Insulating part capable of stretching in length direction, battery top cover and battery

Abstract

The utility model discloses an insulating part capable of stretching and retracting in the length direction, a battery top cover and a battery, the insulating part comprises a first insulating part, a second insulating part and a connecting assembly, and the connecting assembly is arranged between the first insulating part and the second insulating part; the connecting assembly comprises a first elastic connecting piece and a second elastic connecting piece, the first elastic connecting piece is provided with a first opening and first connecting parts located at the two ends of the first opening, and the first connecting parts are connected with the first insulating piece and the second insulating piece respectively. The second elastic connecting piece is provided with a second opening and second connecting parts located at the two ends of the second opening, and the second connecting parts are connected with the first insulating piece and the second insulating piece respectively; and the first opening and the second opening face opposite directions. According to the technical scheme, the first elastic connecting piece and the second elastic connecting piece which are opposite in opening direction are arranged, so that the connecting assembly deforms to counteract component force in the front-back direction, and the front-back positioning of the insulating piece is more stable.

Description

Technical Field

[0001] The utility model belongs to the field of batteries, and particularly relates to an insulating part, a battery top cover and a battery which are telescopic in the length direction. Background Art

[0002] With the development of technology, power batteries are widely used as energy systems in electric vehicles.

[0003] In existing power batteries, there are a battery case, battery cells and a battery top cover. The battery cells are encapsulated in the battery case through the battery top cover. Specifically, the battery top cover includes pole columns, a top cover sheet and a lower plastic. Pole column mounting holes are provided on both the top cover sheet and the lower plastic. The pole columns pass through the pole column mounting holes and are used for the electrical connection between the battery cells and external electrical devices.

[0004] In addition, to prevent the pole columns from shifting due to the thermal expansion and contraction of the lower plastic part, Chinese Patent No. CN202222372003.0 discloses a top cover assembly and a single battery. The lower plastic part is set as spaced first connecting parts and second connecting parts. The first connecting part and the second connecting part are respectively connected to one pole column, and a buffer part is arranged between the first connecting part and the second connecting part to connect the first connecting part and the second connecting part. The spaced space between the first connecting part and the second connecting part is used to provide a deformation space during thermal expansion and contraction, so as to prevent the pole columns from being subjected to excessive traction force and causing the pole columns to shift. The buffer part deforms synchronously during the deformation process of the first connecting part and the second connecting part to effectively realize the connection between the first connecting part and the second connecting part.

[0005] Among them, in one implementation manner of the above patent, a plurality of V-shaped buffer parts arranged front and back are adopted, so that the V-shaped shape of the buffer parts is used to open or close the openings during the thermal expansion and contraction of the first connecting part and the second connecting part. However, the V-shaped openings of the buffer parts are all arranged backward, so that each buffer part has front and back component forces with the same orientation on the first connecting part and the second connecting part in the deformed state, and the component forces are superimposed, resulting in a large forward or backward shift of the first connecting part and the second connecting part at the buffer part, causing the misalignment of the installation of the insulating part. Summary of the Utility Model

[0006] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an insulating part, a battery top cover and a battery which are telescopic in the length direction. By setting a first elastic connecting part and a second elastic connecting part with opposite opening orientations, the connecting component deforms to offset the component forces in the front and back directions, so that the front and back positioning of the insulating part is more stable.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] An insulating member that is retractable in length direction, characterized in that it includes a first insulating member, a second insulating member and a connecting assembly, wherein the connecting assembly is arranged between the first insulating member and the second insulating member to connect the first insulating member and the second insulating member; the connecting assembly includes a first elastic connecting member and a second elastic connecting member, the first elastic connecting member is provided with a first opening and first connecting portions located at both ends of the first opening, each of the first connecting portions is respectively connected to the first insulating member and the second insulating member, the second elastic connecting member is provided with a second opening and second connecting portions located at both ends of the second opening, each of the second connecting portions is respectively connected to the first insulating member and the second insulating member; the first opening and the second opening are oriented in opposite directions.

[0009] The utility model is further configured as follows: the first opening and the second opening are arranged in directions along the width direction of the first insulating member and / or the second insulating member.

