CN116722291A - Combined shell of battery module, battery module and battery pack - Google Patents

Combined shell of battery module, battery module and battery pack Download PDF

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Publication number
CN116722291A
CN116722291A CN202310927125.8A CN202310927125A CN116722291A CN 116722291 A CN116722291 A CN 116722291A CN 202310927125 A CN202310927125 A CN 202310927125A CN 116722291 A CN116722291 A CN 116722291A
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CN
China
Prior art keywords
liquid
battery
cell
battery module
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
CN202310927125.8A
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Chinese (zh)
Inventor
吴志鹏
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.)
Chuneng New Energy Co Ltd
Original Assignee
Chuneng New Energy 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 Chuneng New Energy Co Ltd filed Critical Chuneng New Energy Co Ltd
Priority to CN202310927125.8A priority Critical patent/CN116722291A/en
Publication of CN116722291A publication Critical patent/CN116722291A/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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • 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
    • H01M50/20—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 embodiment of the invention provides a combined shell of a battery module, the battery module and a battery pack. The combined shell of the battery module comprises a plurality of battery cell shells. Each battery cell shell comprises an outer shell and an inner shell arranged in the outer shell, the inner shell is provided with an accommodating cavity capable of accommodating a battery cell, a cooling liquid cavity is formed in a space between the outer shell and the inner shell, the cooling liquid cavity comprises a first current collecting channel, a second current collecting channel and a liquid cooling main channel, the liquid cooling main channel extends along a first direction, the first current collecting channel and the second current collecting channel are relatively communicated with two ends of the extending direction of the liquid cooling main channel in the first direction, and the first current collecting channel of one battery cell shell is communicated with the second current collecting channel of the adjacent battery cell shell. Therefore, the combined shell of the battery module not only improves the heat dissipation efficiency and the safety of the battery module, but also is beneficial to improving the battery capacity of the battery module.

Description

Combined shell of battery module, battery module and battery pack
Technical Field
The invention relates to the technical field of batteries, in particular to a combined shell of a battery module, a battery module with the combined shell of the battery module and a battery pack.
Background
The battery cooling mode mainly comprises air cooling and liquid cooling. The liquid cooling heat management system has good heat dissipation performance due to high heat conductivity coefficient of the liquid medium, and has the defects of complex heat dissipation structure, difficult maintenance, inflexible battery grouping and the like.
In the related art, the column-type battery module mainly realizes liquid cooling heat dissipation through the form of integral liquid cooling pipeline and liquid cooling plate, namely sets up liquid cooling pipeline and liquid cooling plate between a plurality of electric cores, and this kind of mode is not only limited to the heat dispersion who lies in inside electric core, still causes the problem that the difference in temperature between battery monomer and the battery monomer and battery monomer is big itself.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, an embodiment of the present invention proposes a combination case of a battery module. The combined shell of the battery module improves the heat dissipation efficiency and the safety of the battery module.
The embodiment of the invention also provides a battery module.
The embodiment of the invention also provides a battery pack.
The combined shell of the battery module comprises a plurality of battery cell shells.
Each battery cell shell comprises an outer shell and an inner shell arranged in the outer shell, the inner shell is provided with an accommodating cavity capable of accommodating a battery cell, a cooling liquid cavity is formed in a space between the outer shell and the inner shell, the cooling liquid cavity comprises a first current collecting channel, a second current collecting channel and a liquid cooling main channel, the liquid cooling main channel extends along a first direction, the first current collecting channel and the second current collecting channel are relatively communicated with two ends of the extending direction of the liquid cooling main channel in the first direction, and the first current collecting channel of one battery cell shell is communicated with the second current collecting channel of the adjacent battery cell shell.
