Battery cell, soft package battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery cell, a soft package battery and electric equipment. Wherein the battery cell comprises a body and at least one first tab, the first tab is connected to the body, at least part of the first tab is located outside the body, a rigid first supporting piece is arranged in the body, one side of the first supporting piece exceeds the body and is connected with a first output tab, and the first tab is electrically connected with the first output tab. Or, a first rigid supporting piece is arranged in the battery cell, and the first supporting piece is made of an insulating material. By arranging the rigid first supporting piece in the battery cell, the overall strength of the battery cell can be effectively improved, so that the situation of battery cell deformation is reduced, the size of the battery cell can be further increased, and the capacity of the single battery is improved.

Description

Technical Field

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

[0002] Soft-pack batteries have the advantages of light weight, large capacity and high safety performance, and have gradually become the main choice of power source for most electronic devices. Soft-pack batteries include a shell and a battery cell, and the battery cell is encapsulated in the shell. The battery cell includes a positive electrode sheet, a separator and a negative electrode sheet, and the battery cell is stacked in the order of a separator, a negative electrode sheet, a separator, a positive electrode sheet, and a separator.

[0003] At present, in order to achieve large capacity and high energy density of soft-pack batteries, the size of the battery cell needs to be increased. However, as the size of the battery cell increases, the battery cell is prone to deformation. Utility Model Content

[0004] The utility model aims to provide a battery cell, a soft-pack battery and an electrical device, aiming to solve the technical problem that the existing soft-pack battery is prone to deformation after the size of the battery increases.

[0005] In the first aspect, the present application provides a battery cell, comprising a body and at least one first pole ear, wherein the first pole ear is connected to the body, and at least a portion of the first pole ear is located outside the body, and a first rigid support member is disposed inside the body, and one side of the first support member extends beyond the body and is connected to a first output pole ear, and the first pole ear is electrically connected to the first output pole ear.

[0006] Optionally, the first support member is made of metal.

[0007] Optionally, the first support member has two first surfaces that are opposite to each other in the thickness direction thereof, and a first insulating layer is disposed on at least one of the first surfaces.

[0008] Optionally, the first output pole ear is made of metal.

[0009] Optionally, the battery cell also includes at least one second pole ear, which is connected to the body, at least part of the second pole ear is located outside the body, the polarity of the second pole ear is opposite to the polarity of the first pole ear, the first pole ear is electrically isolated from the second pole ear, and a rigid second support member is provided inside the body, one side of the second support member extends beyond the body and is connected to a second output pole ear, and the second pole ear is electrically connected to the second output pole ear.

[0010] Optionally, the first output pole tab and the second output pole tab are respectively located on opposite sides of the battery core in a first direction, and the first direction is perpendicular to the thickness direction of the body.

[0011] Optionally, the first output electrode tab and the second output electrode tab are located on the same side of the battery cell in the first direction.

[0012] Optionally, the main body includes a first pole piece, a diaphragm and a second pole piece, the diaphragm is bent in a Z shape to form a first accommodating cavity, a second accommodating cavity and multiple pole piece accommodating cavities, the first support member is accommodated in the first accommodating cavity, the second support member is accommodated in the second accommodating cavity, and each pole piece accommodating cavity accommodates the first pole piece or the second pole piece, wherein the first pole piece and the second pole piece are arranged alternately at intervals, the first pole piece is provided with a first pole ear, and the second pole piece is provided with a second pole ear.

[0013] Optionally, the first pole piece has a first active material layer, the second pole piece has a second active material layer, and at least one side of the first support member in its length direction exceeds the first active material layer or the second active material layer by 0.5 to 5 mm.

[0014] Optionally, at least one side of the first support member in its width direction exceeds the first active material layer or the second active material layer by 0.5 to 5 mm.

[0015] In a second aspect, the present application provides another battery cell, comprising a main body and at least one first pole ear, wherein the first pole ear is connected to the main body, at least a portion of the first pole ear is located outside the main body, and a first rigid support member is disposed inside the main body, and the first support member is made of insulating material.

