Battery shell and battery

Abstract

The battery shell comprises a shell body, a cover plate and a first sealing piece, the shell body comprises a bottom plate and a side plate, the side plate surrounds the edge of the bottom plate and forms an inner cavity with an opening, the area of the cover plate is larger than that of the opening, the cover plate is used for shielding the opening, and the edge of the cover plate is provided with an extending part extending towards the bottom plate; a plurality of first through holes and second through holes are respectively formed in the side plate and the extension part in a surrounding manner, and each first through hole is aligned with one second through hole so as to allow a bolt to pass through; the first sealing piece is fixed to the first surface of the side, facing the bottom plate, of the cover plate and surrounds the outer side of the opening, and the projection of the end, away from the bottom plate, of the side plate on the plane where the first sealing piece is located at least partially coincides with the first sealing piece. The sum of the distance between the axis of the first through hole and the end, away from the bottom plate, of the side plate and the thickness of the first sealing piece is larger than the distance between the first surface and the axis of the second through hole. The side plate of the battery shell is propped against the first sealing element so as to improve the sealing effect of the first sealing element.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery housings, in particular to a battery housing and a battery. BACKGROUND

[0002] In the existing battery housing, the sealing effect at the connection between the cover plate and the shell is not good, and it is difficult to achieve long-term effective waterproofing of the battery. CONTENT OF THE UTILITY MODEL

[0003] In view of the above-mentioned technical problems, the purpose of the present application is to provide a battery housing with good waterproof effect and a battery comprising the above-mentioned battery housing, specifically comprising the following technical solutions:

[0004] In a first aspect, the present application provides a battery housing comprising a shell, a cover plate and a first sealing member, the shell comprising a bottom plate and a side plate, the side plate being arranged around the edge of the bottom plate and forming an inner cavity with an opening, the area of the cover plate being larger than the area of the opening, the cover plate being used to shield the opening, the edge of the cover plate being provided with an extension part extending towards the bottom plate, the side plate and the extension part being respectively provided with a plurality of first through holes and a plurality of second through holes, each first through hole being aligned with one second through hole to allow a bolt to pass through; the first sealing member being fixed to the surface of the cover plate on the side facing the bottom plate and being arranged around the outside of the opening, the projection of the side plate away from the bottom plate on the plane of the first sealing member at least partially overlapping the first sealing member, the sum of the distance between the axis of the first through hole and the end of the side plate away from the bottom plate and the thickness of the first sealing member being greater than the distance between the first surface and the axis of the second through hole.

[0005] The side plate and the extension part of the battery housing of the present application are respectively provided with a plurality of first through holes and second through holes, the first through holes being aligned with the second through holes to allow a bolt to pass through, and the cover plate and the shell are fixedly connected by the bolt.

[0006] The sum of the distance between the axis of the first through hole and the end of the side plate away from the bottom plate and the thickness of the first sealing member of the battery housing of the present application is greater than the distance between the first surface and the axis of the second through hole, and after the bolt passes through the first through hole and the second through hole, the side plate abuts against the first sealing member and causes the first sealing member to partially deform, thereby improving the sealing effect between the cover plate and the shell.

[0007] In one embodiment, a gap is left between the side plate and the extension part in the planar direction of the bottom plate, the first sealing member comprising a first protruding part, the first protruding part being arranged around the outside of the side plate, the first protruding part extending towards the bottom plate and being used to at least partially fill the gap between the side plate and the extension part.

[0008] In the embodiment, the side plate is fixedly connected with the extension under the action of the bolt, the first protruding part of the first sealing member extends into and fills the gap between the side plate and the extension, the secondary sealing between the cover plate and the shell is realized, and the sealing effect of the battery shell is further improved.

[0009] In one embodiment, the side plate includes a first segment and a second segment in a direction perpendicular to the bottom plate, the second segment is used for connecting the bottom plate and the first segment, the thickness of the second segment is greater than the thickness of the first segment, and a bearing surface surrounding the first segment is formed on the side away from the bottom plate of the second segment.

