Battery casing, battery, battery pack and electrical device

Abstract

A battery casing, a battery, a battery pack, and an electrical device. The battery casing comprises a casing, a support frame and a sealing member. The casing comprises a casing body and an extension portion, the casing body being formed with an accommodation space and being provided with an opening, and the extension portion being connected to the casing body and extending from the opening towards the accommodation space. The support frame is arranged in the accommodation space, and at least part of the support frame is sleeved on the extension portion and abuts against the extension portion. The sealing member is mounted on the extension portion through the opening, and the sealing member is pressed by the extension portion and elastically deformed, so as to sealingly cooperate with the extension portion.

Description

Battery shell, battery, battery pack and electric device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202421929065.X, filed on August 8, 2024, and entitled "Battery shell, battery, battery pack and electric device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, in particular, to a battery shell, a battery, a battery pack and an electric device. BACKGROUND

[0004] In order to facilitate the injection of electrolyte into the battery, an opening structure is formed on the shell of the battery. At present, in order to improve the volume energy density of the battery, the thickness of the battery shell is becoming thinner and thinner, which leads to the fact that the opening structure punched is also relatively thin, and the sealing effect of the sealing member installed in the opening cannot be guaranteed. SUMMARY

[0005] The purpose of the present disclosure is to provide a battery shell, a battery, a battery pack and an electric device, which can ensure the sealing effect of the sealing member on the opening.

[0006] In order to achieve the above-mentioned purpose, according to a first aspect of the present disclosure, a battery shell is provided, which comprises a shell, a support frame and a sealing member, the shell comprises a shell body and an extension, the shell body is formed with an accommodation space and is provided with an opening, the extension is connected to the shell body, and the extension extends from the opening towards the accommodation space, the support frame is arranged in the accommodation space, at least a part of the support frame is sleeved on the extension, and the support frame abuts against the extension, the sealing member is installed on the extension through the opening, and the sealing member is elastically deformed by being extruded by the extension to sealingly cooperate with the extension.

[0007] Optionally, the battery shell comprises a terminal assembly, the shell body is provided with a terminal mounting portion for mounting the terminal assembly, the terminal mounting portion is arranged at a position spaced apart from the opening, the terminal assembly comprises an insulating frame, the insulating frame is arranged in the accommodation space and connected to the shell body, and the support frame is connected to the insulating frame.

[0008] Optionally, the support frame and the insulating frame are connected in a plug-in manner.

[0009] Optionally, the support frame comprises a frame body and a split piece, the frame body is provided with an avoiding opening, the frame body is connected to the insulating frame in a first direction by means of a plug-in connection, the extension part extends into the avoiding opening in the first direction, and the split piece is connected to the frame body and forms a sleeving hole for sleeving the extension part together with the frame body, the first direction being perpendicular to the extension direction of the extension part.

[0010] Optionally, the frame body and the insulating frame are connected by means of a plug-in structure, the plug-in structure comprises a plug-in groove and a plug-in block matched with each other, the plug-in groove extends in the first direction, and one of the frame body and the insulating frame is provided with the plug-in groove and the other is provided with the plug-in block.

[0011] Optionally, the split piece is connected to the frame body by means of a clamping structure, the clamping structure comprises a clamping groove and a clamping block matched with each other, one of the split piece and the frame body is provided with the clamping groove and the other is provided with the clamping block.

[0012] Optionally, the frame body comprises a first boss extending away from the terminal assembly, the first boss is formed with a first arc surface, an end surface of the first boss in the first direction is formed with the clamping groove, the split piece comprises a second boss formed with a second arc surface and the clamping block, the clamping block is clamped in the clamping groove, and the first arc surface and the second arc surface are matched to form an inner wall surface of the sleeving hole.

[0013] Optionally, the frame body comprises a first support surface extending away from the terminal assembly, the first support surface is connected to an end surface of the first boss, the split piece comprises a connecting flange connected to the second boss and protruding outward in a radial direction of the second boss, the connecting flange is formed with a second support surface extending from an edge of the connecting flange to an end surface of the second boss, and the extension part comprises a support section extending from the shell body to the accommodating space and supported by the first support surface and the second support surface.

