CN213692203U - Lithium battery top cover assembly and lithium battery - Google Patents
Lithium battery top cover assembly and lithium battery Download PDFInfo
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- CN213692203U CN213692203U CN202022345604.3U CN202022345604U CN213692203U CN 213692203 U CN213692203 U CN 213692203U CN 202022345604 U CN202022345604 U CN 202022345604U CN 213692203 U CN213692203 U CN 213692203U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a lithium battery top cover component and lithium battery, which relates to the technical field of energy storage batteries, wherein the lithium battery top cover component comprises a first pole, a second composite pole component, a second pole hole, a safety valve and a top cover light plate, wherein the first pole, the safety valve and the second pole hole are arranged on the top cover light plate and are integrally formed by punching the top cover light plate; the lithium cell includes above-mentioned battery top cap subassembly, still includes that first battery rolls up core and second battery and rolls up the core, the utmost point ear that first battery rolled up the core with first utmost point post connection piece ultrasonic welding realizes the electricity and connects, the utmost point ear that the core was rolled up to the second battery with the compound utmost point post connection piece ultrasonic welding of second realizes the electricity and connects. And an integrated stamping mode is adopted to reduce the complex assembly process and improve the safety performance of the safety valve.
Description
Technical Field
The utility model relates to an energy storage battery technical field, concretely relates to lithium cell top cap subassembly and lithium cell.
Background
With the rapid development of 5G, energy storage, electric vehicles, Internet of things and the like, the application of lithium ion batteries in the fields is more and more extensive. The safety, reliability, high specific energy, life and cost of lithium ion batteries also force people to make more rational choices.
The power battery top cover structure comprises an injection molding structure, a welding and injection molding structure and the like, and the pole column structure of the top cover structure is complex, the processing technology is complex, and the cost of the power battery top cover is higher. Through patent retrieval, the battery top cover structures in patent documents CN211376681U and CN110233215A are formed by assembling one end of a pole with a through hole and the pole is assembled through the through hole, and the structure needs to open the battery top cover, so that a complex assembly process is added, and the consumed material cost is increased.
Therefore, the lithium ion battery top cover has too many parts and complex assembly production and process, which results in poor consistency of the cover plate.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved by the utility model
To the complicated technical problem of battery top cap subassembly assembly process, the utility model provides a lithium cell top cap subassembly and lithium cell, it adopts integrative stamping forming method to reduce loaded down with trivial details assembly process, has improved the work efficiency of lithium cell top cap subassembly processing.
2. Technical scheme
In order to solve the above problem, the utility model provides a technical scheme does:
the utility model provides a lithium battery top cap subassembly, includes first utmost point post, the compound utmost point post subassembly of second, second utmost point post hole, relief valve and top cap worn-out fur, first utmost point post, relief valve and second utmost point post hole set up on the top cap worn-out fur, by top cap worn-out fur punching press integrated into one piece, the compound utmost point post subassembly of second includes injection moulding's the compound utmost point post of second and the compound utmost point post carriage of second, the compound utmost point post of second is fixed in through the compound utmost point post carriage of second the second is downthehole. First utmost point post, relief valve and the second utmost point post hole on the top cap worn-out fur are by stamping equipment one-time stamping forming, and the nick of relief valve is formed by the direct punching press of stamping workpiece, and the frame of the compound utmost point post bearer frame of second bears the compound utmost point post of second to it is downthehole to fix the compound utmost point post of second to the second utmost point post, prevents that the compound utmost point post of second from splines because of receiving torsion rotation. The second composite pole is directly formed by injection without a sealing ring structural member.
Optionally, a liquid injection hole formed in an integrally punched manner is formed in the top cover light plate, and the liquid injection hole is located on one side of the second pole hole. Annotate the liquid hole and by stamping equipment one-time stamping forming with first utmost point post, relief valve and second utmost point post hole, through annotating the liquid hole, can inject electrolyte into in the battery.
