Electrolyte supply control system
The automated electrolyte supply control system solves the problem of metal foreign matter contamination in lithium battery production, achieves safe and reliable electrolyte delivery, reduces the risk of spontaneous combustion, and improves battery quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAKASAGO CONSTRUCTORS ENGINEERS (BEIJING) CO LTD
- Filing Date
- 2023-01-12
- Publication Date
- 2026-06-09
AI Technical Summary
In current lithium battery production, the electrolyte supply process is prone to the introduction of metallic foreign objects, which can lead to short circuits and fire risks. Furthermore, it relies on manual operation, posing safety hazards.
An automated electrolyte supply control system is adopted, including storage and production warehouses. Components such as pneumatic diaphragm valves, electrical explosion-proof magnetic pumps, breather valves, and nitrogen pipelines are used to ensure the aseptic delivery and circulation of electrolyte and reduce human intervention.
It effectively prevents the ingress of metallic foreign objects, reduces the spontaneous combustion rate of new energy vehicles, ensures electrolyte temperature and quality, reduces manual labor, and improves battery life and production efficiency.
Smart Images
Figure CN116031591B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of electrolyte supply technology for lithium battery production, specifically, it relates to an electrolyte supply control system. Background Technology
[0002] With the rise of new energy vehicles, battery fires have become increasingly frequent. Many of these fires are caused by collisions in traffic accidents, and the primary cause of these collision-induced fires is often a short circuit in the lithium battery's electrolyte due to external pressure. The applicant discovered that the presence of metallic foreign objects in the lithium battery electrolyte can easily cause short circuits, especially under external pressure, leading to fires. Currently, lithium battery production still relies on manual electrolyte injection. Each time, a flexible tube is inserted into the electrolyte supply tank to draw electrolyte. This tube is previously exposed to air before being manually inserted into the tank, which can introduce metallic foreign objects into the electrolyte due to the initial contact with air.
[0003] Therefore, in order to prevent metallic foreign matter from being mixed into the electrolyte, it is necessary to develop a system that can automatically supply electrolyte. Summary of the Invention
[0004] This application can replace the original manual liquid injection process, transforming it into a centralized liquid supply system, ensuring that there are no metal foreign objects inside the battery. The technical solution adopted in this application is as follows:
[0005] An electrolyte supply control system includes a storage warehouse and a production warehouse. The storage warehouse contains electrolyte storage tanks T-1, T-2, ..., T-N, where N is greater than or equal to 2. The top of each electrolyte storage tank is connected to a first delivery pipeline via a branch line equipped with a pneumatic diaphragm valve. The first delivery pipeline is used to connect to an electrolyte tanker truck. Furthermore, a parallel electrically explosion-proof magnetic pump delivery pipeline is connected to the bottom of T-1, and the output end of this parallel electrically explosion-proof magnetic pump delivery pipeline is connected to the first delivery pipeline.
[0006] The top of T~1 is connected to its bottom via a pipeline equipped with an electrical explosion-proof magnetic pump. Furthermore, the top of T~n-1 is connected to the top and bottom of T~n via a pipeline, and an electrical explosion-proof magnetic pump is installed on the pipeline connecting the top and bottom. n is less than or equal to N and greater than 1.
[0007] The bottom of lines T~2 to T~N are connected to a second infusion line via pipelines. Multiple third infusion lines branch off from the second infusion line, supplying electrolyte to electrolyte buffer tanks in various production warehouses. Each production warehouse is equipped with electrolyte buffer tanks S~1, S~2, ..., S~M, where M is greater than or equal to 2. A third infusion line connects to the top of electrolyte buffer tank S~1. Furthermore, a first return line branches off from the third infusion line connecting to electrolyte buffer tank S~1, and this first return line connects to the third infusion line.
[0008] The bottom of S~1 is also connected to the top of S~2, ..., S~M via parallel electrical explosion-proof magnetic pump delivery pipelines. The bottom of tanks S~2, ..., S~M is connected to the production electrolyte supply pipelines, which are connected to the electrolyte chamber. The electrolyte chamber supplies electrolyte to various production process nodes through multiple pipelines.