[0014] Optionally, the extension part further comprises a connecting section and a matching section, the connecting section is connected between the support section and the matching section and overlapped on the first boss and the second boss, and the matching section extends from the connecting section to the accommodating space, the first arc surface and the second arc surface jointly surround the matching section.

[0015] Optionally, an inner diameter of the sleeve hole is K, a diameter of the sealing member is d, a wall thickness of the extension is T, and a gap between the first or second arc surface and the fitting section is L, and [d / (K-2T-2L)]≥1.1.

[0016] Optionally, the gap L between the first or second arc surface and the fitting section is greater than or equal to 0.05 mm.

[0017] Optionally, the gap L between the first or second arc surface and the fitting section is equal to 0.10 mm.

[0018] Optionally, the battery shell further comprises a sealing cover, which covers the opening and is sealingly connected with the shell body.

[0019] According to a second aspect of the present disclosure, a battery is provided, which comprises the above-mentioned battery shell.

[0020] According to a third aspect of the present disclosure, a battery pack is provided, which comprises the above-mentioned battery.

[0021] According to a fourth aspect of the present disclosure, an electrical equipment is provided, which comprises the above-mentioned battery or the above-mentioned battery pack.

[0022] Through the above technical solution, the shell body is formed with an accommodation space and is provided with an opening, so that electrolyte can be injected into the accommodation space through the opening. In addition, the extension extends from the opening towards the accommodation space, at least a part of the support frame is sleeved on the extension, and the support frame abuts against the extension. The sealing member is elastically deformed by being extruded by the extension. In this way, the support frame can abut against the outside of the extension to strengthen the structural strength of the extension, so as to ensure that the extension can sufficiently extrude the sealing member to make the sealing member elastically deform, thereby ensuring the sealing effect of the sealing member on the opening and the extension.

[0023] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, which together with the following detailed description, serve to explain the present disclosure. In the drawings:

[0025] FIG. 1 is a structural diagram of a battery shell according to an exemplary embodiment of the present disclosure;

[0026] FIG. 2 is a partial schematic diagram of a battery shell according to an exemplary embodiment of the present disclosure;

[0027] Fig. 3 is a schematic view of a connection between a terminal assembly and a support frame according to an exemplary embodiment of the present disclosure;

[0028] Fig. 4 is an enlarged view of A in Fig. 3;

[0029] Fig. 5 is a structural view of a support frame according to an exemplary embodiment of the present disclosure;

[0030] Fig. 6 is a structural view of a frame body according to an exemplary embodiment of the present disclosure;

[0031] Fig. 7 is an enlarged view of B in Fig. 6;

[0032] Fig. 8 is a structural view of a split member according to an exemplary embodiment of the present disclosure;

[0033] Fig. 9 is a schematic view of an installation of a support frame, an extension, and a seal according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] A detailed description of the present disclosure will be made hereinafter with reference to the accompanying drawings. It should be understood that the detailed description is merely intended to illustrate and explain the present disclosure, and is not intended to limit the present disclosure.

[0035] In the present disclosure, unless otherwise specified, the positional words such as "inner" and "outer" refer to "inner" and "outer" with respect to the own contour of the corresponding component, and the "first direction" refers to the L1 direction in the drawings. In addition, the terms "first", "second", and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequential or important meanings. Furthermore, in the following description, when referring to the drawings, the same reference numerals in different drawings indicate the same or similar elements unless otherwise explained. The above definition is only for the explanation and illustration of the present disclosure, and should not be understood as a limitation of the present disclosure.

[0036] According to a first aspect of the present disclosure, a battery case is provided, referring to Figs. 1, 2, and 9, the battery case includes a housing 100, a support frame 200, and a seal 310, the housing 100 includes a housing body and an extension 110, the housing body is formed with an accommodation space and is provided with an opening 120, the extension 110 is connected to the housing body, and the extension 110 extends from the opening 120 toward the accommodation space, the support frame 200 is arranged in the accommodation space, at least a portion of the support frame 200 is sleeved on the extension 110, and the support frame 200 abuts against the extension 110, the seal 310 is installed on the extension 110 through the opening 120, and the seal 310 is elastically deformed by being extruded by the extension 110 to sealingly cooperate with the extension 110.

