Battery monomer and electric equipment

Abstract

The utility model discloses a battery monomer and electric equipment, and belongs to the technical field of batteries. According to the battery monomer and the electric equipment disclosed by the utility model, the coating part of the insulating film is enclosed to form the film cavity, the battery cell is accommodated in the film cavity, and the film cavity penetrates through the coating part along the first direction, so that the insulativity of the battery cell is ensured through the coating part; meanwhile, at least one side, in the first direction, of the coating part is provided with an edge folding part, and the edge folding part is configured to limit relative movement of the coating part and the battery cell, so that displacement of the insulating film is avoided, and the insulating effect of the insulating film is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery monomer and electric equipment. BACKGROUND

[0002] In the existing battery monomer, the insulating film is usually wrapped around the battery cell to ensure the insulation of the battery cell. However, for some battery monomers, the limiting structure for fixing the insulating film cannot be arranged on the cover plate assembly, which leads to the displacement of the insulating film and affects the insulation effect. SUMMARY

[0003] The utility model discloses a battery monomer and electric equipment, which aims to improve the utilization rate of the internal space of the shell while avoiding the displacement of the insulating film.

[0004] To achieve the above-mentioned purpose, the following technical solutions are provided:

[0005] On the one hand, a battery monomer is provided, which includes:

[0006] a battery cell;

[0007] an insulating film, including a cladding part and a folded edge part, the cladding part forms a film chamber; the battery cell is accommodated in the film chamber; the film chamber penetrates the cladding part along a first direction; the cladding part is provided with the folded edge part on at least one side along the first direction, and the folded edge part is configured to limit the relative movement of the cladding part and the battery cell.

[0008] As an optional solution of the battery monomer, it further includes an adapter, the battery cell includes a battery cell body and a tab, the battery cell body has a first end face perpendicular to a second direction, and the tab is led out from the first end face; the adapter includes a first connecting part and a second connecting part, the first connecting part is connected with the tab, and at least part of the folded edge part is located between the second connecting part and the battery cell body, wherein the second direction and the first direction are perpendicular to each other.

[0009] As an optional solution of the battery monomer, the folded edge part has a fixed end and a free end, the fixed end is connected with the cladding part; and the free end is connected with the cladding part through a connecting piece.

[0010] As an optional solution of the battery monomer, the connecting piece is a glue paper.

[0011] As an optional solution of the battery monomer, the fixed end and the free end are oppositely arranged along the second direction, and the fixed end is farther away from the first end surface than the free end; wherein a < c ≤ 1.3Y, c is the length of the folding edge part along the second direction, a is the distance between one end of the cladding part away from the first end surface and one end of the second connecting part away from the first end surface in the second direction, and Y is the height of the battery cell along the second direction;

[0012] And / or, d ≤ b ≤ 1.2Z, b is the width of the folding edge part along the third direction, Z is the thickness of the battery cell along the third direction, and d is the width of the second connecting part along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0013] As an optional solution of the battery monomer, the battery monomer further comprises a cover plate assembly, the cover plate assembly comprises a cover plate, an insulating piece and a pole, the pole is arranged on the cover plate, and the pole is connected with the second connecting part, the insulating piece is located between the cover plate and the battery cell, and the insulating piece is connected to the cover plate.

[0014] As an optional solution of the battery monomer, the insulating piece has a first surface arranged away from the cover plate, the first surface is provided with an abutting part, and the abutting part abuts against the adapter.

[0015] As an optional solution of the battery monomer, the battery monomer further comprises a shell, the shell comprises a shell cavity, the battery cell and the insulating film are accommodated in the shell cavity.

[0016] The insulating film further comprises an isolation part, the isolation part is arranged on at least one side of the cladding part along the first direction, and the isolation part is located between the adapter and the cavity wall of the shell cavity; the isolation part comprises a first isolation part perpendicular to the third direction and / or a second isolation part perpendicular to the second direction; at least part of the projection of the adapter along the third direction is located in the projection of the first isolation part; and / or, at least part of the projection of the adapter along the second direction is located in the projection of the second isolation part, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0017] As an optional solution of the battery monomer, the isolation part is connected to the cladding part; or, the isolation part is connected to the folding edge part; or, when the isolation part comprises the first isolation part and the second isolation part, the second isolation part is connected to the cladding part, and the first isolation part is connected to the folding edge part.

[0018] As an optional solution of the battery monomer, the isolation part comprises two first isolation parts, and the two first isolation parts are respectively located on two sides of the adapter along the third direction; and / or, the first isolation part comprises a plurality of isolation segments, and the plurality of isolation segments are arranged at intervals along the second direction.

