WO2020252848A1 - Bloc-batterie d'alimentation et véhicule - Google Patents

Bloc-batterie d'alimentation et véhicule Download PDF

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Publication number
WO2020252848A1
WO2020252848A1 PCT/CN2019/097480 CN2019097480W WO2020252848A1 WO 2020252848 A1 WO2020252848 A1 WO 2020252848A1 CN 2019097480 W CN2019097480 W CN 2019097480W WO 2020252848 A1 WO2020252848 A1 WO 2020252848A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
heat exchange
battery pack
power battery
battery
Prior art date
Application number
PCT/CN2019/097480
Other languages
English (en)
Chinese (zh)
Inventor
王隆兴
王小龙
郑卫鑫
朱燕
Original Assignee
比亚迪股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Publication of WO2020252848A1 publication Critical patent/WO2020252848A1/fr

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Classifications

    • 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
    • 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
    • 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
    • H01M10/6554—Rods or plates
    • 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
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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

Definitions

  • This application belongs to the technical field of power battery manufacturing, and specifically relates to a power battery pack and a vehicle having the power battery pack.
  • the temperature distribution of the power battery pack has a great influence on its life and endurance.
  • the liquid-cooled heat exchange effect is good, and the heat management system of the power battery pack widely uses the liquid-cooled type.
  • the liquid-cooled thermal management system in the related technology usually installs a liquid-cooled plate in the battery pack shell, or directly empties the base material to form a liquid-cooled plate. Once the coolant leaks, it will harm the battery inside the battery pack and lose huge.
  • This application aims to solve at least one of the technical problems existing in the prior art.
  • the power battery pack includes a tray and an upper cover.
  • the tray includes a side frame and a bottom plate.
  • the upper cover and the bottom plate are respectively connected to the upper and lower ends of the side frame to define a battery.
  • the accommodating cavity; the single battery, the single battery is installed in the battery accommodating cavity; the bottom guard plate, the bottom guard plate is connected with the lower end of the side frame, and the bottom guard plate is connected to the bottom plate Spaced in the vertical direction; heat exchange plates, the heat exchange plates are sandwiched between the bottom guard plate and the bottom plate.
  • the heat exchange plate in the interlayer between the bottom plate and the bottom protection plate, the electrical safety of the power battery pack can be effectively ensured, and the bottom protection plate can protect the heat exchange plate to a certain extent.
  • the heat exchange plate does not occupy the space of the battery accommodating cavity, and the battery density of the entire power battery pack is higher.
  • the application also proposes a vehicle with the above-mentioned power battery pack.
  • Figure 1 is a top view of a power battery pack according to an embodiment of the present application (the upper cover and the single cells are not shown);
  • Figure 2 is a cross-sectional view at A-A in Figure 1;
  • Figure 3 is a partial enlarged view of B in Figure 2;
  • Figure 4 is an exploded view of a power battery pack according to an embodiment of the present application (the upper cover and the single battery are not shown);
  • FIG. 5 is a schematic diagram of the arrangement structure of the single cells in the power battery pack according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of the single cells in the power battery pack arranged on the tray according to an embodiment of the present application;
  • Fig. 7 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
  • the front-rear direction in this application is the longitudinal direction of the vehicle 1000, that is, the X direction; the left-right direction is the lateral direction of the vehicle 1000, that is, the Y direction; and the vertical direction is the vertical direction of the vehicle 1000, that is, the Z direction.
  • the power battery pack 100 according to an embodiment of the present application will be described below with reference to FIGS. 1 to 4.
  • the battery pack housing includes a tray 110, an upper cover (not shown in the figure), a single battery 120, a bottom protection plate 140, and a heat exchange plate 130.
  • the tray 110 includes a side frame 111 and a bottom plate 112.
  • the side frame 111 is a four-frame
  • the bottom plate 112 is fixedly connected to the bottom surface of the side frame 111.
  • the bottom plate and the side frame The bottom surface of the package is fixedly connected by welding to serve as the load-bearing structure of the entire package while ensuring the sealing performance of the package.
  • the bottom plate 112 also provides heat equalization performance to facilitate heat exchange between the package body and the outside through the heat exchange plate 130.
  • the upper cover and the bottom plate 112 are respectively connected with the upper and lower ends of the side frame 111 to define a battery accommodating cavity, and the single battery 120 is installed in the battery accommodating cavity.
