Battery and electric device

Abstract

The utility model relates to a battery and an electric device. The battery comprises a shell, a first top cover assembly, a second top cover assembly, a battery cell, a first baffle plate and a second baffle plate, the shell is provided with a first side plate and a second side plate which are oppositely arranged in a first direction, and a first opening and a second opening which are oppositely arranged in a second direction, and the second direction is perpendicular to the first direction; the first top cover assembly seals the first opening of the shell, and the second top cover assembly seals the second opening of the shell; according to the utility model, the first baffle covers the weld joint of the shell and is used for retarding flame and enhancing the structural strength, so that the cell is prevented from being torn from the weld joint when generating gas and bulging, the safety performance of the battery is improved, and the service life of the battery is prolonged; the second baffle is arranged to form an airflow channel, the problem of gas production caused by chemical reaction and electrolyte decomposition at the end of circulation is solved by arranging a reasonable airflow path, and explosion caused by overhigh air pressure or thermal runaway in the battery shell is avoided by exhausting.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery and an electrical device. Background Art

[0002] Lithium-ion batteries are widely used in electric vehicles and 3C products due to their high energy density, no memory effect, long cycle life and environmental friendliness.

[0003] At present, the Chinese patent number is 2021208650997, the application date is April 25, 2021, and the name of the invention is: A shell structure of a rectangular lithium battery. The application discloses a shell structure of a rectangular lithium battery, including an upper shell, a lower shell, a positive cover plate, a negative cover plate and a baffle; the upper shell and the lower shell are abutted to form a rectangular shell with a accommodating cavity; the area where the upper shell and the lower shell are abutted is the weld; one end of the rectangular shell is connected to the positive cover plate, and the other end is connected to the negative cover plate; one end of the baffle is arranged on the positive cover plate, and the other end is arranged on the negative cover plate after passing through the accommodating cavity; the side of the baffle is abutted against the weld. Although the application designed a baffle for the weld, it did not consider the problem of how to quickly discharge the gas inside the battery when the battery cell is thermally runaway. Utility Model Content

[0004] To this end, the technical problem to be solved by the utility model is to overcome the technical difficulties in the prior art that gas production increases when the battery is in thermal runaway and the side welds are prone to rupture, and to provide a battery and an electrical device that reserves space for gas production during the reaction process and reduces safety hazards such as thermal runaway.

[0005] In the first aspect, in order to solve the above technical problems, the utility model provides a battery, which includes:

[0006] A housing, the housing having a first side plate and a second side plate arranged opposite to each other in a first direction and a first opening and a second opening arranged opposite to each other in a second direction, wherein the second direction and the first direction are perpendicular to each other;

[0007] a first top cover assembly, the first top cover assembly closing the first opening of the housing, the first top cover assembly having a first insulating member;

[0008] a second top cover assembly, the second top cover assembly closing the second opening of the housing, the second top cover assembly having a second insulating member;

[0009] A battery cell, the battery cell being accommodated in the shell, the battery cell having a first end face arranged facing the first top cover assembly and a second end face arranged facing the second top cover assembly; a first tab bending space is formed between the first end face of the battery cell and the first insulating member; a second tab bending space is formed between the second end face of the battery cell and the second insulating member;

[0010] A first baffle, the first baffle is limited between the first side plate and the battery core; two ends of the first baffle in the second direction are respectively connected to the second insulating member and the first insulating member; two ends of the first baffle in the third direction are both against the shell, wherein the third direction and the second direction are perpendicular to each other;

[0011] A second baffle, the second baffle is limited between the second side plate and the battery cell; the two ends of the second baffle in the second direction are respectively connected to the second insulating member and the first insulating member; an air flow channel is formed between at least one end of the second baffle in the third direction and the inner wall of the shell, and the air flow channel connects the first pole ear bending space and the second pole ear bending space.

[0012] In one embodiment of the utility model, the first side plate is provided with a weld, one side surface of the first baffle in the first direction is against the first side plate, and the first baffle covers the weld on the first side plate, and the other side surface of the first baffle in the first direction is against the battery cell.

[0013] In an embodiment of the present invention, the materials of the first baffle plate and the second baffle plate are both set to be flame retardant materials, and the flame retardant materials are set to be mica, silicon dioxide or flame retardant ceramics.

