A lithium-ion battery electrode tab welding device

Abstract

The present invention relates to a welding device, and particularly to a welding device for the tabs of lithium-ion battery electrode sheets. The present invention provides a welding device for the tabs of lithium-ion battery electrode sheets that can position the tabs and achieve precise welding. The present invention provides such a welding device for the tabs of lithium-ion battery electrode sheets, which includes a support frame, a storage battery, and a laser welding machine. A storage battery capable of providing power is fixedly arranged at the top of the support frame. Laser welding machines capable of welding the tabs are fixedly arranged symmetrically on the left and right of the upper part of the support frame. The laser welding machines are connected to the storage battery through electric wires. The staff inserts two electrode sheets into the left and right parts of the positioning plate. Under the action of the positioning plate, the electrode sheets coincide with the places of the lithium-ion battery that need to be welded, thus achieving the purpose of precise welding. The second elastic member drives the limit blocks to move towards each other and reset to limit the lithium-ion battery, preventing the lithium-ion battery from displacing during the welding process.

Description

Technical Field

[0001] The present invention relates to a welding device, and more particularly to a welding device for the tabs of lithium-ion battery electrode sheets. Background Art

[0002] The tab of a lithium-ion power battery, as the name implies, is the tab used on a power battery, and its specification dimensions and current passing value are very large; it is a raw material for lithium-ion polymer battery products; for example, mobile phone batteries, Bluetooth batteries, laptop batteries, etc. used in our daily life all require tabs. Batteries have positive and negative electrodes, and the tabs are metal conductors that lead out the positive and negative electrodes from the battery cell. Generally speaking, the ears at the positive and negative poles of the battery are the contact points during charge and discharge.

[0003] The patent with the patent publication number CN215546329U discloses a new type of lithium battery tab welding device. The welding device includes a clamping mechanism, an adjusting mechanism, and a lithium battery body. The lithium battery body is located above the clamping mechanism, and the adjusting mechanism is located above the clamping mechanism. The clamping mechanism includes a fixed base, a welding table is fixedly connected to the top of the fixed base, two fixed blocks are fixedly connected to the top of the welding table, movable rods are movably connected to the inner sides of the two fixed blocks, annular springs are fixedly connected to the opposite sides of the two fixed blocks, movable clamping blocks are fixedly connected to the opposite ends of the two movable rods, silica gel pads are fixedly connected to the opposite sides of the two movable clamping blocks, and fixed pulling handles are fixedly connected to the opposite ends of the two movable rods. The overall structure of this welding device is simple and convenient to use, achieving the purpose of better clamping effect of the welding device and ensuring the welding effect of the lithium battery tabs. However, this welding device does not have the function of positioning the tabs. During welding, it is necessary to manually place the tabs on the lithium-ion battery, which may cause certain deviation in the welding position, thereby reducing the welding quality of the lithium-ion battery.

[0004] Therefore, it is necessary to design a welding device for the tabs of lithium-ion battery electrode sheets that can position the tabs and achieve precise welding. Summary of the Invention

[0005] In order to overcome the defect that the existing welding device does not have the function of positioning the tabs, and the welding position has a certain deviation due to the manual placement of the tabs, thereby reducing the welding quality of the lithium-ion battery, the purpose of the present invention is to provide a welding device for the tabs of lithium-ion battery electrode sheets that can position the tabs and achieve precise welding.

[0006] A lithium-ion battery electrode tab welding device, comprising a support frame, a storage battery, a laser welding machine, a positioning mechanism and a limiting mechanism. A storage battery capable of providing power is fixedly arranged at the top of the support frame. Laser welding machines capable of welding the electrode tabs are fixedly arranged symmetrically on the left and right of the upper part of the support frame. The laser welding machines are connected to the storage battery through electric wires. A positioning mechanism capable of positioning the electrode tabs is arranged on the support frame, and a limiting mechanism capable of limiting the lithium-ion battery is arranged at the lower part of the support frame.

[0007] In addition, particularly preferably, the positioning mechanism includes a fixed frame, a guide rail, a sliding frame, a positioning plate and a first elastic member. The fixed frame is fixedly arranged at the front part of the support frame. The guide rail is fixedly arranged at the middle position of the bottom of the fixed frame. The sliding frame is slidably arranged on the guide rail. The positioning plate capable of positioning the electrode tabs is fixedly arranged at the bottom of the sliding frame. A first elastic member is connected between the sliding frame and the inner part of the front of the guide rail.