According to the combined shell of the battery module, the cooling liquid cavity is formed on the self structure of the battery cell shell (the space between the outer shell of the battery cell shell and the inner shell forms the cooling liquid cavity), and cooling liquid can flow in the cooling liquid cavity to cool the battery cells in the battery module, so that the situation that a liquid cooling plate is additionally arranged outside the bare battery cells can be avoided, the occupied space of the battery cells is reduced, and the space utilization rate of the battery module is improved. The battery cell shell heat dissipation device can avoid the problem of low heat dissipation efficiency of the battery cell shell caused by the fact that the cold pipeline and the liquid cooling plate are arranged on the outer side of the battery cell shell, and avoid the problem that a battery pack is invalid due to the fact that a plurality of connectors exist in a mode of a liquid cooling pipe loop and cooling liquid is easy to leak. Therefore, the combined shell of the battery module has the advantages of high heat dissipation efficiency and high safety.
In addition, the combined shell of the battery module further improves the heat dissipation efficiency of the battery module by arranging the liquid cooling main channel on the side wall (at least two side surfaces) of the battery cell shell.
Therefore, the combined shell of the battery module has the advantages of high heat dissipation efficiency and high safety performance of the battery module.
In some embodiments, the cell housing has adjacent first and second sides, the first side having an area greater than an area of the second side, the liquid-cooled main channel being disposed on the first side.
In some embodiments, the combined case of the battery module further includes a liquid barrier disposed in the liquid cooling main duct so as to divide the liquid cooling main duct into a plurality of liquid cooling branches extending in the first direction, the plurality of liquid cooling branches being disposed at intervals in a second direction, the second direction being disposed perpendicular to the first direction.
In some embodiments, the plurality of cell shells are arranged in rows sequentially along the first direction to form cell rows, the plurality of cell shells of each cell row are arranged in a head-to-tail opposite manner along the first direction, and the first current collecting channels of two adjacent cell shells are communicated with the second current collecting channels of the adjacent cell shells.
In some embodiments, the combined casing of the battery module further includes a limiting member, the plurality of battery cell casings are arranged in a column to form a battery cell column, the battery cell column has a plurality of columns, and a part of the limiting member is spaced between two adjacent battery cell columns.
In some embodiments, the limiting member includes a limiting partition, a plurality of connecting portions, and a plurality of limiting protrusions, the plurality of connecting portions and the plurality of limiting protrusions are alternately disposed on the limiting partition at intervals along a third direction, the limiting protrusions extend along a second direction, the end portion of the casing of one of the battery cell rows is communicated with the end portion of the casing of the other of the battery cell rows through the connecting portions, the adjacent battery cell rows are limited through the limiting protrusions, and the third direction is perpendicular to both the first direction and the second direction.
In some embodiments, the corner of the casing is provided with an avoidance portion, the avoidance portions of the casings of two adjacent battery cell rows form the limit groove, and at least a part of the limit protrusion is arranged in the limit groove in a penetrating manner to form a mortise and tenon structure;
in some embodiments, the limit projection includes a guide portion having a wedge shape disposed at one end of the limit projection.
In some embodiments, the limiting separator is provided with a connecting hole, the connecting part is a through plug, the through plug is arranged on the connecting hole in a penetrating way, and the through plug is connected between the cooling liquid cavities of the two adjacent battery cell shells.
The battery module provided by the embodiment of the invention comprises a plurality of electric cells and the combined shell of the battery module according to any one of the above, wherein the electric cells are arranged in the combined shell of the battery module.
In some embodiments, the plurality of the electric cells are sequentially arranged along the first direction, and two adjacent electric cells are arranged in series.
The battery pack of the embodiment of the invention can comprise a battery box and the battery module according to the embodiment of the invention, wherein the battery module is arranged in the battery box.
In some embodiments, the side wall of the battery box is provided with a first liquid cooling cavity and a second liquid cooling cavity which are oppositely arranged along the first direction, and the first liquid cooling cavity, the first collecting channel, the liquid cooling main channel, the second collecting channel and the second liquid cooling cavity are sequentially communicated so as to form a cooling liquid passage.
In some embodiments, the battery box comprises an outer box body, a liquid inlet component and a liquid return component, wherein the liquid inlet component and the liquid return component are oppositely arranged between the outer box body and the battery module along the first direction, the liquid inlet component is provided with a first liquid cooling cavity, and the liquid return component is provided with a second liquid cooling cavity.
