Nitrogen electrode drying device

Abstract

The utility model relates to a nitrogen electrode drying device which comprises a machine frame, a circulating drying mechanism fixed in the machine frame, a walking supporting mechanism fixed at the bottom of the machine frame and a sealing box fixed at the upper end of the machine frame. By means of the well-designed circulating drying mechanism, nitrogen can be directly heated, the heated nitrogen is directly introduced into the sealing box, moisture on an electrode is rapidly taken away, and the electrode drying efficiency is greatly improved; according to the novel nitrogen electrode drying device, the nitrogen storage box is arranged, so that nitrogen circulation areas are all in positive pressure, external air is prevented from entering, the electrodes are prevented from being oxidized in the drying process, the quality of the electrodes is improved, the novel nitrogen electrode drying device can achieve efficient, uniform and stable drying of the electrodes, and the drying efficiency is improved. And it is ensured that the electrode reaches the required quality standard.

Description

Technical Field

[0001] This utility model relates to the field of battery production, and in particular to a nitrogen electrode drying device. Background Technology

[0002] With the continuous development of the battery manufacturing industry, solvents are typically used in electrode preparation to help homogenize active materials, conductive agents, and binders. If these solvents remain in the electrode, they can negatively impact battery performance. The drying process effectively evaporates the solvents, allowing the electrode materials to form a stable structure. If solvents remain, they may react chemically with the electrode materials during subsequent charging and discharging, leading to performance degradation, such as capacity decay. Binders play a crucial role in bonding active materials and conductive agents together in the electrode. During drying, as the solvent evaporates, the binder forms a tighter bond between the active material and conductive agent particles. However, existing drying devices still have some shortcomings in electrode production. For example, patent CN209386698U discloses a solar cell drying device, which has the following drawbacks: the heating mechanism is located on both sides, and the heating mechanism and inert gas are independent. Since oxygen is still present in the initial environment, it cannot be removed, potentially leading to oxidation of the product during the drying process. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a nitrogen electrode drying device that solves the problems existing in the prior art. Through a carefully designed circulating drying mechanism, nitrogen can be directly heated and then directly introduced into a sealed box to quickly remove moisture from the electrodes, greatly improving the efficiency of electrode drying. Furthermore, by setting up a nitrogen storage box, the area where nitrogen circulates is under positive pressure, preventing external air from entering and expelling the initial ambient air, thus preventing the electrodes from being oxidized during the drying process and improving the quality of the electrodes.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen electrode drying device, comprising a frame, a circulating drying mechanism fixed inside the frame, a walking support mechanism fixed at the bottom of the frame, and a sealed box fixed at the top of the frame;

[0007] The circulating drying mechanism includes a motor bracket, a circulating motor fixed to the upper end of the motor bracket, a first main pipe fixed to the upper end of the circulating motor, a second main pipe fixed to the lower end of the sealed box, a third main pipe fixed to the side of the second main pipe, a dehumidification mechanism fixed to the third main pipe, a fourth main pipe fixed to the other end of the dehumidification mechanism, a heating branch pipe fixed to the lower end of the fourth main pipe, a heater fixed to the lower end of the heating branch pipe, a solenoid valve fixed to the lower end of the second main pipe, a nitrogen branch pipe fixed to the lower end of the solenoid valve, and a gas storage tank fixed to the lower end of the nitrogen branch pipe.

[0008] Preferably, a baffle is provided inside the heating branch pipe.

[0009] Preferably, the sealed box includes a sealing bracket, a sealing plate fixed around the sealing bracket, a sealed door fixed at the front end of the sealing bracket, a control panel fixed at the top of the sealed door, an indicator light fixed at the top of the sealing bracket, and a circulation mechanism fixed at the top of the bottom sealing plate.

[0010] Preferably, the circulation mechanism includes a side outlet shell, a connecting shell fixed in the middle of the side outlet shell, a first air guide plate fixed at the upper end of the connecting shell, and a second air guide plate fixed at the upper end of the first air guide plate.

[0011] Preferably, an air inlet is provided at the bottom of the connecting shell.

[0012] (III) Beneficial Effects

[0013] The purpose of this invention is to provide a nitrogen electrode drying device. This device uses circulating heated nitrogen for drying, making the entire drying process more efficient. This novel nitrogen electrode drying device can achieve efficient, uniform, and stable drying of the electrodes, ensuring that the electrodes reach the desired moisture content. At the same time, the design of this device improves the controllability of the entire drying process and reduces labor costs, making it an innovative technology with broad application prospects. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0015] Figure 2 This is a schematic diagram of the circulating drying mechanism in this utility model.