[0016] In a third aspect, the present application provides a soft-pack battery, which includes a shell and the battery cell described in the first aspect, the battery cell is encapsulated in the shell, and the first output tab passes through the shell.

[0017] In a fourth aspect, the present application provides another soft-pack battery, which includes a shell and the battery cell described in the second aspect, and the battery cell is encapsulated in the shell.

[0018] In a fifth aspect, the present application provides an electrical device comprising at least one of the above-mentioned soft-pack batteries.

[0019] The beneficial effects of the battery cell, soft pack battery and electrical equipment provided by the utility model are:

[0020] In the battery cell described in the first aspect, by providing a rigid first support member inside the body of the battery cell, the overall strength of the battery cell can be effectively improved, thereby reducing the deformation of the battery cell, and further increasing the size of the battery cell to increase the capacity of the single battery. This battery cell is suitable for soft-pack batteries. In existing soft-pack batteries, generally, the pole ear will eventually be welded to a metal sheet, and the metal sheet is exposed from the soft-pack battery for electrical connection to the external structure. In this battery cell, the first pole ear is electrically connected to the first output pole ear, that is, the first output pole ear acts as an existing metal sheet, and the first output pole ear is connected to the side of the first support member that exceeds the body, which can improve the stability of the first output pole ear, thereby improving the packaging effect of the soft-pack battery.

[0021] In the battery cell described in the second aspect, similarly, by providing a rigid first support member inside the battery cell, the overall strength of the battery cell can be effectively improved, thereby reducing the occurrence of battery cell deformation. In addition, by using an insulating material to make the first support member, the risk of short circuit in the battery cell can be effectively reduced.

[0022] Since the soft-pack battery provided in the present application adopts any one of the above-mentioned battery cells, the size of the soft-pack battery can be further increased, thereby making the soft-pack battery have a larger capacity.

[0023] The electrical equipment provided in the present application effectively improves the practicality of the electrical equipment because it adopts the above-mentioned soft-pack battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A cross-sectional view of a battery cell (without the diaphragm) provided in an embodiment of the utility model;

[0026] Figure 2 A schematic structural diagram of a first support member provided in an embodiment of the utility model;

[0027] Figure 3 A schematic diagram of the structure of a battery cell provided in an embodiment of the utility model;

[0028] Figure 4 A schematic diagram of the structure of a soft-pack battery provided in an embodiment of the utility model;

[0029] Figure 5 This is another structural schematic diagram of a soft-pack battery provided in an embodiment of the utility model.

[0030] Among them, the reference numerals in the figure are:

[0031] 100, battery cell; 10, body; 20, first support member;

[0032] 30. second support member; 40. first pole tab; 50. second pole tab;

[0033] 11. diaphragm; 12. first pole piece; 13. second pole piece;

[0034] 111, first accommodating cavity; 112, second accommodating cavity; 113, pole piece accommodating cavity;

[0035] 114, first pole piece accommodating cavity; 115, second pole piece accommodating cavity; 21, first output pole ear;

[0036] 22, first surface; 211, first welding area; 31, second output tab;

[0037] 311, second welding area; 200, soft-pack battery; 210, shell; 220, first ear glue; 230, second ear glue. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0040] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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.

[0043] The battery cell 100, the soft-pack battery 200 and the electrical equipment in the embodiment of the utility model are now described.

[0044] Please refer to Figure 1 and Figure 2 , the left-right direction, the front-back direction, and the up-down direction are perpendicular to each other.

[0045] Please refer to Figure 1 and Figure 3 A battery cell 100 provided in the present application includes a body 10 and at least one first pole ear 40, the first pole ear 40 is connected to the body 10, at least part of the first pole ear 40 is located outside the body 10, a first rigid support member 20 is provided inside the body 10, one side of the first support member 20 extends beyond the body 10 and is connected to a first output pole ear 21, and the first pole ear 40 is electrically connected to the first output pole ear 21.

