimension H of the battery container 10 of the secondary battery 1. In addition, the height dimension H2 of the second portion 22 of the spacer member 2 is larger than the height dimension H of the battery case 10, and a portion facing the bottom surface 10b and the top surface 10t of the battery case 10 is provided. The battery container 10 can also be held from above and below by 22. The thickness dimension T <b> 2 of the second portion 22 of the spacer member 2 can be made larger than the thickness dimension T <b> 1 of the first portion 21.

スペーサ部材２の第２部分２２の幅寸法Ｗ２は、第１部分２１から延在する第２部分２２を、二次電池１の狭側面１０ｎの一部に対向させることができる寸法であれば、特に限定されない。具体的には、二次電池１の広側面１０ｗと狭側面１０ｎとの間の角部に曲面状のＲ部１０ｒを有する場合、第２部分２２の幅寸法Ｗ２は、第１部分２１から延在する第２部分２２の幅方向の端部２２ａが、Ｒ部と狭側面１０ｎとの間の境界を超えて、狭側面１０ｎに対向する位置に達するように設定することができる。また、二次電池１の広側面１０ｗと狭側面１０ｎとの間の角部にＲ部１０ｒを有しない場合、第２部分２２の幅寸法Ｗ２は、電池缶１３の肉厚よりも大きければよい。なお、第２部分２２の幅寸法Ｗ２は、組電池１００の組立時や二次電池１の充放電時に作用する応力に耐え得る寸法に設定する必要がある。   If the width dimension W2 of the second portion 22 of the spacer member 2 is a dimension that allows the second portion 22 extending from the first portion 21 to face a part of the narrow side surface 10n of the secondary battery 1, There is no particular limitation. Specifically, when the curved portion R 10r is provided at the corner between the wide side surface 10w and the narrow side surface 10n of the secondary battery 1, the width dimension W2 of the second portion 22 extends from the first portion 21. The end portion 22a in the width direction of the existing second portion 22 can be set so as to reach the position facing the narrow side surface 10n beyond the boundary between the R portion and the narrow side surface 10n. In addition, when the R portion 10r is not provided at the corner portion between the wide side surface 10w and the narrow side surface 10n of the secondary battery 1, the width dimension W2 of the second portion 22 only needs to be larger than the thickness of the battery can 13. . Note that the width dimension W2 of the second portion 22 needs to be set to a dimension that can withstand the stress that acts when the assembled battery 100 is assembled or when the secondary battery 1 is charged and discharged.

スペーサ部材２の第２部分２２の幅寸法Ｗ２は、組電池１００の組立時にスペーサ部材２の第１部分２１によって二次電池１の電池容器１０を圧縮して寸法を均一化する観点から、二次電池１の積層方向に隣接するスペーサ部材２の第２部分２２同士の間に間隙を有する寸法に設定することが好ましい。したがって、スペーサ部材２の第２部分２２の幅寸法Ｗ２は、電池容器１０の厚さ寸法Ｔ以下にすることができる。なお、二次電池１の積層方向に隣接するスペーサ部材２の第２部分２２の端部２２ａ同士を、二次電池１の幅方向において重ね合せるラビリンス構造を採用する場合には、スペーサ部材２の第２部分２２の幅寸法Ｗ２は、電池容器１０の厚さ寸法Ｔよりも大きくなる。この場合にも、第２部分２２同士の間に二次電池１の積層方向の間隙を形成することが好ましい。   The width dimension W2 of the second portion 22 of the spacer member 2 is determined from the viewpoint of compressing the battery container 10 of the secondary battery 1 by the first portion 21 of the spacer member 2 when the assembled battery 100 is assembled, and making the dimensions uniform. It is preferable to set a dimension having a gap between the second portions 22 of the spacer members 2 adjacent to each other in the stacking direction of the secondary battery 1. Therefore, the width dimension W <b> 2 of the second portion 22 of the spacer member 2 can be made equal to or less than the thickness dimension T of the battery container 10. When the labyrinth structure in which the end portions 22a of the second portions 22 of the spacer member 2 adjacent to each other in the stacking direction of the secondary battery 1 are overlapped in the width direction of the secondary battery 1 is employed, The width dimension W <b> 2 of the second portion 22 is larger than the thickness dimension T of the battery container 10. Also in this case, it is preferable to form a gap in the stacking direction of the secondary battery 1 between the second portions 22.

図２に示すように、一対の端部スペーサ部材３は、スペーサ部材２を介在させて厚さ方向に積層された複数の二次電池１の積層方向の一端と他端に配置されている。端部スペーサ部材３は、スペーサ部材２と同様に、絶縁性を有する樹脂によって製作され、エンドプレート４と二次電池１の間に配置され、これらを絶縁している。端部スペーサ部材３は、後述する実施形態２の組電池に用いられるＬ字形のスペーサ部材２Ａ（図６参照）のように、二次電池１の幅方向の一端と他端で分離されていてもよいが、本実施形態では、二次電池１の幅方向の一端から他端まで一体に設けられた板状の端部スペーサ部材３を用いている。端部スペーサ部材３は、二次電池１の広側面１０ｗの概ね全体に対向する第１部分３１と、第１部分３１の幅方向の両端部から二次電池１の厚さ方向に延在して一対の狭側面１０ｎの概ね１／２ずつに対向する一対の第２部分３２とを有している。   As shown in FIG. 2, the pair of end spacer members 3 are disposed at one end and the other end of the plurality of secondary batteries 1 stacked in the thickness direction with the spacer member 2 interposed therebetween. Similarly to the spacer member 2, the end spacer member 3 is made of an insulating resin, and is disposed between the end plate 4 and the secondary battery 1 to insulate them. The end spacer member 3 is separated at one end and the other end in the width direction of the secondary battery 1, like an L-shaped spacer member 2 </ b> A (see FIG. 6) used in the assembled battery of Embodiment 2 described later. However, in this embodiment, the plate-like end spacer member 3 provided integrally from one end to the other end in the width direction of the secondary battery 1 is used. The end spacer member 3 extends in the thickness direction of the secondary battery 1 from the first portion 31 facing substantially the whole of the wide side surface 10 w of the secondary battery 1 and both ends in the width direction of the first portion 31. And a pair of second portions 32 that oppose each half of the pair of narrow side surfaces 10n.

