Battery top cover and battery

Abstract

The utility model relates to a battery top cover and a battery. The battery top cover comprises a main body, a pole component, a sealing ring and a pole bottom plate, the main body comprises a top cover sheet and a plastic sheet arranged on the inner side of the top cover sheet, and the main body is provided with a pole hole penetrating through the top cover sheet and the plastic sheet. The pole assembly comprises a pole, a pole lantern ring and a plastic part, the pole lantern ring sleeves the pole, a gap is formed between the pole lantern ring and the pole, the plastic part fills the gap and connects the pole and the pole lantern ring into a whole, the pole penetrates through the pole hole, and the pole lantern ring and the plastic part are both arranged on the outer side of the top cover piece. And the sealing ring is arranged between the top cover plate and the pole sleeve ring and surrounds the pole hole. The pole bottom plate is arranged on the inner side of the plastic sheet and connected to the pole, and the pole bottom plate and the pole lantern ring clamp the top cover sheet, the plastic sheet and the sealing ring, so that the sinking phenomenon of the pole assembly can be avoided. The injection molding and rubber coating section of the pole assembly is completed before the final assembly of the battery top cover, so that automatic production is facilitated in the final assembly process of the battery top cover, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of energy storage batteries, and in particular to a battery top cover and a battery. Background Art

[0002] In the prior art, the positive and negative electrode assembly of the battery top cover is usually connected to the top cover sheet by injection molding to complete the assembly of the battery top cover. The injection molding process usually requires manual intervention, resulting in low production efficiency of the battery top cover assembly process.

[0003] In addition, during the production of batteries, the pole needs to be welded to the positive or negative connecting piece. The high temperature generated by welding will cause the plastic to soften, and the pole assembly is prone to sinking. A certain proportion of pole sinking will also occur during the subsequent high-temperature baking process.

[0004] In view of this, there is a need to improve the battery top cover structure. Utility Model Content

[0005] The purpose of the utility model is to provide a battery top cover and a battery to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions.

[0007] The utility model provides a battery top cover and a battery, which comprises: a main body, comprising a top cover sheet and a plastic sheet arranged inside the top cover sheet, the main body is provided with a pole hole penetrating the top cover sheet and the plastic sheet;

[0008] A pole assembly, comprising a pole, a pole collar and a plastic part, wherein the pole collar is sleeved on the pole and has a gap with the pole, the plastic part fills the gap and connects the pole and the pole collar into a whole, the pole is passed through the pole hole, and the pole collar and the plastic part are both arranged on the outside of the top cover sheet;

[0009] A sealing ring, disposed between the top cover sheet and the pole collar, and surrounding the pole hole;

[0010] The pole bottom plate is arranged on the inner side of the plastic sheet and connected to the pole. The pole bottom plate and the pole sleeve clamp the top cover sheet, the plastic sheet and the sealing ring.

[0011] In some embodiments of the present application, the pole collar is provided with a convex portion;

[0012] The convex portion protrudes toward a side away from the sealing ring, so that the convex portion forms a filling groove on a side close to the sealing ring;

[0013] The plastic part fills the filling groove.

[0014] In some embodiments of the present application, a first anti-rotation structure is provided between the pole and the pole collar for preventing the pole from rotating relative to the pole collar.

[0015] In some embodiments of the present application, the first anti-rotation structure includes a limiting rib provided on the pole and a limiting groove provided on the pole collar;

[0016] The limiting rib is arranged in the limiting groove.

[0017] In some embodiments of the present application, the pole includes a first cylinder and a second cylinder coaxially connected, and the diameter of the first cylinder is greater than the diameter of the second cylinder;

[0018] The first column is arranged on the outer side of the top cover sheet, and the second column is passed through the pole hole;

[0019] The limiting ribs are arranged on the peripheral side of the second column, and a plurality of the limiting ribs are arranged around the second column at intervals in the circumferential direction;

[0020] The limiting grooves on the pole collar are provided with a plurality of circumferentially spaced apart positions;

[0021] The limiting ribs are arranged in the limiting grooves one by one;

[0022] The pole bottom plate is connected to an end of the second column away from the first column.

[0023] In some embodiments of the present application, the inner diameter of the pole collar is less than or equal to the inner diameter of the sealing ring;

[0024] The outer diameter of the pole collar is greater than or equal to the outer diameter of the sealing ring.

