Battery cell and connecting piece welding positioning device

Abstract

The utility model discloses a battery cell and connecting piece welding positioning device which comprises a tool bottom plate, a battery cell width positioning piece is arranged on the top of the tool bottom plate in the length direction, and a battery cell length positioning piece is arranged on one side of the top of the tool bottom plate in the width direction. A movable positioning plate is arranged on the other side of the top of the tool bottom plate in the width direction, and a connecting piece positioning mechanism is detachably installed on the top of the movable positioning plate. The tool bottom plate, the battery cell width positioning piece and the battery cell length positioning piece are matched to realize free adjustment in the battery cell width direction and the battery cell length direction, and meanwhile, the movable positioning plate and the connecting piece positioning mechanism are matched to realize free adjustment of the relative position of the aluminum connecting piece and the tab; the technical requirement for ultrasonic welding of the battery cell tab and the aluminum connecting piece is met, free adjustment between the battery cell and the connecting piece can be achieved, and therefore the adaptability of the battery cell and the connecting piece in the welding process is improved, and the requirement for change of the welding position of the tab and the connecting piece in the assembling process is met.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core manufacturing, in particular to a welding positioning device for a battery core and a connecting piece. Background Art

[0002] Ultrasonic welding has excellent characteristics such as high welding strength, high efficiency, and low energy consumption. Therefore, it is increasingly widely used in the field of power lithium-ion batteries. 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. In the traditional welding of metal connecting pieces and battery cell tabs, the connecting pieces are basically horizontal structures, while the vertical connecting pieces are made of hard materials. The existing tooling cannot accurately position them, and it is impossible to perform ultrasonic welding of dozens of layers of battery cell tabs and aluminum connecting pieces, and it is impossible to complete the new project battery cell proofing and trial production.

[0003] In the current production process of power lithium batteries, the ultrasonic welding of the positive pole tabs and metal connecting pieces is a core step. For example, the ultrasonic welding of about 45 layers of positive aluminum foil and 0.6mm thick metal connecting pieces. The main ultrasonic welding head has two types of teeth: straight teeth and oblique teeth. It is a very important process in the assembly process of square shell batteries. Due to the needs of multiple process verification of power lithium battery cells and the trial production of new customer projects, the existing positive ultrasonic main welding device does not have a positioning structure design for the vertical hard metal connecting piece. After the welding process, the position of the connecting piece is very easy to change, and the welding head is very easy to hit the connecting piece when pressing down, resulting in the final weld mark position not meeting the process requirements and the weld mark is easy to crack during the welding process. The weld mark is not beautiful in appearance, and the welding head is easily damaged by impact. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to provide a connecting piece welding positioning device with high stability and adaptability.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A battery cell and connecting piece welding positioning device, comprising a tooling bottom plate, a battery cell width positioning piece is provided on the top length direction of the tooling bottom plate, and a battery cell length positioning piece is provided on one side of the top width direction of the tooling bottom plate;

[0007] A movable positioning plate is provided on the other side of the top width direction of the tooling bottom plate, and a connecting piece positioning mechanism is detachably installed on the top of the movable positioning plate.

[0008] The present application can realize free adjustment of the width and length directions of the battery cell by setting up the cooperation of the tooling bottom plate, the battery cell width positioning piece and the battery cell length positioning piece. At the same time, it is also provided with a movable positioning plate and a connecting piece positioning mechanism to realize free adjustment of the relative position of the aluminum connecting piece and the pole ear, so as to meet the process requirements of ultrasonic welding of the battery cell pole ear and the aluminum connecting piece. The above-mentioned settings can realize free adjustment between the battery cell and the connecting piece, thereby improving the adaptability and stability of the battery cell and the connecting piece during welding, so as to meet the requirements of the assembly process for changes in the welding position of the pole ear and the connecting piece. The present application operates well, has stable performance and is simple to repair and maintain.

[0009] As a further solution of the utility model: the battery cell width positioning member includes two groups of battery cell positioning plates, wherein the two groups of battery cell positioning plates are symmetrically arranged in the length direction of the top of the tooling bottom plate.

[0010] As a further solution of the utility model: the top of the battery cell positioning plate is symmetrically provided with two groups of waist-shaped holes, wherein the battery cells can be detachably installed in the waist-shaped holes on the battery cell positioning plate, and the opening direction of the two groups of waist-shaped holes is horizontal to the width direction of the tooling bottom plate.

[0011] As a further solution of the utility model: the top of the battery cell length positioning piece is also symmetrically provided with waist-shaped holes, and the opening direction of the waist-shaped holes is horizontal to the length direction of the tooling bottom plate.

