Pole lug correcting device for square-shell lithium ion battery

Abstract

The utility model discloses a pole lug correcting device for a square-shell lithium ion battery. The two ends of the top surface of a lithium battery core package placing platform are used for placing lithium battery core packages; the lithium battery core package placing platform is mounted in the middle of the top surface of the lithium battery core package tray, and cylinders with guide rails are mounted on the lithium battery core package tray at the two ends of the lithium battery core package placing platform and used for pushing lithium battery core packages to the middle of the lithium battery core package placing platform through the cylinders with the guide rails; tab flattening lines are arranged in the middles of the lithium battery core bag placing platforms at the ends, close to each other, of the two lithium battery core bags, and tabs of the lithium battery core bags are in lap joint with the corresponding tab flattening lines. According to the utility model, the problems of missing welding and partial welding of a certain layer of the multi-layer tabs of the lithium battery core can be solved, the manpower and detection cost is reduced, the capacity and various related electrochemical properties of the lithium ion battery are ensured, the processing difficulty of enterprises is solved, and the worries of mileage and safety of consumers are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of production of square shell lithium ion battery tab ultrasonic welding, and in particular relates to a square shell lithium ion battery tab correction device. Background Art

[0002] As one of the greatest inventions of the 20th century, lithium-ion batteries are widely used in all aspects of human life, such as food, clothing, housing, and transportation, due to their advantages such as high specific energy, long cycle life, no memory, and low self-discharge rate. Electric vehicles (electric vehicles, electric bicycles, electric ships, and electric rails) will also be further developed, which is undoubtedly a huge opportunity for lithium-ion batteries. However, along with the huge opportunities, the requirements for the endurance and safety of lithium-ion batteries are also getting higher and higher. Ultrasonic welding is a key processing step for connecting multi-layer tabs and pole pieces in the production process of lithium-ion batteries. Its welding quality will also directly affect the key characteristic capacity of the battery. Under the current various testing instruments, it is impossible to effectively detect the defects of tab leakage and biased welding 100%, which also indicates that the capacity of lithium-ion batteries will be affected to a greater or lesser extent. How to ensure that the tabs and pole pieces are fully and completely welded together without leakage in the ultrasonic welding process has become a difficult problem faced by lithium battery manufacturers. Utility Model Content

[0003] The utility model aims to provide a square shell lithium ion battery tab correction device to solve the above problems existing in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A square shell lithium-ion battery tab correction device comprises a lithium battery core pack tray, a lithium battery core pack placement platform, a tab smoothing line and a cylinder with a guide rail, wherein the two ends of the top surface of the lithium battery core pack placement platform are used to place the lithium battery core packs; the lithium battery core pack placement platform is installed in the middle of the top surface of the lithium battery core pack tray, and the lithium battery core pack trays at both ends of the lithium battery core pack placement platform are both installed with cylinders with guide rails, so as to push the lithium battery core packs to the middle of the lithium battery core pack placement platform through the cylinders with guide rails; the middle of the lithium battery core pack placement platform near one end of two lithium battery core packs is provided with a tab smoothing line, and the tabs of each lithium battery core pack are overlapped on the corresponding tab smoothing line.

[0006] As a preferred technical solution in the utility model, the guide rail cylinder includes cylinder rails extending along the two ends of the lithium battery cell pack placement platform and a sliding cylinder slidably connected to the cylinder rails, so as to push the lithium battery cell pack to the middle of the lithium battery cell pack placement platform by sliding the sliding cylinder on the cylinder rails.

[0007] As a preferred technical solution in the utility model, a battery cell pack push plate is installed at one end of each sliding cylinder close to the lithium battery cell pack.

[0008] As a preferred technical solution in the utility model, a silicone insulating soft material is fixed on one side of the battery core pack push plate facing the lithium battery core pack.

[0009] As a preferred technical solution in the utility model, both ends of each tab smoothing line are connected to the tab smoothing line fixing columns, and the two tab smoothing line fixing columns are respectively fixed on the lithium battery core pack trays on both sides of the lithium battery core pack placement platform.

[0010] As a preferred technical solution in the utility model, at least two lithium battery core pack positioning devices are provided at both ends of the lithium battery core pack placement platform, and the lithium battery core pack positioning devices located at the same end of the lithium battery core pack placement platform are respectively located on both sides of the cylinder track.

