Battery pole piece cooling device, control method thereof and computer readable storage medium

Abstract

The invention discloses a battery pole piece cooling device, a control method thereof and a computer readable storage medium, the battery pole piece cooling device comprises a plurality of cooling rollers, and the control method comprises the following steps: obtaining the actual temperature of a battery pole piece; determining a target refrigerant flow according to the actual temperature and a preset target temperature; and performing refrigerant flow adjustment on at least one cooling roller in the plurality of cooling rollers based on the target refrigerant flow, so that the pole piece cooling device cools the battery pole piece to the target production temperature. Therefore, according to the method, the refrigerant flow is adjusted according to the actual temperature obtained in real time and the preset target temperature, so that the pole piece with the high temperature is rapidly and accurately reduced to the required target production temperature, the precision and accuracy of pole piece thickness detection are improved, and the quality stability of the subsequent machining process is improved; and meanwhile, the method can adapt to different belt conveying speeds, and the application range of the method is widened.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a control method for a battery pole piece cooling device, a computer-readable storage medium, and a battery pole piece cooling device. Background Art

[0002] In recent years, lithium batteries have become increasingly popular in both the consumer and new energy vehicle fields due to their high energy density, light weight and high safety. However, users' requirements for the performance and safety of lithium-ion batteries are also constantly increasing.

[0003] The manufacturing process of lithium-ion battery pole pieces includes slurrying, coating, rolling, slitting and tab cutting. The role of the rolling process is to make the active material of the pole piece denser after coating, increase the energy density of the lithium battery, and improve the adhesion with the current collector to improve the performance of the lithium battery. At present, in order to improve the consistency of the thickness of the pole piece after rolling and reduce the probability of the pole piece breaking during the rolling process, the hot rolling process is often used. However, the high temperature of the lithium battery pole piece after hot rolling will affect the detection accuracy of the pole piece surface density and rolling thickness, as well as the consistency of the quality of the subsequent processing process.

[0004] In the related art, the pole piece is cooled by natural cooling or wind blowing, but the cooling effect of this technical solution is limited and it is easy to generate dust pollution. In addition, there is also a solution of using cooling rollers to cool the pole piece. This method is simple to control, but it is difficult to reduce the pole piece temperature to the desired value. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present application is to propose a control method for a battery pole piece cooling device, which adjusts the refrigerant flow rate according to the actual temperature obtained in real time and the preset target temperature, so as to quickly and accurately reduce the pole piece with a higher temperature to the required target production temperature, so as to improve the precision and accuracy of the pole piece thickness detection and the stability of the quality of the subsequent processing process, and at the same time can adapt to different belt speeds, thereby expanding the scope of application of the method.

[0006] A second object of the present application is to provide a computer-readable storage medium.

[0007] The third objective of the present application is to provide a battery pole piece cooling device.

[0008] To achieve the above-mentioned purpose, the first aspect embodiment of the present application proposes a control method for a battery pole piece cooling device, the battery pole piece cooling device includes a plurality of cooling rollers, the plurality of cooling rollers are arranged in sequence according to a preset direction, and are used to limit the transmission path of the battery pole piece, and cool the battery pole piece based on the refrigerant flowing through the inside, the control method of the battery pole piece cooling device includes: obtaining the actual temperature of the battery pole piece; determining the target refrigerant flow rate according to the actual temperature and the preset target temperature; adjusting the refrigerant flow rate of at least one cooling roller among the plurality of cooling rollers based on the target refrigerant flow rate, so that the pole piece cooling device can cool the battery pole piece to the target production temperature.

[0009] According to the control method of the battery pole piece cooling device of the embodiment of the present application, the battery pole piece cooling device includes a plurality of cooling rollers, which are arranged in sequence according to a preset direction, and are used to limit the transmission path of the battery pole piece, and cool the battery pole piece based on the refrigerant flowing inside. The control method of the battery pole piece cooling device first obtains the actual temperature of the battery pole piece, and then determines the target refrigerant flow rate according to the actual temperature and the preset target temperature, and adjusts the refrigerant flow rate of at least one cooling roller among the plurality of cooling rollers based on the target refrigerant flow rate, so that the pole piece cooling device cools the battery pole piece to the target production temperature. Therefore, the method adjusts the refrigerant flow rate according to the actual temperature obtained in real time and the preset target temperature, so as to quickly and accurately reduce the pole piece with a higher temperature to the required target production temperature, so as to improve the precision and accuracy of the pole piece thickness detection, and the stability of the quality of the subsequent processing process, and can adapt to different belt speeds, expanding the scope of application of the method.