[0009] Optionally, a pipeline is also connected from the top of T~1 to T~N to a breather valve, and the breather valve is connected to the VOC system via a flame arrester.
[0010] S~1 to S~M are also connected to another breather valve via pipelines, and the other breather valve is connected to the VOC system via another flame arrester.
[0011] Optionally, a nitrogen pipeline is also provided, which is connected to the top of the electrolyte storage tank and the electrolyte buffer tank, and the nitrogen pipeline is also connected to the electrolyte tanker.
[0012] Optionally, parallel filter pipelines are installed on the nitrogen pipelines corresponding to T~1 to T~N. Each filter pipeline is equipped with a filter. Pressure reducing valves are connected to the upstream and downstream of the parallel filter pipelines. After passing through the two pressure reducing valves, the nitrogen gas flows to the top of T~1 to T~N. In addition, a branch line is also branched between the parallel filter pipeline and the downstream pressure reducing valve, which is connected to the breather valve and the flame arrester.
[0013] The nitrogen pipelines corresponding to tanks S~1 to S~M pass through a pressure reducing valve, a parallel filter pipeline, and another pressure reducing valve in sequence before connecting to tanks S~1 to S~M, as well as between the breather valve and the flame arrester.
[0014] Optionally, a gas delivery pipeline and a liquid delivery pipeline are connected in parallel on the first infusion pipeline. A flow switch is installed on the liquid delivery pipeline, and the flow switch is electrically connected to a valve on the nitrogen pipeline. When the flow switch detects that the pipeline is full of electrolyte, the gas delivery pipeline is closed, and the liquid delivery pipeline is opened, allowing the electrolyte to be delivered through the liquid delivery pipeline. When the flow switch detects that the electrolyte contains gas, it controls the increase of the nitrogen flow rate into the tanker, closes the liquid delivery pipeline, and opens the gas delivery pipeline, using nitrogen pressure to deliver the electrolyte from the gas delivery pipeline.
[0015] Furthermore, at least one of the following is equipped with a parallel electrically explosion-proof magnetic pump delivery pipeline: downstream of the flow switch on the liquid delivery pipeline, on the third delivery pipeline, and on the electrolyte supply pipeline. Each electrically explosion-proof magnetic pump delivery pipeline is equipped with an electrically explosion-proof magnetic pump and an electric valve. One of the electrically explosion-proof magnetic pump delivery pipelines serves as a backup pipeline. By measuring the real-time pressure change of the electrically explosion-proof magnetic pump delivery pipeline, the opening of the electric valve in the electrically explosion-proof magnetic pump delivery pipeline is adjusted according to the pressure change to ensure constant pressure in the electrically explosion-proof magnetic pump delivery pipeline. An emergency shut-off valve is also installed downstream of the parallel electrically explosion-proof magnetic pump delivery pipeline.
[0016] Optionally, the electrolyte chamber can also return electrolyte to the top of tanks S~2,……, to S~M via a third return pipeline.
[0017] Optionally, each electrolyte storage tank is equipped with a level gauge. For any electrolyte storage tank, when the first high level is reached, the corresponding pneumatic diaphragm valve closes. When the second high level is reached, the pump supplying electrolyte to the tank stops running and generates an alarm signal. The second high level is higher than the first high level. When the tank reaches the first low level, the pump supplying electrolyte to the tank starts to replenish the electrolyte. When the tank reaches the second low level, the pump supplying electrolyte from the tank stops running and generates an alarm signal. The second low level is lower than the first low level.
[0018] Furthermore, S~1 to S~M are also equipped with high and low liquid level protection.
[0019] Optionally, jackets are provided on the outside of S~1 to S~M. The jackets are connected to the circulating cooling water and the temperature of the circulating cooling water is controlled by the electrolyte temperature data emitted by the temperature sensor connected to the tank.
[0020] Optionally, the effective volume of tank T-1 is equal to the effective volume of the electrolyte tanker truck, and tank T-1 remains empty after the electrolyte tanker truck has finished transporting the electrolyte.
[0021] Optionally, the top of S~2 to S~M is connected to the spare tank via a second reflux line.