[0037] According to the technical scheme, the shell body forms the accommodating space and is provided with the opening 120, so that the electrolyte can be injected into the accommodating space through the opening 120. In addition, the extension part 110 extends from the opening 120 towards the accommodating space, at least a part of the support frame 200 is sleeved on the extension part 110, and the support frame 200 abuts against the extension part 110. The sealing element 310 is elastically deformed by being extruded by the extension part 110. In this way, the support frame 200 can abut against the outer side of the extension part 110 to strengthen the structural strength of the extension part 110, so as to ensure that the extension part 110 can sufficiently extrude the sealing element 310 to make the sealing element 310 elastically deform, thereby ensuring the sealing effect of the sealing element 310 on the opening 120 and the extension part 110.

[0038] In the battery shell provided in the present disclosure, the support frame 200 can be installed in any suitable manner. As an exemplary embodiment, referring to Figs. 2-4, the battery shell can include a terminal assembly 400, and the shell body can be provided with a terminal mounting portion for mounting the terminal assembly 400. The terminal mounting portion can be arranged apart from the opening 120. The terminal assembly 400 can include an insulating frame 410, which can be arranged in the accommodating space and connected to the shell body. The support frame 200 can be connected to the insulating frame 410. In this way, the support frame 200 can be connected to the insulating frame 410, and the insulating frame 410 can be connected to the shell body. That is, the support frame 200 can be stably mounted on the shell body through the insulating frame 410, so as to ensure the position of the installed support frame 200 relative to the extension part 110 and the opening 120, thereby ensuring the supporting effect of the support frame 200 on the extension part 110. In addition, the terminal assembly 400 can be connected to the shell body through the terminal mounting portion, so as to simplify the parts (such as the cover plate) of the battery shell.

[0039] In the battery shell provided in the present disclosure, the support frame 200 and the insulating frame 410 can be connected in any suitable manner. As an exemplary embodiment, referring to Figs. 3 and 4, the support frame 200 and the insulating frame 410 can be connected in a plug-in manner.

[0040] In the battery shell provided in the present disclosure, the support frame 200 can be configured in any suitable manner. As an exemplary embodiment, referring to Figs. 4-6, the support frame 200 can include a frame body 210 and a split piece 220. The frame body 210 can be provided with a clearance 211. The frame body 210 can be connected to the insulating frame 410 in the first direction. The extension 110 can extend into the clearance 211 in the first direction. The split piece 220 can be connected to the frame body 210 and cooperates with the frame body 210 to form a sleeving hole for sleeving the extension 110. The first direction can be perpendicular to the extension direction of the extension 110. The extension 110 has a first side and a second side arranged opposite in the first direction. When installing the support frame 200, first, the frame body 210 is inserted into the insulating frame 410 in the first direction. In this process, the clearance 211 approaches the extension 110 in the first direction and surrounds the first side of the extension 110. Second, the split piece 220 is installed on the frame body 210 in the first direction. In this process, the split piece 220 can enter the clearance 211 in the first direction and surround the second side of the extension 110. In summary, the frame body 210 and the split piece 220 cooperates to form a sleeving hole for sleeving the extension 110. By providing the clearance 211, the movement interference between the frame body 210 and the extension 110 during installation of the frame body 210 can be avoided. In addition, by providing the split piece 220, the assembly of the support frame 200 can be facilitated.

[0041] In the battery shell provided in the present disclosure, the frame body 210 can be connected to the insulating frame 410 in any suitable manner. As an exemplary embodiment, referring to Figs. 3 and 4, the frame body 210 and the insulating frame 410 can be connected by a plug-in structure. The plug-in structure can include a plug-in groove and a plug-in block 212 that cooperate with each other. The plug-in groove can extend in the first direction. One of the frame body 210 and the insulating frame 410 can be provided with the plug-in groove, and the other can be provided with the plug-in block 212.

[0042] The plug-in groove and the plug-in block 212 can be arranged in any suitable manner. As an exemplary embodiment, referring to Figs. 3 and 4, the frame body 210 can be provided with the plug-in block 212, and the insulating frame 410 can be provided with the plug-in groove and form a gap with the shell body. The plug-in block 212 can be plugged into the plug-in groove and fit with the shell body. In this way, the assembly of the frame body 210 and the insulating frame 410 can be completed by plugging, which is simple to operate. It should be noted that when the insulating frame 410 is provided with the plug-in groove, a gap is formed between the insulating frame 410 and the shell body.

