Battery monomer and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery monomer and electric equipment, the battery monomer comprises a battery cell, a top cover plate provided with a pole, a substrate positioned between the top cover plate and the battery cell and sleeved outside the pole, and an insulating film wrapping the battery cell, the pole is provided with a connecting surface facing the battery cell, the insulating film comprises a first diaphragm, and the first diaphragm is provided with a second diaphragm. A receding hole is formed in the position, corresponding to the pole, of the first diaphragm, the orthographic projection of the connecting face on the first diaphragm is located in the receding hole, the substrate is provided with a first surface facing the battery cell, and a first positioning protrusion and a second positioning protrusion are arranged at the two corners of the first surface respectively. The first positioning protrusions and the second positioning protrusions are arranged in a staggered mode in the first direction and the second direction, the first membrane located on the first surface is limited between the first positioning protrusions and the second positioning protrusions in the first direction and the second direction, and the first direction and the second direction are the width direction and the length direction of the substrate respectively. Therefore, the positioning precision of the insulating film is improved.

Description

Technical Field

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

[0002] In the manufacturing process of batteries, usually the battery cells are first coated with an insulating film, then loaded into the battery shell, and finally the battery top cover and the battery shell are fully welded and packaged. Among them, the coating effect of the insulating film directly determines whether the battery cells can be quickly and effectively loaded into the battery shell.

[0003] In order to improve the coating effect of the insulating film, it is necessary to position the insulating film before coating. In the prior art, the two pole holes on the insulating film are usually respectively mounted on a corresponding pole on the battery top cover, thereby achieving the positioning of the insulating film. However, in order to avoid the problem of hot melting of the insulating film at the edge of the pole hole during the welding of the battery cell soft connection, the aperture of the pole hole is usually larger than the diameter of the pole, thereby reducing the positioning accuracy of the insulating film, resulting in problems such as tilting, unevenness or uneven force after the insulating film is coated on the battery cell, making it impossible to quickly and effectively load the battery cell into the battery shell, and even laser leakage or full welding abnormalities when the battery top cover and the battery shell are fully welded, ultimately reducing the safety of the battery.

[0004] Therefore, it is urgent to propose a battery cell and an electrical device to solve the above technical problems. Utility Model Content

[0005] The first object of the utility model is to provide a battery cell that can effectively improve the positioning accuracy of the insulating film.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery cell, comprising:

[0008] Battery cells;

[0009] A top cover sheet is provided with a pole, and the pole has a connection surface arranged toward the battery cell;

[0010] The base plate is located between the top cover sheet and the battery cell and is sleeved outside the pole;

[0011] An insulating film covers the battery cell, the insulating film comprises a first diaphragm, a avoidance hole is arranged at a position of the first diaphragm corresponding to the pole, and the orthographic projection of the connection surface on the first diaphragm is located in the avoidance hole;

[0012] Among them, the substrate has a first surface arranged toward the battery cell; a first positioning protrusion and a second positioning protrusion are respectively arranged at two corners of the first surface; the first positioning protrusion and the second positioning protrusion are staggered in the first direction, and the first positioning protrusion and the second positioning protrusion are staggered in the second direction; the first diaphragm is arranged on the first surface; in the first direction, the first diaphragm is limited between the first positioning protrusion and the second positioning protrusion, and in the second direction, the first diaphragm is limited between the first positioning protrusion and the second positioning protrusion, the first direction is the width direction of the substrate, and the second direction is the length direction of the substrate.

[0013] Optionally, a first notch is provided at a position of the first diaphragm corresponding to the first positioning protrusion, and a second notch is provided at a position of the first diaphragm corresponding to the second positioning protrusion; in the first direction, the side wall of the first notch contacts the first positioning protrusion, and the side wall of the second notch contacts the second positioning protrusion; in the second direction, the side wall of the first notch contacts the first positioning protrusion, and the side wall of the second notch contacts the second positioning protrusion.