[0022] Optionally, all tanks and equipment in the storage and production warehouses are placed in a drip tray, which is also equipped with a leak detection sensor. If an electrolyte leak is detected, the pump on the pipeline where the leak is located is stopped, the corresponding emergency shut-off valve is closed, and the emergency fan is turned on.
[0023] Optionally, the indoor electrolyte piping is made of 316L sanitary stainless steel, while the outdoor electrolyte piping is made of PFA pipe with a PVC sleeve.
[0024] The electrolyte supply control system of this application has the following beneficial effects:
[0025] (1) It can effectively control the mixing of metal foreign objects into the car battery and reduce the spontaneous combustion accident rate of new energy vehicles.
[0026] (2) It can ensure the temperature and flow characteristics of the electrolyte, ensure the quality of the electrolyte, and thus ensure the life of the lithium battery.
[0027] (3) The number on each battery can correspond to the number of the tanker truck. When a battery has a problem, the electrolyte in the corresponding tanker truck can be traced back, so that each batch of batteries can be traced and queried.
[0028] (4) It can minimize the labor of manually handling electrolyte, save labor costs, and reduce the risk of electrolyte handling. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of storage warehouse A in the electrolyte supply control system of this invention.
[0030] Figure 2 This is a schematic diagram of production warehouse B in the electrolyte supply control system of this embodiment of the invention. Detailed Implementation
[0031] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications are all within the protection scope of the claims of the present invention.
[0032] In the following text, the electrolyte pipelines indoors (i.e., inside storage warehouse A and production warehouse B) are made of SUS316L sanitary stainless steel, while the electrolyte pipelines located outdoors (i.e., in trenches in the outdoor environment outside the storage and production warehouses) and the pipelines on the user side are all made of PFA (tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer) pipes with PVC (polyvinyl chloride) sleeves.
[0033] In the following text, in gas and liquid pipelines, the direction of gas and liquid inflow is upstream, and the direction of gas and liquid outflow is downstream.
[0034] The electrolyte supply control system in this embodiment includes a storage warehouse A and a production warehouse B. Figure 1 For storage warehouse A, Figure 2 For production warehouse B, Figure 1 Pipeline on the right side of the middle Figure 2The corresponding pipelines on the left side are connected. Taking storage warehouse A with three electrolyte storage tanks (T~1, T~2, and T~3) as an example, and production warehouse B with two buffer tanks (S~2 and S~2) as an example, the electrolyte storage tanks are used to store electrolyte transported from electrolyte tank trucks. For example... Figure 1 As shown, the electrolyte tanker is connected to one end of the first infusion pipeline 10, and the other end of the first infusion pipeline 10 is connected to the tops of three electrolyte storage tanks, T-1, T-2, and T-3, respectively, to transport the electrolyte there. Furthermore, pneumatic diaphragm valves 300 are installed on the branch pipelines leading to T-1, T-2, and T-3. In particular, the first infusion pipeline 10 is also connected to the bottom of T-1, where a parallel electrically explosion-proof magnetic pump infusion pipeline 105 is connected. Each of these pipelines is equipped with an electrically explosion-proof magnetic pump 1051, and the output end of the parallel electrically explosion-proof magnetic pump infusion pipeline 105 is connected to the first infusion pipeline to pump the electrolyte from T-1 into T-2 and T-3.
[0035] A gas delivery line 102 and a liquid delivery line 103 are connected in parallel to the first infusion line 10. A flow switch 104 is installed on the liquid delivery line 103 so that when there is gas in the first infusion line 10, the liquid delivery line 103 is closed, and the gas delivers the electrolyte from the gas delivery line 102. Downstream of the flow switch 104, there is a parallel electrically explosion-proof magnetic pump delivery line 105, and an electrically explosion-proof magnetic pump 1051 is installed on each of the electrically explosion-proof magnetic pump delivery lines. One of the electrically explosion-proof magnetic pump delivery lines can be used as a backup line. A filter 106 and a flow meter 107 are also connected in sequence between the first infusion line 10 and the electrolyte storage tanks T~1, T~2, and T~3.
