JP2021068522A - Battery accommodating unit - Google Patents

Battery accommodating unit Download PDF

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JP2021068522A
JP2021068522A JP2019190961A JP2019190961A JP2021068522A JP 2021068522 A JP2021068522 A JP 2021068522A JP 2019190961 A JP2019190961 A JP 2019190961A JP 2019190961 A JP2019190961 A JP 2019190961A JP 2021068522 A JP2021068522 A JP 2021068522A
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bottom wall
wall
refrigerant flow
side sill
battery accommodating
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JP7116714B2 (en
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吉田　正敏
Masatoshi Yoshida
正敏 吉田
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Kobe Steel Ltd
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Kobe Steel Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

To provide a battery accommodating unit having high waterproofness and a battery cooling function.SOLUTION: A battery accommodating unit includes a container main body 10, a lid 20, an outer bottom wall 32, a cooling body 80, and a side sill connecting member 70. The container body 10 is formed of a deep-drawn product of an aluminum alloy, has a bottom wall 12 and a peripheral wall 14 integrally connected to the bottom wall 12, and accommodates a battery on the bottom wall 12. The lid 20 is mounted on the container main body 10 so as to cover an internal space of the container at a position above the container main body 10. The outer bottom wall 32 is arranged at a position which is spaced downward from the lower surface of the bottom wall 12. The cooling body 80 is arranged between the bottom wall 12 and the outer bottom wall 32 to allow flow of a refrigerant, thereby cooling the bottom wall 12. The side sill connecting member 70 connects the container main body 10 and the side sill 2 and holds the outer bottom wall 32 to maintain the interval between the bottom wall 12 and the outer bottom wall 32.SELECTED DRAWING: Figure 4

Description

本発明は、自動車の車体の下部においてバッテリーを収容するためのバッテリー収容ユニットに関する。 The present invention relates to a battery accommodating unit for accommodating a battery in the lower part of an automobile body.

従来、自動車の車体の下部においてバッテリーを収容するための構造として、特許文献１に記載されるものが知られている。この構造は、底板と、周壁と、天板と、を備える。前記底板は前記車体の下部を構成するサイドシル（特許文献１ではロッカー）に連結されて当該サイドシルにより支持される。前記周壁は、左右側壁部と、前壁部と、後壁部と、を含み、前記底板上で電池（バッテリー）の収容空間を囲むように当該底板上に配置される。前記天板は前記収容空間を覆うように前記周壁に締結される。 Conventionally, a structure described in Patent Document 1 is known as a structure for accommodating a battery in a lower portion of an automobile body. This structure includes a bottom plate, a peripheral wall, and a top plate. The bottom plate is connected to a side sill (rocker in Patent Document 1) constituting the lower part of the vehicle body and supported by the side sill. The peripheral wall includes left and right side wall portions, a front wall portion, and a rear wall portion, and is arranged on the bottom plate so as to surround a storage space for a battery (battery) on the bottom plate. The top plate is fastened to the peripheral wall so as to cover the accommodation space.

前記構造では、自動車全体の軽量化のため、前記底板、前記周壁及び前記天板のそれぞれがアルミニウム合金等の軽金属により成形される。具体的に、前記底板は、アルミニウム合金等からなる板材であってプレス成形されたものにより構成される。前記周壁を構成する前記左右側壁部、前記前壁部及び前記後壁部のそれぞれは、アルミニウム合金等により中空断面を有するように押出成形された押出形材により構成され、前記底壁に溶接等の手段で固定される。 In the structure, the bottom plate, the peripheral wall, and the top plate are each molded of a light metal such as an aluminum alloy in order to reduce the weight of the entire automobile. Specifically, the bottom plate is made of a plate material made of an aluminum alloy or the like and is press-molded. Each of the left and right side wall portions, the front wall portion, and the rear wall portion constituting the peripheral wall is made of an extruded shape member extruded so as to have a hollow cross section with an aluminum alloy or the like, and is welded to the bottom wall or the like. It is fixed by the means of.

特開２００７−３１３４２６号公報Japanese Unexamined Patent Publication No. 2007-31426

前記のように自動車の下部においてバッテリーを収容する構造には、前記軽量化の他、バッテリー収容空間内への水の浸入を阻止する防水性が求められる。しかし、前記特許文献１に記載される構造では、前記天板、前記左右側壁部、前記前壁部及び前記後壁部が互いに別の部材として構成されているので、その部材同士の隙間からバッテリー収容空間内に水が浸入しやすく、当該水の浸入を阻止するためには複雑なシール構造をそれぞれの部材同士の間に与えなければならない。また、前記バッテリーは発熱体であるため、前記の防水性を確保しながら当該バッテリーを有効に冷却することが望まれる。 As described above, the structure for accommodating the battery in the lower part of the automobile is required to have the above-mentioned weight reduction and waterproofness to prevent water from entering the battery accommodating space. However, in the structure described in Patent Document 1, since the top plate, the left and right side wall portions, the front wall portion, and the rear wall portion are configured as separate members, the battery is formed through a gap between the members. Water easily enters the containment space, and a complicated sealing structure must be provided between the members in order to prevent the ingress of water. Further, since the battery is a heating element, it is desired to effectively cool the battery while ensuring the waterproof property.

本発明は、前記の事情に鑑み、複雑な構造を要することなく高い防水性を確保しながらバッテリーの有効な冷却が可能なバッテリー収容ユニットを提供することを目的とする。 In view of the above circumstances, it is an object of the present invention to provide a battery accommodating unit capable of effectively cooling a battery while ensuring high waterproofness without requiring a complicated structure.

提供されるのは、自動車の車体の下部においてバッテリーを収容するためのバッテリー収容ユニットであって、アルミニウム合金からなる深絞り成形品により構成され、底壁及びこれと一体につながって容器内空間の少なくとも一部を囲む周壁を有し、前記底壁の上に前記バッテリーを収容する容器本体と、前記容器本体の上側の位置で前記容器内空間を覆うように前記容器本体に装着される蓋と、前記底壁から下方に離れた位置に配置される外部底壁と、前記底壁と前記外部底壁との間に配置され、冷媒の流通を許容しながら当該冷媒と前記底壁とを熱交換させて当該底壁を冷却する冷却体と、前記車体の左右方向において前記容器本体の外側に位置するサイドシルと前記容器本体との間に介在するサイドシル連結部材と、を備える。前記サイドシル連結部材は、前記容器本体が当該サイドシル連結部材を介して前記サイドシルに支持されるように当該容器本体及び当該サイドシルにそれぞれ連結される容器連結部及びサイドシル連結部と、前記底壁と前記外部底壁との間隔を保つように当該外部底壁を保持する外部底壁保持部と、を有する。 Provided is a battery accommodating unit for accommodating the battery in the lower part of the car body, which is composed of a deep drawn molded product made of an aluminum alloy, and is integrally connected to the bottom wall and the space inside the container. A container body having at least a peripheral wall and accommodating the battery on the bottom wall, and a lid attached to the container body so as to cover the space inside the container at a position above the container body. , The outer bottom wall is arranged at a position downward from the bottom wall, and is arranged between the bottom wall and the outer bottom wall, and heats the refrigerant and the bottom wall while allowing the flow of the refrigerant. A cooling body that is exchanged to cool the bottom wall, and a side sill connecting member that is interposed between the side sill located outside the container body in the left-right direction of the vehicle body and the container body are provided. The side sill connecting member includes a container body, a container connecting portion and a side sill connecting portion connected to the side sill so that the container body is supported by the side sill via the side sill connecting member, and the bottom wall and the side sill connecting member. It has an outer bottom wall holding portion that holds the outer bottom wall so as to maintain a distance from the outer bottom wall.

このバッテリー収容ユニットでは、アルミニウム合金からなる深絞り成形品により容器本体が構成されることにより当該容器本体の底壁と周壁とが一体につながっているので、前記底壁と前記周壁とが互いに別の部材で構成される容器と異なり、複雑なシール構造を要することなく高い防水性を確保することができる。 In this battery accommodating unit, the bottom wall and the peripheral wall of the container body are integrally connected by forming the container body with a deep-drawn molded product made of an aluminum alloy, so that the bottom wall and the peripheral wall are separated from each other. Unlike the container made of the above members, high waterproofness can be ensured without requiring a complicated sealing structure.

さらに、前記冷却体が冷媒の流通を許容しながら当該冷媒と前記底壁との間で熱交換を行わせることにより、当該底壁及びその上に収容されるバッテリーを有効に冷却することができる。しかも、前記冷却体は前記容器本体の外部に配置されているので、容器本体の内部に冷却機構が設けられる態様と異なり、当該容器本体に冷媒流通用の穴等を設ける必要がない。このことは、当該容器本体の高い防水性を確保しながら前記底壁を通じて前記バッテリーを有効に冷却することを可能にする。そして、このように冷却体が容器本体の外部に配置されながらも、前記容器本体を自動車のサイドシルに連結するためのサイドシル連結部材を有効に利用して前記底壁の下面と前記外部底壁との上下方向の間隔を保つことにより、路面から前記外部底壁に加わる外力が前記底壁及び前記冷却体に作用するのを有効に抑止して当該底壁及び当該冷却体を有効に保護することができる。すなわち、前記外部底壁及び前記サイドシル連結部材は、（１）前記容器本体の高い防水性と、（２）これに収容されるバッテリーの有効な冷却と、（３）当該冷却のための冷却体及びこれが配置される容器本体の底壁の有効な保護と、（４）前記サイドシルによるバッテリー容器の支持と、を簡単な構造で同時に実現することを可能にする。 Further, by allowing the cooling body to exchange heat between the refrigerant and the bottom wall while allowing the flow of the refrigerant, the bottom wall and the battery housed on the bottom wall can be effectively cooled. .. Moreover, since the cooling body is arranged outside the container body, it is not necessary to provide a hole or the like for refrigerant flow in the container body, unlike the mode in which the cooling mechanism is provided inside the container body. This makes it possible to effectively cool the battery through the bottom wall while ensuring high waterproofness of the container body. Then, while the cooling body is arranged outside the container body in this way, the lower surface of the bottom wall and the outer bottom wall can be effectively used by effectively utilizing the side sill connecting member for connecting the container body to the side sill of the automobile. By maintaining the vertical distance between the two, the external force applied to the outer bottom wall from the road surface is effectively suppressed from acting on the bottom wall and the cooling body, and the bottom wall and the cooling body are effectively protected. Can be done. That is, the outer bottom wall and the side sill connecting member are (1) highly waterproof of the container body, (2) effective cooling of the battery housed therein, and (3) a cooling body for the cooling. It is possible to simultaneously realize the effective protection of the bottom wall of the container body in which the container body is arranged and (4) the support of the battery container by the side sill with a simple structure.

前記冷却体は、前記底壁の下面から離間した位置に設けられて当該底壁からの輻射熱を奪うものでもよいが、好ましくは、当該底壁と熱伝導可能となるように当該底壁の下面に取付けられることが、好ましい。このことは、当該冷却体と前記底壁との間の直接的な熱伝導によって当該底壁及びその上のバッテリーをより有効に冷却することを可能にする。 The cooling body may be provided at a position separated from the lower surface of the bottom wall to take radiant heat from the bottom wall, but preferably, the lower surface of the bottom wall can conduct heat with the bottom wall. It is preferable that it is attached to. This makes it possible to cool the bottom wall and the battery on it more effectively by direct heat conduction between the cooling body and the bottom wall.

深絞り成形品により構成される前記容器本体には成形性に優れた５０００系アルミニウム合金を採用する一方、当該容器本体に比べて複雑な形状が求められない外部底壁には５０００系アルミニウム合金よりも成形性は低いが強度の高い６０００系アルミニウム合金からなる板材を採用することが可能である。このことは、前記容器本体にその成形のために５０００系アルミニウム合金を採用しながら、当該容器本体の底壁の上に配置されるバッテリーを有効に保護することを可能にする。 A 5000 series aluminum alloy with excellent moldability is used for the container body made of a deeply drawn product, while a 5000 series aluminum alloy is used for the outer bottom wall, which does not require a complicated shape as compared with the container body. However, it is possible to use a plate material made of a 6000 series aluminum alloy having low formability but high strength. This makes it possible to effectively protect the battery arranged on the bottom wall of the container body while adopting a 5000 series aluminum alloy for the molding of the container body.

前記バッテリー収容ユニットは、前記底壁と前記外部底壁との間に介在して当該底壁と当該外部底壁との間隔を保つ外部補強部をさらに備えることが、好ましい。当該外部補強材の具備は、前記底壁の下面及び前記冷却体と前記外部底壁との間隔をより確実に保って当該底壁及び当該冷却体をより確実に保護することを可能にする。 It is preferable that the battery accommodating unit further includes an external reinforcing portion that is interposed between the bottom wall and the external bottom wall to maintain a distance between the bottom wall and the external bottom wall. The provision of the external reinforcing material makes it possible to more reliably protect the bottom wall and the cooling body by maintaining a more reliable distance between the lower surface of the bottom wall and the cooling body and the external bottom wall.

前記冷却体は、それぞれが前記底壁の下面に沿った特定の冷媒流通方向に延びて当該冷媒流通方向への前記冷媒の流通を許容する複数の冷媒流通部を含み、当該複数の冷媒流通部が前記冷媒流通方向と直交する方向に間隔をおいて配置されているものが、好適である。このような複数の冷媒流通部を含む前記冷却体は、前記底壁及びその上に収容されるバッテリーを広い範囲にわたって高い均一性で冷却することが可能である。 The cooling body includes a plurality of refrigerant flow units, each extending in a specific refrigerant flow direction along the lower surface of the bottom wall to allow the flow of the refrigerant in the refrigerant flow direction, and the plurality of refrigerant flow units. Are preferably arranged at intervals in a direction orthogonal to the refrigerant flow direction. The cooling body including the plurality of refrigerant flow sections can cool the bottom wall and the battery housed on the bottom wall with high uniformity over a wide range.

この場合、前記外部補強部は、それぞれが前記冷媒流通方向と平行な長手方向に延びる複数の外部補強材を含み、当該複数の外部補強材のそれぞれが前記複数の冷媒流通部を前記冷媒流通方向と直交する方向であって前記底壁の下面に沿う方向にまたぎながら当該冷媒流通部の両側の位置で前記底壁の下面に接合されているものが、好適である。当該複数の外部補強材は、互いに隣り合う冷媒流通部同士の間の空間を利用して前記底壁の下面に接合されながら前記複数の冷媒流通部のそれぞれを直接的にかつ有効に保護することが可能である。 In this case, each of the external reinforcing members includes a plurality of external reinforcing materials extending in a longitudinal direction parallel to the refrigerant flow direction, and each of the plurality of external reinforcing materials causes the plurality of refrigerant flow sections to flow in the refrigerant flow direction. It is preferable that the refrigerant is joined to the lower surface of the bottom wall at positions on both sides of the refrigerant flow portion while straddling the direction perpendicular to the lower surface of the bottom wall. The plurality of external reinforcing materials shall directly and effectively protect each of the plurality of refrigerant flow sections while being joined to the lower surface of the bottom wall by utilizing the space between the refrigerant flow sections adjacent to each other. Is possible.

具体的に、前記複数の外部補強材のそれぞれは、前記複数の冷媒流通部のそれぞれの両側の位置で前記長手方向に延びて前記底壁の下面と対向しかつ接触可能な第１対向部及び第２対向部と、前記複数の冷媒流通部のそれぞれの下方の位置で前記長手方向に延びて前記外部底壁の上面と対向しかつ接触可能な中間対向部と、前記中間対向部と前記第１対向部とを上下方向に連結する第１連結部と、前記中間対向部と前記第２対向部とを上下方向に連結する第２連結部と、を含むものが、好適である。このような外部補強材は、上下方向の圧縮荷重に対して高い剛性を有することにより、前記複数の冷媒流通部のそれぞれをより確実に保護することが可能である。 Specifically, each of the plurality of external reinforcing materials extends in the longitudinal direction at positions on both sides of each of the plurality of refrigerant flow portions, and faces and is in contact with the lower surface of the bottom wall. A second facing portion, an intermediate facing portion extending in the longitudinal direction at a position below each of the plurality of refrigerant flow portions and facing and contacting the upper surface of the outer bottom wall, the intermediate facing portion and the first It is preferable that the first connecting portion for connecting the 1 facing portion in the vertical direction and the second connecting portion for connecting the intermediate facing portion and the second facing portion in the vertical direction are included. Since such an external reinforcing material has high rigidity against a compressive load in the vertical direction, it is possible to more reliably protect each of the plurality of refrigerant flow sections.

前記冷媒流通方向及び前記複数の外部補強材の前記長手方向は、前記車体の前後方向と平行な方向であることが、好ましい。このことは、車両の走行中に車体の前後方向の成分を含む荷重が前記外部補強材に作用したときの当該外部補強材の変形を抑制することを可能にする。 It is preferable that the refrigerant flow direction and the longitudinal direction of the plurality of external reinforcing members are parallel to the front-rear direction of the vehicle body. This makes it possible to suppress the deformation of the external reinforcing material when a load including a component in the front-rear direction of the vehicle body acts on the external reinforcing material while the vehicle is traveling.

