Battery drying system

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a battery drying system which comprises an oven cavity, a steam supply system and a water circulation system, the interior of the oven cavity is used for placing battery cells and is provided with a plurality of heating pipelines used for being in contact with the battery cells, and the steam supply system is connected with the water circulation system. A heat exchange device is arranged between the water circulation system and the steam supply system, the steam supply system is used for conveying steam to the heat exchange device, the heat exchange device is used for collecting the steam and heating the water circulation system, and the water circulation system is used for water circulation flow between the heating pipeline and the heat exchange device. The system has the effects of reducing direct consumption of electric energy, reducing carbon emission and environmental pollution and meeting the requirements of energy conservation and emission reduction.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a battery drying system. Background Art

[0002] In the manufacturing process of lithium-ion batteries, the dehumidification and drying of battery cells are key steps to ensure battery performance and lifespan. Traditional drying methods mostly use electrothermal or hot air drying, which not only consumes high energy but also has limited drying efficiency and uniformity, posing challenges to the quality control of battery cells. Therefore, developing an efficient, energy-saving, and uniform dehumidification and drying technology is of great significance for improving the manufacturing level of the lithium battery industry. Summary of the Utility Model

[0003] Aiming at the deficiencies in the above-mentioned prior art, this application provides a battery drying system, aiming to gently and uniformly heat and dehumidify battery cells through steam combined with a circulating water system, which can effectively improve drying efficiency, reduce energy consumption, and enhance battery production quality.

[0004] The above-mentioned invention purpose of this application is achieved through the following technical solutions:

[0005] A battery drying system includes an oven cavity, a steam supply system, and a water circulation system. The inside of the oven cavity is used to place battery cells and is provided with several heating pipes for contacting the battery cells. A heat exchange device is arranged between the water circulation system and the steam supply system. The steam supply system is used to transport steam to the heat exchange device. The heat exchange device is used to collect steam and heat the water circulation system. The water circulation system is used for the water to circulate between the heating pipes and the heat exchange device.

[0006] By adopting the above technical solution, during drying, the steam supply system transports steam to the heat exchange device. The heat exchange device collects the steam, enabling the steam to directly act on the water circulating in the heat exchange device. Then, through the water circulation system, the water circulates to the heating pipes inside the oven cavity to increase the temperature of the heating pipes, thereby completing the contact heating and drying of the battery cells by the heating pipes. Compared with the electrothermal or hot air drying method, heating the water circulation system through steam and transferring the heat energy to the battery cells in the oven can reduce the direct consumption of electric energy, lower carbon emissions and environmental pollution, and meet the requirements of energy conservation and emission reduction.

[0007] In a preferred embodiment, the present application can be further configured as follows: the water circulation system is connected with a make-up water pipeline and a drainage pipeline. The make-up water pipeline is connected to an external water supply device, and the drainage pipeline is connected to a collection water tank. Water valves are provided in both the make-up water pipeline and the drainage pipeline. The collection water tank is connected with an exhaust pipe, and the exhaust pipe is connected to the water circulation system. An exhaust valve is provided on the exhaust pipe. The water circulation system is provided with a liquid level sensor, which is controllably connected to the exhaust valve. The liquid level sensor is used to monitor the water level height.

[0008] By adopting the above technical solution, the liquid level sensor can monitor the water level height in the water circulation system in real time. When the water level height is too high, the water in the water circulation system is transported to the collection water tank through the drainage pipeline in cooperation with the water valve of the drainage pipeline to reduce the water level height. When the water level height is too low, the water of the external water supply device is transported to the water circulation system through the make-up water pipeline in cooperation with the water valve of the make-up water pipeline. The structure is compact and the process is smooth. And when the water is replenished to the specified water level height, the liquid level sensor controls the opening and closing of the exhaust valve, so that the air in the water circulation system can be transported to the collection water tank through the exhaust pipe, achieving the dynamic pressure balance in the water circulation system. And by cooperating with the drainage pipeline connected to the collection water tank, when the water circulation system is overheated, the water source can be quickly mobilized from the external water supply device through the make-up water pipeline to cool the water circulation system, playing a role in overheat protection.

[0009] In a preferred embodiment, the present application can be further configured as follows: the water circulation system is provided with a pressure detector for monitoring water pressure, and the water circulation system is connected with a pressure relief pipeline. The pressure relief pipeline is connected to the collection water tank and is provided with a safety valve.

