CN213184430U - Secondary battery cover plate and lithium ion battery - Google Patents
Secondary battery cover plate and lithium ion battery Download PDFInfo
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- CN213184430U CN213184430U CN202022747901.0U CN202022747901U CN213184430U CN 213184430 U CN213184430 U CN 213184430U CN 202022747901 U CN202022747901 U CN 202022747901U CN 213184430 U CN213184430 U CN 213184430U
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- cover plate
- secondary battery
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- top cover
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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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Abstract
Secondary cell apron and lithium ion battery, including top cap piece, a pair of utmost point post subassembly and a pair of go-between, be equipped with a pair of mounting hole on the top cap piece, every utmost point post subassembly is connected in a mounting hole through a go-between. The utility model relates to a secondary battery apron increases the bulk strength of apron utmost point post structure through the inseparable combination between top cap piece, go-between and the utmost point post subassembly.
Description
Technical Field
The utility model belongs to the power battery field, more specifically relates to a secondary battery apron and lithium ion battery.
Background
At present, the lithium ion power battery is widely applied to the fields of computers, mobile phones and the like due to the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, has a wide application prospect in electric vehicles such as electric bicycles, electric automobiles and the like and energy storage facilities along with the maturity of manufacturing technology, and can effectively solve global problems such as environmental pollution, energy crisis and the like due to the wide application of the power battery.
The power battery top cover applied in the market at present usually comprises: the top cover plate is provided with two mounting holes, the positive pole column and the negative pole column are arranged in the mounting holes in a penetrating mode, the positive conductive injection molding piece on the periphery of the positive pole column is sleeved, the negative insulating injection molding piece on the periphery of the negative pole column is sleeved, and the welding aluminum block is welded on the end face of the top cover plate. After the end face of one end of the welding aluminum block is welded with the top cover plate, the sealing ring is directly pressed on the other end face of the welding aluminum block, so that the stress on the welding position is large, and a large air leakage risk exists; the welded aluminum block and the plastic part are not connected, so that the whole pressure resistance of the cover plate pole structure is lower. Therefore, it is necessary to develop a secondary battery cover plate to improve the overall strength of the cover plate post.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a secondary battery apron and lithium ion battery improve the bulk strength of apron utmost point post.
In order to achieve the above object, the utility model provides a secondary battery apron, including top cap piece, a pair of utmost point post subassembly and a pair of go-between, be equipped with a pair of mounting hole on the top cap piece, every utmost point post subassembly connects in one through a go-between in the mounting hole.
Preferably, the connecting ring includes a main body and an extension, the main body is an annular sheet, the extension is a cylindrical shape and is vertically connected to the main body, the main body is connected to the bottom side of the top cover plate, and the extension penetrates through the mounting hole to the position above the top cover plate.
Preferably, the extension portion is provided with a plurality of through holes in a circumferential direction.
Preferably, each pole post assembly comprises a pole post and an injection molding part, the pole post is arranged in the extension part and connected in the mounting hole through the connecting ring, gaps are formed between the pole post and the connecting ring and between the connecting ring and the top cover plate, and the injection molding part is formed by injection molding in the gaps and the through holes and fills the gaps and wraps the extension part.
Preferably, the pair of pole assemblies comprises a positive pole assembly and a negative pole assembly, the injection molding part of the negative pole assembly is made of insulating plastic, and the injection molding part of the positive pole assembly has a resistance value.
Preferably, a sealing member is arranged between the pole and the connecting ring.
Preferably, the periphery of utmost point post is equipped with the snap ring, the axial cross-section of sealing member is the L type, including interconnect's horizontal portion and perpendicular portion, the horizontal portion locate the snap ring with between the go-between, perpendicular portion locate the periphery of utmost point post with between the inner periphery of go-between.
Preferably, the explosion-proof valve is further included, an explosion-proof valve through hole is formed in the top cover plate, and the explosion-proof valve is connected into the explosion-proof valve through hole.