一対のエンドプレート４は、例えばステンレス鋼等の金属材料によって製作された矩形の板状の部材であり、概ね二次電池１の広側面１０ｗと等しい平面形状及び平面寸法を有している。一対のエンドプレート４は、二次電池１の積層方向において、一対の端部スペーサ部材３のさらに外側に配置される。一対のエンドプレート４は、スペーサ部材２を介在させて積層されるとともに積層方向の両側に一対の端部スペーサ部材３が配置された複数の二次電池１を、積層方向の両側から挟持する。一対のエンドプレート４は、二次電池１の幅方向の両側にそれぞれ複数のボルト穴４１を有している。   The pair of end plates 4 are rectangular plate-shaped members made of, for example, a metal material such as stainless steel, and have a planar shape and a planar dimension substantially equal to the wide side surface 10 w of the secondary battery 1. The pair of end plates 4 are disposed further outside the pair of end spacer members 3 in the stacking direction of the secondary batteries 1. The pair of end plates 4 are stacked with the spacer member 2 interposed therebetween, and sandwich the plurality of secondary batteries 1 in which the pair of end spacer members 3 are disposed on both sides in the stacking direction from both sides in the stacking direction. The pair of end plates 4 have a plurality of bolt holes 41 on both sides in the width direction of the secondary battery 1.

一対のサイドプレート５は、例えばステンレス鋼等の金属材料によって製作され、二次電池１の積層方向に延在する帯板状の部材であり、短手方向の寸法が二次電池１の電池容器１０の高さ寸法Ｈと概ね等しくなっている。本実施形態において、サイドプレート５は、二次電池１の高さ方向における電池蓋１４側の端部が概ね直角に曲折され、電池容器１０の上面１０ｔに係合するようになっている。サイドプレート５の長手方向の両端部には、エンドプレート４のボルト穴４１に対応する位置に、ボルト６，７を挿通させる貫通孔５１が設けられている。   The pair of side plates 5 are manufactured by a metal material such as stainless steel, for example, and are strip-shaped members extending in the stacking direction of the secondary battery 1. The battery container of the secondary battery 1 has a short dimension. 10 is substantially equal to the height dimension H. In the present embodiment, the side plate 5 is configured such that the end portion on the battery lid 14 side in the height direction of the secondary battery 1 is bent at a substantially right angle and is engaged with the upper surface 10 t of the battery container 10. At both ends in the longitudinal direction of the side plate 5, through holes 51 through which the bolts 6 and 7 are inserted are provided at positions corresponding to the bolt holes 41 of the end plate 4.

本実施形態の組電池１００は、例えば、以下の手順によって組み立てることができる。まず、第１の二次電池１の幅方向の一側と他側に一対の第１のスペーサ部材２を配置する。そして、一対の第１のスペーサ部材２の第１部分２１を、第１の二次電池１の一方の広側面１０ｗに対向させ、一方の第１のスペーサ部材２の第２部分２２を、第１の二次電池１の一方の狭側面１０ｎに対向させ、他方の第１のスペーサ部材２の第２部分２２を、第１の二次電池１の他方の狭側面１０ｎに対向させる。   The assembled battery 100 of this embodiment can be assembled, for example, according to the following procedure. First, a pair of first spacer members 2 are arranged on one side and the other side in the width direction of the first secondary battery 1. Then, the first portion 21 of the pair of first spacer members 2 is opposed to one wide side surface 10w of the first secondary battery 1, and the second portion 22 of the first spacer member 2 is One secondary battery 1 is made to face one narrow side surface 10 n, and the other second spacer 22 of the first spacer member 2 is made to face the other narrow side surface 10 n of the first secondary battery 1.

次に、一対の第１のスペーサ部材２を配置した第１の二次電池１の一方の広側面１０ｗに、第２の二次電池１の一方の広側面１０ｗを対向させ、二次電池１の積層方向において第１の二次電池１の正極外部端子１１と第２の二次電池１の負極外部端子１２とが隣接するように積層して配置する。これにより、一対の第１のスペーサ部材２の第１部分２１が第１の二次電池１の一方の広側面１０ｗと第２の二次電池１の一方の広側面１０ｗとの間に配置される。また、一方の第１のスペーサ部材２の第２部分２２が第１及び第２の二次電池１の隣接する一方の狭側面１０ｎに対向し、他方の第１のスペーサ部材２の第２部分２２が第１及び第２の二次電池１の隣接する他方の狭側面１０ｎに対向する。   Next, the one wide side surface 10w of the second secondary battery 1 is opposed to the one wide side surface 10w of the first secondary battery 1 in which the pair of first spacer members 2 are arranged. Are stacked so that the positive electrode external terminal 11 of the first secondary battery 1 and the negative electrode external terminal 12 of the second secondary battery 1 are adjacent to each other in the stacking direction. Accordingly, the first portion 21 of the pair of first spacer members 2 is disposed between one wide side surface 10 w of the first secondary battery 1 and one wide side surface 10 w of the second secondary battery 1. The In addition, the second portion 22 of one first spacer member 2 faces one narrow side surface 10n adjacent to the first and second secondary batteries 1, and the second portion of the other first spacer member 2. 22 opposes the other narrow side surface 10n of the first and second secondary batteries 1 adjacent to each other.

次に、一対の第２のスペーサ部材２、第３の二次電池１、一対の第３のスペーサ部材２、及び、第４の二次電池１についても同様に、一対のスペーサ部材２を２つの二次電池１の間に介在させながら、二次電池１を厚さ方向に積層していく。そして、すべての二次電池１を一対のスペーサ部材２を介在させながら積層させた後、二次電池１の積層方向の両側に一対の端部スペーサ部材３を配置し、さらにその積層方向の両側に一対のエンドプレート４を配置し、一対のエンドプレート４に対して二次電池１の積層方向に圧縮力を加える。これにより、許容される寸法公差の範囲で厚さ寸法Ｔの大きい二次電池１の電池容器１０が圧縮され、一対のエンドプレート４の間隔が所定の間隔に規定される。   Next, the pair of spacer members 2 is similarly set to 2 for the pair of second spacer members 2, the third secondary battery 1, the pair of third spacer members 2, and the fourth secondary battery 1. The secondary battery 1 is stacked in the thickness direction while being interposed between the two secondary batteries 1. And after laminating | stacking all the secondary batteries 1 interposing a pair of spacer member 2, a pair of edge part spacer member 3 is arrange | positioned on the both sides of the lamination direction of the secondary battery 1, and also the both sides of the lamination direction A pair of end plates 4 is disposed on the end plate 4, and a compressive force is applied to the pair of end plates 4 in the stacking direction of the secondary battery 1. As a result, the battery container 10 of the secondary battery 1 having a large thickness dimension T within the allowable dimensional tolerance range is compressed, and the distance between the pair of end plates 4 is defined as a predetermined distance.

