Cover plate assembly and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a cover plate assembly and a battery, the cover plate assembly comprises: a cover plate body, which is provided with a pole and a liquid injection hole, and the pole and the liquid injection hole are distributed at two sides of the cover plate body along the length direction; the insulating part is arranged on one side, facing the battery cell pole group, of the cover plate body; the riveting block is used for connecting the cover plate body with the insulating part in a riveting manner, and meanwhile, the riveting block is arranged on the pole in a penetrating manner, so that the pole is fixedly connected with the cover plate body; the positioning assembly is provided with a male head and a female head which are matched with each other, one of the male head and the female head is arranged at the position, close to the liquid injection hole, of the cover plate body, and the other is arranged on the insulating part. According to the cover plate assembly provided by the utility model, the cover plate body close to one side of the liquid injection hole can be ensured to be positioned and matched with the insulating part, the cover plate body and the insulating part are prevented from moving relatively during assembly, and the positioning and matching precision of the cover plate body close to one side of the liquid injection hole and the insulating part is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a cover plate assembly and a battery. Background Art

[0002] The battery cover plate is mainly assembled by processing methods such as riveting and welding. For some batteries with double-sided lead-out electrode posts, only one type of polar electrode post is provided on one side of the cover plate, and the electrode post is usually arranged on one side of the cover plate along the length direction. When positioning each component, the positioning mechanism of the insulating part and the cover plate body is usually located on the side close to the electrode post, and is far away from the other side of the cover plate.

[0003] Due to the non-central positioning mechanism, it is easy to cause a large deviation on the side of the insulating part away from the electrode post, with the risk of exceeding the chamfered edge of the cover plate body, which affects the assembly of the cover plate and the housing in the subsequent process. Secondly, during the riveting process, when the components of the cover plate are unevenly stressed, the side of the insulating part away from the electrode post will also be skewed, thereby affecting the assembly accuracy. Summary of the Utility Model

[0004] In view of this, the utility model provides a cover plate assembly and a battery to solve the problem that the positioning mechanisms of the insulating part and the cover plate body are not centered, which easily leads to a large deviation on one side of the insulating part.

[0005] In a first aspect, the utility model provides a cover plate assembly, including:

[0006] A cover plate body, on which an electrode post is provided and a liquid injection hole is opened, and the electrode post and the liquid injection hole are distributed on both sides of the cover plate body along the length direction;

[0007] An insulating part, arranged on the side of the cover plate body facing the electrode group of the battery cell;

[0008] A riveting block, which rivets and connects the cover plate body and the insulating part, and the riveting block simultaneously penetrates through the electrode post to fixedly connect the electrode post and the cover plate body;

[0009] A positioning assembly, having a male head and a female head that cooperate with each other, and one of the male head and the female head is arranged at a position on the cover plate body close to the liquid injection hole, and the other is arranged on the insulating part.

[0010] Beneficial Effects: The cover plate assembly provided by the embodiment of the utility model, by setting the positioning assembly, which has a male head and a female head that cooperate with each other, and one of the male head and the female head is arranged at a position on the cover plate body close to the liquid injection hole, and the other is arranged on the insulating part, can ensure the positioning cooperation between the cover plate body and the insulating part on the side close to the liquid injection hole, avoid relative movement between the cover plate body and the insulating part during assembly, ensure the positioning cooperation accuracy between the cover plate body and the insulating part on the side close to the liquid injection hole, and prevent the situation that the insulating part is largely deviated and exceeds the chamfered edge of the cover plate body.

[0011] In an alternative embodiment, the positioning component includes a positioning groove and a positioning boss; the positioning groove is arranged on one side of the cover plate body facing the insulating part, and the positioning groove is arranged around the liquid injection hole; the positioning boss is arranged on one side of the insulating part facing the cover plate body; the positioning boss is adapted to be fitted into the positioning groove.

[0012] Beneficial effects: The positioning groove and the positioning boss, as a specific implementation form of the positioning component with a male head and a female head that cooperate with each other, can ensure the mutual limitation of the cover plate body and the insulating part, avoid relative movement between the cover plate body and the insulating part during assembly, and prevent the situation that the insulating part is displaced greatly beyond the chamfered edge of the cover plate body.

