Support devices, welding equipment, battery cells, battery devices and power devices

Abstract

The embodiments of the present application provide a support device, welding equipment, battery cells, battery devices and electrical devices. The support device is used in the welding process of the adapter and the electrode assembly. At least one electrode assembly forms an electrode unit. The electrode unit includes a main body, multiple first pole ears and multiple second pole ears. The first pole ears and the second pole ears are arranged on the same side of the main body and have opposite polarities. The thickness of the first pole ear is less than that of the second pole ear. The support device includes a support member, a fixture assembly and a padding assembly. The support member is used to support and limit the main body. The fixture assembly includes a first fixture and a second fixture. The padding assembly includes at least one first padding member and at least one second padding member. At least one first padding member is arranged above or below the support member, and at least one second padding member is arranged below the first fixture. The present application can improve the quality of the electrode assembly.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more particularly, to a supporting device, welding equipment, a battery cell, a battery device, and an electrical device. Background Art

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc.

[0003] In the development of battery technology, how to improve the quality of electrode components is a research direction in battery technology. Summary of the Invention

[0004] The present application provides a supporting device, welding equipment, a battery cell, a battery device and an electrical device, which can improve the quality of an electrode assembly.

[0005] An embodiment of the present application provides a support device for use in a welding process of an adapter and an electrode assembly, wherein at least one electrode assembly forms an electrode unit, the electrode unit comprising a main body, a plurality of first pole tabs, and a plurality of second pole tabs, the first pole tabs and the second pole tabs being arranged on the same side of the main body and having opposite polarities, the thickness of the first pole tab being less than the thickness of the second pole tab, and the support device comprising a support member, a jig assembly, and a spacer assembly. The support member is used to support and limit the main body. The jig assembly comprises a first jig and a second jig, the first jig being used to support and limit the adapter welded to the first pole tab, and the second jig being used to support and limit the adapter welded to the second pole tab. The spacer assembly comprises at least one first spacer and at least one second spacer, the at least one first spacer being arranged above or below the support member and used to spacer the main body, and the at least one second spacer being arranged below the first jig and used to spacer the first jig.

[0006] In the above technical solution, the support device of this embodiment is provided by providing a first spacer on the support member and a second spacer on the first jig. After the support member raises the electrode assembly, the second jig is not raised. Therefore, after the second tab is raised, the distance between its root and the second jig becomes larger. During welding, the weld length of the second tab on the upper side becomes shorter, and the unwelded portion becomes longer. The weld length of the second tab on the lower side becomes longer, and the unwelded portion becomes shorter. The upper second tab expands downward due to its lengthening, and the lower second tab changes from bending upward to bending downward due to its shortening. Therefore, after multiple electrode assemblies are combined, the shape of the multiple second tabs is approximately C-shaped. After being assembled into the shell, the C-shaped second tabs fully utilize the folded tab space within the battery cell, thereby reducing the possibility of the second tab extending into the interior of the electrode sheet, improving the redundancy of the second tab, reducing the possibility of the main body being bent by the second tab and causing a short circuit, improving the quality of the electrode assembly, and improving the reliability of the battery cell. Furthermore, for the first tab, since it is relatively thin, the second spacer is provided to alleviate the phenomenon that its appearance is deteriorated due to the elevation of the main body.

[0007] In some embodiments, the first spacer is detachably connected to the support member, and / or the second spacer is detachably connected to the first fixture.

[0008] In the above technical solution, the first spacer is configured to be detachably connected to the support member. Under the premise of convenient installation and disassembly, the first spacer can be connected to the support member without movement, thereby reducing the possibility of the first spacer moving during the welding process and thus affecting the welding. The second spacer is configured to be detachably connected to the first jig. Under the premise of convenient installation and disassembly, the second spacer can be connected to the first jig without movement, thereby reducing the possibility of the second spacer moving during the welding process and thus affecting the welding.

[0009] In some embodiments, the total thickness of at least one first spacer located above or below the support member is h1, and the total thickness of at least one second spacer located below the first fixture is h2, and h1 and h2 satisfy: h1≤h2.

[0010] In the above technical solution, since the thickness of the first tab is relatively thin, the total height of the first spacer is set to be less than or equal to the total height of the second spacer. This is equivalent to reducing the distance between the base of the first tab and the first jig or keeping the distance unchanged, which can prevent the morphology of the first tab from being deteriorated. When the total height of the first spacer is less than the total height of the second spacer, the reshaped morphology of the first tab is improved.

[0011] In some embodiments, the first spacer and the second spacer are both plate-shaped members with a preset thickness.

[0012] In the above technical solution, the first raising member and the second raising member are set as plate-shaped members with a fixed thickness. In this way, it is not only simple and convenient to use, but also has a high raising accuracy.

[0013] In some embodiments, the first spacer has a first identification portion for marking the thickness of the first spacer; and / or the second spacer has a second identification portion for marking the thickness of the second spacer.

[0014] In the above technical solution, by setting the first identification part and / or the second identification part, the operator can directly obtain the thickness information of the first cushioning member and / or the second cushioning member, especially when the first cushioning member or the second cushioning member has multiple different thicknesses, it is easier to distinguish them.

[0015] In some embodiments, the first spacer is provided with a first positioning portion, the support member is provided with a second positioning portion, and the first positioning portion and the second positioning portion are plugged into each other to position the support member and the first spacer relative to each other.

