Superwelding positioning clamp for lithium ion battery

Abstract

The utility model relates to the technical field of lithium battery manufacturing, and discloses a lithium ion battery super welding positioning clamp which comprises a bottom plate, a strip-shaped groove is formed in the right side of the upper surface of the bottom plate, a supporting rod is fixedly connected to the upper surface of the bottom plate, a fixed plate is fixedly connected to the upper end of the supporting rod, a movable plate is arranged below the fixed plate, and the movable plate is fixedly connected with the strip-shaped groove. An elastic part is fixedly connected to the upper surface of the moving plate, a connecting rod is rotatably connected to the upper surface of the moving plate, a limiting unit is arranged on the outer side of the connecting rod, a pressing plate is arranged below the moving plate, and a moving unit is arranged on the outer side of the pressing plate. According to the lithium battery welding fixture, the position of the pressing plate can be adjusted through the cooperation of the arranged moving plate, the elastic piece, the connecting rod, the limiting unit and the moving unit, so that the fixture can clamp and position lithium batteries with different thicknesses, and clamping of the lithium batteries can be quickly relieved after welding is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a super welding positioning fixture for lithium electronic batteries. Background Art

[0002] A lithium battery is a battery that uses lithium metal or lithium alloy as the positive electrode material, carbon material or other types of materials as the negative electrode, and a non-aqueous electrolyte solution. The production process of lithium batteries involves a tab welding process. Specifically, ultrasonic welding is used to weld the external tabs on the tabs extending from the inner core for subsequent batteries. The most widely used welding equipment now is the ultrasonic welding machine, which can complete the automated welding of lithium batteries.

[0003] After searching, Chinese patent announcement number: CN210306225U discloses a square lithium battery multi-electrode ultrasonic welding fixture, which includes adjusting the relative position of the fixed upper plate and the fixed lower plate, placing the battery cell in the battery cell placement area between the fixed upper plate and the fixed lower plate, adjusting the first adjusting nut and the second adjusting nut to clamp the battery cell, and then performing welding processing. The relative position of the fixed upper plate and the fixed lower plate can be freely adjusted, and it is suitable for welding battery cells of different sizes.

[0004] However, in actual use of the above-mentioned positioning fixture, after adjusting the first adjusting nut and the second adjusting nut to clamp the battery cell, when the welded lithium battery needs to be taken out, it is necessary to screw multiple nuts in sequence to release the limit on the fixed upper plate and the lithium battery, and then the lithium battery can be taken out for subsequent processing, which seriously affects the processing efficiency. Therefore, a lithium electronic battery super welding positioning fixture is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a lithium electronic battery super welding positioning fixture, which aims to improve the problem in the prior art that the lithium battery cannot be quickly removed after welding.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a lithium-ion battery super-welding positioning fixture comprises a base plate, a strip groove is opened on the right side of the upper surface of the base plate, the upper surface of the base plate is fixedly connected to a support rod, the upper end of the support rod is fixedly connected to a fixed plate, a movable plate is provided below the fixed plate, the upper surface of the movable plate is fixedly connected to an elastic member, the upper surface of the movable plate is rotatably connected to a connecting rod, a limiting unit is provided on the outer side of the connecting rod, the limiting unit is used for limiting the connecting rod after it moves upward, a pressure plate is provided below the movable plate, a moving unit is provided on the outer side of the pressure plate, and the moving unit is used for the pressure plate to move up and down relative to the movable plate.

[0007] As a further description of the above technical solution:

[0008] A circular hole is provided on the upper surface of the pressing plate, a cylindrical cavity is provided inside the circular hole, a moving rod is inserted into the circular hole, and a circular ring is fixedly connected to the outer side of the moving rod.

[0009] As a further description of the above technical solution:

[0010] The limiting unit includes a circular plate, which is fixedly connected to the upper end of the connecting rod. A vertical rod is fixedly connected to the outer side of the connecting rod. A through hole is opened on the upper surface of the fixed plate, and a rectangular groove is opened on the inner wall surface of the through hole.

[0011] As a further description of the above technical solution:

[0012] The moving unit includes a screw rod, which is rotatably connected to the upper surface of the pressure plate. The upper end of the screw rod passes through the moving plate. The upper end of the screw rod is fixedly connected to a handle. The upper surface of the pressure plate is fixedly connected to a limiting rod.

[0013] As a further description of the above technical solution:

[0014] The upper surface of the elastic member is fixedly connected to the bottom surface of the fixing plate, and the bottom surface of the pressing plate is fixedly connected to a rubber pad.

