CN117438695A - Battery module, battery pack and electric automobile - Google Patents

Battery module, battery pack and electric automobile Download PDF

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Publication number
CN117438695A
CN117438695A CN202311356501.9A CN202311356501A CN117438695A CN 117438695 A CN117438695 A CN 117438695A CN 202311356501 A CN202311356501 A CN 202311356501A CN 117438695 A CN117438695 A CN 117438695A
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CN
China
Prior art keywords
heat exchange
battery
battery module
wall
shell
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
CN202311356501.9A
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Chinese (zh)
Inventor
程卓
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Lantu Automobile Technology Co Ltd
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Lantu Automobile Technology Co Ltd
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Filing date
Publication date
Application filed by Lantu Automobile Technology Co Ltd filed Critical Lantu Automobile Technology Co Ltd
Priority to CN202311356501.9A priority Critical patent/CN117438695A/en
Publication of CN117438695A publication Critical patent/CN117438695A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—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
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The application discloses battery module, battery package and electric automobile, battery module includes: the battery cell comprises a battery cell body and a battery cell shell coated outside the battery cell body, wherein the battery cell shell comprises electrode walls which are oppositely arranged and heat exchange walls adjacent to the electrode walls, the electrode walls are respectively provided with a battery cell positive electrode and a battery cell negative electrode which are connected with the battery cell body, and the heat exchange walls are made of heat conducting materials; and the heat exchange shell is buckled on the heat exchange wall, and a heat exchange cavity is formed between the heat exchange shell and the heat exchange wall. The battery module can comprehensively improve the cold and hot management efficiency and the energy density of the power battery.

Description

Battery module, battery pack and electric automobile
Technical Field
The application belongs to the technical field of new energy automobiles, and particularly relates to a battery module, a battery pack and an electric automobile.
Background
New energy automobiles will become the main vehicles in the future. For new energy automobiles, the service life, safety and energy density of the power battery are important directions of current researches. The service life of the power battery is reduced and the risk of safety failure is increased due to the fact that the working environment temperature of the power battery is too high or too low, however, in the related technology, the cold and heat management mode or the heat exchange efficiency of the power battery is low, the service life of the power battery is influenced, and safety risks exist; or the weight is increased greatly, the energy density of the power battery is reduced, and the endurance mileage of the whole vehicle is affected. How to simultaneously improve the heat and cold management efficiency and the energy density of the power battery has become a hot spot of current research.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The application aims to at least solve the technical problem of how to improve the cold and heat management efficiency and the energy density of the power battery at the same time to a certain extent. To this end, the application provides a battery module, battery package and electric automobile.
The embodiment of the application provides a battery module, battery module includes:
the battery cell comprises a battery cell body and a battery cell shell coated outside the battery cell body, wherein the battery cell shell comprises at least one electrode wall and a heat exchange wall adjacent to the electrode wall, the electrode wall is provided with a battery cell positive electrode and a battery cell negative electrode which are connected with the battery cell body, and the heat exchange wall is prepared from a heat conducting material; and, a step of, in the first embodiment,
the heat exchange shell is buckled on the heat exchange wall to form a heat exchange cavity between the heat exchange shell and the heat exchange wall.
In some embodiments, the battery cell casing comprises two electrode walls, the two electrode walls are oppositely located at two ends of the heat exchange casing, the heat exchange walls are respectively adjacent to the two electrode walls to form the battery cell casing, and the heat exchange casing is arranged on the outer side of the heat exchange walls in a surrounding mode.
In some embodiments, the heat exchange wall is made of a metallic material; the heat exchange shell is made of metal materials and is welded with the heat exchange wall.
In some embodiments, at least a side of the heat exchange housing adjacent to the heat exchange wall is provided with an insulating layer.
In some embodiments, the heat exchange housing is provided with a runner inlet and a runner outlet in communication with the heat exchange cavity.
In some embodiments, a flow guiding rib is arranged on one side of the heat exchange shell adjacent to the heat exchange wall, and divides the heat exchange cavity into a heat exchange flow passage communicated with the flow passage inlet and the flow passage outlet.
