A tab flattening device

Abstract

The present invention relates to a tab flattening device. The tab flattening device comprises a tab folding assembly, which comprises a moving seat and a plurality of tab folding plates hingedly connected to the moving seat. The plurality of tab folding plates are arranged around a preset axis, and each tab folding plate has an abutment surface. Each tab folding plate can be controlled to rotate relative to the moving seat to a first state and a second state. When the tab folding plates are in the first state, the abutment surfaces together form a combined plane. When the tab folding plates are in the second state, the ends of the abutment surfaces closest to the preset axis are inclined toward the same side of the combined plane.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing equipment, and in particular to a tab flattening device. Background Art

[0002] During the battery cell production process, tabs need to be flattened. Existing flattening mechanisms typically use a drive to continuously tap the ends of the cell, bending each tab toward the center and flattening it onto the end face. However, this method of tapping the tabs with a flat plate can easily cause the tabs to turn outward, impacting cell quality. Summary of the Invention

[0003] Based on this, it is necessary to provide a tab flattening device that improves the above-mentioned defect that the tabs are easily turned outward when the tabs are flattened using a flat plate in the existing technology, which affects the quality of the battery cell.

[0004] A tab flattening device includes a tab folding assembly, wherein the tab folding assembly includes a moving seat and a plurality of tab folding plates hinged to the moving seat, wherein the plurality of tab folding plates are arranged around a preset axis, and each tab folding plate has an abutting surface;

[0005] In which, each of the folding ear plates can be controlled to rotate relative to the moving seat to the first state and the second state; when each of the folding ear plates is in the first state, each of the abutment surfaces together forms a combined plane; when each of the folding ear plates is in the second state, each of the abutment surfaces close to the preset axis is inclined toward the same side of the combined plane.

[0006] In one embodiment, when each of the folded electrode ear plates is in the second state, one end of each of the abutting surfaces close to the preset axis is inclined in a direction away from the battery cell.

[0007] In one embodiment, each of the folding ear plates has a first end close to the preset axis, and the folding ear assembly also includes a first driving member and an abutment member. The first driving member is installed on the moving seat, and the abutment member is installed at the driving end of the first driving member. The first driving member is used to drive the abutment member to abut against the first end of each of the folding ear plates and push each of the folding ear plates to rotate from the second state to the first state.

[0008] In one embodiment, the folding ear assembly also includes a plurality of elastic reset units, all of which are installed on the moving seat. The plurality of elastic reset units are in one-to-one contact with the plurality of folding ear plates, so that each of the elastic reset units applies an elastic force to the corresponding folding ear plate, and each of the folding ear plates has a movement tendency to rotate from the first state to the second state under the action of the elastic force.

[0009] In one embodiment, each of the folding ear plates has a first end close to the preset axis and a second end away from the preset axis, the hinged position of each of the folding ear plates and the moving seat is located between the first end and the second end, and the second end of each of the folding ear plates has a first abutting portion;

[0010] Each of the elastic reset units includes an abutment rod and a reset elastic member, the abutment rod is movably connected to the moving seat, the reset elastic member abuts against the abutment rod and the moving seat to drive the abutment rod to abut against the corresponding first abutment portion, and transmits the elastic force provided by the reset elastic member to the corresponding folding ear plate.

[0011] In one embodiment, one end of each abutting rod has a second abutting portion, the first abutting portion is provided with a limiting groove, and the second abutting portion abuts against the limiting groove of the first abutting portion.

[0012] In one embodiment, the second abutting portion has a spherical surface for abutting against the first abutting portion.

[0013] In one embodiment, the folded tab assembly further includes a second driving member, the moving seat is mounted on a driving end of the second driving member, and the second driving member is used to drive the moving seat to move, so as to drive each of the folded tab plates to abut against the end surface of the battery cell through the abutting surface;

[0014] Wherein, the driving force of the second driving member is greater than the driving force of the first driving member.

[0015] In one embodiment, two folding ear assemblies are provided, and a flattening station is formed between each folding ear plate of one folding ear assembly and each folding ear plate of another folding ear assembly, which are respectively used to flatten the ears at both ends of the battery cell located at the flattening station.

[0016] In one embodiment, the tab flattening device further includes a gripping assembly, which is used to grip the battery cell and transfer the gripped battery cell to the flattening station.

