Battery cell, battery and vehicle

Abstract

A battery cell (100), a battery (1000) and a vehicle. The battery cell (100) comprises a first core (11), a second core (12), a lead-out piece (13), a first tab (14) connected to an end of the first core (11), and a second tab (15) connected to an end of the second core (12), wherein the lead-out piece (13) is connected between the first tab (14) and the second tab (15), and the first core (11) and the second core (12) can be fitted together, forming an accommodating space (16) between the first tab (14), the second tab (15), the lead-out piece (13), the first core (11) and the second core (12); and a support member (20) is located in the accommodating space (16) and configured to support the first tab (14) and the second tab (15). The battery cell (100) has the accommodating space (16), the support member (20) is located in the accommodating space (16), and the support member (20) can support the first tab (14) and the second tab (15) while functioning to protect a weld seam and prevent welding residues from falling off, thus avoiding compression of the first tab (14) and the second tab (15) into the first core (11) and the second core (12), improving the safety of the battery cell (100).

Description

Cells, batteries and vehicles

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 18, 2024, with application number 202420130125.5 and entitled “Battery Cells, Batteries and Vehicles,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of vehicle technology, and in particular to a battery cell, a battery, and a vehicle. Background Art

[0003] In related technologies, batteries primarily consist of a housing and a cover assembly. The housing provides a sealed, supportive space that accommodates the electrode assembly and electrolyte. The cover assembly's poles transmit the electrode assembly's electrical energy from within the sealed space to the poles outside. The sealed space is hollow and contains insulating tape, which primarily protects the tab welds and prevents welding debris from falling. However, it provides no support, and the tabs could be compressed into the center of the electrode assembly, posing a safety risk.

[0004] Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a battery cell having a storage space, wherein a support member is located within the storage space. The support member can support the first and second tabs while protecting the weld and preventing welding residue from falling, thereby preventing the first and second tabs from being compressed into the first and second cores, thereby improving the safety of the battery cell.

[0006] According to the first aspect of the present application, the battery cell includes: a first pole core, a second pole core, a lead-out piece, and a first pole lug connected to the end of the first pole core, and a second pole lug connected to the end of the second pole core, the lead-out piece is connected between the first pole lug and the second pole lug, wherein the first pole core and the second pole core can be fitted together, and an accommodation space is constructed between the first pole lug, the second pole lug, the lead-out piece, the first pole core and the second pole core; and a support member, wherein the support member is located in the accommodation space and is used to support the first pole lug and the second pole lug.

[0007] According to the battery cell of the embodiment of the present application, the first pole core and the second pole core can be fitted together to construct an accommodation space between the first pole ear, the second pole ear, the lead-out sheet, the first pole core and the second pole core. The support member is located in the accommodation space. The support member can support the first pole ear and the second pole ear on the basis of protecting the weld and preventing welding residues from falling, and can prevent the first pole ear and the second pole ear from being compressed into the first pole core and the second pole core, thereby improving the safety of the battery cell.

[0008] According to some embodiments of the present application, the surface of the first pole tab facing the accommodating space has a first slope, the surface of the second pole tab facing the accommodating space has a second slope, and the first slope and the second slope are symmetrical with respect to the fitting surface of the first pole core and the second pole core.

[0009] According to some embodiments of the present application, the first pole tab includes a first connecting portion and a first bending portion, the first connecting portion is connected to the end portion of the first pole core, and one end of the first bending portion is connected to the first connecting portion; the second pole tab includes a second connecting portion and a second bending portion, the second connecting portion is connected to the end portion of the second pole core, and one end of the second bending portion is connected to the second connecting portion; the other end of the first bending portion and the other end of the second bending portion are both bent in a direction approaching each other; wherein, the first connecting portion has the first inclined surface, the second bending portion has the second inclined surface, and the first bending portion and the second bending portion are both parallel to the end face of the first pole core or the end face of the second pole core.