[0014] Optionally, an adhesive layer is provided on the first surface, and the first film is provided on the adhesive layer.

[0015] Optionally, the battery cell includes a battery cell body and a pole ear extending from a first end face of the battery cell body, the pole ear is located between the battery cell body and the substrate, and the pole ear has a bending portion; in a first direction, the bending portion and the first positioning protrusion are respectively located on both sides of a center line of the battery cell body, and the first positioning protrusion is in contact with the first end face, and an extension direction of the center line of the battery cell body is perpendicular to the first direction and perpendicular to the second direction.

[0016] Optionally, the first surface is provided with a third positioning protrusion and a fourth positioning protrusion, the third positioning protrusion and the first positioning protrusion are arranged opposite to each other along the first direction, and the third positioning protrusion and the second positioning protrusion are arranged opposite to each other along the second direction, and the fourth positioning protrusion and the first positioning protrusion are arranged opposite to each other along the second direction; the fourth positioning protrusion and the second positioning protrusion are arranged opposite to each other along the first direction; in the first direction, the first diaphragm is limited between the third positioning protrusion and the fourth positioning protrusion, and in the second direction, the first diaphragm is limited between the third positioning protrusion and the fourth positioning protrusion.

[0017] Optionally, a third notch is provided at a position of the first diaphragm corresponding to the third positioning protrusion, and a fourth notch is provided at a position of the first diaphragm corresponding to the fourth positioning protrusion; in the first direction, the side wall of the third notch contacts the third positioning protrusion, and the side wall of the fourth notch contacts the fourth positioning protrusion; in the second direction, the side wall of the third notch contacts the third positioning protrusion, and the side wall of the fourth notch contacts the fourth positioning protrusion.

[0018] Optionally, a length of the fourth positioning protrusion along a third direction is equal to a length of the first positioning protrusion along the third direction, and the third direction is a thickness direction of the substrate.

[0019] Optionally, the battery cell also includes a transfer plate and a flip plate, the transfer plate is arranged on the side of the first membrane facing the battery cell, and the transfer plate is connected to the connecting surface; the flip plate is arranged on the side of the transfer plate facing the battery cell; one end of the flip plate in the second direction is flipably connected to the substrate, and the other end of the flip plate in the second direction is detachably connected to the substrate.

[0020] Optionally, in the first direction, the width of the adapter plate is L1, the width of the base plate is L2, the maximum width of the flip plate is L3, the width of the top cover plate is L4, 0.5mm≤L4-L2≤5mm, 0.5mm≤L2-L1≤4mm, L3<L2, 0.5mm≤L3-L1≤4mm.

[0021] The second purpose of the utility model is to provide an electrical device with higher safety in use.

[0022] To achieve this purpose, the utility model adopts the following technical solutions:

[0023] An electrical device comprises the above-mentioned battery cell.

[0024] Beneficial effects of the utility model:

[0025] The utility model provides a battery cell, wherein a first diaphragm of the insulating film is provided with an avoidance hole corresponding to the position of the pole, and the positive projection of the connection surface of the pole on the top cover sheet on the first diaphragm is located in the avoidance hole; a first positioning protrusion and a second positioning protrusion are respectively provided at two corners of the first surface of the substrate, in a first direction, the first positioning protrusion and the second positioning protrusion are staggered, and the first diaphragm is limited between the first positioning protrusion and the second positioning protrusion, and in a second direction, the first positioning protrusion and the second positioning protrusion are staggered, and the first diaphragm is limited between the first positioning protrusion and the second positioning protrusion, thereby realizing the positioning of the insulating film and avoiding the inability to effectively position the insulating film due to the avoidance hole on the first diaphragm being larger than the pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the assembly structure of the top cover sheet and the base plate provided in the first embodiment;

[0027] Figure 2 is a schematic structural diagram of an insulating film provided in Example 1;

[0028] Figure 3 is a schematic diagram of a rotated cross-sectional structure of a battery cell provided in Example 1 without showing an insulating film;

[0029] Figure 4 is a schematic diagram of the assembly structure of the insulating film and the substrate provided in the first embodiment;

[0030] Figure 5 It is a schematic diagram of the structure of the insulating film provided in the second embodiment.