[0019] As an optional solution of the battery monomer, the isolation part comprises a first isolation part and a second isolation part, the first connecting part is located between the second isolation part and the first end face; and the second isolation part and the first isolation part are connected, wherein 0

[0020] And / or, 1mm≤g≤10mm, g is the width of the first isolation part along the first direction;

[0021] And / or, j≤f≤W, f is the width of the second isolation part along the third direction, W is the width of the cladding part along the third direction, and j is the width of the first connecting part along the third direction;

[0022] And / or, 1mm≤k≤10mm, k is the length of the second isolation part along the first direction;

[0023] And / or, c+n>H, c is the length of the folding part along the second direction, n is the length of the first isolation part along the second direction, and H is the height of the cladding part along the second direction.

[0024] As an optional solution of the battery monomer, the cladding part comprises a first covering area perpendicular to the third direction and a second covering area and a third covering area arranged opposite along the second direction, the third covering area is arranged towards the first end face, the first covering area is located between the second covering area and the third covering area, and the first covering area connects the second covering area and the third covering area, wherein the fixed end of the folding part and the second covering area are connected, the first isolation part and the first covering area are connected, and the second isolation part and the third covering area are connected.

[0025] As an optional solution of the battery monomer, the cladding part comprises a second covering area perpendicular to the second direction, and the second covering area is connected with the fixed end of the folding part, wherein the second direction and the first direction are perpendicular to each other.

[0026] As an optional solution of the battery monomer, the length of the covering part along the first direction is L, X≤L≤X+4mm, X is the length of the battery along the first direction; and / or,

[0027] The length of the covering part along the second direction is H, Y-3mm≤H≤Y+2mm, Y is the height of the battery along the second direction; and / or,

[0028] The length of the covering part along the third direction is W, Z≤W≤120%Z, Z is the thickness of the battery along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0029] In another aspect, a power device is provided, comprising the above battery monomer.

[0030] Compared with the prior art, the battery monomer and the power device have the following beneficial effects:

[0031] The battery monomer and the power device of the utility model, the covering part of the insulating film is enclosed to form a film chamber, the battery is accommodated in the film chamber, the film chamber penetrates the covering part along the first direction, and then the insulating property of the battery is ensured through the covering part; at the same time, the covering part is provided with a folding edge part on at least one side along the first direction, the folding edge part is configured to limit the relative movement of the covering part and the battery, and then the displacement of the insulating film is avoided, and the insulating effect of the insulating film is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is an exploded view of the battery monomer in the embodiment of the utility model;

[0033] Figure 2 It is a structure schematic view of the battery and the insulating film in the embodiment of the utility model;

[0034] Figure 3 It is a partial sectional view of the battery monomer in the embodiment of the utility model;

[0035] Figure 4 It is a first structure schematic view of the battery in the embodiment of the utility model;

[0036] Figure 5 It is a second structure schematic view of the battery in the embodiment of the utility model;

[0037] Figure 6 It is an initial state schematic view of the insulating film in the embodiment of the utility model;

[0038] Figure 7 It is a schematic view of the insulating film in the first state (folding edge part is folded in place) in the embodiment of the utility model;

[0039] Figure 8 Figure 1 is a first state of the insulating film and the battery cell in the first embodiment of the present application;

[0040] Figure 9 Figure 2 is a second state of the insulating film and the battery cell in the first embodiment of the present application;

[0041] Figure 10 Figure 3 is a first state of the insulating film and the battery cell in the first embodiment of the present application;

[0042] Figure 11 Figure 4 is a second state (the covering part is formed) of the insulating film and the battery cell in the first embodiment of the present application;

[0043] Figure 12 Figure 5 is a state of the insulating film (completely formed) and the battery cell in the first embodiment of the present application.

[0044] Reference signs:

[0045] 1, battery cell; 11, battery cell body; 111, first end face; 12, tab; 2, insulating film; 21, covering part; 211, first covering area; 212, second covering area; 213, third covering area; 22, folding part; 221, fixed end; 222, free end; 23, isolation part; 231, first isolation part; 232, second isolation part; 3, adapter; 31, first connecting part; 32, second connecting part; 4, cover plate assembly; 41, cover plate; 42, insulating part; 421, abutting part; 43, pole; 5, shell; 51, shell chamber; 6, connecting part. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0048] It should be noted that like reference numerals and characters refer to like elements throughout the several views of the drawings. Main or primary reference elements are defined in one drawing and need not be further defined in subsequent drawings.

[0049] In the description of the utility model, it needs to be explained that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, or is the orientation or positional relationship commonly placed when the utility model product is used, and is merely for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0050] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "providing" and "connecting" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0051] In the utility model, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "on" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Under", "below" and "under" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0052] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0053] As Figures 1-12As shown, the battery cell provided in the embodiment includes a cell 1, an insulation film 2, a cover plate assembly 4, and a shell 5. The insulation film 2 is wrapped outside the cell 1 to make the cell 1 have insulation and waterproof effects. The shell 5 includes a shell cavity 51 and an opening in communication with the shell cavity 51. The cell 1 and the insulation film 2 are accommodated in the shell cavity 51, and the cover plate assembly 4 is arranged at the opening to ensure the sealing of the shell cavity 51.

