Battery monomer and electric equipment

Abstract

The utility model relates to a battery monomer and electric equipment. Each single battery comprises a battery cell and a cover plate assembly; the battery cell comprises a battery cell main body and a tab, and the battery cell main body comprises a first end surface; the tab comprises a leading-out part and a first connecting part which are connected in sequence, and the leading-out part is led out from the first end surface of the battery cell main body; the cover plate assembly comprises a base plate and an overturning plate; the overturning plate is positioned between the base plate and the first end surface of the battery cell main body; the turnover plate is connected with the base plate in a turnover manner; wherein the turnover plate comprises an abutting part and a shaping part, in the first direction, the abutting part is closer to the first end face than the shaping part, and the abutting part is in contact with the first end face of the battery cell main body; a part of the lead-out part is accommodated between the shaping part and the first end surface of the battery cell main body; the first direction is perpendicular to the first end face. According to the utility model, the tabs are folded and shaped, so that short circuit caused by bifurcation interpolation of the tabs is avoided; and the battery is simple and efficient to disassemble and assemble, and is convenient for mass production.

Description

Technical Field

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

[0002] Each stacked electrode in a laminated battery has a bent tab extending from each electrode. Due to the large number of tabs, a certain amount of redundancy is currently implemented in the tab length to prevent misalignment after stacking. However, the lack of redundant tabs can lead to bifurcations or tab insertion, resulting in internal short circuits within the battery cell.

[0003] Currently, to address the problem of combing and gathering redundant tabs, independent mounting brackets or shaping aids are typically installed. However, this solution is not conducive to mass production and affects assembly efficiency and battery space utilization, thereby affecting the battery's energy density. Utility Model Content

[0004] To this end, the technical problem to be solved by the present invention is to overcome the technical difficulties in the prior art of the long pole ear and the lack of shaping and gathering settings, and to provide a battery cell and electrical equipment to shape and comb the bent pole ear.

[0005] In the first aspect, in order to solve the above technical problems, the present invention provides a battery cell, which includes:

[0006] A battery cell comprises a battery cell body and a tab, wherein the battery cell body comprises a first end surface; the tab comprises a lead-out portion and a first connecting portion connected in sequence, and the lead-out portion is led out from the first end surface of the battery cell body;

[0007] The cover plate assembly includes a base plate and a flip plate, wherein the flip plate is located between the base plate and the first end surface of the battery cell body; the flip plate and the base plate are flippably connected;

[0008] In which, the flip plate includes a contact portion and a shaping portion. In the first direction, the contact portion is closer to the first end face of the battery cell body than the shaping portion, and the contact portion is in contact with the first end face of the battery cell body; part of the lead-out portion is accommodated between the shaping portion and the first end face of the battery cell body; the first direction is perpendicular to the first end face of the battery cell body.

[0009] In one embodiment of the present invention, one end of the substrate along the second direction and the abutment portion are reversibly connected; the reversible connection between the substrate and the abutment portion is opposite to and staggered with the connection between the lead-out portion and the first connection portion; at least one end of the shaping portion along the third direction is connected to the abutment portion, the second direction is the width direction of the substrate, and the third direction is the length direction of the substrate.

[0010] In one embodiment of the present invention, the substrate includes a plate body and a flip member, one end of the flip member in the first direction is connected to the plate body, the other end of the flip member in the first direction is connected to the abutment portion, and a fold is formed between the flip member and the abutment portion.

[0011] In one embodiment of the present invention, the abutting portion and the substrate are connected by hot melting or adhesive bonding, or the abutting portion and the substrate are detachably connected.

[0012] In one embodiment of the present invention, the first surface of the shaping portion facing the first end face of the battery cell body is a slope; the first surface has a first edge arranged close to the connection between the first connecting portion and the lead-out portion and a second edge arranged away from the first edge along its inclined direction; in the first direction, the distance between the first edge and the first end face of the battery cell body is greater than the distance between the second edge and the first end face of the battery cell body.

