Battery top cover and battery

Abstract

The utility model discloses a battery top cover and a battery. The battery top cover comprises a sealing ring as well as a pole, upper plastic, a substrate, lower plastic and a fixed plate which are sequentially arranged from top to bottom, the sealing ring comprises a first sealing part, a second sealing part and a sealing circular ring, a first hole is formed in the base plate, the inner wall of the first hole is attached to the outer wall of the sealing circular ring, the first sealing part is used for sealing the upper end face of the base plate, and the second sealing part is used for sealing the lower end face of the base plate. According to the battery top cover, the problem of poor sealing of the top cover plate is solved, the first sealing part and the second sealing part are arranged on the two sides of the sealing ring to seal the two sides of the substrate, the sealing performance of the whole battery top cover is further improved, and the safety of the battery is improved.

Description

Technical Field

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

[0002] With the development of the new energy industry, batteries are used in more and more fields. Conventional battery top cover structures generally use welding or injection molding to connect the top cover components. The existing technology will result in poor welding and cold welding. The injection molding structure is easily affected by temperature. When the battery's own temperature rises or is affected by the environment, it will expand and contract, affecting the battery's air tightness, thereby affecting the battery's overcurrent performance and battery safety.

[0003] The utility model patent with application number CN202122317807.6 proposes a battery top cover assembly, a battery top cover and a battery, wherein the battery top cover assembly sequentially arranges a connecting piece, a lower plastic, a top cover piece, an upper plastic and a pole terminal from bottom to top, arranges a connecting portion on the connecting piece, opens a first connecting hole on the lower plastic, opens a second connecting hole on the top cover piece, and opens a third connecting hole on the upper plastic, so that the connecting portion is penetrated in the sealing ring, the inner wall of the first connecting hole and the inner wall of the second connecting hole are both tightly attached to the outer wall of the sealing ring, and the top of the connecting portion sequentially passes through the first connecting hole, the second connecting hole and the third connecting hole and fits with the lower end face of the pole terminal, thereby realizing the assembly seal of the battery top cover assembly. However, the sealing ring of this structure realizes the sealing of the entire battery top cover by fitting the outer wall of the sealing ring with the lower plastic and the top cover piece. This structure will result in a non-sealing situation on one side of the top cover piece, and the electrolyte may penetrate into the position of the top cover piece, thereby affecting the safety of the battery. Utility Model Content

[0004] The utility model aims to provide a battery top cover and a battery, which solves the problem of poor sealing of the top cover sheet, and seals both sides of the substrate by arranging a first sealing part and a second sealing part on both sides of a sealing ring, thereby improving the sealing of the entire battery top cover and improving the safety of the battery.

[0005] The technical solution adopted by the utility model to solve its technical problem is, according to the first aspect, a battery top cover is proposed, including a sealing ring and a pole, an upper plastic, a substrate, a lower plastic, and a fixing plate arranged in sequence from top to bottom; the sealing ring includes a first sealing portion, a second sealing portion, and a sealing ring, a first hole is provided on the substrate, the inner wall of the first hole is in contact with the outer wall of the sealing ring, the first sealing portion is used to seal the upper end surface of the substrate, and the second sealing portion is used to seal the lower end surface of the substrate.

[0006] In an embodiment of the present application, a fixed edge is provided on one side of the first hole, the first sealing portion is a first sealing block integrally connected to the sealing ring, the first sealing block is connected to the sealing ring to form a fixed groove, and the fixed edge is embedded in the fixed groove.

[0007] In the embodiment of the present application, the second sealing portion is a second sealing block arranged perpendicular to the sealing ring, and the upper end surface of the second sealing block abuts against the lower end surface of the substrate.

[0008] In the embodiment of the present application, a connection groove is provided on the upper end surface of the upper plastic, and the pole is embedded in the connection groove.

[0009] In the embodiment of the present application, the lower end surface of the substrate is provided with a card slot, the upper end surface of the lower plastic is provided with a card edge that can be engaged with the card slot, the upper end surface of the lower plastic abuts the lower end surface of the substrate, and the lower plastic abuts the second sealing block.