次に、積層された複数の二次電池１の幅方向の両側に一対のサイドプレート５を配置し、これらのサイドプレート５の貫通孔５１にボルト６，７を挿通させ、一対のエンドプレート４のボルト穴４１にボルト６，７をねじ込み、一対のエンドプレート４と一対のサイドプレート５とを締結して固定する。これにより、一対のサイドプレート５は、二次電池１の幅方向において互いに対向し、二次電池１の積層方向に延在し、それぞれ、複数のスペーサ部材２の第２部分２２に対向した状態になる。   Next, a pair of side plates 5 are arranged on both sides in the width direction of the plurality of stacked secondary batteries 1, and bolts 6 and 7 are inserted into the through holes 51 of these side plates 5, so that the pair of end plates 4. The bolts 6 and 7 are screwed into the bolt holes 41, and the pair of end plates 4 and the pair of side plates 5 are fastened and fixed. Accordingly, the pair of side plates 5 face each other in the width direction of the secondary battery 1, extend in the stacking direction of the secondary batteries 1, and face the second portions 22 of the plurality of spacer members 2, respectively. become.

また、一対のエンドプレート４は、二次電池１の積層方向において対向する。そして、一対の端部スペーサ部材３の間に積層されてスペーサ部材２と交互に配置され、スペーサ部材２の第１部分２１によって圧縮力が付与された複数の二次電池１が、一対のエンドプレート４によって挟持されて固縛された状態になる。以上により、図１に示す組電池１００が完成する。その後、図示は省略するが、バスバーによって複数の二次電池１を直列に接続し、その上に二次電池１の電圧を測定する電圧検出用基板を配置し、さらに電圧検出用基板をカバーで覆う。以上の構成により、組電池１００は、外部から供給された電力を複数の二次電池１に蓄え、又は、複数の二次電池１に蓄えられた電力を外部に供給することができる。   The pair of end plates 4 oppose each other in the stacking direction of the secondary battery 1. The plurality of secondary batteries 1 stacked between the pair of end spacer members 3 and alternately arranged with the spacer members 2 and applied with the compressive force by the first portions 21 of the spacer members 2 are paired with the end portions. It is sandwiched and secured by the plate 4. As a result, the assembled battery 100 shown in FIG. 1 is completed. Thereafter, although not shown, a plurality of secondary batteries 1 are connected in series by a bus bar, a voltage detection board for measuring the voltage of the secondary battery 1 is disposed thereon, and the voltage detection board is further covered with a cover. cover. With the above configuration, the assembled battery 100 can store the power supplied from the outside in the plurality of secondary batteries 1 or supply the power stored in the plurality of secondary batteries 1 to the outside.

以下、本実施形態の組電池１００の作用について説明する。   Hereinafter, the operation of the assembled battery 100 of the present embodiment will be described.

組電池１００は、例えば、電気自動車やハイブリッドカー等の車両に搭載され、大電流での充放電を繰り返すことで、個々の二次電池１が膨張と収縮を繰り返す。二次電池１の電池容器１０は、内部に扁平な捲回体が収容された扁平角形の概ね直方体形状を有し、二次電池１の充電時に厚さ方向に膨張する。二次電池１は、電池容器１０の広側面１０ｗの中央部の近傍における膨張量が相対的に多く、広側面１０ｗの角部の近傍における膨張量が相対的に少ない傾向がある。   The assembled battery 100 is mounted on a vehicle such as an electric vehicle or a hybrid car, for example, and the secondary battery 1 repeats expansion and contraction by repeatedly charging and discharging with a large current. The battery container 10 of the secondary battery 1 has a substantially rectangular parallelepiped shape in which a flat wound body is accommodated, and expands in the thickness direction when the secondary battery 1 is charged. The secondary battery 1 tends to have a relatively large expansion amount in the vicinity of the central portion of the wide side surface 10w of the battery container 10 and a relatively small expansion amount in the vicinity of the corner portion of the wide side surface 10w.

そのため、二次電池１は、充電時に電池容器１０が膨張することで、電池容器１０の高さ寸法Ｈは、幅方向中央部で相対的に小さく、幅方向両端部で相対的に大きくなる。また、電池容器１０の幅寸法Ｗは、高さ方向中央部で相対的に小さく、高さ方向両端部で相対的に大きくなる。二次電池１の電池容器１０は、充電時の膨張した状態から、放電時に元の扁平角形の形状に戻るように収縮する。   Therefore, in the secondary battery 1, when the battery container 10 expands during charging, the height dimension H of the battery container 10 is relatively small at the center portion in the width direction and relatively large at both end portions in the width direction. Moreover, the width dimension W of the battery container 10 is relatively small at the center in the height direction and relatively large at both ends in the height direction. The battery container 10 of the secondary battery 1 contracts from the expanded state during charging to return to the original flat rectangular shape during discharging.

前記特許文献１に記載の従来の組電池は、隣接する角形電池セルの対向面の間に配設された分割セパレータが、角形電池セルの幅方向の一端から他端まで延在する枠部の横枠や支持ロッドを有している。この場合、上記のような組電池の充放電時の角形電池セルの膨張と収縮に伴って、角形電池セルの対向面が横枠や支持ロッドに接し、横枠や支持ロッドに対して対向面に沿う方向の比較的大きな圧縮応力や引張応力が作用する。したがって、特許文献１に記載の従来の組電池では、分割セパレータの横枠や支持ロッドに疲労破壊や塑性変形が生じる虞がある。   In the conventional assembled battery described in Patent Document 1, a split separator disposed between opposing surfaces of adjacent rectangular battery cells has a frame portion extending from one end to the other end in the width direction of the rectangular battery cells. It has a horizontal frame and a support rod. In this case, with the expansion and contraction of the prismatic battery cell during charging / discharging of the assembled battery as described above, the opposing surface of the prismatic battery cell is in contact with the horizontal frame and the support rod, and the opposing surface to the horizontal frame and the support rod. A relatively large compressive stress and tensile stress in the direction along the direction act. Therefore, in the conventional assembled battery described in Patent Document 1, there is a risk that fatigue breakage or plastic deformation may occur in the horizontal frame or the support rod of the divided separator.

