CN214411328U - Square aluminum shell integrated with top cover and power battery thereof - Google Patents
Square aluminum shell integrated with top cover and power battery thereof Download PDFInfo
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- CN214411328U CN214411328U CN202120905780.XU CN202120905780U CN214411328U CN 214411328 U CN214411328 U CN 214411328U CN 202120905780 U CN202120905780 U CN 202120905780U CN 214411328 U CN214411328 U CN 214411328U
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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
Abstract
The utility model discloses a square aluminum hull of integrated top cap and power battery thereof. The power battery comprises an aluminum shell, a negative electrode top cover, a positive electrode switching piece, a negative electrode switching piece, a naked electric core, a top cover insulating film, a naked electric core insulating film, electrolyte and a liquid injection hole sealing nail. After the conventional aluminum shell is subjected to punch forming, a positive pole boss, a liquid injection hole and an explosion-proof valve mounting hole are formed in a shell cover area of the aluminum shell through punching, and an explosion-proof valve is mounted in the explosion-proof valve mounting hole to form the aluminum shell of the integrated top cover structure. The negative pole top cap includes apron, negative pole post subassembly, and the latter includes negative pole post, negative pole post injection molding, negative pole post seal insulation, and negative pole post subassembly is installed on the apron to it is insulating with the apron. The positive pole switching piece switches on the positive pole lug and the positive pole boss of the bare cell, and the negative pole switching piece switches on the negative pole lug and the negative pole post of the bare cell. The beneficial effects are that: the positive pole, the positive pole injection molding part and the positive pole sealing insulating part can be saved, and the manufacturing cost of the square aluminum shell power battery is reduced.
Description
Technical Field
The application relates to the field of electrochemical energy storage devices, in particular to a square aluminum shell integrated with a top cover and a power battery thereof.
Background
The cost of the lithium battery system is high due to raw materials and manufacturing process, and accounts for more than 30% of the cost of the pure electric new energy automobile.
In order to reduce the cost of the lithium battery system, structural schemes such as CTP, blade batteries and the like are disclosed in the industry, and the structure of the lithium battery system is integrated and simplified.
The square aluminum shell power battery is widely applied due to high system grouping efficiency and long service life of a battery system.
The square aluminum shell power battery generally comprises a top cover, a switching piece, a naked electric core insulating film, electrolyte, a liquid injection hole sealing nail and an aluminum shell. One end of the switching piece is connected with the pole on the top cover, and the other end of the switching piece is connected with the pole lug on the naked electric core. Naked electric core insulating film cladding naked electric core forms insulating protection with the casing. The top cover is connected with the aluminum shell. And after adding electrolyte into the semi-finished square aluminum shell power battery, infiltrating and forming, welding and sealing the liquid injection hole on the top cover by using the liquid injection hole sealing nail to form the square aluminum shell power battery.
The top cap generally includes a cover plate, a positive pole post assembly, a negative pole post assembly, an explosion-proof valve, a liquid injection hole, and a top bracket cover plate. The liquid injection hole is formed on the cover plate in a processing mode. The positive pole post assembly, the negative pole post assembly, the explosion-proof valve and the top bracket cover plate are arranged on the cover plate. The post assembly generally comprises a post, a post injection molding part and a post sealing insulating part. The post and the post sealing insulating part are installed on the cover plate through the post injection molding part.
The top cover has a plurality of precise parts and higher cost.
Therefore, it is necessary to develop a square aluminum-shell power battery structure to reduce the cost of the top cover and the power battery.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the square aluminum shell integrated with the top cover and the power battery thereof are provided, and the cost of the top cover and the cost of the power battery are reduced.
The technical scheme of the utility model as follows:
after the conventional aluminum shell is subjected to punch forming, a positive pole boss, a liquid injection hole and an explosion-proof valve mounting hole are formed in a shell cover area of the aluminum shell through punching, and an explosion-proof valve is mounted in the explosion-proof valve mounting hole to form the aluminum shell of the integrated top cover structure.
