CN114188679B - Liquid injection machine for lithium battery and application method of liquid injection machine - Google Patents
Liquid injection machine for lithium battery and application method of liquid injection machine Download PDFInfo
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- CN114188679B CN114188679B CN202111501814.XA CN202111501814A CN114188679B CN 114188679 B CN114188679 B CN 114188679B CN 202111501814 A CN202111501814 A CN 202111501814A CN 114188679 B CN114188679 B CN 114188679B
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- liquid
- liquid injection
- lithium battery
- stopping mechanism
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- 239000007788 liquid Substances 0.000 title claims abstract description 248
- 238000002347 injection Methods 0.000 title claims abstract description 144
- 239000007924 injection Substances 0.000 title claims abstract description 144
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 117
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 109
- 239000003792 electrolyte Substances 0.000 claims abstract description 75
- 238000003860 storage Methods 0.000 claims description 37
- 238000007789 sealing Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 12
- 210000003437 trachea Anatomy 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000037452 priming Effects 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/673—Containers for storing liquids; Delivery conduits therefor
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention provides a liquid injection machine for a lithium battery and a use method thereof, and relates to the field of lithium battery production, wherein the liquid injection machine comprises a frame, a liquid injection module and a lithium battery tray module, the liquid injection module comprises an upper cup structure and a lower cup structure, the upper cup structure comprises an upper cup body for containing electrolyte and a first cup body outflow opening for enabling the electrolyte to flow out of the upper cup body, and a first flow stopping mechanism for preventing the electrolyte from flowing out of a first cup body outflow hole is arranged in the upper cup body; the lower cup structure comprises a lower cup body for containing electrolyte and a second cup body outflow opening for enabling the electrolyte to flow out of the lower cup body, a second flow stopping mechanism for stopping the electrolyte from flowing out of the second cup body outflow opening is arranged in the lower cup body, and the upper cup body and the lower cup body are arranged in an eccentric manner; the lithium battery tray module pushes the supporting plate to move towards the direction of the liquid injection module, and the upper cup body and the lower cup body are arranged in an off-axis mode to be matched with the first flow stopping mechanism and the second flow stopping mechanism, so that independent control can be realized on the upper cup body and the lower cup body.
Description
Technical Field
The invention relates to lithium battery production equipment, in particular to a liquid injection machine for a lithium battery and a use method thereof.
Background
With the development of the electric automobile industry, lithium batteries are widely applied to various industry fields as power energy sources of the electric automobile industry. The lithium ion lithium battery is closely related to life of people, and the process of injecting electrolyte into a lithium battery shell is an indispensable process in the production process of the lithium ion lithium battery, so that a liquid injector for injecting the electrolyte into the lithium battery appears. As an important step of lithium ion lithium battery production, namely liquid injection, the method is mainly completed in a drying room, and the lower the dew point is below-45 ℃, the better. The shorter and better the exposure time under the electrolyte environment, if in the ordinary room, the air is not dry, 30 seconds is enough to make the electrolyte moisture high enough to seriously disqualify, moreover, the structure of the general liquid injection equipment in the industry is complex and huge, and a larger drying room is needed to be occupied, so that the whole room is required to be dried and dehumidified, the energy consumption of the dehumidifier accounts for about 43% of the energy consumption of the whole production, the maintenance and operation cost of the drying room are very high, the manufacturing cost of the lithium battery is greatly stressed, and the health of people is greatly influenced when the lithium battery works in the drying room.
There are two types of liquid injection machines in the downstream industry: the open type liquid filling machine is suitable for filling liquid into large-sized high-capacity lithium batteries, and for filling liquid into large-capacity high-density lithium batteries, the problems of low efficiency, high equipment cost, large occupied space, difficult liquid discharging, open liquid filling port of the lithium batteries, high maintenance and operation cost of a drying room and the like are solved, and the dew point in the lithium battery is required to be kept below-45 ℃ for a long time in order to ensure the quality of the lithium batteries.
The other is a glove box type liquid injection machine which is suitable for small-sized low-capacity lithium batteries, and for small-sized lithium batteries, the liquid injection equipment is complex in structure and small, and the sealing ring is aged through electrolytic corrosion, so that the sealing performance is reduced, and the replacement of the sealing ring is complex. The equipment is in the sealed glove box, so the maintenance is difficult, the maintenance time is longer, the maintenance cost is higher, and the problem is not easy to find out.
Therefore, it is necessary to provide a new liquid injection device and method, which overcomes the disadvantages of weak full sealing, low liquid injection efficiency and inconvenient maintenance in the liquid injection process of the existing device and method.
Disclosure of Invention
The invention provides a liquid injection machine for a lithium battery and a use method thereof, and aims to overcome the defects of the conventional equipment.
To achieve the above object, an embodiment of the present invention provides a liquid injector for a lithium battery, including:
a frame;
the liquid injection module is arranged above the rack and comprises an upper cup structure and a lower cup structure, wherein the upper cup structure comprises an upper cup body for containing electrolyte and a first cup body outflow opening for enabling the electrolyte to flow out of the upper cup body, and a first flow stopping mechanism for stopping the electrolyte from flowing out of a first cup body outflow hole is arranged in the upper cup body; the upper cup structure further comprises an upper layer plate, the upper layer plate is arranged at the top of the upper cup body, an upper layer air inlet channel and a liquid inlet channel communicated with electrolyte are arranged on the upper layer plate, the liquid inlet channel and the upper layer air inlet channel are both communicated with a cavity formed by the upper cup body, the upper layer air inlet channel comprises an upper layer pressurizing channel and an upper layer pressure relief channel, an upper layer pressurizing electromagnetic valve is arranged in the upper layer pressurizing channel, and an upper layer negative pressure electromagnetic valve is arranged in the upper layer pressure relief channel;
the lower cup structure comprises a lower cup body for containing electrolyte and a second cup body outflow opening for enabling the electrolyte to flow out of the lower cup body, a second flow stopping mechanism for stopping the electrolyte from flowing out of the second cup body outflow opening is arranged in the lower cup body, the lower cup structure further comprises a lower layer plate, the lower layer plate is arranged at the top of the lower cup body, the lower layer plate is provided with a lower liquid channel and a lower air inlet channel, the lower liquid channel is communicated with a first cup body outflow hole and a cavity formed by the lower cup body, the lower air inlet channel is communicated with a cavity formed by the lower cup body, the lower air inlet channel is provided with a lower pressurizing channel, a lower pressure releasing channel and a lower normal pressure channel, a lower pressurizing electromagnetic valve is arranged in the lower pressurizing channel, a lower negative pressure electromagnetic valve is arranged in the lower pressure releasing channel, a lower normal pressure electromagnetic valve is arranged in the lower pressure releasing channel, the second cup body outflow opening is provided with a liquid injecting structure for injecting the electrolyte into the lithium battery, and the upper cup body and the lower cup body are axially arranged;
the lithium battery tray module is arranged below the rack and comprises a supporting plate for placing a lithium battery, a lifting structure is arranged below the supporting plate, and the lifting structure pushes the supporting plate to move towards the liquid injection module.