[0046] Specifically, one side of the first support member 20 in the horizontal direction exceeds the body 10, and the horizontal direction is perpendicular to the up-down direction, wherein the left-right direction and the front-back direction in the present application are all horizontal directions. The first pole lug 40 and the first output pole lug 21 are located on the same side of the body 10 to facilitate the electrical connection between the first pole lug 40 and the first output pole lug 21. The first pole lug 40 may be partially located outside the body 10, or may be completely located outside the body 10, as long as the first pole lug 40 can be electrically connected to the first output pole lug 21, and no limitation is made here.

[0047] Illustratively, in this embodiment, in the left-right direction, the left side of the first support member 20 exceeds the left side of the body 10 , the first output tab 21 is connected to the left side of the first support member 20 , and the first tab 40 is located on the left side of the body 10 .

[0048] By arranging a rigid first support member 20 inside the body 10 of the battery cell 100, the overall strength of the battery cell 100 can be effectively improved, thereby reducing the deformation of the battery cell 100, and further increasing the size of the battery cell 100 to increase the capacity of the single battery. The present battery cell 100 is suitable for a soft-pack battery 200. In the existing soft-pack battery 200, generally, the tab will eventually be welded to a metal sheet, and the metal sheet is exposed in the soft-pack battery 200 for electrical connection to the external structure. In the present battery cell 100, the first tab 40 is electrically connected to the first output tab 21, that is, the first output tab 21 acts as a metal sheet in the prior art, and the left side of the first support member 20 exceeds the left side of the body 10. The first output tab 21 is arranged on the left side of the first support member 20, which can improve the stability of the first output tab 21, thereby improving the packaging effect of the soft-pack battery 200.

[0049] In another embodiment of the present application, the first support member 20 is made of metal. Metal has good thermal conductivity, which is beneficial to improving the heat dissipation performance of the battery cell 100 and can effectively reduce the temperature inside the battery cell 100, thereby improving the safety performance of the battery cell 100.

[0050] Further, the material of the first output pole tab 21 is metal, and a first welding area 211 is provided at one end of the first output pole tab 21 close to the first support member 20, and the first pole tab 40 is welded in the first welding area 211 of the first output pole tab 21. The material of the first output pole tab 21 is the same as that of the first support member 20, and the two are integrally processed and formed, that is, the first output pole tab 21 can be regarded as a part of the first support member 20. Based on this, the first support member 20 can not only be used to support the body 10 of the battery cell 100, but also can be used to be electrically connected to the first pole tab 40. Compared with the existing soft-pack battery 200, the first output pole tab 21 of the present battery cell 100 is equivalent to the metal sheet in the prior art, that is, when the present battery cell 100 is used to manufacture the soft-pack battery 200, no additional metal sheet is needed, which can reduce the use of parts and components, thereby reducing the process steps, reducing the production cost, and helping to improve production efficiency.

[0051] In addition, since the material of the first output pole ear 21 and the material of the first support member 20 are both metal parts, the heat generated by the soft-pack battery using the present battery cell 100 during the charging and discharging process can be transferred to the outside through the first support member 20 and the first output pole ear 21, thereby achieving the purpose of reducing the temperature rise of the soft-pack battery.

[0052] In another embodiment of the present application, please refer to Figure 2The first support member 20 has two first surfaces 22 arranged opposite to each other in the thickness direction, and a first insulating layer is arranged on at least one of the first surfaces 22. Specifically, the thickness direction of the first support member 20 is parallel to the up-down direction, and the upper and lower surfaces of the first support member 20 are the first surfaces 22. Providing the first insulating layer on the first surface 22 can effectively reduce the risk of short circuit of the body 10.

