Cover plate and battery

Abstract

The utility model discloses a cover plate and a battery, the cover plate comprises a first metal body, the first metal body is provided with a first through hole, and the first through hole is provided with two openings which are oppositely arranged; the first non-metal part is arranged in the first through hole, and the edge of the first non-metal part is connected to the hole wall of the first through hole in a surrounding mode. The cover plate provided by the utility model can have better flatness.

Description

Technical Field

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

[0002] In related art, a battery includes a housing, a cover plate, and battery cells. The housing has a storage cavity, in which the battery cells are placed, and the cover plate seals the opening of the storage cavity. The cover plate seals the opening of the storage cavity in the following manner: The cover plate is welded to the housing, thereby sealing the opening of the storage cavity. However, since the cover plate itself is typically thin, welding the housing and cover plate together results in poor flatness of the cover plate. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a cover plate that has good flatness.

[0004] The utility model also provides a battery.

[0005] The cover plate according to the first embodiment of the present invention includes:

[0006] a first metal body, wherein the first metal body is provided with a first through hole, and the first through hole has two openings arranged opposite to each other;

[0007] A first non-metallic member is disposed in the first through hole, and an edge of the first non-metallic member surrounds and is connected to a hole wall of the first through hole.

[0008] The cover plate according to the embodiment of the present invention has at least the following beneficial effects: In the prior art, the cover plate is entirely made of metal, so the stress generated during welding can lead to poor flatness of the cover plate. In the present application, by providing a first through-hole in the first metal body and placing the first non-metallic member in the first through-hole, the cover plate can be divided into regions. Compared with the cover plate in the prior art, the area of ​​the first metal body of the cover plate in the present application is smaller, so that the stress generated during welding of the cover plate is dispersed, which can effectively improve the flatness of the cover plate. Specifically, the cover plate can have good flatness.

[0009] According to some embodiments of the cover plate of the present invention, the first metal body includes a first main body portion and a first protruding portion, the first protruding portion is connected to the first main body portion, and the first protruding portion protrudes relative to the first main body portion, the first protruding portion is provided with the first through hole, the first main body portion is provided with the second through hole, and the first through hole and the second through hole are connected; the first non-metallic part is connected to the hole wall of the first through hole.

[0010] According to some embodiments of the cover plate of the present invention, the first metal body includes a first body portion and a first protrusion, the first protrusion is connected to the first body portion, and the first protrusion protrudes relative to the first body portion, the first protrusion is provided with the first through hole, the first body portion is provided with a second through hole, and the first through hole and the second through hole are connected; the first non-metallic part includes a second body portion and a second protrusion, the second protrusion is connected to the second body portion, and the second protrusion protrudes relative to the second body portion, the second body portion is provided in the first through hole, and the second protrusion is provided in the second through hole.

[0011] According to the cover plate of some embodiments of the present invention, the first non-metallic member is bonded to the hole wall of the first through hole.

[0012] According to the cover plate of some embodiments of the present invention, the density of the first metal body is greater than the density of the first non-metallic part.

[0013] A battery according to an embodiment of the second aspect of the present invention includes:

[0014] a housing having a storage cavity;

[0015] The cover plate described in any one of the embodiments of the first aspect is connected to the shell to close the opening of the storage cavity.

[0016] The battery according to the embodiment of the present invention has at least the following beneficial effects: In the prior art, the cover plate is made of metal as a whole, so the stress generated by welding during welding will cause the flatness of the cover plate to be poor. In the present application, by providing a first through hole on the first metal body and providing the first non-metallic part in the first through hole, the cover plate can be divided into regions. Compared with the cover plate in the prior art, the area of ​​the first metal body of the cover plate in the present application is smaller, so that when the cover plate is welded, the stress generated by welding will be dispersed, which can effectively make the flatness of the cover plate better. Specifically, the cover plate can have good flatness. Furthermore, the yield rate of the battery with the cover plate is higher.

