Shell, battery and electric equipment

Abstract

The utility model provides a shell, a battery and electric equipment, and relates to the technical field of batteries, the shell is provided with an inner cavity, one axial end of the shell is provided with an opening, the shell comprises a first shell body and a second shell body which are distributed in the axial direction, the second shell body is provided with the opening, and the first shell body and the second shell body are arranged in the inner cavity. The inner ring area of the second shell is larger than the inner ring area of the first shell. According to the shell provided by the invention, the electrolyte injection space can be increased, and the electrolyte injection difficulty is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a housing, a battery, and an electrical device. Background Art

[0002] With the rapid development of technology, battery technology has been continuously innovated and has become an indispensable energy carrier in modern society. A battery generally includes a housing, a battery cell located inside the housing, and an electrolyte that immerses the battery cell. Electrical energy is stored and released through chemical reactions, and it is widely used in various electrical devices.

[0003] In the prior art, the battery cell is located inside the housing, and there is a certain gap between the battery cell and the housing to accommodate the electrolyte and provide a heat dissipation space for the battery cell. However, the space between the battery cell and the housing is small, resulting in difficulties in injecting the electrolyte and insufficient injection space. Utility Model Content

[0004] The present application provides a housing, a battery, and an electrical device to solve the problems that the space inside the battery cell and between the battery cell and the housing is small, resulting in difficulties in injecting the electrolyte and insufficient injection space.

[0005] In a first aspect, the present application provides a housing for a battery. The housing has an inner cavity, and one end of the housing in the axial direction has an opening. The housing includes a first housing and a second housing distributed along the axial direction. The second housing is provided with the opening, and the inner ring area of the second housing is larger than the inner ring area of the first housing.

[0006] In some embodiments, the outer walls of the first housing and the second housing are flush, and the wall thickness of the first housing is greater than the wall thickness of the second housing.

[0007] In some embodiments, the second housing includes a first end away from the first housing and a second end close to the first housing along the axial direction; along the axial direction and from the first end towards the second end, the wall thickness of the second housing gradually increases, and the second end is connected to the first housing.

[0008] In some embodiments, the wall thickness of the first housing is equal at different positions in the axial direction, and the wall thickness of the second housing is equal at different positions in the axial direction.

[0009] In some embodiments, the connection between the first housing and the second housing is transitioned by an arc.

[0010] In some embodiments, the wall thickness of the first housing is d1, and the wall thickness of the second housing is d2. The d1 and the d2 satisfy: d1 = d2 + a, where the value range of a is 0.03 mm - 1 mm.

[0011] In some embodiments, the value range of a is 0.2 mm - 0.5 mm.

[0012] In some embodiments, the value range of d2 is: 0.1 mm - 1 mm.

[0013] In some embodiments, the value range of d2 is: 0.3 mm - 0.5 mm.

[0014] In some embodiments, both ends of the outer shell along the axial direction have the openings, the number of the second shells is two, the two second shells are respectively connected to both sides of the first shell along the axial direction, and each end of each second shell away from the first shell is provided with the opening.

[0015] In some embodiments, the length of the outer shell along the axial direction is L; the lengths of the two second shells along the axial direction are both L1, and L1 and L satisfy: L1 = (0.01 - 0.5)L.

[0016] In some embodiments, L1 and L satisfy: L1 = (0.07 - 0.4)L.

[0017] In some embodiments, the value range of L is: L ≥ 70 mm.

[0018] In some embodiments, the lengths of the two second shells along the axial direction are different.

[0019] In some embodiments, both ends of the outer shell along the axial direction have the openings, and the openings are provided at the opposite ends of the first shell and the second shell.

[0020] In some embodiments, the outer shell is configured as a cylindrical shape, and the inner diameter of the second shell is greater than the inner diameter of the first shell.

[0021] In some embodiments, the outer shell is at least one of an aluminum structural member and a steel structural member.

[0022] In a second aspect, the present application provides a battery, including a battery cell, a cover plate assembly, and the above-mentioned outer shell. The battery cell is located in the inner cavity of the outer shell, the cover plate assembly covers the opening, and the cover plate assembly is provided with a liquid injection hole, and the liquid injection hole communicates with the inner cavity.

[0023] In some embodiments, the cover plate assembly includes: a cover plate body, a pole column, and a sealing assembly. The cover plate body covers the opening, the pole column penetrates through the cover plate body, the liquid injection hole is opened on the pole column, and the sealing assembly is used to separate the pole column and the cover plate body.