[0016] In the above technical solution, the first spacer and the support member are positioned so that they can be easily connected in the next step after alignment.

[0017] In some embodiments, there are multiple first spacer components, and the multiple first spacer components are arranged in sequence along the thickness direction of the first spacer component, and any two adjacent first spacer components are matched in a concave-convex manner.

[0018] In the above technical solution, any two adjacent first spacers are configured to be concave-convex fitting, so that a limiting effect can be formed on the multiple first spacers, so as to facilitate subsequent fixing of the multiple first spacers on the support member.

[0019] In some embodiments, there are multiple second spacer components, and the multiple second spacer components are arranged in sequence along the thickness direction of the second spacer component, and any two adjacent second spacer components are matched in a concave-convex manner.

[0020] In the above technical solution, any two adjacent second spacers are configured to be concave-convex fitting, so that a limiting effect can be formed on the multiple second spacers, making it easier to subsequently fix the multiple second spacers on the first fixture or other structure.

[0021] In some embodiments, the support member includes a base, multiple first limiting portions and multiple second limiting portions. The base is used to support the main body. The first limiting portion and the second limiting portion are both protruding from the base along the first direction. The multiple first limiting portions are relatively arranged along the second direction to limit the main body in the second direction. The multiple second limiting portions are relatively arranged along the third direction to limit the main body in the third direction. The first direction is parallel to the arrangement direction of the support member to the first raising member, and the second direction is parallel to the arrangement direction of the first jig and the second jig projected on the same plane along the first direction. The first direction, the second direction and the third direction intersect with each other.

[0022] In the above technical solution, multiple first limiting portions limit the main body along the second direction, and multiple second limiting portions limit the main body along the third direction, thereby reducing movement of the main body in the second and third directions during welding. Furthermore, the first and second limiting portions are arranged to protrude from the base, thereby achieving a better limiting effect.

[0023] In some embodiments, the first fixture is provided with a limiting groove for limiting the adapter, and / or the second fixture is provided with a limiting groove for limiting the adapter.

[0024] In the above technical solution, the limiting groove is used to limit the adapter, which facilitates the placement of the adapter and the welding of the tab.

[0025] In some embodiments, the first raising member is located above the supporting member, and the supporting device further includes a first bottom plate and a second bottom plate, the first bottom plate is located below the second raising member, and the second bottom plate is located below the second fixture, the first bottom plate and the second bottom plate are both connected to the supporting member, the first bottom plate, the second raising member and the first fixture are connected in sequence, and the second bottom plate is connected to the second fixture.

[0026] In the above technical solution, a first base plate is provided to provide a mounting base for the second raising member, thereby facilitating the positioning of the second raising member. A second base plate is provided to provide a mounting base for the second fixture, thereby facilitating the positioning of the second fixture.

[0027] In some embodiments, the second padding member is provided with a third positioning portion, the first base plate is provided with a fourth positioning portion, and the third positioning portion and the fourth positioning portion are plugged into each other to position the first base plate and the second padding member relative to each other.

[0028] In the above technical solution, the second spacer and the first base plate are positioned so that they can be easily connected in the next step after being aligned.

[0029] In a second aspect, an embodiment of the present application further provides a welding device, comprising the above-mentioned supporting device and welding mechanism, the welding mechanism being used to weld together a plurality of first tabs and one of the adapters and to weld together a plurality of second tabs and another adapter.

[0030] In a third aspect, embodiments of the present application further provide a battery cell comprising a housing, a plurality of electrode assemblies, an adapter assembly, and a terminal assembly. The plurality of electrode assemblies are positioned within the housing, forming two electrode units. The electrode units comprise a main body, a plurality of first tabs clustered together, and a plurality of second tabs clustered together. The first tab and the second tab are disposed on the same side of the main body and have opposite polarities. The thickness of the first tab is less than that of the second tab. The plurality of second tabs comprise inner tabs and outer tabs. In the thickness direction of the electrode unit, the outer tabs are closer to the housing than the inner tabs. The adapter assembly is positioned within the housing, comprising a first adapter and a second adapter. The first adapter is welded to the plurality of first tabs, and the second adapter is welded to the plurality of second tabs. The terminal assembly is disposed within the housing, comprising a first electrode terminal and a second electrode terminal. The first electrode terminal is connected to the first adapter, and the second electrode terminal is connected to the second adapter. The unwelded portion of the inner tab is longer than the unwelded portion of the outer tab.

[0031] In a fourth aspect, an embodiment of the present application further provides a battery device comprising the above-mentioned battery cell.

[0032] In a fifth aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery device, which is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0034] Figure 1 A schematic structural diagram of a support device and an electrode assembly provided in some embodiments of the present application;

[0035] Figure 2 Another structural schematic diagram of a support device and an electrode assembly provided in some embodiments of the present application;

[0036] Figure 3 A schematic structural diagram of a support device provided in some embodiments of the present application;

[0037] Figure 4 Renderings of battery cells formed without using a support device during the welding process provided in some embodiments of the present application;

[0038] Figure 5 Renderings of battery cells formed using a support device in a welding process according to some embodiments of the present application;

[0039] Figure 6 A schematic structural diagram of a support member and a first spacer member in a support device provided in some embodiments of the present application;

[0040] Figure 7 A schematic structural diagram of a plurality of first spacer members in a support device provided in some embodiments of the present application;

[0041] Figure 8 A schematic structural diagram of a first base plate and a second spacer in a support device provided in some embodiments of the present application;

[0042] Figure 9 A schematic structural diagram of a battery cell provided in some embodiments of the present application;

[0043] Figure 10 A schematic diagram of a partial structure of a battery cell provided in some embodiments of the present application;

[0044] Figure 11 A schematic structural diagram of a battery device provided in some embodiments of the present application;

[0045] Figure 12 A schematic structural diagram of a vehicle provided for some embodiments of the present application.

