Battery diaphragm coating equipment

Abstract

The utility model discloses battery diaphragm coating equipment which comprises a bottom frame and two bearing plates which are arranged on the bottom frame at intervals, and a plurality of cross brace connecting pipes are arranged between the two bearing plates at intervals; a first transition roller, a second transition roller, an adsorption roller, a tension roller, an arc-shaped roller, an adjusting roller and a back roller which are arranged in the moving direction of the diaphragm are installed between the two bearing plates. The adsorption roller is connected with a power mechanism, and the back roller is connected with a first driving mechanism; the bearing plate is provided with a first adjusting mechanism used for adjusting the shaping angle of the arc-shaped roller, and the bearing plate is provided with a second adjusting mechanism used for adjusting the height difference of the two ends of the adjusting roller. The two bearing plates are further provided with a slurry transferring and feeding mechanism used for transferring slurry and coating the slurry on the diaphragm in cooperation with the back roller. A diaphragm is leveled in the process of moving from an unwinding position to a back roller position, and the coating uniformity is met.

Description

Technical Field

[0001] The utility model relates to the technical field of battery diaphragm coating equipment, in particular to a battery diaphragm coating equipment. Background Art

[0002] During the charge and discharge process of lithium-ion batteries, the separator separates the positive and negative electrodes, preventing contact and short circuits. It also absorbs sufficient electrolyte, provides ample electrolyte and lithium ion channels, and provides micropore self-sealing protection. The separator's lithium ion conductivity is directly related to the overall performance of the lithium-ion battery. The separator's performance determines the battery's interface structure, electrolyte retention, and internal resistance, which in turn affects key battery characteristics such as capacity, cycle performance, charge and discharge current density, and safety. Separators can also be coated to achieve higher heat resistance or liquid absorption, further improving battery safety.

[0003] The coating process includes the slurry loading and transferring process composed of anilox roller, plate roller, etc. and the diaphragm feeding process composed of unwinding mechanism, guide roller and back roller, etc. When the slurry is transferred to the back roller position, the slurry is coated on the diaphragm passing through the back roller to complete the diaphragm coating.

[0004] During the process of the diaphragm moving from the unwinding position to the backing roller, the diaphragm may have wrinkles, which affects the coating uniformity. Utility Model Content

[0005] (1) Technical issues

[0006] The purpose of the utility model is to provide a battery diaphragm coating device to solve the problem that the diaphragm is wrinkled during the process of moving from the unwinding position to the back roller and needs to be flattened.

[0007] (2) Technical solution

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A battery diaphragm coating device comprises a base frame and two supporting plates installed on the base frame at intervals, with a plurality of cross-bracing connecting tubes arranged at intervals between the two supporting plates; a first transition roller, a second transition roller, an adsorption roller, a tension roller, an arc roller, an adjustment roller and a back roller arranged along the moving direction of the diaphragm are installed between the two supporting plates; a power mechanism is connected to the adsorption roller, and a first driving mechanism is connected to the back roller; a first adjusting mechanism for adjusting the shaping angle of the arc roller is installed on the supporting plate, and a second adjusting mechanism for adjusting the height difference between the two ends of the adjustment roller is installed on the supporting plate; a slurry transfer and loading mechanism for transferring slurry and cooperating with the back roller to coat it on the diaphragm is also provided on the two supporting plates.

[0010] Preferably, the second adjustment mechanism includes a mounting block mounted on the supporting plate, the mounting block is provided with a sliding guide rail and a sliding block mounted on the sliding guide rail, and the adjustment roller is rotatably mounted on the sliding block; the mounting block is provided with a second driving mechanism for adjusting the sliding block relative to the sliding guide rail.

[0011] Preferably, the second driving mechanism includes a driving screw rotatably mounted on the mounting block, the driving screw being threadedly connected to the sliding block; and a rotary driving member is connected to the driving screw.

[0012] Preferably, the rotary drive member is a manual rotary knob, and a rotation-stop adjustment member is provided on the manual rotary knob.

[0013] Preferably, the rotary driving member is a rotary motor, and the mounting block is provided with a detection sensor for detecting the height difference of the adjustment roller.

[0014] Preferably, the power mechanism includes a first reducer connected to the adsorption roller and a first motor connected to the first reducer.

[0015] Preferably, the slurry transfer and feeding mechanism includes a plate roller and an anilox roller rotatably mounted on the carrier plate, a scraper box for feeding the anilox roller is mounted on the carrier plate, and the plate roller is used to grab and transfer the slurry on the anilox roller to coat the diaphragm.

[0016] Preferably, the plate roller is connected to a third driving mechanism, and the anilox roller is connected to a fourth driving mechanism.

