JP5755101B2 - Battery holding structure - Google Patents

Battery holding structure Download PDF

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JP5755101B2
JP5755101B2 JP2011224121A JP2011224121A JP5755101B2 JP 5755101 B2 JP5755101 B2 JP 5755101B2 JP 2011224121 A JP2011224121 A JP 2011224121A JP 2011224121 A JP2011224121 A JP 2011224121A JP 5755101 B2 JP5755101 B2 JP 5755101B2
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battery
holder
recess
resin
gap
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JP2013008655A (en
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友敬 刑部
友敬 刑部
村山　僚悟
僚悟 村山
智 水谷
智 水谷
伸得 藤原
伸得 藤原
木村　健治
健治 木村
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Toyota Motor Corp
Kojima Industries Corp
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Kojima Industries Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Description

本発明は、複数個並列に（横並びに）配置される電池を、ホルダにて電池の側面で保持する、電池保持構造に関する。   The present invention relates to a battery holding structure in which a plurality of batteries arranged in parallel (side by side) are held on the side of a battery by a holder.

特開２００８−３４２９６号公報は、複数個並列に（横並びに）並べて配置される円筒型電池を、円筒部を有する樹脂製のホルダにて電池の側面で保持する、電池保持構造を開示している。 Japanese Patent Laid-Open No. 2008-34296 discloses a battery holding structure in which a plurality of cylindrical batteries arranged side by side (side by side) are held on the side of the battery by a resin holder having a cylindrical portion. Yes.

しかし、従来の電池保持構造には、つぎの問題点がある。
（ａ）電池が電池の軸方向にホルダから比較的容易に抜けてしまう。
（ｂ）電池をホルダの円筒部に挿入した際にホルダが電池により電池の径方向に撓むため、電池自体の寸法誤差の影響、電池自体の温度変化や充放電による膨張収縮の影響が、ホルダの最外形に影響を及ぼしてしまう。 However, the conventional battery holding structure has the following problems.
(A) The battery comes out of the holder relatively easily in the axial direction of the battery.
(B) When the battery is inserted into the cylindrical portion of the holder, the holder bends in the radial direction of the battery by the battery, so the influence of the dimensional error of the battery itself, the temperature change of the battery itself and the expansion and contraction due to charging and discharging, This will affect the outermost shape of the holder.

特開２００８−３４２９６号公報JP 2008-34296 A

本発明の目的は、従来に比べて、電池がホルダから抜けにくく、電池の寸法がホルダの最外形に影響を及ぼすことを抑制できる、電池保持構造を提供することにある。   The objective of this invention is providing the battery holding structure which can suppress that a battery is difficult to remove | deviate from a holder compared with the past, and the dimension of a battery influences the outermost shape of a holder.

上記目的を達成する本発明はつぎの通りである。
（１） 複数個並列に配置される電池を、ホルダにて前記電池の側面で保持する、電池保持構造であって、
前記電池の側面と前記ホルダの前記電池の側面に対向する電池対向面との間の隙間が、該隙間に樹脂を流入して固化させることで、該樹脂で充填されており、
前記電池の側面および／または前記ホルダの電池対向面に、前記隙間の容積を大にする方向に凹む第２の凹部が設けられており、
前記第２の凹部は、該第２の凹部が設けられる面の周方向の一部で、該第２の凹部が設けられる面の周方向と直交する方向に延びて設けられており、前記樹脂で充填されており、
前記第２の凹部は、該第２の凹部が設けられる面の周方向と直交する方向で前記隙間の全体にわたって連続して設けられている、電池保持構造。
（２） 前記電池の側面および／または前記ホルダの電池対向面に、前記隙間の容積を大にする方向に凹む第１の凹部が設けられており、
前記第１の凹部は、該第１の凹部が設けられる面の周方向と直交する方向の一部で、該第１の凹部が設けられる面の周方向に延びて設けられており、前記樹脂で充填されている、（１）記載の電池保持構造。
（３） 前記樹脂は、前記隙間から該隙間の外にはみ出すはみ出し部を備える、（１）または（２）記載の電池保持構造。
（４） 前記はみ出し部のはみ出し量は、前記ホルダから前記電池に近づくにつれて大とされている、（３）記載の電池保持構造。 The present invention for achieving the above object is as follows.
(1) A battery holding structure in which a plurality of batteries arranged in parallel are held on a side surface of the battery by a holder,
A gap between a side surface of the battery and a battery facing surface of the holder that faces the side surface of the battery is filled with the resin by allowing the resin to flow into the gap and solidify .
A second recess that is recessed in the direction of increasing the volume of the gap is provided on a side surface of the battery and / or a battery facing surface of the holder;
The second recess is a part of the circumferential direction of the surface on which the second recess is provided and extends in a direction perpendicular to the circumferential direction of the surface on which the second recess is provided, and the resin Filled with
The battery holding structure , wherein the second recess is provided continuously over the entire gap in a direction orthogonal to the circumferential direction of the surface on which the second recess is provided .
(2) A first recess that is recessed in the direction of increasing the volume of the gap is provided on a side surface of the battery and / or a battery facing surface of the holder,
The first recess is a part of a direction perpendicular to the circumferential direction of the surface on which the first recess is provided and extends in the circumferential direction of the surface on which the first recess is provided, and the resin in is filled, (1) battery holding structure according.
(3 ) The battery holding structure according to (1) or (2) , wherein the resin includes a protruding portion that protrudes outside the gap from the gap.
( 4 ) The battery holding structure according to ( 3 ), wherein an amount of protrusion of the protruding portion is increased as the distance from the holder approaches the battery.