[0010] The utility model is further configured as follows: the first elastic connector includes a first horizontal section and a first inclined section located at both ends of the first horizontal section, the angle between the first inclined section and the first horizontal section is α, α≥90°; the second elastic connector includes a second horizontal section and a second inclined section located at both ends of the second horizontal section, the angle between the second inclined section and the second horizontal section is β, β≥90°; or, the first elastic connector and the second elastic connector are both V-shaped, W-shaped, U-shaped or arc-shaped.

[0011] The utility model is further configured as follows: the number of the first elastic connecting members is multiple, and the number of the second elastic connecting members is multiple.

[0012] The utility model is further configured as follows: each of the first elastic connectors is arranged on the same side of each of the second elastic connectors; each of the first elastic connectors is arranged along the width direction of the first insulating member and / or the second insulating member, and each of the second elastic connectors is arranged along the width direction of the first insulating member and / or the second insulating member.

[0013] The utility model is further configured as follows: the first opening is located at a side of the first elastic connecting member away from the second elastic connecting member, and the second opening is located at a side of the second elastic connecting member away from the first elastic connecting member.

[0014] The utility model is further configured as follows: each of the first connecting portion and the second connecting portion is extended along the length direction of the first insulating member and / or the second insulating member.

[0015] A battery top cover, characterized in that it includes a top cover sheet, the above-mentioned insulating member, a negative electrode assembly and a positive electrode assembly; the insulating member is located at the lower side of the top cover sheet, the negative electrode assembly is respectively connected to the top cover sheet and the first insulating member, and the positive electrode assembly is respectively connected to the top cover sheet and the second insulating member.

[0016] The utility model is further configured as follows: the top cover sheet is provided with a first mounting hole and a second mounting hole, the first insulating member is provided with a third mounting hole, the second insulating member is provided with a fourth mounting hole, the negative electrode assembly is mounted through the first mounting hole and the third mounting hole, and the positive electrode assembly is mounted through the second mounting hole and the fourth mounting hole; a fifth mounting hole is provided on the top cover sheet, an explosion-proof valve is arranged in the fifth mounting hole, a film is arranged above the fifth mounting hole to seal the fifth mounting hole, a mounting groove is arranged below the explosion-proof valve on the first insulating member or the second insulating member, and an exhaust hole is arranged on the bottom wall of the mounting groove; a first liquid injection hole is provided on the top cover sheet, and a second liquid injection hole is provided below the first liquid injection hole on the first insulating member or the second insulating member.

[0017] A battery, characterized in that it comprises a battery housing, an electric core and the above-mentioned battery top cover, the electric core is located in the battery housing, and the battery top cover is used for sealing the electric core in the battery housing.

[0018] By adopting the above technical solutions, 1. The first insulating member and the second insulating member are respectively connected to the positive electrode assembly and the negative electrode assembly, and during the thermal expansion and contraction of the first insulating member and the second insulating member, the deformation of the connecting assembly is used to prevent the first insulating member and the second insulating member from shifting at the positive electrode assembly and the negative electrode assembly, resulting in battery sealing failure. 2. The connecting assembly adopts the first elastic connecting piece and the second elastic connecting piece with opposite openings, so that the component force generated by the resetting force of the first elastic connecting piece in the front-back direction after deformation and the component force generated by the resetting force of the second elastic connecting piece in the front-back direction after deformation are opposite in direction, and the two have a certain offset effect, reducing or even eliminating the component force in the front-back direction, making the insulating member more stable and preventing the insulating member from shifting back and forth, resulting in misalignment installation. 3. Since the first elastic connecting piece is in the front and the first opening faces forward, the first connecting portion can be as close as possible to the front side of the first insulating member and the second insulating member. Since the second elastic connecting piece is in the back and the second opening faces backward, the second connecting portion can be as close as possible to the back side of the first insulating member and the second insulating member. Without the first elastic connecting piece and the second elastic connecting piece protruding forward or backward from the first insulating member and the second insulating member, end connection is realized, improving the connection stability. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is the part drawing of the first embodiment of the present utility model;

[0021] Figure 2 It is the top view of the first embodiment of the present utility model;

[0022] Figure 3 It is Figure 1 the partial enlarged view of;

[0023] Figure 4 It is Figure 2 the partial enlarged view of;

[0024] Figure 5 It is Figure 4 the enlarged view of A in;

[0025] Figure 6 It is Figure 4 the enlarged view of B in;

[0026] Figure 7 It is the partial structure schematic diagram of the second embodiment of the present utility model;

[0027] Figure 8 It is the partial structure schematic diagram of the third embodiment of the present utility model;

[0028] Figure 9 It is the assembly drawing of the fourth embodiment of the present utility model;

[0029] Figure 10 It is the cross-sectional view of the fourth embodiment of the present utility model;

[0030] Figure 11 It is the exploded view of the fourth embodiment of the present utility model.

