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JP7540314B2 - Electromagnetic wave shielding structure - Google Patents
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JP7540314B2 - Electromagnetic wave shielding structure - Google Patents

Electromagnetic wave shielding structure Download PDF

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JP7540314B2
JP7540314B2 JP2020201232A JP2020201232A JP7540314B2 JP 7540314 B2 JP7540314 B2 JP 7540314B2 JP 2020201232 A JP2020201232 A JP 2020201232A JP 2020201232 A JP2020201232 A JP 2020201232A JP 7540314 B2 JP7540314 B2 JP 7540314B2
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battery stack
battery
conductive cloth
electromagnetic wave
wave shielding
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JP2022089025A (en
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雄紀 奥野
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Toyota Motor Corp
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Toyota Motor Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/002—Casings with localised screening
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Battery Mounting, Suspending (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Description

本発明は、電池スタックを導電布で覆うことによって、電池スタックから放射される電磁波を遮蔽する電磁波遮蔽構造に関する。 The present invention relates to an electromagnetic wave shielding structure that blocks electromagnetic waves emitted from a battery stack by covering the battery stack with a conductive cloth.

電動車両などでは、大容量の電池パックを搭載する。この電池パックは、複数の電池セルを積層して形成した電池スタックを複数個まとめて構成される。電池パックの出力は、駆動モータの駆動電流などに利用され、各電池スタックには、電池パックの出力に応じた電流が流れる。 Electric vehicles and other vehicles are equipped with large-capacity battery packs. These battery packs are made up of multiple battery stacks, each of which is made up of multiple battery cells stacked together. The output of the battery packs is used to provide the driving current for the drive motor, and a current corresponding to the output of the battery pack flows through each battery stack.

ここで、各電池スタックに流れる電流には、各種の原因で高周波が重畳され、従って電池スタックから電磁波が放射される。電磁波は、各種電化製品などからも放射されているものではあるが、この放射をできるだけ少なくしたいという要求があり、電池パックを金属ケースで覆う場合が多い。 Here, high frequency waves are superimposed on the current flowing through each battery stack for various reasons, and as a result, electromagnetic waves are emitted from the battery stack. Although electromagnetic waves are also emitted from various electrical appliances, there is a demand to reduce this radiation as much as possible, and so battery packs are often covered with metal cases.

ここで、電磁波遮蔽材としては、金属板、金属メッシュの他、電磁波遮蔽機能を持った布も提案されている（特許文献１参照）。布は柔軟であり、その配置の自由度が広がる。 Here, in addition to metal plates and metal meshes, cloth with electromagnetic wave shielding properties has also been proposed as an electromagnetic wave shielding material (see Patent Document 1). Cloth is flexible, allowing greater freedom in its placement.

特開平１０－１６８７０２号公報Japanese Patent Application Publication No. 10-168702

ここで、電磁波遮蔽機能を有する布を電池スタックの電磁波遮蔽に適用することも考えられるが、その電磁波遮蔽機能は金属ケースとは異なり、さらなる検討が必要と考えられる。 Here, it is possible to consider using fabric with electromagnetic wave shielding properties to provide electromagnetic wave shielding for the battery stack, but the electromagnetic wave shielding function will differ from that of a metal case, and further consideration is thought to be required.

本発明に係る電磁波遮蔽構造は、複数の電池セルから構成される電池スタックと、前記電池スタックの上面において前記複数の電池セル間を接続するセル間バスバと、前記電池スタックの少なくとも上側に配設される導電布と、を備え、少なくとも、前記セル間バスバの上側に重なり前記電池スタックの上側に配設される前記導電布の厚みを、前記電池スタックの上面の他の部分に配設される前記導電布の厚みと比較して厚く設定する。 The electromagnetic wave shielding structure according to the present invention comprises a battery stack composed of a plurality of battery cells, an inter-cell bus bar that connects the plurality of battery cells on the upper surface of the battery stack, and a conductive cloth disposed on at least the upper side of the battery stack, and at least the thickness of the conductive cloth that overlaps the upper side of the inter-cell bus bar and is disposed on the upper side of the battery stack is set to be thicker than the thickness of the conductive cloth disposed on other parts of the upper surface of the battery stack.

