CN117996261A - Battery module, battery pack and vehicle - Google Patents

Battery module, battery pack and vehicle Download PDF

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Publication number
CN117996261A
CN117996261A CN202311675878.0A CN202311675878A CN117996261A CN 117996261 A CN117996261 A CN 117996261A CN 202311675878 A CN202311675878 A CN 202311675878A CN 117996261 A CN117996261 A CN 117996261A
Authority
CN
China
Prior art keywords
cooling
battery
battery module
face
shoulder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311675878.0A
Other languages
Chinese (zh)
Inventor
商艺宝
赵鹏飞
陈晓强
肖聪
徐超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing CHJ Automobile Technology Co Ltd
Original Assignee
Beijing CHJ Automobile Technology Co Ltd
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 Beijing CHJ Automobile Technology Co Ltd filed Critical Beijing CHJ Automobile Technology Co Ltd
Priority to CN202311675878.0A priority Critical patent/CN117996261A/en
Publication of CN117996261A publication Critical patent/CN117996261A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • 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
    • H01M10/643—Cylindrical 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
    • H01M10/64—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
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6553—Terminals or leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a battery module, a battery pack and a vehicle, wherein the battery module comprises a battery cell group, a bus bar and first cooling plates, the battery cell group is provided with a plurality of rows and is arranged along a first direction, the battery cell group comprises a plurality of battery cells arranged along a second direction, the second direction is perpendicular to the first direction, the battery cells comprise a first end face and pole posts arranged on the first end face, the bus bar is electrically connected with the pole posts, the first cooling plates are provided with a plurality of first cooling surfaces and second cooling surfaces which are opposite along a third direction, the first end face of each battery cell is in heat exchange connection with the first cooling surfaces of at least one first cooling plate, and each bus bar is in heat exchange connection with the first cooling surfaces and/or the second cooling surfaces of at least one first cooling plate. The battery module provided by the invention has the advantages of good heat exchange effect on the battery core electrode column and the bus bar, and stable and efficient energy supplementing speed of the battery core.

Description

Battery module, battery pack and vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to a battery module, a battery pack and a vehicle.
Background
Along with the gradual increase of the market occupation rate of the electric vehicle, the requirement of a user on the energy supplementing speed of the electric vehicle is gradually increased. The main measure for improving the energy supplementing speed is high-rate quick charging, and the measure enables the charging current peak value of the whole package to reach 5C or higher by expanding the charging rate boundary of the battery cell. The rise of the charging current can lead the joule heat generated by the mechanical parts in the battery core, the bus bars in the battery pack and other overcurrent elements to rise exponentially.
In the related art, the liquid cooling plate is adopted to cool the top part of the battery cell, which is provided with the pole, however, the liquid cooling plate is usually a large plate in heat exchange contact with the top parts of the poles in all battery cells, and the liquid cooling plate can only be in heat exchange contact with the bus bar and the end face of the battery cell, which is provided with the pole, through the lower surface, so that the heat exchange area between the liquid cooling plate and the battery cell and the bus bar is small, the heat exchange efficiency is low, and the battery cell is easy to overheat, the power is limited, and the quick energy supplementing requirement cannot be met.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides a battery module which has the advantages of good heat exchange effect on the battery core polar column and the bus bar, stable energy supplementing speed of the battery core and high efficiency.
The embodiment of the invention also provides a battery pack.
Embodiments of the present invention further provide a vehicle.
The battery module comprises a battery cell group, a busbar and a first cooling plate, wherein the battery cell group is provided with a plurality of rows and is arranged along a first direction, the battery cell group comprises a plurality of battery cells arranged along a second direction, the second direction is perpendicular to the first direction, and the battery cells comprise a first end face and a pole post arranged on the first end face; the busbar is electrically connected with the pole; the first cooling plates are arranged at intervals along the first direction, the first cooling plates are provided with a first cooling surface and a second cooling surface which are opposite along the third direction, the first end face of each battery cell is in heat exchange connection with the first cooling surface in at least one first cooling plate, and each busbar is in heat exchange connection with the first cooling surface and/or the second cooling surface in at least one first cooling plate.
According to the battery module provided by the embodiment of the invention, the plurality of first cooling plates are arranged on the first end faces of the electric cores and are in heat exchange connection with the first end faces of each electric core through the first cooling faces in at least one first cooling plate, and at the moment, the first cooling plates are adjacent to the pole columns on the first end faces so as to realize effective cooling of the pole columns. Meanwhile, each busbar can be connected with the first cooling surface in at least one first cooling plate in a heat exchange mode, can also pass through gaps of two adjacent first cooling plates and be connected with the second cooling surface in at least one first cooling plate in a heat exchange mode, so that the total heat exchange area between the first cooling plates and the busbar and the battery cell is increased, direct cooling of the busbar is achieved, heat generated by mechanical parts such as winding lugs in the battery cell can be quickly taken away by the first cooling plates through the first end face and the busbar, and the limitation of power of the battery cell caused by local overtemperature of the battery module is effectively avoided.
