Battery cell, battery device, electric device, and manufacturing device for battery cell

Abstract

The utility model relates to the technical field of battery production, in particular to a battery monomer, a battery device, electric equipment and a manufacturing device of the battery monomer. The battery monomer comprises an electrode assembly and an insulating part, the electrode assembly comprises a tab part and an adapter, the adapter comprises a tab connecting part and a terminal connecting part which are connected with each other, and the tab part is connected with the tab connecting part; the insulating part covers the upper surface of the tab part along the first direction, an avoiding area is formed at one end, facing the terminal connecting part, of the insulating part, the avoiding area is used for avoiding the terminal connecting part, the avoiding area is of a chamfer structure, and the first direction is the height direction of the battery monomer. According to the battery monomer disclosed by the embodiment of the invention, when the insulating part covers the upper surface of the tab part along the first direction, the insulating part can avoid the tab connecting part as the avoiding area is arranged at one end, facing the tab connecting part, of the insulating part, so that the probability of interference between the insulating part and the tab connecting part is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, and in particular to a battery monomer, a battery device, an electric equipment and a manufacturing device of the battery monomer. BACKGROUND

[0002] This part provides only background information related to the present disclosure, which is not necessarily prior art.

[0003] With the increasing maturity of new energy technology, new energy vehicles and other electric equipment have gradually entered the public eye. The main core technology of new energy vehicles lies in the battery device, and the safety and stability of the battery device directly determine the performance of the whole vehicle.

[0004] The battery device includes a battery monomer, and the battery monomer includes an electrode assembly and an insulating film. The electrode assembly includes a tab portion and a adapter, and the insulating film covers the upper surface of the tab portion, thereby reducing the probability of short circuit of the tab portion.

[0005] In the process of covering the insulating film on the upper surface of the tab portion, the insulating film is prone to interfere with the terminal connecting portion of the adapter. Invention content

[0006] In view of the above problems, the present application provides a battery monomer, a battery device, an electric equipment and a manufacturing device of the battery monomer, which solves the problem that the battery monomer in the prior art is prone to interfere with the terminal connecting portion of the adapter in the process of covering the insulating film on the upper surface of the tab portion.

[0007] A first aspect of an embodiment of the present application provides a battery monomer, which includes:

[0008] An electrode assembly, the electrode assembly including a tab portion and an adapter, the adapter including a tab connecting portion and a terminal connecting portion connected to each other, wherein the tab portion is connected to the tab connecting portion; and

[0009] An insulating member, the insulating member covering the upper surface of the tab portion along a first direction, and an end of the insulating member facing the terminal connecting portion being formed with a avoiding area, the avoiding area being used for avoiding the terminal connecting portion, and the avoiding area being a chamfer structure, wherein the first direction is a height direction of the battery monomer.

[0010] The battery cell of the embodiment of the present application sets the electrode assembly and the insulating piece, wherein the electrode assembly comprises the tab part and the adapter part, the adapter part comprises the tab connecting part, the tab part is connected with the tab connecting part, the insulating piece covers the upper surface of the tab part along the first direction, and the end of the insulating piece facing the tab connecting part is provided with the avoiding area for avoiding the tab connecting part. When the insulating piece covers the upper surface of the tab part along the first direction, the insulating piece can be set away from the tab connecting part due to the avoiding area provided at the end of the insulating piece facing the tab connecting part, thereby reducing the probability of interference between the insulating piece and the tab connecting part.

[0011] In some embodiments of the present application, the chamfer structure comprises an arc-shaped chamfer.

[0012] In some embodiments of the present application, the chamfer structure comprises an arc-shaped chamfer.

[0013] In some embodiments of the present application, the insulating piece is a layered structure.

[0014] In some embodiments of the present application, the insulating piece is a layered structure.

[0015] In some embodiments of the present application, the layered structure comprises the adhesive layer and the release film layer which are arranged in a laminated manner and connected with each other, and the adhesive layer is arranged to face the tab connecting part.

[0016] In some embodiments of the present application, the layered structure comprises the adhesive layer and the release film layer which are arranged in a laminated manner and connected with each other, and the adhesive layer is arranged to face the tab connecting part.

[0017] In some embodiments of the present application, the adhesive layer comprises the glue layer and the substrate layer which are arranged in a laminated manner and connected with each other, and the glue layer is connected with the release film layer.

[0018] In some embodiments of the present application, the adhesive layer comprises the glue layer and the substrate layer which are arranged in a laminated manner and connected with each other, and the glue layer is connected with the release film layer.

[0019] In some embodiments of the present application, the thickness of the glue layer is in the range of 0.02 to 0.1 millimeter, and / or the thickness of the substrate layer is in the range of 0.02 to 0.1 millimeter.

