An electrolyte cleaning mechanism

Abstract

This utility model provides an electrolyte cleaning mechanism, including a cleaning fluid delivery assembly, an injection pump assembly, and a pneumatic control assembly. The cleaning fluid delivery assembly includes a cleaning fluid storage tank, a cleaning fluid storage tank air pipe, a cleaning fluid storage tank inlet pipe, a cleaning fluid storage tank manual inlet pipe, a cleaning fluid storage tank inlet pipe, a cleaning fluid storage tank inlet filter, a cleaning fluid storage tank outlet pipe, and a cleaning fluid storage tank outlet pipe socket. The injection pump assembly includes multiple injection pump units, the output ends of which respectively deliver cleaning fluid to an injection machine. The pneumatic control assembly is connected to control the air pressure inside the cleaning fluid storage tank. This electrolyte cleaning mechanism is used to clean the injection channels of the injection pump and injection machine, preventing electrolyte crystallization and blockage of the injection channels. The cleaning fluid storage tank inlet filter filters the cleaning fluid, ensuring that no impurities enter the injection pump and injection machine, effectively guaranteeing the cleaning effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery electrolyte filling equipment, and in particular relates to an electrolyte cleaning mechanism. Background Technology

[0002] The process of injecting a specified type and capacity of electrolyte into a lithium battery is called electrolyte injection, which is necessary for establishing the battery's chemical system. Electrolyte injection is divided into the first injection after the battery casing is formed (referred to as first injection) and the second injection after formation (referred to as second injection, also known as replenishment). After the second injection, the battery is evacuated to a pressure of 50±5 kPa, then clean, dry helium is introduced to a pressure of 90±5 kPa, and a sealing pin is immediately driven into the injection hole to complete the entire electrolyte injection process.

[0003] The main components of an electrolyte include conductive salts, solvents, and additives;

[0004] The conductive salts in lithium battery electrolytes are generally lithium salts such as lithium hexafluorophosphate (LiPF6), lithium bisfluorosulfonyl imide (LiFSI), lithium perchlorate (LiClO4), lithium tetrafluoroborate (LiBF4), and lithium hexafluoroarsenate (LiAsF6).

[0005] The solvents in lithium battery electrolytes are mainly carbonates such as ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate, and diethyl carbonate.

[0006] Additives in lithium battery electrolytes include film-forming additives, conductive additives, flame-retardant additives, stabilizers, and inhibitors.

[0007] The commonly used electrolyte is a lithium hexafluorophosphate solution dissolved in a 10-50% ethylene carbonate solvent, forming a lithium hexafluorophosphate-ethylene carbonate solution. At room temperature (25℃) and atmospheric pressure (98 kPa), it is liquid, brown, transparent, non-conductive, highly hygroscopic, and has poor fluidity and wettability on the battery cell electrodes and separator. At room temperature (25℃), it vaporizes at -50 kPa and boils at -20 kPa; at atmospheric pressure (98 kPa), it vaporizes at 65℃ and boils at 80℃. The electrolyte has a tendency to crystallize, and electrolyte residue on the idle injection channels forms crystals that block these channels. Typically, diethyl carbonate (DEC) is used to flush the injection channels to dissolve and remove the crystals. An auxiliary step in the injection process is to clean the injection pump and injection machine channels of the electrolyte crystals before startup. For this purpose, we have developed an electrolyte cleaning mechanism. Utility Model Content

[0008] The purpose of this invention is to provide an electrolyte cleaning mechanism to clean the electrolyte crystals in the injection pump and injection machine's injection channels before starting the battery injection process, thereby preventing electrolyte crystals from clogging the injection channels.

[0009] This utility model is implemented as follows: an electrolyte cleaning mechanism, comprising:

[0010] Cleaning fluid delivery assembly, injection pump assembly, and infusion pneumatic control assembly;

[0011] The cleaning fluid delivery assembly includes a cleaning fluid storage tank, a cleaning fluid storage tank air pipe, a cleaning fluid storage tank inlet pipe, a cleaning fluid storage tank manual inlet pipe, a cleaning fluid storage tank inlet pipe, a cleaning fluid storage tank inlet filter, a cleaning fluid storage tank outlet pipe, and a cleaning fluid storage tank outlet pipe socket.

