Battery monomer and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery monomer and electric equipment. Each battery monomer comprises a battery cell, a top cover assembly and an insulating film; a tab is led out from the first end surface of the battery cell; the top cover assembly comprises an insulating plate and an overturning plate which are connected in an overturning manner; the joint of the turnover plate and the insulating plate is opposite to the bent part of the tab; the insulating film comprises a first main surface part and a first end surface part which wrap the battery core; the first end face part is positioned on one side, away from the cell main body, of the turnover plate; the first main surface part is provided with a tangent structure in a penetrating manner and is divided into a fixed part and a movable part by the tangent structure; the first edge, away from the bent part, of the first end face part is connected with the fixed part. The first edge and the movable part are located on the two sides of the joint of the overturning plate and the insulating plate respectively. According to the utility model, an overturning space can be provided for the overturning plate of the top cover assembly through the tangent structure on the insulating film, so that mutual interference between the overturning plate and the insulating film is prevented, and rapid assembly and improvement of the coating effect of the insulating film are facilitated.

Description

Technical Field

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

[0002] During the battery production process, it is usually necessary to coat the battery cell with an insulating film, such as Mylar film. However, for a single-roll core battery, only one side is provided with a bent pole ear after being put into the shell, and the other side is suspended. In order to improve the force, a lower plastic structure with a flip wing plate is usually provided in the top cover assembly, and the flip wing plate is flipped and cooperated with the pole ear to provide support for the pole ear. However, since the top diaphragm adapted to the top cover in the existing Mylar film structure is assembled between the lower plastic structure and the battery cell, but the flip wing plate of the lower plastic structure occupies the position opposite the pole ear, during the assembly process, the Mylar film structure blocks the flipping trajectory of the flip wing plate, and the two interfere with each other, affecting the normal assembly operation. Utility Model Content

[0003] In view of this, in order to improve at least one of the above problems existing in the prior art, the utility model provides a battery cell and an electrical device.

[0004] The first technical solution of the utility model provides a battery cell, including: a battery cell, the battery cell including a battery cell body, the battery cell body having a first end face, a pole ear extending from the first end face of the battery cell body; the pole ear having a bending portion; a top cover assembly, the top cover assembly including an insulating plate and a flip plate, one end of the insulating plate in a first direction and the flip plate can be flipped and connected; in the first direction, the connection between the flip plate and the insulating plate and the bending portion of the pole ear are arranged oppositely; the first direction is the thickness direction of the battery cell; an insulating film, the insulating film is wrapped outside the battery cell, the insulating film includes a first main surface portion and a first end surface portion; in the second direction, the first end surface portion is located on a side of the flip plate away from the battery cell body, and the second direction is the height direction of the battery cell; wherein a tangent structure is provided through the first main surface portion, and the first main surface portion is divided into a fixed portion and a foldable movable portion by the tangent structure; the first end surface portion has a first edge away from the bending portion in the first direction; the first edge is connected to the fixed portion; and in the first direction, the first edge and the movable portion are respectively located on both sides of the connection between the flip plate and the insulating plate.

[0005] In a feasible implementation, two tangent structures and two flip plates are provided, and the first main surface portion is divided into a fixed portion and two movable portions by the two tangent structures.

[0006] In a feasible implementation, both the tangent structure and the flip plate are provided with one, and the first main surface portion is divided into a fixed portion and a movable portion by a tangent structure.

[0007] In a feasible implementation, the tangent structure includes a first tangent extending along a third direction, the first tangent is formed between the active portion and the first end face portion; the first tangent has a first end and a second end arranged opposite to each other, the first end extends to the edge of the first end face portion; the third direction is the length direction of the battery cell; wherein the length of the first tangent extending along the third direction is a, the length of the first end face portion in the third direction is L, and the relationship is satisfied, 50mm <a<(0.5×L-1mm)。

[0008] In a feasible implementation, the tangent structure further includes a second tangent extending along the second direction, the second tangent is connected to the second end of the first tangent, wherein the length of the second tangent extending along the second direction is b1, the width of the first end face in the first direction is w, and the relationship is satisfied, (0.5×w) <b1<(1.5×w)。