[0014] In one embodiment of the present invention, the air flow channel is formed between the second baffle at both ends in the third direction and the inner wall of the shell.

[0015] In one embodiment of the utility model, the first insulating member includes a first insulating plate, and the first pole ear bending space is formed between the first insulating plate and the first end surface of the battery cell; the first abutting portion and the second abutting portion are respectively connected to the two ends of the first direction of the first insulating plate; the first abutting portion and the second abutting portion are both abutted against the first end surface of the battery cell; the first abutting portion and the first baffle are connected by an integral molding manner; the second abutting portion and the second baffle are connected by an integral molding manner.

[0016] In one embodiment of the utility model, the second insulating member includes a second insulating plate, and the second pole ear bending space is formed between the second insulating plate and the second end face of the battery cell; the second insulating plate is respectively connected to a third abutting portion and a fourth abutting portion at both ends in the first direction; the third abutting portion and the fourth abutting portion are both abutted against the second end face of the battery cell; the third abutting portion and the first baffle are connected by plugging; the fourth abutting portion and the second baffle are connected by plugging.

[0017] In an embodiment of the present invention, the width of the second abutting portion in the third direction and the width of the fourth abutting portion in the third direction are both equal to the width of the second baffle in the third direction.

[0018] In one embodiment of the utility model, one end of the first baffle plate arranged close to the second insulating member is a first insertion end, and the first insertion end is inserted between the third abutting portion and the first side plate of the shell, wherein the first insertion end is provided with a first inclined surface, and the third abutting portion is provided with a second inclined surface matching the first inclined surface; one end of the second baffle plate arranged close to the second insulating member is a second insertion end, and the second insertion end is inserted between the fourth abutting portion and the second baffle plate of the shell, wherein the second insertion end is provided with a third inclined surface, and the fourth abutting portion is provided with a fourth inclined surface matching the third inclined surface.

[0019] In one embodiment of the present invention, the first top cover assembly has a first top cover, the first top cover is provided with a first explosion-proof hole, the first insulating member has a first air hole, and the first explosion-proof hole is connected to the first pole ear bending space through the first air hole; and / or, the second top cover assembly has a second top cover, the second top cover is provided with a second explosion-proof hole, the second insulating member has a second air hole, and the second explosion-proof hole is connected to the second pole ear bending space through the second air hole.

[0020] In a second aspect, the utility model further provides an electrical device, which comprises the battery in any one of the above embodiments.

[0021] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0022] The battery and the electrical device of the utility model are provided with a first baffle covering the weld of the shell for flame retardancy and enhancing structural strength, so as to prevent the battery core from being torn from the weld when it produces gas and swells, thereby improving the safety performance and service life of the battery;

[0023] The utility model also arranges a second baffle plate on the opposite side of the first baffle plate, and is spliced ​​with the shell to form a reserved airflow channel. By setting a reasonable airflow path, the gas production problem caused by chemical reaction and electrolyte decomposition at the end of the cycle is solved, and the explosion caused by excessive air pressure or thermal runaway in the battery shell is avoided by exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic cross-sectional view of the interior of a battery in a preferred embodiment of the utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the relative position of the middle shell and the battery body;

[0027] Figure 3 for Figure 1 A schematic diagram of the structure of the first top cover assembly, the first baffle plate and the second baffle plate;

[0028] Figure 4 This is an axonometric schematic diagram of the first insulating plate, the first baffle plate and the second baffle plate in the preferred embodiment of the utility model;

[0029] Figure 5 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0030] Figure 6 for Figure 1 A magnified schematic diagram of point B in the middle.