[0017] When the above-mentioned pole ear flattening device is actually used, first, the battery cell to be flattened is loaded to a position opposite to the abutment surface of each folded pole ear plate. At this time, each folded pole ear plate is in the second state, that is, the end of the abutment surface on each folded pole ear plate close to the preset axis (i.e., the first end hereinafter) is inclined in the direction away from the end face of the battery cell (that is, the end of each abutment surface close to the preset axis is farther away from the end face of the battery cell, and the end of each abutment surface away from the preset axis is closer to the end face of the battery cell). Then, the battery cell is controlled to gradually approach each folded pole ear plate, so that each folded pole ear plate gradually approaches the end face of the battery cell. In this process, each pole ear on the end face of the battery cell first contacts the abutment surface on each folded pole ear plate. As each folding ear plate continues to move closer to the end face of the battery cell, due to the inclined arrangement of the abutting surfaces on each folding ear plate, each pole ear is bent toward the middle of the battery cell under the guidance of the abutting surfaces, until each folding ear plate abuts the end face of the battery cell through its own abutting surface (due to the inclined arrangement of each abutting surface, at this time there is a certain distance between the end of each abutting surface close to the preset axis and the end face of the battery cell). Then, each folding ear plate is controlled to rotate relative to the moving seat so that the end of each folding ear plate close to the preset axis gradually approaches the end face of the battery cell until the abutting surfaces on each folding ear plate are coplanar and form a combined plane. At this time, the combined plane (i.e., the abutting surfaces on each folding ear plate) is completely in contact with the end face of the battery cell to flatten each pole ear onto the end face of the battery cell.

[0018] In this way, in the pole ear flattening device of the present application, when the abutting surface on each folded pole ear plate contacts the pole ear on the end face of the battery cell, since the abutting surface on each folded pole ear plate is inclined toward the direction away from the battery cell at one end close to the preset axis (that is, each folded pole ear plate is in the second state), each pole ear is bent along the corresponding abutting surface toward the middle of the end face of the battery cell (that is, each pole ear is bent inward under the guidance of the corresponding abutting surface), effectively avoiding the phenomenon of the pole ear on the end face of the battery cell folding outward, which is beneficial to improving the quality of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of a tab flattening device in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 A schematic structural diagram of a tab folding assembly of a tab flattening device is shown;

[0021] Figure 3 for Figure 2 The front view of the folded tab assembly shown;

[0022] Figure 4 for Figure 2 A side view of the folded tab assembly shown;

[0023] Figure 5 for Figure 4 A cross-sectional view of the folded tab assembly shown;

[0024] Figure 6 for Figure 2 The assembly structure diagram of the moving seat, elastic reset unit and folding ear plate of the folding ear assembly shown;

[0025] Figure 7 for Figure 6 A cross-sectional view of the kinematic seat, elastic reset unit and folded pole ear plate is shown. DETAILED DESCRIPTION

[0026] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] See also Figures 1 to 3 As shown, an embodiment of the present invention provides a tab flattening device, including a folding tab assembly 10. The folding tab assembly 10 includes a moving seat 11 and a plurality of folding tab plates 12 that are hinged to the moving seat 11. The plurality of folding tab plates 12 are arranged around a preset axis L, and each folding tab plate 12 has an abutment surface 121. Optionally, the moving seat 11 can controllably drive the movement of each folding tab plate 12 so that each folding tab plate 12 uses its own abutment surface 121 to flatten the tabs on the end face of the battery cell A. Of course, in other embodiments, the battery cell A can also be controlled to move in a direction close to each folding tab plate 12 so that the folding tab plates 12 use their own abutment surfaces 121 to flatten the tabs on the end face of the battery cell A.

[0033] Each folding ear plate 12 can be controlled to rotate relative to the motion seat 11 to a first state and a second state (see Figure 4 or Figure 5When each folding ear plate 12 is in the first state, each abutting surface 121 is coplanar and together forms a combined plane (not shown); when each folding ear plate 12 is in the second state, the abutting surface 121 on each folding ear plate 12 close to the preset axis L (i.e., the first end 123 hereinafter) is inclined toward the same side of the above-mentioned combined plane.