[0053] In some embodiments, the first support member 20 is located at the bottom layer or the top layer of the body 10. In this case, the first surface 22 of the first support member 20 facing the body 10 is provided with a first insulating layer, while the first surface 22 of the first support member 20 facing away from the body 10 is not provided with a first insulating layer. In this way, on the one hand, the thickness of the first support member 20 can be reduced, thereby reducing the thickness of the battery cell 100, which is beneficial to improving the energy density of the battery cell 100. On the other hand, the use of coating slurry can be reduced, which is beneficial to reducing production costs. Of course, in some other embodiments, the first surface 22 of the first support member 20 facing away from the body 10 can also be provided with a first insulating layer, which is not limited here.

[0054] In some embodiments, the first support member 20 is located in the inner layer of the body 10, and the inner layer of the body 10 is the position other than the bottom layer and the top layer of the body 10. At this time, both first surfaces 22 of the first support member 20 are provided with a first insulating layer.

[0055] In another embodiment of the present application, please refer to Figure 1 The battery cell 100 also includes at least one second pole ear 50, which is connected to the body 10, at least part of which is located outside the body 10, the polarity of the second pole ear 50 is opposite to the polarity of the first pole ear 40, the first pole ear 40 is electrically isolated from the second pole ear 50, and a rigid second support member 30 is provided inside the body 10, one side of the second support member 30 exceeds the body 10 and is connected to the second output pole ear 31, and the second pole ear 50 is electrically connected to the second output pole ear 31.

[0056] Specifically, one side of the second support member 30 in the horizontal direction exceeds the body 10, and the second pole tab 50 and the second output pole tab 31 are located on the same side of the body 10 to facilitate the electrical connection between the second pole tab 50 and the second output pole tab 31. The second pole tab 50 may be partially located outside the body 10, or may be completely located outside the body 10, as long as the second pole tab 50 can be electrically connected to the second output pole tab 31, which is not limited here.

[0057] Illustratively, in this embodiment, in the left-right direction, the right side of the second support member 30 exceeds the right side of the body 10 , the second output tab 31 is connected to the right side of the second support member 30 , and the second tab 50 is located on the right side of the body 10 .

[0058] By providing a rigid second support member 30 inside the body 10 of the battery cell 100 , on the one hand, the overall strength of the battery cell 100 is further improved, and on the other hand, the stability of the second output tab 31 can be improved, further improving the packaging effect of the soft-pack battery 200 .

[0059] In another embodiment of the present application, the second support member 30 is made of metal, which is beneficial to improving the heat dissipation performance of the battery cell 100 .

[0060] Further, the material of the second output pole tab 31 is metal, and a second welding area 311 is provided at one end of the second output pole tab 31 close to the second support member 30, and the second pole tab 50 is welded in the second welding area 311 of the second output pole tab 31. The material of the second output pole tab 31 is the same as that of the second support member 30, and the two are integrally processed and formed, that is, the second output pole tab 31 can be regarded as a part of the second support member 30. Based on this, the second support member 30 can not only be used to support the body 10 of the battery cell 100, but also be used to be electrically connected to the second pole tab 50, which can reduce the process steps and is conducive to improving production efficiency.

[0061] Similarly, since the material of the second output pole ear 31 and the material of the second support member 30 are both metal, the heat generated by the soft-pack battery using the present battery cell 100 during the charging and discharging process can be transferred to the outside through the second support member 30 and the second output pole ear 31, further reducing the temperature rise of the soft-pack battery.

[0062] In another embodiment of the present application, please refer to Figure 4 , the first output tab 21 and the second output tab 31 are respectively located on opposite sides of the battery cell 100 in a first direction, and the first direction is perpendicular to the thickness direction of the body 10. Specifically, the thickness direction of the body 10 is parallel to the up-down direction, and the first direction is the aforementioned horizontal direction. In this embodiment, the battery cell 100 has a two-side output tab structure, which can make the temperature distribution on the battery cell 100 more uniform, which is conducive to extending the service life of the battery cell 100.

