Battery electrode coating system

Abstract

The utility model relates to a battery electrode coating system and belongs to the technical field of waste gas recycling, the battery electrode coating system comprises a coating and recycling integrated drying oven, a heat pump module and a tail gas treatment module, the coating and recycling integrated drying oven comprises a coating drying oven module and a heat exchange recycling module, and the heat exchange recycling module is fixed to the top of the coating drying oven module; the coating oven module is used for drying a battery electrode and discharging high-temperature waste gas, the heat exchange recovery module is used for cooling the high-temperature waste gas twice and heating input gas flowing to the coating oven module twice, and the heat pump module is used for performing heat conversion between secondary cooling and secondary heating. The tail gas treatment module is used for receiving and treating low-temperature waste gas exhausted by the heat exchange recovery module. According to the battery electrode coating system provided by the invention, the heat exchange recovery module and the coating oven module are designed into integrated equipment, so that pipeline laying between the coating oven module and the heat exchange recovery module is reduced, and the space utilization rate and the attractiveness are improved.

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 and drying 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 plant for processing. After processing, high-purity NMP products are obtained. At the same time, the treated NMP waste gas is discharged into the air at high altitude after meeting the environmental protection requirements. In the existing NMP waste gas recovery process, a heat exchange system is usually connected outside the coating oven to recover waste heat and treat tail gas, resulting in pipes covering the entire production site, reducing the space utilization rate and aesthetics of the production site. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a battery electrode coating system to solve the technical problems of low space utilization rate and poor aesthetics in the production site of battery electrodes in the prior art.

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

[0005] A coating and recovery integrated oven, including a coating oven module and a heat exchange and recovery module. The heat exchange and recovery module is fixed on the top of the coating oven module. The coating oven module is used to dry the battery electrode and discharge high-temperature waste gas. The heat exchange and recovery module is used to cool the high-temperature waste 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 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.

[0006] 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.

[0007] Optionally, the heat exchange and recovery module includes:

[0008] 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.

[0009] The condensing main unit is connected to the outlet of the first gas channel. The condensing main unit 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

[0010] The first heater is connected to the outlet of the second gas channel. The first heater 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.

[0011] Optionally, the refrigerant in the first circulation flow path is chilled water.

[0012] Optionally, the heat medium in the second circulation flow path is heat-conducting oil or high-temperature hot water.

[0013] Optionally, in multiple coating oven modules in each row, the temperatures of the multiple coating oven modules increase from both ends to the middle.

[0014] Optionally, the heat exchange recovery module further includes a second heater. The second heater is arranged in the coating oven module in the middle. The second heater is used for heating the input gas output by the first heater for the third time, or the second heater is used for heating the heat medium in the first heater.

[0015] 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.

[0016] Optionally, there are multiple coating and recovery integrated ovens, and the multiple coating and recovery integrated ovens are arranged in multiple rows and columns.

[0017] Optionally, the multiple coating and recovery integrated ovens are arranged in 2 rows and 12 columns.

[0018] Optionally, the heat pump module includes:

[0019] An evaporative condenser;

[0020] 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 connected to form a third circulation flow path;

[0021] 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 connected 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.

[0022] 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 a coating and recovery integrated oven, a heat pump module, and an exhaust gas treatment module. The coating and recovery integrated oven includes a coating oven module and a heat exchange and recovery module. The coating oven module is used to dry the battery electrode and discharge high-temperature exhaust gas, and 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 is fixed on the top of the coating oven module to form an integrated device, reducing the pipeline laying between the coating oven module and the heat exchange and recovery module, and improving the space utilization rate and aesthetics; at the same time, the pipeline between the coating oven module and the heat exchange and recovery module is short, and a fan can be installed only in the coating oven module without installing a fan in the heat exchange and recovery module, further improving the space utilization rate and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the battery electrode coating system provided by the embodiment of this application;

[0025] Figure 2 It is a schematic structural diagram of the coating and recovery integrated oven with only the first heater of the battery electrode coating system provided by the embodiment of this application;

[0026] Figure 3 It is a schematic structural diagram of the coating and recovery integrated oven with the first heater and the second heater of the battery electrode coating system provided by the embodiment of this application Figure 1 ;

[0027] Figure 4 It is a schematic structural diagram of the coating and recovery integrated oven with the first heater and the second heater of the battery electrode coating system provided by the embodiment of this application Figure 2 ;

[0028] Figure 5 It is a schematic structural diagram of the heat pump module of the battery electrode coating system provided by the embodiment of this application.