[0020] The embodiments of the present application can set the thickness of the adhesive layer in an appropriate range by setting the thickness of the adhesive layer in the range of 0.02 to 0.1 millimeter, reduce the case that the thickness of the adhesive layer is too large to occupy space and cause material waste, and reduce the case that the thickness of the adhesive layer is too small to have low adhesion. In addition, the embodiments of the present application can set the thickness of the substrate layer in an appropriate range by setting the thickness of the substrate layer in the range of 0.02 to 0.1 millimeter, reduce the case that the thickness of the substrate layer is too large to occupy space and cause material waste, and reduce the probability that the thickness of the substrate layer is too small to cause the strength of the bonding layer to be low.

[0021] In some embodiments of the present application, the thickness of the adhesive layer is in the range of 0.03 to 0.08 millimeter, and / or the thickness of the substrate layer is in the range of 0.03 to 0.08 millimeter.

[0022] The embodiments of the present application can set the thickness of the adhesive layer in an appropriate range by setting the thickness of the adhesive layer in the range of 0.03 to 0.08 millimeter, reduce the case that the thickness of the adhesive layer is too large to occupy space and cause material waste, and reduce the case that the thickness of the adhesive layer is too small to have low adhesion. In addition, the embodiments of the present application can set the thickness of the substrate layer in an appropriate range by setting the thickness of the substrate layer in the range of 0.03 to 0.08 millimeter, reduce the case that the thickness of the substrate layer is too large to occupy space and cause material waste, and reduce the probability that the thickness of the substrate layer is too small to cause the strength of the bonding layer to be low. The second aspect of the embodiments of the present application proposes a battery device, the battery device comprising:

[0023] the battery cell mentioned in the above embodiments; and

[0024] a box, the battery cell being arranged in the box.

[0025] The third aspect of the embodiments of the present application proposes an electrical equipment, the electrical equipment comprising the battery device mentioned in the above embodiments, the battery device being used to supply power for the electrical equipment.

[0026] The fourth aspect of the embodiments of the present application proposes a manufacturing device, the manufacturing device being used to prepare the battery cell mentioned in the above embodiments.

[0027] In some embodiments of the present application, the manufacturing device comprises:

[0028] the adsorption structure comprising:

[0029] the first glue cylinder, the first glue cylinder being provided with an insulation piece, the insulation piece comprising a release film layer and a bonding layer arranged in a laminated manner;

[0030] the second glue cylinder, the second glue cylinder being used to wind the release film layer of the insulation piece;

[0031] The tensioning roller is arranged between the first rubber cylinder and the second rubber cylinder, and is used for tensioning the insulating member;

[0032] The support member is arranged between the first rubber cylinder and the second rubber cylinder, and is used for supporting the insulating member located between the first rubber cylinder and the second rubber cylinder;

[0033] The suction accessory is arranged on the opposite sides of the insulating member with the support member, and is used for suctioning the adhesive layer of the insulating member.

[0034] The embodiment of the present application sets the suction structure, wherein the suction structure comprises a first rubber cylinder, a second rubber cylinder, a tensioning roller, a support member and a suction accessory, the first rubber cylinder is provided with an insulating member, the insulating member comprises a release film layer and an adhesive layer arranged in a laminated manner, the second rubber cylinder is used for winding the release film layer of the insulating member, the tensioning roller is arranged between the first rubber cylinder and the second rubber cylinder, and is used for tensioning the insulating member, the support member is arranged between the first rubber cylinder and the second rubber cylinder, and is used for supporting the insulating member located between the first rubber cylinder and the second rubber cylinder, and the suction accessory is arranged on the opposite sides of the insulating member with the support member, and is used for suctioning the adhesive layer of the insulating member, so that the adhesive layer of the insulating member is suctioned by the suction accessory, the remaining release film layer is wound by the second rubber cylinder, and recycling is realized.

[0035] In some embodiments of the present application, the support member comprises a plastic member.

[0036] The embodiment of the present application comprises the plastic member in the support member, so that the support of the insulating member can be realized, and the cost of the support member can be reduced.

[0037] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0038] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become apparent to those of ordinary skill in the art. The drawings are for the purpose of illustrating the preferred embodiments only and are not to be considered as limiting of the present application. Moreover, the same reference numerals are used throughout the various drawings to designate the same parts. In the drawings:

[0039] Figure 1 The structural schematic diagram of the power utilization equipment provided for some embodiments of the present application is shown;

[0040] Figure 2 The structural schematic diagram of the battery device provided for some embodiments of the present application is shown;

[0041] Figure 3A schematic diagram of a decomposition structure of a battery cell (insulation member not shown) according to some embodiments of the present application;

[0042] Figure 4 A schematic diagram of a structure in which an insulation member covers the upper surface of the tab portion in the first direction according to some embodiments of the present application;

[0043] Figure 5 A schematic diagram of a cross-sectional structure of an insulation member according to some embodiments of the present application; Figure 4

[0044] Figure 6 A schematic diagram of a structure of a suction structure of a manufacturing device according to some embodiments of the present application;

[0045] Figure 7 A schematic diagram of a structure of a suction member of a suction structure according to some embodiments of the present application.

