Device capable of carrying out double-roll coating on lithium battery diaphragm

Abstract

The utility model provides a device capable of carrying out double-roll coating on a lithium battery diaphragm. The device comprises a rolling shaft A, a rolling shaft B and a coating roll core, the winding shaft A and the winding shaft B are coaxially arranged and are positioned below the coating winding core; a roll A connecting chuck is arranged at the end part of the rolling shaft A; a roll B connecting chuck is arranged at the end part of the rolling shaft B; the roll A connecting chuck and the roll B connecting chuck are rotationally meshed and then are detachably fixed together through a fixing device; the winding shaft A is connected with an A roll of membrane material diaphragm, and the winding shaft B is connected with a B roll of membrane material diaphragm; and the other ends of the A roll of membrane material diaphragm and the B roll of membrane material diaphragm are wound on the coating roll core. According to the utility model, after double rolls of lithium battery diaphragms with the breadth of 400-650 mm are coated, the two rolls of diaphragms are respectively and synchronously wound on the two coating roll cores, so that the energy consumption is reduced, the production efficiency of the coating machine is improved by two times under the same time, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery diaphragm production equipment, in particular to a device capable of performing double-roll coating of lithium battery diaphragms. Background Art

[0002] In recent years, with the development of lithium-ion battery separator industry, people's requirements for lithium-ion battery separator production efficiency and separator quality are also constantly improving. In order to improve efficiency in the wet-process separator production process, existing separator production enterprises widen the separator production line, and the winding width is also wider and wider, and then a secondary coating is performed to improve the coating production efficiency and equipment utilization rate. However, because the separator width is getting wider and wider, it is easy to cause the separator appearance quality to decline and degrade when the main line is wound, so a considerable part of the separator winding will be cut into 400-650mm width. At present, in order to improve the coating production efficiency in the existing industry, the coating width of the mainstream coating equipment of the separator coating machine is 600-1300mm wide. When coating and producing separators with a width of 400-650mm, only single roll coating can be performed, which will affect the production utilization rate of the wide-width coating machine when coating and producing 400-650mm width. In order to solve the problem of double-roll synchronous coating of lithium battery separators with a width of 400-650 mm, we proposed a device for double-roll coating of lithium battery separators. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a device for double-roll coating of lithium battery separators. It can improve the coating efficiency of existing separators with a width of 400-650mm, avoid the loss of production efficiency caused by coating separators with a width of 400-650mm and only single-roll coating, thereby improving the overall equipment production utilization efficiency, increasing production capacity and reducing production costs.

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

[0005] A device capable of performing double-roll coating of lithium battery diaphragms comprises a winding shaft A, a winding shaft B and a coating core; the winding shaft A and the winding shaft B are coaxially arranged and located below the coating core; an A-roll connecting chuck is provided at the end of the winding shaft A; a B-roll connecting chuck is provided at the end of the winding shaft B, and the A-roll connecting chuck and the B-roll connecting chuck are detachably fixed together by a fixing device after rotational engagement; the A-roll film diaphragm is connected to the winding shaft A, and the B-roll film diaphragm is connected to the winding shaft B; the other ends of the A-roll film diaphragm and the B-roll film diaphragm are both covered on the coating core.

[0006] As a further improvement of this solution, the fixing device is a coupling.

[0007] As a further improvement of this solution, the fixing device is a cylindrical pipe clamp.

[0008] As a further improvement of this solution, the end of the reel A away from the A roll connecting chuck is fixed to the transmission device through a bearing fixing seat 1; the end of the reel B away from the B roll connecting chuck is fixed to the other end of the transmission device through a bearing fixing seat 2.

[0009] As a further improvement of the present solution, the width of the A roll film material diaphragm and the B roll film material diaphragm is 400-650 mm.

[0010] As a further improvement of the present solution, the winding shaft A and the winding shaft B have the same diameter.

[0011] As a further improvement of the present solution, the A roll connecting chuck and the B roll connecting chuck have the same diameter after being engaged at the fixing device.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model realizes double-roll coating of lithium battery diaphragm with a width of 400-650 mm, and the two rolls of diaphragm are synchronously collected on two coating cores respectively, which reduces energy consumption, increases the production efficiency of the coating machine by 2 times in the same time, reduces production costs, and the rotating shafts of the two coating cores are detachable, which can be used for single-roll operation or double-roll synchronization, and has better adaptability for use in workshops. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the fixing structure of the connecting clamp of the utility model;

[0017] Figure 4 This is a schematic diagram of the disassembly of a connecting chuck in an embodiment of the utility model that is fixed with a cylindrical pipe clamp.

[0018] Markings in the figure: 1-bearing fixing seat 1; 2-bearing fixing seat 2; 3-A roll film material diaphragm; 4-B roll film material diaphragm; 5-A roll connecting chuck; 6-fixing device; 7-B roll connecting chuck; 8-coating roll core; 31-reeling shaft A; 41-reeling shaft B. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0020] Example 1

[0021] like Figure 1-3 As shown, the present embodiment provides a device capable of performing double-roll coating of lithium battery diaphragms, comprising a winding shaft A 31, a winding shaft B 41 and a coating core 8; the winding shaft A 31 and the winding shaft B 41 are coaxially arranged and located below the coating core 8; an A-roll connecting clamp 5 is provided at the end of the winding shaft A 31; a B-roll connecting clamp 7 is provided at the end of the winding shaft B 41, and the A-roll connecting clamp 5 and the B-roll connecting clamp 7 are detachably fixed together by a fixing device 6 after being rotated and engaged; the A-roll film material diaphragm 3 is connected to the winding shaft A 31, and the B-roll film material diaphragm 4 is connected to the winding shaft B 41; the other ends of the A-roll film material diaphragm 3 and the B-roll film material diaphragm 4 are both covered on the coating core 8.