[0043] In the present disclosure, the number and position of the insertion slots can also be arranged in any suitable manner. As an exemplary embodiment, the number of the insertion slots can be two, and the two insertion slots can be arranged at opposite ends of the insulating frame 410 to make the insulating frame 410 in a T shape. In this way, when the frame body 210 is assembled on the insulating frame 410, the frame body 210 can be prevented from being detached from the insulating frame 410 in other directions perpendicular to the first direction, so as to ensure the stability of the frame body 210 after insertion, and further prevent the support frame 200 from being detached from the insulating frame 410 during vibration of the battery case.

[0044] In the battery case provided in the present disclosure, the split part 220 and the frame body 210 can be connected in any suitable manner. As an exemplary embodiment, referring to FIGS. 5-8, the split part 220 and the frame body 210 can be connected through a clamping structure, which can include a clamping groove and a clamping block 221 matched with each other. One of the split part 220 and the frame body 210 can be provided with the clamping groove, and the other can be provided with the clamping block 221. In this way, the assembly of the frame body 210 and the split part 220 can be completed through clamping, which is simple to operate. In other embodiments, the split part 220 and the frame body 210 can also be connected through other suitable manners, such as adhesion, or can be connected through clamping and adhesion, which are not limited in the present disclosure.

[0045] In the battery case provided in the present disclosure, the sleeve hole can be configured in any suitable manner. As an exemplary embodiment, referring to FIGS. 5-8, the frame body 210 can include a first boss 213 extending away from the terminal assembly 400, and the first boss 213 can be formed with a first arc surface 2131. An end surface of the first boss 213 in the first direction can be formed with a clamping groove. The split part 220 can include a second boss 222 formed with a second arc surface 2221 and a clamping block 221. The clamping block 221 can be clamped in the clamping groove. The first arc surface 2131 and the second arc surface 2221 can be spliced to form an inner wall surface of the sleeve hole. In this embodiment, at least part of the extension part 110 can be configured as a circular ring, and the first arc surface 2131 and the second arc surface 2221 can be symmetrical arc surfaces. In this way, after the first boss 213 and the second boss 222 are clamped and installed, the first arc surface 2131 and the second arc surface 2221 can respectively fit on both sides of the circular ring of the extension part 110 in the first direction, and the first boss 213 and the second boss 222 can respectively abut against both sides of the circular ring of the extension part 110 in the first direction, so as to enhance the structural strength of the extension part 110.

[0046] In this embodiment, the shapes of the clamping blocks 221 and the clamping slots can be configured in any suitable manner, such as a cylindrical shape, a triangular shape, etc., and the present disclosure does not make a specific limitation in this regard. In yet another embodiment, the rack body 210 can also be provided with clamping blocks 221, and the split member 220 can also be provided with clamping slots, and the present disclosure does not make a specific limitation in this regard.

[0047] In the present disclosure, the support rack 200 can be configured in any suitable material, and as an exemplary embodiment, the support rack 200 can be made of a PPS material with added glass fibers, and in another exemplary embodiment, the first boss 213 and the second boss 222 can be independently made of a metal material, and the rest of the rack body 210 can be made of a PPS material with added glass fibers, and then the first boss 213 is injection molded and installed on the rack body 210. In this way, the support effect of the support rack 200 on the extension 110 can be ensured.

[0048] In the battery shell provided by the present disclosure, in order to further improve the structural strength of the extension 110, as an exemplary embodiment, referring to FIGS. 5-9, the rack body 210 can include a first support surface 214, the first support surface 214 can extend away from the terminal assembly 400 from the rack body 210, and the first support surface 214 can be connected to the end surface of the first boss 213, the split member 220 can include a connecting flange, the connecting flange can be connected to the second boss 222, and the connecting flange can protrude radially outwardly along the second boss 222, the connecting flange can be formed with a second support surface 223, the second support surface 223 can extend obliquely from the edge of the connecting flange towards the end surface of the second boss 222, and the extension 110 can include a support section 111, the support section 111 can extend obliquely from the shell body towards the accommodation space, and at least part of the support section 111 can be supported by the first support surface 214 and the second support surface 223.