[0031] Explanation of reference numerals:

[0032] 1. First insulating part;

[0033] 11. Third mounting hole;

[0034] 2. Second insulating part;

[0035] 21. Fourth mounting hole; 22. Mounting groove; 23. Exhaust hole; 24. Second liquid injection hole;

[0036] 3. Connection assembly;

[0037] 31. First elastic connection member; 32. Second elastic connection member;

[0038] 311. First opening; 312. First connection part; 313. First horizontal section; 314. First inclined section; 321. Second opening; 322. Second connection part; 323. Second horizontal section; 324. Second inclined section;

[0039] 4. Top cover piece;

[0040] 41. First mounting hole; 42. Second mounting hole; 43. Fifth mounting hole; 44. First liquid injection hole;

[0041] 5. Negative electrode assembly;

[0042] 51. Negative mounting base; 52. Negative electrode component; 53. First seal;

[0043] 6. Positive electrode assembly;

[0044] 61. Positive mounting base; 62. Positive electrode component; 63. Second seal;

[0045] 71. Explosion-proof valve; 72. Film. Specific embodiments

[0046] In order to enable those skilled in the art to better understand the present utility model and thus more clearly define the scope of protection required by the present utility model, the present utility model will be described in detail below with respect to certain specific embodiments of the present utility model. It should be noted that the following are only some specific embodiments of the concept of the present utility model, and only a part of the embodiments of the present utility model. The specific and direct descriptions of the relevant structures are only for the convenience of understanding the present utility model, and each specific feature does not of course and directly limit the scope of implementation of the present utility model. Conventional selections and substitutions made by those skilled in the art under the guidance of the concept of the present utility model shall be regarded as within the scope of protection required by the present utility model.

[0047] Embodiment 1:

[0048] As Figures 1-6 shown, the present utility model discloses an insulating member whose length direction is telescopic, including a first insulating member 1, a second insulating member 2 and a connecting component 3. The first insulating member 1 is on the left, the second insulating member 2 is on the right, and the connecting component 3 is arranged between the first insulating member 1 and the second insulating member 2 to connect the first insulating member 1 and the second insulating member 2, and the three are integrally formed.

[0049] Specifically, the connecting component 3 includes a first elastic connecting piece 31 and a second elastic connecting piece 32. The first elastic connecting piece 31 is in the front, and the second elastic connecting piece 32 is in the rear. The first elastic connecting piece 31 is provided with a first opening 311 facing forward and first connecting parts 312 located at the left and right ends of the first opening 311. The first connecting part 312 at the left end is integrally formed and connected to the first insulating piece 1, and the first connecting part 312 at the right end is integrally formed and connected to the second insulating piece 2 to connect the first insulating piece 1 and the second insulating piece 2 through the first elastic connecting piece 31. Correspondingly, the second elastic connecting piece 32 is provided with a second opening 321 facing backward and second connecting parts 322 located at the left and right ends of the second opening 321. The second connecting part 322 at the left end is integrally formed and connected to the first insulating piece 1, and the second connecting part 322 at the right end is integrally formed and connected to the second insulating piece 2 to connect the first insulating piece 1 and the second insulating piece 2 through the second elastic connecting piece 32.

[0050] Therefore, 1. The first insulating piece 1 and the second insulating piece 2 are respectively connected to the positive electrode assembly 6 and the negative electrode assembly 5. During the thermal expansion and contraction of the first insulating piece 1 and the second insulating piece 2, the deformation of the connecting component 3 is used to prevent the first insulating piece 1 and the second insulating piece 2 from shifting at the positive electrode assembly 6 and the negative electrode assembly 5, resulting in battery sealing failure. 2. The connecting component 3 uses the first elastic connecting piece 31 and the second elastic connecting piece 32 with opposite openings, so that the component force generated by the reset force of the first elastic connecting piece 31 in the front-rear direction after deformation and the component force generated by the reset force of the second elastic connecting piece 32 in the front-rear direction after deformation are in opposite directions. The two have a certain offset effect, reducing or even eliminating the component force in the front-rear direction, making the insulating piece more stable and preventing the insulating piece from shifting forward and backward, resulting in misalignment installation. 3. Since the first elastic connecting piece 31 is in the front and the first opening 311 faces forward, the first connecting part 312 can be as close as possible to the front side of the first insulating piece 1 and the second insulating piece 2. Since the second elastic connecting piece 32 is in the rear and the second opening 321 faces backward, the second connecting part 322 can be as close as possible to the rear side of the first insulating piece 1 and the second insulating piece 2. Without the need for the first elastic connecting piece 31 and the second elastic connecting piece 32 to protrude forward or backward from the first insulating piece 1 and the second insulating piece 2, end connection is achieved, improving the connection stability.