[0024] In some embodiments, the terminal post includes a first limiting portion, a second limiting portion, and a connecting portion. The connecting portion passes through a perforation formed in the cover body, and the first limiting portion and the second limiting portion are respectively located at two ends of the connecting portion. The sealing assembly includes an insulating member and a sealing member. The insulating member includes a first insulating section and a second insulating section. The first insulating section is located between the first limiting portion and the outer surface of the cover body, and the second insulating section is located between the connecting portion and the inner wall of the perforation. The sealing member includes a first sealing section and a second sealing section. The first sealing section is located between the second limiting portion and the inner surface of the cover body, and the second sealing section is located between the connecting portion and the inner wall of the perforation.

[0025] In some embodiments, the sealing assembly further includes: a reinforcing member clamped between the first insulating section and the first limiting portion; and / or an insulating spacer located between the second limiting portion and the inner surface of the cover body.

[0026] In some embodiments, the reinforcing member is an aluminum block; and / or the insulating member is a plastic part; and / or the sealing member is a plastic part.

[0027] In some embodiments, the cover assembly further includes a sealing cover and a sealing nail. The terminal post has a liquid injection groove inside, the liquid injection hole communicates with the liquid injection groove and the inner cavity, the sealing nail seals the liquid injection hole, and the sealing cover is connected to the terminal post and seals the liquid injection groove.

[0028] In a third aspect, the present application provides an electrical device including the battery described in the second aspect above.

[0029] The housing provided by the present application includes a first housing and a second housing distributed along the axis. The second housing is located on the side of the first housing facing the opening, and the inner ring area of the second housing is larger than the inner ring area of the first housing. With such a design, the larger inner ring area of the second housing increases the liquid injection space for the injection of the electrolyte, solving the problem of difficult liquid injection caused by space limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the housing provided by the embodiment of the present application;

[0032] Figure 2 is Figure 1 the partial enlarged view of the position A in

[0033] Figure 3 the structural schematic diagram of the housing provided by the embodiment of the present application Figure 1 ;

[0034] Figure 4 is Figure 3 the partial enlarged view of the position B in

[0035] Figure 5 the structural schematic diagram of the housing provided by the embodiment of the present application Figure 2 ;

[0036] Figure 6 is Figure 5 the partial enlarged view of the position C in

[0037] Figure 7 the structural schematic diagram of the housing provided by the embodiment of the present application Figure 3 ;

[0038] Figure 8 is Figure 7 the partial enlarged view of the position D in

[0039] Figure 9 the structural schematic diagram of the battery provided by the embodiment of the present application;

[0040] Figure 10 is Figure 9 the exploded view of the partial structure in

[0041] Figure 11 is Figure 9 the schematic diagram of another angle of

[0042] Figure 12 is Figure 11 the sectional view of the A-A section in

[0043] Explanation of reference numerals:

[0044] 100 - battery;

[0045] 1 - housing; 11 - first housing; 12 - second housing; 121 - first end; 122 - second end; 13 - opening; 14 - inner cavity;

[0046] 2 - Cover plate assembly; 21 - Cover plate body; 211 - Perforation; 22 - Terminal post; 220 - Liquid injection groove; 221 - Liquid injection hole; 222 - First limiting part; 223 - Second limiting part; 224 - Connecting part; 23 - Sealing assembly; 231 - Insulating part; 2311 - First insulating section; 2312 - Second insulating section; 232 - Sealing element; 2321 - First sealing section; 2322 - Second sealing section; 233 - Reinforcing part; 234 - Insulating spacer; 24 - Sealing cover; 25 - Sealing nail;

[0047] 200 - Battery cell. Detailed implementation manners

[0048] In order to make the above - mentioned objects, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0049] A battery generally includes a housing, a battery cell located inside the housing, and an electrolyte that submerges the battery cell. Electrical energy is stored and released through chemical reactions, and it is widely used in various electrical equipment.

[0050] In the related art, the battery cell is located inside the housing, and there is a certain gap between the battery cell and the housing to accommodate the electrolyte and provide a heat - dissipation space for the battery cell. However, the space between the battery cell and the housing is small, resulting in problems such as difficult electrolyte injection and insufficient injection space.

[0051] In view of this, the present application provides a housing, a battery, and an electrical equipment. The housing includes a first housing and a second housing distributed along the axis. The second housing is located on the side of the first housing facing the opening, and the inner - ring area of the second housing is larger than the inner - ring area of the first housing. With such a design, the larger inner - ring area of the second housing increases the injection space for the electrolyte, solving the problem of difficult injection caused by space limitation.

[0052] The following combines Figures 1 - 12 to detail the housing 1 provided in the embodiments of the present application.

[0053] Refer to Figure 1 and Figure 2 , the housing 1 of this embodiment is used for the battery 100. The housing 1 has an inner cavity 14, and one end of the housing 1 along the axis is provided with an opening 13. The housing 1 includes a first housing and a second housing distributed along the axis (such as Figure 1The first housing 11 and the second housing 12 are distributed in the Y direction (as shown), and the first housing 11 and the second housing 12, as two regions of the outer housing 1, can be integrally formed.

