Battery and battery pack

Abstract

A battery and a battery pack. The battery comprises: a main body (1), wherein a mounting hole (101) is formed on a side surface of the main body (1), the side surface of the main body (1) comprises a flat plate area (102) and a welding area (103), and the mounting hole (101) is arranged corresponding to the welding area (103). In the width direction of the side surface of the main body (1), the distance between the hole edge of the mounting hole (101) and the edge of the side surface of the main body (1) is denoted as a, the width of the flat plate area (102) is denoted as T, and the width of the welding area (103) is denoted as T1. By setting the width of the main body corresponding to the welding area (103) to be slightly wider than the width of the main body (1) corresponding to the flat plate area (102), after an explosion-proof valve (2) is welded to the mounting hole (101), and the width of the main body (1) corresponding to the welding area (103) is reduced, the width of the main body (1) corresponding to the welding area (103) can be consistent with the width corresponding to the flat plate area (102), improving the consistency of the width of the main body (1), ensuring the assembly effect of the main body (1) and a casing, and improving the battery quality.

Description

Batteries and battery packs

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on February 4, 2024, with application number 2024101548286 and invention name “Battery and Battery Pack”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to batteries and battery packs. Background Art

[0004] As battery technology becomes increasingly mature, power batteries are widely used in electric vehicles and energy storage fields, and the requirements for battery performance and safety are increasing. The outer shell is a key component in the battery. Its function is to form a sealed cavity, lead out the positive and negative electrodes of the electrode group, and serve as an assembly carrier. When a battery malfunctions, a large amount of flammable gas is generated inside, which significantly increases the internal air pressure of the battery and can easily cause the battery to explode. For this reason, in order to prevent the occurrence of battery explosions, an explosion-proof valve is usually installed on the outer shell. The explosion-proof valve is usually connected to the plain aluminum plate by welding. When the edge of the explosion-proof valve is close to the edge of the plain aluminum plate, the cooling and shrinkage of the plain aluminum plate itself after welding the explosion-proof valve can easily lead to a reduction in the width of the assembly steps on both sides of the plain aluminum plate corresponding to the weld, affecting the consistency of the width of the outer shell.

[0005] Summary of the Invention

[0006] In view of this, the present application provides a battery and a battery pack to solve the problem of poor consistency in the width of the shell body in the prior art.

[0007] In a first aspect, the present application provides a battery, comprising: a main body, a mounting hole is opened on the side of the main body, the side of the main body includes a flat plate area and a welding area, the mounting hole is arranged corresponding to the welding area; along the width direction of the side of the main body, the distance between the hole edge of the mounting hole and the edge of the side of the main body is a, the width of the flat plate area is T, and the width of the welding area is T1, satisfying Where 8≤x≤12, and x is a real number.

[0008] Beneficial effect: By setting the width of the main body corresponding to the welding area to be slightly wider than the width of the main body corresponding to the flat plate area, when the explosion-proof valve is welded to the mounting hole, the width of the main body corresponding to the welding area is reduced and can be kept consistent with the width of the flat plate area, thereby improving the consistency of the main body width, ensuring the assembly effect of the main body and other components, and improving the battery quality.

[0009] In an optional embodiment, the distance a between the edge of the mounting hole and the edge of the side surface of the main body is greater than 1.5 mm.

[0010] In an optional embodiment, a rivet hole is opened on the side surface of the main body, and the side surface of the main body also includes a rivet area, and the rivet hole is arranged corresponding to the rivet area.

[0011] Beneficial effect: By providing the riveting holes, the pole assembly is easily assembled on the main body.

[0012] In an optional embodiment, along the width direction of the side of the main body, the distance between the hole edge of the rivet hole and the edge of the side of the main body is b, and the width of the rivet area is T2, satisfying Where, 10≤ y≤14, and y is a real number.

[0013] Beneficial effect: By setting the width of the main body corresponding to the riveting area to be slightly narrower than the width of the main body corresponding to the flat plate area, after the pole assembly is riveted into the rivet hole, the width of the main body corresponding to the riveting area is increased and can be consistent with the width of the flat plate area, thereby improving the consistency of the main body width, ensuring the assembly effect of the main body and other components, and improving the battery quality.

[0014] In an optional embodiment, a distance b between the edge of the rivet hole and the edge of the side surface of the main body is 2 mm to 10 mm.