これに対し、本実施形態の組電池１００は、扁平角形の二次電池１が厚さ方向にスペーサ部材２と交互に積層され、スペーサ部材２は、二次電池１の幅方向の一側と他側にそれぞれ配置されている。そして、スペーサ部材２は、二次電池１の幅方向に沿う広側面１０ｗの一部に対向する第１部分２１と、該第１部分２１に接続されて二次電池１の厚さ方向に沿う狭側面１０ｎの少なくとも一部に対向する第２部分２２と、を有している。   On the other hand, in the assembled battery 100 of the present embodiment, the flat rectangular secondary battery 1 is alternately stacked with the spacer member 2 in the thickness direction, and the spacer member 2 has one side in the width direction of the secondary battery 1. Arranged on the other side. The spacer member 2 is connected to the first portion 21 facing a part of the wide side surface 10 w along the width direction of the secondary battery 1, and is connected to the first portion 21 along the thickness direction of the secondary battery 1. And a second portion 22 facing at least a part of the narrow side surface 10n.

このように、一対のスペーサ部材２が二次電池１の幅方向の一側と他側に分離して配置されることで、二次電池１が膨張して広側面１０ｗがスペーサ部材２の第１部分２１に接しても、第１部分２１に作用する広側面１０ｗに沿う方向の圧縮応力や引張応力を従来よりも低減することができる。したがって、本実施形態によれば、複数の扁平角形の二次電池１を備えた組電池１００において、個々の二次電池１に隣接して配置されるスペーサ部材２の疲労破壊や塑性変形を抑制することができる。   In this way, the pair of spacer members 2 are arranged separately on one side and the other side in the width direction of the secondary battery 1, so that the secondary battery 1 expands and the wide side surface 10 w is the first of the spacer member 2. Even in contact with the first portion 21, the compressive stress and tensile stress in the direction along the wide side surface 10w acting on the first portion 21 can be reduced as compared with the conventional case. Therefore, according to the present embodiment, in the assembled battery 100 including the plurality of flat rectangular secondary batteries 1, the fatigue fracture and plastic deformation of the spacer member 2 arranged adjacent to each secondary battery 1 are suppressed. can do.

より詳細には、本実施形態の組電池１００において、電池容器１０の広側面１０ｗに対向するスペーサ部材２の第１部分２１は、二次電池１の狭側面１０ｎに対向する第２部分２２から二次電池１の幅方向に延在している。しかし、電池容器１０の幅方向における第１部分２１の幅寸法Ｗ１は、電池容器１０の幅寸法Ｗよりも小さい。より具体的には、本実施形態の組電池１００において、スペーサ部材２の第１部分２１の幅寸法Ｗ１は、電池容器１０の幅寸法Ｗの１／２よりも小さい。また、電池容器１０の幅方向の一側と他側に配置された一対のスペーサ部材２の第１部分２１の間には、電池容器１０の幅方向に間隙が形成されている。   More specifically, in the assembled battery 100 of the present embodiment, the first portion 21 of the spacer member 2 that faces the wide side surface 10w of the battery container 10 starts from the second portion 22 that faces the narrow side surface 10n of the secondary battery 1. The secondary battery 1 extends in the width direction. However, the width dimension W <b> 1 of the first portion 21 in the width direction of the battery container 10 is smaller than the width dimension W of the battery container 10. More specifically, in the assembled battery 100 of the present embodiment, the width dimension W1 of the first portion 21 of the spacer member 2 is smaller than ½ of the width dimension W of the battery container 10. Further, a gap is formed in the width direction of the battery container 10 between the first portions 21 of the pair of spacer members 2 arranged on one side and the other side of the battery container 10 in the width direction.

これにより、スペーサ部材２の成型時にウェルドラインが形成されやすく、比較的脆くなりやすい電池容器１０の広側面１０ｗの幅方向の中央部に対向する位置まで、スペーサ部材２の第１部分２１を第２部分２２から延在させる必要がなくなる。したがって、スペーサ部材２の強度を向上させることができる。また、電池容器１０の膨張及び収縮にともなう変形量が比較的大きい広側面１０ｗの幅方向中央部に対向するように、一対のスペーサ部材２の第１部分２１の間に幅方向の間隙を形成することができる。これにより、スペーサ部材２の第１部分２１に作用する圧縮応力や引張応力をより効果的に低減することができる。したがって、本実施形態の組電池１００によれば、スペーサ部材２の疲労破壊や塑性変形をより効果的に抑制することができる。   As a result, a weld line is easily formed when the spacer member 2 is molded, and the first portion 21 of the spacer member 2 is moved to a position facing the central portion in the width direction of the wide side surface 10w of the battery container 10 that is likely to be relatively brittle. There is no need to extend from the two portions 22. Therefore, the strength of the spacer member 2 can be improved. In addition, a gap in the width direction is formed between the first portions 21 of the pair of spacer members 2 so as to face the center portion in the width direction of the wide side surface 10w that has a relatively large deformation amount due to the expansion and contraction of the battery case 10. can do. Thereby, the compressive stress and tensile stress which act on the 1st part 21 of the spacer member 2 can be reduced more effectively. Therefore, according to the assembled battery 100 of this embodiment, the fatigue failure and plastic deformation of the spacer member 2 can be more effectively suppressed.

さらに、本実施形態の組電池１００において、スペーサ部材２の第１部分２１の幅寸法Ｗ１は、組電池１００の組立時にスペーサ部材２の第１部分２１によって二次電池１の電池容器１０を圧縮して寸法を均一化することができる最小限の寸法に設定することができる。より具体的には、スペーサ部材２の第１部分２１の幅寸法Ｗ１は、電池容器１０の狭側面１０ｎと隣接する外部端子１１，１２の端部までの距離と同等程度の寸法、より具体的には、１０ｍｍ程度に設定することができる。   Furthermore, in the assembled battery 100 of the present embodiment, the width W1 of the first portion 21 of the spacer member 2 is such that the battery container 10 of the secondary battery 1 is compressed by the first portion 21 of the spacer member 2 when the assembled battery 100 is assembled. Thus, the dimension can be set to the minimum dimension that can be made uniform. More specifically, the width dimension W1 of the first portion 21 of the spacer member 2 is a dimension equivalent to the distance from the narrow side surface 10n of the battery case 10 to the ends of the external terminals 11 and 12 adjacent thereto, more specifically. Can be set to about 10 mm.