A square aluminum shell power battery integrated with a top cover comprises an aluminum shell, a negative top cover, a positive adapter plate, a negative adapter plate, a bare cell, a top cover insulating film, a bare cell insulating film, electrolyte and a liquid injection hole sealing nail. The structural features and relationships of the major components are as follows:
the aluminum hull does integrated top cap structure's aluminum hull.
The negative pole top cap includes apron, negative pole post subassembly, and the negative pole post subassembly includes negative pole post, negative pole post injection molding, negative pole post seal insulation, and the negative pole post unit mount is on the apron to it is insulating with the apron.
The both ends of naked electric core are derived respectively and are had naked electric core positive pole utmost point ear, naked electric core negative pole utmost point ear. Naked electric core insulating film cladding naked electric core main part face to it is fixed at naked electric core insulating film overlap joint district rubberizing tape.
The positive electrode adapter sheet is folded into a double-layer T shape by adopting an aluminum sheet, the opening part of the positive electrode adapter sheet is an ultrasonic connecting part of the positive electrode adapter sheet, and the plane part of the positive electrode adapter sheet is a laser connecting part of the positive electrode adapter sheet. The positive pole switching piece ultrasonic connecting part is welded with the positive pole lug of the naked electric core. The laser connecting part of the positive adapter plate is welded with the positive post boss of the aluminum shell.
The negative pole keysets adopts the copper sheet to fold into the right angle type, and the minor face is negative pole keysets supersound connecting portion, and the long limit is negative pole keysets laser connecting portion, forms negative pole keysets bending groove through mechanical extrusion mode in negative pole keysets laser connecting portion main part. The negative pole switching piece ultrasonic connecting portion is in the same place with naked electric core negative pole utmost point ear welding. The laser connecting part of the negative adapter plate is welded with the negative pole post of the negative top cover.
The top cover insulating film is arranged on the inner surface of the negative electrode top cover and is connected with the protruding end inside the negative electrode column assembly in a nested mode.
During the negative pole top cap embedding entered the aluminum hull, the casing terminal surface parallel and level of negative pole top cap surface and aluminum hull connected together through the laser welding mode.
Electrolyte is added through the liquid injection hole of the aluminum shell.
The liquid injection hole sealing nail is connected with the liquid injection hole of the aluminum shell in a nested manner and is connected together in a laser welding mode.
The utility model has the advantages that: the positive pole, the positive pole injection molding part and the positive pole sealing insulating part can be saved, and the manufacturing cost of the square aluminum shell power battery is reduced.
Drawings
FIG. 1: the square aluminum shell structure of the integrated top cover is a multi-view schematic diagram.
FIG. 2: A-A plane cross section of the square aluminum shell structure of the integrated top cover.
FIG. 3: and the structure of the negative electrode top cover is schematic.
FIG. 4: and C-C plane cross section of the negative electrode top cover.
FIG. 5: the structure schematic diagram of the positive electrode adapter plate.
FIG. 6: the structure schematic diagram of the negative pole adapter plate.
FIG. 7: naked electric core and switching piece welded structure sketch map.
FIG. 8: the structure of the square aluminum-shell power battery integrated with the top cover is schematic.
In the figure, the shell cover 11, the shell 12, positive post boss 13, annotate liquid hole 14, explosion-proof valve 15, aluminum hull 100, apron 21, negative pole post 1, negative pole post injection molding 2, negative pole post seal insulator 3, negative pole post subassembly 22, negative pole top cap 200, anodal switching piece supersound connecting portion 31, anodal switching piece laser connecting portion 32, corotation switching piece 300, negative pole switching piece supersound connecting portion 41, negative pole switching piece laser connecting portion 42, negative pole switching piece bending groove 43, negative conversion switching piece 400, naked electric core anodal utmost point ear 51, naked electric core negative pole utmost point ear 52, naked electric core 500, top cap insulating film 60, naked electric core insulating film 61.
