Battery shell and battery

Abstract

The utility model discloses a battery shell and a battery. The battery shell comprises an outer shell, an inner plastic plate and an anti-explosion valve, the shell is a steel shell, the outer shell comprises a first shell part, and an exhaust hole is formed in the first shell part; the inner plastic plate is arranged on the inner wall of the first shell part, an exhaust channel is defined between the inner plastic plate and the first shell part, a ventilation structure is formed on the inner plastic plate, and the exhaust channel is communicated with the ventilation structure and the exhaust hole; the anti-explosion valve is arranged on the outer shell and covers the exhaust hole. According to the battery shell disclosed by the embodiment of the utility model, the battery shell has relatively high strength and excellent thermal stability, and the condition that the battery shell is cracked or exploded is reduced or avoided.

Description

Technical Field

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

[0002] During the operation of the battery, the battery shell needs to have a certain strength to withstand the pressure inside the battery; when the battery experiences thermal runaway, the battery shell will be in a high temperature environment, and the battery shell will lose strength in a high temperature environment, all of which put forward higher requirements on the strength of the battery shell. However, in the related art, the strength of the battery shell is relatively low, which makes the battery shell prone to cracking or explosion. Therefore, improvement is needed. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery housing with high strength and excellent thermal stability, which reduces or avoids the occurrence of cracking or explosion of the battery housing.

[0004] The utility model also provides a battery having the battery housing.

[0005] The battery case according to the first embodiment of the utility model includes: an outer shell, which is a steel shell, and includes a first shell portion, on which an exhaust hole is formed; an inner plastic plate, which is arranged on the inner wall of the first shell portion, and an exhaust channel is defined between the inner plastic plate and the first shell portion, and a ventilation structure is formed on the inner plastic plate, and the exhaust channel connects the ventilation structure and the exhaust hole; and an explosion-proof valve, which is arranged on the outer shell and covers the exhaust hole.

[0006] According to the battery case of the embodiment of the utility model, the battery case is formed into a steel shell, so that the battery case has high strength and excellent thermal stability, reducing or avoiding the occurrence of cracking or explosion of the battery case. By arranging exhaust holes, exhaust channels, ventilation structures and explosion-proof valves on the battery case, the gas generated inside the battery can be discharged during the operation of the battery or when the battery generates gas due to thermal runaway.

[0007] According to some embodiments of the present invention, the inner plastic plate includes a plastic plate body and a support protrusion provided on the plastic plate body, the support protrusion is connected to a side of the plastic plate body facing the first shell portion, and the support protrusion is connected to the first shell portion.

[0008] According to some optional embodiments of the present invention, the ventilation structure includes a first ventilation structure and a second ventilation structure that are spaced apart, the first ventilation structure is opposite to the exhaust hole, and the second ventilation structure is staggered from the exhaust hole.

[0009] According to some optional embodiments of the utility model, the support protrusions are multiple and spaced apart, the multiple support protrusions include a first support protrusion and a second support protrusion, the first ventilation structure is formed in a grid shape, the first support protrusion is located on the outer peripheral side of the first ventilation structure and is formed in a long strip extending along the circumference of the first ventilation structure, the second ventilation structure includes a plurality of ventilation holes spaced apart, and the second support protrusions are multiple and arranged adjacent to the ventilation holes.

[0010] According to some optional embodiments of the utility model, the inner plastic plate has a thickness a at the support protrusion position, and the protrusion height b of the support protrusion; wherein a has a value range of 1.0 mm to 2.0 mm, b has a value range of 0.7 mm to 1.3 mm, and b / a has a value range of 35% to 90%.

[0011] According to some optional embodiments of the utility model, the first shell portion includes a connected main body portion and a mounting portion, the mounting portion is recessed inwardly relative to the main body portion to form a groove, the explosion-proof valve is an explosion-proof disk, the explosion-proof disk is installed in the groove, the recessed height of the mounting portion relative to the main body portion is d, the protrusion height of the supporting protrusion is b, and b and d satisfy: b>d.

