JP7166812B2 - vehicle battery case - Google Patents

vehicle battery case Download PDF

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JP7166812B2
JP7166812B2 JP2018127808A JP2018127808A JP7166812B2 JP 7166812 B2 JP7166812 B2 JP 7166812B2 JP 2018127808 A JP2018127808 A JP 2018127808A JP 2018127808 A JP2018127808 A JP 2018127808A JP 7166812 B2 JP7166812 B2 JP 7166812B2
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battery
cover
metal
metal layer
laminated
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JP2019016596A (en
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浩行 植村
英靖 藤松
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Inoac Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Battery Mounting, Suspending (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Description

本発明は、車両用バッテリーケースに関する。 The present invention relates to a vehicle battery case.

従来、電気自動車やバイブリッドカーの車両においては、複数のバッテリーセルがパックとなったバッテリーパック等の多数のバッテリーがバッテリケースに収納され、搭載されている。電気自動車等では、電磁波が発生し、この発生した電磁波が、車体に装備される各種の電機部品に影響を与える懸念がある。このため、バッテリー又は付随する電気部品又はバッテリーケースの外部から発生する電磁波をシールドする目的で、バッテリーケースは金属製のものが採用されていた。しかし、金属製のバッテリーケースは所定の電磁波シールド性を確保できるものの、バッテリーケース自体の重量が重くなり、車両の軽量化を図ることが困難であり、また燃費効率の観点で改善が望まれていた。 2. Description of the Related Art Conventionally, in a vehicle such as an electric vehicle or a hybrid car, a large number of batteries such as a battery pack in which a plurality of battery cells are packed are housed in a battery case and mounted. Electromagnetic waves are generated in electric vehicles and the like, and there is concern that the generated electromagnetic waves may affect various electrical parts mounted on the vehicle body. For this reason, metal battery cases have been adopted for the purpose of shielding electromagnetic waves generated from the outside of the battery, associated electrical components, or the battery case. However, although a metal battery case can secure a certain level of electromagnetic shielding, the weight of the battery case itself increases, making it difficult to reduce the weight of the vehicle. rice field.

このため、特許文献１においては、ポリプロピレン樹脂に対し炭素繊維および難燃剤を配合してなる炭素繊維強化ポリプロピレン樹脂組成物を成形する車輌用バッテリーケースが提案されている。これによれば、成形加工性と軽量性も兼ね備えているものの未だ電磁波シールド性（特に磁界シールド）が十分であるとは言い難かった。
また、特許文献２には、軽量な車両用電磁波シールドカバーとして、樹脂製のカバー本体の一方の面に、導電金属層を１対の樹脂層で挟んだノイズ遮断シートを敷設したものが開示されている。
また、電気自動車の車載バッテリーのなかには、バッテリーおよびバッテリーケースを車体フロアから密閉し格納しているものもある。このようなバッテリーケースのなかには、アッパーケースとロアーケースとをそれぞれのフランジ部でボルトにより締結しているものもある。（特許文献３参照）。 For this reason, Patent Literature 1 proposes a vehicle battery case formed from a carbon fiber-reinforced polypropylene resin composition obtained by blending carbon fibers and a flame retardant with polypropylene resin. According to this, it is difficult to say that the electromagnetic wave shielding property (particularly, the magnetic field shielding property) is still sufficient, although both the moldability and the lightness are achieved.
Further, Patent Document 2 discloses a lightweight vehicle electromagnetic wave shielding cover in which a noise blocking sheet having a conductive metal layer sandwiched between a pair of resin layers is laid on one surface of a resin cover body. ing.
Further, among the onboard batteries of electric vehicles, there are some in which the battery and the battery case are sealed and housed from the vehicle body floor. Among such battery cases, there are cases in which an upper case and a lower case are fastened together by bolts at respective flange portions. (See Patent Document 3).

特開２０１４－６２１８９号公報JP 2014-62189 A 特開２０１３－７１７０２号公報Japanese Unexamined Patent Application Publication No. 2013-71702 特開平８－１８６３９０号公報JP-A-8-186390

本発明は前記の点に鑑みなされたものであって、加工時の形状自由度等の成形加工性と軽量性も良く、さらに電磁波シールド性（電界シールド性及び磁界シールド性）に優れた車両用バッテリーケースの提供を目的とする。 The present invention has been made in view of the above points. The purpose is to provide a battery case.

請求項１の発明は、バッテリーケースにおいて、バッテリーを収納する、底部及び該底部の周縁を囲む壁部からなる収納空間を有する金属製のバッテリー受け部と、該バッテリー受け部の前記収納空間全面を覆うバッテリーカバーとを備え、前記バッテリーカバーは、樹脂層とその片面に金属層が積層された積層体であり、前記バッテリー受け部を覆う天井部と、天井部の周縁を囲むカバー壁部とを備え、前記バッテリーカバーの金属層は、前記バッテリー受け部側に積層されるとともに前記バッテリー受け部の金属部分と接することを特徴とする。 The first aspect of the invention provides a battery case comprising: a metal battery receiving part for storing a battery; The battery cover is a laminated body in which a resin layer and a metal layer are laminated on one side thereof, and includes a ceiling part that covers the battery receiving part and a cover wall part that surrounds the periphery of the ceiling part. The metal layer of the battery cover is laminated on the side of the battery receiving part and is in contact with the metal part of the battery receiving part.

請求項２の発明は、バッテリーケースにおいて、バッテリーを収納する、底部及び該底部の周縁を囲む壁部からなる収納空間を有する金属製のバッテリー受け部と、該バッテリー受け部の前記収納空間を覆うバッテリーカバーとを備え、前記バッテリーカバーは、樹脂層とその片面に金属層が積層された積層体であり、前記バッテリー受け部を覆う天井部と、天井部の周縁を囲むカバー壁部とを備え、前記バッテリーカバーの金属層は、前記バッテリー受け部側に積層されるとともに前記バッテリー受け部と締結補助具を介して接して締結されていることを特徴とする。 In the battery case, the battery is covered with a metal battery receiving part having a storage space consisting of a bottom part and a wall part surrounding the periphery of the bottom part for storing the battery, and the storage space of the battery receiving part being covered. a battery cover, wherein the battery cover is a laminated body in which a resin layer and a metal layer are laminated on one side thereof, and includes a ceiling portion that covers the battery receiving portion and a cover wall portion that surrounds the periphery of the ceiling portion. The metal layer of the battery cover is laminated on the side of the battery receiving part and is fastened in contact with the battery receiving part via a fastening aid.

請求項３の発明は、請求項１または請求項２の発明において、前記バッテリーカバーの金属層は、金属溶射により溶射されたものであることを特徴とする。 The invention of claim 3 is characterized in that, in the invention of claim 1 or claim 2, the metal layer of the battery cover is sprayed by metal spraying.