これにより、電池容器１０の膨張、収縮時の変形量が比較的小さい広側面１０ｗの幅方向両端部のみに対向するように、一対のスペーサ部材２の第１部分２１を配置することができる。したがって、本実施形態の組電池１００によれば、スペーサ部材２の第１部分２１に作用する応力をより効果的に低減し、スペーサ部材２の疲労破壊や塑性変形をより効果的に抑制することができる。   Thereby, the 1st part 21 of a pair of spacer member 2 can be arrange | positioned so that only the width direction both ends of the wide side surface 10w with a comparatively small deformation amount at the time of expansion | swelling and shrinkage | contraction of the battery container 10 may be opposed. Therefore, according to the assembled battery 100 of this embodiment, the stress which acts on the 1st part 21 of the spacer member 2 is reduced more effectively, and the fatigue fracture and plastic deformation of the spacer member 2 are suppressed more effectively. Can do.

また、本実施形態の組電池１００において、スペーサ部材２の第２部分２２は、積層方向に隣接する２つの二次電池１の狭側面１０ｎに対向している。そのため、組電池１００の組立ての際に、二次電池１の電池容器１０の広側面１０ｗに第１部分２１を当接させ、電池容器１０の狭側面１０ｎに第２部分２２当接させてスペーサ部材２を配置し、そのスペーサ部材２を介して別の二次電池１を積層することができる。したがって、本実施形態の組電池１００によれば、二次電池１の積層時の組立性を向上させ、生産性を向上させることができる。   Moreover, in the assembled battery 100 of this embodiment, the 2nd part 22 of the spacer member 2 has opposed the narrow side surface 10n of the two secondary batteries 1 adjacent to the lamination direction. Therefore, when the assembled battery 100 is assembled, the first portion 21 is brought into contact with the wide side surface 10w of the battery case 10 of the secondary battery 1 and the second portion 22 is brought into contact with the narrow side surface 10n of the battery case 10 to form a spacer. The member 2 is arranged, and another secondary battery 1 can be stacked via the spacer member 2. Therefore, according to the assembled battery 100 of this embodiment, the assemblability at the time of lamination | stacking of the secondary battery 1 can be improved, and productivity can be improved.

また、本実施形態の組電池１００において、スペーサ部材２の第２部分２２は、積層方向に隣接する２つの二次電池１のうち、一方の二次電池１の狭側面１０ｎに対向する面積と、他方の二次電池１の狭側面１０ｎに対向する面積とが等しい。そのため、スペーサ部材２を、二次電池１の積層方向に直交する面に対して対称な形状にすることができ、組電池１００の組立時にスペーサ部材２を配置する方向を意識する必要がなくなる。したがって、本実施形態の組電池１００によれば、組立性を向上させ、生産性を向上させることができる。   Further, in the assembled battery 100 of the present embodiment, the second portion 22 of the spacer member 2 has an area facing the narrow side surface 10n of one secondary battery 1 out of two secondary batteries 1 adjacent in the stacking direction. The area facing the narrow side surface 10n of the other secondary battery 1 is equal. Therefore, the spacer member 2 can be symmetric with respect to the plane orthogonal to the stacking direction of the secondary battery 1, and it is not necessary to be aware of the direction in which the spacer member 2 is arranged when the assembled battery 100 is assembled. Therefore, according to the assembled battery 100 of this embodiment, assemblability can be improved and productivity can be improved.

以上説明したように、本実施形態によれば、複数の扁平角形の二次電池１を備えた組電池１００において、スペーサ部材２の疲労破壊や塑性変形をより効果的に抑制するとともに、生産性を向上させることができる。   As described above, according to the present embodiment, in the assembled battery 100 including the plurality of flat rectangular secondary batteries 1, the fatigue failure and plastic deformation of the spacer member 2 are more effectively suppressed, and the productivity is increased. Can be improved.

［実施形態２］
以下、本発明の組電池の実施形態２について、図１から図３を援用し、図６及び図７を用いて説明する。図６及び図７は、実施形態１の組電池１００の図４及び図５に相当する実施形態２の組電池のスペーサ部材２Ａの斜視図及びその組電池の拡大平面図である。[Embodiment 2]
Hereinafter, Embodiment 2 of the assembled battery of the present invention will be described with reference to FIGS. 6 and 7 with reference to FIGS. 6 and 7 are a perspective view of the spacer member 2A of the assembled battery of the second embodiment corresponding to FIGS. 4 and 5 of the assembled battery 100 of the first embodiment, and an enlarged plan view of the assembled battery.

本実施形態の組電池は、スペーサ部材２Ａの第２部分２２が、積層方向に隣接する２つの二次電池１のうち、一方の二次電池１の狭側面１０ｎのみに対向する点で、前述の実施形態１の組電池１００と異なっている。本実施形態の組電池のその他の点は、前述の実施形態１の組電池１００と同一であるので、同一の部分には同一の符号を付して説明を省略する。   The assembled battery of this embodiment is the point that the second portion 22 of the spacer member 2A faces only the narrow side surface 10n of one of the two secondary batteries 1 adjacent in the stacking direction. This is different from the assembled battery 100 of the first embodiment. Since the other points of the assembled battery of the present embodiment are the same as those of the assembled battery 100 of the above-described first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

本実施形態の組電池は、組立時に、例えば、一の二次電池１の幅方向の一側と他側に一対のスペーサ部材２Ａを配置し、スペーサ部材２Ａの第１部分２１を電池容器１０の一方の広側面１０ｗに対向させ、一対のスペーサ部材２Ａの第２部分２２を電池容器１０の一対に狭側面１０ｎに対向させる。これを各二次電池１に対して行った後、各一対のスペーサ部材２Ａを組み付けた各二次電池１を積層させることで、スペーサ部材２Ａを介して複数の二次電池１を積層させることができる。   In the assembled battery of the present embodiment, at the time of assembly, for example, a pair of spacer members 2A are arranged on one side and the other side in the width direction of one secondary battery 1, and the first portion 21 of the spacer member 2A is placed in the battery container 10. The second portion 22 of the pair of spacer members 2A is opposed to the pair of battery containers 10 and the narrow side surface 10n. After this is performed on each secondary battery 1, a plurality of secondary batteries 1 are stacked via the spacer member 2A by stacking each secondary battery 1 assembled with each pair of spacer members 2A. Can do.