[0009] In a feasible implementation, the tangent structure includes two first tangents, and in the second direction, the two first tangents are parallel and opposite to each other; in the second direction, the spacing between the two first tangents is b2, and the width of the first end face portion in the first direction is w, satisfying the relationship, (0.5×w) <b2<(1.5×w)。

[0010] In a feasible implementation, the tangent structure includes a fourth tangent extending along the third direction and two fifth tangents extending along the second direction; the fourth tangent is formed between the movable portion and the first end face portion; the fourth tangent has a third end and a fourth end that are arranged opposite to each other; in the third direction, the two fifth tangents are parallel and arranged opposite to each other; the two fifth tangents are connected to the third end and the fourth end of the fourth tangent respectively; wherein the length of the fourth tangent extending along the third direction is c, the length of the fifth tangent extending along the second direction is b3, the length of the first end face portion in the third direction is L, and the width of the first end face portion in the first direction is w, satisfying the relationship, (0.6×L) <c<(L-4mm),(0.5×w)<b3<(1.5×w)。

[0011] In a feasible implementation, the pole ear (511) also has a first connection portion, which is connected to an end of the bending portion away from the battery cell body; an end of the flip plate away from the connection between the flip plate and the insulating plate extends to between the first connection portion and the first end face of the battery cell body.

[0012] In a feasible implementation, the flip plate abuts against the first end surface of the battery cell body.

[0013] The second technical solution of the utility model provides an electrical device, comprising a battery cell according to any one of the above-mentioned first aspects.

[0014] The beneficial effects of the above technical solution of the utility model are embodied in:

[0015] By setting a corresponding tangent structure on the insulating film to adapt to the top cover assembly with a flip plate, the flip plate can be used to provide support for the pole ear, and the flip plate and the insulating film can be effectively prevented from interfering with each other during the assembly operation, which is conducive to the rapid assembly of the top cover assembly and the wrapping operation of the insulating film, can effectively ensure the wrapping effect of the insulating film, and the assembly operation is more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure shows a three-dimensional schematic diagram of a battery cell before assembly provided by an embodiment of the utility model.

[0017] Figure 2 The figure shows a three-dimensional schematic diagram of a battery cell after assembly provided by an embodiment of the utility model.

[0018] Figure 3 Shown is a front view of a battery cell provided by an embodiment of the utility model.

[0019] Figure 4 Shown Figure 3 A partial view of the section view taken along the AA axis.

[0020] Figure 5 Shown is a schematic diagram of an expanded state of an insulating film provided by an embodiment of the utility model.

[0021] Figure 6 Shown is a schematic diagram of the unfolded state of another insulating film provided by an embodiment of the utility model.

[0022] Figure 7 Shown is a schematic diagram of the unfolded state of another insulating film provided by an embodiment of the utility model.

[0023] Figure 8 Shown is a schematic diagram of the unfolded state of another insulating film provided by an embodiment of the utility model.

[0024] Fig. 9 Shown is a schematic diagram of the unfolded state of another insulating film provided by an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 100 insulating film; 11 first main surface portion, 111 fixed portion, 113 movable portion, 12 second main surface portion; 21 first end surface portion, 211 assembly hole, 212 first edge;

[0027] 41 first tangent line, 411 first end, 412 second end, 42 second tangent line, 44 fourth tangent line, 441 third end, 442 fourth end, 45 fifth tangent line;

[0028] 500 battery cell; 510 battery cell, 511 pole ear, 5111 bending portion, 5112 first connecting portion, 512 first end surface, 513 battery cell body, 520 top cover assembly, 521 insulating plate, 5211 folding structure, 522 flip plate, 523 adapter plate, 525 cover plate. DETAILED DESCRIPTION

[0029] In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their deformations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units are not limited to the steps or units listed, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or equipment.

[0030] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] Some embodiments of the battery cells and electrical equipment in the technical solution of the utility model are provided below.

