Battery cell spin welding positioning mechanism and welding device

Abstract

The embodiment of the utility model provides a battery cell spin welding positioning mechanism and a welding device, and relates to the technical field of battery cell welding, the battery cell spin welding positioning mechanism comprises: a vertical positioning assembly, which comprises an upper clamping module and a lower clamping module, and the upper clamping module and the lower clamping module are used for clamping a battery cell and driving the battery cell to rotate by taking a first rotating shaft as an axis; and the horizontal positioning assembly comprises a first rolling piece, second rolling pieces, a second driving structure and a third driving structure, the second driving structure is used for driving the first rolling piece to move in the first direction, and the third driving structure is used for driving the two second rolling pieces to move in the first direction. According to the embodiment of the invention, the positioning precision of the battery cell is improved, and the situation that the sealing performance and the conductivity of the battery cell are influenced by welding track deviation can be effectively solved.

Description

Technical Field

[0001] This application relates to the field of battery cell welding technology, and in particular to a battery cell rotary welding positioning mechanism and welding device. Background Technology

[0002] In related technologies, during the manufacturing process of cylindrical battery cells (such as lithium-ion batteries), the battery cells are generally held by mechanical fixtures, and then a laser welding head is used to rotate around the battery cell to complete the ring welding; or the battery cell is stationary, and the laser welding head moves along the outer circumference of the battery cell to weld.

[0003] In the above welding scheme, insufficient positioning accuracy of the battery cell can easily lead to concentricity deviation and welding trajectory deviation, which greatly affects the sealing and conductivity of the battery cell. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a cell rotation welding positioning mechanism and welding device, which can improve the positioning accuracy of the cell.

[0005] An embodiment of this application provides a cell rotation welding positioning mechanism, comprising:

[0006] A vertical positioning assembly includes an upper clamping module and a lower clamping module, wherein the upper clamping module and the lower clamping module are used to clamp the battery cell and drive the battery cell to move about a first rotation axis.

[0007] A horizontal positioning assembly includes a first rolling element, a second rolling element, a second driving structure, and a third driving structure. The second driving structure is used to drive the first rolling element to move along a first direction, which is a direction perpendicular to the first rotation axis. There are two second rolling elements, which are spaced apart on one side of the first rolling element. The third driving structure is used to drive the two second rolling elements to move along the first direction.

[0008] Furthermore, the horizontal positioning component includes a first mounting bracket connected to the second drive structure, and two first rolling elements are rotatably mounted on the first mounting bracket, wherein the rotation axes of the two first rolling elements are parallel to the first rotation axis.

[0009] Furthermore, the second drive structure includes a first linear drive member and a first connecting rod, wherein the first connecting rod connects the first mounting bracket and the output end of the first linear drive member.

[0010] Furthermore, the horizontal positioning component includes a second mounting bracket, and two second rolling elements are rotatably mounted on the second mounting bracket. The third drive structure includes a second linear drive element and a second connecting rod, with the second connecting rod connecting the second mounting bracket and the output end of the second linear drive element.

[0011] Furthermore, there are multiple vertical positioning components, which are spaced apart, and the number and installation position of the horizontal positioning components correspond one-to-one with each of the vertical positioning components.

[0012] Furthermore, the upper clamping module includes a rotatable upper clamping block, and the lower clamping module includes a lower clamping block and a first driving structure. The lower clamping block and the upper clamping block are coaxially arranged along the first rotation axis. The first driving structure is used to drive the lower clamping block to move axially along the first rotation axis. The first driving structure is also used to drive the battery cell to rotate.

[0013] Furthermore, the lower clamping module includes a lower clamping drive component, which is connected to the lower clamping block and is used to drive the lower clamping block to rotate.

[0014] Furthermore, the first drive structure includes a lead screw and a first rotation drive member, the output end of the first rotation drive member being connected to the lead screw, and the lead screw being used to drive the lower clamping block to move axially along the first rotation axis.

[0015] Furthermore, the first drive structure includes a controller and a pressure sensor. The controller is electrically connected to the first rotation drive component, and the pressure sensor is used to detect the axial force of the lead screw in real time.

[0016] Furthermore, the upper clamping module includes an upper clamping drive member, which is connected to the upper clamping block and is used to drive the upper clamping block to rotate.

[0017] Another embodiment of this application discloses a welding apparatus, including the cell rotation welding positioning mechanism as described above.