[0049] That is, the support section 111 can be arranged obliquely to the shell body, and at least part of the first support surface 214 and the second support surface 223 can be attached to one side of the support section 111 close to the accommodation space, so as to support the support section 111, and after the battery is filled with electrolyte, the equipment used to plug the sealing member 310 will abut against the support section 111, so as to facilitate the plugging of the sealing member 310 into the extension 110, and in this way, the first support surface 214 and the second support surface 223 can strengthen the structural strength of the support section 111, so as to prevent the support section 111 from being deformed by being pressed by the equipment. Among them, there can be gaps between part of the support section 111 and the first support surface 214, and between part of the support section 111 and the second support surface 223, so as to avoid movement interference between the support rack 200 and the shell body during assembly.

[0050] In the battery shell provided in the present disclosure, the extension part 110 can be configured in any suitable manner. As an exemplary embodiment, referring to FIG. 9, the extension part 110 can further include a connecting segment 112 and a matching segment 113. The connecting segment 112 can be connected between the supporting segment 111 and the matching segment 113, and can be lapped on the first boss 213 and the second boss 222. The matching segment 113 can extend from the connecting segment 112 towards the accommodating space, and the first arc surface 2131 and the second arc surface 2221 can jointly enclose the matching segment 113. That is, the end surfaces of the first boss 213 and the second boss 222 can abut against one side of the connecting segment 112 close to the accommodating space, so as to support the connecting segment 112 and strengthen the structural strength of the connecting segment 112. In this embodiment, the matching segment 113 can be configured as the above-mentioned ring and extend into the above-mentioned sleeve hole.

[0051] In the present disclosure, a chamfer can be arranged between the connecting segment 112 and the supporting segment 111, and between the connecting segment 112 and the matching segment 113, so as to ensure that the connecting segment 112 can be smoothly connected to the supporting segment 111 and the matching segment 113, respectively. In addition, the supporting segment 111, the connecting segment 112 and the matching segment 113 can jointly form a funnel-shaped extension part 110. The first supporting surface 214, the second supporting surface 223, the first boss 213 and the second boss 222 jointly form a structure matched with the funnel shape to support the extension part 110.

[0052] In summary, the first supporting surface 214 and the second supporting surface 223 can strengthen the structural strength of the supporting segment 111, and the first boss 213 and the second boss 222 can strengthen the structural strength of the connecting segment 112 and the matching segment 113.

[0053] In the battery shell provided in the present disclosure, in order to ensure the sealing effect of the sealing member 310, as an exemplary embodiment, referring to FIG. 9, the inner diameter of the sleeve hole can be K, the diameter of the sealing member 310 can be d, the wall thickness of the extension part 110 can be T, and the gap between the first arc surface 2131 or the second arc surface 2221 and the matching segment 113 can be L. [d / (K-2T-2L)]≥1.1, preferably [d / (K-2T-2L)]=1.2. In this way, the sealing effect of the sealing member 310 on the matching segment 113 can be ensured.

[0054] In the present disclosure, the gap L between the first arc surface 2131 or the second arc surface 2221 and the matching segment 113 can be greater than or equal to 0.05 mm. In this embodiment, the gap L can be 0.05 mm, 0.07 mm, 0.09 mm, etc., which are not specifically limited in the present disclosure.

[0055] Preferably, the gap L between the first arc surface 2131 or the second arc surface 2221 and the matching segment 113 can be equal to 0.10 mm.

[0056] In the battery shell provided in the present disclosure, in order to further ensure the sealing effect of the battery shell, as an exemplary embodiment, referring to FIG. 1, FIG. 2 and FIG. 9, the battery shell can further comprise a sealing cover 320, which can be arranged on the opening 120 and sealingly connected with the shell body. Wherein, the sealing cover 320 can be configured as a cap shape, and the cap edge of the sealing cover 320 can be fitted with the shell body, so that the sealing cover 320 can play a role of shielding the opening 120 and protecting the sealing member 310. In the present disclosure, the sealing cover 320 can be made of any suitable material, as an exemplary embodiment, the sealing cover 320 can be configured as a sealing aluminum nail, so as to ensure the structural strength of the sealing cover 320, and the sealing cover 320 can be installed by welding and the like, which is convenient for processing and can ensure the sealing effect of the sealing cover 320.

