CN114361743B - Liquid injection sealing equipment for lithium battery and application method of liquid injection sealing equipment - Google Patents
Liquid injection sealing equipment for lithium battery and application method of liquid injection sealing equipment Download PDFInfo
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- CN114361743B CN114361743B CN202210020726.6A CN202210020726A CN114361743B CN 114361743 B CN114361743 B CN 114361743B CN 202210020726 A CN202210020726 A CN 202210020726A CN 114361743 B CN114361743 B CN 114361743B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The application relates to a liquid injection sealing device of a lithium battery, which comprises a primary sealing device and a secondary sealing device; the primary sealing device comprises a first machine body and a first rotary table, wherein a placing frame is arranged on the first rotary table, a liquid injection frame with an opening claw piece is arranged on the first machine body in a lifting mode, a liquid injection pipe is arranged on the opening claw piece, the liquid injection pipe is connected with a liquid injection pump, and an opening and closing assembly is connected to the liquid injection frame; the first machine body is provided with a connecting frame, the connecting frame is provided with a static shaping pressure head and a static shaping cylinder, the first machine body is provided with a clamping plate in a sliding manner, the first machine body is provided with a driving cylinder connected with the clamping plate, and the clamping plate is provided with an electric heating wire; the secondary sealing device comprises a second machine body and a second rotary table, a jig box is arranged on the second rotary table, a pressing plate cylinder and a sealing pressing plate are arranged on the second machine body, a puncture needle is arranged on the sealing pressing plate, a suction hole connected with a suction pump is formed in the puncture needle, and an electric heating wire is arranged on the sealing pressing plate; the first machine body and the second machine body are internally provided with rotating motors. The application has the effect of improving the working efficiency.
Description
Technical Field
The application relates to the technical field of lithium battery manufacturing equipment, in particular to liquid injection sealing equipment for a lithium battery and a use method thereof.
Background
With the progress of the battery industry, the production and application of lithium batteries have been rapidly developed. Because lithium batteries have the advantages of high energy density, high average use voltage, flat use voltage, high capacity, long service life, environmental protection and the like, gradually replace lead-acid batteries and nickel-cadmium batteries, and have been widely applied to the fields of electric automobiles, mobile phones, notebook computers, household appliances and the like in recent years, lithium batteries have become main roles in battery markets.
The production process of the lithium battery mainly comprises the steps of preparing electrode slurry, preparing positive and negative electrode cores of the battery by using a current collector with the electrode slurry, filling the electrode cores into an aluminum plastic film which is punched with pits to form a soft package battery without filling liquid, filling a specified amount of electrolyte into the soft package battery, pumping out gas in the battery and completing sealing, and finally testing the battery.
Among them, the liquid injection and sealing process of lithium batteries has been a difficult problem. The traditional mode is usually adopted to separate the liquid injection from the sealing, after the liquid injection is completed, the battery is transported to the sealing machine for sealing by the liquid injection machine, two steps of working procedures are needed, therefore, a plurality of workers are matched for transporting, the labor intensity is high, and the production efficiency of the battery is low.
Disclosure of Invention
The application aims to provide liquid injection and sealing equipment for a lithium battery, which has the characteristics of reducing the number of transferring staff in a liquid injection link and a sealing link of the battery in the battery production process, reducing the working intensity and improving the battery production efficiency.
The first object of the present application is achieved by the following technical solutions:
the liquid injection sealing equipment for the lithium battery is characterized by comprising a primary sealing device and a secondary sealing device;
the primary sealing device comprises a first machine body and a first rotary table which is rotatably arranged on the first machine body, a placing frame is arranged on the first rotary table, a liquid injection frame is arranged on the first machine body in a lifting mode, an opening claw piece for opening a battery bag is arranged at the bottom of the liquid injection frame, the opening claw piece is inserted into the battery bag, a liquid injection pipe is arranged in the opening claw piece, the liquid injection pipe is connected with a liquid injection pump, and an opening and closing assembly for controlling the opening claw piece to open or close is connected to the liquid injection frame;
the battery pack is characterized in that a connecting frame is arranged on the first machine body, a static shaping pressure head is arranged at the bottom of the connecting frame, a static shaping cylinder is arranged at the top of the connecting frame, a piston rod of the static shaping cylinder is fixedly connected with the static shaping pressure head, and the static shaping pressure head is abutted to the inner wall of the battery pack;
the first machine body is also provided with a clamping plate which is connected with the first machine body in a sliding way, the clamping plate is clamped at the edge of the battery bag, the first machine body is also provided with a driving cylinder for driving the clamping plate to move, one side of the clamping plate for clamping the battery bag is provided with an electric heating wire, and the electric heating wire is abutted to the opening of the battery bag;
the secondary sealing device comprises a second machine body and a second rotary table which is rotatably arranged in the second machine body, a jig box for clamping the battery bag is arranged on the second rotary table, a pressing plate cylinder is arranged on the second machine body, a sealing pressing plate for secondarily sealing the battery bag is arranged on a piston rod of the pressing plate cylinder, a puncture needle is arranged on one side, facing the battery bag, of the sealing pressing plate, an air suction hole is formed in the puncture needle, the air suction hole of the puncture needle is connected with an air suction pump, and an electric heating wire is arranged on one side, clamping the battery bag, of the sealing pressing plate;
the first machine body and the second machine body are internally provided with rotating motors for driving the first rotary table and the second rotary table to rotate.