[0025] In some embodiments of the present application, a first step groove is provided on the outer side surface of the top cover sheet;

[0026] The sealing ring is arranged in the first step groove.

[0027] In some embodiments of the present application, a second step groove surrounding the pole hole is provided on the inner side surface of the plastic sheet;

[0028] The pole bottom plate is arranged in the second step groove;

[0029] The pole bottom plate is provided with a bulge;

[0030] The bulge protrudes toward a side close to the pole and extends into the pole hole;

[0031] The bulge is connected to the pole.

[0032] In some embodiments of the present application, a second anti-rotation structure is provided between the outer side surface of the top cover sheet and the plastic member to prevent the plastic member from rotating relative to the top cover sheet;

[0033] The second anti-rotation structure includes a positioning ring and a positioning column arranged on the outer side of the top cover sheet;

[0034] The positioning ring surrounds the pole hole;

[0035] The positioning column is arranged between the positioning ring and the pole hole;

[0036] The second anti-rotation structure also includes an annular groove and a cylindrical groove provided on the plastic part;

[0037] The annular groove surrounds the pole collar, and the cylindrical groove is arranged between the annular groove and the pole collar;

[0038] The positioning ring is arranged in the annular groove, and the positioning column is arranged in the cylindrical groove.

[0039] The utility model also provides a battery, which comprises the battery top cover described in any one of the above embodiments.

[0040] It can be seen from the above technical solutions that the embodiments of the utility model have at least the following advantages and positive effects:

[0041] In the battery top cover and battery of the embodiment of the utility model, the pole and the pole collar are connected into an integral pole assembly by injection molding and encapsulation before the battery top cover is assembled. The plastic part is formed during the injection molding and encapsulation process. The plastic part fills the gap between the pole and the pole collar, which can not only connect the pole and the pole collar but also form insulation protection between the pole and the pole collar.

[0042] Since the injection molding and encapsulation process of the pole assembly has been completed before the battery top cover is assembled, the process of assembling the battery top cover by the main body, pole assembly, sealing ring and pole bottom plate can be automated to improve production efficiency.

[0043] The pole bottom plate can be welded with the positive connecting piece or the negative connecting piece to achieve electrical connection. During the welding process, the pole bottom plate and the pole collar are used to clamp the top cover sheet, the plastic sheet and the sealing ring to form a rigid support, which can prevent the pole assembly from sinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0045] Figure 1 is a schematic structural diagram of a battery top cover according to an exemplary embodiment.

[0046] Figure 2 yes Figure 1 Schematic diagram of the decomposition structure.

[0047] Figure 3 yes Figure 1 sectional view of .

[0048] Figure 4 yes Figure 3 A cross-sectional view of the top cover sheet and the plastic sheet in FIG.

[0049] Figure 5 yes Figure 2 Schematic diagram of the exploded structure of the pole assembly.

[0050] Figure 6 yes Figure 2 A schematic diagram of the structure of the pole assembly at another angle.

[0051] Figure 7 yes Figure 6 Schematic diagram of the structure of the pole and pole ring.

[0052] Figure 8 yes Figure 7 sectional view of .

[0053] Fig. 9 yes Figure 7 A cross-sectional view from another angle.

[0054] The reference numerals are as follows: 1. main body; 11. top cover sheet; 111. first step groove; 112. positioning ring; 113. positioning column; 12. plastic sheet; 121. second step groove; 13. pole hole; 2. pole assembly; 21. pole; 211. limiting rib; 212. first column; 213. second column; 22. pole collar; 221. convex portion; 222. filling groove; 223. limiting groove; 23. plastic part; 231. annular groove; 232. cylindrical groove; 3. sealing ring; 4. pole bottom plate; 41. bulging portion. DETAILED DESCRIPTION

[0055] Although the present invention can be easily embodied as embodiments of different forms, only some of the specific embodiments are shown in the drawings and described in detail in this specification. It should be understood that this description should be regarded as an exemplary description of the principles of the present invention and is not intended to limit the present invention to that described herein.

[0056] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0057] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various elements of the utility model are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0058] See also Figures 1 to 9 The utility model provides a battery top cover, which includes a main body 1, a pole assembly 2, a sealing ring 3 and a pole bottom plate 4.