Preferably, still include down the plastic part, down the plastic part through rubberizing, hot melt or ultrasonic welding laminating connect in the bottom of top cap piece, utmost point post passes down the plastic part.
The utility model also provides a lithium ion battery, including foretell secondary battery apron.
The utility model relates to a secondary battery apron, its beneficial effect lies in: the whole strength of the cover plate pole column structure is increased by tightly combining the top cover plate, the connecting ring and the pole column assembly.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 is a schematic view showing an exploded structure of a secondary battery cover plate according to an exemplary embodiment of the present invention;
fig. 2 shows a cross-sectional view of a secondary battery cover plate according to an exemplary embodiment of the present invention;
fig. 3 shows a partial enlarged view of a secondary battery cover plate at a post according to an exemplary embodiment of the present invention;
fig. 4 is a schematic view showing a structure of a connection ring in a secondary battery cover plate according to an exemplary embodiment of the present invention.
Description of reference numerals:
1. top cap piece, 2, go-between, 21, main part, 22, extension, 23, through-hole, 3, mounting hole, 4, utmost point post, 5, injection molding, 6, sealing member, 7, explosion-proof valve, 8, lower plastic part.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
For solving the problem that prior art exists, the utility model provides a secondary battery apron, including top cap piece, a pair of utmost point post subassembly and a pair of go-between, be equipped with a pair of mounting hole on the top cap piece, every utmost point post subassembly is connected in a mounting hole through a go-between.
The utility model relates to a secondary battery apron increases the bulk strength of apron utmost point post structure through the inseparable combination between top cap piece, go-between and the utmost point post subassembly.
Preferably, the connecting ring comprises a main body and an extension part, the main body is an annular sheet body, the extension part is a cylindrical shape and is vertically connected to the main body, the main body is connected to the bottom side of the top cover plate through welding, and the extension part penetrates through the mounting hole to the position above the top cover plate. The main body and the extension are joined together by welding.
Preferably, the extension part is provided with a plurality of through holes along the circumferential direction.
Preferably, every utmost point post subassembly all includes utmost point post and injection molding, and utmost point post is located in the extension to connect in the mounting hole through the go-between, form the clearance between utmost point post and the go-between, go-between and the top cap piece, through to moulding plastics in clearance and the through-hole in order to form the injection molding, the injection molding fills the clearance and wraps up the extension. The injection molding is used for fixing the utmost point post, and during the manufacturing, the injection molding is filled in the clearance between utmost point post, go-between and mounting hole by top cap piece top to fill in the through-hole on the go-between, make between top cap piece, go-between and the utmost point post combine inseparabler, structural strength is better.
The periphery of the top cover sheet at the mounting hole can adopt a convex hull structure, so that the structural strength of the top cover sheet can be enhanced; the convex hull structure is not needed, so that the height of the pole can be effectively reduced, and the energy density of the secondary battery is improved.
Preferably, the pair of pole assemblies comprises a positive pole assembly and a negative pole assembly, the injection molding part of the negative pole assembly is made of insulating plastic, and the injection molding part of the positive pole assembly has a resistance value. The pole of the negative pole assembly is formed by connecting a first part and a second part together through brazing or friction welding, wherein the first part is positioned on the second part, the first part is made of aluminum alloy, and the second part is made of copper simple substance.
Preferably, a sealing member is arranged between the pole and the connecting ring.
Preferably, the outer periphery of the pole is provided with a snap ring, the axial cross section of the sealing element is L-shaped and comprises a horizontal part and a vertical part which are connected with each other, the horizontal part is arranged between the snap ring and the connecting ring, and the vertical part is arranged between the outer periphery of the pole and the inner periphery of the connecting ring. The sealing member is a sealing ring, and because the connecting ring and the pole are tightly combined through the injection molding part, when the pole compresses the sealing ring, the moment of the sealing ring to the connecting ring can be greatly reduced, and the sealing performance of the cover plate structure is ensured.