[0033] In one embodiment of the present invention, a battery cell 500 is provided. Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the battery cell 500 includes a battery cell 510, a top cover assembly 520 and an insulating film 100. The battery cell 510 includes a battery cell body 513, the battery cell body 513 has a first end surface 512, and a pole ear 511 is led out from the first end surface 512, and the pole ear 511 has a bending portion 5111, for example Figure 1 The top surface of the battery cell body 513 shown in the figure leads out the pole ear 511 in the height direction. Figure 4 In the example in FIG. 5 , the bent portion 5111 of the tab 511 extends along the thickness direction of the battery cell body 513. Correspondingly, the top cover assembly 520 includes an insulating plate 521 and a flip plate 522. The flip plate 522 is connected to one end of the insulating plate 521 in the first direction and can be flipped relative to the insulating plate 521. The first direction is the thickness direction of the battery cell 510. In the first direction, the connection between the flip plate 522 and the insulating plate 521 and the bent portion 5111 of the tab 511 are arranged opposite to each other. That is, after the assembly is completed, as shown in FIG. Figure 4 In the example, the bent portion 5111 of the pole ear 511 is located near the left end of the battery cell 510 in the thickness direction, and the connection between the insulating plate 521 and the flip plate 522 is located near the right end of the battery cell 510 in the thickness direction.

[0034] Furthermore, if Figure 4 In the example, a small folded edge structure 5211 is provided on the insulating plate 521 near the connection with the flip plate 522, the folded edge structure 5211 extends along the second direction toward the direction close to the battery cell body 513, and is integrally formed with the flip plate 522, and a fold is formed between the flip plate 522 and the folded edge structure 5211.

[0035] The insulating film 100 at least includes a first main surface 11 and a first end surface 21 connected to each other; the height direction of the battery cell 510 is the second direction, and in the second direction, the first end surface 21 is located on the side of the flip plate 522 away from the battery cell body 513; after the assembly is completed, Figure 2 and Figure 4 In the example, the insulating film 100 is wrapped around the battery cell 510. A tangent structure is provided through the first main surface 11, that is, a through structure in the shape of a tangent formed in the thickness direction of the first main surface 11, and the first main surface 11 is divided into a fixed portion 111 and a movable portion 113 by the tangent structure, and the movable portion 113 can be folded relative to the fixed portion 111; the first end surface 21 has a first edge 212 at one end of the bending portion 5111 away from the pole ear 511 in the first direction, the fixed portion 111 is connected to the first edge 212, and the first edge 212 and the movable portion 113 are respectively located on both sides of the connection between the flip plate 522 and the insulating portion in the first direction.

[0036] It can be understood that during the assembly of the battery cell 500, the flip plate 522 of the top cover assembly 520 needs to be flipped relative to the insulating plate 521, and the insulating film 100 is wrapped around the outside of the battery cell 510. By opening a through tangent structure on the first main surface 11 of the insulating film 100, the insulating plate 521 can be provided with a flip channel and space through the folding operation of the movable portion 113, thereby avoiding interference between the insulating film 100 and the insulating plate 521. When the flip plate 522 completes the flipping operation, the movable portion 113 can be restored to its original state, forming a Figure 4 In the state shown in FIG. 1 , the cutout structure can be covered with tape to fix the movable portion 113 .

[0037] It should be noted that, in order to match each flip plate 522, the number of tangent structures on the first main surface 11 is generally consistent with the number of flip plates 522. In addition, according to specific assembly requirements, the insulating film 100 may further include a second main surface 12 covering the other side of the battery cell 510, and a portion corresponding to the bottom surface of the battery cell 510.

[0038] The battery cell 500 in this embodiment can be adapted to the top cover assembly 520 having a flip plate 522 by setting a corresponding tangent structure on the insulating film 100. The flip plate 522 can be used to provide support for the pole ear 511, and can effectively prevent the flip plate 522 and the insulating film 100 from interfering with each other during the assembly operation, which is conducive to the rapid assembly of the top cover assembly 520 and the coating operation of the insulating film 100, can effectively ensure the coating effect of the insulating film 100, and the assembly operation efficiency is higher.

[0039] In a further embodiment of the present invention, Figure 1 , Figure 2 and Figure 5 As shown, the top cover assembly 520 is provided with two flip plates 522, and correspondingly, two tangent structures are provided on the first main surface 11, and the first main surface 11 is divided into a fixed portion 111 and two movable portions 113 by the two tangent structures. Among them, the fixed portion 111 is used to connect with the first end surface 21, and each movable portion 113 is correspondingly provided with one of the flip plates 522, so that during the assembly operation, the movable portion 113 provides a channel and space for the flipping operation for the flip plate 522.