[0054] The existing insulation film 2 is usually arranged in a character-shaped structure. After wrapping the cell 1 once, the insulation film 2 is fixed to the lower plastic of the cover plate assembly 4 by means of hot melting to limit the movement of the insulation film 2 and ensure the insulation effect. However, for some battery cells, the lower plastic cannot be provided with a protrusion for fixing the insulation film 2, so that the insulation film 2 cannot be fixed and is prone to displacement, affecting the insulation effect.

[0055] To solve the above problems, in the embodiment, the insulation film 2 includes a wrapping part 21 and a folding part 22. The wrapping part 21 is enclosed to form a film cavity. The cell 1 is accommodated in the film cavity. The film cavity penetrates the wrapping part 21 along a first direction. The folding part 22 is arranged on at least one side of the wrapping part 21 along the first direction. The folding part 22 is configured to limit the relative movement between the wrapping part 21 and the cell 1.

[0056] The battery cell of the embodiment ensures the insulation of the cell 1 by wrapping the cell 1 with the insulation film 2. Meanwhile, the relative movement between the wrapping part 21 and the cell 1 is limited by the folding part 22, thereby avoiding the displacement of the insulation film 2 and ensuring the insulation effect of the insulation film 2.

[0057] In the embodiment, the folding part 22 is arranged on both sides of the wrapping part 21 along the first direction. The cell 1 is limited between the two folding parts 22 arranged along the first direction, thereby avoiding the relative movement between the cell 1 and the insulation film 2.

[0058] In some embodiments, the cell 1 includes a cell body 11 and a tab 12. The cell body 11 has a first end surface 111 perpendicular to a second direction. The tab 12 is led out from the first end surface 111. The second direction is perpendicular to the first direction. Further, the battery cell further includes an adapter 3. The adapter 3 includes a first connecting part 31 and a second connecting part 32. The first connecting part 31 is connected with the tab 12. At least part of the folding part 22 is located between the second connecting part 32 and the cell body 11. In this way, the folding part 22 is clamped between the second connecting part 32 and the cell body 11 to form insulation between the adapter 3 and the cell body 11, thereby improving the insulation effect of the battery cell.

[0059] It should be noted that for the battery cell 1 shaped by winding, the battery cell body 11 is very close to the adapter 3, and once the isolation film of the battery cell body 11 is damaged, internal short circuit is prone to occur. By locating at least part of the folded edge portion 22 between the second connecting portion 32 and the battery cell body 11, the battery cell body 11 and the adapter 3 can be insulated, and the insulation effect is improved.

[0060] Specifically in the embodiment, the battery cell 1 includes two tabs 12 leading from the first end face 111 of the battery cell body 11, the two tabs 12 are different in polarity, and the two tabs 12 are spaced apart along the first direction; the adapter 3 is provided with two, the two adapters 3 are respectively arranged on the two sides of the battery cell 1 in the first direction, the first connecting portion 31 of the two adapters 3 is respectively connected with the two tabs 12, and the second connecting portion 32 of the two adapters 3 is respectively connected with the pole column 43 in the two cover plate assemblies 4, wherein the second connecting portion 32 of each adapter 3 and the battery cell body 11 are provided with the folded edge portion 22.

[0061] In some embodiments, the folded edge portion 22 has a fixed end 221 and a free end 222, the fixed end 221 is connected with the cladding portion 21, and the free end 222 is connected with the cladding portion 21 through the connecting piece 6. In this way, after the battery cell 1 is installed in the film chamber, the free end 222 of the folded edge portion 22 is connected with the cladding portion 21 through the connecting piece 6, which not only limits the relative movement of the cladding portion 21 and the battery cell 1 through the folded edge portion 22, but also facilitates the assembly of the battery cell 1 and the cladding portion 21.

[0062] It should be noted that without considering the positional relationship between the battery cell 1 and the cover plate assembly 4, as long as the connection mode of the fixed end 221 of the folded edge portion 22 and the cladding portion 21 does not hinder the connection of the adapter 3 and the tab 12.

[0063] In some embodiments, the connecting piece 6 is a glue paper. The free end 222 of the folded edge portion 22 is fixedly attached to the cladding portion 21 through the glue paper, which is easy to operate and low in cost.

[0064] In some embodiments, the cover plate assembly 4 is arranged on both sides of the battery cell body 11 in the first direction, and the tab 12 is arranged on one side of the battery cell body 11 in the second direction. In order to avoid the influence of the folded edge portion 22 on the connection of the tab 12 and the adapter 3, the fixed end 221 and the free end 222 are arranged opposite to each other along the second direction, and the fixed end 221 is farther away from the first end face 111 than the free end 222.