  • the single battery 120 can be supported on the side frame of the tray 111, and the lower surface of the single battery 120 is spaced apart from the bottom plate of the tray 111, so that the rigidity and strength are far greater than the side frame of the bottom plate. , And a thermally conductive insulating layer may be sandwiched between the single battery 120 and the bottom plate.
  • the upper cover is connected to the upper end of the side frame 111, and the upper cover and the side frame 111 may be connected by at least one of a threaded connection member and glue.
  • glue is sandwiched between the upper end of the side frame 111 and the lower surface of the upper cover to realize the sealing and preliminary connection.
  • the threaded connection is arranged on the outer ring of the glue to fasten the tray 110 and the upper cover. .
  • the bottom guard plate 140 is connected to the lower end of the side frame 111, and the bottom guard plate 140 is spaced apart from the bottom plate 112, so that a cavity is formed between the bottom guard plate 140 and the bottom plate 112, and the heat exchange plate 130 is sandwiched between the bottom shield 140 and the bottom plate 112.
  • the heat exchange plate 130 has a heat exchange cavity, which is used for the circulation of heat exchange medium, and the heat exchange plate 130 may have a heat exchange cavity for circulation of the heat exchange medium.
  • the heat exchange plate 130 may be a hollow plate body, and the heat exchange plate 130 is provided with a flow channel for circulating a heat exchange medium, and the heat exchange medium may be water.
  • bottom guard plate 140 and the bottom plate 112 are equivalent to a sandwich structure on the bottom surface of the tray 110, so that the heat exchange plate 130 is placed outside of the battery containing cavity, which can effectively ensure the power battery pack 100 in the case of sudden coolant leakage. Electrical safety.
  • the power battery pack 100 is installed on the chassis of the vehicle 1000.
  • the heat exchange plate 130 is damaged.
  • the bottom guard plate 140 can protect the heat exchange plate 130 to a certain extent and prevent the heat exchange plate 130 from being damaged.
  • the side frame 111 may be provided with an isolation cavity 113, the end of the heat exchange plate 130 extends into the isolation cavity 113, the heat exchange plate 130 may include a plurality of heat exchange runners, and the heat exchange plate 130 A collecting pipe 131 is arranged at the end, and the collecting pipe 131 is arranged in the isolation cavity 113, and the collecting pipe 131 communicates with an external waterway through a joint 132 that penetrates the side frame 111.
  • the side frame 111 can be an aluminum profile, and the aluminum profile has a cavity structure, one of the cavity is open at the lower end, the collecting pipe 131 can be installed in the cavity from the open end below, the bottom guard plate When 140 is connected to the bottom of the side frame 111, the sealing cover cavity forms an isolation cavity 113.
  • the isolation cavity 113 structure even if leakage occurs at the collecting tube 131, it will not affect the internal circuit, and the collecting tube 131 is equivalent to being installed in the side frame 111 and does not affect the entire power battery Pack 100 battery density.
  • the heat exchange plate 130 in the interlayer between the bottom plate 112 and the bottom guard plate 140, the electrical safety of the power battery pack 100 can be effectively ensured, and the bottom guard plate 140 can protect and replace to some extent
  • the heat plate 130, the external heat exchange plate 130 does not occupy the space of the battery accommodating cavity, and the battery density of the entire power battery pack 100 is higher.
  • the single cells 120 include a battery shell, a battery cell arranged in the battery shell, and electrode terminals electrically connected to the battery core and extending from the battery shell, the single battery 120 and the bottom plate 112 fit.
  • the bottom plate 112 is made of metal material, and a thermally conductive insulating layer is provided between the single battery and the bottom plate 112.
  • the heat of the single battery is transferred to the bottom plate through the thermally conductive insulating layer and is dissipated through the bottom plate.
  • a plurality of single cells 120 are arranged side by side.
  • the single battery 120 is a rectangular battery with a rectangular parallelepiped structure, and has a length L, a thickness D, and a height H between the length L and the thickness D.
  • the thickness of the battery is arranged in the D direction. In this way, it is possible to realize high-density arrangement of the single cells not only in the accommodating cavity. And it is more conducive to the heat dissipation of the single battery.
  • the outermost two single batteries 120 along the thickness D direction of the single battery 120 may be equipped with end plates 180, and the single batteries 120 may be connected to the tray 111 through the end plates 180.
  • the bottom plate 112 of the metal material in the present application is used to protect the internal single cells 120 on the one hand, and on the other hand, the battery accommodating cavity can have a heat dissipation effect.
  • the bottom plate 112 can be made of a metal material with high thermal conductivity. , Including but not limited to aluminum, copper and their alloys.
  • the bottom plate 112 may be made of aluminum alloy material, which has good thermal conductivity, low density and low price.
  • the thermally conductive insulating layer arranged between the single battery and the bottom plate 112 can prevent the single battery 120 from being connected to the tray 110, and can also increase the contact area between the single battery 120 and the tray 110, which is beneficial to the dissipation of heat.
