WO2025204994A1 - Battery cell - Google Patents
Battery cellInfo
- Publication number
- WO2025204994A1 WO2025204994A1 PCT/JP2025/009625 JP2025009625W WO2025204994A1 WO 2025204994 A1 WO2025204994 A1 WO 2025204994A1 JP 2025009625 W JP2025009625 W JP 2025009625W WO 2025204994 A1 WO2025204994 A1 WO 2025204994A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat transfer
- transfer sheet
- battery cell
- laminate
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- This disclosure relates to a battery cell.
- Patent Document 1 discloses a battery cell comprising an electrode assembly (laminated body) in which positive and negative electrodes are stacked, and a container that houses the laminate.
- a gap-filling sheet is inserted between the laminate and the side wall of the container, along the side wall.
- the gap-filling sheets are sheet-like members made of insulating resin, and are inserted on both sides of the laminate to seal gaps within the battery cell container.
- a gap-filling sheet with irregularities is disposed on one side of the laminate, and a gap-filling sheet without irregularities is disposed on the other side.
- the side of the irregular gap-filling sheet facing the laminate is flat, while the side facing the container side wall has an irregular structure consisting of thick convex portions formed in a straight line corresponding to the thick portions of the sheet and thin concave portions formed in a straight line corresponding to the thin portions of the sheet.
- Multiple battery cells make up a single battery module.
- the multiple battery cells that make up the battery module are installed along the stacking direction of the stack, and are constrained with a load applied in the stacking direction of the stack. As a result, heat builds up between the outer surfaces of at least one of the stacks, and it is sometimes necessary to limit the output of the battery cells.
- At least one embodiment of the present invention aims to provide a battery cell that can efficiently dissipate heat between the opposing outer surfaces of at least one laminate.
- a battery cell is a battery cell comprising at least one laminate and a container accommodating the at least one laminate, wherein the at least one laminate includes a positive electrode sheet, a negative electrode sheet, a separator sandwiched between the positive electrode sheet and the negative electrode sheet, and an electrolyte provided between the positive electrode sheet and the separator, and between the negative electrode sheet and the separator; and further comprising a first heat transfer sheet provided between the opposing outer surfaces of the at least one laminate, and a second heat transfer sheet provided along the inner wall surface of the container and connected to the first heat transfer sheet.
- the at least one laminate is at least two wound bodies formed by winding one laminate, and the first heat transfer sheet is provided between the outer surfaces of two adjacent wound bodies of the at least two wound bodies.
- the first heat transfer sheet and the second heat transfer sheet are graphite sheets.
- the configuration (5) above has high thermal conductivity, allowing heat between the opposing outer surfaces of at least one laminate to be efficiently released to the outside of the container.
- the configuration (6) above has high thermal conductivity, allowing heat between the opposing outer surfaces of at least one laminate to be efficiently released to the outside of the container.
- the configuration (7) above has high thermal conductivity, allowing heat between the opposing outer surfaces of at least one laminate to be efficiently released to the outside of the container.
- heat between the opposing outer surfaces of at least one laminate can be efficiently dissipated to the outside of the container.
- FIG. 1 is a diagram schematically illustrating a battery module 100 in which a plurality of battery cells 1 are connected.
- each of the plurality of battery cells 1 is a secondary battery that functions as a battery by itself, and is connected in series or parallel to form a single battery module 100.
- the plurality of battery cells 1 that constitute one battery module 100 are installed between a pair of side plates 101, 102 and are restrained in a state in which a load is applied by a connecting plate 103 that interconnects the pair of side plates 101, 102.
- a passage 104 through which a refrigerant such as cooling water flows is provided below the plurality of battery cells 1 that constitute the battery module 100, and the plurality of battery cells 1 are heated or cooled.
- the battery cell 1 includes at least one laminate 2 and a container 3 that houses the at least one laminate 2.
- the at least one laminate 2 is formed by stacking a positive electrode sheet 2a, a separator 2c, a negative electrode sheet 2b, and a separator 2c in this order, and rolling up the laminate 2.
- the separator 2c is porous and contains an electrolyte within its pores.
- the container 3 is made of metal and has the shape of a rectangular parallelepiped box, with a positive terminal 4 and a negative terminal 5 provided on its top surface.
- At least one laminate 2 is made up of at least two wound bodies 21, 22 formed by winding one laminate.
- the at least two wound bodies 21, 22 are two wound bodies, but are not limited to this and may be three wound bodies or more wound bodies.
- the battery cell 1 of embodiment 1 includes a first heat transfer sheet 6 provided between the opposing outer surfaces of at least one laminate 2, and a second heat transfer sheet 7 provided along the inner wall surface of the container 3 and connected to the first heat transfer sheet 6.
- the first heat transfer sheet 6 and the second heat transfer sheet 7 are made of a material with high heat transfer performance.
- the first heat transfer sheet 6 and the second heat transfer sheet 7 are, for example, graphite sheets, carbon nanotube sheets, or graphene sheets. However, they may also be made of an electrically insulating material with a metal filler such as copper or aluminum, or a resin, rubber, or elastomer material with a graphite sheet, carbon nanotube sheet, or graphene sheet as a filler.
- the first heat transfer sheet 6 is provided between the outer surfaces of two adjacent windings 21, 22 of the at least two windings.
- the at least two windings are two windings 21, 22, and the first heat transfer sheet 6 is provided between the outer surfaces of the two windings 21, 22, but this is not limited to this.
- the at least two windings are three windings, the first heat transfer sheet 6 is provided between the outer surfaces of the two adjacent windings.