[0011] Beneficial effect: When the square shell lithium-ion battery tab correction device is actually used, when the stacked or wound lithium battery core pack is transferred to the ultrasonic welding station through the lithium battery core pack tray, the lithium battery core pack is grabbed by a robot and placed on the lithium battery core pack placement platform. During the falling process of the core pack, the position at half the length of the tab of the lithium battery core pack will pass through the tab smoothing line, and the drooping tab part will be straightened by the tab smoothing line to be flat. When the lithium battery core pack falls onto the lithium battery core pack placement platform, the guide cylinders on both sides work, and the action of the guide cylinders pushes the two lithium battery core packs to move a certain displacement towards each other. At this time, the multi-layer tabs of the lithium battery core pack are corrected and are in a stacked state. When the stacked or wound lithium battery core pack is transferred to the ultrasonic welding station through the lithium battery core pack tray, it can be adjusted with the square shell lithium-ion battery ear correction device to solve the problem of welding leakage and biased welding of a certain layer of the multi-layer ear of the lithium battery core pack, reduce manpower and testing costs, ensure the capacity of the lithium-ion battery and various related electrochemical properties, solve the processing problems of the enterprise, and solve the mileage and safety concerns of consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the tab of a lithium battery core pack before being corrected;

[0014] Figure 3 This is a schematic diagram of the lithium battery core pack after the tabs are corrected.

[0015] In the figure: 1-lithium battery core pack tray; 2-lithium battery core pack placement platform; 3-ear tab smoothing line; 4-lithium battery core pack; 5-cylinder track; 6-sliding cylinder; 7-cell pack push plate; 8-ear tab smoothing line fixing column; 9-lithium battery core pack positioning device. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0017] Example:

[0018] like Figure 1 As shown, the present embodiment provides a square shell lithium-ion battery tab correction device, comprising a lithium battery core pack tray 1, a lithium battery core pack placement platform 2, a tab smoothing line 3 and a cylinder with a guide rail, the two ends of the top surface of the lithium battery core pack placement platform 2 are used to place the lithium battery core pack 4; the lithium battery core pack placement platform 2 is installed in the middle of the top surface of the lithium battery core pack tray 1, and the lithium battery core pack tray 1 at both ends of the lithium battery core pack placement platform 2 is installed with a cylinder with a guide rail, which is used to push the lithium battery core pack 4 to the middle of the lithium battery core pack placement platform 2 through the cylinder with a guide rail, so as to facilitate the correction of the tabs of the lithium battery core pack 4 by pushing the lithium battery core pack 4 to move; the middle of the lithium battery core pack placement platform 2 at one end of the two lithium battery core packs 4 close to each other is provided with a tab smoothing line 3, and the tabs of each lithium battery core pack 4 are overlapped on the corresponding tab smoothing line 3, so that the tab part of the lithium battery core pack 4 that is lying down is straightened by the tab smoothing line 3 to be flat.

[0019] When the square shell lithium-ion battery tab correction device is actually used, when the stacked or wound lithium battery core pack 4 is transferred to the ultrasonic welding station through the lithium battery core pack tray 1, the lithium battery core pack 4 is grabbed by a robot and placed on the lithium battery core pack placement platform 2. During the falling process of the core pack, the position of half the length of the tab of the lithium battery core pack 4 will pass through the tab smoothing line 3, and the drooping tab part will be straightened by the tab smoothing line 3 to be flat. When the lithium battery core pack 4 falls onto the lithium battery core pack placement platform 2, the cylinders with guide rails on both sides work, and the action of the cylinders with guide rails pushes the two lithium battery core packs 4 to move a certain displacement in the direction close to each other. At this time, the multi-layer tabs of the lithium battery core pack 4 are corrected and present a stacked state. When the stacked or wound lithium battery core pack 4 is transferred to the ultrasonic welding station through the lithium battery core pack tray 1, it can be adjusted with the square shell lithium ion battery ear correction device to solve the problem of welding leakage and biased welding of a certain layer of the multi-layer ears of the lithium battery core pack 4, reduce manpower and detection costs, ensure the capacity of the lithium ion battery and various related electrochemical properties, solve the processing problems of the enterprise, and solve the mileage and safety concerns of consumers.

[0020] It should be noted that if Figure 2 As shown, the lithium battery core pack 4 has a tab drooping state before correction. Figure 3 The lithium battery core pack 4 is corrected by using the square shell lithium ion battery tab correcting device.

[0021] As a preferred implementation scheme in this embodiment, it needs to be further explained that the guide rail cylinder includes a cylinder rail 5 extending along the two ends of the lithium battery cell pack placement platform 2 and a sliding cylinder 6 slidably connected to the cylinder rail 5. The cylinder rail 5 can support the sliding cylinder 6 without deviation during operation, and can effectively prevent the push plate from damaging the lithium battery cell pack after deviation. This is no different from the prior art. The lithium battery cell pack 4 is pushed to the middle of the lithium battery cell pack placement platform 2 by sliding the sliding cylinder 6 on the cylinder rail 5. The existing guide rail cylinder can be used, and the equipment is mature and the structure is stable.