Preferably, the upper cup structure further comprises an upper inner cavity base, the upper inner cavity base is arranged between the upper cup body and the lower layer plate, the upper surface of the upper inner cavity base is recessed downwards to form a first conical lower liquid level, and the first cup body outflow hole is arranged at the bottom of the first conical lower liquid level; the first flow stopping mechanism comprises a first liquid storage cylinder, the first liquid storage cylinder is arranged on the upper layer plate, the movable end of the first liquid storage cylinder is connected with a first inserting rod, the first inserting rod is located in the upper cup body and can plug a first cup outflow hole under the pushing of the first liquid storage cylinder, the lower cup structure comprises a lower inner cavity base, the lower inner cavity base is arranged at the lower end of the lower cup body, a reference plate is connected with the lower side of the lower inner cavity base and fixed on the frame, the upper surface of the lower inner cavity base is sunken downwards to form a second conical lower liquid level, the second cup outflow hole is arranged at the bottom of the second conical lower liquid level, the second flow stopping mechanism comprises a second liquid storage cylinder, the second liquid storage cylinder is arranged on the lower layer plate, the movable end of the second cylinder is connected with a second inserting rod, and the second inserting rod is located in the lower cup body and can plug a second cup body outflow hole under the pushing of the second liquid storage cylinder.
Preferably, the first liquid storage cylinder is connected with the first inserting rod, the second liquid storage cylinder is connected with the second inserting rod through a flow stopping connecting piece, the upper end of the flow stopping connecting piece is connected with the movable end of the first liquid storage cylinder or the movable end of the second liquid storage cylinder, an upward concave accommodating space is formed in the lower end of the flow stopping connecting piece, a side hole is formed in the side wall of the flow stopping connecting piece, the side hole is communicated with the accommodating space, and the first inserting rod or the second inserting rod slides into the accommodating space through the side hole and limits the relative positions of the first inserting rod, the second inserting rod and the connecting piece in the longitudinal direction.
Preferably, annotate the liquid module and include a plurality ofly, a plurality of notes liquid module are rectangular array and arrange for annotate liquid machine of lithium cell still includes trachea confluence piece and lower trachea confluence piece, go up trachea confluence piece and include first trunk line and a plurality of first branch pipelines and the second branch pipeline of first trunk line intercommunication, the upper supercharging passageway intercommunication of each notes liquid module of first branch pipeline, the upper supercharging passageway intercommunication of second branch pipeline and each notes liquid module, lower trachea confluence piece includes second trunk line and a plurality of third branch pipeline, fourth branch pipeline and the fifth branch pipeline of second trunk line intercommunication, the lower supercharging passageway of each notes liquid module of third branch pipeline intercommunication, the lower supercharging passageway of each notes liquid module of fourth branch pipeline intercommunication, the lower normal pressure passageway of each notes liquid module of fifth branch pipeline intercommunication.
Preferably, the liquid injection structure comprises a liquid injection guide sleeve, a liquid injection nozzle is arranged in the liquid injection guide sleeve, the liquid injection nozzle is communicated with the second cup outflow hole, the liquid injection nozzle comprises a body and a protrusion arranged below the body, the body is provided with a liquid injection channel communicated with the second cup outflow hole, and a liquid injection side hole is formed in the side face of the liquid injection channel.
Preferably, the liquid injection structure further comprises a liquid injection fixing sleeve, the liquid injection fixing sleeve is arranged below the reference plate, the liquid injection fixing sleeve is annular, an inner ring of the liquid injection fixing sleeve is stepped, and an inner ring of the liquid injection fixing sleeve is used for clamping a liquid injection nozzle.
Preferably, a plurality of upper guide cups are arranged below the reference plate, each liquid injection structure is arranged in each upper guide cup, a lower guide cup is arranged above the supporting plate, the lower guide cups are arranged corresponding to the upper guide cups, and the upper guide cups and the lower guide cups are coaxially arranged.
Preferably, the support plate is provided with the guiding hole that supplies the lithium cell to go up and down in lower guiding cup department, lithium cell tray module still is provided with the bottom plate, the bottom plate sets up the below of support plate, the bottom plate with be provided with the support column between the support plate, the both ends of support column are connected with bottom plate and support plate respectively, the bottom plate is provided with elasticity butt mechanism and end through-hole, be provided with the stopper in the end through-hole, elasticity butt mechanism includes the traveller, the one end of traveller is provided with spacing butt piece, and the other end is provided with the benchmark piece of butt lithium cell, the traveller passes in the end through-hole and spacing butt piece and stopper butt, the benchmark piece with still be provided with the spring between the stopper, the benchmark piece is provided with the lithium cell post hole of undercut.
Preferably, the lifting mechanism comprises a lifting cylinder, the fixed end of the lifting cylinder is connected with the frame, the movable end of the lifting cylinder is connected with a sliding plate, two parallel sliding grooves are formed in the upper surface of the sliding plate, a sliding rail is arranged on the lower surface of the bottom plate, and the sliding rail is arranged in the sliding groove in a sliding manner to adjust the coaxiality of the upper guide cup and the lower guide cup.