[0012] As a further solution of the utility model: waist-shaped holes detachably connected to the connecting piece positioning mechanism are equidistantly provided on the movable positioning plate, and the opening direction of the waist-shaped holes is horizontal to the length direction of the tooling bottom plate.

[0013] As a further solution of the utility model: the connecting piece positioning mechanism includes a positioning seat, a guide column, a clamping block and a clamping spring, wherein a guide column is horizontally arranged at the middle position of the positioning seat, and the outer ends of the guide column are slidably connected with battery cell length positioning pieces, and the outer sides of the two battery cell length positioning pieces are respectively connected to the positioning seat through clamping springs.

[0014] As a further solution of the utility model: a slot corresponding to the connecting piece is provided on one side of the two groups of battery cell length positioning members facing the middle of the positioning seat.

[0015] As a further solution of the utility model: a horizontal baffle is provided at the middle position of the positioning seat and between the two battery cell length positioning members.

[0016] As a further solution of the utility model: the positioning seat is in an "L"-shaped structure.

[0017] As a further solution of the utility model: positioning clamps are provided on both sides of the exterior of the tooling base plate, wherein fine-tuning waist-shaped holes are opened on the positioning clamps.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] First, the present application can realize free adjustment of the width direction and length direction of the battery cell by setting the cooperation of the tooling bottom plate, the battery cell width positioning piece and the battery cell length positioning piece. At the same time, the cooperation of the movable positioning plate and the connecting piece positioning mechanism can realize free adjustment of the relative position of the aluminum connecting piece and the pole ear, so as to meet the process requirements of ultrasonic welding of the battery cell pole ear and the aluminum connecting piece. The above-mentioned settings can realize free adjustment between the battery cell and the connecting piece, thereby improving the adaptability of the battery cell and the connecting piece during welding, so as to meet the requirements of the assembly process for the change of the welding position of the pole ear and the connecting piece, and the present application operates well, has stable performance, and is simple to repair and maintain;

[0020] Secondly, the present application arranges two clamping blocks on the outside of the guide rod, and the two clamping blocks are supported by clamping springs. Both clamping blocks have slots for clamping the connecting piece, and the stability of the connecting piece is ensured under the elastic force of the clamping spring, ensuring that the upright aluminum connecting piece will not fall over, avoiding the risk of the welding head hitting the connecting piece when pressing down, and ensuring the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a battery cell and connecting piece welding positioning device according to an embodiment of the utility model;

[0022] Figure 2 This is a structural schematic diagram of a connecting piece positioning mechanism according to an embodiment of the utility model;

[0023] Figure 3 This is a top view of the battery cell and the connecting piece during welding according to an embodiment of the utility model;

[0024] Explanation of the accompanying drawings: 1. Tooling base plate; 2. Battery cell width positioning piece; 3. Battery cell length positioning piece; 4. Movable positioning plate; 5. Positioning clamp; 6. Connecting piece positioning mechanism; 61. Positioning seat; 62. Guide column; 63. Clamping block; 64. Clamping spring; 7. Connecting piece. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1A battery cell and connecting piece welding positioning device includes a tooling base plate 1, a battery cell width positioning member 2, a battery cell length positioning member 3, a movable positioning member 4, a positioning clamp 5 and a connecting piece positioning mechanism 6, wherein the battery cell width positioning member 2, the battery cell length positioning member 3, the movable positioning member 4 and the connecting piece positioning mechanism 6 are all arranged on the top of the tooling base plate 1, and the positioning clamp 5 is arranged on both sides of the tooling base plate 1.

[0027] Reference Figure 1 , the cell width positioning piece 2 is made of bakelite, and includes two groups of cell positioning plates, which are symmetrically installed on the top front-to-back direction of the tooling base plate 1 (that is, in the length direction of the tooling base plate 1), and there is a gap between the two groups of cell width positioning pieces 2, and the specific size of the gap depends on the actual size of the cell. Two groups of waist-shaped holes are symmetrically opened on the top of the cell positioning plate, and the adjustment range of each waist-shaped hole is: 0-10mm, which meets the 0-10mm adjustment in the cell width direction, wherein the cell can be detachably installed in the waist-shaped hole on the cell positioning plate, and the opening direction of the two groups of waist-shaped holes is horizontal to the width direction of the tooling base plate 1;

[0028] Reference Figure 1 The cell length positioning piece 3 is made of bakelite and is set in one group. One group of cell length positioning pieces 3 is set on the top right side of the tooling base plate 2 (that is, in the width direction of the tooling base plate 1), and the subsequent cells are installed on the cell width positioning piece 2 and the cell length positioning piece 3. The top of the cell positioning piece 3 is also symmetrically provided with a waist-shaped hole. The adjustment range of the waist-shaped hole is 0-10mm, which meets the adjustment of 0-10mm in the length direction of the cell. The opening direction of the waist-shaped hole is horizontal to the length direction of the tooling base plate 1.