[0063] In some embodiments, please refer to Figure 5 The first output tab 21 and the second output tab 31 are located on the same side of the battery cell 100 in the first direction. This arrangement facilitates electrical connection between the external structure and the battery cell 100.

[0064] In another embodiment of the present application, please refer to Figure 3The main body 10 includes a first pole piece 12, a diaphragm 11 and a second pole piece 13. The diaphragm 11 is bent in a Z shape to form a first accommodating cavity 111, a second accommodating cavity 112 and a plurality of pole piece accommodating cavities 113. The first support member 20 is accommodated in the first accommodating cavity 111, and the second support member 30 is accommodated in the second accommodating cavity 112. Each pole piece accommodating cavity 113 accommodates the first pole piece 12 or the second pole piece 13, wherein the first pole piece 12 and the second pole piece 13 are arranged alternately at intervals, the first pole piece 12 is provided with a first pole ear 40, and the second pole piece 13 is provided with a second pole ear 50.

[0065] Specifically, the electrode accommodating cavity 113 includes a first electrode accommodating cavity 114 for accommodating the first electrode 12 and a second electrode accommodating cavity 115 for accommodating the second electrode 13. A plurality of first electrode accommodating cavities 114 and second electrode accommodating cavities 115 are provided, and are alternately stacked in the up-down direction. The first accommodating cavity 111 and the second accommodating cavity 112 are located between adjacent first electrode accommodating cavities 114 and second electrode accommodating cavities 115. Each first electrode 12 is provided with a first pole lug 40, and each second electrode 13 is provided with a second pole lug 50.

[0066] In another embodiment of the present application, the first accommodation cavity 111 is located at one third of the total height of the diaphragm 11, and the second accommodation cavity 112 is located at two thirds of the total height of the diaphragm 11, that is, the first support member 20 is located at one third of the total thickness of the body 10 in the thickness direction of the body 10, and the second support member 30 is located at two thirds of the total thickness of the body 10 in the thickness direction of the body 10. Such a configuration effectively improves the reinforcing effect of the first support member 20 and the second support member 30 on the body 10, and further reduces the deformation of the battery cell 100.

[0067] The polarity of the first pole piece 12 and the second pole piece 13 are opposite, and the first pole piece 12 can be a positive pole piece or a negative pole piece, which is not limited here. The polarity of the first pole piece 40 and the first output pole piece 21 is the same as that of the first pole piece 12, and the polarity of the second pole piece 50 and the second output pole piece 31 is the same as that of the second pole piece 13, wherein when the first output pole piece 21 is electrically connected to the positive pole piece, the material of the first output pole piece 21 and the first support member 20 is aluminum, and when the first output pole piece 21 is electrically connected to the negative pole piece, the material of the first output pole piece 21 and the first support member 20 is copper. Similarly, when the second output pole piece 31 is electrically connected to the positive pole piece, the material of the second output pole piece 31 and the second support member 30 is aluminum, and when the second output pole piece 31 is electrically connected to the negative pole piece, the material of the second output pole piece 31 and the second support member 30 is copper.

[0068] In another embodiment of the present application, the first pole piece 12 has a first active material layer, the second pole piece 13 has a second active material layer, and the first support member 20 exceeds the first active material layer or the second active material layer by 0.5 to 5 mm on at least one side in its length direction. Specifically, the first pole piece 12 includes a first current collector and a first active material layer coated on the upper and lower surfaces of the first current collector, and the second pole piece 13 includes a second current collector and a second active material layer coated on the upper and lower surfaces of the second current collector. The length direction of the first support member 20 is parallel to the left and right directions. In this embodiment, the left side of the first support member 20 exceeds the left side of the first active material layer by 0.5 to 5 mm, or exceeds the left side of the second active material layer by 0.5 to 5 mm. The right side of the first support member 20 exceeds the right side of the first active material layer by 0.5 to 5 mm, or exceeds the right side of the second active material layer by 0.5 to 5 mm. In this way, on the one hand, the reinforcing effect of the first support member 20 on the body 10 can be effectively improved, and on the other hand, the first support member 20 can be prevented from being too long, so as to reduce the risk of the diaphragm 11 being broken by the first support member 20, thereby improving the safety performance.