Detailed Description
The present invention and the advantageous effects thereof will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to FIG. 1: the multi-view schematic diagram of the square aluminum shell structure of the integrated top cover and the attached figure 2 are as follows: the cross-sectional view of the a-a side of the square aluminum shell structure of the integrated top cap illustrates a specific embodiment of the square aluminum shell 100 of the integrated top cap of the present invention. Wherein the middle small drawing of fig. 1 is a front view of the aluminum shell 100, the left small drawing is a left view, the right small drawing is a right view, and the upper small drawing is a top view; fig. 2 is a sectional view taken along the plane a-a in the left side view of fig. 1.
After the conventional aluminum shell is subjected to punch forming by the conventional technology, the positive pole boss 13, the liquid injection hole 14 and the explosion-proof valve mounting hole are formed in the shell cover 11 area by punching, and burrs are removed, cleaned and dried by the conventional technology. The explosion-proof valve 15 is installed in the explosion-proof valve installation hole to form an aluminum shell 100 of an integrated top cover structure.
The positive post boss 13 is preferably square, and the fillet is preferably led to the corner and is handled, and the protruding height is according to 11 thickness of cap, the required operating space of power battery external connection, the inside anodal switching piece thickness integrated design of power battery, preferred 2~4 mm.
In order to prevent the electrolyte from contaminating the explosion-proof valve 15, the liquid injection hole 14 and the explosion-proof valve 15 are preferably provided on both sides of the positive post boss 13.
Referring to FIG. 3: negative pole top cap structure sketch map, attached 4: the negative cap is a cross-sectional view taken along plane C-C, wherein the left side of fig. 3 is a front view of the negative cap 200, the right side of fig. 3 is a cross-sectional view taken along plane B-B, and fig. 4 is a cross-sectional view taken along plane C-C of fig. 3.
The cathode post component 22 is composed of a cathode post 1, a cathode post injection molding component 2 and a cathode post sealing insulation component 3. The preferable raw material of the cathode pole 1 is a copper-aluminum composite plate, and the copper layer is positioned on the inner side of the power battery. The raw material of the cathode pole injection molding part 2 is preferably insulating plastic PPS. The raw material of the cathode terminal sealing insulator 3 is preferably fluororubber.
A negative electrode post mounting hole (not shown) is formed by punching the cover plate 21, the negative electrode post 1 and the negative electrode post sealing insulating member 3 are pre-mounted on the negative electrode post mounting hole, and the negative electrode post 1 and the negative electrode post sealing insulating member 3 are fixed on the cover plate 21 by the negative electrode post injection molding member 2 to form the negative electrode post assembly 22 and the negative electrode top cover 200. In order to reduce the cost, it is preferable that no parts such as an explosion-proof valve and a top holder cover plate are attached to the negative electrode top cover 200.
Referring to FIG. 5: the schematic structural diagram of the positive electrode interposer illustrates the structural features and implementation process of the positive electrode interposer 300. The positive electrode adaptor 300 is folded into a double-layer T shape by using an aluminum sheet, and the opening part is the positive electrode adaptor ultrasonic connecting part 31 and the plane part is the positive electrode adaptor laser connecting part 32. The cross section formed by the thickness and the width of the aluminum sheet needs to meet the requirement of the overcurrent capacity of the power battery. Preferably, the length and width of the laser connecting part 32 of the positive electrode adapter plate are respectively 1mm smaller than the corresponding length and width of the positive electrode column boss 13. The laser connecting part 32 of the positive pole adapter plate adopts a double-layer design, so that the problem of laser welding and overwelding with the positive pole boss 13 can be prevented. The positive pole switching piece 300 is folded into a double-layer T shape by adopting an aluminum sheet, and after the positive pole switching piece ultrasonic connecting part 31 is welded with a naked battery cell tab and the naked battery cell is inserted into the aluminum shell 100, the stress of the positive pole switching piece laser connecting part 32 and the inner surface of the positive pole boss 13 is kept uniform and good in contact, so that the laser welding effect is favorably improved.