[0012] The cleaning fluid storage tank is vertically fixed to an external electrolyte injection cabinet or an external electrolyte injection device. The cleaning fluid storage tank air pipe and the cleaning fluid storage tank manual inlet pipe are fixed to the top of the cleaning fluid storage tank. The cleaning fluid storage tank inlet pipe and the cleaning fluid storage tank outlet pipe are fixed to the bottom of the electrolyte defoaming tank. The cleaning fluid storage tank inlet pipe is vertically fixed next to the cleaning fluid storage tank and connects to the cleaning fluid storage tank manual inlet pipe and the cleaning fluid storage tank inlet pipe. The cleaning fluid storage tank inlet filter is set in the middle of the cleaning fluid storage tank inlet pipe. The cleaning fluid storage tank outlet pipe socket is connected to the cleaning fluid storage tank outlet pipe.

[0013] The air pipe of the cleaning fluid storage tank is used to input negative pressure air into the cleaning fluid storage tank. The inlet of the cleaning fluid storage tank is used to input cleaning fluid from the outside. The outlet of the inlet of the cleaning fluid storage tank delivers cleaning fluid to the inlet of the manual inlet pipe and the inlet of the cleaning fluid storage tank, respectively. The outlet of the manual inlet pipe is used to manually add cleaning fluid to the cleaning fluid storage tank. The outlet of the cleaning fluid storage tank is used to automatically add cleaning fluid to the cleaning fluid storage tank. The inlet filter of the cleaning fluid storage tank is used to filter the cleaning fluid. The outlet pipe of the cleaning fluid storage tank is used to output cleaning fluid to the outlet pipe socket of the cleaning fluid storage tank. The outlet pipe socket of the cleaning fluid storage tank is provided with multiple sockets for outputting cleaning fluid to the injection pump assembly.

[0014] The injection pump assembly includes multiple injection pump units, the input ends of the multiple injection pump units are connected in parallel to multiple sockets of the liquid outlet pipe socket of the cleaning liquid storage tank, and the output ends of the multiple injection pump units respectively deliver cleaning liquid to the injection machine.

[0015] The infusion pneumatic control component is connected to control the air pressure inside the cleaning fluid storage tank.

[0016] Furthermore, the cleaning fluid delivery assembly also includes a cleaning fluid storage tank inlet solenoid valve and a cleaning fluid storage tank outlet solenoid valve. The cleaning fluid storage tank inlet solenoid valve is disposed on the cleaning fluid storage tank inlet pipe between the cleaning fluid storage tank manual inlet pipe and the cleaning fluid storage tank inlet pipe, and is used to automatically open or close the output of cleaning fluid to the cleaning fluid storage tank inlet pipe. The cleaning fluid storage tank outlet solenoid valve is disposed on the cleaning fluid storage tank outlet pipe between the cleaning fluid storage tank and the cleaning fluid storage tank outlet pipe socket, and is used to automatically open or close the output of cleaning fluid to the cleaning fluid storage tank outlet pipe socket.

[0017] Furthermore, the cleaning fluid delivery assembly also includes an explosion-proof valve for the cleaning fluid storage tank. The explosion-proof valve is located at the top of the cleaning fluid storage tank and is used to release pressure when the air pressure inside the cleaning fluid storage tank exceeds a preset air pressure to ensure the safety of the cleaning fluid storage tank.

[0018] Furthermore, the cleaning fluid delivery assembly also includes a cleaning fluid storage tank level gauge, which is vertically fixed outside the middle of the cleaning fluid storage tank and communicates with the inside of the cleaning fluid storage tank to display the position of the cleaning fluid level inside the cleaning fluid storage tank.

[0019] Furthermore, the injection pump unit includes an injection pump, an injection pump controller, an injection pump inlet pipe, and an injection pump outlet pipe;

[0020] The injection pump and the injection pump controller are fixed inside an external injection cabinet or injection device. The injection pump inlet pipe is connected between the injection pump inlet and the cleaning fluid storage tank outlet pipe socket of the cleaning fluid delivery assembly for injection. The injection pump outlet pipe is connected to the injection pump outlet for delivering cleaning fluid to the injection machine. The injection pump controller controls the start and stop of the injection pump.

[0021] Furthermore, the infusion pneumatic control assembly includes a control base plate, a pneumatic control air circuit, and a solenoid valve island. The pneumatic control air circuit includes an air inlet pipe, a three-way air valve, a barometer, a filter, and an air outlet pipe.

