CN220474747U - Top cover assembly and power battery - Google Patents
Top cover assembly and power battery Download PDFInfo
- Publication number
- CN220474747U CN220474747U CN202322007862.4U CN202322007862U CN220474747U CN 220474747 U CN220474747 U CN 220474747U CN 202322007862 U CN202322007862 U CN 202322007862U CN 220474747 U CN220474747 U CN 220474747U
- Authority
- CN
- China
- Prior art keywords
- pole
- metal ring
- top cover
- welding
- mounting hole
- 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.)
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Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 66
- 239000002184 metal Substances 0.000 claims abstract description 66
- 238000003466 welding Methods 0.000 claims abstract description 58
- 238000007789 sealing Methods 0.000 claims description 24
- 239000012212 insulator Substances 0.000 claims description 6
- 238000004021 metal welding Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- Connection Of Batteries Or Terminals (AREA)
Abstract
In order to solve the problem of electric connection impedance increase caused by uneven welding surfaces of a metal ring and a pole in the prior art, the top cover assembly and the power battery comprise a top cover plate, a pole and a metal ring, wherein a first pole mounting hole is formed in the top cover plate, the pole penetrates through the first pole mounting hole, the metal ring is sleeved on the periphery of the part, exposed out of the first pole mounting hole, of the pole, a welding seam is formed at the contact position of the inner wall of the metal ring and the pole, and seals the joint of the pole and the metal ring; the height of the pole and the height of the welding seam do not exceed the surface of the metal ring, which faces away from the top cover piece. The top cap subassembly that this application provided the welding of metal ring inner wall and utmost point post contact position welding forms the welding seam, the welding seam does not bulge metal ring surface and the welding face is level and smooth, has improved the welding quality of metal ring and outside electric connection spare reduces welding position impedance.
Description
Technical Field
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a top cover assembly and a power battery.
Background
The main components of the power battery comprise a shell and a top cover component, wherein the top cover component is required to penetrate through a pole mounting hole on a top cover plate and fasten a pole by a metal ring in a specific assembly process, in the prior art, a metal ring is fastened by a welding mode to be connected with the pole, a welding surface is formed at a contact position of the top surface of the pole and the metal ring after welding, the welding surface is easy to protrude and directly expose on the outer surface of the metal ring to influence the flatness of the welding position of the pole and the metal ring, and the power battery is required to be mutually welded at the top surface position of the pole through a busbar when in use, at the moment, a welding seam of the top surface of the pole is protruded out of the top surface of the pole, so that the bus cannot be fully contacted with the top surface of the pole to influence the welding effect, and the problem of impedance increase of the connection position is caused.
Disclosure of Invention
The utility model aims to solve the technical problem that in the prior art, the welding seam formed by the welding contact surface of a metal ring and a pole is uneven, so that the electric connection impedance is increased.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the top cover assembly is characterized by comprising a top cover plate, a pole and a metal ring, wherein a first pole mounting hole is formed in the top cover plate, the pole penetrates through the first pole mounting hole, the metal ring is sleeved on the periphery of the part, exposed out of the first pole mounting hole, of the pole, a welding seam is formed at the contact position between the inner wall of the metal ring and the pole, and the welding seam seals the joint between the pole and the metal ring;
the height of the pole and the height of the welding seam do not exceed the surface of the metal ring, which faces away from the top cover piece.
Optionally, the assembly device further comprises a sealing ring, wherein the sealing ring is arranged between the top cover plate and the pole, and the sealing ring is used for sealing an assembly gap between the top cover plate and the pole.
Optionally, the sealing device further comprises an upper insulating part, wherein the upper insulating part is arranged between the metal ring and the top cover sheet, and the upper insulating part is abutted with one surface of the sealing ring, which faces the top cover sheet.
Optionally, the pole includes extension post section, body portion and bottom plate, body portion connect in extension post section with between the bottom plate, body portion is located in the first pole mounting hole, extension post section with the bottom plate is located respectively the both sides of first pole mounting hole.
Optionally, the external diameter of extension post section is less than the external diameter of body portion, in order to be in body portion with the position of extension post section handing-over is formed with first annular step face, the metal ring cover is located the periphery of extension post section, just the metal ring butt in on the first annular step face, the welding seam is formed in between the metal ring with the extension post section.
Optionally, an annular groove is provided on the inner edge of the surface of the metal ring facing away from the top cover sheet, and the bottom surface of the annular groove is flush with the top surface of the extension column section.
Optionally, the device further comprises a lower insulating part, wherein the lower insulating part is arranged on one surface of the top cover piece, which is away from the upper insulating part, and a second pole mounting hole is formed in the lower insulating part at a position corresponding to the first pole mounting hole.