In some embodiments, the battery module has a plurality of cell columns, the liquid inlet assembly includes a main liquid inlet pipe and a plurality of auxiliary liquid inlet pipes which are connected, the auxiliary liquid inlet pipes are arranged at intervals along a third direction, and the auxiliary liquid inlet pipes are communicated with the cooling liquid pipes of the cell shells in the cell columns; the liquid return assembly comprises a main return pipe and a plurality of auxiliary return pipes, wherein the auxiliary return pipes are arranged at intervals along a third direction, and the auxiliary return pipes are communicated with the cooling liquid pipes of the cell shells in the cell array.
In some embodiments, each of the liquid inlet assembly and the liquid return assembly is integrally formed or welded with the outer housing.
In some embodiments, the main liquid inlet pipe and the plurality of auxiliary liquid inlet pipes are all in a flat tubular shape, and the main return pipe and the plurality of auxiliary return pipes are all in a flat tubular shape.
In some embodiments, each of the liquid inlet assembly and the liquid return assembly is spaced from the outer housing in an inward-outward direction so as to form an insulating cavity.
Drawings
Fig. 1 is a perspective view of a battery pack according to an embodiment of the present invention.
Fig. 2 is a front view of a battery pack according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view along A-A of fig. 2.
Fig. 4 is an enlarged view of fig. 3 at C.
Fig. 5 is a cross-sectional view of fig. 2 taken along B-B.
Fig. 6 is a perspective view of a battery pack according to an embodiment of the present invention, with an outer case omitted.
Fig. 7 is an enlarged view of fig. 6 at B.
Fig. 8 is a perspective view of a stop member according to an embodiment of the present invention.
Fig. 9 is an enlarged view of fig. 8 at D.
Fig. 10 is an enlarged view of fig. 8 at E.
Fig. 11 is another perspective view of a limiter according to an embodiment of the present invention.
Fig. 12 is an enlarged view of fig. 11 at E.
Fig. 13 is a perspective view of a fluid intake assembly according to an embodiment of the invention.
Fig. 14 is another perspective view of a fluid intake assembly according to an embodiment of the invention.
Fig. 15 is an enlarged view of fig. 14 at G.
Fig. 16 is a perspective view of a cell array according to an embodiment of the present invention.
Fig. 17 is a perspective view of a cell housing according to an embodiment of the present invention.
Fig. 18 is another perspective view of a cell housing according to an embodiment of the present invention.
Fig. 19 is a top view of a cell housing according to an embodiment of the present invention.
Fig. 20 is a cross-sectional view taken along H-H of fig. 19.
Reference numerals:
a battery pack 1000;
a battery module 100; a battery case 200;
a combination case 10;
a housing 1; an avoidance unit 11; a first side 12; a second side 13;
an inner case 2;
a cooling liquid chamber 3; a first collecting channel 31; a second collecting channel 32; a liquid cooling main channel 33; liquid cooling lane 331;
a liquid separation plate 4;
a limiting piece 5; a limiting separator 51; bolt holes 511;
a connecting portion 52; a limit projection 53; a guide 531;
an outer case 6;
a liquid inlet assembly 71; a main liquid inlet pipe 711; a secondary liquid inlet pipe 712;
a liquid return assembly 72;
and an insulating chamber 8.
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.
The pack case 10, the battery module 100, and the battery pack 1000 of the battery module according to the embodiment of the present invention are described below with reference to fig. 1 to 19.
The pack case 10 of the battery module according to the embodiment of the present invention includes a plurality of battery cell cases.
Each of the battery cell housings includes an outer housing 1 and an inner housing 2 provided in the outer housing 1, the inner housing 2 has a housing chamber capable of housing the battery cell, a space between the outer housing 1 and the inner housing 2 forms a cooling liquid chamber 3, the cooling liquid chamber 3 includes a first collecting channel 31, a second collecting channel 32, and a liquid cooling main channel 33, the liquid cooling main channel 33 extends in a first direction (for example, a direction indicated by an arrow in fig. 3 and a front-rear direction shown in fig. 15), the first collecting channel 31 and the second collecting channel 32 are relatively communicated at both ends of the extending direction of the liquid cooling main channel 33 in the first direction, and the first collecting channel 31 of one of the battery cell housings is communicated with the second collecting channel 32 of its neighboring battery cell housing. It is understood that the first collecting channel, the second collecting channel and the liquid cooling main channel are all formed by an outer shell and an inner shell arranged in the outer shell; the liquid cooling main channel, the first collecting channel and the second collecting channel are formed on the side surface of the combined shell.