[0017] Preferably, it also includes a first spacing adjustment mechanism, a second spacing adjustment mechanism and a third spacing adjustment mechanism. The first spacing adjustment mechanism is used to adjust the distance between the plate roller and the anilox roller, the second spacing adjustment mechanism is used to adjust the distance between the scraper box and the anilox roller, and the third spacing adjustment mechanism is used to adjust the distance between the plate roller and the back roller.

[0018] Preferably, the scraper box is provided with a storage cavity and scraper blades located on both sides of the storage cavity and arranged obliquely, one side of the anilox roller is arranged in the storage cavity, and the scraper blades slide in cooperation with the surface of the anilox roller; the scraper box is provided with a liquid inlet located at its bottom and an overflow port located at its top.

[0019] (3) Beneficial effects

[0020] The diaphragm at the unwinding position is pulled to the adsorption roller by the first transition roller and the second transition roller arranged in sequence. The adsorption roller is rotated by the power mechanism to pull the diaphragm. The pulled diaphragm then passes through the tension roller, the arc roller and the adjustment roller and reaches the back roller position, thus realizing the continuous movement of the diaphragm.

[0021] When the diaphragm passes through the arc roller, the angle of the arc roller is adjusted by the first adjustment mechanism to flatten the diaphragm. When passing through the adjustment roller, the height difference at both ends is adjusted to flatten the diaphragm in the width direction. In this way, the diaphragm is stretched and flattened before entering the back roller to ensure coating uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0023] Figure 2 This is a rear structural diagram of an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the top view of the structure of an embodiment of the utility model;

[0025] Figure 4 This is a side structural diagram of an embodiment of the present utility model;

[0026] Figure 5 This is a schematic cross-sectional view of an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the cooperation between the adjustment roller and the second adjustment mechanism in an embodiment of the present utility model;

[0028] Figure 7 This is a schematic structural diagram of the upper protective cover of an embodiment of the utility model;

[0029] exist Figures 1 to 7 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0030] Underframe 1, carrying plate 2, cross-bracing connecting pipe 3, first transition roller 4, second transition roller 5, adsorption roller 6, tension roller 7, arc roller 8, adjustment roller 9, back roller 10, power mechanism 11, first drive mechanism 12, first adjustment mechanism 13, second adjustment mechanism 14, mounting block 141, sliding guide rail 142, sliding block 143, second drive mechanism 144, drive screw 145, rotary drive member 146, slurry transfer and feeding mechanism 15, plate roller 151, anilox roller 152, scraper box 153, third drive mechanism 16, fourth drive mechanism 17, first spacing adjustment mechanism 18, second spacing adjustment structure 19, third spacing adjustment mechanism 20, and shield 21. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] See also Figure 1-Figure 7 As shown, in an embodiment of the present invention, a battery diaphragm coating device is proposed, comprising a base frame 1 and two supporting plates 2 installed on the base frame 1 at intervals, with multiple cross-bracing connecting tubes 3 arranged between the two supporting plates 2. The base frame 1, the supporting plates 2, and the cross-bracing connecting tubes 3 form a frame structure. A protective cover 21 is also provided on the outside of the entire frame structure to protect the interior, and the frame structure forms the main load-bearing foundation. A first transition roller 4, a second transition roller 5, a suction roller 6, a tension roller 7, a curved roller 8, an adjustment roller 9, and a back roller 10 are installed between the two supporting plates 2 along the direction of diaphragm movement. That is, the diaphragm pulled out from the unwinding position is guided by the first transition roller 4 and the second transition roller 5 in sequence, and then is pulled by the suction roller 6 to achieve dynamic traction and pull the diaphragm backward. After being guided by the tension roller 7 again, the diaphragm is flattened and adjusted by the curved roller 8 and the adjustment roller 9, and finally moves to the back roller 10 position to continue pulling backward.

[0033] Among them, a power mechanism 11 is connected to the adsorption roller 6, and a first drive mechanism 12 is connected to the back roller 10. The power mechanism 11 brings the adsorption roller 6 to realize power input to pull and move the diaphragm, and the first drive mechanism 12 drives the back roller 10, thereby continuously pulling and moving the diaphragm at the coating position.

[0034] Specifically, the carrier plate 2 is mounted with a first adjustment mechanism 13 for adjusting the shaping angle of the curved roller 8 , and a second adjustment mechanism 14 for adjusting the height difference between the ends of the adjustment roller 9 . The first adjustment mechanism 13 adjusts the relative angle of the curved roller 8 , thereby changing the pulling force of the curved roller 8 on the diaphragm. The angle adjustment mentioned here is to adjust the eccentricity of the curved roller 8 relative to the axis, thereby increasing the flattening pulling force on the diaphragm. The second adjustment mechanism 14 adjusts the height difference between the ends of the adjustment roller 9 , further flattening and pulling the diaphragm after passing through the adjustment roller 9 . After the traction and adjustment described above, the diaphragm is flattened after moving to the backing roller 10 , thereby ensuring coating uniformity.

