CN113258226A

CN113258226A - Sealed liquid injection device for lithium battery production and implementation method thereof

Info

Publication number: CN113258226A
Application number: CN202110519597.0A
Authority: CN
Inventors: 陈鸿宇
Original assignee: Shenzhen Century Jiayuan Electronic Technology Co ltd
Current assignee: Shenzhen Century Jiayuan Electronic Technology Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-08-13
Anticipated expiration: 2041-05-13
Also published as: CN113258226B

Abstract

The invention discloses a sealed liquid injection device for lithium battery production and an implementation method thereof, wherein a lower piezoelectric push rod penetrates through the top end of an insulation box, a liquid delivery port is formed in the side end of the liquid delivery pipe, an air suction pipe is arranged on the inner side of the liquid delivery pipe, a limiting cylinder is connected on the inner side of the output pipe, a blocking circular plate is welded at the side end of the limiting cylinder, stable liquid delivery is carried out through the liquid delivery port, the condition that the input quantity is insufficient due to bubbles in electrolyte during liquid delivery is avoided, the interior of a battery pack is extracted before and after filling through the air suction pipe and an output pipe, the interior of the battery pack is in a vacuum environment, the condition that air remains and bulges are caused in the interior is avoided, the extruded electrolyte is extracted through the air suction pipe, the electrolyte is prevented from overflowing, the limiting and drainage are carried out through the blocking circular plate, the condition that the extracted electrolyte flows backwards is avoided, and the sealing stability of the filling environment of the electrolyte is ensured, the production efficiency and the quality of the battery are ensured.

Description

Sealed liquid injection device for lithium battery production and implementation method thereof

Technical Field

The invention relates to the technical field of lithium battery manufacturing, in particular to a sealed liquid injection device for lithium battery production and an implementation method thereof.

Background

The lithium battery is a battery using a non-aqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material, and thus, the battery is also called a lithium metal battery, and unlike other batteries, the lithium battery has characteristics of high charge density, long life, high unit cost, and the like, and can generate a voltage of 1.5V to 3.7V depending on a structural design and an electrode material.

But at present when carrying out the electrolyte filling to the lithium cell, electrolyte leads to the condition of the not enough or because the spill that the bubble breakage leads to of electrolyte filling because of the inside production bubble of single filling to appear, does not bleed simultaneously before the filling, has leaded to battery package and panel contact not closely to lead to electrolyte too much to receive extrusion back electrolyte spun condition when sealed and appear, very big influence the production speed of battery and the security of production environment.

Disclosure of Invention

The invention provides a sealed liquid injection device for lithium battery production and an implementation method thereof, which can effectively solve the problems that when the electrolyte is filled in the lithium battery at present, the electrolyte is easy to be insufficiently filled due to the generation of bubbles in single filling or splashed due to the breakage of the bubbles, and the electrolyte is too much due to the fact that a battery pack is not tightly contacted with a battery panel because air is not extracted before filling, so that the electrolyte is sprayed out after being extruded during sealing, and the production speed of the battery and the safety of the production environment are greatly influenced.

In order to achieve the purpose, the invention provides the following technical scheme: a sealed liquid injection device for lithium battery production comprises a support frame, wherein a filling assembly is installed on one side of the support frame, and uniform infusion is performed through a liquid discharge pipe 205 and an infusion port, so that the uniformity of electrolyte entering a battery pack is guaranteed, the condition that bubbles are generated due to single position input is avoided, meanwhile, multiple times of vacuumizing are performed before and after infusion through an air suction pipe, the bubbles are further reduced, the electrolyte is limited through a blocking circular plate during extraction, the electrolyte is prevented from being discharged along the air suction pipe under the driving of air flow, the stability of electrolyte storage is guaranteed, meanwhile, redundant electrolyte in the interior is taken away during air extraction, the condition that the electrolyte overflows is avoided, and the stability and safety of battery production are guaranteed;

a heat-sealing assembly is mounted on one side of the supporting frame, the Contraband-type protection box is pushed by pushing the electric push rod, the battery pack is limited by the Contraband-type protection box, the heat insulation plate and the electric heating drying plate are pushed by the return spring, the electric heating drying plate is directly contacted with the surface of the battery pack, the battery pack is heated and sealed, the top end of the battery pack is limited by the extrusion spring and the pressing limiting plate, the top end is prevented from being cracked, and therefore stability in sealing is guaranteed;

spacing subassembly is installed to support frame one side, supplies gas to spacing gasbag through the air feed pump, and centre gripping spring promotes electric heat fixed plate when the gasbag is propped, makes electric heat fixed plate and battery package laminating, and the cooperation through spacing fixed cover carries on spacingly to the battery package simultaneously, thereby has guaranteed the stability that the battery package supported when the filling, and heats drying to it when the filling, makes the battery package be in under the environment of low humidity, avoids the quality of a large amount of moisture influence battery, thereby has guaranteed the production quality and the efficiency of battery.

The vacuum assembly is arranged on one side of the support frame, air in the support frame is pumped away through the air pump, steam generated by hot drying is pumped away during filling, so that the vacuum link and the dryness of the interior are guaranteed, meanwhile, when air is injected, the air is dried through the drying net cage, the injection of humid air is avoided, the stability of the interior environment is guaranteed again, and therefore workers can maintain the environment conveniently;

preferably, the filling assembly comprises a heat preservation box, a lower piezoelectric push rod, a water storage tank, a battery pack, a liquid discharge pipe, a transfusion port, an air suction pipe, an output pipe, a support spring, a support fixing plate, a liquid inlet pipe, a limiting cylinder, a return spring, a blocking circular plate, a flow limiting pipe, a collection box and a discharge pipe;

the top end of the supporting frame is fixedly provided with an insulation can, the top end of the insulation can is penetrated with a lower piezoelectric push rod, the bottom end of the lower piezoelectric push rod is fixedly connected with a water storage tank, the bottom end of the inner side of the insulation can is provided with a battery pack near the position of the water storage tank, the position of the water storage tank corresponding to the water inlet of the battery pack is penetrated with a liquid discharge pipe, the side end of the liquid discharge pipe is provided with a plurality of liquid conveying ports at equal intervals, the inner side of the liquid discharge pipe is provided with an air suction pipe, the air exhaust end of the air suction pipe is connected with the air inlet end of an output pipe, the two sides of the bottom end of the water storage tank are symmetrically welded with supporting springs, the bottom ends of the supporting springs are connected with supporting and fixing plates in a spot welding manner, the two ends of the water storage, the position, close to the blocking circular plate, of the side end of the output pipe penetrates through a flow limiting pipe, one end, far away from the output pipe, of the flow limiting pipe penetrates through one end of the collecting box, and a discharge pipe penetrates through one end of the collecting box.

Preferably, the middle part of the top end of the supporting and fixing plate is bonded with an anti-collision column, the maximum rotation angle of the limiting cylinder is 90 degrees, the input end of the lower piezoelectric push rod is electrically connected with the output end of the external controller, and the input end of the external controller is electrically connected with the output end of the external power supply.

Preferably, the heat sealing assembly comprises an inlet and an outlet, a fixed mounting box, a pushing electric push rod, an Contraband-type protection box, an adsorption electromagnet, a return spring, a heat insulation plate, an electric heating drying plate, a fixed clamping box, an extrusion spring and a downward pressing limiting plate;

insulation can one end has been seted up and has been imported and exported, the welding of insulation can correspondence exit position department has the fixed mounting box, the one end that the insulation can was kept away from to the fixed mounting box runs through has promoted electric push rod, promotion electric push rod one end and Contraband type protection box one end fixed connection, the inboard joint of Contraband type protection box has the absorption electro-magnet, Contraband type protection box inboard is close to absorption electro-magnet position department welding and has a return spring, the fixed joint of return spring one end has the heat insulating board, return spring's one end is kept away from to the heat insulating board bonds and has the electric heat drying plate, the inboard top welding of Contraband type protection box has fixed joint box, the inboard welding of fixed joint box has extrusion spring, the welding of extrusion spring bottom has the limiting plate that pushes down.

Preferably, Contraband type protection box slidable mounting is inboard in the fixed mounting box, the longitudinal section that pushes down the limiting plate is triangle-shaped, all with external control ware output electric connection with the electric heat baking plate input of propelling movement electric putter, adsorption electromagnet.

Preferably, the limiting assembly comprises an air supply pump, an air supply pipe, a limiting air bag, a fixed clamping plate, a clamping spring, an electric heating fixing plate, a limiting fixing sleeve, a clamping fixing port and a moving port;

the support frame bottom is connected with the air feed pump through the motor cabinet, the air feed pump is given vent to anger the end and is advanced air supply pipe inlet end fixed connection, it runs through and installs in spacing gasbag one end to advance the air supply pipe outlet end the inboard one end of spacing gasbag bonds and has fixed grip block, fixed grip block one end equidistance welds in a plurality of clamping spring, two equal welded mounting in electric heat fixed plate one end of clamping spring one end, the inboard welding that corresponds spacing gasbag position department of insulation can has spacing fixed cover, spacing gasbag and spacing fixed cover bonded connection, spacing fixed cover corresponds battery package position department and has seted up the joint fixed mouthful, spacing fixed cover one end is close to joint fixed mouthful position department and has seted up the removal mouth.

Preferably, the air inlet and supply pipe penetrates through the bottom end of the heat preservation box, the cross street surface of the limiting fixing sleeve is of a square-shaped structure, and the input ends of the air supply pump and the electric heating fixing plate are electrically connected with the output end of the external controller.

Preferably, the vacuum assembly comprises an air pump, a concentration pipe, a drying box, a fixed limit strip, a drying cylinder mould, an extraction pipe and an electric valve;

insulation can top fixed mounting has the aspiration pump, the aspiration pump inlet end is with the fixed connection of the pipe end of giving vent to anger of concentrating, the pipe inlet end of concentrating runs through and installs in drying cabinet one end, the inboard bottom symmetric welding of drying cabinet has fixed spacing, the inboard joint that corresponds fixed spacing position department of drying cabinet has dry cylinder mould, the one end that the pipe was kept away from to the drying cabinet runs through there is the extraction pipe, the extraction pipe inlet end runs through the insulation can, the motorised valve is installed in the equal embedding of output tube, delivery pipe and extraction pipe one end.

Preferably, the drying cylinder mould corresponds fixed spacing position department and has seted up the joint mounting groove, aspiration pump and motorised valve input all with external control ware output electric connection.

According to any one of the implementation methods of the sealed liquid injection device for lithium battery production.

Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use:

1. the filling assembly is arranged, the storage water tank is driven to be pressed down to the position of the battery pack by the lower piezoelectric push rod, and the position of the storage water tank is limited by the supporting spring and the supporting and fixing plate, so that the liquid discharge pipe can be stably inserted into the battery pack and stably transfused by the transfusion port, when electrolyte is input, the liquid flows downwards along the inner wall of the pipeline, the downward pressing impact force of the liquid discharge pipe is dispersed by the transfusion port, the phenomenon that air is pressed down into the battery pack due to the excessively large impact force in a short time is avoided, the phenomenon that the input quantity is insufficient due to bubble accumulation in the electrolyte during transfusion is avoided, the interior of the battery pack is extracted before and after filling by the air suction pipe and the output pipe, the interior of the battery pack is in a vacuum environment, the phenomenon that air is remained to cause swelling in the interior of the battery pack is avoided, when swelling or the electrolyte is excessive due to the external environment, the excessive electrolyte extruded in the battery pack is extracted by the air suction pipe, avoid electrolyte to spill over to carry out spacing and drainage through blockking the plectane, avoid the electrolyte condition against the current after the extraction to appear, thereby guaranteed the sealed stability of the filling environment of electrolyte, and avoid appearing the condition that spills over or swell behind the filling, guaranteed the production efficiency and the quality of battery.

2. Be provided with the heat-seal subassembly, it slides along the fixed mounting box to drive Contraband type protection box through propelling electric push rod, thereby release Contraband type protection box battery package position department, limit battery package both ends, limit pushing down the limiting plate through extrusion spring, it restricts battery both ends to have return spring to promote heat insulating board and electric heat to dry by the fire the board simultaneously, and carry out the heat-seal to it in the restriction, thereby avoid appearing because of the battery package skew condition appearance deviation of battery package position that leads to when the heat-seal, the size of battery package through the extrusion restriction simultaneously, avoid appearing the vacancy position, thereby avoid inside air of piling up, further assurance the quality of battery package.

3. Be provided with spacing subassembly, circulate the air feed through the air feed pump, gaseous entering into spacing gasbag, prop up spacing gasbag, and carry out the direction restriction under the dual function of spacing fixed cover and fixed grip block, there is centre gripping spring to promote the electric heat fixed plate when propping up, carry out the centre gripping to the battery package, make can be stable when the filling support of battery avoid the offset, and heat it simultaneously, the drying of internal environment has been guaranteed, avoid the quality of moist influence battery.

4. Be provided with vacuum assembly, bleed in to the insulation can through the aspiration pump for in the insulation can enters into the drying cabinet, the air carries out the drying through dry cylinder mould, has guaranteed that the storage carries out gaseous drying in the aspiration pump, thereby reuse when being convenient for follow-up pressure release through carrying out vacuum treatment in to the insulation can, avoids inside gas to enter into in the battery package to produce the influence to follow-up filling, carries out the vacuum extraction in the battery package simultaneously, has guaranteed that the laminating of battery package is inseparable.

To sum up, mutually support through filling subassembly and spacing subassembly, make and carry out the stable support when filling, avoid the condition of battery package offset to appear when filling, and heat in real time the battery package, avoid appearing because of the too big condition that leads to electrolyte anomaly of humidity, mutually support through filling subassembly and vacuum subassembly, make can effectual reduction air in the battery package around filling, avoid appearing the condition of swell, will mutually support through heat-seal subassembly and filling group, make the interior external environment of assurance battery that can step forward when the heat-seal, avoid appearing sealing the condition of skew or swell and appear, will mutually support through a plurality of groups, the production efficiency and the production quality of battery have been guaranteed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic structural view of the fill assembly of the present invention;

fig. 3 is a schematic view of an installation structure of the battery pack of the present invention;

FIG. 4 is a schematic view showing an installation structure of the water storage tank of the present invention;

FIG. 5 is a schematic view of the construction of the heat seal assembly of the present invention;

FIG. 6 is a schematic view of the installation structure of the pressing spring of the present invention;

FIG. 7 is a schematic view of the installation structure of the adsorption electromagnet of the present invention;

FIG. 8 is a schematic structural view of a stop assembly of the present invention;

FIG. 9 is a schematic view of the mounting structure of the restraining airbag of the present invention;

FIG. 10 is a schematic structural view of a vacuum assembly of the present invention;

fig. 11 is a schematic view of the mounting arrangement of the drying cylinder mould of the invention;

reference numbers in the figures: 1. a support frame;

2. a fill assembly; 201. a heat preservation box; 202. a lower piezoelectric push rod; 203. a water storage tank; 204. a battery pack; 205. a liquid discharge pipe; 206. an infusion port; 207. an air intake duct; 208. an output pipe; 209. a support spring; 210. a support fixing plate; 211. a liquid inlet pipe; 212. a limiting cylinder; 213. a return spring; 214. a blocking circular plate; 215. a current limiting pipe; 216. a collection box; 217. a discharge pipe;

3. a heat seal assembly; 301. an inlet and an outlet; 302. fixing the mounting box; 303. pushing the electric push rod; 304. model Contraband protective boxes; 305. an adsorption electromagnet; 306. a return spring; 307. a heat insulation plate; 308. an electric heating drying plate; 309. fixing the clamping box; 310. a compression spring; 311. pressing the limiting plate;

4. a limiting component; 401. an air supply pump; 402. a gas supply pipe; 403. a limiting air bag; 404. fixing the clamping plate; 405. a clamping spring; 406. an electric heating fixing plate; 407. a limiting fixing sleeve; 408. clamping the fixing port; 409. moving the port;

5. a vacuum assembly; 501. an air pump; 502. a concentration pipe; 503. a drying oven; 504. fixing a limiting strip; 505. drying the cylinder mould; 506. an extraction pipe; 507. an electric valve.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example (b): as shown in fig. 1-11, the invention provides a technical solution, a sealing liquid injection device for lithium battery production, comprising a support frame 1, a filling component 2 is installed on one side of the support frame 1, uniform liquid injection is performed through a liquid discharge pipe 205 and an injection port 206, thereby ensuring the uniformity of the electrolyte entering the battery pack 204, avoiding the occurrence of bubble generation caused by single position input, meanwhile, the air suction pipe 207 is used for vacuumizing for a plurality of times before and after transfusion, so that the generation of bubbles is further reduced, and the electrolyte is limited by the blocking circular plate 214 during extraction, so that the electrolyte is prevented from being discharged along the air suction pipe 207 under the driving of air flow, the stability of the electrolyte storage is ensured, meanwhile, redundant electrolyte in the battery is taken away when air is extracted, so that the condition of electrolyte overflow is avoided, and the stability and safety of battery production are ensured;

a heat sealing assembly 3 is installed on one side of the support frame 1, the Contraband-type protection box 304 is pushed by pushing the electric push rod 303, the battery pack 204 is limited by the Contraband-type protection box 304, the heat insulation plate 307 and the electric heating drying plate 308 are pushed by the return spring 306, the electric heating drying plate 308 is in direct contact with the surface of the battery pack 204, so that the battery pack 204 is heated and sealed, the top end of the battery pack 204 is limited by the extrusion spring 310 and the lower pressing limiting plate 311, the top end is prevented from being cracked, and the stability in sealing is ensured;

spacing subassembly 4 is installed to support frame 1 one side, carry out the air feed to spacing gasbag 403 through air feed pump 401, grip spring 405 promotes electric heat fixed plate 406 when spacing gasbag 403 is propped up, make electric heat fixed plate 406 laminate with battery package 204, the cooperation through spacing fixed cover 407 is spacing to battery package 204 simultaneously, thereby guaranteed the stability that battery package 204 supported when the filling, and heat drying it when the filling, make battery package 204 be in under the environment of low humidity, avoid the quality of a large amount of moisture influence battery, thereby the production quality and the efficiency of battery have been guaranteed.

A vacuum component 5 is arranged on one side of the support frame 1, air in the support frame is pumped away through an air pump 501, steam generated by hot drying is pumped away during filling, so that the vacuum link and the dryness of the interior are ensured, and meanwhile, when air is injected, the air is dried through a drying cylinder mould 505, so that the injection of moist air is avoided, the stability of the interior environment is ensured again, and the environment is convenient for workers to maintain;

the filling assembly 2 comprises an insulation box 201, a lower piezoelectric push rod 202, a water storage tank 203, a battery pack 204, a liquid discharge pipe 205, an infusion port 206, an air suction pipe 207, an output pipe 208, a support spring 209, a support fixing plate 210, an liquid inlet pipe 211, a limiting cylinder 212, a return spring 213, a blocking circular plate 214, a limiting pipe 215, a collection box 216 and a discharge pipe 217;

the top end of the support frame 1 is fixedly provided with an insulation box 201, the top end of the insulation box 201 is penetrated with a lower piezoelectric push rod 202, the bottom end of the lower piezoelectric push rod 202 is fixedly connected with a water storage box 203, the bottom end of the inner side of the insulation box 201 is close to the position of the water storage box 203 and is provided with a battery pack 204, the position of the water storage box 203 corresponding to the water inlet of the battery pack 204 is penetrated with a liquid discharge pipe 205, the side end of the liquid discharge pipe 205 is equidistantly provided with a plurality of liquid transfusion ports 206, the inner side of the liquid discharge pipe 205 is provided with an air suction pipe 207, the air discharge end of the air suction pipe 207 is connected with the air inlet end of an output pipe 208, two sides of the bottom end of the water storage box 203 are symmetrically welded with supporting springs 209, the bottom end of the supporting springs 209 is connected with a supporting and fixing plate 210 in a spot welding manner, the middle part of the top end of the supporting and fixing plate 210 is adhered with an anti-collision column which is placed to impact the bottom end of the water storage box 203 when descending, two ends of the water storage box 203 are symmetrically penetrated with liquid inlet pipes 211, the inner side of the output pipe 208 is rotatably connected with a limiting cylinder 212, the maximum rotation angle of 90 degrees, the speed of business turn over gas and sealed effect have been guaranteed, the inboard one end welding of a spacing section of thick bamboo 212 has reset spring 213, reset spring 213 one end joint is installed in output tube 208 one end, spacing section of thick bamboo 212 side symmetrical welding has and blocks plectane 214, output tube 208 side is close to and blocks plectane 214 position department and run through current-limiting tube 215, the one end that current-limiting tube 215 kept away from output tube 208 runs through and installs in collecting box 216 one end, it has delivery pipe 217 to collect box 216 one end, lower piezoelectric push rod 202 input and external controller output electric connection, external controller input and external power source output electric connection.

The heat sealing assembly 3 comprises an inlet and outlet 301, a fixed mounting box 302, a pushing electric push rod 303, an Contraband type protection box 304, an adsorption electromagnet 305, a return spring 306, a heat insulation plate 307, an electric heating drying plate 308, a fixed clamping box 309, an extrusion spring 310 and a downward pressing limiting plate 311;

an inlet and an outlet 301 are formed at one end of an incubator 201, a fixed mounting box 302 is welded at a position of the incubator 201 corresponding to the inlet and the outlet 301, a push electric push rod 303 penetrates through one end of the fixed mounting box 302 away from the incubator 201, one end of the push electric push rod 303 is fixedly connected with one end of an Contraband type protection box 304, the Contraband type protection box 304 is slidably mounted at the inner side of the fixed mounting box 302 so as to be convenient for limiting and fixing, an adsorption electromagnet 305 is clamped at the inner side of a Contraband type protection box 304, a return spring 306 is welded at a position of the inner side of the Contraband type protection box 304 close to the adsorption electromagnet 305, a heat insulation plate 307 is fixedly clamped at one end of the return spring 306, an electric heating drying plate 308 is bonded at one end of the heat insulation plate 307 away from the return spring 306, a fixed clamping box 309 is welded at the top end of the inner side of the Contraband type protection box 304, an extrusion spring 310 is welded at the inner side of the fixed clamping box 309, a lower pressure limiting plate 311 is welded at the bottom end of the extrusion spring 310, and the longitudinal section limiting plate 311 is triangular, the effect of pressing down and fixing is ensured, and the input ends of the electric push rod 303, the adsorption electromagnet 305 and the electric heating drying plate 308 are all electrically connected with the output end of an external controller.

The limiting component 4 comprises an air supply pump 401, an air supply pipe 402, a limiting air bag 403, a fixed clamping plate 404, a clamping spring 405, an electric heating fixing plate 406, a limiting fixing sleeve 407, a clamping fixing port 408 and a moving port 409;

the bottom end of the support frame 1 is connected with an air supply pump 401 through a motor base, the air outlet end of the air supply pump 401 is fixedly connected with the air inlet end of an air inlet and supply pipe 402, the air inlet and supply pipe 402 penetrates through the bottom end of the heat preservation box 201 and is convenient to be fixedly installed, the air outlet end of the air inlet and supply pipe 402 penetrates through and is installed at one end of a limit air bag 403, one end of the limit air bag 403 is bonded with a fixed clamping plate 404, one end of the fixed clamping plate 404 is equidistantly welded on a plurality of clamping springs 405, one end of each clamping spring 405 is welded at one end of an electric heating fixing plate 406, a limit fixing sleeve 407 is welded at the position, corresponding to the limit air bag 403, at the inner side of the heat preservation box 201, the limit air bag 403 is bonded with a limit fixing sleeve 407, the cross section of the limit fixing sleeve 407 is of a reverse shape, the stability of clamping is ensured, a clamping fixing port 408 is arranged at the position, corresponding to the battery pack 204, a moving port 409 is arranged at one end of the limit fixing sleeve 407, which is close to the clamping fixing port 408, the input ends of the air supply pump 401 and the electric heating fixing plate 406 are electrically connected with the output end of an external controller.

The vacuum assembly 5 comprises a suction pump 501, a concentration pipe 502, a drying box 503, a fixed limit strip 504, a drying cylinder mould 505, an extraction pipe 506 and an electric valve 507;

insulation can 201 top fixed mounting has aspiration pump 501, aspiration pump 501 inlet end and the fixed connection of the pipe 502 end of giving vent to anger of concentrating, the pipe 502 inlet end of concentrating runs through and installs in drying cabinet 503 one end, the inboard bottom symmetrical welding of drying cabinet 503 has fixed spacing 504, the inboard fixed spacing 504 position department joint that corresponds of drying cabinet 503 has dry cylinder mould 505, the one end that the pipe 502 was kept away from concentrating to drying cabinet 503 runs through there is extraction pipe 506, dry cylinder mould 505 corresponds fixed spacing 504 position department and has seted up the joint mounting groove, be convenient for carry out the joint fixed, extraction pipe 506 inlet end runs through insulation can 201, output tube 208, equal embedding of delivery pipe 217 and extraction pipe 506 one end is installed and is held solenoid valve 507, aspiration pump 501 and solenoid valve 507 input all with external control ware output electric connection.

According to an implementation method of the sealed liquid injection device for lithium battery production.

The working principle and the using process of the invention are as follows: before the electrolyte of the battery needs to be filled, the battery pack 204 is clamped to the inner side of the limiting fixing sleeve 407 along the clamping fixing port 408, the air supply pump 401 is started, the air supply pipe 402 is supplied with air by the air supply pump 401, the air enters the limiting air bag 403 through the air supply pipe 402, the limiting air bag 403 is supported after the air enters the limiting air bag 403, and the supporting position of the limit airbag 403 is fixed by the blocking action of the fixing clamping plate 404 and the limit fixing sleeve 407, so that one side of the limit airbag 403 close to the battery pack 204 is supported, meanwhile, the clamping spring 405 is reset to drive the electric heating fixing plate 406 to gradually approach the battery pack 204 and tightly attach to the battery pack 204 under the action of continuous air supply, the battery pack 204 is clamped and pressed, so that the components inside the battery pack 204 and the outer skin of the battery pack 204 are tightly attached, meanwhile, the battery pack 204 is fixed, so that the position deviation caused by electrolyte filling during filling is avoided;

starting the air extracting pump 501 and the electric valve 507, wherein the air extracting pump 501 extracts air from the heat insulation box 201, air in the heat insulation box 201 enters the drying box 503 through the air extracting pipe 506, the air is dried through the drying net cage 505, the dried air enters the air extracting pump 501 through the concentration pipe 502 and is finally stored in the air extracting pump 501 for standby, the heat insulation box 201 is subjected to vacuum treatment, and the condition that the internal air enters the battery pack 204 to affect subsequent filling is avoided;

after the preparation is completed, the lower piezoelectric push rod 202 is started, the water storage tank 203 is driven by the lower piezoelectric push rod 202 to be pressed downwards, the support fixing plate 210 is placed at the side end of the battery pack 204 and is supported by the support spring 209 in an auxiliary manner, the electric valve 507 at the position of the output pipe 208 is opened, the vacuum pumping is performed on the battery pack 204 by the air pump 501, after the pumping is completed, the electric valve 507 is closed, the water is supplied to the water storage tank 203 through the liquid inlet pipe 211, the electrolyte enters the liquid discharge pipe 205 through the water storage tank 203 and is finally uniformly discharged through the liquid discharge pipe 205 and the infusion port 206, the electrolyte flows downwards along the inner wall of the liquid discharge pipe 205 when passing through the liquid discharge pipe 205 and is discharged when being dispersed through the infusion port 206, so that the impact force is reduced, the downward flowing speed of the electrolyte can be effectively controlled during filling, and the condition that bubbles or the electrolyte is splashed due to the fact that the downward flowing speed is too fast is avoided, thereby avoiding the occurrence of bubbles caused by uneven liquid feeding, after filling, the electric valve 507 is started again, air suction is carried out again through the air suction pipe 207, the push electric push rod 303 and the lower piezoelectric push rod 202 are simultaneously started, the lower piezoelectric push rod 202 drives the water storage tank 203 to rise, the push electric push rod 303 drives the Contraband type protection box 304 to slide along the fixed installation box 302 and finally slide to the position of the inlet and outlet 301, the liquid enters the limit fixing sleeve 407 through the moving port 409, reverse air suction is carried out by the air supply pump 401, so that the limit air bag 403 is gradually compressed and separated, the Contraband type protection box 304 is attached to the battery pack 204, the adsorption electromagnet 305 is closed, the return spring 306 pushes the heat insulation plate 307 and the electric heating drying plate 308, so that the electric heating drying plate 308 is attached to two ends of the battery pack 204, the battery pack 204 is pressed again, when swelling or filtering of the electrolyte occurs, redundant electrolyte and air is extracted through the air suction pipe 207, electrolyte enters the output pipe 208 along the air suction pipe 207, after extraction is completed, the electric valve 507 is closed, after adsorption force disappears, the return spring 213 drives the limiting cylinder 212 to rotate, so as to drive the blocking circular plate 214 to reset, the blocking circular plate 214 is used for limiting, the electrolyte falls onto the surface of the blocking circular plate 214 after losing the limiting force, the electrolyte flows into the collection box 216 through the flow limiting pipe 215 and is discharged through the discharge pipe 217 after being accumulated to a certain amount, so as to control the amount of the internal electrolyte, the situation that the electrolyte overflows due to excessive electrolyte during extrusion is avoided, the piezoelectric push rod 202 is started again to drive the water storage box 203 to reset, the extrusion spring 310 drives the pressing limiting plate 311 to slide along the fixed clamping box 309, so as to limit the top end of the battery pack 204, the electric heating plate 308 is started, and the electric heating drying plate 308 is used for hot drying and extrusion on the two ends of the battery, therefore, the sealing is carried out, the limitation is continuously carried out while the sealing, the abnormal condition of the sealing port caused by the deviation of the sealing position is avoided, and the sealing effect is ensured.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lithium cell production is with sealed priming device, includes support frame (1), its characterized in that: a filling assembly (2) is mounted on one side of the support frame (1), uniform transfusion is carried out through a liquid discharge pipe (205) and a transfusion port (206), multiple times of vacuumizing are carried out before and after transfusion through an air suction pipe (207), and electrolyte is limited through a blocking circular plate (214);

a heat-sealing assembly (3) is mounted on one side of the support frame (1), an Contraband-type protective box (304) is pushed by a push electric push rod (303), the battery pack (204) is limited by a Contraband-type protective box (304), a heat insulation plate (307) and an electric heating drying plate (308) are pushed by a return spring (306), the electric heating drying plate (308) is directly contacted with the surface of the battery pack (204), and the top end of the battery pack (204) is limited by an extrusion spring (310) and a lower pressure limiting plate (311);

a limiting assembly (4) is installed on one side of the support frame (1), a limiting air bag (403) is supplied with air through an air supply pump (401), and when the air bag (403) is supported, the clamping spring (405) pushes the electric heating fixing plate (406) to enable the electric heating fixing plate (406) to be attached to the battery pack (204), and meanwhile, the battery pack (204) is limited through the matching of a limiting fixing sleeve (407);

vacuum module (5) are installed to support frame (1) one side, take away the air of inside through aspiration pump (501), carry out the drying to the air through dry cylinder mould (505).

2. The sealed liquid injection device for the lithium battery production according to claim 1, wherein the filling assembly (2) comprises an insulation box (201), a lower pressing push rod (202), a water storage tank (203), a battery pack (204), a liquid discharge pipe (205), a liquid delivery port (206), a gas suction pipe (207), an output pipe (208), a support spring (209), a support fixing plate (210), a liquid inlet pipe (211), a limiting cylinder (212), a return spring (213), a blocking circular plate (214), a limiting pipe (215), a collection box (216) and a discharge pipe (217);

the top end of the support frame (1) is fixedly provided with an insulation box (201), the top end of the insulation box (201) penetrates through a lower piezoelectric push rod (202), the bottom end of the lower piezoelectric push rod (202) is fixedly connected with a water storage box (203), a battery pack (204) is placed at the position, close to the water storage box (203), of the bottom end of the inner side of the insulation box (201), a liquid discharge pipe (205) penetrates through the position, corresponding to the water inlet of the battery pack (204), of the water storage box (203), a plurality of infusion ports (206) are formed in the side end of the liquid discharge pipe (205) at equal intervals, an air suction pipe (207) is placed on the inner side of the liquid discharge pipe (205), the air exhaust end of the air suction pipe (207) is connected with the air inlet end of an output pipe (208), support springs (209) are symmetrically welded on the two sides of the bottom end of the water storage box (203), the bottom ends of the support springs (209) are connected with a support fixing plate (210), and liquid inlet pipes (211) are symmetrically penetrated through the two ends of the water storage box (203), output tube (208) inboard is rotated and is connected with spacing section of thick bamboo (212), the inboard one end welding of spacing section of thick bamboo (212) has reset spring (213), reset spring (213) one end joint is installed in output tube (208) one end, spacing section of thick bamboo (212) side symmetrical weld has blocks plectane (214), output tube (208) side is close to and blocks plectane (214) position department and runs through current-limiting tube (215), the one end that output tube (208) were kept away from in current-limiting tube (215) runs through and installs in collection box (216) one end, it has delivery pipe (217) to run through to collect box (216) one end.

3. The sealed liquid injection device for lithium battery production as claimed in claim 2, wherein an anti-collision post is bonded to the middle of the top end of the supporting and fixing plate (210), the maximum rotation angle of the limiting cylinder (212) is 90 degrees, the input end of the lower piezoelectric push rod (202) is electrically connected to the output end of an external controller, and the input end of the external controller is electrically connected to the output end of an external power supply.