[0029] Description of the reference numerals:

[0030] 1. Coating and Recycling Integrated Oven; 110. Coating Oven Module; 111. Oven Body; 1111. First Exhaust Port; 1112. Second Exhaust Port; 1113. Intake Port; 112. Exhaust Fan; 113. Circulation Fan; 120. Heat Exchange and Recycling Module; 121. Air-to-Air Heat Exchanger; 122. Condensation Main Unit; 1221. Refrigerating Coil; 1222. Demister; 123. First Heater; 124. Second Heater; 125. Medium Efficiency Filter; 126. Waste Liquid Temporary Storage Tank; 127. High Temperature Steam System;

[0031] 2. Heat Pump Module; 210. Evaporative Condenser; 220. Refrigerant Preparation Module; 221. Circulating Evaporator; 222. First Compressor; 223. First Expansion Valve; 230. Heat Medium Preparation Module; 231. Circulating Condenser; 232. Second Expansion Valve; 233. Second Compressor; 240. High Temperature Buffer Tank; 250. Liquid Supplying Device; 260. Low Temperature Buffer Tank; 270. Auxiliary Refrigeration Unit;

[0032] 3. Tail Gas Treatment Module. Detailed Embodiment

[0033] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed embodiment of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0034] 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 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 therefore cannot be understood as a limitation to the present application.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "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 internal communication of two components or the interaction relationship between two components, 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.

[0037] In this application, unless otherwise clearly defined or limited, 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 indirectly in 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 is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" 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 is at a lower horizontal height than the second feature.

[0038] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can 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 can 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.

[0039] Embodiments of the present application provide a battery electrode coating system. Please refer to Figures 1 to 5 , the battery electrode coating system includes a coating and recovery integrated oven 1, a heat pump module 2 and an exhaust gas treatment module 3. The coating and recovery integrated oven 1 includes a coating oven module 110 and a heat exchange and recovery module 120. The heat exchange and recovery module 120 is fixed on the top of the coating oven module 110. The coating oven module 110 is used to dry the battery electrode and discharge high-temperature exhaust gas. The heat exchange and recovery module 120 is used to cool the high-temperature exhaust gas twice and heat the input gas flowing to the coating oven module 110 twice. The heat exchange and recovery module 120 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 2 is used to perform heat conversion between the second cooling and the second heating. The exhaust gas treatment module 3 is used to receive and treat the low-temperature exhaust gas discharged from the heat exchange and recovery module 120.

[0040] In the embodiment of the present application, the battery electrode coating system includes a coating and recovery integrated oven 1, a heat pump module 2, and an exhaust gas treatment module 3. The coating and recovery integrated oven 1 includes a coating oven module 110 and a heat exchange and recovery module 120. The coating oven module 110 is used to dry the battery electrode and discharge high-temperature exhaust gas. The heat exchange and recovery module 120 is used to cool the high-temperature exhaust gas twice and heat the input gas flowing to the coating oven module 110 twice. The heat exchange and recovery module 120 is fixed on the top of the coating oven module 110 to form an integrated device, reducing the pipeline laying between the coating oven module 110 and the heat exchange and recovery module 120, and improving the space utilization rate and aesthetics. At the same time, the pipeline between the coating oven module 110 and the heat exchange and recovery module 120 is short, and a fan can be installed only in the coating oven module 110, without setting a fan in the heat exchange and recovery module 120, further improving the space utilization rate and reducing the cost.

[0041] Meanwhile, compared with the prior art in which natural gas is burned to generate steam for heating and a dedicated refrigeration unit is equipped to provide chilled water for cooling, the heat pump module 2 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.

[0042] In one embodiment, please refer to Figure 2 and Figure 3 , the coating oven module 110 includes an oven body 111, an exhaust fan 112, and a circulation fan 113. The oven body 111 has a first exhaust port 1111, a second exhaust port 1112, and an air inlet 1113. A first heater 123 is disposed between the circulation fan 113 and the air inlet 1113. The air inlet 1113 is simultaneously communicated with the second exhaust port 1112 and the heat exchange and recovery module 120, improving the gas utilization rate. The exhaust fan 112 is used to convey the high-temperature exhaust gas discharged from the first exhaust port 1111 to the heat exchange and recovery module 120. The circulation fan 113 is used to convey the gas discharged from the second exhaust port 1112 and the input gas discharged from the heat exchange and recovery module 120 to the air inlet 1113.