[0040] Furthermore, in a specific implementation, Figure 1 , Figure 2 and Figure 5As shown, each tangent structure includes a first tangent 41. Among them, the length direction of the battery cell 510 is the third direction. The first tangent 41 is formed between the movable portion 113 of the first main surface portion 11 and the first end surface portion 21 and extends along the third direction. The first tangent 41 has a first end 411 and a second end 412 that are oppositely arranged in the third direction. Among them, the first end 411 extends along the third direction to the edge of the first main surface portion 11 and penetrates through the edge, so that a movable portion 113 is formed on the side of the first tangent 41 away from the first end surface portion 21. The first ends 411 of the two first tangents 41 are respectively located at the two outer end positions of the first main surface portion 11 in the third direction to form two movable portions 113. As Figure 5 In the example of, the length of the first tangent 41 extending along the third direction is a, and the length of the first end surface portion 21 in the third direction is L. The following relational expression is satisfied between the two: 50 mm < a < (0.5×L - 1 mm). It can be understood that if the length a of the first tangent 41 is too small, the flipping space reserved for the flipping plate 522 is small, and it is difficult to meet the assembly requirements of the flipping plate 522; if the length of the first tangent 41 is too large, the size of the fixed portion 111 of the first main surface portion 11 will be further reduced, affecting the connection between the first main surface portion 11 and the first end surface portion 21, and may even cause the fixed portion 111 to break and the first main surface portion 11 to be separated from the first end surface portion 21. Through the above size setting, the two first tangents 41 can maintain appropriate sizes, effectively meet the assembly requirements of the two flipping plates 522, and at the same time ensure the connection strength between the first main surface portion 11 and the first end surface portion 21.

[0041] Furthermore, in another specific implementation manner, as Figure 1 、 Figure 2 and Figure 6 shown, the tangent structure includes a first tangent 41 extending along the third direction and a second tangent 42 extending along the second direction. Since the third direction is the length direction of the battery cell 510 and the second direction is the height direction of the battery cell 510, the second tangent 42 is perpendicular to the first tangent 41. Specifically, the second tangent 42 is connected to the second end 412 of the first tangent 41, so that the tangent structure forms as Figure 6The L-shaped structure shown in the figure further expands the range of movement of the formed movable portion 113. Among them, the length of the second tangent line 42 extending in the second direction is b1, the width of the first end face portion 21 in the first direction is w, and the following relationship is satisfied between the two: (0.5×w) < b1 < (1.5×w), that is, the length b1 of the second tangent line 42 is between 0.5 times and 1.5 times the width w of the first end face portion 21. It can be understood that after the top cover assembly 520 is assembled, it is correspondingly arranged with the first end face 512 of the battery cell main body 513, and the first end face portion 21 of the insulating film 100 covers the first end face 512 of the battery cell main body 513, so the width of the top cover assembly 520 after assembly in the first direction is not greater than the width w of the first end face portion 21. Therefore, by setting the above dimensions for the second tangent line 42, it can be adapted to the width of the flip plate 522 of the top cover assembly 520 to meet the flipping operation requirements of the flip plate 522.

[0042] Further, in yet another specific implementation, as Figure 1 , Figure 2 and Figure 7 shown, each tangent structure includes two first tangent lines 41. Specifically, as in the example of Figure 7 , the two first tangent lines 41 are parallel and facing each other in the second direction, and the first ends 411 of the two first tangent lines 41 both penetrate the same side edge of the first main face 11 in the third direction, so that the portion between the two first tangent lines 41 forms the movable portion 113 of the first main face 11. Among them, the distance between the two first tangent lines 41 in the second direction is b2, the width of the first end face portion 21 in the first direction is w, and the following relationship is satisfied between the two: (0.5×w) < b2 < (1.5×w), that is, the distance b2 is between 0.5 times and 1.5 times the width w of the first end face portion 21. It can be understood that after the top cover assembly 520 is assembled, it is correspondingly arranged with the first end face 512 of the battery cell main body 513, and the first end face portion 21 of the insulating film 100 covers the first end face 512 of the battery cell main body 513, so the width of the top cover assembly 520 after assembly in the first direction is not greater than the width w of the first end face portion 21. Therefore, by setting the above dimensions for the distance between the two first tangent lines 41, it can be adapted to the width of the flip plate 522 of the top cover assembly 520 to meet the flipping operation requirements of the flip plate 522.