[0015] As a further description of the above technical solution:

[0016] The circular ring is plugged into the interior of the cylindrical cavity, and the bottom end of the circular hole passes through the pressing plate.

[0017] As a further description of the above technical solution:

[0018] The connecting rod passes through the through hole, and the vertical rod is plugged into the inside of the rectangular groove.

[0019] As a further description of the above technical solution:

[0020] The upper end of the limiting rod passes through the movable plate, and the screw rod is threadedly connected to the movable plate.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present invention, the position of the pressure plate can be adjusted by cooperating with the movable plate, elastic member, connecting rod, limiting unit and movable unit, so that the clamp can clamp and position lithium batteries of different thicknesses, and can quickly release the clamping of the lithium battery after welding is completed, avoiding the need to screw multiple nuts to remove the lithium battery, which affects the processing progress. At the same time, the pressure plate can be limited after it moves upward, avoiding the need to overcome the elastic potential energy of the elastic member when removing the lithium battery.

[0023] 2. In the present invention, by cooperating with the circular hole, cylindrical cavity, movable rod and circular ring, when the clamping plate clamps the lithium battery, the staff can visually observe the clamping progress, thereby avoiding damage to the lithium battery caused by excessive clamping due to the inconvenience of observing the clamping progress under the pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a lithium-ion battery super-welding positioning fixture proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of a movable plate, elastic member, connecting rod and pressure plate of a lithium-ion battery super-welding positioning fixture proposed in the present invention;

[0026] Figure 3 This is a schematic diagram of a fixing plate of a lithium-ion battery super-welding positioning fixture proposed in the present invention;

[0027] Figure 4 This is a schematic diagram of a cross-section of the internal part of a pressure plate of a lithium-ion battery super-welding positioning fixture proposed by the present invention;

[0028] Figure 5 This is a schematic diagram of a front cross-sectional view of a pressure plate of a lithium-ion battery super-welding positioning fixture proposed by the present invention.

[0029] Legend:

[0030] 1. Bottom plate; 2. Strip groove; 3. Support rod; 4. Fixed plate; 5. Moving plate; 6. Elastic member; 7. Connecting rod; 71. Circular plate; 72. Vertical rod; 73. Through hole; 74. Rectangular groove; 8. Pressing plate; 81. Screw; 82. Handle; 83. Limiting rod; 9. Circular hole; 10. Cylindrical cavity; 11. Moving rod; 12. Ring. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figure 1The utility model provides an embodiment: a lithium-ion battery super-welding positioning fixture, comprising a base plate 1, a strip groove 2 is opened on the right side of the upper surface of the base plate 1, the strip groove 2 is used to fix the winding core cover plate, and prevent the soft connection in the lithium battery cover plate and the pole ear of the winding core from deviating inward and outward due to the vibration of the welding head during the welding process, which eventually leads to difficulty in inserting into the shell, a support rod 3 is fixedly connected to the upper surface of the base plate 1, and a fixing plate 4 is fixedly connected to the upper end of the support rod 3. After the lithium battery is placed on the base plate 1, the pressure plate 8 can be driven to move downward to clamp and position the lithium battery, so as to avoid the lithium battery from deviating during the super-welding process, which affects the welding effect with the pole ear.

[0033] Reference Figure 2-Figure 3 , a movable plate 5 is provided below the fixed plate 4, and an elastic member 6 is fixedly connected to the upper surface of the movable plate 5, and the upper surface of the elastic member 6 is fixedly connected to the bottom surface of the fixed plate 4. When the movable plate 5 moves upward, the elastic member 6 can be squeezed, so that the elastic member 6 is compressed to generate elastic potential energy, and the upper surface of the movable plate 5 is rotatably connected to the connecting rod 7. When the connecting rod 7 performs linear motion in the up and down directions, the movable plate 5 can be driven to move synchronously. At the same time, the connecting rod 7 can rotate around the connection with the movable plate 5. A limiting unit is provided on the outside of the connecting rod 7. The limiting unit includes a circular plate 71, and the circular plate 71 is fixedly connected to the connecting rod 7. The staff can pull the connecting rod 7 through the circular plate 71 at the upper end to facilitate the movement of the connecting rod 7. The outer side of the connecting rod 7 is fixedly connected to the vertical rod 72. When the connecting rod 7 moves, it can drive the vertical rod 72 to move synchronously. The upper surface of the fixed plate 4 is provided with a through hole 73, and the connecting rod 7 passes through the through hole 73. The through hole 73 can guide and limit the movement of the connecting rod 7, so that the connecting rod 7 can only move linearly in the up and down directions. The inner wall surface of the through hole 73 is provided with a rectangular groove 74, and the vertical rod 72 is plugged into the inside of the rectangular groove 74. The vertical rod 72 can move linearly in the up and down directions inside the rectangular groove 74.

