Tab shaping device and battery production system

Abstract

The embodiment of the utility model provides a tab shaping device and a battery production system, and relates to the technical field of batteries. The tab shaping device comprises a tab shaping assembly, the tab shaping assembly comprises a connecting mechanism and a shaping mechanism which are connected with each other, the shaping mechanism comprises a flattening part and a folding part, at least one of two opposite ends of the flattening part is connected with the folding part, and the flattening part is used for flattening a tab; and the folding part is used for folding the external expansion part of the tab towards the direction close to the tab. The shaping mechanism is designed to comprise the flattening part and the folding part, so that not only can the tab of the battery be flattened and shaped, but also the externally-expanded part of the tab can be shaped and folded, and the possibility of poor bending of the externally-expanded part and contact with a battery shell is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a tab shaping device and a battery production system. Background Art

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

[0003] In order to enhance the heat dissipation capacity of the battery tabs, the tabs of some power batteries have an outward expansion portion, which helps to dissipate heat into the shell of the battery cell. However, the outward expansion portion is prone to bad bending during the production process and may even come into contact with the battery shell and cause a short circuit. Utility Model Content

[0004] The present application provides a tab shaping device, which can shape the outwardly expanded portion of the tab, thereby reducing the possibility of undesirable bending of the outwardly expanded portion of the tab.

[0005] In the first aspect, the embodiment of the present application provides a tab shaping device for shaping a battery tab, characterized in that it includes a tab shaping assembly, the tab shaping assembly includes a connecting mechanism and a shaping mechanism installed on the connecting mechanism, the shaping mechanism includes a flattening portion and a retracting portion, at least one of the two opposite ends of the flattening portion is connected to the retracting portion, the flattening portion is used to flatten the battery tab and the outward expansion portion of the battery tab, and the retracting portion is used to retract the outward expansion portion in a direction close to the battery tab. By designing the shaping mechanism to include a flattening portion and a retracting portion, in addition to being able to flatten and shape the battery tab of the battery, the outward expansion portion can also be shaped and retracted, reducing the possibility of bad bending of the outward expansion portion and contact with the battery shell.

[0006] In some embodiments of the present application, the flattening portion includes a flattening member, the folding portion includes a folding member, the flattening member is connected to the connecting mechanism, at least one of the two opposite ends of the flattening member is provided with the folding member, the flattening member is provided with a flat pressing surface for flattening the battery tab, the folding member is provided with a folding surface for folding the expanded portion, and the flat pressing surface and the folding surface are connected at an angle. By designing the flattening portion as a flattening member, designing the folding portion as including a folding member, and using the flat pressing surface of the flattening member and the folding surface of the folding member to shape the battery tab, the structure is simple and the cost is low.

[0007] In some embodiments of the present application, the pressing plane and the gathering surface are vertically connected. By designing the pressing plane and the gathering surface to be vertically connected, the free end of the shaped outward expansion portion can be closer to the battery tab and the battery cell, further reducing the possibility of the outward expansion portion contacting the battery shell.

[0008] In some embodiments of the present application, the shaping mechanism is provided with a reinforcement structure at the connection between the flattening member and the folding member, and the reinforcement structure is connected to the flattening member and the folding member respectively. The reinforcement structure can improve the connection stability between the flattening member and the folding member, and reduce the possibility of unnecessary relative displacement between the two during flattening.

[0009] In some embodiments of the present application, the flattening member and the folding member are connected as one piece. By designing the flattening member and the folding member to be connected as one piece, the connection stability between the two can be ensured.

[0010] In some embodiments of the present application, the flattening portion includes a first roller, the folding portion includes a second roller, at least one of the two opposite ends of the first roller is coaxially connected to the second roller, the radial dimension of the second roller is larger than the radial dimension of the first roller, and the first roller and the second roller can rotate around their own axes. By shaping the battery tab with the first roller and the second roller, only rolling friction can be generated with the battery tab during flattening by the rotation of the first roller and the second roller, thereby reducing the wear of the battery tab during the shaping process.