  • the thermally conductive insulating layer can be thermally conductive silica gel, which has good insulation and thermal conductivity.
  • the thermally conductive silica gel can conduct the heat of the single battery 120 to the tray 110 and the upper cover in time, and the thermally conductive silica gel is also It has a certain viscosity, and the single battery 120 can be bonded to the tray 110 through thermally conductive silica gel to facilitate the fixing of the single battery.
  • the heat exchange plate 130 and the bottom plate 112 are bonded by thermally conductive structural glue, and the surface of the heat exchange plate 130 and the outer surface of the bottom plate 112 are bonded by thermally conductive structural glue. In this way, the actual effective contact area between the heat exchange plate 130 and the bottom plate 112 is large.
  • the heat exchange plate 130 has an energy absorbing structure.
  • the heat exchange plate 130 is an integrated structure with flow passages inside.
  • the isolation ribs between adjacent flow passages can form the aforementioned energy absorbing structure, so that the overall structure of the heat exchange plate 130 has both Energy absorption.
  • the bottom protection plate 140 includes a main plate body and a heat preservation layer, and the heat preservation layer is provided on a side of the main plate body close to the heat exchange plate 130.
  • the main board body can be a metal plate, including a steel plate, etc.
  • the main board body can play a role in collision avoidance, and the thermal insulation layer can be a structure such as thermal insulation cotton. In this way, the bottom shield 140 has excellent mechanical strength, and at the same time can reduce the heat exchange between the package body and the outside.
  • the bottom shield 140 includes a main board body and a buffer layer, and the buffer layer is provided on a side of the main board body close to the heat exchange plate 130.
  • the main board body can be a metal plate, including a steel plate, etc.
  • the main board body can play a role of anti-collision
  • the buffer layer is used to absorb external impact
  • the buffer layer includes a structure such as a rubber layer. In this way, the bottom guard plate 140 has excellent mechanical strength and mechanical impact resistance.
  • a power battery pack 100 includes a tray 110 and an upper cover.
  • the tray 110 includes a side frame 111 and a bottom plate 112.
  • the upper cover and the bottom plate 112 are respectively connected to the upper and lower ends of the side frame 111 to
  • a battery accommodating cavity is defined; a single battery, the single battery is installed in the battery accommodating cavity; a bottom shield 140, the bottom shield 140 is connected to the lower end of the side frame 111, and the bottom shield
  • the plate 140 is spaced from the bottom plate 112 in the vertical direction; a heat exchange plate 130, the heat exchange plate 130 is sandwiched between the bottom guard plate 140 and the bottom plate 112.
  • the single battery is multiple, and the single battery includes a battery case, a battery cell provided in the battery case, and electrode terminals electrically connected to the battery core and extending from the battery case , The single battery is attached to the bottom plate 112.
  • a thermally conductive insulating layer is provided between the single battery and the bottom plate 112.
  • the heat exchange plate 130 and the bottom plate 112 are bonded by thermally conductive structural glue.
  • the heat exchange plate 130 has a heat exchange cavity, and the heat exchange cavity is used for the circulation of heat exchange medium.
  • the heat exchange plate 130 has an energy absorbing structure.
  • the bottom protection plate 140 includes a main plate body and a heat preservation layer, and the heat preservation layer is provided on a side of the main plate body close to the heat exchange plate 130.
  • the bottom protection plate 140 includes a main plate body and a buffer layer, and the buffer layer is provided on a side of the main plate body close to the heat exchange plate 130.
  • the application also discloses a vehicle 1000.
  • the vehicle 1000 of the embodiment of the present application has the power battery pack 100 of any of the foregoing embodiments.
  • the vehicle 1000 in the embodiment of the present application may be an electric vehicle 1000, including an electric passenger car or an electric bus.
  • the power battery pack 100 may be installed on the chassis of the vehicle 1000.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un bloc-batterie d'alimentation et un véhicule. Le bloc-batterie d'alimentation comprend un plateau et un couvercle supérieur, le plateau comprenant un cadre latéral et une plaque inférieure, et le couvercle supérieur et la plaque inférieure étant respectivement reliés à l'extrémité supérieure et à l'extrémité inférieure du cadre latéral pour définir une chambre de réception de batterie ; un élément de batterie monté dans la chambre de réception de batterie ; une plaque de protection inférieure reliée à l'extrémité inférieure du cadre latéral et espacée de la plaque inférieure dans la direction verticale ; et une plaque d'échange de chaleur prise en sandwich entre la plaque de protection inférieure et la plaque inférieure.
PCT/CN2019/097480 2019-06-21 2019-07-24 Bloc-batterie d'alimentation et véhicule WO2020252848A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201920960285.1 2019-06-21
CN201920960285.1U CN209766605U (zh) 2019-06-21 2019-06-21 动力电池包和车辆