請求項４の発明は、請求項２または請求項３の発明において、前記バッテリーカバーの樹脂層がバッテリー受け部の金属部分に接するように配置され、バッテリーカバーの端部とバッテリー受け部の端部を重ねた状態で導電性を有する締結補助具が装着され、該バッテリーカバーの端部と該バッテリー受け部の端部と該締結補助具にはそれぞれ穴を有しており、当該穴に締結部材を挿入して締結することを特徴とする。 The invention of claim 4 is the invention of claim 2 or claim 3, wherein the resin layer of the battery cover is arranged so as to be in contact with the metal portion of the battery receiving portion, and the end portion of the battery cover and the end portion of the battery receiving portion A conductive fastening aid is mounted in a state where the two are stacked, and the end of the battery cover, the end of the battery receiving portion, and the fastening aid each have a hole, and the fastening member in the hole It is characterized by inserting and fastening.

請求項５の発明は、請求項２または請求項３において、前記バッテリーカバーの端部に導電性を有する締結補助具が装着され、該締結補助具がバッテリーカバーの端部を挟んでバッテリー受け部に接するようにバッテリーカバーとバッテリー受け部とが配置され、該バッテリーカバーの端部と該バッテリー受け部と該締結補助具には、それぞれ穴を有しており、当該穴に締結部材を挿入して締結することを特徴とする。 The invention of claim 5 is the battery cover according to claim 2 or claim 3, wherein a conductive fastening aid is attached to the end of the battery cover, and the fastening aid sandwiches the end of the battery cover. The battery cover and the battery receiving part are arranged so as to be in contact with each other, and the ends of the battery cover, the battery receiving part, and the fastening aid each have a hole, and a fastening member is inserted into the hole. It is characterized by being concluded.

本発明によれば、成形加工性（形状自由度）と軽量性も良いバッテリーカバーを提供することができ、さらにバッテリー受け部と組合せてバッテリーケース全体としても軽量化と電磁波シールド性（電界シールド性及び磁界シールド性）を高めることができ、燃費効率にも貢献することができる。 According to the present invention, it is possible to provide a battery cover that is excellent in moldability (shape flexibility) and light weight. and magnetic field shielding properties) can be improved, and fuel efficiency can also be contributed.

本発明のバッテリーカバーとバッテリー受け部と組合されたバッテリーケース全体の斜視図である。1 is a perspective view of a battery case combined with a battery cover and a battery receiving part of the present invention; FIG. 本発明のバッテリー受け部とバッテリーカバーとの接続締結部付近の断面概略図である。FIG. 3 is a schematic cross-sectional view of the vicinity of a connection fastening portion between a battery receiving portion and a battery cover of the present invention; 本発明の別の態様のバッテリー受け部とバッテリーカバーとの接続締結部付近の断面概略図である。FIG. 5 is a schematic cross-sectional view of the vicinity of a connection fastening portion between a battery receiving portion and a battery cover according to another aspect of the present invention; 本発明の別の態様のバッテリー受け部とバッテリーカバーとが接続締結されたバッテリーカバーの断面概略図である。FIG. 4 is a schematic cross-sectional view of a battery cover in which a battery receiving portion and a battery cover are connected and fastened according to another aspect of the present invention; 本発明の別の態様におけるバッテリー受け部のフランジ部とバッテリーカバーのフランジ部との締結された部分の断面拡大図である。FIG. 6 is an enlarged cross-sectional view of a fastened portion between the flange portion of the battery receiving portion and the flange portion of the battery cover in another aspect of the present invention; 本発明の別の態様におけるバッテリー受け部のフランジ部とバッテリーカバーのフランジ部との締結された部分の断面拡大図である。FIG. 6 is an enlarged cross-sectional view of a fastened portion between the flange portion of the battery receiving portion and the flange portion of the battery cover in another aspect of the present invention; 本発明のバッテリーカバーの各種物性を示す表である。4 is a table showing various physical properties of the battery cover of the present invention;

以下、本発明の一実施形態を図１～図７を用いて説明する。本実施形態に係る電気自動車８０は、車両本体８５の底部１２又は後方部に複数のバッテリーがパックとなったバッテリーパック（各図において省略）を載せたバッテリー受け部１０とそのバッテリー受け部と嵌合しえるバッテリーカバー２０とからなるバッテリーケース５を備えている。バッテリーケース内には、バッテリーパックを車両の前後方向、左右方向に複数個ずつ並べて配置されている。各バッテリーには、複数のバッテリーセルを接続して端子をつけたものであり、バッテリーパックは、複数のバッテリー、センサー及び電気部品が備えられている。 An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. FIG. An electric vehicle 80 according to the present embodiment includes a battery receiving portion 10 on which a battery pack (not shown in each drawing) having a plurality of batteries is mounted on a bottom portion 12 or a rear portion of a vehicle body 85, and the battery receiving portion is fitted. It has a battery case 5 consisting of a battery cover 20 which can be put together. In the battery case, a plurality of battery packs are arranged side by side in the longitudinal direction and the lateral direction of the vehicle. Each battery consists of a plurality of connected battery cells and terminals, and a battery pack includes a plurality of batteries, sensors and electrical components.

バッテリーケース５は、図１に示すように複数のバッテリー（バッテリーパック）を収納可能なバッテリー受け部１０と、バッテリー受け部の上面側に設けられ、バッテリー受け部を覆い嵌合可能なバッテリーカバー２０とを備える。 As shown in FIG. 1, the battery case 5 includes a battery receiving portion 10 capable of accommodating a plurality of batteries (battery packs), and a battery cover 20 provided on the upper surface side of the battery receiving portion and capable of covering and fitting the battery receiving portion. and

バッテリー受け部１０は、複数のバッテリーを載せる底部１２と該底部の周縁につながり該底部の周囲を囲む壁部１４を有しており、バッテリー受け部の上面側に設けられたバッテリーカバー２０との間に空間が形成され、該空間（バッテリー収納空間７）にバッテリーが収納される。バッテリー受け部１０は、複数のバッテリーを収納可能なように剛性の高い金属製により構成される。 The battery receiving portion 10 has a bottom portion 12 on which a plurality of batteries are placed and a wall portion 14 connected to the periphery of the bottom portion and surrounding the periphery of the bottom portion. A space is formed between them, and the battery is housed in this space (battery housing space 7). The battery receiving part 10 is made of metal with high rigidity so that it can accommodate a plurality of batteries.

バッテリーケース５の上部に配置されるバッテリーカバー２０は、天井部２２と該天井部の周縁につながり該天井部の周囲を囲むカバー壁部２４とを備える。
またバッテリーカバー２０は、樹脂層２６とその表面に金属層２８が積層された積層体で構成される。具体的には、例えば図２のように、樹脂層の上表面側に金属層が積層された積層体で構成されるもの、すなわち、バッテリーケース５の上部側が金属層であるバッテリーカバーが挙げられる。また、別の態様としては、例えば図３のように、樹脂層２６の下表面側に金属層が積層された積層体で構成されるものも挙げられ、この場合、バッテリーケース５の上部側が樹脂層であるバッテリーカバーが挙げられる。これらの金属層は、金属溶射により溶射されたものが好ましい。 A battery cover 20 arranged on the upper part of the battery case 5 includes a ceiling portion 22 and a cover wall portion 24 connected to the periphery of the ceiling portion and surrounding the ceiling portion.
Also, the battery cover 20 is composed of a laminate in which a resin layer 26 and a metal layer 28 are laminated on the surface thereof. Specifically, for example, as shown in FIG. 2, there is a battery cover composed of a laminate in which a metal layer is laminated on the upper surface side of a resin layer, that is, a battery cover in which the upper side of the battery case 5 is a metal layer. . Further, as another embodiment, for example, as shown in FIG. A battery cover, which is a layer. These metal layers are preferably sprayed by metal spraying.

