Welding dust collection device and clamping jaw thereof

Abstract

The welding dust collection device comprises a negative pressure source, a driving piece and a clamping assembly, a clamping mechanism comprises the two clamping jaws which are symmetrically arranged, each clamping jaw is provided with a clamping part and a connecting part, each clamping part is further provided with a first part and a second part, a dust collection pipe is arranged on the inner side wall of each first part, a dust outlet pipe is arranged on the opposite outer side wall of each first part, and the dust collection pipes are connected with the connecting parts. A connecting cavity communicated with the dust suction pipe and the dust outlet pipe is further formed in the first part; the two symmetrically-arranged clamping jaws abut against each other under driving of the driving piece, the first part and the second part form a first cavity and a second cavity correspondingly, the second cavity is in interference fit with a battery cell to clamp the battery cell, the welding position is located in the first cavity, and during welding, the negative pressure source is connected with the clamping jaws at the dust outlet pipe, so that the welding efficiency is improved. And then the battery cover plate covers the top of the first cavity for welding, welding slag and heat generated in the welding process can be taken out of the first cavity in time through the negative pressure source, and the effects of protecting the battery cell and accelerating cooling of the welding position are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of welding, especially to a welding dust collection device and its clamping jaw. BACKGROUND

[0002] In the production process of lithium batteries, the control of foreign matters such as metal particles and dust is a key link in the production process, which directly affects the performance and safety of the battery. The existing multi-tab cylindrical battery cell, referring to the attached Figure 1 , the attached Figure 1 is the battery cell 1 mentioned in the present application, the end of the battery cell 1 is provided with a tab 11, and the inside is provided with a core rod 12. When welding, the tab 11 needs to be bent, and then the battery cover plate 6 is placed on the bent tab 11 and part of the battery cell 1. The negative tab is welded with the cover plate by resistance welding process. The existing multi-tab cylindrical battery cell has 16 or 20 layers of tabs, which means that the number of welding workpieces is large, and the more workpieces, the more difficult to control the welding process. At the same time, when resistance welding is used, it is easy to produce spatter (waste) during the welding process. Because of the principle of welding, the instantaneous current impact causes different degrees of spatter (waste), which will fall into the battery cell, and even burn the diaphragm, directly affecting the electrochemical performance and safety of the battery.

[0003] In the current production process, the main solution to prevent dust and foreign matter from falling into the battery cell is protection, such as placing Teflon and high-temperature adhesive tape above the battery cell to prevent dust generated during welding from falling into the battery cell.

[0004] However, the above-mentioned method still has the problems of poor protection effect and complicated operation. INVENTION CONTENTS

[0005] The purpose of the present utility model is to solve the problem of damage to the battery cell caused by spatter during welding of the tab, and to provide a welding device and its clamping jaw.

[0006] A clamping jaw has a driving connection part for connecting a driver and a clamping part for clamping a battery cell. The inner side of the clamping part has a first part and a second part. The first part is provided with a connecting cavity inside. A first groove is formed on the inner side surface of the first part. A dust suction pipe is formed in the first groove and communicates with the connecting cavity. A dust outlet pipe is formed on the outer side wall of the first part and communicates with the connecting cavity.

[0007] By adopting the above technical scheme, the spatter generated during welding can enter the connecting cavity through the dust suction pipe in the first groove, and then pass from the connecting cavity to the outer side of the first part through the dust outlet pipe, thereby avoiding the damage to the battery cell caused by the spatter falling into the battery cell, and achieving the effect of protecting the battery cell and the welding position.

[0008] Preferably, the dust suction pipe is at least two and is evenly distributed inside the first groove.

[0009] Setting up multiple suction pipes improves the removal of welding slag and also accelerates heat dissipation from the welding area, thus improving the welding effect.

[0010] Furthermore, the top of the first part has a chamfer.

[0011] During the welding process, the cover plate needs to be placed on top of the tab. The chamfer serves as a guide for the battery cover plate, preventing poor welding results caused by the battery cover plate not being in the correct position during welding.

[0012] Furthermore, the diameter of the second part is smaller than that of the first part.

[0013] The second part acts as a clamp for the battery cell, ensuring its stability during the welding process.

[0014] Furthermore, the inner end of the dust outlet pipe near the outer wall has threads.

[0015] When connected to an external negative pressure source, it can achieve a certain sealing effect to prevent welding slag from leaking out; at the same time, it also ensures the structural strength of the connection between the negative pressure source and the gripper.

[0016] Furthermore, the connecting part has a recess, and a second groove is vertically formed at the end of the connecting part, with a plurality of through holes formed inside the second groove.

[0017] The recessed part of the connecting part reduces the width of the connecting part and improves the versatility of the gripper; the vertically arranged second groove and several through holes also ensure that the gripper will not rotate relative to the drive component after installation.

[0018] A welding dust extraction device is used to promptly clean welding slag during the welding process of a cover plate and a battery cell tab. It includes a negative pressure source, a driving component, and a clamping assembly. The clamping assembly includes the aforementioned grippers. The driving component and the grippers are connected by bolts through a through hole. The negative pressure source is sealed to the outer wall of the grippers through an air pipe.