[0034] When the above-mentioned pole ear flattening device is actually used, first, the battery cell A to be flattened is loaded to a position opposite to the abutment surface 121 of each folded pole ear plate 12. At this time, each folded pole ear plate 12 is in the second state, that is, the end of the abutment surface 121 on each folded pole ear plate 12 close to the preset axis L (that is, the first end 123 hereinafter) is inclined in the direction away from the end face of the battery cell A (that is, the end of each abutment surface 121 close to the preset axis L is farther away from the end face of the battery cell A, and the end of each abutment surface 121 away from the preset axis L is closer to the end face of the battery cell A). Then, the battery cell A is controlled to gradually approach each folded pole ear plate 12, so that each folded pole ear plate 12 gradually approaches the end face of the battery cell A. In this process, each pole ear on the end face of the battery cell A first contacts the abutment surface 121 on each folded pole ear plate 12. As each folding ear plate 12 continues to move closer to the end face of the battery cell A, since the abutting surfaces 121 on each folding ear plate 12 are tilted, each pole ear is bent toward the middle of the battery cell A under the guidance of the abutting surface 121, until each folding ear plate 12 abuts against the end face of the battery cell A through its own abutting surface 121 (since each abutting surface 121 is tilted, at this time there is a certain distance between the end of each abutting surface 121 close to the preset axis L and the end face of the battery cell A). Then, each folding ear plate 12 is controlled to rotate relative to the moving seat 11, so that the end of each folding ear plate 12 close to the preset axis L gradually approaches the end face of the battery cell A, until the abutting surfaces 121 on each folding ear plate 12 are coplanar and form a combined plane. At this time, the combined plane (i.e., the abutting surfaces 121 on each folding ear plate 12) is completely in contact with the end face of the battery cell A, so as to flatten each pole ear onto the end face of the battery cell A.

[0035] In this way, when the abutting surface 121 on each folded pole ear plate 12 contacts the pole ear on the end face of the battery cell A, the pole ear flattening device of the present application, because the abutting surface 121 on each folded pole ear plate 12 is close to the end of the preset axis L and is tilted away from the battery cell A (that is, each folded pole ear plate 12 is in the second state), thereby making each pole ear bend along the corresponding abutting surface 121 toward the middle of the end face of the battery cell A (that is, each pole ear bends inward under the guidance of the corresponding abutting surface 121), effectively avoiding the phenomenon of the pole ear on the end face of the battery cell A folding outward, which is beneficial to improving the quality of the battery cell A.

[0036] It should be noted that when each folded pole ear plate 12 is in the second state, the entire abutment surface 121 of each folded pole ear plate 12 is inclined relative to the end face of the battery cell A. On the one hand, each abutment surface 121 can guide the pole ears from the outer edge of the end face of the battery cell A to the middle position, that is, it ensures that the bending of each pole ear is guided and that each pole ear will not be turned outward; on the other hand, for battery cells A with larger or smaller diameters, the abutment surface 121 on each folded pole ear plate 12 can also achieve the flattening of its pole ears, as long as the end face diameter of the battery cell A is less than or equal to the diameter of the above-mentioned combined plane, which is conducive to improving the compatibility of the pole ear flattening device with the battery cell specifications.

[0037] See Figure 4 and Figure 5 As shown, in the embodiment of the present application, each folding tab 12 has a first end 123 close to the preset axis L and a second end 125 away from the preset axis L. The hinge position of each folding tab 12 and the moving seat 11 is located between the first end 123 and the second end 125.

[0038] The folding tab assembly 10 further includes a first driving member 13 and an abutting member 14. The first driving member 13 is mounted on the moving seat 11, and the abutting member 14 is mounted at the driving end of the first driving member 13. The first driving member 13 is used to drive the abutting member 14 to abut against the first end 123 of each folding tab plate 12, thereby pushing each folding tab plate 12 to rotate from the second state to the first state. In this way, when it is necessary to rotate each folding ear plate 12 to the first state, the first driving member 13 drives the abutment member 14 to move toward the first end 123 of each folding ear plate 12, so that the abutment member 14 abuts against the first end 123 of each folding ear plate 12, and pushes the first end 123 of each folding ear plate 12 to rotate toward the end face of the battery cell A until the abutment surfaces 121 on each folding ear plate 12 are coplanar to form the above-mentioned combined plane. At this time, the combined plane (that is, each abutment surface 121) is fully fitted with the end face of the battery cell A to flatten each battery cell A onto the end face of the battery cell A.