Through adopting above-mentioned technical scheme, when annotating liquid and sealing the battery bag, place the battery bag on the rack, utilize the rotation of first carousel, drive rack and battery bag and shift to the below of annotating the liquid frame, will annotate the top that liquid frame and open jaw piece descend to the rack for open jaw piece pegged graft in the battery bag, drive open jaw piece and open the battery bag opening through opening and close the subassembly, utilize annotate the liquid pipe and annotate the liquid. After the liquid injection is finished, transferring the battery bag to the lower part of the connecting frame, carrying out a plurality of static shaping on electrolyte in the battery bag through a static shaping pressure head, and simultaneously, standing the battery bag so as to enable the electrolyte and the bare cell to be fully fused and then transferred through a first rotating disc. Starting a driving cylinder to enable the clamping plate to clamp the edge of the battery bag, and melting the aluminum-plastic film through the electric heating wire, so that one-time sealing is completed, and a space is reserved between the one-time sealing position and the battery core. And puncturing the aluminum plastic film by utilizing a puncture needle in the secondary sealing device, sucking out air in the battery bag, starting an electric heating wire on a sealing pressing plate to seal the battery bag for the second time, and attaching the secondary sealing position to the side edge of the battery core to finally finish sealing work.
The present application may be further configured in a preferred example to: the utility model discloses a battery rack, including rack, dislocation clamp, slide hole, dislocation clamp and battery bag, the standing groove has vertically been seted up on the rack, the top of standing groove is provided with dislocation clamp, dislocation clamp has seted up dislocation hole, dislocation hole's one end is the osculum setting, dislocation hole's osculum end and battery bag's side butt, the slide hole has been seted up on the rack, the slide hole is rectangular form setting, just the slide hole is followed the length direction of rack is seted up, dislocation clamp's lateral wall peg graft in the slide hole, just dislocation clamp is followed the slide hole slides.
Through adopting above-mentioned technical scheme, place the battery bag in the standing groove to utilize the tip butt battery bag's of dislocation hole one end, when needs battery bag opening, make dislocation clamp slide along the slide hole, make the tip butt battery bag gradually of dislocation hole, thereby under the butt effect of dislocation hole, open the opening of battery bag, so as to annotate the liquid in the battery bag.
The present application may be further configured in a preferred example to: still be provided with mounting bracket lift cylinder on the first organism, be provided with the mounting bracket on the mounting bracket lift cylinder, be provided with elevator motor on the mounting bracket, elevator motor's output pole fixedly connected with screw rod, annotate the liquid frame cover and locate the screw rod, be provided with the lift guide arm on the mounting bracket, annotate the liquid frame and slide the cover and locate on the lift guide arm.
Through adopting above-mentioned technical scheme, when first carousel drive rack and battery bag rotate to annotate the below of liquid frame, start the mounting bracket lift cylinder, drive the mounting bracket slip and descend to suitable position, then start elevator motor and drive the screw rod and rotate, annotate the liquid frame and descend along the slip of lift guide arm under the screw thread effect on the screw rod to in making the opening claw piece insert battery bag, can annotate the liquid operation. The lifting motor is used for driving the liquid injection frame to lift up and down, and the lifting motor is used for adjusting the descending distance of the liquid injection frame, so that when liquid is injected into battery bags with different sizes, the proper descending distance can be selected.
The present application may be further configured in a preferred example to: the utility model discloses a liquid injection rack, including annotating the liquid frame, annotate the one end of liquid frame be provided with and be used for the drive dislocation clamp slides dislocation cylinder, dislocation cylinder's piston rod butt in dislocation clamp, just dislocation clamp butt is provided with reset spring in dislocation cylinder's one end, reset spring's both ends respectively with dislocation clamp and rack fixed connection, open and close the subassembly including set up in annotate the control cylinder on the liquid frame, control cylinder's piston rod with opening claw piece fixed connection, just control cylinder with dislocation cylinder is perpendicular setting.
Through adopting above-mentioned technical scheme, when elevator motor drove annotating the liquid frame and descends to suitable height, start dislocation cylinder makes the piston rod butt of dislocation cylinder in the one side that is close to the osculum end of dislocation clamp for dislocation clamp slides along the slide opening, thereby opens the opening of battery bag, thereby is convenient for insert the opening claw piece in the opening of battery bag. By starting the control cylinder, a piston rod of the control cylinder drives the opening claw piece to move, and the opening amplitude of the opening of the battery bag is increased, so that the liquid injection pipe can be accurately aligned with the inside of the battery bag.
The present application may be further configured in a preferred example to: the lifting device is characterized in that a fixing rod is arranged on the first machine body, a fixing plate is arranged on the fixing rod, a first air cylinder is arranged on the fixing plate, a piston rod of the first air cylinder penetrates through the fixing plate, a lifting plate is arranged on the piston rod of the first air cylinder, and the driving air cylinder is located on the lifting plate.
Through adopting above-mentioned technical scheme, after the battery bag is accomplished annotating liquid and is kept stand the plastic, utilize first cylinder to drive the lifter plate and descend for splint can be located the side of battery bag, through the action of actuating cylinder, make actuating cylinder's piston rod drive splint centre gripping battery bag's border, utilize the electric heating wire on the splint to melt the plastic-aluminum membrane of electromagnetism bag, accomplish and seal once.
The present application may be further configured in a preferred example to: the second machine body is internally provided with a sealing base which is matched with the sealing pressing plate in a lifting manner, the sealing base is positioned at the bottom of the second rotary table, the sealing pressing plate and the sealing base are oppositely arranged, the sealing base is provided with a jack which is matched with the puncture needle in a plugging manner, and the puncture needle is plugged into the jack.
