WO2024131252A1 - Batterie et véhicule - Google Patents

Batterie et véhicule Download PDF

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Publication number
WO2024131252A1
WO2024131252A1 PCT/CN2023/125582 CN2023125582W WO2024131252A1 WO 2024131252 A1 WO2024131252 A1 WO 2024131252A1 CN 2023125582 W CN2023125582 W CN 2023125582W WO 2024131252 A1 WO2024131252 A1 WO 2024131252A1
Authority
WO
WIPO (PCT)
Prior art keywords
plane
battery cell
cooling
pole
end beam
Prior art date
Application number
PCT/CN2023/125582
Other languages
English (en)
Chinese (zh)
Inventor
于林
张景升
王利冠
李勇君
牛亚琪
占莉
王玉玲
潘福中
Original Assignee
浙江极氪智能科技有限公司
威睿电动汽车技术(宁波)有限公司
浙江吉利控股集团有限公司
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 浙江极氪智能科技有限公司, 威睿电动汽车技术(宁波)有限公司, 浙江吉利控股集团有限公司 filed Critical 浙江极氪智能科技有限公司
Publication of WO2024131252A1 publication Critical patent/WO2024131252A1/fr

Links

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
    • 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
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • 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

  • the present application relates to the technical field of power batteries, and in particular to a battery pack and a vehicle.
  • CTC Cell To Chassis
  • CTC battery packs generate a lot of heat during rapid charging and rapid discharging. If the generated heat cannot be dissipated quickly and effectively, the accumulation of heat may cause safety accidents such as battery heating, fire, and explosion.
  • the CTC battery pack includes an upper cover, battery cells, cooling plates, connecting plates and a tray. Multiple battery cells are arranged between the upper cover and the tray. The battery cells are arranged along the Z direction. The battery cells are provided with poles at one end close to the upper cover in the Z direction. The connecting plates are used to connect the poles of two adjacent battery cells. The upper cover and the tray are connected by structural adhesive. Multiple cooling plates are arranged at the bottom of the multiple battery cells.
  • the upper cover of the CTC battery pack is integrated with the passenger compartment floor of the vehicle, and the upper cover of the CTC battery pack seals the passenger compartment.
  • the present application provides a battery pack and a vehicle to solve the problem of CTC battery pack under high charging rate.
  • charging there will be a problem of high temperatures of the connecting pieces and poles.
  • the present application provides a battery pack, comprising a tray, a battery cell group, a first connecting sheet, a second connecting sheet, and a plurality of cooling plates;
  • the tray comprises a bottom plate and a frame, wherein the frame is arranged on the bottom plate, and the battery cell group is accommodated in a space surrounded by the bottom plate and the frame;
  • the battery cell group includes a plurality of battery cell rows, the battery cell rows include a plurality of battery cells, the battery cell rows of the battery cell group are arranged side by side along a first direction, the battery cells of the battery cell rows are arranged sequentially along a second direction, and the battery cells are provided with a first pole and a second pole at both ends in the second direction;
  • the first connecting piece is connected between the first pole and the second pole between adjacent cells of the cell row, and the second connecting piece is connected between adjacent cell rows of the cell group;
  • a cooling plate is arranged between adjacent rows of cells in the cell group, and the cooling plate extends along the second direction.
  • the cooling plate is located on one side of the first pole, the second pole, the first connecting plate and the second connecting plate on the cell row, and the cooling plate is used to cool the first pole, the second pole, the first connecting plate and the second connecting plate.
  • it also includes an upper cover plate, the upper cover plate and the tray are respectively connected to the battery cell group, the side of the battery cell group connected to the upper cover plate in the third direction is a plane, and the upper cover plate is fixedly connected to the plane of the battery cell group and the tray respectively by structural adhesive.
  • the battery cell includes a square battery cell body, the battery cell body having a first plane, a second plane, a third plane, a fourth plane, a fifth plane and a sixth plane, the first plane and the second plane are relatively parallel to each other in the first direction, the third plane and the fourth plane are vertically arranged between the first plane and the second plane, the fifth plane and the sixth plane are vertically arranged between the first plane and the second plane, the third plane and the fourth plane are relatively parallel to each other in the second direction, and the fifth plane and the sixth plane are relatively parallel to each other in the third direction;
  • the side of the battery body connected to the upper cover plate in the third direction is the fifth plane, the first pole is arranged on the third plane, and the second pole is arranged on the fourth plane;
  • the first plane and the second plane of the adjacent battery cells are respectively in contact with the cooling plate.
  • the space between the first pole and the cooling plate, the space between the second pole and the cooling plate, the space between the first pole and the cooling plate, and the space between the second pole and the cooling plate A first heat conducting component is disposed between them.