Optionally, the injection molding device further comprises a lower injection molding support, wherein a first pole column hole matched with the second pole column hole and a lower injection molding through hole matched with the injection hole are formed in the lower injection molding support. The lower injection molding support is arranged below the top cover light plate and used for supporting and fixing the top cover light plate, the liquid injection hole and the lower injection molding through hole jointly form a channel for injecting electrolyte into the power battery, and the first pole post hole and the second pole post hole jointly form a channel for fixing the second composite pole post.
Optionally, a plastic part is arranged between the first pole and the lower injection molding support and used for filling the inner space of the first pole. The plastic part is one or a combination of PPS, PBT, PC, PPA and PA. The cavity below the first pole is filled with a plastic piece. The working of plastics plays sealed, insulating, connects and splines the effect such as changes, also plays the effect of connecting top cap worn-out fur and first utmost point post.
Optionally, still include utmost point post coupling assembling for connect the electric core utmost point ear of battery, utmost point post coupling assembling includes first utmost point post connection piece and the compound utmost point post connection piece of second, first utmost point post connection piece surface with the support bottom surface fixed connection is moulded to the lower face that first utmost point post corresponds, the compound utmost point post connection piece surface of second with the support bottom surface fixed connection is moulded to the lower face that the compound utmost point post subassembly of second corresponds. The bottom surfaces of the lower injection molding supports corresponding to the first pole connecting piece surface and the first pole are fixedly connected through laser welding, and the bottom surfaces of the lower injection molding supports corresponding to the second composite pole connecting piece surface and the second composite pole component are fixedly connected through laser welding, so that the pole connecting component is electrically connected with the positive pole lug and the negative pole lug of the battery core.
Optionally, an epoxy resin plate is arranged below the first pole connecting sheet. The internal cavity of the first pole column is fixed with the epoxy resin plate through physical riveting and plastic parts by filling the plastic parts, and the fixed insulating epoxy resin plate can play a role in protecting the first pole column.
Optionally, the material of the side wall surface of the second composite pole is copper, and the material of the top end surface of the second composite pole is aluminum. The side wall surface of the second composite pole is made of copper, the top end surface of the second composite pole is made of aluminum, and the side wall surface and the top end surface are connected through thermal compounding. The thermal composite piece improves the stability and reliability of the copper-aluminum interface.
Optionally, the height and shape of the punch forming of the first pole are consistent with those of the second composite pole. Adopt stamping equipment to carry out the punching press to first utmost point post, first utmost point post stamping forming's height and shape are unanimous with the height and the shape that the compound utmost point post of second formed of moulding plastics, and first utmost point post and the symmetry of the compound utmost point post of second set up on the top cap worn-out fur.
The utility model provides a lithium battery, includes any one of the aforesaid lithium cell top cap subassembly, still include that first battery rolls up core, second battery roll up core and aluminum hull casing, the utmost point ear that first battery rolled up the core with first utmost point post connection piece supersound electricity is connected, the utmost point ear that the second battery rolled up the core with the compound utmost point post connection piece supersound electricity of second is connected, first battery rolls up the core and the second battery rolls up the core and packs into in the aluminum hull casing. Roll up the core with first battery and roll up the core with the second battery and pack into in the aluminum hull casing, the core utmost point ear ultrasonic bonding is rolled up with first battery through first utmost point post connection piece to lithium cell roof subassembly inside, and core utmost point ear ultrasonic bonding is rolled up with the second battery to the core utmost point ear ultrasonic bonding is rolled up to the compound utmost point post connection piece of second to realize lithium cell roof subassembly and battery electricity's electricity and be connected. After the electric connection is completed, the top cover light plate and the aluminum shell are sealed through laser welding, and the laser welding sealing can ensure the connection sealing of the aluminum shell and the lithium battery top cover component.
3. Advantageous effects
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
(1) the embodiment of the utility model provides a first utmost point post, relief valve and second utmost point post hole on the top cap worn-out fur are by stamping equipment one-time stamping forming, and the nick of relief valve is formed by the direct punching press of stamping workpiece, and the compound utmost point post of second is born the weight of the frame of the compound utmost point post bearer frame of second to it is downthehole to fix the compound utmost point post of second to second utmost point post, prevent that the compound utmost point post of second from rotating because of receiving torsion and spline. The second composite pole is directly formed by injection without a sealing ring structural member.