Through adopting above-mentioned technical scheme, when the battery bag need carry out the evacuation operation, be close to each other sealing pressure plate and sealing base to the border of centre gripping battery bag. The puncture needles on the sealing pressing plate puncture the aluminum plastic film of the battery bag, and the gas in the battery bag is pumped away, so that a vacuum environment is formed in the battery bag. And then sealing the aluminum plastic film for the second time by an electric heating wire on the sealing pressing plate.
The present application may be further configured in a preferred example to: the second machine body is provided with a base cylinder for driving the sealing base to lift, the base cylinder is positioned at the bottom of the second turntable, a piston rod of the base cylinder is fixedly connected with the sealing base, and the base cylinder and the pressing plate cylinder act simultaneously.
Through adopting above-mentioned technical scheme, utilize base cylinder and clamp plate cylinder simultaneous movement for when the battery bag shifts to the below of sealing the clamp plate, sealing the clamp plate and sealing the base and can be close to each other simultaneously, grasp the outer plastic-aluminum membrane of tool box, thereby can carry out the secondary to the battery bag and seal.
The present application may be further configured in a preferred example to: the second machine body is provided with an air cylinder frame, the air cylinder frame is provided with a second air cylinder for controlling the lifting of the sealing pressing plate, a piston rod of the second air cylinder is provided with a pressing plate frame, the sealing pressing plate is positioned at the bottom of the pressing plate frame, the air pump is fixedly arranged on the pressing plate frame, the pressing plate frame is provided with a needle cylinder for controlling the movement of a needle, and the needle is fixedly connected with the piston rod of the needle cylinder.
Through adopting above-mentioned technical scheme, utilize the second cylinder to drive the lifting of platen, control seal clamp plate and seal base centre gripping battery bag's plastic-aluminum membrane, when seal clamp plate and seal base press from both sides steady battery bag, start the felting needle cylinder, pop out the surface of seal clamp plate with the felting needle to puncture the plastic-aluminum membrane, draw the gas in the packing.
The present application may be further configured in a preferred example to: the second machine body is further provided with a cutting fixing frame, the top of the cutting fixing frame is provided with a cutting cylinder, a cutting blade for cutting a battery bag is arranged on a piston rod of the cutting cylinder, the cutting blade is connected with the cutting fixing frame in a sliding mode, and the cutting blade is attached to the edge of the jig box.
Through adopting above-mentioned technical scheme, when the battery bag accomplished the secondary and sealed, leave unnecessary packing between secondary and the primary and seal the department, consequently shift the battery bag to the below of cutting the mount, start and cut the cylinder and drive and cut the blade and cut the plastic-aluminum membrane excision that will expose outside the tool box for the battery outward appearance is compacter and pleasing to the eye.
In a second aspect, the present application provides a method for using a liquid filling and sealing device for a lithium battery, which adopts the following technical scheme:
the liquid injection sealing equipment for the lithium battery further comprises the following steps:
s1, packaging a bare cell with an aluminum plastic film to form a battery bag, wherein the edge of the aluminum plastic film is reserved with a sufficient length;
s2, placing the battery bag on a placing frame, enabling the misplacement clamp to clamp one side of the battery bag, and enabling the battery bag to be in an upward opening state;
s3, starting a first rotary table, transferring the battery bag to the lower part of the liquid injection frame, starting a dislocation cylinder and a control cylinder to open an opening of the battery bag, inserting a liquid injection pipe into the battery bag for liquid injection, and standing and shaping the battery bag after liquid injection is completed;
s4, transferring the battery bag after liquid injection to the lower part of the clamping plate, starting the driving cylinder to enable the clamping plate to clamp the edge of the battery bag, enabling the electric heating wire to generate heat, and melting the aluminum-plastic film to finish one-time sealing;
s5, transferring the once sealed battery bag to a second rotary table, and fixing the battery bag by using a jig box, wherein the edge of the once sealed battery bag is positioned outside the jig box, transferring the jig box and the battery bag to the lower part of a sealing pressing plate through the second rotary table, starting a second cylinder to enable the sealing pressing plate to be pressed between a battery core and the edge of the once sealed battery bag, enabling a puncture needle to puncture an aluminum-plastic film outside the jig box and absorb air in the battery bag, and starting an electric heating wire on the sealing pressing plate to secondarily seal the vacuumized aluminum-plastic film;
s6, transferring the battery bag with the secondary sealing to the lower part of a cutting fixing frame, and cutting off the redundant aluminum-plastic film on the battery bag by using a cutting knife.
Through adopting above-mentioned technical scheme, once closing device is at first placed the battery bag on the rack, through the rotation of first carousel, makes the battery bag shift to the below of annotating liquid frame, link and lifter plate in proper order, annotates liquid frame and opens the opening of battery bag through utilizing the opening clamp, pours into electrolyte into the battery bag through annotating the liquid pipe. The electrolyte in the battery bag is subjected to static shaping by the static shaping pressure head on the connecting frame, so that the electrolyte adhered to the battery bag is pushed into the battery bag. The lifting plate drives the clamping plate to clamp the side wall of the battery bag, and the battery bag is sealed once through the electric heating wire.
And the secondary sealing device performs vacuumizing operation on the battery bag after primary sealing, punctures an aluminum-plastic film of the battery bag by using a puncture needle, pumps gas in the battery bag by using an air pump, performs secondary sealing on the battery bag by heating the aluminum-plastic film, and finally transfers the battery bag to the lower part of a cutting blade by using a second rotary table for cutting.