[0015] In an optional embodiment, the main body includes a cover plate or a shell, and the mounting hole is provided corresponding to the cover plate or the shell.

[0016] In an optional embodiment, the edge of the cover plate has a stepped structure.

[0017] Beneficial effect: The edge of the cover plate is set to be stepped, which facilitates the positioning and assembly of the cover plate and the opening of the shell.

[0018] In an optional embodiment, the width of the flat plate area T = (13 + B ± z) mm, wherein B ≥ 0, B is the minimum process increment of 13 mm of the width of the flat plate area, the unit of B is mm, 0.03 ≤ z ≤ 0.08, z is the tolerance of the width of the flat plate area, and the unit of z is mm.

[0019] In an optional embodiment, the battery further includes a pole assembly, which is riveted corresponding to the rivet hole; and / or the battery further includes an explosion-proof valve, which is arranged corresponding to the mounting hole and welded to the main body; and / or the battery further includes a pole group, which is arranged in the shell.

[0020] In a second aspect, the present application also provides a battery pack comprising the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] FIG1 is a schematic diagram of the overall structure of a cover plate according to an embodiment of the present application;

[0023] FIG2 is a top view of the cover plate shown in FIG1 ;

[0024] FIG3 is a cross-sectional view taken along line AA in FIG2 ;

[0025] FIG4 is a cross-sectional view taken along line BB in FIG2 ;

[0026] FIG5 is a cross-sectional view taken along line CC in FIG2 ;

[0027] FIG6 is a schematic diagram of the overall structure of the cover plate, terminal assembly, and explosion-proof valve of the blade battery according to an embodiment of the present application;

[0028] FIG7 is a schematic diagram of the overall structure of the cover plate, the electrode assembly and the explosion-proof valve of the square shell battery according to an embodiment of the present application.

[0029] Explanation of the reference numerals: 1. Main body; 101. Mounting hole; 102. Flat plate area; 103. Welding area; 104. Riveting hole; 105. Riveting area; 106. Outer plate; 107. Inner plate; 2. Explosion-proof valve; 3. Pole assembly. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0031] The following describes an embodiment of the present application with reference to FIG. 1 to FIG. 7 .

[0032] According to an embodiment of the present application, on one hand, a battery is provided, comprising a main body 1. A mounting hole 101 is provided on the side of the main body 1, and the side of the main body 1 comprises a flat plate area 102 and a welding area 103, wherein the mounting hole 101 is provided corresponding to the welding area 103. Along the width direction of the side of the main body 1, the distance between the hole edge of the mounting hole 101 and the edge of the side of the main body 1 is a, the width of the flat plate area 102 is T, and the width of the welding area 103 is T1, satisfying Where 8≤x≤12, and x is a real number.

[0033] By setting the width of the main body 1 corresponding to the welding area 103 to be slightly wider than the width of the main body 1 corresponding to the flat plate area 102, after the explosion-proof valve 2 is welded to the mounting hole 101, the width of the main body 1 corresponding to the welding area 103 is reduced and can be consistent with the width of the flat plate area 102, thereby improving the consistency of the main body width, ensuring the assembly effect of the main body and other components, and improving the battery quality.

[0034] In one embodiment, the main body 1 includes a cover plate or a housing, and the mounting hole 101 is provided corresponding to the cover plate or the housing. Specifically, in this embodiment, as shown in Figures 1 to 7, the mounting hole 101 is provided corresponding to the cover plate. Therefore, by setting the width of the cover plate corresponding to the welding area 103 to be slightly wider than the width of the cover plate corresponding to the flat plate area 102, after welding the explosion-proof valve 2, the width of the cover plate corresponding to the welding area 103 is reduced, thereby improving the consistency of the cover plate width and further improving the assembly effect of the cover plate and the housing.

[0035] Of course, in other alternative embodiments, the mounting hole 101 may also be provided corresponding to the housing.

[0036] It is worth noting that the width T of the flat plate area 102 is the design width of the battery. Therefore, by setting the width of the side of the main body 1 corresponding to the welding area 103 to T1, the width of the battery formed after welding the explosion-proof valve 2 on the main body 1 approaches the design width T. Specifically, in this embodiment, the width T of the flat plate area 102 is the design width of the cover plate.

