CN216818476U - Battery top cap subassembly and power battery - Google Patents
Battery top cap subassembly and power battery Download PDFInfo
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- CN216818476U CN216818476U CN202220448045.5U CN202220448045U CN216818476U CN 216818476 U CN216818476 U CN 216818476U CN 202220448045 U CN202220448045 U CN 202220448045U CN 216818476 U CN216818476 U CN 216818476U
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Abstract
The utility model provides a battery top cover assembly and a power battery, which comprise: the two ends of the top cover plate are respectively provided with a through mounting hole; the two pole columns are respectively used for being matched with the mounting holes and comprise bases and columns, the bases are arranged on the lower surface of the top cover plate, the columns are fixedly arranged on the upper surface of the bases and penetrate out of the mounting holes of the top cover plate, and annular walls are further arranged on the columns; the sealing element is arranged between the mounting hole and the pole and used for sealing the pole and the top cover plate; the insulating piece is of an annular structure, is sleeved on the outer periphery of the column body and is contacted with the upper surface of the top cover plate; when the annular wall is pressed and extends outwards horizontally, the insulating part is extruded, so that the pole column and the top cover plate are fixed. The battery top cover assembly is simple in structure, and the energy consumption cost is lower due to the adoption of a stamping mode in the assembly process; the adapter plate is eliminated, and the cost of the battery is further reduced.
Description
Technical Field
The utility model relates to the technical field of power batteries, in particular to a battery top cover assembly and a power battery.
Background
Nowadays, with the coming of the information-oriented high-tech age, the energy application form is changing, and the demand of renewable, pollution-free, small-sized and discrete mobile high-performance power sources is rapidly increasing. The green and high-efficiency power battery is vigorously developed in all countries. The lithium ion battery as a novel power battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like.
At present, the square aluminum-shell battery is dominant, and the top cover structure of the battery used in the market at present is complex and has a plurality of manufacturing procedures. Meanwhile, the positive and negative poles of the battery top cover and the top cover are fixed by laser welding and integrated injection molding. The above method has the following problems: the assembly process is complex and time-consuming, the cost is high, and the production efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a battery top cover assembly and a power battery, which are simple in manufacturing process and low in cost.
The technical scheme of the utility model is realized as follows:
in one aspect, the present invention provides a battery top cap assembly comprising:
the two ends of the top cover plate in the length direction are respectively provided with a through mounting hole;
the two pole columns are respectively used for being matched with the mounting holes and comprise bases and columns, the bases are arranged on the lower surface of the top cover plate, the columns are fixedly arranged on the upper surface of the bases and penetrate out of the mounting holes of the top cover plate, and annular walls are further arranged on the columns;
the sealing element is arranged between the mounting hole and the pole and used for sealing the pole and the top cover plate;
the insulating piece is of an annular structure, is sleeved on the outer periphery of the column body and is contacted with the upper surface of the top cover plate;
when the annular wall is pressed and extends outwards horizontally, the insulating part is extruded, so that the pole and the top cover plate are fixed.
On the basis of the technical scheme, preferably, the sealing member includes first sealing portion, and first sealing portion is cylindric structure, and its cover is established at the outer periphery of post body, and the outer wall of first sealing portion and the inner wall laminating of mounting hole, the outside extension of first sealing portion is formed with the second sealing portion, and the laminating is mutually held to the downside of second sealing portion upper surface and top cap piece, and the lower surface of second sealing portion is laminated mutually with the surface of base.
Further, preferably, the first sealing portion passes through the mounting hole, and a top of the first sealing portion is flush with an upper surface of the top cover plate.
On the basis of the above technical scheme, preferably, the upper surface of the top cover plate is provided with at least one first concave part, and the lower surface of the insulating member is provided with a first convex part matched with the first concave part.
Further, preferably, a plurality of second protruding portions are arranged on the upper surface of the insulating part close to the column body, the second protruding portions are arranged around the axial lead of the insulating part at equal intervals or at unequal intervals, a plurality of second recessed portions matched with the second protruding portions are arranged on the outer periphery of the annular wall, and the second recessed portions are arranged around the axial lead of the insulating part at equal intervals or at unequal intervals.
Preferably, the lower surface of the top cover plate is also fixedly provided with a lower plastic part.
Preferably, the top cover plate is also provided with a liquid injection hole and an explosion-proof valve hole.
Preferably, the top cover sheet is further provided with a top patch, and the top patch is provided with a through hole for the pole and the explosion-proof valve hole to pass through.