[0010] According to some embodiments of the present application, the bending part between the first connecting part and the first bending part has a first transition slope to increase the space at the bending part between the first connecting part and the first bending part; the bending part between the second connecting part and the second bending part has a second transition slope to increase the space at the bending part between the second connecting part and the second bending part.

[0011] According to some embodiments of the present application, at least a portion of the support member is in contact with the inner wall surface of the accommodating space.

[0012] According to some embodiments of the present application, the support member includes a first support area, a fixed area and a second support area, the first support area and the second support area are respectively located at two ends of the fixed area, the first pole ear and the second pole ear are both fixed on the same side of the fixed area, and the first support area and the second support area are suitable for flipping towards a direction close to each other.

[0013] According to some embodiments of the present application, the first supporting area includes a first overlapping area, which is located at an end of the first supporting area away from the fixed area; the second supporting area includes a second overlapping area, which is located at an end of the second supporting area away from the fixed area; wherein the first overlapping area and the second overlapping area overlap.

[0014] According to some embodiments of the present application, a first bending area is further connected between the first supporting area and the fixed area, and a first fold and a second fold are spaced apart on the same side of the first bending area. The first fold and the second fold are both constructed as grooves provided on the surface of the first bending area, so that when the first supporting area is bent, the surface of the first bending area away from the first fold or the second fold is constructed in a circular arc shape; a second bending area is further connected between the second supporting area and the fixed area, and a third fold and a fourth fold are spaced apart on the same side of the second bending area. The third fold and the fourth fold are both constructed as grooves provided on the surface of the second bending area, so that when the second supporting area is bent, the surface of the second bending area away from the third fold or the fourth fold is constructed in a circular arc shape.

[0015] According to some embodiments of the present application, the fixing area has a plurality of through holes arranged at intervals, and the through holes are located between the first electrode tab and the second electrode tab.

[0016] According to some embodiments of the present application, the support member includes a support area and a first fixed area and a second fixed area spaced apart from each other, the first pole ear is connected to a side of the first fixed area away from the support area, the second pole ear is connected to a side of the second fixed area away from the support area, one end of the support area is connected to an end of the first fixed area away from the second fixed area, and the other end is connected to an end of the second fixed area away from the first fixed area.

[0017] According to some embodiments of the present application, a first bending area is further connected between the support area and the first fixed area, and a first fold and a second fold are spaced apart on the same side of the first bending area. The first fold and the second fold are both constructed as grooves provided on the surface of the first bending area, so that when the first fixed area is bent, the surface of the first bending area away from the first fold or the second fold is constructed in a circular arc shape; a second bending area is further connected between the support area and the second fixed area, and a third fold and a fourth fold are spaced apart on the same side of the second bending area. The third fold and the fourth fold are both constructed as grooves provided on the surface of the second bending area, so that when the second fixed area is bent, the surface of the second bending area away from the third fold or the fourth fold is constructed in a circular arc shape.

[0018] According to some embodiments of the present application, the support area has a plurality of through holes arranged at intervals, and the through holes are located between the first electrode tab and the second electrode tab.

[0019] A battery according to an embodiment of the second aspect of the present application includes: a battery cell according to an embodiment of the first aspect of the present application.

[0020] According to the battery of the embodiment of the present application, by providing the above-mentioned battery cell, the first electrode tab and the second electrode tab can be prevented from being compressed into the first electrode core and the second electrode core, thereby improving the safety of the battery cell and further improving the safety of the battery.

[0021] A vehicle according to an embodiment of the third aspect of the present application includes: a battery according to the embodiment of the above-mentioned second aspect of the present application.

[0022] According to the vehicle of the embodiment of the present application, by providing the above-mentioned battery, the safety of the vehicle during operation can be improved. Additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] FIG1 is a cross-sectional view of a battery according to some embodiments of the present application;

[0025] FIG2 is a schematic diagram of a folded support member according to some embodiments of the present application;

[0026] FIG3 is a cross-sectional view of a battery according to some other embodiments of the present application;

[0027] FIG4 is a schematic diagram of a folded support member according to other embodiments of the present application.