[0017] According to some embodiments of the battery of the present invention, the shell includes a second metal body and a second non-metallic part, and the second metal body is provided with a third through hole; the second non-metallic part is arranged in the third through hole, and the edge of the second non-metallic part surrounds and is connected to the hole wall of the third through hole.

[0018] According to some embodiments of the battery of the present invention, the second metal body includes a third main body portion and a third protruding portion, the third protruding portion is connected to the third main body portion, and the third protruding portion protrudes relative to the third main body portion, the third protruding portion is provided with the third through hole, the third main body portion is provided with a fourth through hole, and the third through hole and the fourth through hole are connected; the second non-metallic part is connected to the hole wall of the third through hole.

[0019] According to some embodiments of the battery of the present invention, the second metal body includes a third body portion and a third protrusion portion, the third protrusion portion is connected to the third body portion and protrudes relative to the third body portion, the third protrusion portion is provided with the third through hole, the third body portion is provided with a fourth through hole, and the third through hole and the fourth through hole are connected; the second non-metallic part includes a fourth body portion and a fourth protrusion portion, the fourth protrusion portion is connected to the fourth body portion and protrudes relative to the fourth body portion, the fourth body portion is provided in the third through hole, and the fourth protrusion portion is provided in the fourth through hole.

[0020] In the battery according to some embodiments of the present invention, the second non-metallic member is bonded to the hole wall of the third through hole.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 Schematic diagram of the cover plate of some embodiments of the present invention;

[0024] Figure 2 This is a schematic diagram of the first metal body in the cover plate of the first embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the first metal body in the cover plate of the second embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the first metal body in the cover plate of the third embodiment of the present invention;

[0027] Figure 5 Schematic diagram of the first metal body in the cover plate of the fourth embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the first metal body in the cover plate of the fifth embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the first metal body in the cover plate of the sixth embodiment of the present invention;

[0030] Figure 8 This is a schematic cross-sectional view of a cover plate according to a first embodiment of the present invention;

[0031] Figure 9 This is a schematic cross-sectional view of a cover plate according to a second embodiment of the present invention;

[0032] Figure 10 Schematic diagram of batteries according to some embodiments of the present invention;

[0033] Figure 11 Schematic diagram of a battery housing in some embodiments of the present invention;

[0034] Figure 12 A schematic cross-sectional view of a battery housing according to a first embodiment of the present invention;

[0035] Figure 13 This is a schematic cross-sectional view of a battery casing according to a second embodiment of the present invention.

[0036] Reference numerals:

[0037] Battery 10, cover 100, first metal body 200, first protrusion 210, first through hole 220, first body part 230, second through hole 240, first non-metallic part 300, second body part 310, second protrusion 320, shell 400, second metal body 500, third protrusion 510, third through hole 520, third body part 530, fourth through hole 540, second non-metallic part 600, fourth body part 610, fourth protrusion 620. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0040] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0042] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0043] In the related art, the battery 10 includes a shell 400, a cover plate 100 and a battery cell. The shell 400 has a storage cavity, the battery cell is placed in the storage cavity, and the cover plate 100 closes the opening of the storage cavity. The way in which the cover plate 100 closes the opening of the storage cavity is specifically. The cover plate 100 is welded to the shell 400, so that the cover plate 100 closes the opening of the storage cavity. Among them, since the thickness of the cover plate 100 itself is usually thin, the flatness of the cover plate 100 will be poor after the shell 400 and the cover plate 100 are welded. The poor flatness of the cover plate 100 is manifested in that the surface of the cover plate 100 is uneven. For this reason, the present application proposes a cover plate 100.