According to the combined shell 10 of the battery module, the cooling liquid cavity 3 is formed on the self structure of the battery cell shell (the space between the outer shell 1 and the inner shell 2 of the battery cell shell forms the cooling liquid cavity 3), and cooling liquid can flow in the cooling liquid cavity 3 to cool the battery cells in the battery module, so that the situation that a liquid cooling plate is additionally arranged outside the bare battery cells can be avoided, the occupied space of the battery cells is reduced, and the space utilization rate of the battery module 100 is improved.
Meanwhile, the cooling liquid cavity 3 is formed in the space between the outer shell 1 and the inner shell 2 of the battery cell shell, so that the problem of low heat dissipation efficiency of the battery cell shell caused by the arrangement of a cold pipeline and a liquid cooling plate outside the battery cell shell can be avoided, and the problems that a plurality of connectors exist in a mode of a liquid cooling pipe loop, and the battery pack 1000 is invalid due to leakage of cooling liquid are avoided. Thus, the combined case 10 of the battery module according to the embodiment of the present invention has advantages of high heat dissipation efficiency and safety.
In addition, the combined case 10 of the battery module according to the embodiment of the present invention further improves the heat dissipation efficiency of the battery module 100 by disposing the liquid cooling main channel 33 on the side walls (at least two sides) of the battery cell case.
Therefore, the pack case 10 of the battery module according to the embodiment of the present invention has the advantage of high heat dissipation efficiency and safety performance of the battery module 100.
For example, the outer case 1 and the inner case 2 may be connected by laser welding, so that the structural strength of the battery cell case may be improved and the sealability of the battery cell case may be ensured.
Alternatively, the outer shell 1 and the inner shell 2 may be aluminum alloy shells or thin steel shells.
As shown in fig. 6, the cell casing has a first side 12 and a second side 13 adjacent to each other, the area of the first side 12 is larger than the area of the second side 13, and the liquid cooling main channel 33 is disposed on the first side 12.
In the combined case 10 of the battery module according to the embodiment of the invention, the liquid cooling main channel 33 is disposed on the first side 12 by the area of the first side 12 being larger than the area of the second side 13, that is, the heat exchange area between the battery cells is increased. Therefore, the combined shell 10 of the battery module is beneficial to improving the heat dissipation effect of the battery cells.
For example, as shown in fig. 20, the left and right sides of the cell case are provided with liquid cooling main channels 33. Therefore, the combined shell 10 of the battery module further improves the heat dissipation effect of the battery cell.
As shown in fig. 20, the pack case 10 of the battery module further includes a liquid-blocking plate 4 provided in the liquid-cooling main passage 33 so as to partition the liquid-cooling main passage 33 into a plurality of liquid-cooling sub passages 331 extending in a first direction, the plurality of liquid-cooling sub passages 331 being provided at intervals in a second direction (up-down direction shown in fig. 20), the second direction being provided perpendicular to the first direction.
Because the battery module 100 is generally required to be laid flat in order to increase space utilization when in use. For example, the battery pack 1000 with the battery module 100 is laid flat and mounted on the chassis, so that the energy density of the battery pack 1000 can be increased and the height space can be saved. However, the battery module 100 laid in a flat manner has a problem of uneven heat dissipation, because the cooling liquid is concentrated on one side of the battery cell under the action of gravity, so that the cooling liquid on the other side of the battery cell is little, and the local temperature of the battery cell is too high. In the combined case 10 of the battery module according to the embodiment of the invention, the uniformity of the distribution of the cooling liquid can be improved by dividing the liquid cooling main passage 33 into the plurality of liquid cooling sub-passages 331 extending in the first direction. Therefore, the combined shell 10 of the battery module according to the embodiment of the invention has the advantage of avoiding the problem of overhigh local temperature caused by poor heat dissipation uniformity of the combined shell, thereby being beneficial to improving the cooling effect of the combined shell.