In some embodiments, there is a first spacing between the end of the heat exchange housing and the electrode wall, and the flow channel inlet and the flow channel outlet are disposed at the end of the heat exchange housing.
In some embodiments, the electrode walls are located at the top and/or bottom of the cell housing, and the flow channel inlet and the flow channel outlet are oppositely disposed at the top end of the heat exchange housing.
The embodiment of the application also provides a battery pack, which comprises:
the shell is provided with a through hole for passing through the pipeline; and, a step of, in the first embodiment,
the battery modules are arranged in the shell, and the heat exchange cavities of the battery modules are communicated in series and/or in parallel.
The embodiment of the application also provides an electric automobile, which comprises the battery pack.
The embodiment of the application has at least the following beneficial effects:
according to the battery module, the heat exchange shell is buckled on the heat exchange wall of the battery cell shell, the heat exchange cavity is formed between the heat exchange shell and the heat exchange wall, so that the battery cell shell is a part of the heat exchange cavity, the heat exchange wall of the battery cell shell can be directly contacted with a heat exchange medium in the heat exchange cavity, the heat exchange efficiency of the battery cell and the heat exchange medium is improved, meanwhile, the battery cell shell can be a part of the heat exchange cavity except for the electrode wall used for setting the positive electrode and the negative electrode of the motor, the heat exchange area of the battery cell is greatly increased, the heat exchange efficiency of the battery cell and the heat exchange medium is improved, and the aim of improving the heat management efficiency of the battery module is fulfilled; meanwhile, the heat exchange shell is buckled on the heat exchange wall of the battery cell shell, so that the influence on the whole volume and weight of the battery module is small, and the energy density of the battery module can be improved; that is, the battery module of the present application can comprehensively improve the heat and cold management efficiency and the energy density of the power battery. In addition, the battery cell anode and the battery cell cathode of the battery module can be positioned outside the heat exchange cavity and are not immersed by the heat exchange medium, so that the battery module can be conveniently matched, connected and maintained, and different battery pack design requirements are met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view showing a battery module according to an embodiment of the present application;
fig. 2 shows a front view of a battery module in an embodiment of the present application;
fig. 3 shows a top view of a battery module in an embodiment of the present application;
fig. 4 is a schematic structural view of a battery pack according to an embodiment of the present application;
fig. 5 is a schematic view showing the structure of a battery pack according to another embodiment of the present application.
Reference numerals:
1000. a battery module; 1010. a first battery module; 1020. a second battery module; 1030. a third battery module; 1040. a fourth battery module; 1050. a fifth battery module; 1060. a sixth battery module; 1070. a seventh battery module; 1080. an eighth battery module; 1090. a ninth battery module; 1100. a tenth battery module; 1110. an eleventh battery module; 1120. a twelfth battery module; 100. a cell housing; 110. an electrode wall; 120. a heat exchange wall; 200. a heat exchange housing; 210. a flow channel inlet; 220. a flow channel outlet; 300. a housing; 310. and a through hole.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:
the embodiment of the application provides a battery module, as shown in fig. 1 to 3, the battery module includes an electric core and a heat exchange shell. The battery cell comprises a battery cell body and a battery cell shell coated outside the battery cell body, wherein the battery cell shell comprises at least one electrode wall and a heat exchange wall adjacent to the electrode wall, the electrode wall is provided with a battery cell positive electrode and a battery cell negative electrode which are connected with the battery cell body, and the heat exchange wall is prepared from a heat conducting material; the heat exchange shell is buckled on the heat exchange wall to form a heat exchange cavity between the heat exchange shell and the heat exchange wall.