- heat between the outer surfaces of at least two adjacent windings 21, 22 travels from the first heat transfer sheet 6 (61, 62) to the second heat transfer sheet 7 (71, 72) and is released from the bottom wall surface 31 of the container 3 to the outside of the container 3.
- heat between the outer surfaces of two adjacent windings 21, 22 of the at least two windings travels from the first heat transfer sheet 6 through the second heat transfer sheet 7D and is released to the outside of the container 3 through the side wall surface 32 of the container 3.
- Fig. 7 is a side cross-sectional view schematically illustrating the configuration of a battery cell 1E according to embodiment 5.
- the battery cell 1E according to embodiment 5 is the same as the battery cell 1 according to embodiment 1, except for at least one laminate 2 and a first heat transfer sheet 6E.
- the at least one laminate 2 is at least two laminates 24, 25.
- the at least two laminates 24, 25 are laminates in which two or more laminates are stacked, and any number of laminates may be stacked.
- the first heat transfer sheet 6E is provided between the outer surfaces of two adjacent laminates 24, 25 of the at least two laminates.
- heat between the outer surfaces of two adjacent laminates 24, 25 of the at least two laminates 24, 25 travels from the first heat transfer sheet 6 through the second heat transfer sheet 7F and is released from the side wall surface 32 of the container 3 to the outside of the container 3.
- the present invention is not limited to the above-described embodiments, but includes modifications to the above-described embodiments and appropriate combinations of these embodiments.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
本開示は、バッテリセルに関する。 This disclosure relates to a battery cell.
特許文献１には、正極及び負極が積層された電極体（積層体）と、積層体を収容する容器とを備えた単電池（バッテリセル）が開示されている。かかるバッテリセルでは、積層体と容器側壁との間に、該容器側壁に沿って間隙充填シートが挿入されている。間隙充填シートは、絶縁性樹脂からなるシート状の部材であり、バッテリセルの容器内の隙間を塞ぐように積層体の両側方に挿入されている。積層体の一方側には凹凸のある間隙充填シートが配置され、他方側には凹凸のない間隙充填シートが配置される。凹凸のある間隙充填シートの積層体に対向する面側はフラット（平坦）に形成され、容器側壁に対向する面側はシート肉厚部に相当する直線状に形成された厚肉凸部とシート肉薄部に相当する直線状に形成された薄肉凹部とからなる凹凸構造が形成されている。このように凹凸のある間隙充填シートの一部に厚みの薄い薄肉凹部を設けることにより、薄肉凹部と該容器側壁との間に空隙（間隙充填シートの空隙）を形成することができる。これにより、間隙充填シートの放熱効率は高まり、容器内で発生した熱を間隙充填シートの空隙へと速やかに放散することができる。 Patent Document 1 discloses a battery cell comprising an electrode assembly (laminated body) in which positive and negative electrodes are stacked, and a container that houses the laminate. In this battery cell, a gap-filling sheet is inserted between the laminate and the side wall of the container, along the side wall. The gap-filling sheets are sheet-like members made of insulating resin, and are inserted on both sides of the laminate to seal gaps within the battery cell container. A gap-filling sheet with irregularities is disposed on one side of the laminate, and a gap-filling sheet without irregularities is disposed on the other side. The side of the irregular gap-filling sheet facing the laminate is flat, while the side facing the container side wall has an irregular structure consisting of thick convex portions formed in a straight line corresponding to the thick portions of the sheet and thin concave portions formed in a straight line corresponding to the thin portions of the sheet. By providing thin concave portions in parts of the irregular gap-filling sheet, a gap (gap in the gap-filling sheet) can be formed between the thin concave portions and the container side wall. This increases the heat dissipation efficiency of the gap filling sheet, allowing heat generated inside the container to be quickly dissipated into the gaps in the gap filling sheet.
バッテリセルは複数で一つのバッテリモジュールを構成する。バッテリモジュールを構成する複数のバッテリセルは、積層体の積層方向に沿って設置され、積層体の積層方向に荷重が加えられた状態で拘束される。そのため、少なくとも一つの積層体の外表面間に熱がこもるので、バッテリセルの出力を制限しなければならない場合があった。 Multiple battery cells make up a single battery module. The multiple battery cells that make up the battery module are installed along the stacking direction of the stack, and are constrained with a load applied in the stacking direction of the stack. As a result, heat builds up between the outer surfaces of at least one of the stacks, and it is sometimes necessary to limit the output of the battery cells.
上述の事情に鑑みて、本発明の少なくとも一実施形態は、少なくとも一つの積層体の向かい合う外表面間の熱を効率的に放出することができるバッテリセルを提供することを課題とする。 In light of the above, at least one embodiment of the present invention aims to provide a battery cell that can efficiently dissipate heat between the opposing outer surfaces of at least one laminate.
（１）本発明の少なくとも一実施形態に係るバッテリセルは、少なくとも一つの積層体と、前記少なくとも一つの積層体が収容された容器と、を備えたバッテリセルであって、前記少なくとも一つの積層体は、正極シートと、負極シートと、前記正極シートと前記負極シートとの間に挟まれたセパレータと、前記正極シートと前記セパレータとの間、及び前記負極シートと前記セパレータとの間に設けられた電解質と、を含み、前記少なくとも一つの積層体の向かい合う外表面間に設けられた第１伝熱シートと、前記容器の内壁面に沿って設けられ、前記第１伝熱シートと接続された第２伝熱シートと、を備える。 (1) A battery cell according to at least one embodiment of the present invention is a battery cell comprising at least one laminate and a container accommodating the at least one laminate, wherein the at least one laminate includes a positive electrode sheet, a negative electrode sheet, a separator sandwiched between the positive electrode sheet and the negative electrode sheet, and an electrolyte provided between the positive electrode sheet and the separator, and between the negative electrode sheet and the separator; and further comprising a first heat transfer sheet provided between the opposing outer surfaces of the at least one laminate, and a second heat transfer sheet provided along the inner wall surface of the container and connected to the first heat transfer sheet.