In some embodiments, the first end face includes first and second shoulders spaced apart along the first direction; wherein,
In any two adjacent columns of the cell groups, the first shoulder and the second shoulder which are adjacent to each other are simultaneously in heat exchange connection with the first cooling surface of one first cooling plate, the first shoulder is in heat exchange connection with the first cooling surface of one first cooling plate at the edge in one column of the cell groups, and the second shoulder is in heat exchange connection with the first cooling surface of the other first cooling plate at the edge in the other column of the cell groups;
Or the number of the first cooling plates is twice that of the battery cell groups, each battery cell group corresponds to two first cooling plates, and the first shoulder and the second shoulder in each battery cell group are respectively in heat exchange connection with the first cooling surfaces of the corresponding two first cooling plates.
In some embodiments, the ratio of the area of the first shoulder to the area of the first end face is 10% -50%, and the ratio of the area of the second shoulder to the area of the first end face is 10% -50%.
In some embodiments, the first cooling plates have first and second ends opposite in the second direction, the battery module further comprising first, second, third, water inlet and water outlet headers, the first header being in communication with the first end of each of the first cooling plates; the second collecting pipe is communicated with a part of second ends of the first cooling plates; the third collecting pipe is communicated with the second ends of the rest parts of the first cooling plates, and the two parts of the first cooling plates are alternately arranged along the first direction; the water inlet joint is communicated with the second collecting pipe, and the water outlet joint is communicated with the third collecting pipe.
In some embodiments, the first collecting pipe, the second collecting pipe and the third collecting pipe are all communicated with the first cooling plate through quick connectors, the quick connectors comprise two-way connectors and/or three-way connectors with a steering angle of 90 degrees, and the first collecting pipe, the second collecting pipe and the third collecting pipe are all located on one side, adjacent to the electric core, of the first cooling plate.
In some embodiments, the second header and the third header are spaced apart along the second direction, the cell includes a second end face opposite the first end face, and the second header and the third header are located between the first end face and the second end face in the third direction.
In some embodiments, the first cooling plate comprises a plate body, a first plug, a second plug, a first water nozzle and a second water nozzle, wherein a cooling flow channel penetrating through the plate body along the second direction is formed in the plate body; the first plug and the second plug are respectively connected with two ends of the plate body, and the first plug and the second plug respectively seal a first end opening and a second end opening of the cooling flow channel; the first water nozzle and the second water nozzle are connected with the wall forming the first cooling surface in the plate body, the first water nozzle and the second water nozzle are respectively arranged at the first end and the second end of the plate body and are communicated with the cooling flow channel, and the first water nozzle and the second water nozzle are connected with the quick connector.
In some embodiments, the plate body includes a bottom wall, a first side wall, a top wall, and a second side wall connected end to end in sequence, an outer surface of the bottom wall forming the first cooling surface, an outer surface of the top wall forming the second cooling surface, and a wall thickness of each of the bottom wall, the first side wall, the top wall, and the second side wall being greater than or equal to 0.4mm.
In some embodiments, the thickness of the wall forming the first cooling surface in the plate body is 0.8mm or greater, and at least one of the first plug, the second plug, the first water nozzle, and the second water nozzle is bonded or welded to the plate body.
In some embodiments, the first cooling surface is bonded to the first end surface of each of the cells by a heat conductive adhesive and/or the second cooling surface is bonded to the buss bar by a heat conductive adhesive; wherein,
The thermal conductivity coefficient of the thermal conductive adhesive is more than or equal to 2W/(m.times.K), the thixotropy is more than 4, and the thickness is less than or equal to 0.5mm.
In some embodiments, a surface of at least one of the first cooling plate and the busbar is provided with an insulating layer, the first cooling plate and the busbar being in insulating contact by the insulating layer.
In some embodiments, the thermal conduction system of the insulating layer is greater than or equal to 0.6W/(m×k), the volume resistivity is greater than or equal to 7e+15Ω×cm, and the thickness is less than or equal to 0.25mm.
In some embodiments, the second cooling surface is in heat exchange connection with each of the bus bars, the third direction is consistent with the thickness direction of the first cooling plate, the bus bars are connected with the end faces of the pole, the distance between the end faces of the pole and the second cooling surface is 0-6mm, and the thickness of the first cooling plate is 3mm or more.
In some embodiments, the busbar includes a first connection portion, a second connection portion, and a heat dissipation portion, where the first connection portion and the second connection portion are respectively electrically connected to the poles on different cells, and the heat dissipation portion is located on a side of the first cooling plate facing away from the first end face and is in heat exchange connection with the second cooling face.
In some embodiments, the buss bars include a first buss bar connecting adjacent two of the cells in the same cell group in series and a second buss bar connecting adjacent two of the cell groups in series;
The heat dissipation part in the first busbar is connected with at least one of the first connection part and the second connection part, and the heat dissipation part is in heat exchange connection with the second cooling surface on one or two adjacent first cooling plates;
The heat dissipation part in the second busbar is connected with the first connection part and the second connection part, and the heat dissipation part is in heat exchange connection with the second cooling surface on the first cooling plate between the first connection part and the second connection part.