The invention also provides a liquid injection method of the lithium battery, which adopts the liquid injection machine for the lithium battery and comprises the following steps:
s0. the lithium batteries are arranged on the tray, and a detachable liquid injection valve is arranged for each lithium battery, so that the lithium batteries on the supporting plate are kept away from the liquid injection structure, and the upper cup body and the lower cup body are kept in a normal pressure state;
s1, closing a first flow stopping mechanism, opening a second flow stopping mechanism, pushing a supporting plate to move upwards until an attachable and detachable liquid injection valve is in contact with a liquid injection structure to form a sealing channel, and vacuumizing a lower cup body to enable the lower cup body and a cavity of a lithium battery to be in a negative pressure state;
s2, closing the first flow stopping mechanism, opening the second flow stopping mechanism, enabling the supporting plate to move downwards to enable the lithium battery to be separated from the liquid injection structure, and discharging vacuum from the lower cup body;
s3, opening the first flow stopping mechanism, closing the second flow stopping mechanism to enable the upper cup body and the lower cup body to be in a normal pressure state, and injecting electrolyte into the upper cup body;
s4, keeping the first flow stopping mechanism open and the second flow stopping mechanism closed, and performing supercharging treatment on the upper cup body;
s5, closing the first flow stopping mechanism, keeping the second flow stopping mechanism in a closed state, and releasing pressure of the upper cup body in a vacuum state;
s6, keeping the first flow stopping mechanism closed, lifting the lifting mechanism, enabling the detachable liquid injection valve to be in contact with the liquid injection structure to form a sealing channel, opening the second flow stopping mechanism, and enabling electrolyte to flow into a cavity of the lithium battery;
s7, pressurizing the lower cup body, and fully pressing electrolyte into the inner cavity of the lithium battery;
s8, keeping the first flow stopping mechanism closed, opening the second flow stopping mechanism, performing negative pressure treatment on the lower cup body, and pumping electrolyte and gas generated by a pole piece of the lithium battery into the lower cup body;
s9, keeping the first flow stopping mechanism closed, opening the second flow stopping mechanism, discharging vacuum from the lower cup body, and discharging the electrolyte in the step S8 and the gas generated by the pole piece of the lithium battery out of the lower cup body;
s10, keeping the first flow stopping mechanism closed, opening the second flow stopping mechanism, pressurizing the lower cup body, and pressing electrolyte remained in the lower cup body into an inner cavity of the lithium battery;
s11, keeping the first flow stopping mechanism closed, and opening the second flow stopping mechanism, wherein the inner cavity of the lithium battery is in a normal pressure state through pressure relief treatment of the lower cup body;
s12, closing the first flow stopping mechanism and the second flow stopping mechanism, and enabling the lifting mechanism to descend, install and detach the liquid injection valve and the liquid injection structure to be separated, so that the liquid injection is completed.
The scheme of the invention has the following beneficial effects:
in the invention, the upper cup body and the lower cup body are matched with the first flow stopping mechanism and the second flow stopping mechanism in a mode of being arranged in an eccentric way, so that the upper cup body and the lower cup body can be independently controlled, and different operations such as liquid preparation and liquid injection can be simultaneously carried out between the upper cup body and the lower cup body; in the whole process of liquid injection, the electrolyte is not contacted with air, so that the moisture absorption opportunity of the electrolyte is greatly reduced, the quality of the electrolyte is ensured, and the rejection rate of the lithium battery is reduced.
Drawings
FIG. 1 is an overall schematic of the present invention;
FIG. 2 is a schematic illustration of the flow of liquid according to the present invention;
FIG. 3 is a top view of the priming module;
FIG. 4 is a schematic view of the upper and lower cup mechanisms;
FIG. 5 is a schematic illustration of a flow stop connection with a first bayonet;
FIG. 6 is a schematic illustration of the connection of the priming guide sleeve, the priming nozzle, and the priming fixing sleeve;
FIG. 7 is a longitudinal cross-sectional view of FIG. 6;
FIG. 8 is a schematic view of a lithium battery tray module;
FIG. 9 is a longitudinal cross-sectional view of FIG. 8;
fig. 10 is a state diagram of the operation of the components of the method for using the liquid filling machine for lithium batteries.
[ reference numerals description ]
1-a frame;
2-a liquid injection module;
the device comprises a 21-upper cup structure, a 211-upper cup body, a 212-first flow stopping mechanism, a 213-upper plate, a 214-upper layer air inlet channel, a 215-liquid inlet channel, a 216-upper inner cavity base, 2121-first liquid storage cylinders, 2122-first inserting rods and 2123-flow stopping connectors;
the device comprises a 22-lower cup structure, a 221-lower cup body, a 222-second flow stopping mechanism, a 223-lower layer plate, a 224-lower liquid channel, a 225-lower layer air inlet channel, a 226-liquid injection structure, a 227-lower inner cavity base, a 228-reference plate, a 2221-second liquid storage cylinder, a 2222-second inserting rod, a 23-upper air pipe confluence block, a 24-lower air pipe confluence block, a 2261-liquid injection guide sleeve, a 2262-liquid injection nozzle, a 2262 a-body, a 2262 b-bulge, a 2262 c-liquid injection side hole, a 2263-liquid injection fixing sleeve and a 2281-upper guide cup;
3-lithium battery tray module, 31-supporting plate, 311-lower guide cup, 312-guide hole, 313-bottom plate, 314-support column, 315-limit block, 316-elastic abutting mechanism, 3131-bottom through hole, 3132-limit block, 3161-slide column, 3162-reference block and 3162 a-lithium battery pole column hole;
32-lifting structure, 321-lifting cylinder and 322-slide plate;
m-detachable notes liquid valve, N-lithium cell.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 9, a liquid injection machine for a lithium battery comprises a frame 1, a liquid injection module 2 and a lithium battery tray module 3, wherein the frame 1 is used for supporting the liquid injection module 2 and the lithium battery tray module 3. The liquid injection module 2 is arranged above the frame 1, and the lithium battery tray module 3 is arranged below the frame 1.
