CN113437412A - Novel top cover assembly structure for lithium ion battery cell - Google Patents
Novel top cover assembly structure for lithium ion battery cell Download PDFInfo
- Publication number
- CN113437412A CN113437412A CN202110646286.0A CN202110646286A CN113437412A CN 113437412 A CN113437412 A CN 113437412A CN 202110646286 A CN202110646286 A CN 202110646286A CN 113437412 A CN113437412 A CN 113437412A
- Authority
- CN
- China
- Prior art keywords
- hole
- lithium ion
- copper ring
- riveting
- pole
- 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
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 35
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 62
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000003466 welding Methods 0.000 claims abstract description 39
- 210000001503 joint Anatomy 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 7
- 230000035515 penetration Effects 0.000 claims description 6
- 230000000284 resting effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 238000004080 punching Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Images
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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/154—Lid or cover comprising an axial bore for receiving a central current collector
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a novel top cover assembly structure for a lithium ion cell, which comprises a smooth aluminum sheet, an aluminum block and a butt joint structure, wherein the smooth aluminum sheet is provided with a first through hole; the aluminum block is provided with a second through hole corresponding to the first through hole; the butt joint structure at least comprises a pole and a riveting copper ring, wherein the pole sequentially penetrates through the first through hole and the second through hole and is connected with the riveting copper ring; the riveting copper ring is embedded in the second through hole and connected with the aluminum block. The structure cancels friction welding, improves the reliability of the structure and reduces the cost of the top cover assembly.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a novel top cover assembly structure for a lithium ion battery cell.
Background
Lithium ion battery is a secondary battery, mainly rely on lithium ion to remove between anodal and negative pole and discharge, along with the high-speed development of society, the continuous improvement of science and technology level, lithium ion battery has obtained extensive application, on digital product, unmanned aerial vehicle and electric automobile, the lithium ion battery's that can both see shadow, and the top cap subassembly for the lithium ion cell is the important part that lithium ion battery constitutes, but there are many problems or defects in the current novel top cap subassembly structure for the lithium ion cell:
traditional novel top cap subassembly structure for lithium ion cell adopts the friction welding process more in-service use, and the friction welding process is with high costs, and the quality is unstable, has certain risk.
Disclosure of Invention
The invention aims to provide a novel top cover assembly structure for a lithium ion battery cell, and aims to solve the problem that the novel top cover assembly structure for the lithium ion battery cell is high in cost in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a novel top cover assembly structure for a lithium ion cell comprises a smooth aluminum sheet, an aluminum block and a butt joint structure, wherein the smooth aluminum sheet is provided with a first through hole; the aluminum block is provided with a second through hole corresponding to the first through hole; the butt joint structure at least comprises a pole 6a and a riveting copper ring, wherein the pole sequentially penetrates through the first through hole and the second through hole and is connected with the riveting copper ring; the riveting copper ring is embedded in the second through hole and connected with the aluminum block.
And the riveting copper ring, the pole and the aluminum block are connected through riveting.
Specifically, the aluminum block is formed by punching, the riveting copper ring is formed by punching a copper plate, and the pole is machined and manufactured by copper materials. During riveting, the aluminum block, the pole and the riveting copper ring are assembled in the sequence, and in the riveting process, the three are riveted and fixed in a riveting mode, so that the three are tightly matched.
Preferably, the joint of the riveting copper ring and the pole is fused by laser welding (a copper laser welding pool is formed at the joint); and the joint of the riveting copper ring and the aluminum block is fused by laser welding (a copper-aluminum laser welding pool is formed at the joint).
Specifically, after the three components are riveted and connected, laser welding is further carried out, so that the assembled joint is fused by welding. The purpose of laser welding is that although the three parts are connected by riveting, the internal resistance of the structure is larger, and laser welding can further fuse and connect the three parts, thereby reducing the internal resistance.
Preferably, the novel top cover assembly structure for the lithium ion cell further comprises a base arranged below the smooth aluminum sheet, and the base is provided with a third through hole for the pole to pass through; the lower end part of the pole is provided with a limit bottom block matched with the base, so that when the pole penetrates through the third through hole, the limit bottom block is clamped on the lower end surface of the base.
Specifically, the pole column sequentially penetrates through the third through hole, the first through hole and the second through hole and is connected with the riveting copper ring in a matched mode.
Preferably, the upper end of riveting copper ring is equipped with the bellied step portion in outside, the step portion configuration is to cooperateing with the aluminium pig, when riveting copper ring and utmost point post butt joint are during, the step portion is shelved on the aluminium pig.