[0059] The main body 1 includes a top cover sheet 11 and a plastic sheet 12 disposed inside the top cover sheet 11 . The main body 1 is provided with a pole hole 13 penetrating the top cover sheet 11 and the plastic sheet 12 .

[0060] The pole assembly 2 includes a pole 21, a pole collar 22 and a plastic part 23. The pole collar 22 is sleeved on the pole 21 and there is a gap between the pole 21 and the plastic part 23. The plastic part 23 fills the gap and connects the pole 21 and the pole collar 22 into a whole. The pole 21 is inserted into the pole hole 13. The pole collar 22 and the plastic part 23 are both arranged on the outside of the top cover sheet 11.

[0061] The sealing ring 3 is arranged between the top cover sheet 11 and the pole collar 22 and surrounds the pole hole 13 .

[0062] The pole bottom plate 4 is arranged on the inner side of the plastic sheet 12 and connected to the pole 21 . The pole bottom plate 4 and the pole collar 22 clamp the top cover sheet 11 , the plastic sheet 12 and the sealing ring 3 .

[0063] The pole 21 and the pole collar 22 are connected into an integral pole assembly 2 by an injection molding process before the battery top cover is assembled. The plastic part 23 is formed during the injection molding process. The plastic part 23 fills the gap between the pole 21 and the pole collar 22, which can not only connect the pole 21 and the pole collar 22 but also form insulation protection between the pole 21 and the pole collar 22.

[0064] Since the injection molding and encapsulation process of the pole assembly 2 has been completed before the battery top cover is assembled, the process of assembling the battery top cover by the main body 1, the pole assembly 2, the sealing ring 3 and the pole bottom plate 4 can be automated to improve production efficiency.

[0065] The pole bottom plate 4 can be welded with the positive connecting plate or the negative connecting plate to achieve electrical connection. During the welding process, the pole bottom plate 4 and the pole collar 22 are used to clamp the top cover sheet 11, the plastic sheet 12 and the sealing ring 3 to form a rigid support, which can prevent the pole assembly 2 from sinking.

[0066] The inner side of the main body 1 and the outer side of the main body 1 are the two opposite sides of the main body 1. The inner side of the main body 1 is the side of the main body 1 facing the plastic sheet 12, and the outer side of the main body 1 is the side of the main body 1 facing away from the plastic sheet 12. The inner side of the plastic sheet 12 and the outer side of the plastic sheet 12 are the two opposite sides of the plastic sheet 12. The inner side of the plastic sheet 12 is the side of the plastic sheet 12 facing away from the main body 1, and the outer side of the plastic sheet 12 is the side of the plastic sheet 12 facing the main body 1. In this embodiment, the top cover sheet 11 is a plain aluminum sheet.

[0067] See also Figure 5 and Figure 7 The pole collar 22 increases the stability of the compressed sealing ring 3. A convex portion 221 is provided on the pole collar 22. The convex portion 221 protrudes toward the side away from the sealing ring 3, so that the convex portion 221 forms a filling groove 222 on the side close to the sealing ring 3. The plastic part 23 fills the filling groove 222. The covering area of ​​the plastic part 23 on the pole collar 22 is increased, thereby improving the overall connection strength of the pole assembly 2.

[0068] See also Figure 5 and Figure 6 , and combined with Figure 2 A first anti-rotation structure is provided between the pole 21 and the pole collar 22 to prevent the pole 21 from rotating relative to the pole collar 22. The first anti-rotation structure can lock the relative rotational freedom between the pole 21 and the pole collar 22 to prevent the pole 21 from rotating and shifting.

[0069] The first anti-rotation structure includes a limiting rib 211 provided on the pole 21 and a limiting groove 223 provided on the pole collar 22. The limiting rib 211 is provided in the limiting groove 223. The limiting rib 211 and the limiting groove 223 cooperate to form an anti-rotation structure for preventing the pole 21 from rotating and shifting.

[0070] Main references Figure 8 and Fig. 9 It should be noted that there is also a gap between the limiting rib 211 and the limiting groove 223, and the pole 21 and the pole collar 22 do not contact each other to ensure the insulation effect. The plastic part 23 can fill the gap between the limiting rib 211 and the limiting groove 223, connecting the pole 21 and the pole collar 22 into a whole. In this embodiment, the limiting rib 211 and the limiting groove 223 are matched with each other and leave a design gap of 0.5mm.