[0031] Explanation of the markings in the specification: 1. Shell; 11. First side plate; 12. Second side plate; 13. First opening; 14. Second opening; 15. First pole ear bending space; 16. Second pole ear bending space; 2. First top cover assembly; 21. First insulating member; 2101. First insulating plate; 22. First top cover; 3. Second top cover assembly; 31. Second insulating member; 32. Second top cover; 4. Battery cell; 41. First end face; 42. Second end face; 5. First baffle plate; 51. First abutting portion; 6. Second baffle plate; 61. Second abutting portion; 71. First inclined surface; 72. Second inclined surface; 73. Third inclined surface; 74. Fourth inclined surface; 8. Pole ear; 9. Pole column. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0033] Embodiment 1

[0034] Reference Figure 1 to Figure 6 As shown, the first embodiment of the utility model provides a battery, which includes a shell 1 and a battery cell 4 arranged inside the shell 1; as the number of cycles of the battery cell increases, the decomposition of the electrolyte and the intensified chemical reaction lead to increased gas production inside the shell 1 and increased temperature rise of the battery cell; the battery of the utility model is provided with a baffle abutting against the weld of the shell 1, and at the same time reserves space for gas production, thereby solving the exhaust problem and improving the safety performance of the battery.

[0035] Specifically, refer to Figure 1 and Figure 2 As shown, the shell 1 has a first side plate 11 and a second side plate 12 arranged opposite to each other in a first direction, and a first opening 13 and a second opening 14 arranged opposite to each other in a second direction, and the second direction and the first direction are perpendicular to each other; the battery also includes a first top cover assembly 2 and a second top cover assembly 3, the first top cover assembly 2 and the second top cover assembly 3 are respectively located at the two ends of the shell 1 in the second direction, the first top cover assembly 2 closes the first opening 13 of the shell 1 and has a first insulating member 21, and the second top cover assembly 3 closes the second opening 14 of the shell 1 and has a second insulating member 31.

[0036] Continue, refer to Figure 1 and Figure 2 As shown, the battery cell 4 is accommodated in the shell 1, and the battery cell 4 has a first end face 41 arranged facing the first top cover assembly 2, the first end face 41 extends out of the pole ear 8 and is electrically connected to the pole 9 fixed to the first top cover assembly 2, and a first pole ear bending space 15 is formed between the first end face 41 of the battery cell 4 and the first insulating member 21; the battery cell 4 also includes a second end face 42 arranged facing the second top cover assembly 3, the second end face 42 is located on the opposite side of the first end face 41 in the second direction, the second end face 42 extends out of the pole ear 8, and the polarity is opposite to the pole ear 8 of the first end face 41, the pole ear 8 of the second end face 42 is electrically connected to the pole 9 fixed to the second top cover assembly 3, and a second pole ear bending space 16 is formed between the second end face 42 of the battery cell 4 and the second insulating member 31.

[0037] Specifically, in a preferred embodiment of the utility model, the appearance of the battery cell 4 is set to a rectangular structure, and the battery cell 4 includes the first end face 41, the second end face 42, and four battery cell side faces in the second direction for connecting the first end face 41 and the second end face 42, and the four battery cell side faces are relatively arranged small side faces with smaller areas, and relatively arranged large side faces with larger areas, wherein a pair of small side faces with smaller areas are relatively arranged in the first direction; the shell 1 is sleeved on the outside of the battery cell 4, and the first side panel 11 and the second side panel 12 are respectively arranged opposite to the small side faces with smaller areas of the battery cell 4.

[0038] It should be noted that when the shell 1 is processed by side welding, the first side panel 11 is provided with a weld. The structural strength of the area where the weld is located is relatively weak. If the battery cell 4 cannot exhaust gas when generating gas, it will bulge at the weld. In the event of thermal runaway, it is also very easy to crack at the weld, causing the contents to splash.

[0039] Reference Figure 1 , Figure 3 and Figure 4 As shown, the battery also includes a first baffle 5, which is limited between the first side plate 11 and the battery cell 4; the first baffle 5 extends along the second direction, and the two ends of the first baffle 5 in the second direction are respectively connected to the second insulating member 31 and the first insulating member 21.

[0040] Next, in some embodiments, one side surface of the first baffle 5 in the first direction abuts against the first side plate 11, and the other side surface of the first baffle 5 in the first direction abuts against the battery cell 4; the side surface of the first baffle 5 abutting against the first side plate 11 can cover the weld on the first side plate 11, to avoid cracking from the weld when gas is generated and swollen inside the battery, and further to avoid the pole piece and the like from flying out of the weld of the shell 1, thereby improving the structural strength of the weld area; at the same time, the first baffle 5 is limited and fixed by the first side plate 11 and the battery cell 4 in the first direction, is not easy to deviate or slide, has good stability and can always cover the weld during the battery cycle.

