WO2020140336A1 - 一种电池包 - Google Patents

一种电池包 Download PDF

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Publication number
WO2020140336A1
WO2020140336A1 PCT/CN2019/079640 CN2019079640W WO2020140336A1 WO 2020140336 A1 WO2020140336 A1 WO 2020140336A1 CN 2019079640 W CN2019079640 W CN 2019079640W WO 2020140336 A1 WO2020140336 A1 WO 2020140336A1
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WO
WIPO (PCT)
Prior art keywords
battery
cooling plate
electrode assembly
battery pack
pole piece
Prior art date
Application number
PCT/CN2019/079640
Other languages
English (en)
French (fr)
Inventor
金海族
游凯杰
侯跃攀
胡飞
王鹏
李振华
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to US17/418,762 priority Critical patent/US20220077521A1/en
Priority to DK19906933.7T priority patent/DK3886226T3/da
Priority to EP19906933.7A priority patent/EP3886226B1/en
Priority to ES19906933T priority patent/ES2939540T3/es
Publication of WO2020140336A1 publication Critical patent/WO2020140336A1/zh

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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
    • H01M10/6554—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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0463—Cells or batteries with horizontal or inclined electrodes
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • 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
    • H01M50/249—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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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
    • 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

  • the present application relates to the technical field of batteries, in particular to a battery pack.
  • the battery pack includes a plurality of battery modules, and the battery module includes a plurality of arranged battery cells. Since the battery cell generates heat during charging and discharging, it is necessary to install a cooling system (such as a cooling plate) on the battery pack. However, due to manufacturing problems, the surface of the cooling plate and the surface of the case cannot be absolutely flat, so the contact area of the cooling plate and the case is small, thereby reducing the heat dissipation area and the heat dissipation effect of the cooling plate.
  • a cooling system such as a cooling plate
  • the inventor provides a battery pack including: a box body including an upper box cover and a lower box body, the upper box cover and the lower box body being sealedly arranged; a plurality of battery modules , Accommodated in the box, the battery module includes a plurality of battery cells arranged in a horizontal direction and a plurality of bus bars 22 electrically connected to the plurality of battery cells, the battery cells include an electrode assembly and The electrode assembly is contained in the battery case, the electrode assembly includes a first pole piece, a second pole piece, and a separator disposed between the first pole piece and the second pole piece; cooling A plate located on one side of the battery module in the vertical direction; and a buffer member provided between the cooling plate and the box, the elastic modulus of the buffer member being smaller than the elasticity of the cooling plate Modulus and elastic modulus of the box; wherein, the electrode assembly has a wound structure and is flat, the outer surface of the electrode assembly includes two flat surfaces, and the two flat surfaces are along the The vertical directions face each other
  • both side surfaces of the buffer member are in contact with the box body and the cooling plate, respectively, and the cooling plate is fixed to the box body by the buffer member.
  • the buffer member is a thermally conductive structural adhesive, and both surfaces of the thermally conductive structural adhesive are respectively adhered to the box body and the cooling plate; or, the buffer member is a thermally conductive pad, and the thermally conductive pad is fixed at Between the cooling plate and the box.
  • the size of the battery module in the horizontal direction is larger than the size of the battery module in the vertical direction.
  • the cooling plate is provided outside the box.
  • the battery pack has two cooling plates, and the two cooling plates are located above and below the case, respectively.
  • the cooling plate is provided inside the box; and, a thermally conductive structural adhesive is provided between the bottom surface of the battery module and the inner bottom surface of the box; and/or, the top surface of the battery module A heat conductive structural adhesive is arranged between the inner top surface of the box body.
  • a fluid channel is provided inside the cooling plate, the fluid channel extends in the horizontal direction, and an inlet and an outlet of the fluid channel are located at the same end of the cooling plate in the horizontal direction.
  • the battery cell has a plurality of the electrode assemblies, and the plurality of electrode assemblies are stacked in the vertical direction.
  • the elastic modulus of the buffer member is 2GPa-5GPa
  • the elastic modulus of the cooling plate is 50GPa-150GPa
  • the elastic modulus of the box is 50GPa-150GPa.
  • the above technical solution lays the battery cells flat, that is, when the electrode assembly has a wound structure, it is flat, and the outer surface of the electrode assembly includes two flat surfaces, and the two flat surfaces are along the vertical direction Facing each other; when the electrode assembly is a laminated structure, the first pole piece, the separator, and the second pole piece are laminated in the vertical direction. Therefore, the maximum expansion force generated by the battery cell electrode assembly during charging and discharging is in the vertical direction.
  • the cooling plate is located on the side of the battery module in the vertical direction (ie, the direction of maximum expansion force), and a buffer member is provided between the cooling plate and the box (the elastic modulus of the buffer member is less than the elastic modulus of the cooling plate And the elastic modulus of the box, that is, the buffer member is soft), so the battery unit can be used to apply the maximum expansion force to the buffer member to make the buffer member close to the cooling plate and the box at the same time, thereby increasing the heat dissipation area to improve cooling The cooling effect of the board.