[0012] According to some embodiments of the utility model, the first shell portion includes a connected main body portion and a mounting portion, the mounting portion is recessed inwardly relative to the main body portion to form a groove, the explosion-proof valve is an explosion-proof disk, the explosion-proof disk is installed in the groove, the thickness of the mounting portion is the same as the thickness of the main body portion, or the outer surface of the explosion-proof disk is flush with the outer surface of the main body portion, or the recessed height d of the mounting portion relative to the main body portion is 0.1mm~0.5mm.

[0013] According to some optional embodiments of the present invention, the thickness of the outer shell is c, and the value range of c is 0.1 mm to 0.2 mm.

[0014] The battery according to the second embodiment of the present invention comprises: the battery housing according to the first embodiment of the present invention; a pole group disposed in the battery housing; and a pole disposed in the battery housing and electrically connected to the pole group.

[0015] According to the battery of the embodiment of the utility model, the battery has the above-mentioned battery shell, and by forming the battery shell into a steel shell, the battery shell has high strength and excellent thermal stability, reducing or avoiding the occurrence of cracking or explosion of the battery shell. By arranging exhaust holes, exhaust channels, ventilation structures and explosion-proof valves on the battery shell, the gas generated inside the battery can be discharged during the operation of the battery or when the battery has thermal runaway and generates gas.

[0016] According to some embodiments of the present invention, the battery housing includes a second shell portion arranged opposite to the first shell portion, and the pole is arranged in the second shell portion.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a three-dimensional structure of a battery housing according to some embodiments of the utility model;

[0020] Figure 2 yes Figure 1 A cross-sectional view of a partial structure of a battery housing in FIG.

[0021] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0022] Figure 4 yes Figure 1 The partial structure of the outer shell and the cross-sectional view of the explosion-proof valve;

[0023] Figure 5 yes Figure 1 A cross-sectional view of a portion of the structure of the outer shell;

[0024] Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure of the inner plastic plate;

[0025] Figure 7 yes Figure 1 A schematic diagram of the three-dimensional structure of the inner plastic plate from another perspective;

[0026] Figure 8 yes Figure 7 Enlarged view of point B in the middle.

[0027] Reference numerals:

[0028] 100. Battery housing;

[0029] 1. outer shell; 11. first shell portion; 111. main body portion; 112. mounting portion; 12. exhaust hole; 13. exhaust channel;

[0030] 2. Inner plastic plate; 21. Ventilation structure; 211. First ventilating structure; 212. Second ventilating structure; 22. Plastic plate body; 23. Support protrusion; 231. First support protrusion; 232. Second support protrusion;

[0031] 3. Explosion-proof valve. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] Reference below Figure 1-Figure 8 A battery housing 100 according to an embodiment of the present invention is described.

[0034] refer to Figure 1-Figure 8 According to the first embodiment of the utility model, the battery housing 100 comprises: an outer housing 1, an inner plastic plate 2 and an explosion-proof valve 3. The outer housing 1 is a steel housing, which has high strength and excellent thermal stability. When the battery has thermal runaway, the strength loss of the steel housing in the high temperature environment of thermal runaway is small, so that the outer housing 1 still has high strength in the high temperature environment, so that the battery housing 100 has high strength both during operation and when thermal runaway occurs, which can reduce or avoid the occurrence of cracking or explosion of the battery housing 100.

[0035] During the operation of the battery or when the battery has thermal runaway, the electrode group in the battery housing 100 will generate gas. The outer shell 1 includes a first shell portion 11, and a vent hole 12 is formed on the first shell portion 11. The vent hole 12 can discharge the gas in the battery housing 100 to the outside of the outer shell 1. The inner plastic plate 2 is arranged on the inner wall of the first shell portion 11, and the inner plastic plate 2 is used to support the electrode group in the battery housing 100. An exhaust channel 13 is defined between the inner plastic plate 2 and the first shell portion 11, and a ventilation structure 21 is formed on the inner plastic plate 2. The exhaust channel 13 connects the ventilation structure 21 and the exhaust hole 12. The exhaust channel 13 and the ventilation structure 21 provide a channel for the gas in the battery housing 100, so that the gas in the battery housing 100 can flow to the exhaust hole 12 and can be discharged to the outside of the outer shell 1 through the exhaust hole 12. The explosion-proof valve 3 is disposed on the outer shell 1 and covers the exhaust hole 12 . The gas discharged into the exhaust hole 12 can be discharged from the battery shell 100 through the explosion-proof valve 3 .