[0044] Please refer to Figures 1 to 7 In some embodiments, the cover plate 100 includes: a first metal body 200 and a first non-metallic part 300. The material of the first metal body 200 can be specifically stainless steel, aluminum, iron or other metals or alloys. Among them, the first metal body 200 can be welded to the shell 400 to complete the packaging of the battery cell. The first metal body 200 is provided with a first through hole 220, and the first through hole 220 has two openings arranged opposite to each other. Specifically, the shape of the first through hole 220 may not be limited. For example, the shape of the first through hole 220 may be rectangular, square, triangular, circular, "U"-shaped, "X"-shaped, and can be specifically referred to. Figures 2 to 7. In addition, the number of the first through holes 220 is not specifically limited. For example, the first through holes 220 may be one, two or three, and the plurality of first through holes 220 may be arranged in an array or irregularly. The material of the first non-metallic part 300 may be polyetheretherketone or carbon fiber, etc. The first non-metallic part 300 is arranged in the first through hole 220, and the edge of the first non-metallic part 300 surrounds and is connected to the hole wall of the first through hole 220. Among them, after the first through hole 220 is set in the first metal body 200, the first metal body 200 is used to connect to the shell 400. After the first metal body 200 is directly connected to the shell 400, due to the existence of the first through hole 220, the effect of encapsulating the battery cell cannot be achieved. Therefore, after the first non-metallic part 300 is connected to the hole wall of the first through hole 220, the battery cell can be encapsulated. Specifically, in the prior art, the cover plate 100 is entirely made of metal. Therefore, the stress generated during welding can lead to poor flatness of the cover plate 100. In the present application, by providing a first through-hole 220 on the first metal body 200 and disposing the first non-metallic member 300 in the first through-hole 220, the cover plate 100 can be divided into regions. Compared to the cover plate 100 in the prior art, the area of ​​the first metal body 200 of the cover plate 100 in the present application is smaller. Therefore, when the cover plate 100 is welded, the stress generated by welding is dispersed, which can effectively improve the flatness of the cover plate 100. Specifically, the cover plate 100 can have good flatness.

[0045] Further, the following describes the specific method of connecting the first metal body 200 and the first non-metallic member 300, please refer to Figure 8 In some embodiments, the first metal body 200 includes a first body portion 230 and a first protruding portion 210. The first protruding portion 210 is connected to the first body portion 230, and the first protruding portion 210 protrudes relative to the first body portion 230. The first protruding portion 210 is provided with a first through hole 220, and the first body portion 230 is provided with a second through hole 240, and the first through hole 220 and the second through hole 240 are connected. In this way, a step surface can be formed on the first metal body 200, thereby facilitating the connection of the first non-metallic part 300 to the hole wall of the first through hole 220. Specifically, when the first non-metallic part 300 is connected to the first metal body 200, the first non-metallic part 300 is directly placed on the hole wall of the first through hole 220, which can facilitate the installation of the first non-metallic part 300 and the first metal body 200.

[0046] Further, the specific method of connecting the first metal body 200 and the first non-metallic member 300 is described below. Figure 9In some embodiments, the first metal body 200 includes a first body portion 230 and a first protrusion 210. The first protrusion 210 is connected to the first body portion 230 and protrudes relative to the first body portion 230. The first protrusion 210 is provided with a first through-hole 220, and the first body portion 230 is provided with a second through-hole 240. The first through-hole 220 and the second through-hole 240 are connected, which can form a step surface on the first metal body 200. The step surface can facilitate the placement of the second body portion 310 thereon. That is, the first non-metallic component 300 includes a second body portion 310 and a second protrusion 320. The second protrusion 320 is connected to the second body portion 310 and protrudes relative to the second body portion 310. The second body portion 310 is disposed in the first through-hole 220, and the second protrusion 320 is disposed in the second through-hole 240. The above-described design of the first metal body 200 and the first non-metallic member 300 not only facilitates installation of the first metal body 200 and the first non-metallic member 300, but also effectively improves the strength of the cover plate 100 by positioning the second body portion 310 in the first through-hole 220 and the second protrusion 320 in the second through-hole 240. This improves the strength of the cover plate 100, thereby extending the service life of the battery 10. Furthermore, the sum of the thicknesses of the first body portion 230 and the first protrusion 210 can be equal to the sum of the thicknesses of the second body portion 310 and the first body portion 230.