[0019] By adopting the above technical solution, the welding slag generated during the welding process is discharged from the inside of the clamp to the outside of the clamp in a timely and rapid manner under the drive of the negative pressure source. This improves the protection of the battery cell during the welding process and also rapidly cools down the welding position, thereby improving the welding effect.

[0020] Furthermore, there are two grippers, and the two grippers are mirror images of each other. When the grippers are pressed together, the first part of the gripper forms a first cavity, and the second part of the two grippers forms a second cavity. The diameter of the second cavity is smaller than that of the first cavity, and it is interference-fitted with the battery cell.

[0021] The second cavity, formed by the relatively tight clamping claws, is interference-fitted with the battery cell, serving to hold it and ensure the stability of the battery cell during welding. The welding position of the battery cell tab and the battery cover is located inside the first cavity. The battery cover provides a certain degree of sealing to the top of the first cavity, ensuring that welding slag does not splash out from the top of the first cavity and also preventing external dust from entering the first cavity and causing contamination. The top of the first part of the relatively tight clamping claws has a chamfer, which guides the battery cover and ensures accurate welding position.

[0022] Furthermore, the end of the air tube connected to the gripper is provided with an external thread that mates with the internal thread.

[0023] The air tube is connected to the gripper via threads, which improves the structural strength and sealing of the connection, and enhances the dust collection and heat dissipation efficiency of the first cavity.

[0024] Furthermore, the driving component includes a cylinder, and a slider that moves horizontally is slidably disposed on the top of the cylinder. The slider is connected to the connecting part of the gripper by bolts.

[0025] This application has at least one of the following beneficial effects:

[0026] 1. The clamping jaws clamp together to form a first cavity and a second cavity. The dust suction pipe and dust discharge pipe on the first part of the clamping jaws, as well as the connecting cavity connecting the two, provide timely and efficient dust removal and heat dissipation for the welding position contained in the first cavity. The groove on the first part cooperates with the groove to accommodate the welding slag generated, which protects the battery cell and accelerates the cooling of the welding position, thus improving the welding effect.

[0027] 2. The chamfer set at the top of the first part serves as a guide for the battery cover, ensuring the accuracy of the welding position. During the welding process, the battery cover covers the top of the first cavity, separating the first cavity from the outside, preventing welding slag generated during welding from splashing out to the outside, and also preventing external contaminants from entering the first cavity and causing pollution to the internal space.

[0028] 3. The second cavity clamps the battery cell by interfering with it, which ensures the stability of the battery cell during the welding process and ensures the accuracy and speed of the welding process.

[0029] 4. The connecting part of the gripper has a recess, which reduces the width of the connecting part and improves the versatility of the gripper. The vertically set second groove and several through holes ensure that the gripper will not rotate relative to each other after installation. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the battery cell of this utility model;

[0031] Figure 2 This is a schematic diagram of the inner side of the gripper of this utility model;

[0032] Figure 3 This is a schematic diagram of the outer side of the gripper of this utility model;

[0033] Figure 4 This is a top sectional view of the gripper of this utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the welding dust collection device of this utility model;

[0035] Figure 6 This is a schematic diagram of the installation structure of the gripper and the driving component of this utility model;

[0036] Figure 7 This is a schematic diagram of the present invention in its working state.

[0037] Reference numerals: 1. Battery cell; 11. Tab; 12. Core rod; 2. Clamping claw; 21. Connecting part; 211. Through hole; 212. Recess; 213. Second groove; 22. Clamping part; 221. First part; 222. Connecting cavity; 223. Dust suction pipe; 224. First groove; 225. Dust outlet pipe; 226. Second part; 227. Chamfer; 228. Internal thread; 3. Negative pressure source; 31. Air pipe; 32. External thread; 4. First cavity; 5. Second cavity; 6. Driving component; 61. Cylinder; 62. Slider; 7. Electrode; 8. Battery cover. Detailed Implementation

[0038] To make the technical solution of the present invention clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] Reference Appendix Figure 1 , attached Figure 1 The battery cell 1 mentioned in this application has a tab 11 at one end and a core rod 12 inside, which is combined with the attached... Figure 7 During welding, the tab 11 needs to be bent, and then the battery cover 6 is placed on the part where the bent tab 11 and the cell 1 are connected.

[0041] Reference Appendix Figure 2 A gripper 2 has a connecting part 21 and a clamping part 22. The connecting part 21 has a recess 212 at both the top and bottom. A second groove 213 is vertically formed on the inner side of the end of the connecting part 21 of the gripper 2. A plurality of through holes 211 are uniformly formed in the second groove 213.

[0042] Please refer to the attached document again. Figure 2The gripping portion 22 of the gripper 2 has a first portion 221 at the top and a second portion 226 at the bottom. The diameter of the second portion 226 is smaller than that of the first portion 221. A first groove 224 is formed inside the first portion 221, and at least one suction tube 223 is formed in the first groove 224; combined with the attached... Figure 3 A dust outlet pipe 225 is provided on the outer wall of the gripper 2, and an internal thread 228 is provided on the inner side of the dust outlet pipe 225; combined with the attached Figure 4 The inner side of the first part of the gripper 2 is also provided with a connecting cavity 222 that connects the suction pipe 223 and the dust outlet pipe 225.