  • FIG. 1 is a schematic diagram of a box of a battery pack according to a specific embodiment
  • FIG. 2 is an exploded view of the battery pack according to a specific embodiment, in which the cooling plate is located above the box;
  • FIG. 3 is an exploded view of the battery pack according to a specific embodiment, in which the cooling plate is located under the box;
  • FIG. 4 is an exploded view of the battery pack according to a specific embodiment, in which the upper and lower sides of the box have cooling plates;
  • FIG. 5 is an exploded view of the battery pack according to a specific embodiment, in which the cooling plate is located inside the box;
  • FIG. 6 is a schematic diagram of a cooling plate of a battery pack according to a specific embodiment
  • FIG. 7 is a schematic diagram of a battery module of a battery pack according to a specific embodiment
  • FIG. 8 is an exploded view of a battery cell of a battery pack according to a specific embodiment
  • FIG. 9 is a cross-sectional view of a battery cell having a wound structure of a battery pack according to a specific embodiment
  • FIG. 10 is a cross-sectional view of a battery cell having a laminated structure of a battery pack according to a specific embodiment.
  • 21a an electrode assembly of a wound structure
  • 21b an electrode assembly of a laminated structure
  • connection refers to more than two; the terms “connection” and “fixation” should be understood in a broad sense.
  • connection may be a fixed connection, a detachable connection, or an integral connection, Or electrical connection; it can be directly connected or indirectly connected through an intermediary.
  • the direction indicated by arrow X is the length direction
  • the direction indicated by arrow Y is the width direction
  • the direction indicated by arrow Z is the vertical direction.
  • the horizontal direction is a direction parallel to the horizontal plane, and may be the above-mentioned longitudinal direction or the above-mentioned width direction.
  • the horizontal direction includes not only the direction absolutely parallel to the horizontal plane, but also the direction generally parallel to the horizontal plane conventionally recognized in engineering.
  • the vertical direction is a direction perpendicular to the horizontal plane.
  • the vertical direction includes not only the direction absolutely perpendicular to the horizontal plane, but also the direction generally perpendicular to the horizontal plane conventionally recognized in engineering.
  • this embodiment provides a battery pack, which includes: a case 1, a plurality of battery modules 2, a cooling plate 3 and a buffer member 4.
  • the case 1 includes an upper case cover 11 and a lower case 12 (as shown in FIG. 1 ).
  • the upper case cover 11 is located above the lower case 12, and the upper case cover 11 and the lower case 12 are sealed.
  • the upper case cover 11 and the lower case body 12 are hermetically sealed to prevent external moisture from entering the battery pack and causing a short circuit.
  • the battery pack can be used to install directly on the vehicle, thereby providing a source of power for the vehicle.
  • a plurality of battery modules 2 are provided in the case 1, and the buffer member 4 is provided between the cooling plate 3 and the case 1 because the elastic modulus of the buffer member 4 is smaller than the elastic modulus of the cooling plate 3 and the case 1
  • the elastic modulus of the buffer member 4 is relatively soft, so the battery unit can be used to apply the maximum expansion force to the buffer member 4, so that the buffer member 4 is closely attached to the cooling plate 3 and the box 1, thereby increasing the heat dissipation area to Improve the cooling effect of the cooling plate 3.
  • the cooling plate 3 is installed outside the cabinet 1.
  • the plate surface of the cooling plate 3 is parallel to the horizontal plane (the plane where the X axis and the Y axis are located), and the cooling plate 3 is attached to the cabinet 1 so that the cooling plate 3 is installed in the cabinet 1 between the X axis and the Y
  • the outer surface of the box 1 where the shaft is located.
  • the horizontal outer side of the cabinet 1 located on the plane where the X axis and the Y axis are located
  • the first surface 2121 of the battery cells of the battery module are parallel to each other, so that the cooling area of the cooling plate 3 and the battery pack is larger, and the battery is improved The cooling effect of the package.
  • a cooling plate 3 can be installed above and below the cabinet 1, that is, the horizontal outer side of the cabinet 1 (located on two planes where the X axis and the Y axis are located), so The upper and lower sides of the cabinet 1 are cooled and dissipated to improve the cooling efficiency.
  • the two side surfaces of the buffer member 4 are in contact with the cabinet 1 and the cooling plate 3 respectively, and the cooling plate 3 is fixed to the cabinet 1 by the buffer member 4.
  • one side surface of the buffer member 4 is fixed to the case 1, and the other side surface of the buffer member 4 is fixed to the cooling plate 3.
  • the fixing method can be fixed by bonding, bolting, riveting and so on. It is achieved that the heat radiation area between the buffer member 4 and the cabinet 1 and the cooling plate 3 is increased.
  • the buffer member 4 when the buffer member 4 is a thermally conductive structural adhesive, the viscosity of the thermally conductive structural adhesive can be completely adhered between the cooling plate 3 and the cabinet 1, thereby filling the gap between the cabinet 1 and the cooling plate 3, so that the box The contact area between the body 1 and the cooling plate 3 is increased, and the thermally conductive structural adhesive also has good thermal conductivity, so the cabinet 1 can be cooled and dissipated well.
  • the buffer member 4 is a thermal pad
  • the thermal pad is installed in a fixed manner, that is, fixed between the cooling plate 3 and the cabinet 1 by means of bonding, bolting, riveting, etc., so that the cooling plate 3 is stabilized Laminated on the cabinet 1.