[0071] See also Figure 5 , and combined with Figures 7 to 9 The pole 21 includes a first column 212 and a second column 213 connected coaxially, and the diameter of the first column 212 is greater than the diameter of the second column 213. The first column 212 is arranged on the outer side of the top cover sheet 11, and the second column 213 is inserted into the pole hole 13. The limiting rib 211 is arranged on the peripheral side of the second column 213, and a plurality of limiting ribs 211 are arranged around the second column 213 at circumferential intervals. A plurality of limiting grooves 223 are arranged on the pole collar 22 at circumferential intervals. The limiting ribs 211 are arranged in the limiting grooves 223 one by one. The pole bottom plate 4 is connected to one end of the second column 213 away from the first column 212.

[0072] The first column 212 has a larger diameter, which is convenient for connecting to an external circuit for charging and discharging the battery. The second column 213 has a smaller diameter, which is convenient for being inserted into the pole hole 13 and reducing the manufacturing cost of the pole 21. The combination of the plurality of limiting ribs 211 and the plurality of limiting grooves 223 can more reliably prevent the pole 21 from rotating and shifting, and limit the rotational freedom of the pole 21.

[0073] Main references Figure 3 , the inner diameter of the pole collar 22 is less than or equal to the inner diameter of the sealing ring 3, and the outer diameter of the pole collar 22 is greater than or equal to the outer diameter of the sealing ring 3, ensuring that the pole collar 22 can completely cover the sealing ring 3 and press the sealing ring 3 to improve the sealing effect. In this embodiment, the compression amount of the sealing ring 3 is 30% to 40%. When the pole assembly 2 and the pole base plate 4 are solidified and connected, a special limiting fixture can be used to ensure that the compression amount of the sealing ring 3 is within the set deformation range, and the full inspection plan can be used to ensure the sealing of the product.

[0074] See also Figure 2 and Figure 3 A first step groove 111 is provided on the outer side of the top cover sheet 11, and the sealing ring 3 is arranged in the first step groove 111. The first step groove 111 positions the placement of the sealing ring 3 to ensure that the sealing ring 3 can stably seal the pole hole 13.

[0075] See also Figure 3 and Figure 4, a second step groove 121 surrounding the pole hole 13 is provided on the inner side of the plastic sheet 12, and the pole bottom plate 4 is arranged in the second step groove 121. By using the second step groove 121 to accommodate the pole bottom plate 4, the occupation of the internal space of the battery by the pole bottom plate 4 can be reduced, which is conducive to improving the energy density of the battery. The pole bottom plate 4 can be completely accommodated in the second step groove 121, that is, the inner side of the pole bottom plate 4 is located in the second step groove 121 or is flush with the inner side of the second step groove 121. The inner side of the pole bottom plate 4 can also slightly protrude from the inner side of the plastic sheet 12 to facilitate the connection of the positive electrode connecting plate or the negative electrode connecting plate.

[0076] A bulge 41 is provided on the pole bottom plate 4, the bulge 41 protrudes toward the side close to the pole 21, the bulge 41 extends into the pole hole 13, and the bulge 41 is connected to the pole 21. By providing the bulge 41 to connect with the pole 21, the design height of the pole 21 can be reduced, the material used for the pole 21 can be reduced, and the manufacturing cost can be saved. In this embodiment, the bulge 41 is connected to the end of the second column 213 away from the first column 212. The bulge 41 and the second column 213 can be connected by penetration welding.

[0077] See also Figure 2 and Figure 6 A second anti-rotation structure is provided between the outer side of the top cover sheet 11 and the plastic part 23 to prevent the plastic part 23 from rotating relative to the top cover sheet 11. The second anti-rotation structure can lock the relative rotational freedom between the top cover sheet 11 and the plastic part 23 to prevent the pole assembly 2 from rotating and shifting.

[0078] The second anti-rotation structure includes a positioning ring 112 and a positioning column 113 provided on the outer surface of the top cover sheet 11, the positioning ring 112 surrounds the pole hole 13, and the positioning column 113 is provided between the positioning ring 112 and the pole hole 13. The second anti-rotation structure also includes an annular groove 231 and a cylindrical groove 232 provided on the plastic part 23. The annular groove 231 surrounds the pole collar 22, and the cylindrical groove 232 is provided between the annular groove 231 and the pole collar 22. The positioning ring 112 is provided in the annular groove 231, and the positioning column 113 is provided in the cylindrical groove 232. The positioning ring 112 cooperates with the annular groove 231 and the positioning column 113 cooperates with the cylindrical groove 232 to form an anti-rotation structure that prevents the pole assembly 2 from rotating and shifting.