前記のような断面形状を有する外部補強材は７０００系アルミニウム合金からなる押出形材により構成されることが可能である。７０００系アルミニウム合金は、高い強度を有する反面、比較的応力腐食割れが生じやすい特性を有するが、当該外部補強材は前記外部底壁の内側（上側）に配置されていて外部の水分と直接接触することが防がれるので、前記外部補強材が７０００系アルミニウム合金からなるものであるにもかかわらずその応力腐食割れを有効に抑止することができる。 The external reinforcing material having the cross-sectional shape as described above can be composed of an extruded shape material made of a 7000 series aluminum alloy. Although the 7000 series aluminum alloy has high strength, it has a property that stress corrosion cracking is relatively likely to occur. However, the external reinforcing material is arranged inside (upper side) of the outer bottom wall and comes into direct contact with external moisture. Therefore, even though the external reinforcing material is made of a 7000 series aluminum alloy, its stress corrosion cracking can be effectively suppressed.

前記サイドシル連結部材は、前記サイドシルに対して前記車体の左右方向の内向きに作用する衝撃荷重により圧壊して当該衝撃荷重を吸収するように左右方向に並ぶ複数の閉断面を有するのが、好ましい。当該サイドシル連結部材は、前記容器本体を前記サイドシルに連結する連結部材及び前記外部底壁を保持する保持部材としての機能に加えて当該サイドシルに加えられる衝撃荷重を吸収する補強部材としての機能を保有することができる。 It is preferable that the side sill connecting member has a plurality of closed cross sections arranged in the left-right direction so as to crush the side sill by an impact load acting inward in the left-right direction of the vehicle body and absorb the impact load. .. The side sill connecting member has a function as a connecting member for connecting the container body to the side sill and a function as a holding member for holding the outer bottom wall, and also as a reinforcing member for absorbing an impact load applied to the side sill. can do.

前記外部底壁保持部が前記複数の閉断面を含む前記サイドシル連結部材の本体部から下方に突出し、前記サイドシル連結部材は前記本体部に加えられた前記車体の左右方向の内向きの荷重を前記外部底壁保持部に伝達するように前記本体部において前記外部底壁保持部よりも前記車体の左右方向の外側の部位と前記外部底壁保持部の下端とを連結する荷重伝達部をさらに含むことが好ましい。当該荷重伝達部は、側方から前記サイドシル連結部材に加わる荷重を前記容器本体と前記外部底壁とに分散させて当該容器本体内のバッテリーをより有効に保護することを可能にする。 The outer bottom wall holding portion projects downward from the main body portion of the side sill connecting member including the plurality of closed cross sections, and the side sill connecting member applies an inward load in the left-right direction of the vehicle body applied to the main body portion. The main body further includes a load transmitting portion that connects a portion outside the vehicle body in the left-right direction and the lower end of the external bottom wall holding portion so as to transmit to the external bottom wall holding portion. Is preferable. The load transmitting portion makes it possible to more effectively protect the battery in the container body by distributing the load applied to the side sill connecting member from the side to the container body and the outer bottom wall.

以上のように、本発明によれば、複雑な構造を要することなく高い防水性を確保しながらバッテリーを有効に冷却することが可能なバッテリー収容ユニットが提供される。 As described above, according to the present invention, there is provided a battery accommodating unit capable of effectively cooling a battery while ensuring high waterproofness without requiring a complicated structure.

本発明の実施の形態に係るバッテリー収容ユニットの一部断面斜視図である。It is a partial cross-sectional perspective view of the battery accommodating unit which concerns on embodiment of this invention. 前記実施の形態に係るバッテリー収容ユニットの容器本体及び内部補強材を示す平面図である。It is a top view which shows the container main body and the internal reinforcing material of the battery accommodating unit which concerns on the said Embodiment. 前記実施の形態に係る容器本体の底隅部及びその周辺部分を斜め下方から見た斜視図である。It is a perspective view which looked at the bottom corner part and the peripheral part of the container body which concerns on the said Embodiment from diagonally below. 前記実施の形態に係るバッテリー収容ユニットの要部を示す断面図であって当該要部の車体の左右方向に沿った断面を示す正面図である。FIG. 5 is a cross-sectional view showing a main part of the battery accommodating unit according to the embodiment, and is a front view showing a cross section of the main part along the left-right direction of the vehicle body. 図４のＶ−Ｖ線に沿った断面を示す側面図である。It is a side view which shows the cross section along the VV line of FIG. 前記実施の形態に係るバッテリー収容ユニットの冷却体の断面平面図である。It is sectional drawing of the cooling body of the battery accommodating unit which concerns on the said Embodiment.

以下、本発明の好ましい実施の形態について図面を参照しながら説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

図１〜図６は、本発明の実施の形態に係るバッテリー収容ユニットを示す。このバッテリー収容ユニットは、自動車の車体の下部に図２に示されるバッテリー４を収容するものであって、図１に示される容器本体１０、蓋２０、複数の内部補強材５０、複数のクロスメンバー６０、外部底壁３２、冷却体８０、複数の外部補強材９０、及び一対のサイドシル連結部材７０を備える。 1 to 6 show a battery accommodating unit according to an embodiment of the present invention. This battery accommodating unit accommodates the battery 4 shown in FIG. 2 in the lower part of the vehicle body of the automobile, and has a container body 10, a lid 20, a plurality of internal reinforcing members 50, and a plurality of cross members shown in FIG. 60, an outer bottom wall 32, a cooling body 80, a plurality of external reinforcing members 90, and a pair of side sill connecting members 70.

前記バッテリー収容ユニットは、前記車体の下部を構成する左右のサイドシル２同士の間に配置される。前記左右のサイドシル２は、例えばドアピラーの下方の位置で前後方向に延びるように配置される。 The battery accommodating unit is arranged between the left and right side sills 2 that form the lower part of the vehicle body. The left and right side sills 2 are arranged so as to extend in the front-rear direction at a position below the door pillar, for example.

前記容器本体１０は、上向きに開口する形状を有し、前記蓋２０とともに、前記バッテリー４を収容するためのバッテリー容器を構成する。前記バッテリー４は、この実施の形態では複数のバッテリーモジュール６により構成される。それぞれのバッテリーモジュール６は複数のバッテリーセルの集合体である。前記バッテリー容器は、前記複数のバッテリーモジュール６が水平方向に配列された状態でこれらを収容する。 The container body 10 has a shape that opens upward, and together with the lid 20, constitutes a battery container for accommodating the battery 4. The battery 4 is composed of a plurality of battery modules 6 in this embodiment. Each battery module 6 is an aggregate of a plurality of battery cells. The battery container accommodates the plurality of battery modules 6 in a horizontally arranged state.

前記容器本体１０は、アルミニウム合金からなる深絞り成形品により構成される。具体的に、この実施の形態に係る前記容器本体１０は、底壁１２と周壁１４とを一体に有するように、アルミニウム合金の中では成形性に優れた５０００系アルミニウム合金によって深絞り成形されたものである。前記容器本体１０は、より好ましくは、５０００系アルミニウム合金の中でも特に成形性に優れた５０００系Ｏ調質材からなる深絞り成形品により構成される。前記容器本体１０は、あるいは、６０００系アルミニウム合金、例えば６０００系Ｔ４調質材、により構成されてもよい。前記のように底壁１２と周壁１４とが一体に連続する深絞り成形品からなる容器本体１０は、従来のように底壁と周壁とが別部材で構成されるものと異なり、複雑なシール構造を要することなく高い防水性を有すること、すなわち、当該容器本体１０内への水の浸入を防ぐこと、が可能である。 The container body 10 is made of a deep-drawn molded product made of an aluminum alloy. Specifically, the container body 10 according to this embodiment is deep-drawn by a 5000 series aluminum alloy having excellent moldability among aluminum alloys so as to have a bottom wall 12 and a peripheral wall 14 integrally. It is a thing. The container body 10 is more preferably composed of a deep-drawn molded product made of a 5000-series O-treated material, which is particularly excellent in moldability among 5000-series aluminum alloys. The container body 10 may also be made of a 6000 series aluminum alloy, for example, a 6000 series T4 tempering material. As described above, the container body 10 made of a deep-drawn molded product in which the bottom wall 12 and the peripheral wall 14 are integrally continuous is a complicated seal unlike the conventional one in which the bottom wall and the peripheral wall are made of separate members. It is possible to have high waterproofness without requiring a structure, that is, to prevent water from entering the container body 10.

前記底壁１２は平板状をなし、略矩形の平面形状を有する。前記容器本体１０は、前記底壁１２が略水平となる姿勢で前記車体に組み込まれる。具体的には、前記一対のサイドシル連結部材７０を介して前記右及び左サイドシル２に取付けられる。 The bottom wall 12 has a flat plate shape and has a substantially rectangular planar shape. The container body 10 is incorporated into the vehicle body in a posture in which the bottom wall 12 is substantially horizontal. Specifically, it is attached to the right and left side sill 2 via the pair of side sill connecting members 70.

前記周壁１４は、前記底壁１２の周縁から上向きに立ち上がるように当該底壁１２と一体につながる。当該周壁１４は、前記底壁１２の上方の空間であって平面視で略矩形状の容器内空間の下半部を囲む形状を有する。具体的に、当該周壁１４は、右側壁１４ａ、左側壁１４ｂ、前側壁１４ｆ及び後側壁１４ｒを一体に有する。前記右側壁１４ａ及び前記左側壁１４ｂは、前記車体の左右方向について前記容器内空間の右側及び左側にそれぞれ位置して前記車体の前後方向に延びる。前記前側壁１４ｆ及び前記後側壁１４ｒは、前記車体の前後方向について前記容器内空間の前側及び後側にそれぞれ位置して前記車体の左右方向に延びる。 The peripheral wall 14 is integrally connected to the bottom wall 12 so as to rise upward from the peripheral edge of the bottom wall 12. The peripheral wall 14 has a shape that surrounds the lower half of the space above the bottom wall 12 and is substantially rectangular in a plan view. Specifically, the peripheral wall 14 integrally has a right side wall 14a, a left side wall 14b, a front side wall 14f, and a rear side wall 14r. The right side wall 14a and the left side wall 14b are located on the right side and the left side of the container inner space in the left-right direction of the vehicle body and extend in the front-rear direction of the vehicle body. The front side wall 14f and the rear side wall 14r are located on the front side and the rear side of the container inner space in the front-rear direction of the vehicle body, respectively, and extend in the left-right direction of the vehicle body.

前記周壁１４は、複数の隅部を有する。当該複数の隅部は、この実施の形態では、右前隅部１４ｆａ、左前隅部１４ｆｂ、右後隅部１４ｒａ及び左後隅部１４ｒｂであり、それぞれが前記容器本体１０の深さ寸法だけ、すなわち前記周壁１４の高さ寸法だけ、上下方向に延びる。前記右前隅部１４ｆａは前記前側壁１４ｆと前記右側壁１４ａとの境界部分であり、当該右前隅部１４ｆａにおいて前記前側壁１４ｆの右端部と前記右側壁１４ａの前端部とが一体につながる。前記左前隅部１４ｆｂは前記前側壁１４ｆと前記左側壁１４ｂとの境界部分であり、当該左前隅部１４ｆｂにおいて前記前側壁１４ｆの左端部と前記左側壁１４ｂの前端部とが一体につながる。前記右後隅部１４ｒａは前記後側壁１４ｒと前記右側壁１４ａとの境界部分であり、当該右後隅部１４ｒａにおいて前記後側壁１４ｒの右端部と前記右側壁１４ａの後端部とが一体につながる。前記左後隅部１４ｒｂは前記後側壁１４ｒと前記左側壁１４ｂとの境界部分であり、当該左後隅部１４ｒｂにおいて前記後側壁１４ｒの左端部と前記左側壁１４ｂの後端部とが一体につながる。 The peripheral wall 14 has a plurality of corners. In this embodiment, the plurality of corners are the right front corner 14fa, the left front corner 14fb, the right rear corner 14ra, and the left rear corner 14rb, each of which is only the depth dimension of the container body 10, that is, It extends in the vertical direction by the height dimension of the peripheral wall 14. The right front corner portion 14fa is a boundary portion between the front side wall 14f and the right side wall 14a, and at the right front corner portion 14fa, the right end portion of the front side wall 14f and the front end portion of the right side wall 14a are integrally connected. The left front corner portion 14fb is a boundary portion between the front side wall 14f and the left side wall 14b, and the left end portion of the front side wall 14f and the front end portion of the left side wall 14b are integrally connected at the left front corner portion 14fb. The right rear corner portion 14ra is a boundary portion between the rear side wall 14r and the right side wall 14a, and in the right rear corner portion 14ra, the right end portion of the rear side wall 14r and the rear end portion of the right side wall 14a are integrally formed. Connect. The left rear corner portion 14rb is a boundary portion between the rear side wall 14r and the left side wall 14b, and the left end portion of the rear side wall 14r and the rear end portion of the left side wall 14b are integrally formed at the left rear corner portion 14rb. Connect.

また、前記容器本体１０は、前記底壁１２の周縁と前記周壁１４の下縁との境界部分である底壁周縁境界部１３を有する。当該底壁周縁境界部１３は、前記底壁１２の右縁と前記右側壁１４ａとの境界部分と、前記底壁１２の左縁と前記左側壁１４ｂとの境界部分と、前記底壁１２の前縁と前記前側壁１４ｆとの境界部分と、前記底壁１２の後縁と前記後側壁１４ｒとの境界部分と、を含む。前記バッテリー４は前記底壁１２の上面上に載置されるようにして前記バッテリー容器に収容される。 Further, the container body 10 has a bottom wall peripheral edge boundary portion 13 which is a boundary portion between the peripheral edge of the bottom wall 12 and the lower edge of the peripheral wall 14. The bottom wall peripheral boundary portion 13 includes a boundary portion between the right edge of the bottom wall 12 and the right side wall 14a, a boundary portion between the left edge of the bottom wall 12 and the left side wall 14b, and the bottom wall 12. It includes a boundary portion between the front edge and the front side wall 14f, and a boundary portion between the trailing edge of the bottom wall 12 and the rear side wall 14r. The battery 4 is housed in the battery container so as to be placed on the upper surface of the bottom wall 12.

前記容器本体１０では、当該容器本体１０の深絞り成形の際に皺や破断が生じることを回避するために、前記複数の隅部１４ｆａ，１４ｆｂ，１４ｒａ，１４ｒｂ及び前記底壁周縁境界部１３にＲ形状が与えられる。すなわち、当該複数の隅部１４ｆａ，１４ｆｂ，１４ｒａ，１４ｒｂ及び前記底壁周縁境界部１３の内側面が外向きに凸の曲面となるように容器本体１０が成形されている。前記曲面の曲率半径は、前記深絞り成形の条件に応じて設定される。特に、前記複数の隅部１４ｆａ，１４ｆｂ，１４ｒａ，１４ｒｂのそれぞれの下端と前記底壁周縁境界部１３の四隅との接続部分、換言すれば、前記隅部１４ｆａ，１４ｆｂ，１４ｒａ，１４ｒｂの下端部、である容器底隅部１５（図３）にはさらに大きな曲率半径が与えられる。図３は前記容器底隅部のうち前記右後隅部１４ｒａの下端部に相当する容器底隅部１５を示している。 In the container body 10, in order to avoid wrinkles and breakage during deep drawing of the container body 10, the plurality of corners 14fa, 14fb, 14ra, 14rb and the bottom wall peripheral boundary portion 13 are formed. An R shape is given. That is, the container body 10 is formed so that the plurality of corner portions 14fa, 14fb, 14ra, 14rb and the inner side surface of the bottom wall peripheral boundary portion 13 have an outwardly convex curved surface. The radius of curvature of the curved surface is set according to the conditions of the deep drawing molding. In particular, the connecting portions between the lower ends of the plurality of corner portions 14fa, 14fb, 14ra, and 14rb and the four corners of the bottom wall peripheral boundary portion 13, in other words, the lower end portions of the corner portions 14fa, 14fb, 14ra, and 14rb. A larger radius of curvature is given to the bottom corner 15 (FIG. 3) of the container. FIG. 3 shows the container bottom corner portion 15 corresponding to the lower end portion of the right rear corner portion 14ra of the container bottom corner portion.

前記蓋２０は、前記容器本体１０の上側で前記容器内空間を覆うように当該容器本体１０に装着される。この実施の形態に係る前記蓋２０は、天壁２２と周壁２４とを一体に有する。前記天壁２２は、前記容器本体１０の前記底壁１２の平面形状に対応した平面形状（この実施の形態では略矩形状）を有する。前記周壁２４は、前記容器本体１０の前記周壁１４の平面形状に対応した平面形状（この実施の形態では略矩形状）を有し、前記天壁２２の周縁から下方に突出するように当該周縁と一体につながる。 The lid 20 is attached to the container body 10 so as to cover the space inside the container on the upper side of the container body 10. The lid 20 according to this embodiment has a top wall 22 and a peripheral wall 24 integrally. The top wall 22 has a planar shape (substantially rectangular in this embodiment) corresponding to the planar shape of the bottom wall 12 of the container body 10. The peripheral wall 24 has a planar shape (substantially rectangular shape in this embodiment) corresponding to the planar shape of the peripheral wall 14 of the container body 10, and the peripheral edge so as to project downward from the peripheral edge of the top wall 22. Connect with.