[0043] Furthermore, each ventilation pipeline of the coating oven module 110 is also provided with a valve for controlling the air volume.

[0044] In one embodiment, please refer to Figures 2 to 4, the heat exchange and recovery module 120 includes an air-air heat exchanger 121, a condensation main unit 122, and a first heater 123. The air-air heat exchanger 121 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 on the high-temperature exhaust gas and the first heating on the input gas. The condensation main unit 122 is connected to the outlet of the first gas channel. The condensation main unit 122 is used to perform the second cooling on the high-temperature exhaust gas. A first circulation flow path is formed between the condensation main unit 122 and the heat pump module 2 so that the refrigerant of the heat pump module 2 can be transported to the condensation main unit 122. The first heater 123 is connected to the outlet of the second gas channel. The first heater 123 is used to perform the second heating on the input gas. A second circulation flow path is formed between the first heater 123 and the heat pump module 2 so that the heat medium of the heat pump module 2 can be transported to the first heater 123.

[0045] In this way, the heat exchange and recovery module 120 heats the input gas twice to ensure that the temperature of the input gas meets the standard and improve the drying effect.

[0046] Specifically, please refer to Figures 2 to 4 together. The condensation main unit 122 includes a freezing surface cooler 1221 and a demister 1222. The high-temperature exhaust gas is liquefied into NMP waste liquid in the freezing surface cooler 1221. The heat exchange and recovery module 120 further includes a waste liquid storage tank 126 connected to the freezing surface cooler 1221. The waste liquid storage tank 126 is used to store the waste liquid. The demister 1222 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 from the condensation main unit 122.

[0047] Further, the condensation main units 122 of each coating and recovery integrated oven 1 are connected to a waste liquid storage tank 126.

[0048] Further, please refer to Figures 2 to 4 together. The heat exchange and recovery module 120 further includes a medium-efficiency filter 125. The medium-efficiency filter 125 is arranged between the air-air heat exchanger 121 and the first heater 123 to filter the input gas, improve the gas quality, and further improve the drying effect.

[0049] In one embodiment, the refrigerant in the first circulation flow path is chilled water.

[0050] 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.

[0051] In one embodiment, the outlet of the condensing main unit 122 is respectively connected to the inlet of the second gas channel and the tail gas treatment module 3. A 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 3.

[0052] Exemplarily, 90%-95% of the low-temperature waste gas is transported back to the gas-gas heat exchanger 121 for reuse, improving the gas utilization rate. 5%-10% of the low-temperature waste gas is transported to the tail gas treatment module 3 for purification treatment and then discharged to the high altitude.

[0053] In one embodiment, please refer to Figure 2 and Figure 3 , the first heater 123 is arranged in the coating oven module 110, specifically near the air inlet 1113 of the oven body 111, so as to reduce the transportation distance of the heated transportation gas in the pipeline and reduce heat loss.

[0054] In one embodiment, among the multiple coating oven modules 110 in each row, the temperatures of the multiple coating oven modules 110 increase from both ends to the middle.

[0055] Exemplarily, 12 coating oven modules 110 form a row. Taking the 6 coating oven modules 110 on one side as an example, the temperatures of the input gas at the air inlets 1113 of each coating oven module 110 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 110 are selected according to the actual drying requirements of the battery electrode, and are not uniquely limited herein.

[0056] Exemplarily, multiple coating oven modules 110 are distributed in two rows, and the two rows of coating oven modules 110 are arranged vertically up and down.

[0057] In one embodiment, please refer to Figures 1 to 4 , the heat exchange recovery module 120 further includes a second heater 124. The second heater 124 is arranged in the middle coating oven module 110. The second heater 124 is used to perform a third heating on the input gas output by the first heater 123, or the second heater 124 is used to heat the heat medium in the first heater 123.