On the other hand, the utility model discloses a power battery, which comprises the battery top cover assembly; the battery comprises a battery shell and a battery core arranged in the battery shell, wherein a first insulating film is wrapped on the outer side of the battery core, and a second insulating film is wrapped on the outer side of the battery shell.
Compared with the prior art, the utility model has the following beneficial effects:
(1) according to the battery top cover assembly disclosed by the utility model, when the pole is installed with the top cover plate, only the sealing element and the insulating element are needed, the whole assembly structure is simple, the sealing element is installed on the pole and matched with the installation hole of the top cover plate, the insulating element is sleeved on the pole, the annular wall on the top surface of the pole is punched and flattened in a punching manner, and the insulating element is extruded, so that the pole and the top cover plate are fixed. Compared with the traditional top cover structure, the top cover structure is simple, and meanwhile, in the assembling process, compared with the traditional laser welding, the energy consumption cost of a stamping mode is lower, and the equipment investment cost is lower; meanwhile, after the pole and the top cover are assembled, the pole can be directly connected with a lug on the battery cell through the base at the bottom end of the pole, so that a switching piece is omitted, and the cost of the battery is further reduced;
(2) the first protruding part on the surface of the insulating part is matched with the first recessed part on the surface of the top cover plate, so that the insulating part can be prevented from rotating relative to the top cover plate, and the pole can be prevented from rotating relative to the mounting hole on the basis that the insulating part is pressed by the annular wall;
(3) set up a plurality of second bellyings through the insulating part surface, the annular wall lateral wall sets up the second depressed part, and when annular wall pressurized exhibition back, utilize the cooperation of second depressed part and second bellyings, can realize utmost point post and insulating part and keep fixed, under the fixed prerequisite of insulating part and top cap piece, and then realize utmost point post and top cap piece reciprocal anchorage, it is rotatory for the mounting hole to have avoided utmost point post completely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of a battery top cap assembly according to the present disclosure;
fig. 2 is a schematic perspective view of a pole disclosed in the present invention;
FIG. 3 is a schematic plan view of a battery top cap assembly according to the present disclosure;
FIG. 4 is an enlarged view of a portion A of FIG. 3;
FIG. 5 is an exploded view of the power cell of the present disclosure;
the attached drawings are as follows:
1. a top cover sheet; 2. a pole column; 3. a seal member; 4. an insulating member; 11. mounting holes; 21. a base; 22. a cylinder; 23. an annular wall; 31. a first seal portion; 32. a second seal portion; 12. a first recess; 41. a first boss portion; 42. a second boss portion; 231. a second recess; 5. a lower plastic part; 13. a liquid injection hole; 14. an explosion-proof valve hole; 6. top mounting; 7. a battery case; 8. an electric core; 9. a first insulating film; 10. a second insulating film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, with reference to fig. 2 and 3, an embodiment of the present invention discloses a battery top cap assembly, which includes a top cap sheet 1, a terminal post 2, a sealing member 3, and an insulating member 4.
Wherein, the top cap piece 1 is used for cooperating with battery case 7, as the shutoff piece of encapsulating electric core 8 in battery case 7, plays installation utmost point post 2 simultaneously to toward battery case 7 in for the effect of electric core 8 injection electrolyte. For the structure that adapts to square aluminum shell battery, top cap piece 1 is rectangular shape, and the material is the aluminium material, also can be other metal material. The through mounting holes 11 are respectively formed in the two ends of the top cover plate 1 in the length direction, and the mounting holes 11 are used for assembling the pole posts 2 with the top cover plate 1.
Two poles 2 are arranged, namely a positive pole 2 and a negative pole 2, and are respectively matched with the mounting hole 11. One end of the pole column 2 is used for being connected with a pole ear of a battery cell 8 in the battery shell 7, and the other end of the pole column is used for being connected with external electric equipment. More specifically, the part of the positive pole 2 located at the bottom of the top cover plate 1 is connected with a positive pole tab of the battery cell 8, and the part of the positive pole 2 located at the top of the top cover plate 1 is connected with the positive pole of the electric equipment; the part of the negative pole column 2, which is positioned at the bottom of the top cover plate 1, is connected with a negative pole tab of the battery cell 8, and the part of the positive pole column 2, which is positioned at the top of the top cover plate 1, is connected with a negative pole of the electric equipment.