[0010] In the embodiment, one end of the second segment forms a bearing surface, the bearing surface faces the extension, is used for limiting the relative position between the extension and the side plate in a direction perpendicular to the bottom plate, and further limits the deformation amount of the first sealing member, so that the first sealing member is prevented from being damaged due to an excessively large deformation amount.

[0011] In one embodiment, the battery shell includes a second sealing member, the second sealing member is fixed to the bearing surface, a projection of the extension on a plane where the second sealing member is located at least partially overlaps the second sealing member, and the sum of the distance between the axis of the second through hole and the end of the extension facing the bottom plate and the thickness of the second sealing member is greater than the distance between the bearing surface and the axis of the first through hole.

[0012] In the embodiment, after the bolt passes through the first through hole and the second through hole, the extension bears against the second sealing member and causes the second sealing member to be partially deformed, the sealing between the bearing surface and the extension is realized, and the sealing effect between the cover plate and the shell is further improved.

[0013] In one embodiment, a gap is left between the side plate and the extension in a planar direction of the bottom plate, the second sealing member includes a second protruding part, the second protruding part surrounds the inner side of the extension, and the second protruding part extends in a direction away from the bottom plate and is used for at least partially filling the gap between the side plate and the extension.

[0014] In the embodiment, the second protruding part of the second sealing member extends into and fills the gap between the side plate and the extension, the sealing between the bearing surface and the extension is realized, and the sealing effect of the battery shell is further improved.

[0015] In one embodiment, a gap is left between the side plate and the extension in a planar direction of the bottom plate, the battery shell includes a third sealing member, the third sealing member surrounds the outer surface of the side plate, and is used for at least partially filling the gap between the side plate and the extension.

[0016] In the embodiment, the third sealing member fills the gap between the side plate and the extension, so that the sealing effect between the cover plate and the shell is improved.

[0017] In an embodiment, the battery shell comprises a bolt and a sealing nut, the sealing nut is fixed to the side plate away from the extension and corresponds to the first through hole, the bolt is used to pass through the second through hole and the first through hole and engage with the sealing nut, and the bolt and the sealing nut engaged with each other are used to shield and seal the first through hole and the second through hole.

[0018] In the embodiment, the side plate is provided with the sealing nut, and the sealing nut and the bolt engaged with each other can seal the first through hole and the second through hole, so as to avoid the gap between the bolt and the first through hole and the gap between the bolt and the second through hole from affecting the sealing effect of the battery shell.

[0019] In an embodiment, the sealing nut comprises a sealing sleeve, the sealing sleeve surrounds the inner wall of the threaded hole arranged in the sealing nut, and is used to at least partially fill the thread gap between the bolt and the threaded hole.

[0020] In the embodiment, the sealing sleeve of the sealing nut fills the gap between the bolt and the threaded hole, so as to avoid affecting the sealing effect of the battery shell.

[0021] In an embodiment, the cover plate is provided with a mounting hole, and the first sealing member is provided with a hollow area for exposing the mounting hole, wherein the battery shell comprises a transmission terminal, the transmission terminal passes through the mounting hole and extends into the inner cavity, the transmission terminal is provided with a sealing glue on the side facing the inner cavity, and the sealing glue is used to fix the transmission terminal and fill the gap between the mounting hole and the transmission terminal.

[0022] In the embodiment, the mounting hole is located in the hollow area of the first sealing member, which can reduce the influence of the transmission terminal mounted in the mounting hole on the sealed connection between the cover plate and the shell; at the same time, the cover plate is provided with the sealing glue, and the gap between the transmission terminal and the mounting hole is sealed by the sealing glue, so as to avoid the influence of the transmission terminal on the sealing effect of the battery shell.

[0023] In a second aspect, the embodiments of the present application also provide a battery, which comprises a battery shell and a battery cell assembly, and the battery shell is as described above.