[0010] By adopting the above technical solution, the pressure detector can monitor the water pressure in the water circulation system in real time. When the water pressure is too high, the liquid in the water circulation system is released from the pressure relief pipeline to the collection water tank in cooperation with the safety valve, which can ensure the safety and stability of the water circulation system during operation, improve the resource utilization rate, and meet the requirements of energy conservation and emission reduction.

[0011] In a preferred embodiment, the present application can be further configured as follows: the steam supply system includes a steam supply pipeline. One end of the steam supply pipeline is connected to an external steam supply device and the other end is connected to the heat exchange device. A pneumatic proportional valve is provided on the steam supply pipeline.

[0012] By adopting the above technical solution, during drying, the steam supply pipeline can provide a carrier for steam input, and the pneumatic proportional valve can control the steam flow rate in the steam supply pipeline to adjust the heat output, thereby controlling the temperature of the water circulation system.

[0013] In a preferred embodiment, the present application can be further configured as follows: the steam supply system further includes a controller, the water circulation system is provided with a temperature sensor for monitoring the water temperature, and both the temperature sensor and the pneumatic proportional valve are controllably connected to the controller.

[0014] By adopting the above technical solution, the temperature sensor can monitor the water temperature in the water circulation system in real time. Cooperating with the controller controllably connected to the pneumatic proportional valve, it can ensure the stable and precise control of the water temperature.

[0015] In a preferred embodiment, the present application can be further configured as follows: a steam pipeline is communicatively provided between the heat exchange device and the collection water tank, and a steam trap is provided on the steam pipeline.

[0016] By adopting the above technical solution, the steam pipeline is provided, and in cooperation with the steam trap, the remaining steam after passing through the heat exchange device can be converted into condensed water and secondary steam and transmitted to the collection water tank, realizing the recovery and utilization of heat energy and improving the energy utilization efficiency.

[0017] In a preferred embodiment, the present application can be further configured as follows: the heat exchange device includes a heated sleeve and a plurality of heat exchange microtubes. The heat exchange microtubes are communicatively provided in the steam supply system, and a plurality of the heat exchange microtubes are arranged inside the heated sleeve, and the heated sleeve is communicatively provided in the water circulation system.

[0018] By adopting the above technical solution, while the heat exchange microtubes are communicatively connected to the steam supply system, they can provide a centralized collection position for the steam, so that the steam directly acts on a plurality of heat exchange microtubes, and then the heat transfer is completed by the heat exchange microtubes contacting the water in the heated sleeve, thereby quickly heating the water circulation system and realizing the process of transferring the heat in the steam to the water circulation system.

[0019] In a preferred embodiment, the present application can be further configured as follows: a plurality of the heat exchange microtubes are uniformly distributed in a spiral shape.

[0020] By adopting the above technical solution, a plurality of heat exchange microtubes arranged in a spiral shape can increase the contact area with the water in the heated sleeve, improve the heat transfer efficiency, ensure the heating uniformity, and improve the space utilization rate of the heated sleeve, making the arrangement of the heat exchange microtubes more compact in a limited space.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The steam supply system transports steam to the heat exchange device. The heat exchange device collects the steam, allowing the steam to directly act on the water circulating in the heat exchange device. Then, through the water circulation system, the water circulates and flows into the heating pipes inside the oven cavity to increase the temperature of the heating pipes, thereby completing the contact heating and drying of the battery cells by the heating pipes. Compared with the electric heating or hot air drying methods, by heating the water circulation system with steam and transferring the heat energy to the battery cells inside the oven, it can reduce the direct consumption of electric energy, lower carbon emissions and environmental pollution, and meet the requirements of energy conservation and emission reduction.

[0023] 2. The liquid level sensor can monitor the water level height in the water circulation system in real time. When the water level height is too high, it cooperates with the water valve of the drainage pipeline to transport the water in the water circulation system to the collection water tank through the drainage pipeline to reduce the water level height. When the water level height is too low, it cooperates with the water valve of the water supply pipeline to transport the water from the external water supply equipment to the water circulation system through the water supply pipeline. The structure is compact and the process is smooth. And when the water is replenished to the specified water level height, the liquid level sensor controls the opening and closing of the exhaust valve, so that the air in the water circulation system can be transported to the collection water tank through the exhaust pipe, achieving the dynamic pressure balance in the water circulation system. And by cooperating with the drainage pipeline connected to the collection water tank, when the water circulation system is overheated, it can quickly transfer water from the external water supply equipment through the water supply pipeline to cool down the water circulation system, playing a role in overheat protection.