[0016] Figure 3 This is a schematic diagram of the heating branch pipe in this utility model.

[0017] Figure 4 This is a schematic diagram of the sealing box in this utility model.

[0018] Figure 5 This is a schematic diagram of the circulation mechanism in this utility model.

[0019] Figure 6This is a schematic diagram of the connecting shell in this utility model.

[0020] In the diagram: 1-Frame, 2-Circulating drying mechanism, 201-Motor bracket, 202-Circulating motor, 203-First main pipe, 204-Second main pipe, 205-Third main pipe, 206-Dehumidification mechanism, 207-Fourth main pipe, 208-Heating branch pipe, 2081-Baffle plate, 209-Heater, 210-Solenoid valve, 211-Nitrogen branch pipe, 212-Gas storage tank, 3-Walking support mechanism, 4-Sealed box, 401-Sealed bracket, 402-Sealing plate, 403-Sealed door, 404-Control panel, 405-Indicator light, 406-Circulation mechanism, 4061-Side outlet shell, 4062-Connecting shell, 4063-First air guide plate, 4064-Second air guide plate, 4065-Air inlet. Detailed Implementation

[0021] The following will refer to the appendix in the example of this utility model. Figure 1 -Appendix Figure 6 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] This utility model provides a technical solution: a nitrogen electrode drying device, including a frame 1, a circulating drying mechanism 2 fixed in the frame 1, a walking support mechanism 3 fixed at the bottom of the frame 1, and a sealed box 4 fixed at the top of the frame 1; the frame 1 serves as the supporting structure for the entire nitrogen electrode drying device, providing a fixed installation position for the circulating drying mechanism 2, the walking support mechanism 3, and the sealed box 4, so that the various components can be stably combined together, ensuring the overall stability and reliability of the device, and ensuring that the drying effect is not affected by the shaking of the components during operation, providing a stable working platform for the drying work. The circulating drying mechanism 2 is the core part of the nitrogen electrode drying device, which is mainly responsible for the circulation, heating, and dehumidification of nitrogen, providing continuous, dry, and high-temperature nitrogen for the electrode drying in the sealed box 4. These operations can quickly remove moisture from the electrodes, achieving efficient drying of the electrodes, while preventing external air from entering the system and avoiding electrode oxidation. The walking support mechanism 3 is installed at the bottom of the frame 1 to support the entire device and enable the device to move, facilitating its movement in workshops and other locations. This allows the device to be flexibly adjusted in position according to actual production needs, facilitating electrode drying operations.

[0023] The circulating drying mechanism 2 includes a motor bracket 201, a circulating motor 202 fixed to the upper end of the motor bracket 201, a first main pipe 203 fixed to the upper end of the circulating motor 202, a second main pipe 204 fixed to the lower end of the sealed box 4, a third main pipe 205 fixed to the side of the second main pipe 204, a dehumidification mechanism 206 fixed to the third main pipe 205, a fourth main pipe 207 fixed to the other end of the dehumidification mechanism 206, a heating branch pipe 208 fixed to the lower end of the fourth main pipe 207, and a heating branch pipe 208 fixed to the lower end of the heating branch pipe 208. The system includes a heater 209 at one end, a solenoid valve 210 fixed at the lower end of the second main pipe 204, a nitrogen branch pipe 211 fixed at the lower end of the solenoid valve 210, and a gas storage tank 212 fixed at the lower end of the nitrogen branch pipe 211. A motor bracket 201 is used to fix the circulating motor 202, providing stable support and ensuring its position remains fixed during operation, reducing vibration and ensuring stable operation of the entire circulation system. The circulating motor 202 provides power for the circulation of nitrogen in the circulating drying mechanism 2. It drives nitrogen to circulate through a series of pipes, including the first main pipe 203, forming a closed loop within the device. The first main pipe 203, as one of the main pipelines for circulating nitrogen, guides the nitrogen driven by the circulating motor to the subsequent pipeline system. This ensures the transfer of nitrogen from the outlet of the circulating motor 202 to the inlet of the sealed box 4, guaranteeing that the nitrogen flows along a predetermined path. The second main pipe 204 is connected to the bottom of the sealed box 4, venting the nitrogen containing moisture from the sealed box 4. The third main pipe 205 guides the nitrogen from the second main pipe to the dehumidification mechanism 206, allowing the nitrogen to remove moisture during circulation, ensuring the dryness of the nitrogen during circulation, removing water vapor that may mix into the nitrogen during the drying process, improving the drying performance of the nitrogen, and facilitating better drying of the electrodes. The dehumidification mechanism 206 dehumidifies the circulating nitrogen, removing moisture and reducing the humidity of the nitrogen, ensuring that the circulating nitrogen remains dry and preventing moisture from being brought back into the sealed box 4, thereby improving the quality and efficiency of drying. The fourth main pipe 207 delivers the nitrogen dehumidified by the dehumidification mechanism 206 to the heating branch pipe 208, allowing the nitrogen to enter the heating stage, and then delivers the heated nitrogen back to the circulating motor 202 for the next dehumidification cycle. The heating branch pipe 208 is the channel for nitrogen to flow into and out of the heater 209, which heats the nitrogen to provide the heat required for drying the electrodes. This allows nitrogen gas to quickly remove moisture from the electrodes after entering the sealed chamber 4, greatly improving the electrode drying efficiency. Solenoid valve 210 controls the flow of nitrogen gas from the storage tank 212 into the sealed chamber 4, maintaining a constant negative pressure within the chamber. This precisely controls the pressure within the sealed chamber 4 and compensates for any lost nitrogen. Nitrogen branch pipe 211 transports nitrogen gas from the storage tank 212 to the main pipeline system of the circulating drying mechanism 2. Serving as a nitrogen delivery channel, it introduces nitrogen from the storage location into the circulation system, ensuring a continuous nitrogen supply.The gas storage tank 212 is used to store nitrogen, providing a nitrogen source for the entire drying unit. It also ensures that the area where nitrogen flows is under positive pressure, preventing external air from entering and thus preventing the electrodes from being oxidized during the drying process.