[0024] It can be understood that the battery of the present application can protect the battery cell assembly in the inner cavity due to the use of the battery shell of the present application, has better sealing performance and is suitable for more scenes. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a schematic diagram of the exploded structure of the battery provided in an embodiment of the present application;

[0026] Figure 2 FIG. 2 is a schematic diagram of the structure of the battery provided in an embodiment of the present application;

[0027] Figure 3 FIG. 3 is a schematic diagram of the structure of the shell provided in an embodiment of the present application;

[0028] Figure 4 A partial structure diagram of a battery shell according to an embodiment of the present application;

[0029] Figure 5 A partial cross-sectional diagram of a battery shell according to a first embodiment of the present application;

[0030] Figure 6 A partial cross-sectional diagram of a battery shell according to a second embodiment of the present application;

[0031] Figure 7 A partial cross-sectional diagram of a battery shell according to a third embodiment of the present application;

[0032] Figure 8 A partial cross-sectional diagram of a battery shell according to a fourth embodiment of the present application;

[0033] Figure 9 A partial cross-sectional diagram of a battery shell according to a fifth embodiment of the present application;

[0034] Figure 10 A partial cross-sectional diagram of a battery shell according to a sixth embodiment of the present application;

[0035] Figure 11 A partial cross-sectional diagram of a battery shell according to a seventh embodiment of the present application;

[0036] Figure 12 A partial structure diagram of a battery shell according to an embodiment of the present application from a certain perspective;

[0037] Figure 13 A partial structure diagram of a battery shell according to an embodiment of the present application from another perspective;

[0038] Figure 14 A partial exploded structure diagram of a battery shell according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present application, a more comprehensive description of the present application will be given below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0040] The following description of the embodiments is provided as an example to illustrate the specific embodiments that can be used to implement the present application. The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. The "connection" and "coupling" mentioned in this paper include direct and indirect connections (couplings) unless otherwise specified. The direction terms mentioned in this paper, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc. are only the direction of the attached drawings, so the direction terms used are for better and clearer illustration and understanding of this application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on this application.

[0041] Please refer to Figures 1-3 , wherein, Figure 1 a decomposition structure diagram of the battery 200 provided in an embodiment of the present application is shown; Figure 2 a structure diagram of the battery 200 provided in an embodiment of the present application is shown; Figure 3 a structure diagram of the shell 10 provided in an embodiment of the present application is shown.

[0042] The present application provides a battery shell 100, which comprises a shell 10, a cover plate 20 and a first sealing member 31, the shell 10 comprises a bottom plate 11 and a side plate 12, the side plate 12 is arranged around the edge of the bottom plate 11 and forms an inner cavity 132 with an opening 131, the area of the cover plate 20 is greater than that of the opening 131, the cover plate 20 is used to shield the opening 131, and the edge of the cover plate 20 is provided with an extension 21 extending towards the bottom plate 11.

[0043] Specifically, in an embodiment, as Figure 3 shown, the bottom plate 11 is quadrilateral, the four edges of the bottom plate 11 are fixed with the side plate 12, and the plane where the side plate 12 is located is perpendicular to the bottom plate 11. Please refer to Figure 1 , the bottom plate 11 and the surrounding side plate 12 form an inner cavity 132 with an opening 131, and the inner cavity 132 contains a battery cell assembly 110.

[0044] The side plate 12 and the extension 21 of the battery shell 100 of the present application are respectively arranged with a plurality of first through holes 123 and a plurality of second through holes 211, each first through hole 123 is aligned with a second through hole 211 to allow the bolt 41 to pass through.

[0045] Specifically, in Figure 1 and Figure 2In the provided battery casing 100, the side plate 12 includes a plurality of first through holes 123, which are spaced apart along the edge of the opening 131. The extension 21 is provided with a plurality of second through holes 211, each of which is aligned with a first through hole 123 to allow bolts 41 to pass through the second through holes 211 and the first through holes 123 in sequence. The bolts 41 are used to pass through the second through holes 211 and the first through holes 123 to fix the side plate 12 and the extension 21, thereby achieving a fixed connection between the casing 10 and the cover plate 20.

[0046] Please see Figure 4 This is a schematic diagram of a portion of the structure of a battery casing 100 provided in one embodiment of this application.

