CN112072025A - Integrated lower bottom plate of anti-extrusion battery lower box body and preparation method thereof - Google Patents
Integrated lower bottom plate of anti-extrusion battery lower box body and preparation method thereof Download PDFInfo
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- CN112072025A CN112072025A CN202010919186.6A CN202010919186A CN112072025A CN 112072025 A CN112072025 A CN 112072025A CN 202010919186 A CN202010919186 A CN 202010919186A CN 112072025 A CN112072025 A CN 112072025A
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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
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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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
- H01M10/65—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
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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
- H01M10/65—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
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- 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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- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses an integrated lower bottom plate of an anti-extrusion battery lower box body and a preparation method thereof, wherein the lower bottom plate comprises a bottom plate cross beam, a water cooling plate and a water cooling sealing plate; the water cooling plate comprises an upper cover plate with a pipe orifice and a lower cover plate which is punched into a parallel runner; the left end and the right end of the X direction of the water cooling plate are provided with reserved parts which are nested with the bottom plate cross beam, the reserved parts are not filled with water cooling channels, and the left end and the right end of the X direction of the bottom plate cross beam are provided with convex parts which are nested with the bottom plate and the water cooling sealing plate; the bottom plate cross beam is connected with the water cooling plate and the water cooling sealing plate in a nested manner in the XY plane, a reserved part of the water cooling plate and the upper cover plate form a square groove which is in lap joint with a convex part of the bottom plate cross beam, and the water cooling sealing plate and the reserved part of the water cooling plate form a step which is embedded into the groove below the convex part of the cross beam. The invention provides thermal management for the power battery system, has excellent structural strength and rigidity, reduces the requirement of the battery box body on the height in the Z direction, and reduces the production cost.
Description
Technical Field
The invention belongs to the field of power batteries, and particularly relates to an integrated lower bottom plate of an anti-extrusion battery lower box body and a preparation method thereof.
Background
The lithium ion battery has the advantages of high specific capacity, good reversibility, long cycle life and the like, and is an ideal energy storage device for the electric passenger vehicle. The electric vehicle based on traditional fuel vehicle transformation mostly adopts a battery system with the maximized number of battery modules arranged in a limited chassis space in order to improve the endurance mileage of the whole vehicle, so that the requirement on the structural strength of a power battery system is high, and the traditional scheme mostly adopts a casting/metal plate mechanical integrated structure, so that the battery system is heavy in weight, high in cost, complex in assembly process and low in space utilization rate. Meanwhile, the water cooling plate of the existing power battery system integration scheme is formed by connecting a plurality of sub-plates and is divided into two structural components with a battery box body, so that the Z-direction height of the battery system is large, and the space layout of the whole vehicle is not facilitated. Therefore, weight reduction, modularization, and flattening have become trends in the development of power battery systems.
Chinese patent CN110380153A discloses a liquid cooling system for a power battery pack, which comprises a liquid cooling plate arranged between a battery box bottom plate and a battery module and liquid cooling pipes positioned at two sides of the liquid cooling plate, wherein the top end surface of the liquid cooling plate is flatly paved with heat conducting fins, and the bottom of the liquid cooling plate is provided with a heat preservation support member; the heat preservation support piece comprises a support piece used for supporting the liquid cooling plate and a heat preservation layer used for filling the space between the liquid cooling plate and the battery box body bottom plate. The liquid cooling system assembly in the scheme is complex, and the box body is reserved with arrangement space in the Z direction, so that the space utilization rate of the whole power battery system is reduced.
Chinese patent CN209912931U discloses a novel battery pack lower case, which comprises: the inner frame beam assembly is formed by welding and splicing a plurality of inner cross beams and inner longitudinal beams and is used for installing and fixing the battery pack; the skin is wrapped and arranged outside the inner frame beam assembly and used for sealing and protecting the battery pack; and the outer frame beam assembly is welded, spliced and arranged by a plurality of outer transverse supports and outer longitudinal supports and is used for supporting and protecting the lower box body of the battery. Not all subassemblies all adopt the aluminium alloy in above-mentioned scheme, therefore lead to battery system's weight big, and battery box and water-cooling structure do not integrate moreover, and space utilization is not high.
Disclosure of Invention
The invention aims to provide an integrated lower bottom plate of an anti-extrusion battery lower box body and a preparation method thereof, provides thermal management for a power battery system, has excellent structural strength and rigidity, reduces the requirement of the battery box body on the height in the Z direction, and reduces the production cost.