[0018] As can be seen from the above technical solutions, the embodiments of this application have at least the following beneficial effects:

[0019] In the battery cell rotation welding positioning mechanism and welding device provided in this application embodiment, when clamping the battery cell, the first rolling element and the second rolling element can be brought closer to the direction of the battery cell to achieve battery cell positioning, which helps to improve the positioning accuracy of the battery cell and effectively solves the problem of welding trajectory deviation affecting the sealing and conductivity of the battery cell; at the same time, after the upper clamping module and the lower clamping module clamp the battery cell, they drive the battery cell to rotate. During welding, the welding head is kept in a fixed welding position, which can further solve the problem of welding trajectory deviation in traditional welding processes. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a cell rotation welding positioning mechanism provided in one embodiment of this application;

[0022] Figure 2 for Figure 1 A partial structural diagram.

[0023] Figure label:

[0024] 1. Battery cell;

[0025] 110. Upper clamping module; 111. Upper clamping block; 112. Upper clamping drive component; 120. Lower clamping module; 121. Lower clamping block; 122. First drive structure; 1221. Lower clamping drive component; 1222. Lead screw; 1223. First rotation drive component;

[0026] 200, Horizontal positioning assembly; 210, First rolling element; 220, Second rolling element; 230, Second drive structure; 240, Third drive structure; 241, Second connecting rod; 242, Second linear drive element; 250, First mounting bracket; 260, Second mounting bracket. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] See Figure 1 and Figure 2 As shown, one embodiment of this application discloses a cell rotation welding positioning mechanism, including a numerical positioning component and a horizontal positioning component 200.

[0029] Specifically, the vertical positioning assembly includes an upper clamping module 110 and a lower clamping module 120, which are used to clamp the battery cell 1 and drive the battery cell 1 to rotate about the first rotation axis. The horizontal positioning assembly 200 includes a first rolling element 210, a second rolling element 220, a second driving structure 230 and a third driving structure 240. The second driving structure 230 is used to drive the first rolling element 210 to move along a first direction, which is a direction perpendicular to the first rotation axis. There are two second rolling elements 220, which are spaced apart on one side of the first rolling element 210. The third driving structure 240 is used to drive the two second rolling elements 220 to move along the first direction.

[0030] Wherein, the axial direction of the first rotating shaft is... Figure 1 or Figure 2 The Y-direction shown is parallel, and the first direction is... Figure 1 or Figure 2 The X direction is shown in the diagram. It is worth understanding that movement along the first direction includes both forward movement along the X direction and reverse movement along the X direction. Figure 2 As shown, the first rolling element 210 moves in the opposite direction of the X direction, which allows the first rolling element 210 to come into contact with the outer periphery of the battery cell 1; the second rolling element 220 moves in the opposite direction of the X direction, which allows the second rolling element 220 to come into contact with the outer periphery of the battery cell 1.

[0031] It is worth mentioning that the rotation axes of the first rolling element 210 and the second rolling element 220 are both parallel to the first rotation axis.

[0032] It should be noted that the battery cell 1 in this embodiment is a cylindrical battery cell.

[0033] In practical operation, the second drive structure 230 drives the first rolling element 210 to move in the opposite direction of the X direction, so that the first rolling element 210 abuts against the battery cell 1. Simultaneously, the third drive structure 240 drives the second roller to move in the X direction, so that the second rolling element 220 abuts against the outer periphery of the battery cell 1. After the first rolling element 210 and the second rolling element 220 abut at different positions on the outer periphery of the battery cell 1, both the first rolling element 210 and the second rolling element 220 can roll, thereby causing the axial movement of the battery cell 1 until the center of the triangle formed by the first rolling element 210 and the two second rolling elements 220 coincides, thus achieving positioning. In other words, by making the first rolling element 210 and the second rolling element 220 move towards each other, the battery cell 1 can be positioned in the horizontal direction.

[0034] When the first rolling element 210 and the second rolling element 220 abut against the outer periphery of the battery cell 1, the first rolling element 210 and the second rolling element 220 are tangent to the outer periphery of the battery cell 1.

[0035] In the battery cell rotation welding positioning mechanism provided in this application embodiment, when clamping the battery cell 1, the first rolling element 210 and the second rolling element 220 can be brought closer to the direction of the battery cell 1 to achieve horizontal positioning of the battery cell 1, which helps to improve the positioning accuracy of the battery cell 1 and effectively solves the problem of welding trajectory deviation affecting the sealing and conductivity of the battery cell. At the same time, after clamping the battery cell 1, the upper clamping module 110 and the lower clamping module 120 drive the battery cell 1 to rotate. During welding, keeping the welding head in a fixed welding position and then driving the battery cell 1 to rotate can prevent the welding trajectory from deviating, further solving the problem of welding trajectory deviation in traditional welding processes.