[0047] The first sealing member 31 of the battery casing 100 of this application is fixed to the first surface 201 of the cover plate 20 facing the bottom plate and surrounds the outside of the opening 131. The projection of the side plate 12 away from the bottom plate 11 on the plane where the first sealing member 31 is located at least partially coincides with the first sealing member 31. The sum of the distance between the axis of the first through hole 123 and the end of the side plate 12 away from the bottom plate 11 and the thickness of the first sealing member 31 is greater than the distance between the first surface 201 and the axis of the second through hole 211.

[0048] Specifically, in one embodiment, such as Figure 4 As shown, the first seal 31 is disposed on the first surface 201. The projection of the side plate 12 away from the bottom plate 11 on the plane where the first seal 31 is located is located within the first seal 31. When the bolt 41 passes through the second through hole 211 and the first through hole 123 to fix the housing 10 and the cover plate 20, the first seal 31 can cover the outline of the opening 131 and eliminate the gap between the side plate 12 and the first surface 201, ensuring the sealing effect between the cover plate 20 and the housing 10.

[0049] In addition, Figure 4 In the provided battery casing 100, the sum of the distance between the axis of the first through hole 123 and the end of the side plate 12 away from the bottom plate 11 and the thickness of the first seal 31 is greater than the distance between the axis of the first surface 201 and the second through hole 211. After the bolt 41 passes through the first through hole 123 and the second through hole 211, the side plate 12 abuts against the first seal 31 and causes the first seal 31 to undergo partial deformation, further improving the sealing effect between the cover plate 20 and the casing 10.

[0050] The side plate 12 and extension 21 of the battery casing 100 of this application are respectively provided with a plurality of first through holes 123 and second through holes 211. The first through holes 123 and the second through holes 211 are aligned to allow bolts 41 to pass through, and the cover plate 20 is fixedly connected to the housing 10 by bolts 41.

[0051] During transportation, installation and use, water, dust and other substances from outside may enter the cavity containing the battery cell assembly, corrode or damage the internal components of the battery, affect the normal operation of the battery, and reduce the service life and stability of the battery. Therefore, a battery shell with good sealing effect is needed to prevent external substances from entering the battery.

[0052] The sum of the distance between the axis of the first through hole 123 of the battery shell 100 and the end of the side plate 12 away from the bottom plate 11 and the thickness of the first sealing member 31 is greater than the distance between the first surface 201 and the axis of the second through hole 211. After the bolt 41 passes through the first through hole 123 and the second through hole 211, the side plate 12 abuts against the first sealing member 31 and causes partial deformation of the first sealing member 31, thereby improving the sealing effect between the cover plate 20 and the shell 10.

[0053] The application also provides a battery 200, which comprises a battery cell assembly 110 and the battery shell 100 described above, and the battery cell assembly 110 is arranged in the inner cavity 132 of the battery shell 100.

[0054] It can be understood that the battery shell 100 of the application is provided with the first sealing member 31, and the side plate 12 abuts against the first sealing member 31 and causes partial deformation of the first sealing member 31, which can seal the inner cavity 132 and improve the sealing effect between the shell 10 and the cover plate 20, thereby preventing dust, liquid and other substances from outside from entering the inner cavity 132 and affecting the normal operation of the battery cell assembly 110.

[0055] It should be noted that the battery shell 100 of the application can not only be applied to the battery 200, but also be applied to other devices or systems that need to be sealed, and has better sealing effect.

[0056] Please refer to Figure 5 The partial cross-sectional view of the battery shell 100 provided in the first embodiment of the application is shown schematically.

[0057] In one embodiment, the battery shell 100 comprises a bolt 41 and a sealing nut 42, the sealing nut 42 is fixed to the side plate 12 away from the extension 21 and corresponds to the first through hole 123, and the bolt 41 is used to pass through the second through hole 211 and the first through hole 123 and engage with the sealing nut 42. The bolt and the sealing nut 42 engaged with each other are used to shield and seal the first through hole 123 and the second through hole 211.

[0058] In one embodiment, as Figure 5As shown, the side plate 12 is provided with a sealing nut 42, which, after being engaged with the bolt 41, can seal the first through hole 123 and the second through hole 211, and fill the gap between the bolt 41 and the first through hole 123 and the gap between the bolt 41 and the second through hole 211, thereby ensuring the sealing effect of the battery case 100.