[0024] A baffle 2081 is installed inside the heating branch pipe 208; the baffle 2081 divides the heating branch pipe 208 into two parts, one half serving as an outflow channel and the other half as an inflow channel, placing the inflowing and outflowing nitrogen in adjacent channels compared to independent inflow and outflow pipes. This arrangement allows the inflowing cold nitrogen to fully absorb the heat dissipated by the outflowing hot nitrogen. The hot nitrogen, which is at a higher temperature in the outflow channel, will transfer its heat to the cold nitrogen in the adjacent inflow channel through the baffle. Compared to independent inflow and outflow pipes, this compact heat exchange structure can utilize heat more effectively and reduce heat loss to the surrounding environment, thereby improving the heat exchange efficiency of the entire heating process.

[0025] The sealed box 4 includes a sealing bracket 401, a sealing plate 402 fixed around the sealing bracket 401, a sealed door 403 fixed at the front end of the sealing bracket 401, a control panel 404 fixed at the top of the sealed door 403, an indicator light 405 fixed at the top of the sealing bracket 401, and a circulation mechanism 406 fixed at the top of the bottom sealing plate 402. The sealing bracket 401 serves as the skeleton structure of the sealed box 4, providing fixed support for components such as the sealing plate 402 and the sealed door 403, ensuring the overall shape and structural strength of the sealed box 4. It ensures that the sealed box 4 will not deform during use, maintains the airtightness of the sealed box 4, and provides a closed space for electrode drying. The sealing plate 402 surrounds the sealing bracket 401, forming a closed outer shell of the sealed box together with the sealing bracket 401, preventing external air from entering and internal nitrogen from leaking. The sealed door 403 is installed at the front end of the sealing bracket 401 and is used to open and close the sealed box 4, facilitating the insertion and removal of electrodes. The control panel 404 is installed on the upper end of the sealed door 403 and is used to control the operating parameters of the entire drying device, such as drying time and temperature. Users can conveniently set drying process parameters through the control panel 404 to achieve precise control of the drying process and improve drying quality. The indicator light 405 is installed on the upper end of the sealed bracket 401 and is used to indicate the working status of the device, such as whether drying is in progress or has been completed. The circulation mechanism 406 ensures that the nitrogen gas after heating and dehydration can fully contact the electrodes before flowing out of the sealed chamber 4.