[0065] Further, a < c ≤ 1.3Y, and / or, d ≤ b ≤ 1.2Z, c is the length of the folding edge portion 22 along the second direction, a is the distance between the one end of the cladding portion 21 away from the first end surface 111 to the one end of the second connecting portion 32 away from the first end surface 111 in the second direction, Y is the height of the battery cell 1 along the second direction; b is the width of the folding edge portion 22 along the third direction, Z is the thickness of the battery cell 1 along the third direction, d is the width of the second connecting portion 32 along the third direction, wherein; the first direction, the second direction and the third direction are perpendicular to each other.

[0066] By limiting the value of the length c of the folding edge portion 22 along the second direction, when the length c of the folding edge portion 22 along the second direction is small, it can also ensure that the free end 222 of the folding edge portion 22 can extend into the space between the second connecting portion 32 and the battery cell 1, and isolate the battery cell 1 and the adapter 3, while saving materials; when the length c of the folding edge portion 22 along the second direction is large, it can completely cover the battery cell 1 along the second direction through the folding edge portion 22, and the isolation effect of the battery cell 1 and the adapter 3 is better, and it will not interfere with the assembly of the battery cell 1, the insulating film 2, the shell 5 and the cover plate assembly 4.

[0067] By limiting the value of the width b of the folding edge portion 22 along the third direction, the folding edge portion 22 can completely cover the second connecting portion 32 along the third direction, improve the isolation effect, and make the width b of the folding edge portion 22 along the third direction not greater than the thickness of the shell 5 (the thickness of the shell 5 is not greater than 1.2Z), to ensure the smooth assembly of the battery cell.

[0068] In some embodiments, the cover plate assembly 4 includes a cover plate 41, an insulating piece 42 and a pole 43, the pole 43 is arranged on the cover plate 41, and the pole 43 is connected with the second connecting portion 32, the insulating piece 42 is located between the cover plate 41 and the battery cell 1, and the insulating piece 42 is connected with the cover plate 41. It should be noted that the relative movement of the cladding portion 21 and the battery cell 1 is limited by the folding edge portion 22, and there is no need to set a protruding structure on the insulating piece 42 to melt the insulating film 2, which is conducive to improving the space utilization rate inside the shell 5.

[0069] In some embodiments, the insulating piece 42 has a first surface arranged away from the cover plate 41, and the first surface is provided with an abutting portion 421, which abuts against the adapter 3 to fix the adapter 3 through the abutting portion 421, thereby improving the installation stability of the adapter 3.

[0070] Specific to the present embodiment, referring to Figure 3 It can be seen that the abutting portion 421 is a protruding point, and since the purpose of the protruding point is to abut against the adapter 3, the position of the protruding point on the first surface of the insulating piece 42 is not limited, as long as it does not hinder the connection of the adapter 3 and the pole 43.

[0071] In some embodiments, the insulating film 2 further comprises an isolation portion 23, the covering portion 21 is provided with the isolation portion 23 on at least one side in the first direction, and the isolation portion 23 is located between the adapter 3 and the cavity wall of the shell cavity 51 to isolate the adapter 3 from the cavity wall of the shell cavity 51, so that insulation is formed between the adapter 3 and the shell 5.

[0072] Further, the isolation portion 23 comprises a first isolation portion 231 perpendicular to the third direction and / or a second isolation portion 232 perpendicular to the second direction, at least part of the orthographic projection of the adapter 3 is located within the orthographic projection of the first isolation portion 231 in the third direction, and / or at least part of the orthographic projection of the adapter 3 is located within the orthographic projection of the second isolation portion 232 in the second direction.

[0073] When the isolation portion 23 only has the first isolation portion 231, it can only prevent the adapter 3 from contacting the cavity wall of the shell cavity 51 which is arranged perpendicularly to the third direction, thereby ensuring the insulation between the adapter 3 and the shell 5; when the isolation portion 23 only has the second isolation portion 232, it can only prevent the adapter 3 from contacting the cavity wall of the shell cavity 51 which is arranged perpendicularly to the second direction, thereby ensuring the insulation between the adapter 3 and the shell 5; and when the isolation portion 23 has both the first isolation portion 231 and the second isolation portion 232, it can not only prevent the adapter 3 from contacting the cavity wall of the shell cavity 51 which is arranged perpendicularly to the third direction, but also prevent the adapter 3 from contacting the cavity wall of the shell cavity 51 which is arranged perpendicularly to the second direction, thereby achieving better insulation effect.

[0074] For example, in the specific embodiments of the utility model, the isolation portion 23 comprises the first isolation portion 231 and the second isolation portion 232, and the first connecting portion 31 is located between the second isolation portion 232 and the first end surface 111 to isolate the first connecting portion 31 from the cavity wall of the shell cavity 51 through the second isolation portion 232. Further, the second isolation portion 232 is connected with the first isolation portion 231, thereby increasing the strength of the first isolation portion 231 and the second isolation portion 232, avoiding deformation or bending and other problems, and improving the insulation effect.