上記（１）の構成によれば、少なくとも一つの積層体の向かい合う外表面間の熱は、第１伝熱シートから第２伝熱シートを伝って、容器の内壁面から容器の外部に放出される。これにより、少なくとも一つの積層体の向かい合う外表面間の熱を容器の外部に効率的に放出することができる。 According to the above configuration (1), heat between the opposing outer surfaces of at least one laminate is transferred from the first heat transfer sheet to the second heat transfer sheet and released from the inner wall surface of the container to the outside of the container. This allows the heat between the opposing outer surfaces of at least one laminate to be efficiently released to the outside of the container.
（２）幾つかの実施形態では、上記（１）の構成において、前記少なくとも一つの積層体は、一つの積層体が捲回されて構成された少なくとも二つの捲回体であり、前記第１伝熱シートは、前記少なくとも二つの捲回体のうち、隣接する二つの捲回体の外表面間に設けられる。 (2) In some embodiments, in the configuration of (1) above, the at least one laminate is at least two wound bodies formed by winding one laminate, and the first heat transfer sheet is provided between the outer surfaces of two adjacent wound bodies of the at least two wound bodies.
上記（２）の構成によれば、少なくとも二つの捲回体のうち、隣接する二つの捲回体の外表面間の熱は、第１伝熱シートから第２伝熱シートを伝って、容器の内壁面から容器の外部に放出される。これにより、少なくとも二つの捲回体のうち、隣接する二つの捲回体の外表面間の熱を容器の外部に効率的に放出することができる。 According to the configuration (2) above, heat between the outer surfaces of two adjacent windings of the at least two windings travels from the first heat transfer sheet to the second heat transfer sheet and is released from the inner wall surface of the container to the outside of the container. This allows heat between the outer surfaces of two adjacent windings of the at least two windings to be efficiently released to the outside of the container.
（３）幾つかの実施形態では、上記（１）の構成において、前記少なくとも一つの積層体は、一つの積層体が捲回されて構成された一つの捲回体であり、前記第１伝熱シートは、前記一つの捲回体の異なる二箇所の外表面間に設けられる。 (3) In some embodiments, in the configuration of (1) above, the at least one laminate is a single wound body formed by winding a single laminate, and the first heat transfer sheet is provided between two different outer surfaces of the single wound body.
上記（３）の構成によれば、一つの捲回体の異なる二箇所の外表面間の熱は、第１伝熱シートから第２伝熱シートを伝って、容器の内壁面から容器の外部に放出される。これにより、一つの捲回体の異なる二箇所の外表面間の熱を容器の外部に効率的に放出することができる。 According to the configuration (3) above, heat between two different outer surfaces of one wound body is transferred from the first heat transfer sheet to the second heat transfer sheet and released from the inner wall surface of the container to the outside of the container. This allows heat between two different outer surfaces of one wound body to be efficiently released to the outside of the container.
（４）幾つかの実施形態では、上記（１）の構成において、前記少なくとも一つの積層体は、少なくとも二つの積層体であり、前記第１伝熱シートは、前記少なくとも二つの積層体のうち、隣接する二つの積層体の外表面間に設けられる。 (4) In some embodiments, in the configuration of (1) above, the at least one laminate is at least two laminates, and the first heat transfer sheet is provided between the outer surfaces of two adjacent laminates of the at least two laminates.
上記（４）の構成によれば、少なくとも二つの積層体のうち、隣接する二つの積層体の外表面間の熱は、第１伝熱シートから第２伝熱シートを伝って、容器の内壁面から容器の外部に放出される。これにより、少なくとも二つの積層体のうち、隣接する二つの積層体の外表面間の熱を容器の外部に効率的に放出することができる。 According to the configuration (4) above, heat between the outer surfaces of two adjacent laminates of the at least two laminates is transferred from the first heat transfer sheet to the second heat transfer sheet and released from the inner wall surface of the container to the outside of the container. This allows the heat between the outer surfaces of two adjacent laminates of the at least two laminates to be efficiently released to the outside of the container.
（５）幾つかの実施形態では、上記（１）から（４）のいずれか一つの構成において、前記第１伝熱シート及び前記第２伝熱シートは、グラファイトシートである。 (5) In some embodiments, in any one of the configurations (1) to (4) above, the first heat transfer sheet and the second heat transfer sheet are graphite sheets.
上記（５）の構成によれば、高い熱伝導性能を有するので、少なくとも一つの積層体の向かい合う外表面間の熱を容器の外部に効率的に放出することができる。 The configuration (5) above has high thermal conductivity, allowing heat between the opposing outer surfaces of at least one laminate to be efficiently released to the outside of the container.
（６）幾つかの実施形態では、上記（１）から（４）のいずれか一つの構成において、前記第１伝熱シート及び前記第２伝熱シートは、カーボンナノチューブシートである。 (6) In some embodiments, in any one of the configurations (1) to (4) above, the first heat transfer sheet and the second heat transfer sheet are carbon nanotube sheets.
