Lithium battery coating thickness measuring system

Abstract

The utility model discloses a lithium battery coating thickness measuring system which comprises a coating device, a feeding port and a discharging port of the coating device are respectively provided with a detection device, each detection device comprises a fixing frame fixedly installed with the coating device, a fixing plate is fixedly installed in the middle of each fixing frame, and the fixing plates are fixedly installed on the feeding port and the discharging port of the coating device. A first guide sliding rod located below the fixing plate is fixedly installed in the middle of the fixing frame, a rotating shaft is rotationally connected to the middle of the fixing plate in a penetrating mode, a driving motor located on one side of the rotating shaft is fixedly installed at the top of the fixing plate, and a follow-up gear is fixedly installed at the top of the rotating shaft; and a rotating disc located below the fixing plate is integrally arranged at the bottom of the rotating shaft. Before the battery pole piece enters the coating device, the upper laser distance measuring sensor and the lower laser distance measuring sensor are symmetrically arranged, and distance measurement is performed through the two laser distance measuring sensors, so that the influence caused by vibration of the lithium battery pole piece is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery detection, in particular to a lithium battery coating thickness measurement system. Background Art

[0002] Under the international environment of energy conservation and emission reduction, countries around the world are striving to develop and apply green energy. Lithium-ion batteries, as a high-performance rechargeable green battery with high energy density, long cycle life, good rate performance, environmental friendliness and no pollution, have been increasingly used in various electronic products due to their advantages such as high single cell voltage, large capacity, small size, light weight and wide operating temperature range. The research and development of lithium-ion power batteries has received great attention.

[0003] In the production process of lithium-ion power batteries, pole piece coating is a relatively important link, and the pole piece coating production line is also one of the key equipment. In the pole piece coating production process, pole piece sampling and testing is another important link. The existing testing method is to use die sampling during the coating production interval, that is, when it pauses (drying process requirements), and then perform relevant process tests on the samples. Although this method is low-cost, sampling must be carried out during the coating production interval, which cannot reflect the quality status of the coating production in a timely manner, cannot monitor the coating quality in real time, and has large production losses and low detection efficiency.

[0004] To this end, we propose a lithium battery coating thickness measurement system. Utility Model Content

[0005] The purpose of the utility model is to provide a lithium battery coating thickness measurement system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lithium battery coating thickness measurement system, comprising a coating device, wherein the feed port and the discharge port of the coating device are respectively provided with detection devices, the detection device comprises a fixed frame fixedly installed with the coating device, a fixed plate is fixedly installed in the middle of the fixed frame, a first guide slide bar located below the fixed plate is fixedly installed in the middle of the fixed frame, a rotating shaft is rotatably connected through the middle of the fixed plate, a driving motor located on one side of the rotating shaft is fixedly installed on the top of the fixed plate, a follower gear is fixedly installed on the top of the rotating shaft, a turntable located below the fixed plate is integrally provided at the bottom of the rotating shaft, the first guide slide bar is slidably connected through the sliding long plate, a toggle shaft close to the periphery of the turntable is integrally provided at the bottom of the turntable, a sliding groove is provided at the top of the sliding long plate, the toggle shaft is slidably connected to the inside of the sliding groove, a displacement block is provided in the middle of the bottom of the sliding long plate, and a laser ranging sensor is fixedly installed at the bottom of the displacement block.

[0007] Optionally, a second guide slide bar is fixedly installed in the middle of the fixing frame and is located directly below the fixing plate, and the front and rear sides of the displacement block are respectively slidably connected to the front and rear ends of the second guide slide bar.

[0008] Optionally, the sliding long plate is arranged parallel to two sides of the fixing frame, and the length of the sliding long plate is greater than the diameter of the turntable.

[0009] Optionally, the two fixing plates are symmetrically arranged on the upper and lower sides of the fixing frame, and another rotating shaft is rotatably connected to the middle of the fixing plate located at the bottom.

[0010] Optionally, one side of the fixed frame is rotatably connected to a transmission rod, and transmission components are respectively provided at the upper and lower ends of the transmission rod, and the bottom of the other rotating shaft is transmission-connected to the transmission rod through a group of transmission components.

[0011] Optionally, the transmission rod is connected to a rotating shaft equipped with a driving gear through another set of transmission components, and the transmission component is located between the gear and the fixed plate.

[0012] Optionally, the transmission assembly includes two synchronous wheels fixedly mounted on the transmission rod and the rotating shaft respectively, and a synchronous belt transmission-connected to the two synchronous wheels.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The lithium battery coating thickness measurement system is provided with detection devices at the feed port and the discharge port of the coating device. Before the battery pole piece enters the coating device, the upper and lower laser distance measuring sensors are symmetrically arranged, and the distance between the two laser sensors is constant. The detection data is calculated by a computer to obtain the thickness of the battery pole piece. Similarly, the thickness of the battery pole piece after coating is measured again by two laser distance measuring sensors in another group of detection devices to obtain the total thickness of the battery pole piece after coating. The coating thickness of the battery pole piece can be obtained by subtracting the two data. In addition, the distance measurement by two laser distance measuring sensors eliminates the influence of the vibration of the lithium battery pole piece.