[0024] 3. By setting up the steam pipeline and cooperating with the steam trap, the remaining steam after passing through the heat exchange device can be converted into condensed water and secondary steam and transported to the collection water tank, realizing the recovery and utilization of heat energy and improving the energy utilization efficiency. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of the battery drying system in an embodiment of the present application;

[0026] Figure 2 is the partial structural schematic diagram of the battery drying system in an embodiment of the present application.

[0027] Reference Numerals: 1. Oven Cavity; 2. Steam Supply System; 21. Steam Supply Pipeline; 22. Pneumatic Proportional Valve; 23. Controller; 24. Temperature Sensor; 3. Water Circulation System; 31. Circulating Water Pipeline; 32. Circulation Pump; 4. Heat Exchange Device; 41. Heated Sleeve; 42. Heat Exchange Microtube; 5. Collection Water Tank; 6. Exhaust Pipe; 7. Exhaust Valve; 8. Water Supply Pipeline; 9. Drainage Pipeline; 10. Water Valve; 11. Liquid Level Sensor; 12. Pressure Detector; 13. Pressure Relief Pipeline; 14. Safety Valve; 15. Steam Pipeline; 16. Steam Trap. Detailed Embodiments

[0028] The following describes exemplary embodiments of the present application with reference to the accompanying drawings. Various details of the embodiments of the present application are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, descriptions of well-known functions and structures are omitted in the following description for clarity and conciseness.

[0029] It should be noted that the terms "first", "second", etc. in the present utility model are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure.

[0030] In addition, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after, unless otherwise specified.

[0031] A battery drying system of the present application will be described below with reference to the accompanying drawings.

[0032] As Figure 1 and Figure 2 shown, the battery drying system includes an oven cavity 1, a steam supply system 2, and a water circulation system 3. The inside of the oven cavity 1 is used to place battery cells, and a number of heating pipes (not shown in the figure) for contacting the battery cells are uniformly arranged. A heat exchange device 4 is provided between the water circulation system 3 and the steam supply system 2. The steam supply system 2 is used to transport steam to the heat exchange device 4. The heat exchange device 4 is used to collect the steam and heat the water circulation system 3. The water circulation system 3 is used for the water to circulate between the heating pipes and the heat exchange device 4. During drying, the steam supply system 2 transports steam to the heat exchange device 4. The heat exchange device 4 collects the steam, so that the steam directly acts on the water circulating in the heat exchange device 4, and then through the water circulation system 3, the water circulates to the heating pipes inside the oven cavity 1 to increase the temperature of the heating pipes, thereby completing the contact heating and drying of the battery cells by the heating pipes. Compared with the electric heating or hot air drying method, by heating the water circulation system 3 with steam and transferring the heat energy to the battery cells in the oven, it can reduce the direct consumption of electric energy, reduce carbon emissions and environmental pollution, and meet the requirements of energy conservation and emission reduction.

[0033] It should be noted that the water circulation system 3 may include a circulating water pipeline 31. The shape of the circulating water pipeline 31 can be square, circular or other closable shapes, which is not limited here. A circulation pump 32 is provided at any position of the circulating water pipeline 31, and the circulation pump 32 is used to drive the water circulation inside the circulating water pipeline 31.

[0034] Among them, a water supply pipeline 8 and a drainage pipeline 9 are connected to the water circulation system 3. The water supply pipeline 8 is connected to an external water supply device, and the drainage pipeline 9 is connected to a collection water tank 5. Water valves 10 are provided on both the water supply pipeline 8 and the drainage pipeline 9. An exhaust pipe 6 is connected to the collection water tank 5, and the exhaust pipe 6 is connected to the water circulation system 3. An exhaust valve 7 is provided on the exhaust pipe 6. A liquid level sensor 11 is provided in the water circulation system 3, and the liquid level sensor 11 is controllably connected to the exhaust valve 7. The liquid level sensor 11 is used to monitor the water level height. The liquid level sensor 11 can monitor the water level height in the water circulation system 3 in real time. When the water level height is too high, it cooperates with the water valve 10 of the drainage pipeline 9 to transport the water in the water circulation system 3 to the collection water tank 5 through the drainage pipeline 9 to reduce the water level height. When the water level height is too low, it cooperates with the water valve 10 of the water supply pipeline 8 to transport the water of the external water supply device to the water circulation system 3 through the water supply pipeline 8. The structure is compact and the process is smooth. And when the water is replenished to the specified water level height, the liquid level sensor 11 controls the opening and closing of the exhaust valve 7 so that the air in the water circulation system 3 can be transported to the collection water tank 5 through the exhaust pipe 6 to achieve the dynamic pressure balance in the water circulation system 3. And through the cooperation with the drainage pipeline 9 connected to the collection water tank 5, when the water circulation system 3 is overheated, it can quickly transfer water from the external water supply device through the water supply pipeline 8 to cool the water circulation system 3, playing a role in overheat protection.

