Battery electrode coating system

Abstract

The utility model relates to a battery electrode coating system, and belongs to the technical field of waste gas recovery, the battery electrode coating system comprises a plurality of coating oven modules, a plurality of heat exchange recovery modules, a heat pump module and a tail gas treatment module, the plurality of heat exchange recovery modules and the plurality of rows of coating oven modules are arranged in a one-to-one correspondence manner; the heat exchange recovery module is used for cooling the high-temperature waste gas twice and heating the input gas flowing to the coating oven module twice, and the heat exchange recovery module exchanges heat between the high-temperature waste gas and the input gas, so that the first cooling of the high-temperature waste gas and the first heating of the input gas are realized; and the heat pump module is used for carrying out heat conversion between secondary cooling and secondary heating. According to the battery electrode coating system provided by the invention, heat conversion can be carried out between secondary cooling and secondary heating, low-temperature and high-temperature energy conversion is realized, the energy utilization rate is improved, energy is saved, and the energy consumption of the system is reduced.

Description

Technical Field

[0001] This application relates to the technical field of waste gas recovery, and particularly to a battery electrode coating system. Background Art

[0002] In the field of lithium battery manufacturing technology, a large amount of high-temperature waste gas is generated during the coating production process of the positive electrode coater. The waste gas contains harmful volatile organic compounds such as NMP. Therefore, an NMP recovery system is required to recover and process NMP. The recovered NMP waste liquid is packaged and sent to a qualified chemical factory for processing. After processing, high-purity NMP products are obtained. At the same time, the treated NMP waste gas is discharged into the atmosphere at high altitude after meeting the environmental protection requirements. The treatment process of the existing NMP high-temperature waste gas recovery system is waste heat recovery, condensation, 95% return air and 5% wheel treatment before external discharge. The traditional coating system mainly uses natural gas combustion to generate steam for heating and industrial chillers to produce chilled water, resulting in relatively high energy consumption. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a battery electrode coating system to solve the technical problem of high energy consumption in the existing battery electrode coating system.

[0004] To achieve the above object, this application provides a battery electrode coating system, which includes:

[0005] Multiple coating oven modules, arranged in multiple rows, and the coating oven modules are used to dry the battery electrodes and discharge high-temperature waste gas;

[0006] Multiple heat exchange and recovery modules, arranged in one-to-one correspondence with the multiple rows of coating oven modules. The heat exchange and recovery modules are used to cool the high-temperature waste gas twice and heat the input gas flowing to the coating oven modules twice. The heat exchange and recovery modules exchange heat between the high-temperature waste gas and the input gas to achieve the first cooling of the high-temperature waste gas and the first heating of the input gas. After the high-temperature waste gas is cooled twice, low-temperature waste gas is formed.

[0007] A heat pump module, used for heat conversion between the second cooling and the second heating; and a tail gas treatment module, used to receive and treat the low-temperature waste gas discharged from the heat exchange and recovery module.

[0008] Optionally, the heat exchange and recovery module includes:

[0009] A gas-gas heat exchanger, having a first gas channel and a second gas channel. The high-temperature waste gas in the first gas channel exchanges heat with the input gas in the second gas channel to achieve the first cooling of the high-temperature waste gas and the first heating of the input gas;

[0010] A condensing main unit, connected to the outlet of the first gas channel, is used for cooling the high-temperature waste gas for the second time. A first circulation flow path is formed between the condensing main unit and the heat pump module so that the refrigerant of the heat pump module can be transported to the condensing main unit; and

[0011] A first heater, connected to the outlet of the second gas channel, is used for heating the input gas for the second time. A second circulation flow path is formed between the first heater and the heat pump module so that the heat medium of the heat pump module can be transported to the first heater.

[0012] Optionally, the refrigerant in the first circulation flow path is chilled water.

[0013] Optionally, the heat medium in the second circulation flow path is heat-conducting oil or high-temperature hot water.

[0014] Optionally, the outlet of the condensing main unit is respectively communicated with the inlet of the second gas channel and the tail gas treatment module. Part of the low-temperature waste gas is transported to the inlet of the second gas channel to form the input gas, and the remaining low-temperature waste gas is transported to the tail gas treatment module.