[0054] The second housing 12 is located on the side of the first housing 11 facing the opening 13. In other words, the opening 13 is formed in the second housing 12, and the inner ring area of the second housing 12 is larger than the inner ring area of the first housing 11. Here, the inner ring area is the area of the region enclosed by the inner circle contour of the cross-section of the outer housing 1 perpendicular to the axial direction.

[0055] For example, the cross-section of the outer housing 1 perpendicular to the axial direction can be circular, square, or other polygons. When the battery 100 is a cylindrical battery 100, the outer housing 1 is a cylindrical shell, and the inner ring areas of the first housing 11 and the second housing 12 are specifically the areas corresponding to the circular contours inside the cylindrical shell. When the battery 100 is a square shell, the outer housing 1 is a square shell, and the square shell has a length and a width. The inner ring areas of the first housing 11 and the second housing 12 specifically refer to the product of the dimensions in the length direction and the dimensions in the width direction inside the square shell, that is, the area corresponding to the square contour. For example, along the length direction inside the outer housing 1, the length dimension of the second housing 12 is larger than the length dimension of the first housing 11, and along the width direction inside the outer housing 1, the width dimension of the second housing 12 is larger than the width dimension of the first housing 11.

[0056] In other words, the outer housing 1 of this embodiment adopts a partition design, and the storage spaces in different regions are different. Specifically, the outer housing 1 is provided with the first housing 11 and the second housing 12 distributed along the axial direction, and the first housing 11 and the second housing 12 have different inner ring areas, constructing a gradually changing internal space. The second housing 12, as the region close to the opening 13 of the outer housing 1, has an inner ring area larger than that of the first housing 11. Thus, the larger inner ring area of the second housing 12 increases the liquid injection space for the electrolyte injection. With such a design, it is convenient for the electrolyte to flow during the injection process, solves the problem of difficult liquid injection caused by space limitation, and also improves the effective utilization rate of the internal space of the outer housing 1, enabling the electrolyte to be more evenly distributed inside the outer housing 1.

[0057] According to the outer housing 1 provided by the embodiment of the present application, the first housing 11 and the second housing 12 are distributed along the axial direction, the second housing 12 is located on the side of the first housing 11 facing the opening 13, and the inner ring area of the second housing 12 is larger than the inner ring area of the first housing 11. With such a design, the larger inner ring area of the second housing 12 increases the liquid injection space for the electrolyte injection, is convenient for the electrolyte to flow during the injection process, and solves the problem of difficult liquid injection caused by space limitation.

[0058] See Figures 3 - 8In some embodiments, the outer walls of the first shell 11 and the second shell 12 are flush, and the wall thickness of the first shell 11 is greater than the wall thickness of the second shell 12. For example, the wall thickness of the second shell 12 is less than the wall thickness of the first shell 11, thereby ensuring that the internal space of the second shell 12 is larger than the internal space of the first shell 11.

[0059] It should be noted that the greater wall thickness of the first shell 11 improves its structural strength, so that the first shell 11 can show higher resistance and stability when facing impact or load. For example, when the battery cell 200 undergoes a high-rate charge and discharge cycle, the middle area of the battery cell 200 swells, and the first shell 11 can prevent the outer shell 1 from breaking due to its higher structural strength.

[0060] In addition, for the wound battery cell, the expansion force near the shell opening 13 is smaller than the expansion force in the middle area. Therefore, the wall thickness of the second shell 12 can be relatively thin, so that the second shell 12 can increase the injection space for the injection of the electrolyte while maintaining sufficient structural strength, thereby reducing the difficulty of electrolyte injection.

[0061] See also Figure 3 and Figure 4 In some embodiments, the second shell 12 includes a first end 121 away from the first shell 11 along the axial direction of the shell 1 and a second end 122 close to the first shell 11. Along the axial direction of the shell 1 and in the direction from the first end 121 toward the second end 122, the wall thickness of the second shell 12 gradually increases, and the wall thickness of the second end 122 is equal to the wall thickness of the first shell 11.

[0062] In specific implementation, the wall thickness of the second shell 12 gradually increases from the first end 121 to the second end 122 along the axial direction of the shell 1. Such a design effectively enhances the structural strength of the second shell 12 while ensuring that the shell 1 has sufficient liquid injection space. The wall thickness of the second shell 12 is gradually increased, so that the shell 1 can more evenly disperse and resist stress when it is subjected to pressure or impact, thereby extending the service life and reliability of the shell 1.

[0063] In addition, the wall thickness of the second end 122 is consistent with the wall thickness of the first shell 11, ensuring a smooth transition between the second shell 12 and the first shell 11. Such a design can reduce the stress concentration problem that may be caused by a sudden change in wall thickness.

