Pole piece cooling system

Abstract

The utility model discloses a pole piece cooling system. The pole piece cooling system comprises an air cooling part and a water cooling part arranged behind the air cooling part, the air cooling part comprises a first air nozzle and a second air nozzle which are located on the two sides of the pole piece, air outlets of the first air nozzle and the second air nozzle face the two faces of the pole piece respectively, and the first air nozzle and the second air nozzle are connected with a cold air source; the water cooling part comprises at least one cooling roller, the pole piece is wound on the cooling roller, and the cooling roller is connected with a circulating water cooling device. According to the utility model, the temperature of the pole piece is reduced in a grading and gradient adjusting mode, so that the cooling effect of the pole piece at different temperatures can be realized; and irreversible influence of shock cooling on the quality of the pole piece can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pole piece cooling, in particular to a pole piece cooling system. Background Art

[0002] During battery manufacturing, moisture affects lithium batteries in many ways. First, moisture can react with the active materials in lithium batteries, causing performance degradation or even failure. Second, moisture can cause capacity decay, especially in high-temperature environments, where this effect is more pronounced. Furthermore, moisture can affect the charge and discharge performance of lithium batteries, reducing their cycle life.

[0003] Therefore, controlling moisture content is a key measure for improving lithium battery performance and stability. During the coating and unwinding baking processes, electrodes are dried in an oven. While high temperatures can remove excess moisture from the electrodes, they can also soften and become brittle. Therefore, proper cooling is required after the electrodes exit the oven to prevent wrinkles.

[0004] Currently, cooling is mostly done through rapid water cooling, but rapid cooling often leads to increased embrittlement of the electrode and is prone to electrode damage. Utility Model Content

[0005] The purpose of the present invention is to provide a pole piece cooling system to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A pole piece cooling system comprises an air cooling part and a water cooling part arranged behind the air cooling part;

[0008] The air cooling unit includes a first air nozzle and a second air nozzle located on both sides of the pole piece, the air outlets of the first air nozzle and the second air nozzle are respectively directed towards the two sides of the pole piece, and the first air nozzle and the second air nozzle are connected to a cold air source;

[0009] The water cooling part includes at least one cooling roller, the pole piece is wound around the cooling roller, and the cooling roller is connected to a circulating water cooling device.

[0010] The pole piece can be cooled to the required temperature by cooling it twice through the air cooling part and the water cooling part.

[0011] As a further solution of the present invention: the cold air source includes a blower and a first air inlet pipe and a second air inlet pipe connected between the blower and the first air nozzle and the second air nozzle.

[0012] The cooling part is provided with two groups of air nozzles, and the pole pieces are continuously blown to cool down by the first air nozzle and the second air nozzle arranged in sequence.

[0013] As a further solution of the present invention: an adjustable leveling roller is provided at the air outlet of the first air nozzle, and the pole piece passes between the adjustable leveling roller and the first air nozzle.

[0014] After the pole piece comes out of the oven, it first passes through the adjustable flat roller to wrap the angle of the roller to avoid difficulty in tensioning the pole piece on the roller.

[0015] As a further solution of the present invention: a threaded roller is provided at the air outlet of the second air nozzle, and the pole piece passes through between the threaded roller and the second air nozzle.

[0016] The wrinkles on the pole piece can be flattened by the threaded roller.

[0017] As a further solution of the present invention: an adjusting device is provided between the air cooling part and the water cooling part.

[0018] The adjustment device is used to adjust the posture of the pole piece when it enters the water cooling part to avoid problems such as deviation and wrinkles on the pole piece.

[0019] As a further solution of the present invention: the adjustment device includes an arc roller located behind the second air nozzle, and a deviation corrector, an adjustable groove roller, and a fixed groove roller are sequentially arranged behind the arc roller.

[0020] The deviation corrector is used to ensure that the pole piece is on the same horizontal line. The adjustable groove roller is used to adjust the left and right height according to the state of the pole piece. The large wrap angle of the fixed groove roller is used to increase the friction of the pole piece, which is convenient for the overall deviation correction of the pole piece.

[0021] As a further solution of the present invention: the water cooling part is arranged in the shell, the air cooling part and the regulating device are both located in the upper part of the shell, and a tension swing roller for transmitting pole pieces is provided between the air cooling part and the regulating device.

[0022] The tension of the entire pole piece is controlled by the tension swing roller, so that the pole piece is in a taut state during the tape conveying process.

[0023] As a further solution of the present invention: the cooling roller includes a first cooling roller and a second cooling roller arranged in sequence, and the circulating water cooling device includes a water inlet pipe and a water return pipe connected to the first cooling roller and the second cooling roller.

[0024] A circulating water cooling is formed between the water inlet pipe, the water return pipe and the cooling roller, thereby cooling the pole piece passing through the cooling roller.