[0015] Optionally, the first heater is arranged in the coating oven module.

[0016] Optionally, among the multiple coating oven modules in each row, the temperatures of the multiple coating oven modules increase from both ends to the middle.

[0017] Optionally, the heat exchange recovery module further includes a second heater, which is arranged in the middle coating oven module and is used for heating the input gas output by the first heater for the third time.

[0018] Optionally, the second heater uses high-temperature steam or high-temperature heat-conducting oil to heat the input gas output by the first heater for the third time, or the second heater uses electromagnetic heating to heat the heat medium in the first heater.

[0019] Optionally, the heat pump module includes:

[0020] An evaporative condenser;

[0021] A refrigerant preparation module, including a circulating evaporator, a first compressor and a first expansion valve. A first circulation flow path is formed between the circulating evaporator and the condensing main unit. The circulating evaporator, the first compressor, the evaporative condenser and the first expansion valve are sequentially communicated to form a third circulation flow path;

[0022] A heat medium preparation module, including a circulating condenser, a second expansion valve and a second compressor. A second circulation flow path is formed between the circulating condenser and the first heater. The circulating condenser, the second expansion valve, the evaporative condenser and the second compressor are sequentially communicated to form a fourth circulation flow path. Heat exchange is carried out between the third circulation flow path and the fourth circulation flow path through the evaporative condenser.

[0023] The beneficial effects of the battery electrode coating system provided by this application are as follows: Compared with the prior art, the battery electrode coating system of this application includes multiple coating oven modules, multiple heat exchange and recovery modules, a heat pump module, and an exhaust gas treatment module. The heat exchange and recovery module is used to cool the high-temperature exhaust gas twice and heat the input gas flowing to the coating oven module twice. The heat exchange and recovery module exchanges heat between the high-temperature exhaust gas and the input gas to achieve the first cooling of the high-temperature exhaust gas and the first heating of the input gas. After the high-temperature exhaust gas is cooled twice, it forms low-temperature exhaust gas. Compared with the prior art of using natural gas combustion to generate steam for heating and equipped with a dedicated chiller to provide chilled water for cooling, the heat pump module can perform heat conversion between the second cooling and the second heating, realizing the energy conversion between low temperature and high temperature, improving the energy utilization rate, saving energy, and reducing the system energy consumption. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Structural schematic diagram of the battery electrode coating system provided by the embodiment of this application;

[0026] Figure 2 Structural schematic diagram of the coating oven module of the battery electrode coating system provided by the embodiment of this application that only has the first heater;

[0027] Figure 3 Structural schematic of the coating oven module of the battery electrode coating system provided by the embodiment of this application that has the first heater and the second heater Figure 1 ;

[0028] Figure 4 Structural schematic of the coating oven module of the battery electrode coating system provided by the embodiment of this application that has the first heater and the second heater Figure 2 ;

[0029] Figure 5 Structural schematic diagram of the heat exchange and recovery module of the battery electrode coating system provided by the embodiment of this application;

[0030] Figure 6 Structural schematic diagram of the heat pump module of the battery electrode coating system provided by the embodiment of this application.

[0031] Description of the reference numerals:

[0032] 1. Coating Oven Module; 110. Oven Body; 111. First Exhaust Port; 112. Second Exhaust Port; 113. Intake Port; 120. First Exhaust Fan; 130. Circulation Fan;

[0033] 2. Heat Exchange Recovery Module; 210. Air-Air Heat Exchanger; 220. Condensing Main Unit; 221. Refrigerant Cooling Coil; 222. Demister; 230. First Heater; 240. Second Heater; 250. Second Exhaust Fan; 260. Return Air Fan; 270. Medium Efficiency Filter; 280. Waste Liquid Storage Tank;

[0034] 3. Heat Pump Module; 310. Evaporative Condenser; 320. Refrigerant Preparation Module; 321. Circulating Evaporator; 322. First Compressor; 323. First Expansion Valve; 330. Heat Medium Preparation Module; 331. Circulating Condenser; 332. Second Expansion Valve; 333. Second Compressor; 340. High Temperature Buffer Tank; 350. Liquid Supplying Device; 360. Low Temperature Buffer Tank;