[0029] It should be noted that the battery cell is placed on the tooling bottom plate 1, and the left and right position of the battery cell is achieved by adjusting the battery cell width positioning piece 2, with an adjustment range of 0-20mm. The front and rear position of the battery cell is achieved by adjusting the battery cell length positioning piece 3, with an adjustment range of 0-10mm.

[0030] For ease of understanding and description, the front, back, left, and right directions are all in Figure 1 It should be understood that this orientation setting is only for the convenience of description and understanding and cannot be understood as a limitation of the present invention.

[0031] Reference Figure 1The movable positioning member 4 is made of FR-4 material and is arranged on the top left side of the tooling base plate 2 (that is, in the width direction of the tooling base plate 1, corresponding to the battery cell length positioning member 3). The movable positioning plate 4 is equidistantly provided with waist-shaped holes detachably connected to the connecting piece positioning mechanism 6, which can meet the left and right adjustment of the aluminum connecting piece, and the adjustment range is 0-5mm. The opening direction of the waist-shaped hole is horizontal to the length direction of the tooling base plate 1. The left and right movement of the connecting piece 7 is achieved by adjusting the connecting piece positioning and adjusting the movable positioning member 4, and the adjustment range is 0-10mm.

[0032] Reference Figure 1 The positioning splint 5 is made of aluminum alloy and is provided with a fine-tuning waist-shaped hole to facilitate the locking and fixing of the splint. The positioning splint 5 can be installed on the welding equipment. The specific installation location can be determined according to the actual situation on site. This application does not limit it. The adjustment and positioning of the tooling base plate 1 is achieved through the positioning splint 5, and the adjustment range is: 0-10mm.

[0033] Reference Figure 2 and Figure 3 The connecting piece positioning mechanism 6 is made of FR-4 material, which can be detachably mounted on the movable positioning member 4 and can be mounted in the waist-shaped hole on the movable positioning member 3 by bolts. The connecting piece positioning mechanism 6 includes a positioning seat 61, a guide column 62, a clamping block 63 and a clamping spring 64, wherein a guide column 62 is transversely arranged at the middle position of the positioning seat 61, and the outer ends of the guide column 62 are slidably connected with the battery cell positioning members 3. The outer sides of the two battery cell positioning members 3 are respectively connected to the positioning seat 61 by clamping springs 64. The clamping springs 64 facilitate the movement of the battery cell positioning member 3 in 0-5mm, so as to quickly install the positioning aluminum connecting piece;

[0034] The aluminum connecting piece positioning mechanism 6 can ensure that the vertical side of the aluminum connecting piece 7 is 90 degrees to the horizontal side, avoiding the risk of the connecting piece being hit when the welding head is pressed down, thereby improving the welding quality and welding yield.

[0035] Furthermore, the two groups of battery cell positioning members 3 are provided with a slot corresponding to the connecting piece 7 on one side facing the middle of the positioning seat 61, and a horizontal baffle is provided in the middle position of the positioning seat 61 and between the two battery cell positioning members 3. When the connecting piece 7 is installed, the back of the connecting piece 7 is against the horizontal baffle, and the two sides are respectively inserted into the slots on the two clamping blocks 63. The front and rear positioning of the connecting piece 7 is achieved by adjusting the connecting piece positioning mechanism 6, and the adjustment range is: 0-5mm.

[0036] The specific operating principles of this application are as follows:

[0037] S1. First, spray a little alcohol on the surface of the welding head and welding seat, and use a wire brush to gently brush the welding head and welding seat back and forth 5 times each;

[0038] S2. Use a dust-free cloth to carefully wipe the surface of the welding head and welding seat until there is no obvious foreign matter on the surface of the welding head and welding seat;

[0039] S3. Use a dust-free cloth dipped in a little alcohol to wipe the surface and surroundings of the battery core welding tooling three times until there is no obvious foreign matter on the surface of the welding head and welding seat;

[0040] S4. Use your left hand to move the left clamping block 63 of the aluminum connecting piece positioning mechanism 6 to the left. The spacing between the left and right clamping blocks 63 can ensure that the connecting piece 7 can be freely inserted. Then put the connecting piece 7 between the left and right clamping blocks 63 and release your left hand. Do not release your left hand before the connecting piece 7 is clamped and installed.