上記（１）の電池保持構造によれば、つぎの効果を得ることができる。
電池の側面とホルダの電池対向面との間の隙間が、該隙間に樹脂を流入して固化させることで、樹脂で充填されているため、樹脂と電池および／またはホルダとの接着力を利用して電池をホルダで保持することができる。そのため、従来に比べて、電池をホルダから抜けにくくすることができる。
また、電池の寸法誤差は、電池の側面とホルダの電池対向面との間の隙間の容積（大きさ）に影響を及ぼすだけであり、この隙間に流入される樹脂量に影響を及ぼすだけである。そのため、電池の寸法誤差がホルダの最外形に影響を及ぼすことを従来に比べて抑制できる。
また、電池の温度変化や充放電による膨張収縮は、隙間に流入されて固化された樹脂の弾性変形にて吸収できる。そのため、電池の温度変化や充放電による膨張収縮がホルダの最外形に影響を及ぼすことを従来に比べて抑制できる。
また、電池の側面および／またはホルダの電池対向面に、隙間の容積を大にする方向に凹む周方向と直交する方向に延びる第２の凹部が設けられているため、電池の側面とホルダの電池対向面との間の隙間に樹脂を流入させる際に第２の凹部がフローリーダー部として働く。そのため、第２の凹部以外の部分における電池の側面とホルダの電池対向面との間の隙間が比較的狭い場合であっても、該隙間に樹脂を流入させることができる。そのため、第２の凹部が設けられていない場合に比べて、第２の凹部以外の部分における電池の側面とホルダの電池対向面との間の隙間を狭くすることができ、ホルダ（電池保持構造）を小型化できる。 According to the battery holding structure of (1) above, the following effects can be obtained.
The gap between the side of the battery and the battery facing surface of the holder is filled with the resin by allowing the resin to flow into the gap and solidify, so the adhesive force between the resin and the battery and / or the holder is used. Thus, the battery can be held by the holder. Therefore, it is possible to make it difficult to remove the battery from the holder as compared with the conventional case.
The dimensional error of the battery only affects the volume (size) of the gap between the side surface of the battery and the battery facing surface of the holder, and only affects the amount of resin flowing into this gap. is there. Therefore, it can suppress compared with the past that the dimensional error of a battery affects the outermost shape of a holder.
In addition, expansion and contraction due to battery temperature change and charging / discharging can be absorbed by elastic deformation of the resin that has flowed into the gap and solidified. Therefore, it can suppress compared with the past that the temperature change of a battery or the expansion / contraction by charging / discharging affects the outermost shape of a holder.
Moreover, since the 2nd recessed part extended in the direction orthogonal to the circumferential direction dented in the direction which enlarges the volume of a clearance gap is provided in the side surface of a battery and / or the battery opposing surface of a holder, the side surface of a battery and a holder When the resin flows into the gap between the battery facing surface, the second recess functions as a flow leader portion. Therefore, even when the gap between the side surface of the battery and the battery facing surface of the holder in a portion other than the second recess is relatively narrow, the resin can flow into the gap. Therefore, compared with the case where the second recess is not provided, the gap between the side surface of the battery and the battery facing surface of the holder in a portion other than the second recess can be narrowed. ) Can be miniaturized.

上記（２）の電池保持構造によれば、つぎの効果を得ることができる。
電池の側面および／またはホルダの電池対向面に、隙間の容積を大にする方向に凹む周方向に延びる第１の凹部が設けられており、該第１の凹部も樹脂で充填されているため、電池および／またはホルダのうち第１の凹部が設けられている部材から樹脂が剥がれてしまった場合であっても、第１の凹部内の樹脂が、第１の凹部が設けられている部材に引っかかる。そのため、第１の凹部が設けられ該第１の凹部に樹脂が充填されていない場合に比べて、ホルダの樹脂を介する電池保持力を大にすることができ、電池をホルダから抜けにくくすることができる。 According to the battery holding structure of (2) above, the following effects can be obtained.
A first concave portion extending in the circumferential direction is provided on the side surface of the battery and / or the battery facing surface of the holder so as to dent in the direction of increasing the volume of the gap, and the first concave portion is also filled with resin. The member in which the resin in the first recess is provided with the first recess even if the resin is peeled off from the member in the battery and / or holder provided with the first recess. I get caught in. Therefore, compared with the case where the first concave portion is provided and the first concave portion is not filled with resin, the battery holding force through the resin of the holder can be increased, and the battery is difficult to be removed from the holder. Can do .

上記（３）の電池保持構造によれば、つぎの効果を得ることができる。
樹脂が隙間から隙間の外にはみ出すはみ出し部を備えるため、樹脂がはみ出し部を備えていない場合に比べて、樹脂と電池およびホルダとの接触面積（接着面積）を大にすることができる。そのため、ホルダの樹脂を介する電池保持力を大にすることができ、電池をホルダから抜けにくくすることができる。 According to the battery holding structure of ( 3 ) above, the following effects can be obtained.
Since the resin includes the protruding portion that protrudes from the gap to the outside of the gap, the contact area (adhesion area) between the resin, the battery, and the holder can be increased as compared with the case where the resin does not include the protruding portion. Therefore, the battery holding force through the resin of the holder can be increased, and the battery can be hardly removed from the holder.