[0013] In one embodiment of the present invention, a converter is further included, and the tab further includes a second connection portion connected to the first connection portion, and the substrate has a first side surface arranged toward the battery cell body; the converter is located between the first side surface of the substrate and the second connection portion; the converter has a tab connection portion and a column connection portion, and the tab connection portion is connected to the second connection portion; wherein a protrusion is provided on the first side surface of the substrate, and the protrusion and the side of the converter facing away from the second connection portion are abutted against each other, and an insulation gap is provided between the tab connection portion of the converter and the first side surface of the substrate; the insulation gap and the tab connection portion are in a one-to-one correspondence.

[0014] In one embodiment of the present invention, it further includes at least two poles and a cover plate, at least two of the poles are arranged on the cover plate at intervals along the third direction; the poles and the pole connecting parts are in a one-to-one correspondence, each of the pole connecting parts is provided with a through hole, and the pole is inserted into the through hole at one end close to the battery body.

[0015] In one embodiment of the present invention, the tab connection portion connects two adjacent pole connection portions; and the thermal insulation gap is formed between two adjacent raised portions.

[0016] In one embodiment of the present invention, the substrate has a second side surface arranged away from the first side surface; the substrate is provided with a mounting hole for installing the pole corresponding to the position of the protrusion; the two ends of the mounting hole along the first direction respectively pass through the second side surface of the substrate and the side of the protrusion facing the battery cell body.

[0017] In a second aspect, the present invention further provides an electrical device comprising the battery cell described in any one of the above embodiments.

[0018] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0019] The battery cell and electrical equipment described in the present invention are provided with a flip plate, which not only makes it possible to gather, shape and fix the pole ear to avoid safety accidents caused by its bifurcation and insertion, but also, compared with additional auxiliary workpieces or mounting brackets, the cover plate assembly described in the present invention occupies less space, can improve the volume energy density of the battery cell, and is processed in conjunction with the structure of the battery cell itself, making disassembly and assembly simple and efficient, and convenient for mass production and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 This is a schematic structural diagram of the battery cell in Example 1 of the present utility model;

[0022] Figure 2 This is a schematic structural diagram of the cover assembly before flipping over in Example 1 of the present utility model;

[0023] Figure 3 This is a schematic structural diagram of the cover assembly after flipping over in the first embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the assembly of the cover plate assembly, the pole, the cover plate, and the adapter in the first embodiment of the present invention;

[0025] Figure 5 This is a structural schematic diagram of another angle of the assembly of the cover plate assembly, the pole, the cover plate, and the adapter in the first embodiment of the present invention;

[0026] Figure 6 This is an enlarged schematic diagram of the cover assembly mating with the battery cell before being flipped over in Example 1 of the present utility model;

[0027] Figure 7 This is an enlarged schematic diagram of the cover assembly in the first embodiment of the present invention after being turned over and mated with the battery cell;

[0028] Figure 8 This is a partial structural diagram of the cover plate assembly and the battery cell after assembly in the first embodiment of the present invention;

[0029] Figure 9 for Figure 8 Schematic diagram of the structure of the battery cell;

[0030] Figure 10 This is a schematic cross-sectional structure diagram of a battery cell in the first embodiment of the present utility model;

[0031] Figure 11 This is another cross-sectional structural diagram of a battery cell in the first embodiment of the present utility model;

[0032] Figure 12 for Figure 11 Magnified view at point A in the middle.

[0033] Explanation of the markings in the figure in the specification: 1. battery cell; 11. battery cell body; 1101. first end face; 12. tab; 1201. lead-out portion; 1202. first connection portion; 1203. second connection portion; 2. cover plate assembly; 3. substrate; 31. plate body; 32. flip member; 33. first side surface; 3301. raised portion; 34. second side surface; 35. mounting hole; 4. flip plate; 41. abutment portion; 42. shaping portion; 4201. first surface; 4202. first edge; 4203. second edge; 5. adapter; 51. tab connection portion; 52. pole connection portion; 5201. through hole; 6. thermal insulation gap; 7. pole; 8. cover plate. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. Example 1

[0035] Reference Figures 1 to 12 As shown, the first embodiment of the present invention provides a battery cell, which includes a battery cell 1 and a cover assembly 2. The cover assembly 2 is used to seal the shell and fix the pole to form an electrical connection with the battery cell 1, and is also used to shape and retract the pole ear 12 to avoid short circuit caused by bifurcation or internal insertion.