[0047] Furthermore, in some embodiments, the first non-metallic member 300 is bonded to the wall of the first through-hole 220. Specifically, the first non-metallic member 300 can be bonded to the wall of the first through-hole 220 using glue, thereby connecting the first non-metallic member 300 and the first metal body 200. The glue can form a glue layer at the connection between the two. The glue can specifically be an electrolyte-resistant glue, such as a modified epoxy resin glue, a polysulfide sealant, or a fluorosilicone MS sealant. The electrolyte-resistant glue melts when heated between 120°C and 200°C, thus providing a thermal pressure relief mechanism. That is, after the cover 100 and the housing 400 are welded, the battery cell is positioned within the housing 400. When the battery cell experiences thermal runaway, the heat within the housing 400 is relatively high, causing the electrolyte-resistant glue to melt, thereby separating the first non-metallic member 300 from the first metal body 200. The first through-hole 220 opens, facilitating the discharge of heat from within the housing 400, effectively preventing the battery 10 from exploding.

[0048] Furthermore, in some embodiments, the density of the first metal body 200 is greater than the density of the first non-metallic member 300. Specifically, when the density of the first non-metallic member 300 is less than the density of the first metal body 200, the overall weight of the cover plate 100 can be reduced, thereby achieving lightweight cover plate 100.

[0049] Furthermore, in some embodiments, the strength of the first metal body 200 is lower than the strength of the first non-metallic member 300. Specifically, when the strength of the first non-metallic member 300 is greater than the strength of the first metal body 200, the overall strength of the cover plate 100 can be further improved, thereby extending the service life of the cover plate 100.

[0050] Furthermore, in some embodiments, the area of ​​the first metal body 200 is S1, the area of ​​the first non-metallic part 300 is S2, and 0.25≤S2 / S1. S2 / S1 can be 0.25, 0.3, 0.4, or 0.5, etc. Specifically, when the area of ​​the first non-metallic part 300 is less than one-quarter of the first metal body 200, due to the larger area of ​​the first metal body 200, a problem of poor flatness may occur. In addition, when the area of ​​the first metal body 200 is larger, the density of the first metal body 200 is greater than the density of the first non-metallic part 300, and the area of ​​the first non-metallic part 300 is smaller, which may result in a poor weight reduction effect for the cover plate 100.

[0051] Please refer to Figure 10 In some embodiments, the battery 10 includes a housing 400 and the cover plate 100 of any of the above embodiments. The housing 400 has a storage cavity for accommodating the battery cells. The housing 400 can be made of metal and can be connected to the negative electrode of the battery cell, thereby causing the housing 400 to be negatively charged. The housing 400 can also be connected to the positive electrode of the battery cell, thereby causing the housing 400 to be positively charged. The cover plate 100 is connected to the housing 400 to seal the opening of the storage cavity. Specifically, in the prior art, the cover plate 100 is made of metal as a whole, so the stress generated by welding during welding will cause the flatness of the cover plate 100 to be poor. In the present application, by setting the first through hole 220 on the first metal body 200 and setting the first non-metallic part 300 in the first through hole 220, the cover plate 100 can be divided into regions. Compared with the cover plate 100 in the prior art, the area of ​​the first metal body 200 of the cover plate 100 in the present application is smaller, so that when the cover plate 100 is welded, the stress generated by welding will be dispersed, which can effectively make the flatness of the cover plate 100 better. Specifically, the cover plate 100 can have good flatness. Furthermore, the yield rate of the battery 10 with the cover plate 100 is higher.