[0064] See also Figures 5 - 8 In some embodiments, the wall thickness of the first shell 11 at different axial positions of the outer shell 1 is equal, the wall thickness of the second shell 12 at different axial positions of the outer shell 1 is equal, and the wall thickness of the first shell 11 is greater than the wall thickness of the second shell 12.

[0065] It can be understood that the equal and relatively large wall thickness of the first housing 11 enhances the structural strength of the first housing 11. Due to the uniform wall thickness, when the first housing 11 bears external pressure, impact or load, it can be more stable and reliable, effectively resisting the risk of deformation and damage, thereby extending the service life and reliability of the outer shell 1.

[0066] In addition, the wall thickness of the second housing 12 is thinner than that of the first housing 11. The second housing 12 also adopts a constant wall thickness setting, enabling the second housing 12 to provide a larger liquid injection space for the electrolyte while maintaining a certain strength.

[0067] See Figure 7 and Figure 8 , in some embodiments, the connection between the first housing 11 and the second housing 12 has a rounded transition.

[0068] In specific implementation, there is a rounded transition between the first housing 11 and the second housing 12, reducing the phenomenon of local stress concentration, thereby extending the service life of the outer shell 1 and improving the ability of the outer shell 1 to resist impact and vibration.

[0069] See Figure 4 , Figure 6 and Figure 8 , in some embodiments, the wall thickness of the first housing 11 is d1, the wall thickness of the second housing 12 is d2, and d1 and d2 satisfy: d1 = d2 + a, where the value range of a is 0.03 mm - 1 mm.

[0070] It should be noted that the wall thickness difference between the first housing 11 and the second housing 12 helps to optimize the overall strength and rigidity of the outer shell 1 while ensuring sufficient liquid injection space inside the outer shell 1. The thicker first housing 11 (relatively larger d1) is usually located at the key stress-bearing parts of the outer shell 1. Increasing the wall thickness of the first housing 11 within a certain range can effectively improve the anti-deformation ability and load-bearing capacity of the outer shell 1, thereby enhancing the structural stability of the entire outer shell 1.

[0071] Among them, by adjusting the value range of a, the space of the inner cavity 14 of the outer shell 1 can be controlled while meeting the structural strength requirements of the outer shell 1. The a value range of 0.03 mm to 1 mm is neither too small to enhance the strength of the first housing 11 nor too large to result in too small a space for the inner cavity 14 of the outer shell 1. In summary, within the range of 0.03 mm to 1 mm, it is possible to meet the structural strength requirements of the outer shell 1 and increase the liquid injection space for the electrolyte as much as possible, solving the problem of difficult liquid injection.

[0072] Furthermore, the value range of a is 0.2 mm - 0.5 mm. For example, a can be 0.2 mm, 0.25 mm, 0.3 mm, 0.5 mm, etc., and of course, this embodiment does not limit it here. In this way, while ensuring the liquid injection space and smooth liquid injection of the electrolyte, the structural strength of the outer shell 1 is further ensured, avoiding problems such as deformation or rupture of the outer shell 1, and extending the service life of the outer shell 1.

[0073] In some embodiments, the value range of d2 is: 0.1 mm - 1 mm.

[0074] When specifically implemented, if the wall thickness of the second shell 12 is too small, it will result in insufficient structural strength of the outer shell 1. For example, when it is less than 0.1 mm, the wall thickness of the second shell 12 is too small, causing the outer shell 1 to be prone to deformation or rupture. If the wall thickness of the second shell 12 is too large, it will result in too small a liquid injection space for the electrolyte and difficult liquid injection. Therefore, the wall thickness of the second shell 12 can be 0.1 mm, 0.3 mm, 0.4 mm, 0.7 mm, etc., and of course, this embodiment does not limit it here. In this way, it can ensure that the structural strength of the second shell 12 meets the use requirements, while increasing the liquid injection space for the electrolyte and reducing the liquid injection difficulty.

[0075] Furthermore, the value range of d2 is: 0.3 mm - 0.5 mm. For example, the wall thickness of the second shell 12 can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, etc., and this embodiment does not limit it here. Thus, while ensuring that the structural strength of the second shell 12 meets the use requirements, it increases the liquid injection space for the electrolyte and reduces the liquid injection difficulty.

[0076] See Figure 1 , in some embodiments, both ends of the outer shell 1 along the axis have openings 13, there are two second shells 12, and the two second shells 12 are respectively located on both sides of the first shell 11 along the axis of the outer shell 1, and each end of each second shell 12 away from the first shell 11 is provided with an opening 13. The lengths of the two second shells along the axis can be the same or different.

[0077] It can be understood that by distributing the second shell 12 on both sides of the first shell 11, a more balanced support structure is formed, enabling the outer shell 1 to better disperse stress and reducing the risk of local deformation or damage. Thus, the overall structural stability of the outer shell 1 is enhanced.