前記蓋２０の周壁２４の下縁部及び前記容器本体１０の前記周壁１４の上縁部からはそれぞれ外向きにフランジ部２６，１６が突出し、これらのフランジ部２６，１６が上下方向に互いに突き合わされた状態で互いに着脱可能に結合される。図例では両フランジ部２６，１６同士が図示しないシール材を介して複数のボルト２８により締結される。前記容器内空間は、前記蓋２０の前記天壁２２と前記容器本体１０の前記底壁１２との間の空間であって、前記蓋２０および前記容器本体１０の周壁２４，１４によって囲まれた空間である。 Flange portions 26 and 16 project outward from the lower edge portion of the peripheral wall 24 of the lid 20 and the upper edge portion of the peripheral wall 14 of the container body 10, respectively, and these flange portions 26 and 16 protrude from each other in the vertical direction. In the combined state, they are detachably connected to each other. In the illustrated example, both flange portions 26, 16 are fastened to each other by a plurality of bolts 28 via a sealing material (not shown). The space inside the container is a space between the top wall 22 of the lid 20 and the bottom wall 12 of the container body 10, and is surrounded by the lid 20 and the peripheral walls 24 and 14 of the container body 10. It is a space.

前記蓋２０の材質は特に限定されない。当該蓋２０は、例えば、５０００系アルミニウム合金、好ましくは５０００系アルミニウム合金のＯ調質材、からなる板材をプレス成形することにより製造されることが可能である。 The material of the lid 20 is not particularly limited. The lid 20 can be manufactured, for example, by press-molding a plate material made of a 5000 series aluminum alloy, preferably a 5000 series aluminum alloy O-treated material.

前記複数の内部補強材５０は、前記底壁１２の上側で前記周壁１４の内側に当該周壁１４に沿うように配置され、これにより前記バッテリー容器を内側から補強する。当該複数の内部補強材５０のそれぞれは、一方向に直線状に延びる形状を有し、前記容器本体１０に固定される。好ましくは、前記周壁１４の内側面及び前記底壁１２の上面に溶接等の手段で接合される。 The plurality of internal reinforcing members 50 are arranged above the bottom wall 12 and inside the peripheral wall 14 along the peripheral wall 14, thereby reinforcing the battery container from the inside. Each of the plurality of internal reinforcing members 50 has a shape extending linearly in one direction and is fixed to the container body 10. Preferably, it is joined to the inner side surface of the peripheral wall 14 and the upper surface of the bottom wall 12 by means such as welding.

この実施の形態に係る前記複数の内部補強材５０は、右内部補強材５０Ａ、左内部補強材５０Ｂ、前内部補強材５０Ｆ及び後内部補強材５０Ｒを含む。前記右内部補強材５０Ａは前記右側壁１４ａに沿うように当該右側壁１４ａの内側すなわち左側に配置される。前記左内部補強材５０Ｂは前記左側壁１４ｂに沿うように当該左側壁１４ｂの内側すなわち右側に配置される。前記前内部補強材５０Ｆは前記前側壁１４ｆに沿うように当該前側壁１４ｆの内側すなわち後側に配置される。前記後内部補強材５０Ｒは前記後側壁１４ｒに沿うように当該後側壁１４ｒの内側すなわち前側に配置される。以下の説明において、「複数の内部補強材５０」は前記右内部補強材５０Ａ、前記左内部補強材５０Ｂ、前記前内部補強材５０Ｆ及び前記後内部補強材５０Ｒの総称として用いられる。 The plurality of internal reinforcing members 50 according to this embodiment include a right internal reinforcing member 50A, a left internal reinforcing member 50B, a front internal reinforcing member 50F, and a rear internal reinforcing member 50R. The right internal reinforcing member 50A is arranged inside the right side wall 14a, that is, on the left side along the right side wall 14a. The left internal reinforcing member 50B is arranged inside the left side wall 14b, that is, on the right side so as to be along the left side wall 14b. The front internal reinforcing member 50F is arranged inside, that is, on the rear side of the front side wall 14f so as to be along the front side wall 14f. The rear internal reinforcing member 50R is arranged inside, that is, on the front side of the rear side wall 14r so as to be along the rear side wall 14r. In the following description, "plurality of internal reinforcing materials 50" is used as a general term for the right internal reinforcing material 50A, the left internal reinforcing material 50B, the front internal reinforcing material 50F, and the rear internal reinforcing material 50R.

前記複数の内部補強材５０のそれぞれは、前記容器本体１０及び前記蓋２０によって囲まれるバッテリー収容空間Ｓｂに収容されるバッテリー４と前記周壁１４との間に介在するように配置される。換言すれば、前記容器内空間のうち前記複数の内部補強材５０により囲まれる空間が前記バッテリー収容空間Ｓｂを構成する。当該バッテリー収容空間Ｓｂは、前記バッテリー４を構成する前記複数のバッテリーモジュール６が縦横に（車体の前後方向及び左右方向に）配列された状態で当該複数のバッテリーモジュール６を収容することが可能な大きさ及び形状（この実施の形態では平面視略矩形状）を有する。 Each of the plurality of internal reinforcing members 50 is arranged so as to be interposed between the battery 4 accommodated in the battery accommodating space Sb surrounded by the container body 10 and the lid 20 and the peripheral wall 14. In other words, the space in the container space surrounded by the plurality of internal reinforcing members 50 constitutes the battery accommodating space Sb. The battery accommodating space Sb can accommodate the plurality of battery modules 6 in a state in which the plurality of battery modules 6 constituting the battery 4 are arranged vertically and horizontally (in the front-rear direction and the left-right direction of the vehicle body). It has a size and a shape (in this embodiment, a substantially rectangular shape in a plan view).

前記複数の内部補強材５０のそれぞれは、７０００系アルミニウム合金により形成される。好ましくは、前記複数の内部補強材５０Ａ，５０Ｂ，５０Ｆ，５０Ｒのそれぞれは７０００系アルミニウム合金からなる押出形材により構成される。このことは、前記内部補強材５０Ａ，５０Ｂ，５０Ｆ，５０Ｒのそれぞれが特定の長手方向に直線状に延び、かつ、当該長手方向に一様な断面形状を有することを可能にする。このような形状は、前記複数の内部補強材５０のそれぞれが前記周壁１４に沿うようにその内側に効率よく配置され、かつ、当該周壁１４の内側面及び前記底壁１２の上面に接合されることを容易にする。また、前記内部補強材５０Ａ，５０Ｂ，５０Ｆ，５０Ｒの内側に広いバッテリー収容空間Ｓｂを囲みながらこれに収容されるバッテリー４を有効に保護することが可能である。前記内部補強材５０を構成する７０００系アルミニウム合金としては、特に強度の高い（例えば０．２％耐力が３００ＭＰａ以上の）ピーク時効材（Ｔ５調質材）が好ましい。 Each of the plurality of internal reinforcing members 50 is formed of a 7000 series aluminum alloy. Preferably, each of the plurality of internal reinforcing members 50A, 50B, 50F, and 50R is composed of an extruded profile made of a 7000 series aluminum alloy. This makes it possible for each of the internal reinforcing members 50A, 50B, 50F, and 50R to extend linearly in a specific longitudinal direction and have a uniform cross-sectional shape in the longitudinal direction. In such a shape, each of the plurality of internal reinforcing members 50 is efficiently arranged inside the peripheral wall 14 along the peripheral wall 14, and is joined to the inner side surface of the peripheral wall 14 and the upper surface of the bottom wall 12. Make things easier. Further, it is possible to effectively protect the battery 4 accommodated in the internal reinforcing members 50A, 50B, 50F, 50R while surrounding the wide battery accommodating space Sb inside. As the 7000 series aluminum alloy constituting the internal reinforcing material 50, a peak aging material (T5 tempered material) having particularly high strength (for example, 0.2% proof stress of 300 MPa or more) is preferable.

前記のように、７０００系アルミニウム合金は５０００系または６０００系アルミニウム合金に比べて応力腐食割れが生じやすい特性を有するが、前記複数の内部補強材５０は前記のように防水性に優れた容器本体１０の内部に配置されているので、当該複数の内部補強材５０が７０００系アルミニウム合金からなるものであっても、その応力腐食割れを有効に抑止することが可能である。 As described above, the 7000 series aluminum alloy has a characteristic that stress corrosion cracking is more likely to occur than the 5000 series or 6000 series aluminum alloy, but the plurality of internal reinforcing members 50 have excellent waterproofness as described above. Since it is arranged inside the 10, even if the plurality of internal reinforcing members 50 are made of a 7000 series aluminum alloy, the stress corrosion cracking can be effectively suppressed.

前記複数の内部補強材５０のそれぞれは、図４に示すように内部空間を囲む中空断面を有し、具体的には、前記内部空間を囲む外壁５２と、横リブ５４と、を有する。前記外壁５２は、この実施の形態では縦長の略矩形状をなし、前記内部空間の右側、左側、上側及び下側のそれぞれに位置する右壁５２ａ、左壁５２ｂ、上壁５２ｃ及び下壁５２ｄを含む。前記横リブ５４は、前記内部補強材５０の横断面における上下方向中間の高さ位置で前記内部空間を水平方向に横切るように配置され、前記右壁５２ａ及び前記左壁５２ｂの上下方向中間部位にそれぞれつながる両端部を有する。このような中空断面を有する前記内部補強材５０は、車両の軽量化に寄与しながら、上下方向に厚みを有して前記内部空間を水平方向に横切る前記横リブ５４を含むことにより、水平方向の荷重に対して十分耐え得る強度を有することができる。 Each of the plurality of internal reinforcing members 50 has a hollow cross section surrounding the internal space as shown in FIG. 4, and specifically, has an outer wall 52 surrounding the internal space and a lateral rib 54. In this embodiment, the outer wall 52 has a vertically long substantially rectangular shape, and the right wall 52a, the left wall 52b, the upper wall 52c, and the lower wall 52d located on the right side, the left side, the upper side, and the lower side of the internal space, respectively. including. The lateral rib 54 is arranged so as to horizontally cross the internal space at a height position intermediate in the vertical direction in the cross section of the internal reinforcing member 50, and is an intermediate portion in the vertical direction of the right wall 52a and the left wall 52b. Has both ends connected to each. The internal reinforcing member 50 having such a hollow cross section has a thickness in the vertical direction and includes the horizontal rib 54 that horizontally crosses the internal space while contributing to weight reduction of the vehicle, thereby contributing to the horizontal direction. It can have enough strength to withstand the load of.

前記複数の内部補強材５０のそれぞれは、前記バッテリー収容空間Ｓｂの高さ寸法と略同等の高さ寸法を有する。具体的には、前記下壁５２ｄの下面が前記底壁１２の上面に接合され、前記右壁５２ａ及び前記左壁５２ｂのうち容器外側に位置する壁の下半部の外側面が前記容器本体１０の周壁１４の内側面に接合され、この状態で前記内部補強材５０Ａ，５０Ｂ，５０Ｆ，５０Ｒの上半部が前記周壁１４の上端よりも上側に突出する。当該上半部は、前記周壁１４の上端部に装着される前記蓋２０の周壁２４によって包囲される。 Each of the plurality of internal reinforcing members 50 has a height dimension substantially equal to the height dimension of the battery accommodating space Sb. Specifically, the lower surface of the lower wall 52d is joined to the upper surface of the bottom wall 12, and the outer surface of the lower half of the right wall 52a and the left wall 52b located outside the container is the container body. It is joined to the inner surface of the peripheral wall 14 of 10, and in this state, the upper half of the internal reinforcing members 50A, 50B, 50F, 50R protrudes upward from the upper end of the peripheral wall 14. The upper half is surrounded by the peripheral wall 24 of the lid 20 attached to the upper end of the peripheral wall 14.

上述のように、この実施の形態に係るバッテリー収容ユニットでは、深絞り成形品からなる前記容器本体１０の底壁周縁境界部１３にはＲ形状が与えられ、当該底壁周縁境界部１３の内側面は外向きに凸の曲面とされる。この内側面の形状にかかわらず広いバッテリー収容面積を確保するために前記複数の内部補強材５０の下部に特別な形状が与えられる。 As described above, in the battery accommodating unit according to this embodiment, the bottom wall peripheral boundary portion 13 of the container body 10 made of a deep-drawn molded product is given an R shape, and the bottom wall peripheral boundary portion 13 is inside the bottom wall peripheral boundary portion 13. The side surface is an outwardly convex curved surface. A special shape is given to the lower portion of the plurality of internal reinforcing members 50 in order to secure a large battery accommodating area regardless of the shape of the inner surface.

具体的に、前記複数の内部補強材５０のそれぞれにおいて、図４に示すように、前記外壁５２の４つの角部のうち前記底壁周縁境界部１３の内側面に対応する下外側角部の外側面５３には当該内側面と嵌合することが可能となるようなＲ形状が与えられている。図４は、例として、前記容器本体１０の周壁１４のうち右側壁１４ａに沿って配置される右内部補強材５０Ａにおいて右壁５２ａと下壁５２ｄとの境界部分である右下角部の外側面５３を示している。この外側面は、外向きに凸の曲面であって前記底壁周縁境界部１３のうち前記右側壁１４ａと底壁１２との境界の内側面と合致する曲面とされている。 Specifically, in each of the plurality of internal reinforcing members 50, as shown in FIG. 4, of the four corners of the outer wall 52, the lower and outer corners corresponding to the inner side surface of the bottom wall peripheral boundary portion 13. The outer side surface 53 is provided with an R shape that can be fitted with the inner side surface. FIG. 4 shows, as an example, the outer surface of the lower right corner portion which is the boundary portion between the right wall 52a and the lower wall 52d in the right internal reinforcing member 50A arranged along the right side wall 14a of the peripheral wall 14 of the container body 10. 53 is shown. The outer surface is a curved surface that is convex outward and is a curved surface that matches the inner surface of the boundary between the right side wall 14a and the bottom wall 12 of the bottom wall peripheral boundary portion 13.

すなわち、前記複数の内部補強材５０のそれぞれは、前記底壁１２の上面と接合可能な補強材底面（下壁５２ｄの下面）と、周壁１４の内側面と接合可能な補強材外側面（例えば前記右内部補強材５０Ａでは右壁５２ａの外側面）と、前記補強材底面と前記補強材外側面との境界部分を構成して前記底壁周縁境界部の内側面と嵌合することが可能な境界部外側面（例えば前記右内部補強材５０Ａでは前記右下角部の外側面５３）と、を有する。このような形状は、前記底壁周縁境界部１３の曲面形状にかかわらず前記内部補強材５０が底壁１２と周壁１４との双方に接合されることを可能にし、これにより、当該内部補強材５０の内側に広いバッテリー収容空間Ｓｂが確保されることを可能にする。 That is, each of the plurality of internal reinforcing members 50 has a reinforcing material bottom surface (lower surface of the lower wall 52d) that can be joined to the upper surface of the bottom wall 12, and a reinforcing material outer surface (for example, that can be joined to the inner surface of the peripheral wall 14). In the right internal reinforcing material 50A, the outer surface of the right wall 52a) and the boundary portion between the bottom surface of the reinforcing material and the outer surface of the reinforcing material can be formed and fitted with the inner surface of the peripheral boundary portion of the bottom wall. The outer surface of the boundary portion (for example, the outer surface 53 of the lower right corner portion in the right internal reinforcing member 50A). Such a shape enables the internal reinforcing material 50 to be joined to both the bottom wall 12 and the peripheral wall 14 regardless of the curved surface shape of the bottom wall peripheral boundary portion 13, whereby the internal reinforcing material is formed. It is possible to secure a large battery accommodating space Sb inside the 50.

