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
  • H01M10/653—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
  • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/65—Means for temperature control structurally associated with the cells
  • H01M10/655—Solid structures for heat exchange or heat conduction
  • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/65—Means for temperature control structurally associated with the cells
  • H01M10/655—Solid structures for heat exchange or heat conduction
  • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
  • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the 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
  • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
  • H01M10/6567—Liquids
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/65—Means for temperature control structurally associated with the cells
  • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
  • H01M10/6567—Liquids
  • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
• • 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
  • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
• • 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
  • H01M50/249—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
  • H01M50/258—Modular batteries; Casings provided with means for assembling
• • 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
  • H01M50/30—Arrangements for facilitating escape of gases
  • H01M50/317—Re-sealable arrangements
• • 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
  • H01M50/30—Arrangements for facilitating escape of gases
  • H01M50/342—Non-re-sealable arrangements
• • 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
  • H01M50/30—Arrangements for facilitating escape of gases
  • H01M50/342—Non-re-sealable arrangements
  • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
• • H—ELECTRICITY
  • 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
  • H01M2220/00—Batteries for particular applications
  • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
• • 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 field of battery technology, and in particular to a battery module and a battery pack.
• power batteries are the energy center of electric vehicles. With the increasing application of power battery technology, the market has higher requirements for the range and safety of power batteries.
• the commonly used power battery PACK grouping technology in the industry is the module-free battery (Cell To Pack CTP) technology, that is, the CTP technology is adopted, which does not require the use of end plates, side plates or straps and other structures, thereby reducing costs and improving product cost performance.
• the power battery will generate more heat during the charging and dissipating process.
• the relevant technology requires an additional liquid cooling plate to be installed on the battery cell tray to dissipate the heat of the battery module, which makes the battery system design complex and the cost high.
• the embodiments of the present application provide a battery module and a battery pack to solve or at least partially solve the deficiencies of the above-mentioned background technology.
• An embodiment of the present application provides a battery module, comprising:
• a cell assembly comprising a plurality of cell subgroups, wherein the plurality of cell subgroups are spaced apart along a first direction, the cell subgroups comprising a plurality of cells, and in any of the cell subgroups, the plurality of cells are spaced apart along a second direction;
• the tray comprises a plurality of battery cell accommodating grooves arranged at intervals along the first direction, wherein one battery cell accommodating groove is arranged corresponding to one battery cell subgroup, and a cooling liquid flow channel is arranged in a side wall of the battery cell accommodating groove.
• An embodiment of the present application provides a battery pack, comprising:
• a box body comprising a bottom plate and a plurality of side beams, wherein the plurality of side beams are fixedly arranged on the edges of the bottom plate to enclose and form a receiving cavity;
• a plurality of battery cell modules are located in the accommodating cavity, the plurality of battery cell modules are spaced apart along the first direction, the battery cell modules include a plurality of battery modules spaced apart along the second direction, and the battery modules include any of the battery modules described above.
• the embodiments of the present application provide a battery module and a battery pack, the battery module comprising a battery cell assembly and a tray, the battery cell assembly comprising a plurality of battery cell groups, the plurality of battery cell groups being spaced apart along a first direction, the battery cell group comprising a plurality of battery cells, the plurality of battery cells being spaced apart along a second direction, the tray comprising a plurality of battery cell accommodating grooves spaced apart along the first direction, one battery cell accommodating groove being arranged corresponding to one battery cell subgroup, a cooling liquid flow channel being arranged in the side wall of the battery cell accommodating groove; by arranging a cooling liquid flow channel in the side wall of the battery cell accommodating groove, the cooling liquid flow channel and the tray are integrated into one, without the need to additionally arrange a liquid cooling plate, the structure is more streamlined, the space utilization rate of the battery module can be effectively improved, and the manufacturing cost of the battery module can be reduced.
• FIG1 is a schematic diagram of the structure of a battery module provided in an embodiment of the present application.
• FIG2 is an exploded view of a battery module provided in an embodiment of the present application.
• FIG3 is a schematic cross-sectional view of FIG1A-A′
• FIG4 is a top view of a liquid cooling assembly provided in an embodiment of the present application.
• FIG5 is a cross-sectional schematic diagram of a cooling plate provided in an embodiment of the present application.
• FIG6 is a schematic diagram of the structure of a battery pack provided in an embodiment of the present application.
• FIG7 is a cross-sectional top view of a battery pack provided in an embodiment of the present application.
• FIG8 is a cross-sectional schematic diagram of a battery pack provided in an embodiment of the present application.