[0025] As a further solution of the present invention: a first water temperature control unit is provided between the water inlet pipe and the water return pipe connected to the first cooling roller, and a second water temperature control unit is provided between the water inlet pipe and the water return pipe connected to the second cooling roller.

[0026] Temperature control parts are set on the water inlet pipe and return pipe of the cooling roller. By controlling the water flow between the water inlet pipe and the return pipe, the water inlet temperature of the water inlet pipe can be controlled.

[0027] As a further solution of the present invention: a third air nozzle and a fourth air nozzle are respectively provided on the outer sides of the first cooling roller and the second cooling roller, and the third air nozzle and the fourth air nozzle are respectively connected to the cold air source through a third air inlet pipe and a fourth air inlet pipe.

[0028] By arranging an air nozzle outside the cooling roller, the side of the electrode away from the cooling roller can be air-cooled while water cooling, thereby avoiding a large temperature difference between the two sides of the electrode.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. The present invention reduces the electrode temperature by a graded and gradient-adjusted manner, thereby achieving cooling effects on electrodes at different temperatures and avoiding the irreversible effects of sudden cooling on electrode quality.

[0031] 2. Cooling the electrode to room temperature can also reduce the risk of material shedding. The correlation between the effects of different cooling temperatures on the electrode can be verified with minimal changes, allowing for the cooling process of electrodes with different material systems to be tailored to achieve high-temperature cooling of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the cooling system structure of this embodiment;

[0033] In the figure: 1-blower, 2-first air inlet pipe, 3-second air inlet pipe, 4-third air inlet pipe, 5-fourth air inlet pipe, 6-first air nozzle, 7-second air nozzle, 8-third air nozzle, 9-fourth air nozzle, 10-adjustable flat roller, 11-threaded roller, 12-arc roller, 13-deviation corrector, 14-adjustable groove roller, 15-fixed groove roller, 16-housing, 17-first cooling roller, 18-water inlet pipe, 19-return water pipe, 20-first water temperature control unit, 21-second water temperature control unit, 22-second cooling roller, 23-tension swing roller, 24-pole piece. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figure 1 In an embodiment of the present invention, a pole piece cooling system includes an air cooling part and a water cooling part arranged behind the air cooling part. An adjusting device is arranged between the air cooling part and the water cooling part. The water cooling part is arranged in a shell 16. The air cooling part and the adjusting device are both located at the upper part of the shell 16. A tension swing roller 23 for transmitting the pole piece 24 is arranged between the air cooling part and the adjusting device. The tension of the entire pole piece is controlled by the tension swing roller 23, so that the pole piece is in a taut state during the tape walking process.

[0036] like Figure 1 As shown, the air cooling part includes a first air nozzle 6 and a second air nozzle 7 located on both sides of the pole piece. An adjustable leveling roller 10 is provided at the air outlet of the first air nozzle 6, and the pole piece passes between the adjustable leveling roller 10 and the first air nozzle 6. A threaded roller 11 is provided at the air outlet of the second air nozzle 7, and the pole piece passes between the threaded roller 11 and the second air nozzle 7. The air outlets of the first air nozzle 6 and the second air nozzle 7 are respectively directed to the two sides of the pole piece, that is, the A side of the pole piece 24 is blown and cooled by the first air nozzle 6, and the B side of the pole piece 24 is blown and cooled by the second air nozzle 7. At the same time, the roller wrapping angle is performed by the adjustable leveling roller 10 to avoid difficulty in tensioning the pole piece on the roller, and the wrinkles on the pole piece can be flattened by the threaded roller 11.

[0037] like Figure 1 As shown, the adjustment device includes an arc roller 12 located behind the second air nozzle 7, and a corrector 13, an adjustable groove roller 14, and a fixed groove roller 15 are sequentially arranged behind the arc roller 12. The corrector 13 is used to ensure that the pole piece is on the same horizontal straight line. The adjustable groove roller 14 is used to adjust the left and right height according to the state of the pole piece. The large wrap angle of the fixed groove roller 15 is used to increase the friction of the pole piece, which is convenient for the overall correction of the pole piece. The adjustment device is used to adjust the posture of the pole piece entering the water cooling part to avoid problems such as deviation and wrinkles in the pole piece.

[0038] like Figure 1As shown, the water cooling part includes at least one cooling roller, the pole piece is wound on the cooling roller, the cooling roller is connected to a circulating water cooling device, the cooling roller includes a first cooling roller 17 and a second cooling roller 22 arranged in sequence, the circulating water cooling device includes an inlet pipe 18 and a return pipe 19 connected to the first cooling roller 17 and the second cooling roller 22, a first water temperature control part 20 is provided between the inlet pipe 18 and the return pipe 19 connected to the first cooling roller 17, a second water temperature control part 21 is provided between the inlet pipe 18 and the return pipe 19 connected to the second cooling roller 22, a temperature control part is provided on the inlet pipe and the return pipe of the cooling roller, and the water inlet temperature of the inlet pipe can be controlled by controlling the water flow between the inlet pipe and the return pipe.

