Device for detecting overpressed scratches on surface of aluminum foil blank of battery foil

Abstract

The utility model discloses a device for detecting overpressed scratches on the surface of an aluminum foil blank of a battery foil, which relates to the technical field of battery raw material production and comprises an alkali washing oil and dust removal tank, a nitric acid neutralizing tank and a water washing tank which are arranged in sequence, a plurality of conveying rollers for conveying battery foil and aluminum foil blanks are arranged among the alkali washing oil and dust removing tank, the nitric acid neutralizing tank and the water washing tank, and an exhaust fan system is arranged above the alkali washing oil and dust removing tank, the nitric acid neutralizing tank and the water washing tank. The temperature of the alkali washing oil and ash removal tank is 40-60 DEG C, and the concentration of alkali liquor in the alkali washing oil and ash removal tank is 5-10%. The concentration of nitric acid in the nitric acid neutralizing tank is 9-11%. By the adoption of the structure, scratches on the surface of the aluminum foil of the battery foil can be found in time, pinhole defects are reduced, the batch quality problem is avoided, the waste loss phenomenon caused by the pinhole problem on site is reduced, and the yield of battery foil products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery raw material production, in particular to a detection device for surface pressing scratches of battery foil aluminum foil blanks. Background Art

[0002] Battery foil is a key component of lithium-ion batteries, and its performance directly affects the overall performance of the batteries. Therefore, it plays a crucial role in battery research and development and production. The battery foil market has put forward higher requirements for battery foil products. Battery foil customers have increasingly strict quality requirements for battery foil products. The phenomenon of tape breakage caused by pinhole defects in battery foil materials occurs from time to time. Through previous traceability, it is mainly the fixed-position string-shaped pinholes generated in the cold rolling process, mainly caused by foreign objects sticking to the inlet guide rollers of cold rolling.

[0003] Some pinholes in battery foil products are generated during the cold rolling process, mainly due to surface scratches caused by foreign objects on the guide rollers. As the number of rolling passes increases, the scratches after rolling are not easily detected. As the thickness continuously decreases, more and more pinholes appear. After the final thickness of the battery foil product reaches 0.008 - 0.015 mm, its surface scratches are even more difficult to detect. Existing devices are difficult to timely detect pressing scratches, resulting in an increase in the probability of materials with pinhole defects caused by surface pressing scratches, a decrease in the finished product rate, thus wasting raw materials and causing economic losses.

[0004] Therefore, it is necessary to provide a detection device for surface pressing scratches of battery foil aluminum foil blanks to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a detection device for surface pressing scratches of battery foil aluminum foil blanks, which can timely detect surface scratches of battery foil aluminum foil, thereby reducing the generation of pinhole defects, avoiding the generation of batch quality problems, reducing the waste loss phenomenon caused by pinhole problems on site, and improving the finished product rate of battery foil products.

[0006] To achieve the above purpose, the utility model provides a detection device for surface pressing scratches of battery foil aluminum foil blanks, including a caustic washing, degreasing and ash-removing tank, a nitric acid neutralization tank and a water washing tank arranged in sequence. There are several conveyor roller wheels for conveying battery foil aluminum foil blanks arranged between the caustic washing, degreasing and ash-removing tank, the nitric acid neutralization tank and the water washing tank. An exhaust fan system is arranged above the caustic washing, degreasing and ash-removing tank, the nitric acid neutralization tank and the water washing tank.

[0007] Preferably, the caustic washing, degreasing and ash-removing tank, the nitric acid neutralization tank and the water washing tank are all acid and alkali-resistant rectangular tanks. The length, width and height of the outer dimensions of the rectangular tank are 1700 mm, 300 mm and 1000 mm in sequence, and the wall thickness of the rectangular tank is 20 mm.

[0008] Preferably, a heating rod for heating the alkaline solution is arranged inside the alkaline washing, degreasing and deashing tank, and a thermocouple for detecting the temperature of the tank is inserted into the alkaline washing, degreasing and deashing tank.

[0009] Preferably, a first wiping device is arranged at the tail end of the alkaline washing, degreasing and deashing tank, a lighting lamp is arranged above the first wiping device, and a second wiping device is arranged at the tail end of the nitric acid neutralization tank.

[0010] Preferably, the exhaust system is at least two exhaust fans.