[0039] Specifically, in the embodiment, the folding tab assembly 10 further includes a plurality of elastic reset units 15, each mounted on the moving seat 11. The plurality of elastic reset units 15 abut against the plurality of folding tab plates 12 in a one-to-one correspondence, such that each elastic reset unit 15 applies an elastic force to the corresponding folding tab plate 12. Under the action of the elastic force, each folding tab plate 12 has a tendency to rotate from a first state to a second state.

[0040] In this way, when it is necessary to control each folding ear plate 12 to rotate to the second state, the first driving member 13 drives the abutment 14 to separate from the first end 123 of each folding ear plate 12. At this time, under the elastic force provided by each elastic reset unit 15, the first end 123 of each folding ear plate 12 rotates in the direction away from the battery cell A and switches to the second state. When it is necessary to control each folding ear plate 12 to rotate to the first state, the first driving member 13 drives the abutment 14 to move toward the first end 123 of each folding ear plate 12, so that the abutment 14 abuts against the first end 123 of each folding ear plate 12 and pushes the first end 123 of each folding ear plate 12 to rotate toward the end face of the battery cell A (at this time, each folding ear plate 12 overcomes the elastic force provided by the elastic reset unit 15 and rotates) until the abutment surfaces 121 on each folding ear plate 12 are coplanar and form the above-mentioned combined plane. At this time, each folding ear plate 12 is in the first state.

[0041] That is, each elastic reset unit 15 provides power to each folding ear plate 12 to rotate from the first state to the second state. The first driving member 13 provides power to each folding ear plate 12 to rotate from the second state to the first state.

[0042] See Figure 6 and Figure 7 As shown, in the embodiment, the second end 125 of each folding pole lug 12 has a first abutment portion 127, and each elastic reset unit 15 includes an abutment rod 151 and a reset elastic member 152. The abutment rod 151 is movably connected to the moving seat 11, that is, the abutment rod 151 can move a certain distance relative to the moving seat 11. The reset elastic member 152 abuts the abutment rod 151 and the moving seat 11, driving the abutment rod 151 to abut the corresponding first abutment portion 127 and transmitting the elastic force provided by the reset elastic member 152 to the corresponding folding pole lug 12, causing the folding pole lug 12 to have a movement tendency to rotate from the first state to the second state. In this way, under the action of the reset elastic member 152, the abutment rod 151 and the first abutment portion 127 of the corresponding folding pole lug 12 always maintain abutment, ensuring that when the first driving member 13 is not providing power, each folding pole lug 12 can remain in the second state under the elastic force provided by the corresponding reset elastic member 152.

[0043] Furthermore, each abutting rod 151 has a second abutting portion 1510 at one end, and the first abutting portion 127 defines a limiting groove 1271. The second abutting portion 1510 abuts against the limiting groove 1271 of the first abutting portion 127. Thus, the limiting groove 1271 limits the second abutting portion 1510 of the abutting rod 151, preventing the second abutting portion 1510 of the abutting rod 151 from separating from the first abutting portion 127 of the folding lug plate 12 during rotation.

[0044] Furthermore, the second abutting portion 1510 has a spherical surface 1512 for abutting against the first abutting portion 127, thereby avoiding jamming between the second abutting portion 1510 and the first abutting portion 127 during the rotation of the folding ear plate 12, ensuring that the folding ear plate 12 rotates more smoothly relative to the moving seat 11.

[0045] Furthermore, the reset elastic member 152 is sleeved outside the abutting rod 151, one end of the reset elastic member 152 abuts against the second abutting portion 1510, and the other end of the reset elastic member 152 abuts against the moving seat 11. Optionally, the reset elastic member 152 can be a spring.

[0046] Please continue to see Figure 4 and Figure 5 As shown, specifically in the embodiment, the folding lug assembly 10 further includes a second driving member 16 and a mounting base 17. The second driving member 16 is mounted on the mounting base 17, and the above-mentioned moving seat 11 is mounted on the driving end of the second driving member 16. The second driving member 16 is used to drive the moving seat 11 to approach or move away from the battery cell A, so as to drive each folding lug plate 12 to approach or move away from the battery cell A through the moving seat 11, so that the abutting surface 121 of each folding lug plate 12 abuts or separates with the end surface of the battery cell A. Optionally, the second driving member 16 can be a cylinder.