[0043] In this embodiment, there are three suction tubes 223, which are evenly distributed in the first groove 224 of the gripper 2, and all of them are connected to the connecting cavity 222.

[0044] Combined with appendix Figure 2 , 3 The first part 221 at the top of the gripper 2 has a chamfer 227 at its top edge.

[0045] Please refer to the attached document again. Figure 2 , 4 The inner side of the connecting part of the gripper 2 has a recess 212.

[0046] Reference Appendix Figure 5 A welding dust extraction device includes a negative pressure source 3, a driving component 6, and a clamping assembly, combined with an attached... Figure 6 The driving component 6 is a cylinder 61, and a slider 62 is slidably provided on the top of the cylinder 61. The slider 62 can move horizontally along the top of the cylinder 61. The gripper 2 mentioned above inserts the slider 62 into the second groove 213 and then fixes it to the through hole 211 of the gripper 2 by bolts. The slider 62 drives the gripper 2 to achieve the movement process of moving away from each other or moving closer to each other until they are pressed together.

[0047] Please refer to the attached document again. Figure 6 After the grippers 2 are pressed together, the first part 221 and the second part 226 of the grippers 2 respectively form the first cavity 4 and the second cavity 5.

[0048] Please refer to the attached document again. Figure 5 The negative pressure source 3 is connected to the dust outlet internal thread 228 on the outside of the clamp 2 via the external thread 32 on the air pipe 31, thus completing the overall installation of the equipment.

[0049] Reference Appendix Figure 5 At the start of the workflow, when the negative pressure source 3 is turned on, the cylinder 61 drives the slider 62 to open the mutually abutting grippers 2, combined with... Figure 2 The operator places the top of cell 1 tightly against the second part 226 of gripper 2 and aligns the end face of cell 1 with the height of the second part 226. Then, cylinder 61 drives slider 62 until grippers 2 are firmly pressed together. (Refer to attached diagram.) Figure 7At this point, the battery cover plate 8 is placed over the bent tab 11, and the electrode 7 is used to press the battery cover plate 8, tab 11, and core rod 12 together in sequence. Then, resistance welding is performed, and the attachment is combined. Figure 2 , 6 At this time, the welding slag produced by welding splashes in the first cavity 4. However, due to the action of the battery cover plate 8, the welding slag will not splash out of the gripper 2 from the top of the first cavity 4, but will accumulate in the first groove 224. At this time, the negative pressure source 3 will discharge the welding slag and the temperature generated by welding in the first cavity 4 through the dust suction pipe 223, the connecting cavity 222 and the dust outlet pipe 225 to the outside of the first cavity 4. Finally, after the above process is completed, the cylinder 61 drives the slider 62 to open the gripper 2, and the operator replaces the battery cell 1 to carry out the next welding process.

[0050] After the entire welding process is completed, the first groove 224 inside the gripper 2 is cleaned, the negative pressure source 3 is turned off, and then the grippers 2 are driven to move closer to each other until they are pressed together.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A gripper having a connection portion for connecting a driver and a gripping portion for gripping a battery cell, characterized in that, The clamping part has a first part at the top and a second part at the bottom. The first part has a connecting cavity, and a first groove is formed on the inner side of the first part. A suction pipe communicating with the connecting cavity is formed in the first groove, and a dust outlet pipe communicating with the connecting cavity is formed on the outer side wall of the first part.

2. A gripper according to claim 1, characterized in that, The top of the first part has a chamfer.

3. A gripper according to claim 1, characterized in that, The diameter of the second part is smaller than that of the first part.

4. A gripper according to claim 1, characterized in that, The dust outlet pipe has an internal thread at one end near the outer wall.

5. A gripper according to claim 1, characterized in that, The connecting part has a recess, and a second groove is vertically formed at the end of the connecting part. A plurality of through holes are uniformly formed inside the second groove.

6. A welding dust extraction device for timely cleaning of welding slag during the welding process of a cover plate and a battery cell tab, characterized in that, It includes a negative pressure source, a driving component, and a clamping assembly. The clamping assembly includes a gripper as described in any one of claims 1-5. The driving component and the gripper are connected by a bolt through a connecting hole. The negative pressure source is connected to the suction pipe of the gripper through an air pipe.

7. A welding dust extraction device according to claim 6, characterized in that, The gripper consists of two grippers, which are mirror images of each other. When the grippers are pressed together, the first part of the gripper forms a first cavity, and the second part of the two grippers forms a second cavity. The diameter of the second cavity is smaller than that of the first cavity.

8. A welding dust extraction device according to claim 7, characterized in that, The end of the air tube that connects to the gripper is provided with an external thread that mates with the internal thread.

9. A welding dust extraction device according to claim 6, characterized in that, The driving component includes a cylinder, and a slider that moves horizontally is slidably disposed on the top of the cylinder. The slider is connected to the mounting part of the gripper by bolts.

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