Welding positioning assembly and welding equipment

Abstract

The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a welding positioning assembly and welding equipment. The welding positioning assembly comprises a base, a welding bottom block and a positioning piece, the welding bottom block and the positioning piece are arranged on the base, a positioning groove is formed in the positioning piece, the positioning piece is connected with the welding bottom block through the positioning groove, and a containing area is formed in the area, not covered by the positioning piece, of the welding bottom block; a battery cell to be welded and a cover plate to be welded are placed in the placing area, and a tab of the battery cell and the cover plate can abut against the positioning piece so as to position the tab and the cover plate. The welding positioning assembly can solve the problems that in the prior art, the positioning precision of a tab and a cover plate is poor, and position deviation is prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a welding positioning component and welding equipment. Background Art

[0002] During the manufacturing process of lithium-ion batteries, the tabs and cover plates of the battery cells need to be welded together to facilitate the subsequent assembly of multiple battery cells. Most existing welding methods require manual labor to take the battery cells and cover plates under the ultrasonic welding head, and rely on visual observation to place the tabs and cover plates and complete the welding between the two.

[0003] However, the existing welding method relies on visual positioning of the tabs and cover plates, which is prone to position deviation and poor positioning accuracy, resulting in unstable welding quality between the tabs and cover plates, and prone to problems such as over-melting at the weld due to a small welding area, which in turn leads to a low product qualification rate for lithium-ion batteries. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a welding positioning assembly and a welding device to solve the problems of poor positioning accuracy and easy position deviation of the tab and the cover plate in the prior art.

[0005] The utility model discloses a welding positioning component, comprising a base, a welding bottom block arranged on the base and a positioning piece, the positioning piece is provided with a positioning groove, the positioning piece is connected to the welding bottom block through the positioning groove, and a placement area is formed on the welding bottom block in an area not covered by the positioning piece; the battery cell and the cover plate to be welded are placed in the placement area, and the pole ear of the battery cell and the cover plate can both abut against the positioning piece to position the pole ear and the cover plate.

[0006] Optionally, the welding positioning assembly further includes a locking piece, a locking hole is opened on the side wall of the positioning piece, the locking piece passes through the locking hole, and one end of the locking piece abuts against the welding bottom block to fix the position of the positioning piece.

[0007] Optionally, a connecting groove is provided on the base, and the welding bottom block is arranged in the connecting groove.

[0008] Optionally, the positioning member is adjustable in the length direction of the welding bottom block.

[0009] Optionally, the cross-section of the positioning member is U-shaped.

[0010] Optionally, the positioning member includes a positioning substrate corresponding to the welding base block, and connecting arms arranged on opposite sides of the positioning substrate, a positioning strip is arranged on the inner side of the connecting arm, and a plurality of parallel positioning grooves are arranged on opposite sides of the welding base block so that the positioning strip can be inserted into the positioning groove.

[0011] The utility model also discloses a welding device, comprising an ultrasonic welder and the above-mentioned welding positioning assembly, wherein the base is arranged on the ultrasonic welder.

[0012] Optionally, the ultrasonic welder includes a welder body, a placement platform connected to the welder body, and an ultrasonic welding head arranged on the welder body; the base is arranged on the placement platform so that the pole ear and the cover plate are located below the ultrasonic welding head.

[0013] Optionally, the ultrasonic horn includes a horn body rotatably connected to the welder body, and a plurality of welding heads arranged in a circumferential array on the horn body.

[0014] Compared with the prior art, the welding positioning assembly and welding equipment provided by the embodiments of the utility model have the following beneficial effects: the positioning piece is connected to the welding base block through the positioning groove, and the area on the welding base block not covered by the positioning piece forms a placement area; by placing the battery cell and cover plate to be welded in the placement area, and making the pole ear and cover plate of the battery cell abut against the positioning piece, the placement position of the pole ear and cover plate is positioned to reduce the position deviation of the pole ear and cover plate, improve the positioning accuracy, and then improve the welding quality between the pole ear and the cover plate, so as to improve the product qualification rate of lithium-ion batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0016] Figure 1 It is a structural schematic diagram of a welding positioning assembly provided in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 A partial enlarged schematic diagram of position A in the middle;

[0018] Figure 3 An exploded schematic diagram of a positioning member and a locking member provided in an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the structure of a base provided in an embodiment of the utility model;

[0020] Figure 5 A schematic diagram of the structure of a positioning member provided in an embodiment of the utility model;

[0021] Figure 6 A schematic diagram of the assembly of an ultrasonic welder and a welding positioning assembly provided in an embodiment of the utility model;

[0022] Figure 7 yes Figure 6 A partial enlarged schematic diagram of position B in the middle.