[0075] In some embodiments, 0 < e ≤ 10 mm, e is the distance between the end of the first isolation portion 231 away from the second isolation portion 232 and the end of the second connecting portion 32 away from the first end surface 111 in the second direction, and in the second direction, the end of the first isolation portion 231 away from the second isolation portion 232 is farther away from the second isolation portion 232 than the end of the second connecting portion 32 away from the first end surface 111, or the end of the first isolation portion 231 away from the second isolation portion 232 is flush with the end of the second connecting portion 32 away from the first end surface 111. By limiting the value of e, the first isolation portion 231 can better isolate the adapter 3 from the cavity wall of the shell cavity 51, thereby achieving better insulation effect, and at the same time, the first isolation portion 231 can be adapted to the existing adapter 3, thereby achieving strong versatility.

[0076] Exemplarily, e can be any value between 0-10mm, such as 0.1mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0077] In some embodiments, 1mm≤g≤10mm, g is the width of the first isolation part 231 along the first direction. By limiting the value of the width g of the first isolation part 231 along the first direction, on the one hand, the first isolation part 231 can be adapted to the existing adapter 3, which has strong versatility, and on the other hand, the distance between the adapter 3 and the cover plate 41 is as small as possible, so as to improve the space utilization rate inside the shell 5.

[0078] Exemplarily, g can be any value between 1mm-10mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0079] In some embodiments, when the cladding part 21 is provided with the first isolation part 231 on both sides along the first direction, the width of the first isolation part 231 located on both sides of the cladding part 21 along the first direction is different. It should be noted that when the battery cell 1 is provided with the adapter 3 on both sides along the first direction, one of the two adapters 3 is a positive adapter and the other is a negative adapter, and only the second connecting part 32 of one of the positive adapter and the negative adapter needs to be bent. Taking the positive adapter as an example, the width of the first isolation part 231 corresponding to the positive adapter along the first direction needs to be slightly larger than the width of the first isolation part 231 corresponding to the negative adapter along the first direction, so as to ensure the insulation between the second connecting part 32 of the positive adapter and the cavity wall of the shell chamber 51. Of course, the negative adapter can also be bent in other embodiments, and at this time, the width of the first isolation part 231 corresponding to the negative adapter along the first direction needs to be slightly larger than the width of the first isolation part 231 corresponding to the positive adapter along the first direction, so as to ensure the insulation between the second connecting part 32 of the negative adapter and the cavity wall of the shell chamber 51.

[0080] In some embodiments, j≤f≤W, f is the width of the second isolation part 232 along the third direction, W is the width of the cladding part 21 along the third direction, and j is the width of the first connecting part 31 along the third direction. By limiting the value of the width f of the second isolation part 232 along the third direction, the second isolation part 232 can better isolate the first connecting part 31 and the cavity wall of the shell chamber 51, and the insulation effect is better, while ensuring the strength of the second isolation part 232, so that the second isolation part 232 is not prone to deformation or bending, etc., and the insulation film 2 is easy to form.

[0081] In some embodiments, 1mm≤k≤10mm, k is the length of the second isolation portion 232 along the first direction. By limiting the value of the length k of the second isolation portion 232 along the first direction, on the one hand, the second isolation portion 232 can be adapted to the existing adapter 3, which has strong versatility, and on the other hand, the distance between the adapter 3 and the cover plate 41 is as small as possible, so as to improve the space utilization rate inside the shell 5.

[0082] For example, k can be any value between 1mm and 10mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0083] In some embodiments, when the cladding portion 21 is provided with the second isolation portion 232 on both sides along the first direction, the length of the second isolation portion 232 on both sides of the cladding portion 21 along the first direction is the same. It should be noted that the second isolation portion 232 is used to isolate the first connecting portion 31 of the adapter 3 and the cavity wall of the shell chamber 51, and the first connecting portion 31 does not need to be bent, so that the length of the second isolation portion 232 on both sides of the cladding portion 21 along the first direction is the same, which facilitates the molding of the insulation film 2.

[0084] In some embodiments, c+n>H, c is the length of the folded edge portion 22 along the second direction, n is the length of the first isolation portion 231 along the second direction, and H is the height of the cladding portion 21 along the second direction, so that the first isolation portion 231 and the folded edge portion 22 cooperate to completely isolate the adapter 3, avoiding the adapter 3 from contacting the cavity wall of the shell chamber 51, and the insulation effect is better.

[0085] In some embodiments, the isolation portion 23 is connected to the cladding portion 21, or the isolation portion 23 can also be connected to the folded edge portion 22. In the embodiments of the present application, the connection position of the isolation portion 23 is not limited, as long as the isolation portion 23 is located between the adapter 3 and the cavity wall of the shell chamber 51 to achieve insulation.