[0046] The reference numerals for the specific embodiments are as follows:

[0047] 100, support device; 200, electrode assembly; 210, main body; 220, first electrode tab; 230, second electrode tab; 240, inner electrode tab; 250, outer electrode tab; 300, battery cell; 310, first adapter; 320, second adapter; 330, first electrode terminal; 340, second electrode terminal; 350, housing; 400, electrode unit; 500, battery device; 510, housing; 520, battery cell assembly; 600, vehicle; 610, controller; 620, motor;

[0048] 1. Support member; 11. Second positioning portion; 12. Base; 13. First limiting portion; 14. Second limiting portion;

[0049] 2. Jig component; 21. First jig; 22. Second jig; 23. Limiting slot;

[0050] 3. Heightening assembly; 31. First heightening member; 311. First positioning portion; 32. Second heightening member; 321. Third positioning portion;

[0051] 4. First bottom plate; 41. Fourth positioning portion;

[0052] 5. Second base plate;

[0053] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0054] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0056] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0058] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0059] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0060] The term "plurality" used in this application refers to two or more (including two).

[0061] In this application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, and the embodiments of this application are not limited thereto. Battery cells may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of this application are not limited thereto.

[0062] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell primarily relies on the movement of metal ions between the positive and negative electrode sheets to operate. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector includes a positive coating area and a positive electrode tab connected to the positive coating area. The positive coating area is coated with the positive active material layer, while the positive electrode tab is not coated with the positive active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes a positive active material. The positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, which is coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating region and a negative electrode tab connected to the negative electrode coating region. The negative electrode coating region is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The negative electrode current collector can be made of copper, and the negative electrode active material layer includes a negative electrode active material, which can be carbon or silicon. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene).

[0063] During the battery cell manufacturing process, the copper tabs of the electrode assembly need to be welded to one adapter, and the aluminum tabs to the other adapter. During this process, due to the thickness of the aluminum tabs, the overall shape of the multiple tabs is S-shaped. The S-shaped aluminum tabs are relatively redundant and can easily deform the top electrode sheet connected to the aluminum tabs. Part of the aluminum tab can even extend into the electrode sheet, causing a short circuit in the battery cell.

[0064] In view of this, the present application provides a supporting device, which raises the electrode assembly and the thinner copper tab by setting a first pad and a second pad. In this way, the distance between the root of the thicker aluminum tab and the adapter is increased, thereby achieving the shaping of the appearance of the aluminum tab, changing it from an S-shape to a C-shape, improving its redundancy problem, and improving the quality of the electrode assembly.

[0065] Figure 1 A schematic structural diagram of a support device and an electrode assembly provided in some embodiments of the present application; Figure 2 Another structural schematic diagram of a support device and an electrode assembly provided in some embodiments of the present application; Figure 3 A schematic structural diagram of a support device provided in some embodiments of the present application.

[0066] like Figures 1 to 3 As shown, the present application also provides a support device 100 for use in the welding process of the adapter and the electrode assembly 200. At least one electrode assembly 200 forms an electrode unit 400, and the electrode unit 400 includes a main body 210, a plurality of first pole tabs 220, and a plurality of second pole tabs 230. The first pole tabs 220 and the second pole tabs 230 are arranged on the same side of the main body 210 and have opposite polarities. The thickness of the first pole tab 220 is less than the thickness of the second pole tab 230. The support device 100 includes a support member 1, a jig assembly 2, and a spacer assembly 3. The support member 1 is used to support and limit the main body 210. The jig assembly 2 includes a first jig 21 and a second jig 22. The first jig 21 is used to support and limit the adapter welded to the first pole tab 220, and the second jig 22 is used to support and limit the adapter welded to the second pole tab 230. The raising component 3 includes at least one first raising member 31 and at least one second raising member 32. At least one first raising member 31 is arranged above or below the support member 1 and is used to raise the main body 210. At least one second raising member 32 is arranged below the first jig 21 and is used to raise the first jig 21.

[0067] The electrode unit 400 of this embodiment may include one, two or more electrode assemblies 200. All first electrode tabs 220 of the electrode unit 400 are gathered together and welded to one adapter, and all second electrode tabs 230 of the electrode unit 400 are gathered together and welded to another adapter.

[0068] The support member 1 of this embodiment may be a support seat structure having a groove for limiting the position of the main body 210 of the electrode assembly 200. The support member 1 limits the main body 210 to reduce movement of the main body 210 during welding.

[0069] The first fixture 21 of this embodiment can be limited by a groove limiting adapter, a protruding limiting adapter, or other structures. The second fixture 22 is also limited in the same way, and this application will not repeat it here.

[0070] The first spacer 31 of this embodiment can simply abut against the support member 1 or be connected by a connection method such as bolt connection. The second spacer 32 of this embodiment can simply abut against the first fixture 21 or be connected by a connection method such as bolt connection.