[0036] The top of T-1 is connected to its bottom via a pipe equipped with an explosion-proof magnetic pump 1051 to control the circulation of the electrolyte and prevent it from remaining stagnant for extended periods, thus achieving circulation. Furthermore, the top of T-1 is connected to the top and bottom of T-2 via another pipe, and the top of T-2 is connected to the top and bottom of T-3 via a pipe. An explosion-proof magnetic pump 1051 is installed on the pipe connecting the top and bottom of T-2 to circulate the electrolyte of T-2 between T-1 and T-2. Similarly, an explosion-proof magnetic pump 1051 is installed on the pipe connecting the top and bottom of T-3 to circulate the electrolyte of T-3 between T-2 and T-3.
[0037] The bottoms of tanks T-2 and T-3 are connected to a second infusion line 20, which is used to supply electrolyte to the electrolyte buffer tank in production warehouse B. Each electrolyte storage tank (T-1, T-2, and T-3) is equipped with a level gauge to obtain the current liquid level in real time. The high and low level control logic is the same for T-1 through T-3: when the first high liquid level is reached, the pump supplying liquid to that tank does not stop running, but the corresponding pneumatic diaphragm valve 300 closes. When the second high liquid level is reached, the pump supplying liquid to that tank stops running and an alarm signal is generated. The first high liquid level is higher than the second high liquid level. When the liquid level in the tank reaches the first low liquid level, the corresponding pneumatic diaphragm valve 300 opens to replenish the liquid. When the liquid level in the tank reaches the second low liquid level, the pump supplying electrolyte from that tank stops running and an alarm signal is generated. Taking T-3 as an example, if T-3 reaches the first high liquid level, the electrically explosion-proof magnetic pump 1051 supplying liquid to it will not stop, but the pneumatic diaphragm valve 300 will close. When it reaches the second high liquid level, the pump will stop running and an alarm signal will be generated. If T-3 reaches the first low liquid level, its pneumatic diaphragm valve 300 will open. When it reaches the second low liquid level, the electrically explosion-proof magnetic pump 1051 on the second liquid delivery line 20 will stop running and an alarm signal will be generated.
[0038] Preferably, the effective volume of tank T-1 is equal to the maximum volume of the electrolyte tanker truck. Tank T-1 is not used to store electrolyte. Instead, after the electrolyte tanker truck has finished transporting the electrolyte, all the electrolyte in T-1 is transported to T-2 and T-3 through the parallel electrical explosion-proof magnetic pump delivery pipeline 105, while T-1 remains empty. The empty tank state means reaching a low liquid level to ensure that the electrolyte tanker truck can transport electrolyte at any time it arrives at the site.
[0039] The second infusion line 20 branches off into multiple lines to deliver electrolyte to the electrolyte buffer tanks of different production warehouses B. Each production warehouse B has the same structure. Here, we will only take one production warehouse B as an example. The second infusion line 20 branches off into a third infusion line 30 to deliver electrolyte to the production warehouse B.
[0040] The third infusion line 30 is equipped with a parallel electrically explosion-proof magnetic pump infusion line 105. Each electrically explosion-proof magnetic pump infusion line is equipped with an electrically explosion-proof magnetic pump 1051 and a filter 106. One of the electrically explosion-proof magnetic pump infusion lines can be used as a backup line. An emergency shut-off valve 301 is also installed downstream of the parallel electrically explosion-proof magnetic pump infusion line.
[0041] The third infusion line 30 enters the production warehouse B after passing through the outdoor electrolyte delivery line, and then connects to the top of the buffer tank S-1 via the pneumatic diaphragm valve 300. Furthermore, a first return line 40 branches off from the line connecting the third infusion line 30 to the buffer tank S-1. Specifically, the first return line 40 branches upstream of the pneumatic diaphragm valve 300 and connects upstream of the parallel electrically explosion-proof magnetic pump infusion line 105 of the third infusion line 30. The top of S-2 is connected to a spare tank via a second return line 50. The spare tank allows for manual extraction of electrolyte when the system is unusable due to a system failure. Because the electrolyte needs to avoid stagnation for more than 4 hours, during long-term shutdowns, unused electrolyte can be returned to the upstream of the parallel electrically explosion-proof magnetic pump infusion line 105 in the storage warehouse A via the first return line 40, ensuring that the electrolyte remains flowing even when production is not in operation.