  • the first connecting sheet includes a first connecting body and a second connecting body, the first connecting body is connected to the first poles between adjacent battery cells in the battery cell row by welding, and the second connecting body is connected to the second poles between adjacent battery cells in the battery cell row by welding; the first connecting body and the second connecting body enclose a quadrilateral cavity or a hexagonal cavity.
  • the second connecting piece is provided with a first cooling wall, a first welding wall, a U-shaped wall, a second welding wall and a second cooling wall;
  • the first cooling wall is vertically connected to the first welding wall
  • the second cooling wall is vertically connected to the second welding wall
  • the first cooling wall and the second cooling wall are arranged in parallel
  • the U-shaped wall is connected between the first welding wall and the second welding wall
  • the first welding wall is connected to the first pole at one end of the adjacent battery cell row in the second direction by welding, and the second welding wall is connected to the second pole at one end of the adjacent battery cell row in the second direction by welding;
  • the cooling plate has a first end and a second end in the second direction, a second heat conducting component is disposed between the first end and the first cooling wall and between the first end and the second cooling wall, and a third heat conducting component is disposed between the second end and the U-shaped wall.
  • the cooling plate has a cooling channel
  • the frame has a liquid inlet cavity and a confluence cavity
  • a plurality of liquid inlet branches are arranged between the liquid inlet cavity and one end of the cooling channels of the plurality of cooling plates
  • a plurality of liquid return branches are arranged between the confluence cavity and the other end of the cooling channels of the plurality of cooling plates
  • the frame is provided with a liquid inlet joint and a liquid outlet joint, the liquid inlet joint is communicated with the liquid inlet cavity, and the liquid outlet joint is communicated with the confluence cavity.
  • a BDU is further included, wherein the BDU includes a BDU body and a connection plug-in, wherein the BDU body is detachably fixed to the outside of the frame, and the connection plug-in is fixed to the inside of the frame;
  • the BDU body is provided with electrical vulnerable components, and the connection plug-in is provided with three pins, and the three pins pass through the frame and are connected to the BDU body.
  • the frame includes a frame body and a baffle plate, the frame body is provided with a left end beam and a right end beam in the second direction, the frame body is provided with a front end beam and a rear end beam in the first direction, the left end beam, the right end beam, the front end beam and the rear end beam are vertically connected in sequence, and the baffle plate is arranged around the outer sides of the left end beam, the right end beam and the front end beam;
  • the BDU body is fixed on the outside of the rear end beam, the connecting plug is fixed on the inside of the rear end beam, and the liquid inlet joint and the liquid outlet joint are arranged on the outside of the front end beam;
  • the rear end beam is provided with a communication cavity, and the communication cavity is connected with the liquid inlet cavity and the confluence cavity.
  • the present application provides a vehicle comprising the battery pack as described above.
  • the present application provides a battery pack and a vehicle, wherein a battery cell group includes a plurality of battery cell rows, and the battery cell rows include a plurality of battery cells.
  • the battery cell rows of the battery cell group are arranged side by side along a first direction, and the battery cells of the battery cell rows are arranged sequentially along a second direction.
  • First poles and second poles are arranged at both ends of the battery cells in the second direction.
  • a cooling plate is arranged between adjacent battery cell rows of the battery cell group, and the cooling plate extends along the second direction. The cooling plate is located on one side of the first pole, the second pole, the first connecting plate, and the second connecting plate on the battery cell row.
  • the first pole, the second pole, the first connecting plate, and the second connecting plate are cooled by the cooling plate, thereby avoiding the problem of high temperatures of the first pole, the second pole, the first connecting plate, and the second connecting plate, thereby enabling the battery pack to be charged at a higher charging rate.
  • FIG1 is a structural schematic diagram 1 of a battery pack provided in an embodiment of the present application.
  • FIG2 is a second schematic diagram of the battery pack in FIG1 ;
  • FIG3 is a schematic diagram of an explosion of the battery pack in FIG1 ;
  • FIG4 is a schematic diagram of the structure of the battery cell group in FIG3 ;
  • FIG5 is a structural schematic diagram 1 of a battery cell provided in an embodiment of the present application.
  • FIG6 is a second schematic diagram of the battery cell in FIG5 ;
  • FIG. 7 is a schematic diagram of a connection between adjacent cells in the cell row in FIG. 4 ;
  • FIG8 is a second schematic diagram of connection of adjacent cells in FIG7 :
  • FIG9 is another schematic diagram of connecting adjacent cells in the cell row in FIG4 ;
  • FIG10 is another schematic diagram of connecting adjacent cells in the cell row in FIG4 ;
  • FIG11 is a second schematic diagram of connection of adjacent cells in FIG10 :
  • FIG12 is a schematic diagram of connecting adjacent battery cell rows in FIG4 ;
  • FIG13 is a schematic structural diagram of the second connecting piece in FIG12;
  • FIG14 is a partial explosion schematic diagram of FIG3
  • FIG15 is a partial schematic diagram of the tray in FIG14;
  • Fig. 16 is a schematic cross-sectional view taken along line A-A in Fig. 15;
  • FIG. 17 is a schematic structural diagram of the cooling plate in FIG. 3 .