既述のように、前記容器本体１０の深絞り成形時の皺及び破断の回避のため、前記４つの隅部１４ｆａ，１４ｆｂ，１４ｒａ，１４ｒｂと前記底壁周縁境界部１３との境界部分、換言すれば、前記隅部１４ｆａ，１４ｆｂ，１４ｒａ，１４ｒｂの下端部（以下「容器底隅部」と称する。）、である容器底隅部１５（図３）には当該４つの隅部１４ｆａ，１４ｆｂ，１４ｒａ，１４ｒｂの内側面の曲率半径及び前記底壁周縁境界部１３の内側面の曲率半径よりもさらに大きな曲率半径が与えられている。このような４つの容器底隅部の形状に対応するため、図１及び図２に示すように、前記４つの隅部のそれぞれに前記４つの内部補強材５０Ａ，５０Ｂ，５０Ｆ，５０Ｒとは別の４つの隅部補強材５８がそれぞれ配置されている。当該４つの隅部補強材５８は、前記隅部１４ｆａ，１４ｆｂ，１４ｒａ，１４ｒｂの内側面の形状、前記底壁周縁境界部１３の内側面の形状、及び前記容器底隅部の内側面形状にそれぞれ対応した形状をもつ外側面を有する。 As described above, in order to avoid wrinkles and breakage during deep drawing of the container body 10, the boundary portion between the four corner portions 14fa, 14fb, 14ra, 14rb and the bottom wall peripheral edge boundary portion 13, in other words. Then, the four corners 14fa, 14fb are located at the bottom corner 15 (FIG. 3) of the container, which is the lower end of the corners 14fa, 14fb, 14ra, 14rb (hereinafter referred to as “container bottom corner”). , 14ra, 14rb are given a radius of curvature larger than the radius of curvature of the inner surface and the radius of curvature of the inner surface of the bottom wall peripheral boundary portion 13. In order to correspond to the shapes of the four bottom corners of the container, as shown in FIGS. 1 and 2, each of the four corners is separate from the four internal reinforcing members 50A, 50B, 50F, and 50R. The four corner reinforcing members 58 of the above are arranged respectively. The four corner reinforcing members 58 have the shape of the inner surface of the corners 14fa, 14fb, 14ra, 14rb, the shape of the inner surface of the bottom wall peripheral boundary portion 13, and the shape of the inner surface of the bottom corner of the container. Each has an outer surface having a corresponding shape.

なお、前記複数の内部補強材５０は本発明の必須の構成要素ではない。すなわち、当該複数の内部補強材５０は省略されてもよい。例えば、前記周壁１４のすぐ内側に前記内部補強材５０を介さずにバッテリー４が配置されてもよい。 The plurality of internal reinforcing members 50 are not essential components of the present invention. That is, the plurality of internal reinforcing members 50 may be omitted. For example, the battery 4 may be arranged immediately inside the peripheral wall 14 without the internal reinforcing member 50.

前記複数のクロスメンバー６０は、前記バッテリー収容空間Ｓｂ内で縦横に配列される前記複数のバッテリーモジュール６のうち互いに隣り合うバッテリーモジュール６の間に効率的に配置されながら前記複数の内部補強材５０と協働して前記バッテリー容器を内側から有効に補強する。また、当該複数のクロスメンバー６０は、前記バッテリー収容空間Ｓｂを前記複数のバッテリーモジュール６にそれぞれ対応した複数のモジュール収容空間に区画する仕切り部材としても機能し得る。 The plurality of cross members 60 are efficiently arranged between the battery modules 6 adjacent to each other among the plurality of battery modules 6 arranged vertically and horizontally in the battery accommodating space Sb, and the plurality of internal reinforcing members 50. Effectively reinforce the battery container from the inside in cooperation with. Further, the plurality of cross members 60 can also function as a partition member for partitioning the battery accommodating space Sb into a plurality of module accommodating spaces corresponding to the plurality of battery modules 6.

前記複数のクロスメンバー６０のそれぞれは一方向に直線状に延びる形状であって、前記複数の内部補強材５０のそれぞれと近似する断面形状を有する。すなわち、前記複数のクロスメンバー６０のそれぞれは、前記複数の内部補強材５０の高さ寸法と略同等の高さ寸法を有するとともに、内部空間を囲む中空断面を有する。 Each of the plurality of cross members 60 has a shape extending linearly in one direction, and has a cross-sectional shape similar to that of each of the plurality of internal reinforcing members 50. That is, each of the plurality of cross members 60 has a height dimension substantially equal to the height dimension of the plurality of internal reinforcing members 50, and has a hollow cross section surrounding the internal space.

具体的に、前記複数のクロスメンバー６０のそれぞれは、例えば図５に示されるように、前記内部空間を囲む外壁６２と、前記内部空間を水平方向に横切る横リブ６４と、を有する。前記外壁６２は、前記外壁５２と同様に縦長の略矩形状をなし、前記内部空間の右側、左側、上側及び下側のそれぞれに位置する右壁６２ａ、左壁６２ｂ、上壁６２ｃ及び下壁６２ｄを含む。前記横リブ６４は、前記クロスメンバー６０の横断面における上下方向中間の高さ位置で前記内部空間を水平方向に横切るように配置され、前記右壁６２ａ及び前記左壁６２ｂの上下方向中間部位にそれぞれつながる両端部を有する。このような中空断面を有する前記クロスメンバー６０は、車両の軽量化に寄与しながら、上下方向に厚みを有して前記内部空間を水平方向に横切る前記横リブ６４を含むことにより、水平方向の荷重に対して十分耐え得る強度を有することができる。 Specifically, each of the plurality of cross members 60 has an outer wall 62 that surrounds the internal space and a lateral rib 64 that horizontally crosses the internal space, as shown in FIG. 5, for example. The outer wall 62 has a substantially rectangular shape that is vertically long like the outer wall 52, and the right wall 62a, the left wall 62b, the upper wall 62c, and the lower wall located on the right side, the left side, the upper side, and the lower side of the internal space, respectively. Includes 62d. The lateral rib 64 is arranged so as to horizontally cross the internal space at a height position intermediate in the vertical direction in the cross section of the cross member 60, and is arranged at an intermediate portion in the vertical direction of the right wall 62a and the left wall 62b. Each has both ends connected. The cross member 60 having such a hollow cross section is horizontal by including the lateral rib 64 having a thickness in the vertical direction and horizontally crossing the internal space while contributing to weight reduction of the vehicle. It can have sufficient strength to withstand a load.

このように一方向に延びかつ一様断面を有する前記複数のクロスメンバー６０は、前記複数の内部補強材５０と同様、高い強度を有する７０００系アルミニウム合金からなる押出形材により構成されることが可能である。しかも、当該複数のクロスメンバー６０は前記複数の内部補強材５０と同様に前記容器本体１０の内部に配置されるので、７０００系アルミニウム合金からなるものであってもその応力腐食割れを有効に抑止することが可能である。当該複数のクロスメンバー６０のそれぞれにも、特に強度の高い７０００系のピーク時効材を用いることが可能である。 Like the plurality of internal reinforcing members 50, the plurality of cross members 60 extending in one direction and having a uniform cross section may be composed of an extruded profile made of a 7000 series aluminum alloy having high strength. It is possible. Moreover, since the plurality of cross members 60 are arranged inside the container body 10 in the same manner as the plurality of internal reinforcing members 50, stress corrosion cracking is effectively suppressed even if the cross member 60 is made of a 7000 series aluminum alloy. It is possible to do. It is possible to use a particularly high-strength 7000 series peak aging material for each of the plurality of cross members 60.

この実施の形態において、前記複数のバッテリーモジュール６は、図１及び図２に示されるように左右２列で前後に２列よりも多い複数列（図１に示される例では６列）にわたり配列される。この配列に対応して前記複数のクロスメンバー６０は、単数本の縦クロスメンバー６０Ａと、これによりも多い複数の（図１に示される例では５本の）横クロスメンバー６０Ｂとを含む。以下の説明において、「複数のクロスメンバー６０」は前記縦クロスメンバー６０Ａ及び前記複数の横クロスメンバー６０Ｂの総称である。 In this embodiment, the plurality of battery modules 6 are arranged in two rows on the left and right and more than two rows in the front-rear direction (six rows in the example shown in FIG. 1) as shown in FIGS. 1 and 2. Will be done. Corresponding to this arrangement, the plurality of cross members 60 include a single vertical cross member 60A and a larger number of the plurality of horizontal cross members 60B (five in the example shown in FIG. 1). In the following description, "plurality of cross members 60" is a general term for the vertical cross member 60A and the plurality of horizontal cross members 60B.

前記縦クロスメンバー６０Ａは、互いに車体の左右方向に隣り合うバッテリーモジュール６同士の間で車体の前後方向に延びるように配置される。当該縦クロスメンバー６０Ａは、その前後両端部が前記前及び後内部補強材５０Ｆ，５０Ｒの左右方向中間部位の内側面にそれぞれ接触する（好ましくは溶接等により接合される）ことが可能となる長さを有する。 The vertical cross member 60A is arranged so as to extend in the front-rear direction of the vehicle body between the battery modules 6 adjacent to each other in the left-right direction of the vehicle body. The length of the vertical cross member 60A is such that both front and rear ends thereof can come into contact with the inner side surfaces of the front and rear internal reinforcing members 50F and 50R in the left-right direction, respectively (preferably joined by welding or the like). Has

前記複数の横クロスメンバー６０Ｂのそれぞれは、前記縦クロスメンバー６０Ａと右及び左内部補強材５０Ａ，５０Ｂとの間において互いに車体の前後方向に隣り合うバッテリーモジュール６同士の間で車体の左右方向に延びるように配置される。それぞれの横クロスメンバー６０Ｂは、その左右両端部が前記縦クロスメンバー６０Ａの右側面または左側面と前記右内部補強材５０Ａまたは前記左内部補強材５０Ｂとにそれぞれ接触する（好ましくは溶接等により接合される）ことが可能となる長さを有する。 Each of the plurality of horizontal cross members 60B is located in the left-right direction of the vehicle body between the battery modules 6 adjacent to each other in the front-rear direction of the vehicle body between the vertical cross member 60A and the right and left internal reinforcing members 50A and 50B. Arranged to extend. The left and right ends of each of the horizontal cross members 60B are in contact with the right side surface or the left side surface of the vertical cross member 60A and the right internal reinforcing material 50A or the left internal reinforcing material 50B, respectively (preferably joined by welding or the like). Has a length that allows it to be welded.

前記複数のクロスメンバー６０も本発明の必須の構成要素ではない。すなわち、当該複数のクロスメンバー６０は省略されてもよい。例えば、前記複数のバッテリーモジュール６が前記クロスメンバー６０を介さずに互いに直接隣り合うように配列されてもよい。あるいは、単一のモジュールからなるバッテリーがバッテリー収容空間に収容されてもよい。 The plurality of cross members 60 are also not essential components of the present invention. That is, the plurality of cross members 60 may be omitted. For example, the plurality of battery modules 6 may be arranged so as to be directly adjacent to each other without the cross member 60. Alternatively, a battery consisting of a single module may be housed in the battery storage space.

前記外部底壁３２は、前記容器本体１０の外部において前記底壁１２の下面から下方に離れた位置で当該底壁１２の下面を覆うように配置される。 The outer bottom wall 32 is arranged outside the container body 10 so as to cover the lower surface of the bottom wall 12 at a position downward from the lower surface of the bottom wall 12.

前記外部底壁３２は、例えば前記底壁１２の下面と平行な平板により構成される。このように複雑な形状が要求されない外部底壁３２は、５０００系アルミニウム合金のＯ調質材よりも成形性が低くて高い強度を有するアルミニウム合金、例えば５０００系アルミニウム合金のＨ調質材、さらには、５０００系アルミニウム合金よりも成形性は低いが強度の高い６０００系アルミニウム合金からなる板材により構成されることが可能である。これらのことは、前記容器本体１０にその成形のために５０００系アルミニウム合金を採用しながら、当該容器本体１０の底壁１２の上に配置されるバッテリーを有効に保護することを可能にする。 The outer bottom wall 32 is composed of, for example, a flat plate parallel to the lower surface of the bottom wall 12. The outer bottom wall 32, which does not require such a complicated shape, has an aluminum alloy having lower formability and higher strength than the O-treated material of the 5000-series aluminum alloy, for example, the H-treated material of the 5000-series aluminum alloy, and further. Can be composed of a plate material made of a 6000 series aluminum alloy having a lower formability than a 5000 series aluminum alloy but a higher strength. These things make it possible to effectively protect the battery arranged on the bottom wall 12 of the container body 10 while adopting a 5000 series aluminum alloy for the container body 10 for its molding.

前記冷却体８０は、発熱体であるバッテリー４を冷却するためのもので、前記容器本体１０の底壁１２の下面と前記外部底壁３２の上面との間に配置される。当該冷却体８０は、冷媒（例えば冷却水）の流通を許容しながら当該冷媒と前記底壁１２とを熱交換させて当該底壁１２を冷却する。 The cooling body 80 is for cooling the battery 4 which is a heating element, and is arranged between the lower surface of the bottom wall 12 of the container body 10 and the upper surface of the outer bottom wall 32. The cooling body 80 cools the bottom wall 12 by exchanging heat between the refrigerant and the bottom wall 12 while allowing the flow of the refrigerant (for example, cooling water).

この実施の形態に係る冷却体８０は、前記底壁１２の下面と接触するように当該下面に取付けられ、当該底壁１２から当該冷却体８０への熱伝導によって当該底壁１２を冷却する。具体的に、前記冷却体８０は、図６に示すように、複数の冷媒流通部８２と、冷媒分配部８４と、冷媒回収部８６と、を有し、その全体が前記底壁１２の下面に例えば接着、溶接といった手段で接合される。 The cooling body 80 according to this embodiment is attached to the lower surface of the bottom wall 12 so as to be in contact with the lower surface of the bottom wall 12, and cools the bottom wall 12 by heat conduction from the bottom wall 12 to the cooling body 80. Specifically, as shown in FIG. 6, the cooling body 80 has a plurality of refrigerant flow units 82, a refrigerant distribution unit 84, and a refrigerant recovery unit 86, all of which are the lower surface of the bottom wall 12. It is joined by means such as adhesion and welding.

前記複数の冷媒流通部８２のそれぞれは、前記底壁１２の下面に沿った特定の冷媒流通方向に延びて当該冷媒流通方向への前記冷媒の流通を許容する。具体的に、当該冷媒流通部８２は前記冷媒流通方向を長手方向とする長尺な直方体状をなし、その内部に前記長手方向と直交する幅方向に並ぶ複数本の冷媒流通路８２ａが形成されている。当該冷媒流通部８２の一方の端は前記冷媒流通路８２ａ内に冷媒を受け入れる冷媒入口端であり、他方の端は前記冷媒流通路を流れた冷媒を排出する冷媒排出端である。当該複数の冷媒流通部８２は、前記底壁１２の略全域にわたり、前記長手方向と直交する（すなわち前記幅方向と平行な）配列方向に間隔をおいて互いに平行となるように配列されている。 Each of the plurality of refrigerant flow units 82 extends in a specific refrigerant flow direction along the lower surface of the bottom wall 12 and allows the flow of the refrigerant in the refrigerant flow direction. Specifically, the refrigerant flow section 82 has a long rectangular parallelepiped shape with the refrigerant flow direction as the longitudinal direction, and a plurality of refrigerant flow passages 82a arranged in the width direction orthogonal to the longitudinal direction are formed therein. ing. One end of the refrigerant flow section 82 is a refrigerant inlet end that receives the refrigerant in the refrigerant flow passage 82a, and the other end is a refrigerant discharge end that discharges the refrigerant that has flowed through the refrigerant flow passage. The plurality of refrigerant flow units 82 are arranged so as to be parallel to each other at intervals in an arrangement direction orthogonal to the longitudinal direction (that is, parallel to the width direction) over substantially the entire area of the bottom wall 12. ..

前記冷媒分配部８４は、前記複数の冷媒流通部８２のそれぞれの冷媒入口端に冷媒を分配する冷媒分配路８４ａを形成する。具体的に、当該冷媒分配部８４は、前記配列方向と平行に延び、前記複数の冷媒流通部８２の入口端同士を相互に接続するように配置される。当該冷媒分配部８４は前記配列方向に延びる前記冷媒分配路８４ａを囲む中空状をなす。当該冷媒分配部８４は、前記複数の冷媒流通部８２とそれぞれ接合される複数の接合箇所を有し、当該複数の接合箇所のそれぞれに、前記複数の冷媒流通路８２ａと前記冷媒分配路８４ａとをそれぞれ連通するための貫通穴である複数の冷媒分配口８４ｂが形成されている。 The refrigerant distribution unit 84 forms a refrigerant distribution path 84a for distributing the refrigerant to each of the refrigerant inlet ends of the plurality of refrigerant flow units 82. Specifically, the refrigerant distribution unit 84 extends in parallel with the arrangement direction, and is arranged so as to connect the inlet ends of the plurality of refrigerant distribution units 82 to each other. The refrigerant distribution section 84 has a hollow shape surrounding the refrigerant distribution path 84a extending in the arrangement direction. The refrigerant distribution section 84 has a plurality of joint points to be joined to the plurality of refrigerant flow sections 82, and the plurality of refrigerant flow passages 82a and the refrigerant distribution path 84a are provided at each of the plurality of joint points. A plurality of refrigerant distribution ports 84b, which are through holes for communicating with each other, are formed.

前記冷媒回収部８６は、前記複数の冷媒流通部８２のそれぞれの冷媒出口端から冷媒を回収する冷媒回収路８６ａを形成する。具体的に、当該冷媒回収部８６は、前記配列方向と平行に延び、前記複数の冷媒流通部８２の出口端同士を相互に接続するように配置される。当該冷媒回収部８６は前記配列方向に延びる前記冷媒回収路８６ａを囲む中空状をなす。当該冷媒回収部８６は、前記複数の冷媒流通部８２とそれぞれ接合される複数の接合箇所を有し、当該複数の接合箇所のそれぞれに、前記複数の冷媒流通路８２ａと前記冷媒回収路８６ａとをそれぞれ連通するための貫通穴である複数の冷媒回収口８６ｂが形成されている。 The refrigerant recovery unit 86 forms a refrigerant recovery path 86a that recovers the refrigerant from the respective refrigerant outlet ends of the plurality of refrigerant flow units 82. Specifically, the refrigerant recovery unit 86 extends parallel to the arrangement direction and is arranged so as to connect the outlet ends of the plurality of refrigerant flow units 82 to each other. The refrigerant recovery unit 86 has a hollow shape surrounding the refrigerant recovery path 86a extending in the arrangement direction. The refrigerant recovery unit 86 has a plurality of joints to be joined to the plurality of refrigerant flow units 82, and the plurality of refrigerant flow passages 82a and the refrigerant recovery passage 86a are provided at each of the plurality of joints. A plurality of refrigerant recovery ports 86b, which are through holes for communicating with each other, are formed.