[0037] It should be noted that in this embodiment, the width of the flat plate region 102 is T = (13 + B ± z) mm, where B ≥ 0, B is the minimum process increment of 13 mm for the width of the flat plate region 102, and the unit of B is mm. 0.03 ≤ z ≤ 0.08, z is the tolerance for the width of the flat plate region 102, and the unit of z is mm. That is, for blade batteries, the minimum process requirement for the cover plate width is 13 mm.

[0038] It should be noted that, as shown in Figure 2 , mounting hole 101 is an oblong hole. Specifically, mounting hole 101 comprises two semicircular segments and two straight segments. The semicircular segments are spaced apart from each other, and the two straight segments are connected between the semicircular segments. The straight segments are parallel to the edges of main body 1, and the distance between each straight segment and its corresponding side edge of main body 1 is a.

[0039] It should be further explained that a is the design value of the distance between the edge of the mounting hole 101 and the edge of the cover plate.

[0040] It is worth noting that the width T1 of the welding area 103 is set to 8≤x≤12, after the welding explosion-proof valve 2 welding area 103 shrinks, the width of the welding area 103 tends to the width T of the flat area 102 as much as possible. When the welding area 103 of the explosion-proof valve 2 on the cover plate shrinks, the width of the welding area 103 will be greater than the width of the flat plate area 102, resulting in poor width consistency of the cover plate; When the welding area 103 of the cover plate where the explosion-proof valve 2 is welded shrinks, the width of the welding area 103 is still smaller than the width of the flat plate area 102 , which also leads to poor width consistency of the cover plate.

[0041] In one embodiment, the distance a between the edge of the mounting hole 101 and the edge of the side of the main body 1 is greater than 1.5 mm. That is, in this embodiment, the distance a between the edge of the mounting hole 101 and the edge of the cover is greater than 1.5 mm.

[0042] It is worth noting that when the distance between the edge of the mounting hole 101 and the edge of the cover plate is too small, the strength of the welding area 103 cannot meet the requirements for the installation of the explosion-proof valve 2, affecting the overall quality of the battery.

[0043] It should be noted that, when the value of a is smaller, the cover plate corresponding to the welding area 103 shrinks more after the explosion-proof valve 2 is welded. Therefore, a larger adjustment value needs to be set for T.

[0044] In one embodiment, as shown in Figures 1 and 2 , a rivet hole 104 is provided on the side of the main body 1. The side of the main body 1 also includes a rivet area 105, and the rivet hole 104 is provided corresponding to the rivet area 105. The provision of the rivet hole 104 facilitates the assembly of the pole assembly 3 on the main body. Specifically, in this embodiment, the rivet hole 104 is provided on the cover plate.

[0045] In one embodiment, as shown in FIG2 to FIG5, along the width direction of the side of the main body 1, the distance between the hole edge of the rivet hole 104 and the edge of the side of the main body 1 is b, and the width of the rivet area 105 is T2, satisfying Where, 10≤y≤14, and y is a real number.

[0046] By setting the width of the main body 1 corresponding to the rivet area 105 to be slightly narrower than the width of the main body 1 corresponding to the flat plate area 102, after the pole assembly 3 is riveted into the rivet hole 104, the width of the main body 1 corresponding to the rivet area 105 is increased and can be consistent with the width of the flat plate area 102, thereby improving the consistency of the main body width, ensuring the assembly effect of the main body and other components, and improving the battery quality.

[0047] In this embodiment, as shown in Figures 1 to 7, the rivet holes 104 are provided corresponding to the cover plates. Therefore, by setting the width of the cover plates corresponding to the rivet areas 105 to be slightly narrower than the width of the cover plates corresponding to the flat plate areas 102, after the pole assembly 3 is riveted, the width of the cover plates corresponding to the rivet areas 105 is increased, thereby improving the consistency of the cover plate widths and further improving the assembly effect of the cover plates and the housing.

[0048] Of course, in other alternative embodiments, the rivet holes 104 may also be provided corresponding to the housing.

[0049] It is worth noting that by setting the width of the side surface of the main body 1 corresponding to the riveting area 105 to T2, the width of the battery formed after the electrode assembly 3 is riveted on the main body 1 approaches the designed width T.

[0050] It is worth noting that when the pole assembly 3 is riveted into the rivet hole 104, the pole assembly 3 causes the cover plate corresponding to the rivet area 105 to expand, thereby increasing the width of the rivet area 105 and resulting in poor width consistency of the cover plate. Therefore, in this embodiment, the width of the cover plate corresponding to the rivet area 105 is set to be slightly narrower than the designed width of the cover plate. When the cover plate and the pole assembly 3 are assembled, the pole assembly 3 increases the width of the rivet area 105, thereby maintaining a consistent width across the cover plate.