[0041] Next, in some embodiments, both ends of the first baffle 5 in the third direction are against the shell 1, and the third direction is perpendicular to the plane where the second direction and the first direction are located; at this time, the first baffle 5 completely fills the gap between the first side plate 11 and the side of the battery cell 4, and fully covers the area where the weld is located. Even if the battery is hit or vibrated during transportation and use, the first baffle 5 is limited to the gap in three-dimensional directions, which can effectively prevent the weld from being squeezed, broken or opened by internal force when the battery cell is thermally runaway.

[0042] Next, in some embodiments, the first baffle 5 is set to a flame retardant material, and the flame retardant material is set to mica, silica or fire-retardant ceramics. In other embodiments, the flame retardant material can also be set according to actual needs; the first baffle 5 has good physical properties, and has the characteristics of high temperature resistance, pressure resistance and impact resistance. It can avoid thermal runaway and heat diffusion at the weld, reduce the intensity of combustion and reduce the range of combustion.

[0043] Specifically, refer to Figure 1 , Figure 3 and Figure 4 As shown, in a preferred embodiment of the utility model, the battery further comprises a second baffle 6, which is limited between the second side plate 12 and the battery cell 4; the second baffle 6 extends along the second direction, and the two ends of the second baffle 6 in the second direction are respectively connected to the second insulating member 31 and the first insulating member 21. An airflow channel is formed between at least one end of the second baffle 6 in the third direction and the inner wall of the shell 1; in some embodiments, the airflow channel is formed between both ends of the second baffle 6 in the third direction and the inner wall of the shell 1; the airflow channel connects the first tab bending space 15 and the second tab bending space 16, and the first tab bending space 15 and the second tab bending space 16 can provide accommodation space for the tabs extending from the first end face 41 and the second end face 42, and can also connect the airflow channel to provide more exhaust space for depressurizing the inside of the shell 1. The airflow channel can be connected to the first top cover assembly 2 through the first tab bending space 15 for exhaust, and / or the airflow channel can be connected to the second top cover assembly 3 through the second tab bending space 16 for exhaust.

[0044] Next, in some embodiments, the first top cover assembly 2 has a first top cover 22, the first top cover 22 is arranged closely against the first insulating member 21 and is located on a side surface of the first insulating member 21 away from the first pole ear bending space 15; the first top cover 22 is provided with a first explosion-proof hole, the first insulating member 21 has a first air hole, the first air hole penetrates the first insulating member 21 and is connected to the first explosion-proof hole, the first explosion-proof hole is connected to the first pole ear bending space 15 through the first air hole, and the excess gas generated during the battery cell cycle can be discharged to the first pole ear bending space 15 through the air flow channel, and exhausted through the first air hole and the first explosion-proof hole in turn, so as to avoid explosion caused by excessive air pressure inside the shell 1.

[0045] Next, in some embodiments, the second top cover assembly 3 has a second top cover 32, the second top cover 32 is arranged closely against the second insulating member 31, and is located on the side surface of the second insulating member 31 away from the second pole ear bending space 16; the second top cover 32 is provided with a second explosion-proof hole, the second insulating member 31 has a second air hole, and the second explosion-proof hole is connected to the second pole ear bending space 16 through the second air hole; the excess gas generated during the battery cell cycle can be discharged to the second pole ear bending space 16 through the air flow channel, and exhausted through the second air hole and the second explosion-proof hole in turn, so as to avoid the internal air pressure of the shell 1 from being too high and causing an explosion.

[0046] Specifically, refer to Figure 1 As shown, the first insulating member 21 is configured as a plastic member close to the first top cover 22, and the first insulating member 21 includes a first insulating plate 2101, and the first insulating plate 2101 is arranged opposite to the first end face 41 of the battery cell 4, and the gap between the first insulating plate 2101 and the first end face 41 forms the first pole ear bending space 15. In some embodiments, the extension length of the first insulating plate 2101 in the first direction is less than that of the first top cover 22, and can avoid the welding position of the first top cover 22 on both sides with the shell 1, and the first abutting portion 51 and the second abutting portion 61 are respectively connected at both ends of the first direction of the first insulating plate 2101, and the first abutting portion 51 and the second abutting portion 61 are both abutted against the first end face 41 of the battery cell 4, and the first abutting portion 51 and the second abutting portion 61 are supported between the first insulating plate 2101 and the first end face 41.

