Application cases of lithium battery CCD detection equipment in coating

During the production process of lithium battery pole pieces, the coating and baking processes may cause pole piece defects. Defective pole pieces will seriously affect the performance and service life of the lithium battery. In serious cases, they may even explode, threatening personal safety and safety. Property and well-being. The following introduces the online detection of lithium battery CCD detection equipment for pole piece defects in the coating and baking process, and the application cases of CCD detection equipment in coating.

Battery pole piece alignment detection case

1. Brief description of the system: The optical fiber is used to sense the coating edge of the pole piece to generate a signal, triggering the industrial CCD camera to take a picture of the white space in the middle of the high-speed moving coated pole piece, and then the industrial computer is used with the software system developed by the company's R&D team. Take pictures to measure dimensions, identify data, and perform low-cost, high-efficiency automated inspection operations. This system can replace the traditional manual acupuncture method.

2. Testing requirements:

1. Use 4 sets of high-speed industrial cameras to dynamically capture the edges of the battery pole piece coatings at the same time and fit them into two lines. The upper and lower sets of cameras unify the upper and lower camera coordinate systems through visual calibration, determine the upper and lower camera position baselines, and measure and fit. The distance from the line to the baseline, detects the head-to-tail alignment of the battery pole pieces, and sets a standard detection range value. If it is within the range, OK, the three-color light will turn green. If it exceeds the range, NG, an alarm will be output;

2. Width size of pole piece: 200mm~700mm;

3. Dynamic detection accuracy: ±0.1mm;

4. Static detection accuracy: ±0.01mm;

5. Assembly line speed: ≤25m/min;

6. Meet continuous coating and intermittent coating testing.

3. Detection method:

1. Detection is achieved through 4 sets of area array cameras, lenses, light sources and other detection environments;

2. Detection is achieved through 2 sets of line array cameras, lenses, light sources and other detection environments. (The installation method is different from that of area scan camera detection)

Battery pole piece burr detection case

1. Brief description of the system: After the battery pole pieces are coated, they are slit by a slitting machine. During the slitting process, the tool is damaged and causes cutting burrs. It can replace manual sampling inspection and realize real-time monitoring of production. If burrs are generated during production, a timely alarm will be issued and the machine will shut down. , the operator can check whether there is any problem with the equipment blade and deal with it in time to avoid production waste.

2. Testing requirements:

1. Type A burrs such as (triangle), type C burrs such as (circle): measure the height of the burr ≤ 20µm;

2. Type B burrs (linear): measure the hypotenuse length ≤ 20µm;

3. Measurement repeatability: ± 2µm;

4. Total thickness of pole piece: 130 ±3µm;

5. Aluminum foil thickness: 6~7µm;

6. Full inspection at low speed and random inspection at high speed.

7. Because the pole piece will be offset by about 5mm, automatic correction is achieved.

3. Detection method: Detection is achieved through 2 sets of area scan cameras, lenses, light sources and other detection environments.