The technical scheme adopted by the invention is as follows:
an integrated lower bottom plate of an anti-extrusion battery lower box body comprises a bottom plate cross beam, a water-cooling plate and a water-cooling sealing plate; the water cooling plate comprises an upper cover plate with a pipe orifice and a lower cover plate which is punched into a parallel runner; the left end and the right end of the X direction of the water cooling plate are provided with reserved parts which are nested with the bottom plate cross beam, the reserved parts are not filled with water cooling channels, and the left end and the right end of the X direction of the bottom plate cross beam are provided with convex parts which are nested with the bottom plate and the water cooling sealing plate; the bottom plate cross beam is connected with the water cooling plate and the water cooling sealing plate in a nested manner in the XY plane, a reserved part of the water cooling plate and the upper cover plate form a square groove which is in lap joint with a convex part of the bottom plate cross beam, and the water cooling sealing plate and the reserved part of the water cooling plate form a step which is embedded into the groove below the convex part of the cross beam.
Further, the bottom plate crossbeam is 1mm higher than the upper cover plate.
Furthermore, when the battery module is installed, the heat conducting pad is filled between the water cooling plate and the battery module.
Further, the battery module further comprises a first sub-base plate for separating two adjacent battery modules.
Furthermore, the Z-direction heights of the left and right areas of the first sub-bottom plate are consistent, and the middle area is 1mm higher than the left and right areas.
Furthermore, the first sub-base plate is arranged between the two water-cooling plates, the left end and the right end of the X direction of the first sub-base plate are respectively provided with a convex part, the reserved part of the water-cooling plate and the square groove formed by the upper cover plate are lapped on the convex parts, and the water-cooling sealing plate and the reserved part of the water-cooling plate form a step and are embedded into the groove below the convex parts.
The high-voltage distribution box further comprises a second sub-bottom plate, wherein the second sub-bottom plate is of a flat plate structure with consistent Z-direction height and is used for carrying circuit elements including the high-voltage distribution box.
Furthermore, the second sub-bottom plate is arranged on one side of the bottom plate cross beam and connected with the bottom plate cross beam, and the second sub-bottom plate of the corresponding connecting part is provided with a U-shaped groove which is connected with the convex part of the bottom plate cross beam in a nesting mode.
According to the preparation method of the integrated lower bottom plate of the anti-extrusion battery lower box body, the left end and the right end of the bottom plate cross beam in the X direction are provided with the convex parts; forming a water cooling plate by an upper cover plate with a pipe orifice and a lower cover plate which is punched into a parallel runner, wherein reserved parts which are nested with a bottom plate cross beam are arranged at the left end and the right end of the water cooling plate in the X direction, and the reserved parts are not filled with a water cooling runner; overlapping the reserved part of the water cooling plate and a square groove formed by the upper cover plate on the convex part of the bottom plate beam; welding a water-cooling sealing plate below the water-cooling plate and the reserved part, wherein the water-cooling sealing plate and the reserved part of the water-cooling plate form a step and are embedded into the groove below the convex part of the cross beam;
the utility model provides a box under anti extrusion battery, includes frame roof beam subassembly and above-mentioned lower plate, and frame roof beam subassembly all is equipped with nearly square groove including controlling bearing boundary beam, front and back boundary beam and turning boundary beam, bearing center sill about, bearing boundary beam, front and back boundary beam and turning boundary beam bottom about, bottom plate crossbeam Y to both ends be equipped with nearly square groove lapped boss, be equipped with in the middle of the bottom plate crossbeam with the bearing in the lapped U-shaped opening of roof beam.
The invention has the beneficial effects that:
the lower bottom plate of the integrated water cooling plate effectively provides thermal management for the power battery system; the battery pack lower box body has excellent structural strength and rigidity, and the mechanical properties of mechanical impact resistance, vibration resistance and the like of the battery pack lower box body are improved; the requirement of the battery box body on the height in the Z direction is reduced; the design requirements of light weight and flattening of the electric automobile are met, and the production cost of an enterprise can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a lower box in the embodiment of the present invention.
Fig. 2 is a schematic structural view of a frame beam assembly in an embodiment of the present invention.
Fig. 3 is an exploded view of the lower plate in an embodiment of the present invention.
FIG. 4 is a schematic diagram of a water-cooling plate structure according to an embodiment of the present invention.
FIG. 5 is a schematic cross-sectional view of a lower base plate in an embodiment of the present invention.