[0022] The control base plate is fixed inside the external liquid injection cabinet or the liquid injection device. The pneumatic control air circuit and the solenoid valve island are fixed on the control base plate. The three-way air valve and the filter in the pneumatic control air circuit are separated and vertically fixed on the control base plate. The air inlet pipe connects the three-way air valve and the filter. The barometer is connected to the air inlet pipe between the three-way air valve and the filter. The air outlet pipe is connected to the filter and extends to the input end of the air pipe of the cleaning fluid storage tank of the cleaning fluid delivery assembly. The three-way air valve has a three-way air valve port.

[0023] The pneumatic control air circuit, under the control of the solenoid valve island, supplies negative pressure air to the cleaning fluid storage tank of the cleaning fluid delivery assembly. The three-way air valve's air port is used to open under the control of the solenoid valve island to allow air to be added to the cleaning fluid storage tank when the injection pump delivers cleaning fluid to the injection machine, ensuring smooth delivery of the cleaning fluid.

[0024] The beneficial effects of this utility model are as follows:

[0025] The electrolyte cleaning mechanism in this solution can clean electrolyte crystals from the injection channels of the injection pump and injection machine, preventing crystallization from clogging the channels. The cleaning solution storage tank inlet filter filters the cleaning solution, ensuring that no impurities enter the injection pump and injection machine, effectively guaranteeing the cleaning effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the electrolyte cleaning mechanism;

[0027] Figure 2 A schematic diagram of the cleaning fluid delivery assembly;

[0028] Figure 3 A schematic diagram of the injection pump assembly and its injection pump unit;

[0029] Figure 4 This is a schematic diagram of the structure of the infusion pneumatic control component.

[0030] Explanation of reference numerals in the attached figures:

[0031] 210. Injection pump assembly; 211. Injection pump unit; 2111. Injection pump; 2112. Injection pump controller; 2113. Injection pump inlet pipe; 2114. Injection pump outlet pipe;

[0032] 220. Infusion pneumatic control assembly; 221. Control base plate; 222. Pneumatic control air circuit; 2221. Air inlet pipe; 2222. Three-way air valve; 22221. Three-way air valve air outlet; 2223. Barometer; 2224. Filter; 2225. Air outlet pipe; 223. Solenoid valve island;

[0033] 240. Cleaning fluid delivery assembly; 241. Cleaning fluid storage tank; 242. Cleaning fluid storage tank vent pipe; 243. Cleaning fluid storage tank inlet pipe; 244. Cleaning fluid storage tank manual inlet pipe; 245. Cleaning fluid storage tank inlet solenoid valve; 246. Cleaning fluid storage tank inlet pipe; 247. Cleaning fluid storage tank inlet filter; 248. Cleaning fluid storage tank outlet pipe; 249. Cleaning fluid storage tank outlet solenoid valve; 24a. Cleaning fluid storage tank level gauge; 24b. Cleaning fluid storage tank explosion-proof valve; 24c. Cleaning fluid storage tank outlet pipe socket. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. For those skilled in the art, the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0036] See Figure 1-4 This utility model discloses an electrolyte cleaning mechanism, including a cleaning fluid delivery assembly 240, a liquid injection pump assembly 210, and a liquid delivery pneumatic control assembly 220.

[0037] The cleaning fluid delivery assembly 240 includes a cleaning fluid storage tank 241, a cleaning fluid storage tank air pipe 242, a cleaning fluid storage tank inlet pipe 243, a cleaning fluid storage tank manual inlet pipe 244, a cleaning fluid storage tank inlet pipe 246, a cleaning fluid storage tank inlet filter 247, a cleaning fluid storage tank outlet pipe 248, and a cleaning fluid storage tank outlet pipe socket 24c.

[0038] The cleaning fluid storage tank 241 is vertically fixed to the external electrolyte injection cabinet or external electrolyte injection device. The cleaning fluid storage tank air pipe 242 and the cleaning fluid storage tank manual inlet pipe 244 are fixed to the top of the cleaning fluid storage tank 241. The cleaning fluid storage tank inlet pipe 246 and the cleaning fluid storage tank outlet pipe 248 are fixed to the bottom of the electrolyte defoaming tank 2311. The cleaning fluid storage tank inlet pipe 243 is vertically fixed next to the cleaning fluid storage tank 241 and connects the cleaning fluid storage tank manual inlet pipe 244 and the cleaning fluid storage tank inlet pipe 246. The cleaning fluid storage tank inlet filter 247 is set in the middle of the cleaning fluid storage tank inlet pipe 246. The cleaning fluid storage tank outlet pipe socket 24c is connected to the cleaning fluid storage tank outlet pipe 248.