上記（６）の構成によれば、高い熱伝導性能を有するので、少なくとも一つの積層体の向かい合う外表面間の熱を容器の外部に効率的に放出することができる。 The configuration (6) above has high thermal conductivity, allowing heat between the opposing outer surfaces of at least one laminate to be efficiently released to the outside of the container.
（７）幾つかの実施形態では、上記（１）から（４）のいずれか一つの構成において、前記第１伝熱シート及び前記第２伝熱シートは、グラフェンシートである。 (7) In some embodiments, in any one of the configurations (1) to (4) above, the first heat transfer sheet and the second heat transfer sheet are graphene sheets.
上記（７）の構成によれば、高い熱伝導性能を有するので、少なくとも一つの積層体の向かい合う外表面間の熱を容器の外部に効率的に放出することができる。 The configuration (7) above has high thermal conductivity, allowing heat between the opposing outer surfaces of at least one laminate to be efficiently released to the outside of the container.
本発明の少なくとも一実施形態によれば、少なくとも一つの積層体の向かい合う外表面間の熱を容器の外部に効率的に放出することができる。 According to at least one embodiment of the present invention, heat between the opposing outer surfaces of at least one laminate can be efficiently dissipated to the outside of the container.
以下、添付図面を参照して本発明の幾つかの実施形態について説明する。ただし、実施形態として記載されている又は図面に示されている構成部品の寸法、材質、形状、その相対的配置等は、本発明の範囲をこれに限定する趣旨ではなく、単なる説明例にすぎない。 Several embodiments of the present invention will be described below with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention and are merely illustrative examples.
［バッテリモジュール］
図１は、複数のバッテリセル１が接続されたバッテリモジュール１００を概略的に示す図である。図１に示すように、複数のバッテリセル１はそれぞれ一つで電池として機能する二次電池であって、直列又は並列に接続されることで一つのバッテリモジュール１００が構成される。一つのバッテリモジュール１００を構成する複数のバッテリセル１は、一対の側板１０１，１０２間に設置され、一対の側板１０１，１０２を相互に連結する連結板１０３によって荷重が加えられた状態で拘束される。バッテリモジュール１００を構成する複数のバッテリセル１の下には、冷却水等の冷媒が流れる通路１０４が設けられ、複数のバッテリセル１は加熱又は冷却される。
[Battery module]
FIG. 1 is a diagram schematically illustrating a battery module 100 in which a plurality of battery cells 1 are connected. As shown in FIG. 1 , each of the plurality of battery cells 1 is a secondary battery that functions as a battery by itself, and is connected in series or parallel to form a single battery module 100. The plurality of battery cells 1 that constitute one battery module 100 are installed between a pair of side plates 101, 102 and are restrained in a state in which a load is applied by a connecting plate 103 that interconnects the pair of side plates 101, 102. A passage 104 through which a refrigerant such as cooling water flows is provided below the plurality of battery cells 1 that constitute the battery module 100, and the plurality of battery cells 1 are heated or cooled.
複数のバッテリモジュール１００が収容されたバッテリパックは、電気車両（ＥＶ）、ハイブリッド車両（ＨＶ，ＨＥＶ）、プラグインハイブリッド車両（ＰＨＶ，ＰＨＥＶ）、燃料電池車両（ＦＣＶ）等の電動車両に搭載され、停車中に急速充電器等の外部機器によって充電（外部充電）され、停車中に一般家屋等の外部機器に給電（外部給電）される。 A battery pack containing multiple battery modules 100 is mounted on electric vehicles such as electric vehicles (EVs), hybrid vehicles (HVs, HEVs), plug-in hybrid vehicles (PHVs, PHEVs), and fuel cell vehicles (FCVs), and is charged (external charging) by an external device such as a quick charger while the vehicle is parked, and supplies power (external power supply) to external devices such as an ordinary home while the vehicle is parked.
［実施形態１に係るバッテリセル］
図２は、実施形態１に係るバッテリセル１を概略的に示す側断面図である。図３は、図２に示した積層体２を概略的に示す断面図である。
[Battery cell according to embodiment 1]
Fig. 2 is a side cross-sectional view that schematically shows the battery cell 1 according to embodiment 1. Fig. 3 is a cross-sectional view that schematically shows the stack 2 shown in Fig. 2 .
図２に示すように、実施形態１に係るバッテリセル１は、少なくとも一つの積層体２と、少なくとも一つの積層体２が収容される容器３と、を備えている。図３に示すように、少なくとも一つの積層体２は、正極シート２ａ、セパレータ２ｃ、負極シート２ｂ、セパレータ２ｃの順に設けられ、その積層体２が捲かれることで積層される。なお、セパレータ２ｃは、多孔質であり、その多孔質中に電解質を含む。図２に示すように、容器３は、金属製であって、直方体の箱状であり、その上面にプラス端子４とマイナス端子５が設けられている。 As shown in FIG. 2, the battery cell 1 according to embodiment 1 includes at least one laminate 2 and a container 3 that houses the at least one laminate 2. As shown in FIG. 3, the at least one laminate 2 is formed by stacking a positive electrode sheet 2a, a separator 2c, a negative electrode sheet 2b, and a separator 2c in this order, and rolling up the laminate 2. The separator 2c is porous and contains an electrolyte within its pores. As shown in FIG. 2, the container 3 is made of metal and has the shape of a rectangular parallelepiped box, with a positive terminal 4 and a negative terminal 5 provided on its top surface.