[0010] In addition, the control method of the battery pole piece cooling device according to the above embodiment of the present application may also have the following additional technical features:

[0011] According to one embodiment of the present application, the target refrigerant flow rate is determined according to the actual temperature and the preset target temperature, including: obtaining the temperature difference between the actual temperature and the preset target temperature; determining the target refrigerant flow rate according to the temperature difference and a preset relationship, wherein the preset relationship is used to characterize the mapping relationship between the temperature difference and the target refrigerant flow rate.

[0012] According to an embodiment of the present application, the control method of the battery pole piece cooling device further includes: determining a preset target temperature based on a location where the actual temperature is obtained.

[0013] According to one embodiment of the present application, the temperature of the refrigerant flowing through each cooling roller is gradually reduced along the transmission path of the battery pole piece.

[0014] To achieve the above-mentioned purpose, the second aspect embodiment of the present application proposes a computer-readable storage medium, on which a control program of a battery pole piece cooling device is stored. When the control program of the battery pole piece cooling device is executed by a processor, the control method of the battery pole piece cooling device is implemented.

[0015] According to the computer-readable storage medium of the embodiment of the present application, the control program of the battery pole piece cooling device implements the above-mentioned control method of the battery pole piece cooling device when executed by the processor. Based on the above-mentioned control method, the refrigerant flow rate can be adjusted according to the actual temperature obtained in real time and the preset target temperature, so as to quickly and accurately reduce the pole piece with a higher temperature to the required target production temperature, so as to improve the precision and accuracy of the pole piece thickness detection and the stability of the quality of the subsequent processing process. At the same time, it can adapt to different belt speeds, thereby expanding the scope of application of the method.

[0016] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes a battery pole piece cooling device, comprising: a plurality of cooling rollers, which are arranged in sequence according to a preset conveying direction, and are used to limit the conveying path of the battery pole piece, and cool the battery pole piece based on the refrigerant flowing inside; at least one temperature detection module, used to obtain the actual temperature of the battery pole piece; a controller, used to determine the target refrigerant flow rate according to the actual temperature and the preset target temperature, and adjust the refrigerant flow rate of at least one cooling roller among the plurality of cooling rollers based on the target refrigerant flow rate, so that the pole piece cooling device can cool the battery pole piece to the target production temperature.

[0017] According to the battery pole piece cooling device of the embodiment of the present application, a plurality of cooling rollers are arranged in sequence according to a preset transmission direction, which are used to limit the transmission path of the battery pole piece, and cool the battery pole piece based on the refrigerant flowing inside, at least one temperature detection module is used to obtain the actual temperature of the battery pole piece, and the controller determines the target refrigerant flow rate according to the actual temperature and the preset target temperature, and adjusts the refrigerant flow rate of at least one cooling roller among the plurality of cooling rollers based on the target refrigerant flow rate, so that the pole piece cooling device cools the battery pole piece to the target production temperature. Thus, the device adjusts the refrigerant flow rate according to the actual temperature obtained in real time and the preset target temperature, so as to quickly and accurately reduce the pole piece with a higher temperature to the required target production temperature, so as to improve the precision and accuracy of the pole piece thickness detection, and the stability of the quality of the subsequent processing process, and at the same time can adapt to different belt speeds, expanding the scope of application of the method.

[0018] In addition, the battery pole piece cooling device according to the above embodiment of the present application may also have the following additional technical features:

[0019] According to one embodiment of the present application, the temperature of the refrigerant flowing through each cooling roller is gradually reduced along the transmission path of the battery pole piece.

