Preparation system for preparing battery electrolyte

Abstract

The utility model provides a preparation system for preparing battery electrolyte, which comprises a PLC (programmable logic controller) control cabinet, a pure water delivery pipeline, a sulfuric acid delivery pipeline, an anhydrous sodium sulfate delivery pipeline, a stirring tank and an acid preparation tank, the anhydrous sodium sulfate delivery pipeline is communicated with the stirring tank, and a liquid delivery circulation pipeline is arranged between the stirring tank and the acid preparation tank. One end of the liquid conveying circulation pipeline is communicated with the stirring tank, the other end of the liquid conveying circulation pipeline is communicated with the acid preparation tank, the pure water conveying pipeline comprises a first pure water conveying pipe and a second pure water conveying pipe, the first pure water conveying pipe is communicated with the stirring tank, and the second pure water conveying pipe is communicated with the acid preparation tank; the liquid conveying circulation pipeline comprises a liquid outlet conveying pipe, a liquid feeding conveying pipe and a diaphragm pump. According to the preparation system, the preparation precision and the preparation safety of sodium sulfate are improved, an automatic distribution mode is adopted, the time and the labor intensity of manual operation are reduced, the overall production efficiency is improved, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery electrolyte, in particular to a preparation system for preparing battery electrolyte. Background Art

[0002] In the battery field, sodium sulfate is one of the important components of battery electrolytes, mainly playing the role of conducting ions. During the operation of the battery, sodium sulfate can stabilize the voltage and increase the capacity and life of the battery. It can transfer charges well and promote the internal reaction of the battery, thereby improving the performance of the battery, stabilizing the voltage and increasing the capacity and life of the battery.

[0003] The traditional method of preparing electrolyte is to directly mix sodium sulfate solid with dilute sulfuric acid (or water) and other electrolyte components to prepare electrolyte. For example, the Chinese patent "Acid Preparation Method in Battery Production" with publication number CN102376986A discloses an acid preparation method in battery production, including (i) weighing raw materials according to the following weight ratio: 53-57 pure water, 42-46 sulfuric acid with a concentration of 98%, and 0.9-1.1 anhydrous uranium sulfate; (ii) selecting a container that can withstand 100°C, first pouring pure water into the container, and then slowly pouring sulfuric acid into the container at a flow rate of 8-12 liters / hour; (iii) when the above container is left to cool to 50-60°C, anhydrous uranium sulfate is added and fully stirred until uniform. The traditional electrolyte preparation scheme has the following shortcomings:

[0004] 1) The distribution method often relies on manual operation, which is not only inefficient, but also difficult to ensure the accuracy and stability of distribution. It is easily interfered by human factors, thus affecting product quality and production efficiency;

[0005] 2) Artificial acid preparation is used, and sulfuric acid is a highly corrosive liquid, which is prone to chemical burns and other accidents during the artificial acid preparation process;

[0006] 3) Sometimes when preparing the electrolyte, it is necessary to use acid of a certain concentration continuously, that is, the acid prepared in the container is required to be continuous, and there is a lack of equipment that can continuously transport the concentrated acid into the container. Utility Model Content

[0007] In view of this, in order to solve the technical problems existing in the prior art, the utility model provides a preparation system which can transport pure water, concentrated sulfuric acid, anhydrous sodium sulfate and sodium sulfate stock solution in the preparation process of sodium sulfate, improves the preparation accuracy and preparation safety of sodium sulfate, adopts an automated delivery method, reduces the time and labor intensity of manual operation, improves the overall production efficiency and improves safety.

[0008] The utility model solves the above technical problems through the following technical solutions:

[0009] The utility model provides a preparation system for preparing battery electrolyte, the preparation system comprises a PLC control cabinet, a pure water delivery pipeline, a sulfuric acid delivery pipeline, an anhydrous sodium sulfate delivery pipeline, a stirring tank, and an acid preparation tank, the anhydrous sodium sulfate delivery pipeline is connected to the stirring tank, an infusion circulation pipeline is arranged between the stirring tank and the acid preparation tank, one end of the infusion circulation pipeline is connected to the stirring tank, and the other end of the infusion circulation pipeline is connected to the acid preparation tank;