[0071] The first raising member 31 of this embodiment can be a plate-shaped structure, a strip-shaped structure or other shapes, and the same is true for the second raising member 32.

[0072] Optionally, the first electrode tab 220 is a copper electrode tab, which is a negative electrode tab, and the second electrode tab 230 is an aluminum electrode tab, which is a positive electrode tab.

[0073] The provision of the first raising member 31 in this embodiment does not affect the limiting effect of the supporting member 1 on the main body 210 .

[0074] In this embodiment, the total thickness of the at least one first spacer 31 is h1, and the total thickness of the at least one second spacer 32 is h2. h1 may be greater than, less than, or equal to h2.

[0075] The support device 100 of this embodiment is provided with a first padding member 31 at the support member 1 and a second padding member 32 at the first fixture 21. After the support member 1 pads the electrode unit 400, the second fixture 22 is not padded. Therefore, after the second pole ear 230 is padded, the distance between the root and the second fixture 22 becomes larger. When welding, the welding length of the second pole ear 230 on the upper side becomes shorter and the unwelded part becomes longer. The welding length of the second pole ear 230 on the lower side becomes longer and the unwelded part becomes shorter. Therefore, after the multiple electrode assemblies 200 are cored, the second pole ear 230 on the upper side is 0 represents the inner tab, which expands outward due to lengthening. The lower second tab 230 represents the outer tab, which changes from curving inward to curving outward due to shortening. Therefore, the shape of the multiple second tabs 230 is approximately C-shaped. After being assembled into the battery cell, the C-shaped second tabs 230 fully utilize the folded tab space within the battery cell, thereby reducing the possibility of the second tabs 230 extending into the interior of the electrode sheet. This improves the redundancy of the second tabs 230 and reduces the possibility of the main body 210 being bent by the second tabs 230 and causing a short circuit. This improves the quality of the electrode assembly 200 and the reliability of the battery cell. Furthermore, since the first tab 220 is relatively thin, the second spacer 32 is provided to mitigate the deterioration of its appearance due to the elevation of the main body 210.

[0076] Figure 4The effect diagram of the battery cell formed in the welding process without using a support device is provided in some embodiments of the present application. Figure 5 This is a rendering of a battery cell formed using a supporting device in a welding process provided in some embodiments of the present application.

[0077] See also Figure 4 and Figure 5 , Figure 4 and Figure 5 The second pole tabs 230 are shown in FIG. 2 , wherein the inner second pole tab 230 is the second pole tab 230 located on the upper side during welding, and the outer second pole tab 230 is the second pole tab 230 located on the lower side during welding.

[0078] In some embodiments, the first spacer 31 is detachably connected to the support member 1 , and / or the second spacer 32 is detachably connected to the first fixture 21 .

[0079] In this embodiment, the first raising member 31 and the supporting member 1 can be detachably connected by bolt connection or plug-in connection.

[0080] In this embodiment, the second raising member 32 and the first fixture 21 can be detachably connected by bolt connection or plug-in connection.

[0081] The first pad 31 is configured to be detachably connected to the support member 1. Under the premise of convenient installation and disassembly, the first pad 31 can be connected to the support member 1 without moving, thereby reducing the possibility of the first pad 31 moving during the welding process and affecting the welding.

[0082] The second pad 32 is configured to be detachably connected to the first jig 21. Under the premise of convenient installation and disassembly, the second pad 32 can be connected to the first jig 21 without moving, thereby reducing the possibility of the second pad 32 moving during the welding process and affecting the welding.

[0083] In some embodiments, the total thickness of at least one first pad 31 above or below the support member 1 is h1, and the total thickness of at least one second pad 32 below the first fixture 21 is h2, and h1 and h2 satisfy: h1≤h2.

[0084] In this embodiment, the number of the first raising member 31 can be one or more, and the number of the second raising member 32 can be one or more.

[0085] Optionally, h1<h2.

[0086] Since the first tab 220 is relatively thin, the total height of the first spacer 31 is set to be less than or equal to the total height of the second spacer 32. This is equivalent to reducing the distance between the base of the first tab 220 and the first fixture 21 or keeping the distance unchanged, which can prevent the morphology of the first tab 220 from being deteriorated. When the total height of the first spacer 31 is less than the total height of the second spacer 32, the reshaped morphology of the first tab 220 is improved.

[0087] In some embodiments, the first spacer 31 and the second spacer 32 are both plate-shaped members with a preset thickness.

[0088] The preset thickness of the first spacer 31 of this embodiment is determined according to the actual usage scenario. For example, the preset thickness is 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm.

[0089] The preset thickness of the second spacer 32 of this embodiment is determined according to the actual usage scenario. For example, the preset thickness is 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm.

[0090] The first raising member 31 and the second raising member 32 are set as plate-shaped members with a fixed thickness. In this way, it is not only simple and convenient to use, but also has a higher raising precision.

[0091] In some embodiments, the first padding member 31 has a first identification portion for marking the thickness of the first padding member 31 ; and / or the second padding member 32 has a second identification portion for marking the thickness of the second padding member 32 .

[0092] The first identification portion of this embodiment can be a sticker attached to the first raising member 31, or can be formed by physical or chemical etching, or printed, etc. The second identification portion can be a sticker attached to the second raising member 32, or can be formed by physical or chemical etching, or printed, etc.