[0020] According to one embodiment of the present application, the battery pole piece cooling device also includes: a plurality of guide rollers, which are arranged on both sides of the plurality of cooling rollers along a preset conveying direction and are used to cooperate with the plurality of cooling rollers to limit the conveying path of the battery pole piece.

[0021] According to one embodiment of the present application, the battery pole piece cooling device further includes: an air cooling box, which is used to pre-cool the battery pole piece by air before the battery pole piece reaches the multiple cooling rollers.

[0022] According to one embodiment of the present application, the air-cooled box includes: a negative pressure adsorption module for negative pressure suction and exhaust of dust from the air-cooled box and the battery pole pieces.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A connection diagram of a battery pole piece cooling device according to an embodiment of the present application;

[0025] Figure 2 is a flow chart of a control method of a battery pole piece cooling device according to an embodiment of the present application;

[0026] Figure 3 It is a flow chart of a control method of a battery pole piece cooling device according to a specific embodiment of the present application;

[0027] Figure 4 A schematic diagram of the connection of a battery pole piece cooling device according to an embodiment of the present application;

[0028] Figure 5 It is a connection diagram of a battery pole piece cooling device according to one embodiment of the present application. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0030] The following describes a control method for a battery pole piece cooling device, a computer-readable storage medium, and a battery pole piece cooling device proposed in an embodiment of the present application with reference to the accompanying drawings.

[0031] In one embodiment of the present application, a battery pole piece cooling device includes a plurality of cooling rollers, which are arranged in sequence in a preset direction, and are used to limit a conveying path of the battery pole piece and cool the battery pole piece based on a refrigerant flowing therein.

[0032] Specifically, the battery pole piece cooling device has multiple cooling rollers, wherein the cooling roller has an inlet and outlet cavity flow channel for accommodating a cooling fluid medium, i.e., a refrigerant, along its axial direction, and a flow regulating control valve is arranged in the middle of the cooling fluid medium entering the pipeline, such as Figure 1 As shown, multiple cooling rollers are arranged in two rows from left to right and staggered with each other up and down. The battery pole pieces to be cooled pass through each cooling roller from top to bottom in turn and contact with its surface, so that the transmission path of the battery pole pieces is limited by the cooling rollers, and the battery pole pieces are cooled by heat exchange between the battery pole pieces and the refrigerant flowing through the inside.

[0033] For example, if Figure 1 As shown, it is assumed that the battery pole piece cooling device includes three cooling rollers arranged alternately up and down, which are represented by A1, A2, and A3 respectively. The cooling roller A1 is provided with a cooling fluid medium inlet and outlet pipe B1, and a control valve C1 is arranged at the inlet of the cooling fluid medium inlet and outlet pipe B1; the cooling roller A2 is provided with a cooling fluid medium inlet and outlet pipe B2, and a control valve C2 is arranged at the inlet of the cooling fluid medium inlet and outlet pipe B2; the cooling roller A3 is provided with a cooling fluid medium inlet and outlet pipe B3, and a control valve C3 is arranged at the inlet of the cooling fluid medium inlet and outlet pipe B3.

[0034] like Figure 2 As shown, the control method of the battery pole piece cooling device in the embodiment of the present application may include the following steps:

[0035] S1, obtain the actual temperature of the battery electrode;

[0036] S2, determining the target refrigerant flow rate according to the actual temperature and the preset target temperature;

[0037] S3, adjusting the refrigerant flow rate of at least one cooling roller among the multiple cooling rollers based on the target refrigerant flow rate, so that the electrode cooling device cools the battery electrode to the target production temperature.

[0038] Specifically, the actual temperature of the battery electrode can be obtained by a temperature detection module corresponding to the battery electrode. For example, the temperature detection module can be set corresponding to the cooling roller. Figure 1As shown, a temperature detection module (D1, D2, D3) is respectively provided for each cooling roller, and the actual temperature of the battery pole piece cooled by the cooling roller A1 is acquired through the temperature detection module D1, the actual temperature of the battery pole piece cooled by the cooling roller A2 is acquired through the temperature detection module D2, and the actual temperature of the battery pole piece cooled by the cooling roller A3 is acquired through the temperature detection module D3; in addition, a temperature detection module may be provided in front of the cooling roller A1 to acquire the actual temperature of the battery pole piece entering the battery pole piece cooling device for subsequent refrigerant flow control.