Preferably, a table-board 302 for placing the step part of the riveting copper ring is arranged in the second through hole of the aluminum block.
Preferably, the terminal is provided with a circle of butt joint grooves which are sunken inwards relative to the side wall surface, and the inner side of the lower end part of the riveting copper ring is provided with a butt joint part matched with the butt joint grooves of the terminal, so that the riveting copper ring and the terminal 6a are buckled to form a butt joint structure.
Preferably, the novel top cover assembly structure for the lithium ion cell further comprises a limiting structure, wherein the limiting structure is provided with a placing groove for placing an aluminum block, the placing groove is provided with a fourth through hole corresponding to the second through hole of the aluminum block, and the fourth through hole is used for a pole to pass through.
Preferably, novel top cap subassembly structure for lithium ion cell still includes the sealing washer, the sealing washer cover is established on utmost point post, and the sealing washer is close to the one end and the cooperation of light aluminum sheet and is connected.
Preferably, the base and the limiting structure are made of plastic.
Preferably, the stepped portion has a circular shape.
Preferably, the thickness of the riveting copper ring is 0.5mm, and the thickness of the weak part of the riveting copper ring after riveting is 0.3 mm.
Preferably, the riveting copper ring and the terminal are preferably in a Cu T2O state, the aluminum block is preferably in an Al 1060O state, the laser welding penetration at the copper laser welding pool is preferably not less than 0.5mm, and the laser welding penetration at the copper aluminum laser welding pool is preferably not less than 0.5 mm.
Compared with the prior art, the invention has the beneficial effects that: the novel top cover component structure for the lithium ion battery cell not only realizes lower cost of the top cover component, but also realizes the limiting function among parts and longer service life;
(1) the riveting part is formed by mutually matching and connecting the riveting copper ring, the aluminum block and the pole, the three parts are closely matched in structure by a riveting mode, and finally the three parts are connected together by laser welding, so that the friction welding is cancelled, the reliability of the structure is improved, and the cost of the top cover assembly is reduced;
(2) the size through the standing groove is unanimous with the size of aluminium piece, can establish the bottom at the aluminium piece with last plastic cover, restricts the position of aluminium piece, can prevent that the aluminium piece from taking place the phenomenon of skew in the equipment process to make novel top cap subassembly structure for lithium ion cell have limit function.
Drawings
FIG. 1 is an exploded view of the structure of a header assembly according to the present invention;
FIG. 2 is a schematic front view of the structure of the cover assembly according to the present invention;
FIG. 3 is a schematic view of a laser weld site of the header assembly construction provided by the present invention;
FIG. 4 is a schematic view of a docking structure of the header assembly structure provided by the present invention;
fig. 5 is a schematic structural view of an aluminum block of the top cover assembly structure provided by the present invention.
Description of reference numerals:
1, polishing an aluminum sheet; 101 a first via hole; 2, a limiting structure, 201 placing grooves and 202 fourth through holes; 3, an aluminum block, 301 a second through hole and 302 a table board; 4, sealing rings; 5 base, 501 third through hole; 6, a butt joint structure; 6a pole, 6b riveting copper ring; 6a-1 butt joint groove, 6a-2 limit bottom block, 6b-1 step part and 6b-2 butt joint part; 7, welding a molten pool by copper laser; 8 copper aluminum laser welding pool.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, an embodiment of the present invention includes: a novel top cover assembly structure for a lithium ion cell comprises a smooth aluminum sheet 1, an aluminum block 3 and a butt joint structure 6, wherein the smooth aluminum sheet 1 is provided with a first through hole 101; the aluminum block 3 is provided with a second through hole 301 corresponding to the first through hole 101; the butt joint structure 6 at least comprises a pole 6a and a riveting copper ring 6b, wherein the pole 6a sequentially penetrates through the first through hole 101 and the second through hole 301 and is connected with the riveting copper ring 6 b; the caulking copper ring 6b is fitted into the second through hole 301 and connected to the aluminum block 3.
In this embodiment, the riveting copper ring 6b, the pole 6a, and the aluminum block 3 are connected by riveting. The aluminum block 3 is formed by punching, the riveting copper ring 6b is formed by punching a copper plate, and the pole 6a is manufactured by machining a copper material. During riveting, the aluminum block 3, the pole 6a and the riveting copper ring 6b are assembled in the above sequence, and in the riveting process, the three are riveted and fixed in a riveting mode, so that the three are tightly matched.
In the embodiment, the joint of the riveting copper ring 6b and the pole 6a is fused by laser welding, namely a copper laser welding pool 7 is formed at the joint; the joint of the riveting copper ring 6b and the aluminum block 3 is fused by laser welding, namely a copper-aluminum laser welding pool 8 is formed at the joint.