したがって、本実施形態の組電池によれば、組立性を向上させ、生産性を向上させることができる。さらに、スペーサ部材２Ａを断面形状がＬ字形の単純な形状にして、スペーサ部材２Ａの製作を容易にすることができる。なお、二次電池１の幅方向の一側と他側に配置された一対のスペーサ部材２Ａは、必ずしも同一の形状及び左右対称の配置にする必要はなく、異なる形状又は左右非対称の配置にしてもよい。   Therefore, according to the assembled battery of this embodiment, assemblability can be improved and productivity can be improved. Furthermore, it is possible to make the spacer member 2A simple by making the spacer member 2A have a simple L-shaped cross section. The pair of spacer members 2A arranged on one side and the other side in the width direction of the secondary battery 1 do not necessarily have the same shape and left-right symmetrical arrangement, but have different shapes or left-right asymmetric arrangement. Also good.

［実施形態３］
以下、本発明の組電池の実施形態３について、図１から図３を援用し、図８及び図９を用いて説明する。図８及び図９は、実施形態１の組電池１００の図４及び図５に相当する実施形態３の組電池のスペーサ部材２Ｂの斜視図及びその組電池の拡大平面図である。[Embodiment 3]
Hereinafter, Embodiment 3 of the assembled battery of the present invention will be described with reference to FIGS. 8 and 9 with reference to FIGS. 8 and 9 are a perspective view of the assembled battery 100 of the first embodiment and a perspective view of the spacer member 2B of the assembled battery of the third embodiment corresponding to FIGS. 4 and 5, and an enlarged plan view of the assembled battery.

本実施形態の組電池は、スペーサ部材２Ｂの第２部分２２が、積層方向に隣接する２つの二次電池１のうち、一方の二次電池１の狭側面１０ｎに対向する面積と、他方の二次電池１の狭側面１０ｎに対向する面積とが異なる点で、前述の実施形態１の組電池１００と異なっている。本実施形態の組電池のその他の点は、前述の実施形態１の組電池１００と同一であるので、同一の部分には同一の符号を付して説明を省略する。   In the assembled battery of this embodiment, the second portion 22 of the spacer member 2B has an area facing the narrow side surface 10n of one of the two secondary batteries 1 adjacent to each other in the stacking direction, and the other part. The secondary battery 1 is different from the assembled battery 100 of the first embodiment in that the area facing the narrow side surface 10n of the secondary battery 1 is different. Since the other points of the assembled battery of the present embodiment are the same as those of the assembled battery 100 of the above-described first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

本実施形態の組電池は、組立時に、例えば、一の二次電池１の幅方向の一側と他側に一対のスペーサ部材２Ｂを配置し、一対のスペーサ部材２Ｂの第１部分２１を電池容器１０の一方の広側面１０ｗに対向させ、一対のスペーサ部材２Ｂの第２部分２２の面積の大きい部分を電池容器１０の一対の狭側面１０ｎに対向させる。これにより、一の二次電池１に対して一対のスペーサ部材２Ｂを安定して配置することができる。そして、一対のスペーサ部材２Ｂの第２部分２２の面積の小さい部分を、他の二次電池１の狭側面１０ｎに対向させ、一対のスペーサ部材２Ｂの第１部分２１を２つの二次電池１の間に配置する。   In the assembled battery of this embodiment, at the time of assembly, for example, a pair of spacer members 2B are arranged on one side and the other side in the width direction of one secondary battery 1, and the first portion 21 of the pair of spacer members 2B is connected to the battery. The large side portion of the second portion 22 of the pair of spacer members 2 </ b> B is opposed to the pair of narrow side surfaces 10 n of the battery container 10. Thereby, a pair of spacer member 2B can be stably arrange | positioned with respect to the one secondary battery 1. FIG. And the part with a small area of the 2nd part 22 of a pair of spacer member 2B is made to oppose the narrow side surface 10n of the other secondary battery 1, and the 1st part 21 of a pair of spacer member 2B is made into the two secondary batteries 1. Place between.

このとき、一の二次電池１に積層させる他の二次電池１の狭側面１０ｎに対向するスペーサ部材２Ｂの第２部分２２の面積が、一の二次電池１の狭側面１０ｎに対向するスペーサ部材２Ｂの第２部分２２の面積よりも小さい。これにより、スペーサ部材２Ｂを介して一の二次電池１に他の二次電池１を容易に積層させることができる。したがって、本実施形態の組電池によれば、組立性を向上させ、生産性を向上させることができる。   At this time, the area of the second portion 22 of the spacer member 2B facing the narrow side surface 10n of the other secondary battery 1 stacked on the one secondary battery 1 faces the narrow side surface 10n of the one secondary battery 1. It is smaller than the area of the second portion 22 of the spacer member 2B. Thereby, the other secondary battery 1 can be easily laminated on the one secondary battery 1 via the spacer member 2B. Therefore, according to the assembled battery of this embodiment, assemblability can be improved and productivity can be improved.

［実施形態４］
以下、本発明の組電池の実施形態４について、図１を援用し、図１０から図１２を用いて説明する。図１０は、実施形態１の組電池１００の図２に相当する実施形態４の組電池１００Ａの分解斜視図である。図１１は、図１０に示す一つのスペーサ部材２Ｃの断面図である。図１２は、図１０に示す一対のスペーサ部材２Ｃの斜視図である。[Embodiment 4]
Hereinafter, Embodiment 4 of the assembled battery of the present invention will be described with reference to FIGS. 10 to 12 with reference to FIG. FIG. 10 is an exploded perspective view of the assembled battery 100A of the fourth embodiment corresponding to FIG. 2 of the assembled battery 100 of the first embodiment. FIG. 11 is a cross-sectional view of one spacer member 2C shown in FIG. FIG. 12 is a perspective view of the pair of spacer members 2C shown in FIG.