[0013] In an alternative embodiment, a through hole is formed through the positioning boss, and along a plane perpendicular to the plane where the cover plate body is located, at least part of the projection of the liquid injection hole overlaps with the through hole.

[0014] Beneficial effects: By forming a through hole through the positioning boss, and along a plane perpendicular to the plane where the cover plate body is located, at least part of the projection of the liquid injection hole overlaps with the through hole, it is convenient for the electrolyte to pass through the through hole and enter the battery interior, avoiding obstruction of the liquid injection by the insulating part and ensuring the smooth injection of the electrolyte.

[0015] In an alternative embodiment, the positioning boss is configured as a ring shape, and the outer peripheral side of the positioning boss is connected to the main body part of the insulating part via a support arm.

[0016] Beneficial effects: The outer peripheral side of the positioning boss is connected to the main body part of the insulating part via a support arm, which not only meets the support for the positioning boss but also ensures a large current-carrying area in the area near the positioning boss, guaranteeing the smooth injection of the electrolyte.

[0017] In an alternative embodiment, a guiding part is formed by inclining the edge of the positioning boss near the through hole, and the guiding part is adapted to guide when the positioning boss is embedded into the positioning groove.

[0018] Beneficial effects: The guiding part is adapted to guide when the positioning boss is embedded into the positioning groove, preventing interference between the insulating part and the liquid injection hole ring platform of the cover plate body during the assembly process, avoiding scratches, and improving the assembly efficiency.

[0019] In an alternative embodiment, a liquid injection hole ring platform is formed on the circumferential edge of the liquid injection hole, and the liquid injection hole ring platform is adapted to extend into the through hole.

[0020] Beneficial effects: After the liquid injection hole ring platform extends into the through hole, it can further cooperate with the positioning boss. On the one hand, it can ensure the smooth injection of the electrolyte, and on the other hand, it enables the cover plate body and the insulating part to have good positioning on one side of the pole column.

[0021] In an alternative embodiment, in a direction perpendicular to the plane of the cover plate body, the depth of the positioning groove is H1, and the protruding height of the positioning boss is H2, satisfying: H2 < H1.

[0022] Beneficial effect: Thus, after the positioning boss extends into the positioning groove, the fitting of the cover plate body and the insulating part is ensured, and the situation that the positioning boss jacks up the cover plate body is avoided.

[0023] In an alternative embodiment, along the radial direction of the liquid injection hole, the liquid injection hole annular platform and the positioning groove are continuously arranged, and the outer peripheral side of the liquid injection hole annular platform is inclined to guide the guiding part.

[0024] Beneficial effect: By further inclining the outer peripheral side of the liquid injection hole annular platform, it can ensure that the outer peripheral side of the liquid injection hole annular platform guides the guiding part, making the cooperation between the cover plate body and the insulating part more convenient, ensuring smooth assembly, and improving the installation efficiency.

[0025] In an alternative embodiment, the positioning groove is configured as an annular groove, and the positioning boss is configured as an annular shape;

[0026] The outer diameter of the positioning groove is Y2, and the inner diameter of the positioning groove is Y1;

[0027] The outer diameter of the positioning boss is W2, and the inner diameter of the positioning boss is W1;

[0028] Satisfying: Y2 > W2; Y1 < W1.

[0029] Beneficial effect: By defining Y2 > W2 and Y1 < W1, it can ensure that the positioning boss is completely embedded in the positioning groove, while ensuring the positioning effect, avoiding interference during the assembly process, and improving the installation efficiency.

[0030] In a second aspect, the present utility model further provides a battery, including: the cover plate assembly as described above.

[0031] Since the battery includes the cover plate assembly and has the same effects as the cover plate assembly, it will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is an exploded view of the cover plate assembly of the present utility model;

[0034] Figure 2 It is a partially enlarged view of the insulating part of the present utility model;

[0035] Figure 3 It is a partially enlarged view of the cover plate body of the present utility model;

[0036] Figure 4 It is a cross-sectional view of the cover plate assembly of the present utility model;

[0037] Figure 5 is Figure 4 the enlarged view at position A in

[0038] Figure 6 It is an enlarged view of the mating position of the positioning sunk groove and the positioning boss of the present utility model;

[0039] Figure 7 It is a partially enlarged view of the cross-sectional state of the cover plate body of the present utility model;

[0040] Figure 8 It is a partially enlarged view of the insulating part of the present utility model from a top-down perspective.