実施形態１に係るバッテリセル１では、少なくとも一つの積層体２は、一つの積層体が捲回されて構成された少なくとも二つの捲回体２１，２２である。少なくとも二つの捲回体２１，２２は、二つの捲回体であるが、これに限られるものではなく、三つの捲回体、又はそれ以上の捲回体であってもよい。 In the battery cell 1 according to embodiment 1, at least one laminate 2 is made up of at least two wound bodies 21, 22 formed by winding one laminate. The at least two wound bodies 21, 22 are two wound bodies, but are not limited to this and may be three wound bodies or more wound bodies.
実施形態１に係るバッテリセル１は、少なくとも一つの積層体２の向かい合う外表面間に設けられた第１伝熱シート６と、容器３の内壁面に沿って設けられ、第１伝熱シート６と接続された第２伝熱シート７と、を備えている。 The battery cell 1 of embodiment 1 includes a first heat transfer sheet 6 provided between the opposing outer surfaces of at least one laminate 2, and a second heat transfer sheet 7 provided along the inner wall surface of the container 3 and connected to the first heat transfer sheet 6.
第１伝熱シート６及び第２伝熱シート７は、高い伝熱性能を有する材料で構成される。第１伝熱シート６及び第２伝熱シート７は、例えば、グラファイトシート、カーボンナノチューブシート、又はグラフェンシートであるが、銅やアルミニウム等の金属をフィラーとした電気絶縁材料で構成してもよいし、グラファイトシート、カーボンナノチューブシート、又はグラフェンシートをフィラーとした樹脂、ゴム又はエラストマー材料で構成してもよい。 The first heat transfer sheet 6 and the second heat transfer sheet 7 are made of a material with high heat transfer performance. The first heat transfer sheet 6 and the second heat transfer sheet 7 are, for example, graphite sheets, carbon nanotube sheets, or graphene sheets. However, they may also be made of an electrically insulating material with a metal filler such as copper or aluminum, or a resin, rubber, or elastomer material with a graphite sheet, carbon nanotube sheet, or graphene sheet as a filler.
実施形態１に係るバッテリセル１では、第１伝熱シート６は、少なくとも二つの捲回体のうち、隣接する二つの捲回体２１，２２の外表面間に設けられる。少なくとも二つの捲回体は二つの捲回体２１，２２であり、第１伝熱シート６は二つの捲回体２１，２２の外表面間に設けられるが、これに限られるものではなく、少なくとも二つの捲回体が三つの捲回体の場合に、第１伝熱シート６は、隣接する二つの捲解体の外表面間に設けられる。 In the battery cell 1 of embodiment 1, the first heat transfer sheet 6 is provided between the outer surfaces of two adjacent windings 21, 22 of the at least two windings. The at least two windings are two windings 21, 22, and the first heat transfer sheet 6 is provided between the outer surfaces of the two windings 21, 22, but this is not limited to this. When the at least two windings are three windings, the first heat transfer sheet 6 is provided between the outer surfaces of the two adjacent windings.
実施形態１に係るバッテリセル１では、第１伝熱シート６及び第２伝熱シート７は、それぞれ二枚の伝熱シート６１，６２，７１，７２で構成されている。二枚の第１伝熱シート６１，６２は重ね合わされて設けられ、二枚の第２伝熱シート７１，７２は容器３の底壁面３１に沿って互いに反対方向に延びるように設けられている。 In the battery cell 1 according to embodiment 1, the first heat transfer sheet 6 and the second heat transfer sheet 7 are each composed of two heat transfer sheets 61, 62, 71, 72. The two first heat transfer sheets 61, 62 are arranged in a stacked manner, and the two second heat transfer sheets 71, 72 are arranged to extend in opposite directions along the bottom wall surface 31 of the container 3.
実施形態１に係るバッテリセル１では、少なくなくとも二つの捲回体のうち、隣接する二つの捲回体２１，２２の外表面間の熱は、第１伝熱シート６（６１，６２）から第２伝熱シート７（７１，７２）を伝って、容器３の底壁面３１から容器３の外部に放出される。 In the battery cell 1 according to embodiment 1, heat between the outer surfaces of at least two adjacent windings 21, 22 travels from the first heat transfer sheet 6 (61, 62) to the second heat transfer sheet 7 (71, 72) and is released from the bottom wall surface 31 of the container 3 to the outside of the container 3.
実施形態１に係るバッテリセル１によれば、少なくとも二つの捲回体のうち、隣接する二つの捲回体２１，２２の外表面間の熱を容器３の外部に効率的に放出することができる。 The battery cell 1 according to embodiment 1 can efficiently dissipate heat between the outer surfaces of the two adjacent windings 21, 22 of the at least two windings to the outside of the container 3.
［実施形態２］
図４は、実施形態２に係るバッテリセル１Ｂを概略的に示す側断面図である。図４に示すように、実施形態２に係るバッテリセル１Ｂは、第１伝熱シート６Ｂ及び第２伝熱シート７Ｂを除いて実施形態１に係るバッテリセル１Ｂと同じである。
[Embodiment 2]
Fig. 4 is a side cross-sectional view schematically showing a battery cell 1B according to embodiment 2. As shown in Fig. 4, the battery cell 1B according to embodiment 2 is the same as the battery cell 1B according to embodiment 1 except for the first heat transfer sheet 6B and the second heat transfer sheet 7B.