[0078] See Figure 3 , Figure 5 and Figure 7 , in some embodiments, the length of the outer shell 1 along the axis is L; among the two second shells 12, the lengths of the two second shells 12 along the axis of the outer shell 1 are both L1, and L1 and L satisfy: L1 = (0.01 - 0.5)L.

[0079] In specific implementation, if the length of the second housing 12 along the axial direction of the outer housing 1 is too long, the structural strength of the outer housing 1 will be too low, making the outer housing 1 prone to deformation or rupture; if the length of the second housing 12 along the axial direction of the outer housing 1 is too short, the liquid injection space for the electrolyte will become smaller and liquid injection will be difficult. Therefore, the length L1 of one second housing 12 close to the cover body 21 along the axial direction of the outer housing 1 satisfies: L1 = (0.01 - 0.5)L. In this way, while ensuring that the structural strength of the outer housing 1 meets the usage requirements, the second housing 12 can increase the electrolyte liquid injection space and reduce the liquid injection difficulty.

[0080] Furthermore, L1 = (0.07 - 0.4)L. In this way, while ensuring that the structural strength of the outer housing 1 meets the usage requirements, the second housing 12 can increase the electrolyte liquid injection space and reduce the liquid injection difficulty.

[0081] In some embodiments, the value range of L is: L ≥ 70 mm.

[0082] It should be noted that the length of the outer housing 1 along the axial direction is greater than or equal to 70 mm. In this way, it helps to improve the overall structural stability of the outer housing 1, enhance the anti-deformation ability, and protect the internal structure of the outer housing 1 from damage. At the same time, with the appropriate extension of the length of the outer housing 1, the inner cavity 14 of the outer housing 1 can accommodate more battery materials, thereby increasing the capacity of the battery 100.

[0083] In some embodiments, the outer housing 1 includes at least one of an aluminum structural member and a steel structural member.

[0084] In specific implementation, the outer housing 1 can be formed by stamping or welding, and can include an aluminum structural member and a steel structural member. The outer housing 1 can select materials according to actual needs to achieve an optimal performance balance, and this embodiment does not limit it here.

[0085] In some embodiments, both ends of the outer housing 1 along the axial direction have openings 13, and openings 13 are provided at the opposite ends of the first housing 11 and the second housing 12. In this way, it is convenient for processing.

[0086] In some embodiments, the outer housing 1 is configured as a cylindrical shape, and the inner diameter of the second housing 12 is greater than the inner diameter of the first housing 11. In this way, the structure is simple and convenient for processing and forming.

[0087] Next, the battery 100 according to the second aspect embodiment of the present application will be described.

[0088] The battery 100 of this embodiment can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-cadmium battery, etc., and the embodiments of the present application do not limit this.

[0089] See Figures 9 - 12, the battery 100 of this embodiment can be a cylindrical battery, a blade battery, or a square shell battery. It includes a battery cell 200, a cover plate assembly 2, and the housing 1 in the above embodiment.

[0090] Among them, the battery cell 200 is located in the inner cavity 14 of the housing 1, and the cover plate assembly 2 is covered at the opening 13 to jointly form a relatively closed cavity with the housing 1. The cover plate assembly 2 is provided with a liquid injection hole 221, and the liquid injection hole 221 communicates with the inner cavity 14 of the housing 1. In this way, the electrolyte can be injected into the inner cavity 14 of the housing 1 through the liquid injection hole 221.

[0091] According to the battery 100 provided by the embodiment of the present application, the cover plate assembly 2 is covered at the opening 13 of the housing 1 to form a hollow inner cavity 14 with the housing 1. The cover plate assembly 2 is provided with a liquid injection hole 221 so that the electrolyte enters the inner cavity 14 through the liquid injection hole 221. Since the inner ring area of the second housing 12 is larger than the inner ring area of the first housing 11, the larger inner ring area of the second housing 12 increases the liquid injection space for the electrolyte injection, facilitating the flow of the electrolyte during the injection process, and solving the problem of difficult liquid injection caused by space limitation.

[0092] In some embodiments, the cover plate assembly 2 includes: a cover plate body 21, a pole column 22, and a sealing assembly 23. The cover plate body 21 is covered at the opening 13, and the pole column 22 penetrates through the cover plate body 21. For example, a through hole 211 can be opened on the cover plate body 21, and the pole column 22 penetrates through the through hole 211. A closable liquid injection hole 221 is opened on the pole column 22. The sealing assembly 23 is used to separate the pole column 22 and the cover plate body 21, and insulation is carried out between the pole column 22 and the cover plate body 21 through the sealing assembly 23.