[0052] Furthermore, the specific structure of the housing 400 is described below. The housing 400 and the cover 100 are welded to each other. It is conceivable that the cover 100 may have a poor flatness problem due to welding. For a thinner housing 400, the housing 400 may also have a poor flatness problem during welding. In order to effectively solve this problem and improve the flatness of the housing 400, the following methods can be used. Specifically, please refer to Figure 11 In some embodiments, the housing 400 includes a second metal body 500 and a second non-metallic member 600. The material of the second metal body 500 can be a metal or alloy such as stainless steel, aluminum, or iron. The second metal body 500 can be welded to the cover plate 100 to complete the packaging of the battery cell. The second metal body 500 is provided with a third through hole 520. The shape of the third through hole 520 is not limited. For example, the shape of the third through hole 520 can be rectangular, square, triangular, circular, "U"-shaped, or "X"-shaped. In addition, the number of third through holes 520 is not specifically limited. For example, there can be one, two, or three third through holes 520, and multiple third through holes 520 can be arranged in an array or an irregular arrangement. The material of the second non-metallic member 600 can be polyetheretherketone or carbon fiber. The second non-metallic member 600 is disposed in the third through hole 520, and the edge of the second non-metallic member 600 surrounds and connects to the wall of the third through hole 520. In the prior art, the housing 400 is entirely made of metal. Therefore, the stress generated by welding during welding can lead to poor flatness of the housing 400. In the present application, by providing a third through-hole 520 on the second metal body 500 and placing the second non-metallic member 600 in the third through-hole 520, the housing 400 can be divided into regions. Compared with the housing 400 in the prior art, the area of ​​the second metal body 500 of the housing 400 in the present application is smaller. Therefore, when the housing 400 is welded, the stress generated by welding is dispersed, which can effectively improve the flatness of the housing 400. Specifically, the housing 400 can have good flatness.

[0053] Further, the following describes the specific method of connecting the first metal body 200 and the first non-metallic member 300, please refer to Figure 12 In some embodiments, the second metal body 500 includes a third body portion 530 and a third protrusion 510. The third protrusion 510 is connected to the third body portion 530 and protrudes relative to the third body portion 530. The third protrusion 510 is provided with a third through-hole 520, and the third body portion 530 is provided with a fourth through-hole 540. The third through-hole 520 and the fourth through-hole 540 are connected. This can form a stepped surface on the second metal body 500, thereby facilitating the connection of the second non-metallic component 600 to the wall of the third through-hole 520. Specifically, when the second non-metallic component 600 is connected to the second metal body 500, it is directly placed on the wall of the third through-hole 520, which can facilitate the installation of the second non-metallic component 600 and the second metal body 500.

[0054] Further, the specific method of connecting the second metal body 500 and the second non-metallic member 600 is described below. Figure 13In some embodiments, the second metal body 500 includes a third body portion 530 and a third protrusion 510. The third protrusion 510 is connected to the third body portion 530 and protrudes relative to the third body portion 530. The third protrusion 510 is provided with a third through-hole 520, and the third body portion 530 is provided with a fourth through-hole 540. The third through-hole 520 and the fourth through-hole 540 are connected, which can form a step surface on the second metal body 500. The step surface facilitates the placement of the fourth body portion 610 thereon. In other words, the second non-metallic component 600 includes a fourth body portion 610 and a fourth protrusion 620. The fourth protrusion 620 is connected to the fourth body portion 610 and protrudes relative to the fourth body portion 610. The fourth body portion 610 is disposed in the third through-hole 520, and the fourth protrusion 620 is disposed in the fourth through-hole 540. The above-described design of the second metal body 500 and the second non-metallic member 600 not only facilitates installation of the second metal body 500 and the second non-metallic member 600, but also effectively improves the strength of the housing 400 by disposing the fourth body portion 610 in the third through-hole 520 and the fourth protrusion 620 in the fourth through-hole 540. This improves the strength of the housing 400, thereby extending the service life of the battery 10. Furthermore, the sum of the thicknesses of the third body portion 530 and the third protrusion 510 can be equal to the sum of the thicknesses of the fourth body portion 610 and the third body portion 530.

[0055] Furthermore, in some embodiments, the second non-metallic member 600 is bonded to the wall of the third through-hole 520. Specifically, the second non-metallic member 600 can be bonded to the wall of the third through-hole 520 using glue, thereby connecting the second non-metallic member 600 to the second metal body 500. The glue can form a glue layer at the connection between the two. The glue can specifically be an electrolyte-resistant glue, such as a modified epoxy resin glue, a polysulfide sealant, or a fluorosilicone MS sealant. The electrolyte-resistant glue melts when heated between 120°C and 200°C, thus providing a thermal pressure relief mechanism. That is, after the cover 100 and the housing 400 are welded, the battery cell is positioned within the housing 400. When the battery cell experiences thermal runaway, the heat within the housing 400 is relatively high, causing the electrolyte-resistant glue to melt, thereby separating the second non-metallic member 600 from the second metal body 500. The third through-hole 520 opens, facilitating the discharge of heat from within the housing 400, effectively preventing the battery 10 from exploding.