Specifically, the liquid injection module 2 includes an upper cup structure 21 and a lower cup structure 22, the upper cup structure 21 includes an upper cup 211 for containing electrolyte and a first cup outflow opening through which the electrolyte flows out of the upper cup 211, and a first flow stop mechanism 212 is further provided in the upper cup 211. The first flow stop mechanism 212 may control the flow of electrolyte out through the first cup flow outlet. The upper cup structure 21 further comprises an upper layer plate 213, the upper layer plate 213 is arranged at the top of the upper cup body 211, the upper layer plate 213 is provided with a liquid inlet channel 215 and an upper layer air inlet channel 214, wherein the liquid inlet channel 215 is used for connecting an external electrolyte source, the upper layer air inlet channel 214 comprises an upper layer pressurizing channel and an upper layer pressure relief channel, an upper layer pressurizing electromagnetic valve is arranged in the upper layer pressurizing channel, and an upper layer negative pressure electromagnetic valve is arranged in the upper layer pressure relief channel; the liquid inlet channel 215 and the upper layer air inlet channel 214 can be communicated with the cavity formed by the upper cup body 211. Preferably, in this embodiment, the upper layer pressurizing channel and the upper layer pressure releasing channel are combined into a pipeline, and the purposes of pressurizing and releasing pressure are achieved through opening and closing of the upper layer pressurizing electromagnetic valve and the upper layer negative pressure electromagnetic valve.
The lower cup structure 22 includes a lower cup 221 for containing the electrolyte and a second cup outflow port for the electrolyte to flow out from the lower cup 221, and a second flow stopping mechanism 222 is disposed in the lower cup 221, and the second flow stopping mechanism 222 is used for controlling the electrolyte to flow out from the second cup outflow port. The lower cup structure 22 further includes a lower plate 223, and the lower plate 223 is disposed on top of the lower cup 221 and is sealingly connected to the lower cup 221. The lower plate 223 is provided with a lower liquid passage 224 and a lower air intake passage 225, wherein the lower liquid passage 224 communicates the first cup outflow port and the cavity of the lower cup 221. The lower inlet channel 225 comprises a lower pressurizing channel, a lower pressure relief channel and a lower normal pressure channel, wherein a lower pressurizing electromagnetic valve is arranged in the lower pressurizing channel, a lower negative pressure electromagnetic valve is arranged in the lower pressure relief channel, and a lower normal pressure channel electromagnetic valve is arranged in the lower normal pressure channel. A liquid injection structure 226 is arranged at the outlet of the second cup body, and the liquid injection structure 226 is used for injecting electrolyte into the lithium battery N. The liquid filling structure 226 is arranged on the reference plate 228 of the frame 1, and plays a role in positioning and maintaining the stability of the liquid filling module 2. The upper cup 211 and the lower cup 221 described above need to be arranged off-axis. Preferably, the lower-layer pressurizing channel, the lower-layer pressure relief channel and the lower-layer normal pressure channel are combined into one channel, and different functions are realized through the upper-layer pressurizing electromagnetic valve, the lower-layer negative pressure electromagnetic valve and the lower-layer normal pressure channel electromagnetic valve.
The lithium battery tray module 3 comprises a supporting plate 31 for placing the lithium battery N to be injected, a lifting structure 32 is arranged below the supporting plate 31, and the lifting structure 32 drags the supporting plate 31 to move towards the direction of the liquid injection module 2. It should be emphasized that when the apparatus of the present application is used for filling liquid, a detachable liquid filling valve disclosed in CN202022823256.6 needs to be matched, and the detachable liquid filling valve M is screwed on the lithium battery N to be filled with liquid.
In order to prevent excessive air from being blown when the upper and lower cups 211 and 221 form positive pressure, which affects the quality of the electrolyte, a gas that does not react with the electrolyte, such as nitrogen, should be blown.
In this technical scheme, go up cup 211 and lower cup 221 off-axis setting to be provided with corresponding first stop mechanism 212 and second stop mechanism 222, can keep apart last cup 211 and lower cup 221, carry out the individual control, convenient operation and change, the cost is reduced. The liquid injection process is carried out in a pipeline mode, and the whole process from an electrolyte source to the pouring of the electrolyte into the lithium battery N is a sealing condition, so that the influence of air humidity on the electrode liquid is avoided, and the rejection rate of the electrolyte is reduced; on the other hand, the electrolyte injection operation is carried out under the sealing condition, so that the damage of the electrolyte to the body of an operator is avoided. The structures of the upper and lower cups 211 and 221 also increase the liquid injection efficiency.
Further, the present application also optimizes the upper cup structure 21 and the lower cup structure 22. Specifically, the upper cup structure 21 further includes an upper cavity base 216, the upper cavity base 216 being disposed between the upper cup 211 and the lower plate 223. The upper surface of the upper cavity base 216 is provided with a first conical lower liquid surface, which is formed by the downward depression of the upper surface of the upper cavity base 216, and the aforementioned first cup outflow hole is preferably provided at the bottom of the first conical lower liquid surface. In other words, the upper cup 211 is a cylinder without end surfaces at the top and bottom, the upper cover is provided with the upper plate 213, and the lower cover is provided with the upper cavity base 216. The upper cup 211, the upper plate 213 and the upper cavity base 216 are preferably in sealing connection with the prior art, so as to ensure the air tightness of the upper cup 211. The first flow stopping mechanism 212 includes a first liquid storage cylinder 2121, the first liquid storage cylinder 2121 is disposed on the upper plate 213, a first insert rod 2122 is connected to a movable end of the first liquid storage cylinder 2121, the first insert rod 2122 is located in the upper cup 211, and the first insert rod 2122 seals the outlet of the first cup under the pushing of the first liquid storage cylinder 2121 to control the electrolyte to flow out of the upper cup 211.