Alternatively, the width of the liquid cooling lanes 331 may be set between 1mm and 20mm.
As shown in fig. 6, the plurality of cell cases are arranged in a row in order along a first direction (e.g., the front-to-rear direction shown in fig. 6) to form cell rows, the plurality of cell cases of each cell row (e.g., the front-to-rear direction shown in fig. 6) are arranged end-to-end in the first direction, and the first current collector 31 of two adjacent cell cases communicates with the second current collector 32 of the adjacent cell case.
According to the combined shell 10 of the battery module, the plurality of battery cell shells are sequentially arranged in rows along the first direction to form the battery cell rows, the plurality of battery cell shells of each battery cell row are arranged in a head-to-tail opposite mode along the first direction, and the first current collecting channels 31 of two adjacent battery cell shells are communicated with the second current collecting channels 32 of the adjacent battery cell shells, so that the arrangement mode of the battery cells is optimized, the difficulty in arrangement of the battery cells is reduced, and the circulation efficiency of cooling liquid is further improved.
As shown in fig. 6 and 8 to 12, the combined casing 10 of the battery module according to the embodiment of the invention further includes a plurality of limiting members 5, and the plurality of battery cell casings are arranged in a row to form a battery cell row, and the battery cell row has a plurality of rows, and a portion of the limiting members 5 is spaced between two adjacent battery cell rows (for example, in the left-right direction shown in fig. 6).
The combined shell 10 of the battery module of the embodiment of the invention is further beneficial to simultaneously connecting and limiting a plurality of battery cell shells through the limiting piece 5 by the limiting piece 5. Thereby, the connection stability of the combined shell is improved. On the other hand, the combined shell 10 of the battery module provided by the embodiment of the invention can improve the structural strength of the battery module 100 with the combined shell by arranging the limiting piece 5, reduce the shaking amplitude of the battery core and is beneficial to prolonging the service life of the battery module 100.
In addition, the electric core shell is limited by the limiting piece 5, so that glue coating at the bottom of the battery box 200 is not needed, and a large amount of materials and cost are saved. Meanwhile, the detachable plastic bottle has the advantage of convenient disassembly.
As shown in fig. 8 to 12, the stopper 5 includes a stopper spacer 51, a plurality of connecting portions 52, and a plurality of stopper protrusions 53, the plurality of connecting portions 52 being provided on the stopper spacer 51 at intervals and alternately in a third direction (for example, the left-right direction shown in fig. 6) with the plurality of stopper protrusions 53, the stopper protrusions 53 extending in a second direction (for example, the up-down direction shown in fig. 6), the end of the case 1 of one cell row being in communication with the end of the case 1 of the other cell row thereof through the connecting portions 52, the adjacent cell rows being restricted by the stopper protrusions 53, the third direction being perpendicular to both the first direction (for example, the front-rear direction shown in fig. 9) and the second direction.
According to the combined shell 10 of the battery module, the limiting piece 5 is divided into the limiting partition plate 51, the plurality of connecting parts 52 and the plurality of limiting protrusions 53, the connecting parts 52 are arranged to enable the end part of the shell 1 of one battery cell array to be communicated with the end part of the shell 1 of the other battery cell array through the connecting parts 52, and accordingly the tightness of communication between the cooling liquid cavities 3 of the battery cell shells is improved. And meanwhile, the limiting protrusions 53 can further limit and fix the battery cell shell. Thus, the pack case 10 of the battery module has the advantage of further improving the connection stability of the pack case.
Optionally, the limiting separator 51 is provided with a plurality of bolt holes 511, and the studs pass through the limiting separator 51 and the bottom wall of the battery box 200 through the bolt holes 511.
Alternatively, the limiting spacer 51 may be fixed to the battery case 200 by bolts.
As shown in fig. 6 and 7, the corner of the casing 1 is provided with an avoiding portion 11, the avoiding portions 11 of the casings 1 of two adjacent battery cell rows form a limiting groove, and at least a part of the limiting protrusion 53 is arranged in the limiting groove to form a mortise and tenon structure.