[0015] 2. The lithium battery coating thickness measurement system drives the driving motor to rotate the active gear and the follower gear, so that the rotating shaft and the turntable rotate, and drives another turntable to rotate synchronously through the transmission rod and the transmission assembly, so that the toggle shaft of the turntable drives the sliding long plate to move back and forth along the first guide slide bar, driving the displacement block and the laser ranging sensor to scan the battery pole piece back and forth, and the battery pole piece is constantly moving forward, thus forming an S-shaped detection path, which can continuously and accurately detect the coating thickness on the surface of the lithium battery pole piece, and realize real-time detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the lithium battery coating thickness measurement system of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the detection device of the lithium battery coating thickness measurement system of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the turntable of the lithium battery coating thickness measurement system of the utility model;

[0019] Figure 4 The schematic diagram of the structure of the sliding long plate of the lithium battery coating thickness measurement system of the utility model is shown.

[0020] In the figure: 1. coating device; 2. detection device; 201. fixed frame; 202. fixed plate; 203. rotating shaft; 204. turntable; 205. toggle shaft; 206. first guide slide bar; 207. sliding long plate; 208. sliding groove; 209. displacement block; 210. second guide slide bar; 211. laser ranging sensor; 212. driving motor; 213. driving gear; 214. follower gear; 215. transmission assembly; 216. transmission rod. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figures 1 to 4The utility model provides a lithium battery coating thickness measurement system, comprising a coating device 1, wherein the feed port and the discharge port of the coating device 1 are respectively provided with a detection device 2, the detection device 2 comprises a fixed frame 201 fixedly installed with the coating device 1, a fixed plate 202 is fixedly installed in the middle of the fixed frame 201, a first guide slide bar 206 located below the fixed plate 202 is fixedly installed in the middle of the fixed frame 201, a rotating shaft 203 is rotatably connected to the middle of the fixed plate 202, a driving motor 212 located on one side of the rotating shaft 203 is fixedly installed on the top of the fixed plate 202, a follower gear 214 is fixedly installed on the top of the rotating shaft 203, a turntable 204 located below the fixed plate 202 is integrally provided at the bottom of the rotating shaft 203, a sliding long plate 207 is slidably connected to the first guide slide bar 206, a toggle shaft 205 close to the periphery of the rotating plate 204 is integrally provided at the bottom of the sliding long plate 2 A sliding groove 208 is provided on the top of 07, and the toggle shaft 205 is slidably connected to the inside of the sliding groove 208. A displacement block 209 is provided in the middle of the bottom of the sliding long plate 207, and a laser ranging sensor 211 is fixedly installed on the bottom of the displacement block 209. By arranging the detection device 2 at the feeding port and the discharging port of the coating device 1, before the battery electrode enters the coating device 1, since the upper and lower laser ranging sensors 211 are symmetrically arranged, and the distance between the two laser sensors is constant, the detection data is calculated by a computer to obtain the thickness of the battery electrode. Similarly, the battery electrode after coating is measured again by two laser ranging sensors 211 in another group of detection devices 2 to obtain the total thickness of the battery electrode after coating. The coating thickness of the battery electrode can be obtained by subtracting the two data. In addition, the distance measurement by two laser ranging sensors 211 eliminates the influence of the vibration of the lithium battery electrode.

[0023] A second guide slide bar 210 located just below the fixed plate 202 is fixedly installed in the middle of the fixed frame 201 , and the front and rear sides of the displacement block 209 are respectively slidably connected with the front and rear ends of the second guide slide bar 210 .

[0024] The long sliding plate 207 is arranged parallel to two sides of the fixing frame 201 , and the length of the long sliding plate 207 is greater than the diameter of the rotating disk 204 .

[0025] The two fixing plates 202 are symmetrically arranged on the upper and lower sides of the fixing frame 201 , and another rotating shaft 203 is rotatably connected to the middle of the fixing plate 202 located at the bottom.

[0026] A transmission rod 216 is rotatably connected to one side of the fixing frame 201 , and transmission components 215 are respectively provided at the upper and lower ends of the transmission rod 216 . The bottom of the other rotating shaft 203 is transmission-connected to the transmission rod 216 via a set of transmission components 215 .

[0027] The transmission rod 216 is connected to the rotating shaft 203 on which the driving gear 213 is installed through another transmission assembly 215 . The transmission assembly 215 is located between the gear and the fixed plate 202 .