In some embodiments, the electrode posts include positive and negative electrode posts spaced apart along the first direction;
Or the electrode post comprises one of an anode post and a cathode post, the battery cell comprises a second end face opposite to the first end face, the second end face is provided with the other one of the anode post and the cathode post, and the first end face of any two adjacent battery cells in the same battery cell group is respectively provided with the anode post and the cathode post.
In some embodiments, the first cooling plates include a plurality of first cooling plates arranged at intervals along the first direction, the first end face includes a first shoulder and a second shoulder arranged at intervals along the first direction, in any two adjacent columns of the cell groups, the first shoulder and the second shoulder adjacent to each other are simultaneously connected with the first cooling surface of one of the first cooling plates in a heat exchange manner, in one column of the cell groups at an edge, the first shoulder is connected with the first cooling surface of one of the first cooling plates at an edge in a heat exchange manner, in the other column of the cell groups at an edge, and the second shoulder is connected with the first cooling surface of the other one of the first cooling plates at an edge in a heat exchange manner; wherein,
The cross-sectional area of the cooling flow channels in the first cooling plate at the edge is half the cross-sectional area of the cooling flow channels in the first cooling plate at the middle, and/or the cross-sectional area of the inlets and outlets in the first cooling plate at the edge is half the cross-sectional area of the inlets and outlets in the first cooling plate at the middle.
The battery pack according to the embodiment of the invention includes the battery module according to any one of the embodiments described above.
The technical advantages of the battery pack according to the embodiment of the present invention are the same as those of the battery module of the above embodiment, and will not be described here again.
A vehicle according to an embodiment of the present invention includes the battery pack of the above embodiment.
Technical advantages of the vehicle according to the embodiment of the present invention are the same as those of the battery pack of the above embodiment, and will not be described here again.
Drawings
Fig. 1 is an isometric view of a battery module according to an embodiment of the present invention.
Fig. 2 is a top view of a battery module according to an embodiment of the present invention.
Fig. 3 is a partially enlarged schematic view of a battery module at a water inlet joint according to an embodiment of the present invention.
Fig. 4 is a partially enlarged left side view of the battery module according to the embodiment of the present invention at the first cooling plate.
Fig. 5 is a partially enlarged schematic view of a battery module at a first bus bar according to an embodiment of the present invention.
Fig. 6 is an enlarged partial schematic view of a battery module according to an embodiment of the present invention, in which the battery cells are blade battery cells.
Fig. 7 is another enlarged partial schematic view of a battery module according to an embodiment of the present invention, in which the battery cells are cylindrical battery cells.
Reference numerals:
1. A battery cell; 11. a first shoulder; 12. a second shoulder; 13. a pole; 2. a first bus bar; 21. a first connection portion; 22. a second connecting portion; 23. a heat dissipation part; 24. a bending part; 3. a second bus bar; 4. a first cooling plate; 41. a plate body; 411. a first cooling surface; 412. a second cooling surface; 42. a first plug; 43. a first water nozzle; 5. a first header; 6. a second header; 7. a third header; 8. a water inlet joint; 9. a water outlet joint; 10. a quick connector; 110. and a heat dissipation layer.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A battery module according to an embodiment of the present invention is described below with reference to fig. 1 to 7.
The battery module comprises a battery cell group, a busbar and a first cooling plate. The battery cell group is provided with a plurality of rows and is arranged along a first direction, the battery cell group comprises a plurality of battery cells 1 arranged along a second direction, the second direction is perpendicular to the first direction, and the battery cells 1 comprise a first end face and a pole 13 arranged on the first end face. The bus bar is electrically connected to the pole 13. The first cooling plates 4 are plural and arranged at intervals along the first direction, the first cooling plates 4 are provided with a first cooling surface 411 and a second cooling surface 412 which are opposite along the third direction, the first end surface of each cell 1 is in heat exchange connection with the first cooling surface 411 in at least one first cooling plate 4, and each busbar is in heat exchange connection with the first cooling surface 411 and/or the second cooling surface 412 in at least one first cooling plate.
According to the battery module of the embodiment of the invention, the first cooling plates 4 are arranged on the first end faces of the battery cells 1 and are in heat exchange connection with the first end faces of each battery cell 1 through the first cooling faces 411 in at least one first cooling plate 4, and at this time, the first cooling plates 4 are adjacent to the pole posts 13 on the first end faces so as to realize effective cooling of the pole posts 13. Meanwhile, each busbar can be in heat exchange connection with the first cooling surface 411 in at least one first cooling plate 4, can also pass through the gaps of two adjacent first cooling plates 4 and be in heat exchange connection with the second cooling surface 412 in at least one first cooling plate 4, so that the total heat exchange area between the first cooling plates and the busbar and the battery cell 1 is increased, meanwhile, the direct cooling of the busbar is realized, and further, the heat generated by mechanical parts such as winding lugs in the battery cell 1 can be quickly taken away by the first cooling plates through the first end surface and the busbar, and the limitation of the power of the battery cell 1 caused by the local overtemperature of the battery module is effectively avoided, and the energy supplementing of the battery cell 1 is efficient and stable.
