CN216980822U - Welding structure of power battery top cover - Google Patents
Welding structure of power battery top cover Download PDFInfo
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- CN216980822U CN216980822U CN202221453081.7U CN202221453081U CN216980822U CN 216980822 U CN216980822 U CN 216980822U CN 202221453081 U CN202221453081 U CN 202221453081U CN 216980822 U CN216980822 U CN 216980822U
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- pole
- top cover
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- welding
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Abstract
The utility model discloses a welding structure of a power battery top cover, which comprises a top cover plate, a pole assembly, a sealing element and a welding element, wherein the sealing element is arranged between the pole assembly and a pole mounting position of the top cover plate; a weld acts on the pole positioning member to weld the pole assembly to the top cap sheet. The welding structure of the top cover of the power battery has the advantages of stable structure, easiness in manufacturing and lower cost.
Description
Technical Field
The utility model belongs to the technical field of power battery accessories of new energy automobiles, and particularly relates to a welding structure of a power battery top cover.
Background
The power battery is an important component of the new energy vehicle, and the existing new energy battery mostly adopts a lithium ion battery as the power battery. For a power lithium battery, besides the key components such as the battery core and the BMS, the structure of the battery shell is also an important factor for the safety of the power lithium battery. The pole is a component of the battery module, and besides being used for conducting electricity with the positive and negative pole edges of the battery core in the module, the pole also needs to have corresponding structural strength and sealing requirements so as to meet the application requirements of automobiles.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a welding structure of a top cover of a power battery, which has a stable structure, is easy to manufacture and has lower cost.
In order to achieve the purpose, the utility model adopts the scheme that:
the utility model provides a welded structure of power battery top cap, includes top cap piece, utmost point post subassembly and sealing member, be equipped with utmost point post installation position on the top cap piece, utmost point post installation position department is equipped with utmost point post hole, and utmost point post subassembly cooperates in utmost point post installation position department, and the sealing member sets up between utmost point post subassembly and utmost point post installation position. The welding structure further comprises a welding part, and the welding part is matched on the pole component and is connected with the top cover plate in a welding mode.
The pole assembly comprises a pole and a pole positioning piece, the pole comprises a pole part and a fixing part, and the pole positioning piece at least coats the lower surface and the side surface of the fixing part and is continuously or intermittently arranged around the pole; a weld acts on the pole positioning member to weld the pole assembly to the top cap sheet.
According to the welding structure of the power battery top cover, the pole positioning piece is made of an insulating material, and the pole positioning piece is arranged on the periphery of the pole through injection molding or assembled on the periphery of the pole.
According to the welding structure of foretell power battery top cap, be equipped with the sealing member constant head tank that is used for supplying the sealing member to set up on the lower surface of utmost point post portion to when utmost point post and top cap piece assemble, be connected to the sealing member in advance and do benefit to the assembly on the utmost point post.
According to the welding structure of the power battery top cover, the pole part comprises an upper pole part and a lower pole part, the upper pole part is arranged in a protruding mode relative to the fixing part, and the lower pole part is arranged in a protruding mode relative to the fixing part; be formed with the sealing member constant head tank that is used for supplying the sealing member to set up between utmost point post portion and the utmost point post setting element down to can be connected to the utmost point post with the sealing member in advance when utmost point post and top cap piece assemble in order to do benefit to the assembly.
According to the welding structure of the power battery top cover, the pole mounting position is provided with the first limiting part surrounding the pole hole, the outer side of the first limiting part is provided with the first positioning part which is arranged in a concave mode relative to the first limiting part, the first positioning part is used for setting the sealing part, and the outer side of the first positioning part is provided with the second positioning part used for setting the pole positioning part.
According to the welding structure of the power battery top cover, the outer side of the second positioning piece is further provided with a third positioning piece for the welding piece to be arranged, the outer end of the third positioning piece is provided with a second limiting piece, and the second limiting piece acts on the outer side wall of the welding piece to limit the welding piece.
According to the welding structure of the power battery top cover, the second positioning piece is lower than the third positioning piece so as to form a third limiting piece between the second positioning piece and the third positioning piece, and the third limiting piece acts on the lower side surface of the pole positioning piece so as to limit the pole positioning piece, so that the pole is positioned and arranged at the pole mounting position.
According to the welding structure of the power battery top cover, the welding groove is further formed in the top cover plate and located on the periphery of the pole mounting position, the welding groove is arranged on the top cover plate in a concave mode close to the third positioning piece, and is matched with the welding piece to form the complete welding groove, so that the welding piece and the top cover plate can be welded conveniently.