[0035] 4. Tail Gas Treatment Module. Detailed Embodiment

[0036] To make the above objects, features, and advantages of the present application more apparent and understandable, the following detailed description of the specific embodiments of the present application is provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application 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, and thus should not be construed as a limitation to the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0041] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0042] Embodiments of this application provide a battery electrode coating system. Please refer to Figures 1 to 6, the battery electrode coating system includes multiple coating oven modules 1, multiple heat exchange recovery modules 2, a heat pump module 3, and an exhaust gas treatment module 4. The multiple coating oven modules 1 are arranged in multiple rows. The coating oven module 1 is used to dry the battery electrode and discharge high-temperature exhaust gas. The multiple heat exchange recovery modules 2 are arranged in one-to-one correspondence with the multiple rows of coating oven modules 1. The heat exchange recovery module 2 is used to cool the high-temperature exhaust gas twice and heat the input gas flowing to the coating oven module 1 twice. The heat exchange recovery module 2 exchanges heat between the high-temperature exhaust gas and the input gas to achieve the first cooling of the high-temperature exhaust gas and the first heating of the input gas. After the high-temperature exhaust gas is cooled twice, it forms low-temperature exhaust gas. The heat pump module 3 is used to perform heat conversion between the second cooling and the second heating. The exhaust gas treatment module 4 is used to receive and treat the low-temperature exhaust gas discharged from the heat exchange recovery module 2.

[0043] In the embodiment of the present application, the battery electrode coating system includes multiple coating oven modules 1, multiple heat exchange recovery modules 2, a heat pump module 3, and an exhaust gas treatment module 4. The heat exchange recovery module 2 is used to cool the high-temperature exhaust gas twice and heat the input gas flowing to the coating oven module 1 twice. The heat exchange recovery module 2 exchanges heat between the high-temperature exhaust gas and the input gas to achieve the first cooling of the high-temperature exhaust gas and the first heating of the input gas. After the high-temperature exhaust gas is cooled twice, it forms low-temperature exhaust gas. Compared with the prior art of burning natural gas to generate steam for heating and equipped with a dedicated refrigeration unit to provide chilled water for cooling, the heat pump module 3 can perform heat conversion between the second cooling and the second heating, realize the energy conversion between low temperature and high temperature, improve the energy utilization rate, save energy, and reduce the system energy consumption.

[0044] At the same time, the multiple heat exchange recovery modules 2 are arranged in one-to-one correspondence with the multiple rows of coating oven modules 1, that is, each row of coating oven modules 1 is equipped with a heat exchange recovery module 2, which improves the heat exchange effect of the battery electrode coating system and further improves the energy utilization rate.

[0045] In one embodiment, please refer to Figures 2 to 4 , the coating oven module 1 includes an oven body 110, a first exhaust fan 120, and a circulation fan 130. The oven body 110 has a first exhaust port 111, a second exhaust port 112, and an air inlet 113. A first heater 230 is arranged between the circulation fan 130 and the air inlet 113. The air inlet 113 is simultaneously communicated with the second exhaust port 112 and the heat exchange recovery module 2, which improves the gas utilization rate. The first exhaust fan 120 is used to transport the high-temperature exhaust gas discharged from the first exhaust port 111 to the heat exchange recovery module 2. The circulation fan 130 is used to transport the gas discharged from the second exhaust port 112 and the input gas discharged from the heat exchange recovery module 2 to the air inlet 113.

[0046] Furthermore, each ventilation duct of the coating oven module 1 is also provided with a damper for controlling the air volume.