[0039] Then, the actual temperature is compared with the preset target temperature to calculate the target refrigerant flow rate based on the actual temperature and the preset target temperature, so as to adjust the refrigerant flow rate of at least one cooling roller according to the target refrigerant flow rate. It can be understood that the target refrigerant flow rate can be determined based on the position where the actual temperature is obtained and the relative position of the cooling roller, and the opening of the control valves corresponding to different cooling rollers can be adjusted with different flow values, or the opening of the control valves corresponding to different cooling rollers can be adjusted with the same flow value. For example, the temperature detection module D1 obtains the actual temperature t1, and the preset target temperature is T1. Assuming that the actual temperature t1 is higher than the preset target temperature T1, the refrigerant flow corresponding to the cooling roller A1 is increased by △l, and the sum of the current refrigerant flow corresponding to the cooling roller A1 and △l is obtained to obtain the target refrigerant flow. The corresponding target valve opening is determined based on the target refrigerant flow, and the opening of the control valve C1 is adjusted to the target valve opening to increase the refrigerant flow of the cooling roller A1. The cooling effect is improved, so that the actual temperature t1 obtained by the temperature detection module D1 reaches the preset target temperature T1; and so on, until the temperature of the battery electrode output by the electrode cooling device drops to the target production temperature.

[0040] In addition, in addition to adjusting the refrigerant flow of the cooling roller before the temperature detection module, the refrigerant flow of the cooling roller after the temperature detection module can also be adjusted, and the number of cooling rollers to be adjusted is not limited. Further, in the embodiment of adjusting the refrigerant flow of multiple cooling rollers at the same time, the refrigerant flow adjustment amount of the cooling roller closer to the temperature detection module can be set to the maximum, and the refrigerant flow adjustment amount of the cooling roller farther away can be set to the minimum, that is, gradually reduced.

[0041] In addition, the target refrigerant flow rate can also be set in combination with the pole piece transmission speed. When the transmission speed is equal to the preset speed, the target refrigerant flow rate determined based on the temperature is adjusted; when the transmission speed is lower than the preset speed, the target refrigerant flow rate determined based on the temperature can be reduced by setting a coefficient to prevent the transmission speed from being too slow, resulting in a longer heat exchange time, and causing excessive cooling of the pole piece; when the transmission speed is greater than the preset transmission speed, the preset adjustment amount can be increased by setting a coefficient to prevent the transmission speed from being too fast, resulting in a shorter heat exchange time, and causing poor cooling effect of the pole piece, thereby ensuring the cooling effect of the pole piece.

[0042] This embodiment adjusts the refrigerant flow rate of at least one cooling roller based on the actual temperature and the preset target temperature, so as to increase the refrigerant flow rate when the actual temperature is higher than the preset target temperature, and reduce the refrigerant flow rate when the actual temperature is lower than the preset target temperature, so that the electrode cooling device can cool the battery electrode to the target production temperature, avoiding the influence of excessively high or low electrode temperature on production quality, so as to meet subsequent production needs.

[0043] According to one embodiment of the present application, the target refrigerant flow rate is determined according to the actual temperature and the preset target temperature, including: obtaining the temperature difference between the actual temperature and the preset target temperature; determining the target refrigerant flow rate according to the temperature difference and a preset relationship, wherein the preset relationship is used to characterize the mapping relationship between the temperature difference and the target refrigerant flow rate.

[0044] Specifically, the preset relationship can be a calculation formula or a preset table, which is determined based on experiments. Taking the preset relationship as a preset table as an example, after obtaining the actual temperature, the temperature difference between the actual temperature and the preset target temperature is calculated, and the target refrigerant flow rate is obtained by looking up the table. Among them, the target refrigerant flow rate corresponding to each temperature difference can be a different refrigerant flow rate corresponding to different cooling rollers, can be only the refrigerant flow rate corresponding to the previous cooling roller, or can be only the refrigerant flow rate corresponding to the next cooling roller, without specific limitation. In addition, the target refrigerant flow rate can be a refrigerant adjustment amount, such as a refrigerant increase or a refrigerant decrease.