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.
  • Features defined as “first” or “second” may include at least one of the features explicitly or implicitly.
  • “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
  • the terms “installation”, “connection”, “fixation” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • installation e.g., connection, “fixation” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • connection connection
  • fixing and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or
  • a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.
  • a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
  • the CTC battery pack includes an upper cover, battery cells, a cooling plate, a connecting piece and a tray.
  • a plurality of battery cells are arranged between the upper cover and the tray.
  • the battery cells are arranged along the Z direction.
  • a pole is arranged at one end of the battery cell close to the upper cover in the Z direction.
  • the connecting piece is used to connect the poles of two adjacent battery cells.
  • the upper cover and the tray are connected by structural adhesive.
  • a plurality of cooling plates are arranged at the bottom of the plurality of battery cells.
  • the upper cover of the CTC battery pack is integrated with the floor of the passenger compartment of the vehicle.
  • the upper cover of the CTC battery pack seals the passenger compartment.
  • the poles and connecting pieces of the battery cells are located at the top of the battery cells, and the poles and connecting pieces of the battery cells are away from the cooling plate.
  • the CTC battery pack is charged at a higher charging rate, the poles and connecting pieces of the battery cells
  • the temperature of the plate rises sharply, and the cooling plate at the bottom of the battery cell cannot effectively cool down the pole and the connecting plate, so the temperature of the connecting plate and the pole is high.
  • a battery cell group includes a plurality of battery cell rows, and the battery cell rows include a plurality of battery cells.
  • the battery cell rows of the battery cell group are arranged side by side along a first direction, and the battery cells of the battery cell rows are arranged in sequence along a second direction.
  • the battery cells are arranged with a first pole and a second pole at both ends of the battery cells in the second direction.
  • the battery cells are no longer arranged along the Z direction, but are arranged along a direction perpendicular to the Z direction, that is, arranged along the second direction.
  • a cooling plate is arranged between adjacent battery cell rows of the battery cell group, and the cooling plate extends along the second direction.
  • the cooling plate is located on one side of the first pole, the second pole, the first connecting plate and the second connecting plate on the battery cell row.
  • the cooling plate can not only cool the battery cell body, but also cool the first pole, the second pole, the first connecting plate and the second connecting plate, thereby avoiding the problem of high temperatures of the first pole, the second pole, the first connecting plate and the second connecting plate, and thus enabling the battery pack to be charged at a higher charging rate.
  • the Z direction refers to the direction in which the tray points to the upper cover plate, which is the third direction of the present application.
  • Figure 1 is a schematic diagram of the structure of a battery pack provided in an embodiment of the present application
  • Figure 2 is a schematic diagram of the battery pack in Figure 1
  • Figure 3 is an exploded schematic diagram of the battery pack in Figure 1
  • Figure 4 is a schematic diagram of the structure of the battery cell group in Figure 3, and the arrow in Figure 3 represents the flow direction of the coolant
  • Figure 5 is a schematic diagram of the structure of a battery cell provided in an embodiment of the present application
  • Figure 6 is a schematic diagram of the battery cell in Figure 5
  • Figure 7 is a schematic diagram of connection of adjacent battery cells in the battery cell row in Figure 4
  • Figure 8 is a schematic diagram of connection of electrically adjacent battery cells in Figure 7
  • Figure 9 is another schematic diagram of connection of adjacent battery cells in the battery cell row in Figure 4
  • Figure 10 is another schematic diagram of connection of adjacent battery cells in the battery cell row in Figure 4
  • Figure 11 is a schematic diagram of connection of electrically adjacent battery cells in Figure 10
  • Figure 12 is a schematic diagram of connection of adjacent battery cell
  • an embodiment of the present application provides a battery pack, including an upper cover plate 10, a battery cell group 20, a first connecting plate 31, a second connecting plate 32, a tray 40, and a plurality of cooling plates 50.
  • the upper cover plate 10 and the tray 40 are respectively connected to the battery cell group 20 in the third direction Z, the tray 40 includes a bottom plate 41 and a frame 42, the frame 42 is arranged on the bottom plate 41, and the battery cell group 20 is accommodated in a space enclosed by the bottom plate 41 and the frame 42.
  • the battery cell group 20 includes a plurality of battery cell rows 21.
  • the cell rows 21 of the cell group 20 are arranged side by side along the first direction X, the cells 211 of the cell row 21 are arranged in sequence along the second direction Y, and the first poles 2111 and the second poles 2112 are arranged at both ends of the cell 211 in the second direction Y.
  • the first direction X is perpendicular to the second direction Y
  • the third direction Z is perpendicular to the first direction X and the second direction Y.