According to the welding structure of the power battery top cover, the pole component is respectively formed into a positive pole and a negative pole, and the pole mounting position comprises a positive pole hole position and a negative pole hole position; the positive pole is an integral pole; the negative pole post is a split type post and comprises a first post and a second post, and the fixing part of the negative pole post is formed by the first post and the second post together, so that the negative pole post is formed into an integral structure after being wrapped by the post positioning piece.
According to the welding structure of the power battery top cover, the pole positioning piece covers the upper surface, the lower surface and the side surfaces of the fixing part and is continuously or intermittently arranged around the pole.
According to the welding structure of the power battery top cover, the sizes of the positive pole hole site and the negative pole hole site are different, one is larger, the other is smaller, and the fool-proof effect is achieved during assembly.
According to the welding structure of the power battery top cover, the insulating plastic part is arranged below the top cover plate and is matched with the lower portion of the top cover plate through clamping, or is formed below the top cover plate through injection molding.
The welding structure of the top cover of the power battery has the following beneficial effects:
1. the manufacturing process is simplified, and besides other necessary steps, the welding structure mainly comprises two working procedures of material placement and welding of a welding part, so that the production process is simplified.
2. The pole positioning piece is preferably wrapped on the periphery of the pole through an injection molding process to form an integrated pole assembly so as to be beneficial to assembly.
3. In the pole assembly, the pole is wrapped by the pole positioning piece to realize insulation.
4. Be equipped with a plurality of from interior to the setting element or the locating part that sets gradually outward on the utmost point post installation position of top cap piece to can fix a position the cooperation position of sealing member, utmost point post subassembly and welding, can also provide the spacing power of lateral direction, make between utmost point post and the top cap piece by accurate, firmly be connected.
5. The welding part is matched with the pole component through a concave-convex structure, so that the pole and the top cover plate are stably connected; the pole column is pressed during the matched welding, so that the sealing between the pole column and the top cover plate is in a pressed state after the welding, and the sealing of the pole column opening is good.
6. Different sizes are also set for the positive and negative poles so as to achieve the fool-proof effect during assembly.
7. A welding groove is reserved on the top cover plate and the welding part, so that the joint of the top cover plate and the welding part is regular and firm after welding.
Drawings
FIG. 1 is a schematic structural view of a power cell top cover assembly according to an embodiment of the present invention;
FIG. 2 is a partially exploded schematic view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the positive electrode post in the embodiment of FIG. 1;
FIG. 4 is an enlarged partial schematic view of FIG. 3;
FIG. 5 is a schematic cross-sectional view of the negative electrode post in the embodiment of FIG. 1;
FIG. 6 is a schematic cross-sectional view of the top flap in the embodiment of FIG. 1;
FIG. 7 is an enlarged partial schematic view of FIG. 6;
FIG. 8 is a schematic cross-sectional view of the positive pole post assembly in the embodiment of FIG. 1;
fig. 9 is a schematic sectional structure view of the pole assembly of the negative electrode in the embodiment of fig. 1.
Wherein the reference numerals are: the anti-explosion valve 104 comprises a welding part 1, a pole assembly 2, a sealing part 3, an insulating plastic part 5, a top cover plate 6, a first positioning part 11, a second positioning part 12, a pole welding groove 13, a pole 21, a pole positioning part 22, a positioning convex part 23, a hole insulating part 51, a pole mounting position 61, a pole hole 62, a first limiting part 63, a first positioning part 64, a second positioning part 65, a third positioning part 66, a second limiting part 67, a welding groove 68, a third limiting part 69, a positive pole 101, a negative pole 102, a liquid injection port 103, an anti-explosion valve 104, a first pole 201, a second pole 202, a pole part 211, a fixing part 212, an upper pole part 213, a lower pole part 214, a sealing part positioning groove 215, a fourth positioning part 221, a lower side surface 222, a positive pole hole position 601, a negative pole hole position 602 and a third positioning part 231.
Detailed Description
In order that those skilled in the art will better understand the utility model and thus more clearly define the scope of the utility model as claimed, it is described in detail below with respect to certain specific embodiments thereof. It should be noted that the following description is only a few embodiments of the present invention, and the specific direct description of the related structures is only for the convenience of understanding the present invention, and the specific features do not, of course, directly limit the implementation scope of the present invention. Such alterations and modifications as are made obvious by those skilled in the art and guided by the teachings herein are intended to be within the scope of the utility model as claimed.