前記冷媒分配部８４の入口には図略の冷媒供給源、例えば給水ポンプ、が接続される。当該冷媒供給源から前記冷媒分配部８４に供給された冷媒は前記複数の冷媒流通部８２に分配され、それぞれの冷媒流通部８２の冷媒流通路８２ａを流れる間に前記底壁１２と熱交換した後に前記冷媒回収部８６の冷媒回収路８６ａに合流し、図略のタンクに回収される。 A refrigerant supply source (not shown), for example, a water supply pump, is connected to the inlet of the refrigerant distribution unit 84. The refrigerant supplied from the refrigerant supply source to the refrigerant distribution unit 84 was distributed to the plurality of refrigerant flow units 82, and exchanged heat with the bottom wall 12 while flowing through the refrigerant flow passages 82a of the respective refrigerant flow units 82. Later, it joins the refrigerant recovery path 86a of the refrigerant recovery unit 86 and is recovered in the tank shown in the figure.

前記のような複数の冷媒流通部８２の分散配置は、前記底壁１２及びその上に収容されるバッテリー４を広い範囲にわたって高い均一性で冷却することを可能にする。この実施の形態に係る前記冷却体８０は、前記複数の冷媒流通部８２の長手方向が車体の前後方向と合致し、配列方向が車体の左右方向と合致するように、前記底壁１２に接合される。 The distributed arrangement of the plurality of refrigerant flow units 82 as described above makes it possible to cool the bottom wall 12 and the battery 4 housed on the bottom wall 12 with high uniformity over a wide range. The cooling body 80 according to this embodiment is joined to the bottom wall 12 so that the longitudinal direction of the plurality of refrigerant flow units 82 coincides with the front-rear direction of the vehicle body and the arrangement direction coincides with the left-right direction of the vehicle body. Will be done.

従って、この実施の形態に係る前記外部底壁３２は、前記容器本体１０の外部において前記底壁１２の下面及び前記冷却体８０の双方から下方に離れた位置で当該底壁１２の下面及び当該冷却体８０の双方を覆うように配置される。 Therefore, the outer bottom wall 32 according to this embodiment is the lower surface of the bottom wall 12 and the lower surface of the bottom wall 12 at a position below both the lower surface of the bottom wall 12 and the cooling body 80 outside the container body 10. It is arranged so as to cover both of the cooling bodies 80.

前記複数の外部補強材９０は、前記底壁１２と前記外部底壁３２との間に介在するように配置される外部補強部を構成する。当該複数の外部補強材９０は、前記底壁１２の下面及び前記冷却体８０と前記外部底壁３２との間隔をより確実に保って当該底壁１２及び当該冷却体８０をより確実に保護することを可能にする。 The plurality of external reinforcing members 90 constitute an external reinforcing portion arranged so as to be interposed between the bottom wall 12 and the external bottom wall 32. The plurality of external reinforcing members 90 more reliably protect the bottom wall 12 and the cooling body 80 by maintaining a more reliable distance between the lower surface of the bottom wall 12 and the cooling body 80 and the outer bottom wall 32. Make it possible.

前記複数の外部補強材９０は、それぞれが前記冷媒流通方向と平行な長手方向に延び、当該複数の外部補強材９０のそれぞれが前記複数の冷媒流通部８２を前記配列方向、すなわち前記冷媒流通方向と直交する方向であって前記底壁１２の下面に沿う方向、にまたぎながら当該冷媒流通部８２の両側の位置で前記底壁１２の下面に接合される。この外部補強材９０の形状は、当該外部補強材９０が互いに隣り合う冷媒流通部同士の間の空間を利用して前記底壁１２の下面に接合されながら前記複数の冷媒流通部８２のそれぞれを直接的にかつ有効に保護することを、可能にする。 Each of the plurality of external reinforcing members 90 extends in a longitudinal direction parallel to the refrigerant flow direction, and each of the plurality of external reinforcing members 90 arranges the plurality of refrigerant flow portions 82 in the arrangement direction, that is, the refrigerant flow direction. It is joined to the lower surface of the bottom wall 12 at positions on both sides of the refrigerant flow portion 82 while straddling the direction perpendicular to and along the lower surface of the bottom wall 12. The shape of the external reinforcing member 90 is such that the external reinforcing member 90 is joined to the lower surface of the bottom wall 12 by utilizing the space between the refrigerant flow sections adjacent to each other, and each of the plurality of refrigerant flow sections 82 is joined. Allows for direct and effective protection.

具体的に、前記複数の外部補強材９０のそれぞれは、第１対向部である右側対向部９１と、第２対向部である左側対向部９２と、中間対向部９４と、第１連結部である右側連結部９５と、第２連結部である左側連結部９６と、を一体に有する。前記右側及び左側対向部９１，９２は、前記複数の冷媒流通部８２のそれぞれの前記配列方向の両側の位置、この実施の形態では右側及び左側の位置、でそれぞれ前記長手方向に延びて前記底壁１２の下面と対向しかつ接触する（好ましくは溶接等の手段で接合される）ことが可能な上面を有する。前記中間対向部９４は、前記複数の冷媒流通部８２のそれぞれの下方の位置で前記長手方向に延びて前記外部底壁３２の上面と対向しかつ接触する（好ましくは溶接等の手段で接合される）ことが可能な下面を有する。前記右側連結部９５は、前記中間対向部９４の端部（この実施の形態では右側端部）と前記右側対向部９１の内側端部（この実施の形態では左側端部）とを上下方向に連結する。前記左側連結部９６は、前記中間対向部９４の端部（この実施の形態では左側端部）と前記左側対向部９２の内側端部（この実施の形態では右側端部）とを上下方向に連結する。また、前記右側及び左側対向部９１，９２のそれぞれには、当該右側及び左側対向部９１，９２の上側を前記冷媒分配部８４及び前記冷媒回収部８６が横切ることを許容するための凹み９８が形成されている。 Specifically, each of the plurality of external reinforcing members 90 is a first facing portion, a right facing portion 91, a second facing portion, a left facing portion 92, an intermediate facing portion 94, and a first connecting portion. A certain right side connecting portion 95 and a left side connecting portion 96 which is a second connecting portion are integrally provided. The right side and left side facing portions 91 and 92 extend in the longitudinal direction at positions on both sides of the plurality of refrigerant flow parts 82 in the arrangement direction, respectively, at positions on the right side and left side in this embodiment, and the bottom thereof. It has an upper surface capable of facing and contacting the lower surface of the wall 12 (preferably joined by means such as welding). The intermediate facing portion 94 extends in the longitudinal direction at a position below each of the plurality of refrigerant flow portions 82 and faces and contacts the upper surface of the outer bottom wall 32 (preferably joined by means such as welding). Has a lower surface that can be welded. The right side connecting portion 95 vertically connects the end portion of the intermediate facing portion 94 (the right end portion in this embodiment) and the inner end portion of the right facing portion 91 (the left end portion in this embodiment). Link. The left side connecting portion 96 vertically connects the end portion of the intermediate facing portion 94 (the left end portion in this embodiment) and the inner end portion of the left facing portion 92 (the right end portion in this embodiment). Link. Further, each of the right and left facing portions 91 and 92 has a recess 98 for allowing the refrigerant distribution section 84 and the refrigerant recovery section 86 to cross the upper side of the right and left facing portions 91 and 92, respectively. It is formed.

以上のような形状を有する前記外部補強材９０は、上下方向の圧縮荷重に対して高い剛性を有することにより、前記複数の冷媒流通部８２のそれぞれをより確実に保護することが可能である。さらに、当該外部補強材９０の中間対向部９４と前記冷媒流通部８２との間にスペーサが介在してもよい。このスペーサは、前記冷媒流通部８２から前記中間対向部９４への冷熱の直接的な移動を抑止するために断熱材で構成されていることが、好ましい。 The external reinforcing member 90 having the above-mentioned shape has high rigidity against a compressive load in the vertical direction, so that each of the plurality of refrigerant flow units 82 can be more reliably protected. Further, a spacer may be interposed between the intermediate facing portion 94 of the external reinforcing member 90 and the refrigerant flow portion 82. The spacer is preferably made of a heat insulating material in order to suppress the direct transfer of cold heat from the refrigerant flow portion 82 to the intermediate facing portion 94.

さらに、前記のような断面形状を有する外部補強材９０は、アルミニウム合金の中でも強度の高い７０００系アルミニウム合金からなる押出形材により構成されることが可能である。このことは、前記複数の外部補強材９０のそれぞれに高い強度及び剛性を与えることを可能にする。７０００系アルミニウム合金は、反面、比較的応力腐食割れが生じやすい特性を有するが、前記複数の外部補強材９０はいずれも前記外部底壁３２の内側（上側）に配置されていて外部の水分と直接接触することが防がれるので、前記外部補強材９０が７０００系アルミニウム合金により構成されていてもその応力腐食割れを有効に抑止することが可能である。 Further, the external reinforcing member 90 having the cross-sectional shape as described above can be composed of an extruded profile made of a 7000 series aluminum alloy having a high strength among aluminum alloys. This makes it possible to impart high strength and rigidity to each of the plurality of external reinforcing members 90. On the other hand, the 7000 series aluminum alloy has a property that stress corrosion cracking is relatively likely to occur, but all of the plurality of external reinforcing members 90 are arranged inside (upper side) of the outer bottom wall 32 and with external moisture. Since direct contact is prevented, stress corrosion cracking can be effectively suppressed even if the external reinforcing member 90 is made of a 7000 series aluminum alloy.

この実施の形態において、前記冷媒流通方向及び前記長手方向、つまり前記複数の冷媒流通部８２及び前記複数の外部補強材９０が延びる方向は、前記車体の前後方向と平行な方向である。 In this embodiment, the refrigerant flow direction and the longitudinal direction, that is, the directions in which the plurality of refrigerant flow sections 82 and the plurality of external reinforcing members 90 extend are parallel to the front-rear direction of the vehicle body.

前記外部補強部は、前記複数の外部補強材９０に代えて単一の外部補強材により構成されることも可能である。当該単一の外部補強材は、例えば、前記底壁１２の下面のうち前記冷却体８０が配置されずに露出している部分と前記外部底壁３２の上面とに交互に接触するような波状の板材により構成されることが可能である。 The external reinforcing member may be formed of a single external reinforcing member instead of the plurality of external reinforcing members 90. The single external reinforcing material has, for example, a wavy shape in which a portion of the lower surface of the bottom wall 12 where the cooling body 80 is not arranged and exposed and the upper surface of the outer bottom wall 32 are alternately contacted. It is possible to be composed of the plate material of.

前記一対のサイドシル連結部材７０は、前記容器本体１０と車体の左右方向について当該容器本体１０の両外側にそれぞれ位置する前記左右のサイドシル２との間にそれぞれ介在するように配置され、前記容器本体１０が当該一対のサイドシル連結部材７０を介して前記左右のサイドシル２に支持されるように当該容器本体１０を当該サイドシル２に連結する。 The pair of side sill connecting members 70 are arranged so as to be interposed between the container body 10 and the left and right side sill 2 located on both outer sides of the container body 10 in the left-right direction of the vehicle body. The container body 10 is connected to the side sill 2 so that the 10 is supported by the left and right side sill 2 via the pair of side sill connecting members 70.

この実施の形態に係る前記サイドシル連結部材７０は、前記サイドシル２に対して前記車体の左右方向の内向きに作用する衝撃荷重により圧壊して当該荷重を吸収するように前記左右方向に並ぶ複数の（図例では４つの）閉断面７６を有する。当該複数の閉断面７６のそれぞれは、この実施の形態では矩形状の内部空間を囲む形状を有する。このような構造を有する前記サイドシル連結部材７０は、前記バッテリー容器が前記サイドシル２に支持されることを可能にする支持部材としての機能に加え、前記衝撃荷重を吸収して前記バッテリー容器及びこれに収容されるバッテリー４を有効に保護する補強部材として機能することが可能である。 The side sill connecting member 70 according to this embodiment is crushed by an impact load acting inward in the left-right direction of the vehicle body with respect to the side sill 2, and a plurality of side sill connecting members 70 are arranged in the left-right direction so as to absorb the load. It has a closed cross section 76 (four in the example). Each of the plurality of closed cross sections 76 has a shape surrounding a rectangular internal space in this embodiment. The side sill connecting member 70 having such a structure has a function as a support member that enables the battery container to be supported by the side sill 2, and also absorbs the impact load to the battery container and the battery container. It can function as a reinforcing member that effectively protects the housed battery 4.

具体的に、前記サイドシル連結部材７０は、上外壁７１と、下外壁７２と、内側外壁７３と、外側外壁７４と、少なくとも一つの、好ましくは複数の（図例では３つの）、縦リブ７５と、を含む。 Specifically, the side sill connecting member 70 includes an upper outer wall 71, a lower outer wall 72, an inner outer wall 73, and an outer outer wall 74, and at least one, preferably a plurality (three in the example), vertical ribs 75. And, including.

前記上下外壁７１，７２は、上下方向に間隔をおいて互いに平行となる姿勢で配置され、それぞれは水平方向、この実施の形態では車体の左右方向、に延びる水平壁であって横壁である。当該上下外壁７１，７２のそれぞれは、車体の左右方向の両端部、すなわち、前記容器本体１０に近い側の端部である内側端部と、その反対側の端部であって前記サイドシル２に近い側の端部である外側端部と、を有する。前記内側端部は、右側のサイドシル連結部材７０では左側端部、左側のサイドシル連結部材７０では右側端部であり、前記外側端部は、右側のサイドシル連結部材７０では右側端部、左側のサイドシル連結部材７０では左側端部である。 The upper and lower outer walls 71 and 72 are arranged in a posture in which they are parallel to each other at intervals in the vertical direction, and each is a horizontal wall and a horizontal wall extending in the horizontal direction, in the left and right direction of the vehicle body in this embodiment. Each of the upper and lower outer walls 71 and 72 is attached to both ends of the vehicle body in the left-right direction, that is, the inner end portion which is the end portion on the side close to the container body 10 and the end portion on the opposite side to the side sill 2. It has an outer end, which is a near end. The inner end is the left end of the right side sill connecting member 70 and the right end of the left side sill connecting member 70, and the outer end is the right end of the right side sill connecting member 70 and the left side sill. It is the left end portion of the connecting member 70.

前記内側外壁７３は前記上下外壁７１，７２の内側端部同士を上下方向に連結するように当該内側端部と一体につながり、前記外側外壁７４は前記上下外壁７１，７２の外側端部同士を上下方向に連結するように当該外側端部と一体につながる。前記複数の縦リブ７５は、前記内側外壁７３と前記外側外壁７４との間で左右方向に略等間隔に並ぶ複数の位置にそれぞれ配され、当該位置における前記上外壁７１の部位と前記下外壁７２の部位とを上下方向に連結するように当該上下外壁７１，７２と一体につながる。 The inner outer wall 73 is integrally connected to the inner end so as to connect the inner ends of the upper and lower outer walls 71 and 72 in the vertical direction, and the outer outer wall 74 connects the outer ends of the upper and lower outer walls 71 and 72 to each other. It is integrally connected to the outer end so as to be connected in the vertical direction. The plurality of vertical ribs 75 are respectively arranged at a plurality of positions arranged at substantially equal intervals in the left-right direction between the inner outer wall 73 and the outer outer wall 74, and the portion of the upper outer wall 71 and the lower outer wall at the positions are arranged. It is integrally connected to the upper and lower outer walls 71 and 72 so as to connect the 72 parts in the vertical direction.

従って、この実施の形態に係る前記サイドシル連結部材７０においては、前記上下外壁７１，７２からなる一対の横材と、前記内側外壁７３、前記外側外壁７４及び前記複数の縦リブ７５の中から選ばれる２つの縦材と、によって前記複数の閉断面７６のそれぞれが構成される。例えば、車体の左右方向について最も内側の閉断面７６は、前記内側外壁７３と、これに隣り合う縦リブ７５と、当該内側外壁７３と当該縦リブ７５との間の前記上外壁７１の部位と、当該内側外壁７３と当該縦リブ７５との間の前記下外壁７２の部位と、により構成される。 Therefore, in the side sill connecting member 70 according to this embodiment, the side sill connecting member 70 is selected from the pair of cross-section members composed of the upper and lower outer walls 71 and 72, the inner outer wall 73, the outer outer wall 74, and the plurality of vertical ribs 75. Each of the plurality of closed cross sections 76 is formed by the two vertical members. For example, the innermost closed cross section 76 in the left-right direction of the vehicle body includes the inner outer wall 73, the vertical ribs 75 adjacent thereto, and the portion of the upper outer wall 71 between the inner outer wall 73 and the vertical ribs 75. , The portion of the lower outer wall 72 between the inner outer wall 73 and the vertical rib 75.