The positive electrode tab 2 and the negative electrode tab 2 in this embodiment have the same structure, and the positive electrode tab 2 and the negative electrode tab 2 are hereinafter represented by the tab 2 in this embodiment. The pole column 2 comprises a base 21 and a column body 22, wherein the base 21 is disc-shaped, the material is copper material, the column body 22 is aluminum material, the base 21 and the column body 22 are connected in a welding mode, and other modes can be adopted for connection. The base 21 is arranged on the lower surface of the top cover plate 1, the column body 22 is fixedly arranged on the upper surface of the base 21 and penetrates out of the mounting hole 11 of the top cover plate 1, the column body 22 is in clearance fit with the mounting hole 11, the column body 22 is further provided with an annular wall 23, the annular wall 23 is also made of aluminum, the annular wall 23 can be directly formed on the top surface of the column body 22 through machining, the thickness of the annular wall 23 is 1mm-3mm, and the height of the annular wall 23 is 2mm-5 mm.
Sealing member 3 sets up between mounting hole 11 and utmost point post 2 for make sealed between utmost point post 2 and the top cap piece 1, sealing member 3 is the rubber material, at sealed in-process, can make and keep electrical isolation between utmost point post 2 and the top cap.
The insulating part 4 is made of hard plastic materials and is in an annular structure, and the insulating part is sleeved on the outer periphery of the column body 22 and is in contact with the upper surface of the top cover plate 1; when the annular wall 23 is pressed and horizontally extended outwards, the insulating part 4 is pressed to fix the pole 2 with the top cover plate 1. In order to facilitate the extension of the annular wall 23 under pressure, a plurality of notches may be formed along the circumference of the top surface of the annular wall 23. After the terminal post 2 and the top cover plate 1 are assembled and fixed, the whole top cover assembly is assembled with the battery shell 7, the base 21 can be directly abutted against the electrode lug of the battery cell 8 in the battery shell 7, the switching piece is omitted, and the cost is saved.
The disclosed battery top cap subassembly of this embodiment, utmost point post 2 only need sealing member 3 and insulating part 4 when installing with top cap piece 1, and whole assembly structure is simple, through installing sealing member 3 back on utmost point post 2, with the mounting hole 11 cooperation back of top cap piece 1, overlaps on utmost point post 2 and establishes insulating part 4, and it is flat to flatten to the annular wall 23 punching press of 2 top surfaces of utmost point post through the punching press mode, extrudes insulating part 4 to realize utmost point post 2 and fix with top cap piece 1. Compared with the traditional top cover structure, the top cover structure is simple, and meanwhile, in the assembling process, compared with the traditional laser welding, the energy consumption cost of a stamping mode is lower, and the equipment investment cost is lower; meanwhile, after the pole 2 and the top cover are assembled, the pole 2 can be directly connected with the pole lug on the battery cell 8 through the base 21 at the bottom end of the pole 2, a switching piece is omitted, and the cost of the battery is further reduced
In some preferred embodiments, the sealing member 3 includes a first sealing portion 31, the first sealing portion 31 is a cylindrical structure, and is disposed around the cylinder 22, an outer wall of the first sealing portion 31 is attached to an inner wall of the mounting hole 11, the first sealing portion 31 is in interference fit with the inner wall of the mounting hole 11, a fit clearance is 0mm to 0.5mm, the first sealing portion 31 extends outward to form a second sealing portion 32, an upper surface of the second sealing portion 32 is attached to a lower side of the top cover plate 1, and a lower surface of the second sealing portion 32 is attached to a surface of the base 21. With this arrangement, the base 21 and the column 22 can be completely sealed from the mounting hole 11 and electrically isolated from each other by the first sealing portion 31 and the second sealing portion 32.
Preferably, the first sealing portion 31 passes through the mounting hole 11, and the top of the first sealing portion 31 is flush with the upper surface of the top cover sheet 1. With this arrangement, the first sealing portion 31 is prevented from being higher than the top surface of the top cover plate 1, and then, the insulation member 4 is prevented from being mounted.
After the cylinder 22 is matched with the mounting hole 11, the cylinder 22 will rotate around the axial lead direction of the mounting hole 11, and thus the pole 2 and the pole ear of the battery cell 8 are in poor contact. For this reason, it is necessary to avoid rotation of the pole 2 in the mounting hole 11. Referring to fig. 4, the scheme adopted by the embodiment is as follows: the upper surface of the top cover plate 1 is provided with at least one first recess 12, and the lower surface of the insulating member 4 is provided with a first protrusion 41 which is fitted with the first recess 12. Therefore, the insulating part 4 is arranged on the column body 22 in a sleeved mode and slides downwards, the first protruding portion 41 and the second protruding portion 42 are matched with each other, the insulating part 4 can be prevented from rotating relative to the top cover plate 1, and the pole 2 can be prevented from rotating relative to the mounting hole 11 on the basis that the annular wall 23 compresses the insulating part 4.