The design of the first cooling plate 4 also effectively prevents the battery pack from thermal runaway caused by the overhigh temperature of the winding tab inside the battery core 1, and the use safety of the battery pack is higher.
For ease of understanding, the direction indicated by the arrow Y in fig. 1 is the second direction of the battery module according to the embodiment of the present invention, the direction indicated by the arrow X in fig. 1 is the first direction of the battery module according to the embodiment of the present invention, and the direction indicated by the arrow Z in fig. 1 is the third direction of the battery module according to the embodiment of the present invention.
In some embodiments, the first end face includes a first shoulder 11 and a second shoulder 12 spaced apart along the first direction.
As shown in fig. 1-5 and 7, in any two adjacent rows of cell groups, the adjacent first shoulder 11 and second shoulder 12 are simultaneously connected with the first cooling surface 411 of one first cooling plate 4 in a heat exchange manner, in one row of cell groups at the edge, the first shoulder 11 is connected with the first cooling surface 411 of one first cooling plate 4 at the edge in a heat exchange manner, in the other row of cell groups at the edge, and the second shoulder 12 is connected with the first cooling surface 411 of the other first cooling plate 4 at the edge in a heat exchange manner. Therefore, heat exchange contact with the first shoulders 11 and the second shoulders 12 of all the battery cells 1 can be realized by only arranging a smaller number of first cooling plates 4, so that the cooling requirements on the battery cells 1 and the bus bars are met, and meanwhile, the assembly efficiency of the battery module is further improved.
Or as shown in fig. 6, the number of the first cooling plates 4 is twice that of the cell groups, each cell group corresponds to two first cooling plates 4, and the first shoulder 11 and the second shoulder 12 in each cell group are respectively connected with the first cooling surfaces 411 of the corresponding two first cooling plates 4 in a heat exchange manner. That is, each cell group is provided with two independent first cooling plates 4, the connection error between the first cooling plates 4 and the first end face of the corresponding cell 1 is smaller, and the connection strength and the connection reliability between the first cooling plates 4 and the corresponding cell 1 are higher.
As shown in fig. 6, the first end face is provided with a pole 13, and the widths of the first shoulder 11 and the second shoulder 12 on both sides of the pole 13 are larger, so that it is more convenient to separately provide a first cooling plate 4.
In some embodiments, the ratio of the area of the first shoulder 11 to the area of the first end face is 10% -50% and the ratio of the area of the second shoulder 12 to the area of the first end face is 10% -50%.
The total area of the first shoulder 11 and the second shoulder 12, namely the total contact area between the first cooling plate 4 and the first end face, ensures that the cooling effect of the first cooling plate 4 on mechanical parts near the pole 13 of the battery cell 1 is better, and can effectively avoid the pole 13 and possible explosion-proof valves and FPC on the first end face, and ensures that the setting of the first cooling plate 4 does not affect the original functions of the battery module.
Specifically, the ratio of the area of the first shoulder 11 to the area of the first end face is 10%, 30% or 50%, and the ratio of the area of the second shoulder 12 to the area of the first end face is 10%, 30% or 50%.
In some embodiments, as shown in fig. 1 and 2, the first cooling plate 4 has first and second ends opposite in the second direction, and the battery module further includes a first manifold 5, a second manifold 6, a third manifold 7, a water inlet joint 8, and a water outlet joint 9. The first header 5 communicates with a first end of each first cooling plate 4, and the second header 6 communicates with a second end of a portion of the first cooling plates 4. The third header 7 communicates with the second ends of the remaining portions of the first cooling plates 4, and the two portions of the first cooling plates 4 are alternately arranged in the first direction. The water inlet joint 8 is communicated with the second collecting pipe 6, and the water outlet joint 9 is communicated with the third collecting pipe 7.
In the cooling working condition, the first cooling plates 4 absorb heat from the battery cells 1 and the bus bars, the temperature of the internal cooling liquid gradually rises along the flowing direction, the first cooling plates 4 communicated with the second collecting pipe 6 and the first cooling plates 4 communicated with the third collecting pipe 7 are alternately arranged along the first direction, so that the flow directions of the cooling liquid in the two first cooling plates 4 corresponding to the first shoulder 11 and the second shoulder 12 of each battery cell 1 are opposite, and therefore the heat exchange between each battery cell 1 and the two first cooling plates 4 in the same battery cell 1 row is approximately the same, and the temperature uniformity of each battery cell 1 in the same battery cell 1 row is effectively ensured.
Illustratively, the battery cells 1 are arranged in six rows, and the first cooling plates 4 have seven, wherein the second ends of three first cooling plates 4 are communicated with the second collecting pipe 6, and the second ends of the other four first cooling plates 4 are communicated with the third collecting pipe 7.
In some embodiments, the first header 5, the second header 6 and the third header 7 are all communicated with the first cooling plate 4 through a quick connector 10, wherein the quick connector 10 comprises a two-way connector and/or a three-way connector with a steering angle of 90 degrees, and the first header 5, the second header 6 and the third header 7 are all positioned on one side of the first cooling plate 4 adjacent to the electric core 1.