[0010] The pure water delivery pipeline includes a first pure water delivery pipe and a second pure water delivery pipe, the first pure water delivery pipe is connected to the stirring tank, a first pure water valve is fixed on the first pure water delivery pipe, the second pure water delivery pipe is connected to the acid preparation tank, and a second pure water valve is fixed on the second pure water delivery pipe;

[0011] The sulfuric acid delivery pipeline includes a first sulfuric acid delivery pipe and a second sulfuric acid delivery pipe, the first sulfuric acid delivery pipe is connected to the stirring tank, a first sulfuric acid inlet valve is fixed on the first sulfuric acid delivery pipe, the second pure water delivery pipe is connected to the acid preparation tank, and a second sulfuric acid inlet valve is fixed on the second pure water delivery pipe;

[0012] A sodium sulfate inlet valve is fixed on the anhydrous sodium sulfate delivery pipeline;

[0013] The upper end of the stirring tank is fixed with a first liquid level sensor, a second liquid level sensor, and a third liquid level sensor in order from top to bottom, and the lower end of the stirring tank is fixed with a quartz heating tube;

[0014] The infusion circulation pipeline includes a liquid outlet delivery pipe, a liquid delivery pipe, and a diaphragm pump. One end of the liquid outlet delivery pipe is connected to the bottom of the stirring tank, and the other end of the liquid outlet delivery pipe is connected to the suction valve port of the diaphragm pump. One end of the liquid delivery pipe is connected to the discharge valve of the diaphragm pump, and the other end of the liquid delivery pipe is connected to the acid preparation tank. A liquid extraction pneumatic valve is fixed on the liquid outlet delivery pipe, and a liquid inlet pneumatic valve is fixed on the liquid delivery pipe.

[0015] The PLC control cabinet is electrically connected to the first pure water valve, the second pure water valve, the first sulfuric acid inlet valve, the second sulfuric acid inlet valve, the sodium sulfate inlet valve, the first liquid level sensor, the second liquid level sensor, the third liquid level sensor, the liquid extraction pneumatic valve, the liquid inlet pneumatic valve, the quartz heating tube, and the stirring motor.

[0016] Furthermore, a temperature sensor is fixed to the other side wall inside the stirring tank.

[0017] Furthermore, the stirring tank includes a stirring motor and a stirring rod, the stirring motor is fixed to the top of the stirring tank, the stirring rod is fixed to the inside of the stirring tank, the rotating end of the stirring motor is arranged downward, the top end of the stirring rod passes through the top of the stirring tank and is connected to the rotating end of the stirring motor, and stirring blades are fixed on the outer periphery of the stirring rod.

[0018] Furthermore, the first pure water delivery pipe and the second pure water delivery pipe are pure water delivery pipes formed by branches of a pure water delivery main pipe.

[0019] Furthermore, the first sulfuric acid delivery pipe and the second sulfuric acid delivery pipe are sulfuric acid delivery pipes formed by branches of a sulfuric acid delivery main pipe.

[0020] Furthermore, the preparation system includes a graphite heat exchanger, and the graphite heat exchanger is placed on one side of the acid preparation tank.

[0021] Furthermore, a liquid inlet circulation pipe is provided between the acid preparation tank and the graphite heat exchanger, one end of the liquid inlet circulation pipe is connected to the acid preparation tank, and the other end of the liquid inlet circulation pipe is connected to the top of the graphite heat exchanger, and a liquid inlet valve is fixed on the liquid inlet circulation pipe, and a liquid outlet circulation pipe is provided between the graphite heat exchanger and the diaphragm pump, one end of the liquid outlet circulation pipe is connected to the bottom end of the graphite heat exchanger, and the other end of the liquid outlet circulation pipe is connected to the diaphragm pump.

[0022] Furthermore, the upper and lower ends of the side wall of the graphite heat exchanger are respectively connected to a cooling water inlet pipe and a cooling water outlet pipe.

[0023] Furthermore, the discharge valve of the diaphragm pump is connected to a finished product delivery pipe.