[0047] Furthermore, the driving force of the second driving member 16 is greater than the driving force of the first driving member 13, so that when each folded pole ear plate 12 abuts against the end face of the battery cell A, it can avoid the phenomenon that the moving seat 11 overcomes the driving force provided by the second driving member 16 and retreats due to the excessive driving force provided by the first driving member 13, and ensure that the abutting surface 121 of each folded pole ear plate 12 can flatten the pole ear onto the end face of the battery cell A.

[0048] See Figure 1 As shown, in an embodiment of the present application, two folding pole ear assemblies 10 are provided. A flattening station B is formed between each folding pole ear plate 12 of one folding pole ear assembly 10 and each folding pole ear plate 12 of another folding pole ear assembly 10, that is, the flattening station B is located between the two folding pole ear assemblies 10. The two folding pole ear assemblies 10 are respectively used to flatten the pole ears at both ends of the battery cell A located at the flattening station B. In this way, when performing the flattening operation, the battery cell A is first transferred to the flattening station B so that the two ends of the battery cell A are respectively facing the two folding pole ear assemblies 10; then, the two folding pole ear assemblies 10 are used to flatten the pole ears at both ends of the battery cell A.

[0049] Specifically in the embodiment, the tab flattening device also includes a conveyor line 30 and a grabbing assembly 20. The conveyor line 30 is used to convey the battery cell A. The grabbing assembly 20 is used to grab the battery cell A on the conveyor line 30 and transfer the grabbed battery cell A to the above-mentioned flattening station B. After the two tab folding assemblies 10 flatten the tabs at both ends of the battery cell A, the grabbing assembly 20 transfers the battery cell A to the conveyor line 30. It should be noted that the specific structure of the conveyor line 30 and the grabbing assembly 20 can adopt relatively mature existing technologies and are not limited here.

[0050] The following combination Figure 1 The operation process of the tab flattening device is described as follows:

[0051] For the convenience of description, the two folded pole tab assemblies 10 are respectively referred to as the left folded pole tab assembly 10 and the right folded pole tab assembly 10 according to their positional relationship.

[0052] First, the conveyor line 30 conveys the battery cell A to be flattened to the bottom of the grab assembly 20. Then, the grab assembly 20 descends and grabs the battery cell A, and then drives the battery cell A to rise to the flattening station B between the left folding tab assembly 10 and the right folding tab assembly 10, so that the left end face of the battery cell A faces the abutment surfaces 121 of each folding tab plate 12 of the left folding tab assembly 10, and the right end face of the battery cell A faces the abutment surfaces 121 of each folding tab plate 12 of the right folding tab assembly 10.

[0053] Then, for the left folded tab assembly 10: the second driving member 16 drives each folded tab plate 12 to move rightward via the moving seat 11 (at this time, each folded tab plate 12 is in the second state) until the abutting surface 121 of each folded tab plate 12 abuts the left end face of the battery cell A. During this process, each tab on the left end face of the battery cell A is gradually bent toward the middle of the left end face of the battery cell A under the guidance of the abutting surface 121 in contact with it.

[0054] For the right-side folded tab assembly 10: the second driving member 16 drives each folded tab plate 12 to move leftward via the moving seat 11 (at this time, each folded tab plate 12 is in the second state) until the abutting surface 121 of each folded tab plate 12 abuts the right end face of the battery cell A. During this process, each tab on the right end face of the battery cell A is guided by the abutting surface 121 and is bent toward the middle of the right end face of the battery cell A.

[0055] Then, for the left folding pole ear assembly 10: the first driving member 13 drives the abutting member 14 to move rightward, so that the abutting member 14 abuts against the first end 123 of each folding pole ear plate 12, and pushes the first end 123 of each folding pole ear plate 12 to rotate rightward, until the abutting surfaces 121 are in the same plane and form a combined plane (in this process, the reset elastic member 152 is further compressed), that is, the folding pole ear plates 12 are in the first state. At this time, the combined plane (that is, each abutting surface 121) is completely in contact with the left end face of the battery cell A to flatten the pole ears on the left end face of the battery cell A.

[0056] For the right folding tab assembly 10: the first driving member 13 drives the abutting member 14 to move leftward, so that the abutting member 14 abuts against the first end 123 of each folding tab plate 12, and pushes the first end 123 of each folding tab plate 12 to rotate leftward until the abutting surfaces 121 are in the same plane to form a combined plane, that is, the folding tab plates 12 are in the first state. At this time, the combined plane (that is, the abutting surfaces 121) is in contact with the right end surface of the battery cell A to flatten the tabs on the right end surface of the battery cell A.