[0011] Preferably, the temperature of the alkaline washing, degreasing and deashing tank is 40 - 60 °C, and the concentration of the alkaline solution inside the alkaline washing, degreasing and deashing tank is 5 - 10%.

[0012] Preferably, the concentration of nitric acid in the nitric acid neutralization tank is 9 - 11%.

[0013] Therefore, the detection device for surface rolling scratches of battery foil aluminum foil blank adopted by the present utility model has the following beneficial effects:

[0014] 1. The present utility model detects the surface of the battery foil aluminum foil blank through the alkaline washing, degreasing and deashing tank, making the scratches more intuitive.

[0015] 2. The present utility model can timely detect the scratches on the surface of the battery foil aluminum foil, thereby reducing the generation of pinhole defects, avoiding the generation of batch quality problems, reducing the waste loss phenomenon caused by pinhole problems on site, and improving the yield of battery foil products.

[0016] The technical solution of the present utility model will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the detection device for surface rolling scratches of battery foil aluminum foil blank of the present utility model;

[0018] Figure 2 is an internal schematic diagram of the detection device for surface rolling scratches of battery foil aluminum foil blank of the present utility model;

[0019] Reference Signs:

[0020] 1. Alkaline washing, degreasing and deashing tank; 2. Nitric acid neutralization tank; 3. Water washing tank; 4. Exhaust fan system; 5. Thermocouple; 6. First wiping device; 7. Lighting lamp; 8. Second wiping device; 9. Heating rod; 10. Conveyor roller; 11. Battery foil aluminum foil blank. Specific Embodiments

[0021] The technical solution of the present utility model will be further described below through the drawings and embodiments.

[0022] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the ordinary meanings understood by those with ordinary skills in the field to which this utility model belongs.

[0023] The words such as "including" or "comprising" used in this utility model mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements. The orientation or positional relationship indicated by terms such as "inside", "outside", "above", "below", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In this utility model, unless otherwise clearly specified and defined, terms such as "adhering" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.

[0024] The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. For machinery, parts and equipment, conventional models are used. For the exhaust fan system, thermocouple, heating rod, and lighting lamp, an external power supply is provided. The driving roller is connected to a conveyor motor. The circuit connection adopts the conventional connection method in the prior art and will not be elaborated here.

[0025] As shown in the Figure 1 and the Figure 2 drawings, this utility model discloses a detection device for surface pressing scratches of battery foil aluminum foil blanks, which includes a caustic washing, degreasing and deashing tank 1, a nitric acid neutralization tank 2, and a water washing tank 3 arranged in sequence. Between the caustic washing, degreasing and deashing tank 1, the nitric acid neutralization tank 2, and the water washing tank 3, a number of conveyor rollers 10 for conveying the battery foil aluminum foil blanks 11 are provided. Above the caustic washing, degreasing and deashing tank 1, the nitric acid neutralization tank 2, and the water washing tank 3, an exhaust fan system 4 is provided. The exhaust fan system 4 has at least two exhaust fans, and the two exhaust fans are respectively above the caustic washing, degreasing and deashing tank 1 and the nitric acid neutralization tank 2. The exhaust fan system 4 is used to absorb the generated gas, and an additional exhaust fan can be provided for the water washing tank 3.

[0026] The caustic washing, degreasing and deashing tank 1, the nitric acid neutralization tank 2, and the water washing tank 3 are all acid and alkali resistant rectangular tanks. The length, width, and height of the outer dimensions of the rectangular tank are 1700 mm, 300 mm, and 1000 mm in sequence, and the wall thickness of the rectangular tank is 20 mm.

[0027] Inside the alkali cleaning, degreasing and ash removing tank 1, there is a heating rod 9 for heating the alkali solution, and a thermocouple 5 for detecting the temperature of the tank is inserted into the alkali cleaning, degreasing and ash removing tank 1. When the temperature of the alkali cleaning, degreasing and ash removing tank is 40 - 60 °C, the heating rod 9 is turned off, and the battery foil aluminum foil blank 11 is put in. The battery foil aluminum foil blank 11 will react with the alkali solution, and white foam will be generated on the surface. The concentration of the alkali solution inside the alkali cleaning, degreasing and ash removing tank 1 is 5 - 10%.