本発明に係る電磁波遮蔽構造は、複数の電池セルから構成される電池スタックと、前記電池スタックの上面において前記複数の電池セル間を接続するセル間バスバと、前記電池スタックの少なくとも上側に配設される導電布と、電磁波を遮蔽できる金属製であって前記複数の電池セルを結束する結束バンドと、を備え、少なくとも、前記結束バンドと重なり前記電池スタックの上側に配設される前記導電布の厚みを、前記電池スタックの上面の他の部分に配設される前記導電布の厚みと比べて薄く設定する。 The electromagnetic wave shielding structure of the present invention comprises a battery stack composed of a plurality of battery cells, an inter-cell bus bar connecting the plurality of battery cells on the upper surface of the battery stack, a conductive cloth arranged on at least the upper side of the battery stack, and a cable tie made of a metal capable of shielding electromagnetic waves and binding the plurality of battery cells, wherein at least the thickness of the conductive cloth overlapping the cable tie and arranged on the upper side of the battery stack is set to be thinner than the thickness of the conductive cloth arranged in other parts of the upper surface of the battery stack.

前記導電布の厚みは、前記導電布の重ね合わせる枚数を変化させることで変更される、とよい。 The thickness of the conductive cloth can be changed by changing the number of layers of the conductive cloth.

前記電池スタックの上面を覆う樹脂基板を有し、前記導電布は、前記樹脂基板の上面に配置される、とよい。 It is preferable that the battery stack has a resin substrate covering the upper surface thereof, and the conductive cloth is disposed on the upper surface of the resin substrate.

本発明によれば、導電布を用いるため、比較的軽量で電池スタックからの電磁波を遮蔽することができ、導電布の厚みを適切に設定しているため、電池スタックの構成に応じた効果的な電磁波遮蔽が行える。 The present invention uses conductive cloth, which is relatively lightweight and can shield electromagnetic waves from the battery stack. The thickness of the conductive cloth is appropriately set, allowing for effective electromagnetic wave shielding according to the configuration of the battery stack.

実施形態に係る電磁波遮蔽構造を有する電池スタックの構成を示す斜視図である。1 is a perspective view showing a configuration of a battery stack having an electromagnetic wave shielding structure according to an embodiment. 電磁波遮蔽構造を取り除いた状態の電池スタックを示す斜視図であるFIG. 1 is a perspective view showing a battery stack with an electromagnetic wave shielding structure removed; 電池スタック１０を電池セル１２の積層方向から見た正面図である。FIG. 2 is a front view of the battery stack 10 as viewed from the stacking direction of the battery cells 12. 電磁波の放出状態を、放射磁界（磁界強度）を検出した結果によって示す図である。1 is a diagram showing the emission state of electromagnetic waves based on the results of detecting a radiated magnetic field (magnetic field strength).

以下、本発明の実施形態について、図面に基づいて説明する。なお、本発明は、ここに記載される実施形態に限定されるものではない。 The following describes an embodiment of the present invention with reference to the drawings. Note that the present invention is not limited to the embodiment described here.

「全体構成」
図１は、実施形態に係る電磁波遮蔽構造を有する電池スタックの構成を示す斜視図である。図２は、電磁波遮蔽構造を取り除いた状態の電磁スタックを示す斜視図である。 "Overall Configuration"
Fig. 1 is a perspective view showing the configuration of a battery stack having an electromagnetic wave shielding structure according to an embodiment, and Fig. 2 is a perspective view showing the electromagnetic stack in a state where the electromagnetic wave shielding structure has been removed.

図２に示すように、電池スタック１０は、複数の電池セル１２が１列に積層されて構成された積層体を有する。各電池セル１２は、厚みが薄い直方体形状であり、厚み方向に積層され、電池スタック１０は、細長い直方体形状となっている。 As shown in FIG. 2, the battery stack 10 has a stacked body formed by stacking a number of battery cells 12 in a row. Each battery cell 12 has a thin rectangular parallelepiped shape and is stacked in the thickness direction, so that the battery stack 10 has an elongated rectangular parallelepiped shape.