Through turning to the two way connection and/or three way connection that the angle is 90, realize the intercommunication of each and first cooling plate 4 in first pressure manifold 5, second pressure manifold 6 and the third pressure manifold 7 to and set up first pressure manifold 5, second pressure manifold 6 and third pressure manifold 7 in the below of first cooling plate 4, can flow down the coolant liquid in the first cooling plate 4 to make its flow direction change into first direction by the second direction, neither can occupy the extra first direction of battery module and the space of second direction, also can not excessively occupy the space size of third direction i.e. the altitude direction, effectively guarantee battery package energy density demand.
Specifically, among the plurality of first cooling plates 4 communicated with the second collecting pipe 6, the first cooling plate 4 positioned at the edge is communicated with the second collecting pipe 6 through a two-way joint, and the first cooling plate 4 positioned in the middle is communicated with the second collecting pipe 6 through a three-way joint; among the plurality of first cooling plates 4 communicated with the third collecting pipe 7, the first cooling plate 4 positioned at the edge is communicated with the second collecting pipe 6 through a two-way joint, and the first cooling plate 4 in the middle is communicated with the third collecting pipe 7 through a three-way joint.
In some embodiments, as shown in fig. 2, the second header 6 and the third header 7 are spaced apart along the second direction, the cell1 includes a second end surface opposite to the first end surface, and the second header 6 and the third header 7 are positioned between the first end surface and the second end surface in the third direction. Compared with the arrangement of the two parts along the third direction, the structure beam of the battery pack can be avoided, the second collecting pipe 6 and the third collecting pipe 7 are also effectively prevented from being oversized along the third direction, the size of the battery module in the height direction is occupied, and the energy density requirement of the battery pack is further ensured.
As shown in fig. 2, the third header 7 is located on the side of the second header 6 facing away from the cell 1.
In some embodiments, as shown in fig. 4, the first cooling plate 4 includes a plate body 41, a first plug 42, a second plug, a first water nozzle 43, and a second water nozzle. The plate body 41 has a cooling flow passage formed therein to penetrate the plate body 41 in the second direction. The first plug 42 and the second plug are respectively connected with two ends of the plate 41, and the first plug 42 and the second plug respectively close the first end opening and the second end opening of the cooling flow channel. The first water nozzle 43 and the second water nozzle are connected with the wall forming the first cooling surface 411 in the plate body 41, the first water nozzle 43 and the second water nozzle are respectively arranged at the first end and the second end of the plate body 41 and are communicated with the cooling flow passage, and the first water nozzle 43 and the second water nozzle are connected with the quick connector 10.
The first water nozzle 43 and the second water nozzle are connected under the plate body 41 such that the first water nozzle 43 and the second water nozzle do not occupy the dimension of the battery module in the height direction. The plate 41 can be formed by extrusion process, and has convenient processing and low cost.
In some embodiments, the plate 41 includes a bottom wall, a first side wall, a top wall, and a second side wall connected end to end in this order, the outer surface of the bottom wall forms a first cooling surface 411, the outer surface of the top wall forms a second cooling surface 412, and the wall thickness of each of the bottom wall, the first side wall, the top wall, and the second side wall is 0.4mm or more.
This setting makes plate body 41 can adopt extrusion process machine-shaping, still can all design the wall thickness of each in diapire, first lateral wall, roof and the second lateral wall to 0.4mm to reduce the occupation in direction of height space as far as possible, further guarantee battery package energy density demand.
For example, the plate 41 is made of 3003 aluminum, and the wall thickness of any position in the plate 41 is 0.4mm, 0.5mm, 0.8mm or 1mm.
In some embodiments, the thickness of the wall of the plate 41 forming the first cooling surface 411 is 0.8mm or more, and at least one of the first plug 42, the second plug, the first water nozzle 43, and the second water nozzle is bonded or welded to the plate 41.
That is, the wall thickness of the bottom wall is 0.8mm or more, and in this dimension, the first plug 42, the second plug, the first water nozzle 43 and the second water nozzle can be connected with the plate 41 by brazing or laser welding, so that the tact of the production line and the airtight reliability can be improved, and the space occupied by the plate 41 in the height direction can be reduced to the maximum extent.
In some embodiments, the second cooling surface 412 is in heat exchange connection with each busbar, the third direction coincides with the thickness direction of the first cooling plate 4, the busbar is connected to the end surface of the pole 13, the distance between the end surface of the pole 13 and the second cooling surface 412 is 0-6mm, and the thickness of the first cooling plate 4 is 3mm or more.
The thickness of the first cooling plate 4 is more than or equal to 3mm so as to ensure that the cooling flow passage inside the first cooling plate has enough cross-sectional area, ensure that the flow resistance inside the first cooling plate 4 is not too high and meet the flow requirement of the whole package. On the basis, the difference between the two ends of the Yu Ji high column 13 of the second cooling plate 4 does not exceed 6mm, so that the space of the battery module in the height direction occupied by the first cooling plate 4 is further avoided, and the energy density requirement of the whole package is ensured.