[0047] In one embodiment, please refer to Figure 5 , the heat exchange recovery module 2 includes an air-to-air heat exchanger 210, a condensation main unit 220, and a first heater 230. The air-to-air heat exchanger 210 has a first gas channel and a second gas channel. The high-temperature exhaust gas in the first gas channel exchanges heat with the input gas in the second gas channel to perform the first cooling of the high-temperature exhaust gas and the first heating of the input gas. The condensation main unit 220 is connected to the outlet of the first gas channel. The condensation main unit 220 is used to perform the second cooling of the high-temperature exhaust gas. A first circulation flow path is formed between the condensation main unit 220 and the heat pump module 3 so that the refrigerant of the heat pump module 3 can be transported to the condensation main unit 220. The first heater 230 is connected to the outlet of the second gas channel. The first heater 230 is used to perform the second heating of the input gas. A second circulation flow path is formed between the first heater 230 and the heat pump module 3 so that the heat medium of the heat pump module 3 can be transported to the first heater 230.

[0048] In this way, the heat exchange recovery module 2 heats the input gas twice to ensure that the temperature of the input gas meets the standard and improve the drying effect.

[0049] Specifically, please refer to Figure 5 , the condensation main unit 220 includes a freezing surface cooler 221 and a demister 222. The high-temperature exhaust gas is liquefied into NMP waste liquid in the freezing surface cooler 221. The heat exchange recovery module 2 further includes a waste liquid storage tank 280 connected to the freezing surface cooler 221. The waste liquid storage tank 280 is used to store the NMP waste liquid. The demister 222 is used to adsorb part of the NMP waste liquid mixed in the low-temperature exhaust gas to minimize the content of NMP waste liquid in the low-temperature exhaust gas discharged by the condensation main unit 220.

[0050] Furthermore, please refer to Figure 5 , the heat exchange recovery module 2 further includes a second exhaust fan 250, a return air fan 260, and a medium efficiency filter 270. The second exhaust fan 250 is arranged between the air-to-air heat exchanger 210 and the first exhaust port 111 to transport the high-temperature exhaust gas discharged from the first exhaust port 111 to the air-to-air heat exchanger 210. The return air fan 260 is arranged between the air-to-air heat exchanger 210 and the first heater 230 to transport the input gas discharged from the air-to-air heat exchanger 210 to the first heater 230. The medium efficiency filter 270 is arranged between the return air fan 260 and the first heater 230 to filter the input gas, improve the gas quality, and further improve the drying effect.

[0051] In one embodiment, the refrigerant in the first circulation flow path is chilled water.

[0052] In one embodiment, the heat medium in the second circulation flow path is heat-conducting oil or high-temperature hot water. High-temperature hot water has a low cost, while heat-conducting oil has the advantages of uniform heating and high temperature control accuracy.

[0053] In one embodiment, the outlet of the condensing host 220 is respectively connected to the inlet of the second gas channel and the tail gas treatment module 4. Part of the low-temperature waste gas is transported to the inlet of the second gas channel to form input gas, and the remaining low-temperature waste gas is transported to the tail gas treatment module 4.

[0054] Exemplarily, 90%-95% of the low-temperature waste gas is transported back to the gas-gas heat exchanger 210 for reuse, improving the gas utilization rate. 5%-10% of the low-temperature waste gas is transported to the tail gas treatment module 4 for purification treatment and then discharged to the high altitude.

[0055] In one embodiment, please refer to Figures 2 to 4 together. The first heater 230 is disposed in the coating oven module 1, specifically near the air inlet 113 of the oven body 111, so as to reduce the transportation distance of the heated transportation gas in the pipeline and reduce heat loss.

[0056] In one embodiment, please refer to Figures 1 to 4 together. In multiple coating oven modules 1 in each row, the temperatures of the multiple coating oven modules 1 increase from both ends to the middle.

[0057] Exemplarily, 12 coating oven modules 1 form a row. Taking the 6 coating oven modules 1 on one side as an example, the temperatures of the input gas at the air inlets 113 of each coating oven module 1 are 100°C, 110°C, 120°C, 130°C, 140°C, and 140°C in sequence from the end to the middle. It can be understood that in other embodiments, the specific temperatures of each coating oven module 1 are selected according to the actual drying requirements of the battery electrodes, and are not uniquely limited herein.

[0058] Exemplarily, multiple coating oven modules 1 are distributed in two rows, and the two rows of coating oven modules 1 are arranged vertically one above the other.