[0031] In the figure:

[0032] D1, first direction; D2, second direction; D3, third direction;

[0033] 100, battery cell; 110, battery cell body; 111, first end face; 120, pole ear; 121, bending portion; 200, top cover sheet; 210, pole column; 211, connection surface; 220, explosion-proof valve; 230, injection hole; 300, substrate; 310, first surface; 311, first positioning protrusion; 312, second positioning protrusion; 313, third positioning protrusion; 314, fourth positioning protrusion; 410, first diaphragm; 411, avoidance hole; 412, first notch; 413, second notch; 414, third notch; 415, fourth notch; 420, second diaphragm; 430, third diaphragm; 500, adapter; 600, flip plate. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] Embodiment 1

[0039] This embodiment provides a battery cell, which can effectively improve the positioning accuracy of the insulating film.

[0040] Specifically, Figures 1 to 4 As shown, the battery cell includes a battery cell 100, a top cover sheet 200, a substrate 300 and an insulating film, wherein the top cover sheet 200 is provided with a pole 210, and the pole 210 has a connection surface 211 arranged toward the battery cell 100, the substrate 300 is located between the top cover sheet 200 and the battery cell 100, and is sleeved outside the pole 210, the insulating film covers the battery cell 100, and the insulating film includes a first diaphragm 410, and the first diaphragm 410 is provided with an avoidance hole 411 at a position corresponding to the pole 210, and the orthographic projection of the connection surface 211 on the first diaphragm 410 is located in the avoidance hole 411, and the substrate 300 has a first surface 310 arranged toward the battery cell 100; at two corners of the first surface 310 A first positioning protrusion 311 and a second positioning protrusion 312 are respectively provided; the first positioning protrusion 311 and the second positioning protrusion 312 are staggered in the first direction D1, and the first positioning protrusion 311 and the second positioning protrusion 312 are staggered in the second direction D2; the first diaphragm 410 is provided on the first surface 310; in the first direction D1, the first diaphragm 410 is limited between the first positioning protrusion 311 and the second positioning protrusion 312, and in the second direction D2, the first diaphragm 410 is limited between the first positioning protrusion 311 and the second positioning protrusion 312, the first direction D1 is the width direction of the substrate 300, and the second direction D2 is the length direction of the substrate 300.

[0041] Based on the above design, since the first diaphragm 410 of the insulating film is provided with an avoidance hole 411 corresponding to the position of the pole 210, the orthographic projection of the connection surface 211 of the pole 210 on the top cover sheet 200 on the first diaphragm 410 is located in the avoidance hole 411, so there is a problem that the insulating film cannot be positioned. In order to solve the above problem, it is designed that in the first direction D1, the first positioning protrusion 311 and the second positioning protrusion 312 are staggered, and in the second direction D2, the first positioning protrusion 311 and the second positioning protrusion 312 are staggered. So that in the first direction D1, the first diaphragm 410 is limited between the first positioning protrusion 311 and the second positioning protrusion 312, and in the second direction D2, the first diaphragm 410 is limited between the first positioning protrusion 311 and the second positioning protrusion 312, thereby realizing the positioning of the insulating film, and further can effectively improve the coating accuracy of the insulating film on the battery cell 100, so that the battery cell 100 can be quickly and effectively loaded into the battery shell, and can also reduce the probability of laser leakage or full welding abnormalities when the top cover piece 200 and the battery shell are fully welded.

[0042] It should be noted that if Figures 1 to 4 As shown, the number of poles 210 and avoidance holes 411 are both two and they correspond one to one. One of the two poles 210 is a positive pole and the other is a negative pole. The top cover sheet 200 is also provided with an explosion-proof valve 220. When the internal pressure of the single battery is too high, the explosion-proof valve 220 opens to allow the high-temperature and high-pressure substances inside the single battery to be ejected from the explosion-proof valve 220 to improve the safety of the single battery. The top cover sheet 200 is also provided with an injection hole 230, and the electrolyte is injected into the interior of the single battery through the injection hole 230.