The lower cup structure 22 comprises a lower inner cavity base 227, the lower inner cavity base 227 is arranged at the lower end of the lower cup body 221, and a reference plate 228 connected with the frame 1 is connected below the lower inner cavity base 227. The upper surface of lower inner chamber base 227 is provided with the second cone liquid level that the concave formation in opposite directions, and the second cup outflow hole sets up the bottom of liquid level under the second cone. The second flow stopping mechanism 222 includes a second liquid storage cylinder 2221, the second liquid storage cylinder 2221 is disposed on the lower plate 223, a movable end of the second liquid storage cylinder 2221 is connected with a second plug rod 2222, the second plug rod 2222 is located in the lower cup 221, and the second cup outflow hole is plugged under the pushing of the second liquid storage cylinder 2221. Further, a flow stopping connection piece 2123 is disposed between the first liquid storage cylinder 2121 and the first insert rod 2122, and between the second liquid storage cylinder 2221 and the second insert rod 2222, an upper end of the flow stopping connection piece 2123 is connected with a movable end of the first liquid storage cylinder 2121 or the second liquid storage cylinder 2221, an upwardly recessed accommodating space is disposed at a lower end of the flow stopping connection piece 2123, a side hole is disposed at a lower end accommodating space of the flow stopping connection piece 2123, the side hole is horizontally communicated with the accommodating space, the first insert rod 2122 or the second insert rod 2222 slides into the accommodating space through the side hole, a protruding portion for preventing the first insert rod 2122 or the second insert rod 2222 from separating along an axial direction of the flow stopping connection piece 2123, that is, a relative position between the first insert rod 2122 or the second insert rod 2222 and the flow stopping connection piece 2123 in a longitudinal direction is determined, and preferably, bottom ends of the first insert rod 2122 and the second insert rod 2222 are subjected to tapering treatment.
In this technical solution, the first insert rod 2122 and the second insert rod 2222 are simple in structure, so that the first cup outflow opening and the second cup outflow opening are conveniently plugged, and the flow stopping connecting piece 2123 and the first insert rod 2122 or the second insert rod 2222 are convenient to detach and replace.
The liquid injection modules 2 include a plurality of liquid injection modules 2 arranged in a rectangular array. The liquid injection machine for the lithium battery further comprises an upper air pipe converging block 23 and a lower air pipe converging block 24, wherein the upper air pipe converging block 23 comprises a first main pipe, a plurality of first branch pipes and second branch pipes, the first branch pipes are communicated with the upper pressurizing channels of the liquid injection modules 2, the second branch pipes are communicated with the upper pressure releasing channels of the liquid injection modules 2, the lower air pipe converging block 24 comprises a second main pipe, a plurality of third branch pipes, a fourth branch pipe and a fifth branch pipe, the third branch pipes are communicated with the lower pressurizing channels of the liquid injection modules 2, the fourth branch pipes are communicated with the lower pressure releasing channels of the liquid injection modules 2, and the fifth branch pipes are communicated with the lower normal pressure channels of the liquid injection modules 2.
In this technical scheme, through the use of last trachea confluence piece 23 and lower trachea confluence piece 24, can carry out the pressure boost simultaneously to a plurality of notes liquid module 2, pressure release and keep the ordinary pressure to control, be convenient for control in batches. The corresponding first main pipeline and the second main pipeline are communicated with the vacuum blower to provide preparation for pressurization and pressure relief, and independent control is realized through corresponding electromagnetic valves arranged in the first branch pipeline to the fifth branch pipeline. Vacuum blower refers to a bi-directional blower with the capability of forming negative and positive pressure
To ensure the priming effect, the priming structure 226 includes a priming guide sleeve 2261 and a priming nozzle 2262, where the priming guide sleeve 2261 is used to initially adjust the removable priming valve M to align with the priming nozzle 2262. In order to ensure the guiding and aligning effects, an oblique angle is arranged on the inner wall of the bottom end of the liquid injection guiding sleeve 2261, so that the detachable liquid injection valve M can slide into the liquid injection guiding sleeve 2261. The aforementioned pouring spout 2262 is provided in the pouring guide 2261. The pouring spout 2262 communicates with the second cup outflow hole. The liquid filling nozzle 2262 includes a body 2262a and a protrusion 2262b disposed below the body 2262a, the body 2262a is provided with a liquid filling channel communicating with the second cup outflow hole, and a liquid filling side hole 2262c is formed in a side surface of the liquid filling channel, in this embodiment, the liquid filling side hole 2262c is formed on two sides of the protrusion 2262 b. Electrolyte flows out from two sides of the liquid injection nozzle 2262, is different from the conventional liquid injection nozzle 2262 which flows out in a straight line, reduces the direct impact on the detachable liquid injection valve M, and avoids the situation that the detachable liquid injection valve M cannot be closed due to the impact of the electrolyte which flows out in a straight line on the detachable liquid injection valve M when the detachable liquid injection valve M needs to be closed, so that the electrolyte is exposed in the air.
Further, the injection structure 226 further includes an injection fixing sleeve 2263, the injection fixing sleeve 2263 is disposed below the reference plate 228, the injection fixing sleeve 2263 is disposed in the injection guiding sleeve 2261, and the injection nozzle 2262 is disposed in the injection fixing sleeve 2263. In particular, the sprue bar 2263 is shaped to fit the shape of the sprue bar 2262, preferably in cross-section as a prototype. The injection fixing sleeve 2263 is annular, and the inner ring thereof is arranged in a stepped manner, and the injection nozzle 2262 is engaged in the injection fixing sleeve 2263 through a step.
In order to facilitate alignment of the lithium battery N in the liquid injection process, a plurality of upper guide cups 2281 are arranged below the reference plate 228, the liquid injection structure 226 is arranged in the upper guide cups 2281, the supporting plate 31 is provided with a lower guide cup 311, and the upper guide cups 2281 and the lower guide cup 311 are coaxially arranged. Preferably, the facing edges of the upper guide cup 2281 and the lower guide cup 311 are beveled. The lifting structure 32 pushes the supporting plate 31 to move toward the direction of the liquid injection module 2, so that the detachable liquid injection valve M contacts with the liquid injection nozzle 2262 and forms a sealed channel for supplying electrolyte into the inner cavity of the lithium battery N. The preferred lifting structure 32 is a jacking cylinder 321.