[0086] In other embodiments, when the isolation portion 23 includes the first isolation portion 231 and the second isolation portion 232, in some embodiments, the second isolation portion 232 is connected to the cladding portion 21, and the first isolation portion 231 is connected to the folded edge portion 22. It should be noted that the first isolation portion 231 and the second isolation portion 232 are both in a suspended state, by connecting the second isolation portion 232 to the cladding portion 21 and connecting the first isolation portion 231 to the folded edge portion 22, it is beneficial to alleviate the problem of excessive stress concentration of the cladding portion 21 and the folded edge portion 22, thereby prolonging the service life of the insulation film 2.

[0087] In some embodiments, the isolation portion 23 includes two first isolation portions 231 respectively located on two sides of the adapter 3 along the third direction to isolate both sides of the adapter 3 along the third direction, and the insulation effect is better.

[0088] In other embodiments, the first isolation portion 231 can also be provided to include multiple isolation segments spaced along the second direction. In this way, the adapter 3 and the cavity wall of the shell cavity 51 can be isolated, the use of the insulation film 2 can be reduced, the stress on the covering portion 21 or the folding portion 22 can be reduced, and the service life of the insulation film 2 can be prolonged.

[0089] In some embodiments, the covering portion 21 includes a first covering area 211 perpendicular to the third direction, and the first isolation portion 231 is connected to the first covering area 211.

[0090] In some embodiments, the covering portion 21 includes a second covering area 212 perpendicular to the second direction, and the fixed end 221 of the folding portion 22 is connected to the second covering area 212.

[0091] In some embodiments, the covering portion 21 includes a third covering area 213 perpendicular to the second direction, the third covering area 213 is arranged towards the first end surface 111, and the second isolation portion 232 is connected to the third covering area 213.

[0092] It should be noted that connecting the folding portion 22, the first isolation portion 231 and the second isolation portion 232 to different covering areas of the covering portion 21 not only facilitates the molding of the insulation film 2, but also avoids local stress concentration of the covering portion 21, and is also conducive to improving the strength of the covering portion 21, the folding portion 22, the first isolation portion 231 and the second isolation portion 232, and avoiding deformation or bending, and the insulation effect is better and the service life is longer.

[0093] Exemplarily, in the specific embodiments of the utility model, the covering portion 21 includes the first covering area 211, the second covering area 212 and the third covering area 213, the second covering area 212 and the third covering area 213 are oppositely arranged along the second direction, the first covering area 211 is located between the second covering area 212 and the third covering area 213, and the first covering area 211 connects the second covering area 212 and the third covering area 213, thereby facilitating the overall molding of the insulation film 2, and the strength of the covering portion 21, the folding portion 22, the first isolation portion 231 and the second isolation portion 232 is higher.

[0094] Further, the first covering area 211 is provided with two, the two first covering areas 211 are oppositely arranged along the third direction, and along the third direction, the two first covering areas 211 are respectively located on the two sides of the second covering area 212 and the third covering area 213; each first covering area 211 is provided with a first isolation part 231 on the two sides along the first direction; further, the second covering area 212 and the third covering area 213 are provided with a second isolation part 232 on the two sides along the first direction. In this way, the adapter 3 of the positive polarity and the adapter 3 of the negative polarity arranged on the two sides of the battery cell 1 along the first direction can be isolated, and the insulation effect is better.

[0095] Exemplarily, in the specific embodiment of the utility model, the cladding part 21 is provided with one folded edge part 22 on the two sides along the first direction, the fixed end 221 of the two folded edge parts 22 is connected to the second covering area 212, and a < c ≤ Y, which can ensure the insulation effect between the folded edge part 22, the second connecting part 32 and the battery cell 1, and facilitate the fixation of the free end 222 of the folded edge part 22.

[0096] Exemplarily, in another specific embodiment of the utility model, the cladding part 21 is provided with one folded edge part 22 on the two sides along the first direction, the fixed end 221 of the two folded edge parts 22 is connected to the second covering area 212, and Y < c ≤ 1.3Y, so that the folded edge part 22 can completely cover the battery cell 1 in the second direction, and the insulation effect is better.

[0097] In other embodiments, the cladding part 21 can also be provided with two folded edge parts 22 on the two sides along the first direction, the fixed end 221 of the two folded edge parts 22 is connected to the second covering area 212 and the third covering area 213 on the same side of the cladding part 21 along the first direction, the free end 222 of the two folded edge parts 22 is spaced apart along the second direction, and 0 < c ≤ a, the free end 222 of the four folded edge parts 22 is connected to the cladding part 21 through the connecting piece 6, which can better limit the relative movement of the cladding part 21 and the battery cell 1, and the folded edge part 22 connected to the third covering area 213 is located between the second connecting part 32 and the battery cell 1, which also plays an insulation role.