[0046] Reference signs are as follows:

[0047] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0048] 10, battery cell; 11, electrode assembly; 111, main body portion; 112, tab portion; 1121, welding mark; 12, adapter; 121, tab connecting portion; 122, terminal connecting portion; 13, top cover; 131, electrode terminal; 14, case; 15, insulation film; 16, insulation member; 161, avoidance area; 162, adhesive layer; 1621, adhesive layer; 1622, base material layer; 163, release film layer;

[0049] 20, box; 21, first box; 22, second box; 23, accommodation space;

[0050] 400, manufacturing device;

[0051] 401, suction structure; 4011, first adhesive cylinder; 4012, second adhesive cylinder; 4013, tension roller; 4014, support member; 4015, suction member;

[0052] Z-Z, height direction of battery cell;

[0053] X-X, length direction of battery cell;

[0054] Y-Y, width direction of battery cell:

[0055] R, radius of avoidance area;

[0056] T1, thickness of adhesive layer;

[0057] T2, thickness of base material layer. DETAILED DESCRIPTION​

[0058] The embodiments of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot be used to limit the protection scope of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "comprises" and "including" as used herein are synonymous with and meant to have the same meaning as the term "including"; the term "coupled" as used herein means the joining of two members together with one or more intervening members.

[0060] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0061] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0063] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", and "fixing" and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the market demand is also increasing.

[0067] The battery device related to the embodiments of the present application can be but not limited to used in electric equipment such as vehicles, ships or aircraft. The battery device can be used to form the electric equipment with the battery monomer, battery device and the like related to the present application.

[0068] The electric equipment using the battery device as power supply in the embodiments of the present application can be but not limited to mobile phones, tablets, notebook computers, electric toys, electric tools, electric cars, electric vehicles, ships, spacecraft and the like. Among them, the electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles and spacecraft, and the like.

[0069] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the above described battery device and electric equipment, but also can be applied to all batteries including the box body and electric equipment using the battery.

[0070] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0071] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0072] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into a separate module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0073] In some embodiments, the battery apparatus can be a battery pack including a case and one or more battery cell assemblies housed in the case.

[0074] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the case by fixing the battery module in the case.

[0075] As an example, the battery cell assembly can also be housed in the case by directly fixing a plurality of battery cells in the case.

[0076] As an example, the case can include a first case and a second case. The first case and the second case are coupled so that an enclosed space is formed inside the case to accommodate the battery cell assembly. Here, the enclosed means covered or closed, which can be sealed or unsealed. The first case can be a top cover or a bottom plate.

[0077] As an example, the case can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that an enclosed space is formed inside the case to accommodate the battery cell assembly.

[0078] In some embodiments, the case can be a part of a chassis structure of a vehicle. For example, a part of the case can be at least a part of a floor of the vehicle, or a part of the case can be at least a part of a cross beam and a longitudinal beam of the vehicle.

[0079] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the positive electrode active material layer protrudes from the current collector with the positive electrode active material layer, and the current collector without the positive electrode active material layer is stacked as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the negative electrode active material layer protrudes from the current collector with the negative electrode active material layer, and the current collector without the negative electrode active material layer is stacked as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure, and the embodiments of the present application are not limited thereto.

[0080] The technical solutions described in the embodiments of the present application are suitable for various electric devices using battery cells, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0081] The battery device includes a battery cell, and the battery cell includes an electrode assembly and an insulating film. The electrode assembly includes a tab portion and a transition piece, and the insulating film covers the upper surface of the tab portion to reduce the probability of short circuit of the tab portion.

[0082] In the process of covering the insulating film on the upper surface of the tab portion, the insulating film is easily interfered with the terminal connecting portion of the transition piece.

[0083] In order to solve this problem, the embodiments of the present application provide a battery cell, which includes an electrode assembly and an insulating piece. The electrode assembly includes a tab portion and a transition piece, and the transition piece includes a tab connecting portion. The tab portion is connected with the tab connecting portion. The insulating piece covers the upper surface of the tab portion along the height direction of the battery cell, and one end of the insulating piece facing the terminal connecting portion is formed with a avoiding area for avoiding the terminal connecting portion. Therefore, the insulating piece can be arranged away from the tab connecting portion, and the probability of interference between the insulating piece and the tab connecting portion is reduced.

[0084] The battery cell in the embodiments of the present application can be used in electric equipment such as a vehicle, or can be installed in electric equipment that needs to be installed with a battery cell in advance.

[0085] The structure in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0086] In combination Figure 1 As shown in the figure, the vehicle 1000 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or an extended range car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0087] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0088] As Figure 2 As shown in the figure, the embodiments of the present application also provide a battery device 100, which includes a battery box 20 and a battery cell 10, and the battery box 20 is internally provided with a containing space 23, and the battery cell 10 is installed in the containing space 23.