[0023] The reference numerals in the figures are:

[0024] 1. Welding positioning assembly; 11. Base; 111. Connecting groove; 12. Welding bottom block; 121. Placement area; 13. Positioning piece; 131. Positioning groove; 132. Locking hole; 13a. Positioning substrate; 13b. Connecting arm; 14. Locking piece; 2. Ultrasonic welder; 21. Welding machine body; 22. Placement platform; 23. Ultrasonic welding head; 231. Welding head body; 232. Welding head; 31. Ear; 32. Cover plate. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0026] like Figures 1 to 3 As shown, the utility model discloses a welding positioning assembly 1, including a base 11, a welding bottom block 12 and a positioning member 13 arranged on the base 11, a positioning groove 131 is opened on the positioning member 13, the positioning member 13 is connected to the welding bottom block 12 through the positioning groove 131, and a placement area 121 is formed on the area of ​​the welding bottom block 12 not covered by the positioning member 13; the battery cell and the cover plate 32 to be welded are placed in the placement area 121, and the pole ear 31 and the cover plate 32 of the battery cell can abut against the positioning member 13 to position the pole ear 31 and the cover plate 32.

[0027] The positioning piece 13 is connected to the welding base block 12 via a positioning groove 131, and a placement area 121 is formed on the welding base block 12 in an area not covered by the positioning piece 13; by placing the battery cell and the cover plate 32 to be welded in the placement area 121, and making the pole ear 31 and the cover plate 32 of the battery cell abut against the positioning piece 13, the placement position of the pole ear 31 and the cover plate 32 is positioned to reduce the position deviation of the pole ear 31 and the cover plate 32 and improve the positioning accuracy, thereby improving the welding quality between the pole ear 31 and the cover plate 32, so as to improve the product qualification rate of lithium-ion batteries.

[0028] Further, see Figure 1 and Figure 3The welding positioning assembly 1 also includes a locking member 14. A locking hole 132 is opened on the side wall of the positioning member 13. The locking member 14 passes through the locking hole 132, and one end of the locking member 14 abuts against the welding bottom block 12 to fix the positioning member 13 in position.

[0029] The locking member 14 mainly fixes the positioning member 13 and the welding bottom block 12 together by increasing the friction between the positioning member 13 and the welding bottom block 12, so as to avoid the relative position between the positioning member 13 and the welding bottom block 12 changing during the welding process, thereby ensuring that the relative position of the pole ear 31 and the cover plate 32 has good stability, thereby avoiding welding quality problems such as over-melting at the welding point caused by too small welding area, so as to improve the product qualification rate of lithium-ion batteries. Among them, the locking hole 132 can be a threaded hole, and the locking member 14 can be a stud, so that the threaded fit between the threaded hole and the stud promotes the reliable abutment between the stud and the welding bottom block 12, thereby ensuring the stability of the relative position relationship between the positioning member 13 and the welding bottom block 12.

[0030] Specifically, Figure 1 and Figure 4 As shown, a connection groove 111 is provided on the base 11, and the welding bottom block 12 is arranged in the connection groove 111. This arrangement can keep the relative position between the welding bottom block 12 and the base 11 stable through the limiting effect of the connection groove 111 and the friction between the inner wall of the connection groove 111 and the welding bottom block 12, thereby keeping the relative position between the welding bottom block 12 and the positioning member 13 stable, and further making the relative position of the pole ear 31 and the cover plate 32 have good stability, so as to avoid welding quality problems caused by poor position stability of the pole ear 31 and the cover plate 32, and finally improve the product qualification rate of lithium-ion batteries.

[0031] Specifically, the positioning member 13 is adjustable in the length direction of the welding base block 12. In actual production applications, the state of the positioning member 13 can be changed by loosening and tightening the locking member 14. The specific operation steps are as follows: loosen the locking member 14 to allow the positioning member 13 to move, adjust the position of the positioning member 13 in the length direction of the welding base block 12, and after the positioning member 13 moves to a suitable position, tighten the locking member 14 so that the positioning member 13 is fixed at the adjusted position. This setting method can quickly adjust the position of the positioning member 13 in the length direction of the welding base block 12 to adapt to different length specifications of the pole ear 31 or different width specifications of the cover plate 32.

[0032] Specifically, the cross section of the positioning member 13 is U-shaped. The U-shaped structure not only facilitates the movement of the positioning member 13 along the length direction of the welding base block 12, but also limits the movement of the positioning member 13 along the width direction of the welding base block 12.

[0033] In an alternative embodiment, see Figure 5The positioning member 13 includes a positioning substrate 13a corresponding to the welding base block 12, and connecting arms 13b arranged on opposite sides of the positioning substrate 13a, a positioning strip is arranged on the inner side of the connecting arm 13b, and a plurality of parallel positioning grooves are arranged on opposite sides of the welding base block 12 so that the positioning strip can be inserted into the positioning groove.

[0034] In actual production applications, positioning grooves can be set at different positions of the welding base block 12 according to actual needs, so that positioning grooves at different positions correspond to different length positions. Users can select corresponding positioning grooves according to the required placement positions of the pole ears 31 and the cover plate 32, and insert the positioning strips into the corresponding positioning grooves, so that the relative position information between the positioning plate and the welding base block 12 can be quickly obtained without measurement, and the movement of the positioning member 13 in the length and width directions is limited by the connecting arm 13b and the matching positioning strips and positioning grooves.