上記（４）の電池保持構造によれば、つぎの効果を得ることができる。
はみ出し部のはみ出し量が、ホルダから電池に近づくにつれて大とされているため、樹脂を成形する金型の、はみ出し部を成形するための部分に、傾斜面を設けることができる。その結果、金型に傾斜面が設けられていない場合に比べて、金型に電池とホルダをセットして樹脂をインサート成形する際に、電池が金型に引っ掛かりにくくなり電池を容易に金型にセットすることができる。 According to the battery holding structure of ( 4 ) above, the following effects can be obtained.
Since the protruding amount of the protruding portion is increased as the battery approaches the battery from the holder, an inclined surface can be provided in the portion for molding the protruding portion of the mold for molding the resin. As a result, compared to the case where the mold is not provided with an inclined surface, when the battery and holder are set in the mold and the resin is insert-molded, the battery is less likely to be caught in the mold and the battery is easily molded. Can be set.

本発明実施例の電池保持構造の平面図である。ただし、電池の側面とホルダの電池対向面との間の隙間に充填される樹脂は省略している。It is a top view of the battery holding structure of this invention Example. However, the resin filled in the gap between the side surface of the battery and the battery facing surface of the holder is omitted. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 本発明実施例の電池保持構造における樹脂を成形する金型の、電池とホルダをセットした状態の部分断面図である。It is a fragmentary sectional view of the state which set the battery and the holder of the metallic mold which molds the resin in the battery holding structure of the example of the present invention. 本発明実施例の電池保持構造の、電池の側面に第１の凹部が設けられている場合の、電池とその近傍の部分断面図である。It is a fragmentary sectional view of a battery and its vicinity in case the 1st recessed part is provided in the side surface of the battery of the battery holding structure of this invention Example. 本発明実施例の電池保持構造の、ホルダの電池対向面に第２の凹部が３個設けられている場合の、部分平面図である。ただし、電池の側面とホルダの電池対向面との間の隙間に充填される樹脂は省略している。It is a fragmentary top view in case the three 2nd recessed parts are provided in the battery opposing surface of the holder of the battery holding structure of this invention Example. However, the resin filled in the gap between the side surface of the battery and the battery facing surface of the holder is omitted. 図５のＢ−Ｂ線断面図である。FIG. 6 is a sectional view taken along line B-B in FIG. 5. 本発明実施例の電池保持構造の、ホルダの電池対向面に第２の凹部が６個設けられている場合の、部分平面図である。ただし、電池の側面とホルダの電池対向面との間の隙間に充填される樹脂は省略している。It is a partial top view in case the six 2nd recessed parts are provided in the battery opposing surface of the holder of the battery holding structure of this invention Example. However, the resin filled in the gap between the side surface of the battery and the battery facing surface of the holder is omitted. 本発明実施例の電池保持構造の、ホルダの電池対向面に第２の凹部が９個設けられている場合の、部分平面図である。ただし、電池の側面とホルダの電池対向面との間の隙間に充填される樹脂は省略している。It is a fragmentary top view in case the nine 2nd recessed parts are provided in the battery opposing surface of the holder of the battery holding structure of this invention Example. However, the resin filled in the gap between the side surface of the battery and the battery facing surface of the holder is omitted. 本発明実施例の電池保持構造の、ホルダの電池対向面に第２の凹部が１２個設けられている場合の、部分平面図である。ただし、電池の側面とホルダの電池対向面との間の隙間に充填される樹脂は省略している。It is a fragmentary top view in case the 12 2nd recessed parts are provided in the battery opposing surface of the holder of the battery holding structure of this invention Example. However, the resin filled in the gap between the side surface of the battery and the battery facing surface of the holder is omitted.

以下に、本発明実施例の電池保持構造を、図面を参照して説明する。
本発明実施例の電池保持構造（電池保持装置）１０は、図２に示すように、複数個並列に配置される電池２０の各電池２０を、ホルダ３０にて電池２０の側面２１で保持する、電池保持構造である。なお、ここでいう「並列」とは、電池の並び方を示すものであり、電池を横並びに並べる並べ方を示すものである。 Hereinafter, a battery holding structure according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 2, the battery holding structure (battery holding device) 10 of the embodiment of the present invention holds each battery 20 of a plurality of batteries 20 arranged in parallel on a side surface 21 of the battery 20 with a holder 30. The battery holding structure. Here, “parallel” indicates how the batteries are arranged, and indicates how the batteries are arranged side by side.

電池２０は、たとえば自動車に搭載される電池である。電池２０は、リチウムイオン円筒型電池である。ただし、電池２０は、円筒型電池に限定されるものではなく、角型電池であってもよい。また、電池２０は、リチウムイオン電池に限定されるものではなく、ニッケル水素電池等であってもよい。   The battery 20 is a battery mounted on, for example, an automobile. The battery 20 is a lithium ion cylindrical battery. However, the battery 20 is not limited to a cylindrical battery, and may be a square battery. Moreover, the battery 20 is not limited to a lithium ion battery, A nickel hydride battery etc. may be sufficient.