Preferably, still include explosion-proof valve, be equipped with explosion-proof valve through-hole on the top cover plate, explosion-proof valve is connected in explosion-proof valve through-hole. The explosion-proof valve comprises a rupture disk and a protective film, and the structure is not repeated any more because the explosion-proof valve is an existing product.
Preferably, still including lower plastic part, lower plastic part passes through rubberizing, hot melt or ultrasonic bonding laminating and connects in the bottom of top cap piece, and plastic part switches on in the lithium cell under the utmost point post passes.
The utility model relates to a during secondary battery apron preparation, earlier install utmost point post in respective mounting hole, weld the go-between on the top cap piece, utmost point post passes through behind the tool compression sealing member, and it forms the injection molding in order to be in the same place top cap piece, utmost point post and go-between are fixed to mould plastics.
The utility model also provides a lithium ion battery, including foretell secondary battery apron. The secondary battery cover plate is connected to the battery shell, and the pole component is conducted to the battery.
Example 1
As shown in fig. 1 to 4, the utility model provides a secondary battery cover plate, including top cover plate 1, a pair of utmost point post subassembly and a pair of go-between 2, be equipped with a pair of mounting hole 3 on the top cover plate 1, every utmost point post subassembly is connected in a mounting hole 3 through a go-between 2.
In this embodiment, the connection ring 2 includes a main body 21 and an extension 22, the main body 21 is an annular sheet, the extension 22 is a cylindrical shape and is vertically connected to the main body 21, the main body 21 is connected to the bottom side of the top cover plate 1 by welding, and the extension 22 penetrates through the mounting hole 3 to the upper side of the top cover plate 1. The main body 21 and the extension 22 are joined together by welding.
The extension portion 22 is provided with a plurality of through holes 23 in the circumferential direction.
Every utmost point post subassembly all includes utmost point post 4 and injection molding 5, and utmost point post 4 is located in extension 22 to connect in mounting hole 3 through go-between 2, between utmost point post 4 and go-between 2, form the clearance between go-between 2 and the top cap piece 1, through moulding plastics in order to form injection molding 5 to clearance and through-hole 23, the injection molding fills the clearance and wraps up extension 22. Injection molding 5 is used for fixed utmost point post 4, and during the manufacturing, injection molding 5 fills in the clearance between utmost point post 4, go-between 2 and mounting hole 3 by top cap piece 1 top to fill in through-hole 23 on go-between 2, make between top cap piece 1, go-between 2 and the utmost point post 4 combine inseparabler, structural strength is better.
The top cover plate 1 does not adopt a convex hull structure at the mounting hole 3, so that the height of the pole 4 can be effectively reduced, and the energy density of the secondary battery is improved.
The pair of pole assemblies comprises a positive pole assembly and a negative pole assembly, the injection molding part 5 of the negative pole assembly is made of insulating plastic, and the injection molding part 5 of the positive pole assembly has a resistance value. The polar column 4 of the negative pole assembly is formed by connecting a first part and a second part together through brazing or friction welding, wherein the first part is positioned on the second part, the first part is made of aluminum alloy, and the second part is made of copper simple substance.
A sealing element 6 is arranged between the pole 4 and the connecting ring 2.
The periphery of utmost point post 4 is equipped with the snap ring, and the axial cross-section of sealing member 6 is the L type, including interconnect's horizontal portion and perpendicular portion, and the horizontal portion is located between snap ring and go-between 2, and perpendicular portion is located between the periphery of utmost point post 4 and the interior week of go-between 2. The sealing member 6 is a sealing ring, and because the connecting ring 2 and the pole 4 are tightly combined through the injection molding part 5, when the pole 4 compresses the sealing ring, the moment of the sealing ring to the connecting ring 2 can be greatly reduced, and the sealing performance of the cover plate structure is ensured.
In this embodiment, still include explosion-proof valve 7, be equipped with explosion-proof valve 7 through-hole on the top cover plate 1, explosion-proof valve 7 is connected in explosion-proof valve 7 through-hole. The explosion-proof valve 7 includes a rupture disk and a protective film.