  • the first direction X may be the front-rear direction of the vehicle body when the battery pack is installed in the vehicle body
  • the second direction Y may be the left-right direction of the vehicle body when the battery pack is installed in the vehicle body
  • the third direction Z may be the up-down direction of the vehicle body when the battery pack is installed in the vehicle body.
  • a first connecting piece 31 is connected between the first pole 2111 and the second pole 2112 between adjacent cells 211 of the cell row 21
  • a second connecting piece 32 is connected between adjacent cell rows 21 of the cell group 20 .
  • the battery cells 211 of the battery cell row 21 extend along the second direction Y, in the second direction Y, the first pole 2111 and the second pole 2112 between adjacent battery cells 211 are arranged correspondingly, and the first pole 2111 and the second pole 2112 between adjacent battery cells 211 are electrically connected through the first connecting piece 31, so that the battery cells 211 of the battery cell row 21 can be connected in series; since the battery cell rows 21 of the battery cell group 20 are arranged side by side in the first direction X, the first pole 2111 of one of the two battery cells 211 at the same end of the adjacent battery cell row 21 in the second direction Y is arranged correspondingly to the second pole 2112 of the other battery cell 211, and the first pole 2111 of one of the two battery cells 211 at the same end is electrically connected to the second pole 2112 of the other battery cell 211 through the second connecting piece 32, so that the battery cell rows 21 of the battery cell group 20 can be connected in series.
  • the battery cell 211 may be a ternary lithium battery cell. In other embodiments, the battery cell 211 may also be a battery cell made of other materials.
  • a cooling plate 50 is disposed between adjacent cell rows 21 of the cell group 20 , and the cooling plate 50 extends along the second direction Y.
  • the cooling plate 50 is located on one side of the first pole 2111 , the second pole 2112 , the first connecting piece 31 , and the second connecting piece 32 on the cell row 21 .
  • the cooling plate 50 can be directly attached to the first pole 2111 on the battery cell row 21, or indirectly attached via a heat-conducting component.
  • the cooling plate 50 can be directly attached to the second pole 2112 on the battery cell row 21, or indirectly attached via a heat-conducting component.
  • the cooling plate 50 can be directly attached to the first connecting piece 31 on the battery cell row 21, or indirectly attached via a heat-conducting component.
  • the cooling plate 50 can be directly attached to the second connecting piece 32 on the battery cell row 21, or indirectly attached via a heat-conducting component. Heat-conducting components are bonded indirectly.
  • the battery cell 211 also includes a battery cell body, which is directly attached to the cooling plate 50.
  • the cooling plate 50 can not only cool the battery cell body, but also cool the first pole 2111, the second pole 2112, the first connecting piece 31 and the second connecting piece 32, thereby avoiding the problem of high temperatures of the first pole 2111, the second pole 2112, the first connecting piece 31 and the second connecting piece 32, and further allowing the battery pack to be charged at a higher charging rate.
  • the side of the battery cell group 20 connected to the upper cover plate 10 in the third direction Z is a plane, and the upper cover plate 10 is fixedly connected to the plane of the battery cell group 20 and the tray 40 respectively by structural adhesive.
  • the upper cover plate 10 can be integrated with the passenger compartment floor of the vehicle, that is, the upper cover plate 10 and the passenger compartment floor of the vehicle are the same component.
  • the upper cover plate 10 can be regarded as the passenger compartment floor of the vehicle, and the passenger compartment floor of the vehicle can be the upper cover plate 10.
  • the upper cover plate 10 is not only fixedly connected to the tray 40 in the third direction Z by structural adhesive, but also fixedly connected to the plane of the battery cell group 20, which improves the connection strength between the upper cover plate 10 and other parts of the battery pack, making it difficult for the upper cover plate 10 and other parts of the battery pack to separate in the third direction Z, thereby improving the safety of the passengers.
  • the battery cell 211 includes a square battery cell body, the battery cell body having a first plane 2113, a second plane 2114, a third plane 2115, a fourth plane 2116, a fifth plane 2117 and a sixth plane 2118, the first plane 2113 and the second plane 2114 are relatively parallel to each other in the first direction X, the third plane 2115 and the fourth plane 2116 are vertically arranged between the first plane 2113 and the second plane 2114, the fifth plane 2117 and the sixth plane 2118 are vertically arranged between the first plane 2113 and the second plane 2114, the third plane 2115 and the fourth plane 2116 are relatively parallel to each other in the second direction Y, and the fifth plane 2117 and the sixth plane 2118 are relatively parallel to each other in the third direction Z.
  • the side of the battery body connected to the upper cover plate 10 in the third direction Z is a fifth plane 2117
  • the first pole 2111 is arranged on the third plane 2115
  • the second pole 2112 is arranged on the fourth plane 2116.
  • the fifth plane 2117 of the battery cell body is fixedly connected to the upper cover plate 10 by means of structural adhesive.