The invention also improves the lithium battery tray module 3, and specifically, the supporting plate 31 is provided with a guide hole 312 for lifting and lowering the guide cup at the lower guide cup 311, and the lower guide cup 311 is arranged at the edge of the guide hole 312. The lithium battery tray module 3 is further provided with a bottom plate 313, and the bottom plate 313 is disposed below the pallet 31. The bottom plate 313 is spaced apart from the pallet 31 and is maintained by support columns 314 disposed between the bottom plate 313 and the pallet 31. The bottom plate 313 is provided with a bottom through hole 3131, a stopper 3132 is provided in the bottom through hole 3131, the elastic abutting structure includes a slide column 3161, one end of the slide column 3161 is provided with a stopper block 315, the other end is provided with a reference block 3162, the slide column 3161 is provided in the bottom through hole 3131, and the sliding distance of the slide column 3161 is limited by the distance between the reference block 3162 and the stopper block 315. The reference block 3162 is configured to abut against the lithium battery N. A spring is also provided between the reference block 3162 and the stopper 3132. Preferably, the reference block 3162 is provided with a downwardly recessed lithium battery post hole 3162a. The elastic abutment mechanism 316 pushes the lithium battery N up and down in the lower guide cup 311. Due to the existence of the elastic abutting mechanism 316, the situation that the lithium battery N is pressed and deformed in the lifting process is avoided, and further, the damage between the liquid injection nozzle 2262 and the detachable liquid injection valve M in the liquid injection process is avoided, so that liquid injection failure or unqualified electrolyte injection is caused.
In order to facilitate feeding and discharging, the fixed end of the lifting mechanism is connected with the frame 1, the movable end of the lifting cylinder is connected with a sliding plate 322, two parallel sliding grooves are formed in the sliding plate 322, sliding rails are arranged on the lower surface of the bottom plate 313, and the sliding rails are arranged in the sliding grooves. By pushing and pulling the bottom plate 313, not only feeding and discharging can be realized, but also the positions of the upper guide cup 2281 and the lower guide cup 311 can be adjusted to facilitate liquid injection.
The utility model provides a annotate liquid machine for lithium cell can also include electrical system, electrical system with upper strata pressure boost solenoid valve, upper strata negative pressure solenoid valve, first stop current mechanism 212, second stop current mechanism 222, lower floor pressure boost solenoid valve, lower floor negative pressure solenoid valve, lower floor ordinary pressure solenoid valve, elevation structure 32 signal connection, this kind of signal connection can be through wired mode such as paired line, also can be through wireless mode such as WIFI, bluetooth connect.
The application also provides a use method, and the application of the liquid injection machine for the lithium battery comprises the following steps with reference to fig. 10:
s0. the lithium batteries N are mounted on the tray, and a detachable liquid injection valve M is mounted for each lithium battery N, so that the lithium battery N on the supporting plate 31 is kept away from the liquid injection structure 226, and the upper cup 211 and the lower cup 221 are kept in a normal pressure state;
s1, closing a first flow stopping mechanism 212, opening a second flow stopping mechanism 222, pushing a supporting plate 31 to move upwards until an attachable and detachable liquid injection valve is in contact with a liquid injection structure 226 to form a sealing channel, and vacuumizing a lower cup 221 to enable cavities of the lower cup 221 and a lithium battery N to be in a negative pressure state; in the step, the cavity of the lithium battery N is treated into a negative pressure state in advance, so that electrolyte can flow into the cavity of the lithium battery N conveniently under the action of negative pressure. The lower cup 221 presents negative pressure, and a negative pressure environment is formed in the lower cup 221 by closing the N valve of the lower-layer booster lithium battery and the lower-layer normal pressure electromagnetic valve and opening the lower-layer negative pressure electromagnetic valve.
S2, closing the first flow stopping mechanism 212, opening the second flow stopping mechanism 222, and enabling the supporting plate 31 to move downwards so as to enable the lithium battery N to be separated from the liquid injection structure 226, and discharging vacuum from the lower cup 221; the supporting plate 31 drives the lithium battery N to be separated from the liquid injection structure 226226, so that the inner cavity of the lithium battery N is maintained to be in a negative pressure state, and electrolyte is injected into the upper cup 211 and the lower cup 221. In the step, the lower layer negative pressure electromagnetic valve is also required to be closed, and the normal pressure electromagnetic valve is also required to be opened.
S3, opening the first flow stopping mechanism 212, closing the second flow stopping mechanism 222, enabling the upper cup body 211 and the lower cup body 221 to be in a normal pressure state, and injecting electrolyte; in this step, an external electrolyte source enters the upper cup 211 and flows into the lower cup 221 by gravity of the electrolyte.
S4, keeping the first flow stopping mechanism 212 to be opened and the second flow stopping mechanism 222 to be closed, and performing pressurization treatment on the upper cup body 211; because electrolyte has certain residual quantity in the upper cup 211 flowing into the lower cup 221, the pressure in the upper cup 211 can be gradually increased by closing the lower normal pressure electromagnetic valve and opening the upper pressure electromagnetic valve, the electrolyte remained in the upper cup 211 is blown into the lower cup 221, and the lower cup 221 simultaneously presents a positive pressure state.
S5, closing the first flow stopping mechanism 212, keeping the second flow stopping mechanism 222 in a closed state, and releasing pressure of the upper cup body 211 in a vacuum state; the upper cup 211 is evacuated by the upper negative pressure solenoid valve to prepare for the next round of liquid injection.