  • the thermal pad is a high-performance gap-filling thermal conductive material, it is mainly used for the transfer interface between the electronic device and the heat sink or product casing. It has good viscosity, flexibility, good compression performance and excellent thermal conductivity. In use, it can completely exhaust the air between the electronic original and the heat sink to achieve full contact. The heat dissipation effect is obviously increased.
  • the elastic modulus of the buffer member 4 is 2GPa-5GPa
  • the elastic modulus of the cooling plate 3 is 50GPa-150GPa
  • the elastic modulus of the cabinet 1 is 50GPa-150GPa. Therefore, it can be known that the elastic modulus of the cushioning member 4 is much smaller than that of the cooling plate 3 and the cabinet 1, that is, the cushioning member 4 is more flexible than the cooling plate 3 and the cabinet 1. Therefore, when the cooling plate 3 is fixed to the cabinet 1 through the buffer member 4, the flexibility of the buffer member 4 can be used to fill the gap between the cooling plate 3 and the cabinet 1, increasing the heat dissipation area and improving the cooling effect And efficiency.
  • the cooling plate 3 can be placed inside the cabinet 1, and the plate surface of the cooling plate 3 is also parallel to the horizontal plane (the plane where the X axis and the Y axis are located). It is arranged on the common horizontal plane where the first surfaces 2121 of the plurality of battery cells of the plurality of battery modules 2 and/or the bottom layer of the plurality of battery cells are located, to ensure that the battery cells and the cooling plate 3 are adhered with the maximum contact surface. At the same time, in order to ensure that there is no gap between the battery module and the cooling plate 3, the cooling plate 3 is closely adhered to the plurality of battery modules 2 through the thermally conductive structural adhesive to improve the cooling and radiating area and cooling efficiency of the battery module.
  • a fluid channel 31 is provided inside the cooling plate 3, and the fluid channel 31 extends in the horizontal direction (X-axis direction) in the cooling plate 3, and the material of the cooling plate 3 can be made of metal, specifically aluminum , Aluminum alloy, magnesium aluminum alloy, steel, etc.
  • the center line of the fluid channel 31 is parallel to the side of the cooling plate 3 in the vertical plane (the plane where the Z axis and the X axis are located), and the inlet and outlet of the fluid channel 31 are arranged on the side of the same cooling plate 3 ( That is, it may be one of the two sides of the cooling plate 3 where the Y axis and the Z axis are located, so that the fluid passage 31 forms a reciprocating flow in the cooling plate 3.
  • the inlet cooling medium is distributed in the cooling plate 3, and the temperature difference of the cooling medium at both ends of the cooling plate 3 is small, and the cooling effect of the cooling plate 3 is improved.
  • the plurality of battery modules 2 includes a plurality of battery cells 21 arranged in a horizontal direction (for example, a length direction indicated by an arrow x) and a plurality of bus bars 22 electrically connected to the plurality of battery cells 21.
  • the battery cell 21 includes an electrode assembly 211, a battery case 212, an electrode terminal connector 213 and a cover plate 214.
  • the battery case 212 may have a hexahedral shape or other shapes.
  • the battery case 212 has an internal space that accommodates the electrode assembly 211 and the electrolyte, and the battery case 212 has an opening.
  • the electrode assembly 211 is accommodated in the battery case 212, the cover plate 214 covers the opening, and is used to close the electrode assembly 211 in the battery case 212, and the electrode assembly 211 and the electrode terminal are electrically connected by an electrode terminal connector 213.
  • the battery case 212 may be made of materials such as aluminum, aluminum alloy, or plastic.
  • the electrode assembly 211 is accommodated in the battery case 212.
  • the electrode assembly 211 includes a first pole piece 2111, a second pole piece 2112, and a separator 2113 disposed between the first pole piece 2111 and the second pole piece 2112.
  • the first pole piece 2111 may be a positive pole piece or a negative pole piece
  • the second pole piece 2112 is opposite in polarity to the first pole piece 2111, and accordingly, the second pole piece 2112 is a negative pole piece or a positive pole piece.
  • the diaphragm 2113 is an insulator between the first pole piece 2111 and the second pole piece 2112.
  • the electrode assembly 211 may be a wound structure (as shown in FIG. 9) or a laminated structure (as shown in FIG. 10).
  • the first pole piece 2111 is used as the positive electrode piece, and the second pole piece 2112 is used as the negative electrode piece.
  • the first pole piece 2111 may also be a negative pole piece, and the second pole piece 2112 is a positive pole piece.
  • the positive electrode active material is coated on the coating area of the positive electrode sheet
  • the negative electrode active material is coated on the coating area of the negative electrode sheet.
  • the uncoated area extending from the coated area serves as the tab.
  • the electrode assembly 211 includes two tabs, namely a positive tab and a negative tab.
  • the positive tab extends from the coated area of the positive tab; the negative tab from the negative tab
  • the coating zone extends.
  • the positive ear and the positive electrode terminal are electrically connected by a positive connector, and the negative ear and the negative electrode terminal are electrically connected by a negative connector.
  • the battery case 212 is substantially a hexahedral structure.
  • the battery case 212 includes two first surfaces 2121 and two second surfaces 2122.
  • the area of the first surface 2121 is larger than the area of the second surface 2122.
  • the two second surfaces 2122 of each battery cell 21 face each other in the horizontal direction (for example, the direction indicated by the X axis), and the two first surfaces 2121 of each battery cell 21 Face each other in the vertical direction (the direction indicated by the Z axis).