[0008] In addition, particularly preferably, the limiting mechanism includes a fixed block, a sliding rod, a limiting block and a second elastic member. Fixed blocks are fixedly arranged on both the left and right sides of the lower part of the support frame. The sliding rod is slidably arranged on the fixed block. The limiting block capable of limiting the lithium-ion battery is fixedly arranged at the inner end of the sliding rod. A second elastic member is connected between the limiting block and the inner side of the adjacent fixed block. The second elastic member is sleeved on the sliding rod.

[0009] In addition, particularly preferably, it further includes a jacking mechanism capable of moving the limiting block away. The jacking mechanism includes a contact plate, a fixed sleeve and a push rod. The contact plate is fixedly arranged at the top of the limiting block. Fixed sleeves are fixedly arranged on both the left and right parts of the sliding frame. The push rod is fixedly arranged at the bottom of the fixed sleeve. The push rod will contact the contact plate when moving backward.

[0010] In addition, particularly preferably, it further includes a pulling mechanism capable of pulling the lithium-ion battery forward. The pulling mechanism includes a fixed rod and an arc-shaped block. Fixed rods are fixedly arranged symmetrically on the left and right of the rear part of the sliding frame. An arc-shaped block capable of pulling the lithium-ion battery is fixedly arranged between the adjacent left and right fixed rods.

[0011] In addition, particularly preferably, it further includes a pushing mechanism capable of pushing the lithium-ion battery for the staff to collect. The pushing mechanism includes a guide sleeve, a guide rod, a push plate and a third elastic member. Guide sleeves are fixedly arranged symmetrically on the left and right of the rear part of the support frame. The guide rod is slidably arranged on the guide sleeve. The push plate capable of pushing the lithium-ion battery forward is fixedly arranged between the front ends of the two guide rods. A third elastic member is connected between the rear side of the push plate and the front sides of the two guide sleeves. The third elastic member is sleeved on the guide rod.

[0012] In addition, it is particularly preferred that a protection mechanism is further included, which can block strong light and protect the eyes of the staff. The protection mechanism includes a support block and a protection plate. Support blocks are symmetrically and fixedly arranged on the left and right sides of the middle part of the support frame. A protection plate that can block strong light and prevent the strong light from stabbing the eyes of the staff is fixedly arranged between the two support blocks. Circular holes are symmetrically opened on the left and right sides of the upper part of the protection plate.

[0013] In addition, it is particularly preferred that the protection plate is a light-shielding plate.

[0014] From the above description of the structure of the present invention, the design starting point, concept and advantages of the present invention are as follows: 1. The staff inserts the two pole pieces into the left and right parts of the positioning plate. Under the action of the positioning plate, the pole pieces coincide with the places where the lithium-ion battery needs to be welded, so as to achieve the purpose of precise welding. The second elastic member resets to drive the limiting blocks to move towards each other and reset to limit the lithium-ion battery, preventing the lithium-ion battery from shifting during the welding process.

[0015] 2. By moving the push rod back and forth, the contact plate can be squeezed to move back and forth, so that it is no longer necessary to manually pull the sliding rod to make the limiting blocks move back and forth, thereby reducing the working intensity of the staff.

[0016] 3. By moving the arc-shaped block and the push plate forward, the welded lithium-ion battery can be pushed out, facilitating the staff to collect it.

[0017] 4. During the welding process, strong light will be generated. Under the action of the protection plate, the strong light can be blocked to prevent the staff from being stabbed in the eyes by the strong light. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structure diagram of the present invention.

[0019] Figure 2 It is a partial three-dimensional structure diagram of the present invention.

[0020] Figure 3 It is a first partial three-dimensional structure diagram of the positioning mechanism of the present invention.

[0021] Figure 4 It is a second partial three-dimensional structure diagram of the positioning mechanism of the present invention.

[0022] Figure 5 It is a three-dimensional structure diagram of the limiting mechanism of the present invention.

[0023] Figure 6 It is a three-dimensional structure diagram of the jacking mechanism of the present invention.

[0024] Figure 7 It is a three-dimensional structure diagram of the pulling mechanism of the present invention.

[0025] Figure 8 This is the first partial three-dimensional structural schematic diagram of the driving mechanism of the present invention.

[0026] Figure 9 This is the second partial three-dimensional structural schematic diagram of the driving mechanism of the present invention.

[0027] Figure 10 This is the three-dimensional structural schematic diagram of the protection mechanism of the present invention.