互いに隣り合う電池２０同士は、一方の電池２０が他方の電池２０の熱の影響を受けることを抑制するために、互いに間隔をおいて配置されている。電池２０が円筒型電池である場合、複数の電池２０は、格子状に配置されていてもよいが、図１に示すように、省スペース化のために隣り合う２列が千鳥足状となるように配置されていることが望ましい。   The batteries 20 adjacent to each other are arranged at intervals from each other in order to prevent one battery 20 from being affected by the heat of the other battery 20. When the battery 20 is a cylindrical battery, the plurality of batteries 20 may be arranged in a lattice shape, but as shown in FIG. 1, two adjacent rows are staggered to save space. It is desirable to be arranged in.

ホルダ３０は、一部品構成である。ただし、ホルダ３０は、複数部品が組付けられて一体化したものであってもよい。ホルダ３０は、たとえば、アルミ合金製等の金属製である。ただし、ホルダ３０は樹脂製であってもよい。ホルダ３０は変形しないかまたは変形しても無視できる程度とされており、ホルダ３０が積極的に変形して電池２０の寸法誤差や形状変化を吸収することはない。   The holder 30 has a one-part configuration. However, the holder 30 may be integrated by assembling a plurality of components. The holder 30 is made of metal such as aluminum alloy. However, the holder 30 may be made of resin. The holder 30 does not deform or is negligible even when deformed, and the holder 30 is not actively deformed to absorb the dimensional error or shape change of the battery 20.

ホルダ３０は、図２に示すように、電池２０の側面２１のみで、電池２０を保持する。なお、「電池の側面」とは、電池２０の電極が設けられる面と直交する面であり、電池２０が円筒型電池の場合電池２０の軸方向に延びる面（円筒面）である。ホルダ３０は、電池２０を、電池２０の側面２１の全周で保持している。ホルダ３０は、電池２０を、電池２０の側面２１の周方向と直交する方向の一部のみ（電池２０が円筒型電池の場合には電池２０の軸方向の一部のみ）で保持する。 As shown in FIG. 2, the holder 30 holds the battery 20 only by the side surface 21 of the battery 20. The “side surface of the battery” is a surface orthogonal to the surface on which the electrode of the battery 20 is provided, and is a surface (cylindrical surface) extending in the axial direction of the battery 20 when the battery 20 is a cylindrical battery. The holder 30 holds the battery 20 on the entire circumference of the side surface 21 of the battery 20. The holder 30 holds the battery 20 only in a part in a direction orthogonal to the circumferential direction of the side surface 21 of the battery 20 (only a part in the axial direction of the battery 20 when the battery 20 is a cylindrical battery).

ホルダ３０には、図１に示すように、ホルダ３０で保持する電池２０の数と同数の電池保持用穴３１が設けられており、１個の電池保持用穴３１に１個の電池２０が位置している。各電池保持用穴３１の径は、同一とされており、電池２０の寸法誤差、電池２０の温度変化や充放電による径方向の寸法変化に対応できるように、電池２０の設計上の径よりたとえば半径２ｍｍ程度大とされている。そのため、電池２０の側面２１とホルダ３０の電池２０の側面２１に対向する電池対向面３２（ホルダ３０の電池保持用穴３１の周面）との間には、隙間Ｓが存在する。隙間Ｓは電池２０の全周にわたって存在している。 As shown in FIG. 1, the holder 30 is provided with the same number of battery holding holes 31 as the number of the batteries 20 held by the holder 30, and one battery 20 is provided in one battery holding hole 31. positioned. The diameters of the respective battery holding holes 31 are the same, and are larger than the design diameter of the battery 20 so as to cope with a dimensional error of the battery 20, a temperature change of the battery 20, and a radial dimension change due to charging / discharging. For example, the radius is about 2 mm. Therefore, a gap S exists between the side surface 21 of the battery 20 and the battery facing surface 32 (the peripheral surface of the battery holding hole 31 of the holder 30) facing the side surface 21 of the battery 20 of the holder 30. The gap S exists over the entire circumference of the battery 20.

隙間Ｓは、図２に示すように、隙間Ｓに樹脂４０を流入して固化させることで、樹脂４０で充填されている（埋められている）。   As shown in FIG. 2, the gap S is filled (filled) with the resin 40 by allowing the resin 40 to flow into the gap S to be solidified.

図４に示すように、電池２０の側面２１および／またはホルダ３０の電池対向面３２に隙間Ｓの容積を大にする方向に凹む第１の凹部５０が設けられていてもよい。第１の凹部５０が設けられている場合には、第１の凹部５０も樹脂４０で充填されている。なお、図４は、電池２０の側面２１のみに第１の凹部５０が設けられており、ホルダ３０の電池対向面３２には第１の凹部５０が設けられていない場合を示している。 As shown in FIG. 4, a first recess 50 that is recessed in the direction of increasing the volume of the gap S may be provided on the side surface 21 of the battery 20 and / or the battery facing surface 32 of the holder 30. In the case where the first recess 50 is provided, the first recess 50 is also filled with the resin 40. FIG. 4 shows a case where the first recess 50 is provided only on the side surface 21 of the battery 20, and the first recess 50 is not provided on the battery facing surface 32 of the holder 30.