実施形態２に係るバッテリセル１Ｂでは、第１伝熱シート６Ｂ及び第２伝熱シート７Ｂは、一枚の伝熱シートで構成され、第１伝熱シート６Ｂと第２伝熱シート７Ｂとの間には第３伝熱シート８が設けられている。 In the battery cell 1B according to embodiment 2, the first heat transfer sheet 6B and the second heat transfer sheet 7B are each composed of a single heat transfer sheet, and a third heat transfer sheet 8 is provided between the first heat transfer sheet 6B and the second heat transfer sheet 7B.
実施形態２に係るバッテリセル１Ｂでは、少なくとも二つの捲回体のうち、隣接する二つの捲回体２１，２２の外表面間の熱は、第１伝熱シート６Ｂから第３伝熱シート８、第２伝熱シート７Ｂの順に伝って、容器３の底壁面３１から容器３の外部に放出される。 In the battery cell 1B of embodiment 2, heat between the outer surfaces of two adjacent windings 21, 22 of the at least two windings is transferred from the first heat transfer sheet 6B to the third heat transfer sheet 8 and the second heat transfer sheet 7B in that order, and is then released from the bottom wall surface 31 of the container 3 to the outside of the container 3.
実施形態２に係るバッテリセル１Ｂによれば、第１伝熱シート６Ｂ、第２伝熱シート７Ｂ、及び第３伝熱シート８を一枚の伝熱シートで構成することができる。 In the battery cell 1B of embodiment 2, the first heat transfer sheet 6B, the second heat transfer sheet 7B, and the third heat transfer sheet 8 can be formed from a single heat transfer sheet.
［実施形態３］
図５は、実施形態３に係るバッテリセル１Ｃを概略的に示す側断面図である。図５に示すように、実施形態３に係るバッテリセル１Ｃは、少なくとも一つの積層体２、第１伝熱シート６Ｃ及び第２伝熱シート７Ｃを除いて実施形態１に係るバッテリセル１と同じである。
[Embodiment 3]
Fig. 5 is a side cross-sectional view schematically illustrating a battery cell 1C according to embodiment 3. As shown in Fig. 5, the battery cell 1C according to embodiment 3 is the same as the battery cell 1 according to embodiment 1 except for at least one laminate 2, a first heat transfer sheet 6C, and a second heat transfer sheet 7C.
実施形態３に係るバッテリセル１Ｃでは、少なくとも一つの積層体２は、一つの積層体が捲回された一つの捲回体２３であり、第１伝熱シート６Ｃは、一つの捲回体２３の異なる二箇所の外表面間に設けられる。一つの捲回体２３の異なる二箇所の外表面間は、捲回体２３の中心において折り返された積層体の外表面間であるが、これに限られるものではない。また、実施形態３に係るバッテリセル１Ｃでは、第２伝熱シート７Ｃは、容器３の側壁面３２に沿って設けられる。 In the battery cell 1C of embodiment 3, at least one laminate 2 is a single wound body 23 formed by winding a single laminate, and the first heat transfer sheet 6C is provided between two different outer surfaces of the single wound body 23. The two different outer surfaces of the single wound body 23 are between the outer surfaces of a laminate folded back at the center of the wound body 23, but are not limited to this. Furthermore, in the battery cell 1C of embodiment 3, the second heat transfer sheet 7C is provided along the side wall surface 32 of the container 3.
実施形態３に係るバッテリセル１Ｃでは、一つの捲回体２３の異なる二箇所の外表面間の熱は、第１伝熱シート６Ｃから第３伝熱シート８、及び第２伝熱シート７Ｃを伝って、容器３の側壁面（図５において前面）３２から外部に放出される。 In the battery cell 1C according to embodiment 3, heat between two different outer surfaces of one wound body 23 travels from the first heat transfer sheet 6C through the third heat transfer sheet 8 and the second heat transfer sheet 7C, and is released to the outside from the side wall surface (front surface in Figure 5) 32 of the container 3.
実施形態３に係るバッテリセル１Ｃによれば、一つの捲回体２３の異なる二箇所の外表面間の熱を容器３の外部に効率的に放出することができる。 The battery cell 1C according to embodiment 3 can efficiently dissipate heat between two different outer surfaces of a single wound body 23 to the outside of the container 3.
［実施形態４］
図６は、実施形態４に係るバッテリセル１Ｄの構成を概略的に示す平断面図である。図６に示すように、実施形態４に係るバッテリセル１Ｄは、第２伝熱シート７Ｄを除いて実施形態１に係るバッテリセル１と同じである。
[Embodiment 4]
Fig. 6 is a plan cross-sectional view schematically showing the configuration of a battery cell 1D according to embodiment 4. As shown in Fig. 6, the battery cell 1D according to embodiment 4 is the same as the battery cell 1 according to embodiment 1 except for a second heat transfer sheet 7D.
実施形態４に係るバッテリセル１Ｄでは、第２伝熱シート７Ｄは容器３の側壁面３２に沿って延びるように設けられている。第２伝熱シート７Ｄは、それぞれ二枚の伝熱シート７１Ｄ，７２Ｄで構成され、二枚の第２伝熱シート７１Ｄ，７２Ｄは容器３の側壁面３２に沿って互いに反対方向に延びるように設けられている。 In the battery cell 1D of embodiment 4, the second heat transfer sheet 7D is arranged to extend along the side wall surface 32 of the container 3. The second heat transfer sheet 7D is composed of two heat transfer sheets 71D, 72D, which are arranged to extend in opposite directions along the side wall surface 32 of the container 3.