[0028] In the figure: 1, support frame; 2, storage battery; 3, laser welding machine; 4, positioning mechanism, 401, fixing frame, 402, guide rail, 403, sliding frame, 404, positioning plate, 405, first elastic member; 5, limiting mechanism, 501, fixing block, 502, sliding rod, 503, limiting block, 504, second elastic member; 6, ejecting mechanism, 601, contact plate, 602, fixing sleeve, 603, push rod; 7, pulling mechanism, 701, fixing rod, 702, arc-shaped block; 8, driving mechanism, 801, guide sleeve, 802, guide rod, 803, push plate, 804, third elastic member; 9, protection mechanism, 901, support block, 902, protection plate, 903, through hole. Specific embodiments

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0030] Embodiment 1

[0031] Please refer to Figures 1 - 5 , a lithium-ion battery electrode tab welding device, including a support frame 1, a storage battery 2, a laser welding machine 3, a positioning mechanism 4 and a limiting mechanism 5. The storage battery 2 is fixedly arranged at the top of the support frame 1, and the storage battery 2 can provide power. The laser welding machines 3 are fixedly arranged symmetrically on the left and right of the upper part of the support frame 1. The laser welding machine 3 can weld the electrode tabs, and the laser welding machine 3 is connected to the storage battery 2 through an electric wire. A positioning mechanism 4 is arranged on the support frame 1, and the positioning mechanism 4 can position the electrode tabs. A limiting mechanism 5 is arranged at the lower part of the support frame 1, and the limiting mechanism 5 can limit the lithium-ion battery.

[0032] Please refer to Figures 3 - 4 , the positioning mechanism 4 includes a fixing frame 401, a guide rail 402, a sliding frame 403, a positioning plate 404 and a first elastic member 405. The fixing frame 401 is welded to the front of the support frame 1. The guide rail 402 is fixedly arranged at the middle position of the bottom of the fixing frame 401. The sliding frame 403 is slidably arranged on the guide rail 402. The positioning plate 404 is fixedly arranged at the bottom of the sliding frame 403, and the positioning plate 404 can position the electrode tabs. A first elastic member 405 is connected between the sliding frame 403 and the front inner part of the guide rail 402.

[0033] Please refer to Figure 5 , the limiting mechanism 5 includes a fixed block 501, a sliding rod 502, a limiting block 503 and a second elastic member 504. Fixed blocks 501 are welded on both the left and right sides of the lower part of the support frame 1. A sliding rod 502 is slidably arranged on the fixed block 501. A limiting block 503 is fixedly arranged at the inner end of the sliding rod 502. The limiting block 503 can limit the lithium-ion battery. A second elastic member 504 is connected between the limiting block 503 and the inner side of the adjacent fixed block 501. The second elastic member 504 is sleeved on the sliding rod 502.

[0034] When it is necessary to weld the tabs of the lithium-ion battery electrode sheet, the staff places the lithium-ion battery at the rear position of the positioning plate 404. After placing it, the staff pulls the sliding rod 502 to slide backward. The backward sliding of the sliding rod 502 drives the limiting block 503 to move backward, and the second elastic member 504 is compressed accordingly. At this time, the staff pushes the sliding frame 403 to slide backward, and the first elastic member 405 is stretched accordingly. The backward sliding of the sliding frame 403 drives the positioning plate 404 to clamp the upper part of the lithium-ion battery. The sliding frame 403 continues to slide backward and drives the lithium-ion battery to move backward onto the support frame 1 through the positioning plate 404. The staff releases the sliding rod 502, and the second elastic member 504 then resets to drive the limiting block 503 to move toward each other and reset to limit the lithium-ion battery, preventing the lithium-ion battery from shifting during the welding process. After the limiting is completed, the staff inserts two pole pieces into the left and right parts of the positioning plate 404. Under the action of the positioning plate 404, the pole pieces coincide with the places on the lithium-ion battery that need to be welded. At this time, the staff starts the laser welding machine 3 and powers the laser welding machine 3 through the storage battery 2. Under the action of the operation of the laser welding machine 3, the tabs are welded onto the lithium-ion battery. After the welding is completed, the staff turns off the laser welding machine 3 to stop operating. Then the staff releases the sliding frame 403, and the first elastic member 405 then resets to drive the positioning plate 404 to slide forward and reset. Then the staff pulls the sliding rod 502 to slide backward again. The backward sliding of the sliding rod 502 drives the limiting block 503 to move backward, and the second elastic member 504 is compressed accordingly. The backward movement of the limiting block 503 no longer limits the lithium-ion battery. At this time, the staff takes out the lithium-ion battery that has completed the welding operation for collection. After taking it out, the staff releases the sliding rod 502, and the second elastic member 504 then resets to drive the limiting block 503 to move toward each other and reset.