[0043] In some embodiments, in order to allow the positioning protrusion to contact the first film in both the first direction D1 and the second direction D2, the positioning protrusion may be designed to be L-shaped, or an L-shaped notch may be formed on the first film. Specifically, in this embodiment, Figures 1 to 4 As shown, a first notch 412 is provided at a position of the first diaphragm 410 corresponding to the first positioning protrusion 311, and a second notch 413 is provided at a position of the first diaphragm 410 corresponding to the second positioning protrusion 312; in the first direction D1, the side wall of the first notch 412 contacts the first positioning protrusion 311, and the side wall of the second notch 413 contacts the second positioning protrusion 312, so that the first positioning protrusion 311 and the second positioning protrusion 312 cooperate to limit the first diaphragm 410 in the first direction D1; in the second direction D2, the side wall of the first notch 412 contacts the first positioning protrusion 311, and the side wall of the second notch 413 contacts the second positioning protrusion 312, so that the first positioning protrusion 311 and the second positioning protrusion 312 cooperate to limit the first diaphragm 410 in the second direction D2.

[0044] In this embodiment, since the two side walls constituting the first notch 412 are in contact with the first positioning protrusion 311, and the two side walls constituting the second notch 413 are in contact with the second positioning protrusion 312, the first diaphragm 410 cannot move along the first direction and along the second direction, thereby achieving the positioning of the first diaphragm 410.

[0045] It should be noted that the insulating film also includes a second diaphragm 420 and a third diaphragm 430 arranged relatively to each other along the first direction D1. In the second direction D2, a side edge of the second diaphragm 420 close to the second notch 413 is flush with the side wall of the second notch 413, and a side edge of the second diaphragm 420 away from the second notch 413 does not exceed the first diaphragm; in the second direction D2, a side edge of the third diaphragm 430 close to the first notch 412 is flush with the side wall of the first notch 412, and a side edge of the third diaphragm 430 away from the first notch 412 does not exceed the first diaphragm.

[0046] In some embodiments, in order to improve the accuracy of positioning the insulating film, as Figures 1 to 4 As shown, the first surface 310 is also provided with a third positioning protrusion 313 and a fourth positioning protrusion 314, the third positioning protrusion 313 and the first positioning protrusion 311 are arranged relatively to each other along the first direction D1, and the third positioning protrusion 313 and the second positioning protrusion 312 are arranged relatively to each other along the second direction D2, the fourth positioning protrusion 314 and the first positioning protrusion 311 are arranged relatively to each other along the second direction D2, and the fourth positioning protrusion 314 and the second positioning protrusion 312 are arranged relatively to each other along the first direction D1; in the first direction D1, the first diaphragm 410 is limited between the third positioning protrusion 313 and the fourth positioning protrusion 314, and in the second direction D2, the first diaphragm 410 is limited between the third positioning protrusion 313 and the fourth positioning protrusion 314.

[0047] In this embodiment, the four corners of the substrate 300 are respectively provided with a first positioning protrusion 311, a second positioning protrusion 312, a third positioning protrusion 313 and a fourth positioning protrusion 314. In the first direction D1, the first diaphragm 410 is not only limited between the first positioning protrusion 311 and the second positioning protrusion 312, but also limited between the third positioning protrusion 313 and the fourth positioning protrusion 314; in the second direction D2, the first diaphragm 410 is not only limited between the first positioning protrusion 311 and the second positioning protrusion 312, but also limited between the third positioning protrusion 313 and the fourth positioning protrusion 314, thereby realizing all-round positioning of the insulating film, so that the insulating film is flatter when covering the battery cell 100 on both sides in the first direction D1, which facilitates the battery cell 100 to be installed in the shell; in addition, since the four corners of the first diaphragm 410 are limited, it can better prevent the first diaphragm 410 from being offset and interfering with the connecting surface 211 of the pole, thereby preventing the welding of the adapter and the pole from being affected.