[0026] The circulation mechanism 406 includes a side-exit housing 4061, a connecting housing 4062 fixed in the middle of the side-exit housing 4061, a first guide plate 4063 fixed to the upper end of the connecting housing 4062, and a second guide plate 4064 fixed to the upper end of the first guide plate 4063. The side-exit housing 4061 has an opening at its upper end for conveying heated nitrogen gas into the sealed box 4. The connecting housing 4062 is used to convey nitrogen gas from the first main pipe 203 into the side-exit housing 4061. The first guide plate 4063 and the second guide plate 4064 form a nitrogen gas outflow channel. This arrangement has the following advantages:

[0027] Efficiency and Orderliness of Nitrogen Delivery

[0028] The upper opening of the side-exit gas shell 4061 is used to transport heated nitrogen gas. This opening design allows the heated nitrogen gas to directly enter the sealed chamber 4, providing heat and a drying environment for electrode drying. Because the opening is located at the upper end of the side-exit gas shell 4061, the hot nitrogen gas enters the sealed chamber 4 and naturally sinks under gravity. The slow sinking speed of hot air allows the electrodes to fully absorb heat, which is beneficial for the distribution of nitrogen gas within the sealed chamber 4, enabling better contact between the hot nitrogen gas and the electrodes and improving drying efficiency. Compared to other complex air intake methods, this method of directly introducing air from the upper opening of the side-exit gas shell 4061 is simple and efficient, quickly introducing hot nitrogen gas into the sealed chamber 4, reducing heat loss and flow resistance during nitrogen transport, and ensuring that the nitrogen gas reaches the electrodes at a high temperature and appropriate flow rate.

[0029] The bottom of the connecting shell 4062 is provided with an air inlet 4065; the air inlet is connected to the first main pipe 203.

[0030] Working principle:

[0031] First, the electrodes are stacked in the sealed box 4, and then the equipment is started. Since oxygen is still present in the initial environment, the circulation motor 202 starts and the solenoid valve 210 opens to deliver nitrogen into the circulation pipeline. Since the equipment cannot be completely sealed, the nitrogen is mixed with the air in the initial environment and circulates together. As air leaks, new nitrogen continuously enters the circulation from the gas storage tank 212, and the circulation is always under positive pressure, so the oxygen concentration will gradually decrease. When the oxygen concentration reaches the threshold, the heater 209 starts to heat the nitrogen in the circulation. The heated nitrogen enters the circulation motor 202 through the fourth main pipe 207, and is pumped into the sealed box 4 through the first main pipe 203. After flowing through the electrodes, the nitrogen in the sealed box 4 passes through the second main pipe 204 and the third main pipe 205, is dehydrated by the dehumidification mechanism 206, and then re-enters the heater 209 to complete one cycle.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nitrogen electrode drying device, characterized in that, It includes a frame (1), a circulating drying mechanism (2) fixed inside the frame (1), a walking support mechanism (3) fixed at the bottom of the frame (1), and a sealed box (4) fixed at the top of the frame (1); The circulating drying mechanism (2) includes a motor bracket (201), a circulating motor (202) fixed to the upper end of the motor bracket (201), a first main pipe (203) fixed to the upper end of the circulating motor (202), a second main pipe (204) fixed to the lower end of the sealed box (4), a third main pipe (205) fixed to the side of the second main pipe (204), a dehumidification mechanism (206) fixed to the third main pipe (205), a fourth main pipe (207) fixed to the other end of the dehumidification mechanism (206), a heating branch pipe (208) fixed to the lower end of the fourth main pipe (207), a heater (209) fixed to the lower end of the heating branch pipe (208), a solenoid valve (210) fixed to the lower end of the second main pipe (204), a nitrogen branch pipe (211) fixed to the lower end of the solenoid valve (210), and a gas storage tank (212) fixed to the lower end of the nitrogen branch pipe (211).

2. The nitrogen electrode drying apparatus according to claim 1, characterized in that, A baffle (2081) is provided inside the heating branch pipe (208).

3. The nitrogen electrode drying apparatus according to claim 1, characterized in that, The sealed box (4) includes a sealing bracket (401), a sealing plate (402) fixed around the sealing bracket (401), a sealed door (403) fixed at the front end of the sealing bracket (401), a control panel (404) fixed at the upper end of the sealed door (403), an indicator light (405) fixed at the upper end of the sealing bracket (401), and a circulation mechanism (406) fixed at the upper end of the bottom sealing plate (402).

4. The nitrogen electrode drying apparatus according to claim 3, characterized in that, The circulation mechanism (406) includes a side outlet shell (4061), a connecting shell (4062) fixed in the middle of the side outlet shell (4061), a first air guide plate (4063) fixed at the upper end of the connecting shell (4062), and a second air guide plate (4064) fixed at the upper end of the first air guide plate (4063).

5. A nitrogen electrode drying apparatus according to claim 4, characterized in that, An air inlet (4065) is provided at the bottom of the connecting shell (4062).

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