Specifically, at least a portion of the busbar is located above the first cooling plate 4 and is in heat exchange connection with the second cooling surface 412, at this time, the portion of the busbar located above the first cooling plate 4 may be bent upward or downward relative to another portion, and the busbar may also be a straight plate, specifically, in order that the second cooling surface 412 of the first cooling plate 4 is higher than, lower than, or coplanar with the end surface of the pole 13.
In some embodiments, as shown in fig. 4, the first cooling surface 411 is bonded to the first end surface of each cell 1 by a heat conductive adhesive, and/or the second cooling surface 412 is bonded to the busbar by a heat conductive adhesive. Thereby ensuring the cooling reliability of the first cooling plate 4 to the battery cell 1 and the bus plate.
Under the condition that the bottoms of the battery cells 1 are connected through the second cooling plates in an adhering mode, the first cooling plates 4 are adhered to each battery cell 1 to provide sufficient restraining force for the tops of the battery cells 1, and the situation that the battery cells 1 are inclined due to the fact that the restraining force of the bottoms of the battery cells 1 is inconsistent with that of the tops of the battery cells 1 is effectively avoided, and then the battery cells 1 leak due to the fact that the polar posts 13 are pulled is avoided.
Specifically, the heat-conducting adhesive can be adhesive with enough bonding strength such as heat-conducting structural adhesive and double-sided adhesive, and the heat conductivity coefficient of the heat-conducting adhesive is more than or equal to 2W/(m.times.K) and the thixotropy is more than 4, so that the thickness of the heat-conducting adhesive can be limited below 0.5mm while the heat-conducting adhesive meets the heat-conducting requirement and the bonding strength requirement, and the occupation of the heat-conducting adhesive to the space of the battery module in the height direction is further reduced.
In some embodiments, the surface of at least one of the first cooling plate 4 and the bus bar is provided with an insulating layer, and the first cooling plate 4 and the bus bar are in insulating contact through the insulating layer.
The first cooling plate 4 and the bus bars are subjected to insulation treatment, so that safety between the bus bars can be improved, and the stability and reliability of a battery module circuit are ensured.
Specifically, the insulating layer may be fixed on the surfaces of the first cooling plate 4 and the bus bar by spraying insulating paint or insulating powder, hot-pressing or cold-pressing an insulating film, or the like. At the same time, the surface of the busbar welded to the pole 13 is not insulated.
In some embodiments, the thermal conductivity system of the insulating layer is greater than or equal to 0.6W/(m×k), the volume resistivity is greater than or equal to 7e+15Ω×cm, and the thickness is less than or equal to 0.25mm. This setting can enough guarantee insulating strength, also can not lead to the thermal resistance of insulating layer big because of its thickness is too thick, effectively improves the heat exchange efficiency between busbar and electric core 1 and the first cooling plate 4.
In some embodiments, as shown in fig. 4-7, the busbar includes a first connection portion 21, a second connection portion 22, and a heat dissipation portion 23, where the first connection portion 21 and the second connection portion 22 are respectively electrically connected to the posts 13 on different electrical cores 1, and the heat dissipation portion 23 is located on a side of the first cooling plate 4 facing away from the first end surface and is in heat exchange connection with the second cooling surface 412.
The busbar is connected with the first cooling plate 4 through the extended heat dissipation part 23 in a heat exchange manner so as to realize cooling of the first connection part 21 and the second connection part 22 in the busbar. The heat dissipation portion 23 at this time can be located above the first cooling plate 4 so as to be away from the first cooling plate 4, and can be brought into contact with the second cooling surface 412, thereby reducing the stress influence due to the flatness of the contact surface.
Specifically, as shown in fig. 1 to 3, the bus bars include a first bus bar 2 connecting adjacent two cells 1 in the same cell group in series and a second bus bar 3 connecting adjacent two cell groups in series. The heat dissipation portion 23 in the first busbar 2 is connected to at least one of the first connection portion 21 and the second connection portion 22, and the heat dissipation portion 23 is heat-exchange connected to the second cooling surface 412 on one or two adjacent first cooling plates 4. The heat dissipation portion 23 in the second busbar 3 connects the first connection portion 21 and the second connection portion 22, and the heat dissipation portion 23 is heat-exchange-connected with the second cooling surface 412 on the first cooling plate 4 located between the first connection portion 21 and the second connection portion 22.
In some embodiments, as shown in fig. 5, the first bus bar 2 further includes a bent portion 24 connecting the first connection portion 21 and the second connection portion 22, the bent portion 24 being bent toward the third direction and forming a groove extending in the first direction.
Therefore, when the battery cell 1 expands to cause the pole 13 to be pulled by the bus bar, the bus bar can generate certain stretching along with the deformation of the bending part 24, so that the leakage caused by overlarge stress of the pole 13 of the battery cell 1 is avoided.
In some embodiments, the battery module further includes a second cooling plate, the battery cells 1 including a second end face opposite the first end face, the second cooling plate being electrically connected to the second end face of each battery cell 1.