[0011] In some embodiments of the present application, the second rolling member includes a first end and a second end facing each other, the first end is connected to the first rolling member, and the radial dimension of the second rolling member gradually increases from the first end to the second end. By designing the radial dimension of the second rolling member to gradually increase from the first end to the second end, the outer wall of the second rolling member is guided when the outward expansion portion is bent, thereby improving the shaping efficiency. At the same time, the second rolling member has multiple positions with different radial dimensions, which can be adapted to battery tabs of different width specifications.

[0012] In some embodiments of the present application, the outer wall surface of the second rolling member from the first end to the second end is a curved surface. By designing the outer wall surface of the second rolling member as a curved surface, a better effect of guiding the outward expansion part to bend is achieved.

[0013] In some embodiments of the present application, the shaping mechanism further includes an axis frame and a rotating shaft mounted on the axis frame, the axis frame is connected to the connecting mechanism, the axial direction of the rotating shaft is consistent with the axial direction of the first rolling member, and the first rolling member and / or the second rolling member is connected to the rotating shaft in a manner that can rotate around their own axial direction. By configuring the axis frame and the rotating shaft, the rotation of the first rolling member and the second rolling member can be facilitated.

[0014] In some embodiments of the present application, the first roller and the second roller are connected as one piece. By designing the first roller and the second roller to be connected as one piece, the connection stability between the two can be improved, thereby improving the overall structural stability of the shaping mechanism.

[0015] In some embodiments of the present application, the connecting mechanism includes a first connecting member and a second connecting member, the first connecting member is connected to the shaping mechanism, the second connecting member is connected to the first connecting member and is used to connect the battery tab shaping device, and the second connecting member is configured to be positionally adjustable on the first connecting member so that the shaping mechanism can be close to or away from the second connecting member. By configuring the second connecting member to be positionally adjustable on the first connecting member, it is possible to adjust the height of the shaping mechanism on the shaping device so as to adapt to batteries of different specifications and sizes.

[0016] In some embodiments of the present application, the second connector is provided with a socket, and the first connector is inserted into the socket. The socket enables the first connector and the second connector to form a plug-in fit, which has a simple structure and facilitates the height adjustment of the entire machine mechanism.

[0017] In some embodiments of the present application, the connection mechanism further includes a locking member, the second connection member is provided with a locking hole, the locking member is inserted into the locking hole, and is used to compress the portion of the first connection member located in the insertion hole. By configuring the locking member, the first connection member and the second connection member after the position adjustment can be locked by the locking member, thereby improving the connection stability of the two.

[0018] In some embodiments of the present application, the locking member is threadedly connected to the locking hole. By designing the locking member and the locking hole to be threadedly connected, the first connecting member and the second connecting member can be locked or unlocked by screwing the locking member, which has a simple structure and is easy to operate.

[0019] In some embodiments of the present application, the tab shaping device further comprises a moving assembly, which is connected to the connecting mechanism and is used to drive the tab shaping assembly to move. The moving assembly drives the tab shaping mechanism to move to perform shaping operations, thereby achieving mechanization of shaping.

[0020] In a second aspect, an embodiment of the present application provides a battery production system, including a tab shaping device of the above technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 paying creative work.

[0022] Figure 1 A cross-sectional view of a tab shaping assembly of a tab shaping device provided in some embodiments of the present application;

[0023] Figure 2 A side view of a tab shaping assembly of a tab shaping device provided in some embodiments of the present application;

[0024] Figure 3 A schematic diagram of the working state of a tab shaping component of a tab shaping device provided in some embodiments of the present application at a first viewing angle;

[0025] Figure 4 for Figure 3 A magnified view of part a;

[0026] Figure 5 A schematic diagram of the working state of a tab shaping component of a tab shaping device provided in some embodiments of the present application at a second viewing angle;

[0027] Figure 6 A cross-sectional view of another tab shaping assembly of a tab shaping device provided in some embodiments of the present application;

[0028] Figure 7 A side view of another tab shaping assembly of a tab shaping device provided in some embodiments of the present application;

[0029] Figure 8 A schematic diagram of the working state of another tab shaping component of the tab shaping device provided in some embodiments of the present application at a first viewing angle;

[0030] Fig. 9 for Figure 8 A magnified view of part b;

[0031] Fig.10 A schematic diagram of the working state of another tab shaping component of the tab shaping device provided in some embodiments of the present application at a second viewing angle.