  • the plane formed by the fifth planes 2117 of the square battery cell bodies of all the battery cells 211 of the battery cell group 20 is fixedly connected to the upper cover plate 10 by means of structural adhesive.
  • the first plane 2113 and the second plane 2113 of the adjacent battery cells 211 of the battery cell group 20 are The surfaces 2114 are respectively in contact with the cooling plates 50 .
  • first plane 2113 and the second plane 2114 have the same area, and the first plane 2113 and the second plane 2114 are the surfaces with the largest areas of the battery cell 211 .
  • an explosion-proof valve 2119 is provided on one side of the battery cell 211 connected to the bottom plate 41 in the third direction Z; a smoke exhaust channel is provided inside the bottom plate 41 and the frame 42 , and a pressure relief valve 4442 is also provided on the frame 42 .
  • the explosion-proof valve 2119 can cut off the current circuit when the internal pressure in the battery cell 211 is high.
  • the explosion-proof valve 2119 can also be destroyed when the internal pressure in the battery cell 211 is high, thereby releasing the pressure inside the battery cell 211.
  • Fig. 14 is a partial exploded schematic diagram of Fig. 3.
  • the frame 42 includes a frame body, the frame body is provided with a left end beam 441 and a right end beam 442 in the second direction Y, the frame body is provided with a front end beam 443 and a rear end beam 444 in the first direction X, the left end beam 441, the right end beam 442, the front end beam 443 and the rear end beam 444 are vertically connected in sequence, and the pressure relief valve 4442 is provided on the rear end beam 444.
  • the harmful substances can be directly sprayed into the exhaust channel inside the bottom plate 41 and the frame 42, and discharged from the battery pack through the pressure relief valve 422, avoiding the harmful substances from being sprayed directly toward the passenger compartment, and effectively reducing the spread speed of heat diffusion, thereby improving the safety performance of the battery pack. It should be noted that when the battery pack has thermal runaway, the harmful substances can first pass through the exhaust channel inside the bottom plate 41, then pass through the exhaust channel inside the frame 42, and finally be discharged from the battery pack through the pressure relief valve 422.
  • a first heat-conducting component 51 is provided between the first pole 2111 and the cooling plate 50, between the second pole 2112 and the cooling plate 50, between the first connecting piece 31 and the cooling plate 50, and between the second connecting piece 32 and the cooling plate 50.
  • the cooling plate 50 is respectively attached to the first pole 2111, the second pole 2112, the first connecting piece 31, and the second connecting piece 32 of the battery cell row 21 through the first heat-conducting component 51, and cools the first pole 2111, the second pole 2112, the first connecting piece 31, and the second connecting piece 32.
  • the first heat-conducting component 51 may be a heat-conducting glue or a heat-conducting sheet.
  • the first connecting sheet 31 includes a first connecting body 311 and a second connecting body 312, the first connecting body 311 is connected to the first pole 2111 between adjacent cells 211 of the cell row 21 by welding, and the second connecting body 312 is connected to the second pole 2112 between adjacent cells 211 of the cell row 21 by welding.
  • the shape of the first connection body 311 and the shape of the second connection body 312 may be the same or different, and no specific setting is made here. In this embodiment, the shape of the first connection body 311 and the shape of the second connection body 312 are the same.
  • the first connection body 311 and the second connection body 312 may be formed by stamping.
  • the first connection body 311 and the second connection body 312 each include a first connection wall 3101, a second connection wall 3102, and a third connection wall 3103.
  • the first connection wall 3101 is vertically connected to the second connection wall 3102
  • the third connection wall 3103 is vertically connected to the second connection wall 3102
  • the first connection wall 3101 and the third connection wall 3103 are arranged in parallel, and in a direction perpendicular to the second connection wall 3102, the length of the first connection wall 3101 is greater than the length of the third connection wall 3103.
  • the second connection wall 3102 of the first connection body 311 is connected to the first pole 2111 by welding, and the second connection wall 3102 of the second connection body 312 is connected to the second pole 2112 by welding;
  • the first connection wall 3101 of the first connection body 311 and the third connection wall 3103 of the second connection body 312 are located in different planes, and the side of the first connection wall 3101 of the first connection body 311 is connected to the side of the third connection wall 3103 of the second connection body 312 by welding;
  • the third connection wall 3103 of the first connection body 311 and the first connection wall 3101 of the second connection body 312 are located in different planes, and the side of the third connection wall 3103 of the first connection body 311 is connected to the side of the first connection wall 3101 of the second connection body 312 by welding.
  • the first connection body 311 and the second connection body 312 surround a quadrilateral cavity.
  • the first connection body 311 and the second connection body 312 both include a first connection wall 3101, a second connection wall 3102, and a third connection wall 3103.