バッテリー受け部１０とバッテリーカバー２０とは、例えば、バッテリー受け部１０の端部に穴を数個あけ、また、バッテリーカバーの端部にも穴を数個あけ、両端部の穴の部分に締結部材を挿入して、締結される。締結部材としては、ボルト、ナットのほか、クリップ等が挙げられる。なお、図１では、締結部材を省略して図示している。 The battery receiving part 10 and the battery cover 20 are connected, for example, by drilling several holes in the end of the battery receiving part 10, drilling several holes in the end of the battery cover, and fastening them to the holes on both ends. The members are inserted and fastened. Fastening members include bolts, nuts, clips, and the like. In addition, in FIG. 1, a fastening member is abbreviate|omitted and shown in figure.

バッテリー受け部１０とバッテリーカバー２０とが直接接する態様としては、以下が挙げられる。
図２には、バッテリー受け部１０とバッテリーカバー２０とが接する部分の断面概略図を示す。このように、バッテリーケース５の上部側が金属層２８であるバッテリーカバーのカバー壁部２４の金属層側（外側）が、金属製のバッテリー受け部１０の壁部１４の内側に接するように締結部材であるボルト６１とナット６２で締結するというシンプルな構成で、バッテリー受け部とバッテリーカバーの金属層が直接接して導通可能とすることができる。 Modes in which the battery receiving portion 10 and the battery cover 20 are in direct contact include the following.
FIG. 2 shows a schematic cross-sectional view of a portion where the battery receiving portion 10 and the battery cover 20 are in contact with each other. In this way, the fastening member is arranged such that the metal layer side (outer side) of the cover wall portion 24 of the battery cover, in which the upper side of the battery case 5 is the metal layer 28 , is in contact with the inner side of the wall portion 14 of the metal battery receiving portion 10 . With a simple configuration of fastening with a bolt 61 and a nut 62, the battery receiving portion and the metal layer of the battery cover can be in direct contact with each other to enable electrical continuity.

また、図３に示すようにバッテリーケース５の上部側が樹脂層２６であり下側、すなわちバッテリーケース５の内部側が金属層２８であるバッテリーカバーのカバー壁部２４の金属層側（内側）が、金属製のバッテリー受け部１０の壁部１４の外側に接するように締結部材であるボルト６１とナット６２で締結するというシンプルな構成で、バッテリー受け部とバッテリーカバーの金属層が直接接することができる。 Further, as shown in FIG. 3, the upper side of the battery case 5 is a resin layer 26 and the lower side, i.e., the inner side of the battery case 5 is a metal layer 28, and the metal layer side (inner side) of the cover wall portion 24 of the battery cover is With a simple configuration in which bolts 61 and nuts 62, which are fastening members, are fastened so as to be in contact with the outside of the wall 14 of the metal battery receiving part 10, the battery receiving part and the metal layer of the battery cover can be in direct contact. .

バッテリー受け部１０とバッテリーカバー２０とが締結補助具３０を介して接する態様としては、以下が挙げられる。なお、締結補助具は導電性を有し、金属製が好ましく、金属製のクリップ・座金等が挙げられる。これにより、バッテリー受け部１０とバッテリーカバー２０の金属層とをより確実に接することができ、導通させることができる。 Modes in which the battery receiving portion 10 and the battery cover 20 are in contact with each other via the fastening aid 30 include the following. The fastening aid has conductivity and is preferably made of metal, such as metal clips and washers. As a result, the battery receiving portion 10 and the metal layer of the battery cover 20 can be brought into contact with each other more reliably and can be electrically connected.

図４には、フランジ部を設けたバッテリー受け部１０とフランジ部を設けたバッテリーカバー２０とが接続締結された断面図を示す。バッテリーカバーのカバー壁部２４の端部は断面Ｌ字状にフランジ部を構成し、バッテリー受け部１０の壁部１４の端部にＬ字状にフランジ部を構成することにより、バッテリー受け部とバッテリーカバーとが締結できる。締結部材として金属製のボルト６１、ナット６２を用いれば、バッテリーカバーの上面の金属層２８が金属製の締結部材であるボルト、ナットを介して、金属製のバッテリー受け部と導通する。さらに、締結補助具３０である金属製の座金をボルト・ナットと接するようにバッテリー受け部及びバッテリーカバーとの間に挟むと、バッテリーカバーの金属層と金属製のバッテリー受け部との導通をより確実にすることができる。 FIG. 4 shows a sectional view in which the battery receiving portion 10 provided with the flange portion and the battery cover 20 provided with the flange portion are connected and fastened. The end portion of the cover wall portion 24 of the battery cover constitutes a flange portion having an L-shaped cross section, and the end portion of the wall portion 14 of the battery receiving portion 10 is formed with an L-shaped flange portion to form a battery receiving portion. It can be fastened with the battery cover. If metal bolts 61 and nuts 62 are used as the fastening members, the metal layer 28 on the upper surface of the battery cover is electrically connected to the metal battery receiving portion via the bolts and nuts, which are the metal fastening members. Furthermore, if a metal washer, which is the fastening aid 30, is sandwiched between the battery receiving portion and the battery cover so as to be in contact with the bolt and nut, the electrical connection between the metal layer of the battery cover and the metal battery receiving portion can be enhanced. can be certain.

図５は、別態様のバッテリー受け部１０のフランジ部とバッテリーカバー２０のフランジ部との締結された部分の拡大図である。図５に示すように、バッテリーカバーの端部の樹脂層２６がバッテリー受け部１０の端部に接するように配置され、バッテリーカバーの端部とバッテリー受け部の端部を重ねた状態で導電性を有する締結補助具３０が装着されている。該締結補助具は断面略コの字状の金属製のクリップである。該バッテリーカバーの端部と該バッテリー受け部の端部と該締結補助具にはそれぞれ穴を有しており、当該穴に締結部材を挿入して締結することにより、バッテリー受け部とバッテリーカバーとが締結補助具を介してより確実に接し導通している。 FIG. 5 is an enlarged view of a fastened portion between the flange portion of the battery receiving portion 10 and the flange portion of the battery cover 20 in another embodiment. As shown in FIG. 5, the resin layer 26 at the edge of the battery cover is placed in contact with the edge of the battery receiver 10, and the battery cover edge overlaps the battery receiver edge to provide a conductive layer. A fastening aid 30 having The fastening aid is a metal clip having a substantially U-shaped cross section. The end of the battery cover, the end of the battery receiving part, and the fastening aid each have a hole, and the battery receiving part and the battery cover are connected by inserting a fastening member into the hole and fastening. are in more reliable contact and conduction through the fastening aid.