[0032] The reference numerals of the specific embodiments are as follows:

[0033] 100. Tab shaping components;

[0034] 10. Connecting mechanism; 11. First connecting member; 12. Second connecting member; 121. Insertion hole; 122. Locking hole; 13. Locking member;

[0035] 20. shaping mechanism; 21. flattening portion; 211. flattening member; 2111. flattening plane; 212. first rolling member; 22. gathering portion; 221. gathering member; 2211. gathering surface; 222. second rolling member; 2221. first end; 2222. second end; 23. reinforcing structure; 24. shaft frame; 25. rotating shaft;

[0036] 200, battery cell; 210, battery tab; 2101, external expansion part. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments 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", "second", etc. 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 and secondary relationship.

[0039] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0042] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0043] The term "plurality" used in the present application refers to two or more (including two).

[0044] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a battery box for encapsulating one or more battery cells. The battery box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0045] The battery cells mentioned in the embodiments of the present application may be 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, etc., which are not limited in the embodiments of the present application. The battery cells may be cylindrical, flat, cuboid or other shapes, which are not limited in the embodiments of the present application.

[0046] The battery cell mentioned in the embodiments of the present application may include an electrode assembly and an electrolyte, and the electrode assembly includes 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 current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector; the positive current collector includes a positive electrode coating area and a positive electrode ear connected to the positive electrode coating area, the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode ear is not coated with a positive electrode 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 electrode active material layer includes a positive electrode active material, and the positive electrode 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, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, and the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.

[0047] The battery cells described in the embodiments of the present application are suitable for batteries and electrical devices using batteries. Electrical devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0048] Below, the embodiments of the present application are described in detail.

[0049] At present, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0050] In the production process of battery cells, the tabs need to be bent and gathered together toward the core axis of the electrode assembly by a tab shaping device so as to facilitate welding and installation into the shell. With the increasing demand for fast charging, fast charging will cause significant heating problems in the battery, posing a major risk to the safety of the battery cells. In order to improve the heat dissipation performance of the battery cells, the related technology provides an expansion part on the tabs, which is used to enhance the heat dissipation of the tabs, so as to effectively conduct the heat generated by the tabs to the inside of the battery cell shell.

[0051] However, the outward expansion part of the tab is prone to bad bending during the production process of the battery cell (for example, the assembly process of the tab), and may even come into contact with the battery shell and cause a short circuit. The existing tab shaping device is unable to shape the outward expansion part, which undoubtedly affects the quality and stability of the battery cell.

[0052] Therefore, how to shape the expanded part of the tab to improve the quality and stability of the battery cell is an important issue in battery production and processing.

[0053] In view of this, the present application provides a technical solution, which is configured with a flattening portion and a gathering portion, the flattening portion is used to flatten the pole ear, and the gathering portion is used to gather the outward expansion portion of the pole ear to reduce the possibility of bad bending of the outward expansion portion of the pole ear and contact with the battery shell.

[0054] The following is combined with Figure 1-8 The tab shaping device provided in the embodiment of the present application is described.

[0055] Combined with Figure 1 and attached Figure 2 As shown in, an embodiment of the present application provides a tab shaping device for shaping a battery tab 210. The tab shaping assembly 100 includes a connecting mechanism 10 and a shaping mechanism 20. The connecting mechanism 10 is used to connect a moving assembly of the tab shaping device; the shaping mechanism 20 includes a flattening portion 21 and a retracting portion 22. The retracting portion 22 is provided at at least one of the two opposite ends of the flattening portion 21. The flattening portion 21 is used to flatten the battery tab 210 and its outwardly expanded portion 2101, and the retracting portion 22 is used to retract the outwardly expanded portion 2101 in a direction close to the tab.