[0093] By providing the first identification portion and / or the second identification portion, the operator can directly obtain the thickness information of the first cushioning member 31 and / or the second cushioning member 32, especially when the first cushioning member 31 or the second cushioning member 32 has multiple different thicknesses, it is easier to distinguish them.

[0094] Figure 6 This is a schematic structural diagram of the support member and the first raising member in the support device provided in some embodiments of the present application.

[0095] See also Figure 6In some embodiments, the first padding member 31 is provided with a first positioning portion 311, and the support member 1 is provided with a second positioning portion 11. The first positioning portion 311 and the second positioning portion 11 are plugged into each other to position the support member 1 and the first padding member 31 relative to each other.

[0096] In this embodiment, the first positioning portion 311 and the second positioning portion 11 are plug-fitted. For example, the first positioning portion 311 can be a protrusion or a groove, and the second positioning portion 11 can be a corresponding groove or protrusion. For example, the first positioning portion 311 can be a protrusion or a through hole, and the second positioning portion 11 can be a corresponding through hole or protrusion.

[0097] This arrangement is used to position the first raising member 31 and the supporting member 1 , making it easier to carry out the next step of connection after alignment.

[0098] Figure 7 This is a schematic structural diagram of multiple first cushioning members in the support device provided in some embodiments of the present application.

[0099] See also Figure 7 In some embodiments, there are multiple first padding members 31 , and the multiple first padding members 31 are arranged in sequence along the thickness direction of the first padding members 31 , and any two adjacent first padding members 31 are matched in a concave-convex manner.

[0100] The concave-convex fit between any two adjacent first spacers 31 in this embodiment of the application means that any two adjacent first spacers 31 are provided with a convex portion and a concave portion respectively, and the convex portion and the concave portion fit together in a concave-convex manner. In this embodiment, the convex portion is a protruding structure, and the concave portion is a groove or a through hole.

[0101] In this embodiment, the number of first spacer members 31 can be two, three, or four. When the number of first spacer members 31 is greater than or equal to three, the first spacer member 31 located in the middle is provided with a convex portion and a concave portion on opposite sides thereof, respectively, and the two first spacer members 31 located at the edges can be provided with only a convex portion or only a concave portion.

[0102] Any two adjacent first spacers 31 are configured to be concave-convex fitting, so that a limiting effect can be formed on the multiple first spacers 31 to facilitate subsequent fixing of the multiple first spacers 31 on the support member 1.

[0103] In some embodiments, there are multiple second spacer components 32 , and the multiple second spacer components 32 are sequentially arranged along the thickness direction of the second spacer components 32 , and any two adjacent second spacer components 32 are matched with each other in a concave-convex manner.

[0104] The concave-convex fit of any two adjacent second spacers 32 in this embodiment of the application means that any two adjacent second spacers 32 are respectively provided with a convex portion and a concave portion, and the convex portion and the concave portion fit together in a concave-convex manner. In this embodiment, the convex portion is a protruding structure, and the concave portion is a groove or a through hole.

[0105] In this embodiment, the number of the second spacer members 32 can be two, three, or four. When the number of the second spacer members 32 is greater than or equal to three, the second spacer member 32 located in the middle is provided with a convex portion and a concave portion on opposite sides thereof, respectively, and the two second spacer members 32 located at the edges can be provided with only a convex portion or only a concave portion.

[0106] Any two adjacent second spacers 32 are configured to be concave-convex fitting, so that a limiting effect can be formed on the plurality of second spacers 32, so as to facilitate the subsequent fixing of the plurality of second spacers 32 on the first fixture 21 or other structures.

[0107] Please continue to refer to Figure 3 In some embodiments, the support member 1 includes a base 12, a plurality of first limiting portions 13, and a plurality of second limiting portions 14. The base 12 is used to support the main body 210. The first limiting portions 13 and the second limiting portions 14 are both protruding from the base 12 along the first direction X. The plurality of first limiting portions 13 are relatively arranged along the second direction Y to limit the main body 210 in the second direction Y. The plurality of second limiting portions 14 are relatively arranged along the third direction Z to limit the main body 210 in the third direction Z. The first direction X is parallel to the arrangement direction of the support member 1 to the first raising member 31, and the second direction Y is parallel to the arrangement direction of the first fixture 21 and the second fixture 22 projected along the first direction X on the same plane. The first direction X, the second direction Y, and the third direction Z intersect with each other.

[0108] Optionally, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0109] In this embodiment, multiple first limiting portions 13 are relatively arranged along the second direction Y. There may be two first limiting portions 13 relatively arranged, or three or more first limiting portions 13 relatively arranged along the second direction Y, wherein multiple first limiting portions 13 are provided on at least one side.

[0110] In this embodiment, multiple second limiting portions 14 are relatively arranged along the third direction Z. There may be two second limiting portions 14 relatively arranged, or three or more second limiting portions 14 relatively arranged along the third direction Z, wherein multiple second limiting portions 14 are provided on at least one side.

[0111] The second direction Y of this embodiment is an arrangement direction of a projection of the first jig 21 along the first direction X on a plane to a projection of the second jig 22 along the first direction X on the plane.