[0043] In a further embodiment of the present invention, as Figure 3 and Figure 4 and Figure 8As shown, the number of the flip plate 522 of the top cover assembly 520 is one, and after being assembled, the flip plate 522 can simultaneously cover the two tabs 511 of the battery cell 510. Correspondingly, a tangent structure is also provided on the first main surface 11 of the insulating film 100, and the first main surface 11 is divided into a fixed portion 111 and a movable portion 113 by the tangent structure, and the shape and size of the movable portion 113 are adapted to the flip plate 522, so as to provide a channel and space for the flip plate 522 to perform a flipping operation during the assembly operation.

[0044] Furthermore, if Figure 8 In the example in, the tangent structure specifically includes a fourth tangent 44 and two fifth tangents 45. Specifically, the fourth tangent 44 is formed between the movable portion 113 of the first main surface portion 11 and the first end surface portion 21, and extends along the third direction, and the fourth tangent 44 has a third end 441 and a fourth end 442 that are relatively arranged in the third direction; the two fifth tangents 45 are arranged in parallel and opposite to each other, and both extend along the second direction, one of the fifth tangents 45 is connected to the third end 441 of the fourth tangent 44, and the other fifth tangent 45 is connected to the fourth end 442 of the fourth tangent 44, so that the area enclosed by the fourth tangent 44 and the two fifth tangents 45 forms the movable portion 113, and the movable portion 113 can be folded to form an opening on the first main surface portion 11, so that the flip plate 522 of the top cover assembly 520 can pass through. The area on the side of the fifth tangent 45 away from the fourth tangent 44 in the third direction forms a fixed portion 111 of the first main surface 11, that is, in the third direction, the movable portion 113 is located between the two fixed portions 111, so that multiple connections can be formed between the first main surface 11 and the first end surface 21.

[0045] Among them, the length of the fourth tangent line 44 extending along the third direction is c, and the length of the fifth tangent line 45 extending along the second direction is b3. The following relationship is satisfied between the two: (0.6×L) < c < (L - 4mm); the length of the first end face part 21 in the third direction is L, and the width of the first end face part 21 in the first direction is w. The following relationship is satisfied between the two: (0.5×w) < b3 < (1.5×w). It can be understood that since only one movable part 113 and one flip plate 522 are provided in this embodiment, by setting the above dimensions for the length c of the fourth tangent line 44, the dimensional requirements for covering the two electrode tabs 511 of the battery cell 510 can be satisfied simultaneously, and the connection strength can be prevented from being affected due to the too narrow dimension of the fixing part 111. In addition, since the top cover assembly 520 is arranged corresponding to the first end face 512 of the battery cell main body 513 after assembly, and the first end face part 21 of the insulating film 100 covers the first end face 512 of the battery cell main body 513, the width of the top cover assembly 520 in the first direction after assembly is not greater than the width w of the first end face part 21. Therefore, by setting the above dimensions for the length b3 of the fifth tangent line 45, it can be adapted to the width of the flip plate 522 of the top cover assembly 520 to meet the flipping operation requirements of the flip plate 522.

[0046] It should be noted that in practical applications, when two flip plates 522 are provided on the top cover assembly 520, two tangent line structures as shown in the examples in Fig. 9 can also be provided on the first main face 11 of the insulating film 100. Among them, the shape of the tangent line structure is similar to that in Figure 8 , but the length dimension is shorter, so that three fixing parts 111 and two movable parts 113 are formed on the first main face 11 in an alternating manner. Each tangent line structure and the corresponding movable part 113 are arranged opposite to one flip plate 522, and the spatial requirements for the flipping operations of the two flip plates 522 can also be satisfied. The principle is similar to that in the example in Figure 8 , and will not be elaborated here.