[0056] The connecting mechanism 10 of this embodiment can be used to connect the original moving component of the pole lug shaping device. The moving component can be a mechanical arm, a moving wheel, a transmission chain, a transmission belt and other structures. The moving component drives the pole lug shaping component 100 to move, so as to flatten the battery pole lug 210 and retract the outward expansion part 2101.

[0057] The flattening portion 21 of this embodiment is used to flatten the battery tab 210 on the battery cell 200, which means that the flattening portion 21 can flatten the tab body of the battery tab 210 (that is, the part of the tab except the outwardly expanded portion 2101), and can also be used to flatten the outwardly expanded portion 2101 of the battery tab 210 at the same time.

[0058] When the outward expansion portion 2101 of the battery tab 210 of the battery cell 200 being shaped only extends along one side of the thickness direction of the battery cell 200, a retracting portion 22 may be provided at one end of the flattening portion 21 of this embodiment, but this structure has great limitations and can only retract one end. Therefore, in some examples, optionally, the present embodiment provides retracting portions 22 at both opposite ends of the flattening portion 21, so that the outward expansion portion 2101 extending on one or both sides can be retracted.

[0059] In combination with the above description, it can be seen that the tab shaping assembly 100 of this embodiment designs the shaping mechanism 20 to include a flattening portion 21 and a gathering portion 22. In addition to being able to flatten and shape the battery tab 210, it is also able to shape and gather the outwardly expanded portion 2101 of the battery tab 210, thereby reducing the possibility of the outwardly expanded portion 2101 being badly bent and contacting the battery casing.

[0060] In some examples, optionally, the flattening portion 21 includes a flattening piece 211, and the gathering portion 22 includes a gathering piece 221, and at least one of the two opposite ends of the flattening piece 211 is provided with a gathering piece 221, the flattening piece 211 is provided with a flattening plane 2111 for flattening the battery tab 210, and the gathering piece 221 is provided with a gathering surface 2211 for gathering the outwardly expanded portion 2101, and the flattening plane 2111 and the gathering surface 2211 are connected at an angle.

[0061] The flattening member 211 and the gathering member 221 of this embodiment can both be in the shape of plates, strips or blocks. The flattening surface 2111 and the gathering surface 2211 of this embodiment can both be planes or approximately planes. This embodiment does not impose too many restrictions on this, as long as the flattening and gathering requirements can be met.

[0062] The flattening member 211 and the folding member 221 of this embodiment may be made of metal, plastic or other materials with certain structural strength.

[0063] In this embodiment, the flattening portion 21 is designed as a flattening piece 211, and the gathering portion 22 is designed to include a gathering piece 221, and the flattening surface 2111 of the flattening piece 211 and the gathering surface 2211 of the gathering piece 221 are used to shape the battery tab 210, thereby having a simple structure and low cost.

[0064] In some examples, optionally, the pressing surface 2111 and the gathering surface 2211 are vertically connected.

[0065] When the tab shaping assembly 100 of this embodiment is used for flattening, the pressing plane 2111 may be located on a horizontal plane, while the gathering plane 2211 of this embodiment may be located on a vertical plane. By designing the pressing plane 2111 and the gathering plane 2211 to be vertically connected, the free end of the shaped outward expansion portion 2101 can be closer to the battery tab 210 and the battery cell 200, further reducing the possibility of the outward expansion portion 2101 contacting the battery shell.

[0066] In some examples, optionally, the shaping mechanism 20 is provided with a reinforcing structure 23 at the connection between the flattening member 211 and the gathering member 221 , and the reinforcing structure 23 is connected to the flattening member 211 and the gathering member 221 , respectively.