[0042] The bottom of S-1 is also connected to the top of S-1 and S-2 via a parallel electrically explosion-proof magnetic pump infusion line 105. S-1 and S-2 are also equipped with high and low liquid level protection. For example, if S-2 reaches a low liquid level, the electrically explosion-proof magnetic pump in the parallel electrically explosion-proof magnetic pump infusion line at the bottom of S-1 starts, replenishing electrolyte; if S-2 reaches a high liquid level, the electrically explosion-proof magnetic pump shuts off. Similarly, if S-1 reaches a low liquid level, the pneumatic diaphragm valve 300 on the third infusion line 30 opens; if S-1 reaches a high liquid level, the pneumatic diaphragm valve 300 on the third infusion line closes.
[0043] Both S-1 and S-2 are equipped with jackets on their exteriors, which are connected to the circulating cooling water. The temperature of the circulating cooling water, preferably 20°C, is controlled by the electrolyte temperature data emitted by the temperature sensor 302 connected to the tank. Furthermore, the temperature sensor 302 can be electrically connected to the valve of the cooling water inlet pipe. When the temperature of the electrolyte in the tank exceeds the temperature threshold, the valve of the cooling water inlet pipe is opened.
[0044] The bottom of tanks S-2 is connected to the production electrolyte supply pipeline 60. This pipeline also has parallel electrically explosion-proof magnetic pump delivery pipelines 105, each equipped with an electrically explosion-proof magnetic pump 1051. One of these pipelines can serve as a backup. An emergency shut-off valve 301 is located downstream of the electrically explosion-proof magnetic pump delivery pipeline. The production electrolyte supply pipeline is connected to the electrolyte chamber 70, which supplies electrolyte to various production process nodes through multiple pipelines. For example... Figure 2 The system includes multiple parallel supply pipelines, 36#, 37#, 40#, and 41#, each connected to a filter, solenoid valve, and flow meter.
[0045] Among them, for each parallel electric explosion-proof magnetic pump infusion pipeline 105, an electric valve is installed in any of the electric explosion-proof magnetic pump infusion pipelines. By measuring the real-time pressure change of the electric explosion-proof magnetic pump infusion pipeline, the opening of the electric valve in the pipeline is adjusted according to the pressure change to ensure that the pressure in the electric explosion-proof magnetic pump infusion pipeline is constant.
[0046] The system also includes a breathing system, which is connected to breathing valve 111 via pipelines from T~1 to T~3. Breathing valve 111 is connected to the VOC system via flame arrester 112. Similarly, another breathing valve is connected to S~1 and S~2 via pipelines, and the other breathing valve is connected to the VOC system via a corresponding flame arrester.
[0047] All tanks and equipment in storage warehouse A and production warehouse B are placed in the drip tray 100. The drip tray 100 is also equipped with a leak detection sensor. After detecting a leak, the leak detection sensor will send a signal to the controller. The controller will stop the pump on the pipeline corresponding to the leak point, specifically the pump on the parallel infusion pipeline, and close the emergency shut-off valve 301 on the main pipeline of the parallel infusion pipeline. At the same time, the emergency fan will be turned on to exhaust air.
[0048] The system also includes a nitrogen pipeline connected to the top of electrolyte storage tanks T1 to T3, supplying nitrogen gas to tightly seal the electrolyte within the nitrogen atmosphere. The nitrogen pipeline also connects to an electrolyte tank truck, where nitrogen is used to displace the electrolyte, ensuring complete delivery. A safety valve is installed on the nitrogen pipeline leading to the electrolyte tank truck. Furthermore, parallel filter pipelines are installed on the nitrogen pipeline, each equipped with a filter 106. The pressure difference before and after each filter 106 is measured to detect filter blockage, and the filter element is replaced as needed. A pressure reducing valve 120 is connected upstream of the parallel filter pipelines to reduce the nitrogen pressure to 0.2 MPa. A further pressure reducing valve 120 is installed on the nitrogen pipeline leading to the top of T1 to T3, further reducing the nitrogen pressure to 0.005 MPa before supplying it to T1 to T3. In addition, a branch of the nitrogen pipeline with a pressure of 0.2 MPa nitrogen is connected between the breather valve 111 and the flame arrester 112 to further reduce the risk of deflagration.