According to the combined shell 10 of the battery module, the avoidance parts 11 are arranged at the edges and corners of the shell 1, the avoidance parts 11 of the shell 1 of two adjacent battery cell rows form the limit groove, and at least one part of the limit protrusion 5353 is arranged in the limit groove, so that the two adjacent battery cell rows can be connected simultaneously through the limit protrusion 53. Therefore, the combined shell 10 of the battery module further improves the connection stability of the adjacent battery cell shells.
As shown in fig. 6 and 7, the limiting protrusion 53 includes a guiding portion 531 which is provided at one end of the limiting protrusion 53 in the thickness direction of the limiting partition plate 51 and is wedge-shaped, and the guiding portion 531 is provided in the limiting groove to form a mortise and tenon structure.
According to the combined shell 10 of the battery module, the guide part 531 which is arranged at one end of the limiting protrusion 53 and is wedge-shaped can absorb the direct installation error of the battery cell shell and the battery cell shell, and the convenience of inserting the limiting protrusion 53 into the limiting groove through the guide can be improved, so that the installation convenience of the limiting protrusion 53 is improved.
As shown in fig. 8 to 12, the limiting separator 51 is provided with a connecting hole, the connecting portion 52 is a through plug, the through plug is arranged on the connecting hole in a penetrating manner, and the through plug is connected between the cooling liquid cavities 3 of two adjacent cell shells.
According to the combined shell 10 of the battery module, the connecting part 52 is the through plug, and two ends of the through plug are communicated with the cooling liquid cavities 3 of the two battery cell shells, so that the problem of complex pipeline arrangement is avoided. While also reducing the internal space occupied by the battery box 200 to some extent.
Specifically, both ends of the through plug are penetrated on the outer shell 1 of the battery cell shell so as to be communicated with the corresponding cooling liquid cavity 3. The through plug can limit the cell shells in the cell rows to a certain extent. Thus, the pack case 10 of the battery module further improves structural stability.
The battery module 100 according to the embodiment of the present invention includes a battery cell and the battery module pack 10 according to any one of the above-described battery modules, the battery cell being disposed in the battery module pack 10.
Therefore, the battery module 100 of the embodiment of the invention has the advantage of improving the heat dissipation efficiency and the safety of the battery module 100.
The battery pack 1000 according to an embodiment of the present invention may include a battery case 200 and the battery module 100 according to the claims, the battery module 100 being disposed in the battery case 200.
Therefore, the battery pack 1000 of the embodiment of the invention has the advantage of improving the heat dissipation efficiency and the safety of the battery module 100.
As shown in fig. 3 and 4, the side wall of the battery box 200 has a first liquid cooling chamber and a second liquid cooling chamber disposed opposite to each other in the first direction, and the first liquid cooling chamber, the first collecting channel 31, the liquid cooling main channel 33, the second collecting channel 32, and the second liquid cooling chamber are sequentially communicated to form a cooling liquid passage.
Thus, the battery pack 1000 according to the embodiment of the present invention can further cool the wall surface of the cell module by providing the first liquid cooling chamber and the second liquid cooling chamber, which are disposed opposite to each other in the first direction, on the side wall of the battery case 200. Thus, the battery module 100 further improves the cooling effect of the battery cell module.
Further, the first liquid cooling cavity and the second liquid cooling cavity can connect the cooling liquid cavities 3 of the plurality of cell rows and collect cooling liquid therein. Therefore, the cooling effect of the battery cell module is further improved, and the arrangement of a pipeline in the battery box 200 is avoided.
As shown in fig. 6 and 13 to 15, the battery case 200 includes an outer case 6, a liquid inlet assembly 71 and a liquid return assembly 72, the liquid inlet assembly 71 and the liquid return assembly 72 are disposed between the outer case 6 and the battery module 100 in opposition in a first direction, the liquid inlet assembly 71 has a first liquid cooling chamber, and the liquid return assembly 72 has a second liquid cooling chamber. Thus, the battery pack 1000 of the embodiment of the present invention has the advantage of simple structure.