[0056] Furthermore, in some embodiments, the density of the second metal body 500 is greater than the density of the second non-metallic member 600. Specifically, when the density of the second non-metallic member 600 is less than the density of the second metal body 500, the overall weight of the housing 400 can be reduced, thereby achieving lightweighting of the housing 400.

[0057] Furthermore, in some embodiments, the strength of the second metal body 500 is lower than the strength of the second non-metallic member 600. Specifically, when the strength of the second non-metallic member 600 is greater than the strength of the second metal body 500, the overall strength of the housing 400 can be further improved, thereby extending the service life of the housing 400.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. In addition, the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. Cover plate, characterized in that, include: a first metal body, wherein the first metal body is provided with a first through hole, and the first through hole has two openings arranged opposite to each other; A first non-metallic member is disposed in the first through hole, and an edge of the first non-metallic member surrounds and is connected to a hole wall of the first through hole.

2. The cover plate according to claim 1, wherein: The first metal body includes a first main body portion and a first protruding portion, the first protruding portion is connected to the first main body portion, and the first protruding portion protrudes relative to the first main body portion, the first protruding portion is provided with the first through hole, the first main body portion is provided with a second through hole, and the first through hole and the second through hole are connected; the first non-metallic part is connected to the hole wall of the first through hole.

3. The cover plate according to claim 1, wherein: The first metal body includes a first body portion and a first protruding portion, the first protruding portion is connected to the first body portion and protrudes relative to the first body portion, the first protruding portion is provided with the first through hole, the first body portion is provided with a second through hole, and the first through hole and the second through hole are connected; the first non-metallic part includes a second body portion and a second protruding portion, the second protruding portion is connected to the second body portion and protrudes relative to the second body portion, the second body portion is provided in the first through hole, and the second protruding portion is provided in the second through hole.

4. The cover plate according to claim 1, wherein: The first non-metallic component is bonded to the hole wall of the first through hole.

5. The cover plate according to claim 1, wherein: The density of the first metal body is greater than the density of the first non-metallic part.

6. A battery, characterized in that include: a housing having a storage cavity; The cover plate according to any one of claims 1 to 5, connected to the housing to close the opening of the storage cavity.

7. The battery according to claim 6, characterized in that The shell includes a second metal body and a second non-metallic part, the second metal body is provided with a third through hole; the second non-metallic part is arranged in the third through hole, and the edge of the second non-metallic part surrounds and is connected to the hole wall of the third through hole.

8. The battery according to claim 7, characterized in that The second metal body includes a third body portion and a third protruding portion, the third protruding portion is connected to the third body portion, and the third protruding portion protrudes relative to the third body portion, the third protruding portion is provided with the third through hole, the third body portion is provided with a fourth through hole, and the third through hole and the fourth through hole are connected; the second non-metallic part is connected to the hole wall of the third through hole.

9. The battery according to claim 7, characterized in that The second metal body includes a third body portion and a third protruding portion, the third protruding portion is connected to the third body portion, and the third protruding portion protrudes relative to the third body portion, the third protruding portion is provided with the third through hole, the third body portion is provided with a fourth through hole, and the third through hole and the fourth through hole are connected; the second non-metallic part includes a fourth body portion and a fourth protruding portion, the fourth protruding portion is connected to the fourth body portion, and the fourth protruding portion protrudes relative to the fourth body portion, the fourth body portion is provided in the third through hole, and the fourth protruding portion is provided in the fourth through hole.

10. The battery according to claim 7, characterized in that The second non-metallic component is bonded to the hole wall of the third through hole.

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