[0089] In some embodiments, as Figure 2 As shown in the figure, the battery box 20 can include a first box 21 and a second box 22, and the first box 21 and the second box 22 are overlapped with each other, and the first box 21 and the second box 22 together define a containing space 23 for containing the battery cell 10. Among them, the first box 21 and the second box 22 can both be a hollow structure with one end open, and the second box 22 is overlapped with the open side of the first box 21 to make the first box 21 and the second box 22 together define the containing space; or the second box 22 can be a plate structure, and the first box 21 can be a hollow structure with one side open, and the open side of the second box 22 is overlapped with the open side of the first box 21. Of course, the battery box 20 formed by the first box 21 and the second box 22 can be in various shapes, such as a cylinder or a cuboid, etc.

[0090] The battery cell 10 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 10 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0091] As Figure 3As shown, the embodiments of the present application also propose a battery cell 10, the battery cell 10 comprising an electrode assembly 11 and an insulation member 16, the electrode assembly 11 comprising a tab portion 112 and an adapter 12, the adapter 12 comprising a tab connecting portion 121 and a terminal connecting portion 122 connected to each other, wherein the tab portion 112 is connected to the tab connecting portion 121; the insulation member 16 covers an upper surface of the tab portion 112 along a first direction, and an end of the insulation member 16 facing the terminal connecting portion 122 is formed with a relief area 161 for avoiding the terminal connecting portion 122, wherein the first direction is a height direction of the battery cell 10, that is, a Z-Z direction in the figure, and an X-X direction is a length direction of the battery cell 10, and a Y-Y direction is a width direction of the battery cell 10. Figure 3

[0092] It can be understood that the battery cell 10 further comprises a shell 14, an insulation film 15 and a top cover 13, wherein the electrode assembly 11 is located in a space enclosed by the top cover 13 and the shell 14, the insulation film 15 covers an outer surface of the shell 14, and the electrode terminal 131 is mounted on the top cover 13.

[0093] The electrode assembly 11 is a component in which an electrochemical reaction occurs in the battery cell 10. One or more electrode assemblies 11 can be contained in the shell 14. The electrode assembly 11 comprises a main body portion 111 and a tab portion 112 protruding from the main body portion 111. The main body portion 111 comprises a first electrode sheet, a second electrode sheet and a separator, the first electrode sheet and the second electrode sheet having opposite polarities, and the separator is used to insulate and separate the first electrode sheet and the second electrode sheet. The first electrode sheet, the second electrode sheet and the separator can be wound or stacked. The first electrode sheet comprises a first coated area coated with a first active material layer, and the second electrode sheet comprises a second coated area coated with a second active material layer. The tab portion 112 can be a positive electrode tab or a negative electrode tab, wherein the positive electrode tab and the negative electrode tab can be located at one end of the main body portion 111 or at two ends of the main body portion 111 respectively. In the charging and discharging process of the battery cell 10, the first active material and the second active material react with the electrolyte, and the tab portion 112 is connected to the electrode terminal 131 to form a current loop.

[0094] In addition, the adapter 12 herein can be in the shape of a sheet, a strip or a block, or other shapes, as long as it can achieve the electrical connection between the tab portion 112 and the electrode terminal 131. The insulation member 16 herein can be in the form of a film, which has an insulating function and can be a blue film or other colored insulation structure.

[0095] As shown in the figure, the adapter 12 is connected to the tab portion 112 and the terminal connecting portion 122, and the terminal connecting portion 122 is connected to the electrode terminal 131. Figure 4 ​As shown, generally, the insulation piece 16 is a rectangular structure, thus, after the insulation piece 16 covers the upper surface of the tab portion 112 along the first direction, the insulation piece 16 is likely to interfere with the terminal connecting portion 122, affecting the normal progress of the next process. In the embodiment of the present application, by forming the avoidance area 161 at one end of the insulation piece 16 facing the terminal connecting portion 122, the avoidance area 161 is used to avoid the terminal connecting portion 122, thus, the case of interference between the insulation piece 16 and the terminal connecting portion 122 can be reduced.

[0096] The battery monomer 10 of the embodiment of the present application is provided with the electrode assembly 11 and the insulation piece 16, wherein the electrode assembly 11 includes the tab portion 112 and the adapter 12, the adapter 12 includes the tab connecting portion 121, the tab portion 112 is connected with the tab connecting portion 121, the insulation piece 16 covers the upper surface of the tab portion 112 along the first direction, and one end of the insulation piece 16 facing the tab connecting portion 121 is provided with the avoidance area 161, the avoidance area 161 is used to avoid the tab connecting portion 121, thus, when the insulation piece 16 covers the upper surface of the tab portion 112 along the first direction, since one end of the insulation piece 16 facing the tab connecting portion 121 is provided with the avoidance area 161, the insulation piece 16 can be arranged to avoid the tab connecting portion 121, and the probability of interference between the insulation piece 16 and the tab connecting portion 121 can be reduced.

[0097] Optionally, the insulation piece 16 is a rectangular structure, as shown in Figure 4 As shown, the avoidance area 161 is arranged at at least one end corner of the rectangular structure facing the tab connecting portion 121.