[0057] In the present disclosure, the shell 100 can be configured in any suitable manner, as an exemplary embodiment, referring to FIG. 1, the shell 100 can comprise a first shell 130 and a second shell 140, the first shell 130 can be configured as a plate shape, and the second shell 140 can be configured as a half-enclosed structure with an opening on one side. The opening side of the second shell 140 can have a flange edge extending away from the accommodation space, and the first shell 130 is arranged on the opening side of the second shell 140 to be welded with the flange edge by laser welding. Specifically, after the first shell 130 is overlapped with the flange edge, laser can be used to penetrate the flange edge from the first shell 130, so that the first shell 130 and the flange edge are welded together to seal the opening side of the second shell 140.

[0058] In the present disclosure, the second shell 140 can be configured in any suitable manner, as an exemplary embodiment, referring to FIG. 1, the side of the second shell 140 away from the first shell 130 can form an accommodation portion 141, and the accommodation portion 141 can be recessed towards the accommodation space. In this way, when the batteries are grouped, the accommodation portion 141 can be used to accommodate the terminal assembly 400 of the battery adjacent to the current battery, so as to improve the space utilization after the battery grouping.

[0059] In the present disclosure, in order to further improve the structural strength of the support frame 200, the support frame 200 can include a connecting frame body 230 and a support seat 240 connected to both ends of the connecting frame body 230, and the avoiding opening 211, the first boss 213 and the second boss 222 can be formed on one of the support seats 240. The support seat 240 can be configured as a hollow shell seat, and the support seat 240 can include a support plate 241 and a reinforcing structure, the support plate 241 is arranged in close contact with the first shell 130 for supporting the first shell 130, so that the first shell 130 can be prevented from being deformed by being pressed by the liquid injection nozzle during the battery liquid injection process. The reinforcing structure can include a first reinforcing rib 242 and a second reinforcing rib 243, and the first reinforcing rib 242 and the second reinforcing rib 243 can be arranged in a cross shape. In this way, not only the structural strength of the support frame 200 is improved, but also the weight of the support frame 200 is reduced, which is beneficial to the lightweight of the battery. In addition, the side of the connecting frame body 230 facing the accommodating space has an avoiding space for avoiding the tab adapter of the battery. In addition, there is a gap between the installed support frame 200 and the bottom surface of the second shell 140 to avoid assembly interference.

[0060] According to a second aspect of the present disclosure, a battery is provided, which includes the battery shell as described above.

[0061] According to a third aspect of the present disclosure, a battery pack is provided, which includes the battery as described above.

[0062] According to a fourth aspect of the present disclosure, a power consuming device is provided, which includes the battery as described above, or the power consuming device includes the battery pack as described above. In the present disclosure, the power consuming device can be any suitable power consuming device such as a mobile phone, a portable device, a notebook computer, a vehicle (such as a fuel vehicle, a gas vehicle or a new energy vehicle, etc.), and the like, and the present disclosure does not make specific limitations on this.

[0063] The battery shell provided by the present disclosure can inject the electrolyte into the inside of the battery shell from the opening 120 along the extension part 110 during the liquid injection process. After the liquid injection is completed, the sealing member 310 can extend into the extension part 110 and elastically deform under the extrusion of the extension part 110 to seal the extension part 110. In this process, the first support surface 214 and the second support surface 223 of the support frame 200 can abut against the outside of the extension part 110 to ensure the structural strength of the extension part 110, and further ensure the extrusion effect of the extension part 110 on the sealing member 310.

[0064] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0065] It should also be noted that any technically possible combination of the various technical features described in the above embodiments can be made, without contradiction. In order to avoid unnecessary repetition, the disclosure does not describe each possible combination of the various technical features.

[0066] Furthermore, any combination of the various different embodiments of the disclosure can also be made, as long as it does not contradict the idea of the disclosure, it should also be considered as disclosed by the disclosure.

Claims

1. A battery case characterized by comprising: The battery case comprises: a housing (100), the housing (100) comprising a housing main body formed with an accommodation space and provided with an opening (120), and an extension (110) connected to the housing main body and extending from the opening (120) towards the accommodation space, a support frame (200) arranged in the accommodation space, at least a portion of the support frame (200) being sleeved on the extension (110) and the support frame (200) being in abutment with the extension (110), and a sealing member (310) mounted on the extension (110) through the opening (120) and elastically deformed by being pressed by the extension (110) to sealingly cooperate with the extension (110).

