Battery cover plate assembly and battery with same

Abstract

The utility model provides a battery cover plate assembly and a battery with the battery cover plate assembly, and the battery cover plate assembly comprises a cover plate body which is provided with a first mounting hole; the sealing ring is arranged in the first mounting hole in a sleeved mode, a first annular groove is formed in the outer side of the sealing ring, and part of the cover plate body is embedded into the first annular groove; wherein one of the groove wall of the first annular groove and the cover plate body is provided with a protrusion, the other one of the groove wall of the first annular groove and the cover plate body is provided with a groove, and the groove wall of the first annular groove and the cover plate body are matched in an inserted mode through the protrusion and the groove. According to the scheme, the groove wall of the first annular groove is matched with the cover plate body through the insertion of the bulge and the groove, so that the contact area of the sealing ring and the cover plate body is increased, the matching of the sealing ring and the cover plate body is firmer, the moving probability of the sealing ring relative to the cover plate body is reduced, and the air tightness of the battery cover plate assembly is further improved.

Description

Technical Field

[0001] This utility model relates to the technical field of batteries, and more specifically, to a battery cover assembly and a battery having the same. Background Technology

[0002] Currently, the battery cover assembly includes a cover body, a sealing ring, a terminal post, and a positive terminal adapter plate. The sealing ring is located in the mounting hole of the cover body, and the cross-section of the sealing ring is U-shaped to partially enclose the cover body.

[0003] The circular battery cover assembly is relatively small. During the assembly process, the sealing ring is greatly affected by riveting force and welding temperature, which can easily cause the sealing ring to crack. This can create gaps between the sealing ring and the cover body, causing the sealing ring to move relative to the cover body and thus affecting the airtightness.

[0004] There is currently no effective solution to the technical problem that cracking of the sealing ring can cause it to move relative to the cover plate body. Utility Model Content

[0005] The main objective of this invention is to provide a battery cover assembly and a battery having the same, in order to solve the technical problem in the prior art where cracking of the sealing ring easily leads to the movement of the sealing ring relative to the cover body.

[0006] To achieve the above objectives, according to one aspect of the present invention, a battery cover assembly is provided, comprising: a cover body having a first mounting hole; a sealing ring having a first annular groove on its outer side, and a portion of the cover body being embedded in the first annular groove; wherein, one of the groove wall of the first annular groove and the cover body has a protrusion, and the other of the groove wall of the first annular groove and the cover body has a groove, and the groove wall of the first annular groove and the cover body are engaged by the protrusion and the groove.

[0007] Furthermore, the first annular groove has a first groove wall and a second groove wall, which are arranged opposite to each other. The first groove wall has at least one protrusion, which is engaged with a groove on the top surface of the cover plate body. The second groove wall has at least one protrusion, which is engaged with a groove on the bottom surface of the cover plate body.

[0008] Furthermore, the top surface of the cover plate body is provided with a second annular groove, which surrounds the first mounting hole, and part of the sealing ring extends into the second annular groove.

[0009] Furthermore, the battery cover assembly also includes: a terminal post, which passes through a first mounting hole, a sealing ring located between the cover body and the terminal post, and the terminal post being pressed against the top surface of the cover body through the sealing ring; an isolation positioning ring, the top surface of which abuts against the cover body, the isolation positioning ring having a second mounting hole, a portion of the sealing ring extending into the second mounting hole and abutting against the hole wall of the second mounting hole; and a positive electrode adapter plate, the top surface of which abuts against the bottom surface of the isolation positioning ring, the positive electrode adapter plate having a third mounting hole, the terminal post extending into the third mounting hole after passing through the first mounting hole, and the terminal post being welded to the positive electrode adapter plate.

[0010] Furthermore, a third annular groove is provided at one end of the sealing ring near the top surface of the cover plate body. A stepped surface is formed between the third annular groove and the inner ring of the sealing ring. Part of the pole extends into the third annular groove and abuts against the stepped surface.

[0011] Furthermore, a blocking part is provided at the end of the pole near the positive electrode adapter plate. The blocking part extends outward along the circumference of the pole. The outer diameter of the blocking part is larger than the diameter of the third mounting hole. The blocking part abuts against the end of the positive electrode adapter plate away from the isolation positioning ring.

[0012] Furthermore, the blocking part is a tapered post formed on the pole post, and the edge of the third mounting hole is chamfered, and the tapered post is welded to the chamfer.