[0058] Specifically, two coating oven modules 110 at each end of the twelve coating oven modules 110 are only provided with the first heater 123. These coating oven modules 110 only need to be provided with the first heater 123 to meet the temperature requirements and avoid energy waste. The eight coating oven modules 110 in the middle are simultaneously provided with the first heater 123 and the second heater 124 to ensure that the temperature of the coating oven modules 110 in the middle can be higher than that of the coating oven modules 110 at the ends, ensuring a better drying effect.

[0059] In one embodiment, please refer to Figure 3 , the second heater 124 uses high-temperature steam or high-temperature heat-conducting oil to perform a third heating on the input gas output by the first heater 123. 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 heating; when using the heating method of high-temperature heat-conducting oil, it has the advantages of uniform heating and high temperature control accuracy.

[0060] Correspondingly, if the second heater 124 uses the heating method of high-temperature steam, the heat exchange recovery module 120 further includes a high-temperature steam system 127, and the high-temperature steam system 127 is used to provide high-temperature steam for all the second heaters 124.

[0061] Or, please refer to Figure 4 , the second heater 124 uses electromagnetic heating to heat the heat medium in the first heater 123. Using electromagnetic heating does not require laying a large number of pipelines, and electromagnetic heating has many advantages such as high thermal efficiency, fast heating speed, energy conservation and environmental protection, high temperature control accuracy, safety and reliability, and simple maintenance.

[0062] In summary, since the heat medium in the second circulation flow path is heat-conducting oil or high-temperature hot water, and the second heater 124 uses high-temperature steam heating or electromagnetic heating; then the heat medium in the second circulation flow path of the present application is heat-conducting oil, and the second heater 124 uses high-temperature steam heating; or, the heat medium in the second circulation flow path of the present application is heat-conducting oil, and the second heater 124 uses electromagnetic heating; or, the heat medium in the second circulation flow path of the present application is high-temperature hot water, and the second heater 124 uses high-temperature steam heating; or, the heat medium in the second circulation flow path of the present application is high-temperature hot water, and the second heater 124 uses electromagnetic heating. It can be understood that the heat medium in the second circulation flow path and the heating method of the second heater 124 can be flexibly selected according to the actual drying requirements, and are not uniquely limited herein.

[0063] In one embodiment, please refer to Figure 1 , a plurality of coating and recovery integrated ovens 1 are provided, and the plurality of coating and recovery integrated ovens 1 are arranged in multiple rows and multiple columns.

[0064] In one embodiment, the plurality of coating and recovery integrated ovens 1 are arranged in 2 rows and 12 columns.

[0065] It is understandable that the number and arrangement of the coating and recycling integrated oven 1 are flexibly designed according to the actual site conditions, and no unique limitation is made here.

[0066] In one embodiment, please refer to Figure 5 , the heat pump module 2 includes an evaporative condenser 210, a refrigerant preparation module 220 and a heat medium preparation module 230. The refrigerant preparation module 220 includes a circulating evaporator 221, a first compressor 222 and a first expansion valve 223. A first circulation flow path is formed between the circulating evaporator 221 and the condensation main unit 122. The circulating evaporator 221, the first compressor 222, the evaporative condenser 210 and the first expansion valve 223 are sequentially connected to form a third circulation flow path; the heat medium preparation module 230 includes a circulating condenser 231, a second expansion valve 232 and a second compressor 233. A second circulation flow path is formed between the circulating condenser 231 and the first heater 123. The circulating condenser 231, the second expansion valve 232, the evaporative condenser 210 and the second compressor 233 are sequentially connected 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 210.

[0067] With the above settings, the refrigerant preparation module 220 and the heat medium preparation module 230 share one evaporative condenser 210, eliminating the need to equip the coating and recycling integrated oven 1 with a separate refrigerant preparation device and a separate heat medium preparation device, improving the integration and aesthetics of the battery electrode coating system, minimizing the laying of pipelines as much as possible, improving the space utilization rate and reducing costs.

[0068] In the first circulation flow path, the first compressor 222 compresses the low-temperature and low-pressure refrigerant gas flowing out of the circulating evaporator 221 into a high-temperature and high-pressure refrigerant gas. The high-temperature and high-pressure refrigerant gas exchanges heat with the medium in the first circulation flow path through the evaporative condenser 210 to form a medium-temperature and high-pressure liquid refrigerant. The first expansion valve 223 then throttles the medium-temperature and high-pressure liquid refrigerant through it to become a low-temperature and low-pressure fog-like refrigerant. Then the fog-like refrigerant absorbs heat in the circulating evaporator 221 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 231 of the second circulation flow path is supplied to the heat exchange and recovery module 120, which will not be elaborated here.