[0047] Next, the second insulating member 31 includes a second insulating plate, the second insulating plate is arranged opposite to the second end face 42, and the second pole ear bending space 16 is formed between the second insulating plate and the second end face 42 of the battery cell 4. In some embodiments, the extension length of the second insulating plate in the first direction is less than that of the second top cover 32, so as to avoid the welding position between the two sides of the second top cover 32 and the housing 1, and the two ends of the second insulating plate in the first direction are respectively connected with a third abutting portion and a fourth abutting portion; the third abutting portion and the fourth abutting portion are both abutted against the second end face 42 of the battery cell 4, and the third abutting portion and the fourth abutting portion are supported in the second pole ear bending space 16 in the second direction.

[0048] Preferably, the first abutment portion 51 and the first baffle 5 are connected by an integral molding; the second abutment portion 61 and the second baffle 6 are connected by an integral molding; the third abutment portion and the first baffle 5 are connected by plugging; the fourth abutment portion and the second baffle 6 are connected by plugging; the integral molding setting can simplify the battery assembly, better abut and fix the position of the battery cell 4 inside the housing 1, and avoid the risk of explosion caused by the increased shaking inside the battery. The second baffle 6 is preferably set to a flame retardant material consistent with the first baffle 5, for controlling temperature rise and flame retardancy.

[0049] Next, in some embodiments, reference is made to Figure 5 and Figure 6 As shown, one end of the first baffle plate 5 arranged close to the second insulating member 31 is a first insertion end, and the first insertion end is inserted between the third abutting portion and the first side plate 11 of the shell 1, wherein the first insertion end is provided with a first inclined surface 71, and the third abutting portion is provided with a second inclined surface 72 matching with the first inclined surface 71; one end of the second baffle plate 6 arranged close to the second insulating member 31 is a second insertion end, and the second insertion end is inserted between the fourth abutting portion and the second baffle plate 6 of the shell 1, wherein the second insertion end is provided with a third inclined surface 73, and the fourth abutting portion is provided with a fourth inclined surface 74 matching with the third inclined surface 73; in other embodiments, the first baffle plate 5 and the second baffle plate 6 and the second insulating member 31 can be set to other structures that can be plugged in and out, but are not limited to this.

[0050] It should be noted that the width of the second abutment portion 61 in the third direction and the width of the fourth abutment portion in the third direction are both equal to the width of the second baffle 6 in the third direction; on the one hand, it is convenient for the assembly of the first top cover assembly 2 and the second top cover assembly 3, and on the other hand, the radial width of the flow path of the airflow channel flowing to the first pole ear bending space 15 and the second pole ear bending space 16 is kept consistent, thereby avoiding the change of the radial width of the flow path during exhaust that affects the exhaust efficiency or causes blockage and causes battery swelling.

[0051] Embodiment 2

[0052] The second embodiment of the utility model also provides an electric device, which includes the battery described in the first embodiment; a first baffle 5 is provided inside the battery to cover the battery shell weld, and a second baffle 6 is provided to reserve an airflow channel and connect the top cover assembly to form an exhaust passage inside the battery, providing an exhaust space for the gas generated by the cycle reaction, so as to avoid the battery internal pressure being too high or the temperature rising aggravated and the weld rupture causing an explosion. The battery has better safety performance and the service life of the electric device is longer.