  • the first connection wall 3101 is vertically connected to the second connection wall 3102
  • the third connection wall 3103 is vertically connected to the second connection wall 3102
  • the first connection wall 3101 and the third connection wall 3103 are arranged in parallel, and in a direction perpendicular to the second connection wall 3102, the length of the first connection wall 3101 is greater than the length of the third connection wall 3103.
  • the second connection wall 3102 of the first connection body 311 is connected to the first pole 2111 by welding, and the second connection wall 3102 of the second connection body 312 is connected to the second pole 2112 by welding;
  • the first connection wall 3101 of the first connection body 311 and the third connection wall 3103 of the second connection body 312 are located in the same plane, and the first connection wall 3101 of the first connection body 311 and the third connection wall 3103 of the second connection body 312 are connected by welding after being butted;
  • the third connection wall 3103 of the first connection body 311 and the first connection wall 3101 of the second connection body 312 are located in the same plane, and the third connection wall 3103 of the first connection body 311 and the first connection wall 3101 of the second connection body 312 are connected by welding after being butted.
  • 312 encloses a quadrilateral cavity.
  • first connection body 311 and the second connection body 312 each include a first connection wall 3101, a second connection wall 3102, a third connection wall 3103, a fourth connection wall 3104, and a fifth connection wall 3105.
  • the first connection wall 3101 is obliquely connected to the second connection wall 3102
  • the second connection wall 3102 is obliquely connected to the third connection wall 3103
  • the third connection wall 3103 is obliquely connected to the fourth connection wall 3104
  • the fourth connection wall 3104 is obliquely connected to the fifth connection wall 3105
  • the first connection wall 3101 and the third connection wall 3103 are arranged in parallel
  • the first connection wall 3101 and the third connection wall 3103 are located in different planes
  • the first connection wall 3101 and the fifth connection wall 3105 are arranged in parallel
  • the first connection wall 3101 and the fifth connection wall 3105 are located in the same plane.
  • the third connection wall 3103 of the first connection body 311 is connected to the first pole 2111 by welding, and the third connection wall 3103 of the second connection body 312 is connected to the second pole 2112 by welding; the first connection wall 3101 of the first connection body 311 is connected to the first connection wall 3101 of the second connection body 312 by laser welding after being attached; the fifth connection wall 3105 of the first connection body 311 is connected to the fifth connection wall 3105 of the second connection body 312 by welding after being attached.
  • the first connection body 311 and the second connection body 312 enclose a hexagonal cavity.
  • the second connecting plate 32 is provided with a first cooling wall 321, a first welding wall 322, a U-shaped wall 323, a second welding wall 324 and a second cooling wall 325; the first cooling wall 321 is vertically connected to the first welding wall 322, the second cooling wall 325 is vertically connected to the second welding wall 324, the first cooling wall 321 and the second cooling wall 325 are arranged in parallel, and the U-shaped wall 323 is connected between the first welding wall 322 and the second welding wall 324.
  • the second connecting piece 32 can be formed by stamping.
  • the first welding wall 322 is connected to the first pole 2111 at one end of the adjacent battery cell row 21 in the second direction Y by welding
  • the second welding wall 324 is connected to the second pole 2112 at one end of the adjacent battery cell row 21 in the second direction Y by welding. It should be noted that the first pole 2111 and the second pole 2112 at the same end of the adjacent battery cell row 21 in the second direction Y are respectively connected to the second connecting piece 32 by welding.
  • the cooling plate 50 has a first end 501 and a second end 502 in the first direction X.
  • a second heat conducting component 52 is disposed between the first end 501 and the first cooling wall 321 and between the first end 501 and the second cooling wall 325 .
  • a third heat conducting component 53 is disposed between the second end 502 and the U-shaped wall 323 .
  • the second heat conducting component 52 may be a heat conducting glue or a heat conducting sheet.
  • the third heat conducting component 53 may be a heat conducting glue or a heat conducting sheet.
  • Figure 15 is a partial schematic diagram of the tray in Figure 14;
  • Figure 16 is a schematic diagram of the A-A section in Figure 15; and
  • Figure 17 is a structural schematic diagram of the cooling plate in Figure 3.
  • the cooling plate 50 has a cooling channel 504, the frame 42 has a liquid inlet cavity 431 and a confluence cavity 432, a plurality of liquid inlet branches 435 are arranged between the liquid inlet cavity 431 and one end of the cooling channels 504 of the plurality of cooling plates 50, and a plurality of liquid return branches 436 are arranged between the confluence cavity 432 and the other end of the cooling channels 504 of the plurality of cooling plates 50.
  • the frame 42 is provided with a liquid inlet joint 433 and a liquid outlet joint 434 .
  • the liquid inlet joint 433 is communicated with the liquid inlet cavity 431
  • the liquid outlet joint 434 is communicated with the confluence cavity 432 .
  • the cooling plate 50 is provided with at least one cooling channel 504.