  • the electrode assembly 211 when the electrode assembly 211 has a wound structure, the electrode assembly 211 is flat, and the outer surface of the electrode assembly 211 includes two flat surfaces 2110 (as shown in FIG. 8 ), and two flat surfaces 2110 Face each other in the vertical direction, that is, the flat surface 2110 and the first surface 2121 face each other.
  • the electrode assembly 211 is generally a hexahedral structure, and the flat surface 2110 is substantially parallel to the winding axis and is the outer surface with the largest area.
  • the flat surface 2110 may only be a relatively flat surface, and is not required to be purely flat.
  • the first pole piece 2111, the separator 2113, and the second pole piece 2112 are vertically stacked, that is, the surface of the first pole piece 2111 and the first surface 2121 Face each other.
  • the electrode assembly 211 inevitably expands in the thickness direction of the first pole piece 2111 during charging and discharging (in the wound electrode structure 211, the expansion force is greatest in the direction perpendicular to the flat surface 2110; In the electrode assembly 211 of the structure, the expansion force is greatest along the stacking direction of the first pole piece 2111 and the second pole piece 2112).
  • the flat surface 2110 of the wound electrode assembly 211 faces the vertical direction (the direction indicated by the Z axis).
  • the first pole piece 2111 and the second pole piece 2112 of the electrode assembly 211 of the laminated structure are laminated in the vertical direction (the direction indicated by the Z axis). It can be seen that, whether the electrode assembly 211 adopts the wound structure or the laminated structure, the direction in which the electrode assembly applies the maximum expansion force to the battery case 212 is oriented in the vertical direction.
  • the direction in which the electrode assembly exerts the maximum expansion force on the battery case 212 is all toward the horizontal direction, because the size of the battery module 2 in the horizontal direction is compared to that in the vertical direction
  • the size is much larger (for example, due to the height limitation of the chassis of the vehicle, more battery cells need to be stacked in the horizontal direction, and the cumulative expansion force is large), therefore, the expansion force of the existing battery module in the horizontal direction is very large Therefore, it is necessary to provide very thick end plates on both sides of the battery module in the horizontal direction to resist the expansion force, and thickening the end plates will reduce the energy density of the battery module.
  • the direction in which the electrode assembly applies the maximum expansion force to the battery case 212 is toward the vertical direction, and the number of battery cells stacked in the vertical direction is small, so compared with the prior art, it can be greatly Reduce the maximum expansion force of the battery module.
  • Each of the electrode assemblies 211 of the battery cell 21 has a plurality, and the plurality of electrode assemblies 211 are stacked along the Z-axis direction in the drawing.
  • there are two electrode assemblies 211 of the wound structure 21 a for example, there are two electrode assemblies 211.
  • the flat surfaces 2110 of the two electrode assemblies 211 are stacked along the Z axis, and the first pole piece 2111 and the second pole piece 2112 of the two motor assemblies are connected and bonded respectively, and then the two stacked motor assemblies are placed in the battery case Within 212, the purpose of stacking the flat surfaces 2110 along the Z-axis direction is achieved.
  • FIG. 9 there are two electrode assemblies 211 of the wound structure 21 a, for example, there are two electrode assemblies 211.
  • the flat surfaces 2110 of the two electrode assemblies 211 are stacked along the Z axis, and the first pole piece 2111 and the second pole piece 2112 of the two motor assemblies are connected and bonded respectively, and then the two stacked motor assemblies are placed in the battery case Within 212
  • the electrode assembly 211 of the laminated structure 21b is also stacked along the Z-axis direction, and the height of the stack is flexibly set according to the height of the opening of the battery case 212 (such as attached In the figure, the height of the battery case in the Z-axis direction), the direction in which the electrode assembly 211 applies the maximum expansion force to the battery case 212 is all toward the Z-axis direction.
  • the size of the battery module in the horizontal direction is larger than the size of the battery module in the vertical direction (for example, Z-axis direction).
  • the battery cells 21 in the casing 1 will expand, so that the casing 1 will have a certain deformation (expansion deformation from inside to outside), so the buffer member 4 will be pressed In this way, the bonding between the cooling plate 3 and the box 1 is more tight, and the buffer member 4 will not be damaged due to its own flexibility, thereby improving the cooling and heat dissipation effect.