[0093] It should be noted that in this embodiment, the cover plate body 21 covers the opening 13 of the housing 1, ensuring the sealing of the internal environment of the housing 1, and a through hole 211 matching the pole column 22 is also opened on the cover plate body 21. Such a design facilitates the installation of the pole column 22.

[0094] Furthermore, in order to realize the injection of the electrolyte, a liquid injection hole 221 is provided on the pole column 22, and the electrolyte enters the interior of the housing 1 through the liquid injection hole 221. The closability of the liquid injection hole 221 ensures that after the liquid injection is completed, the interior of the housing 1 can quickly return to a sealed state, preventing the leakage of the electrolyte or the intrusion of external impurities.

[0095] In addition, the sealing assembly 23 fits tightly between the pole post 22 and the cover plate body 21, effectively isolating the direct contact between the inside of the housing 1 and the external environment, as well as the direct contact between the cover plate body 21 and the pole post 22. With such a design, the sealing performance of the overall structure is enhanced, ensuring safety and stability during use, reducing risks such as electrolyte leakage that may be caused by poor sealing, and also preventing risks of self-discharge or short circuit.

[0096] See Figure 2 and Figure 10 , in some embodiments, the pole post 22 includes a first limiting portion 222, a second limiting portion 223, and a connecting portion 224. The connecting portion 224 passes through the through hole 211, and the first limiting portion 222 and the second limiting portion 223 are respectively located at both ends of the connecting portion 224.

[0097] The sealing assembly 23 includes: an insulating member 231, and the insulating member 231 includes: a first insulating section 2311 and a second insulating section 2312. The first insulating section 2311 is located between the first limiting portion 222 and the outer surface of the cover plate body 21, and the second insulating section 2312 is located between the connecting portion 224 and the inner wall of the through hole 211.

[0098] A sealing member 232, including: a first sealing section 2321 and a second sealing section 2322. The first sealing section 2321 is located between the second limiting portion 223 and the inner surface of the cover plate body 21, and the second sealing section 2322 is located between the connecting portion 224 and the inner wall of the through hole 211.

[0099] In some embodiments, by providing the first limiting portion 222, the second limiting portion 223, and the connecting portion 224, the pole post 22 realizes a stable connection and positioning with the cover plate body 21 and the sealing assembly 23. Specifically, the connecting portion 224 directly passes through the through hole 211 of the cover plate body 21. The first limiting portion 222 is located at one end of the connecting portion 224 and abuts against the outer surface of the cover plate body 21 (for example, the surface of the cover plate body 21 facing away from the battery cell 200), providing an outward supporting force and also restricting the movement of the pole post 22 in the radial direction (such as Figure 1 shown in the X direction), ensuring the stability of the connection. Relatively, the second limiting portion 223 is located at the other end of the connecting portion 224 and abuts against the inner surface of the cover plate body 21 (for example, the surface of the cover plate body 21 facing the battery cell 200). Thus, the first limiting portion 222 and the second limiting portion 223 respectively abut against the two surfaces of the cover plate body 21, realizing a stable fit between the pole post 22 and the cover plate body 21.

[0100] Furthermore, the sealing component 23 enhances the sealing and insulation performance of the overall structure. Specifically, the insulating part 231 is divided into a first insulating section 2311 and a second insulating section 2312. The first insulating section 2311 closely adheres between the first limiting part 222 and the outer surface of the cover body 21, effectively blocking the potential influence of the external environment on the pole column 22 and improving the electrical safety of the overall structure. The second insulating section 2312 abuts against the gap between the connecting part 224 and the inner wall of the perforation 211, preventing the risk of current leakage or short circuit.

[0101] It should be noted that by setting the seal 232, the sealing performance of the overall structure is further improved. The first sealing section 2321 closely adheres between the second limiting part 223 and the inner surface of the cover body 21, forming a sealing barrier. The second sealing section 2322 and the second insulating section 2312 jointly act on the gap between the connecting part 224 and the inner wall of the perforation 211, forming a double sealing barrier, further enhancing the sealing effect and durability of the overall structure.

[0102] See Figure 2 and Figure 10 In some embodiments, the sealing component 23 further includes: a reinforcing member 233, which is clamped between the first insulating section 2311 and the first limiting part 222. And / or, an insulating spacer 234, which is located between the second limiting part 223 and the inner surface of the cover body 21.

[0103] It should be noted that the reinforcing member 233 further enhances the structural stability. The reinforcing member 233 is clamped between the first insulating section 2311 and the first limiting part 222, forming a solid support layer. The bottom of the reinforcing member 233 has a pit to cooperate with the insulating part 231 to improve the torsional strength of the pole column 22.

[0104] On the other hand, the insulating spacer 234 is located between the second limiting part 223 and the inner surface of the cover body 21, providing an additional insulating barrier, ensuring an appropriate gap between the second limiting part 223 and the cover 21, and avoiding the possible risk of friction or short circuit. The presence of the insulating spacer 234 further improves the electrical safety of the overall structure.