[0098] It should be noted that the avoidance area 161 is arranged at at least one end corner of the rectangular structure along the Y-Y direction facing the tab connecting portion 121, in Figure 4 the avoidance area 161 is arranged at both end corners of the rectangular structure along the Y-Y direction facing the tab connecting portion 121, alternatively, the avoidance area 161 can also be arranged at one end corner of the rectangular structure along the Y-Y direction facing the tab connecting portion 121, and the avoidance area 161 is closer to the terminal connecting portion 122 than the other end corner, thus, the avoidance area 161 can avoid the terminal connecting portion 122, and the probability of interference between the insulation piece 16 and the terminal connecting portion 122 can be reduced, and the qualified rate of the battery monomer 10 can be improved.

[0099] Specifically, when only one avoidance area 161 is arranged on the insulation piece 16, the avoidance area 161 is arranged closer to the terminal connecting portion 122, thus, the avoidance area 161 can avoid the terminal connecting portion 122, and the probability of interference between the insulation piece 16 and the terminal connecting portion 122 can be reduced.

[0100] The embodiments of the present application can make the insulation piece 16 cover the tab portion 112, reduce the probability of short circuit of the tab portion 112, and make the insulation piece 16 avoid the terminal connecting portion 122, and reduce the probability of interference between the insulation piece 16 and the tab connecting portion 121 by setting the insulation piece 16 as a rectangular structure, and setting the avoidance area 161 at at least one end corner of the rectangular structure facing the tab connecting portion 121.

[0101] Optionally, as shown in Figure 4 , the avoidance area 161 is arranged at both end corners of the rectangular structure facing the tab connecting portion 121.

[0102] In Figure 4 , the number of the insulation pieces 16 is two, each insulation piece 16 covers one tab portion 112, and the avoidance area 161 is formed at both end corners of the rectangular structure facing the tab connecting portion 121, so that the insulation piece 16 can be formed as an axial symmetric structure, and the insulation piece 16 is conveniently covered on the tab portion 112.

[0103] The embodiments of the present application can make the rectangular structure avoid the terminal connecting portion 122 at the positions of both end corners of the rectangular structure facing the tab connecting portion 121, so that the rectangular structure can reduce the probability of interference with the terminal connecting portion 122 by setting the avoidance area 161 at both end corners of the rectangular structure facing the tab connecting portion 121.

[0104] It should be noted that the shape of the avoidance area 161 can be determined according to the shape of the tab portion 112, so that the insulation piece 16 can realize overall coverage of the upper surface of the tab portion 112, and the shape of the avoidance area 161 can be an arc-shaped notch structure, a triangular notch structure, or a rectangular notch structure, etc.

[0105] Optionally, as shown in Figure 4 , the avoidance area 161 is a chamfer structure.

[0106] The chamfer structure here can be a rounded chamfer structure or a straight chamfer structure, which can be determined according to the shape of the tab portion 112. In Figure 4 , the position of the end corner of the tab portion 112 is an arc-shaped structure, therefore, the avoidance area 161 of the insulation piece 16 is also set as an arc-shaped notch structure, and the edge of the insulation piece 16 can realize coverage of the edge of the tab portion 112, and reduce the probability of partial leakage of the tab portion 112.

[0107] The embodiments of the present application can facilitate the formation of the avoidance area 161 on the insulation piece 16 by setting the avoidance area 161 as a chamfer structure.

[0108] Optionally, as shown in Figure 5 , the chamfer structure includes an arc-shaped chamfer.

[0109] wherein the radius of the arc-shaped chamfer is represented by R, and the size of R can be determined according to the radius of the end angle of the tab portion 112, that is, R can be equal to the radius of the end angle of the tab portion 112, or can be smaller than the radius of the end angle of the tab portion 112, so that the insulating piece 16 can achieve full coverage of the upper surface of the tab portion 112. For example, the radius of R can be 8 mm or 10 mm, and the value of R can be determined according to the radius of the end angle of the tab portion 112.

[0110] The embodiments of the present application can make the end of the insulating piece 16 facing the terminal connecting portion 122 form a smooth structure by including the arc-shaped chamfer, facilitate the covering of the insulating piece 16 on the upper surface of the tab portion 112 in the first direction, and reduce the probability of wrinkles of the insulating piece 16.

[0111] It should be noted that when the insulating piece 16 adopts a rectangular structure, wrinkles are prone to occur at the end angle position of the rectangular structure. Here, the relief area 161 is formed at the end angle position of the insulating piece 16, which can reduce the probability of wrinkles of the insulating piece 16 when covering the upper surface of the tab portion 112.

[0112] Optionally, as shown in Figure 5 the insulating piece 16 is a layered structure.

[0113] Specifically, the insulating piece 16 can be formed in a structure of at least two layers, and can adopt a double-layer structure or a three-layer structure as needed.

[0114] The embodiments of the present application can facilitate the separation of different parts of the insulating piece 16 by setting the insulating piece 16 as a layered structure, and facilitate the covering of part of the structure of the insulating piece 16 on the tab portion 112.

