CN214957087U - Battery cover plate and power battery - Google Patents
Battery cover plate and power battery Download PDFInfo
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- CN214957087U CN214957087U CN202120198962.8U CN202120198962U CN214957087U CN 214957087 U CN214957087 U CN 214957087U CN 202120198962 U CN202120198962 U CN 202120198962U CN 214957087 U CN214957087 U CN 214957087U
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- cover plate
- battery cover
- extension part
- main body
- wall
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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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a battery cover plate and power battery, include: the top cover plate is provided with two pole mounting holes, and a positive pole assembly and a negative pole assembly are respectively mounted in the two pole mounting holes; the positive electrode component and/or the negative electrode component respectively comprise: the welding ring comprises a main body part and an extension part which is arranged on one side of the main body part and is tubular, the main body part is fixedly connected with the bottom surface of the top cover plate, the extension part extends out of the top surface of the top cover plate, a plurality of openings penetrating through the side wall of the extension part are formed in the extension part, and a first gap is formed between the outer wall of the extension part and the inner wall of the pole mounting hole; the electrode column is arranged on the inner side of the welding ring, a sealing ring is arranged between the bottom of the electrode column and the main body part, and a second gap is formed between the outer wall of the electrode column and the inner wall of the extension part; and the injection molding piece is at least filled in the opening, the first gap and the second gap. The structural strength of the cover plate pole assembly is improved, and the thrust resistance and the air tightness of the pole assembly structure are improved.
Description
Technical Field
The utility model relates to a power battery field, more specifically relates to a battery cover plate and power 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.
Currently available power battery top covers generally include: 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; and most of utmost point post and injection molding adopt circular structure, and there is the not hard up risk of utmost point post etc. when the module is assembled to electric core.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery apron and power battery realizes having strengthened the bulk strength of apron utmost point post structure and guarantees the leakproofness of apron structure.
In order to achieve the above object, the utility model provides a battery cover plate, include: the top cover plate is provided with two pole mounting holes, and a positive pole assembly and a negative pole assembly are respectively mounted in the two pole mounting holes;
the positive electrode assembly and/or the negative electrode assembly respectively comprise:
the welding ring comprises a main body part and an extension part which is arranged on one side of the main body part and is tubular, the main body part is fixedly connected with the bottom surface of the top cover plate, the extension part extends out of the top surface of the top cover plate, a plurality of openings penetrating through the side wall of the extension part are formed in the extension part, and a first gap is formed between the outer wall of the extension part and the inner wall of the pole mounting hole;
the electrode column is arranged on the inner side of the welding ring, a sealing ring is arranged between the bottom of the electrode column and the main body part, and a second gap is formed between the outer wall of the electrode column and the inner wall of the extension part;
and the injection molding piece is at least filled in the opening, the first gap and the second gap.
Optionally, the center of the injection molding part is provided with a through hole corresponding to the pole mounting hole, and the profile of the injection molding part is polygonal, elliptical or racetrack.
Optionally, a step matched with the injection molding piece in shape is arranged around the pole mounting hole.
Optionally, the seal ring is in a compressed state.
Optionally, the electrode column is integrally of a boss structure.
Optionally, the upper half part of the electrode column in the negative electrode assembly is an aluminum alloy, and the lower half part is a copper simple substance.
Optionally, the top cover plate is further provided with an explosion-proof valve mounting hole, and an explosion-proof valve is mounted in the explosion-proof valve mounting hole.
Optionally, the roof cover plate further comprises a lower plastic structural part, and the lower plastic structural part is fixedly connected with the bottom surface of the roof cover plate in an adhesion or hot melting mode.
Optionally, the main body of the welding ring is fixedly connected with the top cover plate by welding.
Optionally, the injection molding piece arranged in the positive electrode assembly is made of a conductive material, and the injection molding piece arranged in the negative electrode assembly is made of an insulating material.
The utility model also provides a power battery, including above the battery apron.
The beneficial effects of the utility model reside in that:
through adopting to set up open structure at the welding ring extension, the injection molding is through filling the open position and the top cap piece of welding ring, the fit clearance between welding ring and the utmost point post for closely combine between top cap piece, welding ring and the utmost point post, strengthened apron utmost point post structure's bulk strength, because welding ring and utmost point post pass through the injection molding and closely combine, when utmost point post compressed the sealing washer, the sealing washer can reduce greatly to the moment of welding ring, had guaranteed the leakproofness of apron structure.
Furthermore, the positive and negative injection molding parts adopt polygonal, oval or racetrack structures, so that the anti-torsion effect of the pole can be enhanced under the condition that the electric core is overcurrent, and the safety performance of the electric core is enhanced.
The apparatus of the present invention has other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention with reference to the attached drawings, in which like reference numerals generally represent like parts.