[0041] Explanation of reference numerals:

[0042] 1. Cover plate body; 11. Liquid injection hole; 12. Positioning sunk groove; 13. Liquid injection hole ring platform; 14. Terminal post;

[0043] 2. Insulating part; 21. Positioning boss; 211. Guide part; 22. Support arm; 23. Through hole; 3. Riveting block. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0045] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0046] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0047] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0048] The following Figures 1 to 8 , describes the embodiments of the present utility model.

[0049] According to an embodiment of the present utility model, on the one hand, a cover plate assembly is provided, including:

[0050] A cover plate body 1, on which a pole post 14 is provided, and a liquid injection hole 11 is opened. The pole post 14 and the liquid injection hole 11 are distributed on both sides of the cover plate body 1 along the length direction;

[0051] An insulating member 2, arranged on one side of the cover plate body 1 facing the battery cell pole group;

[0052] A riveting block 3, which rivets and connects the cover plate body 1 and the insulating member 2, and the riveting block 3 simultaneously penetrates through the pole post 14 to fixedly connect the pole post 14 and the cover plate body 1;

[0053] A positioning assembly, having a male head and a female head that cooperate with each other. One of the male head and the female head is arranged at a position on the cover plate body 1 close to the liquid injection hole 11, and the other is arranged on the insulating member 2.

[0054] Since the pole post 14 and the liquid injection hole 11 are distributed on both sides of the cover plate body 1 along the length direction, at this time, the riveting block 3 rivets and connects the cover plate body 1 and the insulating member 2, and simultaneously penetrates through the pole post 14 to fixedly connect the pole post 14 and the cover plate body 1. This enables the cover plate body 1 and the insulating member 2 to have good positioning on one side of the pole post 14.

[0055] On the side close to the liquid injection hole 11, if the positioning mechanism is not provided, it is easy to cause a large deviation of the insulating part 2 on the side close to the liquid injection hole 11, with the risk of exceeding the chamfered edge of the cover plate body, affecting the assembly of the cover plate and the housing in the subsequent process. In addition, during the riveting process, the riveting block 3 easily presses the cover plate body 1 and the insulating part 2 on the side close to the pole 14 tightly. Due to uneven force, the cover plate body 1 and the insulating part 2 on the side close to the liquid injection hole 11 are not closely attached, there is a certain gap, and even the insulating part 2 on the side close to the liquid injection hole 11 is skewed, thus affecting the assembly accuracy.

[0056] The cover plate assembly provided by the embodiment of the present utility model, by providing a positioning component, the positioning component has a male head and a female head that cooperate with each other. One of the male head and the female head is arranged at the position of the cover plate body 1 close to the liquid injection hole 11, and the other is arranged on the insulating part 2, so as to ensure the positioning cooperation between the cover plate body 1 and the insulating part 2 on the side close to the liquid injection hole 11, avoid relative movement between the cover plate body 1 and the insulating part 2 during assembly, ensure the positioning cooperation accuracy between the cover plate body 1 and the insulating part 2 on the side close to the liquid injection hole 11, and prevent the situation that the insulating part 2 is greatly deviated and exceeds the chamfered edge of the cover plate body 1.

[0057] In this embodiment, the positioning component has a male head and a female head that cooperate with each other. Among them, the specific structural forms of the male head and the female head can be the cooperation of a sunk groove and a boss, or the cooperation of a plug pin and a jack, or the cooperation of a lock tongue and a lock hole, etc. The positioning component aims to realize the mutual limitation between the cover plate body 1 and the insulating part 2.

[0058] In some embodiments, in combination Figure 2 、 Figure 3 As shown, the positioning component includes a positioning sunk groove 12 and a positioning boss 21; the positioning sunk groove 12 is arranged on the side of the cover plate body 1 facing the insulating part 2, and the positioning sunk groove 12 is arranged around the liquid injection hole 11; the positioning boss 21 is arranged on the side of the insulating part 2 facing the cover plate body 1; the positioning boss 21 is adapted to be fitted into the positioning sunk groove 12.