[0024] Compared with the prior art, the technical solution of the utility model has at least the following beneficial effects:

[0025] The preparation system of the utility model comprises a PLC control cabinet, a pure water delivery pipeline, a sulfuric acid delivery pipeline, an anhydrous sodium sulfate delivery pipeline, a stirring tank, and an acid preparation tank. The anhydrous sodium sulfate delivery pipeline is connected to the stirring tank, and an infusion circulation pipeline is arranged between the stirring tank and the acid preparation tank. One end of the infusion circulation pipeline is connected to the stirring tank, and the other end of the infusion circulation pipeline is connected to the acid preparation tank. The pure water delivery pipeline comprises a first pure water delivery pipe and a second pure water delivery pipe, the first pure water delivery pipe is connected to the stirring tank, the second pure water delivery pipe is connected to the acid preparation tank, and a second pure water valve is fixed on the second pure water delivery pipe. The infusion circulation pipeline comprises a liquid outlet delivery pipe, a liquid delivery pipe, and a diaphragm pump. The utility model can pump the sodium sulfate stock solution in the stirring tank into the acid preparation tank through the liquid outlet delivery pipe, the liquid extraction pneumatic valve, the liquid delivery pipe, the liquid inlet pneumatic valve and the diaphragm pump. The preparation system provided by the utility model improves the preparation accuracy and preparation safety of sodium sulfate, adopts an automated distribution method, reduces the time and labor intensity of manual operation, improves overall production efficiency, and improves safety.

[0026] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following is a detailed description in combination with the preferred embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a system diagram of automatic heating of sodium sulfate in the utility model;

[0028] Figure 2 It is a schematic diagram of the relationship between the stirring tank of the utility model and the pure water delivery pipeline, the sulfuric acid delivery pipeline, and the anhydrous sodium sulfate delivery pipeline;

[0029] Figure 3 This is a schematic diagram of the electrical connection of the human-machine interface, EM231 analog input module, and PLC controller of the utility model;

[0030] Figure 4 This is the electrical wiring diagram of the input and output ports of the PLC controller of the utility model;

[0031] Figure 5 This is the electrical wiring diagram of the stirring motor, diaphragm pump and quartz heating tube of the utility model.

[0032] In the figure: pure water delivery pipeline 1, first pure water delivery pipe 11, first pure water valve 12, second pure water delivery pipe 13, second pure water valve 14, sulfuric acid delivery pipeline 2, first sulfuric acid delivery pipe 21, first sulfuric acid inlet valve 22, second sulfuric acid delivery pipe 23, second sulfuric acid inlet valve 24, anhydrous sodium sulfate delivery pipeline 3, sodium sulfate inlet valve 31, stirring tank 4, stirring motor 41, stirring rod 42, stirring blade 43, first liquid level sensor 44, second liquid level sensor 45, third liquid level sensor Device 46, temperature sensor 47, quartz heating tube 5, acid preparation tank 6, infusion circulation pipeline 7, liquid outlet delivery pipe 71, liquid delivery pipe 72, liquid extraction pneumatic valve 73, diaphragm pump 74, liquid inlet pneumatic valve 75, graphite heat exchanger 8, liquid inlet circulation pipeline 81, liquid inlet valve 811, liquid outlet circulation pipeline 82, cooling water inlet pipe 83, cooling water outlet pipe 84, PLC control cabinet 9, human-machine interface 91, EM231 analog input module 92, PLC controller 93, finished product delivery pipe 10. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with the accompanying drawings, which are part of this specification and illustrate the principle of the present invention through embodiments. Other aspects, features and advantages of the present invention will become clear through the detailed description. In the drawings referred to, the same or similar parts in different figures are represented by the same reference numerals.