[0053] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A battery, characterized in that: include, A shell (1), the shell (1) comprising a first side plate (11) and a second side plate (12) arranged opposite to each other in a first direction, and a first opening (13) and a second opening (14) arranged opposite to each other in a second direction, wherein the second direction and the first direction are perpendicular to each other; A first top cover assembly (2), the first top cover assembly (2) closing a first opening (13) of the housing (1), the first top cover assembly (2) having a first insulating member (21); A second top cover assembly (3), the second top cover assembly (3) closing a second opening (14) of the housing (1), the second top cover assembly (3) having a second insulating member (31); A battery cell (4), the battery cell (4) being accommodated in the shell (1), the battery cell (4) having a first end surface (41) arranged facing the first top cover assembly (2) and a second end surface (42) arranged facing the second top cover assembly (3); a first pole ear bending space (15) is formed between the first end surface (41) of the battery cell (4) and the first insulating member (21); and a second pole ear bending space (16) is formed between the second end surface (42) of the battery cell (4) and the second insulating member (31); A first baffle (5), the first baffle (5) being limited between the first side plate (11) and the battery core (4); two ends of the first baffle (5) in the second direction are respectively connected to the second insulating member (31) and the first insulating member (21); two ends of the first baffle (5) in the third direction are both against the housing (1), wherein the third direction and the second direction are perpendicular to each other; A second baffle (6), wherein the second baffle (6) is limited between the second side plate (12) and the battery cell (4); two ends of the second baffle (6) in the second direction are respectively connected to the second insulating member (31) and the first insulating member (21); an air flow channel is formed between at least one end of the second baffle (6) in the third direction and the inner wall of the shell (1), and the air flow channel is connected to the first pole ear bending space (15) and the second pole ear bending space (16).

2. The battery according to claim 1, characterized in that: The first side plate (11) is provided with a weld, one side surface of the first baffle plate (5) in the first direction abuts against the first side plate (11), and the first baffle plate (5) covers the weld on the first side plate (11), and the other side surface of the first baffle plate (5) in the first direction abuts against the battery cell (4).

3. The battery according to claim 1, characterized in that: The material of the first baffle (5) and the second baffle (6) are both set to be flame retardant material, and the flame retardant material is set to be mica, silicon dioxide or flame retardant ceramic.

4. The battery according to claim 1, characterized in that: The second baffle (6) forms the air flow channel between the inner wall of the housing (1) at both ends in the third direction.

5. The battery according to claim 1, characterized in that: The first insulating member (21) comprises a first insulating plate (2101); the first pole ear bending space (15) is formed between the first insulating plate (2101) and the first end surface (41) of the battery cell (4); the first abutment portion (51) and the second abutment portion (61) are respectively connected at two ends in the first direction of the first insulating plate (2101); the first abutment portion (51) and the second abutment portion (61) are both abutted against the first end surface (41) of the battery cell (4); the first abutment portion (51) and the first baffle plate (5) are connected by an integral molding method; the second abutment portion (61) and the second baffle plate (6) are connected by an integral molding method.

6. The battery according to claim 5, characterized in that: The second insulating member (31) comprises a second insulating plate, and the second pole ear bending space (16) is formed between the second insulating plate and the second end face (42) of the battery cell (4); the second insulating plate is connected to a third abutting portion and a fourth abutting portion at two ends in the first direction, respectively; the third abutting portion and the fourth abutting portion are both abutted against the second end face (42) of the battery cell (4); the third abutting portion and the first baffle (5) are connected by plugging; and the fourth abutting portion and the second baffle (6) are connected by plugging.

7. The battery according to claim 6, characterized in that: The width of the second abutting portion (61) in the third direction and the width of the fourth abutting portion in the third direction are both equal to the width of the second baffle (6) in the third direction.

8. The battery according to claim 6, characterized in that: One end of the first baffle (5) disposed close to the second insulating member (31) is a first insertion end, and the first insertion end is inserted between the third abutting portion and the first side plate (11) of the shell (1), wherein the first insertion end is provided with a first inclined surface (71), and the third abutting portion is provided with a second inclined surface (72) matched with the first inclined surface (71); one end of the second baffle (6) disposed close to the second insulating member (31) is a second insertion end, and the second insertion end is inserted between the fourth abutting portion and the second baffle (6) of the shell (1), wherein the second insertion end is provided with a third inclined surface (73), and the fourth abutting portion is provided with a fourth inclined surface (74) matched with the third inclined surface (73).

9. The battery according to claim 1, characterized in that: The first top cover assembly (2) has a first top cover (22), the first top cover (22) is provided with a first explosion-proof hole, the first insulating member (21) has a first air vent, the first explosion-proof hole is connected to the first pole lug bending space (15) through the first air vent; and / or the second top cover assembly (3) has a second top cover (32), the second top cover (32) is provided with a second explosion-proof hole, the second insulating member (31) has a second air vent, the second explosion-proof hole is connected to the second pole lug bending space (16) through the second air vent.

10. An electrical device, characterized in that: A battery comprising any one of claims 1 to 9.

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