[0057] Finally, regarding the left-side folding tab assembly 10: the second driving member 16 drives each folding tab plate 12 to move leftward via the moving seat 11, separating each folding tab plate 12 from the left end face of the battery cell A. The first driving member 13 drives the abutting member 14 to move leftward, separating the abutting member 14 from the first end 123 of each folding tab plate 12. At this time, under the elastic force provided by the reset elastic member 152, the first end 123 of each folding tab plate 12 rotates to the left by a certain angle, placing each folding tab plate 12 in the second state.

[0058] For the right-side folding tab assembly 10: the second driving member 16 drives each folding tab plate 12 to move rightward via the moving seat 11, separating each folding tab plate 12 from the right end surface of the battery cell A. The first driving member 13 drives the abutting member 14 to move rightward, separating the abutting member 14 from the first end 123 of each folding tab plate 12. At this time, under the elastic force provided by the reset elastic member 152, the first end 123 of each folding tab plate 12 rotates to the right by a certain angle, placing each folding tab plate 12 in the second state.

[0059] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A tab flattening device, characterized in that: The folding pole ear assembly includes a moving seat and a plurality of folding pole ear plates hinged to the moving seat; the plurality of folding pole ear plates are arranged around a preset axis, and each of the folding pole ear plates has an abutting surface; Wherein, each of the folding ear plates can be controlled to rotate relative to the moving seat to a first state and a second state; when each of the folding ear plates is in the first state, each of the abutting surfaces together forms a combined plane; when each of the folding ear plates is in the second state, each of the abutting surfaces, one end close to the preset axis, is inclined toward the same side of the combined plane; Each of the folding pole ear plates has a first end close to the preset axis and a second end away from the preset axis. The folding pole ear assembly further includes a first driving member and an abutting member. The first driving member is mounted on the moving seat, and the abutting member is mounted on the driving end of the first driving member. The first driving member is used to drive the abutting member to abut against the first end of each of the folding pole ear plates and push each of the folding pole ear plates to rotate from the second state to the first state. The folding pole ear assembly further includes a plurality of elastic reset units mounted on the moving seat, the plurality of elastic reset units correspondingly abutting against the plurality of folding pole ear plates, so that each elastic reset unit applies an elastic force to the corresponding folding pole ear plate, and each folding pole ear plate has a movement tendency to rotate from the first state to the second state under the action of the elastic force; The hinged position of each folding pole ear plate and the moving seat is located between the first end and the second end, and the second end of each folding pole ear plate has a first abutment portion; each elastic reset unit includes an abutment rod and a reset elastic member, the abutment rod is movably connected to the moving seat, and the reset elastic member abuts against the abutment rod and the moving seat to drive the abutment rod to abut against the corresponding first abutment portion, and transmits the elastic force provided by the reset elastic member to the corresponding folding pole ear plate; The tab flattening device also includes a conveying line.

2. The tab flattening device according to claim 1, characterized in that: When each of the folded electrode lug plates is in the second state, one end of each of the abutting surfaces close to the preset axis is inclined in a direction away from the battery cell.

3. The tab flattening device according to claim 1, characterized in that: One end of each abutting rod has a second abutting portion, the first abutting portion is provided with a limiting groove, and the second abutting portion abuts against the limiting groove of the first abutting portion.

4. The tab flattening device according to claim 3, characterized in that: The second abutting portion has a spherical surface for abutting against the first abutting portion.

5. The tab flattening device according to claim 1, characterized in that: The folded tab assembly further includes a second driving member, the moving seat is mounted on a driving end of the second driving member, and the second driving member is used to drive the moving seat to move, so as to drive each of the folded tab plates to abut against the end surface of the battery cell through the abutting surface; Wherein, the driving force of the second driving member is greater than the driving force of the first driving member.

6. The tab flattening device according to claim 1, characterized in that: There are two folding ear assemblies, and a flattening station is formed between each folding ear plate of one folding ear assembly and each folding ear plate of the other folding ear assembly, which are used to flatten the ears at both ends of the battery cell located at the flattening station.

7. The tab flattening device according to claim 6, characterized in that: The tab flattening device further includes a grabbing assembly, which is used to grab the battery cell and transfer the grabbed battery cell to the flattening station.

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