• 1-battery module 10-cell assembly; 20-liquid cooling assembly;
• 111-battery core 111A-first side; 111B-second side; 111C-explosion-proof valve;
• 21A-battery cell accommodating tank 211-chassis; 231-bellows; 241-first current collector; 242-second current collector; 210-pressure relief hole;
• 221-cooling liquid flow channel 221A-liquid inlet; 221B-liquid outlet; 24A-liquid inlet hole; 24B-liquid outlet hole;
• 2-battery pack 2A-box; 2B-cell module; 2C-accommodation cavity; 2D-ring structure; 2E-pressure relief channel;
• 2A1-bottom plate 2A2-side beam; 2A3-liquid inlet pipeline; 2A4-liquid outlet pipeline; 2C1-accommodating sub-chamber;
• connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.
• connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.
• a first feature being “above” or “below” a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact.
• a first feature being “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
• a first feature being “below”, “below” and “below” a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
• the embodiments of the present application provide a battery module and a battery pack. They are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.
• the battery module 1 includes a battery cell assembly 10 and a tray 21.
• the battery cell assembly 10 includes a plurality of battery cell subgroups 11.
• the plurality of battery cell subgroups 11 are arranged at intervals along a first direction X.
• the battery cell subgroup 11 includes a plurality of battery cells 111. In any of the battery cell subgroups 11, the plurality of battery cells 111 are arranged at intervals along a second direction Y.
• the tray 21 includes a plurality of battery cell accommodating grooves 21A arranged at intervals along the first direction X.
• One battery cell accommodating groove 21A is arranged corresponding to one battery cell subgroup 11.
• a cooling liquid flow channel 221 is arranged in the side wall of the battery cell accommodating groove 21A.
• the power battery PACK grouping technology commonly used in the industry is the module-free battery (Cell To Pack CTP) technology, that is, the CTP technology is used, which does not require the use of end plates, side plates or straps and other structures, thereby reducing costs and improving product cost performance.
• the power battery will generate more heat during the charging and discharging process.
• a cooling system is required to dissipate the heat of the battery module, which makes the system design complex and the cost high.
• a coolant channel 221 is provided in the side wall of the battery cell accommodating groove 21A, so that the coolant channel 221 and the tray 21 are integrated into one, without the need for an additional liquid cooling plate, and the structure is more streamlined, which can effectively improve the space utilization of the battery module 1 and reduce the production cost of the battery module 1.
• Figure 1 is a structural diagram of a battery module provided in an embodiment of the present application
• Figure 2 is an exploded diagram of a battery module provided in an embodiment of the present application.
• the present embodiment provides a battery module 1, which includes a battery cell assembly 10 and a tray 21.
• the battery cell assembly 10 includes a plurality of battery cell subgroups 11, and the plurality of battery cell subgroups 11 are arranged at intervals along a first direction X.
• the battery cell subgroups 11 include a plurality of battery cells 111. In any of the battery cell subgroups 11, the plurality of battery cells 111 are arranged at intervals along a second direction Y.
• the tray 21 includes a plurality of battery cell accommodating grooves 21A arranged at intervals along the first direction X, and one battery cell accommodating groove 21A is arranged corresponding to one battery cell subgroup 11.
• a cooling liquid flow channel 221 is arranged in the side wall of the battery cell accommodating groove 21A.
• the battery module 1 also includes current collectors 24 arranged at both ends of the side walls of the battery cell accommodating groove 21A, and a connecting component 23 arranged between adjacent current collectors 24, one of the current collectors 24 is provided with a liquid inlet hole 24A, and the other current collector 24 is provided with a liquid outlet hole 24B; wherein, when the battery module 1 is in use, the coolant flow channel 221 is filled with coolant, and the coolant circulates in and out of the coolant flow channel 221 through the liquid inlet hole 24A and the liquid outlet hole 24B; wherein, the connecting component 23 includes but is not limited to a bellows 231.
• the first direction is marked with X
• the second direction is marked with Y
• the first direction X and the second direction Y form a preset angle
• this embodiment takes the preset angle as a right angle as an example to illustrate the present application.
• Figure 1A-A ⁇ is a cross-sectional schematic diagram
• Figure 4 is a top view of the liquid cooling assembly provided in an embodiment of the present application
• Figure 5 is a cross-sectional schematic diagram of the cooling plate provided in an embodiment of the present application.
• the tray 21 includes a chassis 211 and a plurality of cooling plates 22 located on the chassis 211.
• the plurality of cooling plates 22 are arranged at intervals along the first direction X.
• a battery cell accommodating groove 21A is located between adjacent cooling plates 22.