As shown in fig. 1, a power battery top cover assembly is adapted to be fitted to a battery case to form a power battery module. The top cover assembly comprises a top cover, wherein the top cover is provided with a positive electrode pole 101, a negative electrode pole 102, a liquid injection port 103 and an explosion-proof valve 104.
The positive electrode post 101 and the negative electrode post 102 are welded to the top cover through a post welding structure to form a welding structure of the top cover of the power battery.
As shown in fig. 2, the top cover assembly includes a top cover plate 6, the top cover plate 6 is provided with a post mounting position 61, and the post mounting position 61 is used for arranging a positive post 101 or a negative post 102; the pole mounting position 61 is also internally provided with a pole hole 62 which is communicated with the top cover plate 6, so that the pole can penetrate and then is electrically connected with the battery cell.
This utmost point post welded structure is including welding 1, utmost point post subassembly 2 and sealing member 3, and utmost point post subassembly 2 has two and forms respectively into anodal utmost point post 101 and negative pole post 102, and utmost point post subassembly 2 sets up in utmost point post installation position 61 department, and sealing member 3 sets up in order to play insulating and sealed effect between utmost point post subassembly 2 and utmost point post installation position 61. The weldment 1 is used to weld the pole assembly 2 to the top cover sheet 6, and more specifically to the pole mounting location 61.
As shown in fig. 3, an insulating plastic part 5 is further arranged below the top cover plate 6, and is in clamping fit below the top cover plate 6, or is formed below the top cover plate 6 in an injection molding mode. The plastic insulator 5 is formed as a hole insulator 51 that protrudes upward from the pole hole 62 to insulate the pole hole 62, so that the insulation between the top cover plate 6 and a tab (not shown) provided in the hole insulator 51 can be satisfied.
As shown in fig. 3, the pole assembly 2 includes a pole 21 and a pole positioning member 22, the pole 21 is made of conductive alloy, such as aluminum alloy, and the pole positioning member 22 is formed on the periphery of the pole 21 by injection molding. The pole positioning member 22 is made of an insulating material so that the pole 21 is not conducted with the top cover 6.
In this embodiment, the pole 21 is first machined or pre-formed into a desired shape and then placed in an injection mold along the periphery of which the pole positioning member 22 is injection molded, thereby obtaining the described pole assembly 2. Of course, it is also possible to manufacture the pole 21 and the pole positioning member 22 separately and then assemble them together.
As shown in fig. 8, the pole 21 includes a pole part 211 and a fixing part 212, and the pole positioning member 22 is disposed to cover the upper surface, the side surface and the lower surface of the fixing part 212 and is continuously disposed along the fixing part 212, thereby forming an effect of surrounding and connecting the outer edge of the pole 21. Of course, it is also possible to assemble the pole positioning member 22 to cover the upper surface, the side surface and the lower surface of the fixing portion 212 and to be disposed around the pole 21 at intervals.
As shown in fig. 8 and 9, a sealing member positioning groove 215 for disposing the sealing member 3 is further provided on the lower surface of the pole part 211, the pole part 211 includes an upper pole part 213 and a lower pole part 214, the upper pole part 213 is disposed to protrude upward from the fixing part 212, the lower pole part 214 is disposed to protrude downward from the fixing part 212, and the sealing member positioning groove 215 is disposed on the periphery of the lower pole part 214.
As shown in fig. 8 and 9, the lower surface of the pole part 211 is slightly convex to form the sealing member positioning groove 215 between the lower pole part 214 and the pole positioning member 22.
When assembling utmost point post subassembly 2 to utmost point post installation position 61, need set up sealing member 3 between the two, it is difficult to realize its effective location to directly place sealing member 3. As shown in fig. 3, the sealing member 3 can be easily assembled to the lower side of the pole assembly 2 after the sealing member positioning groove 215 is provided, so that the sealing member 3 is integrally formed with the pole assembly 2 and can be integrally assembled with the pole mounting position 61.
As shown in fig. 8, the positive electrode post is an integral structure, i.e., the upper post portion 213, the lower post portion 214 and the fixing portion 212 are an integral structure. The negative electrode post is a split structure, as shown in fig. 8, and is composed of a first post 201 and a second post 202, so that the first post and the second post can be made of different materials. Therefore, the pole assembly 2 at the positive pole is an integral pole, and the pole assembly 2 at the negative pole is a split pole.