図示される前記サイドシル連結部材７０では、前記上下外壁７１，７２のうち前記複数の閉断面７６のそれぞれを構成する部位の肉厚が車体の左右方向の外側から内側に向かうに従って順に小さくなっている。すなわち、当該上下外壁７１，７２は、前記縦材とつながる複数の位置をそれぞれ境界として、車体左右方向の外側から内側に向かうに従って段階的に小さくなる肉厚を有する。前記サイドシル連結部材７０において衝撃荷重を受けることにより変形が生じる領域は、衝突面に近い側（車体左右方向の外側）で最も狭く、車体左右方向の外側から内側に向かうに従って広くなるので、前記のような肉厚配分は、前記車体の左右方向の内向きに作用する衝撃荷重によって前記サイドシル連結部材７０が均等に圧壊するのを助ける。すなわち、前記複数の閉断面のうち最も外側の閉断面よりもその内側の閉断面の方が変形範囲が広くなるため、当該閉断面に実際に加わる荷重は外側から内側に向かうに従って低くなるので、当該外側から当該内側に向かうに従って前記上下外壁７１，７２の肉厚を小さくすることが、前記変形の進行に伴う前記荷重の極端な増加を防ぎ、これにより、サイドシル連結部材７０を比較的一定に近い荷重で圧壊変形させることを可能にする。 In the side sill connecting member 70 shown in the drawing, the wall thickness of the portion of the upper and lower outer walls 71 and 72 that constitutes each of the plurality of closed cross sections 76 becomes smaller in order from the outside to the inside in the left-right direction of the vehicle body. .. That is, the upper and lower outer walls 71 and 72 have a wall thickness that gradually decreases from the outside to the inside in the left-right direction of the vehicle body, with the plurality of positions connected to the vertical members as boundaries. The region in which the side sill connecting member 70 is deformed by receiving an impact load is the narrowest on the side close to the collision surface (outside in the left-right direction of the vehicle body) and widens from the outside to the inside in the left-right direction of the vehicle body. Such a wall thickness distribution helps the side sill connecting member 70 to be evenly crushed by an impact load acting inward in the left-right direction of the vehicle body. That is, since the deformation range of the inner closed section is wider than that of the outermost closed section among the plurality of closed sections, the load actually applied to the closed section decreases from the outside to the inside. Reducing the wall thickness of the upper and lower outer walls 71 and 72 from the outside toward the inside prevents an extreme increase in the load as the deformation progresses, thereby making the side sill connecting member 70 relatively constant. It enables crushing deformation with a close load.

前記サイドシル連結部材７０の具体的な材質は限定されないが、軽量のアルミニウム合金であることが好ましい。特に、圧縮性に優れかつ７０００系の中では比較的耐応力腐食割れ性に優れた７０００系の過時効材（Ｔ７調質材）や、さらに耐応力腐食割れ性に優れた６０００系の押出形材が好適である。 The specific material of the side sill connecting member 70 is not limited, but a lightweight aluminum alloy is preferable. In particular, the 7000 series superaging material (T7 tempered material), which has excellent compressibility and relatively excellent stress corrosion cracking resistance among the 7000 series, and the 6000 series extruded type, which has further excellent stress corrosion cracking resistance. The material is suitable.

車体の左右方向について、前記サイドシル連結部材７０の内側端部は前記容器本体１０に連結される容器連結部を構成し、外側端部は前記サイドシル２に連結されるサイドシル連結部を構成する。具体的に、前記サイドシル連結部材７０の内側端部は、前記容器本体１０の前記フランジ部１６に例えば前記ボルト２８を利用して締結され、外側端部は同様にして前記サイドシル２の適当な部位に締結される。 In the left-right direction of the vehicle body, the inner end portion of the side sill connecting member 70 constitutes a container connecting portion connected to the container body 10, and the outer end portion constitutes a side sill connecting portion connected to the side sill 2. Specifically, the inner end portion of the side sill connecting member 70 is fastened to the flange portion 16 of the container body 10 by using, for example, the bolt 28, and the outer end portion is similarly an appropriate portion of the side sill 2. Is fastened to.

この実施の形態において、前記容器本体１０に対する前記右及び左サイドシル連結部材７０の高さ方向すなわち車体の上下方向についての相対位置は、図４に示されるように、下記の条件（ａ）及び（ｂ）を満たすように設定されている。
（ａ）前記右及び左サイドシル連結部材７０において上下方向に厚みを有しかつ車体の左右方向に延びる横材である上外壁７１及び下外壁７２のいずれか一方（この実施の形態では上外壁７１）の上下方向の肉厚領域の少なくとも一部が、前記右及び左内部補強材５０Ａ，５０Ｂにおいて上下方向に厚みを有しかつ車体の左右方向に延びる横材である前記横リブ５４及び下壁５２ｄのいずれか一方（この実施の形態では横リブ５４）の上下方向の肉厚領域の少なくとも一部と重なる程度まで、当該右及び左内部補強材５０Ａ，５０Ｂの横リブ５４の高さ位置と当該上外壁７１の高さ位置とが合致する。
（ｂ）前記複数のクロスメンバー６０において上下方向に厚みを有しかつ水平方向に延びる水平壁である上壁６２ｃ、下壁６２ｄ及び横リブ６４の上下方向の肉厚領域の少なくとも一部が前記複数の内部補強材５０のうち当該クロスメンバー６０の端部が接触する内部補強材５０の水平壁である上壁５２ｃ、下壁５２ｄ及び横リブ５４の上下方向の肉厚領域の少なくとも一部と重なる程度まで、それぞれの水平壁の高さ位置が互いに合致する。 In this embodiment, the relative positions of the right and left side sill connecting members 70 with respect to the container body 10 in the height direction, that is, in the vertical direction of the vehicle body are the following conditions (a) and (as shown in FIG. It is set to satisfy b).
(A) One of the upper outer wall 71 and the lower outer wall 72 (in this embodiment, the upper outer wall 71) which is a cross member having a thickness in the vertical direction and extending in the left and right direction of the vehicle body in the right and left side sill connecting members 70 ) In the right and left internal reinforcing members 50A and 50B, at least a part of the wall thickness region in the vertical direction is a horizontal member having a thickness in the vertical direction and extending in the left-right direction of the vehicle body. With the height position of the lateral ribs 54 of the right and left internal reinforcing members 50A and 50B to the extent that they overlap with at least a part of the vertical wall thickness region of any one of the 52d (horizontal ribs 54 in this embodiment). The height position of the upper outer wall 71 matches.
(B) At least a part of the vertical wall thickness region of the upper wall 62c, the lower wall 62d, and the lateral rib 64, which are horizontal walls having a thickness in the vertical direction and extending in the horizontal direction, in the plurality of cross members 60. Of the plurality of internal reinforcing members 50, at least a part of the vertical wall thickness region of the upper wall 52c, the lower wall 52d, and the lateral rib 54, which are the horizontal walls of the internal reinforcing member 50 to which the ends of the cross member 60 come into contact with each other. The height positions of the horizontal walls match each other to the extent that they overlap.

前記条件（ａ）の充足は、サイドシル２からサイドシル連結部材７０に加えられた水平方向の荷重が前記内部補強材５０の横リブ５４に良好に伝達されることを可能にして当該荷重に対して有効に対抗することを可能にする。また、前記条件（ｂ）の充足は、前記クロスメンバー６０の横リブ６４と当該クロスメンバー６０に接触する内部補強材５０の横リブ５４との間での良好な荷重の伝達を可能にし、これにより当該クロスメンバー６０を補強材として有効に機能させることができる。 Satisfaction of the condition (a) enables the horizontal load applied from the side sill 2 to the side sill connecting member 70 to be satisfactorily transmitted to the lateral rib 54 of the internal reinforcing member 50 with respect to the load. Allows you to effectively counter. Further, the satisfaction of the condition (b) enables good load transmission between the lateral rib 64 of the cross member 60 and the lateral rib 54 of the internal reinforcing member 50 in contact with the cross member 60. Therefore, the cross member 60 can be effectively functioned as a reinforcing material.

以上の効果を得るためには必ずしも前記条件（ａ）及び（ｂ）が同時に充足されていなくてもよい。当該条件（ａ）及び（ｂ）のうちのいずれか一方のみが充足されている場合でもその充足された条件に対応する効果が得られる。 In order to obtain the above effects, the above conditions (a) and (b) do not necessarily have to be satisfied at the same time. Even when only one of the conditions (a) and (b) is satisfied, the effect corresponding to the satisfied conditions can be obtained.

さらに、この実施の形態に係る前記一対のサイドシル連結部材７０は、図４に示すように、前記複数の閉断面７６を構成する本体部（つまり前記上下外壁７１，７２、前記内側外壁７３、外側外壁７４、及び前記複数の縦リブ７５を有する部分）に加え、外部底壁保持部７７、荷重伝達壁７８及び斜め補強壁７９を有する。 Further, as shown in FIG. 4, the pair of side sill connecting members 70 according to this embodiment has a main body portion (that is, the upper and lower outer walls 71, 72, the inner outer wall 73, and the outer side) constituting the plurality of closed cross sections 76. In addition to the outer wall 74 and the portion having the plurality of vertical ribs 75), it has an outer bottom wall holding portion 77, a load transmission wall 78, and an oblique reinforcing wall 79.

前記外部底壁保持部７７は、前記本体部の下面（この実施の形態では前記下外壁７２の内側端部の下面）から下方に突出し、前記外部底壁３２と連結されることにより当該外部底壁３２を保持する。具体的に、車両の左右方向について、右サイドシル連結部材７０の外部底壁保持部７７は前記外部底壁３２の右側端部を保持し、左サイドシル連結部材７０の外部底壁保持部７７は前記外部底壁３２の左側端部を保持する。すなわち、前記一対のサイドシル連結部材７０によって前記外部底壁３２の左右両端部が保持される。これにより、当該外部底壁３２は前記底壁１２の下面から下方に離れた位置で当該底壁１２と平行な姿勢に保たれる。 The outer bottom wall holding portion 77 projects downward from the lower surface of the main body portion (lower surface of the inner end portion of the lower outer wall 72 in this embodiment) and is connected to the outer bottom wall 32 to form the outer bottom. Hold the wall 32. Specifically, in the left-right direction of the vehicle, the outer bottom wall holding portion 77 of the right side sill connecting member 70 holds the right end portion of the outer bottom wall 32, and the outer bottom wall holding portion 77 of the left side sill connecting member 70 is said. Holds the left end of the outer bottom wall 32. That is, the left and right ends of the outer bottom wall 32 are held by the pair of side sill connecting members 70. As a result, the outer bottom wall 32 is maintained in a posture parallel to the bottom wall 12 at a position downward from the lower surface of the bottom wall 12.

この実施の形態に係る外部底壁保持部７７は、基壁７７ａ及び端壁７７ｂを有する。前記基壁７７ａは、前記本体部の内側端部からさらに下方に突出するように鉛直方向に延びる。図４に示される例では、前記基壁７７ａは前記内側外壁７３からさらに下方に延長された部分である。前記端壁７７ｂは、前記基壁７７ａの下端と一体につながり、当該下端から車両の左右方向の内向き（図４では左向き）に突出する。この端壁７７ｂの上に前記外部底壁３２の左右方向の端部が載せられ、当該端壁７７ｂに締結具その他の手段で固定されることにより、外部底壁保持部７７に保持される。 The outer bottom wall holding portion 77 according to this embodiment has a base wall 77a and an end wall 77b. The base wall 77a extends in the vertical direction so as to project further downward from the inner end portion of the main body portion. In the example shown in FIG. 4, the base wall 77a is a portion extending further downward from the inner outer wall 73. The end wall 77b is integrally connected to the lower end of the base wall 77a, and projects inward (leftward in FIG. 4) in the left-right direction of the vehicle from the lower end. The left-right end portion of the outer bottom wall 32 is placed on the end wall 77b and fixed to the end wall 77b by a fastener or other means, so that the outer bottom wall 32 is held by the outer bottom wall holding portion 77.

このような前記外部底壁保持部７７による前記外部底壁３２の保持は、前記一対のサイドシル連結部材７０が前記容器本体１０の底壁１２の下面と前記外部底壁３２との上下方向の間隔を保持する側壁としても機能することを可能にする。 In such holding of the outer bottom wall 32 by the outer bottom wall holding portion 77, the pair of side sill connecting members 70 are vertically spaced from the lower surface of the bottom wall 12 of the container body 10 and the outer bottom wall 32. Allows it to also function as a side wall to hold.

前記荷重伝達壁７８は、前記本体部に加えられた前記車体の左右方向の内向きの荷重を前記外部底壁保持部７７に伝達するように前記本体部において前記外部底壁保持部７７よりも車体左右方向の外側の部位と前記外部底壁保持部７７の下端とを連結する。具体的に、この実施の形態に係る前記荷重伝達壁７８は図４に示すような斜壁部７８ａ及び連結部７８ｂを一体に有する。前記斜壁部７８ａは、前記下外壁７２の下面において前記内側端部から外側に離れた位置から前記外部底壁保持部７７に近づく斜め下向きに延びる。前記連結部７８ｂは、前記斜壁部７８ａと前記外部底壁保持部７７の適当な部位（図４に示される例では前記基壁７７ａの下端部）とを車体の左右方向に連結する。この荷重伝達壁７８は、側方から前記サイドシル連結部材７０に加わる荷重を前記容器本体１０と前記外部底壁３２とに分散させて当該容器本体１０内のバッテリーをより有効に保護することを可能にする。 The load transmission wall 78 is more than the outer bottom wall holding portion 77 in the main body portion so as to transmit the lateral inward load of the vehicle body applied to the main body portion to the outer bottom wall holding portion 77. The outer portion in the left-right direction of the vehicle body and the lower end of the outer bottom wall holding portion 77 are connected. Specifically, the load transmission wall 78 according to this embodiment integrally has an inclined wall portion 78a and a connecting portion 78b as shown in FIG. The slanted wall portion 78a extends diagonally downward toward the outer bottom wall holding portion 77 from a position on the lower surface of the lower outer wall 72 away from the inner end portion. The connecting portion 78b connects the inclined wall portion 78a and an appropriate portion of the external bottom wall holding portion 77 (the lower end portion of the base wall 77a in the example shown in FIG. 4) in the left-right direction of the vehicle body. The load transmission wall 78 can disperse the load applied to the side sill connecting member 70 from the side to the container body 10 and the outer bottom wall 32 to more effectively protect the battery in the container body 10. To.

前記斜め補強壁７９は、前記複数の閉断面７６から選ばれる適当な閉断面（図４に示す例では内側から２番目の閉断面７６）を対角方向に横切って前記荷重伝達壁７８と前記上外壁７１とを接続する。 The diagonal reinforcing wall 79 diagonally crosses an appropriate closed cross section (second closed cross section 76 from the inside in the example shown in FIG. 4) selected from the plurality of closed cross sections 76, and the load transmission wall 78 and the said. It is connected to the upper outer wall 71.

この実施の形態に係るバッテリー収容ユニットでは、容器本体１０がアルミニウム合金からなる深絞り成形品により構成されることにより、高い防水性を確保することができる。そして、前記容器本体１０の底壁１２の下面と前記外部底壁３２との間に配置された冷却体８０により、前記容器本体１０の高い防水性を保ちながら前記底壁１２及びその上に収容されるバッテリー４を有効に冷却することができる。すなわち、このバッテリー収容ユニットでは、前記容器本体１０の外部に冷却体８０が配置されているので、容器本体内部に冷却機構が設けられる態様と異なり、当該容器本体１０に冷媒流通用の穴等を設ける必要がなく、当該穴等の加工によるシール性の低下を回避することが可能である。 In the battery accommodating unit according to this embodiment, the container body 10 is made of a deep-drawn molded product made of an aluminum alloy, so that high waterproofness can be ensured. Then, the cooling body 80 arranged between the lower surface of the bottom wall 12 of the container body 10 and the outer bottom wall 32 accommodates the bottom wall 12 and the bottom wall 12 while maintaining high waterproofness of the container body 10. The battery 4 to be used can be effectively cooled. That is, in this battery accommodating unit, since the cooling body 80 is arranged outside the container body 10, unlike the mode in which the cooling mechanism is provided inside the container body 10, the container body 10 is provided with a hole for refrigerant flow or the like. It is not necessary to provide the hole, and it is possible to avoid deterioration of the sealing property due to processing of the hole or the like.