[0039] The cleaning fluid storage tank air pipe 242 is used to input negative pressure air into the cleaning fluid storage tank 241. The inlet end of the cleaning fluid storage tank inlet pipe 243 is used to input cleaning fluid from the outside. The outlet end of the cleaning fluid storage tank inlet pipe 243 delivers cleaning fluid to the inlet end of the cleaning fluid storage tank manual inlet pipe 244 and the inlet end of the cleaning fluid storage tank inlet pipe 246 respectively. The outlet end of the cleaning fluid storage tank manual inlet pipe 244 is used to manually add cleaning fluid to the cleaning fluid storage tank 241. The outlet end of the cleaning fluid storage tank inlet pipe 246 is used to automatically add cleaning fluid to the cleaning fluid storage tank 241. The cleaning fluid storage tank inlet filter 247 is used to filter the cleaning fluid. The cleaning fluid storage tank outlet pipe 248 is used to output cleaning fluid to the cleaning fluid storage tank outlet pipe socket 24c. The cleaning fluid storage tank outlet pipe socket 24c is provided with multiple sockets for outputting cleaning fluid to the injection pump assembly 210.

[0040] The injection pump assembly 210 includes multiple injection pump units 211. The input ends of the multiple injection pump units 211 are connected in parallel to multiple sockets of the liquid outlet pipe socket 24c of the cleaning liquid storage tank. The output ends of the multiple injection pump units 211 respectively deliver cleaning liquid to the injection machine.

[0041] The infusion pneumatic control assembly 220 is connected to control the air pressure inside the cleaning fluid storage tank 241.

[0042] In this embodiment, the cleaning fluid delivery assembly further includes a cleaning fluid storage tank inlet solenoid valve 245 and a cleaning fluid storage tank outlet solenoid valve 249. The cleaning fluid storage tank inlet solenoid valve 245 is disposed on the cleaning fluid storage tank inlet pipe between the cleaning fluid storage tank manual inlet pipe 244 and the cleaning fluid storage tank inlet pipe 246, and is used to automatically open or close the output of cleaning fluid to the cleaning fluid storage tank inlet pipe 246. The cleaning fluid storage tank outlet solenoid valve 249 is disposed on the cleaning fluid storage tank outlet pipe 248 between the cleaning fluid storage tank 241 and the cleaning fluid storage tank outlet pipe socket 24c, and is used to automatically open or close the output of cleaning fluid to the cleaning fluid storage tank outlet pipe socket 24c.

[0043] In this embodiment, the cleaning fluid delivery assembly 240 also includes a cleaning fluid storage tank explosion-proof valve 24b, which is located on the top of the cleaning fluid storage tank 241 and is used to release pressure when the air pressure in the cleaning fluid storage tank 241 exceeds the preset air pressure to ensure the safety of the cleaning fluid storage tank 241.

[0044] In this embodiment, the cleaning fluid delivery assembly 240 also includes a cleaning fluid storage tank level gauge 24a, which is vertically fixed outside the middle of the cleaning fluid storage tank 241 and communicates with the inside of the cleaning fluid storage tank 241 to display the position of the cleaning fluid level inside the cleaning fluid storage tank 241.

[0045] In this embodiment, the injection pump unit 211 includes an injection pump 2111, an injection pump controller 2112, an injection pump inlet pipe 2113, and an injection pump outlet pipe 2114.

[0046] The injection pump 2111 and the injection pump controller 2112 are located in a fixed external injection cabinet or injection device. The injection pump inlet pipe 2113 is connected between the inlet of the injection pump 2111 and the outlet pipe socket 24c of the cleaning fluid storage tank of the cleaning fluid delivery assembly 240 for injection. The injection pump outlet pipe 2114 is connected to the outlet of the injection pump 2111 for delivering cleaning fluid to the injection machine. The injection pump controller 2112 controls the start and stop of the injection pump 2111.