各電池セル１２は、例えばリチウムイオン電池などの二次電池であり、ケースの上面に正極と負極が設けられている。電池スタック１０は、セル間バスバ１４によって、複数の電池セル１２が並列接続されてセルグループが形成されるとともに、このセルグループが順次直列接続されて構成されている。そして、電池スタック１０の一端側に正極側のセル間バスバ１４に接続される正極の端子１６、他端側に負極側のセル間バスバ１４に接続される負極の端子１６が設けられ、これら端子１６が電池スタック１０の出力端子になっている。ここで、並列、直列する電池セル１２の個数は１以上の任意の個数にすることができるが、例えば図における手前の端子１６が正極であれば、手前の２つの電池セル１２は、右側が正極で、左側が負極、次の２つの電池セル１２は、左側が正極で右側が負極であり、最も奥の２つの電池セル１２は右側が負極であり、これに接続される端子１６が負極となる。 Each battery cell 12 is a secondary battery such as a lithium ion battery, and has a positive electrode and a negative electrode on the top surface of the case. The battery stack 10 is configured by connecting a plurality of battery cells 12 in parallel to form cell groups by the inter-cell bus bars 14, and then sequentially connecting these cell groups in series. A positive terminal 16 connected to the positive inter-cell bus bar 14 is provided on one end of the battery stack 10, and a negative terminal 16 connected to the negative inter-cell bus bar 14 is provided on the other end, and these terminals 16 serve as the output terminals of the battery stack 10. Here, the number of battery cells 12 connected in parallel or in series can be any number greater than or equal to one. For example, if the terminal 16 at the front in the figure is a positive electrode, the two battery cells 12 at the front have a positive electrode on the right side and a negative electrode on the left side, the next two battery cells 12 have a positive electrode on the left side and a negative electrode on the right side, and the two battery cells 12 at the back have a negative electrode on the right side, and the terminal 16 connected to them is a negative electrode.

電池セル１２の積層体の前後の端部には、エンドプレート１８が配置されており、このエンドプレート１８を含め、電池セル１２の積層体の前後端を４本の結束バンド２０によって固定している。各結束バンド２０は、両端の端板２０ａとバンド本体２０ｂを有し、端板２０ａが電池セル１２の積層体の前後端に位置し、バンド本体２０ｂが上面または底面に位置する。４本の結束バンド２０は、それぞれが電池セル１２の積層体を積層方向の両端から内側に向けて抑えることで、積層体を一体化する。なお、セル間バスバ１４は導電性の金属で構成され、また結束バンド２０も所定の弾力を持ち強度の大きな金属から構成される。 End plates 18 are arranged at the front and rear ends of the stack of battery cells 12, and the front and rear ends of the stack of battery cells 12, including the end plates 18, are fixed by four cable ties 20. Each cable tie 20 has end plates 20a and a band body 20b at both ends, with the end plates 20a located at the front and rear ends of the stack of battery cells 12 and the band body 20b located on the top or bottom surface. Each of the four cable ties 20 presses the stack of battery cells 12 inward from both ends in the stacking direction, thereby integrating the stack. The inter-cell bus bar 14 is made of a conductive metal, and the cable ties 20 are also made of a metal with a certain degree of elasticity and high strength.

そして、図示するように、電池スタック１０の上面および側面の上部を覆って遮蔽体３０が配置されている。この遮蔽体３０は、電池スタック１０から放射される電磁波を遮蔽する。 As shown in the figure, a shield 30 is disposed to cover the top surface and the upper part of the side surface of the battery stack 10. This shield 30 blocks electromagnetic waves emitted from the battery stack 10.

「遮蔽体３０の構成」
図３は、電池スタック１０を電池セル１２の積層方向から見た正面図である。図３に示すように、遮蔽体３０は、細長の直方体状の電池スタック１０の上面および側面上部を覆い下方が開放したＵ字状断面を有する樹脂基板３２と、その上面に配置された導電布３４とから構成される。 "Configuration of shield 30"
Fig. 3 is a front view of the battery stack 10 as viewed from the stacking direction of the battery cells 12. As shown in Fig. 3, the shield 30 is composed of a resin substrate 32 that covers the top surface and upper side surfaces of the elongated rectangular parallelepiped battery stack 10 and has a U-shaped cross section that is open downward, and a conductive cloth 34 that is disposed on the top surface of the resin substrate 32.

導電布３４は、樹脂基板３２を全体的に覆う第１導電布３４ａと、第１導電布３４ａの上に重ねて配置される第２導電布３４ｂからなっている。そして、第２導電布３４ｂは、セル間バスバ１４に重なる部分と、結束バンド２０のバンド本体２０ｂの側方に当たる部分に配置された帯状である。そして、この第２導電布３４ｂは、図３において点線の丸印で示した、結束バンド２０のバンド本体２０ｂの上方、２つのセル間バスバ１４の間に当たる積層体の中央の上方には配置されていない。なお、導電布３４の樹脂基板３２への接合、導電布３４同士の接合には、樹脂製の接着剤などを用いるとよい。 The conductive cloth 34 is composed of a first conductive cloth 34a that entirely covers the resin substrate 32, and a second conductive cloth 34b that is placed on top of the first conductive cloth 34a. The second conductive cloth 34b is a strip that is placed on the portion that overlaps the inter-cell bus bar 14 and on the side of the band body 20b of the cable tie 20. The second conductive cloth 34b is not placed above the band body 20b of the cable tie 20 or above the center of the laminate between the two inter-cell bus bars 14, as shown by the dotted circle in FIG. 3. A resin adhesive or the like may be used to bond the conductive cloth 34 to the resin substrate 32 and to bond the conductive cloths 34 together.