[0059] In one embodiment, please refer to Figure 3 and Figure 4 together. The heat exchange recovery module 2 further includes a second heater 240. The second heater 240 is disposed in the middle coating oven module 1, and the second heater 240 is used to perform a third heating on the input gas output by the first heater 230.

[0060] Specifically, only the first heater 230 is provided in two coating oven modules 1 at each end of the 12 coating oven modules 1. These coating oven modules 1 only need to be provided with the first heater 230 to meet the temperature requirements and avoid energy waste. The first heater 230 and the second heater 240 are simultaneously provided in the eight coating oven modules 1 in the middle to ensure that the temperature of the coating oven modules 1 in the middle can be higher than that of the coating oven modules 1 at the ends, ensuring a better drying effect.

[0061] In one embodiment, the second heater 240 uses high-temperature steam or high-temperature heat-conducting oil to perform the third heating on the input gas output by the first heater 230, or the second heater 240 uses electromagnetic heating to heat the heat medium in the first heater 230. Compared with the traditional electric heating or gas heating method, the heating speed is faster and the efficiency is higher when using high-temperature steam for heating; the heating method using high-temperature heat-conducting oil has the advantages of uniform heating and high temperature control accuracy.

[0062] In one embodiment, please refer to Figure 6 , the heat pump module 3 includes an evaporative condenser 310, a refrigerant preparation module 320, and a heat medium preparation module 330. The refrigerant preparation module 320 includes a circulating evaporator 321, a first compressor 322, and a first expansion valve 323. A first circulation flow path is formed between the circulating evaporator 321 and the condensation main unit 220. The circulating evaporator 321, the first compressor 322, the evaporative condenser 310, and the first expansion valve 323 are sequentially connected to form a third circulation flow path. The heat medium preparation module 330 includes a circulating condenser 331, a second expansion valve 332, and a second compressor 333. A second circulation flow path is formed between the circulating condenser 331 and the first heater 230. The circulating condenser 331, the second expansion valve 332, the evaporative condenser 310, and the second compressor 333 are sequentially connected to form a fourth circulation flow path. The third circulation flow path and the fourth circulation flow path exchange heat through the evaporative condenser 310.

[0063] In the first circulation flow path, the low-temperature and low-pressure refrigerant gas flowing out of the circulating evaporator 321 is compressed into a high-temperature and high-pressure refrigerant gas by the first compressor 322. The high-temperature and high-pressure refrigerant gas exchanges heat with the medium in the first circulation flow path through the evaporative condenser 310 to form a medium-temperature and high-pressure liquid refrigerant. The first expansion valve 323 then throttles the medium-temperature and high-pressure liquid refrigerant through it to become a low-temperature and low-pressure mist-like refrigerant. Then the mist-like refrigerant absorbs heat in the circulating evaporator 321 to achieve a refrigeration effect. The principle of the second circulation flow path is similar to that of the first circulation flow path, except that the heat medium in the circulating condenser 331 of the second circulation flow path is supplied to the heat exchange recovery module, which will not be elaborated here.

[0064] In other embodiments, an evaporation condenser 310, a refrigerant preparation module 320, and a heat medium preparation module 330 form a set of heat pump units. Multiple sets of heat pump units are provided in the heat pump module 3 to supply refrigerant and heat medium, ensuring the supply amounts of the refrigerant and the heat medium.

[0065] Exemplarily, if 24 coating oven modules 1 are provided in the present application, then 6 sets of heat pump units provided in the heat pump module 3 can meet the heat exchange requirements. It can be understood that in other embodiments, the number of heat pump units is designed according to the number of coating oven modules 1, and no unique limitation is made herein.

[0066] In other embodiments, the heat pump module 3 further includes a high-temperature buffer tank 340, a liquid replenishing device 350, and a low-temperature buffer tank 360. The high-temperature buffer tank 340 is used to collect the used heat medium discharged from each first heater 230, and functions as a transfer, storage, and heat preservation means; the liquid replenishing device 350 is connected to the high-temperature buffer tank 340, and the liquid replenishing device 350 is used to replenish the medium to the high-temperature buffer tank 340; the low-temperature buffer tank 360 is used to collect the used refrigerant from each condensing main unit 220, and also functions as a transfer, storage, and heat preservation means.