[0079] In this embodiment, the positioning ring 112 and the annular groove 231 are rectangular. There are four positioning columns 113 and four cylindrical grooves 232, which are respectively arranged at the four corners of the rectangle.

[0080] The utility model also provides a battery, which comprises the battery top cover provided by any one of the above embodiments.

[0081] The beneficial effects of the battery of the present invention may be referred to the above-mentioned embodiment of the battery top cover.

[0082] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A battery top cover, characterized in that: include: A main body, comprising a top cover sheet and a plastic sheet arranged inside the top cover sheet, wherein the main body is provided with a pole hole penetrating the top cover sheet and the plastic sheet; A pole assembly, comprising a pole, a pole collar and a plastic part, wherein the pole collar is sleeved on the pole and has a gap with the pole, the plastic part fills the gap and connects the pole and the pole collar into a whole, the pole is passed through the pole hole, and the pole collar and the plastic part are both arranged on the outside of the top cover sheet; A sealing ring, disposed between the top cover sheet and the pole collar, and surrounding the pole hole; The pole bottom plate is arranged on the inner side of the plastic sheet and connected to the pole. The pole bottom plate and the pole sleeve clamp the top cover sheet, the plastic sheet and the sealing ring.

2. The battery top cover according to claim 1, characterized in that: The pole collar is provided with a convex portion; The convex portion protrudes toward a side away from the sealing ring, so that the convex portion forms a filling groove on a side close to the sealing ring; The plastic part fills the filling groove.

3. The battery top cover according to claim 1, characterized in that: A first anti-rotation structure is provided between the pole and the pole collar to prevent the pole from rotating relative to the pole collar.

4. The battery top cover according to claim 3, characterized in that: The first anti-rotation structure includes a limiting rib provided on the pole and a limiting groove provided on the pole collar; The limiting rib is arranged in the limiting groove.

5. The battery top cover according to claim 4, characterized in that: The pole comprises a first cylinder and a second cylinder coaxially connected, and the diameter of the first cylinder is greater than the diameter of the second cylinder; The first column is arranged on the outer side of the top cover sheet, and the second column is passed through the pole hole; The limiting ribs are arranged on the peripheral side of the second column, and a plurality of the limiting ribs are arranged around the second column at intervals in the circumferential direction; The limiting grooves on the pole collar are provided with a plurality of circumferentially spaced apart positions; The limiting ribs are arranged in the limiting grooves one by one; The pole bottom plate is connected to an end of the second column away from the first column.

6. The battery top cover according to claim 1, characterized in that: The inner diameter of the pole collar is less than or equal to the inner diameter of the sealing ring; The outer diameter of the pole collar is greater than or equal to the outer diameter of the sealing ring.

7. The battery top cover according to claim 1, characterized in that: A first step groove is provided on the outer side of the top cover sheet; The sealing ring is arranged in the first step groove.

8. The battery top cover according to claim 1, characterized in that: A second step groove surrounding the pole hole is provided on the inner side surface of the plastic sheet; The pole bottom plate is arranged in the second step groove; The pole bottom plate is provided with a bulge; The bulge protrudes toward a side close to the pole and extends into the pole hole; The bulge is connected to the pole.

9. The battery top cover according to claim 1, characterized in that: A second anti-rotation structure is provided between the outer side surface of the top cover sheet and the plastic member to prevent the plastic member from rotating relative to the top cover sheet; The second anti-rotation structure includes a positioning ring and a positioning column arranged on the outer side of the top cover sheet; The positioning ring surrounds the pole hole; The positioning column is arranged between the positioning ring and the pole hole; The second anti-rotation structure also includes an annular groove and a cylindrical groove provided on the plastic part; The annular groove surrounds the pole collar, and the cylindrical groove is arranged between the annular groove and the pole collar; The positioning ring is arranged in the annular groove, and the positioning column is arranged in the cylindrical groove.

10. A battery, characterized in that: The battery top cover comprises the battery top cover according to any one of claims 1 to 9.

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