[0022] As a preferred implementation scheme in this embodiment, it needs to be further explained that a battery pack push plate 7 is installed at one end of each sliding cylinder 6 close to the lithium battery cell pack 4 to ensure that the sliding cylinder 6 can accurately push the lithium battery cell pack 4 to the specified position using the battery pack push plate 7 during the sliding process.

[0023] As a preferred implementation scheme in this embodiment, it needs to be further explained that a silicone insulating soft material is fixed on the side of the battery cell pack push plate 7 facing the lithium battery cell pack 4 to prevent the push plate from damaging the lithium battery cell pack 4 during movement.

[0024] As a preferred implementation scheme in this embodiment, it needs to be further explained that both ends of each pole tab smoothing line 3 are connected to the pole tab smoothing line fixing columns 8, and the two pole tab smoothing line fixing columns 8 are respectively fixed on the lithium battery core pack tray 1 on both sides of the lithium battery core pack placement platform 2, to ensure the stability of the pole tab smoothing line 3 and provide positioning for the pole tab smoothing line 3. Preferably, the pole tab smoothing line fixing columns 8 are detachably connected to the lithium battery core pack tray 1 by plugging and the like, and can be compatible with lithium battery core packs 4 of different sizes, thereby improving the production conversion efficiency of the enterprise.

[0025] As a preferred implementation scheme in this embodiment, it needs to be further explained that at least two lithium battery cell pack positioning devices 9 are provided at both ends of the lithium battery cell pack placement platform 2, and the lithium battery cell pack positioning devices 9 located at the same end of the lithium battery cell pack placement platform 2 are respectively located on both sides of the cylinder track 5, which will not affect the functioning of the cylinder with guide rails. At the same time, when the lithium battery cell pack 4 is placed on the lithium battery cell pack placement platform 2, the lithium battery cell pack 4 can be positioned, so that the placement position of the lithium battery cell pack 4 is more accurate, and at the same time, it can also prevent the lithium battery cell pack 4 from moving when the entire equipment moves to the next process on the assembly line.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A square shell lithium ion battery tab correction device, characterized in that: The invention comprises a lithium battery core pack tray (1), a lithium battery core pack placement platform (2), a tab smoothing line (3) and a cylinder with a guide rail, wherein the two ends of the top surface of the lithium battery core pack placement platform (2) are used to place lithium battery core packs (4); the lithium battery core pack placement platform (2) is installed in the middle of the top surface of the lithium battery core pack tray (1), and the lithium battery core pack tray (1) at both ends of the lithium battery core pack placement platform (2) is installed with a cylinder with a guide rail, so as to push the lithium battery core pack (4) to the middle of the lithium battery core pack placement platform (2) through the cylinder with a guide rail; the middle of the lithium battery core pack placement platform (2) near one end of two lithium battery core packs (4) is provided with a tab smoothing line (3), and the tab of each lithium battery core pack (4) is overlapped on the corresponding tab smoothing line (3).

2. The apparatus for correcting the tabs of a square-shell lithium-ion battery according to claim 1, characterized in that: The guide rail cylinder comprises a cylinder rail (5) extending along the two ends of the lithium battery core pack placement platform (2) and a sliding cylinder (6) slidably connected to the cylinder rail (5), so as to push the lithium battery core pack (4) to the middle of the lithium battery core pack placement platform (2) by sliding the sliding cylinder (6) on the cylinder rail (5).

3. The square shell lithium ion battery tab correction device according to claim 2, characterized in that: A battery pack push plate (7) is installed at one end of each sliding cylinder (6) close to the lithium battery pack (4).

4. The square shell lithium ion battery tab correction device according to claim 3, characterized in that: A silicone insulating soft material is fixed on one side of the battery pack push plate (7) facing the lithium battery pack (4).

5. The square shell lithium ion battery tab correction device according to claim 1, characterized in that: Both ends of each tab smoothing line (3) are connected to tab smoothing line fixing columns (8), and the two tab smoothing line fixing columns (8) are respectively fixed on the lithium battery core pack tray (1) on both sides of the lithium battery core pack placement platform (2).

6. The square shell lithium ion battery tab correction device according to claim 1, characterized in that: At least two lithium battery core pack positioning devices (9) are provided at both ends of the lithium battery core pack placement platform (2), and the lithium battery core pack positioning devices (9) located at the same end of the lithium battery core pack placement platform (2) are respectively located on both sides of the cylinder track (5).

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