本実施形態の組電池１００Ａは、主に、スペーサ部材２Ｃの第２部分２２が、二次電池１の積層方向に延在するサイドプレート５の一対の端縁５ａ，５ｂのうち、少なくとも一方の端縁を係合させる係合部２３，２４を有している点で、前述の実施形態１で説明した組電池１００と異なっている。本実施形態の組電池１００Ａのその他の点は、前述の実施形態１の組電池１００と同様であるため、同一の部分には同一の符号を付して説明を省略する。   The assembled battery 100A according to the present embodiment mainly includes at least one of the pair of end edges 5a and 5b of the side plate 5 in which the second portion 22 of the spacer member 2C extends in the stacking direction of the secondary battery 1. The battery pack is different from the assembled battery 100 described in the first embodiment in that the engaging portions 23 and 24 that engage the end edges are provided. Since the other points of the assembled battery 100A of the present embodiment are the same as those of the assembled battery 100 of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

本実施形態の組電池１００Ａは、実施形態１の組電池１００と同様に、複数のスペーサ部材２Ｃの第２部分２２に対向するサイドプレート５を備えている。サイドプレート５は
、二次電池１の積層方向に延在する一対の端縁５ａ，５ｂを有している。サイドプレート５の一対の端縁５ａ，５ｂのうち、二次電池１の高さ方向の上方側の端縁５ａは、二次電池１の幅方向に向けて概ね９０°の角度で折り曲げられ、二次電池１の幅方向の中央側を向いている。サイドプレート５は、二次電池１の幅方向内側を向く上方側の端縁５ａの曲折部から二次電池１の高さ方向に沿って下方に延在し、二次電池１の高さ方向の下方側の端縁５ｂは、まっすぐに下方を向いている。Similar to the assembled battery 100 of the first embodiment, the assembled battery 100A of the present embodiment includes the side plate 5 that faces the second portions 22 of the plurality of spacer members 2C. The side plate 5 has a pair of end edges 5 a and 5 b extending in the stacking direction of the secondary battery 1. Of the pair of edges 5a, 5b of the side plate 5, the edge 5a on the upper side in the height direction of the secondary battery 1 is bent at an angle of approximately 90 ° toward the width direction of the secondary battery 1, It faces the center side in the width direction of the secondary battery 1. The side plate 5 extends downward along the height direction of the secondary battery 1 from the bent portion of the upper edge 5 a facing the inner side in the width direction of the secondary battery 1, and the height direction of the secondary battery 1. The edge 5b on the lower side of the straight line faces downward.

スペーサ部材２Ｃの第２部分２２は、二次電池１の積層方向に延在するサイドプレート５の一対の端縁５ａ，５ｂのうち、上方側の端縁５ａを係合させる第１の係合部２３と、下方側の端縁５ｂを係合させる第２の係合部２４とを有している。なお、スペーサ部材２Ｃの第２部分２２は、第１の係合部２３と第２の係合部２４のうち、少なくとも一方を有していればよい。   The second portion 22 of the spacer member 2 </ b> C is a first engagement that engages the upper edge 5 a among the pair of edges 5 a and 5 b of the side plate 5 extending in the stacking direction of the secondary battery 1. It has the part 23 and the 2nd engaging part 24 which engages the edge 5b of the downward side. Note that the second portion 22 of the spacer member 2 </ b> C only needs to have at least one of the first engaging portion 23 and the second engaging portion 24.

第１の係合部２３は、二次電池１の幅方向に深さを有する溝状に形成され、第２の係合部２４は、二次電池１の高さ方向に深さを有する溝状に形成されている。また、溝状の第１の係合部２３及び第２の係合部２４は、二次電池１の積層方向に延在し、二次電池１の積層方向が開放され、サイドプレート５を二次電池１の積層方向に摺動可能に係合させるとともに、二次電池１の高さ方向及び幅方向におけるサイドプレート５の移動を規制する壁部２３ａ，２４ａを有する。   The first engagement portion 23 is formed in a groove shape having a depth in the width direction of the secondary battery 1, and the second engagement portion 24 is a groove having a depth in the height direction of the secondary battery 1. It is formed in a shape. The groove-shaped first engaging portion 23 and the second engaging portion 24 extend in the stacking direction of the secondary battery 1, the stacking direction of the secondary battery 1 is opened, and the side plate 5 is connected to the second plate 1. The secondary battery 1 includes wall portions 23a and 24a that are slidably engaged in the stacking direction and restrict the movement of the side plate 5 in the height direction and the width direction of the secondary battery 1.

第１の係合部２３の壁部２３ａは、二次電池１の積層方向に延在し、サイドプレート５の上端部の曲折部の上面に対向する壁面と、サイドプレート５の端縁５ａに対向する壁面と、サイドプレート５の上端部の曲折部の下面に対向する壁面とを有している。また、第２の係合部の壁部２４ａは、サイドプレート５の下端部の内側面に対向する壁面と、サイドプレートの下方側の端縁５ｂに対向する壁面と、サイドプレート５の下端部の外側面に対向する壁面とを有している。   The wall portion 23 a of the first engagement portion 23 extends in the stacking direction of the secondary battery 1, and faces the upper surface of the bent portion at the upper end portion of the side plate 5 and the edge 5 a of the side plate 5. The wall surface which opposes and the wall surface which opposes the lower surface of the bending part of the upper end part of the side plate 5 are provided. The wall portion 24a of the second engaging portion includes a wall surface facing the inner surface of the lower end portion of the side plate 5, a wall surface facing the lower edge 5b of the side plate, and a lower end portion of the side plate 5. And a wall surface facing the outer side surface.

サイドプレート５をスペーサ部材２Ｃの第１の係合部２３及び第２の係合部２４に対して係合させるには、まず、二次電池１の積層方向におけるサイドプレート５の一方の端部
、すなわち、サイドプレート５の長手方向の一方の端部を、第１の係合部２３及び第２の係合部２４の開放された端部に差し込む。そして、サイドプレート５をスペーサ部材２Ｃの第１の係合部２３及び第２の係合部２４に対して長手方向に摺動させることで、サイドプレート５を第１の係合部２３及び第２の係合部２４に係合させることができる。In order to engage the side plate 5 with the first engaging portion 23 and the second engaging portion 24 of the spacer member 2C, first, one end portion of the side plate 5 in the stacking direction of the secondary battery 1 is used. That is, one end portion of the side plate 5 in the longitudinal direction is inserted into the open end portions of the first engaging portion 23 and the second engaging portion 24. Then, the side plate 5 is slid in the longitudinal direction with respect to the first engaging portion 23 and the second engaging portion 24 of the spacer member 2C, so that the side plate 5 is moved to the first engaging portion 23 and the second engaging portion 24C. The two engaging portions 24 can be engaged.