[0051] Among them, the insulating piece is integrally injection-molded from materials such as plastic, rubber, and silica gel.

[0052] Specifically, the first elastic connecting member 31 in this embodiment includes a first horizontal section 313 and first inclined sections 314 located at both ends of the first horizontal section 313. The first horizontal section 313 extends horizontally from left to right. One end of the first inclined section 314 is connected to the first horizontal section 313, and the other end faces forward and is close to the first insulating member 1 or the second insulating member 2. The length of the first inclined section 314 is 8-12 times that of the first horizontal section 313. Wherein, the included angle between the first inclined section 314 and the first horizontal section 313 is α, and α≥90°. Similarly, the second elastic connecting member 32 includes a second horizontal section 323 and second inclined sections 324 located at both ends of the second horizontal section 323. The second horizontal section 323 extends horizontally from left to right. One end of the second inclined section 324 is connected to the first horizontal section 313, and the other end faces backward and is close to the first insulating member 1 or the second insulating member 2. The length of the second inclined section 324 is 8-12 times that of the second horizontal section 323. Wherein, the included angle between the second inclined section 324 and the second horizontal section 323 is β, and β≥90°.

[0053] Therefore, the two first inclined sections 314 and second inclined sections 324 are spaced apart by a certain distance through the first horizontal section 313 and the second horizontal section 323, so as to ensure that when the first inclined section 314 and the second inclined section 324 are bent and deformed, α and β can be as close as possible to 90° to reduce the component forces in the front and rear directions, prevent the insulating members from deflecting forward and backward, and ensure the stability of the positioning and installation.

[0054] Specifically, in this embodiment, α = β = 94°.

[0055] In other embodiments, both the first elastic connecting member 31 and the second elastic connecting member 32 are V-shaped or W-shaped or U-shaped or arc-shaped.

[0056] Preferably, each of the first connecting portions 312 and the second connecting portions 322 in this embodiment extends horizontally from left to right, so that the front and rear component forces of the force transmitted by the first inclined section 314 to the first connecting portion 312 can be reduced or even offset by the front and rear deformation of the first connecting portion 312. Thus, the first connecting portion 312 only transmits the force in the left and right directions to the first insulating member 1 or the second insulating member 2, so that the front and rear component forces of the force transmitted by the second inclined section 324 to the second connecting portion 322 can be reduced or even offset by the front and rear deformation of the second connecting portion 322. Thus, the second connecting portion 322 only transmits the force in the left and right directions to the first insulating member 1 or the second insulating member 2, further reducing the front and rear component forces acting on the first insulating member 1 and the second insulating member 2, preventing the insulating members from deflecting forward and backward, and ensuring the stability of the positioning and installation.

[0057] Preferably, the number of the first elastic connectors 31 is multiple, and the number of the second elastic connectors 32 is multiple, so that the first insulating member 1 and the second insulating member 2 are connected at multiple positions in the front-rear direction through the multiple first elastic connectors 31 and the second elastic connectors 32, ensuring the connection stability.

[0058] Specifically, in this embodiment, the number of both the first elastic connectors 31 and the second elastic connectors 32 is 3.

[0059] Correspondingly, each first elastic connector 31 is arranged on the front side of each second elastic connector 32; and each first elastic connector 31 and each second elastic connector 32 are arranged in the front-rear direction. This makes the overall structure more orderly.

[0060] Embodiment Two:

[0061] As Figure 7 shown, the present utility model discloses an insulating member that is telescopic in the length direction. Its main structure is the same as that of Embodiment One, except that the first elastic connector 31 is located at the rear side of the second elastic connector 32, so that the first opening 311 and the second opening 321 are arranged oppositely.