[0048] It should be noted that, based on the first surface of the substrate 300 having the first positioning protrusion 311 and the second positioning protrusion 312 , the first surface of the substrate 300 may only have the third positioning protrusion or the fourth positioning protrusion 314 to further position the first membrane 410 .

[0049] Specifically in this embodiment, Figures 1 to 4 As shown, a third notch 414 is provided at a position of the first diaphragm 410 corresponding to the third positioning protrusion 313, and a fourth notch 415 is provided at a position of the first diaphragm 410 corresponding to the fourth positioning protrusion 314; in the first direction D1, the side wall of the third notch 414 contacts the third positioning protrusion 313, and the side wall of the fourth notch 415 contacts the fourth positioning protrusion 314, so that the third positioning protrusion 313 and the fourth positioning protrusion 314 cooperate to limit the first diaphragm 410 in the first direction D1; in the second direction D2, the side wall of the third notch 414 contacts the third positioning protrusion 313, and the side wall of the fourth notch 415 contacts the fourth positioning protrusion 314, so that the third positioning protrusion 313 and the fourth positioning protrusion 314 cooperate to limit the first diaphragm 410 in the second direction D2.

[0050] In this embodiment, since the four corners of the first diaphragm 410 are respectively provided with a first notch 412 cooperating with the first positioning protrusion 311, a second notch 413 cooperating with the second positioning protrusion 312, a third notch 414 cooperating with the third positioning protrusion 313, and a fourth notch 415 cooperating with the fourth positioning protrusion 314, all-round positioning of the first diaphragm 410 can be achieved.

[0051] It should be noted that, in the second direction D2, a side edge of the second diaphragm 420 close to the second notch 413 is flush with the side wall of the second notch 413, and a side edge of the second diaphragm 420 close to the third notch 414 is flush with the side wall of the third notch 414; in the second direction D2, a side edge of the third diaphragm 430 close to the first notch 412 is flush with the side wall of the first notch 412, and a side edge of the third diaphragm 430 close to the fourth notch 415 is flush with the side wall of the fourth notch 415.

[0052] In some embodiments, Figures 1 to 4 As shown, the battery cell 100 includes a battery cell body 110 and a pole ear 120 extending from a first end surface 111 of the battery cell body 110, the pole ear 120 is located between the battery cell body 110 and the substrate 300, the pole ear 120 has a bending portion 121, and in a first direction D1, the bending portion 121 and the first positioning protrusion 311 are respectively located on both sides of a center line of the battery cell body 110, and the first positioning protrusion 311 is in contact with the first end surface 111, and the center line of the battery cell body 110 and the first direction D1 are perpendicular to each other and perpendicular to the second direction D2.

[0053] In this embodiment, the top cover sheet 200 is supported by the bent pole ear 120 on one side in the first direction D1, and the top cover sheet 200 is supported by the first positioning protrusion 311 on the other side in the first direction D1 to prevent the top cover sheet 200 of the battery cell having one battery cell 100 from tilting.

[0054] Furthermore, the length of the fourth positioning protrusion 314 along the third direction D3 is equal to the length of the first positioning protrusion 311 along the third direction D3. Figure 3 As shown, the third direction D3 is the thickness direction of the substrate 300, that is, the fourth positioning protrusion 314 can also contact the first end surface 111, so that the fourth positioning protrusion 314 can also support the top cover piece 200, reducing the probability of the top cover piece 200 tilting.

[0055] It should be noted that the second positioning protrusion 312 and the third positioning protrusion 313 can be in contact with the first end surface 111, or there can be a gap between them. Specifically, it is only necessary to ensure that when the tab is bent to allow the substrate to be placed on the first end surface 111, the second positioning protrusion 312 and the third positioning protrusion 313 do not interfere with the battery cell 100.