[0112] The plurality of first limiting portions 13 limit the main body 210 along the second direction Y, and the plurality of second limiting portions 14 limit the main body 210 along the third direction Z, thereby reducing movement of the main body 210 along the second direction Y and the third direction Z during welding. Furthermore, the first limiting portions 13 and the second limiting portions 14 are arranged to protrude from the base 12, thereby achieving a better limiting effect.

[0113] In some embodiments, the first fixture 21 is provided with a limiting groove 23 for limiting the adapter, and / or the second fixture 22 is provided with a limiting groove 23 for limiting the adapter.

[0114] Optionally, the limiting groove 23 of the first fixture 21 and the limiting groove 23 of the second fixture 22 have the same shape.

[0115] The limiting groove 23 is used to limit the adapter, which facilitates the placement of the adapter and the welding of the tab.

[0116] In some embodiments, the first raising member 31 is located above the support member 1, and the supporting device 100 also includes a first bottom plate 4 and a second bottom plate 5. The first bottom plate 4 is located below the second raising member 32, and the second bottom plate 5 is located below the second fixture 22. The first bottom plate 4 and the second bottom plate 5 are both connected to the support member 1; the first bottom plate 4, the second raising member 32 and the first fixture 21 are connected in sequence, and the second bottom plate 5 is connected to the second fixture 22.

[0117] In this embodiment, the first bottom plate 4 and the support member 1 can be connected by screw thread connection or welding. The second bottom plate 5 and the support member 1 can be connected by screw thread connection or welding.

[0118] Optionally, the first base plate 4 and the second base plate 5 are integrally provided.

[0119] In this embodiment, the first base plate 4, the second spacer 32 and the first fixture 21 are connected in sequence, and can be connected by bolt and nut assemblies penetrating the three, welding or bonding.

[0120] In this embodiment, the second base plate 5 and the second fixture 22 can be connected by bolt connection, welding or bonding.

[0121] The first base plate 4 is provided to provide a mounting base for the second spacer 32 and facilitate the determination of the position of the second spacer 32. The second base plate 5 is provided to provide a mounting base for the second fixture 22 and facilitate the determination of the position of the second fixture 22.

[0122] Figure 8 This is a schematic structural diagram of the first base plate and the second raising member in the support device provided in some embodiments of the present application.

[0123] See also Figure 8In some embodiments, the second pad 32 is provided with a third positioning portion 321, and the first base plate 4 is provided with a fourth positioning portion 41. The third positioning portion 321 and the fourth positioning portion 41 are plugged into each other to position the first base plate 4 and the second pad 32 relative to each other.

[0124] In this embodiment, the third positioning portion 321 and the fourth positioning portion 41 are plug-fitted. For example, the third positioning portion 321 can be a protrusion or a groove, and the fourth positioning portion 41 can be a corresponding groove or protrusion. In another example, the third positioning portion 321 can be a protrusion or a through hole, and the fourth positioning portion 41 can be a corresponding through hole or protrusion.

[0125] This arrangement is used to position the second raising member 32 and the first base plate 4 , making it easier to carry out the next step of connection after alignment.

[0126] The embodiment of the present application further provides a welding device, comprising the above-mentioned supporting device 100 and a welding mechanism, the welding mechanism being used to weld together a plurality of first tabs 220 and one of the adapters and to weld together a plurality of second tabs 230 and another adapter.

[0127] The welding mechanism of this embodiment can perform welding by laser welding or ultrasonic welding.

[0128] Figure 9 A schematic structural diagram of a battery cell provided in some embodiments of the present application; Figure 10 A schematic diagram of a partial structure of a battery cell provided in some embodiments of the present application.

[0129] See also Figure 9 and Figure 10The present application also provides a battery cell 300, comprising a housing 350, an electrode assembly 200, an adapter assembly, and a terminal assembly. Multiple electrode assemblies 200 are located within the housing 350, and the multiple electrode assemblies 200 form two electrode units 400. The electrode units 400 include a main body 210, a plurality of mutually gathered first pole tabs 220, and a plurality of mutually gathered second pole tabs 230. The first pole tabs 220 and the second pole tabs 230 are arranged on the same side of the main body 210 and have opposite polarities. The thickness of the first pole tab 220 is less than that of the second pole tab 230. The multiple second pole tabs 230 include an inner pole tab 240 and an outer pole tab 250. In the thickness direction of the electrode unit 400, the outer pole tab 250 is closer to the housing 350 than the inner pole tab 240. The adapter assembly is located within the housing 350 and includes a first adapter 310 and a second adapter 320. The first adapter 310 is welded to the plurality of first tabs 220, and the second adapter 320 is welded to the plurality of second tabs 230. A terminal assembly is disposed within the housing 350 and includes a first electrode terminal 330 and a second electrode terminal 340. The first electrode terminal 330 is connected to the first adapter 310, and the second electrode terminal 340 is connected to the second adapter 320. The unwelded portion of the inner tab 240 is longer than the unwelded portion of the outer tab 250.

[0130] The electrode assembly 200 of this embodiment can be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures. The number of electrode assemblies 200 can be two or four.

[0131] The housing 350 of this embodiment can be made of steel, aluminum, plastic (e.g., polypropylene), a composite metal shell (e.g., a copper-aluminum composite shell), or aluminum-plastic film. For example, the housing 350 includes an end cap and a shell. The shell has an opening, and the end cap is positioned to cover the opening. The shell may have one or more openings. One or more end caps may be provided. The terminal assembly is positioned on the end cap.