また、別の態様としては図６に示すように、バッテリーカバー２０の端部に導電性を有する締結補助具３０が装着され、該締結補助具がバッテリーカバーの端部を挟んでバッテリー受け部１０に接するようにバッテリーカバーとバッテリー受け部とが配置される。該バッテリーカバーの端部と該バッテリー受け部と該締結補助具には、それぞれ穴を有しており、当該穴に締結部材を挿入して締結することにより、バッテリー受け部とバッテリーカバーとが締結補助具を介してより確実に接し導通している。 As another aspect, as shown in FIG. 6 , a conductive fastening aid 30 is attached to the end of the battery cover 20 , and the fastening aid sandwiches the end of the battery cover so that the battery receiving portion 10 is connected to the battery receiving portion 10 . A battery cover and a battery receiving portion are arranged so as to be in contact with each other. The end portion of the battery cover, the battery receiving portion, and the fastening aid each have a hole, and the battery receiving portion and the battery cover are fastened by inserting a fastening member into the hole and fastening. More reliable contact and conduction through auxiliary tools.

上記のように、バッテリーカバー２０の金属層２８と金属製のバッテリー受け部１０とが、直接又は導電性を有する締結補助具を介して接することで、バッテリー受け部から車体本体に電気的に接続し、アースを取ることができる。 As described above, the metal layer 28 of the battery cover 20 and the metal battery receiving portion 10 are in contact directly or via a conductive fastening aid, thereby electrically connecting the battery receiving portion to the vehicle body. and can be grounded.

バッテリーカバー２０の樹脂層２６は、射出成形可能な熱可塑性樹脂が好ましく、ポリプロピレン（ＰＰ）、ポリエチレン、ＡＢＳ樹脂（アクリロニトリル・ブタジエン・スチレン共重合合成樹脂）等がある。熱可塑性樹脂であれば、軽量化を実現でき、射出成形により容易に成形加工することができ、生産性が向上する。本実施例ではポリプロピレン及びＡＢＳを射出成型した。 The resin layer 26 of the battery cover 20 is preferably made of an injection-moldable thermoplastic resin such as polypropylene (PP), polyethylene, ABS resin (acrylonitrile-butadiene-styrene copolymer synthetic resin), and the like. If it is a thermoplastic resin, weight reduction can be achieved, and it can be easily molded by injection molding, improving productivity. Polypropylene and ABS were injection molded in this example.

バッテリーカバー２０の金属層２８は、亜鉛、アルミ、銅、これらの金属の合金等が好ましい。また、バッテリーカバーの金属層の厚みは、３０～１２０μｍ、より好ましくは４０～１００μｍが好ましい。金属皮膜は、目付として１００～５００ｇ／ｍ２が好ましく、１００～３５０ｇ／ｍ２、１００～３２０ｇ／ｍ２がより好ましい。熱可塑性樹脂層２６の上に金属の溶融粒子を吹き付けて被膜を形成する溶射、化学反応を誘起させて金属物質を堆積する化学的蒸着、その他スパッタリングや物理的蒸着による方法により、金属皮膜を形成することができる。 The metal layer 28 of the battery cover 20 is preferably zinc, aluminum, copper, alloys of these metals, or the like. The thickness of the metal layer of the battery cover is preferably 30-120 μm, more preferably 40-100 μm. The metal coating preferably has a basis weight of 100 to 500 g/m 2 , more preferably 100 to 350 g/m 2 and more preferably 100 to 320 g/m 2 . A metal film is formed by thermal spraying in which molten metal particles are sprayed onto the thermoplastic resin layer 26 to form a film, chemical vapor deposition in which a metal substance is deposited by inducing a chemical reaction, or other methods such as sputtering or physical vapor deposition. can do.

バッテリーカバー２０は、射出成型した基材である熱可塑性樹脂層２６をブラスト処理し、その基材表面の上に、金属溶射により金属皮膜を形成する。幅広い面積に金属層２８を形成するのには、金属溶射が好ましい。金属溶射は、燃焼ガスを熱源とするフレーム式溶射、高速フレーム式溶射、爆発溶射や電気を熱源とするアーク式溶射、プラズマ溶射、ＲＦプラズマ溶射、線爆溶射等を用いることができる。なかでもアーク溶射は、金属層の被膜形成速度が速く、金属皮膜の目付量を精度高く制御できる点で好ましい。アーク溶射は、二本の線状の金属の溶射材料間に高温で強い光を伴うアークを発生させ，その熱によって生じた溶融部分を圧縮ガス（メイン吐出ガス）のジェット気流によって微細化し、素地に吹き付けて皮膜を形成する溶射である。さらに、アークによる溶融金属の外周を、サブ圧縮空気の吐出により囲むように溶融金属を微粒化して、吹き付けるという（低温）アーク溶射が、樹脂層２６の変形・反り防止の点で更に好ましい。このアーク溶射により樹脂基材の上に金属層２８が積層された成形品ができる。金属層は、金属溶射により液滴状の溶融金属粒子が吹き付けられて偏平状に変形し、微細な気穴と重なりあって堆積する。 The battery cover 20 is formed by blasting a thermoplastic resin layer 26, which is an injection-molded base material, and forming a metal coating on the surface of the base material by metal spraying. Metal spraying is preferred for forming the metal layer 28 over a wide area. Metal spraying can be flame spraying using combustion gas as a heat source, high-speed flame spraying, explosive spraying, arc spraying using electricity as a heat source, plasma spraying, RF plasma spraying, line explosion spraying, or the like. Among them, arc spraying is preferable in that the metal layer can be formed at a high coating rate and the basis weight of the metal coating can be controlled with high accuracy. Arc thermal spraying generates an arc with a high temperature and strong light between two linear metal thermal spraying materials, and the molten part caused by the heat is refined by a jet stream of compressed gas (main discharge gas), and the base material It is thermal spraying that forms a coating by spraying onto the surface. Furthermore, (low-temperature) arc spraying, in which the molten metal is atomized and sprayed so as to surround the outer periphery of the molten metal by discharging sub-compressed air, is more preferable in terms of preventing deformation and warping of the resin layer 26. A molded article having a metal layer 28 laminated on a resin substrate is produced by this arc spraying. The metal layer is deformed into a flat shape by being sprayed with molten metal particles in the form of droplets by metal spraying, and is deposited overlapping fine pores.