Abstract

本申请提供一种电池包，包括：箱体(1)、多个电池模块(2)、冷却板(3)和缓冲构件(4)，电池模块(2)包括多个电池单体(21)和多个汇流排(22)，电池单体(21)包括电极组件(211)和电池壳体(212)，将电池单体(21)平躺放置，即当电极组件(211)为卷绕式结构时为扁平状，电极组件(211)的外表面包括两个扁平面(2110)，两个扁平面(2110)沿竖直方向相互面对；当电极组件(211)为叠片式结构时，第一极片(2111)、隔膜(2113)和第二极片(2112)沿竖直方向层叠。因此电池单体(21)的电极组件(211)在充放电时产生的最大膨胀力是沿竖直方向的。由于冷却板(3)是位于电池模块(2)的沿竖直方向的一侧，并且在冷却板(3)和箱体(1)之间设置了缓冲构件(4)，因此可以利用电池单体(21)对缓冲构件(4)施加最大的膨胀力，以使缓冲构件(4)同时贴紧冷却板(3)和箱体(1)，从而增加散热面积以提高冷却板(3)的散热效果。

Description

一种电池包
交叉引用
本申请引用于2018年12月30日递交的名称为“一种电池包”的第201822275458.4号中国专利申请，其通过引用被全部并入本申请。
技术领域
本申请涉及电池技术领域，尤其涉及一种电池包。
背景技术
电池包包括多个电池模块，电池模块包括多个排列的电池单体。由于电池单体在充放电过程中会发热，因此需要给电池包安装冷却系统(例如冷却板)。然而，由于制造问题，冷却板的表面和箱体的表面不可能为绝对平面，因此冷却板和箱体的接触面积较小，从而减小了散热面积，降低了冷却板的散热效果。
申请内容
为此，需要提供一种电池包，用于解决现有技术中冷却板冷却效果较差的问题。
为实现上述目的，发明人提供了一种电池包，包括：箱体，所述箱体包括上箱盖和下箱体，所述上箱盖与所述下箱体密封设置；多个电池模块，容纳 于所述箱体内，所述电池模块包括沿水平方向排列的多个电池单体以及与所述多个电池单体电连接的多个汇流排22，所述电池单体包括电极组件和中，所述电极组件容纳于所述电池壳体内，所述电极组件包括第一极片、第二极片以及设置于所述第一极片和所述第二极片之间的隔膜；冷却板，位于所述电池模块的沿竖直方向的一侧；以及，缓冲构件，设置在所述冷却板和所述箱体之间，所述缓冲构件的弹性模量小于所述冷却板的弹性模量以及所述箱体的弹性模量；其中，所述电极组件为卷绕式结构且为扁平状，所述电极组件的外表面包括两个扁平面，两个所述扁平面沿所述竖直方向相互面对；或，所述电极组件为叠片式结构，所述第一极片、所述隔膜和所述第二极片沿所述竖直方向层叠。
例如，所述缓冲构件的两侧表面分别与所述箱体以及所述冷却板接触，所述冷却板通过所述缓冲构件固定于所述箱体。
例如，所述缓冲构件为导热结构胶，所述导热结构胶的两侧表面分别粘接于所述箱体以及所述冷却板；或，所述缓冲构件为导热垫，所述导热垫固定在所述冷却板和所述箱体之间。
例如，所述电池模块沿所述水平方向的尺寸大于所述电池模块沿所述竖直方向的尺寸。
例如，所述冷却板设置在所述箱体的外部。
例如，所述电池包具有两个所述冷却板，两个所述冷却板分别位于所述箱体的上方和下方。
例如，所述冷却板设置在所述箱体的内部；并且，所述电池模块的底面与所述箱体的内底面之间设置有导热结构胶；和/或，所述电池模块的顶面与所述箱体的内顶面之间设置有导热结构胶。
例如，所述冷却板的内部设置有流体通道，所述流体通道沿所述水平方向延伸，所述流体通道的入口与出口位于所述冷却板的沿所述水平方向的同一端。
例如，所述电池单体具有多个所述电极组件，并且多个所述电极组件沿所述竖直方向堆叠。
例如，所述缓冲构件的弹性模量为2GPa-5GPa，所述冷却板的弹性模量为50GPa-150GPa，所述箱体的弹性模量为50GPa-150GPa。
区别于现有技术，上述技术方案将电池单体平躺放置，即当电极组件为卷绕式结构时为扁平状，电极组件的外表面包括两个扁平面，两个扁平面沿竖直方向相互面对；当电极组件为叠片式结构时，第一极片、隔膜和第二极片沿竖直方向层叠。因此电池单体的电极组件在充放电时产生的最大膨胀力是沿竖直方向的。由于冷却板是位于电池模块的沿竖直方向的一侧(即最大膨胀力方向)，并且在冷却板和箱体之间设置了缓冲构件(缓冲构件的弹性模量小于冷却板的弹性模量以及箱体的弹性模量，即缓冲构件较软)，因此可以利用电池单体对缓冲构件施加最大的膨胀力，以使缓冲构件同时贴紧冷却板和箱体，从而增加散热面积以提高冷却板的散热效果。
附图说明
图1为具体实施例所述的电池包的箱体的示意图；
图2为具体实施例所述的电池包的爆炸图，其中冷却板位于箱体上方；
图3为具体实施例所述的电池包的爆炸图，其中冷却板位于箱体下方；
图4为具体实施例所述的电池包的爆炸图，其中箱体上下方都具有冷却 板；
图5为具体实施例所述的电池包的爆炸图，其中冷却板位于箱体内部；
图6为具体实施例所述的电池包的冷却板的示意图；
图7为具体实施例所述的电池包的电池模块的示意图；
图8为具体实施例所述的电池包的电池单体的爆炸图；