[0067] The reinforcing structure 23 of this embodiment can be a reinforcing rib or a reinforcing rib. In some examples, the reinforcing rib or the reinforcing rib has a concave arc surface. The reinforcing structure 23 can be regarded as a part of the flattening part 211, as a part of the gathering part 221, or as a common part of the flattening part 211 and the gathering part 221. Therefore, the reinforcing structure 23 can be connected to the flattening part 211 and the gathering part 221 as a whole or formed as a whole during processing. The reinforcing structure 23 can improve the connection stability of the flattening part 211 and the gathering part 221, and reduce the possibility of unnecessary relative displacement between the two during flattening.

[0068] In some examples, optionally, the flattening member 211 and the gathering member 221 are integrally connected.

[0069] By designing the flattening member 211 and the folding member 221 to be connected as one piece, the connection stability between the two can be ensured.

[0070] Specifically, the integral connection method of the flattening member 211 and the folding member 221 of this embodiment may include welding, threaded connection, pin connection, key connection, etc., and may also include a method of forming an integrally formed structure by injection molding, hot pressing molding, etc.

[0071] Combined with Figure 3 , Attachment Figure 4 and attached Figure 5 As shown in the figure, the pole ear shaping component 100 of this embodiment can be specifically applied to square shell batteries. When used, the pole ear shaping component 100 is placed above the battery cell 200, and the flattening portion 21 of this embodiment is abutted against the battery pole ear 210, and the retracted portion 22 is abutted against the expanded portions 2101 on both sides of the battery pole ear 210. The pole ear shaping component 100 is driven to move along the length direction of the battery cell 200 by a moving component (not shown in the figure) to achieve flattening and shaping of the battery pole ear 210.

[0072] Combined with Figure 5 and attached Figure 6 As shown in , in some examples, the flattening portion 21 includes a first roller-pressed member 212, the gathering portion 22 includes a second roller-pressed member 222, at least one of the two opposite ends of the first roller-pressed member 212 is coaxially connected to the second roller-pressed member 222, the radial dimension of the second roller-pressed member 222 is greater than the radial dimension of the first roller-pressed member 212, and the first roller-pressed member 212 and the second roller-pressed member 222 can rotate around their own axes.

[0073] The first rolling member 212 may be cylindrical, and the second rolling member 222 may be cylindrical, truncated cone, etc. There are many ways to implement the first rolling member 212 and the second rolling member 222 to rotate around their own axes, such as by the shaft 25 described below, or by providing a notch along the circumferential direction on the first rolling member 212 and / or the second rolling member 222, and installing a bearing connected to the connecting mechanism 10 on the notch (this embodiment is not shown in the figure).

[0074] In this embodiment, the battery tab 210 is flattened by rolling and pressing the first rolling member 212, and the expanded portion 2101 of the battery tab 210 is retracted by rolling and pressing the second rolling member 222. The rotation of the first rolling member 212 and the second rolling member 222 only generates rolling friction with the battery tab 210 during flattening. Figure 1-5 The implementation method in can reduce the wear on the battery tab 210 during the shaping process.

[0075] In some examples, optionally, the second rolling member 222 includes a first end 2221 and a second end 2222 facing each other, the first end 2221 is connected to the first rolling member 212 , and the radial dimension of the second rolling member 222 gradually increases from the first end 2221 to the second end 2222 .

[0076] By designing the radial dimension of the second rolling member 222 to gradually increase from the first end 2221 to the second end 2222, the second rolling member 222 forms a truncated cone structure or a structure similar to a truncated cone. As the second rolling member 222 is pressed downward, the second rolling member 222 contacts the outwardly expanded portion 2101 of the battery pole lug 210, and can guide the outwardly expanded portion 2101 of the battery pole lug 210 when it is bent, thereby improving the shaping efficiency. At the same time, the second rolling member 222 has multiple positions with different radial dimensions, which can be adapted to battery pole lugs 210 of different width specifications.

[0077] In some examples, optionally, from the first end 2221 to the second end 2222 , the outer wall surface of the second rolling member 222 is a curved surface.