Referring to FIG. 6: the structural schematic diagram of the negative adapter plate illustrates the structural features and the implementation process of the negative adapter plate 400. The negative adapter plate 400 is formed by folding a single-layer or multi-layer copper sheet into a right-angle shape, the short side is a negative adapter plate ultrasonic connecting part 41, the long side is a negative adapter plate laser connecting part 42, and a negative adapter plate bending groove 43 is formed in the negative adapter plate laser connecting part 42 main body in a mechanical extrusion mode. A single layer copper sheet is preferred. For example, the multilayer copper sheet is preferably ultrasonically welded and compounded together.
Referring to FIG. 7: the schematic diagram of the welding structure of the bare cell and the adapter plate illustrates the welding structure characteristics and implementation process of the bare cell 500, the positive adapter plate 300 and the negative adapter plate 400.
Naked electric core 500 adopts lamination or winding technology processing to form, and naked electric core 500 includes naked electric core main part (not mark in the picture), naked electric core positive pole utmost point ear 51, naked electric core negative pole utmost point ear 52. The bare cell positive electrode tab 51 and the bare cell negative electrode tab 52 are respectively located at two ends of the bare cell 500. The number of the bare cells 500 can be 1 or more, the scheme is preferably two, and when the number of the bare cells is more than or equal to 3, the bare cells can be compatible by adjusting the shapes of the adapter plates.
In order to improve the internal space utilization rate of the power battery and improve the ultrasonic welding effect with the adapter sheet, the lug of the bare battery core is preferably subjected to operations such as jig extrusion folding, ultrasonic pre-welding, top end face cutting shaping and dust collection according to the conventional technology.
The positive electrode adapter sheet ultrasonic connecting part 31 is arranged between the two bare cell positive electrode lugs 51 and connected together in an ultrasonic welding mode.
The negative electrode adapter sheet ultrasonic connecting portion 41 is arranged between the two bare cell negative electrode tabs 52 and connected together in an ultrasonic welding mode.
And performing conventional operations such as pressure shaping, dust removal and the like on the ultrasonic welding area.
Referring to FIG. 7: naked electric core and switching piece welded structure sketch map, fig. 8: the structural schematic diagram of the square aluminum-shell power battery integrated with the top cover illustrates the assembly implementation process of the aluminum shell 100, the negative top cover 200, the bare cell 500 (including the positive adapter 300 and the negative adapter 400) welded with the adapter, the top cover insulating film 60 and the bare cell insulating film 61.
PP is preferred to top cap insulating film 60, naked electric core insulating film 61 material, and 0.1~0.3mm is preferred to thickness, and overall dimension matches with negative pole top cap 200, naked electric core 500 respectively. The cap insulating film 60 has a through hole (not shown) in the middle that matches the negative post assembly 22.
The cap insulating film 60 is mounted on the inner surface of the negative electrode cap 200 and is in nested contact with the inner surface protruding end of the negative electrode pillar assembly 22.
Naked electric core 500 a week of cladding with naked electric core insulating film 61 to it is fixed at naked electric core insulating film 61 overlap joint district rubberizing tape.
And connecting the laser connecting part 42 of the negative adapter plate and the inner surface of the negative pole post 1 of the negative pole top cover 200 together in a laser welding mode.
Bending the negative adapter plate 400 along the negative adapter plate bending groove 43, and aligning the negative top cover 200 and the bare cell 500 in the middle.
Insert naked electric core 500 in aluminum hull 100, during exerting pressure and imbedding negative pole top cap 200 into aluminum hull 100, negative pole top cap 200 surface links together negative pole top cap 200 and aluminum hull 100 through the laser welding mode with the casing 12 terminal surface parallel and level of aluminum hull 100.
And connecting the positive pole boss 13 and the positive pole adapter plate laser connecting part 32 together from outside to inside in a laser welding mode.
And (4) carrying out vacuum drying and cooling on the semi-finished square aluminum shell power battery.