[0132] Exemplarily, the first electrode tab 220 is a copper electrode tab, which is a negative electrode tab, and the second electrode tab 230 is an aluminum electrode tab, which is a positive electrode tab.

[0133] In this embodiment, the plurality of electrode assemblies 200 form two electrode units 400 . The first electrode tabs 220 of the two electrode units 400 are welded to the first adapter 310 , and the second electrode tabs 230 of the two electrode units 400 are welded to the second adapter 320 .

[0134] The electrode unit 400 of this embodiment can be formed by one electrode assembly 200, such as Figure 9 It can also be formed by two electrode assemblies 200, such as Figure 10As shown, all first electrode tabs 220 of an electrode unit 400 are gathered together and bent together, and all second electrode tabs 230 are gathered together and bent together. Of course, an electrode unit 400 can also include three or more electrode assemblies 200.

[0135] The inner tab 240 and the outer tab 250 of the embodiment of the present application are respectively located at the innermost side and the outermost side of the plurality of second tabs 230 .

[0136] The length of the unwelded portion of the inner tab 240 in the embodiment of the present application refers to the length of the portion of the inner tab 240 that is not welded to the second adapter 320 in its own bending direction, and the length of the unwelded portion of the outer tab 250 refers to the length of the portion of the outer tab 250 that is not welded to the second adapter 320 in its own bending direction.

[0137] In this embodiment, the first electrode terminal 330 and the first adapter 310 may be conductively connected by welding, and the second electrode terminal 340 and the second adapter 320 may be conductively connected by welding.

[0138] The battery cell 300 of this embodiment sets the length of the unwelded portion of the inner pole tab 240 to be greater than the length of the unwelded portion of the outer pole tab 250. In this way, the inner pole tab 240 expands outward, and the outer pole tab 250, due to its shorter length, expands outward along with the inner pole tab 240. The shape of the multiple second pole tabs 230 is approximately C-shaped. The C-shaped second pole tab 230 fully utilizes the folded pole tab space in the battery cell 300, thereby reducing the possibility of the second pole tab 230 extending into the interior of the main body 210, improving the redundancy problem of the second pole tab 230, reducing the possibility of the main body 210 being bent by the second pole tab 230 and short-circuiting, improving the quality of the electrode assembly 200, and improving the reliability of the battery cell 300.

[0139] Figure 11 A schematic structural diagram of a battery device provided in some embodiments of the present application.

[0140] See also Figure 11 , an embodiment of the present application further provides a battery device 500 , comprising the above-mentioned battery cell 300 .

[0141] The battery device 500 mentioned in the embodiment of the present application may include one or more battery cell assemblies 520 for providing voltage and capacity. The battery cell assembly 520 includes a plurality of battery cells 300, which are connected in series, parallel or hybrid via a busbar.

[0142] In some embodiments, the battery cell assembly 520 is typically formed by arranging multiple battery cells 300. For example, the battery cell assembly 520 may be a battery module, which is formed by arranging and securing multiple battery cells 300 to form a single module. For example, the battery module may be formed by bundling multiple battery cells 300 using cable ties.

[0143] In some embodiments, the battery device 500 may be a battery pack, which includes a case 510 and one or more battery cell assemblies 520 , wherein the battery cell assemblies 520 are housed in the case 510 .

[0144] As an example, the battery cell assembly 520 may be a battery module, and the battery cell assembly 520 may be accommodated in the box body 510 by fixing the battery module in the box body 510 .

[0145] As an example, the battery cell assembly 520 may also be housed in the box body 510 by directly fixing the plurality of battery cells 300 to the box body 510 .

[0146] As an example, the housing 510 may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing 510 for accommodating the battery cell assembly 520. Enclosed here means covered or closed, and may be sealed or unsealed. The first housing 510 may be a top cover or a bottom plate.

[0147] As an example, the box body 510 may 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 a closed space is formed inside the box body 510 to accommodate the battery cell assembly 520.

[0148] As an example, the box 510 can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box 510 can become at least a part of the floor of the vehicle, or the frame of the box 510 can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0149] In some embodiments, the battery device 500 refers to an energy storage device, which includes a housing 510 with a door on at least one side of the housing 510. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0150] Figure 12 A schematic structural diagram of a vehicle provided for some embodiments of the present application.

[0151] See also Figure 12 , an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery device 500, and the battery device 500 is used to provide electrical energy.

[0152] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 300 and battery devices 500, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, including aircraft, rockets, space shuttles, and spacecraft. For ease of explanation, the following embodiments are described using a vehicle 600 as an example of an electrical device.

[0153] The vehicle 600 is provided with a battery device 500, which can be provided at the bottom, head, or tail of the vehicle 600. The battery device 500 can be used to power the vehicle 600, for example, the battery device 500 can serve as an operating power source for the vehicle 600.

[0154] The vehicle 600 may further include a controller 610 and a motor 620 . The controller 610 is used to control the battery device 500 to supply power to the motor 620 , for example, to meet the power requirements of the vehicle 600 during startup, navigation, and driving.

[0155] In some embodiments of the present application, the battery device 500 can not only serve as the operating power source of the vehicle 600, but also serve as the driving power source of the vehicle 600, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 600.