[0069] In another embodiment of the present application, please refer to Figure 1 , at least one side of the first support member 20 in its width direction exceeds the first active material layer or the second active material layer by 0.5 to 5 mm. Specifically, the width direction of the first support member 20 is parallel to the front-to-back direction, and the front side of the first support member 20 exceeds the front side of the first active material layer by 0.5 to 5 mm, or exceeds the front side of the second active material layer by 0.5 to 5 mm. The rear side of the first support member 20 exceeds the rear side of the first active material layer by 0.5 to 5 mm, or exceeds the rear side of the second active material layer by 0.5 to 5 mm. With such an arrangement, on the one hand, the reinforcing effect of the first support member 20 on the main body 10 can be effectively improved, and on the other hand, the first support member 20 can be prevented from being too wide, so as to reduce the risk of the diaphragm 11 being broken by the first support member 20, thereby improving the safety performance.

[0070] Of course, in some other embodiments, only one side of the first support member 20 may extend beyond the first active material layer or the second active material layer.

[0071] Define the plane perpendicular to the up and down direction as a horizontal plane. It can be understood that the projection A of the first active material layer on the horizontal plane can overlap with the projection B of the second active material layer on the horizontal plane, that is, the coating area of ​​the first active material layer is equal to the coating area of ​​the second active material layer. Projection A can also be located in projection B, and projection A can also surround projection B, which is not limited here. In the present application, the first support member 20 is defined with reference to the active material layer with the largest coating area. For example, in some embodiments, projection A is located in projection B, and at least one side of the first support member 20 in its own length direction exceeds the second active material layer by 0.5 to 5 mm, and at least one side of the first support member 20 in its own width direction exceeds the second active material layer by 0.5 to 5 mm. For another example, in some embodiments, projection A surrounds projection B, and at least one side of the first support member 20 in its own length direction exceeds the first active material layer by 0.5 to 5 mm, and at least one side of the first support member 20 in its own width direction exceeds the first active material layer by 0.5 to 5 mm.

[0072] In another embodiment of the present application, the length direction of the second support member 30 is parallel to the left-right direction, and the left side of the second support member 30 exceeds the left side of the first active material layer by 0.5 to 5 mm, or exceeds the left side of the second active material layer by 0.5 to 5 mm. The right side of the second support member 30 exceeds the right side of the first active material layer by 0.5 to 5 mm, or exceeds the right side of the second active material layer by 0.5 to 5 mm.

[0073] In another embodiment of the present application, the width direction of the second support member 30 is parallel to the front-to-back direction, and the front side of the second support member 30 exceeds the front side of the first active material layer by 0.5 to 5 mm, or exceeds the front side of the second active material layer by 0.5 to 5 mm. The rear side of the second support member 30 exceeds the rear side of the first active material layer by 0.5 to 5 mm, or exceeds the rear side of the second active material layer by 0.5 to 5 mm.

[0074] In the present application, similarly, the second support member 30 is defined by taking the active material layer with the largest coating area as a reference, which is the same as the first support member 20 and will not be described again.

[0075] In another embodiment of the present application, the second support member 30 has two second surfaces arranged opposite to each other in the thickness direction, and a second insulating layer is arranged on at least one of the second surfaces. Specifically, the thickness direction of the second support member 30 is parallel to the up-down direction, and the upper and lower surfaces of the second support member 30 are the second surfaces. Providing the second insulating layer on the second surface can effectively reduce the risk of short circuit of the body 10.

[0076] The thickness of the first insulating layer and the thickness of the second insulating layer are both 5-100 μm, for example, 5 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90, 100 μm, etc. Such limitation is to avoid the first insulating layer and the second insulating layer being too thick, resulting in a decrease in the energy density of the battery cell 100.