[0035] At the same time, a slurry transfer and loading mechanism 15 is provided on the two supporting plates 2 for transferring the slurry and cooperating with the back roller 10 to coat it on the diaphragm. The slurry is loaded through the slurry transfer and loading mechanism 15 and transferred according to the coating position. The coating process is completed after the diaphragm moves to the position of the back roller 10.

[0036] Specifically, the first adjustment mechanism 13 can be an integrated mechanism currently integrated on the arc roller 8, while the second adjustment mechanism 14 can be adjusted manually or automatically.

[0037] Specifically, the second adjustment mechanism 14 includes a mounting block 141 mounted on the supporting plate 2, the mounting block 141 is provided with a sliding guide rail 142 and a sliding block 143 mounted on the sliding guide rail 142, the adjustment roller 9 is rotatably mounted on the sliding block 143, and at the same time, a second driving mechanism 144 for adjusting the sliding block 143 relative to the sliding guide rail 142 is provided on the mounting block 141. The second driving mechanism 144 is used to slide the sliding block 143 relative to the sliding guide rail 142 to achieve height adjustment of the end of the adjustment roller 9.

[0038] Among them, the second driving mechanism 144 includes a driving screw 145 rotatably mounted on the mounting block 141, the driving screw 145 is threadedly connected to the sliding block 143, and a rotating driving member 146 is connected to the driving screw 145. The rotating driving member 146 rotates the driving screw 145 and then pulls the sliding block 143 to slide relative to it, thereby realizing the adjustment of the end height of the adjustment roller 9.

[0039] In one embodiment, the rotary drive member 146 is a manual rotary knob, which is provided with a stop-rotation adjustment member. The drive screw 145 is rotated by the manual rotary knob, and the stop-rotation adjustment member is used to limit whether the manual rotary knob can rotate.

[0040] In another embodiment, the rotating drive member 146 is a rotating motor, and the mounting block 141 is provided with a detection sensor for detecting the height difference of the adjustment roller 9. The detection sensor can use an infrared sensor, a position sensor, etc. to detect the height of the corresponding end of the adjustment roller 9, and realize the rotation drive of the driving screw 145 through the rotating motor, thereby realizing the height adjustment of the corresponding end, so as to realize the height difference adjustment and meet the flattening traction of the diaphragm, so that the diaphragm is flattened before entering the back roller 10.

[0041] Specifically, the power mechanism 11 includes a first reducer connected to the adsorption roller 6 and a first motor connected to the first reducer. The adsorption roller 6 is driven by the first motor and the first reducer, so that the adsorption roller 6 pulls the diaphragm.

[0042] The slurry is loaded and the coating process is completed through the slurry transfer loading mechanism 15. Specifically, the slurry transfer loading mechanism 15 includes a plate roller 151 and an anilox roller 152 rotatably mounted on the carrier plate 2. A scraper box 153 for loading the anilox roller 152 is mounted on the carrier plate 2. The plate roller 151 is used to grab and transfer the slurry on the anilox roller 152 and apply it to the diaphragm. The slurry is loaded onto the anilox roller 152 through the scraper box 153, and the plate roller 151 transfers the slurry on the anilox roller 152 and cooperates with the back roller 10 to coat it on the diaphragm.

[0043] Among them, a storage cavity and scraper blades located on both sides of the storage cavity and arranged obliquely are provided on the scraper box 153, one side of the anilox roller 152 is provided in the storage cavity, and the scraper blades slide in cooperation with the surface of the anilox roller 152, and a liquid inlet located at the bottom and an overflow port located at the top are provided on the scraper box 153; the slurry is pumped into the storage cavity through the liquid inlet and continuously discharged from the overflow port, thereby ensuring that the storage cavity is filled with slurry and eliminating foam, and after the anilox roller 152 is loaded, the excess slurry is retained in the storage cavity by the scraper blades, and the anilox roller 152 rotates to realize the transfer of the slurry from the storage cavity to the plate roller 151.

[0044] Specifically, a third driving mechanism 16 is connected to the plate roller 151, and a fourth driving mechanism 17 is connected to the anilox roller 152. The plate roller 151 is driven to rotate by the third driving mechanism 16, and the anilox roller 152 is driven to rotate by the fourth driving mechanism 17. The third driving mechanism 16 and the fourth driving mechanism 17 can adopt a driving group consisting of a motor and a reducer, or existing mature technologies such as a rotary cylinder.