[0035] Embodiment 2

[0036] Please refer to Figure 1 and Figure 6, on the basis of Embodiment 1, it further includes a jacking mechanism 6. The jacking mechanism 6 can make the limiting block 503 move backward. The jacking mechanism 6 includes a contact plate 601, a fixed sleeve 602 and a push rod 603. The contact plate 601 is welded to the top of the limiting block 503. Fixed sleeves 602 are fixedly arranged on the left and right sides of the sliding frame 403. A push rod 603 is fixedly arranged at the bottom of the fixed sleeve 602. When the push rod 603 moves backward, it will contact the contact plate 601.

[0037] Please refer to Figure 1 and Figure 7 , it further includes a pulling mechanism 7. The pulling mechanism 7 can pull the lithium-ion battery forward. The pulling mechanism 7 includes a fixed rod 701 and an arc-shaped block 702. Fixed rods 701 are symmetrically welded to the left and right sides of the rear part of the sliding frame 403. An arc-shaped block 702 is fixedly arranged between two adjacent left and right fixed rods 701. The arc-shaped block 702 can pull the lithium-ion battery.

[0038] Please refer to Figure 1 , Figure 8 and Figure 9 , it further includes a pushing mechanism 8. The pushing mechanism 8 can push the lithium-ion battery for the staff to collect. The pushing mechanism 8 includes a guide sleeve 801, a guide rod 802, a push plate 803 and a third elastic member 804. Guide sleeves 801 are symmetrically and fixedly arranged on the left and right sides of the rear part of the support frame 1. A guide rod 802 is slidably arranged on the guide sleeve 801. A push plate 803 is fixedly arranged between the front ends of the two guide rods 802. The push plate 803 can push the lithium-ion battery forward. A third elastic member 804 is connected between the rear side of the push plate 803 and the front sides of the two guide sleeves 801. The third elastic member 804 is sleeved on the guide rod 802.

[0039] The sliding carriage 403 slides backward, pushing the lithium-ion battery backward through the positioning plate 404 to the support frame 1. As the lithium-ion battery moves backward, it squeezes the push plate 803 to move backward, and the third elastic member 804 is compressed accordingly. The backward movement of the push plate 803 drives the guide rod 802 to slide backward. At the same time, the backward sliding of the sliding carriage 403 drives the push rod 603 to move backward through the fixed sleeve 602. The backward movement of the push rod 603 squeezes the contact plate 601 to move away. The backward movement of the contact plate 601 drives the limit block 503 to move away. When the push rod 603 stops squeezing the contact plate 601 during its backward movement, the limit block 503 moves back to its original position under the action of the second elastic member 504, and the contact plate 601 moves back to its original position accordingly. At this time, the limit plate limits the lithium-ion battery. When the sliding carriage 403 slides forward to reset and drives the push rod 603 to move forward through the fixed sleeve 602, the forward movement of the push rod 603 squeezes the contact plate 601 to move away, and the backward movement of the contact plate 601 drives the limit block 503 to move away, no longer limiting the lithium-ion battery. At this time, the sliding carriage 403 continues to slide forward, driving the positioning plate 404 to move forward. The forward movement of the positioning plate 404 drives the arc-shaped block 702 to move forward through the fixed rod 701. At the same time, the third elastic member 804 resets, driving the push plate 803 to move forward and reset, squeezing the lithium-ion battery to move forward. The forward movement of the push plate 803 drives the guide rod 802 to slide forward and reset. The forward movement of the arc-shaped block 702 and the push plate 803 can push out the welded lithium-ion battery, facilitating the collection by the staff. When the push rod 603 stops squeezing the contact plate 601 during its forward movement, the limit block 503 moves back to its original position under the action of the second elastic member 504.

[0040] Please refer to Figure 1 and Figure 10 There is also a protection mechanism 9. The protection mechanism 9 can block strong light and protect the eyes of the staff. The protection mechanism 9 includes a support block 901 and a protection plate 902. The support blocks 901 are symmetrically and fixedly arranged on the left and right sides in the middle of the support frame 1. A protection plate 902 is fixedly arranged between the two support blocks 901. The protection plate 902 can block strong light and prevent the strong light from hurting the eyes of the staff. The protection plate 902 is a light-shielding plate, and circular holes are symmetrically opened in the upper part of the protection plate 902.