[0077] The first insulating layer and the second insulating layer both include at least one of an organic insulating layer and an inorganic insulating layer, wherein the material of the organic insulating layer is an organic polymer, such as polyamide, polyterephthalate, polyimide, polyethylene, polypropylene, polystyrene, polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer, polybutylene terephthalate, poly(p-phenylene terephthalamide), polypropylene, polyformaldehyde, epoxy resin, phenolic resin, polytetrafluoroethylene, polyvinylidene fluoride, silicone rubber, polyether nitrile, polyacrylonitrile, styrene-butadiene rubber, polyurethane, polymethyl methacrylate, polyphenylene ether and polycarbonate, and the material of the inorganic insulating layer is an inorganic substance, such as alumina, zirconium oxide, boehmite, silicon carbide and silicon dioxide, etc.

[0078] It is understandable that the first insulating layer and the second insulating layer may be the same or different. The thickness of the first insulating layer and the thickness of the second insulating layer may be the same or different, which is not limited here. In this embodiment, the first insulating layer is the same as the second insulating layer, and the thickness of the first insulating layer is the same as the thickness of the second insulating layer. In this way, the specifications of the first insulating layer and the second insulating layer can be unified, the diversity of manufacturing materials can be reduced, and the process technology can be reduced, thereby improving production efficiency.

[0079] The above is the first battery cell 100 provided by the present application. The present application also provides a second battery cell 100, which includes a body 10 and at least one first pole ear 40, the first pole ear 40 is connected to the body 10, at least part of the first pole ear 40 is located outside the body 10, and a first support member 20 with rigidity is arranged inside the body 10, and the material of the first support member 20 is an insulating material, and the insulating material can be, for example, PU, ​​PA, CFRP, PI, etc. In the battery cell 100, the first support member 20 is not provided with an output pole ear, that is, compared with the prior art, the second battery cell 100 provided by the present application is only provided with the first support member 20 inside the battery cell 100, and the first support member 20 is not electrically connected to the first pole ear 40 and the second pole ear 50. The first support member 20 is directly manufactured by using an insulating material, which can save the process of preparing the insulating layer, and is conducive to reducing production costs and improving production efficiency.

[0080] It is not difficult to understand that in the second battery cell 100 provided in the present application, the diaphragm 11 is bent in a Z shape to form a plurality of accommodating cavities, each of which is provided with a first pole piece 12, a second pole piece 13 and one of the first support members 20, wherein the plurality of first pole pieces 12 and the plurality of second pole pieces 13 are arranged alternately at intervals in the up and down directions.

[0081] In addition, the number of the first support members 20 can be one, two or more. The more the number of the first support members 20 is, the higher the overall strength of the battery cell will be, but the energy density of the battery cell will be affected. Therefore, the number of the first support members 20 should be determined according to actual needs and is not limited here.

[0082] The present application also provides a soft-pack battery 200, which includes a shell 210 and the aforementioned first type of battery cell 100, wherein the battery cell 100 is encapsulated in the shell 210, the first output tab 21 on the battery cell 100 is bonded to the shell 210 through the first tab glue 220, and the second output tab 31 on the battery cell 100 is bonded to the shell 210 through the second tab glue 230. The first output tab 21 and the second output tab 31 both pass through the shell 210 for electrical connection to the external structure.

[0083] The above is the first soft-pack battery 200 provided in the present application. The present application also provides a second soft-pack battery 200 , which includes a shell 210 and the aforementioned second battery cell 100 , wherein the battery cell 100 is encapsulated in the shell 210 .

[0084] Since the soft-pack battery 200 provided in the present application adopts the aforementioned battery cell 100 , the size of the soft-pack battery 200 can be larger, thereby making the capacity of the soft-pack battery 200 larger.