[0028] The transmission assembly 215 includes two synchronous wheels fixedly installed with the transmission rod 216 and the rotating shaft 203 respectively, and a synchronous belt connected to the two synchronous wheels. The driving motor 212 drives the driving gear 213 and the follower gear 214 to rotate, so that the rotating shaft 203 and the turntable 204 rotate, and the transmission rod 216 and the transmission assembly 215 drive another turntable 204 to rotate synchronously, so that the toggle shaft 205 of the turntable 204 drives the sliding long plate 207 to move back and forth along the first guide slide bar 206, and drives the displacement block 209 and the laser ranging sensor 211 to scan the battery pole piece back and forth. The battery pole piece is constantly moving forward, thereby forming an S-shaped detection path, which can continuously and accurately detect the coating thickness on the surface of the lithium battery pole piece, and realize real-time detection.

[0029] Working principle:

[0030] A detection device 2 is set at the feed port and the discharge port of the coating device 1. The detection device 2 performs thickness detection on the battery electrode before entering the coating device 1 and after coating. The driving motor 212 drives the driving gear 213 and the follower gear 214 to rotate, so that the rotating shaft 203 and the turntable 204 rotate, and the transmission rod 216 and the transmission assembly 215 drive another turntable 204 to rotate synchronously, so that the toggle shaft 205 of the turntable 204 drives the sliding long plate 207 to move back and forth along the first guide slide bar 206, and drives the displacement block 209 and the laser ranging sensor 211 to scan the battery electrode back and forth, and the battery electrode is constantly moving. It moves forward, thus forming an S-shaped detection path, which can continuously and accurately detect the coating thickness on the surface of the lithium battery electrode. Since the upper and lower laser distance measuring sensors 211 are symmetrically arranged and the distance between the two laser sensors is constant, the detection data is calculated by a computer to obtain the thickness of the battery electrode. Similarly, the coated battery electrode is measured again by two laser distance measuring sensors 211 in another group of detection devices 2 to obtain the total thickness of the battery electrode after coating. By subtracting the two data, the coating thickness of the battery electrode can be obtained. In addition, the distance measurement by two laser distance measuring sensors 211 eliminates the influence of the vibration of the lithium battery electrode.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery coating thickness measurement system, comprising a coating device (1), characterized in that: The feed inlet and the discharge outlet of the coating device (1) are respectively provided with a detection device (2), and the detection device (2) comprises a fixed frame (201) fixedly mounted on the coating device (1), a fixed plate (202) is fixedly mounted in the middle of the fixed frame (201), a first guide slide bar (206) located below the fixed plate (202) is fixedly mounted in the middle of the fixed frame (201), a rotating shaft (203) is rotatably connected to the middle of the fixed plate (202), a driving motor (212) located on one side of the rotating shaft (203) is fixedly mounted on the top of the fixed plate (202), and a follower gear is fixedly mounted on the top of the rotating shaft (203). The rotating shaft (203) is provided with a rotating disk (204) located below the fixed plate (202) at the bottom thereof, the first guide slide bar (206) penetrates and is slidably connected with a sliding long plate (207), the bottom of the rotating disk (204) is provided with a toggle shaft (205) close to the periphery of the rotating disk (204) at the bottom thereof, a sliding groove (208) is provided at the top of the sliding long plate (207), the toggle shaft (205) is slidably connected with the inside of the sliding groove (208), a displacement block (209) is provided at the middle of the bottom of the sliding long plate (207), and a laser distance measuring sensor (211) is fixedly installed at the bottom of the displacement block (209).

2. The lithium battery coating thickness measurement system according to claim 1, characterized in that: A second guide slide bar (210) located directly below the fixed plate (202) is fixedly installed in the middle of the fixed frame (201), and the front and rear sides of the displacement block (209) are respectively slidably connected to the front and rear ends of the second guide slide bar (210).

3. The lithium battery coating thickness measurement system according to claim 1, characterized in that: The sliding long plate (207) is arranged parallel to two sides of the fixing frame (201), and the length of the sliding long plate (207) is greater than the diameter of the rotating disk (204).

4. The lithium battery coating thickness measurement system according to claim 1, characterized in that: The two fixing plates (202) are symmetrically arranged on the upper and lower sides of the fixing frame (201), and another rotating shaft (203) is rotatably connected to the middle of the fixing plate (202) located at the bottom.

5. The lithium battery coating thickness measurement system according to claim 4, characterized in that: One side of the fixed frame (201) is rotatably connected to a transmission rod (216), and transmission components (215) are respectively provided at the upper and lower ends of the transmission rod (216). The bottom of the other rotating shaft (203) is transmission-connected to the transmission rod (216) via a group of transmission components (215).

6. The lithium battery coating thickness measurement system according to claim 5, characterized in that: The transmission rod (216) is connected to a rotating shaft (203) on which a driving gear (213) is installed through another transmission assembly (215), and the transmission assembly (215) is located between the gear and the fixed plate (202).

7. The lithium battery coating thickness measurement system according to claim 6, characterized in that: The transmission assembly (215) comprises two synchronous wheels fixedly mounted on the transmission rod (216) and the rotating shaft (203) respectively, and a synchronous belt transmission-connected to the two synchronous wheels.

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