[0010] In the embodiment of the present application, second holes are provided on both sides of the lower plastic, a heat dissipation ring is provided in the middle of the lower plastic, and the second holes cooperate with the first holes to fix the lower plastic.

[0011] In the embodiment of the present application, the pole cooperates with the upper plastic and passes through the upper plastic, the substrate and the lower plastic from top to bottom in sequence. The pole has a riveted flange, which is bent and abuts against the lower end surface of the lower plastic.

[0012] In an embodiment of the present application, the pole includes a positioning portion and a riveted portion, the positioning portion is connected to the riveted portion, the positioning portion abuts against the upper plastic, the riveted portion is inserted into the first hole, and the riveted flange is arranged at one end of the riveted portion away from the positioning portion.

[0013] In the embodiment of the present application, a boss is provided on the upper surface of the fixing plate, the boss is embedded in the pole, and the upper surface of the fixing plate abuts against the flanged portion of the pole.

[0014] According to a second aspect, a battery is provided, comprising a shell, a battery cell and a battery top cover, wherein the battery cell is placed in the shell, the shell is provided with an opening, and the battery top cover is sealed at the opening.

[0015] The beneficial effects of the utility model are:

[0016] 1. The battery top cover and the battery proposed by the utility model seal both sides of the substrate by arranging the first sealing part and the second sealing part on both sides of the sealing ring, thereby improving the sealing performance of the entire battery top cover and improving the safety of the battery;

[0017] 2. The battery cover and battery proposed by the utility model have a connection groove on the upper plastic surface, and one end of the pole can be embedded in the connection groove. The side wall of the connection groove can protect the pole and prevent the pole from colliding with other components;

[0018] 3. The utility model proposes a battery top cover and a battery, wherein a card slot is arranged on the lower end surface of the base plate, and a card connection edge is arranged on the upper end surface of the lower plastic, and the card connection edge can be embedded in the card slot. When the battery is assembled, the lower plastic and the base plate can be quickly positioned, thereby shortening the assembly time and improving the assembly efficiency of the battery top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the utility model and are used together with the description to explain the principles of the utility model. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the utility model, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is an exploded schematic diagram of a battery top cover according to an embodiment of the utility model;

[0021] Figure 2 A cross-sectional view of a battery top cover according to an embodiment of the utility model;

[0022] Figure 3 For the utility model embodiment Figure 2 The enlarged view of A in FIG.

[0023] Figure 4 A schematic diagram of the upper plastic of a battery top cover according to an embodiment of the utility model;

[0024] Figure 5 A schematic diagram of a sealing ring of a battery top cover according to an embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the lower end surface of a base plate of a battery top cover according to an embodiment of the utility model;

[0026] Figure 7 A schematic diagram of the lower plastic of a battery top cover according to an embodiment of the utility model;

[0027] Figure 8 A schematic diagram of a fixed bottom plate of a battery top cover according to an embodiment of the utility model;

[0028] Fig. 9 A schematic diagram of a pole of a battery top cover according to an embodiment of the utility model;

[0029] Fig.10 The figure is a schematic diagram of assembling a battery top cover according to an embodiment of the utility model.

[0030] In the figure: 1. sealing ring; 11. first sealing part; 12. second sealing part; 13. sealing ring; 2. pole; 21. riveted flange; 22. positioning part; 23. riveted part; 3. upper plastic; 31. connecting groove; 4. base plate; 41. first hole; 42. fixing edge; 43. fixing groove; 44. clamping groove; 5. lower plastic; 51. clamping edge; 52. second hole; 53. heat dissipation ring; 6. fixing plate; 61. boss. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the utility model and the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In addition, the design orientation only represents the relative position relationship between the components, not the absolute position relationship.

[0032] The utility model embodiment provides a battery top cover, see Figure 1-Figure 10 , mainly includes a sealing ring 1, a pole 2, an upper plastic 3, a base plate 4, a lower plastic 5 and a fixing plate 6.