[0105] In some embodiments, the reinforcing member 233 is an aluminum block. And / or, the insulating part 231 is a plastic part. And / or, the seal 232 is a plastic part.

[0106] In some embodiments, the reinforcing member 233 can be formed by stamping aluminum. The aluminum block has good thermal conductivity, which helps to conduct the heat generated inside the structure out and maintain the thermal stability of the overall structure. In addition, the aluminum material can be selected from 1-series aluminum or other series of aluminum materials, which are not limited in this embodiment.

[0107] Among them, the insulating member 231 can be an insulating member made of PPS (Polyphenylene Sulfide). PPS has high temperature resistance, chemical corrosion resistance, and excellent electrical insulation performance. Thus, by using PPS, the insulation performance of the insulating member 231 can be ensured to be stable and reliable, thereby protecting the structure from electrical faults. In addition, the insulating member 231 can also include other materials with insulating properties, which are not limited in this embodiment.

[0108] Furthermore, the sealing member 232 can be a sealing member made of at least one of FKM (Fluororubber) and EPDM (Ethylene Propylene Diene Monomer). Of course, the sealing member 232 can also include other materials with sealing properties, which are not limited in this embodiment.

[0109] In some embodiments, referring to Figure 12 , the cover plate assembly 2 further includes a sealing cover 24 and a sealing nail 25. The inside of the pole column 22 has a liquid injection groove 220. The liquid injection hole 221 communicates the liquid injection groove 220 and the inner cavity 14. The sealing nail 25 closes the liquid injection hole 221, and the sealing cover 24 is connected to the pole column 22 and closes the liquid injection groove 220. It can be understood that by providing the liquid injection groove 220 on the pole column 22, during liquid injection, the electrolyte can first enter the relatively large liquid injection groove 220 and then enter the inner cavity 14 of the housing 1 through the liquid injection hole 221 on the bottom wall of the liquid injection groove 220. Compared with directly injecting the electrolyte through the liquid injection hole 221, it can prevent the electrolyte from spilling and splashing. After the liquid injection is completed, the liquid injection hole 221 can be closed by the sealing nail 25, and the liquid injection groove 220 can be closed by the sealing cover 24, thereby ensuring the overall sealing performance of the battery 100.

[0110] Next, the electrical equipment of the third aspect embodiment of the present application will be described.

[0111] The electrical equipment of this embodiment can be a vehicle (such as a new energy vehicle, a pure electric vehicle, or a hybrid vehicle), a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, and an electric tool, etc., which are not limited in the embodiments of the present application.

[0112] The electrical equipment of this embodiment includes the battery 100 in the above embodiment. The electrical equipment can include a battery compartment, and the battery 100 is arranged in the battery compartment and is electrically connected to the electrical equipment.

[0113] In this specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0114] It should be noted that the embodiments referred to in the specification as "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when describing a specific feature, structure, or characteristic in connection with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure, or characteristic in connection with other embodiments, whether explicitly or implicitly described.

[0115] In general, terms should be understood at least in part in light of their use in the context. For example, at least in part depending on the context, the term "one or more" used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Similarly, at least in part depending on the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.

[0116] It should be readily understood that the terms "on", "above", and "over" in this disclosure should be interpreted in the broadest possible manner such that "on" not only means "directly on something", but also includes the meaning of "on something" with intervening features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but can also include the meaning of "above" or "over something" with no intervening features or layers therebetween (i.e., directly on something).

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A housing (1) for a battery (100), characterized in that, The housing (1) has an inner cavity (14). One axial end of the housing (1) has an opening (13). The housing (1) includes a first housing body (11) and a second housing body (12) distributed along the axis. The second housing body (12) is provided with the opening (13), and the inner ring area of the second housing body (12) is larger than the inner ring area of the first housing body (11).

2. The housing (1) according to claim 1, characterized in that, The outer walls of the first housing body (11) and the second housing body (12) are flush, and the wall thickness of the first housing body (11) is greater than the wall thickness of the second housing body (12).

3. The housing (1) according to claim 2, characterized in that, The second housing body (12) includes a first end (121) axially away from the first housing body (11) and a second end (122) close to the first housing body (11); Axially and in the direction from the first end (121) towards the second end (122), the wall thickness of the second housing body (12) gradually increases, and the second end (122) is connected to the first housing body (11).

4. The housing (1) according to claim 2, characterized in that, The wall thicknesses of the first housing body (11) at different positions in the axial direction are equal, and the wall thicknesses of the second housing body (12) at different positions in the axial direction are equal.

5. The housing (1) according to claim 4, characterized in that, The connection between the first housing body (11) and the second housing body (12) has a circular arc transition.