[0013] Furthermore, the pole post has a stepped shaft structure, comprising a first shaft segment, a second shaft segment, and a third shaft segment, which are connected sequentially. The shaft diameter of the first shaft segment is larger than that of the second shaft segment, and the shaft diameter of the third shaft segment is smaller than that of the second shaft segment. The inner diameter of the sealing ring is larger than the diameter of the third mounting hole. The first shaft segment is pressed against the top surface of the cover plate body through the sealing ring, the second shaft segment is interference-fitted with the inner wall of the sealing ring, and the third shaft segment is interference-fitted with the third mounting hole.

[0014] Furthermore, the isolation positioning ring includes: a first positioning block, which is located at one end of the isolation positioning ring near the cover plate body and is inserted into a first positioning groove on the cover plate body; and a second positioning block, which is located at one end of the isolation positioning ring near the positive electrode adapter plate and is inserted into a second positioning groove on the positive electrode adapter plate.

[0015] According to another aspect of the present invention, a battery is provided, the battery including a battery cover assembly, the battery cover assembly being the aforementioned battery cover assembly.

[0016] Applying the technical solution of this utility model, the sealing ring is bonded to the first mounting hole of the cover plate body, and a portion of the cover plate body is embedded in the first annular groove of the sealing ring. The groove wall of the first annular groove and the cover plate body are engaged through a protrusion and a groove. In the above solution, the engagement between the groove wall of the first annular groove and the cover plate body through a protrusion and a groove increases the contact area between the sealing ring and the cover plate body, making the fit between the sealing ring and the cover plate body more secure, reducing the probability of the sealing ring moving relative to the cover plate body, and thus improving the airtightness of the battery cover plate assembly. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A cross-sectional view of the battery cover assembly of this utility model is shown;

[0019] Figure 2 An exploded view of the battery cover assembly of this utility model is shown;

[0020] Figure 3 A schematic diagram of the cover plate body in this utility model is shown;

[0021] Figure 4 A schematic diagram of the pole post in this utility model is shown;

[0022] Figure 5 A schematic diagram of the isolation positioning ring in this utility model is shown.

[0023] The above figures include the following reference numerals:

[0024] 1. Cover plate body;

[0025] 11. Second annular groove; 12. First mounting hole; 13. Groove;

[0026] 2. Sealing ring;

[0027] 21. First annular groove; 22. Protrusion; 23. Third annular groove;

[0028] 3. Pole post;

[0029] 31. First shaft section; 32. Second shaft section; 33. Third shaft section; 34. Blocking part;

[0030] 4. Isolation positioning ring;

[0031] 41. First positioning block; 42. Second positioning block; 43. Second mounting hole;

[0032] 5. Positive electrode adapter plate;

[0033] 51. Second positioning groove; 52. Third mounting hole; 53. Chamfer. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0038] Combination Figures 1 to 5 As shown, according to a specific embodiment of this application, a battery cover assembly is provided.

[0039] Specifically, the battery cover assembly includes a cover body 1 and a sealing ring 2. The cover body 1 has a first mounting hole 12, the sealing ring 2 is fitted into the first mounting hole 12, and the outer side of the sealing ring 2 has a first annular groove 21. A portion of the cover body 1 is embedded in the first annular groove 21. One of the groove wall of the first annular groove 21 and the cover body 1 has a protrusion 22, and the other of the groove wall of the first annular groove 21 and the cover body 1 has a groove 13. The groove wall of the first annular groove 21 and the cover body 1 are engaged through the protrusion 22 and the groove 13.

[0040] In the embodiments of this application, the sealing ring 2 is bonded to the first mounting hole 12 of the cover plate body 1, and a portion of the cover plate body 1 is embedded in the first annular groove 21 of the sealing ring 2. The groove wall of the first annular groove 21 and the cover plate body 1 are engaged through a protrusion 22 and a groove 13. In the above solution, the engagement between the groove wall of the first annular groove 21 and the cover plate body 1 through the protrusion 22 and the groove 13 increases the contact area between the sealing ring 2 and the cover plate body 1, making the fit between the sealing ring 2 and the cover plate body 1 more secure, reducing the probability of the sealing ring 2 moving relative to the cover plate body 1, and thus improving the airtightness of the battery cover plate assembly.