[0051] It is worth noting that, referring to FIG2 , the rivet hole 104 is a circular hole, and the distance between one edge of the side surface of the main body 1 and the nearest edge of the rivet hole 104 is b. Specifically, in this embodiment, the distance between one edge of the cover plate and the nearest edge of the rivet hole 104 is b.

[0052] It is worth noting that the width T2 of the riveting area 105 is set to 10≤y≤14, so that the pole assembly 3 is riveted in the riveting hole 104, causing the riveting area 105 to expand, and the width of the riveting area 105 is as close as possible to the width T of the flat plate area 102. When the pole assembly 3 is riveted on the cover plate to cause the riveted area 105 to expand, the width of the riveted area 105 will be greater than the width of the flat area 102, resulting in poor width consistency of the cover plate; When the pole assembly 3 is riveted on the cover plate to cause the riveted area 105 to expand, the width of the riveted area 105 will be smaller than the width of the flat plate area 102, which will also lead to poor width consistency of the cover plate.

[0053] In one embodiment, the distance b between the edge of the rivet hole 104 and the edge of the side of the main body 1 is 2 mm to 10 mm. That is, in this embodiment, the distance b between the edge of the rivet hole 104 and the edge of the cover plate is 2 mm to 10 mm.

[0054] It is worth noting that, referring to FIG. 2 , the rivet hole 104 is a circular hole, and the distance between one edge of the cover plate and the nearest edge of the rivet hole 104 is b.

[0055] It should be noted that b is the design value of the distance between the edge of the rivet hole 104 and the edge of the cover plate.

[0056] It is worth noting that when the distance between the edge of the rivet hole 104 and the edge of the cover plate is too small, the strength of the rivet area 105 cannot meet the installation requirements of the pole assembly 3, affecting the overall quality of the battery; when the distance between the edge of the rivet hole 104 and the edge of the cover plate is too large, the width of the cover plate will increase, resulting in waste of material.

[0057] It should be noted that, when the value of b is smaller, the amount of material expansion of the cover plate corresponding to the riveting area 105 is greater after the pole assembly 3 is riveted. Therefore, a larger adjustment value needs to be set for T.

[0058] In one embodiment, as shown in Figures 3 to 5 , the edge of the cover plate has a stepped structure. Specifically, the cover plate includes an outer plate 106 and an inner plate 107. Along the thickness of the cover plate, the inner plate 107 is connected to the inner side of the outer plate 106. Along the circumference of the cover plate, the outer periphery of the outer plate 106 protrudes beyond the outer periphery of the inner plate 107, forming a stepped structure at the outer periphery of the cover plate. The stepped edge of the cover plate facilitates positioning and assembly of the cover plate with the opening of the housing.

[0059] It is worth noting that since the flat area 102, welding area 103 and riveted area 105 of the cover plate are set with different widths, the edge of the cover plate has an irregular structure (i.e., non-linear). When the cover plate is assembled with the explosion-proof valve 2 and the pole assembly 3, the edge of the cover plate approaches a linear shape due to the welding of the explosion-proof valve 2 and the riveting of the pole assembly 3.

[0060] It should be noted that, as shown in Figures 1 to 6, the cover plate of this embodiment can be the cover plate of a blade battery. Specifically, a rivet hole 104 and a mounting hole 101 are provided on the cover plate. The rivet hole 104 is used to rivet the pole assembly 3 (positive or negative), and the mounting hole 101 is used to weld the explosion-proof valve 2. Alternatively, as shown in Figure 7, the cover plate of this embodiment can also be the cover plate of a square shell battery. The cover plate has two rivet holes 104 and a mounting hole 101. The two rivet holes 104 are arranged at intervals, and the mounting hole 101 is located between the two rivet holes 104. The two rivet holes 104 are used to rivet the two pole assemblies 3 (positive and negative), respectively, and the mounting hole 101 is used to weld the explosion-proof valve 2.