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0068] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A battery electrode coating system, characterized in that: include: A plurality of coating oven modules are arranged in multiple rows, and the coating oven modules are used to dry the battery electrodes and discharge high-temperature exhaust gas; A plurality of heat exchange recovery modules are arranged in one-to-one correspondence with the plurality of rows of coating oven modules, the heat exchange recovery modules are used to cool the high-temperature exhaust gas twice and heat the input gas flowing to the coating oven module twice, the heat exchange recovery modules exchange heat between the high-temperature exhaust gas and the input gas to achieve the first cooling of the high-temperature exhaust gas and the first heating of the input gas, and the high-temperature exhaust gas is cooled twice to form low-temperature exhaust gas; A heat pump module for heat conversion between the second cooling and the second heating; and The tail gas treatment module is used to receive and process the low-temperature exhaust gas discharged by the heat exchange recovery module.

2. The battery electrode coating system according to claim 1, characterized in that: The heat exchange recovery module comprises: an air-to-air heat exchanger having a first air channel and a second air channel, wherein the high-temperature exhaust gas in the first air channel exchanges heat with the input gas in the second air channel to first cool the high-temperature exhaust gas and first heat the input gas; A condensing main unit connected to the outlet of the first gas channel, the condensing main unit is used to perform a second cooling on the high-temperature exhaust gas, and a first circulation flow path is formed between the condensing main unit and the heat pump module so that the refrigerant of the heat pump module can be transported to the condensing main unit; and A first heater is connected to the outlet of the second gas channel. The first heater is used to heat the input gas for a second time. A second circulation flow path is formed between the first heater and the heat pump module so that the heat medium of the heat pump module can be transported to the first heater.

3. The battery electrode coating system according to claim 2, characterized in that: The refrigerant in the first circulation flow path is chilled water.

4. The battery electrode coating system according to claim 2, characterized in that: The heat medium in the second circulation flow path is heat transfer oil or high-temperature hot water.

5. The battery electrode coating system according to claim 2, characterized in that: The outlet of the condensing main unit is respectively connected to the inlet of the second gas channel and the exhaust gas treatment module, part of the low-temperature exhaust gas is transported to the inlet of the second gas channel to form the input gas, and the remaining low-temperature exhaust gas is transported to the exhaust gas treatment module.

6. The battery electrode coating system according to claim 2, characterized in that: The first heater is disposed in the coating oven module.

7. The battery electrode coating system according to claim 2, characterized in that: In each row of the plurality of coating oven modules, the temperatures of the plurality of coating oven modules increase gradually from both ends to the middle.

8. The battery electrode coating system according to claim 7, characterized in that: The heat exchange recovery module also includes a second heater, which is disposed in the middle of the coating oven module and is used for performing a third heating on the input gas output by the first heater.

9. The battery electrode coating system according to claim 8, characterized in that: The second heater uses high-temperature steam or high-temperature heat-conducting oil to perform a third heating on the input gas output by the first heater, or the second heater uses electromagnetic heating to heat the heat medium in the first heater.

10. The battery electrode coating system according to any one of claims 2 to 9, characterized in that: The heat pump module comprises: Evaporative condenser; A refrigerant preparation module, comprising a circulation evaporator, a first compressor and a first expansion valve, wherein the first circulation flow path is formed between the circulation evaporator and the condensing main unit, and the circulation evaporator, the first compressor, the evaporative condenser and the first expansion valve are sequentially connected to form a third circulation flow path; The heat medium preparation module includes a circulating condenser, a second expansion valve and a second compressor. The second circulating flow path is formed between the circulating condenser and the first heater. The circulating condenser, the second expansion valve, the evaporative condenser and the second compressor are connected in sequence to form a fourth circulating flow path. The third circulating flow path and the fourth circulating flow path exchange heat through the evaporative condenser.

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