图9为具体实施例所述的电池包的具有卷绕式结构的电池单体的剖视图；
图10为具体实施例所述的电池包的具有叠片式结构的电池单体的剖视图。
附图标记说明：
1、箱体；
11、上箱盖；12、下箱体；
2、电池模块；
21、电池单体；22、汇流排；
211、电极组件；212、电池壳体；213、电极端子连接件；214、盖板；
21a、卷绕式结构的电极组件；21b、叠片式结构的电极组件；
2110、扁平面；2111、第一极片；2112、第二极片；
2113、隔膜；2121、第一表面；2122、第二表面；
3、冷却板；
31、循环流体通道；
4、缓冲构件。
具体实施例
为详细说明技术方案的技术内容、构造特征、所实现目的及效果，以下结合具体实施例并配合附图详予说明。
在本申请的描述中，除非另有明确的规定和限定，术语“第一”、“第二”、仅用于描述的目的，而不能理解为指示或暗示相对重要性；除非另有规定或说明，术语“多个”是指两个以上；术语“连接”、“固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接，或电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本申请的描述中，所有附图中箭头X所指方向为长度方向，箭头Y所指方向为宽度方向，箭头Z所指方向为竖直方向。水平方向为平行于水平面的方向，既可以是上述长度方向也可以是上述宽度方向。另外，水平方向不仅包括绝对平行于水平面的方向，也包括了工程上常规认知的大致平行于水平面的方向。竖直方向为垂直于水平面的方向，竖直方向不仅包括绝对垂直于水平面的方向，也包括了工程上常规认知的大致垂直于水平面的方向。此外，本申请描述的“上”、“下”、“顶”、“底”等方位词均是相对于竖直方向来进行理解的。为了便于理解和说明，下文中会根据附图内的X、Y、Z坐标系进行方向的描述。
如图1至图6所示，本实施提供一种电池包，包括：箱体1、多个电池模块2、冷却板3和缓冲构件4。箱体1包括上箱盖11以及下箱体12(如图1所示)，上箱盖11位于下箱体12的上方，上箱盖11与下箱体12密封设置。上箱盖11与下箱体12之间密封设置，可以避免外部水分进入电池包内部从而 引发短路。电池包可用于直接安装于车辆上，从而为车辆提供动力来源。
其中，多个电池模块2设置在箱体1内，缓冲构件4则设置在冷却板3与箱体1之间，因为缓冲构件4的弹性模量小于冷却板3的弹性模量以及箱体1的弹性模量，即缓冲构件4相对较软，因此可以利用电池单体对缓冲构件4施加最大的膨胀力，以使缓冲构件4同时贴紧冷却板3和箱体1，从而增加散热面积以提高冷却板3的散热效果。
如图2和图3所示，将冷却板3安装在箱体1的外部。例如，将冷却板3的板面平行于水平面(X轴与Y轴所在的平面)，并在箱体1上贴合安装冷却板3，使得冷却板3安装在箱体1位于X轴与Y轴所在的箱体1外侧面上。而且，箱体1的水平外侧面(位于X轴与Y轴所在的平面)与电池模块的电池单体的第一表面2121相互平行，使得冷却板3与电池包的散热面积较大，提高电池包的冷却散热的效果。
另外如图4所示，本实施中可以在箱体1的上方和下方都安装一块冷却板3，即箱体1的水平外侧面(位于X轴与Y轴所在的两个平面)，因此在箱体1的上、下两面进行冷却散热，提高其冷却的效率。
本实施例中，缓冲构件4的两侧表面分别与箱体1以及冷却板3接触，冷却板3通过缓冲构件4固定于箱体1。例如，缓冲构件4的一侧表面固定在箱体1上，而缓冲构件4的另一侧表面则固定在冷却板3上。固定的方式可以采用粘接、螺栓连接、铆接等等方式进行固定。达到将缓冲构件4与箱体1和冷却板3之间的散热面积增加。
本实施例中缓冲构件4为导热结构胶时，通过导热结构胶的粘性可以完全贴合在冷却板3与箱体1之间，进而填补箱体1与冷却板3之间的空隙，使 得箱体1与冷却板3之间的接触面积增加，并且导热结构胶还具有良好的导热性能，因此可以对箱体1进行良好的冷却散热。当缓冲构件4为导热垫时，导热垫则通过固定的方式进行安装，即通过粘接、螺栓连接、铆接等等方式固定在冷却板3与箱体1之间，使得冷却板3被稳固的贴合在箱体1上。又因为导热垫是高性能间隙填充导热材料，主要用于电子设备与散热片或产品外壳间的传递界面。具有良好的粘性、柔性、良好的压缩性能以及具有优良的热传导率。使其在使用中能完全使电子原件和散热片之间的空气排出，以达到接触充分。散热效果明显增加。
具体的，缓冲构件4的弹性模量为2GPa-5GPa，而冷却板3的弹性模量为50GPa-150GPa，箱体1的弹性模量为50GPa-150GPa。因此可以知晓缓冲构件4的弹性模量远小于冷却板3与箱体1的弹性模量，即缓冲构件4比之冷却板3与箱体1更加的柔软。所以可以在将冷却板3通过缓冲构件4固定于箱体1上时，利用缓冲构件4的柔软性使得冷却板3与箱体1之间的间隙被填充，增加其散热面积，提高冷却的效果和效率。