[0156] See also Figure 2-Figure 5The embodiment of the present application provides a support device 100 for use in the welding process of an adapter and an electrode assembly 200. At least one electrode assembly 200 forms an electrode unit 400, and the electrode unit 400 includes a main body 210, a plurality of first pole tabs 220, and a plurality of second pole tabs 230. The first pole tabs 220 and the second pole tabs 230 are arranged on the same side of the main body 210 and have opposite polarities. The thickness of the first pole tab 220 is less than the thickness of the second pole tab 230. The support device 100 includes a support member 1, a jig assembly 2, and a spacer assembly 3. The support member 1 is used to support and limit the main body 210. The jig assembly 2 includes a first jig 21 and a second jig 22. The first jig 21 is used to support and limit the adapter welded to the first pole tab 220, and the second jig 22 is used to support and limit the adapter welded to the second pole tab 230. The elevation assembly 3 includes at least one first elevation member 31 and at least one second elevation member 32. The at least one first elevation member 31 is positioned above or below the support member 1 and is used to elevate the main body 210. The at least one second elevation member 32 is positioned below the first jig 21 and is used to elevate the first jig 21. The first elevation member 31 is detachably connected to the support member 1, and the second elevation member 32 is detachably connected to the first jig 21. The total thickness of the at least one first elevation member 31 positioned above or below the support member 1 is h1, and the total thickness of the at least one second elevation member 32 positioned below the first jig 21 is h2. h1 and h2 satisfy the following relationship: h1 ≤ h2. Both the first elevation member 31 and the second elevation member 32 are plate-like members with a predetermined thickness.

[0157] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A support device for use in a welding process between an adapter and an electrode assembly, wherein at least one of the electrode assemblies forms an electrode unit, the electrode unit comprising a main body, a plurality of first electrode tabs, and a plurality of second electrode tabs, the first electrode tabs and the second electrode tabs being disposed on the same side of the main body and having opposite polarities, the thickness of the first electrode tab being smaller than the thickness of the second electrode tab, and characterized in that: The supporting device comprises: A support member, used for supporting and limiting the main body; A jig assembly, comprising a first jig and a second jig, wherein the first jig is used to support and limit the adapter welded to the first tab, and the second jig is used to support and limit the adapter welded to the second tab; The raising component includes at least one first raising member and at least one second raising member, at least one first raising member is arranged above or below the support member and is used to raise the main body, and at least one second raising member is arranged below the first fixture and is used to raise the first fixture.

2. The support device according to claim 1, characterized in that The first spacer is detachably connected to the support member, and / or the second spacer is detachably connected to the first fixture.

3. The supporting device according to claim 1, characterized in that The total thickness of at least one first spacer located above or below the support member is h1, and the total thickness of at least one second spacer located below the first fixture is h2. The h1 and h2 satisfy: h1≤h2.

4. The support device according to claim 1, characterized in that The first spacer and the second spacer are both plate-shaped members with a preset thickness.

5. The supporting device according to claim 4, characterized in that: The first spacer has a first identification portion, and the first identification portion is used to mark the thickness of the first spacer; and / or, The second spacer has a second identification portion, and the second identification portion is used to mark the thickness of the second spacer.

6. The supporting device according to claim 1, characterized in that The first spacer is provided with a first positioning portion, and the support is provided with a second positioning portion. The first positioning portion and the second positioning portion are plugged into and matched with each other to position the support and the first spacer relative to each other.

7. The supporting device according to claim 1, characterized in that There are multiple first padding members, and the multiple first padding members are arranged in sequence along the thickness direction of the first padding member, and any two adjacent first padding members are matched with each other in concave and convex shapes.

8. The supporting device according to claim 1, characterized in that There are multiple second padding members, and the multiple second padding members are arranged in sequence along the thickness direction of the second padding member, and any two adjacent second padding members are matched with each other in a concave-convex manner.

9. The supporting device according to claim 1, characterized in that The support member includes a base, a plurality of first limiting portions and a plurality of second limiting portions, the base is used to support the main body, the first limiting portion and the second limiting portion are both protruding from the base along a first direction, the plurality of first limiting portions are relatively arranged along a second direction to limit the main body in the second direction, and the plurality of second limiting portions are relatively arranged along a third direction to limit the main body in the third direction, the first direction is parallel to the arrangement direction of the support member to the first spacer, the second direction is parallel to the arrangement direction of the first jig and the second jig projected on the same plane along the first direction, and the first direction, the second direction and the third direction intersect with each other.

10. The supporting device according to claim 1, characterized in that The first fixture is provided with a limiting groove for limiting the adapter, and / or the second fixture is provided with a limiting groove for limiting the adapter.

11. The supporting device according to claim 1, characterized in that: The first pad is located above the support member, and the support device also includes a first bottom plate and a second bottom plate, the first bottom plate is located below the second pad, and the second bottom plate is located below the second jig, the first bottom plate and the second bottom plate are both connected to the support member, the first bottom plate, the second pad and the first jig are connected in sequence, and the second bottom plate is connected to the second jig.

12. The supporting device according to claim 11, characterized in that The second padding member is provided with a third positioning portion, and the first bottom plate is provided with a fourth positioning portion. The third positioning portion and the fourth positioning portion are plugged and matched to position the first bottom plate and the second padding member relative to each other.

13. A welding device, characterized in that: include: The support device according to any one of claims 1 to 12; The welding mechanism is used to weld the plurality of first electrode tabs and one of the adapters together, and to weld the plurality of second electrode tabs and another of the adapters together.

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