[0028] 14. The first electrode tab is provided in the shape of a folded rectangle and a plurality of lead-out tabs. The first electrode tab is provided in the shape of a folded rectangle and a plurality of lead-out tabs. The first electrode tab is provided in the shape of a folded rectangle and a plurality of lead-out tabs. DETAILED DESCRIPTION

[0029] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] The battery cell 100 according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 4 .

[0033] According to the battery cell 100 of the embodiment of the first aspect of the present application, it includes a first pole core 11, a second pole core 12, a lead-out tab 13, a first pole tab 14, a second pole tab 15 and a support member 20, one end of the first pole tab 14 is connected to the end of the first pole core 11, and the other end of the first pole tab 14 is connected to the lead-out tab 13; one end of the second pole tab 15 is connected to the end of the second pole core 12, and the other end of the second pole tab 15 is connected to the lead-out tab 13, and the first pole tab 14 and the second pole tab 15 are connected on the same side of the lead-out tab 13.

[0034] Among them, the first pole core 11 and the second pole core 12 can be fitted together, for example, the first pole core 11 and the second pole core 12 can be flipped toward the side away from the lead-out piece 13 and fitted together; the first pole core 11 and the second pole core 12 can both be flipped 90° in a direction close to each other and fitted together.

[0035] When the first pole core 11 and the second pole core 12 are flipped toward each other, the first pole core 11 can drive the first pole tab 14 to fold, and the second pole core 12 can drive the second pole tab 15 to fold. For example, the first pole tab 14 and the second pole tab 15 can be made of aluminum, which is a relatively soft material. When the first pole core 11 is flipped, the first pole tab 14 can be folded, and when the second pole core 12 is flipped, the second pole tab 15 can be folded.

[0036] After the first pole core 11 and the second pole core 12 are bonded together, an accommodating space 16 can be constructed between the first pole tab 14, the second pole tab 15, the lead-out piece 13, the first pole core 11 and the second pole core 12. The support member 20 is located in the accommodating space 16 and is used to support the first pole tab 14 and the second pole tab 15. This can prevent the first pole tab 14 and the second pole tab 15 from being compressed into the first pole core 11 and the second pole core 12, thereby improving the safety of the battery cell 100.

[0037] The first tab 14 can be connected to the lead tab 13 by welding, and a weld is formed at the weld connection between the first tab 14 and the lead tab 13, which also forms welding residue. The second tab 15 can be connected to the lead tab 13 by welding, and a weld is formed at the weld connection between the second tab 15 and the lead tab 13, which also forms welding residue. The support member 20 is located in the accommodation space 16 and can protect the weld and prevent welding residue from falling.

[0038] According to the battery cell 100 of the embodiment of the present application, the first pole core 11 and the second pole core 12 are fitted together to construct a receiving space 16 between the first pole tab 14, the second pole tab 15, the lead-out piece 13, the first pole core 11 and the second pole core 12. The support member 20 is located in the receiving space 16. The support member 20 can support the first pole tab 14 and the second pole tab 15 on the basis of protecting the weld and preventing welding residues from falling, and can prevent the first pole tab 14 and the second pole tab 15 from being compressed into the first pole core 11 and the second pole core 12, thereby improving the safety of the battery cell 100.

[0039] According to some embodiments of the present application, referring to FIG1 and FIG3 , the surface of the first tab 14 facing the accommodating space 16 has a first inclined surface 1411. Specifically, the surface of the first tab 14 connected to the first pole core 11 has the first inclined surface 1411, and the first inclined surface 1411 extends obliquely in the direction from the lead tab 13 toward the first pole core 11. The surface of the second tab 15 facing the accommodating space 16 has a second inclined surface 1511. Specifically, the surface of the second tab 15 connected to the second pole core 12 has the second inclined surface 1511, and the second inclined surface 1511 extends obliquely in the direction from the lead tab 13 toward the second pole core 12. The first inclined surface 1411 and the second inclined surface 1511 are symmetrical about the mating plane of the first pole core 11 and the second pole core 12, which can increase the stability of the accommodating space 16.