(2) The embodiment of the utility model provides a first utmost point post and relief valve all adopt the shaping of punching press integral type, and reducible first utmost point post loaded down with trivial details assembly process and higher material originally, and the first utmost point post boss that the punching press goes out is equipotential with lithium cell aluminum hull casing, guarantees the uniformity of internal resistance, voltage being connected with aluminum hull casing first utmost point post in the lithium cell life cycle.
(3) Compare in current safety valve block assembly welded processing technology again earlier, the embodiment of the utility model provides a relief valve, by the integrative stamping forming of top cap worn-out fur, both reduced the process and reduced spare part practicality, the relief valve that the punching press came out simultaneously has reduced the manufacturing cost of raw and other materials.
(4) The embodiment of the utility model provides a compound utmost point post subassembly of second, the lateral wall face material of the compound utmost point post of second is copper, and top face material is aluminium, realizes the connection of lateral wall face and top face through thermal recombination. The thermal composite piece improves the stability and reliability of the copper-aluminum interface.
(5) The embodiment of the utility model provides a top cap subassembly passes through ultrasonic welding and realizes the electricity with the utmost point ear realization of battery roll core to be connected, passes through laser welding with top cap worn-out fur and aluminum hull casing and seals, and the laser welding is sealed can guarantee the connection of aluminum hull casing and lithium battery top cap subassembly sealed.
Drawings
Fig. 1 is a schematic view of an embodiment of the present invention, illustrating a lithium battery top cover assembly and an explosion structure of a lithium battery.
Fig. 2 is a schematic structural diagram of a lithium battery top cap assembly provided by an embodiment of the present invention.
The symbols in the drawings illustrate that:
1. a first pole column; 2. a second composite pole assembly; 21. a second composite pole; 211. a side wall surface; 212. a top end face; 22. a second composite pole bearing frame; 3. a second pole post hole; 4. a safety valve; 5. a top cover light panel; 6. a liquid injection hole; 7. a lower injection molding bracket; 71. pole hole I; 72. a lower injection molding through hole; 8. a plastic part; 9. a pole connecting assembly; 91. a first pole connecting sheet; 92. a second composite pole connecting sheet; 10. an epoxy board; 11. a first battery roll core; 12. a second battery roll core; 13. an aluminum shell.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and between the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, which is all within the scope of the present invention.
Example 1
As shown in fig. 1-2, the embodiment provides a lithium battery top cap assembly, which includes a first pole post 1, a second composite pole post assembly 2, a second pole post hole 3, a safety valve 4, and a top cap light plate 5, where the first pole post 1, the safety valve 4, and the second pole post hole 3 are disposed on the top cap light plate 5 and are integrally formed by stamping the top cap light plate 5, the second composite pole post assembly 2 includes a second composite pole post 21 and a second composite pole post carrier frame 22, and the second composite pole post 21 is fixed in the second pole post hole 3 through the second composite pole post carrier frame 22.
In this embodiment, first utmost point post 1, relief valve 4 and second utmost point post hole 3 on the top cap worn-out fur piece 5 are by stamping equipment one-time stamping forming, and the nick of relief valve 4 is formed by the direct punching press of stamping workpiece, and the frame of the compound utmost point post bearer frame 22 of second bears the compound utmost point post 21 of second to in fixed the compound utmost point post hole 3 of second with the compound utmost point post 21 of second, prevent that the compound utmost point post 21 of second from stopping the commentaries on classics because of receiving the torsion rotation. The second composite post 21 is formed by direct injection molding without a seal ring structure.
As shown in fig. 1-2, in an alternative embodiment, the top cover light plate 5 is provided with a liquid injection hole 6 formed by punching and integral molding, and the liquid injection hole 6 is positioned at one side of the second pole hole 3. Annotate liquid hole 6 and first utmost point post 1, relief valve 4 and second utmost point post hole 3 and by stamping equipment one-time stamping forming, through annotating liquid hole 6, can inject electrolyte into the battery.