[0049] Similarly, nitrogen pipelines are also connected to tanks S-1 and S-2. After passing through pressure reducing valve 120, parallel filter pipeline and pressure reducing valve 120 in sequence, the nitrogen pressure is reduced to 0.005MPa and delivered to S-1 and S-2, as well as between breather valve 111 and flame arrester 112.
[0050] In the liquid delivery pipeline 103 of the aforementioned first infusion pipeline 10, the flow switch controls the flow rate of nitrogen gas into the electrolyte tanker by detecting the electrolyte flow rate. Specifically, when the flow switch detects that the pipeline is full of electrolyte, the gas delivery pipeline 102 is closed, and the liquid delivery pipeline 103 is opened, allowing electrolyte to be delivered through the liquid delivery pipeline 103. When the flow switch detects that the electrolyte contains gas, it controls the nitrogen flow rate into the tanker to increase, replacing more electrolyte. Simultaneously, the liquid delivery pipeline 103 is closed, and the gas delivery pipeline 102 is opened, allowing electrolyte to be delivered from the gas delivery pipeline 102 using nitrogen pressure.
[0051] The electrolyte chamber also returns electrolyte to the top of tank S-2 through the third return pipeline 80. This is to ensure that the liquid can flow back when the electrolyte is not in use at the end, thus preventing the electrolyte from becoming stagnant.
[0052] Sampling points 200 are set up downstream of each parallel infusion pipeline and at each production process node to sample the electrolyte when needed.
[0053] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications are all within the protection scope of the claims of the present invention.
Claims
1. An electrolyte supply control system, characterized in that, The system includes a storage warehouse and a production warehouse. The storage warehouse contains electrolyte storage tanks T-1, T-2, ..., T-N, where N is greater than or equal to 2. The top of each electrolyte storage tank is connected to a first delivery pipeline via a branch line equipped with a pneumatic diaphragm valve. This first delivery pipeline is used to connect to an electrolyte tanker truck. Furthermore, a parallel electrically explosion-proof magnetic pump delivery pipeline is connected to the bottom of T-1, and the output end of this parallel electrically explosion-proof magnetic pump delivery pipeline is connected to the first delivery pipeline. The top of T~1 is connected to its bottom via a pipeline equipped with an electrical explosion-proof magnetic pump. Furthermore, the top of T~n-1 is connected to the top and bottom of T~n via a pipeline, and an electrical explosion-proof magnetic pump is installed on the pipeline connecting the top and bottom. n is less than or equal to N and greater than 1. The bottom of lines T~2 to T~N are connected to a second infusion line via pipelines. Multiple third infusion lines branch off from the second infusion line, supplying electrolyte to electrolyte buffer tanks in various production warehouses. Each production warehouse is equipped with electrolyte buffer tanks S~1, S~2, ..., S~M, where M is greater than or equal to 2. A third infusion line connects to the top of electrolyte buffer tank S~1. Furthermore, a first return line branches off from the third infusion line connecting to electrolyte buffer tank S~1, and this first return line connects to the third infusion line. The bottom of S~1 is also connected to the top of S~2, ..., S~M via parallel electrical explosion-proof magnetic pump delivery pipelines. The bottom of tanks S~2, ..., S~M is connected to the production electrolyte supply pipelines, which are connected to the electrolyte chamber. The electrolyte chamber supplies electrolyte to various production process nodes through multiple pipelines.
2. The electrolyte supply control system according to claim 1, characterized in that, It also connects to the breather valve via a pipeline from the top of T~1 to T~N, and the breather valve is connected to the VOC system via a flame arrester. S~1 to S~M are also connected to another breather valve via pipelines, and the other breather valve is connected to the VOC system via another flame arrester.
3. The electrolyte supply control system according to claim 1, characterized in that, A nitrogen pipeline is also provided, which is connected to the top of the electrolyte storage tank and the electrolyte buffer tank, and the nitrogen pipeline is also connected to the electrolyte tanker.