[0036] The cover plate assembly 2 includes a base plate 3 and a flip plate 4, which are reversibly connected to the base plate 3. Compared to independently provided mounting brackets or shaping auxiliary parts, the battery cell cover plate assembly 2 of the present invention can reduce the number of parts, simplify the assembly process, achieve higher integration, better space utilization, and facilitate processing and mass production.

[0037] Specifically, refer to Figure 1 and Figure 9 As shown, the battery cell 1 includes a battery cell body 11 and a tab 12. The battery cell body 11 includes a first end face 1101 and a second end face. The first end face 1101 and the second end face are arranged opposite to each other in a first direction, the first direction being perpendicular to the first end face 1101, and the tab 12 is led out from both the first end face 1101 and the second end face.

[0038] In some embodiments, the cover plate assembly 2 has one set and is located on the first end surface 1101 or the second end surface for tab shaping. In some embodiments, the cover plate assembly 2 has two sets and is respectively located on the first end surface 1101 and the second end surface.

[0039] In the first embodiment of the present invention, the cover plate assembly 2 is located on the first end surface 1101 as an example for description. When the cover plate assembly 2 is located on the second end surface, its installation structure is the same as that of this embodiment and will not be repeated.

[0040] Further, refer to Figure 6 and Figure 7 As shown, after the cover plate assembly 2 is assembled, its flip plate 4 is located between the base plate 3 and the battery cell body 11. When the cover plate assembly 2 is located on the side where the first end surface 1101 is located, in the first direction, the flip plate 4 is located between the base plate 3 and the first end surface 1101 of the battery cell body 11.

[0041] Specifically, refer to Figures 2 to 5 As shown, one set of sides of the substrate 3 is flipably connected to the flip plate 4, and the side of the substrate 3 used to connect to the flip plate 4 can be located at one end along the second direction, or at one end along the third direction.

[0042] The second direction is defined as the width of the substrate 3, and the third direction is defined as the length of the substrate 3. Preferably, one end of the substrate 3 along the second direction, i.e., the long side, is connected to the flip plate 4. Compared to connecting the flip plate 4 along the short side, the area where the connection can be made is longer, and under the same connection method, the long side connection provides greater structural strength. When the substrate needs to be flipped for assembly or disassembly, the long side connection requires less space, which can reduce the size of the fixture and facilitate assembly and processing.

[0043] Furthermore, the base plate 3 includes a plate body 31 and a flip member 32. One end of the flip member 32 in the first direction is connected to the plate body 31, and the other end of the flip member 32 in the first direction is connected to the flip plate 4.

[0044] The flip member 32 is configured as a thinning structure or includes a weak portion, and the thinning area or the weak portion serves as a fold to facilitate folding and flipping. In addition, the flip member 32 can also be configured as a hinge or other workpiece that can form a flip relationship.

[0045] Furthermore, the flip plate 4 and the base plate 3 are both configured as plastic parts.

[0046] In some embodiments, the flip plate 4 and the base plate 3 can be connected by a raised snap after flipping, or they can be connected by other detachable parts. The disassembly and assembly efficiency is high but it requires the addition and fixing of snaps or other parts.

[0047] In addition, the abutment portion 41 and the substrate 3 can also be set to be hot-melt or adhesively connected, without adding parts and without increasing the weight of the battery cell, but the disassembly and assembly efficiency is slightly lower than that of snaps, etc.; the hot-melt or adhesive position is consistent with the position of snaps and other components set in other embodiments.

[0048] Specifically, refer to Figure 2 、 Figure 3 and Figure 7 As shown, the flip plate 4 includes an abutting portion 41 and a shaping portion 42. In the first direction, the abutting portion 41 is closer to the first end surface 1101 of the cell body 11 than the shaping portion 42, and the abutting portion 41 contacts the first end surface 1101 of the cell body 11.

[0049] First, the abutting portion 41 limits the battery cell body 11 in the first direction through the abutting relationship, maintains the relative position relationship between the battery cell body 11 and the substrate 3, and prevents the tab from being displaced due to movement.

[0050] Secondly, since there is a height difference between the abutting portion 41 and the shaping portion 42 in the first direction, when the abutting portion 41 contacts the first end surface 1101 , the shaping portion 42 and the first end surface 1101 naturally form an accommodating gap, which is used for the tab 12 to be led out from the first end surface 1101 .