[0078] The curved surface means that both sides of the cross section of the second rolling member 222 of this embodiment are curved, and can be arc-shaped. By designing the outer wall surface of the second rolling member 222 as a curved surface, it has a better effect of guiding the outward expansion part 2101 to bend.

[0079] In some examples, optionally, the shaping mechanism 20 also includes an axis frame 24 and a rotating shaft 25 mounted on the axis frame 24, the axis frame 24 is connected to the connecting mechanism 10, the axial direction of the rotating shaft 25 is consistent with the axial direction of the first rolling member 212, and the first rolling member 212 and / or the second rolling member 222 are connected to the rotating shaft 25 in a manner that is rotatable around their own axial direction.

[0080] The number of the rotating shaft 25 can be one, in which case the rotating shaft 25 can directly pass through the first roller 212 and the second roller 222 of this embodiment, and both the first roller 212 and the second roller 222 can be connected to the rotating shaft 25 and can rotate on the rotating shaft 25. Alternatively, the rotating shaft 25 is connected to the first roller 212 and passes through two hollow second rollers 222, in which case the rotation of the first roller 212 on the rotating shaft 25 drives the second roller 222 to rotate. The number of the rotating shaft 25 can also be two, and the two rotating shafts 25 are respectively connected to the two second rollers 222 and are not connected to the first roller 212, in which case the rotation of the second roller 222 on the rotating shaft 25 drives the first roller 212 to rotate.

[0081] The connection between the rotating shaft 25 and the first rolling member 212 and the second rolling member 222 can be sleeved or connected through a bearing (not shown in the figure). By configuring the shaft frame 24 and the rotating shaft 25, the rotation of the first rolling member 212 and the second rolling member 222 can be facilitated. Of course, the rotating shaft 25 can also be fixedly connected to the first rolling member 212 and / or the second rolling member 222, and the rotating shaft 25 can be rotatably installed on the shaft frame 24.

[0082] In some examples, optionally, the first rolling member 212 and the second rolling member 222 are integrally connected.

[0083] Specifically, the integral connection method of the first rolled component 212 and the second rolled component 222 of this embodiment may include welding, threaded connection, pin connection, key connection and other connection methods, and may also include injection molding, hot pressing molding and other methods to form an integrally formed structure.

[0084] By designing the first rolling member 212 and the second rolling member 222 to be connected as an integral unit, the connection stability between the two can be improved, thereby improving the overall structural stability of the shaping mechanism 20.

[0085] Combined with Figure 7 and attached Figure 8As shown in the figure, the tab shaping assembly 100 of this embodiment can be specifically applied to square shell batteries. When used, the tab shaping assembly 100 is placed above the battery cell 200, and the first rolling member 212 and the second rolling member 222 of this embodiment are abutted against the battery tab 210. Specifically, the first rolling member 212 can be abutted against the main body of the battery tab 210, and the second rolling member 222 can be abutted against the outer expansion part 2101 of the battery tab 210. The tab shaping assembly 100 is driven to move along the length direction of the battery cell 200 by a moving assembly (not shown in the figure) to achieve flattening and shaping of the battery tab 210.

[0086] Combined with the attachment again Figure 1 , Attachment Figure 3 , Attachment Figure 5 and attached Figure 7 As shown in , in some examples, optionally, the connecting mechanism 10 includes a first connecting member 11 and a second connecting member 12, the first connecting member 11 is connected to the shaping mechanism 20, the second connecting member 12 is connected to the first connecting member 11, and is used to connect the moving component of the pole ear shaping device, and the second connecting member 12 is constructed to be adjustable in position on the first connecting member 11 so that the shaping mechanism 20 can be close to or away from the second connecting member 12.

[0087] The first connecting member 11 of this embodiment can be a rod-shaped member as shown in the figure, and the second rolling member 222 can be a block or a column. The connection relationship between the two can be a detachable method such as snap-on, plug-in, bolt connection, etc., so that the second connecting member 12 can be constructed to be adjustable in position on the first connecting member 11, and then the height of the shaping mechanism 20 on the shaping device can be adjusted to adapt to batteries of different specifications and sizes.