[0045] According to an embodiment of the present application, the control method of the battery pole piece cooling device further includes: determining a preset target temperature based on a location where the actual temperature is obtained.

[0046] Specifically, Figure 1 For example, a different preset target temperature is set for each temperature detection module. For example, the preset target temperature of temperature detection module A is 55°C, the preset target temperature of temperature detection module A is 50°C, and the preset target temperature of temperature detection module A is 40°C, so as to ensure the cooling effect of the battery electrode.

[0047] According to one embodiment of the present application, the temperature of the refrigerant flowing through each cooling roller is gradually reduced along the transmission path of the battery pole piece.

[0048] Specifically, continue with Figure 1 For example, the conveying path of the battery electrode is cooling roller A1→cooling roller A2→cooling roller A3. Assume that the refrigerant temperature in cooling roller A1 is 18-25°C, the refrigerant temperature in cooling roller A2 is 12-18°C, and the refrigerant temperature in cooling roller A3 is 7-12°C.

[0049] As a specific embodiment of the present application, Figure 3 As shown, the control method of the battery pole piece cooling device may include the following steps:

[0050] S101, obtaining the actual temperature of the battery electrode.

[0051] S102, determining a preset target temperature according to a location where the actual temperature is obtained.

[0052] S103, obtaining a temperature difference between the actual temperature and the preset target temperature.

[0053] S104, obtaining the target refrigerant flow rate by looking up a table.

[0054] S105, based on the target refrigerant flow rate, controlling the opening of a control valve corresponding to at least one cooling roller among the multiple cooling rollers to adjust the refrigerant flow rate so that the electrode cooling device cools the battery electrode to the target production temperature.

[0055] In summary, according to the control method of the battery pole piece cooling device of the embodiment of the present application, the battery pole piece cooling device includes a plurality of cooling rollers, which are arranged in sequence according to a preset direction, and are used to limit the transmission path of the battery pole piece, and cool the battery pole piece based on the refrigerant flowing inside. The control method of the battery pole piece cooling device first obtains the actual temperature of the battery pole piece, and then determines the target refrigerant flow rate according to the actual temperature and the preset target temperature, and adjusts the refrigerant flow rate of at least one of the plurality of cooling rollers based on the target refrigerant flow rate, so that the pole piece cooling device cools the battery pole piece to the target production temperature. Therefore, the method adjusts the refrigerant flow rate according to the actual temperature obtained in real time and the preset target temperature, so as to quickly and accurately reduce the pole piece with a higher temperature to the required target production temperature, so as to improve the precision and accuracy of the pole piece thickness detection, and the stability of the quality of the subsequent processing process, and can adapt to different belt speeds, expanding the scope of application of the method.

[0056] Corresponding to the above embodiments, the present application also proposes a computer-readable storage medium.

[0057] The computer-readable storage medium of the embodiment of the present application stores a control program for a battery pole piece cooling device, and when the control program for the battery pole piece cooling device is executed by a processor, the control method for the battery pole piece cooling device described above is implemented.

[0058] According to the computer-readable storage medium of the embodiment of the present application, the control program of the battery pole piece cooling device implements the above-mentioned control method of the battery pole piece cooling device when executed by the processor. Based on the above-mentioned control method, the refrigerant flow rate is adjusted according to the actual temperature obtained in real time and the preset target temperature, so as to quickly and accurately reduce the pole piece with a higher temperature to the required target production temperature, so as to improve the precision and accuracy of the pole piece thickness detection and the stability of the quality of the subsequent processing process. At the same time, it can adapt to different belt conveying speeds, thereby expanding the scope of application of the method.

[0059] Corresponding to the above-mentioned embodiments, the present application also proposes a battery pole piece cooling device.