[0047] In a further embodiment of the present utility model, as shown in Figure 1 and Figure 4 , the electrode tab 511 specifically includes a bent part 5111 and a first connecting part 5112. The first connecting part 5112 is connected to one end of the bent part 5111 away from the battery cell main body 513, and the first connecting part 5112 extends along the first direction. After the assembly is completed, the flip plate 522 has completed the flipping operation, as shown in Figure 4In the state shown in the figure, one end of the flip plate 522 away from the connection between the insulating plate 521 and the flip plate 522 extends to between the first connection portion 5112 of the pole lug 511 and the first end surface 512 of the battery cell body 513, that is, the first connection portion 5112 of the pole lug 511 is clamped between the flip plate 522 and the insulating plate 521, so as to provide support for the pole lug 511 through the flip plate 522, thereby improving the stress condition of the pole lug 511, which is beneficial to preventing the pole lug 511 from being torn due to uneven stress, and the flip plate 522 covers the first connection portion 5112 of the pole lug 511, which can further isolate the first connection portion 5112 of the pole lug 511 and the battery cell body to maintain the insulation state.

[0048] Furthermore, if Figure 4 In the example in FIG. 1 , the flip plate 522 abuts against the first end surface 512 of the battery cell body 513 to provide support for the flip plate 522 , so that the flip plate 522 provides a supporting force to the pole ear 511 .

[0049] Furthermore, if Figures 2 to 8 In the example in FIG. 1 , the insulating film 100 further includes a second main surface 12 disposed opposite to the first main surface 11. The second main surface 12 is connected to an end of the first end surface 21 away from the first main surface 11. After assembly, the first main surface 11 and the second main surface 12 respectively cover two large surfaces of the battery cell 510 that are opposite to each other in the thickness direction.

[0050] Preferably, if Figure 1 In the example, the size of the second main surface 12 in the second direction can be set to be larger than the height of the battery cell 510, so as to reserve a certain area at the end of the second main surface 12 away from the first end surface 21 for covering the bottom surface of the battery cell 510 during assembly. The second main surface 12 and the first main surface 11 can be connected and fixed by means of adhesive tape bonding or hot melting.

[0051] Furthermore, if Figure 1 and Figure 4 In the example, the battery cell 500 further includes an adapter 523, a cover plate 525 and a pole. The cover plate 525 is arranged above the top cover assembly 520, and a pole corresponding to the pole lug 511 is arranged on the cover plate 525; an assembly hole 211 corresponding to the pole is opened on the insulating plate 521 of the top cover assembly 520 and the first end surface 21 of the insulating film 100, and the bottom of the pole is penetrated in the corresponding assembly hole 211; an adapter 523 is arranged between each pole and the corresponding pole lug 511, and the adapter 523 is connected to the corresponding pole and the pole lug 511 at the same time, so that the pole lug 511 forms an electrical connection with the pole.

[0052] Another embodiment of the present invention provides an electric device, comprising the battery cell 500 in any of the above embodiments, so as to supply power to the electric device through the battery cell 500.

[0053] Furthermore, in practical applications, multiple battery cells 500 in any of the above embodiments can be combined to form a battery pack to power electrical equipment, which can effectively enhance the power supply capacity.

[0054] In addition, the electrical equipment has all the beneficial effects included in the battery cell 500 or the battery in any of the above embodiments, which will not be described in detail here.

[0055] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0056] The block diagrams of the devices, apparatuses, equipment and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems can be connected, arranged and configured in any manner. Words such as "including", "comprising", "having" and the like are open words, referring to "including but not limited to" and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to" and can be used interchangeably with them. It should also be noted that in the apparatus and equipment of the present utility model, each component can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present utility model.