[0040] For example, in a projection plane perpendicular to the bonding surface, the projection shape of the accommodating space 16 is an isosceles triangle, which can further increase the stability of the accommodating space 16 .

[0041] According to some embodiments of the present application, referring to Figures 1 and 3, the first pole tab 14 includes a first connecting portion 141 and a first bending portion 142. The first connecting portion 141 is connected to the end of the first pole core 11, one end of the first bending portion 142 is connected to the first connecting portion 141, and the other end of the first bending portion 142 is connected to the lead-out piece 13. The first connecting portion 141 has a first inclined surface 1411.

[0042] The second pole tab 15 includes a second connecting portion 151 and a second bent portion 152. The second connecting portion 151 is connected to the end of the second pole core 12. One end of the second bent portion 152 is connected to the second connecting portion 151, and the other end of the second bent portion 152 is connected to the lead-out piece 13. The second connecting portion 151 has a second inclined surface 1511.

[0043] The other end of the first bending portion 142 and the other end of the second bending portion 152 are both bent in a direction approaching each other; wherein the first bending portion 142 and the second bending portion 152 are both parallel to the end face of the first pole core 11 or the end face of the second pole core 12, so as to form an isosceles triangle structure between the first connecting portion 141, the first bending portion 142, the second connecting portion 151 and the second bending portion 152, further increasing the stability of the accommodating space 16.

[0044] According to some embodiments of the present application, referring to Figures 1 and 3, the bend between the first connecting portion 141 and the first bending portion 142 has a first transition slope 143 to increase the space between the first connecting portion 141 and the first bending portion 142, thereby increasing the stability of the bend. The bend between the second connecting portion 151 and the second bending portion 152 has a second transition slope 153 to increase the space between the second connecting portion 151 and the second bending portion 152, thereby increasing the stability of the bend.

[0045] According to some embodiments of the present application, referring to Figures 1 and 3, at least part of the support member 20 is in contact with the inner wall surface of the accommodating space 16. It can be that a part of the support member 20 is in contact with the inner wall surface of the accommodating space 16, or the entire support member 20 is in contact with the inner wall surface of the accommodating space 16, which can improve the supporting strength of the support member 20 for the first electrode tab 14 and the second electrode tab 15.

[0046] According to some embodiments of the present application, referring to FIG1-FIG2 , the support member 20 includes a first support area 21, a fixing area 22, and a second support area 23. The first support area 21 and the second support area 23 are respectively connected to the two ends of the fixing area 22. The first tab 14 and the second tab 15 are both fixed to the same side of the fixing area 22. Specifically, the first bend 142 of the first tab 14 and the second bend 152 of the second tab 15 are located on the same side of the fixing area 22. For example, the fixing area 22 can be fixed to the first tab 14 and the second tab 15 using adhesive.

[0047] The first support area 21 and the second support area 23 are adapted to flip toward each other, with the support member 20 positioned within the accommodating space 16, thereby enhancing the strength with which the support member 20 supports the first and second tabs 14 and 15. For example, the first support area 21 may align with the first inclined surface 1411, and the second support area 23 may align with the second inclined surface 1511. For another example, within a projection plane perpendicular to the aligning plane of the first and second pole cores 11 and 12, the projection of the support member 20 is an isosceles triangle, thereby enhancing the stability of the support member 20.

[0048] The first pole lug 14 and the second pole lug 15 are both fixed on the same side of the fixed area 22. When the first pole core 11 and the second pole core 12 are flipped in a direction toward each other, the first pole core 11 can drive the first support area 21 to fold, and the second pole core 12 can drive the second support area 23 to fold, so that the first support area 21 and the second support area 23 can fit with the inner wall surface of the accommodating space 16.