In one aspect, the present application provides a power cell comprising the cap assembly.
In the method, a welding seam is formed by welding the contact position of the inner wall of the metal ring and the pole, the welding seam is used for sealing the joint between the pole and the metal ring, and the connection strength and the sealing performance between the metal ring and the pole are improved; in addition, the pole height and the height of the welding seam do not exceed the surface of the metal ring, which is away from the top cover sheet, and the surface of the metal ring, which is away from the top cover sheet, is used as the welding surface for external welding, so that a flat welding surface is formed, the welding quality of the metal ring and an external electric connecting piece is improved, and the impedance of a welding position is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a header assembly provided by the present utility model;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is an exploded view of the cap assembly provided by the present utility model.
Reference numerals in the drawings of the specification are as follows:
1. a pole; 11. a body portion; 12. a bottom plate; 13. extending the column section; 2. a metal ring; 21. an annular groove; 3. an upper insulating member; 4. a seal ring; 5. a top cover sheet; 6. a lower insulating member; 7. welding seams; 8. a first pole mounting hole; 9. and a second pole mounting hole.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the utility model provides a top cover assembly, which comprises a top cover plate 5, a pole 1 and a metal ring 2, wherein a first pole mounting hole 8 is formed in the top cover plate 5, the pole 1 penetrates through the first pole mounting hole 8, the metal ring 2 is sleeved on the periphery of a part of the pole 1 exposed out of the first pole mounting hole 8, a welding seam 7 is formed at the contact position between the inner wall of the metal ring 2 and the pole 1, and the welding seam 7 seals a joint between the pole 1 and the metal ring 2;
the height of the pole 1 and the height of the welding seam 7 do not exceed the surface of the metal ring 2 facing away from the top cover sheet 5.
Specifically, a welding line 7 is formed at the contact position between the inner wall of the metal ring 2 and the pole 1, and the welding line 7 is used for sealing the joint between the pole 1 and the metal ring 2, so that the connection strength and the sealing performance between the metal ring 2 and the pole 1 are improved; in addition, the height of the pole 1 and the total height of the pole 1 and the welding seam 7 are not more than the surface of the metal ring 2, which is away from the top cover sheet 5, so that a flat welding surface is formed, the welding quality of the metal ring 2 and an external electric connecting piece is improved, the impedance of a welding position is reduced, and the overall performance of the power battery is further improved.
In an embodiment, the sealing ring 4 is further included, the sealing ring 4 is disposed between the top cover piece 5 and the pole 1, and the sealing ring 4 is used for sealing an assembly gap between the top cover piece 5 and the pole 1.
Specifically, the sealing ring 4 seals the assembly gap between the top cover sheet 5 and the pole 1, so as to prevent leakage of the battery.
In an embodiment, the sealing device further comprises an upper insulating member 3, wherein the upper insulating member 3 is arranged between the metal ring 2 and the top cover sheet 5, and the upper insulating member 3 is abutted with one surface of the sealing ring 4, which faces the top cover sheet 5.
In an embodiment, the pole comprises an extension pole section 13, a body portion 11 and a bottom plate 12, the body portion 11 is connected between the extension pole section 13 and the bottom plate 12, the body portion 11 is located in the first pole mounting hole 8, and the extension pole section 13 and the bottom plate 12 are located at two sides of the first pole mounting hole 8 respectively.
In an embodiment, the outer diameter of the extension column section 13 is smaller than the outer diameter of the body portion 11, so that a first annular step surface is formed at a position where the body portion 11 meets the extension column section 13, the metal ring 2 is sleeved on the outer periphery of the extension column section 13, the metal ring 2 abuts against the first annular step surface, and the welding seam 7 is formed between the metal ring 2 and the extension column section 13.
The outer diameter of the extension column section 13 is smaller than the outer diameter of the body 11 to reduce the cross-sectional area of the pole 1, so that the welding seam moves inwards in the direction of the central axis of the pole 1, the cross-sectional area of the metal ring 2 is effectively enlarged, the metal ring 2 is conveniently used as a welding site of an external bus bar, the welding area is increased, and the contact resistance is reduced; in addition, after the sectional area of the metal ring 2 is enlarged, the external bus bar is welded on the metal ring 2, and the material consumption of the pole 1 is correspondingly reduced, so that the production cost of the product is favorably controlled.
The annular metal ring 2 is sleeved on the outer diameter of the body part 11 and is welded and connected, so that the overall strength of the top cover assembly can be improved.
In one embodiment, the inner edge of the surface of the metal ring 2 facing away from the top cover piece 5 is provided with an annular groove 21, and the bottom surface of the annular groove 21 is flush with the top surface of the extension column section 13.