[0036] In some embodiments of this application, the horizontal positioning component 200 includes a first mounting bracket 250, which is connected to the second drive structure 230. The first rolling element 210 includes two elements, which are rotatably mounted on the first mounting bracket 250. The rotation axes of the two first rolling elements 210 are parallel to the first rotation axis, and the first rotation axis is located at the center of the quadrilateral formed by the two first rolling elements 210 and the two second rolling elements 220. Thus, when the two first rolling elements 210 and the two second rolling elements 220 abut at different positions on the outer periphery of the circular battery cell 1, the center of the battery cell 1 can be located on the first rotation axis.

[0037] In some embodiments of this application, see Figure 2 The second drive structure 230 includes a first linear drive member and a first connecting rod. The first connecting rod connects the first mounting bracket 250 and the output end of the first linear drive member. The second linear drive member 242 drives the first connecting rod to move along the X direction, which allows the second rolling member 220 to move closer to or further away from the battery cell 1.

[0038] In one possible implementation, the first linear drive is a cylinder, with its output end connected to the first connecting rod. Alternatively, the first linear drive could be a servo motor coupled with a lead screw structure to drive the first connecting rod in linear motion.

[0039] Furthermore, the horizontal positioning component 200 includes a first slide rail and a first slider. The first slide rail extends along the X direction, and the first slider is slidably connected to the first slide rail. The first mounting bracket 250 is connected to the first slider. The first slider is driven to move along the first slide rail by the first connecting rod, thereby driving the second rolling wheel to move, which helps to improve positioning accuracy.

[0040] In some embodiments of this application, see Figure 1 and Figure 2 The horizontal positioning component 200 includes a second mounting bracket 260, and two second rolling elements 220 are rotatably mounted on the second mounting bracket 260. The third drive structure 240 includes a second linear drive element 242 and a second connecting rod 241, with the second connecting rod 241 connecting the output ends of the second mounting bracket 260 and the second linear drive element 242.

[0041] In some embodiments of this application, see Figure 1 and Figure 2 The system comprises multiple vertical positioning components spaced at intervals, with the number and installation position of the horizontal positioning components 200 corresponding one-to-one with each vertical positioning component. This allows for simultaneous positioning of different battery cells 1 at multiple workstations, improving positioning efficiency.

[0042] In one embodiment, see Figure 1 and Figure 2 There are multiple vertical positioning components and multiple horizontal positioning components 200, and the number of both is the same. The positions of the vertical positioning components and the horizontal positioning components 200 correspond one-to-one.

[0043] Further reading is available upon request. Figure 1 and Figure 2 To reduce the number of second drive structures 230 and third drive structures 240, in this embodiment, a single second drive structure 230 drives multiple first rolling elements 210 at different workstations to move along the X-direction. Specifically, the cell rotation welding positioning mechanism includes a back plate, and each horizontal positioning component 200 at different workstations includes a first mounting bracket 250, with each first mounting bracket 250 spaced apart on the back plate. Each first mounting bracket 250 has two first rolling elements 210 spaced apart. The second drive structure 230 of one horizontal positioning component 200 drives the back plate to move along the X-direction, thereby causing the first mounting brackets 250 at each workstation to move along the X-direction. Thus, a single second drive structure 230 can drive the movement of the first rolling elements 210 at multiple workstations, simplifying the structure and optimizing equipment costs.

[0044] In some embodiments of this application, see Figure 1 and Figure 2 The upper clamping module 110 includes a rotatable upper clamping block 111, and the lower clamping module 120 includes a lower clamping block 121 and a first driving structure 122. The lower clamping block 121 and the upper clamping block 111 are coaxially arranged along the first rotation axis. The first driving structure 122 is used to drive the lower clamping block 121 to move axially along the first rotation axis. The first driving structure 122 is also used to drive the battery cell 1 to rotate.

[0045] In one possible implementation, see Figure 1 and Figure 2The lower clamping module 120 includes a lower clamping drive 1221, which is connected to the lower clamping block 121. The lower clamping drive 1221 is used to drive the lower clamping block 121 to rotate.

[0046] It is understandable that the rotation axis of the lower clamping drive 1221 coincides with the first rotation axis.

[0047] In one possible implementation, see Figure 1 and Figure 2 The first drive structure 122 includes a lead screw 1222 and a first rotation drive member 1223. The output end of the first rotation drive member 1223 is connected to the lead screw 1222. The lead screw 1222 is used to drive the lower clamping block 121 to move axially along the first rotation axis, wherein the axial direction of the first rotation axis is parallel to the Y direction. Thus, the lower clamping block 121 can be driven to move in the Y direction.

[0048] Furthermore, the first drive structure 122 includes a controller and a pressure sensor. The controller is electrically connected to the first rotation drive component 1223, and the pressure sensor is used to detect the axial force of the lead screw 1222 in real time. The pressure sensor can detect the axial force on the lead screw 1222 in real time, thereby obtaining the vertical clamping force on the battery cell 1. The setting of the pressure sensor can adjust the vertical clamping force on the battery cell 1 in real time, avoiding situations such as excessive vertical clamping force leading to deformation of the battery cell 1 or insufficient vertical clamping force leading to rotational instability.