[0115] Optionally, as shown in Figure 5 the layered structure includes an adhesive layer 162 and a release film layer 163 arranged in a laminated manner and connected to each other, wherein the adhesive layer 162 is arranged to face the tab connecting portion 121.

[0116] During the use of the insulating piece 16, the release film layer 163 can be used to protect the adhesive layer 162, and facilitate the bonding of the adhesive layer 162 and the tab connecting portion 121.

[0117] The embodiments of the present application can facilitate the separation of the adhesive layer 162 and the release film layer 163 from each other and the bonding of the adhesive layer 162 on the upper surface of the tab portion 112 by including the adhesive layer 162 and the release film layer 163 arranged in a laminated manner and connected to each other in the layered structure, and the adhesive layer 162 is arranged to face the tab connecting portion 121.

[0118] In some embodiments of the present application, the adhesive layer 162 comprises a glue layer 1621 and a substrate layer 1622 arranged in a stacked manner and connected to each other, wherein the glue layer 1621 is connected to the release film layer 163.

[0119] When the insulating piece 16 is used, the release film layer 163 is separated from the adhesive layer 162, wherein after the glue layer 1621 is separated from the release film layer 163, the glue layer 1621 is arranged to face the tab portion 112, and when the insulating piece 16 is bonded to the upper surface of the tab portion 112, the glue layer 1621 is in contact with the upper surface of the tab portion 112, so that the adhesive layer 162 can be bonded to the upper surface of the tab portion 112.

[0120] The embodiments of the present application can increase the overall strength of the adhesive layer 162 through the substrate layer 1622 and realize the connection between the adhesive layer 162 and the tab portion 112 through the glue layer 1621 by arranging the adhesive layer 162 to comprise a glue layer 1621 and a substrate layer 1622 arranged in a stacked manner and connected to each other, wherein the glue layer 1621 is connected to the release film layer 163.

[0121] Optionally, as shown in Figure 5 The thickness of the glue layer 1621 is represented by T1, and T1 is in the range of 0.02 to 0.1 millimeter, such as 0.02 millimeter, 0.04 millimeter, 0.06 millimeter, 0.08 millimeter, or 0.1 millimeter, etc. The thickness of the substrate layer 1622 is represented by T2, and T2 is in the range of 0.02 to 0.1 millimeter, such as 0.02 millimeter, 0.04 millimeter, 0.06 millimeter, 0.08 millimeter, or 0.1 millimeter, etc.

[0122] The thickness T1 of the glue layer 1621 and the thickness T2 of the substrate layer 1622 can be the same or different. Considering that the release film layer 163 only plays a protective role for the glue layer 1621, the thickness of the release film layer 163 is not limited here, and a conventional thickness of the release film layer 163 can be adopted.

[0123] The embodiments of the present application can set the thickness of the glue layer 1621 in a suitable range by arranging the thickness of the glue layer 1621 in the range of 0.02 to 0.1 millimeter, thereby reducing the case that the thickness of the glue layer 1621 is too large to occupy space and cause material waste, and reducing the problem that the thickness of the glue layer 1621 is too small and the adhesion is low. In addition, the embodiments of the present application can set the thickness of the substrate layer 1622 in a suitable range by arranging the thickness of the substrate layer 1622 in the range of 0.02 to 0.1 millimeter, thereby reducing the case that the thickness of the substrate layer 1622 is too large to occupy space and cause material waste, and reducing the probability that the thickness of the substrate layer 1622 is too small to cause the strength of the adhesive layer 162 to be too low.

[0124] Optionally, as shown inFigure 6 As shown, the thickness T1 of the adhesive layer 1621 is in the range of 0.03 to 0.08 millimeter, such as 0.03 millimeter, 0.03 millimeter, 0.07 millimeter or 0.08 millimeter, etc. The thickness T2 of the substrate layer 1622 is in the range of 0.03 to 0.08 millimeter, such as 0.03 millimeter, 0.03 millimeter, 0.07 millimeter or 0.08 millimeter, etc.

[0125] The embodiments of the present application can set the thickness of the adhesive layer 1621 in the appropriate range by setting the thickness of the adhesive layer 1621 in the range of 0.03 to 0.08 millimeter, thereby reducing the case that the thickness of the adhesive layer 1621 is too large to occupy space and cause material waste, and reducing the case that the thickness of the adhesive layer 1621 is too small to have low adhesion. In addition, the embodiments of the present application can set the thickness of the substrate layer 1622 in the appropriate range by setting the thickness of the substrate layer 1622 in the range of 0.03 to 0.08 millimeter, thereby reducing the case that the thickness of the substrate layer 1622 is too large to occupy space and cause material waste, and reducing the case that the thickness of the substrate layer 1622 is too small to cause the strength of the adhesive layer 162 to be too low.