第１の凹部５０は、第１の凹部５０が設けられる面の周方向と直交する方向（第１の凹部５０が設けられる面の軸方向）の一部で、第１の凹部５０が設けられる面の周方向に延びて設けられている。第１の凹部５０は、第１の凹部５０が設けられる面の全周にわたって連続して設けられていることが望ましいが、第１の凹部５０が設けられる面の周方向の一部のみに設けられていてもよい。第１の凹部５０が電池２０の側面２１に設けられる場合、第１の凹部５０は、電池２０の側面２１の周方向と直交する方向の一部に電池２０を製造する際にできるカシメ部であってもよく、該カシメ部とは別に形成される凹部であってもよい。   The first recess 50 is a part of the direction (axial direction of the surface where the first recess 50 is provided) orthogonal to the circumferential direction of the surface where the first recess 50 is provided, and the first recess 50 is provided. It extends in the circumferential direction of the surface. The first recess 50 is desirably provided continuously over the entire circumference of the surface where the first recess 50 is provided, but is provided only in a part of the circumferential direction of the surface where the first recess 50 is provided. It may be done. When the first concave portion 50 is provided on the side surface 21 of the battery 20, the first concave portion 50 is a caulking portion that can be formed when the battery 20 is manufactured in a part of the direction orthogonal to the circumferential direction of the side surface 21 of the battery 20. There may be a recess formed separately from the crimped portion.

また、図５〜図９に示すように、電池２０の側面２１および／またはホルダ３０の電池対向面３２に、隙間Ｓの容積を大にする方向に凹む第２の凹部５１が設けられていてもよい。第２の凹部５１が設けられている場合には、第２の凹部５１も樹脂４０で充填されている。なお、図５〜図９は、ホルダ３０の電池対向面３２のみに第２の凹部５１が設けられており、電池２０の側面２１には第２の凹部５１が設けられていない場合を示している。 5-9, the side surface 21 of the battery 20 and / or the battery facing surface 32 of the holder 30 is provided with a second recess 51 that is recessed in the direction of increasing the volume of the gap S. Also good. In the case where the second recess 51 is provided, the second recess 51 is also filled with the resin 40. 5 to 9 show a case where the second concave portion 51 is provided only on the battery facing surface 32 of the holder 30 and the second concave portion 51 is not provided on the side surface 21 of the battery 20. Yes.

第２の凹部５１は、第２の凹部５１が設けられる面の周方向の一部で、第２の凹部５１が設けられる面の周方向と直交する方向（第２の凹部５１が設けられる面の軸方向）に延びて設けられている。第２の凹部５１の横断面形状は、第２の凹部５１の形成を容易に行なうことができるように、角部を持たない半円形（略半円形を含む）であることが望ましい。第２の凹部５１は、第２の凹部５１が設けられる面の周方向と直交する方向で、隙間Ｓの全体（全域）にわたって連続して設けられている。 The second concave portion 51 is a part of the circumferential direction of the surface on which the second concave portion 51 is provided, and the direction perpendicular to the circumferential direction of the surface on which the second concave portion 51 is provided (the surface on which the second concave portion 51 is provided). Extending in the axial direction). The cross-sectional shape of the second recess 51 is preferably a semicircular shape (including a substantially semicircular shape) having no corners so that the second recess 51 can be easily formed. The second recess 51 is continuously provided over the entire gap (entire area) in a direction perpendicular to the circumferential direction of the surface on which the second recess 51 is provided.

第２の凹部５１は、第２の凹部５１が設けられる面の周方向に等間隔に複数設けられていることが望ましい。第２の凹部５１が、第２の凹部５１が設けられる面の周方向に１つしか設けられていない場合、または、第２の凹部５１が設けられる面の周方向に片寄って複数設けられている場合に比べて、第２の凹部５１が設けられる面の全周にわたって第２の凹部５１によるフローリーダー効果を効果的に得ることができるからである。第２の凹部５１は、図５に示すように、第２の凹部５１が設けられる面の周方向に等間隔に３個設けられていてもよく、図７に示すように、第２の凹部５１が設けられる面の周方向に等間隔に６個設けられていてもよく、図８に示すように、第２の凹部５１が設けられる面の周方向に等間隔に９個設けられていてもよく、図９に示すように、第２の凹部５１が設けられる面の周方向に等間隔に１２個設けられていてもよい。なお、図示例では第２の凹部５１が３の倍数個設けられる場合を示しているが、第２の凹部５１の数は、３の倍数個以外であってもよい。 As for the 2nd recessed part 51, it is desirable to provide with two or more at equal intervals in the circumferential direction of the surface in which the 2nd recessed part 51 is provided. When only one second concave portion 51 is provided in the circumferential direction of the surface on which the second concave portion 51 is provided, or a plurality of the second concave portions 51 are provided in the circumferential direction of the surface on which the second concave portion 51 is provided. This is because the flow leader effect by the second recess 51 can be effectively obtained over the entire circumference of the surface where the second recess 51 is provided, as compared with the case where the second recess 51 is provided. As shown in FIG. 5, three second recesses 51 may be provided at equal intervals in the circumferential direction of the surface on which the second recess 51 is provided. As shown in FIG. 6 may be provided at equal intervals in the circumferential direction of the surface on which 51 is provided, and as shown in FIG. 8, nine are provided at equal intervals in the circumferential direction of the surface on which the second recess 51 is provided. Alternatively, as shown in FIG. 9, twelve may be provided at equal intervals in the circumferential direction of the surface on which the second recess 51 is provided. In the illustrated example, a case is shown in which multiple second recesses 51 are provided. However, the number of second recesses 51 may be other than multiples of 3.