[0049] In some embodiments of this application, the upper clamping module 110 includes an upper clamping drive 112, which is connected to the upper clamping block 111. The upper clamping drive 112 is used to drive the upper clamping block 111 to rotate. In this embodiment, the rotational angular velocity of the upper clamping drive 112 is the same as the rotational angular velocity of the lower clamping drive 1221.

[0050] In some other embodiments, the upper clamping module 110 can move axially along the Y direction, and also drives the battery cell 1 to rotate; the lower clamping module 120 includes a rotatable lower clamping block 121. In practical applications, after the battery cell 1 is loaded onto the lower clamping block 121, the upper clamping module 110 moves in the opposite direction along the Y direction and clamps the battery cell 1 between the upper clamping module 110 and the lower clamping module 120, and then drives the battery cell 1 to rotate.

[0051] In some other embodiments, both the upper clamping module 110 and the lower clamping module 120 can move in the forward or reverse direction along the Y direction to clamp the battery cell 1 located between them. It is worth understanding that in this embodiment, the upper clamping module 110 can drive the battery cell 1 to rotate, the lower clamping module 120 can drive the battery cell 1 to rotate, or both the upper clamping module 110 and the lower clamping module 120 can simultaneously drive the battery cell to rotate about the first rotation axis.

[0052] The second aspect of this application discloses a welding apparatus, including the battery cell rotation welding positioning mechanism as described above, which has all the technical effects of the aforementioned battery cell rotation welding positioning mechanism, and will not be repeated here.

[0053] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A cell rotation welding and positioning mechanism, characterized in that, The application relates to a battery cell rotating and welding positioning mechanism. The vertical positioning assembly comprises an upper clamping module and a lower clamping module, which are used for clamping and rotating the battery cell around a first rotating shaft. The horizontal positioning assembly comprises a first rolling element, a second rolling element, a second driving structure and a third driving structure, wherein the second driving structure is used for driving the first rolling element to move in a first direction, the first direction is a direction perpendicular to the first rotating shaft, the second rolling element has two second rolling elements which are arranged on one side of the first rolling element, and the third driving structure is used for driving the two second rolling elements to move in the first direction.

2. The cell spin-weld positioning mechanism of claim 1, wherein, The horizontal positioning assembly comprises a first mounting frame which is connected with the second driving structure, and the first rolling element comprises two first rolling elements which are rotatably arranged on the first mounting frame, wherein the rotating shafts of the two first rolling elements are parallel to the first rotating shaft.

3. The cell spin weld positioning mechanism of claim 2, wherein, The second driving structure comprises a first linear driving element and a first connecting rod which connects the first mounting frame and the output end of the first linear driving element.

4. The cell spin welding positioning mechanism of any one of claims 1 to 3, wherein, The horizontal positioning assembly comprises a second mounting frame, and the two second rolling elements are rotatably arranged on the second mounting frame, and the third driving structure comprises a second linear driving element and a second connecting rod which connects the second mounting frame and the output end of the second linear driving element.

5. The cell spin weld positioning mechanism of claim 1, wherein, The vertical positioning assembly has a plurality of vertical positioning assemblies which are arranged at intervals, and the number and mounting positions of the horizontal positioning assemblies correspond to the vertical positioning assemblies one by one.

6. The cell spin weld positioning mechanism of claim 1, wherein, The upper clamping module comprises a rotatable upper clamping block, the lower clamping module comprises a lower clamping block and a first driving structure, the lower clamping block is coaxially arranged with the upper clamping block along the first rotating shaft, the first driving structure is used for driving the lower clamping block to move along the axial direction of the first rotating shaft, and the first driving structure is also used for driving the battery cell to rotate.

7. The cell spin weld positioning mechanism of claim 6, wherein, The first driving structure comprises a lower clamping driving element which is connected with the lower clamping block and is used for driving the lower clamping block to rotate.

8. The cell spin weld positioning mechanism of claim 7, wherein, The first driving structure comprises a lead screw and a first rotating driving element, the output end of the first rotating driving element is connected with the lead screw, and the lead screw is used for driving the lower clamping block to move along the axial direction of the first rotating shaft.

9. The cell spin weld positioning mechanism of claim 8, wherein, The first driving structure comprises a controller and a pressure sensor, the controller is electrically connected with the first rotating driving element, and the pressure sensor is used for detecting the axial force of the lead screw in real time.

10. A welding device characterized by, The application further relates to a battery cell rotating and welding positioning mechanism.

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