[0059] In this embodiment, the positioning sunk groove 12 and the positioning boss 21, as the specific implementation forms of the male head and the female head of the positioning component, can ensure the mutual limitation between the cover plate body 1 and the insulating part 2, avoid relative movement between the cover plate body 1 and the insulating part 2 during assembly, and prevent the situation that the insulating part 2 is greatly deviated and exceeds the chamfered edge of the cover plate body 1.

[0060] By arranging the positioning sunk groove 12 around the liquid injection hole 11, it is convenient to use the liquid injection hole 11 as a positioning reference, and improve the positioning accuracy between the cover plate body 1 and the insulating part 2.

[0061] In some embodiments, in combination Figure 2As shown, a through hole 23 is formed through the inside of the positioning boss 21, and in a plane perpendicular to the plane where the cover body is located, at least a part of the projection of the liquid injection hole 11 overlaps with the through hole 23.

[0062] After the cover body 1 and the battery housing are assembled, it is necessary to inject liquid into the battery through the liquid injection hole 11. In order to prevent the insulating member 2 from obstructing the liquid injection, a through hole 23 is formed through the inside of the positioning boss 21, and in a plane perpendicular to the plane where the cover body is located, at least a part of the projection of the liquid injection hole 11 overlaps with the through hole 23, so as to facilitate the electrolyte to pass through the through hole 23 and enter the battery interior, prevent the insulating member 2 from obstructing the liquid injection, and ensure the smooth injection of the electrolyte.

[0063] In some embodiments, as shown in Figure 2 the positioning boss 21 is configured as an annular shape, and the outer peripheral side of the positioning boss 21 is connected to the main body portion of the insulating member 2 via a support arm 22.

[0064] In order to further increase the current-carrying area of the insulating member 2, a hollowed-out area is formed between the main body portion of the insulating member 2 and the positioning boss 21, and the outer peripheral side of the positioning boss 21 is connected to the main body portion of the insulating member 2 via a support arm 22. Thus, it not only satisfies the support for the positioning boss 21 but also ensures that the area near the positioning boss 21 has a larger current-carrying area, guaranteeing the smooth injection of the electrolyte.

[0065] A plurality of support arms 22 are provided on the outer peripheral side of the positioning boss 21 to ensure the support strength.

[0066] In some embodiments, as shown in Figure 6 the edge of the positioning boss 21 on the side close to the through hole 23 is inclined to form a guiding portion 211, and the guiding portion 211 is adapted to guide when the positioning boss 21 is inserted into the positioning sink 12.

[0067] The guiding portion 211 is adapted to guide when the positioning boss 21 is inserted into the positioning sink 12, prevent interference between the insulating member 2 and the liquid injection hole ring platform 13 of the cover body 1 during the assembly process, avoid scratching, and improve the assembly efficiency.

[0068] In some embodiments, as shown in Figure 5 a liquid injection hole ring platform 13 is formed on the circumferential edge of the liquid injection hole 11, and the liquid injection hole ring platform 13 is adapted to extend into the interior of the through hole 23.

[0069] A liquid injection hole ring platform 13 is formed on the circumferential edge of the liquid injection hole 11. In this embodiment, in the direction perpendicular to the plane where the cover plate body is located, the liquid injection hole ring platform 13 protrudes from the surface of the cover plate body 1 facing the insulating member 2. Thus, after the liquid injection hole ring platform 13 extends into the through hole 23, the liquid injection hole ring platform 13 can be further engaged with the positioning boss 21. On the one hand, it can ensure the smooth injection of the electrolyte, and on the other hand, it enables the cover plate body 1 and the insulating member 2 to have good positioning on one side of the pole column 14.

[0070] In some embodiments, as shown in Figure 6 , in the direction perpendicular to the plane where the cover plate body is located, the depth of the positioning sink 12 is H1, and the protruding height of the positioning boss 21 is H2, satisfying: H2 < H1.

[0071] Thus, after the positioning boss 21 extends into the positioning sink 12, it ensures the fitting of the cover plate body 1 and the insulating member 2, and avoids the situation where the positioning boss 21 jacks up the cover plate body 1.