S6, keeping the first flow stopping mechanism 212 closed, lifting the lifting mechanism, enabling the detachable liquid injection valve to be in contact with the liquid injection structure 226226 to form a sealing channel, opening the second flow stopping mechanism 222, and enabling electrolyte to flow into the cavity of the lithium battery N because the cavity of the lithium battery N is negative pressure;
s7, pressurizing the lower cup body 221 by opening a lower pressurizing electromagnetic valve, and fully pressing electrolyte into the inner cavity of the lithium battery N;
s8, keeping the first flow stopping mechanism 212 closed, opening the second flow stopping mechanism 222, performing negative pressure treatment on the lower cup 221, and pumping the electrolyte and the gas generated by the pole piece of the lithium battery N into the lower cup 221 to avoid the danger of expanding and breaking when the gas is accumulated in the lithium battery N;
s9, keeping the first flow stopping mechanism 212 closed, opening the second flow stopping mechanism 222, discharging vacuum from the lower cup 221, and discharging the electrolyte in the step S8 and the gas generated by the pole piece of the lithium battery N out of the lower cup 221;
s10, keeping the first flow stopping mechanism 212 closed, opening the second flow stopping mechanism 222, pressurizing the lower cup 221, and pressing electrolyte remained in the lower cup 221 into the inner cavity of the lithium battery N, wherein the same is used for improving the accuracy of the liquid injection amount;
s11, keeping the first flow stopping mechanism 212 closed, opening the second flow stopping mechanism 222, and performing pressure relief treatment on the lower cup 221 to enable the inner cavity of the lithium battery N to be in a normal pressure state;
s12, the first flow stopping mechanism 212 and the second flow stopping mechanism 222 are closed, and the lifting mechanism descends, the detachable liquid injection valve is separated from the liquid injection structure 226226, and the liquid injection is completed.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (9)
1. A liquid injector for a lithium battery, comprising:
a frame (1);
the electrolyte injection module (2) is arranged above the rack (1) and comprises an upper cup structure (21) and a lower cup structure (22), the upper cup structure (21) comprises an upper cup body (211) for containing electrolyte and a first cup body outflow opening for enabling the electrolyte to flow out of the upper cup body (211), and a first flow stopping mechanism (212) for stopping the electrolyte from flowing out of a first cup body outflow hole is arranged in the upper cup body (211); the upper cup structure (21) further comprises an upper layer plate (213), the upper layer plate (213) is arranged at the top of the upper cup body (211), an upper layer air inlet channel (214) and a liquid inlet channel (215) communicated with electrolyte are arranged on the upper layer plate (213), the liquid inlet channel (215) and the upper layer air inlet channel (214) are both communicated with a cavity formed by the upper cup body (211), the upper layer air inlet channel (214) comprises an upper layer pressurizing channel and an upper layer pressure relief channel, an upper layer pressurizing electromagnetic valve is arranged in the upper layer pressurizing channel, and an upper layer negative pressure electromagnetic valve is arranged in the upper layer pressure relief channel;
the lower cup structure (22) comprises a lower cup body (221) for containing electrolyte and a second cup body outflow opening for enabling the electrolyte to flow out of the lower cup body (221), a second flow stopping mechanism (222) for stopping the electrolyte from flowing out of the second cup body outflow opening is arranged in the lower cup body (221), the lower cup structure (22) further comprises a lower layer plate (223), the lower layer plate (223) is arranged at the top of the lower cup body (221), the lower layer plate (223) is provided with a lower liquid channel (224) and a lower layer air inlet channel (225), the lower liquid channel (224) is communicated with a first cup body outflow hole and a cavity formed by the lower cup body (221), the lower-layer air inlet channel (225) is communicated with a cavity formed by the lower cup body (221), the lower-layer air inlet channel (225) comprises a lower-layer pressurizing channel, a lower-layer pressure relief channel and a lower-layer normal pressure channel, a lower-layer pressurizing electromagnetic valve is arranged in the lower-layer pressurizing channel, a lower-layer negative pressure electromagnetic valve is arranged in the lower-layer pressure relief channel, a lower-layer normal pressure electromagnetic valve is arranged in the lower-layer normal pressure channel, a second cup body outflow opening is provided with a liquid injection structure (226) for injecting electrolyte into the lithium battery (N), and the upper cup body (211) and the lower cup body (221) are arranged in an off-axis manner;
the lithium battery tray module (3) is arranged below the rack (1) and comprises a supporting plate (31) for placing a lithium battery (N), a lifting structure (32) is arranged below the supporting plate (31), and the lifting structure (32) pushes the supporting plate (31) to move towards the liquid injection module (2);
the first flow stopping mechanism (212) comprises a first liquid storage cylinder (2121), the first liquid storage cylinder (2121) is arranged on the upper layer plate (213), a first inserting rod (2122) is connected to the movable end of the first liquid storage cylinder (2121), and the first inserting rod (2122) is positioned in the upper cup body (211) and can be used for blocking a first cup body outflow hole under the pushing of the first liquid storage cylinder (2121);
the second flow stopping mechanism (222) comprises a second liquid storage cylinder (2221), the second liquid storage cylinder (2221) is arranged on the lower layer plate (223), the movable end of the second liquid storage cylinder (2221) is connected with a second inserting rod (2222), and the second inserting rod (2222) is positioned in the lower cup body (221) and can be used for blocking a second cup body outflow hole under the pushing of the second liquid storage cylinder (2221);
the liquid injection structure (226) comprises a liquid injection guide sleeve (2261), a liquid injection nozzle (2262) is arranged in the liquid injection guide sleeve (2261), the liquid injection nozzle (2262) is communicated with the second cup outflow hole, the liquid injection nozzle (2262) comprises a body (2262 a) and a protrusion (2262 b) arranged below the body (2262 a), the body (2262 a) is provided with a liquid injection channel communicated with the second cup outflow hole, and a liquid injection side hole (2262 c) is formed in the side surface of the liquid injection channel;
the bottom ends of the first plunger (2122) and the second plunger (2222) are tapered.
2. The liquid injector for lithium batteries according to claim 1, wherein: the upper cup structure (21) further comprises an upper inner cavity base (216), the upper inner cavity base (216) is arranged between the upper cup body (211) and the lower layer plate (223), the upper surface of the upper inner cavity base (216) is recessed downwards to form a first conical lower liquid level, and the first cup body outflow hole is arranged at the bottom of the first conical lower liquid level; the lower cup structure (22) comprises a lower inner cavity base (227), the lower inner cavity base (227) is arranged at the lower end of the lower cup body (221), a reference plate (228) is connected below the lower inner cavity base (227), the reference plate (228) is fixed on the frame (1), the upper surface of the lower inner cavity base (227) is downwards sunken to form a second conical lower liquid level, and the second cup outflow hole is formed in the bottom of the second conical lower liquid level.