[0028] The concentration of nitric acid in the nitric acid neutralization tank 2 is 9 - 11%, which can neutralize the alkalinity on the surface of the battery foil aluminum foil blank 11.

[0029] At the tail end of the alkali cleaning, degreasing and ash removing tank 1, there is a first wiping device 6, and above the first wiping device 6, there is a lighting lamp 7. By placing the lighting lamp 7, its defects can be reflected under direct light, making it convenient to observe. At the tail end of the nitric acid neutralization tank 2, there is a second wiping device 8 that can wipe the acid solution on the surface of the battery foil aluminum foil blank 11, thus avoiding the accumulation of acidity in the liquid in the subsequent water washing tank 3, and thus the need for frequent replacement. The surfaces of both the first wiping device 6 and the second wiping device 8 have acid and alkali resistant absorption wiping cloths.

[0030] In the specific implementation process, the thermocouple 5 is used to observe the heating situation of the heating rod 9 in the alkali cleaning, degreasing and ash removing tank 1. When the temperature of the alkali solution is about 50 °C, driven by the conveyor roller 10, the battery foil aluminum foil blank 11 enters the alkali cleaning, degreasing and ash removing tank 1 for 10 - 60 s. The battery foil aluminum foil blank 11 will react with the alkali solution, and white foam will be generated on the surface. The surface is observed, and then the battery foil aluminum foil blank 11 passes through the first wiping device 6. Under the illumination of the lighting lamp 7, the scratches on its surface are found and marked. After the surface acidity and alkalinity are neutralized in the nitric acid neutralization tank 2, it is wiped by the second wiping device 8 and enters the water washing tank 3 for normal temperature cleaning of the surface. Subsequently, the surface is observed manually to determine the position and degree of the scratches.

[0031] Therefore, by adopting the above detection device for surface rolling scratches of the battery foil aluminum foil blank, the present utility model can timely detect the scratches on the surface of the battery foil aluminum foil, reduce the generation of pinhole defects, avoid the generation of batch quality problems, reduce the waste loss phenomenon caused by pinhole problems on site, and improve the yield of the battery foil product.

[0032] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A detection device for surface pressing scratches of battery foil aluminum foil blank, characterized in that, It includes an alkaline cleaning, degreasing and descaling tank, a nitric acid neutralization tank and a water washing tank arranged in sequence. There are several conveyor rollers for transporting the battery foil aluminum foil blanks between the alkaline cleaning, degreasing and descaling tank, the nitric acid neutralization tank and the water washing tank. An exhaust fan system is arranged above the alkaline cleaning, degreasing and descaling tank, the nitric acid neutralization tank and the water washing tank.

2. The detection device for surface pressing scratches of the battery foil aluminum foil blank according to claim 1, wherein The alkaline cleaning, degreasing and descaling tank, the nitric acid neutralization tank and the water washing tank are all acid and alkali resistant rectangular tanks. The length, width and height of the outer dimensions of the rectangular tank are 1700mm, 300mm and 1000mm in sequence, and the wall thickness of the rectangular tank is 20mm.

3. The detection device for surface pressing scratches of a battery foil aluminum foil blank according to claim 2, wherein, Heating rods for heating the alkaline solution are arranged inside the alkaline cleaning, degreasing and descaling tank, and thermocouples for detecting the tank temperature are inserted into the alkaline cleaning, degreasing and descaling tank.

4. The detection device for surface pressing scratches of a battery foil aluminum foil blank according to claim 3, characterized in that, A first wiping device is arranged at the tail end of the alkaline cleaning, degreasing and descaling tank, and a lighting lamp is arranged above the first wiping device. A second wiping device is arranged at the tail end of the nitric acid neutralization tank.

5. The detection device for surface press scratches of battery foil aluminum foil blank according to claim 1, characterized in that The exhaust fan system is at least two exhaust fans.

6. The detection device for surface pressing scratches of a battery foil aluminum foil blank according to claim 4, wherein, The temperature of the alkaline cleaning, degreasing and descaling tank is 40 - 60 °C, and the concentration of the internal alkaline solution in the alkaline cleaning, degreasing and descaling tank is 5 - 10%.

7. The detection device for surface rolling scratches of a battery foil aluminum foil blank according to claim 4, characterized in that, The concentration of nitric acid in the nitric acid neutralization tank is 9 - 11%.

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