In summary, the present application includes at least one of the following beneficial technical effects:
the battery bags are sequentially placed on the first rotary table and the second rotary table, so that the battery bags are automatically transferred into the sealing device for sealing after the liquid injection is completed, the number of workers required by processing operation is reduced, and the cost is reduced;
through electrical control in the battery production process, the battery production speed is increased, the working efficiency is improved, and therefore large-scale production can be achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present application;
FIG. 2 is a schematic view of a primary seal of the present application;
FIG. 3 is a schematic view of a rack in the primary seal of the present application;
FIG. 4 is a schematic view of a liquid filling frame in the primary seal device of the present application;
FIG. 5 is a schematic view of a connector in the primary seal of the present application;
FIG. 6 is a schematic view of the clamping plate and the driving cylinder in the primary sealing device of the present application;
FIG. 7 is a schematic view of a secondary seal of the present application;
FIG. 8 is a schematic view of the internal structure of the secondary sealing device of the present application;
FIG. 9 is a schematic view of the platen frame and the sealing platen and lancet on the platen frame in the secondary seal of the present application.
Reference numerals illustrate: 1. a primary sealing device; 100. a first body; 101. a first turntable; 102. a feed channel; 103. sealing the door; 104. an operation hole; 105. a hook claw; 106. a placing rack; 107. a placement groove; 108. a slide hole; 109. a dislocation clamp; 110. staggered holes; 111. a return spring; 112. the mounting rack lifts the air cylinder; 113. a sliding guide rod; 114. a mounting frame; 115. a lifting motor; 116. a screw; 118. a liquid injection frame; 119. a dislocation cylinder; 120. an open claw sheet; 121. a control cylinder; 122. a liquid injection pipe; 123. a liquid injection pump; 124. a connecting frame; 125. standing and shaping air cylinders; 126. standing and shaping a pressure head; 127. a fixed rod; 128. a fixing plate; 129. a first cylinder; 130. a lifting plate; 131. a clamping plate; 132. a driving cylinder; 133. a connecting block; 134. a splint guide rod; 2. a secondary sealing device; 200. a second body; 201. a second turntable; 202. placing the hole; 203. a jig box; 204. a jig base; 205. a jig cover; 206. a jig groove; 207. pressing plate frame; 208. a sealing pressing plate; 209. a pressure plate cylinder; 210. sealing the base; 211. a base cylinder; 212. a needle; 213. an air extracting pump; 214. a lancet cylinder; 215. a jack; 216. cutting a fixing frame; 217. a cutting knife; 218. cutting the slide bar; 219. and cutting the air cylinder.
Description of the embodiments
The present application will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the application provides a liquid filling and sealing device for a lithium battery, which comprises a primary sealing device 1 and a secondary sealing device 2.
Referring to fig. 2, the primary sealing device 1 includes a first body 100 and a first rotating disc 101 rotatably mounted on the first body 100, specifically, the first body 100 is in a sealing arrangement, a feeding channel 102 for placing a battery bag into the first body 100 is fixedly mounted on the first body 100, a feeding port is formed at one end of the feeding channel 102 far away from the first body 100, a sealing door 103 is hinged at the feeding port, and a sealing strip is fixedly mounted at the inner side of the sealing door 103.
Referring to fig. 2, an operation hole 104 for a worker to place a battery pack is formed at one side of the first body 100, the operation hole 104 is located above the feed passage 102, and rubber gloves are fixedly installed on the operation hole 104, thereby isolating the external environment from the environment in the first body 100.
Referring to fig. 2, the first rotary disc 101 is located at the center of the first body 100, a rotation motor for driving the first rotary disc 101 to rotate is installed in the first body 100, the rotation motor is located below the first rotary disc 101, and an output shaft of the rotation motor is fixedly connected with the first rotary disc 101. In this embodiment, the rotation motor is a stepping motor.
Referring to fig. 3, a rack 106 for placing battery bags is fixedly installed on the first turntable 101, a placement groove 107 is formed in the top of the rack 106, and the placement groove 107 is formed along the length direction of the rack 106. The lateral wall of standing groove 107 has seted up a plurality of slide hole 108, and slide hole 108 is rectangular form setting, and a plurality of slide hole 108 along the equidistant distribution of the length direction of rack 106. The top of the placing rack 106 is slidably provided with a dislocation clamp 109, two sides of the dislocation clamp 109 are provided with a hook claw 105, the hook claw 105 is inserted into the sliding hole 108, and the hook claw 105 is slidably matched with the sliding hole 108.
Referring to fig. 3, a dislocation hole 110 is formed at the top of the dislocation clip 109, and a battery pack is placed in the dislocation hole 110. One end of the dislocation hole 110 is provided in a small opening shape, and the small opening end of the dislocation clip 109 abuts against one side of the battery bag. One end of the placing frame 106 is fixedly connected with a reset spring 111 for pulling the dislocation clamp 109 to reset, and the other end of the reset spring 111 is fixedly connected with the small opening end of the dislocation clamp 109. The dislocation holes 110 on the dislocation clamp 109 are a plurality of, and the dislocation holes 110 are distributed at equal intervals along the length direction of the dislocation clamp 109. In this embodiment, four placing racks 106 are disposed on the first turntable 101, and the four placing racks 106 are respectively disposed around the circumference of the first turntable 101 to form a square shape.
Referring to fig. 4, a mounting frame lifting cylinder 112 is fixedly installed on the first body 100, the mounting frame lifting cylinder 112 is vertically disposed, and the mounting frame lifting cylinder 112 is located at a side of the operation hole 104. The first machine body 100 is also fixedly provided with a sliding guide rod 113, a piston rod of the mounting frame lifting cylinder 112 is fixedly connected with a mounting frame 114, two ends of the mounting frame 114 are respectively sleeved on the sliding guide rod 113, and the mounting frame 114 is in sliding fit with the sliding guide rod 113.