[0049] According to some embodiments of the present application, referring to Figures 1-2, the first support area 21 includes a first overlapping area 211, which is located at the end of the first support area 21 away from the fixed area 22; the second support area 23 includes a second overlapping area 231, which is located at the end of the second support area 23 away from the fixed area 22; wherein the first overlapping area 211 and the second overlapping area 231 are overlapped, which can prevent the edges of the first support area 21 and the second support area 23 from penetrating the first pole ear 14 or the second pole ear 15, and can improve the safety of the support member 20 supporting the first pole ear 14 and the second pole ear 15.

[0050] In a specific example, the first support region 21 has a fifth fold, which is located at the edge of the first overlapping region 211 and is disposed near the fixed region 22. The fifth fold is configured as a groove provided in the first overlapping region 211. The second support region 23 has a sixth fold, which is located at the edge of the second overlapping region 231 and is disposed near the fixed region 22. The sixth fold is configured as a groove provided in the second overlapping region 231. The fifth fold on the first support region 21 can facilitate the folding of the first overlapping region 211 when the first pole core 11 is folded, and the sixth fold on the second support region 23 can facilitate the folding of the second overlapping region 231 when the second pole core 12 is folded, so that the first overlapping region 211 is easily overlapped with the second overlapping region 231.

[0051] According to some embodiments of the present application, referring to Figures 1 and 2, a first bending region 24 is further connected between the first support region 21 and the fixed region 22. A first fold 241 and a second fold are spaced apart on the same side of the first bending region 24. The first fold 241 and the second fold are both configured as grooves provided on the surface of the first bending region 24. When the first support region 21 is bent, the surface of the first bending region 24 facing away from the first fold 241 or the second fold is configured in an arc shape, thereby preventing stress concentration in the first bending region 24. For example, the first bending region 24 may be located at the first transition slope 143 at the bend between the first connecting portion 141 and the first bending portion 142.

[0052] A second bending region 25 is connected between the second support region 23 and the fixed region 22. A third fold 251 and a fourth fold are spaced apart on the same side of the second bending region 25. Both the third fold 251 and the fourth fold are configured as grooves on the surface of the second bending region 25. When the second support region 23 bends, the surface of the second bending region 25 facing away from the third fold 251 or the fourth fold is configured in an arc shape, thereby preventing stress concentration in the second bending region 25. For example, the second bending region 25 may be located at the second transition slope 153 at the bend between the second connecting portion 151 and the second bending portion 152.

[0053] According to some embodiments of the present application, referring to Figures 1 and 2, the fixing area 22 has a plurality of spaced-apart through-holes, which are located between the first electrode tab 14 and the second electrode tab 15. On the one hand, when injecting electrolyte into the first electrode core 11 and the second electrode core 12, the electrolyte can be injected into the first electrode core 11 and the second electrode core 12 through the through-holes; on the other hand, the internal gas of the first electrode core 11 and the second electrode core 12 can be discharged through the through-holes.

[0054] According to some embodiments of the present application, referring to Figures 3-4, the support member 20 includes a support region 28 and a first fixing region 26 and a second fixing region 27, with the first fixing region 26 and the second fixing region 27 being spaced apart. The first fixing region 26 is connected to the first tab 14, and the first tab 14 is connected to the side of the first fixing region 26 facing away from the support region 28. The second fixing region 27 is connected to the second tab 15, and the second tab 15 is connected to the side of the second fixing region 27 facing away from the support region 28. Specifically, the first bend 142 of the first tab 14 and the second bend 152 of the second tab 15 are located on the same side of the first fixing region 26 and the second fixing region 27. For example, the first fixing region 26 can be fixed to the first tab 14 using adhesive, and the second fixing region 27 can be fixed to the second tab 15 using adhesive.