[0033] First, see Figure 1-Figure 10 The battery top cover includes a sealing ring 1 and from top to bottom (with Figure 2 The pole 2, upper plastic 3, substrate 4, lower plastic 5, and fixing plate 6 are arranged in sequence (the perspective shown is a reference datum). Each adjacent component is fitted in abutting manner. The sealing ring 1 includes a first sealing portion 11, a second sealing portion 12, and a sealing ring 13. The first sealing portion 11, the second sealing portion 12, and the sealing ring 13 are connected in an integral manner. A first hole 41 is arranged on the substrate 4. The inner wall of the first hole 41 fits with the outer wall of the sealing ring 13. The first sealing portion 11 and the second sealing portion 12 are arranged on different sides of the substrate 4. The first sealing portion 11 is used to seal the upper end face of the substrate 4, and then seal the components arranged on one side of the upper end face of the substrate 4. The second sealing portion 12 is used to seal the lower end face of the substrate 4, and then seal the components arranged on one side of the lower end face of the substrate 4. The first sealing portion 11 and the second sealing portion 12 are arranged on both sides of the sealing ring 13 to seal both sides of the substrate 4, thereby improving the sealing performance of the entire battery top cover and improving the safety of the battery.

[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 5A fixing edge 42 is provided on one side of the first hole 41 close to the first sealing portion 11. The first sealing portion 11 is a first sealing block integrally connected to the sealing ring 13. The first sealing block is L-shaped. The first sealing block is connected to the sealing ring 13 to form a fixing groove 43. The fixing edge 42 can be embedded in the fixing groove 43 to improve the sealing between the sealing ring 1 and the upper plastic 3, and also to strengthen the stability of the connection between the sealing ring 1 and the substrate 4.

[0035] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 The second sealing portion 12 is a second sealing block arranged perpendicularly to the sealing ring 13, and the second sealing block abuts against the lower end surface of the substrate 4. The second sealing block and the first sealing block seal different sides of the substrate 4 to enhance the sealing effect of the substrate 4 and improve the safety of the battery.

[0036] See also Figure 4 A connecting groove 31 is provided on the upper end surface of the upper plastic 3, and one end of the pole 2 can be embedded in the connecting groove 31. The side wall of the connecting groove 31 can protect the pole 2 and prevent the pole 2 from colliding with other components.

[0037] See also Figure 6 The lower end surface of the substrate 4 is provided with a card slot 44, the upper end surface of the lower plastic 5 is provided with a card edge 51, the card edge 51 can be embedded in the card slot 44, the upper end surface of the lower plastic 5 abuts against the lower end surface of the substrate 4, and the lower plastic 5 abuts against the second sealing block. When assembling the battery, the lower plastic 5 and the substrate 4 can be quickly positioned, which shortens the assembly time and improves the assembly efficiency of the battery top cover.

[0038] See also Figure 7 A heat dissipation ring 53 is provided in the middle of the lower plastic 5. When the battery cell is thermally runaway, the gas in the battery cell can be quickly discharged to the outside of the battery through the heat dissipation ring 53, thereby ensuring the safe use of the battery.

[0039] See also Figure 7 The lower plastic 5 is provided with second holes 52 on both sides thereof, and the pole 2, the first hole 41 and the second hole 52 cooperate to fix the lower plastic 5, so that the adjacent surfaces between the components can be securely fitted.

[0040] For details, see Fig. 9The aperture of the second hole 52 is larger than that of the first hole 41. The pole 2 is divided into a riveted portion 23 and a positioning portion 22. The positioning portion 22 and the riveted portion 23 are connected in an integral manner. A riveted flange 21 is also provided at one end of the riveted portion 23 away from the positioning portion 22. The riveted portion 23 is a hollow cylindrical shape. The positioning portion 22 is engaged with the connecting groove 31 to fix the position of the pole 2. After the riveted portion 23 passes through the first hole 41 and the second hole 52, it is flanged from the inside to the outside and then riveted. During the flange riveting process, the riveted flange 21 of the pole 2 and the positioning portion 22 of the pole 2 are brought close to each other, thereby squeezing the upper plastic 3, the substrate 4, the lower plastic 5 and the sealing ring 1 between the riveted flange 21 of the pole 2 and the positioning portion 22 of the pole 2, so that the adjacent surfaces between the components can be safely fitted, further improving the production and assembly quality of the battery.