実施例及び比較例について説明する。まず、バッテリーカバー２０の樹脂製基材を成形する。図７の表に示す樹脂の種類にて、各実施例及び各比較例のバッテリーカバー２０の基材である樹脂層２６を加熱溶融させて金型内に射出注入し、冷却・固化することで、射出成形した。バッテリーカバー２０は天井部２２とその周縁部でつながるカバー壁部２４とからなり、上記カバーは、その内部に収納するバッテリー及びその電気部品等の形状にあわせてわずかに凹凸を有し、その凹凸以外の部分は、略平坦な形状をしている。この平坦部分を一般部と呼び、一般部の厚みは約２ｍｍであった。 Examples and comparative examples will be described. First, the resin base material of the battery cover 20 is molded. With the types of resin shown in the table of FIG. 7, the resin layer 26, which is the base material of the battery cover 20 of each example and each comparative example, is heated and melted, injected into a mold, cooled and solidified. , injection molded. The battery cover 20 is composed of a ceiling portion 22 and a cover wall portion 24 connected at its peripheral edge portion. The other portion has a substantially flat shape. This flat portion was called a general portion, and the thickness of the general portion was about 2 mm.

次に、バッテリーカバーの基材に粒状熱硬化性プラスチック研磨剤（粒子径４００～５００μ）を０．６ＭＰａの圧力で噴射してブラスト処理を行い、この樹脂基材２６の粗面側に金属溶射する。金属溶射は、金属溶射装置を使用し、メイン吐出空気圧力０．４ＭＰａ、サブ吐出空気圧力０．４５ＭＰａ、ワイヤー供給速度は４．７ｍ／ｍｉｎ、ワイヤー径１．６ｍｍの亜鉛線を用いアーク照射を行った。溶射電圧は２２Ｖ、電流を８０Ａ～１５０Ａで、金属皮膜を形成した。金属溶射量として、一般部における目付量を表１に示す。 Next, a granular thermosetting plastic abrasive (particle diameter: 400 to 500 μm) is sprayed onto the base material of the battery cover at a pressure of 0.6 MPa for blasting, and the rough surface side of the resin base material 26 is sprayed with metal. do. Metal spraying uses a metal spraying device, main discharge air pressure is 0.4 MPa, sub discharge air pressure is 0.45 MPa, wire feed speed is 4.7 m/min, and arc irradiation is performed using a zinc wire with a wire diameter of 1.6 mm. gone. A metal coating was formed at a thermal spraying voltage of 22 V and a current of 80 A to 150 A. Table 1 shows the basis weight in the general part as the amount of metal spraying.

成形加工性、電磁波シールド性、重量等については、以下のようにの評価した。
（成形加工性）
成形加工性は、基材の樹脂成形時に引けや成形不良があるものは×、また、金属溶射後、樹脂層が変形・歪があるものは×とし、樹脂成型時の樹脂基材の成形不良がなく、かつ、金属溶射後も樹脂層が変形も歪もないものを○とした。 Moldability, electromagnetic wave shielding properties, weight, etc. were evaluated as follows.
(Moldability)
For molding processability, if there is shrinkage or molding defects during resin molding of the base material, it is x, and if the resin layer is deformed or distorted after metal spraying, it is x. A case where there was no deformation and no deformation or distortion of the resin layer even after metal spraying was evaluated as ◯.

（電磁波シールド性）
金属溶射後のバッテリーカバー２０成形品の天井部２２から、１００ｍｍ×１００ｍｍの試験片を切り出し、試験片の重量を測定し、１ｍ２当たりの重量（ｇ）及び溶射金属の塗布目付（ｇ／ｍ２）を求めた。さらに、溶射後の試験片をＫＥＣ法に準拠して近傍電界１０ＭＨｚ～１ＧＨｚの領域における電磁波シールド性（電界シールド・磁界シールド）を測定し、１００ＭＨｚにおける電界シールド及び磁界シールドの値を表１に示す。
電界シールド、磁界シールド共に、０ｄｂ以下から－３０ｄｂ未満を×、－３０ｄｂ以下から－４０ｄｂ未満を△（許容範囲内）、－４０ｄｂ以下から－１００ｄｂ未満を○、で評価した。１ｍ２当たりの重量は、５０００ｇ以上を×、４０００ｇ以上～５０００ｇ未満を△、３０００ｇ以上～４０００ｇ未満を○、２０００ｇ以上～３０００ｇ未満を◎、と評価した。なお、磁界シールドについては、樹脂を主材とした軽量化材料で高いレベルを実現することが難しいため、－３０ｄｂ以下から－４０ｄｂ未満は△で許容範囲内である。 (Electromagnetic wave shielding)
A test piece of 100 mm × 100 mm was cut out from the ceiling portion 22 of the molded battery cover 20 after metal spraying, and the weight of the test piece was measured. 2 ) was sought. Furthermore, the electromagnetic shielding properties (electric field shield/magnetic field shield) of the test piece after thermal spraying were measured in the near electric field range of 10 MHz to 1 GHz in accordance with the KEC method, and the values of the electric field shield and magnetic field shield at 100 MHz are shown in Table 1 .
Both the electric field shield and the magnetic field shield were evaluated by x when 0 db or less to less than −30 db, Δ (within the allowable range) by −30 db or less to less than −40 db, and ◯ when −40 db or less to less than −100 db. The weight per 1 m 2 was evaluated as X when 5000 g or more, Δ when 4000 g or more and less than 5000 g, ◯ when 3000 g or more and less than 4000 g, and ⊚ when 2000 g or more and less than 3000 g. As for magnetic field shielding, since it is difficult to achieve a high level of light-weight material mainly composed of resin, -30 db to less than -40 db is Δ and is within the allowable range.

（総合評価）
成形加工性、電界シールド、磁界シールド、１ｍ２当たりの重量のいずれかの項目において×があるものは、総合判定で×と評価し、成形加工性、電界シールド、磁界シールド、１ｍ２当たりの重量のいずれかの項目において×がなく△があるものは、総合判定で△と評価し、成形加工性、電界シールド、磁界シールド、１ｍ２当たりの重量のいずれの項目においても×及び△のないものは、総合判定で○と評価する。 (Comprehensive evaluation)
Moldability, electric field shielding, magnetic field shielding, weight per 1m2, if there is an x in any of the items, it will be evaluated as x in the comprehensive judgment, and molding workability, electric field shielding, magnetic field shielding, weight per 1m2 If there is no × in any of the items and there is a △, it will be evaluated as △ in the comprehensive judgment, and there will be no × or △ in any of the items of moldability, electric field shielding, magnetic field shielding, and weight per 1m2 is evaluated as ○ in the overall judgment.