[0034] like Figure 1-2As shown, the utility model provides a preparation system for preparing battery electrolyte, the preparation system includes a PLC control cabinet 9, a pure water delivery pipeline 1, a sulfuric acid delivery pipeline 2, an anhydrous sodium sulfate delivery pipeline 3, a stirring tank 4, and an acid preparation tank 6, the anhydrous sodium sulfate delivery pipeline 3 is connected to the stirring tank 4, and an infusion circulation pipeline 7 is arranged between the stirring tank 4 and the acid preparation tank 6, one end of the infusion circulation pipeline 7 is connected to the stirring tank 4, and the other end of the infusion circulation pipeline 7 is connected to the acid preparation tank 6; the pure water delivery pipeline 1 includes a first pure water delivery pipe 11 and a second pure water delivery pipe 13, the first pure water delivery pipe 11 is connected to the stirring tank 4 The first pure water delivery pipe 11 is connected, and a first pure water valve 12 is fixed on the first pure water delivery pipe 11, and the second pure water delivery pipe 13 is connected to the acid preparation tank 6, and a second pure water valve 14 is fixed on the second pure water delivery pipe 13; the sulfuric acid delivery pipeline 2 includes a first sulfuric acid delivery pipe 21 and a second sulfuric acid delivery pipe 23, the first sulfuric acid delivery pipe 21 is connected to the stirring tank 4, and a first sulfuric acid acid inlet valve 22 is fixed on the first sulfuric acid delivery pipe 21, the second pure water delivery pipe 13 is connected to the acid preparation tank 6, and a second sulfuric acid acid inlet valve 24 is fixed on the second pure water delivery pipe 13; a sodium sulfate inlet valve 31 is fixed on the anhydrous sodium sulfate delivery pipeline 3; the stirring tank 4 The upper end of the mixing tank 4 is fixed with a first liquid level sensor 44, a second liquid level sensor 45, and a third liquid level sensor 46 in sequence from top to bottom, and the lower end of the mixing tank 4 is fixed with a quartz heating tube 5; the infusion circulation pipeline 7 includes a liquid outlet delivery pipe 71, a liquid delivery pipe 72, and a diaphragm pump 74, one end of the liquid outlet delivery pipe 71 is connected to the bottom of the mixing tank 4, the other end of the liquid outlet delivery pipe 71 is connected to the suction valve port of the diaphragm pump 74, one end of the liquid delivery pipe 72 is connected to the discharge valve of the diaphragm pump 74, and the other end of the liquid delivery pipe 72 is connected to the acid preparation tank 6, and the liquid outlet delivery pipe 71 is fixed with a liquid extraction pneumatic valve 73 A liquid inlet pneumatic valve 75 is fixed on the liquid delivery pipe 72; the utility model can pump the sodium sulfate stock solution in the stirring tank 4 into the acid preparation tank 6 through the liquid outlet delivery pipe 71, the liquid extraction pneumatic valve 73, the liquid delivery pipe 72, the liquid inlet pneumatic valve 75 and the diaphragm pump 74; the PLC control cabinet 9 is electrically connected with the first pure water valve 12, the second pure water valve 14, the first sulfuric acid inlet valve 22, the second sulfuric acid inlet valve 24, the sodium sulfate inlet valve 31, the first liquid level sensor 44, the second liquid level sensor 45, the third liquid level sensor 46, the liquid extraction pneumatic valve 73, the liquid inlet pneumatic valve 75, the quartz heating tube 5, and the stirring motor 41.

[0035] When the utility model is implemented, a temperature sensor 47 is fixed to the other side wall inside the stirring tank 4, and the temperature sensor 47 inside the stirring tank 4 collects the pure water temperature inside the stirring tank 4 and sends the collected pure water temperature data to the PLC controller 93. The stirring tank 4 includes a stirring motor 41 and a stirring rod 42, the stirring motor 41 is fixed to the top of the stirring tank 4, the stirring rod 42 is fixed to the inside of the stirring tank 4, the rotating end of the stirring motor 41 is set downward, the top end of the stirring rod 42 passes through the top of the stirring tank 4 and is connected to the rotating end of the stirring motor 41, and a stirring blade 43 is fixed on the outer periphery of the stirring rod 42. The stirring motor 41 above the stirring tank 4 is used to drive the stirring rod 42 to rotate, so as to stir the pure water, concentrated sulfuric acid and anhydrous sodium sulfate in the stirring tank 4.

[0036] The first pure water delivery pipe 11 and the second pure water delivery pipe 13 of the utility model are pure water delivery pipes formed by branches of the pure water delivery main pipe, wherein the first pure water delivery pipe 11 is connected to the stirring tank 4, and the second pure water delivery pipe 13 is connected to the acid preparation tank 6. The first sulfuric acid delivery pipe 21 and the second sulfuric acid delivery pipe 23 are sulfuric acid delivery pipes formed by branches of the sulfuric acid delivery main pipe. wherein the first sulfuric acid delivery pipe 21 is connected to the stirring tank 4, and the second sulfuric acid delivery pipe 23 is connected to the acid preparation tank 6.