According to the battery module provided by the embodiment of the application, as shown in fig. 1 to 3, the heat exchange shell is buckled on the heat exchange wall of the battery core shell, a heat exchange cavity is formed between the heat exchange shell and the heat exchange wall, so that the battery core shell becomes a part of the heat exchange cavity, the heat exchange wall of the battery core shell is enabled to be in direct contact with a heat exchange medium in the heat exchange cavity, the heat exchange efficiency of the battery core and the heat exchange medium is improved, meanwhile, the battery core shell can become a part of the heat exchange cavity except for the electrode wall used for setting the positive electrode and the negative electrode of the motor, the heat exchange area of the battery core is greatly increased, the heat exchange efficiency of the battery core and the heat exchange medium is improved, and the aim of improving the heat management efficiency of the battery module is fulfilled; meanwhile, the heat exchange shell is buckled on the heat exchange wall of the battery cell shell, so that the influence on the whole volume and weight of the battery module is small, and the energy density of the battery module can be improved; that is, the battery module of the present application can comprehensively improve the heat and cold management efficiency and the energy density of the power battery. Meanwhile, the battery cell anode and the battery cell cathode of the battery module can be positioned outside the heat exchange cavity and are not immersed by the heat exchange medium, so that the battery module can be conveniently matched, connected and maintained, and different battery pack design requirements are met.
In the related art, for example, the liquid cooling plate and the battery core are respectively arranged at two opposite sides of the tray frame, on one hand, the liquid cooling plate can only exchange heat with the bottom of the battery core, so that the heat exchange area is smaller and the heat exchange efficiency is lower; on the other hand, the heat exchange medium is arranged in the liquid cooling plate, and the heat exchange medium cannot be in direct contact with the battery core for heat exchange, so that the heat exchange efficiency is low; in addition, the liquid cooling plate is in indirect contact with the battery core through the tray frame, so that the energy loss of a heat exchange medium in the liquid cooling plate is large, and the heat exchange efficiency is low. For another example, the battery core is completely immersed in the shell filled with the heat exchange medium, so that on one hand, the battery core needs to be completely immersed in the shell, so that the whole volume and weight of the battery module are relatively large, the energy density of the battery module is lowered, and the endurance mileage of the vehicle is reduced; on the other hand, the electrode part of the battery core is immersed in the cooling liquid at the same time, so that the electrode of the battery pack is inconvenient to connect and maintain with the electricity utilization module, and meanwhile, the risk of electric leakage and short circuit exists.
The battery module that this application embodiment provided, as shown in fig. 1 through 3, through detaining the heat transfer casing and establish on the heat transfer wall of electric core casing to form the heat transfer chamber between heat transfer wall and heat transfer casing, set up the heat transfer medium in the heat transfer chamber and can directly contact the electric core in order to directly exchange heat with the electric core. Compared with a battery cold and heat management mode that a liquid cooling plate and a battery core are respectively arranged on two opposite sides of a tray frame, the battery module provided by the embodiment of the application can greatly increase the contact area of the battery core and the heat exchange medium, and the battery core can directly contact with the heat exchange medium for heat exchange, so that the heat exchange mode of direct contact is realized, the energy loss of the heat exchange medium can be greatly reduced, the heat exchange efficiency of the battery core and the heat exchange medium is improved, and finally the purpose of improving the cold and heat management efficiency is achieved. Compared with a battery cold and hot management mode that a battery core is completely immersed in a shell filled with a heat exchange medium, the battery module provided by the embodiment of the application can reduce the volume of a heat exchange cavity so as to reduce the overall weight of the battery module and achieve the purposes of improving the energy density and the endurance mileage of the battery module; meanwhile, the electrodes of the battery module can be prevented from being immersed in the heat exchange medium, the electrodes can be conveniently connected and maintained, and meanwhile, the risk of electric leakage and short circuit of the electrodes can be avoided. That is, the battery module of this application designs the electric core casing as the part of heat transfer chamber to make the heat transfer medium that flows in the heat transfer chamber can with electric core direct contact, can reduce the energy loss of heat transfer medium in the heat transfer in-process to a great extent, increase the heat transfer area to a great extent when reducing the volume of heat transfer chamber to a great extent, under the same operating mode, can effectively improve battery module's cold and hot management efficiency, extension battery's life.