実施例１では、樹脂としてＡＢＳを用いて、金型内に射出成形し、一般部の厚みが２ｍｍのバッテリーカバー２０の基材を得た。バッテリーカバーの天井部２０の上面側及びカバー壁部２４の外表面側をブラスト処理した。このブラスト処理面に対して亜鉛線を用いアーク照射を行った。金属溶射後の天井部２０から試験片を切り出し、樹脂基材２６の上に金属層２８が積層されているのを確認した。溶射金属の目付は７２ｇ／ｍ２であり、１ｍ２当たりの重量は２１９２ｇであった。基材の樹脂成形時に引けや成形不良がなく、また、金属溶射後、樹脂層２６が変形・歪もなく○であった。１００ＭＨｚにおける電界シールドは－６１ｄｂ（○）であり、１００ＭＨｚにおける磁界シールドは－３１ｄｂ（△）であり許容できる。成形加工性、電界シールド、１ｍ２当たりの重量のいずれの項目においても○であったが、磁界シールドが△であり、総合判定は△であった。 In Example 1, ABS was used as the resin and injection-molded in a mold to obtain a base material of the battery cover 20 having a general portion thickness of 2 mm. The upper surface side of the ceiling portion 20 of the battery cover and the outer surface side of the cover wall portion 24 were blasted. Arc irradiation was performed on this blasted surface using a zinc wire. A test piece was cut out from the ceiling portion 20 after metal spraying, and it was confirmed that the metal layer 28 was laminated on the resin base material 26 . The basis weight of the sprayed metal was 72 g/m 2 and the weight per m 2 was 2192 g. There was no shrinkage or defective molding during resin molding of the base material, and the resin layer 26 was neither deformed nor distorted after metal spraying. The electric shielding at 100 MHz is -61 db (O) and the magnetic shielding at 100 MHz is -31 db (Δ) which is acceptable. All of the items of moldability, electric field shielding, and weight per 1 m 2 were evaluated as ◯, but magnetic field shielding was evaluated as Δ, and overall evaluation was evaluated as Δ.

実施例２では、溶射金属の目付を９５ｇ／ｍ２とした以外は、実施例１と同じにして樹脂基材の上に金属層を溶射により積層した。樹脂層２６の上に金属層が積層された成形品の１ｍ２当たりの重量は２２１５ｇであり、基材の樹脂成形時に引けや成形不良がなく、かつ、金属溶射後も樹脂層が変形も歪もなく○であった。１００ＭＨｚにおける電界シールドは－６８ｄｂ（○）であったが、１００ＭＨｚにおける磁界シールドは－３７ｄｂ（△）であり許容できる。成形加工性、電界シールド、１ｍ２当たりの重量の項目は○であったが、磁界シールドが△であり、総合判定は△であった。 In Example 2, a metal layer was laminated on a resin substrate by thermal spraying in the same manner as in Example 1, except that the basis weight of the sprayed metal was 95 g/m 2 . The weight of the molded product in which the metal layer is laminated on the resin layer 26 is 2215 g per 1 m 2 , and there is no shrinkage or defective molding during resin molding of the base material, and the resin layer is not deformed or distorted even after metal spraying. It was ○ without any reason. The electric field shielding at 100 MHz was −68 db (◯), while the magnetic shielding at 100 MHz was −37 db (Δ), which is acceptable. The items of molding workability, electric field shielding, and weight per 1 m 2 were evaluated as ◯, but magnetic field shielding was evaluated as Δ, and the overall evaluation was evaluated as Δ.

実施例３では、溶射金属の目付を１００ｇ／ｍ２とした以外は、実施例１と同じにして樹脂基材の上に金属層２８を溶射により積層した。樹脂層２６の上に金属層が積層された成形品の１ｍ２当たりの重量は２２２０ｇであり、基材の樹脂成形時に引けや成形不良がなく、かつ、金属溶射後も樹脂層が変形も歪もなく○であった。１００ＭＨｚにおける電界シールドは－７２ｄｂ（○）であり、１００ＭＨｚにおける磁界シールドは－４１ｄｂ（○）であった。成形加工性、電界シールド、磁界シールド、１ｍ２当たりの重量のいずれの項目においても○であり、総合判定は○であった。 In Example 3, a metal layer 28 was laminated on a resin substrate by thermal spraying in the same manner as in Example 1, except that the basis weight of the sprayed metal was 100 g/m 2 . The weight of the molded product in which the metal layer is laminated on the resin layer 26 is 2220 g per 1 m 2 , and there is no shrinkage or molding defect during resin molding of the base material, and the resin layer is not deformed or distorted even after metal spraying. It was ○ without any reason. The electric shielding at 100 MHz was -72 db (o) and the magnetic shielding at 100 MHz was -41 db (o). It was rated ◯ in all of the items of moldability, electric field shielding, magnetic field shielding, and weight per 1 m 2 , and the overall evaluation was ◯.

実施例４では、溶射金属の目付を１２０ｇ／ｍ２とした以外は、実施例１と同じにして樹脂基材の上に金属層２８を溶射により積層した。樹脂層２６の上に金属層が積層された成形品の１ｍ２当たりの重量は２２４０ｇであり、基材の樹脂成形時に引けや成形不良がなく、かつ、金属溶射後も樹脂層が変形も歪もなく○であった。１００ＭＨｚにおける電界シールドは－７８ｄｂ（○）であり、１００ＭＨｚにおける磁界シールドは－４４ｄｂ（○）であった。成形加工性、電界シールド、磁界シールド、１ｍ２当たりの重量のいずれの項目においても○であり、総合判定は○であった。 In Example 4, the metal layer 28 was laminated on the resin substrate by thermal spraying in the same manner as in Example 1, except that the basis weight of the sprayed metal was 120 g/m 2 . The weight of the molded product in which the metal layer is laminated on the resin layer 26 is 2240 g per 1 m 2 , and there is no shrinkage or defective molding during resin molding of the base material, and the resin layer is not deformed or distorted even after metal spraying. It was ○ without any reason. The electric shielding at 100 MHz was -78 db (o) and the magnetic shielding at 100 MHz was -44 db (o). It was rated ◯ in all of the items of moldability, electric field shielding, magnetic field shielding, and weight per 1 m 2 , and the overall evaluation was ◯.

実施例５では、溶射金属の目付を１５０ｇ／ｍ２とした以外は、実施例１と同じにして樹脂基材の上に金属層２８を溶射により積層した。樹脂層２６の上に金属層が積層された成形品の１ｍ２当たりの重量は２２７０ｇであり、基材の樹脂成形時に引けや成形不良がなく、かつ、金属溶射後も樹脂層が変形も歪もなく○であった。１００ＭＨｚにおける電界シールドは－８２ｄｂ（○）であり、１００ＭＨｚにおける磁界シールドは－４９ｄｂ（○）であった。成形加工性、電界シールド、磁界シールド、１ｍ２当たりの重量のいずれの項目においても○であり、総合判定は○であった。 In Example 5, the metal layer 28 was laminated on the resin substrate by thermal spraying in the same manner as in Example 1, except that the basis weight of the sprayed metal was 150 g/m 2 . The weight of the molded product in which the metal layer is laminated on the resin layer 26 is 2270 g per 1 m 2 , and there is no shrinkage or defective molding during resin molding of the base material, and the resin layer is not deformed or distorted even after metal spraying. It was ○ without any reason. The electric shielding at 100 MHz was -82 db (o) and the magnetic shielding at 100 MHz was -49 db (o). It was rated ◯ in all of the items of moldability, electric field shielding, magnetic field shielding, and weight per 1 m 2 , and the overall evaluation was ◯.