[0059] In an embodiment, the sealing nut 42 comprises a sealing sleeve, which surrounds the inner wall of the threaded hole of the sealing nut 42, and is used to at least partially fill the threaded gap between the bolt 41 and the threaded hole. The sealing sleeve of the sealing nut 42 fills the gap between the bolt and the threaded hole, thereby ensuring the sealing effect of the battery case 100.

[0060] Please refer to Figure 6 The partial cross-sectional view of the battery case 100 provided in the second embodiment of the present application is shown.

[0061] In an embodiment, a gap is left between the side plate 12 and the extension 21 in the planar direction of the bottom plate 11, and the first sealing member 31 comprises a first protruding portion 311, which surrounds the outer side of the side plate 12 and extends towards the bottom plate 11, and is used to at least partially fill the gap between the side plate 12 and the extension 21.

[0062] In Figure 6 In the battery case 100 provided, the first sealing member 31 is located between the cover plate 20 and the side plate 12, and partially deforms in the planar direction perpendicular to the bottom plate 11 to achieve the sealing between the cover plate 20 and the side plate 12. The first sealing member 31 is provided with a first protruding portion 311, which extends towards the bottom plate 11 and surrounds the outer side of the side plate 12. After the bolt 41 and the sealing nut 42 are engaged with each other, the first protruding portion 311 is located between the side plate 12 and the extension 21 to fill the gap between the side plate 12 and the extension 21, thereby improving the sealing effect between the cover plate 20 and the case 10.

[0063] It can be understood that adjusting the engagement degree of the bolt 41 and the sealing nut 42 can change the relative position of the two. When the pre-tightening force of the bolt 41 and the sealing nut 42 is large, one of the side plate 12 and the extension 21 deforms to change the size of the gap between the side plate 12 and the extension 21.

[0064] Furthermore, in some embodiments, the engagement degree of the bolt 41 and the sealing nut 42 is adjusted to deform one of the side plate 12 and the extension 21, so as to reduce the distance between the side plate 12 and the extension 21 in the planar direction of the bottom plate 11, so that the first protruding portion 311 deforms, further improving the sealing effect between the side plate 12 and the extension 21.

[0065] Please refer to Figure 7A schematic diagram of a partial cross-section of a battery case 100 according to a third embodiment of the present application.

[0066] In one embodiment, the side plate 12 comprises a first section 121 and a second section 122 in a direction perpendicular to the bottom plate 11, the second section 122 is used to connect the bottom plate 11 and the first section 121, the thickness of the second section 122 is greater than that of the first section 121, and the second section 122 forms a bearing surface 1221 surrounding the first section 121 away from the bottom plate 11.

[0067] The bearing surface 1221 is used to limit the relative position of the extension 21 and the side plate 12, thereby limiting the deformation amount of the first seal 31, so as to avoid the first seal 31 being damaged due to the excessive deformation amount.

[0068] In one embodiment, the side plate 12 comprises a first section 121 and a second section 122 in a direction perpendicular to the bottom plate 11, the second section 122 is used to connect the bottom plate 11 and the first section 121, the thickness of the second section 122 is greater than that of the first section 121, and the second section 122 forms a bearing surface 1221 surrounding the first section 121 away from the bottom plate 11. Figure 7 In the battery case 100, a plurality of first through holes 123 are arranged around the first section 121, each second through hole 211 is aligned with a first through hole 123, at this time, the bearing surface 1221 and the extension 21 abut towards the bottom plate 11, and the first seal 31 reaches the maximum deformation amount.

[0069] In another embodiment, the bearing surface 1221 and the extension 21 are spaced apart from each other, that is, the sum of the distance between the bearing surface 1221 and the end of the first section 121 away from the bottom plate and the thickness of the first seal 31 is greater than the distance between the end of the extension 21 towards the bottom plate 11 and the first surface 201.