Fig. 6 is an enlarged view at a in fig. 5.
Fig. 7 is an enlarged view at D in fig. 6.
Fig. 8 is an enlarged view at B in fig. 5.
Fig. 9 is an enlarged view at E in fig. 8.
Fig. 10 is an enlarged view at C in fig. 5.
Fig. 11 is an enlarged view at F in fig. 10.
FIG. 12 is a schematic view of an assembly structure of the lower case in the embodiment of the present invention.
Detailed Description
The invention is further illustrated below with reference to solids and examples.
As shown in fig. 1, the anti-extrusion battery lower box comprises a frame beam assembly 1, a lower bottom plate 2, a 590 large module with a lug end plate, a pipeline 4 consisting of a tee joint/hose/pipe joint and a riveting standard part 5.
As shown in fig. 1 and 2, the frame beam assembly 1 includes left and right load-bearing side beams 1.1, front and rear side beams and corner side beams 1.3, and a load-bearing center beam 1.2. The bottoms of the left and right bearing side beams 1.1, the front and rear side beams and the corner side beam 1.3 are provided with approximately square grooves, and two ends of the bottom plate cross beam 2.3 are provided with bosses 2.3.1 which are lapped with the approximately square grooves; the middle of the bottom plate crossbeam 2.3 is provided with a U-shaped opening 2.3.2 lapped with the bearing middle beam 1.2.
As shown in fig. 3, the lower plate 2 includes aluminum profile sub-plates (including first sub-plates 2.1.2, 2.1.3 and 2.1.4, and second sub-plates 2.1.1), water-cooling plates 2.2, base plate beams 2.3 and water-cooling plate sealing plates 2.4. As shown in fig. 4, the water-cooled plate 2.2 comprises an upper cover plate 2.2.1 with nozzles and a lower cover plate 2.2.2 stamped into parallel flow channels.
As shown in fig. 5 to 11, fig. 5 is a schematic cross-sectional view of the lower plate 2, and fig. 6 to 11 are enlarged views of the nesting connection portion in the lower plate 2. The numbering mode of the water cooling plate 2.2 is the same as that of the bottom plate, and the water cooling plate is 2.2.1, 2.2.2, 2.2.3, 2.2.4 and 2.2.5 from left to right respectively; the numbering mode of the bottom plate cross beam 2.3 is the same as that of the sub-bottom plates, and the numbering modes are respectively 2.3.1, 2.3.2 and 2.3.3 from left to right; the water-cooled sealing plate 2.4 is numbered in the same way as the sub-base plate, from left to right, 2.4.1, 2.4.2, 2.4.3, 2.4.4 and 2.4.5, respectively.
The left end and the right end of the water-cooling plate 2.2.1 in the X direction are provided with reserved parts 2.2.1.1 which are nested with the bottom plate cross beam 2.3, the reserved parts are not filled with water-cooling channels, and the left end and the right end of the bottom plate cross beam 2.3.2 in the X direction are provided with convex parts 2.3.2.1 which are nested and connected with the bottom plate and the water-cooling sealing plate 2.4; the bottom plate cross beam 2.3.2 is connected with the water cooling plate 2.2.1 and the water cooling sealing plate 2.4.1 in a nested way in the XY plane: the reserved part 2.2.1.1 of the water cooling plate 2.2.1 and the upper cover plate 2.2.1 form a square groove which is overlapped on the convex part 2.3.2.1 of the bottom plate beam 2.3.2; the water-cooled sealing plate 2.4.1 and the reserved part 2.2.1.1 of the water-cooled plate 2.2.1 form a step and are embedded into the groove below the convex part 2.3.2.1 of the cross beam 2.3.2.
The upper surface of the floor beam 2.3 is provided with an area 2.3.2.2, preferably 1mm thick, above the surface of the upper cover plate 2.2.1, so that the upper surface of the water cooling plate 2.2 can be arranged with a thermal pad filling the height difference between the water cooling plate 2.2 and the upper surface of the floor beam 2.3.
The second sub-bottom plate 2.1.1 is a flat plate structure with consistent Z-direction height and is used for bearing circuit elements such as a high-voltage distribution box and the like. The right-hand connecting part of the second subfloor 2.1.1 is provided with a U-shaped recess which is in a nested connection with the protrusion 2.3.1.1 of the right floor crossbeam 2.3.1.
The first subfloor 2.1.3 serves to separate two adjacent massive modules 3, as shown in fig. 1.