実施例６では、溶射金属の目付を２７０ｇ／ｍ２とした以外は、実施例１と同じにして樹脂基材の上に金属層を溶射により積層した。樹脂層の上に金属層が積層された成形品の１ｍ２当たりの重量は２３９０ｇであり、基材の樹脂成形時に引けや成形不良がなく、かつ、金属溶射後も樹脂層が変形も歪もなく○であった。１００ＭＨｚにおける電界シールドは－８５ｄｂ（○）であり、１００ＭＨｚにおける磁界シールドは－５９ｄｂ（○）であった。成形加工性、電界シールド、磁界シールド、１ｍ２当たりの重量のいずれの項目においても○であり、総合判定は○であった。 In Example 6, a metal layer was laminated on a resin substrate by thermal spraying in the same manner as in Example 1, except that the basis weight of the sprayed metal was 270 g/m 2 . The weight of the molded product in which the metal layer is laminated on the resin layer is 2390 g per 1 m 2 , and there is no shrinkage or molding defects during resin molding of the base material, and the resin layer is neither deformed nor distorted after metal spraying. It was ○ without. The electric shielding at 100 MHz was -85 db (o) and the magnetic shielding at 100 MHz was -59 db (o). It was rated ◯ in all of the items of moldability, electric field shielding, magnetic field shielding, and weight per 1 m 2 , and the overall evaluation was ◯.

実施例７では、樹脂としてＰＰ（ポリプロピレン）を用いて、金型内に射出成形し、一般部の厚みが２ｍｍのバッテリーカバー２０の基材を成形し、溶射金属の目付を３２０ｇ／ｍ２とした以外は、実施例１と同じにして樹脂基材の上に金属層２８を溶射により積層した。樹脂層２６の上に金属層が積層された成形品の１ｍ２当たりの重量は２１４０ｇであり、基材の樹脂成形時に引けや成形不良がなく、かつ、金属溶射後も樹脂層が変形も歪もなく○であった。１００ＭＨｚにおける電界シールドは－９２ｄｂ（○）であり、１００ＭＨｚにおける磁界シールドは－８０ｄｂ（○）であった。成形加工性、電界シールド、磁界シールド、１ｍ２当たりの重量のいずれの項目においても○であり、総合判定は○であった。 In Example 7, PP (polypropylene) was used as the resin, and injection molding was performed in a mold to form the base material of the battery cover 20 having a general thickness of 2 mm, and the basis weight of the sprayed metal was 320 g/m 2 . A metal layer 28 was laminated on the resin substrate by thermal spraying in the same manner as in Example 1, except that the metal layer 28 was formed. The weight of the molded product in which the metal layer is laminated on the resin layer 26 is 2140 g per 1 m 2 , and there is no shrinkage or defective molding during resin molding of the base material, and the resin layer is not deformed or distorted even after metal spraying. It was ○ without any reason. The electric shielding at 100 MHz was -92 db (o) and the magnetic shielding at 100 MHz was -80 db (o). It was rated ◯ in all of the items of moldability, electric field shielding, magnetic field shielding, and weight per 1 m 2 , and the overall evaluation was ◯.

比較例１では、樹脂としてＡＢＳ樹脂に金属であるステンレス繊維を１．８重量％混入させた金属繊維入り樹脂を用いて、金型内に射出成形し、一般部の厚みが２ｍｍのバッテリーカバーの基材を得た。ブラスト処理および金属溶射は行わす、１ｍ２当たりの重量は２３４０ｇであった。基材の樹脂成形時に引けや成形不良がなく、また、金属溶射後、樹脂層が変形・歪もなく○であった。１００ＭＨｚにおける電界シールドは－６４ｄｂ（○）であったが、１００ＭＨｚにおける磁界シールドは－２２ｄｂ（×）であった。成形加工性、電界シールド、１ｍ２当たりの重量の項目は○であったが、磁界シールドが×であり、総合判定は×であった。 In Comparative Example 1, a metal fiber-containing resin in which 1.8% by weight of metal stainless steel fiber was mixed with ABS resin was used as the resin, and injection molding was performed in a mold to form a battery cover with a general portion having a thickness of 2 mm. A substrate was obtained. Blasted and metal sprayed, weight was 2340 g/m 2 . There was no shrinkage or defective molding during resin molding of the base material, and no deformation or distortion occurred in the resin layer after metal spraying. The electric shielding at 100 MHz was -64 db (o), while the magnetic shielding at 100 MHz was -22 db (x). The items of molding workability, electric field shielding, and weight per 1 m 2 were evaluated as ◯, but the items of magnetic field shielding were evaluated as X, and the overall evaluation was evaluated as X.

比較例２では、０．７ｍｍの厚みの鋼板を用いて、バッテリーカバーの基材を得た。ブラスト処理および金属溶射は行わず、１ｍ２当たりの重量は５４９５ｇであった。鋼板からバッテリーカバーを得るには、大型のプレス機と溶接ロボット等の大型設備が必要となる点で△と評価する。１００ＭＨｚにおける電界シールドは－９３ｄｂ（○）であり、１００ＭＨｚにおける磁界シールドは－８１ｄｂ（○）であった。成形加工性は△であり、電界シールド、磁界シールドが○であったが、１ｍ２当たりの重量の項目は×であり、総合判定は×であった。 In Comparative Example 2, a steel plate with a thickness of 0.7 mm was used to obtain the base material of the battery cover. It was not blasted or metal sprayed and had a weight of 5495 g per square meter. In order to obtain a battery cover from a steel plate, large equipment such as a large press machine and a welding robot is required, so it is evaluated as △. The electric shielding at 100 MHz was -93 db (o) and the magnetic shielding at 100 MHz was -81 db (o). The moldability was evaluated as Δ, the electric field shield and magnetic field shield were evaluated as ◯, but the item of weight per 1 m 2 was evaluated as x, and the overall evaluation was evaluated as x.

以上のように、電磁波シールド性は、ＫＥＣ法（１００ＭＨｚ）で電界シールドと磁界シールドについて確認した。各実施例の電界シールド性は１００ＭＨｚにおいて、－６１ｄｂ～－９２ｄｂであった。また磁界シールド性は１００ＭＨｚにおいて、－３１ｄｂ～－８０ｄｂであった。これにより、本発明は電界シールドと磁界シールドの両方が優れ、電磁波シールド性が優れており、また成形加工性、１ｍ２当たりの重量（軽量化）にも優れている。 As described above, the electromagnetic wave shielding properties were confirmed for the electric field shield and the magnetic field shield by the KEC method (100 MHz). The electric field shielding properties of each example ranged from -61 db to -92 db at 100 MHz. The magnetic field shielding property was -31db to -80db at 100MHz. As a result, the present invention is excellent in both electric field shielding and magnetic field shielding, is excellent in electromagnetic wave shielding properties, and is also excellent in moldability and weight per square meter (weight reduction).

