A lithium-ion cylindrical battery cell tab welding device

Abstract

The present invention belongs to the field of battery manufacturing technology, and in particular, relates to a lithium-ion cylindrical battery cell pole lug welding device, the lithium-ion cylindrical battery cell pole lug welding device comprises a spring tightening mechanism, a pole lug clamping device, a V-shaped block and a bottom plate for placing the cylindrical battery cell, the V-shaped block is arranged in the center of the bottom plate, and one side of the V-shaped block is provided with a pole lug clamping device for clamping the battery welding assembly and the pole lug up and down, the spring tightening mechanism is located on both sides of the V-shaped block, respectively against the negative pole column and the positive pole cover, and the central axis of the cylindrical battery cell is tightened, and the cylindrical battery cell and the battery welding assembly are coaxial. The present invention provides a lithium-ion cylindrical battery cell pole lug welding device that can effectively improve welding efficiency and welding quality.

Description

Technical Field

[0001] The invention belongs to the technical field of battery manufacturing, and in particular relates to a lithium-ion cylindrical battery cell tab welding device. Background Art

[0002] Existing technologies and defects:

[0003] As my country increases its support for new energy, the lithium-ion battery industry has also ushered in great development opportunities. Due to the advantages of lithium-ion batteries such as green environmental protection, high energy, and long cycle life, they are widely used in electric vehicles, space satellites and other fields, and the market demand is becoming increasingly strong, which puts higher and stricter requirements on the quality and efficiency of laser welding between the tabs and the corresponding battery structural parts.

[0004] However, the existing tab welding method has problems such as large welding size error, low welding efficiency, and unguaranteed welding quality, and can no longer meet the increasing market requirements for high standards of tab welding.

[0005] The difficulty and significance of solving the above technical problems:

[0006] Therefore, based on these problems, it is of great practical significance to provide a lithium-ion cylindrical battery cell tab welding device that can effectively improve welding efficiency and welding quality. Summary of the invention

[0007] The object of the present invention is to solve the technical problems existing in the known technology and to provide a lithium ion cylindrical battery cell tab welding device which can effectively improve the welding efficiency and welding quality.

[0008] The technical solution adopted by the present invention to solve the technical problems existing in the known technology is:

[0009] A lithium-ion cylindrical battery cell tab welding device, the lithium-ion cylindrical battery cell tab welding device comprising a spring tightening mechanism, a tab clamping device, a V-shaped block and a bottom plate for placing the cylindrical battery cell, the V-shaped block is arranged in the center of the bottom plate, and one side of the V-shaped block is provided with a tab clamping device for clamping the battery welding assembly and the tab up and down, the spring tightening mechanism is located on both sides of the V-shaped block, respectively against the negative pole and the positive pole cover, and the central axis of the cylindrical battery cell is tightened, and the cylindrical battery cell and the battery welding assembly are coaxial;

[0010] The spring tightening mechanism comprises a block, a base, a bushing, a tightening rod, a spring, a brake block and a knob handle, the block is fixed to the base by a screw, a block hole is opened in the center of the block, the bushing and the brake block are embedded in the two ends of the block hole, the tightening rod passes through the bushing, the block hole and the brake block, and is connected to the knob handle, the tightening rod can move along the central axis of the block hole, the spring is sleeved on the tightening rod, one end of the spring is against the bushing, and the other end is against the tightening rod;

[0011] The pole ear clamping device includes an anti-falling knob, a crimping base plate, a support block, an I-shaped pressure plate and a support plate, the crimping base plate is fixed to the base plate, the support block is fixedly connected to the crimping base plate by screws, both ends of the support plate are clamped on the fixing grooves at the top of the support block to limit the position thereof, a limiting groove and a through hole are provided on the support plate to prevent the negative pole column from adhering to the support plate after welding is completed, the limiting groove accommodates the stacked negative pole column and the pole ear, and when the anti-falling knob is tightened, the I-shaped pressure plate is clamped with the support plate.