[0037] In specific implementation, the preparation system of the utility model includes a graphite heat exchanger 8, which is placed on one side of the acid preparation tank 6, and a liquid inlet circulation pipeline 81 is provided between the acid preparation tank 6 and the graphite heat exchanger 8, one end of the liquid inlet circulation pipeline 81 is connected to the acid preparation tank 6, and the other end of the liquid inlet circulation pipeline 81 is connected to the top of the graphite heat exchanger 8, and a liquid inlet valve 811 is fixed on the liquid inlet circulation pipeline 81, and a liquid outlet circulation pipeline 82 is provided between the graphite heat exchanger 8 and the diaphragm pump 74, one end of the liquid outlet circulation pipeline 82 is connected to the bottom end of the graphite heat exchanger 8, and the other end of the liquid outlet circulation pipeline 82 is connected to the diaphragm pump 74. When the sodium sulfate solution with a higher temperature in the acid preparation tank 6 is transported to the graphite heat exchanger 8 through the liquid inlet circulation pipeline 81, the upper and lower ends of the side wall of the graphite heat exchanger 8 are respectively connected to a cooling water inlet pipe 83 and a cooling water outlet pipe 84. The graphite heat exchanger 8 is used for heat exchange and cooling. The cooled sodium sulfate solution is then transported back to the acid preparation tank 6 through the liquid circulation pipeline 82 and the diaphragm pump 74 to achieve the purpose of circulation cooling.

[0038] In the utility model, the discharge valve of the diaphragm pump 74 is connected with the finished product delivery pipe 10 .

[0039] like Figure 3-5As shown, the PLC control cabinet 9 of the utility model includes a human-machine interface 91, a PLC controller 93, and an EM231 analog input module 92. The EM231 analog input module 92 adopts the 6ES7231-0HC22-0XA8 model. The human-machine interface 91 uses the human-machine control touch screen TPC7062TX (KX). The PLC controller 93 adopts the Siemens 6ES7214-2BD23-0XB8 model. An RS-485 bus is provided between the EM231 analog input module 92 and the PLC control cabinet 9. The EM231 analog input module 92 adopts the RS-485 bus. The line is communicatively connected to the PLC control cabinet 9, an RS-232 bus is provided between the PLC controller 93 and the human-machine interface 91, the PLC controller 93 is communicatively connected to the human-machine interface 91 using the RS-232 bus, the input port of the PLC controller 93 is electrically connected to the first liquid level sensor 44, the second liquid level sensor 45, the second liquid level sensor 45, and the temperature sensor 47, respectively, and the output port of the PLC controller 93 is electrically connected to the first pure water valve 12, the second pure water valve 14, the first sulfuric acid inlet valve 22, the second sulfuric acid inlet valve 24, the sodium sulfate inlet valve 31, the quartz heating tube 5, the stirring motor 41, and the diaphragm pump 74, respectively. The PLC control cabinet 9 is electrically connected to the first pure water valve 12, the second pure water valve 14, the first sulfuric acid inlet valve 22, the second sulfuric acid inlet valve 24, the sodium sulfate inlet valve 31, the first liquid level sensor 44, the second liquid level sensor 45, the third liquid level sensor 46, the liquid extraction pneumatic valve 73, the liquid inlet pneumatic valve 75, the quartz heating tube 5, and the stirring motor 41 through the PLC controller 93.

[0040] The specific working process of preparing sodium sulfate, a battery electrolyte, using the preparation system of the utility model is as follows:

[0041] Step 1) Adding pure water: Open the first pure water valve 12 to allow the first pure water delivery pipe 11 where the first pure water valve 12 is located to deliver pure water to the stirring tank 4. After adding 200 kg of pure water to the stirring tank 4, disconnect the pure water valve;

[0042] Step 2) The stirring motor 41 on the stirring tank 4 drives the stirring rod 42 to stir the pure water in the stirring tank 4 for 30 minutes;

[0043] Step 3) Pure water heating: The pure water in the stirring tank 4 is heated by the quartz heating tube 5 in the stirring tank 4;