Referring to fig. 4, a lifting motor 115 is fixedly installed on the installation frame 114, the lifting motor 115 is located in the middle of the installation frame 114, and the lifting motor 115 is vertically arranged. A screw 116 is fixedly installed on the output shaft of the lifting motor 115. The slip guide rod 113 is further sleeved with a liquid injection frame 118, the liquid injection frame 118 is provided with a screw hole, the screw hole penetrates through the upper surface and the lower surface of the liquid injection frame 118, and the screw rod 116 penetrates through the screw hole, so that the liquid injection frame 118 is in threaded connection with the screw rod 116, and when the lifting motor 115 rotates, the screw rod 116 drives the liquid injection frame 118 to slide up and down along the slip guide rod 113.
Referring to fig. 4, a dislocation cylinder 119 for controlling the dislocation clamp 109 to slide is fixedly installed at one end of the liquid injection frame 118, the piston rods of the dislocation cylinders 119 are distributed along the length direction of the liquid injection frame 118, and when the liquid injection frame 118 slides down along the sliding guide rod 113, the piston rods of the dislocation cylinders 119 are abutted to one side of the dislocation clamp 109 close to the small opening end, so that the dislocation clamp 109 slides along the sliding hole 108.
Referring to fig. 4, an opening jaw 120 for opening an opening of the battery pack is mounted at the bottom of the injection frame 118, and the opening jaw 120 is inserted into the battery pack. The opening claw pieces 120 are two, the two opening claw pieces 120 are oppositely arranged, and the opening claw pieces 120 are parallel to the opening length direction of the battery bag. The side wall of the liquid injection frame 118 is fixedly provided with a control cylinder 121 for driving the two opening claw pieces 120 to approach or separate, specifically, the control cylinder 121 is arranged vertically to the dislocation cylinder 119, one opening claw piece 120 is fixedly connected with the liquid injection frame 118, the other opening claw piece 120 is fixedly connected with a piston rod of the control cylinder 121, and the piston rod of the control cylinder 121 is utilized to drive the two opening claw pieces 120 to separate from each other, so that the opening of the battery bag is punched and clamped. The bottom of the liquid injection frame 118 is also provided with a liquid injection pipe 122, one end of the liquid injection pipe 122 is positioned between the two opening claw pieces 120, the other end of the liquid injection pipe 122 is connected with a liquid injection pump 123, and when the opening claw pieces 120 open the opening of the battery bag, the liquid injection pipe 122 injects electrolyte into the battery bag. In this embodiment, there are multiple groups of opening claw pieces 120, and multiple groups of opening claw pieces 120 are distributed at equal intervals along the length direction of the liquid injection frame 118, and each group of opening claw pieces 120 corresponds to each dislocation hole 110 one by one.
Referring to fig. 5, a connecting frame 124 is fixedly installed on the first machine body 100, the connecting frame 124 is opposite to the operation hole 104, a static shaping cylinder 125 is fixedly installed at the top of the connecting frame 124, the static shaping cylinder 125 is vertically arranged, a through hole for a piston rod of the static shaping cylinder 125 to pass through is formed in the connecting frame 124, one end of the piston rod of the static shaping cylinder 125 passing through the through hole is fixedly installed on a static shaping pressure head 126, when a battery bag is transferred to the lower side of the connecting frame 124, the static shaping cylinder 125 controls the static shaping pressure head 126 to be inserted into the battery bag, and electrolyte adhered on the battery bag is scraped into the bottom of the battery bag.
Referring to fig. 6, a fixing rod 127 is vertically installed on the first body 100, a fixing plate 128 is installed at the top of the fixing rod 127, the fixing plate 128 is disposed opposite to the mounting frame 114, a first cylinder 129 is installed on the fixing plate 128, a lifting plate 130 is fixedly connected to a piston rod of the first cylinder 129, a clamping plate 131 for clamping the edge of a battery bag and a driving cylinder 132 for driving the clamping plate 131 to move are installed at the bottom of the lifting plate 130, the piston rod of the driving cylinder 132 is fixedly connected with the clamping plate 131, connecting blocks 133 are fixedly connected to two ends of the fixing plate 128, a clamping plate guide rod 134 is installed on the connecting blocks 133, the clamping plate 131 is sleeved on the clamping plate guide rod 134, and the clamping plate 131 slides along the clamping plate guide rod 134, so that an opening of the battery bag is closed. The splint 131 is equipped with the electric heater strip towards one side of battery bag, and when splint 131 centre gripping battery bag, the electric heater strip melts the opening of battery bag, makes the battery bag seal once.
Referring to fig. 7, the secondary sealing device 2 includes a second body 200 and a second turntable 201 rotatably mounted on the second body 200, the second turntable 201 is located inside the second body 200, and a driving motor for driving the second turntable 201 to rotate is mounted in the second body 200, and similarly, the driving motor is a stepping motor.
Referring to fig. 8, a placement hole 202 is formed in the second turntable 201, and the placement hole 202 penetrates through the upper and lower surfaces of the second turntable 201. A jig box 203 for placing the battery bag is fixedly arranged in the placing hole 202, and a gap is reserved between the jig box 203 and the edge of the placing hole 202. Specifically, the jig box 203 includes a jig seat 204 fixedly mounted in the placement hole 202 and a jig cover 205 hinged to the jig seat 204, a jig groove 206 similar to the shape of the battery bag is formed in the jig seat 204, the jig cover 205 and the jig seat 204 are in clamping fit with the battery bag, and when the jig box 203 clamps the battery bag, the primary sealing position is located outside the jig box 203. In this example, the second turntable 201 is provided with three placement holes 202, and the three placement holes 202 are respectively arranged in a triangle shape around the center of the second turntable 201.