[0055] One end of the support area 28 is connected to the end of the first fixing area 26 away from the second fixing area 27, and the other end of the support area 28 is connected to the end of the second fixing area 27 away from the first fixing area 26. The support member 20 is located in the accommodating space 16 and is used to support the first and second tabs 14 and 15. For example, the first support area 21 can be aligned with the first inclined surface 1411, and the second support area 23 can be aligned with the second inclined surface 1511.

[0056] According to some embodiments of the present application, referring to Figures 3-4, a first bending region 24 is further connected between the support region 28 and the first fixing region 26. A first fold 241 and a second fold are spaced apart on the same side of the first bending region 24. The first fold 241 and the second fold are both configured as grooves provided on the surface of the first bending region 24. When the first fixing region 26 is bent, the surface of the first bending region 24 facing away from the first fold 241 or the second fold is configured in an arc shape, thereby preventing stress concentration in the first bending region 24. For example, the first bending region 24 may be located at the first transition slope 143 at the bend between the first connecting portion 141 and the first bending portion 142.

[0057] A second bending zone 25 is connected between the support zone 28 and the second fixing zone 27. A third fold 251 and a fourth fold are spaced apart on the same side of the second bending zone 25. Both the third fold 251 and the fourth fold are configured as grooves on the surface of the second bending zone 25. This allows the surface of the second bending zone 25 facing away from the third fold 251 or the fourth fold to be configured in an arc shape when the second fixing zone 27 is bent, thereby preventing stress concentration in the second bending zone 25. For example, the second bending zone 25 may be located at the second transition slope 153 at the bend between the second connecting portion 151 and the second bending portion 152.

[0058] According to some embodiments of the present application, referring to Figures 1 and 2, the support area 28 has a plurality of spaced-apart through-holes, which are located between the first electrode tab 14 and the second electrode tab 15. On the one hand, when injecting electrolyte into the first electrode core 11 and the second electrode core 12, the electrolyte can be injected into the first electrode core 11 and the second electrode core 12 through the through-holes; on the other hand, the internal gas of the first electrode core 11 and the second electrode core 12 can be discharged through the through-holes.

[0059] The battery 1000 according to the second embodiment of the present application includes: the battery cell 100 according to the first embodiment of the present application.

[0060] According to the battery 1000 of the embodiment of the present application, by providing the above-mentioned battery cell 100, the first electrode tab 14 and the second electrode tab 15 can be prevented from being compressed into the first electrode core 11 and the second electrode core 12, thereby improving the safety of the battery cell 100 and further improving the safety of the battery 1000.

[0061] A vehicle according to an embodiment of the third aspect of the present application includes: a battery 1000 according to the embodiment of the second aspect of the present application.

[0062] According to the vehicle of the embodiment of the present application, by providing the above-mentioned battery 1000, the safety of the vehicle during operation can be improved.

[0063] In the description of this specification, reference to the terms "some embodiments," "optionally," "further," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0064] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell, characterized in that, Comprising: A first electrode core, a second electrode core, a lead-out piece, a first electrode tab connected to the end of the first electrode core, and a second electrode tab connected to the end of the second electrode core, the lead-out piece being connected between the first electrode tab and the second electrode tab, wherein the first electrode core and the second electrode core can be attached, and a receiving space is constructed among the first electrode tab, the second electrode tab, the lead-out piece, the first electrode core, and the second electrode core; A support member, which is located in the receiving space and is used to support the first electrode tab and the second electrode tab.

2. The battery cell according to claim 1, characterized in that, The surface of the first electrode tab facing the receiving space has a first inclined surface, and the surface of the second electrode tab facing the receiving space has a second inclined surface, and the first inclined surface and the second inclined surface are symmetric about the attachment surface of the first electrode core and the second electrode core.