[0035] In addition, a pressure detector 12 for monitoring water pressure is provided in the water circulation system 3. A pressure relief pipeline 13 is connected to the water circulation system 3, and the pressure relief pipeline 13 is connected to the collection water tank 5 and is provided with a safety valve 14. The safety valve 14 is a device for controlling pressure to ensure that the equipment can release pressure when the pressure exceeds the set value, avoiding explosion or other dangerous situations of the equipment. The pressure detector 12 can monitor the water pressure in the water circulation system 3 in real time. When the water pressure is too high, it cooperates with the safety valve 14 to release the liquid in the water circulation system 3 from the pressure relief pipeline to the collection water tank 5, which can ensure the safety and stability of the water circulation system 3 during operation, improve the resource utilization rate, and meet the requirements of energy conservation and emission reduction.

[0036] In this embodiment, in order to achieve the regulation of the steam temperature, the steam supply system 2 includes a steam supply pipeline 21. One end of the steam supply pipeline 21 is connected to an external steam supply device, and the other end is connected to a heat exchange device 4. A pneumatic proportional valve 22 is provided on the steam supply pipeline 21. The pneumatic proportional valve 22 is a valve that controls the fluid flow using pneumatic force. By adjusting the opening of the valve through a pneumatic actuator, the fluid flow can be controlled. During drying, the steam supply pipeline 21 can provide an input carrier for steam, and the pneumatic proportional valve 22 can control the steam flow in the steam supply pipeline 21 to adjust the heat output, thereby controlling the temperature of the water circulation system 3.

[0037] It should be noted that in this embodiment, the above-mentioned external water supply device can be a municipal tap water pipeline, and the external steam supply device can be a municipal steam pipeline.

[0038] In addition, in one embodiment, the above-mentioned steam supply pipeline 21 and pneumatic proportional valve 22 cooperate with the water supply pipeline 8 and the drainage pipeline 9 to play a role in quickly regulating the drying temperature. When rapid heating is required, the pneumatic proportional valve 22 can control the steam flow in the steam supply pipeline 21 to quickly adjust the steam temperature, thereby quickly heating the water circulation system 3. When rapid cooling is required, water can be quickly transferred from the external water supply device through the water supply pipeline 8 to cool the water circulation system 3, playing a role in overheat protection and rapid cooling.

[0039] Furthermore, the steam supply system 2 further includes a controller 23. The water circulation system 3 is provided with a temperature sensor 24 for monitoring the water temperature. Both the temperature sensor 24 and the pneumatic proportional valve 22 are controlled and connected to the controller 23. The temperature sensor 24 can monitor the water temperature in the water circulation system 3 in real time. Cooperating with the controller 23 that is controlled and connected to the pneumatic proportional valve 22 can ensure the stable and precise control of the water temperature.

[0040] A steam pipeline 15 is connected between the heat exchange device 4 and the collection water tank 5. A steam trap 16 is provided on the steam pipeline 15. The steam trap 16 is a device used to remove condensate and gas generated in the pipeline system. By setting the steam pipeline 15 and cooperating with the steam trap 16, the remaining steam after passing through the heat exchange device 4 can be converted into condensed hot water and secondary steam and transmitted to the collection water tank 5, realizing the recovery and utilization of heat energy and improving the energy utilization efficiency.

[0041] It should be noted that the collection water tank 5 can be connected to other collection pipelines to facilitate the separate recovery and utilization of water resources and heat energy from the condensed hot water and secondary steam in the collection water tank 5.

[0042] In this embodiment, the heat exchange device 4 includes a heated sleeve 41 and a plurality of heat exchange microtubes 42. The heat exchange microtubes 42 are connected to the steam supply system 2. A plurality of heat exchange microtubes 42 are arranged inside the heated sleeve 41. The heated sleeve 41 is connected to the water circulation system 3. While the heat exchange microtubes 42 are connected to the steam supply system 2, they can provide a centralized collection position for the steam, enabling the steam to directly act on a plurality of heat exchange microtubes 42, and then complete heat transfer by contacting the moisture in the heated sleeve 41 through the heat exchange microtubes 42, thereby quickly heating the water circulation system 3 and realizing the process of transferring the heat in the steam to the water circulation system 3.