6. The housing (1) according to claim 4, characterized in that, The wall thickness of the first housing body (11) is d1, and the wall thickness of the second housing body (12) is d2. The d1 and the d2 satisfy: d1 = d2 + a, where the value range of a is 0.03 mm - 1 mm.

7. The housing (1) according to claim 6, characterized in that, The value range of a is 0.2 mm - 0.5 mm.

8. The housing (1) according to claim 6, characterized in that, The value range of d2 is: 0.1 mm - 1 mm.

9. The housing (1) according to claim 8, characterized in that, The value range of d2 is: 0.3 mm - 0.5 mm.

10. The housing (1) according to claim 1, characterized in that, Both axial ends of the housing (1) have the opening (13). The number of the second housing bodies (12) is two. The two second housing bodies (12) are respectively connected to both sides of the first housing body (11) along the axis, and each end of the second housing body (12) away from the first housing body (11) is provided with the opening (13).

11. The housing (1) according to claim 10, characterized in that, The axial length of the housing (1) is L; The axial lengths of the two second housing bodies (12) are both L1, and the L1 and the L satisfy: L1 = (0.01 - 0.5)L.

12. The housing (1) according to claim 11, characterized in that, The L1 and the L satisfy: L1 = (0.07 - 0.4)L.

13. The housing (1) according to claim 11, characterized in that, The value range of L is: L ≥ 70 mm.

14. The housing (1) according to claim 10, characterized in that, The axial lengths of the two second housing bodies (12) are different.

15. The housing (1) according to claim 1, characterized in that, Both axial ends of the housing (1) have the opening (13), and the ends of the first housing body (11) and the second housing body (12) facing away from each other are both provided with the opening (13).

16. The housing (1) according to any one of claims 1-15, characterized in that, The housing (1) is configured in a cylindrical shape, and the inner diameter of the second housing body (12) is larger than the inner diameter of the first housing body (11).

17. The housing (1) according to any one of claims 1 to 15, characterized in that, The housing (1) is at least one of an aluminum structural member and a steel structural member.

18. A battery (100), characterized in that, It includes a battery cell (200), a cover plate assembly (2), and a housing (1) according to any one of claims 1-17. The battery cell (200) is located in the inner cavity (14) of the housing (1), the cover plate assembly covers the opening (13), the cover plate assembly (2) is provided with a liquid injection hole (221), and the liquid injection hole (221) communicates with the inner cavity (14).

19. The battery (100) according to claim 18, characterized in that, The cover plate assembly (2) includes: a cover plate body (21), a pole column (22), and a sealing assembly (23). The cover plate body (21) covers the opening (13), the pole column (22) penetrates through the cover plate body (21), the liquid injection hole (221) is formed in the pole column (22), and the sealing assembly (23) is used to separate the pole column (22) from the cover plate body (21).

20. The battery (100) according to claim 19, characterized in that, The pole column (22) includes a first limiting portion (222), a second limiting portion (223), and a connecting portion (224). The connecting portion (224) penetrates through a through hole (211) formed in the cover plate body (21), and the first limiting portion (222) and the second limiting portion (223) are respectively located at both ends of the connecting portion (224); The sealing assembly (23) includes an insulating member (231) and a sealing member (232), The insulating member (231) includes a first insulating section (2311) and a second insulating section (2312). The first insulating section (2311) is located between the first limiting portion (222) and the outer surface of the cover plate body (21), and the second insulating section (2312) is located between the connecting portion (224) and the inner wall of the through hole (211); The sealing member (232) includes a first sealing section (2321) and a second sealing section (2322). The first sealing section (2321) is located between the second limiting portion (223) and the inner surface of the cover plate body (21), and the second sealing section (2322) is located between the connecting portion (224) and the inner wall of the through hole (211).

21. The battery (100) according to claim 20, characterized in that, The sealing assembly (23) further includes: a reinforcing member (233) which is clamped between the first insulating section (2311) and the first limiting portion (222); and / or, an insulating spacer (234) which is located between the second limiting portion (223) and the inner surface of the cover plate body (21).

22. The battery (100) according to claim 21, characterized in that, The reinforcing member (233) is an aluminum block; and / or, the insulating member (231) is a plastic part; and / or, the sealing member (232) is a plastic part.

23. The battery (100) according to any one of claims 19-22, characterized in that, The cover plate assembly (2) further includes a sealing cover (24) and a sealing nail (25). The pole column (22) has a liquid injection groove (220) inside. The liquid injection hole (221) communicates the liquid injection groove (220) with the inner cavity (14). The sealing nail (25) closes the liquid injection hole (221), and the sealing cover (24) is connected to the pole column (22) and closes the liquid injection groove (220).

24. An electrical device, characterized in that, It includes a battery (100) according to any one of claims 18-23.

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