Specifically, after the three components are riveted and connected, laser welding is further carried out, so that the assembled joint is fused by welding. The purpose of laser welding is that although the three parts are connected by riveting, the internal resistance of the structure is larger, and laser welding can further fuse and connect the three parts, thereby reducing the internal resistance.
In this embodiment, the novel cap assembly structure for a lithium ion battery cell further includes a base 5 disposed below the polished aluminum sheet 1, and the base 5 is provided with a third through hole 501 for passing the pole 6 a; the lower end part of the pole 6a is provided with a limit bottom block 6a-2 matched with the base 5, so that when the pole 6a passes through the third through hole 501, the limit bottom block 6a-2 is clamped on the lower end surface of the base 5.
In the embodiment, the upper end of the riveting copper ring 6b is provided with a step part 6b-1 protruding outwards, the step part 6b-1 is configured to be matched with the aluminum block 3, and when the riveting copper ring 6b is in butt-joint fit with the pole 6a, the step part 6b-1 rests on the aluminum block 3.
In this embodiment, a mesa for placing the stepped portion 6b-1 of the riveting copper ring is arranged in the second through hole 301 of the aluminum block 3; the step portion 6b-1 has a circular shape.
In this embodiment, the terminal post 6a is provided with a circle of abutting grooves 6a-1 which are recessed inwards relative to the side wall surface, and the inner side of the lower end of the riveting copper ring 6b is provided with an abutting portion 6b-2 which is matched with the abutting grooves 6a-1 of the terminal post 6a, so that the riveting copper ring 6b and the terminal post 6a are buckled to form the abutting structure 6.
In this embodiment, the novel top cap assembly structure for the lithium ion battery cell further includes a limiting structure 2, the limiting structure 2 is provided with a placing groove 201 for placing the aluminum block 3, the placing groove 201 is provided with a fourth through hole 202 corresponding to the second through hole 301 of the aluminum block 3, and the fourth through hole 202 is used for the pole 6a to pass through.
In this embodiment, novel top cap subassembly structure for lithium ion cell still includes sealing washer 4, 4 covers of sealing washer are established on utmost point post 6a, and sealing washer 4 is close to the one end and the cooperation of light aluminum sheet 1 and is connected.
In this embodiment, the base 5 and the limiting structure 2 are made of plastic.
In this embodiment, the thickness of the riveting copper ring 6b is 0.5mm, and the thickness of the weak part of the riveting copper ring 6b after riveting is 0.3 mm. The riveting copper ring 6b and the pole 6a are preferably in a Cu T2O state, the aluminum block 3 is preferably in an Al 1060O state, the laser welding penetration at the copper laser welding pool 7 is preferably not less than 0.5mm, and the laser welding penetration at the copper aluminum laser welding pool 8 is preferably not less than 0.5 mm. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a novel top cap subassembly structure for lithium ion cell, includes smooth aluminum sheet, aluminium pig and butt joint structure, its characterized in that: the smooth aluminum sheet is provided with a first through hole; the aluminum block is provided with a second through hole corresponding to the first through hole; the butt joint structure at least comprises a pole and a riveting copper ring, wherein the pole sequentially penetrates through the first through hole and the second through hole and is connected with the riveting copper ring; the riveting copper ring is embedded in the second through hole and connected with the aluminum block.
2. The novel top cover assembly structure for the lithium ion battery cell of claim 1, wherein the riveted copper ring, the terminal post and the aluminum block are connected by riveting.
3. The novel top cover assembly structure for the lithium ion battery cell according to claim 2, wherein a joint of the riveting copper ring and the pole is fused by laser welding to form a copper laser welding pool; and the joint of the riveting copper ring and the aluminum block is fused by laser welding to form a copper-aluminum laser welding pool.
4. The novel cap assembly structure for the lithium ion battery cell of claim 1, further comprising a base disposed below the smooth aluminum sheet, wherein the base is provided with a third through hole for a pole to pass through; the lower end part of the pole is provided with a limit bottom block matched with the base, so that when the pole penetrates through the third through hole, the limit bottom block is clamped on the lower end surface of the base.
5. The novel top cover assembly structure for the lithium ion battery cell as claimed in claim 1, wherein the upper end of the riveting copper ring is provided with a step part protruding outwards, the step part is configured to be matched with an aluminum block, and when the riveting copper ring is in butt joint with a pole, the step part rests on the aluminum block.
6. The novel top cover assembly structure for the lithium ion battery cell as claimed in claim 5, wherein a table top for resting a riveting copper ring step is arranged in the second through hole.