• the tray 21 and the cooling plate 22 can be integrally formed.
• the cooling plate 22 and the current collector 24 can be fixed by welding, so that the structure of the tray 21 is simple and the cost is reduced.
• the cooling plate 22 includes a plurality of cooling liquid channels 221, and the plurality of cooling liquid channels 221 are arranged at intervals along the third direction Z, and the cooling liquid channels 221 penetrate the cooling plate 22 along the second direction Y; both ends of the cooling liquid channel 221 have a liquid inlet 221A and a liquid outlet 221B, the liquid inlet 221A is connected to the liquid inlet hole 24A, and the liquid outlet 221B is connected to the liquid outlet hole 24B.
• the third direction is indicated by Z
• the third direction Z is perpendicular to the first direction X
• the third direction Z is perpendicular to the second direction Y.
• the battery module 1 includes a first current collector 241 and a second current collector 242, the first current collector 241 is provided with the liquid inlet hole 24A, the second current collector 242 is provided with the liquid outlet hole 24B, and the two ends of the coolant channel 221 have a liquid inlet 221A and a liquid outlet 221B, the liquid inlet 221A is connected to the first current collector 241, and the liquid outlet 221B is connected to the second current collector 242; wherein, the coolant channel 221 is preferably a linear channel, and the coolant circulates in and out of the cooling plate 22 through the liquid inlet hole 24A, the liquid inlet 221A, the coolant channel 221, the liquid outlet 221B and the liquid outlet hole 24B.
• a coolant channel 221 is provided on the side wall of the battery cell accommodating groove 21A, that is, in the cooling plate 22, so that the coolant channel 221 and the tray 21 are integrated into one, and the cooling plate 22 is filled with coolant, and the coolant circulates in and out of the cooling plate 22 through the liquid inlet hole 24A, the liquid inlet 221A, the coolant channel 221, the liquid outlet 221B and the liquid outlet hole 24B, thereby realizing liquid cooling of the battery cell 111, and there is no need to additionally set up a liquid cooling plate in the related technology, the structure is more streamlined, which can effectively improve the space utilization of the battery module 1 and reduce the production cost of the battery module 1.
• the battery cell 111 includes a first side 111A and a second side 111B, the first side 111A is arranged close to the side wall of the battery cell accommodating groove 21A, the second side 111B is located between adjacent battery cells 111, and the length of the first side 111A is greater than the length of the second side 111B;
• the battery module 1 also includes a thermal insulation layer 12 and a thermally conductive structural adhesive 13, the thermal insulation layer 12 is located between the second side 111B adjacent to the battery cells 111, and the thermally conductive structural adhesive 13 is located between the side wall of the battery cell accommodating groove 21A and the battery cell 111; wherein the thermal insulation layer 12 is preferably one or more of a fiber layer, thermal insulation foam, thermal insulation cotton and thermally conductive adhesive.
• the battery cell 111 is a square shell battery cell
• the cooling plate 22 is a straight structure to adapt to the first side 111A of the square shell battery cell; it can be understood that in this embodiment, the insulation layer 12 is arranged to be filled between adjacent battery cells 111, so as to improve the cooling efficiency of the battery cell 111; and, by arranging the thermal conductive structural adhesive 13 to be filled between the battery cell 111 and the cooling plate 22, the battery cell 111 and the cooling plate 22 are closely fitted, thereby improving the sealing and rigidity of the liquid cooling component 20, thereby preventing the battery cell 111 from expanding and affecting the service life of the battery module 1; in some embodiments, structural adhesive (not shown in the figure) can also be used to fix the battery cell 111 and the tray 21, and the connection is convenient and reliable, which effectively prevents the battery cell 111 from loosening and falling off.
• an explosion-proof valve 111C is provided on one side of the battery cell 111 close to the chassis 211; the chassis 211 is provided with a plurality of pressure relief holes 210, and the pressure relief holes 210 penetrate the chassis 211 along the thickness direction of the chassis, one pressure relief hole 210 is provided corresponding to one explosion-proof valve 111C, and one end of the battery cell 111 provided with the explosion-proof valve 111C is connected to the pressure relief hole 210.
• the battery cell 111 includes a thermal runaway injection port, and the thermal runaway injection port is arranged corresponding to the explosion-proof valve 111C, and the explosion-proof valve 111C is installed on the thermal runaway injection port; it can be understood that when a certain battery cell 111 on the tray 21 undergoes thermal runaway, the chemical substances and gases of the battery cell 111 are directedly ejected from the thermal runaway injection port, and the thermal runaway injection port of the battery cell 111 is aligned with the pressure relief hole 210. Therefore, the chemical substances and gases of the battery cell 111 are all directedly ejected into the pressure relief hole 210, thereby releasing pressure from the pressure relief hole 210 to the outside of the battery module 1.