５ バッテリーケース
７ バッテリー収納空間
１０ バッテリー受け部
１２ バッテリー受け部の底部
１４ バッテリー受け部の壁部
２０ バッテリーカバー
２２ 天井部
２４ カバー壁部
２６ 樹脂層
２８ 金属層
３０ 締結補助具
６１ 締結部材（ボルト）
６２ 締結部材（ナット）
８０ 電気自動車
８５ 車両本体 5 Battery case 7 Battery storage space 10 Battery receiving part 12 Bottom part of battery receiving part 14 Wall part of battery receiving part 20 Battery cover 22 Ceiling part 24 Cover wall part 26 Resin layer 28 Metal layer 30 Fastening aid 61 Fastening member (bolt)
62 fastening member (nut)
80 electric vehicle 85 vehicle body

Claims (5)

バッテリーを収納する、底部及び該底部の周縁を囲む壁部からなる収納空間を有する金属製のバッテリー受け部と、該バッテリー受け部の前記収納空間を覆うバッテリーカバーとを備え、
前記バッテリーカバーは、樹脂層とその片面に金属層が積層された積層体であり、前記バッテリー受け部を覆う天井部と、該天井部の周縁を囲むカバー壁部とを備え、
前記バッテリーカバーの前記金属層は、前記樹脂層の外表面側に積層され、
前記カバー壁部の外表面側の前記金属層が前記壁部の内表面に直接接するように前記バッテリー受け部と前記バッテリーカバーとが締結されていることを特徴とするバッテリーケース。 A metal battery receiving part having a storage space consisting of a bottom part and a wall part surrounding the periphery of the bottom part for storing the battery, and a battery cover covering the storage space of the battery receiving part,
The battery cover is a laminate in which a resin layer and a metal layer are laminated on one side thereof, and includes a ceiling portion that covers the battery receiving portion and a cover wall portion that surrounds the periphery of the ceiling portion,
The metal layer of the battery cover is laminated on the outer surface side of the resin layer ,
A battery case, wherein the battery receiving portion and the battery cover are fastened so that the metal layer on the outer surface side of the cover wall portion is in direct contact with the inner surface of the wall portion . バッテリーを収納する、底部及び該底部の周縁を囲む壁部からなる収納空間を有する金属製のバッテリー受け部と、該バッテリー受け部の前記収納空間を覆うバッテリーカバーとを備え、A metal battery receiving part having a storage space consisting of a bottom part and a wall part surrounding the periphery of the bottom part for storing the battery, and a battery cover covering the storage space of the battery receiving part,
前記バッテリーカバーは、樹脂層とその片面に金属層が積層された積層体であり、前記バッテリー受け部を覆う天井部と、該天井部の周縁を囲むカバー壁部とを備え、The battery cover is a laminate in which a resin layer and a metal layer are laminated on one side thereof, and includes a ceiling portion that covers the battery receiving portion and a cover wall portion that surrounds the periphery of the ceiling portion,
前記バッテリーカバーの前記金属層は、前記樹脂層の内表面側に積層され、The metal layer of the battery cover is laminated on the inner surface side of the resin layer,
前記カバー壁部の内表面側の前記金属層が前記壁部の外表面に直接接するように前記バッテリー受け部と前記バッテリーカバーとが締結されていることを特徴とするバッテリーケース。A battery case, wherein the battery receiving portion and the battery cover are fastened so that the metal layer on the inner surface side of the cover wall portion is in direct contact with the outer surface of the wall portion. バッテリーを収納する、底部及び該底部の周縁を囲む壁部からなる収納空間を有する金属製のバッテリー受け部と、該バッテリー受け部の前記収納空間を覆うバッテリーカバーとを備え、A metal battery receiving part having a storage space consisting of a bottom part and a wall part surrounding the periphery of the bottom part for storing the battery, and a battery cover covering the storage space of the battery receiving part,
前記バッテリーカバーは、樹脂層とその片面に金属層が積層された積層体であり、前記バッテリー受け部を覆う天井部と、該天井部の周縁を囲むカバー壁部とを備え、The battery cover is a laminate in which a resin layer and a metal layer are laminated on one side thereof, and includes a ceiling portion that covers the battery receiving portion and a cover wall portion that surrounds the periphery of the ceiling portion,
前記バッテリー受け部には、前記壁部の端部から外側に張り出したフランジ部が設けられ、The battery receiving portion is provided with a flange portion projecting outward from an end portion of the wall portion,
前記バッテリーカバーには、前記カバー壁部の端部から外側に張り出すとともに、前記樹脂層の上面に前記金属層が積層されたカバーフランジ部が設けられ、The battery cover is provided with a cover flange portion projecting outward from an end portion of the cover wall portion and having the metal layer laminated on the upper surface of the resin layer,
前記フランジ部と前記カバーフランジ部とが積層された状態で、前記フランジ部の下面と前記カバーフランジ部の上面の前記金属層とを前記フランジ部と前記カバーフランジ部との外側から接続する導電性の締結補助具が装着されていることを特徴とするバッテリーケース。In a state in which the flange portion and the cover flange portion are laminated, a conductive property that connects the lower surface of the flange portion and the metal layer on the upper surface of the cover flange portion from the outside of the flange portion and the cover flange portion. A battery case characterized in that it is equipped with a fastening aid of. バッテリーを収納する、底部及び該底部の周縁を囲む壁部からなる収納空間を有する金属製のバッテリー受け部と、該バッテリー受け部の前記収納空間を覆うバッテリーカバーとを備え、A metal battery receiving part having a storage space consisting of a bottom part and a wall part surrounding the periphery of the bottom part for storing the battery, and a battery cover covering the storage space of the battery receiving part,
前記バッテリーカバーは、樹脂層とその片面に金属層が積層された積層体であり、前記バッテリー受け部を覆う天井部と、該天井部の周縁を囲むカバー壁部とを備え、The battery cover is a laminate in which a resin layer and a metal layer are laminated on one side thereof, and includes a ceiling portion that covers the battery receiving portion and a cover wall portion that surrounds the periphery of the ceiling portion,
前記バッテリー受け部には、前記壁部の端部から外側に張り出したフランジ部が設けられ、The battery receiving portion is provided with a flange portion projecting outward from an end portion of the wall portion,
前記バッテリーカバーには、前記カバー壁部の端部から外側に張り出すとともに、前記樹脂層の上面に前記金属層が積層されたカバーフランジ部が設けられ、The battery cover is provided with a cover flange portion projecting outward from an end portion of the cover wall portion and having the metal layer laminated on the upper surface of the resin layer,
前記フランジ部と前記カバーフランジ部とが積層された状態で、前記フランジ部の上面と前記カバーフランジ部の上面の前記金属層とを前記カバーフランジ部の外側から接続する導電性の締結補助具が装着されていることを特徴とするバッテリーケース。A conductive fastening aid that connects the upper surface of the flange portion and the metal layer on the upper surface of the cover flange portion from the outside of the cover flange portion in a state in which the flange portion and the cover flange portion are laminated. A battery case, characterized in that it is attached. 前記フランジ部と前記カバーフランジ部と前記締結補助具とは、それぞれ穴を有し、該穴に締結部材が挿入されることで締結されていることを特徴とする請求項３又は４に記載のバッテリーケース。 5. The flange portion, the cover flange portion, and the fastening aid according to claim 3 or 4, wherein each has a hole, and fastening members are inserted into the holes to fasten. battery case.
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