[0036] According to the battery case 100 of the embodiment of the utility model, the battery case 100 is formed into a steel shell, so that the battery case 100 has high strength and excellent thermal stability, reducing or avoiding the occurrence of cracking or explosion of the battery case 100. By arranging the exhaust hole 12, the exhaust channel 13, the ventilation structure 21 and the explosion-proof valve 3 on the battery case 100, the gas generated inside the battery can be discharged during the operation of the battery or when the battery generates gas due to thermal runaway.

[0037] refer to Figure 2-Figure 3 , Figure 6-Figure 8 According to some embodiments of the utility model, the inner plastic plate 2 includes a plastic plate body 22 and a support protrusion 23 provided on the plastic plate body 22, the support protrusion 23 is connected to the side of the plastic plate body 22 facing the first shell 11, and the support protrusion 23 is connected to the first shell 11. By providing the support protrusion 23 and connecting the support protrusion 23 to the first shell 11, the support protrusion 23 has a reinforcing effect on the inner plastic component, and the support protrusion 23 is used to further strengthen the support provided by the inner plastic plate 2 to the pole group provided in the battery housing 100.

[0038] When the battery is in thermal runaway, the inner plastic plate 2 will soften or even melt under high temperature, and the supporting effect of the inner plastic plate 2 on the electrode group in the battery housing 100 will be weakened. These electrode groups will press the inner plastic plate 2 downward, and will gradually press the ventilation structure 21, making the ventilation structure 21 smaller. The support protrusion 23 can slow down the softening or melting process of the inner plastic plate 2 as a whole, thereby reducing the degree of squeezing the ventilation structure 21, so that the gas in the battery housing 100 can still be discharged through the ventilation structure 21, avoiding the explosion of the battery due to the failure of timely discharge of the gas in the battery housing 100, and improving the safety performance of the battery housing 100.

[0039] refer to Figure 6-Figure 8 According to some optional embodiments of the utility model, the ventilation structure 21 includes a first ventilation structure 211 and a second ventilation structure 212 which are arranged at intervals, the first ventilation structure 211 is opposite to the exhaust hole 12, and the second ventilation structure 212 is staggered from the exhaust hole 12. By providing the first ventilation structure 211 and the second ventilation structure 212, the gas generated in the battery housing 100 can flow to the exhaust hole 12 through the exhaust channel 13 more timely, and be discharged from the battery housing 100 through the exhaust hole 12, thereby improving the safety performance of the battery housing 100.

[0040] refer to Figure 6-Figure 8 According to some optional embodiments of the utility model, the supporting protrusions 23 are multiple and arranged at intervals, and the multiple supporting protrusions 23 include a first supporting protrusion 231 and a second supporting protrusion 232. The first ventilation structure 211 is formed in a grid shape. The first supporting protrusion 231 is located at the outer peripheral side of the first ventilation structure 211 and is formed in a long strip extending along the circumference of the first ventilation structure 211. The second ventilation structure 212 includes a plurality of ventilation holes arranged at intervals, and the second supporting protrusions 232 are multiple and arranged adjacent to the ventilation holes. By arranging the first supporting protrusion 231 at the outer peripheral side of the first ventilation structure 211, the first supporting protrusion 231 forms a reinforcement effect on the inner plastic plate 2 of the outer peripheral side of the first ventilation structure 211, and arranging the second supporting protrusion 232 at the outer peripheral side of the second ventilation structure 212, the second supporting protrusion 232 forms a reinforcement effect on the inner plastic plate 2 of the outer peripheral side of the second ventilation structure 212. The supporting protrusions 23 are provided in plurality so that the reinforcing effect of the supporting protrusions 23 on the inner plastic plate 2 can be more uniform.