  • the cooling plate 50 is provided with a plurality of cooling channels 504, and the plurality of cooling channels 504 extend along the second direction Y, and each cooling plate 50 corresponds to a liquid inlet branch 435 and a liquid return branch 436.
  • the cooling channel 504 passes through both ends of the cooling plate 50 in the extension direction of the cooling plate 50.
  • the liquid inlet branch pipe 435 and the liquid return branch pipe 436 are located at both ends of the cooling channel 504.
  • the frame 42 includes a frame body and a baffle plate 43.
  • the frame body is provided with a left end beam 441 and a right end beam 442 in the second direction Y, and the frame body is provided with a front end beam 443 and a rear end beam 444 in the first direction X.
  • the left end beam 441, the right end beam 442, the front end beam 443 and the rear end beam 444 are vertically connected in sequence.
  • the liquid inlet joint 433 and the liquid outlet joint 434 are arranged on the outside of the front end beam 443, the right end beam 442 is provided with a first through hole 4211 for the liquid inlet branch pipe 435 to pass through, and the left end beam 441 is provided with a second through hole 4212 for the liquid return branch pipe 436 to pass through.
  • the baffle plate 43 is disposed outside the left end beam 441, the right end beam 442 and the front end beam 443, and the baffle plate 43 and the left end beam 441 can be connected by welding or bonding.
  • the connection method between the baffle plate 43 and the right end beam 442 is the same as the connection method between the baffle plate 43 and the left end beam 441, and the connection method between the baffle plate 43 and the front end beam 443 is the same as the connection method between the baffle plate 43 and the front end beam 443.
  • Sealant or sealing ring is provided between the liquid inlet branch 435 and the right end beam 442, and between the liquid return branch 436 and the left end beam 441. Specifically, sealant or sealing ring is provided between the liquid inlet branch 435 and the plane of the end of the right end beam 442 away from the cooling plate 50, and between the liquid return branch 436 and the plane of the end of the left end beam 441 away from the cooling plate 50. Such a configuration can improve the sealing of the entire battery pack.
  • the cooling plate 50 has an end plane 503
  • the liquid inlet branch pipe 435 passes through the right end beam 442 and abuts against the end plane 503
  • the liquid return branch pipe 436 passes through the left end beam 441 and abuts against the end plane 503
  • a sealant is provided between the liquid inlet branch pipe 435 and the end plane 503, and between the liquid return branch pipe 436 and the end plane 503.
  • Such a configuration can improve the sealing between the liquid inlet branch pipe 435 and the end plane 503, and between the liquid return branch pipe 436 and the end plane 503, thereby avoiding leakage between the liquid inlet branch pipe 435 and the cooling plate 50, and between the liquid return branch pipe 436 and the cooling plate 50. It should be noted that in this embodiment, both ends of the cooling plate 50 have end planes 503.
  • Coolant flow process the coolant first enters the liquid inlet cavity 431 from the liquid inlet joint 433, and then flows into each liquid inlet branch pipe 435 through the liquid inlet cavity 431.
  • the coolant in each liquid inlet branch pipe 435 is transported through the cooling channel 504 of the corresponding cooling plate 50, and then flows back to the return liquid branch pipe 436 through the cooling channel 504.
  • the coolant in each return liquid branch pipe 436 converges in the confluence cavity 432, and the coolant in the confluence cavity 432 flows out through the liquid outlet joint 434.
  • the battery also includes a battery disconnect unit (Battery Disconnect Unit, BDU) 60
  • BDU Battery Disconnect Unit
  • the BDU 60 includes a BDU body 61 and a connecting plug-in 62.
  • the BDU body 61 is detachably fixed on the outside of the frame 42
  • the connecting plug-in 62 is fixed on the inside of the frame 42.
  • electrical vulnerable components are arranged in the BDU body 61.
  • the BDU body 61 and the frame 42 can be fixed by bonding or bolts, which is not set here.
  • Electrical vulnerable components include easily damaged electrical components such as relays, fuses, sensors, etc.
  • connection plug 62 There are no electrical vulnerable components in the connection plug 62, but some electrical components that are not easily damaged can be arranged in the connection plug 62.
  • the connection plug 62 and the frame 42 can be fixed by bonding or bolts, which is not set here.
  • connection plug 62 is used to connect the battery cell group 20 and the BDU body 61.
  • the connection plug 62 is provided with three pins 621, and the three pins 621 pass through the frame 42 and are connected to the BDU body 61.
  • the three pins 621 are electrically connected and communicated with the BDU body 61. Specifically, two pins 621 are electrically connected to the BDU body 61, and one pin 621 is communicated with the BDU body 61.
  • the frame 42 includes a frame body and a baffle plate 43.
  • the main body is provided with a left end beam 441 and a right end beam 442 in the second direction Y, and the frame main body is provided with a front end beam 443 and a rear end beam 444 in the first direction X.