As shown in fig. 1-2, in an alternative embodiment, the injection molding device further includes a lower injection molding bracket 7, and the lower injection molding bracket 7 is provided with a first pole hole 71 matched with the second pole hole 3, and a lower injection molding through hole 72 matched with the injection hole 6. The lower injection molding support 7 is arranged below the top cover light plate 5, the lower injection molding support 7 is used for supporting and fixing the top cover light plate 5, the liquid injection hole 6 and the lower injection molding through hole 72 jointly form a channel for injecting electrolyte into the power battery, and the first pole post hole 71 and the second pole post hole 3 jointly form a channel for fixing the second composite pole post 21.
As shown in fig. 1-2, in an alternative embodiment, a plastic part 8 is disposed between the first pole post 1 and the lower injection-molded bracket 7, and is used for filling the inner space of the first pole post 1. The plastic part 8 is formed by compounding resin PPS, PBT, PC, PPA and PA materials. The cavity below the first pole 1 is filled with a plastic part 8. The working of plastics 8 plays sealed, insulating, connect and effect such as splines, also plays the effect of connecting top cap worn-out fur 5 and first utmost point post 1.
As shown in fig. 1-2, in an optional embodiment, the battery further includes a pole connecting assembly 9 for connecting a battery core tab of the battery, the pole connecting assembly 9 includes a first pole connecting piece 91 and a second composite pole connecting piece 92, a surface of the first pole connecting piece 91 is fixedly connected to a bottom surface of the lower injection molding support 7 corresponding to the first pole 1, and a surface of the second composite pole connecting piece 92 is fixedly connected to a bottom surface of the lower injection molding support 7 corresponding to the second composite pole assembly 2. The surface of the first pole connecting piece 91 is fixedly connected with the bottom surface of the lower injection molding support 7 corresponding to the first pole 1 through laser welding, and the surface of the second composite pole connecting piece 92 is fixedly connected with the bottom surface of the lower injection molding support 7 corresponding to the second composite pole assembly 2 through laser welding, so that the electric connection between the pole connecting assembly 9 and the positive and negative pole lugs of the battery core is realized.
As shown in fig. 1-2, in an alternative embodiment, an epoxy resin plate 10 is disposed below the first pole connecting piece 91. The cavity inside the first pole column 1 is fixed with the epoxy resin plate 10 through the buckle and the plastic part 8 by filling the plastic part 8, and the fixed insulating epoxy resin plate 10 can play a role in protecting the first pole column 1.
As shown in fig. 1-2, in an alternative embodiment, the material of the side wall surface 211 of the second composite post 21 is copper, and the material of the top end surface 212 of the second composite post 21 is aluminum. The side wall surface 211 of the second composite pole 21 is made of copper, the top end surface 212 is made of aluminum, and the side wall surface 211 and the top end surface 212 are connected through thermal compounding. The thermal composite piece improves the stability and reliability of the copper-aluminum interface.
As shown in fig. 1-2, in an alternative embodiment, the height and shape of the first pole 1 formed by stamping are the same as the height and shape of the second composite pole 21. Adopt stamping equipment to carry out the punching press to first utmost point post 1, the height and the shape of first utmost point post 1 stamping forming are unanimous with the height and the shape that the compound utmost point post 21 of second was moulded plastics and is formed, and first utmost point post 1 and the symmetry of the compound utmost point post 21 of second set up on top cap worn-out fur piece 5.
Example 2
As shown in fig. 1, this embodiment provides a lithium battery, including any one of the technical solutions of embodiment 1, the lithium battery top cap assembly further includes a first battery roll core 11, a second battery roll core 12 and an aluminum shell casing 13, a tab of the first battery roll core 11 is ultrasonically and electrically connected to the first pole connecting sheet 91, a tab of the second battery roll core 12 is ultrasonically and electrically connected to the second composite pole connecting sheet 92, and the aluminum shell casing 13 is used for being assembled into the first battery roll core 11 and the second battery roll core 12.