7. The structure of the novel top cap assembly for the lithium ion battery cell as claimed in claim 6, wherein the post has a circle of butt-joint grooves with opposite side walls recessed inwards, and the inner side of the lower end of the riveting copper ring is provided with a butt-joint portion matched with the butt-joint groove of the post, so that the riveting copper ring and the post are buckled to form a butt-joint structure.
8. The novel top cover assembly structure for the lithium ion battery cell of claim 1, further comprising a limiting structure, wherein the limiting structure is provided with a placing groove for placing an aluminum block, the placing groove is provided with a fourth through hole corresponding to the second through hole of the aluminum block, and the fourth through hole is used for a pole to pass through.
9. The novel top cover assembly structure for the lithium ion battery cell as claimed in claim 3, wherein the riveting copper ring and the terminal are preferably in a Cu T2O state, the aluminum block is preferably in an Al 1060O state, the laser welding penetration at the copper laser welding pool is preferably not less than 0.5mm, and the laser welding penetration at the copper aluminum laser welding pool is preferably not less than 0.5 mm.
10. The novel top cap assembly structure for the lithium ion battery cell of any one of claims 1 to 9, further comprising a sealing ring, wherein the sealing ring is sleeved on the pole, and one end of the sealing ring close to the plain aluminum sheet is connected with the plain aluminum sheet in a matching manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110646286.0A CN113437412A (en) | 2021-06-10 | 2021-06-10 | Novel top cover assembly structure for lithium ion battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110646286.0A CN113437412A (en) | 2021-06-10 | 2021-06-10 | Novel top cover assembly structure for lithium ion battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113437412A true CN113437412A (en) | 2021-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110646286.0A Pending CN113437412A (en) | 2021-06-10 | 2021-06-10 | Novel top cover assembly structure for lithium ion battery cell |
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| Country | Link |
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| CN (1) | CN113437412A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208591A (en) * | 2010-03-30 | 2011-10-05 | Sb锂摩托有限公司 | Secondary battery and secondary battery module |
| CN103298762A (en) * | 2011-02-18 | 2013-09-11 | 肖特公开股份有限公司 | Feed-through |
| CN106299172A (en) * | 2016-09-30 | 2017-01-04 | 合肥力翔电池科技有限责任公司 | A kind of lithium ion battery cover board |
| CN106784445A (en) * | 2017-02-13 | 2017-05-31 | 宁德时代新能源科技股份有限公司 | Power battery top cover structure, power battery and battery module |
| CN107195810A (en) * | 2017-07-06 | 2017-09-22 | 池州市骏智机电科技有限公司 | A kind of electrokinetic cell top cover |
| CN107331827A (en) * | 2017-07-28 | 2017-11-07 | 深圳市欣迪盟新能源科技股份有限公司 | A kind of battery cover plate structure |
| CN211480092U (en) * | 2020-02-29 | 2020-09-11 | 武汉富航精密工业有限公司 | Novel lithium battery cover plate structure |
| CN212209651U (en) * | 2020-05-24 | 2020-12-22 | 力创(台山)电子科技有限公司 | Negative electrode riveting aluminum block for power lithium ion battery |
-
2021
- 2021-06-10 CN CN202110646286.0A patent/CN113437412A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208591A (en) * | 2010-03-30 | 2011-10-05 | Sb锂摩托有限公司 | Secondary battery and secondary battery module |
| CN103298762A (en) * | 2011-02-18 | 2013-09-11 | 肖特公开股份有限公司 | Feed-through |
| CN106299172A (en) * | 2016-09-30 | 2017-01-04 | 合肥力翔电池科技有限责任公司 | A kind of lithium ion battery cover board |
| CN106784445A (en) * | 2017-02-13 | 2017-05-31 | 宁德时代新能源科技股份有限公司 | Power battery top cover structure, power battery and battery module |
| CN107195810A (en) * | 2017-07-06 | 2017-09-22 | 池州市骏智机电科技有限公司 | A kind of electrokinetic cell top cover |
| CN107331827A (en) * | 2017-07-28 | 2017-11-07 | 深圳市欣迪盟新能源科技股份有限公司 | A kind of battery cover plate structure |
| CN211480092U (en) * | 2020-02-29 | 2020-09-11 | 武汉富航精密工业有限公司 | Novel lithium battery cover plate structure |
| CN212209651U (en) * | 2020-05-24 | 2020-12-22 | 力创(台山)电子科技有限公司 | Negative electrode riveting aluminum block for power lithium ion battery |
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Application publication date: 20210924 |