The first subfloor 2.1.3 has the same height in the Z direction in the left and right regions, and the middle region is higher than the left and right regions, as shown in fig. 7, and the middle region 2.1.3.3 is higher than the left and right regions 2.1.3.2, and preferably the middle region is 1mm higher than the left and right regions.
The first sub-base plate 2.1.3 is arranged between the two water-cooling plates, the left end and the right end of the first sub-base plate 2.1.3 in the X direction are respectively provided with a convex part 2.1.3.1, a reserved part 2.2.5.1 of the water-cooling plate 2.2.5 and a square groove formed by the upper cover plate 2.2.1 are overlapped with the convex part 2.1.3.1 of the sub-base plate 2.1.3; the water-cooled sealing plate 2.4.5 and the reserved part 2.2.5.1 of the water-cooled plate 2.2.5 form a step and are embedded into the groove below the convex part 2.1.3.1 of the first subfloor partition 2.1.3.
The connection mode of the water cooling plate 2.2 and the sub-bottom plate 2.1 or the bottom plate cross beam 2.3 in other areas of the whole bottom plate is consistent with the structure.
The aforesaid divides bottom plate 2.1, water-cooling board 2.2, bottom plate crossbeam 2.3 and water-cooling closing plate 2.4 pass through the overlap joint of kneck U type recess and convex part, then carries out friction stir welding and forms box lower plate 2, when reducing box weight, is integrated with water-cooling board 2.2 and box, has improved battery box's space utilization. The water cooling plate sealing plate 2.4 is in lap joint and tailor welding below the water cooling plate 2.2, and protects the water cooling plate 2.2 from external force impact while sealing the lower box body.
As shown in fig. 12, the lower base plate 2 and the frame beam assembly 1 are welded into an integrated power battery lower box body. The module 3 is connected with the box body through the riveting sleeve 5 through bolts, so that the assembly is attractive, and the reliability is high. The pipeline formed by connecting the hose with the two/three-way connector 4.1-4.2/pipe joint 4.3 in series can be quickly connected with the water cooling plate 2.2, and the assembly process is simple. The cavity of the outer edge beam (1.1, 1.3) can be riveted with a waterproof sleeve by opening holes, and the waterproof sleeve can be reliably connected with the upper box body of the battery while utilizing the space of the cavity. After the whole battery system is grouped, the Z-direction height can be controlled within 132mm, and the energy density can break through 180 Wh/kg.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides an anti extrusion battery box down integrates lower plate which characterized in that: comprises a bottom plate beam, a water-cooling plate and a water-cooling sealing plate; the water cooling plate comprises an upper cover plate with a pipe orifice and a lower cover plate which is punched into a parallel runner; the left end and the right end of the X direction of the water cooling plate are provided with reserved parts which are nested with the bottom plate cross beam, the reserved parts are not filled with water cooling channels, and the left end and the right end of the X direction of the bottom plate cross beam are provided with convex parts which are nested with the bottom plate and the water cooling sealing plate; the bottom plate cross beam is connected with the water cooling plate and the water cooling sealing plate in a nested manner in the XY plane, a reserved part of the water cooling plate and the upper cover plate form a square groove which is in lap joint with a convex part of the bottom plate cross beam, and the water cooling sealing plate and the reserved part of the water cooling plate form a step which is embedded into the groove below the convex part of the cross beam.
2. The integrated lower plate of the lower box body of the anti-extrusion battery of claim 1, wherein: the bottom plate crossbeam is 1mm higher than the upper cover plate.
3. The integrated lower plate of the lower box body of the anti-extrusion battery of claim 1, wherein: when the battery module is installed, the heat conducting pad is filled between the water cooling plate and the battery module.
4. The integrated lower plate of the lower box body of the anti-extrusion battery of claim 1, wherein: the battery module structure further comprises a first sub-base plate used for separating two adjacent battery modules.
5. The integrated lower plate of the lower box body of the anti-extrusion battery as recited in claim 4, wherein: the Z-direction heights of the left and right areas of the first sub-bottom plate are consistent, and the middle area is 1mm higher than the left and right areas.
6. The integrated lower plate of the lower box body of the anti-extrusion battery as recited in claim 4, wherein: the first branch bottom plate is arranged between the two water cooling plates, the left end and the right end of the X direction of the first branch bottom plate are respectively provided with a convex part, the reserved part of the water cooling plate is lapped on the convex part with a square groove formed by the upper cover plate, and the reserved part of the water cooling sealing plate and the water cooling plate form a step which is embedded into the groove below the convex part.