As shown in fig. 6, the battery module 100 has a plurality of cell columns, the liquid inlet assembly 71 includes a main liquid inlet pipe 711 and a plurality of auxiliary liquid inlet pipes 712 connected, the auxiliary liquid inlet pipes 712 are arranged at intervals along the third direction, and the auxiliary liquid inlet pipes 712 are communicated with the cooling liquid pipes of the cell shells in the cell columns; the return assembly 72 includes a primary return tube and a plurality of secondary return tubes disposed in spaced apart relation along the third direction, and each in communication with the coolant tubes of the cell housings in the cell array. Thereby, complicated arrangement of connecting lines can be avoided. While occupying the internal space of the battery box 200 to some extent.
Specifically, the first liquid cooling cavity of the liquid inlet assembly 71 includes a main liquid inlet cavity and a plurality of auxiliary liquid inlet cavities, which are communicated, the auxiliary liquid inlet cavities are arranged at intervals along the third direction, and the auxiliary liquid inlet cavities are communicated with the cooling liquid cavities 3 of the cell shells in the cell array; the second liquid cooling chamber of the reflow assembly 72 includes a main reflow chamber and a plurality of auxiliary reflow chambers, the auxiliary reflow chambers are disposed at intervals along the third direction, and the auxiliary reflow chambers are all communicated with the cooling liquid chambers 3 of the cell housings in the cell array.
Optionally, the plurality of secondary liquid inlet cavities are in one-to-one correspondence with the plurality of liquid cooling channels 331. And further, each liquid cooling sub-channel 331 can be ensured to be distributed with cooling liquid. Thus, the battery pack 1000 of the embodiment of the invention improves the uniformity of cooling the battery cells.
Further, the main liquid inlet pipe 711 and the auxiliary liquid inlet pipe 712 have flat tubular structures. Thereby reducing the space occupied in the thickness direction of the battery case 200. Therefore, the energy density of the battery module is improved.
Each of the intake and return assemblies 71, 72 is integrally formed or welded with the outer case 6. Thus, the battery pack 1000 of the embodiment of the present invention has an advantage of easy processing.
As shown in fig. 3 and 4, each of the liquid intake assembly 71 and the liquid return assembly 72 is spaced apart from the outer case 6 in the inner-outer direction so as to form the heat insulating chamber 8. Therefore, the battery pack 1000 of the embodiment of the invention reduces heat exchange between the cooling liquid and the outside and improves heat exchange efficiency with the battery cell.
Optionally, an insulating protective layer is adhered to the bottom of the outer case 6.
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 embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (14)

1. A combination case of a battery module, comprising:
the battery cell comprises a plurality of battery cell shells, each battery cell shell comprises an outer shell and an inner shell arranged in the outer shell, the inner shell is provided with a containing cavity capable of containing a battery cell, a cooling liquid cavity is formed in a space between the outer shell and the inner shell, the cooling liquid cavity comprises a first current collecting channel, a second current collecting channel and a liquid cooling main channel, the liquid cooling main channel extends along a first direction, the first current collecting channel and the second current collecting channel are relatively communicated with two ends of the extending direction of the liquid cooling main channel in the first direction, and the first current collecting channel of one battery cell shell is communicated with the second current collecting channel of the adjacent battery cell shell.
2. The combination case of a battery module according to claim 1, wherein the cell case has adjacent first and second sides, the first side having an area larger than an area of the second side, the liquid-cooled main duct being disposed on the first side.
3. The combination case of a battery module according to claim 2, further comprising a liquid-blocking plate disposed in the liquid-cooling main duct so as to divide the liquid-cooling main duct into a plurality of liquid-cooling branches extending in the first direction, the plurality of liquid-cooling branches being disposed at intervals in a second direction, the second direction being disposed perpendicular to the first direction.
4. The battery module combination case according to claim 1, wherein a plurality of the cell cases are arranged in a row in order along the first direction to form cell rows, the plurality of the cell cases of each cell row are arranged end to end in the first direction, and the first current collecting channels of two adjacent cell cases are communicated with the second current collecting channels of the adjacent cell cases.
5. The battery module combination case of claim 4, further comprising a plurality of the cell cases arranged in a column to form a cell column having a plurality of columns, a portion of the limiting member being spaced between two adjacent cell columns.