[0012] The support plate plays a role in installing and positioning the tabs and battery components, and provides support during welding, and effectively increases the heat dissipation area.

[0013] The present invention can also adopt the following technical solutions:

[0014] In the above-mentioned lithium-ion cylindrical battery cell tab welding device, further, the tab clamping device also includes a guide rod, which is fixed to the crimping base plate by threads, and the guide rod passes through an I-shaped pressure plate, and the I-shaped pressure plate can move up and down along the guide rod.

[0015] The "X"-shaped pressing plate can move up and down along the guide rod, thereby playing a guiding role. The "X"-shaped pressing plate moves downward through the guide rod to press the pole ear and the welding part.

[0016] In the above-mentioned lithium-ion cylindrical battery cell tab welding device, further, the cross section of the brake block is rectangular, and it is sleeved on the tightening rod. When it rotates 90 degrees around the tightening rod, the brake block is hung on the stopper.

[0017] Pull the tightening rod by turning the knob, and rotate the brake block 90° counterclockwise or 90° clockwise to tighten and loosen the battery cell.

[0018] In summary, the present invention has the following advantages and positive effects:

[0019] 1. The present invention is a production tooling required for laser welding of positive and negative current collectors of lithium-ion cylindrical battery cells with corresponding battery structural parts. Through the design of the tooling, the production efficiency is increased by more than 200%. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0021] Figure 1 , a schematic diagram of the overall structure of the present invention;

[0022] Figure 2-1 , a schematic structural diagram of the tab clamping device of the present invention;

[0023] Figure 2-2 , a partial schematic diagram of the tab clamping device of the present invention;

[0024] Figure 3 , a schematic structural diagram of the spring tightening mechanism of the present invention.

[0025] In the figure:

[0026] 1. Spring tightening mechanism, 2. Tab clamping device, 3. V-shaped block, 4. Bottom plate;

[0027] 2-1, anti-drop knob, 2-2, crimping base plate, 2-3, support block, 2-4, I-shaped pressure plate, 2-5, support plate, 2-6, guide rod, 2-7 fixing slot, 2-8 limiting slot, 2-9 through hole;

[0028] 1-1, stopper, 1-2, base, 1-3, bushing, 1-4, tightening rod, 1-5, spring, 1-6, brake block, 1-7, knob handle. DETAILED DESCRIPTION

[0029] The following is combined Figure 1-3 The present invention will be described in detail.

[0030] A lithium-ion cylindrical battery tab welding device is provided, wherein a V-block 3 is arranged to be fixed on a base plate 4, a tab clamping device 2 is arranged on the right side of the V-block 3, and spring tightening mechanisms 1 are respectively arranged on the left and right sides of the V-block 3 and the tab clamping device 2. When performing tab welding, a cylindrical battery cell is placed on the V-block 3, the battery cell is centrally positioned, and the spring tightening mechanisms 1 at both ends tighten the central axis to ensure that the battery cell and the battery welding assembly are in coaxiality. The tab clamping device 2 clamps the battery welding assembly and the tab up and down, and the support plates 2-5 in the tab clamping device increase the heat dissipation area. The welding of the battery cell tab and battery-related components is completed by laser welding equipment.

[0031] The cylindrical lithium-ion battery is placed on the V-shaped block 3, and the V-shaped block 3 is fixed on the bottom plate 4 by screws.

[0032] The tab clamping device is mainly composed of a pressing block I-shaped pressing plate 2-4, a guide rod 2-6, a support plate 2-5, a support block 2-3 and a pressing base plate 2-2. The crimping base plate 2-2 is fixed on the base plate 4, and the support block 2-3 is connected and fixed to the crimping base plate 2-2 by screws. The two ends of the support plate 2-5 are clamped on the fixing grooves 2-7 on the top of the support block 2-3 to limit its position. The support plate 2-5 is provided with limiting grooves 2-8 and through holes 2-9. The limiting grooves 2-8 contain the negative pole column and the pole ear stacked, and the through holes 2-9 prevent the negative pole column and the pole ear from adhering to the support plate after welding. It plays an installation positioning role for the pole ear and the battery assembly, and plays a supporting role during welding, and effectively increases the heat dissipation area. The guide rod 2-6 is fixed to the crimping base plate 2-2 by threads, and the "J"-shaped pressing plate 2-4 can move up and down along the guide rod 2-6, thereby playing a guiding role. The "J"-shaped pressing plate 2-4 moves downward through the guide rod 2-6 to press the pole ear and the welded part, and the anti-falling knob 2-1 is tightened to clamp and fix the "J"-shaped pressing plate 2-4.