[0022] The fixing device 6 in this embodiment is a cylindrical pipe clamp, which is used to fix the A roll connection clamp 5 and the B roll connection clamp 7 after rotational engagement; when disassembling, the cylindrical pipe clamp is loosened to separate the A roll connection clamp 5 and the B roll connection clamp 7 so that they can be rolled separately. The A roll connection clamp 5 and the B roll connection clamp 7 have the same diameter after engagement at the fixing device 6.

[0023] The end of the reel A 31 away from the A roll connection chuck 5 is fixed to the transmission device through a bearing fixing seat 1; the end of the reel B 41 away from the B roll connection chuck 7 is fixed to the other end of the transmission device through a bearing fixing seat 2. The width of the A roll film material diaphragm 3 and the B roll film material diaphragm 4 is 400-650 mm, and the reel A 31 and the reel B 41 have the same diameter.

[0024] In this embodiment, in order to improve the coating production efficiency in the existing industry, the coating width of the mainstream coating equipment of the diaphragm coating machine is 600-1300mm wide. When coating and producing diaphragms with a width of 400-650 mm, only single-roll coating can be performed. In order to solve the problem of synchronous winding of double rolls, two 400-650 mm wide lithium battery diaphragms are coated from the coating roll core 8, and then the A roll connecting chuck 5 is fixed at the front end of the winding shaft A 31, and the B roll connecting chuck 7 is fixed at the front end of the winding shaft B 41; the A roll connecting chuck 5 and the B roll connecting chuck 7 are rotated and engaged, and then detachably fixed together by the cylindrical pipe clamp of the fixing device 6; at this time, the two ends of the winding shaft A 31 and the winding shaft B 41 are respectively driven to rotate by the bearing fixing seat 1 and the bearing fixing seat 2 2, thereby realizing 400-650 After double-roll coating of mm-width lithium battery diaphragm, the two rolls of diaphragm are synchronously collected on two coating cores, which reduces energy consumption, increases the production efficiency of the coating machine by 2 times in the same time, and reduces production costs.

[0025] Example 2

[0026] The structures of this embodiment are basically the same as those of the first embodiment, except that the fixing device 6 in this embodiment adopts a coupling. When a coupling is adopted, the A-roll connecting chuck 5 and the B-roll connecting chuck 7 do not need to adopt a rotating meshing structure, and only the A-roll connecting chuck 5 and the B-roll connecting chuck 7 need to be fixed to the two ends of the coupling respectively. However, it is necessary to ensure that the A-roll connecting chuck 5 and the B-roll connecting chuck 7 have the same diameter and synchronize their rotation speeds.

[0027] The above contents are merely examples of the structure of the present utility model. The technical personnel in the relevant technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A device capable of performing double-roll coating of lithium battery separators, comprising a winding shaft A (31), a winding shaft B (41) and a coating core (8); characterized in that: The reel A (31) and the reel B (41) are coaxially arranged and located below the coating core (8); an A-roll connecting chuck (5) is provided at the end of the reel A (31); a B-roll connecting chuck (7) is provided at the end of the reel B (41); the A-roll connecting chuck (5) and the B-roll connecting chuck (7) are detachably fixed together by a fixing device (6) after being rotated and engaged; the reel A (31) is connected to the A-roll film diaphragm (3), and the reel B (41) is connected to the B-roll film diaphragm (4); the other ends of the A-roll film diaphragm (3) and the B-roll film diaphragm (4) are both covered on the coating core (8).

2. The device for double-roll coating of lithium battery separator according to claim 1, characterized in that: The fixing device (6) is a coupling.

3. The device for double-roll coating of lithium battery separator according to claim 1, characterized in that: The fixing device (6) is a cylindrical pipe clamp.

4. The device for double-roll coating of lithium battery separator according to claim 1, characterized in that: One end of the reeling shaft A (31) away from the A-roll connecting chuck (5) is fixed to the transmission device via a first bearing fixing seat (1); and one end of the reeling shaft B (41) away from the B-roll connecting chuck (7) is fixed to the other end of the transmission device via a second bearing fixing seat (2).

5. The device for double-roll coating of lithium battery separator according to claim 1, characterized in that: The width of the A roll film material diaphragm (3) and the B roll film material diaphragm (4) is 400-650 mm.

6. The device for double-roll coating of lithium battery separator according to claim 1, characterized in that: The reel A (31) and reel B (41) have the same diameter.

7. The device for double-roll coating of lithium battery separator according to claim 1, characterized in that: The A-roll connecting chuck (5) and the B-roll connecting chuck (7) have the same diameter after being engaged at the fixing device (6).

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