[0041] refer to Figure 2-Figure 3 According to some optional embodiments of the utility model, the thickness of the inner plastic plate 2 at the position of the support protrusion 23 is a, and the protrusion height of the support protrusion 23 is b; wherein the value range of a is 1.0mm-2.0mm, for example, the thickness a of the inner plastic plate 2 at the position of the support protrusion 23 can be 1.0mm, 1.3mm, 1.5mm, 1.8mm, 2.0mm, etc. The value range of b is 0.7mm-1.3mm, for example, the protrusion height b of the support protrusion 23 can be 0.7mm, 0.8mm, 1.0mm, 1.2mm, 1.3mm, etc. The value range of b / a is 35%-90%, for example, b / a can be 35%, 50%, 65%, 80%, 90%, etc.

[0042] If the thickness of the inner plastic plate 2 at the position of the support protrusion 23 is less than 1.0 mm, the size of the ventilation structure 21 formed on the inner plastic plate 2 will be smaller, and the volume of the ventilation structure 21 will be smaller, which may cause the gas flowability in the battery housing 100 to deteriorate, and the gas cannot be discharged in time, which may cause the battery housing 100 to crack or explode. If the thickness of the inner plastic plate 2 at the position of the support protrusion 23 is greater than 2.0 mm, the space occupied by the inner plastic plate 2 in the battery housing 100 will increase, resulting in a smaller battery capacity.

[0043] If the protrusion height b of the support protrusion 23 is less than 0.7mm, and b / a is less than 35%, the effect of the support protrusion 23 on strengthening the inner plastic plate 2 will be limited, and when the battery has thermal runaway, the support protrusion 23 will have limited effect on slowing down the softening or melting process of the entire plastic plate. If the protrusion height b of the support protrusion 23 is greater than 1.3mm, and b / a is greater than 90%, when the thickness of the inner plastic plate 2 at the position of the support protrusion 23 is constant, the thickness of the inner plastic plate 2 located above the support protrusion 23 will be smaller, so that the support strength of the inner plastic plate 2 located above the support protrusion 23 is lower, and at this time, the inner plastic plate 2 located above the support protrusion 23 is thinner, resulting in a higher difficulty in its processing technology.

[0044] refer to Figure 2-Figure 5 According to some optional embodiments of the utility model, the first shell 11 includes a main body 111 and a mounting portion 112 connected to each other, the mounting portion 112 is recessed inward relative to the main body 111 to form a groove, the explosion-proof valve 3 is an explosion-proof disk, the explosion-proof disk is installed in the groove, the recessed height of the mounting portion 112 relative to the main body 111 is d, the protrusion height of the support protrusion 23 is b, and b and d satisfy: b>d. By forming the mounting portion 112 and forming the mounting portion 112 to be recessed inward relative to the main body 111 to form a groove, it is convenient to position the explosion-proof valve 3 relative to the first shell 11, so as to improve the accuracy of the installation position of the explosion-proof valve 3.

[0045] The mounting portion 112 is recessed inward relative to the main body 111 to form a groove. The space occupied by the groove in the battery housing 100 is the space between the support protrusions 23 located below the inner plastic plate 2, so the groove does not occupy the internal space of the battery housing 100 and does not affect the capacity of the battery. By making b>d, the groove can be accommodated in the space between the support protrusions 23, avoiding interference between the groove and the inner plastic plate 2, and there is also a space between the groove and the inner plastic plate 2 to form an exhaust channel 13, so that the gas in the battery housing 100 can be discharged more easily, thereby further improving the safety performance of the battery housing 100.