Specifically, the bottom surface of the annular groove 21 is flush with the top surface of the extension column section 13, which is favorable for forming a flat welding surface during welding, improving the welding quality of the metal ring 2 and an external electric connector, and reducing the impedance of a welding position.
In one embodiment, the outer diameter of the body portion is smaller than the outer diameter of the base plate to form a second annular step surface at the location where the body portion meets the base plate, the second annular step surface being larger than the first annular step surface.
The second annular step surface is larger than the first annular step surface, so that the sealing ring 4 is convenient to install, in addition, the supporting function is achieved, and the integral mechanical property of the top cover assembly is improved.
In an embodiment, the second annular step portion abuts the sealing ring 4.
The second annular step part is abutted with the sealing ring 4, so that the sealing performance of the sealing ring 4 on the pole 1 is improved.
In an embodiment, the insulation cover further comprises a lower insulation piece 6, the lower insulation piece 6 is arranged on one surface of the top cover piece 5, which faces away from the upper insulation piece 3, and a second pole mounting hole 9 is arranged on the lower insulation piece 6 at a position corresponding to the first pole mounting hole 8.
The second pole mounting hole 9 provided on the lower insulator 6 includes a positive pole mounting hole and/or a negative pole mounting hole; the pole 1 is connected with the lower insulating member 6 and the top cover sheet 5 through the positive electrode mounting hole and/or the negative electrode mounting hole to form a top cover assembly.
Another embodiment of the present application provides a power cell including the top cap assembly.
The utility model provides an in the power battery the top cap subassembly through the welding metal ring 2 with utmost point post 1 contact gap, when increasing joint strength and sealing performance between metal ring 2 and the utmost point post 1, the welding formation welding seam 7 does not bulge metal ring 2 surface position is favorable to forming and levels the welding face, improves the welding quality of metal ring 2 and outside electric connection spare reduces welding position impedance, and then promotes power battery wholeness ability.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The top cover assembly is characterized by comprising a top cover plate, a pole and a metal ring, wherein a first pole mounting hole is formed in the top cover plate, the pole penetrates through the first pole mounting hole, the metal ring is sleeved on the periphery of the part, exposed out of the first pole mounting hole, of the pole, a welding seam is formed at the contact position between the inner wall of the metal ring and the pole, and the welding seam seals the joint between the pole and the metal ring;
the height of the pole and the height of the welding seam do not exceed the surface of the metal ring, which faces away from the top cover piece.
2. The top cap assembly of claim 1, further comprising a seal ring disposed between the top cap piece and the pole, the seal ring for sealing the top cap piece and the pole assembly gap.
3. The header assembly of claim 2, further comprising an upper insulator disposed between the metal ring and the header sheet, the upper insulator abutting a face of the seal ring facing the header sheet.
4. The top cap assembly of claim 2, wherein the pole includes an extension pole section, a body portion and a bottom plate, the body portion being connected between the extension pole section and the bottom plate, the body portion being located in the first pole mounting hole, the extension pole section and the bottom plate being located on opposite sides of the first pole mounting hole, respectively.
5. The header assembly of claim 4, wherein the outer diameter of the extension post is smaller than the outer diameter of the body portion to form a first annular step surface at the location where the body portion meets the extension post, the metal ring is sleeved on the outer periphery of the extension post, the metal ring abuts against the first annular step surface, and the weld is formed between the metal ring and the extension post.
6. The roof assembly of claim 4, wherein an inner edge of a surface of the metal ring facing away from the roof sheet is provided with an annular groove, a bottom surface of the annular groove being flush with a top surface of the extension pole section.
7. The cap assembly of claim 5, wherein the body portion has an outer diameter less than an outer diameter of the base plate to form a second annular step surface at a location where the body portion meets the base plate, the second annular step surface being larger than the first annular step surface.
8. The cap assembly of claim 7, wherein said second annular stepped portion abuts said seal ring.
9. A cap assembly according to claim 3, further comprising a lower insulator disposed on a side of the cap piece facing away from the upper insulator, wherein a second pole mounting hole is provided in the lower insulator at a location corresponding to the first pole mounting hole.
10. A power cell comprising the cap assembly of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322007862.4U CN220474747U (en) | 2023-07-27 | 2023-07-27 | Top cover assembly and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322007862.4U CN220474747U (en) | 2023-07-27 | 2023-07-27 | Top cover assembly and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220474747U true CN220474747U (en) | 2024-02-09 |
Family
ID=89804110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322007862.4U Active CN220474747U (en) | 2023-07-27 | 2023-07-27 | Top cover assembly and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220474747U (en) |
-
2023
- 2023-07-27 CN CN202322007862.4U patent/CN220474747U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |