CN217507615U

CN217507615U - Lithium ion battery negative pressure liquid injection system

Info

Publication number: CN217507615U
Application number: CN202221015927.9U
Authority: CN
Inventors: 邓昌沪; 吴松彦
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-09-27
Anticipated expiration: 2032-04-29

Abstract

A negative pressure liquid injection system of a lithium ion battery comprises an electromagnet quick interface iron core coil, an armature, a straight-through electromagnetic valve, a variable volume liquid storage device, a metering pump, an electrolyte storage tank, a negative pressure generator, a three-way hose and a connecting hose; the electrolyte injection process comprises the steps of injecting electrolyte from an electrolyte storage tank → a metering pump → a connecting hose → two # electromagnet quick interface iron core coils → two # armatures → a connecting hose → two # straight-through electromagnetic valves → a connecting hose → a variable volume reservoir → a connecting hose → a # straight-through electromagnetic valve → a connecting hose → a # electromagnet quick interface iron core coil → a # armature → an injection process in a lithium ion battery cavity, belongs to a closed pipeline, isolates moisture in air, does not need exhaust of an exhaust system of a drying room and a glove box, and the electromagnet quick interface iron core coils and the armatures attract and release attraction, and can meet the functional requirements of an automatic system by electrifying and powering off.

Description

Negative pressure liquid injection system of lithium ion battery

Technical Field

The invention relates to a lithium ion battery manufacturing technology, in particular to a lithium ion battery negative pressure liquid injection system.

Background

The national lithium ion battery output in 2021 is 324GWH, the lithium ion battery output is continuously increased, the influence of electrolyte on the environment in the production process of the lithium ion battery cannot be ignored, the national electrolyte market in 2020 is 25 ten thousand tons of published documents, the main components of the electrolyte are dimethyl sulfate, diethyl carbonate, ethylene carbonate, lithium hexafluorophosphate and the like, and the liquid injection process in the production process of the lithium ion battery is characterized in that in order to avoid the electrolyte from absorbing moisture in the air, some liquid injection processes adopt a drying room to open and inject liquid, some liquid injection processes adopt a glove box to inject liquid, and the two modes are a significant environmental pollution source to the gas exhausted from the liquid injection drying room and the glove box. Lithium hexafluorophosphate in the electrolyte is easy to hydrolyze in the air environment to generate harmful substances such as phosphorus pentafluoride, hydrogen fluoride and the like, which is a great threat to soil and water resources.

Disclosure of Invention

The invention provides a lithium ion battery negative pressure liquid injection system for preventing a liquid injection process dehumidification and air exhaust system from discharging harmful substances, aiming at the defect that harmful substances are discharged in the dehumidification and air exhaust process of liquid injection in a drying room and liquid injection in a glove box.

Technical scheme for realizing negative pressure liquid injection system of lithium ion battery

A negative-pressure liquid injection system of a lithium ion battery comprises a first electromagnet rapid interface iron core coil, a first armature, a first through electromagnetic valve, a variable-volume liquid storage device, a second through electromagnetic valve, a second electromagnet rapid interface iron core coil, a second armature, a metering pump, an electrolyte storage tank, a third through electromagnetic valve, a third electromagnet rapid interface iron core coil, a third armature, a negative pressure generator, a three-way hose and a connecting hose;

the three-way hose comprises a three-way hose hard end which is a connecting pipe communicated with a number one straight-through electromagnetic valve and a number three straight-through electromagnetic valve of a number one electromagnet quick interface iron core coil;

a number one is communicated with a connecting pipe of the variable volume reservoir through the electromagnetic valve;

a connecting pipe of a two-number straight-through electromagnetic valve communicated with the variable-volume reservoir;

the connecting pipe of the secondary through electromagnetic valve and the secondary armature communicated with each other comprises an end head sleeve;

the liquid outlet nozzle connecting pipe of the secondary electromagnet rapid interface iron core coil intercommunication metering pump comprises a hose rigid end head;

the connecting pipe of the rapid interface iron core coil of the three-number electromagnet communicated with the three-number straight-through electromagnetic valve comprises a rigid end;

the quick interface iron core coil circle center of the electromagnet No. one is provided with a three-way hose hard end of a three-way hose;

the armature No. one is embedded and installed at the top end of the armature installation seat, an end socket seat is installed at the circle center of the armature installation seat, and the bottom end of the armature installation seat is tangent to the top end of the lithium battery and is meshed and locked with the radial external thread of the armature installation seat along the internal thread of the opening of the lithium battery locking sleeve;

an end sealing ring is arranged at the tangent position of the hard end of the three-way hose and the end sleeve seat;

an end face sealing ring is arranged in the center of the bottom end face of the armature mounting seat;

when the electromagnet quick interface iron core coil I is electrified, the electromagnet quick interface iron core coil I is attracted with the armature I;

when the electromagnet quick interface iron core coil and the armature iron are attracted, the end sealing ring is tightly pressed and sealed by the hard end of the three-way hose and the opposite end head sleeve seat;

when the quick interface iron core coil of the electromagnet No. one is powered off, the electromagnet is attracted and released;

the center of the coil of the quick interface iron core of the No. two electromagnet is provided with a hose rigid end connected with a hose;

the armature II is embedded and arranged at the top end of the armature mounting seat, and an end head sleeve is arranged at the circle center of the armature II and the armature mounting seat;

a clamping sealing ring is arranged at the tangent position of the rigid end head of the hose and the end head sleeve;

the end head sleeve is an extension section connected with the hose;

when the quick interface iron core coil of the No. two electromagnet is electrified, the quick interface iron core coil of the No. two electromagnet is attracted with the No. two armature;

when the coil of the quick interface iron core of the electromagnet II and the armature II are attracted, the end sealing ring is mutually compressed and sealed by the end head sleeve and the opposite rigid end of the hose;

when the coil of the quick interface iron core of the electromagnet II is powered off, the electromagnet II is attracted and released;

the circle center of the three-number electromagnet quick interface iron core coil is provided with a rigid end head of a connecting hose;

the three-armature is embedded at the top end of the armature fixing seat, and a rigid end cap is arranged at the circle center of the three-armature and the armature mounting seat;

a clamping seal ring is arranged at the tangent position of the rigid end head and the rigid end head sleeve;

an end face sealing ring is arranged in the center of the bottom end face of the armature fixed seat;

when the three-number electromagnet quick interface iron core coil is electrified, the three-number electromagnet quick interface iron core coil is attracted with the two-number and three-number armatures;

when the three-number electromagnet rapid interface iron core coil and the three-number armature are attracted, the end sealing ring is mutually pressed and sealed by the rigid end head sleeve and the opposite rigid end;

when the three-number electromagnet quick interface iron core coil is powered off, the three-number electromagnet quick interface iron core coil is pulled in and released;

the variable volume liquid reservoir comprises a connecting hose, a connecting hose and a variable volume liquid reservoir;

the volume-variable liquid accumulator is of a sealed bag structure and is made of soft PVC resin materials, the soft bag type container is made of the PVC resin materials, when the soft bag type container is empty, the shape of the flexible bag is flat and flat, when liquid is injected, the soft bag is expanded along with the increase of the volume, when the volume in the bag is reduced, the inner volume is reduced along with the reduction of the volume and flat, and compared with a rigid container, the reduction of the volume in the soft bag does not form negative pressure to cause the liquid in the bag to be difficult to flow out;

the metering pump adopts one of a plunger type metering liquid injection pump with controllable flow or a rotary valve type metering liquid injection pump with controllable flow;

the negative pressure generator comprises an air suction pump, a frame, an electric cylinder and a driving motor;

the air pump comprises a piston pull rod, a flange pump cylinder, an air exhaust through hole, an external thread convex end cover, an end cover sealing ring, a sealing sliding ring, an expansion ring, an end cover locking bolt, a flange end cover, an end port sealing ring, a piston and a convex end cover locking bolt;

wherein, the piston pull rod and the piston are in a connected structure;

the sealing sliding ring and the expansion ring are embedded in the radial direction of the piston and are tangent to the inner diameter of the flange pump cylinder, the outer diameter of the expansion ring is tangent to the inner circle of the sealing sliding ring, and the elasticity of the expansion ring enables the sealing sliding ring to be in sliding sealing fit with the inner diameter of the flange pump cylinder; when the piston slides to the flange end cover, air is extracted from the air extraction through hole;

the sealing slip ring is an L-shaped ring and is made of one of polytetrafluoroethylene and polyurethane rubber;

the expansion ring is an O-shaped ring and is made of one of ethylene propylene diene monomer and fluororubber;

the electric cylinder mainly comprises a driving motor, a cylinder body and a transmission device. When the driving motor runs, the ball screw pair is driven to rotate by the speed reducer and the reversing gear transmission mechanism; the lead screw nut is radially connected with the push rod, the lead screw nut and the push rod do reciprocating linear motion under the driving of the rotary torque of the lead screw, the electric cylinder is a mechanical device for converting the rotary motion of a driving motor shaft into the linear motion, and is a highly mature electromechanical product, and the market can be supplied with electric cylinder commodities of various types and specifications, and the types matched with power can be selected.

The through electromagnetic valve is a standardized product and is controlled by an electromagnetic pulse pilot to open and close the diaphragm instantly. The diaphragm of the straight-through electromagnetic pulse valve is usually made of high-performance polytetrafluoroethylene, has organic solvent resistance and stable temperature performance, and ensures long-term reliable work of the straight-through electromagnetic pulse valve. The available specification and model of the market are not complete, and the model with adaptive flow can be selected.

A liquid outlet pipe below the electrolyte storage tank is connected with an inlet of a metering pump, and the metering pump is connected with a II-grade electromagnet quick interface iron core coil through a liquid outlet nozzle through a connecting hose; the rigid end of the hose connected with the hose penetrates through the center of the coil of the quick interface iron core of the No. II electromagnet; when the quick interface iron core coil of the second electromagnet is attracted with the second armature, the rigid end of the hose is inserted into an end cap arranged in the center of the armature fixing seat, and the clamping sealing ring is pressed tightly under the attraction force of the quick interface iron core coil of the second electromagnet and the second armature, so that the sealing effect is achieved;

a connecting hose led out from an end head sleeve in the center of the armature fixing seat is connected with a No. two through electromagnetic valve, a connecting hose connected with an outlet at the lower part of the No. two through electromagnetic valve is connected with a variable volume reservoir, and a connecting hose connected at the lower part of the variable volume reservoir is connected with a No. one through electromagnetic valve;

the three-way hose is communicated with one of the three-way hose and is connected with a hard end of the three-way hose passing through the center of the electromagnet quick interface iron core coil I, the armature I is arranged below the electromagnet quick interface iron core coil I, the armature I is embedded above the armature installation seat, the lower part of an end socket seat arranged in the center of the armature installation seat is tangent to the top end surface of the lithium battery, and the radial external thread of the armature installation seat is meshed and locked with the opening edge internal thread of the battery locking sleeve;

when the radial external thread of the armature mounting seat is meshed and locked with the opening edge internal thread of the battery locking sleeve, the end face sealing ring is oppositely pressed and sealed by the end socket sleeve seat and the top end face of the lithium battery;

the other end of the three-way hose is connected with a three-way straight-through electromagnetic valve, and the three-way straight-through electromagnetic valve is connected with a three-way electromagnet quick interface iron core coil through a connecting hose;

the hard end of the hose of the connecting hose passes through the center of the three-number electromagnet quick interface iron core coil and is inserted into the rigid end arranged in the center of the armature fixed seat;

when the three-number electromagnet rapid interface iron core coil and the three-number armature are attracted, the rigid end and the rigid end are oppositely pressed to clamp the sealing ring to achieve sealing connection;

when the internal thread of armature fixing base and the protruding end cover of external screw thread of aspiration pump meshing locking, compress tightly the sealing washer and be compressed tightly sealed in opposite directions by armature fixing base, the protruding end cover of external screw thread for when the through-hole of bleeding of the protruding end cover of external screw thread bleeds through coupling hose, the armature fixing base does not take place to leak with the connection structure of the protruding end cover of external screw thread.

The structure and the working principle of the negative pressure generator

The negative pressure generator comprises an air suction pump, a rack, an electric cylinder, a driving motor, a piston pull rod, a connecting lock sleeve and an electric cylinder telescopic rod; the air suction pump is arranged above the rack, the electric cylinder is arranged below the rack, a piston pull rod of the air suction pump is arranged and connected with a lock sleeve, and a telescopic rod of the electric cylinder is coupled with the piston pull rod of the air suction pump by the connection lock sleeve;

when the electric cylinder is driven by the driving motor, the telescopic rod of the electric cylinder does telescopic motion, the piston pull rod coupled with the telescopic rod of the electric cylinder stretches along with the telescopic rod, the piston pull rod does telescopic motion, the piston at the end of the piston pull rod reciprocates in the flange pump cylinder, when the piston reciprocates in the flange pump cylinder, the sealing slide ring embedded in the radial direction of the piston, the expansion ring moves along with the piston, and the sealing action of the sealing slide ring on the inner wall of the flange pump cylinder enables the piston to form air suction when moving towards the direction of the flange end cover, and the air suction through hole is an air suction and inlet channel; the expansion ring expands the sealing slip ring to the inner wall of the flange pump barrel and keeps the piston at the end of the piston pull rod in the reciprocating motion process in the flange pump barrel to realize dynamic sealing, so that the air pump can achieve larger air suction negative pressure.

When the internal thread of the armature fixing seat is in threaded engagement with the top end of the external thread convex end cover, the external thread convex end cover is opposite to the armature fixing seat to press the pressing sealing ring tightly, and when the air pump pumps air, no leakage is kept from the connecting hose to the air pumping through hole air passage;

in the liquid injection process, electrolyte enters a closed pipeline in a lithium ion battery cavity from an electrolyte storage tank → a metering pump → a connecting hose → a two-type electromagnet quick interface iron core coil → a two-type armature → a connecting hose → a variable volume reservoir → a connecting hose → a one-type straight-through electromagnetic valve → a connecting hose → a one-type electromagnet quick interface iron core coil → a one-type armature → a liquid injection process in the lithium ion battery cavity, moisture in air is isolated, air exhaust of an air exhaust system of a drying room and a glove box is not needed, pollution of electrolyte volatile matters exhausted by dehumidifying and air exhaust of the existing drying room and glove box liquid injection process to the environment is avoided, and meanwhile, due to the fact that a dehumidifying and air exhaust device of the drying room and the glove box liquid injection process is not needed to operate, energy consumption of the operation of the dehumidifying and air exhaust device of the drying room and the glove box is saved, the electrolyte enters the lithium ion battery shell through the closed pipeline, the electrolyte completely isolates moisture in the air, which is beneficial to improving the quality of the lithium ion battery.

The electromagnet quick interface iron core coil I, the electromagnet quick interface iron core coil II, the electromagnet quick interface iron core coil III and the electromagnet quick interface iron core coil III are attracted and released, and the functional requirements of an automatic system can be met through the power-on and power-off operations of the electromagnet quick interface iron core coil I, the electromagnet quick interface iron core coil II and the electromagnet quick interface iron core coil III.

The positive effect produced by the negative pressure liquid injection system of the lithium ion battery

The liquid process of annotating, electrolyte arrives the liquid process of annotating in the lithium ion battery cavity from the electrolyte storage tank, belong to the closed pipeline, moisture in the air has been kept apart, need not the drying room, the exhaust system of glove box airs exhaust, the pollution of the dehumidification exhaust electrolyte volatile matter to the environment of having avoided current drying room, glove box notes liquid technology, simultaneously, owing to need not the drying room, the dehumidification exhaust equipment operation of glove box notes liquid technology, the drying room has been saved, the operation energy resource consumption of glove box dehumidification exhaust equipment, annotate the liquid process, get into whole closed pipeline in the lithium ion battery shell from the electrolyte storage tank, make the moisture in the air of electrolyte totally isolated, favorable lithium ion battery quality promotes.

Drawings

FIG. 1 is a diagram of a negative pressure injection system of a lithium ion battery according to the present invention;

in the figure, 1 lithium battery, 2a electromagnet quick interface iron core coil, 2b armature, 3 a straight-through electromagnetic valve, 4 variable volume reservoir, 5 two straight-through electromagnetic valve, 6a two electromagnet quick interface iron core coil, 6b two armature, 7 metering pump, 8 electrolyte storage tank, 9 three straight-through electromagnetic valve, 10a three electromagnet quick interface iron core coil, 10b three armature, 11 negative pressure generator, G2 three-way hose, G3 connecting hose, G4 connecting hose, G5 connecting hose, G6 connecting hose, G9 connecting hose;

the G2 three-way hose comprises a G2d three-way hose hard end which is a connecting pipe communicated with a No. one electromagnet quick interface iron core coil 2a, a No. one straight-through electromagnetic valve 3 and a No. three straight-through electromagnetic valve 9;

g3 connecting hose is a connecting pipe communicated with the variable volume reservoir 4 through the electromagnetic valve 3;

g4 connecting hose is a connecting pipe of a two-number straight-through solenoid valve 5 communicated with the variable volume reservoir 4;

the G5 connecting hose comprises an end head sleeve 6d which is a connecting pipe of a double-type through electromagnetic valve 5 and a double-type armature 6 b;

the G6 connecting hose comprises a hose rigid end G6d which is a liquid outlet nozzle connecting pipe of a secondary electromagnet quick interface iron core coil 6a communicated with the metering pump 7;

the G9 connecting hose comprises a rigid end G9d which is a connecting pipe of a three-way solenoid valve 9 intercommunicated three-way electromagnet quick interface iron core coil 10 a;

FIG. 2 is a diagram of movable components of the negative pressure electrolyte injection system of the lithium ion battery of the present invention;

in the figure, 2a, one electromagnet fast interface iron core coil, 3 a through electromagnetic valve, 4 variable volume reservoir, 5 two through electromagnetic valve, 6b two armature, 9 three through electromagnetic valve, 10a three electromagnet fast interface iron core coil;

g2 three-way hose is the connecting pipe of the first electromagnet fast interface iron core coil 2a, the first straight-through electromagnetic valve 3, the third straight-through electromagnetic valve 9;

g3 is connected with a hose, which is a connecting pipe of a number one of straight-through electromagnetic valves 3 communicated with a variable volume reservoir 4;

g4 is connected with a hose, which is a connecting pipe of a double-number straight-through electromagnetic valve 5 communicated with the variable-volume reservoir 4;

g5 is connected with a hose, which is a connecting pipe of a No. II armature 6b communicated with a No. II straight-through electromagnetic valve 5;

g9 connecting hose is a connecting pipe of three-number straight-through electromagnetic valve 9 and three-number electromagnet quick interface iron core coil 10 a;

FIG. 3 is a diagram of the connection between the movable parts of the negative pressure liquid injection system of the lithium ion battery and the lithium battery 1 and the three-number armature 10 b;

in the figure, 1 lithium battery, 2a electromagnet quick interface iron core coil, 2b armature, 3 a straight-through electromagnetic valve, 4 variable volume reservoir, 5 two straight-through electromagnetic valve, 6b two armature, 9 three straight-through electromagnetic valve, 10a three electromagnet quick interface iron core coil;

g2 three-way hose, which is a connecting pipe communicated with the first electromagnet fast interface iron core coil 2a, the first straight-through electromagnetic valve 3 and the third straight-through electromagnetic valve 9;

FIG. 4 is a schematic view showing the arrangement of lithium batteries 1 and armatures 2b in a negative pressure injection system of a lithium ion battery according to the present invention;

in the figure, 1 lithium battery, 2b armature iron of No. one;

FIG. 5 is a schematic view showing the connection positions of a secondary electromagnet quick interface iron core coil, a 7-type metering pump and an 8-type electrolyte storage tank of the negative pressure electrolyte injection system 6a of the lithium ion battery of the present invention;

in the figure, 6a two electromagnet quick interface iron core coil, 7 metering pump, 8 electrolyte storage tank;

the G6 connecting hose is a connecting pipe of a secondary electromagnet quick interface iron core coil 6a communicated with the metering pump 7;

FIG. 6 is a schematic view of a negative pressure generator 11 connected to a No. 10b three armature of the negative pressure liquid injection system of the lithium ion battery of the present invention;

in the figure, 11 negative pressure generators and 10b three armatures;

FIG. 7 is a view of the structure of the first armature 2b and the first electromagnet fast interface iron core coil 2a of the negative pressure injection system of the lithium ion battery of the present invention;

in the figure, a G2 three-way hose is an electromagnet quick interface iron core coil 2a, an electromagnet quick interface electromagnetic valve 3 and a three-way electromagnetic valve 9 which are communicated with each other, a G2d three-way hose hard end, an electromagnet quick interface iron core coil 2a, an armature 2b A, an armature 2c mounting seat, a 2d end socket seat, a 2e end sealing ring, a 2f end surface sealing ring and a 2G radial external thread;

FIG. 8 is a diagram of a double electromagnet quick interface iron core coil and a double armature actuation structure of a lithium ion battery negative pressure

electrolyte injection system

6a and 6b of the present invention;

in the figure, the G6 connecting hose is a connecting pipe for the second electromagnet quick interface iron core coil 6a to communicate with the metering pump 7;

the rigid end of the G6d hose, the coil of the quick interface iron core of the No. 6a two electromagnet, the No. 6b two armature, the 6c armature fixing seat, the 6d end head sleeve, the 6e clamping sealing ring and the G5 connecting hose are connecting pipes which are communicated with the No. two armature 6b of the No. two through electromagnetic valve 5;

FIG. 9 is a diagram of a structure of a three-number electromagnet rapid interface core coil and a 10b three-number armature pull-in of a lithium ion battery negative pressure liquid injection system of the present invention;

in the figure, a G9 connecting hose is a connecting pipe of a three-way solenoid valve 9 intercommunicated three-electromagnet quick interface iron core coil 10a, a G9d rigid end, a 10a three-way electromagnet quick interface iron core coil, a 10b three-way armature, a 10c armature fixed seat, a 10d rigid end head sleeve, a 10e clamping seal ring, a 11f pressing seal ring and a 10G internal thread;

FIG. 10 is a schematic view of a variable volume reservoir of the negative pressure injection system of the lithium ion battery of the present invention;

in the figure, the G3 connecting hose is a connecting pipe communicated with the variable volume reservoir 4 by the No. one through electromagnetic valve 3, and the G4 connecting hose is a connecting pipe communicated with the No. two through electromagnetic valve 5 by the variable volume reservoir 4 and the 4-volume variable reservoir;

FIG. 11 is a diagram of a lithium ion battery locking sleeve of the lithium ion battery negative pressure fluid injection system of the present invention;

in the figure, a blind bottom sleeve 1c and a port 1b are along an internal thread;

FIG. 12 is a schematic view of the negative pressure generator 11 of the lithium ion battery negative pressure injection system of the present invention;

in the figure, 11a of a suction pump, 11b of a frame, 11g of an electric cylinder and 11m of a driving motor;

FIG. 13 is a left side view of FIG. 11;

in the figure, 11a of an air pump, 11b of a rack, 11c of a piston pull rod, 11d of a connecting lock sleeve, 11e of an electric cylinder telescopic rod and 11g of an electric cylinder;

FIG. 14 is a schematic view of the suction pump of the negative pressure generator 11 of the negative pressure injection system of the lithium ion battery of the present invention;

in the figure, 11c piston pull rod, 11a air pump, 11L external thread convex end cover and 11v flange end cover;

fig. 15 is a diagram of an electric cylinder of the negative pressure generator 11 of the negative pressure injection system of the lithium ion battery of the present invention;

in the figure, 11e is an electric cylinder telescopic rod, 11g is an electric cylinder and 11m is a driving motor;

FIG. 16 is a diagram of the fixing structure of the No. one electromagnet fast interface iron core coil 2a, the No. one armature 2b, the lithium battery 1 and the battery locking sleeve 1h of the lithium ion battery negative pressure liquid injection system of the present invention;

in the figure, a lithium battery 1, a lithium battery locking sleeve 1h, a port 1b are provided with internal threads, a G2 three-way hose is an electromagnet quick interface iron core coil 2a at one, a through electromagnetic valve 3 at one, an intercommunicating connection pipe of a three-way electromagnetic valve 9 at three, a G2d three-way hose hard end, an electromagnet quick interface iron core coil 2a at one, an armature 2b at one, an armature mounting seat 2c, an end socket 2d, an end sealing ring 2e, an end sealing ring 2f and an external thread 2G in the radial direction;

FIG. 17 is a cross-sectional view of FIG. 14;

in the figure, 11c piston pull rod, 11h flange pump cylinder, 11k air exhaust through hole, 11L external thread convex end cover, 11j end cover sealing ring, 11s sealing slip ring, 11t expansion ring, 11n end cover locking bolt, 11v flange end cover, 11i port sealing ring, 11u piston and 11p convex end cover locking bolt;

FIG. 18 is a diagram of the connection structure of an 11a air pump and a 10b three-armature, 10a three-electromagnet quick interface core coil of the lithium ion battery negative pressure injection system of the present invention;

in the figure, a G9 connecting hose is a connecting pipe of a three-number straight-through electromagnetic valve 9 and a three-number electromagnet quick interface iron core coil 10 a; g9d rigid end, a No. 10a three electromagnet fast interface iron core coil, a No. 10b three armature, a 10c armature fixed seat, a 10d rigid end head sleeve, a 10e clamping seal ring, a 11f pressing seal ring, a 10G internal thread, a 11c piston pull rod, a 11h flange pump cylinder, a 11k air exhaust through hole, a 11L external thread convex end cover, a 11j end cover seal ring, a 11s sealing slide ring, a 11t expansion ring, a 11n end cover locking bolt, a 11v flange end cover, a 11i port seal ring, a 11u piston and a 11p convex end cover locking bolt;

Detailed Description

The following detailed description of the embodiments will be made with reference to the accompanying drawings

A negative pressure liquid injection system of a lithium ion battery comprises a first electromagnet quick interface iron core coil 2a, a first armature 2b, a first through electromagnetic valve 3, a variable volume liquid storage device 4, a second through electromagnetic valve 5, a second electromagnet quick interface iron core coil 6a, a second armature 6b, a metering pump 7, an electrolyte storage tank 8, a third through electromagnetic valve 9, a third electromagnet quick interface iron core coil 10a, a third armature 10b and a negative pressure generator 11;

the center of the core coil 2a of the quick interface iron core of the electromagnet No. one is provided with a three-way hose hard end G2d of a three-way hose G2;

the armature 2b No. I is installed at the top end of the armature installation seat 2c in an embedded mode, the armature 2b No. I and the circle center of the armature installation seat 2c are provided with an end socket seat 2d, the bottom end of the armature installation seat 2c is tangent to the top end of the lithium battery 1, and the opening of the lithium battery locking sleeve 1h is meshed and locked with the radial external thread 2g of the armature installation seat 2c along the internal thread 1 b;

an end sealing ring 2e is arranged at the tangent position of the hard end G2d of the three-way hose and the end sleeve seat 2 d;

an end face sealing ring 2f is arranged in the center of the bottom end face of the armature mounting seat 2 c;

when the electromagnet quick interface iron core coil 2a is electrified, the electromagnet quick interface iron core coil 2a is attracted with the armature 2 b;

when the electromagnet quick interface iron core coil 2a and the armature 2b are attracted, the end sealing ring 2e is mutually pressed and sealed by the hard end G2d of the three-way hose and the opposite end sleeve seat 2 d;

when the electromagnet quick interface iron core coil 2a is powered off, the electromagnet quick interface iron core coil is attracted and released;

the center of the coil 6a of the secondary electromagnet quick interface iron core is provided with a hose rigid end G6d connected with a hose G6;

the No. two armature 6b is embedded and installed at the top end of the armature installation seat 6c, and an end head sleeve 6d is installed at the circle centers of the No. two armature 6b and the armature installation seat 2 c;

a clamping seal ring 6e is arranged at the tangent position of the rigid end G6d of the hose and the end head sleeve 6 d;

the end head sleeve 6d is an extension section connected with a hose G5;

when the coil 6a of the quick interface iron core of the second electromagnet is electrified, the coil 6a of the quick interface iron core of the second electromagnet is attracted with the armature 6b of the second electromagnet; when the coil 6a and the armature 6b of the secondary electromagnet quick interface iron core are attracted, the end sealing ring 6e is mutually pressed and sealed by the end head sleeve 6d and the opposite hose rigid end G6 d;

when the coil 6a of the quick interface iron core of the secondary electromagnet is powered off, the attraction and the release are carried out;

the circle center of the three-number electromagnet quick interface iron core coil 10a is provided with a rigid end G9d connected with a hose G9;

the three-armature 10b is embedded at the top end of the armature fixed seat 10c, and a rigid end cap 10d is arranged at the circle centers of the three-armature 10b and the armature installation seat 2 c;

a clamping seal ring 10e is arranged at the tangent position of the rigid end head G9d and the rigid end head sleeve 10 d;

an end face sealing ring 11f is arranged in the center of the bottom end face of the armature fixed seat 10 c; when the three-electromagnet quick interface iron core coil 10a is electrified, the three-electromagnet quick interface iron core coil 10a and the three-armature 10b are attracted;

when the three-electromagnet fast interface iron core coil 10a and the three-armature 10b are attracted, the end sealing ring 10e is mutually compressed and sealed by the rigid end cap 10d and the opposite rigid end G9 d;

when the three-number electromagnet quick interface iron core coil 10a is powered off, the three-number electromagnet quick interface iron core coil is pulled in and released;

the variable volume liquid storage device 4 comprises a connecting hose G3, a connecting hose G4 and the variable volume liquid storage device 4; the volume-variable liquid storage device 4 is of a sealed bag structure and is made of a soft PVC resin material, the soft bag type container is made of the PVC resin material, when the soft bag type container is empty, the shape of the soft bag is flat, when liquid is injected, the soft bag expands along with the increase of the volume, when the volume in the bag is reduced, the inner volume is reduced along with the reduction of the volume and flat, and compared with a rigid container, the reduction of the volume in the soft bag does not form negative pressure to cause the liquid in the bag to be difficult to flow out;

the metering pump 7 adopts one of a plunger type metering liquid injection pump with controllable flow or a rotary valve type metering liquid injection pump with controllable flow;

the negative pressure generator 11 comprises a suction pump 11a, a frame 11b, an electric cylinder 11g and a driving motor 11 m;

the air extracting pump 11a comprises a piston pull rod 11c, a flange pump barrel 11h, an air extracting through hole 11k, an external thread convex end cover 11L, an end cover sealing ring 11j, a sealing sliding ring 11s, an expansion ring 11t, an end cover locking bolt 11n, a flange end cover 11v, a port sealing ring 11i, a piston 11u and a convex end cover locking bolt 11 p; wherein, the piston pull rod 11c and the piston 11u are in a connected structure;

the sealing slip ring 11s and the expansion ring 11t are embedded in the radial direction of the piston 11u, and are tangent to the inner diameter of the flange pump barrel 11h, the outer diameter of the expansion ring 11t is tangent to the inner circle of the sealing slip ring 11s, and the elasticity of the expansion ring 11t enables the sealing slip ring 11s to be in sliding sealing fit with the inner diameter of the flange pump barrel 11 h; when the piston 11u slides to the flange end cover 11v, air is extracted from the extraction through hole 11 k;

the sealing slip ring 11s is an L-shaped ring and is made of one of polytetrafluoroethylene and polyurethane rubber;

the expansion ring 11t is an O-shaped ring and is made of one of ethylene propylene diene monomer and fluororubber;

the electric cylinder 11g mainly comprises a driving motor, a cylinder body and a transmission device. When the driving motor runs, the ball screw pair is driven to rotate by the speed reducer and the reversing gear transmission mechanism; the lead screw nut is radially connected with the push rod, the lead screw nut and the push rod do reciprocating linear motion under the driving of the rotary torque of the lead screw, the electric cylinder is a mechanical device for converting the rotary motion of a driving motor shaft into the linear motion, and is a highly mature electromechanical product, and the market can be supplied with electric cylinder commodities of various types and specifications, and the types matched with power can be selected.

As shown in fig. 1, a liquid outlet pipe below the electrolyte storage tank 8 is connected with an inlet of the metering pump 7, and the metering pump 7 is connected with a secondary electromagnet quick interface iron core coil 6a through a liquid outlet nozzle through a connecting hose G6;

as shown in fig. 8, the rigid end G6d of the hose G6 passes through the center of the coil 6a of the quick interface iron core of the electromagnet; when the coil 6a of the double-electromagnet quick interface iron core is attracted with the double-armature 6b, the rigid end G6d of the hose is inserted into the end cap 6d arranged at the center of the armature fixing seat 6c, and the clamping sealing ring 6e is pressed tightly under the attraction force of the coil 6a of the double-electromagnet quick interface iron core and the double-armature 6b, so that the sealing effect is achieved;

a connecting hose G5 led out from an end head sleeve 6d in the center of the armature fixing seat 6c is connected with the secondary through electromagnetic valve 5, a connecting hose G4 connected with an outlet at the lower part of the secondary through electromagnetic valve 5 is connected with the variable-volume reservoir 4, and a connecting hose G3 connected with the lower part of the variable-volume reservoir 4 is connected with the primary through electromagnetic valve 3;

as shown in fig. 16, the three-way hose G2 is connected to a three-way hose hard end G2d passing through the center of a number one electromagnet quick interface iron core coil 2a, a number one armature 2b is arranged below the number one electromagnet quick interface iron core coil 2a, the number one armature 2b is embedded above an armature installation seat 2c, the lower part of an end socket seat 2d arranged at the center of the armature installation seat 2c is tangent to the top end face of the lithium battery 1, and a radial external thread 2G of the armature installation seat 2c is meshed and locked with an opening of a battery locking sleeve 1h along an internal thread 1 b; when the radial external thread 2g of the armature installation seat 2c is meshed and locked with the opening edge internal thread 1b of the battery locking sleeve 1h, the end face sealing ring 2f is oppositely pressed and sealed by the end socket sleeve seat 2d and the top end face of the lithium battery 1; the other end of the three-way hose G2 is connected with the three-way solenoid valve 9, and the three-way solenoid valve 9 is connected with the three-way electromagnet quick interface iron core coil 10a through a connecting hose G9;

as shown in fig. 9 and 18, a hose hard end G9d connected with a hose G9 passes through the center of a triple electromagnet quick interface iron core coil 10a and is inserted into a rigid end 10d installed at the center of an armature fixing seat 10 c;

when the three-number electromagnet quick interface iron core coil 10a and the three-number armature 10b are attracted, the rigid end G9d and the rigid end 10d are oppositely pressed to clamp the sealing ring 10e to achieve sealing connection;

when the internal thread 10G of the armature fixing seat 10c is meshed and locked with the external thread convex end cover 11L of the air extracting pump 11a, the pressing sealing ring 11f is pressed and sealed oppositely by the armature fixing seat 10c and the external thread convex end cover 11L, so that when the air extracting through hole 11k of the external thread convex end cover 11L extracts air through the connecting hose G9, the connecting structure of the armature fixing seat 10c and the external thread convex end cover 11L does not leak.

The structure and the working principle of the negative pressure generator 11

As shown in fig. 12 and 13, the negative pressure generator 11 includes a suction pump 11a, a frame 11b, an electric cylinder 11g, a driving motor 11m, a piston rod 11c, a connecting lock sleeve 11d, and an electric cylinder expansion rod 11 e;

the air pump 11a is mounted above the rack 11b, the electric cylinder 11g is mounted below the rack 11b, the piston pull rod 11c of the air pump 11a is mounted and connected with the lock sleeve 11d, and the electric cylinder telescopic rod 11e is coupled with the piston pull rod 11c of the air pump 11a by connecting the lock sleeve 11 d;

the air extracting pump 11a comprises a piston pull rod 11c, a flange pump barrel 11h, an air extracting through hole 11k, an external thread convex end cover 11L, an end cover sealing ring 11j, a sealing sliding ring 11s, an expansion ring 11t, an end cover locking bolt 11n, a flange end cover 11v, a port sealing ring 11i, a piston 11u and a convex end cover locking bolt 11 p;

when the electric cylinder 11g is driven by the driving motor 11m, the electric cylinder telescopic rod 11e makes telescopic motion, the electric cylinder telescopic rod and the piston pull rod 11c coupled with the electric cylinder telescopic rod extend and contract along with the electric cylinder telescopic rod, the piston pull rod 11c makes telescopic motion, the piston 11u at the end of the piston pull rod 11c reciprocates in the flange pump cylinder 11h, when the piston 11u reciprocates in the flange pump cylinder 11h, the sealing slip ring 11s embedded in the radial direction of the piston 11u, the expansion ring 11t moves along with the piston 11u, and the sealing slip ring 11s has sealing effect on the inner wall of the flange pump cylinder 11h, so that the piston 11u forms air extraction when moving towards the direction of the flange end cover 11v, and the air extraction through hole 11k is an air extraction and intake channel;

the expansion ring 11t expands the sealing slip ring 11s against the inner wall of the flange pump barrel 11h, and keeps the piston 11u at the end of the piston pull rod 11c in the reciprocating motion process in the flange pump barrel 11h to seal dynamically, so that the air pump 11a can achieve larger air suction negative pressure.

As shown in fig. 18, when the internal thread 10G of the armature fixing seat 10c is threadedly engaged with the top end of the external thread convex end cover 11L, the external thread convex end cover 11L is opposite to the armature fixing seat 10c to press the pressing seal ring 11f, and when the air pump 11a pumps air, the air path from the connecting hose G9 to the air pumping through hole 11k keeps no leakage;

liquid injection operation step:

firstly, as shown in fig. 5, a coil 6a of a two-grade electromagnet quick interface iron core of a negative-pressure liquid injection system of a lithium ion battery is connected with a liquid outlet nozzle of a metering pump 7 through a connecting hose G6, and a liquid inlet of the metering pump 7 is connected with an electrolyte storage tank 8;

secondly, as shown in fig. 2, an electromagnet quick interface iron core coil 2a, a straight-through electromagnetic valve 3 and a straight-through electromagnetic valve 9 are connected by a three-way hose G2;

a straight-through electromagnetic valve 3 of No. one is connected with a variable volume reservoir 4 through a hose G3;

the variable-volume reservoir 4 is connected with the secondary-type straight-through solenoid valve 5 through a hose G4;

the two-number straight-through electromagnetic valve 5 and the two-number armature 6b are connected by a hose G5;

the three-way solenoid valve 9 and the three-electromagnet quick interface iron core coil 10a are connected by a hose G9 to form a movable part of the lithium ion battery negative pressure liquid injection system;

thirdly, as shown in fig. 3 and 16, connecting the armature 2b of number one on the top end surface of the lithium battery 1 with the fast interface iron core coil 2a of number one electromagnet; the lithium battery 1 is meshed with the radial external thread 2g of the armature mounting seat 2c along the internal thread 1b through the opening of the lithium battery locking sleeve 1 h;

the electromagnet quick interface iron core coil 2a is electrified to lead the armature 2b to be attracted with the electromagnet quick interface iron core coil 2 a;

fourthly, as shown in fig. 1, on the basis of the third step, the fast interface iron core coil 6a of the electromagnet II is connected with the armature 6b of the electromagnet II, and the fast interface iron core coil 6a of the electromagnet II is electrified to pull in the fast interface iron core coil 6a of the electromagnet II and the armature 6b of the electromagnet II;

fifthly, as shown in fig. 1 and fig. 18, connecting the three-type armature 10b with the three-type electromagnet rapid interface iron core coil 10 a; wherein, the internal thread 10g of the armature permanent seat 10c is meshed and locked with the external thread convex end cover 11L of the air extracting pump 11 a;

the three-number electromagnet quick interface iron core coil 10a is electrified, so that the three-number electromagnet quick interface iron core coil 10a and the three-number armature 10b are attracted;

sixthly, starting the negative pressure generator 11 to pump the variable volume liquid storage device 4 and the inner cavity of the lithium battery 1 to negative pressure when the No. one straight-through electromagnetic valve 3 is in an opening position, the No. two straight-through electromagnetic valve 5 is in a closing position and the No. three straight-through electromagnetic valve 9 is in an opening position;

seventhly, the three-way solenoid valve 9 is in a closed position, the one-way solenoid valve 3 is in a closed position, the two-way solenoid valve 5 is in an open position, the metering pump 7 is started, the electrolyte in the electrolyte storage tank 8 enters the variable-volume reservoir 4, when the preset liquid amount is reached, the metering pump 7 is stopped, and the two-way solenoid valve 5 is in a closed position;

immediately, the through electromagnetic valve 3 of No. one is in an opening position, the negative pressure in the cavity of the lithium battery 1 sucks the electrolyte in the variable-volume reservoir 4 into the cavity of the lithium battery 1, and the electrolyte injection is finished;

eighthly, the fast interface iron core coil 2a of the electromagnet No. one is powered off, the armature 2b No. one is released and attracted,

the opening of the locking sleeve 1h of the lithium ion battery is unscrewed, the internal thread 1b is meshed with the radial external thread 2g of the armature installation seat 2c, and the lithium battery 1 which is injected with liquid is removed.

In the liquid injection process, electrolyte is injected into a battery cavity from an electrolyte storage tank 8 → a metering pump 7 → a connecting hose G6 → a II electromagnet quick interface iron core coil 6a → an II armature 6b → a connecting hose G5 → an II straight-through electromagnetic valve 5 → a connecting hose G4 → a variable volume reservoir 4 → a connecting hose G3 → an I straight-through electromagnetic valve 3 → a connecting hose G2 → an I electromagnet quick interface iron core coil 2a → an I armature 2b → lithium ions 1, and the whole process belongs to a closed pipeline.

The next lithium battery 1 enters a liquid injection process;

at the moment, the fast interface iron core coil 2a of the electromagnet No. one is in a standby state;

a lithium battery 1 is meshed with a radial external thread 2g of an armature mounting seat 2c along an internal thread 1b through an opening of a lithium ion battery locking sleeve 1h, and a first electromagnet quick interface iron core coil 2a is electrified to attract a first armature 2b and a first electromagnet quick interface iron core coil 2 a;

repeating the sixth step, enabling the first straight-through electromagnetic valve 3 to be in an opening position, the second straight-through electromagnetic valve 5 to be in a closing position, and the third straight-through electromagnetic valve 9 to be in an opening position, starting the negative pressure generator 11, and pumping the variable volume liquid storage device 4 and the inner cavity of the lithium battery 1 to negative pressure;

repeating the seventh step, enabling the three-way solenoid valve 9 to be in a closed position, enabling the one-way solenoid valve 3 to be in a closed position, enabling the two-way solenoid valve 5 to be in an open position, starting the metering pump 7, enabling the electrolyte in the electrolyte storage tank 8 to enter the variable-volume reservoir 4, stopping the metering pump 7 when a preset liquid amount is reached, and enabling the two-way solenoid valve 5 to be in a closed position;

then, the one-number straight-through electromagnetic valve 3 is in an open position, the negative pressure in the cavity of the lithium battery 1 sucks the electrolyte in the variable volume reservoir 4 into the cavity of the lithium battery 1, and the electrolyte injection is finished;

repeating the eighth step, cutting off the electromagnet quick interface iron core coil 2a, releasing and attracting the armature 2b, unscrewing the opening of the lithium ion battery locking sleeve 1h, meshing the internal thread 1b with the radial external thread 2g of the armature mounting seat 2c, and removing the lithium battery 1 after liquid injection;

continuously operating according to the steps, namely performing batch production;

further, in order to improve the production efficiency, the time taken for the electrolyte in the variable volume reservoir 4 to enter the cavity of the lithium battery 1 is reduced, and the operation is performed according to the following steps:

according to the above, in the process of the seventh step, the electrolyte in the variable volume reservoir 4 is not completely absorbed into the cavity of the lithium battery 1;

namely, the coil 6a of the quick interface iron core of the second electromagnet is powered off, and the second armature 6b is released to be attracted;

meanwhile, the three-number electromagnet quick interface iron core coil 10a is powered off, and the three-number armature 10b is released for suction;

the armature 6b, the connecting hose G5, the direct solenoid valve 5, the connecting hose G4, the variable volume reservoir 4, the connecting hose G3, the direct solenoid valve 3, the three-way hose G2, the electromagnet quick interface iron core coil 2a, the armature 2b, the three-way solenoid valve 9, the hose G9, the electromagnet quick interface iron core coil 10a, the lithium battery 1, the lithium battery locking sleeve 1h and the armature mounting seat 2c are all moved out together;

the electrolyte in the variable volume reservoir 4 is sucked by the negative pressure in the cavity of the lithium battery 1 under the off-line state;

at this time, the second-type electromagnet quick interface iron core coil 6a and the third-type armature 10b are in a standby state;

as shown in fig. 3 and 16, a second armature 6b, a connecting hose G5, a second through solenoid valve 5, a connecting hose G4, a variable volume reservoir 4, a connecting hose G3, a first through solenoid valve 3, a three-way hose G2, a first electromagnet quick interface iron core coil 2a, a third through solenoid valve 9, a hose G9, a third electromagnet quick interface iron core coil 10a, a lithium battery 1 and a lithium ion battery locking sleeve 1h are connected in sequence;

next, connecting and electrifying the No. two armature 6b with the No. two electromagnet quick interface iron core coil 6a, and attracting the No. two armature 6b with the No. two electromagnet quick interface iron core coil 6 a;

connecting and electrifying the three-number armature 10b and the three-number electromagnet quick interface iron core coil 10a, and attracting the three-number armature 10b and the three-number electromagnet quick interface iron core coil 10 a;

next, according to the sixth step, the No. one straight-through electromagnetic valve 3 is in the opening position, the No. two straight-through electromagnetic valve 5 is in the closing position, the No. three straight-through electromagnetic valve 9 is in the opening position, the negative pressure generator 11 is started, and the variable volume liquid storage device 4 and the inner cavity of the lithium battery 1 are pumped to negative pressure;

next, according to the seventh step, the three-way solenoid valve 9 is in the closed position, the one-way solenoid valve 3 is in the closed position, and the two-way solenoid valve 5 is in the open position, the metering pump 7 is opened, the electrolyte in the electrolyte storage tank 8 enters the variable-volume reservoir 4, and when the predetermined amount of liquid is reached, the metering pump 7 is stopped, and the two-way solenoid valve 5 is in the closed position;

next, the through electromagnetic valve 3 of No. one is in an open position, the electrolyte in the variable volume reservoir 4 is sucked into the cavity of the lithium battery 1 by negative pressure in the cavity of the lithium battery 1, and at the moment, the electrolyte in the variable volume reservoir 4 is not completely sucked into the cavity of the lithium battery 1, namely, the quick interface iron core coil 6a of the electromagnet of No. two is powered off, the armature 6b of No. two is released for suction, and the quick interface iron core coil 10a of the electromagnet of No. three is powered off, and the armature 10b of No. three is released for suction;

next, a second armature 6b, a connecting hose G5, a second straight-through electromagnetic valve 5, a connecting hose G4, a variable volume reservoir 4, a connecting hose G3, a first straight-through electromagnetic valve 3, a three-way hose G2, a first electromagnet quick interface iron core coil 2a, a first armature 2a, a three-way electromagnet quick interface iron core coil 9, a hose G9, a three-way electromagnet quick interface iron core coil 10a, a lithium battery 1, a lithium battery locking sleeve 1h and an armature mounting seat 2c are moved out together, so that the electrolyte in the variable volume reservoir 4 is sucked by the negative pressure in the cavity of the lithium battery 1 in an off-line state;

the operation process that the electrolyte in the variable volume reservoir 4 is sucked by the negative pressure in the cavity of the lithium battery 1 in an off-line state is completed, so that the working efficiency of the metering pump 7 and the negative pressure generator 11 can be improved.

Claims

1. A negative-pressure liquid injection system of a lithium ion battery comprises a first electromagnet quick interface iron core coil (2a), a first armature (2b), a first through electromagnetic valve (3), a variable volume liquid storage device (4), a second through electromagnetic valve (5), a second electromagnet quick interface iron core coil (6a), a second armature (6b), a metering pump (7), an electrolyte storage tank (8), a third through electromagnetic valve (9), a third electromagnet quick interface iron core coil (10a), a third armature (10b) and a negative pressure generator (11); the quick connector iron core coil is characterized in that the circle center of the quick connector iron core coil (2a) of the electromagnet No. one is provided with a three-way hose hard end (G2d) of a three-way hose (G2);

the armature No. one (2b) is installed at the top end of the armature installation seat (2c) in an embedded mode, and the circle centers of the armature No. one (2b) and the armature installation seat (2c) are provided with end socket seats (2 d);

an end sealing ring (2e) is arranged at the tangent position of the hard end (G2d) of the three-way hose and the end sleeve seat (2 d);

an end face sealing ring (2f) is arranged in the center of the bottom end face of the armature mounting seat (2 c);

the center of the double electromagnet quick interface iron core coil (6a) is provided with a hose rigid end (G6d) connected with a hose (G6);

the No. two armature (6b) is embedded and installed at the top end of the armature installation seat (6c), and end sleeves (6d) are installed at the circle centers of the No. two armature (6b) and the armature installation seat (2 c);

a clamping sealing ring (6e) is arranged at the tangent position of the rigid end head (G6d) of the hose and the end head sleeve (6 d);

the end head sleeve (6d) is an extension section of a connecting hose (G5);

the circle center of the three-number electromagnet quick interface iron core coil (10a) is provided with a rigid end (G9d) connected with a hose (G9);

the three-armature (10b) is embedded at the top end of the armature fixed seat (10c), and the centers of the three-armature (10b) and the armature mounting seat (2c) are provided with a rigid end cap (10 d);

a clamping sealing ring (10e) is arranged at the tangent position of the rigid end head (G9d) and the rigid end head sleeve (10 d);

an end face sealing ring (11f) is arranged in the center of the bottom end face of the armature fixed seat (10 c);

the variable volume liquid storage device (4) comprises a connecting hose (G3), a connecting hose (G4) and a variable volume liquid storage device (4);

the variable volume liquid storage device (4) is of a sealing bag structure and is made of soft PVC resin materials;

the metering pump (7) adopts one of a plunger type controllable flow metering liquid injection pump and a rotary valve type controllable flow metering liquid injection pump;

the negative pressure generator (11) comprises an air suction pump (11a), a rack (11b), an electric cylinder (11g), a driving motor (11m), a piston pull rod (11c), a connecting lock sleeve (11d) and an electric cylinder telescopic rod (11 e);

the air pump (11a) is arranged above the rack (11b), the electric cylinder (11g) is arranged below the rack (11b), and a piston pull rod (11c) of the air pump (11a) is connected with a lock sleeve (11 d);

the connecting lock sleeve (11d) is used for coupling the expansion rod (11e) of the electric cylinder with the piston pull rod (11c) of the air suction pump (11 a);

the air pump (11a) comprises a piston pull rod (11c), a flange pump cylinder (11h), an air extraction through hole (11k), an external thread convex end cover (11L), an end cover sealing ring (11j), a sealing sliding ring (11s), an expansion ring (11t), an end cover locking bolt (11n), a flange end cover (11v), a port sealing ring (11i), a piston (11u) and a convex end cover locking bolt (11 p);

the piston pull rod (11c) and the piston (11u) are of a connected structure;

the sealing slip ring (11s) and the expansion ring (11t) are embedded in the radial direction of the piston (11u) and are tangent to the inner diameter of the flange pump cylinder (11h), and the outer diameter of the expansion ring (11t) is tangent to the inner circle of the sealing slip ring (11 s);

the sealing slip ring (11s) is an L-shaped ring and is made of one of polytetrafluoroethylene and polyurethane rubber;

the expansion ring (11t) is an O-shaped ring and is made of one of ethylene propylene diene monomer and fluororubber;

a liquid outlet pipe below the electrolyte storage tank (8) is connected with an inlet of the metering pump (7), and a liquid outlet nozzle of the metering pump (7) is connected with a secondary electromagnet quick interface iron core coil (6a) through a connecting hose (G6);

the rigid hose end (G6d) of the connecting hose (G6) penetrates through the center of the coil (6a) of the secondary electromagnet quick interface iron core;

the radial external thread (2g) of the armature mounting seat (2c) is meshed with the opening edge internal thread (1b) of the battery locking sleeve (1 h);

and the internal thread (10g) of the armature fixed seat (10c) is in a meshing structure with the external thread convex end cover (11L) of the air extracting pump (11 a).