図４は、電磁波の放出状態を、放射磁界の磁界強度を検出した結果によって示す図である。図４において、（ａ）は遮蔽体３０を設けない場合、（ｂ）は遮蔽体３０を設けた場合を示す。なお、図において、放射磁界は、黒に近いほど大きいことを示す。 Figure 4 shows the state of electromagnetic wave emission based on the results of detecting the magnetic field strength of the radiated magnetic field. In Figure 4, (a) shows the case where the shield 30 is not provided, and (b) shows the case where the shield 30 is provided. Note that in the figure, the closer to black the radiated magnetic field is, the stronger it is.

このように、遮蔽体３０を設けない場合には、放射磁界が大きく広がるのに対し、遮蔽体３０を設けることで、放射磁界が小さくなっていることがわかる。特に、図において点線の丸印で示した部分においては放射磁界が比較的小さいため、導電布３４を二重にしなくても十分な放射磁界の減衰効果が得られており、効率的な放射磁界の低減が行われていることがわかる。また、結束バンド２０の側方の領域も導電布３４を二重にすることで、この方向への放射磁界を効果的に減衰することができる。このように、本実施形態では、導電布３４の厚みを適切に設定しているため、電池スタックの構成に応じた効果的な電磁波遮蔽が行える。また、導電布３４の厚みの変更は、導電布の枚数の変更によって行っている。従って、その厚みの変更が容易であり、１種類の導電布を用意すればよいため、形成するのが容易であり、また安価となる。もちろん、複数の厚みの導電布を用意して厚みを変更しても構わない。 As described above, when the shield 30 is not provided, the radiated magnetic field spreads widely, whereas when the shield 30 is provided, the radiated magnetic field is reduced. In particular, since the radiated magnetic field is relatively small in the portion indicated by the dotted circle in the figure, a sufficient radiated magnetic field attenuation effect is obtained without doubling the conductive cloth 34, and it can be seen that the radiated magnetic field is efficiently reduced. In addition, by doubling the conductive cloth 34 in the side area of the cable tie 20, the radiated magnetic field in this direction can be effectively attenuated. In this way, in this embodiment, the thickness of the conductive cloth 34 is appropriately set, so that effective electromagnetic wave shielding according to the configuration of the battery stack can be performed. In addition, the thickness of the conductive cloth 34 is changed by changing the number of conductive cloths. Therefore, the thickness can be easily changed, and it is only necessary to prepare one type of conductive cloth, so that it is easy to form and inexpensive. Of course, it is also possible to prepare conductive cloths of multiple thicknesses and change the thickness.

「その他の構成」
本実施形態においては、導電布３４を用いた。導電布３４としては、導電性の繊維による織布など各種のものを採用できるが、例えば特許文献１に示したようなものの他、金属コーティングを施したポリエステル繊維の織布や、ポリエステル系短繊維から形成される不織布に金属めっき処理を施したものなどを採用することができる。 "Other Configurations"
In this embodiment, a conductive cloth 34 is used. As the conductive cloth 34, various types of cloth such as a woven cloth made of conductive fibers can be used, for example, as shown in Patent Document 1, as well as a woven cloth made of polyester fibers with a metal coating, a nonwoven cloth made of polyester staple fibers that has been subjected to a metal plating treatment, and the like can be used.