実施形態４に係るバッテリセル１Ｄでは、少なくとも二つ捲回体のうち、隣接する二つの捲回体２１，２２の外表面間の熱は、第１伝熱シート６から第２伝熱シート７Ｄを伝って、容器３の側壁面３２から容器３の外部に放出される。 In the battery cell 1D of embodiment 4, heat between the outer surfaces of two adjacent windings 21, 22 of the at least two windings travels from the first heat transfer sheet 6 through the second heat transfer sheet 7D and is released to the outside of the container 3 through the side wall surface 32 of the container 3.
実施形態４に係るバッテリセル１Ｄによれば、バッテリセル１Ｄの下に冷却水等の冷媒が流れる通路を設けることができない場合であって、バッテリセル１Ｄの側面に沿って冷却水等の冷媒が流れる通路を設けることができる場合に、少なくとも二つの捲回体のうち、隣接する二つの捲回体２１，２２の外表面間の熱を容器３の外部に効率的に放出することができる。 With the battery cell 1D of embodiment 4, even if it is not possible to provide a passage below the battery cell 1D through which a refrigerant such as cooling water flows, but it is possible to provide a passage along the side of the battery cell 1D through which a refrigerant such as cooling water flows, heat between the outer surfaces of the two adjacent windings 21, 22 of the at least two windings can be efficiently released to the outside of the container 3.
［実施形態５］
図７は、実施形態５に係るバッテリセル１Ｅの構成を概略的に示す側断面図である。図７に示すように、実施形態５に係るバッテリセル１Ｅは、少なくとも一つの積層体２及び第１伝熱シート６Ｅを除いて、実施形態１に係るバッテリセル１と同じである。
[Embodiment 5]
Fig. 7 is a side cross-sectional view schematically illustrating the configuration of a battery cell 1E according to embodiment 5. As shown in Fig. 7, the battery cell 1E according to embodiment 5 is the same as the battery cell 1 according to embodiment 1, except for at least one laminate 2 and a first heat transfer sheet 6E.
実施形態５に係るバッテリセル１Ｅでは、少なくとも一つの積層体２は、少なくとも二つの積層体２４，２５である。少なくとも二つの積層体２４，２５は、二つ以上の積層体が積層された積層体であり、任意の数の積層体が積層される。また、実施形態５に係るバッテリセル１Ｅでは、第１伝熱シート６Ｅは、少なくとも二つの積層体のうち、隣接する二つの積層体２４，２５の外表面間に設けられている。 In the battery cell 1E according to embodiment 5, the at least one laminate 2 is at least two laminates 24, 25. The at least two laminates 24, 25 are laminates in which two or more laminates are stacked, and any number of laminates may be stacked. Furthermore, in the battery cell 1E according to embodiment 5, the first heat transfer sheet 6E is provided between the outer surfaces of two adjacent laminates 24, 25 of the at least two laminates.
実施形態５に係るバッテリセル１Ｅでは、少なくとも二つの積層体２４，２５のうち、隣接する二つの積層体２４，２５の外表面間の熱は、第１伝熱シート６Ｅから第２伝熱シート７を伝って、容器３の底壁面３１から容器３の外部に放出される。 In the battery cell 1E of embodiment 5, heat between the outer surfaces of two adjacent laminates 24, 25 of the at least two laminates 24, 25 travels from the first heat transfer sheet 6E to the second heat transfer sheet 7 and is released from the bottom wall surface 31 of the container 3 to the outside of the container 3.
実施形態５に係るバッテリセル１Ｅによれば、少なくとも二つの積層体のうち、隣接する二つの積層体２４，２５の外表面間の熱を容器３の外部に効率的に放出することができる。 The battery cell 1E of embodiment 5 allows the heat between the outer surfaces of the two adjacent laminates 24, 25 of the at least two laminates to be efficiently released to the outside of the container 3.
［実施形態６］
図８は、実施形態６に係るバッテリセル１Ｆを概略的に示す平断面図である。図８に示すように、実施形態６に係るバッテリセル１Ｆは、第２伝熱シート７Ｆを除いて実施形態５に係るバッテリセル１Ｅと同じである。
[Embodiment 6]
Fig. 8 is a plan cross-sectional view schematically showing a battery cell 1F according to embodiment 6. As shown in Fig. 8, the battery cell 1F according to embodiment 6 is the same as the battery cell 1E according to embodiment 5 except for a second heat transfer sheet 7F.
実施形態６に係るバッテリセル１Ｆでは、第２伝熱シート７Ｆは容器３の側壁面３２に沿って延びるように設けられている。第２伝熱シート７Ｆは、それぞれ二枚の伝熱シート７１Ｆ，７１Ｆで構成され、二枚の伝熱シート７１Ｆ，７２Ｆは容器３の側壁面３２に沿って互いに反対方向に延びるように設けられている。 In the battery cell 1F according to embodiment 6, the second heat transfer sheet 7F is arranged to extend along the side wall surface 32 of the container 3. The second heat transfer sheet 7F is composed of two heat transfer sheets 71F, 71F, and the two heat transfer sheets 71F, 72F are arranged to extend in opposite directions along the side wall surface 32 of the container 3.
実施形態６に係るバッテリセル１Ｆでは、少なくとも二つの積層体２４，２５のうち、隣接する二つの積層体２４，２５の外表面間の熱は、第１伝熱シート６から第２伝熱シート７Ｆを伝って、容器３の側壁面３２から容器３の外部に放出される。 In the battery cell 1F of embodiment 6, heat between the outer surfaces of two adjacent laminates 24, 25 of the at least two laminates 24, 25 travels from the first heat transfer sheet 6 through the second heat transfer sheet 7F and is released from the side wall surface 32 of the container 3 to the outside of the container 3.