[0061] The following is a measurement of the width of different cover plates before and after welding the explosion-proof valve 2. The measurement results of the embodiment and the comparative example are shown in Tables 1 to 3. Among them, the cover plate of the embodiment refers to the width of the welding area 103 according to the embodiment. Wherein, 8≤x≤12 is processed; the cover plate of the comparative example refers to the width of the welding area 103 processed according to the designed width T.

[0062] Table 1 Measurement results of Example 1 and Comparative Example 1 before and after welding explosion-proof valve 2

[0063] Table 2 Measurement results of Example 2 and Comparative Example 2 before and after welding explosion-proof valve 2

[0064] Table 3 Measurement results of Example 3 and Comparative Example 3 before and after welding explosion-proof valve 2

[0065] As can be seen from Table 1, in Example 1, T = 17 ± 0.05 mm, a = 2.5 mm, the width T1 of the welding zone 103 is set in the range of 17.033 to 17.05 before the explosion-proof valve 2 is welded, and the width T1 of the welding zone 103 is reduced after the explosion-proof valve 2 is welded, so that the values ​​of T1, T3, T4 and T5 tend to be consistent, so that the measured value difference of the width of the cover plate at various locations after welding the explosion-proof valve 2 is within the range of ± 0.01 mm, which means that the width consistency of the cover plate is good.

[0066] As can be seen from Table 2, in Example 2, T = 17 ± 0.05 mm, a = 3.5 mm, the width T1 of the welding zone 103 is set in the range of 17.024 to 17.036 before the explosion-proof valve 2 is welded, and the width T1 of the welding zone 103 is reduced after the explosion-proof valve 2 is welded, so that the values ​​of T1, T3, T4 and T5 tend to be consistent, so that the measured value difference of the width of the cover plate at various locations after welding the explosion-proof valve 2 is within the range of ± 0.01 mm, which means that the width consistency of the cover plate is good.

[0067] It can be seen from Table 3 that in Example 3, T=17±0.05mm, a=5mm, and the width T1 of the welding zone 103 is set in the range of 17.017~17.025 before the explosion-proof valve 2 is welded. After the explosion-proof valve 2 is welded, the width T1 of the welding zone 103 is reduced, so that the values ​​of T1, T3, T4 and T5 tend to be consistent, so that the measured value difference of the width of the cover plate at various locations after welding the explosion-proof valve 2 is within the range of ±0.01mm, which means that the width consistency of the cover plate is good.

[0068] It can be seen from Tables 1 to 3 that in Comparative Examples 1 to 3, before the explosion-proof valve 2 is welded, the width T1 of the welding zone 103 is consistent with the widths T3, T4 and T5 of the flat plate area 102. However, after the explosion-proof valve 2 is welded, the width T1 of the welding zone 103 decreases, resulting in the measured width differences of the cover plate after welding the explosion-proof valve 2 exceeding ±0.01 mm, which means that the width consistency of the cover plate is poor.

[0069] It is worth noting that, referring to FIG. 2 , in Tables 1 to 3, T3 , T4 , and T5 correspond to the widths of different positions of the flat plate region 102 , respectively.

[0070] It is worth noting that the value of a can be set according to actual design needs.

[0071] The following is a measurement of the width of different cover plates before and after riveting the pole assembly 3. The measurement results of the embodiment and the comparative example are shown in Tables 4 to 6. The cover plate of the embodiment refers to the width of the riveted area 105 according to the embodiment. Among them, 10≤y≤14, processing is performed; the cover plate of the comparative example means that the width of the riveted area 105 is processed according to the designed width T.

[0072] Table 4 Measurement results of Example 1 and Comparative Example 1 before and after riveting pole assembly 3

[0073] Table 5 Measurement results of Example 2 and Comparative Example 2 before and after riveting pole assembly 3

[0074] Table 6 Measurement results of Example 3 and Comparative Example 3 before and after riveting the pole assembly 3

[0075] As can be seen from Table 4, in Example 1, T = 18 ± 0.05 mm, b = 2.5 mm, and the width T2 of the riveted area 105 is set in the range of 17.960 to 17.972 before the pole assembly 3 is riveted. After the pole assembly 3 is riveted, the width T2 of the riveted area 105 is increased, so that the values ​​of T2, T3, T4, and T5 tend to be consistent, so that the measured values ​​of the width of the cover plate at various locations after the pole assembly 3 is riveted are within the range of ± 0.01 mm, which means that the width consistency of the cover plate is good.