4. The sealing liquid injection device for the lithium battery production according to claim 1, wherein the heat sealing assembly (3) comprises an inlet and outlet (301), a fixed mounting box (302), a pushing electric push rod (303), an Contraband-type protection box (304), an adsorption electromagnet (305), a return spring (306), a heat insulation plate (307), an electric heating drying plate (308), a fixed clamping box (309), an extrusion spring (310) and a downward pressing limiting plate (311);

import and export (301) have been seted up to insulation can (201) one end, insulation can (201) correspond import and export (301) position department welding has fixed mounting box (302), the one end that insulation can (201) were kept away from to fixed mounting box (302) runs through and has impeld electric push rod (303), impel electric push rod (303) one end and Contraband type protection box (304) one end fixed connection, Contraband type protection box (304) inboard joint has adsorption electromagnet (305), Contraband type protection box (304) inboard is close to adsorption electromagnet (305) position department welding has return spring (306), return spring (306) one end fixed joint has heat insulating board (307), return spring (306) is kept away from in one end bonding has electric heat drying plate (308), Contraband type protection box (304) inboard top welding has fixed joint box (309), fixed joint box (309) inboard welding has extrusion spring (310), the bottom end of the extrusion spring (310) is welded with a pressing limiting plate (311).

5. The sealed liquid injection device for lithium battery production according to claim 4, wherein the Contraband-type protection box (304) is slidably mounted inside the fixed mounting box (302), the longitudinal section of the lower pressing limiting plate (311) is triangular, and the input ends of the push electric push rod (303), the adsorption electromagnet (305) and the electric heating drying plate (308) are electrically connected with the output end of an external controller.

6. The sealed liquid injection device for the lithium battery production as claimed in claim 1, wherein the limiting component (4) comprises an air supply pump (401), an air supply pipe (402), a limiting air bag (403), a fixed clamping plate (404), a clamping spring (405), an electric heating fixing plate (406), a limiting fixing sleeve (407), a clamping fixing port (408) and a moving port (409);

the bottom end of the support frame (1) is connected with an air supply pump (401) through a motor base, the air outlet end of the air supply pump (401) is fixedly connected with the air inlet end of an air inlet and supply pipe (402), the air outlet end of the air inlet and supply pipe (402) is arranged at one end of a limit air bag (403) in a penetrating way, one end of the inner side of the limit air bag (403) is adhered with a fixed clamping plate (404), one end of the fixed clamping plate (404) is equidistantly welded on a plurality of clamping springs (405), one end of each of the two clamping springs (405) is welded and installed at one end of the electric heating fixed plate (406), a limit fixing sleeve (407) is welded at the position corresponding to the limit air bag (403) at the inner side of the heat preservation box (201), the limit airbag (403) is connected with a limit fixing sleeve (407) in an adhesive way, a clamping fixing port (408) is arranged at the position of the limit fixing sleeve (407) corresponding to the battery pack (204), one end of the limiting fixing sleeve (407) is provided with a moving port (409) at a position close to the clamping fixing port (408).

7. The sealed liquid injection device for lithium battery production as claimed in claim 6, wherein the air inlet and supply pipe (402) penetrates through the bottom end of the heat insulation box (201), the cross section of the limiting fixing sleeve (407) is of a circular shape, and the input ends of the air supply pump (401) and the electric heating fixing plate (406) are electrically connected with the output end of an external controller.

8. The sealed liquid injection device for the lithium battery production according to claim 1, wherein the vacuum assembly (5) comprises an air pump (501), a concentration pipe (502), a drying box (503), a fixing and limiting strip (504), a drying cylinder mould (505), an extraction pipe (506) and an electric valve (507);

insulation can (201) top fixed mounting has aspiration pump (501), aspiration pump (501) inlet end and the fixed connection of concentrating tub (502) outlet end, it runs through and installs in drying cabinet (503) one end to concentrate tub (502) inlet end, the inboard bottom symmetric welding of drying cabinet (503) has fixed spacing (504), drying cabinet (503) inboard corresponds fixed spacing (504) position department joint has dry cylinder mould (505), the one end that concentrating tub (502) was kept away from in drying cabinet (503) runs through extraction pipe (506), extraction pipe (506) inlet end runs through insulation can (201), output tube (208), delivery pipe (217) and extraction pipe (506) one end all imbeds and installs motorised valve (507).

9. The sealed liquid injection device for lithium battery production as claimed in claim 8, wherein a clamping installation groove is formed at a position of the drying cylinder mould (505) corresponding to the fixed limit strip (504), and input ends of the air suction pump (501) and the electric valve (507) are electrically connected with an output end of an external controller.

10. A method for implementing the sealed liquid injection device for the production of the lithium battery, which is characterized by comprising the step of implementing the sealed liquid injection device for the production of the lithium battery according to any one of claims 1 to 9.