[0069] In other embodiments, one evaporative condenser 210, one refrigerant preparation module 220 and one heat medium preparation module 230 form a set of heat pump units. Multiple sets of heat pump units are arranged in the heat pump module 2 to supply refrigerant and heat medium to ensure the supply amounts of refrigerant and heat medium.

[0070] Exemplarily, if 24 coating oven modules 110 are provided in the present application, then 6 heat pump units are provided in the heat pump module 2 of the present application to 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 110, and no unique limitation is made here.

[0071] In other embodiments, the heat pump module 2 further includes a high-temperature buffer tank 240. The high-temperature buffer tank 240 is arranged between the inlet of the heat medium preparation module 230 and the heat exchange recovery module 120. The high-temperature buffer tank 240 is used to buffer and keep warm the heat medium in the second circulation path, playing the roles of transfer, storage, and heat preservation.

[0072] In other embodiments, the heat pump module 2 further includes a liquid supplement device 250 connected to the high-temperature buffer tank 240. The liquid supplement device 250 is used to timely supplement the heat medium into the high-temperature buffer tank 240 to ensure the stable operation of the system.

[0073] In other embodiments, the heat pump module 2 further includes a low-temperature buffer tank 260. The low-temperature buffer tank 260 is arranged between the inlet of the refrigerant preparation module 220 and the heat exchange recovery module 120. The low-temperature buffer tank 260 is used to buffer and keep warm the refrigerant in the first circulation path, also playing the roles of transfer, storage, and heat preservation.

[0074] In other embodiments, the heat pump module 2 further includes an auxiliary refrigeration unit 270. The auxiliary refrigeration unit 270 is arranged between the outlet of the refrigerant preparation module 220 and the heat exchange recovery module 120. Since the heat exchange recovery module 120 is fixed on the top of the coating oven module 110, the pipeline between the refrigerant preparation module 220 and the condensing main unit 122 may be too long, and the refrigerant in the pipeline may be affected by the environment, resulting in an increase in the temperature of the refrigerant in the pipeline. The auxiliary refrigeration unit 270 can assist in cooling the refrigerant in the pipeline after detecting that the temperature of the refrigerant passing through its position rises to a preset value to ensure that the temperature of the refrigerant meets the standard.

[0075] In other embodiments, pump bodies are provided in both the first circulation path and the second circulation path to facilitate the smooth operation of both the first circulation path and the second circulation path.

[0076] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief 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 to be within the scope described in this specification.

[0077] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to 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 modifications and improvements can still be made, and these all fall within 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 coating and recovery integrated oven, comprising a coating oven module and a heat exchange recovery module, wherein the heat exchange recovery module is fixed to the top of the coating oven module, the coating oven module is used to dry the battery electrodes and discharge high-temperature exhaust gas, the heat exchange 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 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, 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 gas channel and a second gas channel, wherein the high-temperature exhaust gas in the first gas channel exchanges heat with the input gas in the second gas channel to perform a first cooling of the high-temperature exhaust gas and a first heating of the input gas; A condensing main unit connected to the outlet of the first gas channel, the condensing main unit is used to cool the high-temperature exhaust gas for a second time, 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: 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.

6. The battery electrode coating system according to claim 5, characterized in that: The heat exchange recovery module also includes a second heater, which is arranged in the middle of the coating oven module. The second heater is used to heat the input gas output by the first heater for a third time, or the second heater is used to heat the heat medium in the first heater.

7. The battery electrode coating system according to claim 6, 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.

8. The battery electrode coating system according to any one of claims 1 to 7, characterized in that: The coating and recovery integrated ovens are provided in plurality, and the plurality of coating and recovery integrated ovens are arranged in multiple rows and columns.

9. The battery electrode coating system according to claim 8, characterized in that: The plurality of coating and recovery integrated ovens are arranged in 2 rows and 12 columns.

10. The battery electrode coating system according to any one of claims 2 to 7, 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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