[0041] It should be noted that the sealing ring 2 is bonded to the first mounting hole 12 of the cover plate body 1 by an adhesive injection process. When the sealing ring 2 contracts or expands, the sealing ring 2 and the groove wall of the first annular groove 21 are positioned by the insertion of the protrusion 22 and the groove 13 to prevent the sealing ring 2 from moving relative to the cover plate body 1.

[0042] In one exemplary embodiment of this application, the first annular groove 21 has a first groove wall and a second groove wall, which are disposed opposite to each other. The first groove wall has at least one protrusion 22, which engages with a groove 13 on the top surface of the cover plate body 1. The second groove wall also has at least one protrusion 22, which engages with a groove 13 on the bottom surface of the cover plate body 1. The protrusions 22 on both the first and second groove walls further increase the contact area between the sealing ring 2 and the cover plate body 1.

[0043] like Figure 1 , Figure 3 As shown, the first annular groove 21 has a first protrusion 22 on its first groove wall, which is an annular structure extending circumferentially along the first groove wall. The second annular groove 11 has a second protrusion 22 on its second groove wall, which is also an annular structure extending circumferentially along the second groove wall. The inner diameter of the second protrusion 22 is larger than the inner diameter of the first protrusion 22, and the outer diameter of the second protrusion 22 is larger than the outer diameter of the first protrusion 22. Correspondingly, the groove 13 on the cover plate body 1 is an annular structure.

[0044] In one exemplary embodiment of this application, the top surface of the cover plate body 1 is provided with a second annular groove 11, which surrounds the first mounting hole 12, and a portion of the sealing ring 2 extends into the second annular groove 11. The partial extension of the sealing ring 2 into the second annular groove 11 further increases the contact area between the sealing ring 2 and the cover plate body 1.

[0045] like Figure 1 , Figure 3 As shown, the top surface of the cover plate body 1 is provided with a second annular groove 11, and the bottom wall of the second annular groove 11 is provided with a groove 13. The first groove wall of the sealing ring 2 is connected to the bottom wall of the second annular groove 11, and the second groove wall of the sealing ring 2 is connected to the bottom surface of the cover plate body 1.

[0046] In one exemplary embodiment of this application, the battery cover assembly further includes: a terminal post 3, an insulating positioning ring 4, and a positive electrode adapter plate 5. The terminal post 3 passes through a first mounting hole 12, and a sealing ring 2 is located between the cover body 1 and the terminal post 3. The terminal post 3 is pressed against the top surface of the cover body 1 through the sealing ring 2. The top surface of the insulating positioning ring 4 abuts against the cover body 1. The insulating positioning ring 4 has a second mounting hole 43, and a portion of the sealing ring 2 extends into the second mounting hole 43 and abuts against the hole wall of the second mounting hole 43. The top surface of the positive electrode adapter plate 5 abuts against the bottom surface of the insulating positioning ring 4. The positive electrode adapter plate 5 has a third mounting hole 52. The terminal post 3 extends into the third mounting hole 52 after passing through the first mounting hole 12, and the terminal post 3 is welded to the positive electrode adapter plate 5.

[0047] Preferably, a third annular groove 23 is provided at one end of the sealing ring 2 near the top surface of the cover plate body 1. A stepped surface is formed between the third annular groove 23 and the inner ring of the sealing ring 2. Part of the pole post 3 extends into the third annular groove 23 and abuts against the stepped surface. The partial extension of the pole post 3 into the third annular groove 23 and pressing it against the sealing ring 2 increases the contact area between the pole post 3 and the sealing ring 2, thereby making the connection between the sealing ring 2 and the cover plate body 1 more secure.

[0048] Furthermore, a blocking portion 34 is provided at the end of the pole post 3 near the positive electrode adapter plate 5. The blocking portion 34 extends outward along the circumference of the pole post 3, and the outer diameter of the blocking portion 34 is larger than the diameter of the third mounting hole 52. The blocking portion 34 abuts against the end of the positive electrode adapter plate 5 away from the isolation positioning ring 4. There is a perpendicular force between the blocking portion 34 and the positive electrode adapter plate 5. This force is transmitted to the sealing ring 2 through the isolation positioning ring 4, thereby increasing the pressing force between the sealing ring 2 and the cover plate body 1, making the connection between the sealing ring 2 and the cover plate body 1 more secure.