In this embodiment, still including plastic part 8 down, plastic part 8 is connected in the bottom of top cap piece 1 through the rubberizing laminating down, and plastic part 8 switches on in the lithium cell under utmost point post 4 passes.
The utility model relates to a during secondary battery apron preparation, earlier install utmost point post 4 in respective mounting hole 3, weld go-between 2 on top cap piece 1, utmost point post 4 is through tool compression sealing member 6 back, and it forms injection molding 5 in order to be in the same place top cap piece 1, utmost point post 4 and go-between 2 are fixed to mould plastics.
Example 2
The utility model provides a lithium ion battery, including the secondary battery apron of embodiment 1. The secondary battery cover plate is connected to the battery shell, and the pole component is conducted to the battery.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (9)
1. The secondary battery cover plate is characterized by comprising a top cover plate (1), a pair of pole assemblies and a pair of connecting rings (2), wherein the top cover plate (1) is provided with a pair of mounting holes (3), and each pole assembly is connected into one mounting hole (3) through one connecting ring (2);
the connecting ring (2) comprises a main body (21) and an extending part (22), the main body (21) is an annular sheet body, the extending part (22) is of a cylinder type and is vertically connected to the main body (21), the main body (21) is connected to the bottom side of the top cover plate (1), and the extending part (22) penetrates through the mounting hole (3) to the position above the top cover plate (1).
2. The secondary battery cap plate according to claim 1, wherein the extension portion (22) is provided with a plurality of through-holes (23) in a circumferential direction.
3. The secondary battery cover plate according to claim 2, wherein each of the pole assemblies comprises a pole (4) and an injection molded part (5), the pole (4) is disposed in the extension part (22) and connected in the mounting hole (3) through the connection ring (2), a gap is formed between the pole (4) and the connection ring (2) and between the connection ring (2) and the top cover plate (1), and the injection molded part (5) is formed by injection molding into the gap and the through hole (23), and the injection molded part (5) fills the gap and wraps the extension part (22).
4. The secondary battery cover plate according to claim 3, wherein the pair of pole assemblies comprises a positive electrode assembly and a negative electrode assembly, the injection molded part of the negative electrode assembly is made of insulating plastic, and the injection molded part of the positive electrode assembly has a resistance value.
5. The secondary battery cap plate according to claim 3, wherein a seal (6) is provided between the terminal post (4) and the connection ring (2).
6. The secondary battery cover plate according to claim 5, wherein a snap ring is provided on the outer circumference of the terminal post (4), and the seal member (6) has an L-shaped axial cross section, and includes a horizontal portion and a vertical portion connected to each other, the horizontal portion being provided between the snap ring and the connection ring (2), and the vertical portion being provided between the outer circumference of the terminal post (4) and the inner circumference of the connection ring (2).
7. The secondary battery cover plate according to claim 1, further comprising an explosion-proof valve (7), wherein an explosion-proof valve through hole is formed in the top cover plate (1), and the explosion-proof valve (7) is connected in the explosion-proof valve through hole.
8. The secondary battery cover plate according to claim 3, further comprising a lower plastic part (8), wherein the lower plastic part (8) is attached to the bottom of the top cover plate (1) by gluing, hot melting or ultrasonic welding, and the terminal post (4) penetrates through the lower plastic part (8).
9. A lithium ion battery comprising the secondary battery cover plate according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022747901.0U CN213184430U (en) | 2020-11-24 | 2020-11-24 | Secondary battery cover plate and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022747901.0U CN213184430U (en) | 2020-11-24 | 2020-11-24 | Secondary battery cover plate and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213184430U true CN213184430U (en) | 2021-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022747901.0U Active CN213184430U (en) | 2020-11-24 | 2020-11-24 | Secondary battery cover plate and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213184430U (en) |
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2020
- 2020-11-24 CN CN202022747901.0U patent/CN213184430U/en active Active
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