[0088] In some examples, optionally, the second connecting member 12 is provided with a plug hole 121 , and the first connecting member 11 is inserted into the plug hole 121 .

[0089] The socket 121 enables the first connector 11 and the second connector 12 to form a plug-in fit, and has a simple structure. The socket 121 and the first connector 11 can be locked by the friction between the two, and the friction can be overcome by external force to adjust the position of the two, thereby facilitating the adjustment of the height of the entire mechanism.

[0090] In some examples, optionally, the connection mechanism 10 further includes a locking member 13 , the second connection member 12 is provided with a locking hole 122 , the locking member 13 is passed through the locking hole 122 , and is used to compress the portion of the first connection member 11 located in the insertion hole 121 .

[0091] The purpose of configuring the locking member 13 is that although the above-mentioned plug-in method can achieve locking through the friction between the socket 121 and the first connecting member 11, this method is prone to the second connecting member 12 moving on the first connecting member 11 when pressed down, and as the number of adjustments increases, the friction between the first connecting member 11 and the socket 121 decreases, and it is easy to loosen after locking, and the locking effect is not good. Therefore, this embodiment is configured with a locking member 13, which can be used to lock the first connecting member 11 and the second connecting member 12 after the position is adjusted, thereby improving the connection stability between the two.

[0092] There are many ways to connect the locking member 13 and the locking hole 122, such as snap connection, interference connection, etc.

[0093] In some examples, optionally, the locking member 13 is threadedly connected to the locking hole 122 .

[0094] By designing the locking member 13 and the locking hole 122 to be threadedly connected, the first connecting member 11 and the second connecting member 12 can be locked or unlocked by screwing the locking member 13, which has a simple structure and is easy to operate.

[0095] In some examples, optionally, the pole ear shaping device also includes a moving component (not shown in the figure), which is connected to the second connecting member 12 of the connecting mechanism 10 and is used to drive the pole ear shaping component 100 to move. The moving component may include a mechanical arm, an electric rod, a gas rod and other structures installed on the frame, as long as it can drive the pole ear shaping component to move in a straight line.

[0096] Based on the above-mentioned tab shaping device, an embodiment of the present application further provides a battery production system, which includes the above-mentioned tab shaping device.

[0097] Finally, please see the attached Figure 1-4The embodiment of the present application provides a tab shaping device for shaping a battery tab 210, including a tab shaping assembly 100, the tab shaping assembly 100 including a connecting mechanism 10 and a shaping mechanism 20, the connecting mechanism 10 being used to connect the tab shaping device; the shaping mechanism 20 including a flattening portion 21 and a retracting portion 22, at least one of the two opposite ends of the flattening portion 21 being provided with the retracting portion 22, the flattening portion 21 being used to flatten the battery tab 210 and the outwardly expanded portion 2101 of the battery tab 210, the retracting portion 22 being used to retract the outwardly expanded portion 2101 toward the direction close to the tab. The flattening portion 21 includes a flattening member 211, and the folding portion 22 includes a folding member 221. The folding member 221 is provided at at least one of the two opposite ends of the flattening member 211. The flattening member 211 is provided with a flattening plane 2111 for flattening the battery tab 210, and the folding member 221 is provided with a folding surface 2211 for folding the outwardly expanded portion 2101. The flattening plane 2111 and the folding surface 2211 are connected at an angle. The flattening plane 2111 and the folding surface 2211 are connected vertically. The shaping mechanism 20 is provided with a reinforcing structure 23 at the connection between the flattening member 211 and the folding member 221, and the reinforcing structure 23 is connected to the flattening member 211 and the folding member 221, respectively. The flattening member 211 and the folding member 221 are connected as one piece; or, the flattening member 211 and the folding member 221 are an integrally formed structure. The tab shaping device further includes a moving assembly, which is connected to the connecting mechanism 10 and is used to drive the tab shaping assembly 100 to move.