At this time, as shown in fig. 1 to 5 and 7, the electrode post 13 may include positive and negative electrode posts arranged at intervals along the first direction. Alternatively, as shown in fig. 6, the electrode post 13 may include one of a positive electrode post and a negative electrode post, the second end face is provided with the other one of the positive electrode post and the negative electrode post, and the first end faces of any two adjacent cells 1 in the same cell group are respectively provided with the positive electrode post and the negative electrode post. Any of the above arrangement forms of the battery cells 1 is not limited to the blade battery cells 1 and the cylindrical battery cells 1, and the battery cells 1 can be cooled at the position of the pole 13 through the first cooling plate 4, so that the rapid energy supplementing requirement of the battery module is ensured.
It should be noted that the number of columns of the battery cell group and the number of the battery cells 1 in the battery cell group can be flexibly designed according to the required electric quantity and voltage, and the total number of the battery cells 1 can be 160-220, so that the battery module can meet the use requirements of most molding.
In some embodiments, when the number of the first cooling plates 4 is one more than the number of columns of the cell groups, the cross-sectional area of the cooling flow channels in the first cooling plates 4 located at the edge is half the cross-sectional area of the cooling flow channels in the first cooling plates 4 located at the middle, and/or the cross-sectional area of the inlets and outlets in the first cooling plates 4 located at the edge is half the cross-sectional area of the inlets and outlets in the first cooling plates 4 located at the middle. Therefore, the flow in the first cooling plate 4 positioned at the edge can be half of the flow in the rest first cooling plates 4, the cooling effect of the first cooling plate 4 on each cell 1 is ensured to be approximately the same, and the temperature uniformity requirement of each cell 1 is further ensured.
The battery pack according to the embodiment of the invention includes the battery module according to any one of the embodiments described above.
The technical advantages of the battery pack according to the embodiment of the present invention are the same as those of the battery module of the above embodiment, and will not be described here again.
A vehicle according to an embodiment of the present invention includes the battery pack of the above embodiment.
Technical advantages of the vehicle according to the embodiment of the present invention are the same as those of the battery pack of the above embodiment, and will not be described here again.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (19)

1. A battery module, comprising:
The battery cell group is provided with a plurality of rows and is arranged along a first direction, the battery cell group comprises a plurality of battery cells arranged along a second direction, the second direction is perpendicular to the first direction, and the battery cells comprise a first end face and a pole arranged on the first end face;
a busbar electrically connected to the pole; and
The first cooling plates are arranged at intervals along the first direction, the first cooling plates are provided with first cooling surfaces and second cooling surfaces which are opposite along the third direction, the first end face of each battery cell is in heat exchange connection with the first cooling surface in at least one first cooling plate, and each busbar is in heat exchange connection with the first cooling surface and/or the second cooling surface in at least one first cooling plate.
2. The battery module of claim 1, wherein the first end face includes first and second shoulders spaced apart along the first direction; wherein,
In any two adjacent columns of the cell groups, the first shoulder and the second shoulder which are adjacent to each other are simultaneously in heat exchange connection with the first cooling surface of one first cooling plate, the first shoulder is in heat exchange connection with the first cooling surface of one first cooling plate at the edge in one column of the cell groups, and the second shoulder is in heat exchange connection with the first cooling surface of the other first cooling plate at the edge in the other column of the cell groups;
Or the number of the first cooling plates is twice that of the battery cell groups, each battery cell group corresponds to two first cooling plates, and the first shoulder and the second shoulder in each battery cell group are respectively in heat exchange connection with the first cooling surfaces of the corresponding two first cooling plates.
3. The battery module of claim 2, wherein the ratio of the area of the first shoulder to the area of the first end face is 10% -50%, and the ratio of the area of the second shoulder to the area of the first end face is 10% -50%.
4. The battery module of claim 2, wherein the first cooling plate has first and second ends opposite in the second direction, the battery module further comprising:
a first header communicating with a first end of each of the first cooling plates;
A second header communicating with a second end of a portion of the first cooling plates;
a third header communicating with the remaining portions of the second ends of the first cooling plates, the two portions of the first cooling plates being alternately arranged in the first direction; and
The water inlet joint is communicated with the second collecting pipe, and the water outlet joint is communicated with the third collecting pipe.
5. The battery module according to claim 4, wherein the first collecting pipe, the second collecting pipe and the third collecting pipe are all communicated with the first cooling plate through quick connectors, the quick connectors comprise two-way connectors and/or three-way connectors with a steering angle of 90 degrees, and the first collecting pipe, the second collecting pipe and the third collecting pipe are all located on one side, adjacent to the battery cell, of the first cooling plate.
6. The battery module of claim 4, wherein the second header and the third header are arranged at intervals along the second direction, the cell includes a second end face opposite to the first end face, and the second header and the third header are located between the first end face and the second end face in the third direction.
7. The battery module of claim 5, wherein the first cooling plate comprises:
The cooling flow passage penetrates through the plate body along the second direction;
The first plug and the second plug are respectively connected with two ends of the plate body, and the first plug and the second plug respectively seal a first end opening and a second end opening of the cooling flow channel;
The first water nozzle and the second water nozzle are connected with the wall forming the first cooling surface in the plate body, the first water nozzle and the second water nozzle are respectively arranged at the first end and the second end of the plate body and are communicated with the cooling flow channel, and the first water nozzle and the second water nozzle are connected with the quick connector.