[0056] Optionally, the length of the first positioning protrusion 311 in the second direction D2 is 2 mm-6 mm. Exemplarily, the length of the first positioning protrusion 311 in the second direction D2 may be 2 mm, 4 mm or 6 mm, etc. The lengths of the second positioning protrusion 312, the third positioning protrusion 313 and the fourth positioning protrusion 314 in the second direction D2 are all equal to the length of the first positioning protrusion 311 in the second direction D2 to ensure the positioning accuracy of the insulating film in the first direction D1.

[0057] Optionally, the width of the first positioning protrusion 311 in the first direction D1 is greater than 1.5 mm. Exemplarily, the width of the first positioning protrusion 311 in the first direction D1 may be 1.5 mm, 2.0 mm or 2.5 mm, etc. The widths of the second positioning protrusion 312, the third positioning protrusion 313 and the fourth positioning protrusion 314 in the first direction D1 are all equal to the width of the first positioning protrusion 311 in the first direction D1, and, in the first direction D1, the spacing between the first positioning protrusion 311 and the third positioning protrusion 313 is L5, and in the first direction D1, the spacing between the second positioning protrusion 312 and the fourth positioning protrusion 314 is L6, L5≤L3, L6≤L3, ensuring that the flip plate 600 can be flipped smoothly while ensuring the positioning accuracy of the insulating film in the second direction D2.

[0058] Furthermore, in order to prevent the top cover sheet 200 of a battery cell having one battery cell 100 from warping, and to make the connection between the first diaphragm and the substrate more secure, an adhesive layer (not shown in the figure) is provided on the first surface 310, and the first diaphragm 410 is provided on the adhesive layer to fix the first diaphragm 410 on the first surface 310 to prevent relative displacement of the insulating film after being coated on the battery cell 100, so that the insulating film is coated more smoothly and it is more convenient to put into the shell; in addition, since the insulating film is coated on the outside of the battery cell 100, for a battery cell having one battery cell 100, the design of sticking the first diaphragm 410 on the first surface 310 can pull the top cover sheet 200 and prevent the top cover sheet 200 from warping.

[0059] In some embodiments, Figures 1 to 4 As shown, the battery cell also includes a transfer sheet 500 and a flip plate 600. The transfer sheet 500 is arranged on the side of the first membrane 410 facing the battery cell 100, and the transfer sheet 500 is connected to the connecting surface 211; the flip plate 600 is arranged on the side of the transfer sheet 500 facing the battery cell 100; one end of the flip plate 600 in the second direction D2 is flippably connected to the substrate 300, and the other end of the flip plate 600 in the second direction D2 is detachably connected to the substrate 300, and the substrate 300 and the flip plate 600 are both components with insulating properties such as plastic parts.

[0060] In this embodiment, by designing the flip plate 600 to cover the pole ear and the adapter plate 500, the adapter plate 500, the pole ear and the battery cell 100 can be insulated; and the flip plate 600 is clamped between the part of the pole ear used to connect with the adapter plate 500 and the first end face, which can prevent the pole ear from being inserted upside down.

[0061] Further, in the first direction D1, the width of the adapter sheet 500 is L1, the width of the substrate 300 is L2, the maximum width of the flip plate 600 is L3, the width of the top cover sheet 200 is L4, 0.5 mm ≤ L4-L2 ≤ 5 mm, 0.5 mm ≤ L2-L1 ≤ 4 mm, and illustratively, the width of the top cover sheet 200 is 0.5 mm, 1 mm, 2 mm, or 5 mm greater than the width of the substrate 300, and the width of the substrate 300 is 0.5 mm, 1 mm, 2 mm, or 4 mm greater than the width of the adapter sheet 500, so that the top cover sheet 200 and the adapter sheet 500 are aligned with each other. 00 are separated by the substrate 300 to achieve a good insulation effect; L3<L2, that is, the maximum width of the flip plate 600 is smaller than the width of the substrate 300, which prevents the flip plate 600 from squeezing the pole ear 120 when flipping relative to the substrate 300, and has the effect of preventing the pole ear 120 from tearing; 0.5mm≤L3-L1≤4mm, exemplarily, the maximum width of the flip plate 600 is larger than the width of the adapter 500 by 0.5mm, 1mm, 2mm or 4mm, etc., so that the flip plate 600 has a good insulation effect on the side surface of the adapter 500 facing the battery cell 100.