Electrolyte is added into the semi-finished square aluminum shell power battery through the liquid injection hole 14 of the aluminum shell 100.
And performing conventional manufacturing process operations such as soaking, formation, aging and the like on the semi-finished product square aluminum shell power battery after liquid injection.
Utilize annotate liquid hole sealed nail and the 14 nested connections in notes liquid hole of aluminum hull 100 to link together through the laser welding mode, form a square aluminum hull power battery of integrated top cap.
The foregoing disclosure and teachings of the present invention are not intended to limit the present invention in any manner. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (6)
1. The utility model provides a square aluminum hull of integrated top cap which characterized in that: after the aluminum shell is punched and formed, a shell cover area is punched to form a positive pole boss, a liquid injection hole and an explosion-proof valve mounting hole, and an explosion-proof valve is mounted in the explosion-proof valve mounting hole to form the aluminum shell of the integrated top cover structure.
2. The utility model provides a power battery, includes aluminum hull, negative pole top cap, anodal switching piece, negative pole switching piece, naked electric core, top cap insulating film, naked electric core insulating film, electrolyte and annotates the sealed nail of liquid hole, its characterized in that: the aluminum case is the square aluminum case of the integrated top cover of claim 1.
3. The power cell of claim 2, wherein: the negative pole top cap includes apron, negative pole post subassembly, and wherein the negative pole post subassembly includes negative pole post, negative pole post injection molding, negative pole post seal insulation, and the negative pole post subassembly is installed on the apron to it is insulating with the apron.
4. The power cell of claim 2, wherein: the both ends of naked electric core are derived respectively and are had naked electric core anodal utmost point ear, naked electric core negative pole utmost point ear.
5. The power cell of claim 2, wherein: the positive pole switching piece adopts the aluminum sheet to fold into double-deck T style of calligraphy, and its opening is positive pole switching piece supersound connecting portion, and plane portion is positive pole switching piece laser connecting portion, and positive pole switching piece supersound connecting portion are in the same place with naked electric core anodal utmost point ear welding, and positive pole switching piece laser connecting portion are in the same place with the anodal post boss welding of aluminum hull.
6. The power cell of claim 2, wherein: the negative pole switching piece adopts the copper sheet to fold into the right angle type, and the minor face is negative pole switching piece supersound connecting portion, and the long limit is negative pole switching piece laser connecting portion, has negative pole switching piece recess of bending in negative pole switching piece laser connecting portion main part, and negative pole switching piece supersound connecting portion are in the same place with naked electric core negative pole utmost point ear welding, and negative pole switching piece laser connecting portion are in the same place with the welding of the negative pole utmost point post of negative pole top cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120905780.XU CN214411328U (en) | 2021-04-29 | 2021-04-29 | Square aluminum shell integrated with top cover and power battery thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120905780.XU CN214411328U (en) | 2021-04-29 | 2021-04-29 | Square aluminum shell integrated with top cover and power battery thereof |
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| CN214411328U true CN214411328U (en) | 2021-10-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115332719A (en) * | 2022-10-12 | 2022-11-11 | 深圳海润新能源科技有限公司 | Top cover assembly, battery and preparation method of battery |
| CN116053718A (en) * | 2023-03-31 | 2023-05-02 | 广汽埃安新能源汽车股份有限公司 | Battery monomer structure, power battery package and consumer |
-
2021
- 2021-04-29 CN CN202120905780.XU patent/CN214411328U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115332719A (en) * | 2022-10-12 | 2022-11-11 | 深圳海润新能源科技有限公司 | Top cover assembly, battery and preparation method of battery |
| CN115332719B (en) * | 2022-10-12 | 2023-08-04 | 深圳海辰储能控制技术有限公司 | Top cover assembly, battery and preparation method of battery |
| CN116053718A (en) * | 2023-03-31 | 2023-05-02 | 广汽埃安新能源汽车股份有限公司 | Battery monomer structure, power battery package and consumer |
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