[0051] Furthermore, at least one end of the flip plate 4 in the third direction is configured as an abutting portion 41 ; in the third direction, at least one end of the shaping portion 42 is connected to the abutting portion 41 .

[0052] Reference Figure 2 As shown, preferably, there are two groups of abutment portions 41, which are respectively located on both sides of the shaping portion 42 in the third direction and connected thereto. The two groups of abutment portions 41 can balance the force when limiting the battery cell body 11, resulting in a better fixing effect.

[0053] It should be noted that, based on the above-mentioned flip plate structure, no matter whether the flip plate 4 is connected to the long side or the short side of the substrate 3, the connection between the flip plate and the substrate 3 is formed by the abutment portion 41 of the flip plate 4 rather than the shaping portion 42, and the area that forms a detachable connection with the substrate 3 by snapping or hot melting is also located at the abutment portion 41 rather than the shaping portion 42.

[0054] When the flip plate 4 is connected to the short side of one end of the substrate 3 along the third direction, the substrate 3 is connected to the end of the flip plate 4 provided with abutment 41; when the flip plate 4 is connected to the long side of one end of the substrate 3 along the second direction, the substrate 3 is only connected to the area where the abutment 41 is located, and a gap is formed between the shaping portion 42 and the substrate 3 that passes through in the second direction, which is used to provide avoidance for the winding, placement and shaping of the tab 12.

[0055] Continue, refer to Figures 6 to 10As shown, the tab 12 includes a lead-out portion 1201 , a first connecting portion 1202 , and a second connecting portion 1203 that are sequentially connected. The lead-out portion 1201 is led out from the first end surface 1101 and / or the second end surface of the battery cell body 11 .

[0056] In this embodiment, the lead portion 1201 is partially accommodated between the shaping portion 42 and the first end surface 1101 of the cell body 11. The connection between the lead portion 1201 and the first connecting portion 1202 is positioned opposite and offset from the reversible connection between the substrate 3 and the abutting portion 41. This allows the first connecting portion 1202 to pass around one side of the shaping portion 42 along the second direction and extend into the gap between the shaping portion 42 and the substrate 3. After reversal assembly, the second connecting portion 1203 is located between the shaping portion 42 and the substrate 3.

[0057] Based on the above-mentioned tab placement, the shaping portion 42 can be arranged parallel to the substrate 3, or inclined to form an angle with the substrate 3. Since the tabs are stacked and have a certain thickness, a certain amount of misalignment will occur after the tabs are led out and bent around the shaping portion 42. If the shaping portion 42 is arranged parallel to the substrate 3, there will be a certain amount of wiggle space between the shaping portion 42 and the substrate 3 after the tab 12 is bent once, which will easily increase the misalignment and be detrimental to its electrical connection with the terminal 7.

[0058] Preferably, in order to better shape the tab 12, refer to Figures 2 to 6 As shown, the first surface 4201 of the shaping portion 42 facing the first end surface 1101 of the battery cell body 11 is an inclined surface, so as to better straighten the tab 12 .

[0059] The first surface 4201 has, along its inclination direction, a first edge 4202 located near the connection between the first connecting portion 1202 and the lead-out portion 1201, and a second edge 4203 located away from the first edge 4202. In the first direction, the distance between the first edge 4202 and the first end surface 1101 of the battery cell body 11 is greater than the distance between the second edge 4203 and the first end surface 1101 of the battery cell body 11.

[0060] Reference Figure 10 As shown, the inclined surface is set so that the outermost layer of the tab 12 away from the shaping portion 42 in the stacking direction can be approximately parallel to the lead-out portion 1201, avoiding the tab 12 from drooping toward the shaping portion 42 to form a larger misalignment, and enhancing the shaping and fixing effect at the first connecting portion 1202 where the tab 12 is bent; at the same time, the second connecting portion 1203 of the tab 12 can be closer to the substrate 3, which is convenient for electrical connection with the pole 7.

[0061] After the tabs 12 are shaped using the cover assembly 2, the tabs are stacked in an orderly manner and can form an effective electrical connection with the pole 7. Therefore, the tabs 12 in the battery cell of the present invention do not need to be excessively redundant due to factors such as bending misalignment, and the base material cost of the battery cell is also reduced to a certain extent.