[0034] When the lithium battery is over-welded and the battery needs to be taken out, the circular plate 71 can be pulled upward, and the movable plate 5 can be driven downward by the connecting rod 7, thereby driving the pressure plate 8 to quickly release the fit with the lithium battery, avoiding the need to tighten multiple nuts to release the limit of the fixed upper plate and take out the lithium battery when the lithium battery is clamped and positioned by the cooperation of bolts, nuts and the fixed upper plate, which affects the processing progress. While driving the pressure plate 8 to move upward, the vertical rod 72 will be driven to move upward synchronously. When the bottom end of the vertical rod 72 leaves the rectangular groove 74, the circular plate 71 and the connecting rod 7 can be rotated so that the bottom surface of the vertical rod 72 fits with the upper surface of the fixed plate 4, limiting the movable plate 5 and the pressure plate 8, avoiding the need to overcome the elastic potential energy of the elastic member 6 when taking the lithium battery away.

[0035] A pressing plate 8 is provided below the movable plate 5. A rubber pad is fixedly connected to the bottom surface of the pressing plate 8 to prevent the pressing plate 8 from having a hard contact with the lithium battery, which may damage the lithium battery. A moving unit is provided on the outside of the pressing plate 8. The moving unit includes a screw 81. The screw 81 is rotatably connected to the upper surface of the pressing plate 8. The upper end of the screw 81 passes through the movable plate 5. The screw 81 is threadedly connected to the movable plate 5. When the screw 81 is rotated, it can perform a linear motion in the up and down directions relative to the movable plate 5. The upper end of the screw 81 is fixedly connected to a handle 82. The staff can rotate the handle 82 The movable screw 81 and the upper surface of the pressure plate 8 are fixedly connected to the limiting rod 83, and the upper end of the limiting rod 83 passes through the movable plate 5. The movement of the pressure plate 8 can be guided and limited by the setting limiting rod 83, so that the pressure plate 8 can only perform linear motion in the up and down directions. The staff can turn the handle 82 to drive the screw 81 to rotate, and then drive the pressure plate 8 to perform linear motion in the up and down directions under the limit of the limiting rod 83, so that the distance between the pressure plate 8 and the movable plate 5 can be adjusted according to the thickness of different lithium batteries to avoid excessive squeezing of the lithium batteries and damage to the lithium batteries.

[0036] Reference Figure 4-Figure 5 A circular hole 9 is provided on the upper surface of the pressing plate 8, and the bottom end of the circular hole 9 passes through the pressing plate 8. A cylindrical cavity 10 is provided inside the circular hole 9. A moving rod 11 is inserted into the inside of the circular hole 9. The moving rod 11 can perform linear motion in the up and down directions inside the circular hole 9. A circular ring 12 is fixedly connected to the outside of the moving rod 11. When the moving rod 11 moves, it can drive the circular ring 12 to move synchronously. The circular ring 12 is inserted into the inside of the cylindrical cavity 10, and the circular ring 12 can perform linear motion in the up and down directions inside the cylindrical cavity 10, and can limit the moving rod 11 to prevent the moving rod 11 from escaping from the inside of the circular hole 9. When a lithium battery is placed under the pressing plate 8, the bottom end of the moving rod 11 will protrude from the pressing plate 8. At the same time, the length of the moving rod 11 is consistent with the total thickness of the pressing plate 8 and the rubber pad.

[0037] When a lithium battery is placed on the bottom plate 1, the staff can twist the circular plate 71 to drive the vertical rod 72 to align with the rectangular groove 74, release the limit on the movable plate 5, and allow the movable plate 5 and the pressure plate 8 to move downward under the elastic potential energy of the elastic member 6. Then the staff can twist the handle 82 to drive the pressure plate 8 to move downward, so that the pressure plate 8 is in contact with the lithium battery and clamps the lithium battery in position. The lithium battery will push the movable rod 11, causing the movable rod 11 to move upward inside the circular hole 9. When the upper surface of the movable rod 11 is flush with the upper surface of the pressure plate 8, or slightly higher than the upper surface of the pressure plate 8, the pressure plate 8 has completed clamping and positioning the lithium battery, avoiding excessive downward movement of the pressure plate 8, which may cause excessive squeezing of the lithium battery and damage to the lithium battery.