[0047] In this embodiment, the infusion pneumatic control assembly 220 includes a control base plate 221, a pneumatic control air passage 222, and a solenoid valve island 223. The pneumatic control air passage 222 includes an air inlet pipe 2221, a three-way air valve 2222, a barometer 2223, a filter 2224, and an air outlet pipe 2225.

[0048] The control base plate 221 is fixed inside the external liquid injection cabinet or the liquid injection device. The pneumatic control air circuit 222 and the solenoid valve island 223 are fixed on the control base plate 221. The three-way air valve 2222 and the filter 2224 in the pneumatic control air circuit 222 are separated and vertically fixed on the control base plate 221. The air inlet pipe 2221 is connected to the three-way air valve 2222 and the filter 2224. The barometer 2223 is connected to the air inlet pipe 2221 between the three-way air valve 2222 and the filter 2224. The air outlet pipe 2225 is connected to the filter 2224 and extends to the input end of the air pipe 242 of the cleaning fluid storage tank of the cleaning fluid delivery assembly 240. The three-way air valve 2222 has a three-way air valve port 22221.

[0049] Under the control of the solenoid valve island 223, the pneumatic control air circuit 222 supplies negative pressure air to the cleaning fluid storage tank 241 of the cleaning fluid delivery assembly 240. The three-way air valve 2222's three-way air valve port 22221 is used to replenish air to the cleaning fluid storage tank 241 when the injection pump 211 is opened to deliver cleaning fluid to the injection machine under the control of the solenoid valve island 223, so as to ensure smooth delivery of cleaning fluid.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrolyte cleaning mechanism, characterized in that, include: Cleaning fluid delivery assembly (240), injection pump assembly (210), and infusion pneumatic control assembly (220); The cleaning fluid delivery assembly (240) includes a cleaning fluid storage tank (241), a cleaning fluid storage tank air pipe (242), a cleaning fluid storage tank inlet pipe (243), a cleaning fluid storage tank manual inlet pipe (244), a cleaning fluid storage tank inlet pipe (246), a cleaning fluid storage tank inlet filter (247), a cleaning fluid storage tank outlet pipe (248), and a cleaning fluid storage tank outlet pipe socket (24c). The cleaning fluid storage tank (241) is vertically fixed to an external electrolyte injection cabinet or electrolyte injection device. The cleaning fluid storage tank air pipe (242) and the cleaning fluid storage tank manual inlet pipe (244) are fixed to the top of the cleaning fluid storage tank (241). The cleaning fluid storage tank inlet pipe (246) and the cleaning fluid storage tank outlet pipe (248) are fixed to the bottom of the electrolyte defoaming tank (2311). The cleaning fluid storage tank inlet pipe (243) is vertically fixed next to the cleaning fluid storage tank (241) and connects the cleaning fluid storage tank manual inlet pipe (244) and the cleaning fluid storage tank inlet pipe (246). The cleaning fluid storage tank inlet filter (247) is set in the middle of the cleaning fluid storage tank inlet pipe (246). The cleaning fluid storage tank outlet pipe socket (24c) is connected to the cleaning fluid storage tank outlet pipe (248). The air pipe (242) of the cleaning fluid storage tank is used to input negative pressure air into the cleaning fluid storage tank (241). The inlet end of the liquid inlet pipe (243) of the cleaning fluid storage tank is used to input cleaning fluid from the outside. The outlet end of the liquid inlet pipe (243) of the cleaning fluid storage tank supplies cleaning fluid to the inlet end of the manual liquid inlet pipe (244) and the inlet end of the liquid inlet pipe (246) of the cleaning fluid storage tank, respectively. The outlet end of the manual liquid inlet pipe (244) of the cleaning fluid storage tank is used to supply cleaning fluid to the cleaning fluid storage tank. The storage tank (241) is manually filled with cleaning fluid. The output end of the inlet pipe (246) of the cleaning fluid storage tank is used to automatically fill the cleaning fluid storage tank (241). The inlet filter (247) of the cleaning fluid storage tank is used to filter the cleaning fluid. The outlet pipe (248) of the cleaning fluid storage tank is used to output the cleaning fluid to the outlet pipe socket (24c) of the cleaning fluid storage tank. The outlet pipe socket (24c) of the cleaning fluid storage tank is provided with multiple sockets for outputting the cleaning fluid to the injection pump assembly (210). The injection pump assembly (210) includes multiple injection pump units (211), the input ends of the multiple injection pump units (211) are connected in parallel to multiple sockets of the outlet pipe socket (24c) of the cleaning fluid storage tank, and the output ends of the multiple injection pump units (211) respectively deliver cleaning fluid to the injection machine. The infusion pneumatic control component (220) is connected to control the air pressure inside the cleaning fluid storage tank (241).