さらに、このように冷却体８０が容器本体１０の外部に配置されながらも、当該冷却体８０及び当該底壁１２の下面を覆うように外部底壁３２が当該底壁１２のさらに下方に配置され、かつ、前記容器本体１０を自動車のサイドシル２に連結するためのサイドシル連結部材７０を有効に利用して前記冷却体８０及び前記底壁１２の下面と前記外部底壁との上下方向の間隔を保つことにより、前記底壁１２の下方に外部保護空間Ｓｅを確保して路面から前記外部底壁３２に加わる外力が前記底壁１２及び前記冷却体８０に作用するのを有効に抑止することができる。このことは、当該底壁１２及び当該冷却体８０を有効に保護することを可能にする。すなわち、この実施の形態に係る外部底壁３２及び前記サイドシル連結部材７０は、（１）前記容器本体１０の高い防水性と、（２）これに収容されるバッテリー４の有効な冷却と、（３）当該冷却のための冷却体８０及びこれが配置される容器本体１０の底壁１２の有効な保護と、（４）サイドシル２によるバッテリー容器の支持と、を簡単な構造で同時に合理的に実現することを可能にする。 Further, while the cooling body 80 is arranged outside the container body 10 in this way, the outer bottom wall 32 is arranged further below the bottom wall 12 so as to cover the lower surfaces of the cooling body 80 and the bottom wall 12. In addition, the side sill connecting member 70 for connecting the container body 10 to the side sill 2 of the automobile is effectively utilized to provide a vertical distance between the lower surface of the cooling body 80 and the bottom wall 12 and the outer bottom wall. By keeping the external protective space Se below the bottom wall 12, it is possible to effectively suppress the external force applied from the road surface to the external bottom wall 32 from acting on the bottom wall 12 and the cooling body 80. it can. This makes it possible to effectively protect the bottom wall 12 and the cooling body 80. That is, the outer bottom wall 32 and the side sill connecting member 70 according to this embodiment have (1) high waterproofness of the container body 10 and (2) effective cooling of the battery 4 housed therein. 3) Effective protection of the cooling body 80 for cooling and the bottom wall 12 of the container body 10 in which the cooling body 80 is arranged, and (4) support of the battery container by the side sill 2 are rationally realized at the same time with a simple structure. Allows you to.

本発明は、以上説明した実施の形態に限定されない。本発明は、例えば次のような態様を包含する。 The present invention is not limited to the embodiments described above. The present invention includes, for example, the following aspects.

（Ａ）バッテリー容器について
前記実施の形態では、容器本体１０がバッテリー収容空間Ｓｂの下半部を画定し、蓋２０が当該バッテリー収容空間Ｓｂの上半部を画定しているが、その比率は前記容器本体１０の周壁１４が当該バッテリー収容空間Ｓｂの少なくとも一部を囲むという条件を満たす範囲で適宜設定されることが可能である。例えば、容器本体の周壁がバッテリー収容空間の全体を囲み、当該バッテリー収容空間を上から覆うように平板状の蓋が前記周壁に装着される態様も本発明に包含される。 (A) Battery container In the above embodiment, the container body 10 defines the lower half of the battery storage space Sb, and the lid 20 defines the upper half of the battery storage space Sb. The peripheral wall 14 of the container body 10 can be appropriately set within a range satisfying the condition that the peripheral wall 14 surrounds at least a part of the battery accommodating space Sb. For example, the present invention also includes an embodiment in which a peripheral wall of the container body surrounds the entire battery accommodating space, and a flat plate-shaped lid is attached to the peripheral wall so as to cover the battery accommodating space from above.

前記容器本体１０及び前記蓋２０の双方がアルミニウム合金製の深絞り成形品で構成される場合、その成形性の確保のために両者を構成する板材の成形深さを小さく抑えることが望ましいが、前記実施の形態のように前記容器本体１０の周壁１４の内側に内部補強材５０が配置される場合には、当該内部補強材５０の高さ寸法の確保という観点から前記容器本体１０及び前記蓋２０の成形深さの比率が３：７から５：５であることが好ましい。 When both the container body 10 and the lid 20 are made of a deep-drawn molded product made of an aluminum alloy, it is desirable to keep the molding depth of the plate material constituting both of them small in order to ensure the moldability. When the internal reinforcing material 50 is arranged inside the peripheral wall 14 of the container body 10 as in the embodiment, the container body 10 and the lid are used from the viewpoint of ensuring the height dimension of the internal reinforcing material 50. The molding depth ratio of 20 is preferably 3: 7 to 5: 5.

（Ｂ）外部底壁について
本発明に係る外部底壁の上面と容器本体の底壁の下面との上下方向の間隔は、その間に冷却体を配置することが可能であるという条件を満たす範囲内で適宜設定されることが可能である。例えば、当該間隔は前記冷却体の上下方向の寸法よりもわずかに大きな寸法であってもよい。 (B) About the outer bottom wall The vertical distance between the upper surface of the outer bottom wall and the lower surface of the bottom wall of the container body according to the present invention is within the range satisfying the condition that the cooling body can be arranged between them. Can be set appropriately with. For example, the interval may be slightly larger than the vertical dimension of the cooling body.

前記外部底壁の具体的な材質や形状も自由に設定されることが可能である。例えば、前記外部底壁は、６０００系アルミニウム合金以外のアルミニウム合金、例えば５０００系アルミニウム合金のＨ調質材、により構成されてもよい。また、当該外部底壁は、外部への放熱の促進のために表面積を増やすべく、波板状に形成されたものや、放熱フィンが付加されたものであってもよい。 The specific material and shape of the outer bottom wall can also be freely set. For example, the outer bottom wall may be made of an aluminum alloy other than the 6000 series aluminum alloy, for example, an H-treated material of a 5000 series aluminum alloy. Further, the outer bottom wall may be formed in a corrugated plate shape or have heat radiation fins added in order to increase the surface area in order to promote heat dissipation to the outside.

（Ｃ）冷却体について
本発明に係る冷却体の具体的な構成は問わず、冷媒の流通を許容しながら当該冷媒と容器本体の底壁との間の熱交換によって当該底壁を冷却するものが広く包含される。 (C) Cooling body Regardless of the specific configuration of the cooling body according to the present invention, the bottom wall is cooled by heat exchange between the refrigerant and the bottom wall of the container body while allowing the flow of the refrigerant. Is widely included.

本発明に係る冷却体により形成される冷媒流路の形状は自由に設定されることが可能である。当該冷媒流路は、前記底壁の下面と平行な面に沿って蛇行する形状、例えば、車両の左右方向及び前後方向のうちのいずれか一方の方向に往復しながら他方の方向に進行するような形状、であってもよい。あるいは、バッテリー容器に収容されるバッテリーの発熱に偏りがある場合にはその発熱が著しい部位に重点的に冷媒を流すように冷媒流路の形状が設定されてもよい。ただし、前記実施の形態に係る冷却体８０のように冷媒流通方向と直交する配列方向に配列される複数の冷媒流通部８２を含むものは、軽量な構造で容器本体の底壁を広い範囲にわたって冷却することが可能である。 The shape of the refrigerant flow path formed by the cooling body according to the present invention can be freely set. The refrigerant flow path has a shape meandering along a surface parallel to the lower surface of the bottom wall, for example, traveling in the other direction while reciprocating in one of the left-right direction and the front-rear direction of the vehicle. Shape. Alternatively, when the heat generation of the battery housed in the battery container is uneven, the shape of the refrigerant flow path may be set so that the refrigerant flows mainly to the portion where the heat generation is remarkable. However, the cooling body 80 according to the above embodiment, which includes a plurality of refrigerant flow units 82 arranged in an arrangement direction orthogonal to the refrigerant flow direction, has a lightweight structure and covers a wide range of the bottom wall of the container body. It is possible to cool.

本発明に係る冷却体により流通が許容される冷媒は、冷却水などの液体に限定されず、気体であってもよい。例えば、当該冷却体は、当該冷却体と底壁の下面との間に走行風が流れることを許容する上下方向の風流通溝を画定するものであってもよい。この場合、容器本体の底壁と外部底壁との間の空間（前記外部保護空間Ｓｅ）は前後に開放される。逆に、前記実施の形態に係る冷却体８０のように走行風を利用しない態様では、前記外部保護空間Ｓｅへの走行風の進入を阻止するようにその前後の開口が塞がれてもよい。 The refrigerant permitted to be distributed by the cooling body according to the present invention is not limited to a liquid such as cooling water, and may be a gas. For example, the cooling body may define a vertical wind flow groove that allows running wind to flow between the cooling body and the lower surface of the bottom wall. In this case, the space between the bottom wall of the container body and the outer bottom wall (the external protective space Se) is opened back and forth. On the contrary, in the mode in which the traveling wind is not used like the cooling body 80 according to the embodiment, the openings before and after the traveling wind may be closed so as to prevent the traveling wind from entering the external protection space Se. ..

本発明に係る冷却体は、必ずしも容器本体の底壁の下面と直接接触するように当該下面に取付けられなくてもよい。例えば、当該容器本体の底壁の下面に当該冷却体が熱伝導性の高い接着剤で接着されること、あるいは、当該底壁の下面と当該冷却体との間に熱伝導シートが介在すること、によっても、当該底壁と当該冷却体との間の直接的な熱伝導を実現することが可能である。 The cooling body according to the present invention does not necessarily have to be attached to the lower surface of the bottom wall of the container body so as to be in direct contact with the lower surface. For example, the cooling body is adhered to the lower surface of the bottom wall of the container body with an adhesive having high thermal conductivity, or a heat conductive sheet is interposed between the lower surface of the bottom wall and the cooling body. It is also possible to realize direct heat conduction between the bottom wall and the cooling body.

また、前記冷却体は必ずしも前記底壁の下面に取付けられなくてもよい。当該冷却体は、前記底壁から離れた位置、例えば外部底壁の上面に接触する位置、に配置されて前記底壁からの輻射熱を奪うものであってもよい。あるいは、前記底壁と前記冷却体との間に介在する熱伝導媒体を通じて前記底壁の熱を熱伝導により奪うものであってもよい。当該熱伝導媒体は、前記外部底壁及びサイドシル連結部材を利用したものであってもよいし、これらとは別に前記冷却体と前記底壁との間に介設された専用のものであってもよい。ただし、前記実施の形態に示されるような底壁１２と冷却体８０との直接的な熱伝導は、簡単な構造で効果的な底壁１２及びバッテリー４の冷却を行うことを可能にする。 Further, the cooling body does not necessarily have to be attached to the lower surface of the bottom wall. The cooling body may be arranged at a position away from the bottom wall, for example, a position in contact with the upper surface of the outer bottom wall, and may take radiant heat from the bottom wall. Alternatively, the heat of the bottom wall may be removed by heat conduction through a heat conduction medium interposed between the bottom wall and the cooling body. The heat conductive medium may be one that utilizes the outer bottom wall and the side sill connecting member, or is separately provided between the cooling body and the bottom wall for exclusive use. May be good. However, the direct heat conduction between the bottom wall 12 and the cooling body 80 as shown in the above embodiment makes it possible to effectively cool the bottom wall 12 and the battery 4 with a simple structure.

（Ｄ）外部補強部について
本発明に係る外部補強部は、図１等に示されるような複数の外部補強材９０に限定されない。当該外部補強部は、容器本体の底壁と外部底壁との間隔を保つように当該底壁と当該外部底壁との間に介在するという条件を満たす範囲で様々な態様をとることが可能である。 (D) External Reinforcing Part The external reinforcing part according to the present invention is not limited to a plurality of external reinforcing members 90 as shown in FIG. 1 and the like. The external reinforcing portion can take various forms as long as it satisfies the condition that it is interposed between the bottom wall and the external bottom wall so as to maintain a distance between the bottom wall of the container body and the external bottom wall. Is.

前記外部補強部は、例えば、図１に示される前記複数の外部補強材９０に代えて外部保護空間Ｓｅの略全域に広がる大きさの単一の外部補強材により構成されることも可能である。当該単一の外部補強材は、例えば、図１に示される前記底壁１２の下面と前記外部底壁３２の上面のうち冷却体が配設されずに露出している面とに交互に接触するような波状断面をもつ板材により構成されることが可能である。当該板材は、例えば５０００系アルミニウム合金からなる板材のプレス成形品により構成されることが可能である。 The external reinforcing member may be composed of, for example, a single external reinforcing member having a size extending over substantially the entire area of the external protective space Se instead of the plurality of external reinforcing members 90 shown in FIG. .. The single external reinforcing member alternately contacts, for example, the lower surface of the bottom wall 12 shown in FIG. 1 and the upper surface of the outer bottom wall 32 where the cooling body is not arranged and is exposed. It can be composed of a plate material having a wavy cross section. The plate material can be composed of, for example, a press-molded product of a plate material made of a 5000 series aluminum alloy.

ただし、前記外部補強部は、前記実施の形態に係る複数の外部補強材９０のようにそれぞれの長手方向と直交する方向に間隔をおいて配置される複数の外部補強材を含むことにより、車両の軽量化に寄与しながら広い範囲にわたって前記底壁を有効に保護することが可能である。 However, the external reinforcing member includes a plurality of external reinforcing members arranged at intervals in a direction orthogonal to each longitudinal direction, such as the plurality of external reinforcing members 90 according to the embodiment. It is possible to effectively protect the bottom wall over a wide range while contributing to weight reduction.

この効果は、例えば前記長手方向が車体の左右方向と合致するような配置であっても得ることが可能であるが、前記実施の形態のようにそれぞれの外部補強材９０の長手方向が車体の前後方向と合致するような配置は、車両の走行中に前記外部補強材９０に対して車両の前後方向の成分を含む荷重が作用したときの当該外部補強材９０の変形を抑制することを可能にする。例えば、前記外部補強材９０の長手方向が車体の左右方向と合致している場合、当該外部補強材９０に対して車両の前後方向の荷重は前記長手方向と直交する方向に作用することになるので、前記外部補強材９０の底壁対向部である中間対向部９４が前記車両の左右方向に沿って前記荷重の向きに水平変位するように右側及び左側連結部９５，９６が傾くような変形が生じやすい。これに対し、前記外部補強材９０の長手方向が車両の前後方向と合致する場合、車両の前後方向の荷重は前記外部補強材９０に対してその長手方向、つまり剛性の高い方向、に作用するので、当該荷重に起因する外部補強材９０の変形は有効に抑えられる。 This effect can be obtained even if the longitudinal direction matches the left-right direction of the vehicle body, for example, but the longitudinal direction of each external reinforcing member 90 is the vehicle body as in the embodiment. The arrangement that matches the front-rear direction makes it possible to suppress the deformation of the external reinforcing material 90 when a load including a component in the front-rear direction of the vehicle acts on the external reinforcing material 90 while the vehicle is traveling. To. For example, when the longitudinal direction of the external reinforcing member 90 matches the left-right direction of the vehicle body, the load in the front-rear direction of the vehicle acts on the external reinforcing member 90 in the direction orthogonal to the longitudinal direction. Therefore, the right and left connecting portions 95 and 96 are deformed so that the intermediate facing portion 94, which is the bottom wall facing portion of the external reinforcing member 90, is horizontally displaced in the direction of the load along the left-right direction of the vehicle. Is likely to occur. On the other hand, when the longitudinal direction of the external reinforcing member 90 coincides with the front-rear direction of the vehicle, the load in the front-rear direction of the vehicle acts on the external reinforcing member 90 in the longitudinal direction, that is, in the direction of high rigidity. Therefore, the deformation of the external reinforcing member 90 due to the load is effectively suppressed.

前記複数の外部補強材のそれぞれの断面形状も限定されない。当該外部補強材は、少なくとも、前記長手方向に延びて前記底壁の下面と対向しかつ接触可能な底壁対向部と、前記長手方向に延びて外部底壁の上面と対向しかつ接触可能な外部底壁対向部と、前記長手方向に延びて前記底壁対向部と前記外部底壁対向部とを上下方向に連結する連結部と、を一体に有することにより、軽量な構造で底壁の有効な補強を行うことが可能である。例えば、本発明に係る外部補強材は、前記右側対向部９１及び前記左側対向部９２が外部底壁対向部に相当し、逆に前記中間対向部９４が底壁対向部に相当するような断面形状を有するものでもよい。また、前記外部底壁対向部及び前記底壁対向部のそれぞれが単数の部位からなるもの、例えば、Ｈ型鋼と同等の断面形状を有する押出形材により構成されたものであってその上下一対のフランジ部が前記外部底壁対向部及び前記底壁対向部を構成するように配置されるものであってもよい。あるいは、内部空間を囲む中空断面を有するものであってもよい。 The cross-sectional shape of each of the plurality of external reinforcing materials is also not limited. The external reinforcing material has at least a bottom wall facing portion extending in the longitudinal direction and facing and contacting the lower surface of the bottom wall, and the external reinforcing material extending in the longitudinal direction and facing and contacting the upper surface of the outer bottom wall. By integrally having the outer bottom wall facing portion and the connecting portion extending in the longitudinal direction and connecting the bottom wall facing portion and the outer bottom wall facing portion in the vertical direction, the bottom wall has a lightweight structure. It is possible to perform effective reinforcement. For example, the external reinforcing material according to the present invention has a cross section in which the right facing portion 91 and the left facing portion 92 correspond to an external bottom wall facing portion, and conversely, the intermediate facing portion 94 corresponds to a bottom wall facing portion. It may have a shape. Further, each of the outer bottom wall facing portion and the bottom wall facing portion is composed of a single portion, for example, one made of an extruded profile having a cross-sectional shape equivalent to that of H-shaped steel, and a pair of upper and lower portions thereof. The flange portion may be arranged so as to form the outer bottom wall facing portion and the bottom wall facing portion. Alternatively, it may have a hollow cross section surrounding the internal space.