[0062] Specifically, refer to Figure 5 、 Figures 10 to 12 As shown, the battery cell in the first embodiment of the present invention further includes an adapter 5 , which has a tab connecting portion 51 and a post connecting portion 52 , which are connected to the tab 12 and the post 7 respectively.

[0063] The adapter 5 is used to achieve electrical connection between the tab 12 and the pole 7. The substrate 3 has a first side surface 33 facing the cell body 11. The adapter 5 is located between the first side surface 33 of the substrate 3 and the second connection portion 1203 of the tab 12.

[0064] One side surface of the tab connection portion 51 of the adapter 5 in the first direction is connected to the second connection portion 1203 of the tab 12 , and the other side surface of the adapter 5 in the first direction is away from the second connection portion 1203 and abuts against the protrusion 3301 of the substrate 3 .

[0065] Reference Figure 3 As shown, the protrusion 3301 is located on the first side surface 33 of the substrate 3. Due to the existence of the protrusion 3301, a thermal insulation gap 6 is formed between the tab connection portion 51 of the adapter 5 and the first side surface 33 of the substrate 3. The gap width of the thermal insulation gap 6 in the first direction is the height of the protrusion 3301 in the first direction.

[0066] Due to the presence of thermal insulation gap 6, the area where the tab connection portion 51 is welded to the tab 12 does not directly contact the first side surface 33 of the substrate 3, and the area in contact with the raised portion 3301 is relatively small. Because the thermal conductivity of the gas layer within thermal insulation gap 6 is low and heat transfer is poor, the heat generated by the welding of the adapter 5 and the tab 12 is not transferred significantly to the substrate 3 when it is conducted through the thermal insulation gap 6. This prevents welding heat from causing localized melting and short-circuiting of the substrate 3, thereby improving the safety and service life of the battery cell. There is a one-to-one correspondence between the thermal insulation gap 6 and the tab connection portion 51.

[0067] Specifically, the battery cell of the first embodiment of the present invention further includes a pole 7 and a cover plate 8. The poles 7 have at least two poles with the same polarity, and at least two poles 7 are spaced apart along the third direction on the cover plate 8. The poles 7 and the pole connecting portions 52 are in a one-to-one correspondence.

[0068] Each pole connection portion 52 of the adapter 5 is provided with a through hole 5201, into which the end of the pole 7 near the battery body 11 is inserted. The tab connection portion 51 connects two adjacent pole connection portions 52, and accordingly, a thermal insulation gap 6 is formed between two adjacent protrusions 3301.

[0069] The substrate 3 has a second side surface 34 disposed away from the first side surface 33. A mounting hole 35 for mounting the terminal 7 is provided at a position corresponding to the raised portion 3301. The mounting hole 35 has two ends along the first direction that extend through the second side surface 34 of the substrate 3 and the side of the raised portion 3301 that faces the battery cell body 11.

[0070] Reference Figure 3 As shown, each group of protrusions 3301 can be arranged around the outside of the mounting hole 35 to form a ring, or the protrusions 3301 can also be set as multiple groups of sub-protrusions, and the sub-protrusions can be set as arcs or block structures located on the circumference, distributed at intervals along the circumferential direction, and supported in the first direction to form an insulation gap 6. Example 2

[0071] The second embodiment of the present invention also provides an electrical device, which includes the battery cell in the first embodiment; the battery cell is provided with a flippable cover assembly 2 to gather and reshape the redundant pole ears 12 after bending, so as to avoid internal short circuit caused by bifurcation and insertion, thereby improving the safety of the electrical device.

[0072] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0073] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0074] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0075] For ease of description, spatially relative terms such as "above," "on the upper surface of," "on top of," etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "on top of" other devices or structures would then be positioned as "below" or "below" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0076] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0077] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may be subject to various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. The above embodiments are merely examples for clear explanation and are not limitations on the implementation methods. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A battery cell, characterized in that: include, A battery cell (1) comprises a battery cell body (11) and a tab (12), wherein the battery cell body (11) comprises a first end surface (1101); the tab (12) comprises a lead-out portion (1201) and a first connecting portion (1202) connected in sequence, and the lead-out portion (1201) is led out from the first end surface (1101) of the battery cell body (11); A cover plate assembly (2) comprising a base plate (3) and a flip plate (4), wherein the flip plate (4) is located between the base plate (3) and the first end surface (1101) of the battery cell body (11); the flip plate (4) and the base plate (3) are flippably connected; The flip plate (4) includes a contact portion (41) and a shaping portion (42); in a first direction, the contact portion (41) is closer to the first end face (1101) of the battery cell body (11) than the shaping portion (42), and the contact portion (41) is in contact with the first end face (1101) of the battery cell body (11); a portion of the lead-out portion (1201) is accommodated between the shaping portion (42) and the first end face (1101) of the battery cell body (11); and the first direction is perpendicular to the first end face (1101) of the battery cell body (11).