樹脂４０は、図２に示すように、隙間Ｓから隙間Ｓの外にはみ出すはみ出し部４１を備える。はみ出し部４１は、隙間Ｓから、電池２０の側面２１の周方向と直交する方向（電池２０が円筒型電池の場合には電池２０の軸方向）にはみ出す部分である。はみ出し部４１の隙間Ｓからのはみ出し量は、ホルダ３０から電池２０に近づくにつれて大とされている。はみ出し部４１の一部は、ホルダ３０の、電池２０の側面２１の周方向と直交する方向の両側に（図２〜図４、図６の上下方向の両側に）回り込んでいる。   As shown in FIG. 2, the resin 40 includes a protruding portion 41 that protrudes from the gap S to the outside of the gap S. The protruding portion 41 is a portion protruding from the gap S in a direction orthogonal to the circumferential direction of the side surface 21 of the battery 20 (in the case where the battery 20 is a cylindrical battery, the axial direction of the battery 20). The amount of protrusion from the gap S of the protrusion 41 is increased as the holder 30 approaches the battery 20. A part of the protruding portion 41 wraps around both sides of the holder 30 in a direction orthogonal to the circumferential direction of the side surface 21 of the battery 20 (on both sides in the vertical direction in FIGS. 2 to 4 and 6).

樹脂４０は、図３に示すように、樹脂４０を成形する金型６０に電池２０とホルダ３０をセット（インサート）した状態で成形（インサート成形）される。ただし、樹脂４０は、図示はしないが、樹脂４０を成形する成形機（成形型）に電池２０とホルダ３０をセットした状態でポッティングにて成形されていてもよい。また、樹脂４０は、ホルダ３０が樹脂製である場合には、金型６０または図示略の成形機に電池２０のみをセットした状態で成形されていてもよい。 As shown in FIG. 3, the resin 40 is molded (insert molding) in a state where the battery 20 and the holder 30 are set (inserted) in a mold 60 for molding the resin 40. However, although not shown, the resin 40 may be molded by potting with the battery 20 and the holder 30 set in a molding machine (molding die) for molding the resin 40. Further, when the holder 30 is made of resin, the resin 40 may be molded in a state where only the battery 20 is set in the mold 60 or a molding machine (not shown).

つぎに、本発明実施例の作用を説明する。
（Ａ）電池２０の側面２１とホルダ３０の電池対向面３２との間の隙間Ｓが、隙間Ｓに樹脂４０を流入して固化させることで、樹脂４０で充填されているため、樹脂４０と電池２０および／またはホルダ３０との接着力を利用して電池２０をホルダ３０で保持することができる。そのため、従来に比べて、電池２０をホルダ３０から抜けにくくすることができる。 Next, the operation of the embodiment of the present invention will be described.
(A) Since the gap S between the side surface 21 of the battery 20 and the battery facing surface 32 of the holder 30 is filled with the resin 40 by flowing the resin 40 into the gap S and solidifying, the resin 40 The battery 20 can be held by the holder 30 using the adhesive force with the battery 20 and / or the holder 30. Therefore, it is possible to make it difficult to remove the battery 20 from the holder 30 as compared with the conventional case.

（Ｂ）電池２０の寸法誤差は、電池２０の側面２１とホルダ３０の電池対向面３２との間の隙間Ｓの容積（大きさ）に影響を及ぼすだけであり、この隙間Ｓに流入される樹脂４０の量に影響を及ぼすだけである。そのため、電池２０の寸法誤差がホルダ３０の最外形に影響を及ぼすことを従来に比べて抑制できる。 (B) The dimensional error of the battery 20 only affects the volume (size) of the gap S between the side surface 21 of the battery 20 and the battery facing surface 32 of the holder 30, and flows into the gap S. It only affects the amount of resin 40. Therefore, it can suppress compared with the past that the dimensional error of the battery 20 affects the outermost shape of the holder 30. FIG.

（Ｃ）電池２０の温度変化や充放電による膨張収縮は、隙間Ｓに流入されて固化された樹脂４０の弾性力を利用した変形（引張圧縮）にて吸収できる。そのため、電池２０の温度変化や充放電による膨張収縮がホルダ３０の最外形に影響を及ぼすことを従来に比べて抑制できる。 (C) The expansion and contraction due to the temperature change or charging / discharging of the battery 20 can be absorbed by deformation (tensile compression) using the elastic force of the resin 40 that has flowed into the gap S and solidified. Therefore, it can suppress compared with the past that the temperature change of the battery 20 and the expansion / contraction by charging / discharging affect the outermost shape of the holder 30. FIG.