As an alternative embodiment, as shown in fig. 1 to 3, the electric core shell includes two electrode walls, the two electrode walls are oppositely located at two ends of the heat exchange shell, the heat exchange wall is respectively adjacent to the two electrode walls to form the electric core shell, and the heat exchange shell is enclosed on the outer side of the heat exchange wall.
In some embodiments, as shown in fig. 1 to 3, the cell housing includes two electrode walls, the electrode walls are used for setting a cell positive electrode and a cell negative electrode connected with the cell body, the cell positive electrode and the cell negative electrode can be simultaneously set on the same electrode wall, and the cell positive electrode and the cell negative electrode can also be respectively set on the two electrode walls.
In some embodiments, as shown in fig. 1-3, the cell housing includes a plurality of heat exchange walls that abut the electrode walls to form a complete cell housing, such that the cell housing is wrapped around the exterior of the cell body. Meanwhile, the heat exchange shell can also encircle the outer side of the ground heat exchange wall, so that a heat exchange cavity encircling the battery cell body is formed after the heat exchange shell is connected with the heat exchange wall, heat exchange media in the heat exchange cavity can encircle the outer side of the battery cell body and contact with the battery cell body for heat exchange, when the heat exchange media flow in the heat exchange cavity, the heat exchange media can encircle the battery cell body for flow, the heat exchange path of the heat exchange media and the battery cell body is prolonged, and the heat exchange efficiency is improved.
In some embodiments, the cell housing may be a cuboid, cylinder, or other three-dimensional structure. Accordingly, in order to form a closed heat exchange cavity after the heat exchange shell can be connected with the heat exchange wall of the battery shell, the structure of the heat exchange shell needs to be adapted to that of the battery cell shell. In other embodiments, the cell housing may also be a flexible, soft-pack structure.
For example, as shown in fig. 1 to 3, the structure of the electric core shell is a cuboid, correspondingly, the whole heat exchange shell is of a cuboid structure with the cross section slightly larger than that of the electric core shell, the middle part of the heat exchange shell is hollowed out to be sleeved on the heat exchange wall of the electric core shell, and meanwhile, the side wall of the heat exchange shell is in sealing connection with the heat exchange wall of the electric core shell, so that a sealed heat exchange cavity can be formed between the heat exchange wall and the heat exchange shell.
For another example, the structure of the battery cell shell is a cylinder, the heat exchange wall of the battery cell shell is a side surface of the cylinder, and the electrode wall of the battery cell shell is a bottom surface of the cylinder. Correspondingly, the whole heat exchange shell is of a cylinder structure with the cross section slightly larger than that of the battery cell shell, the middle shaft part of the heat exchange shell is hollowed out to be sleeved on the heat exchange wall of the battery cell shell, and meanwhile, the two bottom surfaces of the heat exchange shell respectively encircle the heat exchange wall of the battery cell shell and are in sealing connection with the heat exchange wall of the battery cell shell so as to form a sealed heat exchange cavity between the heat exchange wall and the heat exchange shell.
As an alternative embodiment, the heat exchange wall is made of a metallic material; the heat exchange shell is made of metal materials and is welded with the heat exchange wall.
In some embodiments, as shown in fig. 1 to 3, the heat exchange wall is a metal heat exchange wall made of a metal material, and the metal heat exchange wall not only has excellent heat conduction performance, but also has better structural strength, can keep the three-dimensional structure of the battery cell shell, and has a certain explosion-proof function. In some embodiments, the metal material from which the heat exchange wall is made may be aluminum or steel.
In some embodiments, the heat exchange shell is a metal heat exchange shell made of metal materials, and has relatively good heat conduction performance and relatively strong structural strength, so that the shape of a heat exchange cavity formed by the heat exchange shell and the heat exchange wall can be maintained, and a stable and reliable cooling path can be formed in the heat exchange cavity by the heat exchange medium. In some embodiments, the metal material from which the heat exchange housing is made may be aluminum or steel.