In addition, in the present embodiment, the fixing portion 212 of the negative electrode post is formed by the first electrode post 201 and the second electrode post 202 together, so that after injection molding, the first electrode post 201 and the second electrode post 202 are wrapped and fixed by the post positioning member 22 to form the negative electrode post capable of being integrally assembled.
Of course, if the convenience of the post assembling process is not considered, the post positioning member 22 may only wrap the first post 201 or the second post 202, and the second post 202 or the first post 201 is sleeved in the post positioning member 22. For example, referring to fig. 9, the fixing portion 212 is completely formed by the second pole 202, the first pole 201 is placed above the second pole 202, and the side surface of the first pole 201 is wrapped by the pole positioning member 22.
As shown in fig. 5-7, a first limiting member 63 disposed around the pole hole 62 is disposed on the pole mounting position 61, a first positioning member 64 disposed in a recessed manner is disposed outside the first limiting member 63, a second positioning member 65 and a third positioning member 66 are sequentially disposed outside the first positioning member 64, and a second limiting member 67 is disposed outside the third positioning member 66.
The first limiting member 63 is used for surrounding to form the pole hole 62, the first positioning member 64 is used for contacting with the lower surface of the sealing member 3, the second positioning member 65 is used for contacting with the lower surface of the pole positioning member 22, the third positioning member 66 is used for contacting with the lower surface of the welding member 1, and the second limiting member 67 is used for acting on the outer side surface of the welding member 1 to limit the welding member 1 in the pole hole 62.
In the present embodiment, a positioning protrusion 23 is further formed on the outer side of the pole positioning member 22, the positioning protrusion 23 is disposed corresponding to the fixing portion 212, and a fourth positioning member 221 for cooperating with the third positioning member 66 is formed at the lower surface of the positioning protrusion 23. The positioning boss 23 further includes a third positioning part 231 disposed higher than the fourth positioning part 221.
As shown in fig. 4 and 8, the welding member 1 includes a first positioning portion 11 and a second positioning portion 12, the first positioning portion 11 and the second positioning portion 12 are arranged in a step shape, the first positioning portion 11 acts on the upper surface of the positioning convex portion 23 to fixedly press the positioning convex portion, and the second positioning portion 12 is fitted on the third positioning portion 66 and located outside the third positioning portion 231.
In the present embodiment, the second positioning element 65 is lower than the third positioning element 66, and the two positioning elements are arranged in parallel. Disposing the second positioning member 65 lower than the third positioning member 66 may form a third limiting member 69 therebetween, and the third limiting member 69 acts on the lower side surface 222 of the pole positioning member 22 to position the pole positioning member 22.
In the present embodiment, a welding groove 68 is further provided on the top cover plate 6 at the periphery of the pole mounting position 61, and the welding groove 68 is concavely provided on the top cover plate 6 next to the third positioning member 66, so that after the pole assembly 2 and the welding member 1 are fitted onto the pole mounting position 61, a complete pole welding groove 13 concavely provided relative to the upper surface of the top cover plate 6 is formed between the welding member 1 and the top cover plate 6.
As shown in fig. 8 and 9, the pole positioning member 22 covers the upper surface, the lower surface and the side surface of the fixing portion 212, and is continuously disposed around the pole 21. Of course, the spacing arrangement is also feasible only when considering the assembly positioning requirement.
As shown in fig. 2, the post assembly 2 is formed as a positive post 101 and a negative post 102 at the positive and negative electrodes, respectively, the post mounting position 61 includes a positive post hole 601 and a negative post hole 602, the positive post 101 is disposed corresponding to the positive post hole 601, and the negative post 102 is disposed corresponding to the negative post hole 602. In addition, the aperture of the positive electrode post hole 601 is larger than that of the negative electrode post hole 602 (the positive electrode post 101 is also larger than the negative electrode post 102 to be correspondingly matched), so that misassembly is prevented in the assembly process, and the fool-proof requirement in the process is met.