[0072] In some embodiments, as shown in Figure 6 , along the radial direction of the liquid injection hole 11, the liquid injection hole ring platform 13 and the positioning sink 12 are continuously arranged, and the outer peripheral side of the liquid injection hole ring platform 13 is inclined to guide the guiding portion 211.

[0073] By further inclining the outer peripheral side of the liquid injection hole ring platform 13, it can ensure that the outer peripheral side of the liquid injection hole ring platform 13 guides the guiding portion 211, which is more convenient for the cooperation between the cover plate body 1 and the insulating member 2, ensures smooth assembly, and improves the installation efficiency.

[0074] In some embodiments, as shown in Figure 7 and Figure 8 , the positioning sink 12 is configured as an annular groove, and the positioning boss 21 is configured as an annular shape;

[0075] The outer diameter of the positioning sink 12 is Y2, and the inner diameter of the positioning sink 12 is Y1;

[0076] The outer diameter of the positioning boss 21 is W2, and the inner diameter of the positioning boss 21 is W1;

[0077] Satisfying: Y2 > W2; Y1 < W1.

[0078] By defining Y2 > W2 and Y1 < W1, it can ensure that the positioning boss 21 is completely embedded in the positioning sink 12. While ensuring the positioning effect, it avoids interference during the assembly process and improves the installation efficiency.

[0079] According to an embodiment of the present invention, on the other hand, a battery is also provided, including: the cover plate assembly as described above.

[0080] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the present utility model.

Claims

1. A cover plate assembly, characterized in that, Comprising: A cover body, on which a pole post is provided and a liquid injection hole is formed. The pole post and the liquid injection hole are distributed on two sides of the cover body along the length direction; An insulating member, arranged on one side of the cover body facing the electrode group of the battery cell; A riveting block, which rivets and connects the cover body and the insulating member, and the riveting block simultaneously penetrates through the pole post to fixedly connect the pole post and the cover body; A positioning assembly, having a male head and a female head that cooperate with each other. One of the male head and the female head is arranged at a position on the cover body close to the liquid injection hole, and the other is arranged on the insulating member.

2. The cover plate assembly according to claim 1, characterized in that, The positioning assembly includes a positioning sink and a positioning boss; the positioning sink is arranged on one side of the cover body facing the insulating member, and the positioning sink surrounds the liquid injection hole; the positioning boss is arranged on one side of the insulating member facing the cover body; the positioning boss is adapted to be fitted into the positioning sink.

3. The cover plate assembly according to claim 2, wherein A through hole is formed through the inside of the positioning boss. Along a direction perpendicular to the plane where the cover body is located, at least part of the projection of the liquid injection hole overlaps with the through hole.

4. The cover plate assembly according to claim 2, characterized in that, The positioning boss is configured as an annular shape, and the outer peripheral side of the positioning boss is connected to the main body part of the insulating member via a support arm.

5. The cover plate assembly according to claim 3, wherein A guiding portion is inclinedly formed at an edge of the positioning boss close to the through hole, and the guiding portion is adapted to guide when the positioning boss is inserted into the positioning sink.

6. The cover plate assembly according to claim 5, wherein A liquid injection hole ring platform is formed at the circumferential edge of the liquid injection hole, and the liquid injection hole ring platform is adapted to extend into the inside of the through hole.

7. The cover plate assembly according to claim 2, characterized in that In a direction perpendicular to the plane where the cover body is located, the depth of the positioning sink is H1, and the protruding height of the positioning boss is H2, satisfying: H2 < H1.

8. The cover plate assembly according to claim 6, wherein, Along the radial direction of the liquid injection hole, the liquid injection hole ring platform and the positioning sink are continuously arranged, and the outer peripheral side of the liquid injection hole ring platform is inclined to guide the guiding portion.

9. The cover plate assembly according to claim 8, characterized in that, The positioning sink is configured as a circular ring groove, and the positioning boss is configured as a circular ring; The outer diameter of the positioning sink is Y2, and the inner diameter of the positioning sink is Y1; The outer diameter of the positioning boss is W2, and the inner diameter of the positioning boss is W1; Satisfying: Y2 > W2; Y1 < W1.

10. A battery, characterized in that, Including the cover assembly according to any one of claims 1 to 9 above.

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