4. The electrolyte supply control system according to claim 3, characterized in that, Parallel filter pipelines are installed on the nitrogen pipelines corresponding to T~1 to T~N. Each filter pipeline is equipped with a filter. Pressure reducing valves are connected to the upstream and downstream of the parallel filter pipelines. After passing through the two pressure reducing valves, the nitrogen gas flows to the top of T~1 to T~N. In addition, a branch line is also branched between the parallel filter pipeline and the downstream pressure reducing valve, which is connected to the breather valve and the flame arrester. The nitrogen pipelines corresponding to tanks S~1 to S~M pass through a pressure reducing valve, a parallel filter pipeline, and another pressure reducing valve in sequence before connecting to tanks S~1 to S~M, as well as between the breather valve and the flame arrester.
5. The electrolyte supply control system according to claim 3, characterized in that, The first infusion line has a gas delivery line and a liquid delivery line connected in parallel. A flow switch is installed on the liquid delivery line, and this flow switch is electrically connected to a valve on the nitrogen line. When the flow switch detects that the line is entirely filled with electrolyte, the gas delivery line is closed, and the liquid delivery line is opened, allowing the electrolyte to be delivered through the liquid delivery line. When the flow switch detects that the electrolyte contains gas, it increases the flow rate of nitrogen into the tanker, closes the liquid delivery line, and opens the gas delivery line, using nitrogen pressure to deliver the electrolyte from the gas delivery line. Furthermore, at least one of the following is equipped with a parallel electrically explosion-proof magnetic pump delivery pipeline: downstream of the flow switch on the liquid delivery pipeline, on the third delivery pipeline, and on the electrolyte supply pipeline. Each electrically explosion-proof magnetic pump delivery pipeline is equipped with an electrically explosion-proof magnetic pump and an electric valve. One of the electrically explosion-proof magnetic pump delivery pipelines serves as a backup pipeline. By measuring the real-time pressure change of the electrically explosion-proof magnetic pump delivery pipeline, the opening of the electric valve in the electrically explosion-proof magnetic pump delivery pipeline is adjusted according to the pressure change to ensure constant pressure in the electrically explosion-proof magnetic pump delivery pipeline. An emergency shut-off valve is also installed downstream of the parallel electrically explosion-proof magnetic pump delivery pipeline.
6. The electrolyte supply control system according to claim 1, characterized in that, The electrolyte chamber also returns electrolyte to the top of tanks S~2,……, through the third return pipeline.
7. The electrolyte supply control system according to claim 1, characterized in that, Each electrolyte storage tank is equipped with a level gauge. For any electrolyte storage tank, when the first high level is reached, the corresponding pneumatic diaphragm valve closes. When the second high level is reached, the pump supplying electrolyte to the tank stops running and generates an alarm signal. The second high level is higher than the first high level. When the tank reaches the first low level, the pump supplying electrolyte to the tank starts running to replenish the electrolyte. When the tank reaches the second low level, the pump supplying electrolyte from the tank stops running and generates an alarm signal. The second low level is lower than the first low level. Furthermore, S~1 to S~M are also equipped with high and low liquid level protection.
8. The electrolyte supply control system according to claim 1, characterized in that, Each of the S~1 to S~M is equipped with a jacket, which is connected to the circulating cooling water. The temperature of the circulating cooling water is controlled by the electrolyte temperature data emitted by the temperature sensor connected to the tank.
9. The electrolyte supply control system according to claim 1, characterized in that, The effective volume of tank T-1 is equal to the effective volume of the electrolyte tank truck. After the electrolyte tank truck has finished transporting the electrolyte, tank T-1 remains empty.
10. The electrolyte supply control system according to claim 1, characterized in that, The top of S~2 to S~M is connected to the spare tank via a second reflux line.
11. The electrolyte supply control system according to claim 5, characterized in that, All tanks and equipment in the storage and production warehouses are placed in drip trays, which are also equipped with leak detection sensors. If an electrolyte leak is detected, the pump on the pipeline where the leak is located will be stopped, the corresponding emergency shut-off valve will be closed, and the emergency fan will be turned on.
12. The electrolyte supply control system according to claim 1, characterized in that, The indoor electrolyte pipeline is made of 316L sanitary stainless steel, while the outdoor electrolyte pipeline is made of PFA pipe with a PVC sleeve.