8. The battery module of claim 7, wherein the plate body comprises a bottom wall, a first side wall, a top wall, and a second side wall connected end to end in sequence, an outer surface of the bottom wall forms the first cooling surface, an outer surface of the top wall forms the second cooling surface, and a wall thickness of each of the bottom wall, the first side wall, the top wall, and the second side wall is 0.4mm or more.
9. The battery module according to claim 7, wherein a thickness of a wall forming the first cooling surface in the plate body is 0.8mm or more, and at least one of the first plug, the second plug, the first water nozzle, and the second water nozzle is bonded or welded to the plate body.
10. The battery module according to claim 1, wherein the first cooling surface is bonded to the first end surface of each of the cells by a heat conductive adhesive, and/or the second cooling surface is bonded to the bus bar by a heat conductive adhesive; wherein,
The thermal conductivity coefficient of the thermal conductive adhesive is more than or equal to 2W/(m.times.K), the thixotropy is more than 4, and the thickness is less than or equal to 0.5mm.
11. The battery module according to claim 2, wherein a surface of at least one of the first cooling plate and the bus bar is provided with an insulating layer, and the first cooling plate and the bus bar are in insulating contact through the insulating layer.
12. The battery module according to claim 11, wherein the heat conduction system of the insulating layer is equal to or more than 0.6W/(m×k), and the volume resistivity is equal to or more than 7e+15Ω×cm, and the thickness is equal to or less than 0.25mm.
13. The battery module according to claim 1, wherein the second cooling surface is heat-exchanged with each of the bus bars, the third direction coincides with the thickness direction of the first cooling plate, the bus bars are connected with the end surfaces of the poles, the distance between the end surfaces of the poles and the second cooling surface is 0-6mm, and the thickness of the first cooling plate is 3mm or more.
14. The battery module according to claim 2, wherein the busbar comprises a first connection portion, a second connection portion and a heat dissipation portion, the first connection portion and the second connection portion are respectively electrically connected with the poles on different electric cores, and the heat dissipation portion is located on one side of the first cooling plate away from the first end face and is in heat exchange connection with the second cooling face.
15. The battery module of claim 14, wherein the buss bars include a first buss bar connecting adjacent two of the cells in the same cell group in series and a second buss bar connecting adjacent two of the cell groups in series;
The heat dissipation part in the first busbar is connected with at least one of the first connection part and the second connection part, and the heat dissipation part is in heat exchange connection with the second cooling surface on one or two adjacent first cooling plates;
The heat dissipation part in the second busbar is connected with the first connection part and the second connection part, and the heat dissipation part is in heat exchange connection with the second cooling surface on the first cooling plate between the first connection part and the second connection part.
16. The battery module according to claim 1, wherein the electrode posts include positive electrode posts and negative electrode posts arranged at intervals along the first direction;
Or the electrode post comprises one of an anode post and a cathode post, the battery cell comprises a second end face opposite to the first end face, the second end face is provided with the other one of the anode post and the cathode post, and the first end face of any two adjacent battery cells in the same battery cell group is respectively provided with the anode post and the cathode post.
17. The battery module according to claim 1, wherein the first cooling plate comprises a plurality of first cooling plates arranged at intervals along the first direction, the first end face comprises a first shoulder and a second shoulder arranged at intervals along the first direction, the adjacent first shoulder and the second shoulder in any two adjacent rows of the battery cell groups are simultaneously connected with the first cooling surface of one of the first cooling plates in a heat exchange manner, the first shoulder in one row of the battery cell groups is connected with the first cooling surface of one of the first cooling plates in a heat exchange manner, and the second shoulder in the other row of the battery cell groups is connected with the first cooling surface of the other one of the first cooling plates in a heat exchange manner; wherein,
The cross-sectional area of the cooling flow channels in the first cooling plate at the edge is half the cross-sectional area of the cooling flow channels in the first cooling plate at the middle, and/or the cross-sectional area of the inlets and outlets in the first cooling plate at the edge is half the cross-sectional area of the inlets and outlets in the first cooling plate at the middle.
18. A battery pack comprising the battery module according to any one of claims 1 to 17.
19. A vehicle comprising the battery pack of claim 18.
CN202311675878.0A 2023-12-07 2023-12-07 Battery module, battery pack and vehicle Pending CN117996261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311675878.0A CN117996261A (en) 2023-12-07 2023-12-07 Battery module, battery pack and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311675878.0A CN117996261A (en) 2023-12-07 2023-12-07 Battery module, battery pack and vehicle

Publications (1)

Publication Number Publication Date
CN117996261A true CN117996261A (en) 2024-05-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311675878.0A Pending CN117996261A (en) 2023-12-07 2023-12-07 Battery module, battery pack and vehicle

Country Status (1)

Country Link
CN (1) CN117996261A (en)

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