Fig. 1 shows a top view of a battery cover plate according to an embodiment of the present invention.
Fig. 2 shows a cross-sectional view of a battery cover plate according to an embodiment of the present invention.
Fig. 3 shows an exploded view of a battery cover plate according to an embodiment of the present invention.
Fig. 4 shows an enlarged view of the position of the electrode posts in a battery cover plate according to an embodiment of the present invention.
Fig. 5 shows a block diagram of a weld ring in a battery cover plate according to an embodiment of the present invention.
Fig. 6 is a perspective view illustrating a top cover sheet in a battery cover plate according to an embodiment of the present invention.
Fig. 7 shows a top view of a battery cover plate according to another embodiment of the present invention.
Fig. 8 shows a top view of a battery cover plate according to yet another embodiment of the present invention.
Description of reference numerals:
1-top cover plate, 2-anode component, 3-cathode component, 4-explosion-proof valve, 5-lower plastic structure, 6-liquid injection hole, 101-welding ring, 102-electrode column, 103-sealing ring, 104-injection molding piece, 105-step, 201-main body part, 202-extension part and 203-opening.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be 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.
Fig. 1 to 3 respectively show a top view, a cross-sectional view and an exploded view of a battery cover plate according to an embodiment of the present invention.
As shown in fig. 1 to 3, a battery cover plate includes: the top cover plate 1 is provided with two pole mounting holes, and the two pole mounting holes are respectively provided with a positive pole component 2 and a negative pole component 3;
as shown in fig. 4 and 5, the positive electrode assembly 2 and/or the negative electrode assembly 3 respectively include:
the welding ring 101 comprises a main body part 201 and an extension part 202 which is arranged on one side of the main body part 201 and is tubular, the main body part 201 is fixedly connected with the bottom surface of the top cover plate 1, the extension part 202 extends out of the top surface of the top cover plate 1, a plurality of openings 203 which penetrate through the side wall of the extension part 202 are formed in the extension part 202, and a first gap is formed between the outer wall of the extension part 202 and the inner wall of the pole mounting hole;
the electrode column 102 is arranged on the inner side of the welding ring 101, a sealing ring 103 is arranged between the bottom of the electrode column 102 and the main body part 201, and a second gap is arranged between the outer wall of the electrode column 102 and the inner wall of the extension part 202;
and the injection molding piece 104 is at least filled in the opening 203, the first gap and the second gap.
Wherein, the center of injection molding 104 has the through-hole that corresponds with utmost point post mounting hole, and the shape of injection molding 104 profile can be polygon, ellipse or runway shape.
While the profile of the injection molded part 104 in this embodiment is square as shown in fig. 1, in other embodiments, the profile of the injection molded part 104 may be hexagonal or racetrack shaped as shown in fig. 7 and 8. Can also strengthen the antitorque effect of utmost point post under the condition of guaranteeing that electric core overflows, strengthened the security performance of electric core.
As shown in fig. 6, the pole mounting hole is provided with a step 105 around it that is form-fit to the injection molded part 104.
In this embodiment, the seal ring 103 is in a compressed state. The sealing ring 103 is sleeved on the inner side of the welding ring 101, and the sealing performance of the cover plate structure is ensured through the pole compression sealing ring 103.
In this embodiment, the electrode column 102 is a boss structure as a whole. The negative electrode post 102 in the negative electrode assembly 3 is made of copper-aluminum composite material, the upper half part is aluminum alloy, and the lower half part is copper simple substance.
In this embodiment, the top cover plate 1 is further provided with an explosion-proof valve mounting hole and a liquid injection hole 6, and an explosion-proof valve 4 is mounted in the explosion-proof valve mounting hole.
In this embodiment, the top cover plate further comprises a lower plastic structure 5, and the lower plastic structure 5 is fixedly connected with the bottom surface of the top cover plate 1 in an adhesion or hot melting mode.
In this embodiment, the main body 201 of the welding ring 101 is fixedly connected to the top cover sheet 1 by welding.
In this embodiment, the injection molding part 104 disposed in the positive electrode assembly 2 is made of a conductive material and has a certain resistance, and the injection molding part 104 disposed in the negative electrode assembly 3 is made of an insulating material, preferably an insulating plastic.
It should be noted that the convex hull structure can be adopted around the pole mounting hole of the top cover plate 1, or the convex hull structure can not be adopted, the structural strength of the top cover plate 1 can be enhanced by adopting the convex hull structure, but the pole height can be increased due to the existence of the convex hull structure, the utilization rate of the internal space of the battery is not favorably improved, and the energy density of the battery is not favorably improved. Therefore, as shown in fig. 4, the convex hull structure is preferably not used in this embodiment.