[0070] In other embodiments, the wall thickness of the first section 121 of the side plate 12 is equal to that of the second section 122, and the second section 122 is bent to form the bearing surface 1221 surrounding the first section 121, which can also limit the deformation amount of the first seal 31, so as to avoid the first seal 31 being damaged due to the excessive deformation amount.

[0071] Please refer to Figure 8 A schematic diagram of a partial cross-section of a battery case 100 according to a fourth embodiment of the present application.

[0072] In one embodiment, the battery case 100 comprises a second seal 32, the second seal 32 is fixed to the bearing surface 1221, the projection of the extension 21 on the plane where the second seal 32 is located at least partially overlaps the second seal 32, and the sum of the distance between the axis of the second through hole 211 and the end of the extension 21 towards the bottom plate 11 and the thickness of the second seal 32 is greater than the distance between the bearing surface 1221 and the axis of the first through hole 123.

[0073] In one embodiment, the battery case 100 comprises a second seal 32, the second seal 32 is fixed to the bearing surface 1221, the projection of the extension 21 on the plane where the second seal 32 is located at least partially overlaps the second seal 32, and the sum of the distance between the axis of the second through hole 211 and the end of the extension 21 towards the bottom plate 11 and the thickness of the second seal 32 is greater than the distance between the bearing surface 1221 and the axis of the first through hole 123. Figure 8The second sealing member 32 is fixed to the abutting surface 1221, and the extension portion 21 abuts against the second sealing member 32 and deforms the second sealing member 32. The second sealing member 32 between the abutting surface 1221 and the extension portion 21 can form a secondary seal between the shell 10 and the cover plate 20, thereby improving the sealing effect of the battery shell 100.

[0074] Referring to Figure 9 The battery shell 100 provided in the fifth embodiment of the present application is shown in a partial cross-sectional view.

[0075] In one embodiment, a gap is left between the extension portion 21 and the side plate 12 in the planar direction of the bottom plate 11. The second sealing member 32 includes a second protruding portion 321, which surrounds the inner side of the extension portion 21 and extends away from the bottom plate 11 to at least partially fill the gap between the side plate 12 and the extension portion 21. The second protruding portion 321 of the second sealing member 32 extends into and fills the gap between the side plate 12 and the extension portion 21, thereby improving the sealing effect between the abutting surface 1221 and the extension portion 21 and further improving the sealing effect of the battery shell 100.

[0076] In Figure 9 The first sealing member 31 includes a first protruding portion 311, and the second sealing member 32 includes a second protruding portion 321. The first protruding portion 311 and the second protruding portion 321 are configured to fill the gap between the side plate 12 and the extension portion 21, thereby improving the sealing effect between the cover plate 20 and the shell 10.

[0077] It should be noted that, in Figure 9 The first protruding portion 311 and the second protruding portion 321 of the battery shell 100 provided in the present application extend into the gap between the side plate 12 and the extension portion 21 and are spaced apart from the bolt 41. In other embodiments, the first protruding portion 311 can be in contact with the bolt 41 to improve the sealing effect of the battery shell 100. In other embodiments, one of the first protruding portion 311 and the second protruding portion 321 is provided with a through hole for passing the bolt 41, or a through hole is formed between the two ends of the first protruding portion 311 and the second protruding portion 321 for passing the bolt 41.

[0078] In addition, in some embodiments, the first protruding portion 311 and the second protruding portion 321 can be staggered along the outer circumferential surface of the side plate 12, which can also improve the sealing effect of the battery shell 100.

[0079] In one embodiment, the first protrusions 311 and the second protrusions 321 are arranged alternately along the outer circumferential surface of the side plate 12, one of the first protrusions 311 and the second protrusions 321 is provided with a through hole for passing through the bolt 41 and aligning with the bolt 41, and the other is arranged in the interval between two adjacent bolts 41, which can also improve the sealing effect of the battery case 100.

[0080] Referring to Figure 10 Fig. 6 shows a partial cross-sectional view of the battery case 100 according to the sixth embodiment of the present application.