3. The battery cell according to claim 2, wherein, The first electrode tab includes a first connection portion and a first bending portion, the first connection portion is connected to the end of the first electrode core, and one end of the first bending portion is connected to the first connection portion; The second electrode tab includes a second connection portion and a second bending portion, the second connection portion is connected to the end of the second electrode core, and one end of the second bending portion is connected to the second connection portion; The other ends of the first bending portion and the second bending portion are both bent in a direction approaching each other; wherein, The first connection portion has the first inclined surface, the second bending portion has the second inclined surface, and both the first bending portion and the second bending portion are parallel to the end surface of the first electrode core or the end surface of the second electrode core.

4. The battery cell according to claim 3, wherein, A first transition inclined surface is provided at the bending portion between the first connection portion and the first bending portion to increase the space at the bending portion between the first connection portion and the first bending portion; A second transition inclined surface is provided at the bending portion between the second connection portion and the second bending portion to increase the space at the bending portion between the second connection portion and the second bending portion.

5. The battery cell according to any one of claims 1-4, characterized in that, At least a part of the support member is in contact with the inner wall surface of the receiving space.

6. The battery cell according to any one of claims 1-5, characterized in that, The support member includes a first support area, a fixing area, and a second support area. The first support area and the second support area are respectively located at both ends of the fixing area. The first electrode tab and the second electrode tab are both fixed on the same side of the fixing area, and the first support area and the second support area are adapted to flip towards each other.

7. The battery cell according to claim 6, characterized in that, The first support area includes a first overlapping area, and the first overlapping area is located at the end of the first support area away from the fixing area; The second support area includes a second overlapping area, and the second overlapping area is located at the end of the second support area away from the fixing area; Wherein, the first overlapping area and the second overlapping area overlap each other.

8. The battery cell according to claim 6, wherein A first bending area is further connected between the first support area and the fixing area. On the same side of the first bending area, there are spaced-apart first creases and second creases. Both the first creases and the second creases are configured as grooves provided on the surface of the first bending area, so that when the first support area is bent, the surface of the first bending area facing away from the first crease or the second crease is configured as an arc shape; A second bending area is also connected between the second supporting area and the fixed area, and a third fold and a fourth fold separated from each other are provided on the same side of the second bending area. The third fold and the fourth fold are both constructed as grooves provided on the surface of the second bending area, so that when the second supporting area is bent, the surface of the second bending area away from the third fold or the fourth fold is constructed in an arc shape.

9. The battery cell according to claim 6, wherein The fixing area has a plurality of through holes arranged at intervals, and the through holes are located between the first pole lug and the second pole lug.

10. The battery cell according to any one of claims 1-5, characterized in that, The support member includes a support area and a first fixed area and a second fixed area that are spaced apart from each other, the first pole ear is connected to a side of the first fixed area that is away from the support area, the second pole ear is connected to a side of the second fixed area that is away from the support area, one end of the support area is connected to an end of the first fixed area that is away from the second fixed area, and the other end is connected to an end of the second fixed area that is away from the first fixed area.

11. The battery cell according to claim 10, characterized in that, A first bending area is further connected between the supporting area and the first fixing area, and a first fold and a second fold separated from each other are provided on the same side of the first bending area, and the first fold and the second fold are both configured as grooves provided on the surface of the first bending area, so that when the first fixing area is bent, the surface of the first bending area away from the first fold or the second fold is configured as an arc shape; A second bending area is also connected between the supporting area and the second fixed area, and a third fold and a fourth fold separated from each other are provided on the same side of the second bending area. The third fold and the fourth fold are both constructed as grooves provided on the surface of the second bending area, so that when the second fixed area is bent, the surface of the second bending area away from the third fold or the fourth fold is constructed in an arc shape.

12. The battery cell according to claim 10, wherein, The support area has a plurality of through holes arranged at intervals, and the through holes are located between the first pole lug and the second pole lug.

13. A battery, characterized in that, include: A battery cell according to any one of claims 1 to 12.

14. A vehicle, characterized in that, include: A battery according to claim 13.

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