[0043] Further, a plurality of heat exchange microtubes 42 are evenly distributed in a spiral shape. The plurality of heat exchange microtubes 42 arranged in a spiral shape can increase the contact area with the moisture in the heated sleeve 41, improve the efficiency of heat transfer, ensure the uniformity of heating, and improve the space utilization rate of the heated sleeve 41, making the arrangement of the heat exchange microtubes 42 more compact in a limited space.

[0044] The implementation principle of a battery drying system according to an embodiment of the present application is as follows: When drying, the pneumatic proportional valve 22 is opened, and the steam flow in the steam supply pipe 21 is adjusted according to requirements. The steam is transported to a plurality of heat exchange microtubes 42, and then heat transfer is completed by contacting the moisture in the heated sleeve 41 through the heat exchange microtubes 42. After the water in the heated sleeve 41 is heated, under the action of the circulation pump 32, it flows to the heating pipe inside the oven cavity 1 to increase the temperature of the heating pipe, thereby completing the contact heating and drying of the battery core by the heating pipe. Compared with the electric heating or hot air drying method, by heating the water circulation system 3 with steam and transferring the heat energy to the battery core in the oven, it can reduce the direct consumption of electric energy, reduce carbon emissions and environmental pollution, meet the requirements of energy conservation and emission reduction, and when rapid temperature increase is required, the pneumatic proportional valve 22 can control the steam flow in the steam supply pipe 21 to quickly adjust the steam temperature, thereby quickly heating the water circulation system 3. When rapid cooling is required, water can be quickly transferred from an external water supply device through the water replenishing pipeline 8 to cool the water circulation system 3, playing a role in overheat protection and rapid cooling.

[0045] The above specific implementation manners do not constitute a limitation to the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub - combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery drying system, characterized in that: include: An oven cavity (1), a steam supply system (2) and a water circulation system (3), wherein the oven cavity (1) is used to place battery cells and is provided with a plurality of heating pipes for contacting the battery cells, a heat exchange device (4) is provided between the water circulation system (3) and the steam supply system (2), the steam supply system (2) is used to transport steam to the heat exchange device (4), the heat exchange device (4) is used to collect steam and heat the water circulation system (3), and the water circulation system (3) is used for water circulation between the heating pipes and the heat exchange device (4).

2. A battery drying system according to claim 1, characterized in that: The water circulation system (3) is connected to a water supply pipeline (8) and a drainage pipeline (9), the water supply pipeline (8) is connected to an external water supply device, the drainage pipeline (9) is connected to a water collection tank (5), the water supply pipeline (8) and the drainage pipeline (9) are both provided with a water valve (10), the collection tank (5) is connected to an exhaust pipe (6), the exhaust pipe (6) is connected to the water circulation system (3), the exhaust pipe (6) is provided with an exhaust valve (7), the water circulation system (3) is provided with a liquid level sensor (11), the liquid level sensor (11) is controllably connected to the exhaust valve (7), and the liquid level sensor (11) is used to monitor the water level.

3. A battery drying system as claimed in claim 2, characterized in that: The water circulation system (3) is provided with a pressure detector (12) for monitoring water pressure. The water circulation system (3) is connected to a pressure relief pipeline (13). The pressure relief pipeline (13) is connected to the water collection tank (5) and is provided with a safety valve (14).

4. A battery drying system as claimed in claim 1, characterized in that: The steam supply system (2) comprises a steam supply pipeline (21), one end of the steam supply pipeline (21) is connected to an external steam supply device and the other end is connected to the heat exchange device (4), and the steam supply pipeline (21) is provided with a pneumatic proportional valve (22).

5. A battery drying system as claimed in claim 4, characterized in that: The steam supply system (2) further comprises a controller (23), the water circulation system (3) is provided with a temperature sensor (24) for monitoring water temperature, and the temperature sensor (24) and the pneumatic proportional valve (22) are both controllably connected to the controller (23).

6. A battery drying system as claimed in claim 2, characterized in that: A steam pipeline (15) is provided between the heat exchange device (4) and the collecting water tank (5), and the steam pipeline (15) is provided with a steam trap (16).

7. A battery drying system as claimed in claim 1, characterized in that: The heat exchange device (4) comprises a heat-receiving sleeve (41) and a plurality of heat-exchanging micro-tubes (42); the heat-exchanging micro-tubes (42) are arranged in communication with the steam supply system (2); the plurality of heat-exchanging micro-tubes (42) are arranged inside the heat-receiving sleeve (41); and the heat-receiving sleeve (41) is arranged in communication with the water circulation system (3).

8. A battery drying system as claimed in claim 7, characterized in that: The plurality of heat exchange microtubes (42) are evenly distributed in a spiral shape.

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