[0046] refer to Figure 2-Figure 5According to some embodiments of the utility model, the first shell 11 includes a main body 111 and a mounting portion 112 connected to each other, the mounting portion 112 is recessed inward relative to the main body 111 to form a groove, the explosion-proof valve 3 is an explosion-proof disk, the explosion-proof disk is installed in the groove, and the thickness of the mounting portion 112 is the same as the thickness of the main body 111. By making the thickness of the mounting portion 112 the same as the thickness of the main body 111, the mounting portion 112 still has a high strength, and when the explosion-proof valve 3 is installed on the mounting portion 112, the connection strength between the explosion-proof valve 3 and the mounting portion 112 can be improved. For example, when the explosion-proof valve 3 is installed to the mounting portion 112 by welding, the thickness of the mounting portion 112 is the same as the thickness of the main body 111, which can avoid the reduction of the welding connection strength due to the small thickness of the mounting portion 112 during the welding process; or it can avoid the phenomenon of welding through the mounting portion 112 during the welding process, thereby avoiding large defects at the mounting portion 112.

[0047] refer to Figure 2-Figure 5 According to some embodiments of the present invention, the first shell 11 includes a main body 111 and a mounting portion 112 connected to each other, the mounting portion 112 is recessed inward relative to the main body 111 to form a groove, the explosion-proof valve 3 is an explosion-proof disk, the explosion-proof disk is installed in the groove, and the outer surface of the explosion-proof disk is flush with the outer surface of the main body 111. By making the outer surface of the explosion-proof disk flush with the outer surface of the main body 111, the explosion-proof valve 3 can be accommodated in the groove of the mounting portion 112, so that the explosion-proof valve 3 does not affect the flatness of the first shell 11, thereby avoiding affecting the vertical placement or vertical installation of the battery housing 100.

[0048] refer to Figure 2-Figure 5 According to some embodiments of the present invention, the first shell 11 includes a main body 111 and a mounting portion 112 connected to each other, the mounting portion 112 is recessed inward relative to the main body 111 to form a groove, the explosion-proof valve 3 is an explosion-proof disk, the explosion-proof disk is installed in the groove, and the thickness d of the explosion-proof disk is 0.1mm to 0.5mm. For example, the thickness d of the explosion-proof disk can be 0.1mm, 0.15mm, 0.35mm, 0.45mm, 0.5mm, etc. By making the thickness d of the explosion-proof disk 0.1mm to 0.5mm, the explosion-proof valves 3 of different thickness specifications can be completely accommodated in the groove.

[0049] refer to Figure 2-Figure 5According to some optional embodiments of the utility model, the thickness of the outer shell 1 is c, and the value range of c is 0.1mm-0.2mm. For example, the thickness c of the outer shell 1 can be 0.1mm, 0.13mm, 0.15mm, 0.18mm, 0.2mm, etc. If the thickness of the outer shell 1 is less than 0.1mm, the strength of the battery shell may be low, making the battery shell 100 prone to cracking or explosion; it may also make the connection strength between the explosion-proof valve 3 and the outer shell 1 low. For example, in the process of welding the explosion-proof valve 3 and other structures to the battery shell 100, the small thickness of the outer shell 1 may cause the welding strength to be reduced, or the outer shell 1 may be welded through during the welding process, which will increase the difficulty of welding the explosion-proof valve 3 and other structures to the battery shell 100. If the thickness of the outer shell 1 is greater than 0.2mm, the weight of the battery shell 100 will increase, thereby increasing the weight of the battery.

[0050] The battery according to the second embodiment of the present invention comprises: the battery housing 100 , the electrode group and the electrode column according to the above-mentioned embodiment, wherein the electrode group is arranged in the battery housing 100 , and the electrode column is arranged in the battery housing 100 and electrically connected to the electrode group.

[0051] According to the battery of the embodiment of the utility model, the battery has the above-mentioned battery housing 100. By forming the battery housing 100 into a steel shell, the battery housing 100 has high strength and excellent thermal stability, reducing or avoiding the occurrence of cracking or explosion of the battery housing 100. By arranging the exhaust hole 12, the exhaust channel 13, the ventilation structure 21 and the explosion-proof valve 3 on the battery housing 100, the gas generated inside the battery can be discharged during the operation of the battery or when the battery has thermal runaway and generates gas.