[0081] In one embodiment, a gap is left between the side plate 12 and the extension 21 in the planar direction of the bottom plate 11, and the battery case 100 comprises a third sealing member 33, which is arranged around the outer surface of the side plate 12 and used to at least partially fill the gap between the side plate 12 and the extension 21, so as to improve the sealing effect between the cover plate 20 and the case 10.

[0082] In Figure 10 In the battery case 100, two third sealing members 33 are arranged between the side plate 12 and the extension 21, and the two third sealing members 33 are arranged in the direction perpendicular to the bottom plate 11 and located on the two sides of the bolt respectively, so as to improve the sealing effect of the battery case 100.

[0083] In another embodiment, one third sealing member 33 is arranged between the side plate 12 and the extension 21, and the third sealing member 33 is arranged around the outer surface of the side plate 12 and provided with a plurality of through holes, each of which corresponds to a first through hole 123 and is used to pass through the bolt 41, so as to improve the sealing effect of the battery case 100.

[0084] Referring to Figure 11 Fig. 7 shows a partial cross-sectional view of the battery case 100 according to the seventh embodiment of the present application.

[0085] In Figure 11 In the battery case 100, the battery case 100 comprises a fourth sealing member 34, which is arranged between the head of the bolt 41 and the outer circumferential surface of the extension 21, so as to shield the gap between the second through hole 211 and the bolt 41, and improve the sealing effect of the battery case 100.

[0086] Referring to Figures 12-14 , wherein, Figure 12 Fig. 1 shows a partial structure diagram of the battery case 100 from one perspective according to one embodiment of the present application; Figure 13 Fig. 2 shows a partial structure diagram of the battery case 100 from another perspective according to one embodiment of the present application; Figure 14A partial exploded view of the battery case 100 is shown.

[0087] In one embodiment, the cover plate 20 is provided with mounting holes 22, and the first sealing member 31 is provided with hollowed-out areas 312 for exposing the mounting holes. The battery case 100 includes transmission terminals 51 which extend into the inner cavity 132 through the mounting holes 22, and the transmission terminals 51 are provided with sealing glue at one end thereof facing the inner cavity 132 for fixing the transmission terminals 51 and filling the gaps between the mounting holes 22 and the transmission terminals 51.

[0088] In one embodiment, as shown in Figure 4 and Figure 14 , the battery case 100 includes transmission terminals 51 which include current terminals 511 and communication terminals 512, and the cover plate 20 includes a plurality of mounting holes 22 through which the current terminals 511 and the communication terminals 512 extend for electrical connection with the battery cell assembly 110 in the inner cavity 132. The current terminals 511 and the communication terminals 512 are provided with sealing glue at one end thereof extending into the inner cavity 132 for filling the gaps between the mounting holes 22 and the current terminals 511 and the gaps between the mounting holes 22 and the communication terminals 512, thereby improving the sealing effect of the battery case 100.

[0089] In the battery case 100 provided in Figure 14 , the battery case 100 includes first fasteners 5111 for fixedly connecting the cover plate 20 and the current terminals 511. It should be noted that Figure 14 , the space for the current terminals 511 is limited, and the first fasteners 5111 can be connected by ordinary fasteners and sealing glue for filling the fitting gaps of the fasteners. In other embodiments, the first fasteners 5111 can also be connected by bolts and sealing nuts for fixedly connecting the cover plate 20 and the current terminals 511, which can also improve the sealing effect of the battery case 100.

[0090] Correspondingly, the communication terminals 512 can also be fixedly connected to the cover plate 20 in a manner similar to the current terminals 511.

[0091] In one embodiment, the battery case 100 further includes a handle 53 which is fixed to one of the housing 10 and the cover plate 20 by second fasteners 531.

[0092] In the battery case 100 provided in Figure 14In the battery case 100 provided, the space at the position of the handle 53 is large, and the handle 53 can be fixed to the cover plate 20 in the manner of a bolt and a sealing nut. In other embodiments, the space at the position of the handle 53 is small, and the handle 53 can also be fixed to the cover plate 20 or the case 10 in the manner of a common fastener connection and sealing glue filling the fitting gap of the fastener.