[0085] The present application also provides an electric device, including at least one of the two soft-pack batteries 200 mentioned above, that is, the electric device may use only the first soft-pack battery 200, or only the second soft-pack battery 200, or both soft-pack batteries 200. The electric device may include but is not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecrafts, etc.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell, characterized in that: The invention comprises a body (10) and at least one first pole lug (40), wherein the first pole lug (40) is connected to the body (10), and at least a part of the first pole lug (40) is located outside the body (10); a first rigid support member (20) is arranged inside the body (10), one side of the first support member (20) protrudes from the body (10) and is connected to a first output pole lug (21); the first pole lug (40) is electrically connected to the first output pole lug (21).

2. The battery cell according to claim 1, characterized in that: The first support member (20) is made of metal.

3. The battery cell according to claim 2, characterized in that: The first support member (20) has two first surfaces (22) arranged opposite to each other in the thickness direction thereof, and a first insulating layer is arranged on at least one of the first surfaces (22); And / or, the first output pole lug (21) is made of metal.

4. The battery cell according to any one of claims 1 to 3, characterized in that: The battery cell (100) further comprises at least one second pole lug (50), the second pole lug (50) being connected to the body (10), at least a portion of the second pole lug (50) being located outside the body (10), the polarity of the second pole lug (50) being opposite to the polarity of the first pole lug (40), the first pole lug (40) being electrically isolated from the second pole lug (50), a second rigid support member (30) being disposed inside the body (10), one side of the second support member (30) being protruding from the body (10) and being connected to a second output pole lug (31), the second pole lug (50) being electrically connected to the second output pole lug (31).

5. The battery cell according to claim 4, characterized in that: The first output pole lug (21) and the second output pole lug (31) are respectively located on two opposite sides of the battery cell (100) in a first direction; Alternatively, the first output pole lug (21) and the second output pole lug (31) are located on the same side of the battery cell (100) in the first direction; Wherein, the first direction is perpendicular to the thickness direction of the body (10).

6. The battery cell according to claim 4, characterized in that: The body (10) comprises a first pole piece (12), a diaphragm (11) and a second pole piece (13); the diaphragm (11) is bent in a Z shape to form a first accommodating cavity (111), a second accommodating cavity (112) and a plurality of pole piece accommodating cavities (113); the first support member (20) is accommodated in the first accommodating cavity (111); the second support member (30) is accommodated in the second accommodating cavity (112); each of the pole piece accommodating cavities (113) accommodates the first pole piece (12) or the second pole piece (13); wherein the first pole piece (12) and the second pole piece (13) are arranged alternately at intervals; the first pole piece (12) is provided with the first pole ear (40); and the second pole piece (13) is provided with the second pole ear (50).

7. The battery cell according to claim 6, characterized in that: The first pole piece (12) has a first active material layer, the second pole piece (13) has a second active material layer, and the first support member (20) satisfies at least one of the following: (1) At least one side of the first support member (20) in its length direction exceeds the first active material layer or the second active material layer by 0.5 to 5 mm; (2) At least one side of the first support member (20) in its width direction exceeds the first active material layer or the second active material layer by 0.5 to 5 mm.

8. A battery cell, characterized in that: The invention comprises a body (10) and at least one first pole lug (40), wherein the first pole lug (40) is connected to the body (10), and at least a portion of the first pole lug (40) is located outside the body (10). A first rigid support member (20) is provided inside the body (10), and the first support member (20) is made of insulating material.

9. A soft pack battery, characterized in that: The soft-pack battery (200) comprises a shell (210) and the battery cell (100) according to any one of claims 1 to 7, wherein the battery cell (100) is encapsulated in the shell (210), and the first output tab (21) passes through the shell (210); Alternatively, the soft-pack battery (200) comprises a shell (210) and the battery cell (100) according to claim 8, and the battery cell (100) is encapsulated in the shell (210).

10. An electrical equipment, characterized in that: Includes the soft-pack battery (200) as claimed in claim 9.

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