[0033] The spring tightening mechanism is mainly composed of a block 1-1, a tightening rod 1-4, a spring 1-5, a brake block 1-6 and a knob handle 1-7. The block 1-1 is fixed to the base 1-2 by screws, the bushing 1-3 is embedded in the block 1-1, the tightening rod 1-4 passes through the bushing, the block hole and the brake block 1-6, and is connected to the knob handle 1-7. The spring 1-5 is placed on the tightening rod 1-4, and the tightening rod 1-4 is pulled by the knob handle 1-7 to achieve the tightening action of the battery cell.

[0034] The cylindrical battery cell is placed on the V-block 3, the battery cell is centrally positioned, and the spring tightening mechanisms 1 at both ends tighten the center axis to ensure that the battery cell and the battery welding assembly are coaxial. The pole tab clamping device 2 clamps the battery welding assembly and the pole tab up and down. The support plate in the pole tab clamping device 2 increases the heat dissipation area. Finally, the laser welding equipment is used to complete the welding of the battery cell pole tab and battery-related components. The design of this tooling can increase the production efficiency by more than 200%.

[0035] In summary, the present invention provides a lithium-ion cylindrical battery cell tab welding device that can effectively improve welding efficiency and welding quality.

[0036] The above embodiments describe the present invention in detail, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A lithium-ion cylindrical battery tab welding device, characterized in that: The lithium-ion cylindrical battery cell tab welding device comprises a spring tightening mechanism, a tab clamping device, a V-shaped block and a bottom plate for placing the cylindrical battery cell, wherein the V-shaped block is arranged in the center of the bottom plate, and a tab clamping device for clamping the battery welding assembly and the tab up and down is arranged on one side of the V-shaped block, and the spring tightening mechanism is located on both sides of the V-shaped block, respectively pressing against the negative pole column and the positive pole cover, tightening the central axis of the cylindrical battery cell, and the cylindrical battery cell and the battery welding assembly are coaxial; The spring tightening mechanism comprises a block, a base, a bushing, a tightening rod, a spring, a brake block and a knob handle, the block is fixed to the base by a screw, a block hole is opened in the center of the block, the bushing and the brake block are embedded in the two ends of the block hole, the tightening rod passes through the bushing, the block hole and the brake block, and is connected to the knob handle, the tightening rod can move along the central axis of the block hole, the spring is sleeved on the tightening rod, one end of the spring is against the bushing, and the other end is against the tightening rod; The pole ear clamping device comprises an anti-falling knob, a crimping base plate, a support block, an I-shaped pressing plate and a support plate, wherein the crimping base plate is fixed to the base plate, the support block is fixedly connected to the crimping base plate by screws, the two ends of the support plate are clamped on the fixing grooves at the top of the support block, and the support plate is limited and placed, and a limiting groove and a through hole are provided on the support plate to prevent the negative pole column and the pole ear from adhering to the support plate after welding is completed, the limiting groove accommodates the stacking of the negative pole column and the pole ear, and when the anti-falling knob is tightened, the I-shaped pressing plate is clamped with the support plate; The tab clamping device further comprises a guide rod, which is fixed to the crimping bottom plate by a thread, and passes through an I-shaped pressing plate, and the I-shaped pressing plate can move up and down along the guide rod; The cross section of the brake block is rectangular and is sleeved on the push rod. When the brake block is rotated 90 degrees around the push rod, the brake block is hung on the stopper.

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