7. The integrated lower plate of the lower box body of the anti-extrusion battery of claim 1, wherein: the high-voltage distribution box further comprises a second sub-bottom plate which is of a flat plate structure with consistent Z-direction height and is used for bearing circuit elements including the high-voltage distribution box.
8. The integrated lower plate of the lower box body of the anti-extrusion battery of claim 7, wherein: the second sub-bottom plate is arranged on one side of the bottom plate cross beam and connected with the bottom plate cross beam, and the second sub-bottom plate of the corresponding connecting part is provided with a U-shaped groove which is connected with the convex part of the bottom plate cross beam in an embedded mode.
9. A method for preparing an integrated bottom plate of an anti-extrusion battery bottom case according to any one of claims 1 to 8, wherein the method comprises the following steps: convex parts are arranged at the left end and the right end of the X direction of the bottom plate beam; forming a water cooling plate by an upper cover plate with a pipe orifice and a lower cover plate which is punched into a parallel runner, wherein reserved parts which are nested with a bottom plate cross beam are arranged at the left end and the right end of the water cooling plate in the X direction, and the reserved parts are not filled with a water cooling runner; overlapping the reserved part of the water cooling plate and a square groove formed by the upper cover plate on the convex part of the bottom plate beam; and the water-cooling sealing plate is welded to the lower parts of the water-cooling plate and the reserved part, and the water-cooling sealing plate and the reserved part of the water-cooling plate form a step which is embedded into the groove below the convex part of the bottom plate cross beam.
10. The utility model provides a box under anti extrusion battery which characterized in that: an integrated lower plate comprising a frame beam assembly and the anti-extrusion battery lower box body as claimed in any one of claims 1 to 8, wherein the frame beam assembly comprises left and right bearing side beams, front and rear side beams, corner side beams and a bearing middle beam, the bottoms of the left and right bearing side beams, the front and rear side beams and the corner side beams are respectively provided with a nearly square groove, both ends of the Y-direction of the bottom plate cross beam are provided with bosses lapped with the nearly square grooves, and the middle of the bottom plate cross beam is provided with a U-shaped opening lapped with the bearing middle beam.
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| CN202010919186.6A CN112072025A (en) | 2020-09-04 | 2020-09-04 | Integrated lower bottom plate of anti-extrusion battery lower box body and preparation method thereof |
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| CN202010919186.6A CN112072025A (en) | 2020-09-04 | 2020-09-04 | Integrated lower bottom plate of anti-extrusion battery lower box body and preparation method thereof |
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Cited By (2)
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| CN113422139A (en) * | 2021-06-18 | 2021-09-21 | 中国第一汽车股份有限公司 | Battery assembly, electric vehicle and design method |
| EP4187702A4 (en) * | 2021-01-11 | 2024-03-13 | LG Energy Solution, Ltd. | Battery pack and vehicle comprising same |
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| CN109742281A (en) * | 2018-12-27 | 2019-05-10 | 宁德时代新能源科技股份有限公司 | Battery box |
| CN109671890A (en) * | 2019-01-11 | 2019-04-23 | 广州纵通汽车设计有限公司 | Battery box body and battery case |
| CN109817861A (en) * | 2019-03-15 | 2019-05-28 | 北京新能源汽车股份有限公司蓝谷动力系统分公司 | battery box |
| CN209544448U (en) * | 2019-03-15 | 2019-10-25 | 北京新能源汽车股份有限公司蓝谷动力系统分公司 | Bottom plate and battery package of battery box |
| CN110571378A (en) * | 2019-08-29 | 2019-12-13 | 广汽新能源汽车有限公司 | Battery case and battery system |
| CN110611064A (en) * | 2019-09-29 | 2019-12-24 | 江苏大学 | Aluminum alloy battery pack lower shell |
| CN111403651A (en) * | 2020-03-31 | 2020-07-10 | 杭州捷能科技有限公司 | Battery pack box and battery pack with same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4187702A4 (en) * | 2021-01-11 | 2024-03-13 | LG Energy Solution, Ltd. | Battery pack and vehicle comprising same |
| CN113422139A (en) * | 2021-06-18 | 2021-09-21 | 中国第一汽车股份有限公司 | Battery assembly, electric vehicle and design method |
| CN113422139B (en) * | 2021-06-18 | 2022-05-31 | 中国第一汽车股份有限公司 | Battery assembly, electric vehicle and design method |
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Application publication date: 20201211 |