ただし、前記実施の形態に係る冷却体８０、すなわち、複数の冷媒流通部８２を含んで底壁１２の下面に接触するような冷却体８０、に対しては、前記実施の形態に係る複数の外部補強材９０のように、それぞれが、前記複数の冷媒流通部８２のそれぞれの両側の位置で前記長手方向に延びて前記底壁１２の下面と対向しかつ接触可能な第１対向部及び第２対向部（前記実施の形態では右側及び左側対向部９１，９２）と、前記複数の冷媒流通部のそれぞれの下方の位置で前記長手方向に延びて前記外部底壁の上面と対向しかつ接触可能な中間対向部（前記実施の形態では中間対向部９４）と、前記中間対向部と前記第１対向部及び前記第２対向部とをそれぞれ連結する第１及び第２連結部（前記実施の形態では右側及び左側連結部９５，９６）と、を含むことにより、前記複数の冷媒流通部８２の有効な保護が可能である。 However, with respect to the cooling body 80 according to the embodiment, that is, the cooling body 80 including the plurality of refrigerant flow units 82 and coming into contact with the lower surface of the bottom wall 12, a plurality of cooling bodies according to the embodiment. Like the external reinforcing member 90, the first facing portion and the first facing portion and the first facing portion and the first facing portion, each of which extends in the longitudinal direction at positions on both sides of the plurality of refrigerant flow portions 82 and can face and contact the lower surface of the bottom wall 12. 2 Facing portions (right side and left facing portions 91, 92 in the embodiment) and the plurality of refrigerant flow portions each extending in the longitudinal direction facing and contacting the upper surface of the outer bottom wall. A possible intermediate facing portion (intermediate facing portion 94 in the embodiment), and first and second connecting portions (the first and second connecting portions) that connect the intermediate facing portion, the first facing portion, and the second facing portion, respectively. By including the right side and left side connecting portions 95,96) in the form, it is possible to effectively protect the plurality of refrigerant flow units 82.

前記外部補強材は、必ずしも底壁及び外部底壁の双方に接合されていなくてもよい。当該外部補強材は、例えば、前記底壁及び前記外部底壁のいずれか一方の壁にのみ接合され、他方の壁には対向して接触するのみ、あるいは隙間をおいて対向しているがその隙間が微小であって当該他方の壁に対して実質上接触することが可能となるように配置されたものであれば、前記底壁に近づく向きの前記外部底壁の変位を抑制する補強部材として機能することが可能である。 The external reinforcing material does not necessarily have to be joined to both the bottom wall and the external bottom wall. The external reinforcing material is joined to, for example, only one of the bottom wall and the external bottom wall, and only faces the other wall, or faces the other wall with a gap. If the gap is small and is arranged so as to be substantially in contact with the other wall, a reinforcing member that suppresses displacement of the outer bottom wall in a direction approaching the bottom wall. It is possible to function as.

前記外部補強材の材質は７０００系アルミニウム合金に限定されない。当該外部補強材は例えば７０００系アルミニウム合金以外のアルミニウム合金からなるものであってもよい。 The material of the external reinforcing material is not limited to the 7000 series aluminum alloy. The external reinforcing material may be made of, for example, an aluminum alloy other than the 7000 series aluminum alloy.

（Ｅ）サイドシル連結部材について
本発明に係るサイドシル連結部材の具体的な構造は限定されない。当該サイドシル連結部材は、例えば、単なる板状のブラケットであってもよい。ただし、当該サイドシル連結部材は、前記サイドシル連結部材７０のように車体の左右方向に並ぶ複数の閉断面を有することにより、サイドシルに加えられる衝撃荷重を当該サイドシル連結部材自体の圧壊によって吸収する補強部材として機能することが可能である。 (E) Side sill connecting member The specific structure of the side sill connecting member according to the present invention is not limited. The side sill connecting member may be, for example, a simple plate-shaped bracket. However, the side sill connecting member has a plurality of closed cross sections arranged in the left-right direction of the vehicle body like the side sill connecting member 70, so that the impact load applied to the side sill is absorbed by the crushing of the side sill connecting member itself. It is possible to function as.

本発明ではサイドシル連結部材における外部底壁保持部の具体的な形状及び構造も限定されない。当該外部底壁保持部は、容器本体の底壁と外部底壁との上下方向の間隔を保つように当該外部底壁を保持するものを広く包含する。例えば、図４に示される外部底壁３２が水平方向の底壁本体に加えて当該底壁本体の左右両端部から上方に延びる被保持部を含み、当該被保持部が容器本体の周壁１４とサイドシル連結部材７０の内側端部との間に挟み込まれる状態で当該サイドシル連結部材７０の内側端部に固定されてもよい。この場合、前記サイドシル連結部材７０の前記内側端部が容器連結部及び外部底壁保持部の双方として機能することになる。 In the present invention, the specific shape and structure of the outer bottom wall holding portion in the side sill connecting member are also not limited. The outer bottom wall holding portion broadly includes a portion that holds the outer bottom wall so as to maintain a vertical distance between the bottom wall of the container body and the outer bottom wall. For example, the outer bottom wall 32 shown in FIG. 4 includes a held portion extending upward from both left and right ends of the bottom wall main body in addition to the horizontal bottom wall main body, and the held portion includes a peripheral wall 14 of the container main body. It may be fixed to the inner end portion of the side sill connecting member 70 in a state of being sandwiched between the side sill connecting member 70 and the inner end portion. In this case, the inner end portion of the side sill connecting member 70 functions as both a container connecting portion and an outer bottom wall holding portion.

本発明において、荷重伝達部（図４では荷重伝達壁７８）は必須ではない。また、当該荷重伝達部の具体的な形状及び構造も限定されない。当該荷重伝達部は、例えば、図４に示される下外壁７２の下面と前記外部底壁保持部７７とに挟まれるコーナー部分を埋めるように配置されるリブであってもよい。 In the present invention, the load transmission unit (load transmission wall 78 in FIG. 4) is not essential. Further, the specific shape and structure of the load transmitting portion are not limited. The load transmitting portion may be, for example, a rib arranged so as to fill a corner portion sandwiched between the lower surface of the lower outer wall 72 shown in FIG. 4 and the outer bottom wall holding portion 77.

２ サイドシル
４ バッテリー
１０ 容器本体
１２ 底壁
１４ 周壁
２０ 蓋
３２ 外部底壁
７０ サイドシル連結部材
７６ 閉断面
７７ 外部底壁保持部
７８ 荷重伝達壁
８０ 冷却体
８２ 冷媒流通部
９０ 外部補強材
９１ 右側対向部（第１対向部）
９２ 左側対向部（第２対向部）
９４ 中間対向部
９５ 右側連結部（第１連結部）
９６ 左側連結部（第２連結部） 2 Side sill 4 Battery 10 Container body 12 Bottom wall 14 Circumferential wall 20 Lid 32 External bottom wall 70 Side sill connecting member 76 Closed cross section 77 External bottom wall holding part 78 Load transmission wall 80 Cooling body 82 Refrigerant flow part 90 External reinforcing material 91 Right facing part (1st facing part)
92 Left facing part (second facing part)
94 Intermediate facing part 95 Right side connecting part (first connecting part)
96 Left side connecting part (second connecting part)

Claims (11)

自動車の車体の下部においてバッテリーを収容するためのバッテリー収容ユニットであって、
アルミニウム合金からなる深絞り成形品により構成され、底壁及びこれと一体につながって容器内空間の少なくとも一部を囲む周壁を有する容器本体と、
前記容器本体の上側の位置で前記容器内空間を覆うように前記容器本体に装着される蓋と、
前記底壁から下方に離れた位置に配置される外部底壁と、
前記底壁と前記外部底壁との間に配置され、冷媒の流通を許容しながら当該冷媒と前記底壁とを熱交換させて当該底壁を冷却する冷却体と、
前記車体の左右方向において当該容器本体の外側に位置するサイドシルと前記容器本体との間に介在するサイドシル連結部材と、を備え、
前記サイドシル連結部材は、前記容器本体が当該サイドシル連結部材を介して前記サイドシルに支持されるように当該容器本体及び当該サイドシルにそれぞれ連結される容器連結部及びサイドシル連結部と、前記底壁及び前記冷却体と前記外部底壁との間隔を保つように当該外部底壁を保持する外部底壁保持部と、を有する、バッテリー収容ユニット。 A battery accommodating unit for accommodating a battery in the lower part of the car body.
A container body composed of a deep-drawn molded product made of an aluminum alloy and having a bottom wall and a peripheral wall integrally connected to the bottom wall and surrounding at least a part of the space inside the container.
A lid attached to the container body so as to cover the space inside the container at a position above the container body,
An external bottom wall located at a position downward from the bottom wall,
A cooling body arranged between the bottom wall and the outer bottom wall to cool the bottom wall by exchanging heat between the refrigerant and the bottom wall while allowing the flow of the refrigerant.
A side sill located outside the container body in the left-right direction of the vehicle body and a side sill connecting member interposed between the container body are provided.
The side sill connecting member includes a container body, a container connecting portion and a side sill connecting portion connected to the side sill so that the container body is supported by the side sill via the side sill connecting member, and the bottom wall and the side sill connecting member. A battery accommodating unit having an external bottom wall holding portion that holds the external bottom wall so as to maintain a distance between the cooling body and the external bottom wall. 請求項１記載のバッテリー収容ユニットであって、前記冷却体は前記底壁と熱伝導可能となるように当該底壁の下面に取付けられる、バッテリー収容ユニット。 The battery accommodating unit according to claim 1, wherein the cooling body is attached to the lower surface of the bottom wall so as to be heat conductive with the bottom wall. 請求項１または２記載のバッテリー収容ユニットであって、前記容器本体は５０００系アルミニウム合金からなり、前記外部底壁は６０００系アルミニウム合金からなる板材により構成されている、バッテリー収容ユニット。 The battery accommodating unit according to claim 1 or 2, wherein the container body is made of a 5000 series aluminum alloy, and the outer bottom wall is made of a plate material made of a 6000 series aluminum alloy. 請求項３記載のバッテリー収容ユニットであって、前記底壁と前記外部底壁との間に介在して当該底壁と当該外部底壁との間隔を保つ外部補強部をさらに備える、バッテリー収容ユニット。 The battery accommodating unit according to claim 3, further comprising an external reinforcing portion that is interposed between the bottom wall and the external bottom wall to maintain a distance between the bottom wall and the external bottom wall. .. 請求項１〜３のいずれかに記載のバッテリー収容ユニットであって、前記冷却体は、それぞれが前記底壁の下面に沿った特定の冷媒流通方向に延びて当該冷媒流通方向への前記冷媒の流通を許容する複数の冷媒流通部を含み、当該複数の冷媒流通部が前記冷媒流通方向と直交する方向に間隔をおいて配置されている、バッテリー収容ユニット。 The battery accommodating unit according to any one of claims 1 to 3, wherein each of the cooling bodies extends in a specific refrigerant flow direction along the lower surface of the bottom wall of the refrigerant in the refrigerant flow direction. A battery accommodating unit including a plurality of refrigerant flow units that allow circulation, and the plurality of refrigerant flow units are arranged at intervals in a direction orthogonal to the refrigerant flow direction. 請求項４記載のバッテリー収容ユニットであって、前記冷却体は、それぞれが前記底壁の下面に沿った特定の冷媒流通方向に延びて当該冷媒流通方向への前記冷媒の流通を許容する複数の冷媒流通部を含み、当該複数の冷媒流通部が前記冷媒流通方向と直交する方向に間隔をおいて配置され、前記外部補強部は、それぞれが前記冷媒流通方向と平行な長手方向に延びる複数の外部補強材を含み、当該複数の外部補強材のそれぞれが前記複数の冷媒流通部を前記冷媒流通方向と直交する方向であって前記底壁の下面に沿う方向にまたぎながら当該冷媒流通部の両側の位置で前記底壁の下面に接合されている、バッテリー収容ユニット。 The battery accommodating unit according to claim 4, wherein each of the cooling bodies extends in a specific refrigerant flow direction along the lower surface of the bottom wall to allow the flow of the refrigerant in the refrigerant flow direction. A plurality of refrigerant flow sections including a refrigerant flow section are arranged at intervals in a direction orthogonal to the refrigerant flow direction, and a plurality of external reinforcing sections, each extending in a longitudinal direction parallel to the refrigerant flow direction. Both sides of the refrigerant flow section, including the external reinforcing material, each of the plurality of external reinforcing materials straddles the plurality of refrigerant flow sections in a direction orthogonal to the refrigerant flow direction and along the lower surface of the bottom wall. A battery accommodating unit joined to the lower surface of the bottom wall at the position of. 請求項６記載のバッテリー収容ユニットであって、前記複数の外部補強材のそれぞれは、前記複数の冷媒流通部のそれぞれの両側の位置で前記長手方向に延びて前記底壁の下面と対向しかつ接触可能な第１対向部及び第２対向部と、前記複数の冷媒流通部のそれぞれの下方の位置で前記長手方向に延びて前記外部底壁の上面と対向しかつ接触可能な中間対向部と、前記中間対向部と前記第１対向部とを連結する第１連結部と、前記中間対向部と前記第２対向部とを連結する第２連結部と、を含む、バッテリー収容ユニット。 The battery accommodating unit according to claim 6, wherein each of the plurality of external reinforcing materials extends in the longitudinal direction at positions on both sides of each of the plurality of refrigerant flow portions and faces the lower surface of the bottom wall. A contactable first facing portion and a second facing portion, and an intermediate facing portion that extends in the longitudinal direction at a position below each of the plurality of refrigerant flow portions and faces and is in contact with the upper surface of the outer bottom wall. A battery accommodating unit including a first connecting portion that connects the intermediate facing portion and the first facing portion, and a second connecting portion that connects the intermediate facing portion and the second facing portion. 請求項６または７記載のバッテリー収容ユニットであって、前記冷媒流通方向及び前記長手方向は、前記車体の前後方向と平行な方向である、バッテリー収容ユニット。 The battery accommodating unit according to claim 6 or 7, wherein the refrigerant flow direction and the longitudinal direction are parallel to the front-rear direction of the vehicle body. 請求項６〜８のいずれかに記載のバッテリー収容ユニットであって、前記複数の外部補強材のそれぞれは７０００系アルミニウム合金からなる押出形材により構成されている、バッテリー収容ユニット。 The battery accommodating unit according to any one of claims 6 to 8, wherein each of the plurality of external reinforcing materials is made of an extruded shape member made of a 7000 series aluminum alloy. 請求項１〜９のいずれかに記載のバッテリー収容ユニットであって、前記サイドシル連結部材は、前記サイドシルに加えられた前記車体の左右方向の内向きの衝撃荷重により圧壊して当該衝撃荷重を吸収するように左右方向に並ぶ複数の閉断面を有する、バッテリー収容ユニット。 The battery accommodating unit according to any one of claims 1 to 9, wherein the side sill connecting member is crushed by an inward impact load in the left-right direction of the vehicle body applied to the side sill to absorb the impact load. A battery accommodating unit having a plurality of closed cross sections arranged in the left-right direction so as to be. 請求項１０記載のバッテリー収容ユニットであって、前記外部底壁保持部は前記複数の閉断面を有する本体部から下方に突出し、前記サイドシル連結部材は前記本体部に加えられた前記車体の左右方向の内向きの荷重を前記外部底壁保持部に伝達するように前記本体部において前記外部底壁保持部よりも前記車体の左右方向の外側の部位と前記外部底壁保持部の下端とを連結する荷重伝達部をさらに含む、バッテリー収容ユニット。 The battery accommodating unit according to claim 10, wherein the outer bottom wall holding portion projects downward from the main body portion having the plurality of closed cross sections, and the side sill connecting member is added to the main body portion in the left-right direction of the vehicle body. In the main body portion, a portion outside the vehicle body in the left-right direction and the lower end of the external bottom wall holding portion are connected so as to transmit the inward load of the vehicle body to the external bottom wall holding portion. A battery accommodating unit that further includes a load transfer section.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012256468A (en) * 2011-06-08 2012-12-27 Honda Motor Co Ltd Power supply device for vehicle
JP2019089377A (en) * 2017-11-13 2019-06-13 マツダ株式会社 Battery loading structure of electric vehicle
JP2021068521A (en) * 2019-10-18 2021-04-30 株式会社神戸製鋼所 Battery accommodating unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012256468A (en) * 2011-06-08 2012-12-27 Honda Motor Co Ltd Power supply device for vehicle
JP2019089377A (en) * 2017-11-13 2019-06-13 マツダ株式会社 Battery loading structure of electric vehicle
JP2021068521A (en) * 2019-10-18 2021-04-30 株式会社神戸製鋼所 Battery accommodating unit

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