[0044] Step 4) adding concentrated sulfuric acid: by opening the first sulfuric acid inlet valve 22, the first sulfuric acid delivery pipe 21 where the first sulfuric acid inlet valve 22 is located delivers concentrated sulfuric acid to the inside of the stirring tank 4, and 50 kg of concentrated sulfuric acid is added to the stirring tank 4, and the density of the concentrated sulfuric acid in the stirring tank 4 is adjusted to 1.2-1.4 g / ml;

[0045] Step 5) Preparation of sodium sulfate stock solution: by opening the sodium sulfate inlet valve 31, the anhydrous sodium sulfate delivery pipeline 3 delivers anhydrous sodium sulfate to the stirring tank 4, after adding 50 kg of anhydrous sodium sulfate into the stirring tank 4, the sodium sulfate inlet valve 31 is disconnected, the sodium sulfate delivery pipe stops delivering anhydrous sodium sulfate, and the stirring motor 41 on the stirring tank 4 is turned on for 30 minutes to obtain the sodium sulfate stock solution;

[0046] Step 7) configuration of finished sodium sulfate product: open the diaphragm pump 74 and the liquid extraction pneumatic valve 73, the suction valve of the diaphragm pump 74 sucks the sodium sulfate stock solution into the diaphragm pump 74 through the liquid outlet delivery pipe 71, open the liquid inlet pneumatic valve 75, pump the sodium sulfate stock solution into the acid preparation tank 6 through the discharge valve of the diaphragm pump 74 and the liquid delivery pipe 72, then open the second pure water valve 14, so that the second pure water delivery pipe 13 where the second pure water valve 14 is located delivers pure water to the acid preparation tank 6, open the second sulfuric acid acid inlet valve 24, and the second sulfuric acid delivery pipe 23 on the second sulfuric acid acid inlet valve 24 continuously adds concentrated sulfuric acid to the acid preparation tank 6, and complete the configuration of the finished sodium sulfate product using the acid preparation tank 6;

[0047] Step 8) Transportation of finished sodium sulfate product: The prepared finished sodium sulfate product is transported through the finished product transportation pipe 10.

[0048] Compared with the prior art, the technical solution disclosed in the above embodiment has the following beneficial effects: the preparation system provided by the utility model can automatically convey the pure water, concentrated sulfuric acid, anhydrous sodium sulfate, and sodium sulfate stock solution required for the preparation process of sodium sulfate, thereby reducing the time and labor intensity of manual operation, and can quickly and continuously provide the required anhydrous sodium sulfate for the production link, thereby improving the overall production efficiency, and also reducing the opportunity of direct manual contact with hazardous chemicals, reducing safety risks. A quartz heating tube 5 is provided in the preparation system of the utility model, which can heat the anhydrous sodium sulfate and maintain a suitable temperature. By heating, the anhydrous sodium sulfate can be prevented from crystallizing, solidifying or clogging the pipeline due to too low a temperature during the transportation process, thereby ensuring smooth transportation of the sodium sulfate stock solution, avoiding waste of materials and excessive consumption of energy, and realizing efficient utilization of resources. The preparation system components provided by the utility model are simple in composition and easy to operate. The sodium sulfate stock solution can be automatically conveyed to the acid preparation tank 6, thereby improving the automation degree of the entire sodium sulfate finished product preparation process, being safe and reliable, reducing the time and labor intensity of manual operation, greatly saving labor costs, and being able to quickly and continuously provide the required anhydrous sodium sulfate for the production link, thereby improving the overall production efficiency, and can be widely promoted.