[0126] Optionally, the release film layer 163 here can be made of plastic, such as PET, PE or PP plastic, etc. Alternatively, the release film layer 163 here can also be made of kraft paper or electrostatic paper, etc., and the color can be transparent and different from the color of the adhesive layer 162. For example, when the color of the adhesive layer 162 is blue, the release film layer 163 can be made of other colors, which facilitates the observation of the separation process of the release film layer 163 and the adhesive layer 162.

[0127] As shown in Figure 7 and Figure 6 The embodiments of the present application also propose a manufacturing device 400 for preparing the battery cell 10 mentioned in the above embodiments.

[0128] The manufacturing device 400 is mainly used to realize the adhesion of the insulating piece 16 to the upper surface of the tab portion 112, and the specific structure of the manufacturing device 400 will be described in detail below.

[0129] Optionally, the manufacturing device 400 comprises an adsorption structure 401, the adsorption structure 401 comprising a first glue cylinder 4011, a second glue cylinder 4012, a tension roller 4013, a support 4014 and an adsorption accessory 4015, the first glue cylinder 4011 being provided with the insulating piece 16, the insulating piece 16 comprising a release film layer 163 and an adhesive layer 162 arranged in a laminated manner; the second glue cylinder 4012 being used for winding the release film layer 163 of the insulating piece 16; the tension roller 4013 being arranged between the first glue cylinder 4011 and the second glue cylinder 4012 and being used for tensioning the insulating piece 16; the support 4014 being arranged between the first glue cylinder 4011 and the second glue cylinder 4012 and being used for supporting the insulating piece 16 located between the first glue cylinder 4011 and the second glue cylinder 4012; the adsorption accessory 4015 being arranged on opposite sides of the support 4014 and being used for adsorbing the adhesive layer 162 of the insulating piece 16.

[0130] Specifically, the support 4014 is located below the insulating piece 16, and the adsorption accessory 4015 is located above the insulating piece 16, so that when the adhesive layer 162 of the insulating piece 16 passes through the adsorption accessory 4015, the adhesive layer 162 can be adsorbed by the adsorption accessory 4015 and transferred to the upper surface of the tab portion 112, thereby achieving coverage of the upper surface of the tab portion 112.

[0131] In addition, the number of the tension rollers 4013 can be one, two or more, and the tension rollers 4013 can be arranged on the upstream side and the downstream side of the support 4014. ​ In the embodiment, the number of the tension rollers 4013 is two, and the two tension rollers 4013 are arranged on the upstream side and the downstream side of the support 4014, respectively, so as to achieve tensioning of the insulating piece 16.

[0132] The embodiment of the present application provides the adsorption structure 401, wherein the adsorption structure 401 comprises the first glue cylinder 4011, the second glue cylinder 4012, the tension roller 4013, the support 4014 and the adsorption accessory 4015, the first glue cylinder 4011 being provided with the insulating piece 16, the insulating piece 16 comprising the release film layer 163 and the adhesive layer 162 arranged in a laminated manner; the second glue cylinder 4012 being used for winding the release film layer 163 of the insulating piece 16; the tension roller 4013 being arranged between the first glue cylinder 4011 and the second glue cylinder 4012 and being used for tensioning the insulating piece 16; the support 4014 being arranged between the first glue cylinder 4011 and the second glue cylinder 4012 and being used for supporting the insulating piece 16 located between the first glue cylinder 4011 and the second glue cylinder 4012; the adsorption accessory 4015 being arranged on opposite sides of the support 4014 and being used for adsorbing the adhesive layer 162 of the insulating piece 16, so that the adhesive layer 162 of the insulating piece 16 can be adsorbed by the adsorption accessory 4015, and the remaining release film layer 163 can be wound by the second glue cylinder 4012, thereby achieving recycling.

[0133] In some embodiments of the present application, the support 4014 comprises a plastic piece.

[0134] Generally, the insulation piece 16 is not provided with the release film layer 163, and therefore, when the insulation piece 16 is supported, the support piece 4014 is generally made of ceramic material to facilitate the separation between the insulation piece 16 and the support piece 4014. In the present application, since the insulation piece 16 is provided with the release film layer 163, the support piece 4014 can be made of plastic, thereby reducing the cost of the support piece 4014.

[0135] The embodiment of the present application can support the insulation piece 16 by including the plastic support piece 4014, and can reduce the cost of the support piece 4014.

[0136] The use process of the manufacturing device 400 will be described in detail below.

[0137] The insulation piece 16 can form a running structure between the first rubber tube 4011 and the second rubber tube 4012, and when the adhesive layer of the insulation piece 16 passes below the suction member 4015, the adhesive layer can be adsorbed by the suction member 4015, the suction member 4015 is transferred to the upper side of the electrode assembly 11 by the mechanical claw, and then the adhesive layer is bonded to the upper surface of the tab portion 112, and the remaining release film layer 163 is wound by the second rubber tube 4012 to realize recycling.

[0138] It should be noted that the adhesive layer can be cut into multiple parts, or the adhesive layer can be cut and protected by the release film layer 163, and when the suction member 4015 is adsorbed, only one adhesive layer can be adsorbed, and then the adhesive layer is attached to the tab portion 112 of one electrode assembly 11.