[0098] In some embodiments, the length of the cladding part 21 along the first direction is L, X ≤ L ≤ X + 4mm, X is the length of the battery cell 11 along the first direction, and further, on the basis of leaving assembly gap and manufacturing tolerance, the cladding part 21 can completely cover the battery cell 1 along the first direction, and the insulation effect is improved.

[0099] In some embodiments, the length of the covering portion 21 along the second direction is H, Y-3mm≤H≤Y+2mm, Y being the height of the battery cell 11 along the second direction. It should be noted that since the insulating film 2 has a certain elasticity, H is slightly less than Y, which can also make the covering portion 21 completely cover the battery cell 1, at which time the covering portion 21 is more tightly attached to the battery cell 1, and to some extent can also limit the relative movement of the covering portion 21 and the battery cell 1; when H is slightly greater than Y, it is more convenient to assemble the covering portion 21 and the battery cell 1. By limiting the length H of the covering portion 21 along the second direction, on the basis of making the covering portion 21 completely cover the battery cell 1 along the second direction, it also has the effect of improving the utilization rate of the internal space of the shell 5.

[0100] In some embodiments, the length of the covering portion 21 along the third direction is W, Z≤W≤120%Z, Z being the thickness of the battery cell 11 along the third direction, and further making the covering portion 21 be able to match the existing battery cell 1 on the basis of making the covering portion 21 completely cover the battery cell 1 along the third direction, and having stronger versatility.

[0101] In some embodiments, as shown in Figure 6 , the covering portion 21 is rectangular when laid out flat, and the two ends of the rectangular covering portion 21 are connected to enclose the film chamber.

[0102] Exemplarily, in the specific embodiments of the utility model, the two ends of the rectangular covering portion 21 are arranged in overlap, in other words, the third covering area 213 is provided with two, and the two third covering areas 213 are arranged in overlap.

[0103] When the insulating film 2 is in the initial state, the covering portion 21, the folded edge portion 22, the first isolation portion 231 and the second isolation portion 232 are all in the same plane, and the insulating film 2 as a whole is in the form of a sheet.

[0104] Further, the assembly process of the battery cell 1 and the insulating film 2 is as follows:

[0105] 1) as shown in Figure 7 , fold the two folded edge portions 22 so that the folded edge portions 22 are perpendicular to the first direction;

[0106] 2) as shown in Figure 8 , or along the third direction as shown in Figure 9 , the battery cell 1 is assembled between the two folded edge portions 22;

[0107] 3) as shown in Figure 10 and Figure 11 , bend the covering portion 21 to enclose the film chamber and accommodate the battery cell 1 in the film chamber;

[0108] 4) as shown in Figure 12As shown, the free end 222 of the folding edge portion 22 is adhered and fixed to the wrapping portion 21 by using a tape to limit the relative movement between the insulation film 2 and the battery cell 1, and the end of the wrapping portion 21 is adhered and fixed to ensure that the wrapping portion 21 will not be scattered.

[0109] In other embodiments, the two ends of the rectangular wrapping portion 21 can also be connected head to tail to form a film chamber.

[0110] The embodiment also provides a power consuming device comprising the battery cell described above.

[0111] Note that the above only describes the preferred embodiments of the present application and the technical principles applied herein. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A battery cell, characterized by The battery monomer comprises: an electric core (1); an insulation film (2) comprising a covering part (21) and a folding part (22), the covering part (21) is used to form a film chamber, the electric core (1) is accommodated in the film chamber, the film chamber penetrates through the covering part (21) along a first direction, and the folding part (22) is arranged on at least one side of the covering part (21) along the first direction, and the folding part (22) is configured to limit the relative movement of the covering part (21) and the electric core (1).

2. The battery cell of claim 1, wherein, Further comprising an adapter (3), the electric core (1) comprises an electric core body (11) and a tab (12), the electric core body (11) has a first end surface (111) perpendicular to a second direction, and the tab (12) is led out from the first end surface (111); the adapter (3) comprises a first connecting part (31) and a second connecting part (32), the first connecting part (31) is connected with the tab (12), and at least part of the folding part (22) is located between the second connecting part (32) and the electric core body (11), wherein the second direction and the first direction are perpendicular to each other.

3. The battery cell of claim 2, wherein, The folding part (22) has a fixed end (221) and a free end (222), the fixed end (221) is connected with the covering part (21), and the free end (222) is connected with the covering part (21) through a connecting piece (6).