[0098] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0099] 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 it. 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, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tab shaping device for shaping a battery tab, characterized in that: It includes a tab shaping assembly, which includes a connecting mechanism and a shaping mechanism installed on the connecting mechanism, the shaping mechanism includes a flattening portion and a retracting portion, at least one of the two opposite ends of the flattening portion is connected to the retracting portion, the flattening portion is used to flatten the battery tab and the outward expansion portion of the battery tab, and the retracting portion is used to retract the outward expansion portion in a direction close to the battery tab.

2. The terminal ear shaping device according to claim 1, characterized in that: The flattening portion includes a flattening piece, and the folding portion includes a folding piece. The flattening piece is connected to the connecting mechanism, and the folding piece is provided at at least one of the two opposite ends of the flattening piece. The flattening piece is provided with a flat pressing surface for flattening the battery ear, and the folding piece is provided with a folding surface for folding the expanded part, and the flat pressing surface and the folding surface are connected at an angle.

3. The terminal ear shaping device according to claim 2, characterized in that: The pressing plane and the gathering surface are vertically connected.

4. The terminal ear shaping device according to claim 3, characterized in that: The shaping mechanism is provided with a reinforcing structure at the connection between the flattening member and the gathering member, and the reinforcing structure is respectively connected to the flattening member and the gathering member.

5. The terminal ear shaping device according to claim 2, characterized in that: The flattening member and the folding member are integrally connected.

6. The terminal ear shaping device according to claim 1, characterized in that: The flattening portion includes a first roller, and the folding portion includes a second roller. At least one of the two opposite ends of the first roller is coaxially connected to the second roller, and the radial dimension of the second roller is greater than that of the first roller. The first roller and the second roller can rotate around their own axes on the connecting mechanism.

7. The terminal ear shaping device according to claim 6, characterized in that: The second rolling member comprises a first end and a second end opposite to each other, the first end is connected to the first rolling member, and the radial dimension of the second rolling member gradually increases from the first end to the second end.

8. The terminal ear shaping device according to claim 7, characterized in that: From the first end to the second end, the outer wall surface of the second rolling member is a curved surface.

9. The terminal ear shaping device according to claim 6, characterized in that: The shaping mechanism also includes an axle frame and a rotating shaft installed on the axle frame, the axle frame is connected to the connecting mechanism, the axial direction of the rotating shaft is consistent with the axial direction of the first rolling member, and the first rolling member and / or the second rolling member are connected to the rotating shaft in a manner that they can rotate around their own axial direction.

10. The terminal ear shaping device according to claim 6, characterized in that: The first rolling member and the second rolling member are integrally connected.

11. The electrode ear shaping device according to any one of claims 1 to 10, characterized in that: The connecting mechanism includes a first connecting member and a second connecting member, the first connecting member is connected to the shaping mechanism, the second connecting member is connected to the first connecting member and is used to connect the battery pole ear shaping device, and the second connecting member is constructed to be adjustable in position on the first connecting member so that the shaping mechanism can be close to or away from the second connecting member.

12. The electrode tab shaping device according to claim 11, characterized in that: The second connecting member is provided with a plug hole, and the first connecting member is plugged into the plug hole.

13. The electrode tab shaping device according to claim 12, characterized in that: The connecting mechanism also includes a locking member, the second connecting member is provided with a locking hole, the locking member is inserted into the locking hole, and is used to compress the portion of the first connecting member located in the insertion hole.

14. The electrode ear shaping device according to claim 13, characterized in that: The locking piece is threadedly connected to the locking hole.

15. The electrode tab shaping device according to any one of claims 1 to 10, characterized in that: The tab shaping device further comprises a moving component, which is connected to the connecting mechanism and is used to drive the tab shaping component to move.

16. A battery production system, characterized in that: It comprises a pole ear shaping device as described in any one of claims 1 to 15.

Images