[0039] In addition, a third air nozzle 8 and a fourth air nozzle 9 are respectively provided on the outer side of the first cooling roller 17 and the second cooling roller 22. The first air nozzle 6, the second air nozzle 7, the third air nozzle 8 and the fourth air nozzle 9 are connected to a cold air source. The cold air source includes a blower 1 and a first air inlet pipe 2, a second air inlet pipe 3, a third air inlet pipe 4 and a fourth air inlet pipe 5 connected between the blower 1 and the first air nozzle 6 and the second air nozzle 7.

[0040] When the present invention is in use, the electrode 24 coming out of the electrode oven passes through the adjustable flat roller 10 and the threaded roller 11 in sequence, and at the same time, the first air nozzle 6 and the second air nozzle 7 are used to cool the two sides of the electrode 24. Then, the electrode 24 passes through the arc roller 12, the deviation corrector 13, the adjustable groove roller 14, and the fixed groove roller 15 in sequence. After shaping and deviation correction, the electrode 24 enters the shell 16 and is tensioned by the tension swing roller 23. After that, it passes through the first cooling roller 17 and the second cooling roller 22 in sequence. During the process of passing through the first cooling roller 17 and the second cooling roller 22, the cooling water is circulated through the cooling roller to cool the cooling water. The cooling water reduces the temperature of the cooling roller. The cooling roller contacts the electrode 24 and then reduces the temperature of the electrode, thereby completing the water cooling of the electrode 24. This embodiment reduces the electrode temperature in a graded and gradient-adjusted manner, which can achieve the cooling effect of electrodes of different temperatures and avoid the irreversible effect of sudden cooling on the quality of the electrode. At the same time, cooling the electrode temperature to room temperature can also reduce the risk of material shedding. It can also verify the correlation of the effects of different cooling temperatures on the pole pieces with the smallest possible changes, so as to cope with the cooling process of pole pieces of different material systems and complete high-temperature cooling of the pole pieces.

[0041] 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.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A pole piece cooling system, characterized in that: It includes an air cooling part and a water cooling part arranged behind the air cooling part; The air cooling part comprises a first air nozzle (6) and a second air nozzle (7) located on both sides of the pole piece, the air outlets of the first air nozzle (6) and the second air nozzle (7) are respectively directed towards the two sides of the pole piece, and the first air nozzle (6) and the second air nozzle (7) are connected to a cold air source; The water cooling part includes at least one cooling roller, the pole piece is wound around the cooling roller, and the cooling roller is connected to a circulating water cooling device.

2. A pole piece cooling system according to claim 1, characterized in that: The cold air source comprises a blower (1), and a first air inlet pipe (2) and a second air inlet pipe (3) connected between the blower (1) and the first air nozzle (6) and the second air nozzle (7).

3. The pole piece cooling system according to claim 1, characterized in that: An adjustable leveling roller (10) is provided at the air outlet of the first air nozzle (6), and the pole piece passes between the adjustable leveling roller (10) and the first air nozzle (6).

4. The pole piece cooling system according to claim 1, characterized in that: A threaded roller (11) is provided at the air outlet of the second air nozzle (7), and the pole piece passes between the threaded roller (11) and the second air nozzle (7).

5. The pole piece cooling system according to claim 1, characterized in that: An adjustment device is provided between the air cooling part and the water cooling part.

6. A pole piece cooling system according to claim 5, characterized in that: The adjustment device comprises an arc roller (12) located behind the second air nozzle (7), and a deviation corrector (13), an adjustable groove roller (14), and a fixed groove roller (15) are sequentially arranged behind the arc roller (12).

7. The pole piece cooling system according to claim 5, characterized in that: The water cooling part is arranged in the shell (16), the air cooling part and the regulating device are both located in the upper part of the shell (16), and a tension swing roller (23) for transmitting the pole piece is arranged between the air cooling part and the regulating device.

8. The pole piece cooling system according to claim 1, characterized in that: The cooling roller comprises a first cooling roller (17) and a second cooling roller (22) which are arranged in sequence, and the circulating water cooling device comprises a water inlet pipe (18) and a water return pipe (19) which are connected to the first cooling roller (17) and the second cooling roller (22).

9. A pole piece cooling system according to claim 8, characterized in that: A first water temperature control unit (20) is provided between the water inlet pipe (18) and the water return pipe (19) connected to the first cooling roller (17), and a second water temperature control unit (21) is provided between the water inlet pipe (18) and the water return pipe (19) connected to the second cooling roller (22).

10. The pole piece cooling system according to claim 8, characterized in that: A third air nozzle (8) and a fourth air nozzle (9) are respectively provided on the outside of the first cooling roller (17) and the second cooling roller (22); the third air nozzle (8) and the fourth air nozzle (9) are respectively connected to the cold air source through the third air inlet pipe (4) and the fourth air inlet pipe (5).

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