[0062] Optionally, the flip plate 600 is flipably connected to the substrate 300 via a bending portion (not shown in the figure), and the structural strength of the flip plate 600 and the structural strength of the substrate 300 are both greater than the structural strength of the bending portion. For example, the thickness of the bending portion is smaller than the thickness of the flip plate 600, and the thickness of the bending portion is smaller than the thickness of the substrate 300; or, a plurality of through holes are spaced apart on the bending portion.

[0063] Optionally, a slot is provided on the first surface 310 of the substrate 300 , and a buckle is provided on the flip plate 600 , which is detachably inserted into the slot to achieve detachable connection between the other end of the flip plate 600 in the second direction D2 and the substrate 300 .

[0064] Alternatively, if Figures 1 to 4 As shown, there are two flip plates 600 , and in the second direction D2 , the two flip plates 600 are respectively located on two opposite sides of the substrate 300 .

[0065] Alternatively, if Figures 1 to 4As shown, the insulating film also includes a second diaphragm 420, a third diaphragm 430, a fourth diaphragm (not shown in the figure) and a fifth diaphragm (not shown in the figure), wherein the first diaphragm 410 is respectively connected to the second diaphragm 420 and the third diaphragm 430 on two opposite sides in the first direction D1, and the second diaphragm 420 and the third diaphragm 430 are respectively coated on two opposite surfaces of the battery cell body 110 in the first direction D1; the fourth diaphragm and the fifth diaphragm are both arranged opposite to the first diaphragm 410 in the third direction D3, the fourth diaphragm and the fifth diaphragm are stacked and coated on the surface of the battery cell body 110 away from the first end face 111, and the second diaphragm 420 is connected to the fourth diaphragm, and the fifth diaphragm is connected to the third diaphragm 430.

[0066] This embodiment also provides an electrical device, which includes the above-mentioned battery cell. The insulating film of the battery cell is coated on the battery core 100 with high position accuracy, which is beneficial to improving the safety of the battery cell. Therefore, the electrical device using the above-mentioned battery cell has high safety.

[0067] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery cell, characterized in that: include: Battery cell (100); A top cover sheet (200) is provided with a pole (210), wherein the pole (210) has a connection surface (211) arranged toward the battery cell (100); A substrate (300) is located between the top cover sheet (200) and the battery core (100), and is sleeved outside the pole (210); An insulating film covering the battery cell (100), the insulating film comprising a first diaphragm (410), a avoidance hole (411) being provided at a position of the first diaphragm (410) corresponding to the pole (210), and an orthographic projection of the connection surface (211) on the first diaphragm (410) being located within the avoidance hole (411); The substrate (300) has a first surface (310) disposed toward the battery cell (100); a first positioning protrusion (311) and a second positioning protrusion (312) are respectively disposed at two corners of the first surface (310); the first positioning protrusion (311) and the second positioning protrusion (312) are staggered in a first direction (D1), and the first positioning protrusion (311) and the second positioning protrusion (312) are staggered in a second direction (D2); the first diaphragm (410) is disposed On the first surface (310); in the first direction (D1), the first diaphragm (410) is limited between the first positioning protrusion (311) and the second positioning protrusion (312), and in the second direction (D2), the first diaphragm (410) is limited between the first positioning protrusion (311) and the second positioning protrusion (312), the first direction (D1) is the width direction of the substrate (300), and the second direction (D2) is the length direction of the substrate (300).