Referring to fig. 9, a pressing plate frame 207 is fixedly installed on the second body 200, a sealing pressing plate 208 for secondarily sealing the battery bag is installed below the pressing plate frame 207, a pressing plate cylinder 209 is fixedly installed at the top of the pressing plate frame 207, and a piston rod of the pressing plate cylinder 209 is fixedly connected with the sealing pressing plate 208. A sealing base 210 which is matched with the sealing pressing plate 208 to seal the battery bag is arranged in the second machine body 200, the sealing base 210 is positioned below the second turntable 201, the sealing base 210 and the sealing pressing plate 208 are oppositely arranged, and a base cylinder 211 for controlling the sealing base 210 to lift up and down is arranged below the sealing base 210. When the sealing platen 208 and the sealing base 210 are close to each other, the sealing platen 208 is bonded to the side wall of the jig box 203. When the jig rotates below the pressing plate frame 207, the sealing pressing plate 208 and the sealing base 210 clamp the aluminum plastic film of the battery bag exposed outside the jig box 203. In this embodiment, the platen cylinder 209 and the base cylinder 211 operate simultaneously.
Referring to fig. 9, when the sealing pressure plate 208 clamps the battery bag, a puncture needle 212 is movably mounted on a side far away from the jig box 203, a suction hole is formed in the surface of the puncture needle 212, the suction hole is communicated with a suction pump 213, and the suction pump 213 is fixedly connected to the pressure plate frame 207. When the needle pierces the battery pack, the gas pump 213 pumps the gas out of the battery pack. The presser frame 207 is also provided with a puncture needle cylinder 214 for driving the puncture needle 212 to move, and a piston rod of the puncture needle cylinder 214 is fixedly connected with the puncture needle 212. The top surface of the sealing base 210 is provided with a jack 215 matched with the puncture needle 212, and the puncture needle 212 is in plug-in fit with the jack 215.
Referring to fig. 9, an electric heating wire is installed at one side of the sealing pressing plate 208 clamping the battery bag, when the puncture needle 212 vacuumizes the battery bag, the electric heating wire secondarily seals the battery bag, and the secondary sealing part is closer to the battery core of the battery bag.
Referring to fig. 8, a cutting fixing frame 216 is fixedly mounted on the second body 200, the cutting fixing frame 216 is located at the top of the second turntable 201, a cutting knife 217 for cutting the redundant aluminum plastic film of the battery bag is slidably mounted on the cutting fixing frame 216, the cutting knife 217 is located on the side wall of the cutting fixing frame 216, a cutting slide bar 218 for sliding the cutting knife 217 is fixedly mounted on the cutting fixing frame 216, and the cutting slide bar 218 is arranged in the cutting knife 217 in a penetrating manner. The top of the cutting fixing frame 216 is fixedly provided with a cutting air cylinder 219 for driving the cutting knife 217 to slide up and down, and a piston rod of the cutting air cylinder 219 is fixedly connected with the top of the cutting knife 217.
The implementation principle of the application is as follows: the battery pack with the battery cells is placed on the placing frame 106, the first rotating disc 101 is started, the first rotating disc 101 drives the placing frame 106 and the battery pack to rotate below the liquid injection frame 118, and the lifting motor 115 is controlled to enable the liquid injection frame 118 to slide and lift to the position above the placing frame 106. By controlling the piston rod of the dislocation cylinder 119 to extend and abut against the dislocation clamp 109, the small opening end of the dislocation clamp 109 abuts against the side edge of the battery bag, and thus a gap is formed in the opening of the battery bag. The control cylinder 121 is controlled to separate the open claw pieces 120 inserted into the battery bag, thereby expanding the opening of the battery bag, and the electrolyte is injected into the battery bag through the electrolyte injection pipe 122. The stationary shaping ram 126 then pushes the adhered electrolyte into the cell pouch and allows the pouch to rest. The first turntable 101 transfers the battery bag to the clamping plate 131, the piston rod of the driving cylinder 132 drives the clamping plate 131 to close the opening of the battery bag, and the battery bag is heated by the electric heating wire on the clamping plate 131, so that the battery bag is sealed once.
The battery bag after primary sealing is placed in the jig box 203, the second turntable 201 drives the battery bag to be transferred to the lower part of the sealing pressing plate 208, and meanwhile, the pressing plate cylinder 209 and the base cylinder 211 are controlled to act, so that the sealing pressing plate 208 and the sealing base 210 are matched with each other to clamp the part of the battery bag exposed out of the jig box 203. The puncture needle 212 is inserted into the battery pack through the puncture needle cylinder 214, and the suction pump 213 is started to suck the gas in the battery pack. After the extraction is completed, the electric heating wire on the sealing pressing plate 208 is started to seal the battery bag for the second time. The second turntable 201 rotates again to transfer the battery bag to the lower part of the cutting fixing frame 216, and the cutting cylinder 219 is controlled to drive the cutting knife 217 to slide along the cutting slide rod 218, so that the aluminum-plastic film of the battery bag outside the jig box 203 is cut off.