[0045] At the same time, it also includes a first spacing adjustment mechanism 18, a second spacing adjustment mechanism and a third spacing adjustment mechanism 20. The first spacing adjustment mechanism 18 is used to adjust the distance between the plate roller 151 and the anilox roller 152, the second spacing adjustment mechanism is used to adjust the distance between the scraper box 153 and the anilox roller 152, and the third spacing adjustment mechanism 20 is used to adjust the distance between the plate roller 151 and the back roller 10. The spacing needs to be adjusted based on the coating thickness requirements. Specifically, when adjusting the spacing, it is ensured that the thickness of the slurry loaded from the scraper box 153 to the anilox roller 152, the thickness of the slurry grabbed from the anilox roller 152 by the plate roller 151, and the thickness of the slurry coated on the diaphragm by the plate roller 151 are kept consistent.

[0046] Specifically, the first spacing adjustment mechanism 18, the second spacing adjustment mechanism and the third spacing adjustment mechanism 20 can adopt the same structure, and can adopt a slide rail slider mechanism to achieve relative position adjustment, a screw mechanism to achieve position adjustment, or a wedge block to achieve spacing adjustment. Specifically, mature technologies in the existing technology can be adopted.

[0047] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and description, and should not be construed as indicating or implying relative importance.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A battery separator coating device, characterized in that: It comprises a base frame and two bearing plates installed on the base frame at intervals, and a plurality of cross-bracing connecting pipes are arranged at intervals between the two bearing plates; A first transition roller, a second transition roller, a suction roller, a tension roller, a curved roller, an adjustment roller and a back roller are installed between the two supporting plates and arranged along the moving direction of the diaphragm; The adsorption roller is connected to a power mechanism, and the backing roller is connected to a first driving mechanism; The supporting plate is provided with a first adjusting mechanism for adjusting the shaping angle of the arc roller, and the supporting plate is provided with a second adjusting mechanism for adjusting the height difference between the two ends of the adjusting roller; The two carrying plates are also provided with a slurry transfer and loading mechanism for transferring the slurry and cooperating with the backing roller to coat the slurry onto the diaphragm.

2. A battery separator coating device according to claim 1, characterized in that: The second adjustment mechanism includes a mounting block mounted on the carrying plate, the mounting block is provided with a sliding guide rail and a sliding block mounted on the sliding guide rail, and the adjustment roller is rotatably mounted on the sliding block; The mounting block is provided with a second driving mechanism for adjusting the sliding block to slide relative to the sliding guide rail.

3. A battery separator coating device according to claim 2, characterized in that: The second driving mechanism includes a driving screw rotatably mounted on the mounting block, and the driving screw is threadedly connected to the sliding block; The driving screw is connected to a rotary driving member.

4. A battery separator coating device according to claim 3, characterized in that: The rotary driving member is a manual rotary knob, and a rotation-stop adjusting member is provided on the manual rotary knob.

5. The battery separator coating device according to claim 3, characterized in that: The rotary driving member is a rotary motor, and the mounting block is provided with a detection sensor for detecting the height difference of the adjustment roller.

6. The battery separator coating device according to claim 1, characterized in that: The power mechanism includes a first reducer connected to the adsorption roller and a first motor connected to the first reducer.

7. A battery separator coating device according to any one of claims 1 to 6, characterized in that: The slurry transfer and feeding mechanism includes a plate roller and an anilox roller rotatably mounted on the carrier plate, a scraper box for feeding the anilox roller is mounted on the carrier plate, and the plate roller is used to grab and transfer the slurry on the anilox roller and apply it to the diaphragm.

8. The battery separator coating device according to claim 7, characterized in that: The plate roller is connected to a third driving mechanism, and the anilox roller is connected to a fourth driving mechanism.

9. The battery separator coating device according to claim 7, characterized in that: It also includes a first spacing adjustment mechanism, a second spacing adjustment mechanism and a third spacing adjustment mechanism. The first spacing adjustment mechanism is used to adjust the distance between the plate roller and the anilox roller, the second spacing adjustment mechanism is used to adjust the distance between the scraper box and the anilox roller, and the third spacing adjustment mechanism is used to adjust the distance between the plate roller and the back roller.

10. The battery separator coating device according to claim 7, characterized in that: The scraper box is provided with a material storage cavity and scraper blades located on both sides of the material storage cavity and arranged obliquely. One side of the anilox roller is arranged in the material storage cavity, and the scraper blades are slidably matched with the surface of the anilox roller. The scraper box is provided with a liquid inlet located at the bottom and an overflow port located at the top.

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