In some embodiments, the heat exchange shell and the heat exchange wall can be connected through welding, the connection between the heat exchange shell and the heat exchange wall can be sealed reliably through welding, the tightness of a heat exchange cavity formed by the heat exchange shell and the heat exchange wall can be improved, and heat exchange medium in the heat exchange cavity is prevented from leaking.
As an alternative embodiment, at least the side of the heat exchange housing adjacent to the heat exchange wall is provided with an insulating layer.
In some embodiments, the heat exchange shell surrounds the heat exchange wall of the battery cell shell, and in order to ensure insulation safety between the battery cells, at least one side of the heat exchange shell adjacent to the heat exchange wall is provided with an insulation layer so as to insulate between the heat exchange shell and the heat exchange wall. For example, a layer of insulating material may be sprayed or glued on the side of the heat exchange housing adjacent to the heat exchange wall.
In some embodiments, an insulating layer may be further disposed on a side of the heat exchange housing away from the heat exchange wall, for example, an insulating material layer is sprayed or pasted on a side of the heat exchange housing away from the heat exchange wall, so as to improve insulating performance of the heat exchange housing, thereby ensuring insulation safety between the electric cores.
As an alternative embodiment, as shown in fig. 1 to 3, a flow channel inlet and a flow channel outlet which are communicated with the heat exchange cavity are formed on the heat exchange shell.
In some embodiments, as shown in fig. 1 to 3, a runner inlet and a runner outlet which are communicated with the heat exchange cavity are formed on the heat exchange shell, so that the heat exchange cavity can be communicated with a heat dissipation device of the heat exchange medium, a path which can circulate is formed between the heat exchange cavity and the heat dissipation device of the heat exchange medium, and the heat exchange medium can enter the heat dissipation device to dissipate heat and cool after cooling the battery cell in the heat exchange cavity, so that the heat exchange medium can continuously exchange heat and cool the battery cell after dissipating heat and cooling. In addition, the plurality of battery modules can be communicated through the runner inlet and the runner outlet, so that after the plurality of battery modules are assembled into a battery pack, the heat exchange cavities among the battery modules can be communicated, and therefore the battery modules can be synchronously subjected to cold and heat management.
In some embodiments, the inlet/outlet of the flow channel can be communicated with the heat dissipating device of the heat exchange medium through a pipeline, and insulating materials are sprayed or stuck on the surface of the pipeline to ensure the insulation safety between the electric cores.
As an alternative implementation mode, a flow guiding rib is arranged on one side, adjacent to the heat exchange wall, of the heat exchange shell, and divides the heat exchange cavity into a heat exchange runner which is communicated with the runner inlet and the runner outlet.
In some embodiments, the heat exchange cavity is divided into the heat exchange flow channels communicating the flow channel inlet and the flow channel outlet by the flow guide ribs by arranging the flow guide ribs on one side of the heat exchange shell adjacent to the heat exchange wall, namely, the heat exchange flow channels with a certain guiding effect on the heat exchange medium in the heat exchange cavity outside the heat exchange wall, so that the heat exchange medium can flow directionally in the heat exchange flow channels, the heat exchange medium can uniformly pass through the heat exchange cavity, the heat exchange dead angle in the heat exchange cavity is avoided, and the heat exchange medium can not participate in flowing heat exchange in the heat exchange dead angle accumulation.
In some embodiments, optionally, the heat exchange channels formed by the flow guide ribs are arranged in a zigzag shape on the outer side of the heat exchange wall, and the heat exchange channels can be spread over the heat exchange walls corresponding to the heat exchange cavities, so that when the heat exchange medium flows in the heat exchange channels, the heat exchange medium can flow through all the heat exchange walls corresponding to the heat exchange cavities, so that a larger heat exchange area is kept between the heat exchange medium and the heat exchange walls, and the heat exchange efficiency between the heat exchange medium and the heat exchange walls is ensured.
As an alternative embodiment, as shown in fig. 1 to 3, the end of the heat exchange housing and the electrode wall have a first spacing therebetween, and the flow channel inlet and the flow channel outlet are provided at the end of the heat exchange housing.