[0041] See also Figure 8 A boss 61 is provided on the upper end surface of the fixing plate 6, and the boss 61 can be embedded in the riveted portion 23 after the pole 2 is flanged. The upper end surface of the fixing plate 6 abuts against the flanged portion of the pole 2 to further improve the sealing performance of the battery top cover.

[0042] In the second aspect, the present embodiment further provides a battery, which includes a housing, a battery cell and the above-mentioned battery top cover, wherein the battery cell is placed in the housing, the housing is provided with an opening, and the battery top cover is sealed at the opening. The first sealing portion 11 and the second sealing portion 12 are provided on both sides of the sealing ring 13 to seal both sides of the substrate 4, thereby improving the sealing of the entire battery and improving the safety of the battery.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0044] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation methods, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A battery top cover, characterized in that: The invention comprises a sealing ring (1) and, arranged in order from top to bottom, a pole (2), an upper plastic (3), a substrate (4), a lower plastic (5), and a fixing plate (6); the sealing ring (1) comprises a first sealing portion (11), a second sealing portion (12), and a sealing ring (13); a first hole (41) is provided on the substrate (4); the inner wall of the first hole (41) is in contact with the outer wall of the sealing ring (13); the first sealing portion (11) is used to seal the upper end surface of the substrate (4); and the second sealing portion (12) is used to seal the lower end surface of the substrate (4).

2. A battery top cover according to claim 1, characterized in that: A fixing edge (42) is provided on one side of the first hole (41); the first sealing portion (11) is a first sealing block integrally connected to the sealing ring (13); the first sealing block and the sealing ring (13) are connected to form a fixing groove (43); and the fixing edge (42) is embedded in the fixing groove (43).

3. A battery top cover according to claim 1, characterized in that: The second sealing portion (12) is a second sealing block arranged perpendicularly to the sealing ring (13), and the upper end surface of the second sealing block abuts against the lower end surface of the substrate (4).

4. A battery top cover according to claim 1, characterized in that: A connection groove (31) is provided on the upper end surface of the upper plastic (3), and the pole (2) is embedded in the connection groove (31).

5. A battery top cover according to claim 3, characterized in that: The lower end surface of the substrate (4) is provided with a card slot (44), the upper end surface of the lower plastic (5) is provided with a card edge (51) that can be engaged with the card slot (44), the upper end surface of the lower plastic (5) abuts against the lower end surface of the substrate (4), and the lower plastic (5) abuts against the second sealing block.

6. A battery top cover according to claim 5, characterized in that: Second holes (52) are provided on both sides of the lower plastic (5), a heat dissipation ring (53) is provided in the middle of the lower plastic (5), and the second holes (52) cooperate with the first holes (41) to fix the lower plastic (5).

7. A battery top cover according to claim 1, characterized in that: The pole (2) cooperates with the upper plastic (3) and passes through the upper plastic (3), the base plate (4) and the lower plastic (5) in sequence from top to bottom. The pole (2) has a riveted flange (21), and the riveted flange (21) abuts against the lower end surface of the lower plastic (5) after being bent.

8. A battery top cover according to claim 7, characterized in that: The pole (2) comprises a positioning portion (22) and a riveted portion (23), the positioning portion (22) being connected to the riveted portion (23), the positioning portion (22) being in contact with the upper plastic (3), the riveted portion (23) being inserted into the first hole (41), and the riveted flange (21) being arranged at one end of the riveted portion (23) away from the positioning portion (22).

9. A battery top cover according to claim 8, characterized in that: A boss (61) is provided on the upper end surface of the fixing plate (6), the boss (61) is embedded in the pole (2), and the upper end surface of the fixing plate (6) abuts against the riveted flange (21).

10. A battery, characterized in that: It comprises a shell, a battery cell and a battery top cover according to any one of claims 1 to 9, wherein the battery cell is placed in the shell, the shell is provided with an opening, and the battery top cover is sealed at the opening.

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