[0062] Embodiment Three:

[0063] As Figure 8 shown, the present utility model discloses an insulating member that is telescopic in the length direction. Its main structure is the same as that of Embodiment One, except that the first elastic connector 31 and the second elastic connector 32 are arranged in an alternating or non-alternating manner in the front-rear direction.

[0064] Embodiment Four:

[0065] Combined with Figures 9-11 shown, the present utility model discloses a battery top cover, including a top cover sheet 4, the insulating member according to any one of Embodiments One to Three, a negative electrode assembly 5, and a positive electrode assembly 6; wherein, the insulating member is located under the top cover sheet 4, the negative electrode assembly 5 is located on the left side of the top cover sheet 4, and is respectively connected to the top cover sheet 4 and the first insulating member 1, and the positive electrode assembly 6 is located on the right side of the top cover sheet 4, and is respectively connected to the top cover sheet 4 and the second insulating member 2.

[0066] Among them, the top cover sheet 4 is provided with a square first mounting hole 41 and a second mounting hole 42, the first insulating member 1 is provided with a square third mounting hole 11, the second insulating member 2 is provided with a square fourth mounting hole 21, the negative electrode assembly 5 is installed through the first mounting hole 41 and the third mounting hole 11, and the positive electrode assembly 6 is installed through the second mounting hole 42 and the fourth mounting hole 21.

[0067] Specifically, the negative electrode assembly 5 includes a negative mounting base 51, a negative electrode member 52, and a first sealing member 53. The negative mounting base 51 is disposed above the first mounting hole 41 by means of snap connection, bonding, etc., and is partially embedded in the first mounting hole 41. The first sealing member 53 is sleeved on the negative electrode member 52, and the negative electrode member 52 passes upward through the third mounting hole 11 and the first mounting hole 41 from below the third mounting hole 11, and is snap-fitted with the negative mounting base 51 to complete the installation. In the installed state, the first sealing member 53 is clamped between the top cover sheet 4 and the negative electrode member 52, and the negative electrode member 52 presses the first insulating member 1 upward against the top cover sheet 4.

[0068] Similarly, the positive electrode assembly 6 includes a positive mounting base 61, a positive electrode member 62, and a second sealing member 63. The positive mounting base 61 is disposed above the second mounting hole 42 by means of snap connection, bonding, etc., and is partially embedded in the second mounting hole 42. The second sealing member 63 is sleeved on the positive electrode member 62, and the positive electrode member 62 passes upward through the fourth mounting hole 21 and the second mounting hole 42 from below the fourth mounting hole 21, and is snap-fitted with the positive mounting base 61 to complete the installation. In the installed state, the second sealing member 63 is clamped between the top cover sheet 4 and the positive electrode member 62, and the positive electrode member 62 presses the second insulating member 2 upward against the top cover sheet 4.

[0069] In addition, a fifth mounting hole 43 is formed in the middle of the top cover sheet 4 in this embodiment. An explosion-proof valve 71 is provided in the fifth mounting hole 43 by means of snap connection, bonding, etc. A film 72 is provided on the upper side of the fifth mounting hole 43 to close the fifth mounting hole 43. In addition, an installation groove 22 is provided in the second insulating member 2 below the explosion-proof valve 71, and an exhaust hole 23 is provided on the bottom wall of the installation groove 22; so that the explosion-proof valve 71 is communicated with the lower part of the insulating member through the exhaust hole 23 and the installation groove 22, so as to prevent the risk of battery explosion due to excessive internal pressure through the explosion-proof valve 71 in the battery assembly state, and the film 72 plays a protective role for the explosion-proof valve 71 to prevent the explosion-proof valve 71 from being contacted by the outside.

[0070] In addition, a first liquid injection hole 44 is provided on the top cover sheet 4 in this embodiment. A second liquid injection hole 24 is provided in the second insulating member 2 below the first liquid injection hole 44, so that in the battery assembly state, the electrolyte can be injected into the battery through the first liquid injection hole 44 and the second liquid injection hole 24.

[0071] Embodiment Five:

[0072] The present utility model discloses a battery, which includes a battery case, an electric core, and the battery top cover described in Embodiment Four. The electric core is located in the battery case, and the battery top cover is installed at the upper end of the battery case to seal the electric core in the battery case.