In some embodiments, as shown in fig. 1 to 3, a first space is reserved between the end of the heat exchange shell and the electrode wall, that is, a certain space is reserved between the end of the heat exchange shell and the electrode wall, so that a plurality of arrangement modes can be provided for the battery cell anode and the battery cell cathode, the battery cell anode and the battery cell cathode can be respectively arranged on the two electrode walls, and the battery cell anode and the battery cell cathode can be simultaneously arranged on the same electrode wall, so that the battery cell anode and the battery cell cathode between the two battery modules can be randomly matched, and the design requirements of different battery packs can be conveniently met.
In some embodiments, as shown in fig. 1 to 3, the flow channel inlet and the flow channel outlet are arranged at the end part of the heat exchange shell, on one hand, a first space is reserved between the end part of the heat exchange shell and the electrode wall, and the arrangement space of the battery cell anode and the battery cell cathode on the electrode wall is not affected by the arrangement of the flow channel inlet and the flow channel outlet at the end part of the heat exchange shell; on the other hand, a certain space is reserved between the end part of the heat exchange shell and the electrode wall, and the communication of the runner inlet or the runner outlet between the two battery modules can be facilitated.
As an alternative embodiment, as shown in fig. 1 to 3, the electrode walls are located at the top and/or bottom of the cell housing, and the flow channel inlet and the flow channel outlet are oppositely disposed at the top end of the heat exchange housing.
In some embodiments, as shown in fig. 1 to 3, the electrode wall is located at the top and/or bottom of the battery cell casing, so that the battery cell positive electrode is disposed at the top and/or bottom of the battery cell casing, and the battery cell negative electrode is disposed at the top and/or bottom of the battery cell casing, so that the battery cell positive electrode and the battery cell negative electrode have multiple setting modes, and the setting positions of the battery cell positive electrode and the battery cell negative electrode can be adjusted according to the connection positions and the connection modes between the two battery modules, so as to meet different battery pack design requirements.
In some embodiments, as shown in fig. 1 to 3, the runner inlet and the runner outlet may be relatively disposed at the top end of the heat exchange housing, on the one hand, the runner inlet and the runner outlet may be disposed at the top end of the heat exchange housing, on the other hand, the communication and assembly of the runner inlet and the runner outlet may be facilitated, and on the other hand, the reliability of the communication of the heat exchange cavity between the two battery modules may be ensured, so that the risk of leakage of the heat exchange medium due to poor tightness of the communication of the runner inlet and the runner outlet is avoided.
In some embodiments, as shown in fig. 1 to 3, the cell housing has a rectangular parallelepiped structure, electrode walls are respectively disposed at the top and bottom of the cell housing, and four heat exchange walls are respectively disposed on four walls of the cell housing. That is, the cell housing is composed of two electrode walls and four heat exchange walls. The heat exchange shell surrounds the outer sides of the four heat exchange walls to form a closed heat exchange cavity between the four heat exchange walls and the heat exchange shell, so that the heat exchange cavity surrounds the periphery of the battery core, the heat exchange area of the heat exchange cavity formed by the four heat exchange walls is large, and the heat exchange efficiency of the battery module can be greatly improved.
Based on the same inventive concept, the embodiment of the present application also provides a battery pack, as shown in fig. 4 and 5, including a case and a plurality of the above battery modules. Wherein, the shell is provided with a through hole for passing through the pipeline; the battery module is arranged in the shell, and heat exchange cavities of the battery modules are communicated in series and/or in parallel.
The battery pack provided by the invention comprises the battery module of the technical scheme, so that the battery pack provided by the invention has all the beneficial effects of the battery module, and the details are not repeated here.