[0041] S5. Place the positioning tool on the aluminum plate platform of the ultrasonic welding machine. According to the size of the battery cell, first adjust it to the center position. The welding head needs to be in the middle of the width direction of the battery cell.

[0042] S6. Gently separate the two pieces of the horizontal side of the aluminum connecting piece 7 with your fingers, then gently put the positive electrode ear of the battery cell between the two pieces, and gently press the upper connecting piece with your gloved fingers;

[0043] S7. According to the requirements of the battery core welding process, the matching position of the aluminum connecting piece 7 and the positive electrode ear of the battery core is reasonably adjusted, and welding is started after the position adjustment is completed;

[0044] S8. After welding is completed, first use your left hand to move the left clamping block 63 to the left to a suitable distance, ensure that the battery cell can be freely removed from the connecting piece positioning mechanism 6, then release your left hand and take the battery cell down with your right hand.

[0045] It should be noted that the battery cell is placed on a welding tooling consisting of a tooling base plate 1, a battery cell width positioning piece 2, a battery cell length positioning piece 3, a movable positioning piece 4, a positioning clamp 5 and a connecting piece positioning mechanism 6. By adjusting the vertical rise and fall of the tooling platform, the battery cell pole ear can be conveniently placed in the middle of the connecting piece to meet the welding position required by the process; the width adjustment block and the length adjustment block on the welding tooling can adjust the width and length directions of the battery cell to meet the welding position required by the process; the aluminum connecting piece positioning mechanism 6 and the movable positioning piece 4 on the welding tooling can adjust and position the connecting piece in the front and back, left and right, up and down directions to meet the welding position required by the process.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery cell and connecting piece welding positioning device, characterized in that: It comprises a tooling base plate (1), wherein a battery cell width positioning piece (2) is provided on the top length direction of the tooling base plate (1), and a battery cell length positioning piece (3) is provided on one side of the top width direction of the tooling base plate (1); A movable positioning plate (4) is provided on the other side of the top width direction of the tooling base plate (1), and a connecting piece positioning mechanism (6) is detachably mounted on the top of the movable positioning plate (4).

2. A battery cell and connecting piece welding positioning device according to claim 1, characterized in that: The cell width positioning member (2) comprises two groups of cell positioning plates, wherein the two groups of cell positioning plates are symmetrically arranged in the length direction of the top of the tooling bottom plate (1).

3. A battery cell and connecting piece welding positioning device according to claim 2, characterized in that: The top of the battery cell positioning plate is symmetrically provided with two groups of waist-shaped holes, wherein the battery cells can be detachably installed in the waist-shaped holes on the battery cell positioning plate, and the opening direction of the two groups of waist-shaped holes is horizontal to the width direction of the tooling bottom plate (1).

4. The battery cell and connecting piece welding positioning device according to claim 1, characterized in that: The top of the battery cell length positioning piece (3) is also symmetrically provided with a waist-shaped hole, and the opening direction of the waist-shaped hole is horizontal to the length direction of the tooling bottom plate (1).

5. The battery cell and connecting piece welding positioning device according to claim 1, characterized in that: The movable positioning plate (4) is provided with waist-shaped holes detachably connected to the connecting piece positioning mechanism (6) at equal intervals, and the opening direction of the waist-shaped holes is parallel to the length direction of the tooling bottom plate (1).

6. The battery cell and connecting piece welding positioning device according to claim 1, characterized in that: The connecting piece positioning mechanism (6) comprises a positioning seat (61), a guide column (62), a clamping block (63) and a clamping spring (64), wherein a guide column (62) is transversely arranged at the middle position of the positioning seat (61), and the outer ends of the guide column (62) are slidably connected to the battery cell length positioning pieces (3), and the outer sides of the two battery cell length positioning pieces (3) are respectively connected to the positioning seat (61) through the clamping springs (64).

7. A battery cell and connecting piece welding positioning device according to claim 6, characterized in that: The two groups of battery cell length positioning members (3) are both provided with a slot corresponding to the connecting piece on one side facing the middle of the positioning seat (61).

8. The battery cell and connecting piece welding positioning device according to claim 6, characterized in that: A horizontal baffle is provided at the middle position of the positioning seat (61) and between the two battery cell length positioning members (3).

9. The battery cell and connecting piece welding positioning device according to claim 6, characterized in that: The positioning seat (61) is in an "L"-shaped structure.

10. The battery cell and connecting piece welding positioning device according to claim 1, characterized in that: Positioning clamps (5) are provided on both sides of the exterior of the tooling base plate (1), wherein the positioning clamps (5) are provided with fine-tuning waist-shaped holes.

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