The preparation method of the cover plate assembly of the embodiment comprises the following steps:
the positive and negative electrode posts are arranged in respective post mounting holes, the welding ring 101 is welded on the top cover plate 1, the electrode posts 102 pass through the jig compression sealing ring 103, and then the top cover plate 1, the electrode posts and the welding ring 101 are connected together through the injection molding piece 104.
The utility model discloses a battery cover plate structure makes between top cap piece 1, welding ring 101 and the utmost point post closely combine, has strengthened the bulk strength of apron utmost point post structure, because welding ring 101 and utmost point post pass through injection molding 104 closely combine, when utmost point post compresses sealing washer 103, the moment of sealing washer 103 to welding ring 101 can reduce greatly, has guaranteed the leakproofness of apron structure.
The embodiment of the utility model provides a still provide a power battery, including the battery apron of above embodiment. The positive and negative pole post assemblies have better sealing performance and torsion resistance, and higher capacity and energy density can be obtained.
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 (10)
1. A battery cover plate, comprising: the top cover plate is provided with two pole mounting holes, and a positive pole assembly and a negative pole assembly are respectively mounted in the two pole mounting holes;
the positive electrode assembly and/or the negative electrode assembly respectively comprise:
the welding ring comprises a main body part and an extension part which is arranged on one side of the main body part and is tubular, the main body part is fixedly connected with the bottom surface of the top cover plate, the extension part extends out of the top surface of the top cover plate, a plurality of openings penetrating through the side wall of the extension part are formed in the extension part, and a first gap is formed between the outer wall of the extension part and the inner wall of the pole mounting hole;
the electrode column is arranged on the inner side of the welding ring, a sealing ring is arranged between the bottom of the electrode column and the main body part, and a second gap is formed between the outer wall of the electrode column and the inner wall of the extension part;
and the injection molding piece is at least filled in the opening, the first gap and the second gap.
2. The battery cover plate according to claim 1, wherein the injection-molded part has a through-hole in the center thereof corresponding to the post mounting hole, and the injection-molded part has a profile in the shape of a polygon, an ellipse, or a racetrack.
3. The battery cover plate according to claim 2, wherein the pole mounting hole is surrounded by a step that is in shape fit with the injection molded part.
4. The battery cover plate of claim 1, wherein the sealing ring is in a compressed state.
5. The battery cover plate according to claim 1, wherein the electrode posts are integrally of a boss structure;
the upper half part of the electrode column in the negative electrode assembly is aluminum alloy, and the lower half part of the electrode column is a copper simple substance.
6. The battery cover plate according to claim 1, wherein the top cover plate is further provided with an explosion-proof valve mounting hole in which an explosion-proof valve is mounted.
7. The battery cover plate according to claim 1, further comprising a lower plastic structural member, wherein the lower plastic structural member is fixedly connected with the bottom surface of the top cover plate in an adhesive or hot-melt manner.
8. The battery cover plate according to claim 1, wherein the main body portion of the welding ring is fixedly connected to the top cover sheet by welding.
9. The battery cover plate according to claim 1, wherein the injection molded part disposed in the positive electrode assembly is made of a conductive material, and the injection molded part disposed in the negative electrode assembly is made of an insulating material.
10. A power battery comprising the battery cover plate of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120198962.8U CN214957087U (en) | 2021-01-25 | 2021-01-25 | Battery cover plate and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120198962.8U CN214957087U (en) | 2021-01-25 | 2021-01-25 | Battery cover plate and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214957087U true CN214957087U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120198962.8U Active CN214957087U (en) | 2021-01-25 | 2021-01-25 | Battery cover plate and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214957087U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114447413A (en) * | 2022-01-28 | 2022-05-06 | 天津市捷威动力工业有限公司 | Battery cover plate and battery |
| CN114865179A (en) * | 2022-05-30 | 2022-08-05 | 天津市捷威动力工业有限公司 | Integrated pole, top cover assembly, battery and battery module |
| GB2623391A (en) * | 2022-10-13 | 2024-04-17 | Ningbo Zhenyu Tech Co Ltd | Power battery top cover structure |
-
2021
- 2021-01-25 CN CN202120198962.8U patent/CN214957087U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114447413A (en) * | 2022-01-28 | 2022-05-06 | 天津市捷威动力工业有限公司 | Battery cover plate and battery |
| CN114447413B (en) * | 2022-01-28 | 2023-09-26 | 天津市捷威动力工业有限公司 | Battery cover plate and battery |
| CN114865179A (en) * | 2022-05-30 | 2022-08-05 | 天津市捷威动力工业有限公司 | Integrated pole, top cover assembly, battery and battery module |
| GB2623391A (en) * | 2022-10-13 | 2024-04-17 | Ningbo Zhenyu Tech Co Ltd | Power battery top cover structure |
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