[0049] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A preparation system for preparing battery electrolyte, characterized in that: The preparation system includes a PLC control cabinet, a pure water delivery pipeline, a sulfuric acid delivery pipeline, an anhydrous sodium sulfate delivery pipeline, a stirring tank, and an acid preparation tank. The anhydrous sodium sulfate delivery pipeline is connected to the stirring tank. An infusion circulation pipeline is provided between the stirring tank and the acid preparation tank. One end of the infusion circulation pipeline is connected to the stirring tank, and the other end of the infusion circulation pipeline is connected to the acid preparation tank. The pure water delivery pipeline includes a first pure water delivery pipe and a second pure water delivery pipe, the first pure water delivery pipe is connected to the stirring tank, a first pure water valve is fixed on the first pure water delivery pipe, the second pure water delivery pipe is connected to the acid preparation tank, and a second pure water valve is fixed on the second pure water delivery pipe; The sulfuric acid delivery pipeline includes a first sulfuric acid delivery pipe and a second sulfuric acid delivery pipe, the first sulfuric acid delivery pipe is connected to the stirring tank, a first sulfuric acid inlet valve is fixed on the first sulfuric acid delivery pipe, the second pure water delivery pipe is connected to the acid preparation tank, and a second sulfuric acid inlet valve is fixed on the second pure water delivery pipe; A sodium sulfate inlet valve is fixed on the anhydrous sodium sulfate delivery pipeline; The upper end of the stirring tank is fixed with a first liquid level sensor, a second liquid level sensor, and a third liquid level sensor in order from top to bottom, and the lower end of the stirring tank is fixed with a quartz heating tube; The infusion circulation pipeline includes a liquid outlet delivery pipe, a liquid delivery pipe, and a diaphragm pump. One end of the liquid outlet delivery pipe is connected to the bottom of the stirring tank, and the other end of the liquid outlet delivery pipe is connected to the suction valve port of the diaphragm pump. One end of the liquid delivery pipe is connected to the discharge valve of the diaphragm pump, and the other end of the liquid delivery pipe is connected to the acid preparation tank. A liquid extraction pneumatic valve is fixed on the liquid outlet delivery pipe, and a liquid inlet pneumatic valve is fixed on the liquid delivery pipe. The PLC control cabinet is electrically connected to the first pure water valve, the second pure water valve, the first sulfuric acid inlet valve, the second sulfuric acid inlet valve, the sodium sulfate inlet valve, the first liquid level sensor, the second liquid level sensor, the third liquid level sensor, the liquid extraction pneumatic valve, the liquid inlet pneumatic valve, the quartz heating tube, and the stirring motor.

2. The preparation system for preparing battery electrolyte according to claim 1, characterized in that: A temperature sensor is fixed on the other side wall inside the stirring tank.

3. The preparation system for preparing battery electrolyte according to claim 2, characterized in that: The stirring tank includes a stirring motor and a stirring rod, wherein the stirring motor is fixed to the top of the stirring tank, and the stirring rod is fixed to the inside of the stirring tank. The rotating end of the stirring motor is arranged downward, and the top end of the stirring rod passes through the top of the stirring tank and is connected to the rotating end of the stirring motor. Stirring blades are fixed on the outer periphery of the stirring rod.

4. The preparation system for preparing battery electrolyte according to claim 1, characterized in that: The first pure water delivery pipe and the second pure water delivery pipe are pure water delivery pipes formed by branching from a pure water delivery main pipe.

5. The preparation system for preparing battery electrolyte according to claim 1, characterized in that: The first sulfuric acid delivery pipe and the second sulfuric acid delivery pipe are sulfuric acid delivery pipes formed by branches of a sulfuric acid delivery main pipe.

6. The preparation system for preparing battery electrolyte according to claim 1, characterized in that: The preparation system comprises a graphite heat exchanger, and the graphite heat exchanger is placed on one side of the acid preparation tank.

7. The preparation system for preparing battery electrolyte according to claim 6, characterized in that: A liquid inlet circulation pipeline is provided between the acid preparation tank and the graphite heat exchanger, one end of the liquid inlet circulation pipeline is connected to the acid preparation tank, and the other end of the liquid inlet circulation pipeline is connected to the top of the graphite heat exchanger, and a liquid inlet valve is fixed on the liquid inlet circulation pipeline. A liquid outlet circulation pipeline is provided between the graphite heat exchanger and the diaphragm pump, one end of the liquid outlet circulation pipeline is connected to the bottom end of the graphite heat exchanger, and the other end of the liquid outlet circulation pipeline is connected to the diaphragm pump.

8. The preparation system for preparing battery electrolyte according to claim 7, characterized in that: The upper and lower ends of the side wall of the graphite heat exchanger are respectively connected with a cooling water inlet pipe and a cooling water outlet pipe.

9. The preparation system for preparing battery electrolyte according to claim 1, characterized in that: The discharge valve of the diaphragm pump is connected with a finished product delivery pipe.

Images