2. The electrolyte cleaning mechanism according to claim 1, characterized in that, The cleaning fluid delivery assembly also includes a cleaning fluid storage tank inlet solenoid valve (245) and a cleaning fluid storage tank outlet solenoid valve (249). The cleaning fluid storage tank inlet solenoid valve (245) is located on the cleaning fluid storage tank inlet pipe between the cleaning fluid storage tank manual inlet pipe (244) and the cleaning fluid storage tank inlet pipe (246), and is used to automatically open or close the output of cleaning fluid to the cleaning fluid storage tank inlet pipe (246). The cleaning fluid storage tank outlet solenoid valve (249) is located on the cleaning fluid storage tank outlet pipe (248) between the cleaning fluid storage tank (241) and the cleaning fluid storage tank outlet pipe socket (24c), and is used to automatically open or close the output of cleaning fluid to the cleaning fluid storage tank outlet pipe socket (24c).

3. The electrolyte cleaning mechanism according to claim 2, characterized in that, The cleaning fluid delivery assembly (240) also includes a cleaning fluid storage tank explosion-proof valve (24b), which is located on the top of the cleaning fluid storage tank (241) and is used to open and release pressure when the air pressure in the cleaning fluid storage tank (241) exceeds the preset air pressure to ensure the safety of the cleaning fluid storage tank (241).

4. The electrolyte cleaning mechanism according to claim 2, characterized in that, The cleaning fluid delivery assembly (240) also includes a cleaning fluid storage tank level gauge (24a), which is vertically fixed outside the middle of the cleaning fluid storage tank (241) and communicates with the inside of the cleaning fluid storage tank (241) to display the position of the cleaning fluid level inside the cleaning fluid storage tank (241).

5. The electrolyte cleaning mechanism according to claim 1, characterized in that, The injection pump unit (211) includes an injection pump (2111), an injection pump controller (2112), an injection pump inlet pipe (2113), and an injection pump outlet pipe (2114). The injection pump (2111) and the injection pump controller (2112) are fixed inside an external injection cabinet or injection device. The injection pump inlet pipe (2113) is connected between the inlet of the injection pump (2111) and the outlet pipe socket (24c) of the cleaning fluid storage tank of the cleaning fluid delivery assembly (240) for injection. The injection pump outlet pipe (2114) is connected to the outlet of the injection pump (2111) for delivering cleaning fluid to the injection machine. The injection pump controller (2112) controls the start and stop of the injection pump (2111).

6. The electrolyte cleaning mechanism according to claim 1, characterized in that, The infusion pneumatic control assembly (220) includes a control base plate (221), a pneumatic control air passage (222), and a solenoid valve island (223). The pneumatic control air passage (222) includes an air inlet pipe (2221), a three-way air valve (2222), a barometer (2223), a filter (2224), and an air outlet pipe (2225). The control base plate (221) is fixed inside the external liquid injection cabinet or the liquid injection device. The pneumatic control air circuit (222) and the solenoid valve island (223) are fixed on the control base plate (221). The three-way air valve (2222) and the filter (2224) in the pneumatic control air circuit (222) are separated and vertically fixed on the control base plate (221). The air inlet pipe (2221) connects the three-way air valve (2222) and the filter. The device (2224), the barometer (2223) is connected to the air inlet pipe (2221) located between the three-way air valve (2222) and the filter (2224), the air outlet pipe (2225) is connected to the filter (2224) and extends to the input end of the air pipe (242) of the cleaning fluid storage tank of the cleaning fluid delivery assembly (240), and the three-way air valve (2222) has a three-way air valve port (22221). The pneumatic control air circuit (222) supplies negative pressure air to the cleaning fluid storage tank (241) of the cleaning fluid delivery assembly (240) under the control of the solenoid valve island (223). The three-way air valve (2222) is used to open the air port (22221) under the control of the solenoid valve island (223) to supply air to the cleaning fluid storage tank (241) when the injection pump unit (211) delivers cleaning fluid to the injection machine to ensure smooth delivery of cleaning fluid.

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