実施形態６に係るバッテリセル１Ｆによれば、バッテリセル１Ｆの下に冷却水等の冷媒が流れる通路を設けることができない場合であって、バッテリセル１Ｆの側面に沿って冷却水等の冷媒が流れる通路を設けることができる場合に、少なくとも二つの積層体２４，２５のうち、隣接する二つの積層体２４，２５の外表面間の熱を容器３の外部に効率的に放出することができる。 With the battery cell 1F of embodiment 6, even if it is not possible to provide a passage below the battery cell 1F through which a refrigerant such as cooling water flows, but it is possible to provide a passage along the side of the battery cell 1F through which a refrigerant such as cooling water flows, heat between the outer surfaces of two adjacent stacks 24, 25 out of at least two stacks 24, 25 can be efficiently released to the outside of the container 3.
本発明は、上述した実施形態に限定されることはなく、上述した実施形態に変形を加えた形態や、これらの形態を適宜組み合わせた形態を含む。 The present invention is not limited to the above-described embodiments, but includes modifications to the above-described embodiments and appropriate combinations of these embodiments.
１，１Ｂ～１Ｆ バッテリセル
２， 積層体
２ａ 正極シート
２ｂ 負極シート
２ｃ セパレータ
２１，２２，２３ 捲回体
２４，２５ 積層体
３ 容器
３１ 底壁面
３２ 側壁面
４ プラス端子
５ マイナス端子
６，６Ｂ，６Ｃ，６Ｅ，６１，６２ 第１伝熱シート
７，７Ｃ～７Ｆ，７１，７１Ｄ，７１Ｆ，７２，７２Ｄ，７２Ｆ 第２伝熱シート
８ 第３伝熱シート
１００ バッテリモジュール
１０１，１０２ 側板
１０３ 連結板
１０４ 冷媒が流れる通路
1, 1B to 1F Battery cell 2, Laminate 2a Positive electrode sheet 2b Negative electrode sheet 2c Separators 21, 22, 23 Wound body 24, 25 Laminate 3 Container 31 Bottom wall surface 32 Side wall surface 4 Positive terminal 5 Negative terminal 6, 6B, 6C, 6E, 61, 62 First heat transfer sheet 7, 7C to 7F, 71, 71D, 71F, 72, 72D, 72F Second heat transfer sheet 8 Third heat transfer sheet 100 Battery modules 101, 102 Side plate 103 Connecting plate 104 Passage through which refrigerant flows
Claims (7)
前記少なくとも一つの積層体が収容された容器と、
を備えたバッテリセルであって、
前記少なくとも一つの積層体は、正極シートと、負極シートと、前記正極シートと前記負極シートとの間に挟まれたセパレータと、前記正極シートと前記セパレータとの間、及び前記負極シートと前記セパレータとの間に設けられた電解質と、を含み、
前記少なくとも一つの積層体の向かい合う外表面間に設けられた第１伝熱シートと、
前記容器の内壁面に沿って設けられ、前記第１伝熱シートと接続された第２伝熱シートと、
を備えたバッテリセル。 At least one laminate;
a container containing the at least one laminate;
A battery cell comprising:
the at least one laminate includes a positive electrode sheet, a negative electrode sheet, a separator sandwiched between the positive electrode sheet and the negative electrode sheet, and an electrolyte provided between the positive electrode sheet and the separator, and between the negative electrode sheet and the separator,
a first heat transfer sheet disposed between opposing outer surfaces of the at least one laminate;
a second heat transfer sheet provided along an inner wall surface of the container and connected to the first heat transfer sheet;
a battery cell comprising:
前記第１伝熱シートは、前記少なくとも二つの捲回体のうち、隣接する二つの捲回体の外表面間に設けられた請求項１に記載のバッテリセル。 the at least one laminate is at least two wound bodies formed by winding one laminate,
The battery cell according to claim 1 , wherein the first heat transfer sheet is provided between outer surfaces of two adjacent windings among the at least two windings.
前記第１伝熱シートは、前記一つの捲回体の異なる二箇所の外表面間に設けられた請求項１に記載のバッテリセル。 the at least one laminate is a single wound body formed by winding one laminate,
The battery cell according to claim 1 , wherein the first heat transfer sheet is provided between two different outer surfaces of the one wound body.
前記第１伝熱シートは、前記少なくとも二つの積層体のうち、隣接する二つの積層体の外表面間に設けられた請求項１に記載のバッテリセル。 the at least one laminate is at least two laminates;
The battery cell according to claim 1 , wherein the first heat transfer sheet is provided between outer surfaces of two adjacent laminates among the at least two laminates.
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| JP2024-055114 | 2024-03-28 | ||
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013247024A (en) * | 2012-05-28 | 2013-12-09 | Sharp Corp | Power supply device |
| WO2021033706A1 (en) * | 2019-08-19 | 2021-02-25 | Ａｐｂ株式会社 | Lithium ion battery module and battery pack |
| JP2022148731A (en) * | 2021-03-24 | 2022-10-06 | 株式会社Ｇｓユアサ | Storage element and storage device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013247024A (en) * | 2012-05-28 | 2013-12-09 | Sharp Corp | Power supply device |
| WO2021033706A1 (en) * | 2019-08-19 | 2021-02-25 | Ａｐｂ株式会社 | Lithium ion battery module and battery pack |
| JP2022148731A (en) * | 2021-03-24 | 2022-10-06 | 株式会社Ｇｓユアサ | Storage element and storage device |
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