[0060] like Figure 4 As shown, the battery electrode cooling device of the embodiment of the present application includes: a plurality of cooling rollers 10, which are arranged in sequence according to a preset conveying direction, and are used to limit the conveying path of the battery electrode 200, and cool the battery electrode 200 based on the refrigerant flowing therethrough; at least one temperature detection module 20, used to obtain the actual temperature of the battery electrode 200; a controller 30, used to determine the target refrigerant flow rate according to the actual temperature and the preset target temperature, and adjust the refrigerant flow rate of at least one cooling roller 10 among the plurality of cooling rollers 10 based on the target refrigerant flow rate, so that the electrode cooling device can cool the battery electrode 200 to the target production temperature.

[0061] Specifically, the battery electrode cooling device has a plurality of cooling rollers 10, wherein the cooling roller 10 has a pipeline for containing a cooling fluid medium, i.e., a refrigerant, along its axial direction, and a flow regulating control valve is arranged in the middle of the pipeline where the cooling fluid medium enters, for example Figure 1 As shown, multiple cooling rollers (A1, A2, A3) are arranged in two rows from left to right and staggered up and down. The battery pole pieces to be cooled pass through each cooling roller from top to bottom and contact with the surface, so that the transmission path of the battery pole pieces is limited by the cooling rollers, and the battery pole pieces are cooled by heat exchange between the battery pole pieces and the refrigerant flowing through the inside. Figure 1For example, the battery pole piece cooling device includes three cooling rollers arranged alternately up and down, which are represented by A1, A2, and A3 respectively. The cooling roller A1 is provided with a cooling fluid medium inlet and outlet pipe B1, and a control valve C1 is arranged at the inlet of the cooling fluid medium inlet and outlet pipe B1; the cooling roller A2 is provided with a cooling fluid medium inlet and outlet pipe B2, and a control valve C2 is arranged at the inlet of the cooling fluid medium inlet and outlet pipe B2; the cooling roller A3 is provided with a cooling fluid medium inlet and outlet pipe B3, and a control valve C3 is arranged at the inlet of the cooling fluid medium inlet and outlet pipe B3.

[0062] The temperature detection module 20 is arranged corresponding to the battery electrode 200 to obtain the actual temperature of the battery electrode 200. For example, the temperature detection module 20 is arranged corresponding to each cooling roller 10, such as Figure 1 As shown, a temperature detection module (D1, D2, D3) is respectively provided for each cooling roller, and the actual temperature of the battery pole piece 200 cooled by the cooling roller A1 is obtained by the temperature detection module D1, the actual temperature of the battery pole piece 200 cooled by the cooling roller A2 is obtained by the temperature detection module D2, and the actual temperature of the battery pole piece 200 cooled by the cooling roller A3 is obtained by the temperature detection module D3; in addition, a temperature detection module 20 can be provided in front of the cooling roller A1 to obtain the actual temperature of the battery pole piece entering the battery pole piece cooling device for subsequent refrigerant flow control. It can be understood that the temperature detection module 20 can be formed by a temperature sensor.

[0063] The controller 30 is connected to the temperature detection module 20 and each control valve. The temperature detection module 20 feeds back the measured actual temperature of the battery pole piece to the controller 30, and then the controller 30 compares the difference between the preset target temperature and the actually measured temperature, and calculates the required refrigerant flow, i.e., the target refrigerant flow, by an internal program, and sends a signal to the control valve to adjust the refrigerant flow entering the internal cavity of the corresponding cooling roller 10 in real time, so as to adjust the temperature of the battery pole piece after passing through the cooling roller.

[0064] According to one embodiment of the present application, the temperature of the refrigerant flowing through each cooling roller 10 is gradually reduced along the transmission path of the battery electrode.

[0065] That is to say, each cooling roller 10 is respectively fed with a refrigerant of different temperature. Figure 1 For example, the conveying path of the battery electrode is cooling roller A1→cooling roller A2→cooling roller A3, then the refrigerant temperature in cooling roller A1 is 18-25°C, the refrigerant temperature in cooling roller A2 is 12-18°C, and the refrigerant temperature in cooling roller A3 is 7-12°C.