In some embodiments, as shown in fig. 4 and 5, the battery pack may include a plurality of battery modules, and the plurality of battery modules may communicate with the flow channel inlet and the flow channel outlet of the battery module in a serial manner or in a parallel manner through the pipes, so that the heat exchange medium may sequentially flow through the heat exchange cavities of the plurality of battery modules or simultaneously flow through the heat exchange cavities of the plurality of battery modules, so as to cool the plurality of battery modules in the battery pack. In the battery pack, a plurality of battery modules are provided in the housing, and the plurality of battery modules are integrated into the battery pack through the housing, while the battery modules provided in the housing and the pipes communicating the plurality of battery modules can be also protected. In addition, can offer the through-hole on the shell, through can supplying the pipeline to pass through, the heat transfer cavity of battery module on one side can be through pipeline and heat transfer medium's heat abstractor intercommunication to heat transfer medium can circulate and flow between heat transfer cavity and heat abstractor.
In some embodiments, taking fig. 4 as an example, the battery pack may be provided with six battery modules, which may be respectively referred to as a first battery module, a second battery module, a third battery module, a fourth battery module, a fifth battery module and a sixth battery module, and the six battery modules may be divided into three groups, where the first battery module and the second battery module are one group, the third battery module and the fourth battery module are one group, and the fifth battery module and the sixth battery module are one group. In one group of battery modules, the flow channel outlet of one battery module is communicated with the flow channel inlet of the other battery module through a pipeline, that is, the flow channel outlet of the first battery module is communicated with the flow channel inlet of the second battery module through a pipeline, the flow channel outlet of the third battery module is communicated with the flow channel inlet of the fourth battery module through a pipeline, and the flow channel outlet of the fifth battery module is communicated with the flow channel inlet of the sixth battery module through a pipeline, that is, the heat exchange cavities between two battery modules in the three groups of battery modules are respectively connected in series. Meanwhile, the runner inlets of the first battery module, the third battery module and the fifth battery module are also communicated with the heat-exchange medium heat dissipation device in parallel, and the runner outlets of the second battery module, the fourth battery film and the sixth battery module are also communicated with the heat-exchange medium heat dissipation device in parallel, so that a communication structure with three groups of battery modules in parallel is formed. The runner inlets of the first battery module, the third battery module and the fifth battery module are also communicated with the heat dissipation device of the heat exchange medium in parallel, so that the heat dissipation medium subjected to heat dissipation and temperature reduction by the heat dissipation device can enter the first battery module, the third battery module and the fifth battery module respectively and then enter the second battery module, the fourth battery film and the sixth battery module respectively through pipelines; meanwhile, the flow channel outlets of the second battery module, the fourth battery film and the sixth battery module are also communicated with the heat dissipation device of the heat exchange medium in parallel, so that the heat exchange medium subjected to heat exchange and heat absorption through the heat exchange cavity returns to the heat dissipation device of the heat exchange medium, and heat dissipation and temperature reduction are performed through the heat dissipation device. The circulation is carried out, so that the circulation heat reduction of the battery pack is realized.
In some embodiments, taking fig. 5 as an example, the battery pack may be provided with six battery modules, which may be respectively referred to as a seventh battery module, an eighth battery module, a ninth battery module, a tenth battery module, an eleventh battery module, and a twelfth battery module, and the six battery modules may be sequentially connected in series. That is, the flow channel outlet of the seventh battery module is communicated with the flow channel inlet of the eighth battery module through a pipeline, the flow channel outlet of the eighth battery module is communicated with the flow channel inlet of the ninth battery module through a pipeline, the flow channel outlet of the ninth battery module is communicated with the flow channel inlet of the eleventh battery module through a pipeline, the flow channel outlet of the eleventh battery module is communicated with the flow channel inlet of the twelfth battery module through a pipeline, and meanwhile, the flow channel inlet of the seventh battery module is communicated with the outlet of the heat exchange medium heat dissipation device, the flow channel outlet of the twelfth battery module is communicated with the inlet of the heat exchange medium heat dissipation device, so that a circulating heat exchange medium circulation path is formed by sequentially connecting the flow channel outlets of the seventh battery module, the eighth battery module, the ninth battery module, the tenth battery module, the eleventh battery module and the heat exchange medium in series. The heat exchange medium which passes through the heat exchange device of the heat exchange medium and dissipates heat flows through the heat exchange cavities of the seventh battery module, the eighth battery module, the ninth battery module, the tenth battery module, the eleventh battery module and the twelfth battery module in sequence, and then circulates back to the heat exchange device of the heat exchange medium to dissipate heat and cool. The circulation is carried out, so that the circulation heat reduction of the battery pack is realized.