6. The battery module combination case according to claim 5, wherein the limiting member comprises a limiting spacer, a plurality of connecting portions and a plurality of limiting protrusions, the plurality of connecting portions and the plurality of limiting protrusions are alternately arranged on the limiting spacer at intervals along a third direction, the limiting protrusions extend along a second direction, the end portion of the outer case of one of the battery cell rows is communicated with the end portion of the outer case of the other battery cell row through the connecting portions, the adjacent battery cell rows are limited by the limiting protrusions, and the third direction is perpendicular to both the first direction and the second direction.
7. The battery module combination shell according to claim 5, wherein the corners of the shell are provided with avoidance portions, the avoidance portions of the shells of two adjacent battery cell rows form the limit groove, and at least a part of the limit protrusions penetrate through the limit groove to form a mortise and tenon structure;
and/or the limiting protrusion comprises a wedge-shaped guide part arranged at one end of the limiting protrusion;
and/or the limiting partition plate is provided with a connecting hole, the connecting part is a through plug, the through plug is arranged on the connecting hole in a penetrating way, and the through plug is connected between the cooling liquid cavities of the two adjacent battery cell shells.
8. A battery module characterized by comprising an electric core and a combination case of the battery module according to any one of claims 1 to 7, the electric core being disposed in the combination case of the battery module.
9. The battery module of claim 8, wherein the plurality of cells are arranged in series, and the plurality of cells are arranged in sequence along the first direction.
10. A battery pack comprising a battery case and the battery module according to claim 8 or 9, the battery module being disposed in the battery case.
11. The battery pack according to claim 10, wherein the battery case has a first liquid cooling chamber and a second liquid cooling chamber disposed opposite to each other in the first direction on a side wall thereof, and the first liquid cooling chamber, the first collecting channel, the liquid cooling main channel, the second collecting channel, and the second liquid cooling chamber are sequentially communicated to form a cooling liquid passage.
12. The battery pack of claim 11, wherein the battery compartment comprises an outer compartment, a liquid inlet assembly and a liquid return assembly, the liquid inlet assembly and the liquid return assembly being disposed opposite one another in the first direction between the outer compartment and the battery module, the liquid inlet assembly having a first liquid cooling chamber and the liquid return assembly having a second liquid cooling chamber.
13. The battery pack of claim 12, wherein the battery module has a plurality of cell rows, the fluid intake assembly includes a primary fluid intake tube and a plurality of secondary fluid intake tubes connected, the secondary fluid intake tubes being disposed in spaced apart relation along a third direction, and the secondary fluid intake tubes being in communication with the coolant tubes of the cell housings in the cell rows; the liquid return assembly comprises a main return pipe and a plurality of auxiliary return pipes, wherein the auxiliary return pipes are arranged at intervals along a third direction, and the auxiliary return pipes are communicated with the cooling liquid pipes of the cell shells in the cell array.
14. The battery pack of claim 13, wherein each of the liquid inlet assembly and liquid return assembly is integrally formed or welded with the outer case;
and/or the main liquid inlet pipe and the plurality of auxiliary liquid inlet pipes are arranged in a flat tubular shape, and the main return pipe and the plurality of auxiliary return pipes are arranged in a flat tubular shape;
and/or each of the liquid inlet component and the liquid return component is spaced from the outer box body in the inner-outer direction so as to form an insulating cavity.
CN202310927125.8A 2023-07-25 2023-07-25 Combined shell of battery module, battery module and battery pack Pending CN116722291A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310927125.8A CN116722291A (en) 2023-07-25 2023-07-25 Combined shell of battery module, battery module and battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310927125.8A CN116722291A (en) 2023-07-25 2023-07-25 Combined shell of battery module, battery module and battery pack

Publications (1)

Publication Number Publication Date
CN116722291A true CN116722291A (en) 2023-09-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310927125.8A Pending CN116722291A (en) 2023-07-25 2023-07-25 Combined shell of battery module, battery module and battery pack

Country Status (1)

Country Link
CN (1) CN116722291A (en)

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