  • the left end beam 441, the right end beam 442, the front end beam 443 and the rear end beam 444 are vertically connected in sequence, and the baffle plate 43 is arranged on the outside of the left end beam 441, the right end beam 442 and the front end beam 443.
  • the BDU main body 61 is located on the outside of the rear end beam 444, and the BDU main body 61 is fixedly connected to the rear end beam 444, and the connecting plug 62 is fixed on the inside of the rear end beam 444. It should be noted that the inside of the rear end beam 444 refers to the inside of the battery pack, and the outside of the rear end beam 444 refers to the outside of the battery pack.
  • the part of the liquid inlet cavity 431 located in the front end beam 443 is not connected to the part of the confluence cavity 432 located in the front end beam 443.
  • the rear end beam 444 is provided with a connecting cavity 437, and the connecting cavity 437 connects the liquid inlet cavity 431 and the confluence cavity 432.
  • the cooling liquid in the connecting cavity 437 can cool the BDU body 61 and the connecting plug 62.
  • the portion of the frame 42 located at the rear end beam 444 is provided with an insulating hole 4441 for the pin 621 to pass through.
  • the pin 621 can pass through the insulating hole 4441 and then be connected to the BDU body 61.
  • the insulating hole 4441 is a hole that has been subjected to insulation treatment.
  • the shape of the insulating hole 4441 can be circular or in other shapes.
  • the insulating hole 4441 is not connected to the confluence cavity 432 .
  • a sealant is provided between the BDU body 61 and the rear end beam 444.
  • a sealant is provided between the contact surfaces of the BDU body 61 and the rear end beam 444. This arrangement can improve the sealing of the entire battery pack.
  • An embodiment of the present application provides a vehicle, including a battery pack.
  • the battery pack in this embodiment has the same structure as the battery pack provided in any of the above embodiments, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above embodiments.

Landscapes

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

Abstract

Sont prévus une batterie et un véhicule, qui se rapportent au domaine technique des batteries de traction. La batterie comprend : un plateau, un groupe d'éléments de batterie, de premières pièces de raccordement, de secondes pièces de raccordement et une pluralité de plaques de refroidissement, le plateau comprenant une plaque de base et un cadre, et le cadre étant disposé sur la plaque de base ; et le groupe d'éléments de batterie étant logé dans un espace défini par la plaque de base et le cadre. Le groupe d'éléments de batterie comprend : une pluralité de rangées d'éléments de batterie, chaque rangée d'éléments de batterie comprenant une pluralité d'éléments de batterie ; les rangées d'éléments de batterie du groupe d'éléments de batterie sont disposées côte à côte dans une première direction ; les éléments de batterie dans chaque rangée d'éléments de batterie sont agencés séquentiellement dans une seconde direction, et un premier montant de borne et un second montant de borne sont respectivement disposés aux deux extrémités de chaque élément de batterie dans la seconde direction ; et une plaque de refroidissement est disposée entre des rangées d'éléments de batterie adjacentes du groupe d'éléments de batterie. Les premiers montants de borne, les seconds montants de borne, les premières pièces de raccordement et les secondes pièces de raccordement sont refroidis au moyen des plaques de refroidissement, de sorte que le problème de température élevée des premiers montants de borne, des seconds montants de borne, des premières pièces de raccordement et des secondes pièces de raccordement peut être évité, et ainsi la batterie peut être chargée à une vitesse de charge élevée. Le véhicule comprend une batterie.
PCT/CN2023/125582 2022-12-23 2023-10-20 Batterie et véhicule WO2024131252A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211666692.4 2022-12-23
CN202211666692.4A CN115832594A (zh) 2022-12-23 2022-12-23 电池包及车辆

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WO2024131252A1 true WO2024131252A1 (fr) 2024-06-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115832594A (zh) * 2022-12-23 2023-03-21 浙江极氪智能科技有限公司 电池包及车辆

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170014924A (ko) * 2015-07-31 2017-02-08 주식회사 엘지화학 간접 냉각 방식의 배터리 모듈
CN215911500U (zh) * 2021-09-28 2022-02-25 蜂巢能源科技有限公司 电池模组和电池包
CN216980676U (zh) * 2021-12-06 2022-07-15 北京车和家汽车科技有限公司 电池模组、电池包及车辆
CN115832594A (zh) * 2022-12-23 2023-03-21 浙江极氪智能科技有限公司 电池包及车辆

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170014924A (ko) * 2015-07-31 2017-02-08 주식회사 엘지화학 간접 냉각 방식의 배터리 모듈
CN215911500U (zh) * 2021-09-28 2022-02-25 蜂巢能源科技有限公司 电池模组和电池包
CN216980676U (zh) * 2021-12-06 2022-07-15 北京车和家汽车科技有限公司 电池模组、电池包及车辆
CN115832594A (zh) * 2022-12-23 2023-03-21 浙江极氪智能科技有限公司 电池包及车辆

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