[0052] According to some embodiments of the utility model, the battery housing 100 includes a second housing portion arranged opposite to the first housing portion 11, and the pole is arranged in the second housing portion. For example, the first housing portion 11 may be a bottom housing plate of the battery housing 100, and the second housing portion may be a top cover of the battery housing 100. The explosion-proof valve 3 is arranged in the first housing portion 11, and the pole is arranged in the second housing portion, so that when the battery has thermal runaway, the discharge in the battery housing 100 is prevented from being sprayed onto the pole located in the second housing portion through the explosion-proof valve 3, causing an explosion or even causing a greater danger.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0055] In the description of the present invention, "plurality" means two or more.

[0056] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0057] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0058] In the description of this specification, the description with reference to the terms "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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery housing, It is characterized in that include: An outer shell, the outer shell is a steel shell, and the outer shell includes a first shell portion, and an exhaust hole is formed on the first shell portion; An inner plastic plate, the inner plastic plate being disposed on the inner wall of the first shell portion, an exhaust passage being defined between the inner plastic plate and the first shell portion, a ventilation structure being formed on the inner plastic plate, and the exhaust passage communicating the ventilation structure with the exhaust hole; An explosion-proof valve is arranged on the outer shell and covers the exhaust hole.

2. The battery case according to claim 1, It is characterized in that The inner plastic plate includes a plastic plate body and a supporting protrusion arranged on the plastic plate body, the supporting protrusion is connected to a side of the plastic plate body facing the first shell portion, and the supporting protrusion is connected to the first shell portion.

3. The battery case according to claim 2, It is characterized in that The ventilation structure comprises a first ventilation structure and a second ventilation structure which are arranged at intervals, wherein the first ventilation structure is opposite to the exhaust hole, and the second ventilation structure is staggered with the exhaust hole.

4. The battery case according to claim 3, It is characterized in that The support protrusions are multiple and spaced apart, and the multiple support protrusions include a first support protrusion and a second support protrusion. The first ventilation structure is formed in a grid shape. The first support protrusion is located on the outer peripheral side of the first ventilation structure and is formed in a long strip extending along the circumference of the first ventilation structure. The second ventilation structure includes a plurality of ventilation holes spaced apart. The second support protrusions are multiple and are arranged adjacent to the ventilation holes.

5. The battery case according to claim 2, It is characterized in that The thickness of the inner plastic plate at the position of the supporting protrusion is a, and the protrusion height of the supporting protrusion is b; Among them, the value range of a is 1.0mm~2.0mm, the value range of b is 0.7mm~1.3mm, and the value range of b / a is 35%~90%.

6. The battery case according to claim 2, It is characterized in that The first shell portion includes a connected main body portion and a mounting portion, the mounting portion is recessed inwardly relative to the main body portion to form a groove, the explosion-proof valve is an explosion-proof disk, the explosion-proof disk is installed in the groove, the recessed height of the mounting portion relative to the main body portion is d, the protrusion height of the supporting protrusion is b, and b and d satisfy: b>d.

7. The battery case according to claim 1, It is characterized in that The first shell portion includes a connected main body portion and a mounting portion, the mounting portion is recessed inward relative to the main body portion to form a groove, the explosion-proof valve is an explosion-proof disk, the explosion-proof disk is installed in the groove, the thickness of the mounting portion is the same as the thickness of the main body portion, or the outer surface of the explosion-proof disk is flush with the outer surface of the main body portion, or the thickness d of the explosion-proof disk is 0.1mm~0.5mm.

8. The battery casing according to any one of claims 1 to 7, It is characterized in that The thickness of the outer shell is c, and the value range of c is 0.1mm-0.2mm.

9. A battery, It is characterized in that include: The battery housing according to any one of claims 1 to 8; A pole group, arranged in the battery housing; A pole is disposed on the battery housing and is electrically connected to the pole group.

10. The battery according to claim 9, It is characterized in that The battery housing includes a second shell portion arranged opposite to the first shell portion, and the pole is arranged in the second shell portion.

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