In some embodiments, the heat exchange medium may be ethylene glycol. The ethylene glycol is used as a heat exchange medium, and has the advantages of large cold carrying capacity, low freezing point, low corrosion to equipment and low harm to environmental and human bodies.
Based on the same inventive concept, the embodiment of the application also provides an electric automobile, which comprises the battery module or the battery pack.
The electric automobile provided by the invention comprises the battery module or the battery pack in the technical scheme, so that the electric automobile provided by the invention has all the beneficial effects of the battery module or the battery pack, and the details are not repeated here.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate or positional relationships are based on the positional relationships shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements 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 application.
The description herein as relating to "first," "second," etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance thereof or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery module, characterized in that the battery module comprises:
the battery cell comprises a battery cell body and a battery cell shell coated outside the battery cell body, wherein the battery cell shell comprises at least one electrode wall and a heat exchange wall adjacent to the electrode wall, the electrode wall is provided with a battery cell positive electrode and a battery cell negative electrode which are connected with the battery cell body, and the heat exchange wall is prepared from a heat conducting material; and, a step of, in the first embodiment,
the heat exchange shell is buckled on the heat exchange wall to form a heat exchange cavity between the heat exchange shell and the heat exchange wall.
2. The battery module according to claim 1, wherein the cell case includes two electrode walls, the two electrode walls being oppositely disposed at both ends of the heat exchange case, the heat exchange wall being respectively adjacent to the two electrode walls to form the cell case, the heat exchange case being enclosed outside the heat exchange wall.
3. The battery module according to claim 1, wherein the heat exchange wall is made of a metal material; the heat exchange shell is made of metal materials and is welded with the heat exchange wall.
4. A battery module according to claim 3, wherein at least one side of the heat exchange housing adjacent to the heat exchange wall is provided with an insulating layer.
5. The battery module according to any one of claims 1 to 4, wherein the heat exchange housing is provided with a flow passage inlet and a flow passage outlet which are communicated with the heat exchange chamber.
6. The battery module of claim 5, wherein a side of the heat exchange housing adjacent to the heat exchange wall is provided with a flow guide rib that separates the heat exchange cavity into a heat exchange flow passage that communicates with the flow passage inlet and the flow passage outlet.
7. The battery module of claim 5, wherein the end of the heat exchange housing is spaced from the electrode wall by a first distance, and the flow channel inlet and the flow channel outlet are disposed at the end of the heat exchange housing.
8. The battery module of claim 7, wherein the electrode walls are positioned at the top and/or bottom of the cell housing, and the flow channel inlet and the flow channel outlet are oppositely disposed at the top end of the heat exchange housing.
9. A battery pack, the battery pack comprising:
the shell is provided with a through hole for passing through the pipeline; and, a step of, in the first embodiment,
a plurality of battery modules according to any one of claims 1 to 8, which are disposed in the housing, and the heat exchange chambers of the plurality of battery modules are connected in series and/or in parallel.
10. An electric vehicle comprising the battery pack of claim 9.
CN202311356501.9A 2023-10-18 2023-10-18 Battery module, battery pack and electric automobile Pending CN117438695A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311356501.9A CN117438695A (en) 2023-10-18 2023-10-18 Battery module, battery pack and electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311356501.9A CN117438695A (en) 2023-10-18 2023-10-18 Battery module, battery pack and electric automobile

Publications (1)

Publication Number Publication Date
CN117438695A true CN117438695A (en) 2024-01-23

Family

ID=89547312

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311356501.9A Pending CN117438695A (en) 2023-10-18 2023-10-18 Battery module, battery pack and electric automobile

Country Status (1)

Country Link
CN (1) CN117438695A (en)

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