[0139] Considering that multiple tab portions 112 are arranged on each electrode assembly 11, one adhesive layer can be bonded on each tab portion 112.

[0140] It should be noted that the tab portion 112 and the tab connecting portion 121 can be connected by welding or clamping. When the tab portion 112 and the tab connecting portion 121 are connected by welding, part of the upper surface of the tab portion 112 generally forms a welding mark 1121, and the insulation piece 16 also covers the upper surface of the welding mark 1121.

[0141] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described.

[0142] The first aspect of the embodiments of the present application provides a battery cell 10, the battery cell 10 comprising an electrode assembly 11 and an insulation piece 16, the electrode assembly 11 comprising a tab portion 112 and a transition piece 12, the transition piece 12 comprising a tab connecting portion 121, wherein the tab portion 112 is connected with the tab connecting portion 121; the insulation piece 16 covers an upper surface of the tab portion 112 along a first direction, and an end of the insulation piece 16 facing the terminal connecting portion 122 is formed with a relief area 161 for avoiding the terminal connecting portion 122, wherein the first direction is a height direction of the battery cell 10. Further, the relief area 161 is a chamfer structure. Further, the chamfer structure comprises an arc chamfer. Further, the insulation piece 16 is a layered structure. Further, the layered structure comprises an adhesive layer and a release film layer 163 arranged in a stacked manner and connected with each other, wherein the adhesive layer is arranged to face the tab connecting portion 121. Further, the adhesive layer comprises a glue layer 1621 and a substrate layer 1622 arranged in a stacked manner and connected with each other, wherein the glue layer 1621 is connected with the release film layer 163. Further, the thickness of the glue layer 1621 is in a range of 0.02 to 0.1 millimeter, and / or the thickness of the substrate layer 1622 is in a range of 0.02 to 0.1 millimeter. Further, the thickness of the glue layer 1621 is in a range of 0.03 to 0.08 millimeter, and / or the thickness of the substrate layer 1622 is in a range of 0.03 to 0.08 millimeter.

[0143] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions easily conceived by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery cell, characterized by, The battery device comprises: an electrode assembly comprising a tab portion and an adapter, the adapter comprising a tab connecting portion and a terminal connecting portion connected to each other, wherein the tab portion is connected to the tab connecting portion; and an insulating member covering an upper surface of the tab portion in a first direction, wherein an end of the insulating member facing the terminal connecting portion is formed with a relief area for avoiding the terminal connecting portion, and the relief area is a chamfer structure, wherein the first direction is a height direction of the battery monomer.

2. The battery cell of claim 1, wherein, The chamfer structure comprises an arc chamfer.

3. The battery cell according to claim 1 or 2, wherein The insulating member is a layered structure.

4. The battery cell of claim 3, wherein, The layered structure comprises an adhesive layer and a release film layer arranged in a stacked manner and connected to each other, wherein the adhesive layer is arranged to face the tab connecting portion.

5. The battery cell of claim 4, wherein the cathode comprises a lithium metal oxide. The adhesive layer comprises a glue layer and a substrate layer arranged in a stacked manner and connected to each other, wherein the glue layer is connected to the release film layer.

6. The battery cell of claim 5, wherein, The thickness of the glue layer is in a range of 0.02 to 0.1 millimeter, and / or the thickness of the substrate layer is in a range of 0.02 to 0.1 millimeter.

7. The battery cell of claim 5, wherein the cathode comprises a lithium metal oxide. The thickness of the glue layer is in a range of 0.03 to 0.08 millimeter, and / or the thickness of the substrate layer is in a range of 0.03 to 0.08 millimeter.

8. A battery device characterized by comprising: The battery device comprises: the battery monomer according to any one of claims 1 to 7; and a box body, wherein the battery monomer is arranged in the box body.

9. An electric device, characterized by The battery device according to claim 8 is used to supply power to the power consumption equipment.

10. A manufacturing apparatus of a battery cell, characterized by, The manufacturing device is used to prepare the battery monomer according to any one of claims 1 to 7.

11. The battery cell manufacturing apparatus according to claim 10, wherein The manufacturing device comprises: a suction structure comprising: a first glue cylinder, wherein the insulating member is arranged on the first glue cylinder, and the insulating member comprises a release film layer and an adhesive layer arranged in a stacked manner; a second glue cylinder, wherein the second glue cylinder is used to wind the release film layer of the insulating member; a tensioning roller, wherein the tensioning roller is arranged between the first glue cylinder and the second glue cylinder, and is used to tension the insulating member; a support, wherein the support is arranged between the first glue cylinder and the second glue cylinder, and is used to support the insulating member between the first glue cylinder and the second glue cylinder; a suction member, wherein the suction member and the support are respectively arranged on opposite sides of the insulating member, and are used to suck the adhesive layer of the insulating member.

12. The battery cell manufacturing apparatus according to claim 11, wherein The support comprises a plastic member.

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