Although the insulating part 4 and the top cover plate 1 are matched with each other through the first protruding portion 41 and the second protruding portion 42, only the insulating part 4 and the top cover plate 1 are kept relatively stationary, and the annular wall 23 is pressed and pressed tightly after being pressed and flattened, friction force is formed by extruding the flattened surface of the annular wall 23 and the upper surface of the insulating part 4, so that the pole 2 is guaranteed to be stationary with the top cover plate 1 by means of the insulating part 4, but the annular wall 23 and the insulating part 4 are only in surface-to-surface contact, and the risk of rotation can still occur, so that the pole 2 rotates in the mounting hole 11.
Therefore, the scheme adopted by the embodiment is as follows: a plurality of second protruding portions 42 are arranged on the upper surface of the insulating piece 4 close to the column body 22, the second protruding portions 42 are arranged around the axial lead of the insulating piece 4 at equal intervals or at unequal intervals, a plurality of second concave portions 231 matched with the second protruding portions 42 are arranged on the outer periphery of the annular wall 23, and the second concave portions 231 are arranged around the axial lead of the insulating piece 4 at equal intervals or at unequal intervals. From this setting, after annular wall 23 pressurized exhibition flat, utilize the cooperation of second depressed part 231 and second bellying 42, can realize that utmost point post 2 keeps fixed with insulating part 4, under the fixed prerequisite of insulating part 4 and top cap piece 1, realize utmost point post 2 and top cap piece 1 and keep fixed, and then avoided utmost point post 2 to rotate for mounting hole 11 completely.
It should be noted that, after the insulating member 4 is sleeved on the cylinder 22, it is not guaranteed that the positions of the second protruding portion 42 and the second recessed portion 231 just correspond, because the embodiment makes the second protruding portion 42 and the second recessed portion 231 set at equal intervals or at non-equal intervals, therefore, after the annular wall 23 is pressed and flattened, at least a part of the second protruding portion 42 can be matched with the second recessed portion 231, so that the terminal post 2 and the insulating member 4 can be kept fixed, and on the premise that the insulating member 4 and the top cover plate 1 are fixed, the terminal post 2 and the top cover plate 1 can be kept fixed, and the terminal post 2 is completely prevented from rotating relative to the mounting hole 11.
In the above embodiments, the first and second protrusions have a semicircular or triangular shape. Preferably semicircular, which facilitates the matching.
Preferably, the lower surface of the top cover plate 1 is also fixedly provided with a lower molding part 5, and the contact between the battery cell 8 and the top cover plate 1 can be avoided through the lower molding part 5, so that the short circuit is prevented.
Preferably, the top cover plate 1 is further provided with a liquid injection hole 13 and an explosion-proof valve hole 14. The liquid injection hole 13 is used for injecting electrolyte into the battery cell 8; the explosion-proof valve hole 14 is used for installing an explosion-proof valve, and the structural arrangement is conventional.
Preferably, the top cover plate 1 is further provided with a top patch 6, and the top patch is provided with a through hole for the pole 2 and the explosion-proof valve hole 14 to pass through. The top sticking sheet is directly stuck to the upper surface of the top cover plate 1 and is used for insulating.
The embodiment also discloses a power battery, which is shown in the attached figure 5 and comprises the battery top cover assembly; the battery comprises a battery shell 7 and a battery core 8 arranged in the battery shell 7, wherein a first insulating film 9 is wrapped on the outer side of the battery core 8, and a second insulating film 10 is wrapped on the outer side of the battery shell 7.
The assembly process of the power battery disclosed by the embodiment is as follows:
firstly, assembling a battery top cover assembly, installing a sealing element 3 on a pole 2, matching with a mounting hole 11 of a top cover plate 1, sleeving an insulating piece 4 on the pole 2, enabling the bottom surface of the insulating piece 4 to be attached to the upper surface of the top cover plate 1, enabling a first concave part 12 to be matched with a first convex part 41, stamping and flattening an annular wall 23 on the top surface of the pole 2 in a stamping mode, extruding the insulating piece 4, enabling a second concave part 231 to be matched with a second convex part 42, keeping the pole 2 relatively static in the mounting hole 11, pasting a top pasting sheet 6 on the surface of the top cover plate 1, insulating the top cover plate 1, after the assembly of the battery top cover assembly is completed, wrapping a first insulating film 9 on the periphery of a battery core 8, then placing the battery core 8 in a battery shell 7, assembling the battery top cover assembly on the battery shell 7, connecting the pole 2 with a pole lug of the battery core 8, wrapping a second insulating film 10 on the outer side of the battery shell 7, thereby completing the assembly of the whole power battery.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A battery top cap assembly, comprising:
the top cover plate (1), wherein both ends of the top cover plate (1) in the length direction are respectively provided with a through mounting hole (11);
the two pole posts (2) are respectively used for being matched with the mounting holes (11), each pole post (2) comprises a base (21) and a column body (22), the bases (21) are arranged on the lower surface of the top cover plate (1), the column bodies (22) are fixedly arranged on the upper surface of the bases (21) and penetrate out of the mounting holes (11) of the top cover plate (1), and annular walls (23) are further arranged on the column bodies (22);
the sealing element (3) is arranged between the mounting hole (11) and the pole (2) and used for sealing the pole (2) and the top cover plate (1);
the insulating piece (4) is of an annular structure, is sleeved on the outer periphery of the column body (22) and is in contact with the upper surface of the top cover plate (1);
when the annular wall (23) is pressed to extend outwards and horizontally, the insulating part (4) is extruded, so that the pole (2) and the top cover plate (1) are fixed.