[0093] In addition, in Figure 14 In the battery case 100 provided, the battery case 100 further comprises the key 52, and the fourth seal 34 is arranged between the current terminal 511 and the cover plate 20, between the communication terminal 512 and the cover plate 20, and between the key 52 and the cover plate 20, respectively, so as to improve the sealing effect of the battery case 100.

[0094] It can be understood that in other embodiments, the fourth seal 34 can also be arranged between the handle 53 and the cover plate 20 to improve the sealing effect of the battery case 100.

[0095] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean 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.

Claims

1. A battery housing, characterized by The battery case comprises a housing, a cover plate and a first seal, the housing comprises a bottom plate and a side plate, the side plate surrounds the edge of the bottom plate and forms an inner cavity with an opening, the area of the cover plate is larger than the area of the opening, the cover plate is used to shield the opening, the edge of the cover plate is provided with an extension part extending towards the bottom plate, the side plate and the extension part are respectively provided with a plurality of first through holes and a plurality of second through holes, each first through hole is aligned with a second through hole to allow a bolt to pass through; The first seal is fixed to the first surface of the cover plate on the side towards the bottom plate and surrounds the outside of the opening, the projection of the side plate on the plane where the first seal is located at least partially coincides with the first seal, the sum of the distance between the axis of the first through hole and the end of the side plate away from the bottom plate and the thickness of the first seal is greater than the distance between the first surface and the axis of the second through hole.

2. The battery case of claim 1, wherein A gap is left between the side plate and the extension part in the plane direction of the bottom plate, the first seal comprises a first protruding part, the first protruding part surrounds the outside of the side plate, the first protruding part extends towards the bottom plate and is used to at least partially fill the gap between the side plate and the extension part.

3. The battery case of claim 1, wherein In the direction perpendicular to the bottom plate, the side plate comprises a first section and a second section, the second section is used to connect the bottom plate and the first section, the thickness of the second section is greater than the thickness of the first section, and the side of the second section away from the bottom plate forms an abutting surface surrounding the first section.

4. The battery case of claim 3, wherein The battery case comprises a second seal, the second seal is fixed to the abutting surface, the projection of the extension part on the plane where the second seal is located at least partially coincides with the second seal, the sum of the distance between the axis of the second through hole and the end of the extension part towards the bottom plate and the thickness of the second seal is greater than the distance between the abutting surface and the axis of the first through hole.

5. The battery case of claim 4, wherein A gap is left between the side plate and the extension part in the plane direction of the bottom plate, the second seal comprises a second protruding part, the second protruding part surrounds the inside of the extension part, the second protruding part extends away from the bottom plate and is used to at least partially fill the gap between the side plate and the extension part.

6. The battery case of claim 1, wherein A gap is left between the side plate and the extension part in the plane direction of the bottom plate, the battery case comprises a third seal, the third seal surrounds the outer surface of the side plate and is used to at least partially fill the gap between the side plate and the extension part.

7. The battery housing of any one of claims 1-6, wherein, The battery case comprises a bolt and a sealing nut, the sealing nut is fixed to the side of the side plate away from the extension part and corresponds to the first through hole, the bolt is used to pass through the second through hole and the first through hole and engage with the sealing nut, the mutually engaged bolt and sealing nut are used to shield and seal the first through hole and the second through hole.

8. The battery case of claim 7, wherein The sealing nut comprises a sealing sleeve, which surrounds the inner wall of the threaded hole of the sealing nut and is used to at least partially fill the thread gap between the bolt and the threaded hole.

9. The battery housing of any one of claims 1-6, wherein, The cover plate is provided with a mounting hole, and the first sealing member is provided with a hollow area for exposing the mounting hole. The battery shell comprises a transmission terminal, which extends into the inner cavity through the mounting hole, and a sealing glue is arranged at one end of the transmission terminal towards the inner cavity, which is used to fix the transmission terminal and fill the gap between the mounting hole and the transmission terminal.

10. A battery, characterized by The battery shell comprises an electric core assembly and the battery shell according to any one of claims 1-9, and the electric core assembly is arranged in the inner cavity of the battery shell.

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