• Figures 1, 4, 6 and 7 please combine Figures 1, 4, 6 and 7; wherein Figure 6 is a structural schematic diagram of the battery pack provided in the embodiment of the present application; and Figure 7 is a cross-sectional top view of the battery pack provided in the embodiment of the present application.
• the present embodiment provides a battery pack 2, which includes a box body 2A and multiple battery cell modules 2B.
• the box body 2A includes a bottom plate 2A1 and multiple side beams 2A2.
• the multiple side beams 2A2 are fixedly arranged on the edges of the bottom plate 2A1 to enclose a accommodating cavity 2C.
• the multiple battery cell modules 2B are located in the accommodating cavity 2C.
• the multiple battery cell modules 2B are arranged at intervals along the first direction X.
• the battery cell modules 2B include multiple battery modules 1 arranged at intervals along the second direction Y.
• the battery module 1 includes the battery module 1 described in any of the above embodiments.
• a plurality of the side beams 2A2 are connected in sequence to enclose a plurality of annular structures 2D, the annular structures 2D correspond one-to-one to the battery modules 1, and the annular structures 2D are arranged around the battery modules 1; specifically, the bottom plate 2A1 and the plurality of the side beams 2A2 form a plurality of accommodating sub-cavities 2C1 for placing the battery modules 1, and one accommodating sub-cavity 2C1 is arranged corresponding to one battery module 1.
• the technical solution of the present application is illustrated by taking the battery pack 2 including the first battery module 1A, the second battery module 1B, the third battery module 1C and the fourth battery module 1D as an example.
• the multiple cooling plates 22 include two first cooling plates 22A and multiple second cooling plates 22B, the two first cooling plates 22A are arranged relatively to each other along the first direction X, and the multiple second cooling plates 22B are arranged at intervals between the two first cooling plates 22A, and the first cooling plate 22A includes an extension portion 22A1, which extends from the end of the first cooling plate 22A in a direction away from the second cooling plate 22B, and the extension portion 22A1 is fixedly connected to the side beam 2A2.
• the extension portion 22A1 includes a plurality of first openings 22A11 spaced apart along the second direction Y
• the side beam 2A2 includes a plurality of second openings spaced apart along the second direction Y
• the first openings 22A11 correspond one to one with the second openings (not shown in the figure)
• the extension portion 22A1 and the side beam 2A2 are connected by threads.
• the first cooling plate 22A includes an extension portion 22A1, and the extension portion 22A1 extends from the end of the first cooling plate 22A in a direction away from the second cooling plate 22B, and the extension portion 22A1 is fixedly connected to the side beam 2A2, so as to limit the battery module 1, thereby preventing the battery module 1 from moving when the battery pack 2 is subjected to external impact, thereby improving the stability of the battery pack 2; at the same time, by setting the extension portion 22A1 and the side beam 2A2 to be connected by a thread, the disassembly and maintenance of the battery module 1 are facilitated.
• the box body 2A also includes a liquid outlet pipeline 2A4 located between adjacent battery cell modules 2B, and two liquid inlet pipelines 2A3 arranged opposite to each other along the first direction X, the liquid inlet pipeline 2A3 is located on the side of the battery module 1 away from the liquid outlet pipeline 2A4, the liquid outlet pipeline 2A4 is provided with a plurality of liquid outlet openings 2A41 arranged in sequence along the second direction Y, and the liquid inlet pipeline 2A3 is provided with a plurality of liquid inlet openings 2A31 arranged in sequence along the second direction Y; in any of the battery modules 1, one of the liquid inlet openings 2A31 is arranged corresponding to one of the first cooling plates 22A, and the liquid inlet opening 2A31 is connected to the liquid inlet hole 24A of the current collector 24 corresponding to the first cooling plate 22A, and one of the liquid outlet openings 2A41 is arranged corresponding to another first cooling plate 22A, and the liquid outlet opening 2A41 is connected to the liquid outlet hole 24
• the liquid inlet pipeline 2A3 includes a liquid inlet pipe port 2A32
• the liquid outlet pipeline 2A4 includes a liquid outlet pipe port 2A42
• the liquid inlet pipe port 2A32 is connected to an external device (not shown in the figure)
• the liquid outlet pipe port 2A42 is connected to the external device; wherein, the external device is a prior art, which can provide cooling liquid to the liquid cooling component 20, and can also recover the cooling liquid flowing out of the liquid cooling component 20.