[0066] According to one embodiment of the present application, the battery pole piece cooling device also includes: a plurality of guide rollers, which are arranged on both sides of the plurality of cooling rollers along a preset conveying direction and are used to cooperate with the plurality of cooling rollers to limit the conveying path of the battery pole piece.

[0067] Specifically, Figure 5 For example, the battery pole piece cooling device includes three guide rollers, namely guide roller E1, guide roller E2 and guide roller E3, wherein guide roller E1 and guide roller E2 are placed horizontally and parallel, and the battery pole piece 200 after being rolled by the hot roller enters through one side of guide roller E1, and enters cooling rollers A1, A2, A3 through guide roller E2, and finally enters the pole piece detection device through guide roller E3.

[0068] According to one embodiment of the present application, the battery pole piece cooling device further includes: an air cooling box, which is used to pre-cool the battery pole piece by air before the battery pole piece reaches the multiple cooling rollers.

[0069] Specifically, continue to combine Figure 5 As shown, the air cooling box F1 has gas flow medium entering from the top and bottom and blowing toward the surface of the pole piece for pre-cooling. Among them, the battery pole piece after being rolled by the hot roller enters from one side of the air cooling box F1 through the guide roller E1, exits from the other side and enters the cooling roller (A1, A2, A3) through the guide roller E2, and finally enters the pole piece detection device through the guide roller E3.

[0070] According to one embodiment of the present application, the air-cooled box includes: a negative pressure adsorption module for negative pressure suction and exhaust of dust from the air-cooled box and the battery pole pieces.

[0071] That is to say, there are negative pressure adsorption pipes on both sides of the air-cooling box F1 to absorb the dust therein, thereby reducing dust pollution.

[0072] As a specific embodiment of the present application, Figure 5 The battery pole piece cooling device comprises guide rollers (E1, E2, E3), an air cooling box A1, a plurality of cooling rollers (A1, A2, A3), cooling fluid medium inlet and outlet pipes (B1, B2, B3), control valves (C1, C2, C3), and temperature detection modules (D1, D2, D3). The guide rollers have a diameter of 150-250 mm, are made of aluminum with hard chrome plating, and are made of stainless steel with a diameter of 500-700 mm.

[0073] After the hot roller is rolled, the surface temperature of the pole piece is 50-60℃. The air cooling temperature provided by the air cooling box A1 is the same as the room temperature. The temperature of the pole piece after passing through the air cooling box is 50-55℃. The cooling fluid medium of the cooling roller A1 is cooling water at 18-25℃. The temperature of the pole piece after passing through the cooling roller A1 is reduced to 40-50℃, that is, the preset target temperature corresponding to the temperature detection module D1 is 40-50℃. The cooling fluid medium of the cooling roller A1 is cooling water at 12-18℃. The temperature of the pole piece after passing through the cooling roller A2 is reduced to 30-40℃, that is, the preset target temperature corresponding to the temperature detection module D2 is 30-40℃; the cooling fluid medium of the cooling roller A3 is cooling water at 7-12℃. After the pole piece passes through the cooling roller A3, the final temperature of the pole piece is controlled to 25-30℃, that is, the preset target temperature corresponding to the temperature detection module D3 is 25-30℃, and the target production temperature is also 25-30℃.

[0074] During the cooling process, the temperature detection module after each cooling roller feeds back the measured electrode temperature to the controller. The controller then compares the set electrode temperature with the actual measured temperature difference, and calculates the required cooling water flow rate by the internal program. The controller sends a signal to the automatic control valve to adjust the flow rate of cooling water entering the internal cavity of the cooling roller in real time. After cooling by multiple cooling rollers, the electrode temperature reaches the temperature of the electrode after adjusting the cooling roller, so that the final battery electrode temperature meets production requirements.

[0075] It should be noted that for details not disclosed in the battery pole piece cooling device of the embodiment of the present application, please refer to the details disclosed in the battery pole piece cooling method of the above embodiment of the present application, and the details will not be repeated here.

