CN214625197U - Battery cover and power battery - Google Patents
Battery cover and power battery Download PDFInfo
- Publication number
- CN214625197U CN214625197U CN202120180057.XU CN202120180057U CN214625197U CN 214625197 U CN214625197 U CN 214625197U CN 202120180057 U CN202120180057 U CN 202120180057U CN 214625197 U CN214625197 U CN 214625197U
- Authority
- CN
- China
- Prior art keywords
- cover plate
- top cover
- main body
- battery cover
- extension part
- 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.)
- Active
Links
- 238000003466 welding Methods 0.000 claims abstract description 37
- 238000001746 injection moulding Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000012943 hotmelt Substances 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- Sealing Battery Cases Or Jackets (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 flanging is arranged at the free end of 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 part is at least filled in 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 technical 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.
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, and the thrust resistance is lower.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery apron and power battery realizes improving the structural strength who laps utmost point post subassembly structure, increases the resistant thrust and the gas tightness of utmost point post subassembly 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 an annular circular sheet-shaped main body part and a tubular extension part arranged on one side of the main body part, 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 flanging is arranged at the free end of 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 part is at least filled in the first gap and the second gap.
Optionally, the flanging is turned towards the inner side of the welding ring, and the overlapping distance between the flanging and the electrode column in the direction parallel to the surface of the top cover plate is greater than or equal to 1 mm.
Optionally, the flange is folded towards the outside of the welding ring, and the extension part is trumpet-shaped.
Optionally, the electrode column comprises a base and a column on the base, and the column form a boss structure; the flanging is higher than the top of the base, and the extension part is coated by the injection molding piece.
Optionally, the seal ring is in a compressed state.
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 the adoption have the welding ring of extension, and the free end of extension has inside or outside turn-ups, and the sealing washer cover is in the inboard of welding ring to the injection molding is filled in the clearance between top cap piece and utmost point post, can guarantee the leakproofness of apron structure through utmost point post compression seal circle, and makes battery apron overall structure intensity better, and the whole resistant thrust of apron utmost point post structure and resistance to pressure are higher, reduce the gas leakage risk of utmost point post structure department.
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 cross-sectional view of a battery cover plate according to an embodiment of the present invention.
Fig. 2 shows an exploded view of a battery cover plate according to an embodiment of the present invention.
Fig. 3 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. 4 and 5 are a perspective view and a cross-sectional view illustrating an original structure of a weld ring in a battery cover plate according to an embodiment of the present invention, respectively.
Fig. 6 and 7 are a perspective view and a cross-sectional view of a bent weld ring in a battery cover plate according to an embodiment of the present invention.
Fig. 8 and 9 are a perspective view and a cross-sectional view of a welded ring in a battery cover plate according to 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 part, 201-main body part, 202-extension part.
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 shows a cross-sectional view of a battery cover plate according to an embodiment of the present invention, and fig. 2 shows an exploded view of a battery cover plate according to an embodiment of the present invention.
As shown in fig. 1 and 2, 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;
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 flanging is arranged at the free end of 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 filled at least in the first gap and the second gap.
Referring to fig. 3, in the present embodiment, the flange is folded toward the inner side of the welding ring 101, and the overlapping distance between the flange and the electrode column in the direction parallel to the surface of the top cover plate is preferably greater than or equal to 1 mm.
The seal ring 103 is in a compressed state. The main body 201 of the welding ring 101 is fixedly connected to the top cover sheet 1 by welding.
The injection molding piece 104 arranged in the positive electrode component 2 is formed by injection molding of a conductive material and has a certain resistance value, and the injection molding piece 104 arranged in the negative electrode component 3 is formed by injection molding of an insulating material, preferably insulating plastic.
The electrode columns 102 of the positive electrode and the negative electrode comprise bases and columns on the bases, the columns and the columns form a boss structure, the flanging of the extending portion 202 of the welding ring 101 is higher than the top of the bases, and the extending portion 202 is coated by the injection molding piece 104. The electrode column of the cathode is made of copper-aluminum composite materials, the upper half part is made of aluminum alloy, and the lower half part is made of copper simple substance.
Preferably, the overlapping distance between the electrode column 102 and the extension 202 in the direction perpendicular to the surface of the top cover sheet 1 is 1mm or more.
The top cover plate 1 is also provided with an explosion-proof valve 4 mounting hole and a liquid injection hole 6, the explosion-proof valve 4 is mounted in the explosion-proof valve 4 mounting hole, and the explosion-proof valve 4 comprises a rupture disk and a protective film.
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.
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. 3, the convex hull structure is preferably not used in this embodiment.
The specific manufacturing process of the battery cover plate in the embodiment is as follows:
referring to fig. 4 and 5, the weld ring 101 includes a main body portion 201 and an extension portion 202, and the original state of the extension portion 202 is a vertical state as shown in fig. 4 and 5.
Firstly, the main body part 201 of the welding ring 101 in an original state and the top cover plate 1 are welded together by laser, the electrode column 102 and the sealing ring 103 are placed in the inner cavity of the welding ring 101, then the extending part 202 of the welding ring 101 is bent into an inward-folded shape as shown in fig. 6 and 7 by a mould, finally the pole is placed in position by a positioning clamp and then injection-molded, and the pole, the welding ring 101 and the sealing ring 103 are tightly connected together by an injection-molded part 104.