Claims (10)
1. A welding structure of a power battery top cover comprises a top cover plate (6), a pole assembly (2) and a sealing element (3), wherein the top cover plate (6) is provided with a pole mounting position (61), a pole hole (62) is formed in the pole mounting position (61), the pole assembly (2) is matched with the pole mounting position (61), and the sealing element (3) is arranged between the pole assembly (2) and the pole mounting position (61); the welding structure is characterized by further comprising a welding part (1), wherein the welding part (1) is matched on the pole component (2) and is connected with the top cover plate (6) in a welding mode;
the pole assembly (2) comprises a pole (21) and a pole positioning piece (22), the pole (21) comprises a pole part (211) and a fixing part (212), and the pole positioning piece (22) at least coats the lower surface and the side surface of the fixing part (212) and is continuously or intermittently arranged around the pole (21); the weldment (1) acts on the pole positioning element (22) to weld the pole assembly (2) to the top cover sheet (6).
2. The welding structure of the power battery top cover according to claim 1, wherein the pole positioning piece (22) is made of an insulating material, and the pole positioning piece (22) is formed on the periphery of the pole (21) through injection molding or assembled on the periphery of the pole (21).
3. The welding structure of the top cover of the power battery as claimed in claim 2, wherein the lower surface of the pole part (211) is provided with a sealing element positioning groove (215) for arranging the sealing element (3).
4. The welding structure of the top cover of the power battery as claimed in claim 2, wherein the pole part (211) comprises an upper pole part (213) and a lower pole part (214), the upper pole part (213) is upwardly protruded relative to the fixing part (212), and the lower pole part (214) is downwardly protruded relative to the fixing part (212); a sealing element positioning groove (215) for arranging the sealing element (3) is formed between the lower pole part (214) and the pole positioning element (22).
5. The welding structure of the top cover of the power battery according to any one of claims 1 to 4, wherein a first limiting member (63) is arranged on the pole mounting position (61) around the pole hole (62), a first positioning member (64) is arranged outside the first limiting member (63) in a recessed manner, the first positioning member (64) is used for arranging the sealing member (3), and a second positioning member (65) is arranged outside the first positioning member (64) and used for arranging the pole positioning member (22).
6. The welding structure of the top cover of the power battery as claimed in claim 5, wherein a third positioning member (66) for the welding member (1) is further disposed outside the second positioning member (65), a second limiting member (67) is disposed at an outer end of the third positioning member (66), and the second limiting member (67) acts on an outer side wall of the welding member (1) for limiting.
7. The welding structure of the top cover of the power battery according to claim 6, wherein the second positioning member (65) is arranged lower than the third positioning member (66) to form a third limiting member (69) therebetween, and the third limiting member (69) acts on the lower side surface (222) of the pole positioning member (22) to limit the pole positioning member (22).
8. The welding structure of the top cover of the power battery as claimed in claim 6 or 7, wherein a welding groove (68) is further formed in the top cover plate (6) and located at the periphery of the pole mounting position (61), and the welding groove (68) is concavely arranged on the top cover plate (6) next to the third positioning piece (66).
9. The welding structure of the power battery top cover according to claim 5, characterized in that the pole assembly (2) is formed into a positive pole (101) and a negative pole (102), and the pole mounting location (61) comprises a positive pole hole site (601) and a negative pole hole site (602); the positive pole column (101) is an integral pole column, the negative pole column (102) is a split pole column and comprises a first pole column (201) and a second pole column (202), and a fixing part (212) of the negative pole column (102) is formed by the first pole column (201) and the second pole column (202).
10. The welding structure of the top cover of the power battery according to claim 9, wherein the pole positioning piece (22) covers the upper surface, the lower surface and the side surface of the fixing part (212) and is continuously or intermittently arranged around the pole (21); anodal utmost point post hole site (601) and negative pole utmost point post hole site (602) the size difference, top cap piece (6) below still is equipped with insulating piece (5) of moulding, and it sets up in top cap piece (6) below through joint cooperation or injection moulding ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221453081.7U CN216980822U (en) | 2022-06-13 | 2022-06-13 | Welding structure of power battery top cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221453081.7U CN216980822U (en) | 2022-06-13 | 2022-06-13 | Welding structure of power battery top cover |
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| Publication Number | Publication Date |
|---|---|
| CN216980822U true CN216980822U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221453081.7U Active CN216980822U (en) | 2022-06-13 | 2022-06-13 | Welding structure of power battery top cover |
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| CN (1) | CN216980822U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2624265A (en) * | 2022-11-10 | 2024-05-15 | Ningbo Zhenyu Auto Parts Co Ltd | Battery top cover assembly |
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2022
- 2022-06-13 CN CN202221453081.7U patent/CN216980822U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2624265A (en) * | 2022-11-10 | 2024-05-15 | Ningbo Zhenyu Auto Parts Co Ltd | Battery top cover assembly |
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