4. The battery cell of claim 3, wherein, The connecting piece (6) is a glue paper.

5. The battery cell of claim 3, wherein, The fixed end (221) and the free end (222) are oppositely arranged along the second direction, and the fixed end (221) is farther away from the first end surface (111) than the free end (222); wherein a < c ≤ 1.3Y, c is the length of the folding part (22) along the second direction, a is the distance between one end of the covering part (21) away from the first end surface (111) and one end of the second connecting part (32) away from the first end surface (111) in the second direction, and Y is the height of the electric core (1) along the second direction; and / or, d ≤ b ≤ 1.2Z, b is the width of the folding part (22) along a third direction, Z is the thickness of the electric core (1) along the third direction, and d is the width of the second connecting part (32) along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

6. The battery cell of claim 2, wherein, The battery monomer further comprises a cover plate assembly (4), the cover plate assembly (4) comprises a cover plate (41), an insulation piece (42) and a pole (43), the pole (43) is arranged on the cover plate (41), the pole (43) is connected with the second connecting part (32), the insulation piece (42) is located between the cover plate (41) and the electric core (1), and the insulation piece (42) is connected with the cover plate (41).

7. The battery cell of claim 6, wherein, The insulation piece (42) has a first surface arranged away from the cover plate (41), the first surface is provided with an abutting part (421), and the abutting part (421) abuts against the adapter (3).

8. The battery cell of any one of claims 2 to 7, wherein, The battery cell further comprises a shell (5) including a shell cavity (51), the electric core (1) and the insulation film (2) are accommodated in the shell cavity (51); The insulation film (2) further comprises an isolation part (23), the cladding part (21) is provided with the isolation part (23) on at least one side in the first direction, the isolation part (23) is located between the adapter (3) and the cavity wall of the shell cavity (51); the isolation part (23) comprises a first isolation part (231) perpendicular to a third direction and / or a second isolation part (232) perpendicular to the second direction; in the third direction, at least part of the orthographic projection of the adapter (3) is located in the orthographic projection of the first isolation part (231); and / or, in the second direction, at least part of the orthographic projection of the adapter (3) is located in the orthographic projection of the second isolation part (232), wherein the first direction, the second direction and the third direction are perpendicular to each other.

9. The battery cell of claim 8, wherein, The isolation part (23) is connected to the cladding part (21); or, the isolation part (23) is connected to the folding part (22); or, when the isolation part (23) comprises the first isolation part (231) and the second isolation part (232), the second isolation part (232) is connected to the cladding part (21), and the first isolation part (231) is connected to the folding part (22).

10. The battery cell of claim 8, wherein, The isolation part (23) comprises two first isolation parts (231), and the two first isolation parts (231) are respectively located on both sides of the adapter (3) in the third direction; and / or, the first isolation part (231) comprises a plurality of isolation segments, and the plurality of isolation segments are arranged at intervals in the second direction.

11. The battery cell of claim 8, wherein, The isolation part (23) comprises a first isolation part (231) and a second isolation part (232), the first connecting part (31) is located between the second isolation part (232) and the first end face (111); the second isolation part (232) and the first isolation part (231) are connected, wherein 0 And / or, 1mm≤g≤10mm, g is the width of the first isolation part (231) in the first direction; And / or, j≤f≤W, f is a width of the second isolation portion (232) along the third direction, W is a width of the cladding portion (21) along the third direction, j is a width of the first connection portion (31) along the third direction; And / or, 1mm≤k≤10mm, k is a length of the second isolation portion (232) along the first direction; And / or, c+n>H, c is a length of the folding portion (22) along the second direction, n is a length of the first isolation portion (231) along the second direction, H is a height of the cladding portion (21) along the second direction.

12. The battery cell of claim 8, wherein, The cladding portion (21) comprises a first covering area (211) perpendicular to the third direction and a second covering area (212) and a third covering area (213) oppositely arranged along the second direction, the third covering area (213) is arranged towards the first end surface (111), the first covering area (211) is located between the second covering area (212) and the third covering area (213), and the first covering area (211) connects the second covering area (212) and the third covering area (213), wherein the fixed end (221) of the folding portion (22) is connected with the second covering area (212), the first isolation portion (231) is connected with the first covering area (211), and the second isolation portion (232) is connected with the third covering area (213).

13. The battery cell of any one of claims 1 to 7, wherein, The cladding portion (21) comprises a second covering area (212) perpendicular to the second direction, and the second covering area (212) is connected with the fixed end (221) of the folding portion (22), wherein the second direction and the first direction are perpendicular to each other.

14. The battery cell of claim 1, wherein, A length of the cladding portion (21) along the first direction is L, X≤L≤X+4mm, X is a length of the battery cell (1) along the first direction; and / or, A length of the cladding portion (21) along the second direction is H, Y-3mm≤H≤Y+2mm, Y is a height of the battery cell (1) along the second direction; and / or, A length of the cladding portion (21) along the third direction is W, Z≤W≤120%Z, Z is a thickness of the battery cell (1) along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

15. An electrical device, characterized by The battery cell comprises the battery cell according to any one of claims 1 to 14.

Images