2. The battery top cap assembly of claim 1, wherein: sealing member (3) are including first sealing (31), and first sealing (31) are cylindric structure, and its cover is established at cylinder (22) periphery, and the outer wall of first sealing (31) is laminated with the inner wall of mounting hole (11), and first sealing (31) outwards extend and are formed with second sealing (32), and second sealing (32) upper surface is laminated with the downside of top cap piece (1) mutually, and the lower surface of second sealing (32) is laminated with the surface of base (21) mutually.
3. The battery top cap assembly of claim 2, wherein: the first sealing part (31) penetrates through the mounting hole (11), and the top of the first sealing part (31) is flush with the upper surface of the top cover plate (1).
4. The battery top cap assembly of claim 1, wherein: the upper surface of the top cover plate (1) is provided with at least one first concave part (12), and the lower surface of the insulating part (4) is provided with a first convex part (41) matched with the first concave part (12).
5. The battery top cap assembly of claim 4, wherein: the upper surface of the insulating part (4) is provided with a plurality of second protruding parts (42) close to the column body (22), the second protruding parts (42) are arranged around the axial lead of the insulating part (4) at equal intervals or at unequal intervals, the outer periphery of the annular wall (23) is provided with a plurality of second concave parts (231) matched with the second protruding parts (42), and the second concave parts (231) are arranged around the axial lead of the insulating part (4) at equal intervals or at unequal intervals.
6. The battery top cap assembly of claim 1, wherein: the lower surface of the top cover plate (1) is also fixedly provided with a lower plastic part (5).
7. The battery top cap assembly of claim 1, wherein: and the top cover plate (1) is also provided with a liquid injection hole (13) and an explosion-proof valve hole (14).
8. The battery top cap assembly of claim 7, wherein: the top cover plate (1) is also provided with a top patch (6), and the top patch is provided with a through hole for the pole (2) and the explosion-proof valve hole (14) to pass through.
9. A power cell comprising the cell cap assembly of any one of claims 1 to 8; the battery comprises a battery shell (7) and a battery core (8) arranged in the battery shell (7), wherein a first insulating film (9) is wrapped on the outer side of the battery core (8), and a second insulating film (10) is wrapped on the outer side of the battery shell (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220448045.5U CN216818476U (en) | 2022-03-02 | 2022-03-02 | Battery top cap subassembly and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220448045.5U CN216818476U (en) | 2022-03-02 | 2022-03-02 | Battery top cap subassembly and power battery |
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| Publication Number | Publication Date |
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| CN216818476U true CN216818476U (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220448045.5U Active CN216818476U (en) | 2022-03-02 | 2022-03-02 | Battery top cap subassembly and power battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498332A (en) * | 2022-10-10 | 2022-12-20 | 中天储能科技有限公司 | Cover plate assembly and energy storage device |
| CN116544571A (en) * | 2023-07-05 | 2023-08-04 | 深圳海辰储能控制技术有限公司 | Top cap subassembly, energy memory and consumer |
-
2022
- 2022-03-02 CN CN202220448045.5U patent/CN216818476U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498332A (en) * | 2022-10-10 | 2022-12-20 | 中天储能科技有限公司 | Cover plate assembly and energy storage device |
| CN115498332B (en) * | 2022-10-10 | 2024-03-26 | 中天储能科技有限公司 | Cover plate assembly and energy storage device |
| CN116544571A (en) * | 2023-07-05 | 2023-08-04 | 深圳海辰储能控制技术有限公司 | Top cap subassembly, energy memory and consumer |
| CN116544571B (en) * | 2023-07-05 | 2024-04-02 | 深圳海辰储能控制技术有限公司 | Top cap subassembly, energy memory and consumer |
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