[0076] As can be seen from Table 5, in Example 2, T = 18 ± 0.05 mm, b = 3.5 mm, and the width T2 of the riveted area 105 is set in the range of 17.971 to 17.980 before the pole assembly 3 is riveted. After the pole assembly 3 is riveted, the width T2 of the riveted area 105 is increased, so that the values ​​of T2, T3, T4, and T5 tend to be consistent, so that the measured values ​​of the width of the cover plate at various locations after the pole assembly 3 is riveted are within the range of ± 0.01 mm, which means that the width consistency of the cover plate is good.

[0077] As can be seen from Table 6, in Example 3, T = 18 ± 0.05 mm, b = 5 mm, and the width T2 of the riveted area 105 is set in the range of 17.980 to 17.986 before the pole assembly 3 is riveted. After the pole assembly 3 is riveted, the width T2 of the riveted area 105 is increased, so that the values ​​of T2, T3, T4, and T5 tend to be consistent, so that the measured values ​​of the width of the cover plate at various locations after the pole assembly 3 is riveted are within the range of ± 0.01 mm, which means that the width consistency of the cover plate is good.

[0078] As can be seen from Tables 4 to 6, in Comparative Examples 1 to 3, before the pole assembly 3 is riveted, the width T2 of the riveted area 105 is consistent with the widths T3, T4, and T5 of the flat plate area 102. However, after the pole assembly 3 is riveted, the width T2 of the riveted area 105 increases, resulting in the measured widths of the cover plate after the pole assembly 3 is riveted differing by more than ±0.01 mm, indicating that the width consistency of the cover plate is poor.

[0079] It is worth noting that, referring to FIG. 2 , in Tables 4 to 6, T3 , T4 , and T5 correspond to the widths of different positions of the flat plate region 102 .

[0080] It is worth noting that the value of b can be set according to actual design needs.

[0081] In one embodiment, as shown in FIG6 , the battery further includes an explosion-proof valve 2 , which corresponds to the mounting hole 101 and is welded to the cover plate.

[0082] In one embodiment, as shown in FIG6 , the battery further includes a pole assembly 3 , which is riveted corresponding to the rivet hole 104 .

[0083] In one embodiment, the battery further includes a pole group, which is disposed in the housing.

[0084] According to an embodiment of the present application, on another aspect, a battery pack is provided, comprising the above-mentioned battery.

[0085] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that: include: The main body has a mounting hole on its side, and the side of the main body includes a flat plate area and a welding area, and the mounting hole is arranged corresponding to the welding area; along the width direction of the side of the main body, the distance between the hole edge of the mounting hole and the edge of the side of the main body is a, the width of the flat plate area is T, and the width of the welding area is T1, which satisfies Where 8≤x≤12, and x is a real number.

2. The battery according to claim 1, characterized in that The distance a between the edge of the mounting hole and the edge of the side surface of the main body is greater than 1.5 mm.

3. The battery according to claim 1 or 2, characterized in that A rivet hole is opened on the side surface of the main body, and the side surface of the main body also includes a rivet area, and the rivet hole is arranged corresponding to the rivet area.

4. The battery according to claim 3, characterized in that Along the width direction of the side of the main body, the distance between the hole edge of the rivet hole and the edge of the side of the main body is b, and the width of the rivet area is T2, which satisfies Where, 10≤y≤14, and y is a real number.

5. The battery according to claim 4, characterized in that A distance b between the edge of the rivet hole and the edge of the side surface of the main body is 2 mm to 10 mm.

6. The battery according to claim 3, characterized in that The main body includes a cover plate or a shell, and the mounting hole is arranged corresponding to the cover plate or the shell.

7. The battery according to claim 6, characterized in that The edge of the cover plate is in a stepped structure.

8. The battery according to claim 1 or 2, characterized in that The width of the flat plate area T = (13 + B ± z) mm, where B ≥ 0, B is the minimum process increment of 13 mm of the width of the flat plate area, the unit of B is mm, 0.03 ≤ z ≤ 0.08, z is the tolerance of the width of the flat plate area, and the unit of z is mm.

9. The battery according to claim 6, characterized in that The battery further includes a pole assembly, wherein the pole assembly is riveted corresponding to the rivet hole; and / or, The battery further includes an explosion-proof valve, which is arranged corresponding to the mounting hole and welded to the main body; and / or, The battery further includes a pole group, which is disposed in the shell.

10. A battery pack, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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