如图5所示，可以将冷却板3放置于箱体1的内部，且冷却板3的板面也平行于水平面(X轴与Y轴所在的平面)，冷却板3的一侧板面贴合设置在多个电池模块2的顶层和/或底层多个电池单体的第一表面2121所在的共同水平面上，保证电池单体与冷却板3之间的以最大接触面进行贴合。同时为了保证电池模块与冷却板3之间不会具有间隙，通过导热结构胶将冷却板3紧密粘贴在多个电池模块2上，提高电池模块的冷却散热面积和冷却效率。
如图6所示，冷却板3的内部开设流体通道31，流体通道31在冷却板3内沿着水平方向(X轴方向)延伸，而冷却板3材质可以为金属进行制作，具体 的可以铝、铝合金、镁铝合金、钢等等。例如，流体通道31的中心线与冷却板3位于竖直面(Z轴与X轴所在的面)的侧面平行，并将该流体通道31的入口与出口设置在同一冷却板3的侧面上(即可以是在Y轴与Z轴所在的冷却板3的两侧面中的一个)，使得流体通道31在冷却板3内形成一个往返的流动。使得有入口输入的冷却介质在冷却板3内分布均与，并使得冷却板3两端的冷却介质的温差较小，提高冷却板3的冷却效果。
如图7所示，多个电池模块2包括沿水平方向(例如，箭头x所指的长度方向)排列的多个电池单体21以及电连接多个电池单体21的多个汇流排22。
如图8所示，电池单体21包括电极组件211、电池壳体212、电极端子连接件213以及盖板214。电池壳体212可具有六面体形状或其他形状。电池壳体212具有容纳电极组件211和电解液的内部空间，并且电池壳体212具有开口。电极组件211容纳在电池壳体212内，盖板214覆盖开口，并用于将电极组件211封闭在电池壳体212内，电极组件211与电极端子之间通过电极端子连接件213电连接。本实施例中，电极端子连接件213有两个，即分别为正极连接件和负极连接件。电池壳体212可以由例如铝、铝合金或塑料等材料制造。
电极组件211容纳于电池壳体212内，电极组件211包括第一极片2111、第二极片2112以及设置于所述第一极片2111和所述第二极片2112之间的隔膜2113。第一极片2111可以是正极片或负极片，第二极片2112与第一极片2111的极性相反，相应地，第二极片2112为负极片或正极片。其中，隔膜2113是介于第一极片2111和第二极片2112之间的绝缘体。电极组件211可以是卷绕式结构(如图9所示)，也可以是叠片式结构(如图10所示)。
示例性地以第一极片2111为正极片，第二极片2112为负极片进行说明。同样地，在其他的实施例中，第一极片2111还可以为负极片，而第二极片2112为正极片。另外，正极活性物质被涂覆在正极片的涂覆区上，而负极活性物质被涂覆到负极片的涂覆区上。从涂覆区延伸出的未涂覆区则作为极耳，电极组件211包括两个极耳，即正极耳和负极耳，正极耳从正极片的涂覆区延伸出；负极耳从负极片的涂覆区延伸出。正极耳与正电极端子之间通过正极连接件电连接，负极耳与负电极端子之间通过负极连接件电连接。
如图8所示，电池壳体212大致为六面体结构，电池壳体212包括两个第一表面2121和两个第二表面2122，第一表面2121的面积大于第二表面2122的面积。在电池单体21排列结构中，每个电池单体21的两个第二表面2122沿水平方向(例如X轴所指方向)相互面对，每个电池单体21的两个第一表面2121沿竖直方向(Z轴所指方向)相互面对。
如图9所示，当电极组件211为卷绕式结构时，电极组件211为扁平状，并且电极组件211的外表面包括两个扁平面2110(如图8所示)，两个扁平面2110沿竖直方向相互面对，即扁平面2110与第一表面2121相互面对。电极组件211大致为六面体结构，扁平面2110大致平行于卷绕轴线且为面积最大的外表面。扁平面2110可以只是相对平整的表面，并不要求是纯平面。
如图10所示，当电极组件211为叠片式结构时，第一极片2111、隔膜2113和第二极片2112沿竖直方向层叠，即第一极片2111的表面与第一表面2121相互面对。
电极组件211在充放电过程中不可避免的会沿第一极片2111的厚度方向发生膨胀(在卷绕式结构的电极组件211中，沿垂直于扁平面2110的方向膨胀 力最大；在叠片式结构的电极组件211中，沿第一极片2111和第二极片2112的堆叠方向膨胀力最大)。
本实施例中，卷绕式结构的电极组件211的扁平面2110朝向竖直方向(Z轴所指方向)。或者，叠片式结构的电极组件211的第一极片2111和第二极片2112沿竖直方向(Z轴所指方向)层叠。可见，电极组件211无论是采用卷绕式结构还是采用叠片式结构，电极组件对电池壳体212施加最大膨胀力的方向都朝向竖直方向。
而现有技术中，电池模块的电池单体21中，电极组件对电池壳体212施加最大膨胀力的方向都是朝向水平方向，由于电池模块2在水平方向的尺寸相比于竖直方向的尺寸大的多(例如，受到车辆的底盘高度尺寸限制，需要有更多的电池单体沿水平方向堆叠，膨胀力累积大)，因此，现有电池模块在水平方向上受到的膨胀力非常大，因此需要在电池模块的水平方向两侧设置非常厚的端板以抵抗膨胀力，而端板加厚会降低电池模块的能量密度。而本实施例中，电极组件对电池壳体212施加最大膨胀力的方向是朝向竖直方向，而竖直方向上堆叠的电池单体个数较少，因此相比于现有技术，可以大大减少电池模块的最大膨胀力。