[0035] It should be noted that the positioning grooves and the positioning strips are arranged along the vertical direction of the length of the welding base block 12 so that the positioning grooves and the positioning strips that cooperate with each other can play a corresponding limiting role in the movement of the positioning member 13 along the length of the welding base block 12.

[0036] like Figure 6 and Figure 7 As shown, the utility model also discloses a welding device, including an ultrasonic welder 2 and the above-mentioned welding positioning assembly 1, and a base 11 is arranged on the ultrasonic welder 2. The welding positioning assembly 1 includes the structure and beneficial effects of the welding positioning assembly 1 in the aforementioned embodiment. The structure and beneficial effects of the welding positioning assembly 1 have been described in detail in the aforementioned embodiment, and will not be repeated here.

[0037] Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the two surfaces of the objects rub against each other to form a fusion between the molecular layers. Compared with conventional welding processes such as electric welding, ultrasonic welding has the advantages of low energy consumption, high strength and strength stability of the weld, and is suitable for welding a variety of combined materials. It is easy to weld materials with high thermal conductivity and high electrical conductivity (such as gold, silver, copper, aluminum, etc.), and has low requirements for the cleanliness of the surface of the welded workpiece.

[0038] Specifically, see Figure 6 and Figure 7 The ultrasonic welder 2 includes a welder body 21, a placement platform 22 connected to the welder body 21, and an ultrasonic welding head 23 arranged on the welder body 21; the base 11 is arranged on the placement platform 22 so that the pole ear 31 and the cover plate 32 are located below the ultrasonic welding head 23.

[0039] The placement platform 22 can provide a flat and stable placement space for the base 11, so that the welding bottom block 12 and the positioning member 13 arranged on the base 11 can maintain good position stability, thereby reducing the position deviation of the pole tab 31 and the cover plate 32, improving the positioning accuracy, and then improving the welding quality between the pole tab 31 and the cover plate 32, so as to improve the product qualification rate of the lithium-ion battery. The relative arrangement position between the pole tab 31, the cover plate 32 and the ultrasonic welding head 23 can facilitate the welding process of the ultrasonic welding head 23, which is conducive to improving the positioning accuracy between the pole tab 31, the cover plate 32 and the ultrasonic welding head 23, so as to improve the welding quality between the pole tab 31 and the cover plate 32.

[0040] Furthermore, the ultrasonic horn 23 includes a horn body 231 rotatably connected to the welding machine body 21, and a plurality of welding heads 232 arranged in a circumferential array on the horn body 231. In actual production applications, the welding heads 232 at different positions can be selected for welding processing by rotating the horn body 231.

[0041] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A welding positioning assembly, characterized in that: It comprises a base, a welding bottom block and a positioning piece arranged on the base, wherein the positioning piece is provided with a positioning groove, the positioning piece is connected to the welding bottom block through the positioning groove, and an area on the welding bottom block not covered by the positioning piece forms a placement area; The battery cell and the cover plate to be welded are placed in the placement area, and the pole lugs of the battery cell and the cover plate can both abut against the positioning member to position the pole lugs and the cover plate.

2. The welding positioning assembly according to claim 1, characterized in that: The welding positioning assembly also includes a locking piece. A locking hole is opened on the side wall of the positioning piece. The locking piece passes through the locking hole, and one end of the locking piece abuts against the welding bottom block to fix the position of the positioning piece.

3. The welding positioning assembly according to claim 2, characterized in that: The base is provided with a connection groove, and the welding bottom block is arranged in the connection groove.

4. The welding positioning assembly according to claim 1, characterized in that: The positioning member is adjustable in the length direction of the welding bottom block.

5. The welding positioning assembly according to claim 4, characterized in that: The cross section of the positioning piece is U-shaped.

6. The welding positioning assembly according to claim 5, characterized in that: The positioning member includes a positioning substrate corresponding to the welding base block, and connecting arms arranged on opposite sides of the positioning substrate, a positioning strip is arranged on the inner side of the connecting arm, and a plurality of parallel positioning grooves are arranged on opposite sides of the welding base block so that the positioning strip can be inserted into the positioning groove.

7. Welding equipment, characterized in that It comprises an ultrasonic welder and the welding positioning assembly according to any one of claims 1 to 6, wherein the base is arranged on the ultrasonic welder.

8. The welding device according to claim 7, characterized in that The ultrasonic welding machine comprises a welding machine body, a placement platform connected to the welding machine body, and an ultrasonic welding head arranged on the welding machine body; The base is arranged on the placement platform so that the pole lug and the cover plate are located below the ultrasonic welding head.

9. The welding device according to claim 8, characterized in that The ultrasonic horn comprises a horn body rotatably connected to the welder body, and a plurality of welding heads arranged in a circumferential array on the horn body.

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