[0038] Working principle: Place the lithium battery on the bottom plate 1, rotate the circular plate 71 to move the vertical rod 72 to align with the rectangular groove 74, release the limit on the movable plate 5, and make the movable plate 5 and the pressure plate 8 move downward under the elastic potential energy of the elastic member 6. Then the staff can turn the handle 82 to drive the screw 81 to rotate, so that the pressure plate 8 moves downward through the limit of the limit rod 83. When the upper surface of the movable rod 11 is aligned with or slightly higher than the upper surface of the pressure plate 8, the clamping and positioning is completed, so that the clamp can clamp and position lithium batteries of different thicknesses. Personnel can perform super welding on lithium batteries and tabs. After welding is completed, the staff can directly pull the circular plate 71 upward to drive the movable plate 5 and the pressure plate 8 to move upward, thereby releasing the clamping and positioning of the lithium battery. When the bottom end of the vertical rod 72 is higher than the fixed plate 4, the circular plate 71 is rotated so that the bottom surface of the vertical rod 72 fits with the upper surface of the fixed plate 4, limiting the movable plate 5 and the pressure plate 8. As a result, the staff can take or place the lithium battery without having to overcome the elastic potential energy of the elastic part 6, thereby reducing the difficulty of operation and allowing the lithium battery to be taken quickly.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lithium-ion battery super-welding positioning fixture, comprising a base plate (1), characterized in that: A strip groove (2) is provided on the right side of the upper surface of the bottom plate (1); a support rod (3) is fixedly connected to the upper surface of the bottom plate (1); the upper end of the support rod (3) is fixedly connected to the fixed plate (4); a movable plate (5) is provided below the fixed plate (4); an elastic member (6) is fixedly connected to the upper surface of the movable plate (5); a connecting rod (7) is rotatably connected to the upper surface of the movable plate (5); a limiting unit is provided on the outer side of the connecting rod (7); the limiting unit is used for limiting the position of the connecting rod (7) after it moves upward; a pressing plate (8) is provided below the movable plate (5); a moving unit is provided on the outer side of the pressing plate (8); the moving unit is used for the pressing plate (8) to move up and down relative to the movable plate (5).

2. The lithium-ion battery super-welding positioning fixture according to claim 1, characterized in that: A circular hole (9) is provided on the upper surface of the pressure plate (8), a cylindrical cavity (10) is provided inside the circular hole (9), a moving rod (11) is inserted into the inside of the circular hole (9), and a circular ring (12) is fixedly connected to the outer side of the moving rod (11).

3. The lithium-ion battery super-welding positioning fixture according to claim 1, characterized in that: The limiting unit comprises a circular plate (71), the circular plate (71) is fixedly connected to the upper end of the connecting rod (7), the outer side of the connecting rod (7) is fixedly connected to a vertical rod (72), the upper surface of the fixing plate (4) is provided with a through hole (73), and the inner wall surface of the through hole (73) is provided with a rectangular groove (74).

4. The lithium-ion battery super-welding positioning fixture according to claim 1, characterized in that: The movable unit comprises a screw rod (81), the screw rod (81) is rotatably connected to the upper surface of the pressing plate (8), the upper end of the screw rod (81) passes through the movable plate (5), the upper end of the screw rod (81) is fixedly connected to a handle (82), and the upper surface of the pressing plate (8) is fixedly connected to a limiting rod (83).

5. The lithium-ion battery super-welding positioning fixture according to claim 1, characterized in that: The upper surface of the elastic member (6) is fixedly connected to the bottom surface of the fixed plate (4), and the bottom surface of the pressing plate (8) is fixedly connected to a rubber pad.

6. The lithium-ion battery super-welding positioning fixture according to claim 2, characterized in that: The circular ring (12) is plugged into the interior of the cylindrical cavity (10), and the bottom end of the circular hole (9) passes through the pressing plate (8).

7. The lithium-ion battery super-welding positioning fixture according to claim 3, characterized in that: The connecting rod (7) passes through the through hole (73), and the vertical rod (72) is plugged into the interior of the rectangular groove (74).

8. The lithium-ion battery super-welding positioning fixture according to claim 4, characterized in that: The upper end of the limiting rod (83) passes through the movable plate (5), and the screw rod (81) and the movable plate (5) are threadedly connected.

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