• the coolant enters the cooling plate 22 from the liquid inlet pipe 2A32, the coolant circulates in and out of the cooling plate 22 through the liquid inlet hole 24A and the liquid outlet hole 24B, and the coolant flows back to the external device from the liquid outlet pipe 2A42, wherein, in the first battery module 1A, the flow direction of the coolant is a1 ⁇ b1 ⁇ c1 ⁇ d1 ⁇ e1; in the second battery module 1B, the flow direction of the coolant is a1 ⁇ b2 ⁇ c2 ⁇ d2 ⁇ e2; in the third battery module 1C, the flow direction of the coolant is a2 ⁇ b3 ⁇ c3 ⁇ d3 ⁇ e2; in the fourth battery module 1D, the flow direction of the coolant is a2 ⁇ b4 ⁇ c4 ⁇ d4 ⁇ e2.
• the box body 2A is provided to also include a liquid outlet pipeline 2A4 located between adjacent battery modules 2B, and two liquid inlet pipelines 2A3 arranged relatively along the first direction X, thereby simplifying the structure, reducing the installation space, facilitating disassembly and maintenance, and also reducing the cost; and, the cooling liquid is made to flow in from both sides of the box body 2A, and then flow out from between the adjacent battery modules 2B, thereby reducing the flow resistance of the cooling liquid inlet in the liquid cooling component 20 and improving the heat dissipation effect of the cooling plate 22; and, by arranging the liquid outlet pipeline 2A4 between the two battery modules 2B, the cooling liquid flows from the liquid inlet pipelines 2A3 on both sides into the cooling plates 22 of each module and then converges in the liquid outlet pipeline 2A4 in the middle, and only one liquid outlet pipeline 2A4 is needed to realize reflux, which can save space, and the method of converging from both sides to the middle can improve the temperature uniform
• Figures 3, 6, 7 and 8 wherein Figure 8 is a cross-sectional schematic diagram of the battery pack provided in an embodiment of the present application.
• the tray 21, the bottom plate 2A1 and the side beam 2A2 enclose a pressure relief channel 2E, and the pressure relief hole 210 is connected to the pressure relief channel 2E; specifically, the aperture of the pressure relief hole 210 is smaller than the diameter of the battery cell 111, and the design of the pressure relief channel 2E reduces the impact generated when the battery cell 111 bursts, thereby improving the safety of the battery module 1; at the same time, the provision of the pressure relief hole 210 can quickly discharge the heat of the battery cell 111 or the gas generated during thermal runaway of the battery from the bottom of the battery cell 111, thereby enhancing the heat dissipation effect, increasing the safety performance of the battery pack 2 structure, reducing the gas pressure inside the battery pack 2, and preventing the gas generated by the battery cell 111 from entering the accommodating cavity 2C, thereby ensuring that the temperature of the accommodating cavity 2C does not rise rapidly.
• the material of the box body 2A is metal material
• the tray 21 is made of plastic or other materials with good insulation, which can prevent the bottom surface of the battery cell 111 from contacting the bottom plate 2A1, thereby playing an insulating and protective role; at the same time, a mica board can be arranged between the tray 21 and the bottom plate 2A1, and the mica board covers the pressure relief hole 210.
• the chemicals and gases sprayed by the battery cell 111 are first sprayed onto the mica board, thereby preventing the box body 2A from being burned through.
• This embodiment provides an electrical device, which includes the battery module described in any of the above embodiments.
• the electrical equipment includes a battery module, and the battery module is used as a power supply for the electrical equipment. Therefore, the electrical equipment also has the advantages of the above-mentioned battery module, which helps to simplify the overall structure of the electrical equipment; wherein, the electrical equipment can be a car, an aircraft, a mechanical production equipment, etc.

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• 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)
• Connection Of Batteries Or Terminals (AREA)
• Gas Exhaust Devices For Batteries (AREA)

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• 2023
  • 2023-06-20 CN CN202321591191.4U patent/CN220021368U/zh active Active
  • 2023-11-20 EP EP23936787.3A patent/EP4513643A4/en active Pending
  • 2023-11-20 KR KR1020247035775A patent/KR20240178257A/ko active Pending
  • 2023-11-20 WO PCT/CN2023/132534 patent/WO2024259885A1/zh not_active Ceased
  • 2023-11-20 JP JP2024564952A patent/JP7841123B2/ja active Active
• 2024
  • 2024-12-29 US US19/004,406 patent/US20250140982A1/en active Pending

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