2. The battery cell according to claim 1, characterized in that: A first notch (412) is provided at a position of the first diaphragm (410) corresponding to the first positioning protrusion (311), and a second notch (413) is provided at a position of the first diaphragm (410) corresponding to the second positioning protrusion (312); in the first direction (D1), a side wall of the first notch (412) contacts the first positioning protrusion (311), and a side wall of the second notch (413) contacts the second positioning protrusion (312); in the second direction (D2), a side wall of the first notch (412) contacts the first positioning protrusion (311), and a side wall of the second notch (413) contacts the second positioning protrusion (312).

3. The battery cell according to claim 1, characterized in that: The first surface (310) is provided with an adhesive layer, and the first film (410) is provided on the adhesive layer.

4. The battery cell according to claim 1, characterized in that: The battery cell (100) comprises a battery cell body (110) and a pole ear (120) extending from a first end surface (111) of the battery cell body (110); the pole ear (120) is located between the battery cell body (110) and the substrate (300); the pole ear (120) has a bending portion (121); in the first direction (D1), the bending portion (121) and the first positioning protrusion (311) are respectively located on both sides of a center line of the battery cell body (110), and the first positioning protrusion (311) is in contact with the first end surface (111); the extension direction of the center line of the battery cell body (110) is perpendicular to the first direction and perpendicular to the second direction.

5. The battery cell according to any one of claims 1 to 4, characterized in that: The first surface (310) is provided with a third positioning protrusion (313) and a fourth positioning protrusion (314); the third positioning protrusion (313) and the first positioning protrusion (311) are arranged opposite to each other along the first direction (D1), and the third positioning protrusion (313) and the second positioning protrusion (312) are arranged opposite to each other along the second direction (D2); the fourth positioning protrusion (314) and the first positioning protrusion (311) are arranged opposite to each other along the second direction (D2); the fourth positioning protrusion (314) and the second positioning protrusion (312) are arranged opposite to each other along the first direction (D1); in the first direction (D1), the first diaphragm (410) is limited between the third positioning protrusion (313) and the fourth positioning protrusion (314), and in the second direction (D2), the first diaphragm (410) is limited between the third positioning protrusion (313) and the fourth positioning protrusion (314).

6. The battery cell according to claim 5, characterized in that: A third notch (414) is provided at a position of the first diaphragm (410) corresponding to the third positioning protrusion (313), and a fourth notch (415) is provided at a position of the first diaphragm (410) corresponding to the fourth positioning protrusion (314); in the first direction (D1), a side wall of the third notch (414) contacts the third positioning protrusion (313), and a side wall of the fourth notch (415) contacts the fourth positioning protrusion (314); in the second direction (D2), a side wall of the third notch (414) contacts the third positioning protrusion (313), and a side wall of the fourth notch (415) contacts the fourth positioning protrusion (314).

7. The battery cell according to claim 6, characterized in that: The length of the fourth positioning protrusion (314) along the third direction (D3) is equal to the length of the first positioning protrusion (311) along the third direction (D3), and the third direction (D3) is the thickness direction of the substrate (300).

8. The battery cell according to any one of claims 1 to 4, characterized in that: The battery cell further comprises a transfer sheet (500) and a flip plate (600); the transfer sheet (500) is arranged on a side of the first membrane (410) facing the battery cell (100), and the transfer sheet (500) is connected to the connection surface (211); the flip plate (600) is arranged on a side of the transfer sheet (500) facing the battery cell (100); one end of the flip plate (600) in the second direction (D2) is flipably connected to the substrate (300), and the other end of the flip plate (600) in the second direction (D2) is detachably connected to the substrate (300).

9. The battery cell according to claim 8, characterized in that: In the first direction (D1), the width of the adapter sheet (500) is L1, the width of the base plate (300) is L2, the maximum width of the flip plate (600) is L3, the width of the top cover sheet (200) is L4, 0.5 mm ≤ L4-L2 ≤ 5 mm, 0.5 mm ≤ L2-L1 ≤ 4 mm, L3 < L2, 0.5 mm ≤ L3-L1 ≤ 4 mm.

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

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