（Ｄ）電池２０の側面２１および／またはホルダ３０の電池対向面３２に、隙間Ｓの容積を大にする方向に凹む第１の凹部５０が設けられており、第１の凹部５０も樹脂４０で充填されているため、電池２０および／またはホルダ３０のうち第１の凹部５０が設けられている部材から樹脂４０が剥がれてしまった場合であっても、第１の凹部５０内の樹脂が、第１の凹部５０が設けられている部材に引っかかる。そのため、第１の凹部５０が設けられ該第１の凹部５０に樹脂４０が充填されていない場合に比べて、ホルダ３０の樹脂４０を介する電池２０保持力を大にすることができ、電池２０をホルダ３０から抜けにくくすることができる。 (D) A first recess 50 that is recessed in the direction of increasing the volume of the gap S is provided on the side surface 21 of the battery 20 and / or the battery facing surface 32 of the holder 30, and the first recess 50 is also the resin 40. Therefore, even if the resin 40 is peeled off from the member of the battery 20 and / or the holder 30 where the first recess 50 is provided, the resin in the first recess 50 remains. The first recess 50 is caught by a member. Therefore, compared with the case where the first recess 50 is provided and the first recess 50 is not filled with the resin 40, the holding power of the battery 20 through the resin 40 of the holder 30 can be increased, and the battery 20 Can be made difficult to remove from the holder 30.

（Ｅ）電池２０の側面２１および／またはホルダ３０の電池対向面３２に、隙間Ｓの容積を大にする方向に凹む周方向と直交する方向に延びる第２の凹部５１が設けられているため、電池２０の側面２１とホルダ３０の電池対向面３２との間の隙間Ｓに樹脂を流入させる際に第２の凹部５１がフローリーダー部として働く。そのため、第２の凹部５１以外の部分における電池２０の側面２１とホルダ３０の電池対向面３２との間の隙間Ｓが比較的狭い場合であっても、該隙間Ｓに樹脂を流入させることができる。そのため、第２の凹部５１が設けられていない場合に比べて、第２の凹部５１以外の部分における電池２０の側面２１とホルダ３０の電池対向面３２との間の隙間Ｓを狭くすることができ、ホルダ３０（電池保持構造１０）を小型化できる。 (E) Since the side surface 21 of the battery 20 and / or the battery facing surface 32 of the holder 30 is provided with the second recess 51 extending in the direction orthogonal to the circumferential direction that is recessed in the direction of increasing the volume of the gap S. When the resin is caused to flow into the gap S between the side surface 21 of the battery 20 and the battery facing surface 32 of the holder 30, the second recess 51 functions as a flow leader portion. Therefore, even when the gap S between the side surface 21 of the battery 20 and the battery facing surface 32 of the holder 30 in a portion other than the second concave portion 51 is relatively narrow, the resin can flow into the gap S. it can. Therefore, the gap S between the side surface 21 of the battery 20 and the battery facing surface 32 of the holder 30 in a portion other than the second concave portion 51 can be narrowed compared to the case where the second concave portion 51 is not provided. The holder 30 (battery holding structure 10) can be downsized.

（Ｆ）樹脂４０が隙間Ｓから隙間Ｓの外にはみ出すはみ出し部４１を備えるため、樹脂４０がはみ出し部４１を備えていない場合に比べて、樹脂４０と電池２０およびホルダ３０との接触面積（接着面積）を大にすることができる。そのため、ホルダ３０の樹脂４０を介する電池２０保持力を大にすることができ、電池２０をホルダ３０から抜けにくくすることができる。 (F) Since the resin 40 includes the protruding portion 41 that protrudes from the gap S to the outside of the gap S, compared to the case where the resin 40 does not include the protruding portion 41, the contact area between the resin 40, the battery 20, and the holder 30 ( (Bonding area) can be increased. Therefore, the holding power of the battery 20 through the resin 40 of the holder 30 can be increased, and the battery 20 can be hardly removed from the holder 30.

（Ｇ）樹脂４０が隙間Ｓから隙間Ｓの外にはみ出すはみ出し部４１を備えるため、樹脂４０がはみ出し部４１を備えていない場合に比べて、樹脂４０と電池２０およびホルダ３０との接触面積（接着面積）を大にすることができ、電池２０が車両走行振動等によりホルダ３０に対して左右に傾いてしまうことを抑制できる。 (G) Since the resin 40 includes the protruding portion 41 that protrudes from the gap S to the outside of the gap S, compared to the case where the resin 40 does not include the protruding portion 41, the contact area between the resin 40, the battery 20, and the holder 30 ( The adhesion area) can be increased, and the battery 20 can be prevented from tilting left and right with respect to the holder 30 due to vehicle running vibration or the like.

（Ｈ）はみ出し部４１のはみ出し量が、ホルダ３０から電池２０に近づくにつれて大とされているため、樹脂４０を成形する金型６０の、はみ出し部４１を成形するための部分に、傾斜面６１を設けることができる。その結果、金型６０に傾斜面６１が設けられていない場合に比べて、樹脂４０をインサート成形するために金型６０に電池２０をセットする際に、電池２０が金型６０に引っ掛かりにくくなり電池２０を容易に金型６０にセットすることができる。 (H) Since the amount of protrusion of the protruding portion 41 is increased as the distance from the holder 30 to the battery 20 increases, the inclined surface 61 is formed on the portion of the mold 60 for forming the resin 40 for forming the protruding portion 41. Can be provided. As a result, compared to the case where the mold 60 is not provided with the inclined surface 61, the battery 20 is less likely to be caught by the mold 60 when the battery 20 is set in the mold 60 for insert molding of the resin 40. The battery 20 can be easily set in the mold 60.