2. The battery case according to claim 1, wherein The battery case comprises a terminal assembly (400), the housing main body is provided with a terminal mounting portion for mounting the terminal assembly (400), the terminal mounting portion is arranged in a spaced manner with the opening (120), the terminal assembly (400) comprises an insulating frame (410) arranged in the accommodation space and connected to the housing main body, and the support frame (200) is connected to the insulating frame (410).

3. The battery case according to claim 2, characterized by The support frame (200) is connected to the insulating frame (410) in a plug-in manner.

4. The battery case according to claim 3, characterized by The support frame (200) comprises a frame main body (210) and a split member (220), the frame main body (210) is provided with a relief opening (211), the frame main body (210) is connected to the insulating frame (410) in a plug-in manner along a first direction, the extension (110) extends into the relief opening (211) along the first direction, the split member (220) is connected to the frame main body (210) and cooperates with the frame main body (210) to form a sleeving hole sleeving the extension (110), and the first direction is perpendicular to an extension direction of the extension (110).

5. The battery case according to claim 4, characterized by The frame main body (210) is connected to the insulating frame (410) through a plug-in structure, the plug-in structure comprises a plug-in groove and a plug-in block (212) cooperating with each other, the plug-in groove extends along the first direction, and one of the frame main body (210) and the insulating frame (410) is provided with the plug-in groove and the other is provided with the plug-in block (212).

6. The battery housing of claim 4 or 5, wherein, The split member (220) is connected to the frame main body (210) through a clamping structure, the clamping structure comprises a clamping groove and a clamping block (221) cooperating with each other, one of the split member (220) and the frame main body (210) is provided with the clamping groove and the other is provided with the clamping block (221).

7. The battery case of claim 6, wherein, The rack body (210) comprises a first boss (213) extending away from the terminal assembly (400), and the first boss (213) is formed with a first arc surface (2131), and an end surface of the first boss (213) in the first direction is formed with the clamping groove, The split piece (220) comprises a second boss (222) formed with a second arc surface (2221) and the clamping block (221), and the clamping block (221) is clamped in the clamping groove, and the first arc surface (2131) and the second arc surface (2221) are combined to form an inner wall surface of the sleeving hole.

8. The battery case of claim 7, wherein, The rack body (210) comprises a first support surface (214) extending away from the terminal assembly (400), and the first support surface (214) is connected with an end surface of the first boss (213), The split piece (220) comprises a connecting flange connected to the second boss (222) and protruding outward along a radial direction of the second boss (222), and the connecting flange is formed with a second support surface (223) extending from an edge of the connecting flange towards the end surface of the second boss (222), The extension (110) comprises a support section (111) extending obliquely from the shell body towards the containing space, and at least part of the support section (111) is supported on the first support surface (214) and the second support surface (223).

9. The battery case of claim 8, wherein, The extension (110) further comprises a connecting section (112) and a fitting section (113), the connecting section (112) is connected between the support section (111) and the fitting section (113), and the connecting section (112) is lapped on the first boss (213) and the second boss (222), the fitting section (113) extends from the connecting section (112) towards the containing space, and the first arc surface (2131) and the second arc surface (2221) jointly enclose the fitting section (113).

10. The battery case of claim 9, wherein, An inner diameter of the sleeving hole is K, a diameter of the sealing piece (310) is d, a wall thickness of the extension (110) is T, and a gap between the first arc surface (2131) or the second arc surface (2221) and the fitting section (113) is L, [d / (K-2T-2L)]≥1.

1.

11. The battery case of claim 10, wherein, The gap L between the first arc surface (2131) or the second arc surface (2221) and the fitting section (113) is greater than or equal to 0.05 mm.

12. The battery case of claim 11, wherein, The gap L between the first arc surface (2131) or the second arc surface (2221) and the fitting section (113) is equal to 0.10 mm.

13. The battery housing of any one of claims 1-12, wherein, The battery shell further comprises a sealing cover (320) which covers the opening (120) and is sealingly connected with the shell body.

14. A battery, characterized by The battery comprises the battery shell according to any one of claims 1-13.

15. A battery pack, characterized by The battery pack comprises the battery according to claim 14.

16. An electrical device, characterized by The electric device comprises the battery according to claim 14, or the electric device comprises the battery pack according to claim 15.

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