Embodiment two:
s1, packaging a bare cell with an aluminum plastic film to form a battery bag, wherein the edge of the aluminum plastic film is reserved with a sufficient length;
s2, placing the battery bag on a placing rack 106, enabling a dislocation clamp 109 to clamp one side of the battery bag, and enabling the battery bag to be in an upward opening state;
s3, starting the first rotating disc 101, transferring the battery bag to the lower part of the liquid injection frame 118, starting the dislocation cylinder 119 and the control cylinder 121 to open the opening of the battery bag, inserting the liquid injection pipe 122 into the battery bag for liquid injection, and standing and shaping the battery bag after liquid injection is completed;
s4, transferring the battery bag after liquid injection to the lower part of the clamping plate 131, starting the driving cylinder 132, enabling the clamping plate 131 to clamp the edge of the battery bag, enabling the electric heating wire to generate heat, and melting the aluminum-plastic film to finish one-time sealing;
s5, transferring the primary sealed battery bag to a second turntable 201, and fixing the battery bag by using a jig box 203, wherein the edge of the primary seal of the battery bag is positioned outside the jig box 203, transferring the jig box 203 and the battery bag to the lower part of a sealing pressing plate 208 through the second turntable 201, starting a second cylinder to enable the sealing pressing plate 208 to be pressed between a battery core and the edge of the primary seal, enabling a puncture needle 212 to puncture an aluminum-plastic film outside the jig box 203 and suck air in the battery bag, and simultaneously starting an electric heating wire on the sealing pressing plate 208 to secondarily seal the vacuumized aluminum-plastic film;
s6, transferring the battery bag with the secondary sealing to the lower part of a cutting fixing frame 216, and cutting off the redundant aluminum-plastic film on the battery bag by using a cutting knife 217.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. The liquid injection sealing equipment of the lithium battery is characterized by comprising a primary sealing device (1) and a secondary sealing device (2);
the primary sealing device (1) comprises a first machine body (100) and a first rotary table (101) rotatably arranged on the first machine body (100), a placing frame (106) for placing a battery bag is arranged on the first rotary table (101), a liquid injection frame (118) is arranged on the first machine body (100) in a lifting mode, an opening claw piece (120) for opening the battery bag is arranged at the bottom of the liquid injection frame (118), the opening claw piece (120) is inserted into the battery bag, a liquid injection pipe (122) is arranged in the opening claw piece (120), the liquid injection pipe (122) is connected with a liquid injection pump (123), and an opening and closing assembly for controlling the opening claw piece (120) to open or close is connected to the liquid injection frame (118);
the battery pack is characterized in that a connecting frame (124) is arranged on the first machine body (100), a static shaping press head (126) is arranged at the bottom of the connecting frame (124), a static shaping cylinder (125) is arranged at the top of the connecting frame (124), a piston rod of the static shaping cylinder (125) is fixedly connected with the static shaping press head (126), and the static shaping press head (126) is abutted to the inner wall of the battery pack;
the battery pack is characterized in that a clamping plate (131) connected to the first machine body (100) in a sliding manner is further arranged on the first machine body (100), the clamping plate (131) is clamped at the edge of the battery pack, a driving cylinder (132) for driving the clamping plate (131) to move is further arranged on the first machine body (100), an electric heating wire is arranged on one side, clamped by the clamping plate (131), of the battery pack, and the electric heating wire is abutted to the opening of the battery pack;
the secondary sealing device (2) comprises a second machine body (200) and a second rotary table (201) which is rotatably arranged in the second machine body (200), a jig box (203) for clamping a battery bag is arranged on the second rotary table (201), a pressing plate cylinder (209) is arranged on the second machine body (200), a sealing pressing plate (208) for secondarily sealing the battery bag is arranged on a piston rod of the pressing plate cylinder (209), a puncture needle (212) is arranged on one side, facing the battery bag, of the sealing pressing plate (208), a suction hole is formed in the puncture needle (212), the suction hole of the puncture needle (212) is connected with a suction pump (213), and an electric heating wire is arranged on one side, clamping the battery bag, of the sealing pressing plate (208);
the first machine body (100) and the second machine body (200) are internally provided with rotating motors for driving the first rotary table (101) and the second rotary table (201) to rotate.
2. The liquid filling and sealing device of a lithium battery according to claim 1, wherein a placing groove (107) is vertically formed in the placing rack (106), a dislocation clamp (109) is arranged at the top of the placing groove (107), a dislocation hole (110) is formed in the dislocation clamp (109), one end of the dislocation hole (110) is arranged in a small opening shape, the small opening end of the dislocation hole (110) is abutted to the side edge of a battery bag, a sliding hole (108) is formed in the placing rack (106), the sliding hole (108) is arranged in a strip shape, the sliding hole (108) is formed along the length direction of the placing rack (106), the side wall of the dislocation clamp (109) is inserted in the sliding hole (108), and the dislocation clamp (109) slides along the sliding hole (108).
3. The liquid injection and sealing device of a lithium battery according to claim 2, wherein the first machine body (100) is further provided with a mounting frame lifting cylinder (113), the mounting frame lifting cylinder (113) is provided with a mounting frame (114), the mounting frame (114) is provided with a lifting motor (115), an output rod of the lifting motor (115) is fixedly connected with a screw rod (116), the liquid injection frame (118) is sleeved on the screw rod (116), the mounting frame (114) is provided with a lifting guide rod (117), and the liquid injection frame (118) is slidably sleeved on the lifting guide rod (117).
4. The liquid filling and sealing device for the lithium battery according to claim 3, wherein one end of the liquid filling frame (118) is provided with a dislocation cylinder (119) for driving the dislocation clamp (109) to slide, a piston rod of the dislocation cylinder (119) is abutted to the dislocation clamp (109), one end of the dislocation clamp (109) abutted to the dislocation cylinder (119) is provided with a reset spring (111), two ends of the reset spring (111) are fixedly connected with the dislocation clamp (109) and the placement frame (106) respectively, the opening and closing assembly comprises a control cylinder (121) arranged on the liquid filling frame (118), the piston rod of the control cylinder (121) is fixedly connected with the opening claw piece (120), and the control cylinder (121) is vertically arranged with the dislocation cylinder (119).