[0076] In summary, according to the battery pole piece cooling device of the embodiment of the present application, a plurality of cooling rollers are arranged in sequence according to a preset transmission direction, which are used to limit the transmission path of the battery pole piece, and cool the battery pole piece based on the refrigerant flowing inside, at least one temperature detection module is used to obtain the actual temperature of the battery pole piece, and the controller determines the target refrigerant flow rate according to the actual temperature and the preset target temperature, and adjusts the refrigerant flow rate of at least one cooling roller among the plurality of cooling rollers based on the target refrigerant flow rate, so that the pole piece cooling device cools the battery pole piece to the target production temperature. Thus, the device adjusts the refrigerant flow rate according to the actual temperature obtained in real time and the preset target temperature, so as to quickly and accurately reduce the pole piece with a higher temperature to the required target production temperature, so as to improve the precision and accuracy of the pole piece thickness detection, and the stability of the quality of the subsequent processing process, and can adapt to different belt speeds, expanding the scope of application of the method.

[0077] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0078] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0081] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0082] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A control method for a battery pole piece cooling device, characterized in that: The battery pole piece cooling device includes a plurality of cooling rollers, which are arranged in sequence according to a preset direction, and are used to define a conveying path of the battery pole piece, and cool the battery pole piece based on a refrigerant flowing therethrough. The method includes: Obtaining the actual temperature of the battery electrode; Determine a target refrigerant flow rate according to the actual temperature and a preset target temperature; The refrigerant flow rate of at least one cooling roller among the plurality of cooling rollers is adjusted based on the target refrigerant flow rate, so that the pole piece cooling device cools the battery pole piece to a target production temperature.

2. The control method of the battery pole piece cooling device according to claim 1, characterized in that: The determining the target refrigerant flow rate according to the actual temperature and the preset target temperature includes: Obtaining a temperature difference between the actual temperature and a preset target temperature; A target refrigerant flow rate is determined according to the temperature difference and a preset relationship, wherein the preset relationship is used to characterize a mapping relationship between the temperature difference and the target refrigerant flow rate.

3. The control method of the battery pole piece cooling device according to claim 2, characterized in that: The method further comprises: The preset target temperature is determined based on the acquisition position of the actual temperature.

4. The control method of the battery pole piece cooling device according to claim 1, characterized in that: The temperature of the refrigerant flowing through each cooling roller decreases step by step along the transmission path of the battery pole piece.

5. A computer-readable storage medium, characterized in that: A control program of a battery pole piece cooling device is stored thereon, and when the control program of the battery pole piece cooling device is executed by a processor, a control method of a battery pole piece cooling device according to any one of claims 1-4 is implemented.

6. A battery pole piece cooling device, characterized in that: include: A plurality of cooling rollers, the plurality of cooling rollers are arranged in sequence according to a preset conveying direction, and are used to define a conveying path of the battery pole piece, and cool the battery pole piece based on a refrigerant flowing therethrough; At least one temperature detection module, used to obtain the actual temperature of the battery electrode; A controller is used to determine a target refrigerant flow rate according to the actual temperature and a preset target temperature, and to adjust the refrigerant flow rate of at least one cooling roller among the multiple cooling rollers according to the target refrigerant flow rate, so that the pole piece cooling device can cool the battery pole piece to a target production temperature.

7. The battery pole piece cooling device according to claim 6, characterized in that: The temperature of the refrigerant flowing through each cooling roller decreases step by step along the transmission path of the battery pole piece.

8. The battery pole piece cooling device according to claim 6, characterized in that: The device also includes: A plurality of guide rollers are arranged on both sides of the plurality of cooling rollers along the preset conveying direction, and are used to cooperate with the plurality of cooling rollers to define a conveying path for the battery electrode sheet.

9. The battery pole piece cooling device according to claim 8, characterized in that: The device also includes: The air cooling box is used to pre-cool the battery pole piece with air before the battery pole piece reaches the plurality of cooling rollers.

10. The battery pole piece cooling device according to claim 9, characterized in that: The air cooling box comprises: The negative pressure adsorption module is used to perform negative pressure suction and exhaust of dust from the air cooling box and the battery pole piece.

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