[0049] Preferably, such as Figure 1 , Figure 4As shown, the blocking part 34 is a conical column formed on the pole post 3, and a chamfer 53 is provided at the edge of the third mounting hole 52. The conical column is welded to the chamfer 53. By setting the blocking part 34 as a conical column, the conical column is easy to deform under force, which facilitates the insertion and mating of the blocking part 34 with the positive electrode adapter plate 5.

[0050] In an exemplary embodiment of this application, the pole post 3 is a stepped shaft structure, comprising a first shaft segment 31, a second shaft segment 32, and a third shaft segment 33, which are connected sequentially. The shaft diameter of the first shaft segment 31 is larger than that of the second shaft segment 32, and the shaft diameter of the third shaft segment 33 is smaller than that of the second shaft segment 32. The inner diameter of the sealing ring 2 is larger than the diameter of the third mounting hole 52. The first shaft segment 31 is pressed against the top surface of the cover plate body 1 through the sealing ring 2, the second shaft segment 32 is press-fitted with the inner wall of the sealing ring 2, and the third shaft segment 33 is press-fitted with the third mounting hole 52. By designing the pole post 3 as a stepped shaft structure, the sealing ring 2, the isolation positioning ring 4, and the positive electrode adapter plate 5 are limited in the axial direction of the pole post 3.

[0051] Specifically, such as Figure 1 , Figure 4 As shown, the first shaft segment 31 extends into the third annular groove 23 of the sealing ring 2, and the first shoulder formed by the first shaft segment 31 and the second shaft segment 32 is press-fitted with the sealing ring 2; the second shaft segment 32 extends into the inner ring of the sealing ring 2, and the second shoulder formed between the second shaft segment 32 and the third shaft segment 33 is press-fitted with the top surface of the positive electrode adapter plate 5; the third shaft segment 33 extends into the third mounting hole 52 of the positive electrode adapter plate 5, and the third shoulder formed by the blocking part 34 and the third shaft segment 33 is press-fitted with the bottom surface of the positive electrode adapter plate 5.

[0052] In one exemplary embodiment of this application, the isolation positioning ring 4 includes: a first positioning block 41 and a second positioning block 42. The first positioning block 41 is disposed at one end of the isolation positioning ring 4 near the cover plate body 1 and is inserted into a first positioning groove on the cover plate body 1. The second positioning block 42 is disposed at one end of the isolation positioning ring 4 near the positive electrode adapter plate 5 and is inserted into a second positioning groove 51 on the positive electrode adapter plate 5.

[0053] Specifically, such as Figure 2 , Figure 5 As shown, there are two first positioning blocks 41 and two second positioning blocks 42, with each first positioning block 41 and second positioning block 42 corresponding to the other. The first positioning block 41 is designed to prevent relative rotation between the isolation positioning ring 4 and the cover plate body 1, wherein the inner ring of the isolation positioning ring 4 abuts against the outer wall of the sealing ring 2. The second positioning block 42 is designed to prevent relative rotation between the isolation positioning ring 4 and the positive electrode adapter plate 5. The above structural design prevents the sealing ring 2 from detaching from the electrode post 3 or the cover plate body 1 due to external torque.

[0054] According to another specific embodiment of this application, a battery is provided, the battery including a battery cover assembly, the battery cover assembly being the battery cover assembly in the above embodiment.

[0055] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0056] The sealing ring 2 is bonded to the first mounting hole 12 of the cover plate body 1, and a portion of the cover plate body 1 is embedded in the first annular groove 21 of the sealing ring 2. The groove wall of the first annular groove 21 and the cover plate body 1 are engaged through a protrusion 22 and a groove 13. In the above scheme, the engagement between the groove wall of the first annular groove 21 and the cover plate body 1 through the protrusion 22 and the groove 13 increases the contact area between the sealing ring 2 and the cover plate body 1, making the fit between the sealing ring 2 and the cover plate body 1 more secure, reducing the probability of the sealing ring 2 moving relative to the cover plate body 1, and thus improving the airtightness of the battery cover plate assembly.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0059] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cover assembly, characterized in that, include: The cover plate body (1) is provided with a first mounting hole (12); A sealing ring (2) is fitted inside the first mounting hole (12). A first annular groove (21) is provided on the outer side of the sealing ring (2). Part of the cover plate body (1) is embedded in the first annular groove (21). In this case, one of the groove wall of the first annular groove and the cover plate body (1) is provided with a protrusion (22), and the other of the groove wall of the first annular groove (21) and the cover plate body (1) is provided with a groove (13). The groove wall of the first annular groove (21) and the cover plate body (1) are connected and engaged by the protrusion (22) and the groove (13).