5. The liquid filling and sealing device for lithium batteries according to claim 1, wherein a fixing rod (127) is arranged on the first machine body (100), a fixing plate (128) is arranged on the fixing rod (127), a first air cylinder (129) is arranged on the fixing plate (128), a piston rod of the first air cylinder (129) penetrates through the fixing plate (128), a lifting plate (130) is arranged on the piston rod of the first air cylinder (129), and the driving air cylinder (132) is arranged on the lifting plate (130).
6. The liquid injection and sealing device of the lithium battery according to claim 1, wherein a sealing base (210) which is in clamping fit with the sealing pressing plate (208) is arranged in the second machine body (200) in a lifting manner, the sealing base (210) is located at the bottom of the second rotary table (201), the sealing pressing plate (208) and the sealing base (210) are oppositely arranged, a jack (215) which is in plugging fit with the spike (212) is formed in the sealing base (210), and the spike (212) is plugged into the jack (215).
7. The liquid filling and sealing device for the lithium battery according to claim 6, wherein a base cylinder (211) for driving the sealing base (210) to lift is arranged on the second machine body (200), the base cylinder (211) is located at the bottom of the second rotary table (201), a piston rod of the base cylinder (211) is fixedly connected with the sealing base (210), and the base cylinder (211) and the pressing plate cylinder (209) act simultaneously.
8. The liquid filling and sealing device of the lithium battery according to claim 6, wherein an air cylinder frame is arranged on the second machine body (200), a second air cylinder for controlling the lifting of the sealing pressing plate (208) is arranged on the air cylinder frame, a pressing plate frame (207) is arranged on a piston rod of the second air cylinder, the sealing pressing plate (208) is positioned at the bottom of the pressing plate frame (207), the air pump (213) is fixedly arranged on the pressing plate frame (207), a needle cylinder (214) for controlling the movement of a needle (212) is arranged on the pressing plate frame (207), and the needle (212) is fixedly connected with the piston rod of the needle cylinder (214).
9. The liquid filling and sealing device of a lithium battery according to claim 1, wherein a cutting fixing frame (216) is further arranged on the second machine body (200), a cutting cylinder (219) is arranged at the top of the cutting fixing frame (216), a cutting knife (217) piece for cutting a battery bag is arranged on a piston rod of the cutting cylinder (219), the cutting knife (217) piece is in sliding connection with the cutting fixing frame (216), and the cutting knife (217) piece is attached to the edge of the jig box (203).
10. The method of using a liquid filling and sealing device for a lithium battery according to claim 1, wherein the liquid filling and sealing device for a lithium battery according to any one of claims 1 to 9 is used, further comprising the steps of:
s1, packaging a bare cell with an aluminum plastic film to form a battery bag, wherein the edge of the aluminum plastic film is reserved with a sufficient length;
s2, placing the battery bag on a placing frame (106), enabling a dislocation clamp (109) to clamp one side of the battery bag, and enabling the battery bag to be in an upward opening state;
s3, starting the first rotating disc (101), transferring the battery bag to the lower part of the liquid injection frame (118), starting the dislocation cylinder (119) and the control cylinder (121) to open the opening of the battery bag, inserting the liquid injection pipe (122) into the battery bag for liquid injection, and standing and shaping the battery bag after liquid injection is completed;
s4, transferring the battery bag after liquid injection to the position below the clamping plate (131), starting the driving cylinder (132), enabling the clamping plate (131) to clamp the edge of the battery bag, enabling the electric heating wire to generate heat, and melting the aluminum-plastic film to finish one-time sealing;
s5, transferring the once sealed battery bag onto a second rotary table (201), and fixing the battery bag by utilizing a jig box (203), wherein the edge of the once sealed battery bag is positioned outside the jig box (203), transferring the jig box (203) and the battery bag to the lower part of a sealing pressing plate (208) through the second rotary table (201), starting a second cylinder to enable the sealing pressing plate (208) to be pressed between a battery core and the edge of the once sealed battery bag, enabling a puncture needle (212) to puncture an aluminum-plastic film outside the jig box (203) and absorb air in the battery bag, and simultaneously starting an electric heating wire on the sealing pressing plate (208) to secondarily seal the vacuumized aluminum-plastic film;
s6, transferring the battery bag with the secondary sealing to the lower part of a cutting fixing frame (216), and cutting off the redundant aluminum plastic film on the battery bag by using a cutting knife (217).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210020726.6A CN114361743B (en) | 2022-01-10 | 2022-01-10 | Liquid injection sealing equipment for lithium battery and application method of liquid injection sealing equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210020726.6A CN114361743B (en) | 2022-01-10 | 2022-01-10 | Liquid injection sealing equipment for lithium battery and application method of liquid injection sealing equipment |
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| CN114361743B true CN114361743B (en) | 2023-09-29 |
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| CN115064849B (en) * | 2022-07-25 | 2024-05-28 | 徐州芯源动力科技有限公司 | Automatic sleeve cup mounting device for manufacturing lithium ion battery |
| CN115207581B (en) * | 2022-09-19 | 2022-11-25 | 深圳市铂纳特斯自动化科技有限公司 | Full-automatic helium filling and nailing device for square lithium battery |
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| KR20160107730A (en) * | 2015-03-05 | 2016-09-19 | (주)엔에스 | Battery Cell Degassing And Sealing Machine |
| CN106532126A (en) * | 2016-11-07 | 2017-03-22 | 惠州亿纬锂能股份有限公司 | Automatic production line of soft package lithium battery |
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