[0073] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An insulating member with a telescopic length, characterized in that: The invention comprises a first insulating member (1), a second insulating member (2) and a connecting assembly (3), wherein the connecting assembly (3) is arranged between the first insulating member (1) and the second insulating member (2) to connect the first insulating member (1) and the second insulating member (2); The connecting assembly (3) comprises a first elastic connecting member (31) and a second elastic connecting member (32); the first elastic connecting member (31) is provided with a first opening (311) and first connecting portions (312) located at both ends of the first opening (311); each of the first connecting portions (312) is respectively connected to the first insulating member (1) and the second insulating member (2); the second elastic connecting member (32) is provided with a second opening (321) and second connecting portions (322) located at both ends of the second opening (321); each of the second connecting portions (322) is respectively connected to the first insulating member (1) and the second insulating member (2); The first opening (311) and the second opening (321) are oriented in opposite directions.

2. The lengthwise telescopic insulating member according to claim 1, wherein: The first opening (311) and the second opening (321) are oriented along the width direction of the first insulating member (1) and / or the second insulating member (2).

3. The length-directionally telescopic insulating member according to claim 1, characterized in that: The first elastic connecting member (31) comprises a first horizontal section (313) and first inclined sections (314) located at two ends of the first horizontal section (313), the angle between the first inclined section (314) and the first horizontal section (313) is α, α≥90°, the second elastic connecting member (32) comprises a second horizontal section (323) and second inclined sections (324) located at two ends of the second horizontal section (323), the angle between the second inclined section (324) and the second horizontal section (323) is β, β≥90°; or, The first elastic connecting member (31) and the second elastic connecting member (32) are both V-shaped, W-shaped or U-shaped.

4. The lengthwise telescopic insulating member according to any one of claims 1-3, characterized in that: The number of the first elastic connecting members (31) is multiple, and the number of the second elastic connecting members (32) is multiple.

5. The lengthwise telescopic insulating member according to claim 4, characterized in that: Each of the first elastic connecting members (31) is arranged on the same side of each of the second elastic connecting members (32); Each of the first elastic connecting members (31) is arranged along the width direction of the first insulating member (1) and / or the second insulating member (2), and each of the second elastic connecting members (32) is arranged along the width direction of the first insulating member (1) and / or the second insulating member (2).

6. The length-direction telescopable insulating member according to claim 5, characterized in that: The first opening (311) is located on a side of the first elastic connecting member (31) facing away from the second elastic connecting member (32), and the second opening (321) is located on a side of the second elastic connecting member (32) facing away from the first elastic connecting member (31).

7. The lengthwise telescopic insulating member according to any one of claims 1-3, characterized in that: Each of the first connecting portion (312) and the second connecting portion (322) is arranged to extend along the length direction of the first insulating member (1) and / or the second insulating member (2).

8. A battery top cover, characterized in that: It comprises a top cover sheet (4), an insulating member as claimed in any one of claims 1 to 7, a negative electrode assembly (5) and a positive electrode assembly (6); The insulating member is located below the top cover sheet (4). The negative electrode assembly (5) is respectively connected to the top cover sheet (4) and the first insulating member (1), and the positive electrode assembly (6) is respectively connected to the top cover sheet (4) and the second insulating member (2).

9. The battery top cover according to claim 8, characterized in that: The top cover sheet (4) is provided with a first mounting hole (41) and a second mounting hole (42). The first insulating member (1) is provided with a third mounting hole (11), and the second insulating member (2) is provided with a fourth mounting hole (21). The negative electrode assembly (5) is mounted through the first mounting hole (41) and the third mounting hole (11), and the positive electrode assembly (6) is mounted through the second mounting hole (42) and the fourth mounting hole (21); The top cover sheet (4) is provided with a fifth mounting hole (43). An explosion-proof valve (71) is arranged in the fifth mounting hole (43). A film (72) is arranged above the fifth mounting hole (43) to seal the fifth mounting hole (43). An installation groove (22) is arranged below the explosion-proof valve (71) on the first insulating member (1) or the second insulating member (2), and an exhaust hole (23) is arranged on the bottom wall of the installation groove (22); The top cover sheet (4) is provided with a first liquid injection hole (44). A second liquid injection hole (24) is arranged below the first liquid injection hole (44) on the first insulating member (1) or the second insulating member (2).

10. A battery, characterized in that: It includes a battery case, a battery cell and the battery top cover according to any one of claims 8-9. The battery cell is located in the battery case, and the battery top cover is used to seal the battery cell in the battery case.

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