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WO2020252848A1 true WO2020252848A1 (fr) 2020-12-24

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PCT/CN2019/097480 WO2020252848A1 (fr) 2019-06-21 2019-07-24 Bloc-batterie d'alimentation et véhicule

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WO (1) WO2020252848A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114927824A (zh) * 2022-06-30 2022-08-19 东风(武汉)实业有限公司 一种电池包连接装置
CN115249866A (zh) * 2022-07-19 2022-10-28 集瑞联合重工有限公司 电池包安装结构、车架组件及车辆

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4099351A4 (fr) * 2020-01-31 2023-07-05 Panasonic Intellectual Property Management Co., Ltd. Module de stockage électrique
CN113937390B (zh) * 2021-10-11 2023-10-24 衢州市智能制造技术与装备研究院 一种模块化装配的防尘车载电池热管理机构
CN114987616B (zh) * 2022-06-28 2024-02-23 东风汽车集团股份有限公司 一种车辆的底板组件

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108365156A (zh) * 2018-04-24 2018-08-03 北京新能源汽车股份有限公司 电池包和车辆
CN109244302A (zh) * 2018-10-19 2019-01-18 银隆新能源股份有限公司 电池包结构

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108365156A (zh) * 2018-04-24 2018-08-03 北京新能源汽车股份有限公司 电池包和车辆
CN109244302A (zh) * 2018-10-19 2019-01-18 银隆新能源股份有限公司 电池包结构

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114927824A (zh) * 2022-06-30 2022-08-19 东风(武汉)实业有限公司 一种电池包连接装置
CN114927824B (zh) * 2022-06-30 2024-02-06 东实(武汉)实业有限公司 一种电池包连接装置
CN115249866A (zh) * 2022-07-19 2022-10-28 集瑞联合重工有限公司 电池包安装结构、车架组件及车辆
CN115249866B (zh) * 2022-07-19 2024-04-12 集瑞联合重工有限公司 电池包安装结构、车架组件及车辆

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