2. The battery cover assembly according to claim 1, characterized in that, The first annular groove has a first groove wall and a second groove wall, which are arranged opposite to each other. The first groove wall is provided with at least one protrusion (22), which is inserted into the groove (13) on the top surface of the cover plate body (1) through the protrusion (22). The second groove wall is provided with at least one protrusion (22), which is inserted into the groove (13) on the bottom surface of the cover plate body (1) through the protrusion (22).

3. The battery cover assembly according to claim 1 or 2, characterized in that, The top surface of the cover plate body (1) is provided with a second annular groove (11), which surrounds the first mounting hole (12), and part of the sealing ring (2) extends into the second annular groove (11).

4. The battery cover assembly according to claim 1, characterized in that, The battery cover assembly also includes: The pole (3) is inserted into the first mounting hole (12), the sealing ring (2) is located between the cover plate body (1) and the pole (3), and the pole (3) is pressed against the top surface of the cover plate body (1) through the sealing ring (2); An isolation positioning ring (4) is provided, the top surface of which abuts against the cover plate body (1). The isolation positioning ring (4) is provided with a second mounting hole (43). Part of the sealing ring (2) extends into the second mounting hole (43) and abuts against the hole wall of the second mounting hole (43). A positive electrode adapter plate (5) is provided, the top surface of which abuts against the bottom surface of the isolation positioning ring (4). The positive electrode adapter plate (5) is provided with a third mounting hole (52). The pole post (3) extends into the third mounting hole (52) after passing through the first mounting hole (12), and the pole post (3) is welded to the positive electrode adapter plate (5).

5. The battery cover assembly according to claim 4, characterized in that, The sealing ring (2) has a third annular groove (23) at one end near the top surface of the cover plate body (1). The third annular groove (23) and the inner ring of the sealing ring (2) form a stepped surface. Part of the pole post (3) extends into the third annular groove (23) and abuts against the stepped surface.

6. The battery cover assembly according to claim 4, characterized in that, The end of the pole (3) near the positive electrode adapter plate (5) is provided with a blocking part (34). The blocking part (34) extends outward along the circumference of the pole (3). The outer diameter of the blocking part (34) is larger than the diameter of the third mounting hole (52). The blocking part (34) abuts against the end of the positive electrode adapter plate (5) away from the isolation positioning ring (4).

7. The battery cover assembly according to claim 6, characterized in that, The blocking part (34) is a tapered post formed on the pole post (3), and the edge of the third mounting hole (52) is provided with a chamfer (53), and the tapered post is welded to the chamfer (53).

8. The battery cover assembly according to claim 4, characterized in that, The pole post (3) is a stepped shaft structure. The pole post (3) includes a first shaft segment (31), a second shaft segment (32) and a third shaft segment (33). The first shaft segment (31), the second shaft segment (32) and the third shaft segment (33) are connected in sequence. The shaft diameter of the first shaft segment (31) is greater than the shaft diameter of the second shaft segment (32), and the shaft diameter of the third shaft segment (33) is smaller than the shaft diameter of the second shaft segment (32). The inner diameter of the sealing ring (2) is larger than the diameter of the third mounting hole (52). The first shaft segment (31) is pressed against the top surface of the cover plate body (1) through the sealing ring (2). The second shaft segment (32) is interference-fitted with the inner wall of the sealing ring (2). The third shaft segment (33) is interference-fitted with the third mounting hole (52).

9. The battery cover assembly according to claim 4, characterized in that, The isolation positioning ring (4) includes: The first positioning block (41) is located at one end of the isolation positioning ring (4) near the cover plate body (1), and the first positioning block (41) is inserted into the first positioning groove on the cover plate body (1). The second positioning block (42) is located at one end of the isolation positioning ring (4) near the positive electrode adapter plate (5), and the second positioning block (42) is inserted into the second positioning groove (51) on the positive electrode adapter plate (5).

10. A battery, said battery comprising a battery cover assembly, characterized in that, The battery cover assembly is the battery cover assembly according to any one of claims 1-9.

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