[0057] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the utility model. Therefore, the utility model is not intended to be limited to the aspects shown herein, but in accordance with the widest range consistent with the principles and novel features of this utility model.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell, characterized in that: include: A battery cell (510), the battery cell (510) comprising a battery cell body (513), the battery cell body (513) having a first end surface (512), a pole ear (511) extending from the first end surface (512) of the battery cell body (513); the pole ear (511) having a bending portion (5111); A top cover assembly (520), the top cover assembly (520) comprising an insulating plate (521) and a flip plate (522), one end of the insulating plate (521) in a first direction and the flip plate (522) being flippably connected; in the first direction, a connection between the flip plate (522) and the insulating plate (521) and a bent portion (5111) of the pole ear (511) are arranged opposite to each other; the first direction is a thickness direction of the battery cell (510); an insulating film (100), the insulating film (100) being wrapped around the battery cell (510), the insulating film (100) comprising a first main surface (11) and a first end surface (21); in a second direction, the first end surface (21) is located on a side of the flip plate (522) away from the battery cell body (513), and the second direction is a height direction of the battery cell (510); The first main surface portion (11) is penetrated by a tangent structure, and the first main surface portion (11) is divided by the tangent structure into a fixed portion (111) and a foldable movable portion (113); the first end surface portion (21) has a first edge (212) away from the bending portion (5111) in the first direction; the first edge (212) is connected to the fixed portion (111); and in the first direction, the first edge (212) and the movable portion (113) are respectively located on both sides of the connection between the flip plate (522) and the insulating plate (521).

2. The battery cell according to claim 1, characterized in that: The tangent structure and the flip plate (522) are both provided in two numbers, and the first main surface part (11) is divided into a fixed part (111) and two movable parts (113) by the two tangent structures.

3. The battery cell according to claim 1, characterized in that: The tangent structure and the flip plate (522) are both provided with one, and the first main surface (11) is divided into a fixed portion (111) and a movable portion (113) by the tangent structure.

4. The battery cell according to claim 2, characterized in that: The tangent structure comprises a first tangent (41) extending along a third direction, the first tangent (41) being formed between the movable portion (113) and the first end face portion (21); the first tangent (41) having a first end (411) and a second end (412) arranged opposite to each other, the first end (411) extending to an edge of the first end face portion (21); the third direction is a length direction of the battery cell (510); The length of the first tangent line (41) extending along the third direction is a, and the length of the first end surface (21) in the third direction is L, which satisfies the relationship: 50 mm <a<(0.5×L-1mm)。 5. The battery cell according to claim 4, characterized in that: The tangent structure further comprises a second tangent (42) extending along the second direction, the second tangent (42) being connected to the second end (412) of the first tangent (41), wherein the length of the second tangent (42) extending along the second direction is b1, the width of the first end face portion (21) in the first direction is w, and the relationship (0.5×w) is satisfied. <b1<(1.5×w)。 6. The battery cell according to claim 4, characterized in that: The tangent structure comprises two first tangents (41), and in the second direction, the two first tangents (41) are arranged parallel and opposite to each other; in the second direction, the spacing between the two first tangents (41) is b2, and the width of the first end face portion (21) in the first direction is w, satisfying the relationship, (0.5×w) <b2<(1.5×w)。 7. The battery cell according to claim 3, characterized in that: The tangent structure comprises a fourth tangent (44) extending along a third direction and two fifth tangents (45) extending along a second direction; the fourth tangent (44) is formed between the movable portion (113) and the first end face portion (21); the fourth tangent (44) has a third end (441) and a fourth end (442) arranged opposite to each other; in the third direction, the two fifth tangents (45) are arranged parallel and opposite to each other; the two fifth tangents (45) are respectively connected to the third end (441) and the fourth end (442) of the fourth tangent (44); wherein the length of the fourth tangent (44) extending along the third direction is c, the length of the fifth tangent (45) extending along the second direction is b3, the length of the first end face portion (21) in the third direction is L, the width of the first end face portion (21) in the first direction is w, and the relationship (0.6×L) is satisfied. <c<(L-4mm),(0.5×w)<b3<(1.5×w)。 8. The battery cell according to any one of claims 1 to 7, characterized in that: The pole ear (511) also has a first connecting portion (5112), and the first connecting portion (5112) is connected to an end of the bending portion (5111) away from the battery cell body (513); an end of the flip plate (522) away from the connection between the flip plate (522) and the insulating plate (521) extends to between the first connecting portion (5112) and the first end surface (512) of the battery cell body (513).

9. The battery cell according to any one of claims 1 to 7, characterized in that: The flip plate (522) abuts against the first end surface (512) of the battery cell body (513).

10. An electrical device, characterized in that: include: A battery cell as claimed in any one of claims 1 to 9.

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