In this embodiment, roll up core 11 and second battery with first battery and roll up core 12 and pack into in aluminum hull casing 13, core 11 utmost point ear ultrasonic bonding is rolled up with first battery through first utmost point post connection piece 91 to lithium battery top cap subassembly inside, and core 12 utmost point ear ultrasonic bonding is rolled up with the second battery to second compound utmost point post connection piece 92 to realize lithium battery top cap subassembly and battery electricity and be connected. After the electric connection is completed, the top cover light plate 5 and the aluminum shell 13 are sealed through laser welding, and the laser welding sealing can ensure that the aluminum shell 13 and the lithium battery top cover assembly are connected and sealed.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (10)
1. A lithium battery top cap subassembly which characterized in that: comprises a first pole, a second composite pole component, a second pole hole, a safety valve and a top cover light plate,
the first pole, the safety valve and the second pole hole are arranged on the top cover light plate and are integrally formed by stamping the top cover light plate,
the second composite pole component comprises a second composite pole and a second composite pole bearing frame which are formed by injection molding,
the second composite pole is fixed in the second pole hole through the second composite pole bearing frame.
2. The lithium battery cap assembly of claim 1, wherein: and the top cover light plate is provided with a stamping and integrally-formed liquid injection hole which is positioned on one side of the second pole hole.
3. The lithium battery cap assembly of claim 2, wherein: also comprises a lower injection molding bracket,
and the lower injection molding support is provided with a first pole column hole matched with the second pole column hole and a lower injection molding through hole matched with the liquid injection hole.
4. The lithium battery cap assembly of claim 3, wherein: and a plastic part is arranged between the first pole and the lower injection molding support and used for filling the inner space of the first pole.
5. The lithium battery cap assembly of claim 4, wherein: also comprises a pole connecting component used for connecting the battery core pole ear of the battery,
the pole connecting component comprises a first pole connecting sheet and a second composite pole connecting sheet,
the surface of the first pole connecting sheet is fixedly connected with the bottom surface of the lower injection molding bracket corresponding to the first pole,
and the surface of the second composite pole connecting sheet is fixedly connected with the bottom surface of the lower injection molding support corresponding to the second composite pole assembly.
6. The lithium battery cap assembly of claim 5, wherein: and an epoxy resin plate is arranged below the first pole connecting sheet.
7. The lithium battery cap assembly of claim 1, wherein: the side wall surface of the second composite pole is made of copper, and the top end surface of the second composite pole is made of aluminum.
8. The lithium battery cap assembly of claim 1, wherein: the height and the shape of the punch forming of the first pole are consistent with those of the second composite pole.
9. A lithium battery, characterized in that: the lithium battery top cap assembly of any of claims 1-8, further comprising a first battery roll core and a second battery roll core,
the pole ear of the first battery roll core is ultrasonically and electrically connected with the first pole connecting sheet,
and the lug of the second battery roll core is ultrasonically and electrically connected with the second composite pole connecting sheet.
10. A lithium battery as claimed in claim 9, characterized in that: the battery winding core also comprises an aluminum shell which is used for being filled with the first battery winding core and the second battery winding core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022345604.3U CN213692203U (en) | 2020-10-20 | 2020-10-20 | Lithium battery top cover assembly and lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022345604.3U CN213692203U (en) | 2020-10-20 | 2020-10-20 | Lithium battery top cover assembly and lithium battery |
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| CN213692203U true CN213692203U (en) | 2021-07-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421154A (en) * | 2020-10-20 | 2021-02-26 | 浙江南都电源动力股份有限公司 | Lithium battery top cover assembly, lithium battery and preparation method of lithium battery |
| SE2330173A1 (en) * | 2022-10-17 | 2024-04-18 | Ningbo Zhenyu Tech Co Ltd | Method for stamping and integrally molding top cover sheet, battery top cover structure and manufactoring method thereof |
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2020
- 2020-10-20 CN CN202022345604.3U patent/CN213692203U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421154A (en) * | 2020-10-20 | 2021-02-26 | 浙江南都电源动力股份有限公司 | Lithium battery top cover assembly, lithium battery and preparation method of lithium battery |
| SE2330173A1 (en) * | 2022-10-17 | 2024-04-18 | Ningbo Zhenyu Tech Co Ltd | Method for stamping and integrally molding top cover sheet, battery top cover structure and manufactoring method thereof |
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