2. The battery cell according to claim 1, wherein: One end of the substrate (3) along the second direction is connected to the abutting portion (41) in a reversible manner; the reversible connection between the substrate (3) and the abutting portion (41) is opposite to and staggered with the connection between the lead-out portion (1201) and the first connecting portion (1202); at least one end of the shaping portion (42) along the third direction is connected to the abutting portion (41), the second direction being the width direction of the substrate (3), and the third direction being the length direction of the substrate (3).

3. The battery cell according to claim 2, wherein: The base plate (3) comprises a plate body (31) and a flip member (32), one end of the flip member (32) in a first direction is connected to the plate body (31), the other end of the flip member (32) in the first direction is connected to the abutment portion (41), and a fold is formed between the flip member (32) and the abutment portion (41).

4. The battery cell according to claim 2, wherein: The abutting portion (41) and the base plate (3) are connected by hot melting or bonding, or the abutting portion (41) and the base plate (3) are detachably connected.

5. The battery cell according to any one of claims 1 to 4, characterized in that: The first surface (4201) of the shaping portion (42) facing the first end surface (1101) of the battery cell body (11) is an inclined surface; the first surface (4201) has a first edge (4202) arranged close to the connection between the first connecting portion (1202) and the lead-out portion (1201) and a second edge (4203) arranged away from the first edge (4202) along its inclined direction; in the first direction, the distance between the first edge (4202) and the first end surface (1101) of the battery cell body (11) is greater than the distance between the second edge (4203) and the first end surface (1101) of the battery cell body (11).

6. The battery cell according to claim 1, wherein: The battery cell (11) further comprises a transition piece (5), wherein the tab (12) further comprises a second connection portion (1203) connected to the first connection portion (1202), and the substrate (3) comprises a first side surface (33) disposed toward the battery cell body (11); the transition piece (5) is located between the first side surface (33) of the substrate (3) and the second connection portion (1203); the transition piece (5) comprises a tab connection portion (51) and a column connection portion (52), wherein the tab connection portion (51) and connected to the second connecting portion (1203); wherein, a protrusion (3301) is provided on the first side surface (33) of the substrate (3), the protrusion (3301) and the side of the adapter (5) facing away from the second connecting portion (1203) abut against each other, and a thermal insulation gap (6) is provided between the tab connecting portion (51) of the adapter (5) and the first side surface (33) of the substrate (3); the thermal insulation gap (6) and the tab connecting portion (51) are in a one-to-one correspondence.

7. The battery cell according to claim 6, characterized in that: It also includes at least two poles (7) and a cover plate (8), wherein at least two poles (7) are arranged on the cover plate (8) at intervals along a third direction; the poles (7) and the pole connecting portions (52) are in a one-to-one correspondence, and each pole connecting portion (52) is provided with a through hole (5201), and one end of the pole (7) close to the battery cell body (11) is inserted into the through hole (5201).

8. The battery cell according to claim 7, characterized in that: The pole lug connection portion (51) connects two adjacent pole connection portions (52); and the thermal insulation gap (6) is formed between the two adjacent raised portions (3301).

9. The battery cell according to any one of claims 6 to 8, characterized in that: The substrate (3) has a second side surface (34) disposed away from the first side surface (33); a mounting hole (35) for mounting the pole (7) is disposed on the substrate (3) at a position corresponding to the raised portion (3301); two ends of the mounting hole (35) along the first direction respectively penetrate the second side surface (34) of the substrate (3) and the side of the raised portion (3301) facing the battery cell body (11).

10. An electrical device, characterized in that: A battery cell comprising the battery cell according to any one of claims 1 to 9.

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