このように、サイドプレート５に複数のスペーサ部材２Ｃの第２部分２２を係合させ、複数のスペーサ部材２Ｃの第１部分２１をサイドプレート５に対して櫛歯状に配置することができる。これにより、複数の二次電池１を厚さ方向に配列した状態で、複数のスペーサ部材２Ｃの第１部分２１を一括して二次電池１の間に配置したり、サイドプレート５に係合した複数のスペーサ部材２Ｃの櫛歯状の第１部分２１の間に二次電池１を配置したりすることができる。   In this manner, the second portions 22 of the plurality of spacer members 2 </ b> C can be engaged with the side plate 5, and the first portions 21 of the plurality of spacer members 2 </ b> C can be arranged in a comb shape with respect to the side plate 5. Thereby, in a state where the plurality of secondary batteries 1 are arranged in the thickness direction, the first portions 21 of the plurality of spacer members 2C are collectively disposed between the secondary batteries 1 or engaged with the side plate 5. The secondary battery 1 can be disposed between the comb-shaped first portions 21 of the plurality of spacer members 2C.

したがって、本実施形態の組電池１００Ａによれば、組立性を向上させ、生産性を向上させることができる。また、スペーサ部材２Ｃがサイドプレート５に対して二次電池１の積層方向に摺動することで、組電池１００Ａの組立時に、二次電池１の電池容器１０に対して二次電池１の積層方向に圧縮力を付与することが可能になる。   Therefore, according to the assembled battery 100 </ b> A of the present embodiment, it is possible to improve assembly and improve productivity. Further, the spacer member 2C slides in the stacking direction of the secondary battery 1 with respect to the side plate 5, so that the secondary battery 1 is stacked with respect to the battery container 10 of the secondary battery 1 when the assembled battery 100A is assembled. It is possible to apply a compressive force in the direction.

以上、図面を用いて本発明の実施の形態を詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。   The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

１ 二次電池
２ スペーサ部材
５ サイドプレート
５ａ 端縁
５ｂ 端縁
１０ｗ 広側面
１０ｎ 狭側面
２１ 第１部分
２２ 第２部分
２３ 係合部
２３ａ 壁部
２４ 係合部
２４ａ 壁部
１００ 組電池
１００Ａ 組電池DESCRIPTION OF SYMBOLS 1 Secondary battery 2 Spacer member 5 Side plate 5a End edge 5b End edge 10w Wide side surface 10n Narrow side surface 21 1st part 22 2nd part 23 Engagement part 23a Wall part 24 Engagement part 24a Wall part 100 Assembly battery 100A Assembly battery

Claims (6)

扁平角形の二次電池が厚さ方向にスペーサ部材と交互に積層され、前記二次電池の積層方向の両端に一対のエンドプレートが配置された組電池であって、
前記スペーサ部材は、前記二次電池の幅方向の一側と他側にそれぞれ配置され、前記幅方向に沿う前記二次電池の広側面の一部に対向する第１部分と、該第１部分に接続されて前記厚さ方向に沿う前記二次電池の狭側面の少なくとも一部に対向する第２部分と、を有し、
前記第１部分によって圧縮力が付与された複数の二次電池が前記一対のエンドプレートによって挟持されて固縛されていることを特徴とする組電池。 An assembled battery in which flat rectangular secondary batteries are alternately stacked with spacer members in the thickness direction, and a pair of end plates are disposed at both ends in the stacking direction of the secondary battery ,
The spacer member is disposed on one side and the other side in the width direction of the secondary battery, and faces a part of the wide side surface of the secondary battery along the width direction, and the first portion are connected have a, a second portion opposed to at least part of the narrow side of the secondary battery along the thickness direction,
Assembled battery characterized that you have been lashing is sandwiched a plurality of secondary batteries compressive force is imparted by the pair of end plates by said first portion. 前記第２部分は、前記積層方向に隣接する２つの前記二次電池の前記狭側面に対向することを特徴とする請求項１に記載の組電池。 The second part is assembled battery according to claim 1, characterized in that facing the narrow sides of two of said secondary batteries adjacent in the stacking direction. 前記第２部分は、前記積層方向に隣接する２つの前記二次電池のうち、一方の前記二次電池の前記狭側面に対向する面積と、他方の前記二次電池の前記狭側面に対向する面積とが等しいことを特徴とする請求項２に記載の組電池。   Of the two secondary batteries adjacent in the stacking direction, the second portion faces an area facing the narrow side surface of one of the secondary batteries and the narrow side surface of the other secondary battery. The assembled battery according to claim 2, wherein the area is equal. 前記第２部分は、前記積層方向に隣接する２つの前記二次電池のうち、一方の前記二次電池の前記狭側面に対向する面積と、他方の前記二次電池の前記狭側面に対向する面積とが異なることを特徴とする請求項２に記載の組電池。   Of the two secondary batteries adjacent in the stacking direction, the second portion faces an area facing the narrow side surface of one of the secondary batteries and the narrow side surface of the other secondary battery. The assembled battery according to claim 2, wherein the batteries have different areas. 前記第２部分は、積層方向に隣接する２つの前記二次電池のうち、一方の前記二次電池の前記狭側面のみに対向することを特徴とする請求項１に記載の組電池。   2. The assembled battery according to claim 1, wherein the second portion faces only the narrow side surface of one of the two secondary batteries adjacent in the stacking direction. 複数の前記スペーサ部材の前記第２部分に対向するサイドプレートをさらに備え、
前記第２部分は、前記二次電池の前記積層方向に延在する前記サイドプレートの前記積層方向に交差する方向における一対の端縁のうち、少なくとも一方の端縁を係合させる係合部を有し、
前記係合部は、前記積層方向が開放されて前記サイドプレートを前記積層方向に摺動可能に係合させるとともに、前記二次電池の高さ方向及び前記幅方向における前記サイドプレートの移動を規制する壁部を有することを特徴とする請求項１から請求項５のいずれか一項に記載の組電池。 A side plate facing the second part of the plurality of spacer members;
Said second portion, a pair of edges in the direction crossing the stacking direction of the side plate that extends in the stacking direction of the battery, the engaging portion for engaging at least one edge Have
The engaging portion opens the stacking direction and engages the side plate so as to be slidable in the stacking direction, and regulates movement of the side plate in the height direction and the width direction of the secondary battery. The assembled battery according to claim 1, further comprising a wall portion.
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