In another embodiment, the flange is folded over towards the outside of the weld ring 101, the extension being generally flared. The specific manufacturing process comprises the following steps:
after welding the welding ring 101 in an original state and the top cover plate 1 by laser, bending the extending part 202 of the welding ring 101 outwards into a horn shape as shown in fig. 8 and 9 by a die, then compressing the pole into the sealing ring 103 by a jig for injection molding, and tightly connecting the pole, the welding ring 101 and the sealing ring 103 together by an injection molding piece 104.
The utility model discloses a battery cover plate structure, because the free end that adopts welding ring 101 extension 202 has inside or outside flange structure, there is 1 mm's overlap distance between welding ring 101 extension 202 and utmost point post at least, apron overall structure intensity is better, the thrust that the apron bore is bigger, sealing washer 103 cover is in the inboard of welding ring 101, guarantee the leakproofness of apron structure through utmost point post compression seal circle 103, the resistant thrust of improvement utmost point post structure, and because the apron does not have the convex closure structure, utmost point post height can effectively be reduced, thereby improve secondary battery's energy density.
The embodiment of the invention also provides a power battery which comprises the battery cover plate of the embodiment. The positive and negative pole post assemblies have better sealing performance and can obtain higher energy density.
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 flanging is arranged at the free end of 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 part is at least filled in the first gap and the second gap.
2. The battery cover plate according to claim 1, wherein the flange is folded toward the inner side of the welding ring, and the overlapping distance between the flange and the electrode column in the direction parallel to the surface of the top cover plate is greater than or equal to 1 mm.
3. The battery cover plate of claim 1, wherein the flange is folded over toward the outside of the weld ring, and the extension is flared.
4. The battery cover plate according to claim 1, wherein the electrode posts comprise a base and posts on the base, the posts forming a boss structure with the base;
the flanging is higher than the top of the base, and the extension part is coated by the injection molding piece.
5. The battery cover plate of claim 1, wherein the sealing ring is in a compressed state.
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 |
|---|---|---|---|
| CN202120180057.XU CN214625197U (en) | 2021-01-22 | 2021-01-22 | Battery cover and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120180057.XU CN214625197U (en) | 2021-01-22 | 2021-01-22 | Battery cover and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214625197U true CN214625197U (en) | 2021-11-05 |
Family
ID=78438373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120180057.XU Active CN214625197U (en) | 2021-01-22 | 2021-01-22 | Battery cover and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214625197U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114361689A (en) * | 2021-11-23 | 2022-04-15 | 宁波震裕汽车部件有限公司 | Top cover structure of power battery |
| 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 |
| CN115084738A (en) * | 2022-07-15 | 2022-09-20 | 深圳市长盈精密技术股份有限公司 | Power battery top cover |
| CN115320007A (en) * | 2022-10-13 | 2022-11-11 | 宁波震裕科技股份有限公司 | Injection molding pole post forming method and power battery top cover structure |
| GB2623391A (en) * | 2022-10-13 | 2024-04-17 | Ningbo Zhenyu Tech Co Ltd | Power battery top cover structure |
| SE2330178A1 (en) * | 2022-11-10 | 2024-05-11 | Ningbo Zhenyu Auto Parts Co Ltd | Battery top cover assembly |
| JP7576653B2 (en) | 2022-10-17 | 2024-10-31 | 寧波震裕科技股▲ふん▼有限公司 | Method for integrally pressing top cover plate and method for manufacturing top cover structure |
-
2021
- 2021-01-22 CN CN202120180057.XU patent/CN214625197U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114361689A (en) * | 2021-11-23 | 2022-04-15 | 宁波震裕汽车部件有限公司 | Top cover structure of power battery |
| 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 |
| CN115084738A (en) * | 2022-07-15 | 2022-09-20 | 深圳市长盈精密技术股份有限公司 | Power battery top cover |
| CN115320007A (en) * | 2022-10-13 | 2022-11-11 | 宁波震裕科技股份有限公司 | Injection molding pole post forming method and power battery top cover structure |
| CN115320007B (en) * | 2022-10-13 | 2023-02-10 | 宁波震裕科技股份有限公司 | Injection molding pole post forming method and power battery top cover structure |
| GB2623391A (en) * | 2022-10-13 | 2024-04-17 | Ningbo Zhenyu Tech Co Ltd | Power battery top cover structure |
| JP7576653B2 (en) | 2022-10-17 | 2024-10-31 | 寧波震裕科技股▲ふん▼有限公司 | Method for integrally pressing top cover plate and method for manufacturing top cover structure |
| SE2330178A1 (en) * | 2022-11-10 | 2024-05-11 | Ningbo Zhenyu Auto Parts Co Ltd | Battery top cover assembly |
| SE546724C2 (en) * | 2022-11-10 | 2025-02-11 | Ningbo Zhenyu Auto Parts Co Ltd | Battery top cover assembly |
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