电池单体21的电极组件211都具有多个，且多个电极组件211沿着附图中Z轴方向堆叠。具体的，如图9所示，卷绕式结构21a的电极组件211，例如：电极组件211为两个。两个电极组件211的扁平面2110沿着Z轴堆叠，且将两个电机组件的第一极片2111和第二极片2112分别连接贴合，进而将两个堆叠的电机组件放置电池壳体212内，达到其扁平面2110沿着Z轴方向堆叠放置的目的。同理，如图10所示，叠片式结构21b的电极组件211，也是沿 着Z轴方向进行堆叠，而堆叠的高度则根据电池壳体212的开口的高度进行灵活的设定(如附图中Z轴方向的电池壳体的高度)，电极组件211对电池壳体212施加最大膨胀力的方向都朝向Z轴方向。
本实施例中电池模块沿水平方向(例如X轴方向)的尺寸大于电池模块沿竖直方向(例如Z轴方向)的尺寸。从而减少单体电池在竖直方向(例如Z轴方向)的堆叠数量，从而减小电池在竖直方向上的膨胀力，而在水平方向(例如X轴方向)上是为电池单体21的第二表面2122与第二表面2122的排列，因此电池模块在水平方向上的膨胀力会较小。加之，上文中电池单体21内的两种电极组件211的放置方式，也极大的降低了电池单体21在第二表面2122的膨胀力。因此，对于电池模块可以在较大程度上忽略膨胀力带来的影响，同时提高电池包的能量密度。
另外，箱体1内的电池单体21在使用后，电池单体本身会产生膨胀，使得箱体1会具有一定的形变(由内向外的膨胀变形)，因此会对缓冲构件4进行挤压，使得冷却板3与箱体1之间贴合更加紧密，而缓冲构件4由于自身的柔性则不会出现损坏的问题，从而提高冷却散热的效果。
需要说明的是，尽管在本文中已经对上述各实施例进行了描述，但并非因此限制本申请的专利保护范围。因此，基于本申请的创新理念，对本文所述实施例进行的变更和修改，或利用本申请说明书及附图内容所作的等效结构或等效流程变换，直接或间接地将以上技术方案运用在其他相关的技术领域，均包括在本申请专利的保护范围之内。

Claims (10)

  1. 一种电池包，其中，包括：
    箱体，所述箱体包括上箱盖和下箱体，所述上箱盖与所述下箱体密封设置；
    多个电池模块，容纳于所述箱体内，所述电池模块包括沿水平方向排列的多个电池单体以及与所述多个电池单体电连接的多个汇流排，所述电池单体包括电极组件和电池壳体，所述电极组件容纳于所述电池壳体内，所述电极组件包括第一极片、第二极片以及设置于所述第一极片和所述第二极片之间的隔膜；
    冷却板，位于所述电池模块的沿竖直方向的一侧；以及，
    缓冲构件，设置在所述冷却板和所述箱体之间，所述缓冲构件的弹性模量小于所述冷却板的弹性模量以及所述箱体的弹性模量；
    其中，所述电极组件为卷绕式结构且为扁平状，所述电极组件的外表面包括两个扁平面，两个所述扁平面沿所述竖直方向相互面对；或，所述电极组件为叠片式结构，所述第一极片、所述隔膜和所述第二极片沿所述竖直方向层叠。
  2. 根据权利要求1所述的电池包，其中，所述缓冲构件的两侧表面分别与所述箱体以及所述冷却板接触，所述冷却板通过所述缓冲构件固定于所述箱体。
  3. 根据权利要求1或2所述的电池包，其中，所述缓冲构件为导热结构胶，所述导热结构胶的两侧表面分别粘接于所述箱体以及所述冷却板；或，
    所述缓冲构件为导热垫，所述导热垫固定在所述冷却板和所述箱体之间。
  4. 根据权利要求1～3任意一项所述的电池包，其中，所述电池模块沿所述水平方向的尺寸大于所述电池模块沿所述竖直方向的尺寸。
  5. 根据权利要求1～4任意一项所述的电池包，其中，所述冷却板设置在所述箱体的外部。
  6. 根据权利要求1～5任意一项所述的电池包，其中，所述电池包具有两个所述冷却板，两个所述冷却板分别位于所述箱体的上方和下方。
  7. 根据权利要求1～6任意一项所述的电池包，其中，所述冷却板设置在所述箱体的内部；并且，
    所述电池模块的底面与所述箱体的内底面之间设置有导热结构胶；和/或，所述电池模块的顶面与所述箱体的内顶面之间设置有导热结构胶。
  8. 根据权利要求1～7任意一项所述的电池包，其中，所述冷却板的内部设置有流体通道，所述流体通道沿所述水平方向延伸，所述流体通道的入口与出口位于所述冷却板的沿所述水平方向的同一端。
  9. 根据权利要求1～8任意一项所述的电池包，其中，所述电池单体具有多个所述电极组件，并且多个所述电极组件沿所述竖直方向堆叠。
  10. 根据权利要求1～9任意一项所述的电池包，其中，所述缓冲构件的弹性模量为2GPa-5GPa，所述冷却板的弹性模量为50GPa-150GPa，所述箱体的弹性模量为50GPa-150GPa。
PCT/CN2019/079640 2018-12-30 2019-03-26 一种电池包 WO2020140336A1 (zh)

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