（Ｉ）樹脂４０を隙間Ｓに流入させて固化させることで、樹脂４０を介してホルダ３０で電池２０を保持するため、電池保持構造１０の構造をほとんど複雑化させることなく、ホルダ３０による電池２０の保持力を強固にすることができる。 (I) Since the battery 40 is held by the holder 30 via the resin 40 by allowing the resin 40 to flow into the gap S and solidifying, the battery by the holder 30 is hardly complicated. The holding force of 20 can be strengthened.

（Ｊ）電池２０の側面２１とホルダ３０との間の隙間Ｓが樹脂４０で充填されているため、ホルダ３０が金属製であっても電池２０とホルダ３０とを電気的に絶縁させることができる。また、電池２０とホルダ３０との間での熱の授受を抑制できる。 (J) Since the gap S between the side surface 21 of the battery 20 and the holder 30 is filled with the resin 40, the battery 20 and the holder 30 can be electrically insulated even if the holder 30 is made of metal. it can. Moreover, transfer of heat between the battery 20 and the holder 30 can be suppressed.

（Ｋ）電池２０と金型６０の変更を伴わずにホルダ３０の電池保持用穴３１の径を変えるだけで、隙間Ｓの容積を変化させた製品を作ることができる。そのため、隙間Ｓの容量の設計変更が容易である。 (K) By changing the diameter of the battery holding hole 31 of the holder 30 without changing the battery 20 and the mold 60, a product in which the volume of the gap S is changed can be produced. Therefore, the design change of the capacity of the gap S is easy.

（Ｌ）はみ出し部４１の一部が、ホルダ３０の、電池２０の周方向と直交する方向の両側に回り込んでいるため、樹脂４０がホルダ３０から剥がれても、はみ出し部４１の前記一部がホルダ３０に引っかかり樹脂４０がホルダ３０から脱落することを抑制できる。 (L) Since a part of the protruding part 41 wraps around both sides of the holder 30 in the direction orthogonal to the circumferential direction of the battery 20, the part of the protruding part 41 even if the resin 40 is peeled off from the holder 30. It is possible to prevent the resin 40 from being caught by the holder 30 and falling off from the holder 30.

１０ 電池保持構造
２０ 電池
２１ 電池の側面
３０ ホルダ
３１ 電池保持用穴
３２ ホルダの電池対向面
４０ 樹脂
４１ はみ出し部
５０ 第１の凹部
５１ 第２の凹部
６０ 金型
６１ 傾斜面
Ｓ 隙間 DESCRIPTION OF SYMBOLS 10 Battery holding structure 20 Battery 21 Battery side surface 30 Holder 31 Battery holding hole 32 Battery holding surface 40 of a holder Resin 41 A protruding part 50 A first recessed part 51 A second recessed part 60 A mold 61 An inclined surface S A gap

Claims (4)

複数個並列に配置される電池を、ホルダにて前記電池の側面で保持する、電池保持構造であって、
前記電池の側面と前記ホルダの前記電池の側面に対向する電池対向面との間の隙間が、該隙間に樹脂を流入して固化させることで、該樹脂で充填されており、
前記電池の側面および／または前記ホルダの電池対向面に、前記隙間の容積を大にする方向に凹む第２の凹部が設けられており、
前記第２の凹部は、該第２の凹部が設けられる面の周方向の一部で、該第２の凹部が設けられる面の周方向と直交する方向に延びて設けられており、前記樹脂で充填されており、
前記第２の凹部は、該第２の凹部が設けられる面の周方向と直交する方向で前記隙間の全体にわたって連続して設けられている、電池保持構造。 A battery holding structure for holding a plurality of batteries arranged in parallel on a side surface of the battery with a holder,
A gap between a side surface of the battery and a battery facing surface of the holder that faces the side surface of the battery is filled with the resin by allowing the resin to flow into the gap and solidify .
A second recess that is recessed in the direction of increasing the volume of the gap is provided on a side surface of the battery and / or a battery facing surface of the holder;
The second recess is a part of the circumferential direction of the surface on which the second recess is provided and extends in a direction perpendicular to the circumferential direction of the surface on which the second recess is provided, and the resin Filled with
The battery holding structure , wherein the second recess is provided continuously over the entire gap in a direction orthogonal to the circumferential direction of the surface on which the second recess is provided . 前記電池の側面および／または前記ホルダの電池対向面に、前記隙間の容積を大にする方向に凹む第１の凹部が設けられており、
前記第１の凹部は、該第１の凹部が設けられる面の周方向と直交する方向の一部で、該第１の凹部が設けられる面の周方向に延びて設けられており、前記樹脂で充填されている、請求項１記載の電池保持構造。 A first recess that is recessed in the direction of increasing the volume of the gap is provided on a side surface of the battery and / or a battery facing surface of the holder;
The first recess is a part of a direction perpendicular to the circumferential direction of the surface on which the first recess is provided and extends in the circumferential direction of the surface on which the first recess is provided, and the resin The battery holding structure according to claim 1, wherein the battery holding structure is filled with . 前記樹脂は、前記隙間から該隙間の外にはみ出すはみ出し部を備える、請求項１または請求項２記載の電池保持構造。 The battery holding structure according to claim 1 , wherein the resin includes a protruding portion that protrudes outside the gap from the gap. 前記はみ出し部のはみ出し量は、前記ホルダから前記電池に近づくにつれて大とされている、請求項３記載の電池保持構造。
The battery holding structure according to claim 3 , wherein an amount of protrusion of the protruding portion is increased as the distance from the holder approaches the battery.
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