[0041] The operation of the laser welding machine 3 enables the laser ray to pass through the through hole 903 to weld the ear on the lithium-ion battery. During the process of the protection plate 902, it can prevent debris from splashing. During the welding process, strong light will be generated, and long-term viewing by the staff will cause damage to the eyes. Since the protection plate 902 is a light-shielding plate, it can block strong light and prevent the staff from being stabbed in the eyes by the strong light.

[0042] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made according to the content described in the claims of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A lithium-ion battery electrode tab welding device, comprising a support frame (1), a storage battery (2) and a laser welding machine (3). A storage battery (2) capable of providing power is fixedly arranged at the top of the support frame (1). Laser welding machines (3) capable of welding the electrode tabs are fixedly arranged symmetrically on the left and right of the upper part of the support frame (1). The laser welding machines (3) are connected to the storage battery (2) through electric wires. It is characterized in that, It further includes a positioning mechanism (4) and a limiting mechanism (5). A positioning mechanism (4) capable of positioning the tab is provided on the support frame (1), and a limiting mechanism (5) capable of limiting the lithium-ion battery is provided at the lower part of the support frame (1); The positioning mechanism (4) includes a fixed frame (401), a guide rail (402), a sliding frame (403), a positioning plate (404) and a first elastic member (405). The fixed frame (401) is fixedly arranged at the front part of the support frame (1). The guide rail (402) is fixedly arranged at the middle position of the bottom of the fixed frame (401). The sliding frame (403) is slidably arranged on the guide rail (402). The positioning plate (404) capable of positioning the tab is fixedly arranged at the bottom of the sliding frame (403). A first elastic member (405) is connected between the sliding frame (403) and the inner part of the front of the guide rail (402); The limiting mechanism (5) includes a fixed block (501), a sliding rod (502), a limiting block (503) and a second elastic member (504). Fixed blocks (501) are fixedly arranged on both the left and right sides of the lower part of the support frame (1). The sliding rod (502) is slidably arranged on the fixed block (501). The limiting block (503) capable of limiting the lithium-ion battery is fixedly arranged at the inner end of the sliding rod (502). A second elastic member (504) is connected between the limiting block (503) and the inner side of the adjacent fixed block (501). The second elastic member (504) is sleeved on the sliding rod (502); It further includes a jacking mechanism (6) capable of moving the limiting block (503) in the opposite direction. The jacking mechanism (6) includes a contact plate (601), a fixed sleeve (602) and a push rod (603). The contact plate (601) is fixedly arranged at the top of the limiting block (503). Fixed sleeves (602) are fixedly arranged on both the left and right parts of the sliding frame (403). The push rod (603) is fixedly arranged at the bottom of the fixed sleeve (602). The push rod (603) will contact the contact plate (601) when moving backward; It further includes a pulling mechanism (7) capable of pulling the lithium-ion battery forward. The pulling mechanism (7) includes a fixed rod (701) and an arc-shaped block (702). Fixed rods (701) are symmetrically fixedly arranged on both the left and right sides of the rear part of the sliding frame (403). An arc-shaped block (702) capable of pulling the lithium-ion battery is fixedly arranged between the adjacent left and right fixed rods (701); It further includes a pushing mechanism (8) capable of pushing the lithium-ion battery for the staff to collect. The pushing mechanism (8) includes a guide sleeve (801), a guide rod (802), a push plate (803) and a third elastic member (804). Guide sleeves (801) are symmetrically fixedly arranged on both the left and right sides of the rear part of the support frame (1). The guide rod (802) is slidably arranged on the guide sleeve (801). The push plate (803) capable of pushing the lithium-ion battery forward is fixedly arranged between the front ends of the two guide rods (802). A third elastic member (804) is connected between the rear side of the push plate (803) and the front sides of the two guide sleeves (801). The third elastic member (804) is sleeved on the guide rod (802).

2. The lithium-ion battery electrode tab welding device according to claim 1, wherein It further includes a protection mechanism (9) capable of blocking strong light and protecting the eyes of the staff. The protection mechanism (9) includes a support block (901) and a protection plate (902). Support blocks (901) are symmetrically and fixedly arranged on the left and right in the middle of the support frame (1). A protection plate (902) capable of blocking strong light and preventing the strong light from stabbing the eyes of the staff is fixedly arranged between the two support blocks (901). Circular holes are symmetrically opened on the left and right in the upper part of the protection plate (902).

3. The lithium-ion battery electrode tab welding device according to claim 2, characterized in that, The protection plate (902) is a light-shielding plate.

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