また、導電布３４は、車両における電池スタック１０の電磁波遮蔽以外にも用いることができる。例えば、電動車両は、複数の電池スタック１０から構成される電池パックの出力によりモータを駆動して走行する。本実施形態によれば、各電池スタック１０に電磁波を遮蔽する遮蔽体３０を配置することで、電池パックのケース（特に、上側を覆うアッパーケース）を金属製とする必要がなく、樹脂製とすることができ、軽量化を図ることができる。さらに、電池パックには、サービスプラグが設けられ、これを引き抜くことによって電池パックの出力を切断することができる。このサービスプラグは、車室側から操作できるように、車室のフロアから突出するように設けられ、ここを覆うように金属カバーが設けられる。このサービスプラグを覆う金属カバーについても、樹脂の表面に導電布を配置した遮蔽体に代えることで軽量化を図ることができる。 The conductive cloth 34 can also be used for purposes other than electromagnetic wave shielding of the battery stack 10 in a vehicle. For example, an electric vehicle runs by driving a motor with the output of a battery pack composed of multiple battery stacks 10. According to this embodiment, by arranging a shield 30 that shields electromagnetic waves in each battery stack 10, it is not necessary to make the battery pack case (particularly the upper case covering the upper side) out of metal, but it can be made of resin, thereby achieving weight reduction. Furthermore, the battery pack is provided with a service plug, which can be pulled out to cut off the output of the battery pack. This service plug is provided so as to protrude from the floor of the vehicle compartment so that it can be operated from the vehicle compartment side, and a metal cover is provided to cover this. The metal cover that covers this service plug can also be made lighter by replacing it with a shield with a conductive cloth arranged on the surface of resin.

１０ 電池スタック、１２ 電池セル、１４ セル間バスバ、１６ 端子、１８ エンドプレート、２０ 結束バンド、２０ａ 端板、２０ｂ バンド本体、３０ 遮蔽体、３２ 樹脂基板、３４ 導電布。
 REFERENCE SIGNS LIST 10 battery stack, 12 battery cell, 14 inter-cell bus bar, 16 terminal, 18 end plate, 20 cable tie, 20a end plate, 20b band body, 30 shield, 32 resin substrate, 34 conductive cloth.

Claims (4)

複数の電池セルから構成される電池スタックと、
前記電池スタックの上面において前記複数の電池セル間を接続するセル間バスバと、
前記電池スタックの少なくとも上側に配設される導電布と、
を備え、
少なくとも、前記セル間バスバの上側に重なり前記電池スタックの上側に配設される前記導電布の厚みを、前記電池スタックの上面の他の部分に配設される前記導電布の厚みと比較して厚く設定する、
電磁波遮蔽構造。 A battery stack including a plurality of battery cells;
an inter-cell bus bar that connects the plurality of battery cells on a top surface of the battery stack;
A conductive cloth disposed on at least an upper side of the battery stack;
Equipped with
At least a thickness of the conductive cloth that overlaps an upper side of the inter-cell bus bar and is disposed on the upper side of the battery stack is set to be thicker than a thickness of the conductive cloth that is disposed in another portion of the upper surface of the battery stack.
Electromagnetic wave shielding structure. 複数の電池セルから構成される電池スタックと、
前記電池スタックの上面において前記複数の電池セル間を接続するセル間バスバと、
前記電池スタックの少なくとも上側に配設される導電布と、
電磁波を遮蔽できる金属製であって前記複数の電池セルを結束する結束バンドと、
を備え、
少なくとも、前記結束バンドと重なり前記電池スタックの上側に配設される前記導電布の厚みを、前記電池スタックの上面の他の部分に配設される前記導電布の厚みと比べて薄く設定する、
電磁波遮蔽構造。 A battery stack including a plurality of battery cells;
an inter-cell bus bar that connects the plurality of battery cells on a top surface of the battery stack;
A conductive cloth disposed on at least an upper side of the battery stack;
a binding band made of a metal capable of blocking electromagnetic waves and binding the plurality of battery cells ;
Equipped with
At least a thickness of the conductive cloth that overlaps with the cable tie and is disposed on the upper side of the battery stack is set to be thinner than a thickness of the conductive cloth that is disposed on other parts of the upper surface of the battery stack.
Electromagnetic wave shielding structure. 請求項１または２に記載の電磁波遮蔽構造であって、
前記導電布の厚みは、前記導電布の重ね合わせる枚数を変化させることで変更される、
電磁波遮蔽構造。 3. The electromagnetic wave shielding structure according to claim 1,
The thickness of the conductive cloth is changed by changing the number of layers of the conductive cloth.
Electromagnetic wave shielding structure. 請求項１～３のいずれか１つに記載の電磁波遮蔽構造であって、
前記電池スタックの上面を覆う樹脂基板を有し、
前記導電布は、前記樹脂基板の上面に配置される、
電磁波遮蔽構造。 The electromagnetic wave shielding structure according to any one of claims 1 to 3,
a resin substrate covering an upper surface of the battery stack;
The conductive cloth is disposed on the upper surface of the resin substrate.
Electromagnetic wave shielding structure.
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