3. The liquid injector for lithium batteries according to claim 2, wherein: the novel anti-backflow device is characterized in that a flow-stopping connecting piece (2123) is adopted between the first liquid storage cylinder (2121) and the first inserting rod (2122), between the second liquid storage cylinder (2221) and the second inserting rod (2222), the upper end of the flow-stopping connecting piece (2123) is connected with the movable end of the first liquid storage cylinder (2121) or the movable end of the second liquid storage cylinder (2221), an upwards-sunken accommodating space is formed in the lower end of the flow-stopping connecting piece (2123), a side hole is formed in the side wall of the flow-stopping connecting piece, the side hole is communicated with the accommodating space, and the first inserting rod (2122) or the second inserting rod (2222) slides into the accommodating space through the side hole and limits the relative positions of the first inserting rod (2122) and the second inserting rod (2222) and the connecting piece in the longitudinal direction.
4. A liquid injector for lithium batteries according to claim 3, characterized in that: annotate liquid module (2) including a plurality ofly, a plurality of notes liquid module (2) are rectangular array and arrange for annotate liquid machine of lithium cell still includes trachea confluence piece (23) and lower trachea confluence piece (24), go up trachea confluence piece (23) and including first trunk line and a plurality of first branch pipelines and the second branch pipeline of first trunk line intercommunication, the upper pressure boost passageway intercommunication of each notes liquid module (2) of first branch pipeline, the upper pressure release passageway intercommunication of second branch pipeline and each notes liquid module (2), lower trachea confluence piece (24) include second trunk line and a plurality of third branch pipeline, fourth branch pipeline and the fifth branch pipeline of second trunk line intercommunication, the lower floor pressure boost passageway of each notes liquid module (2) of third branch pipeline intercommunication, the lower pressure release passageway of each notes liquid module (2) of fifth branch pipeline intercommunication.
5. The liquid injector for lithium batteries according to claim 4, wherein: annotate liquid structure (226) still include annotate fixed cover (2263), annotate fixed cover (2263) setting in the below of datum plate (228), annotate fixed cover (2263) for the ring form, annotate the inner ring of fixed cover (2263) of liquid and be the echelonment, annotate the inner ring of fixed cover (2263) of liquid and be used for block annotating liquid mouth (2262).
6. The liquid injector for lithium batteries according to claim 5, wherein: a plurality of upper guide cups (2281) are arranged below the reference plate (228), each liquid injection structure (226) is arranged in each upper guide cup (2281), a lower guide cup (311) is arranged above the supporting plate (31), the lower guide cups (311) are arranged corresponding to the upper guide cups (2281), and the upper guide cups (2281) and the lower guide cups (311) are coaxially arranged.
7. The liquid injector for lithium batteries according to claim 6, wherein: the lithium battery tray module (3) is further provided with a bottom plate (313), the bottom plate (313) is arranged below the supporting plate (31), a supporting column (314) is arranged between the bottom plate (313) and the supporting plate (31), two ends of the supporting column (314) are respectively connected with the bottom plate (313) and the supporting plate (31), the bottom plate (313) is provided with an elastic abutting mechanism (316) and a bottom through hole (3131), a limiting block (3132) is arranged in the bottom through hole (3131), the elastic abutting mechanism (316) comprises a sliding column (3161), one end of the sliding column (3161) is provided with a limiting abutting block (315), the other end of the sliding column is provided with a reference block (3162) abutting the lithium battery (N), the sliding column (3161) penetrates through the bottom through hole (3131) and is connected with the limiting block (3132) in a abutting mode, and the limiting block (3162) is further provided with a limiting block (3132) in a downward direction, and the limiting block (3162) is further provided with a limiting block (3132).
8. The liquid injector for lithium batteries according to claim 7, wherein: the lifting mechanism comprises a lifting cylinder (321), the fixed end of the lifting cylinder (321) is connected with the frame (1), the movable end of the lifting cylinder (321) is connected with a sliding plate (322), two parallel sliding grooves are formed in the upper surface of the sliding plate (322), sliding rails are arranged on the lower surface of the bottom plate (313), and the sliding rails are arranged in the sliding grooves in a sliding manner to adjust the coaxiality of the upper guide cup (2281) and the lower guide cup (311).
9. A method for filling a lithium battery, using the filling machine for a lithium battery according to any one of claims 1 to 8, comprising:
s0. the lithium batteries (N) are arranged on the tray, a detachable liquid injection valve (M) is arranged for each lithium battery (N), the lithium battery (N) on the supporting plate (31) is kept away from the liquid injection structure (226), and the upper cup body (211) and the lower cup body (221) are kept in a normal pressure state;
s1, closing a first flow stopping mechanism (212), opening a second flow stopping mechanism (222), pushing a supporting plate (31) to move upwards until an attachable and detachable liquid injection valve is in contact with a liquid injection structure (226) to form a sealing channel, and vacuumizing a lower cup body (221) to enable cavities of the lower cup body (221) and a lithium battery (N) to be in a negative pressure state;
s2, closing the first flow stopping mechanism (212), opening the second flow stopping mechanism (222), enabling the supporting plate (31) to move downwards to enable the lithium battery (N) to be separated from the liquid injection structure (226), and discharging vacuum from the lower cup body (221);
s3, opening the first flow stopping mechanism (212), closing the second flow stopping mechanism (222), enabling the upper cup body (211) and the lower cup body (221) to be in a normal pressure state, and injecting electrolyte into the upper cup body (211);
s4, keeping the first flow stopping mechanism (212) open and the second flow stopping mechanism (222) closed, and performing supercharging treatment on the upper cup body (211);
s5, closing the first flow stopping mechanism (212), keeping the second flow stopping mechanism (222) in a closed state, and releasing pressure of the upper cup body (211) in a vacuum state;
s6, keeping the first flow stopping mechanism (212) closed, lifting the lifting mechanism, enabling the detachable liquid injection valve to be in contact with the liquid injection structures (226) (226) and form a sealing channel, opening the second flow stopping mechanism (222), and enabling electrolyte to flow into a cavity of the lithium battery (N);
s7, pressurizing the lower cup body (221), and fully pressing electrolyte into the inner cavity of the lithium battery (N);
s8, keeping the first flow stopping mechanism (212) closed, opening the second flow stopping mechanism (222), and carrying out negative pressure treatment on the lower cup body (221), so that the electrolyte and the gas generated by the pole piece of the lithium battery (N) are pumped into the lower cup body (221);
s9, keeping the first flow stopping mechanism (212) closed, opening the second flow stopping mechanism (222), discharging vacuum from the lower cup body (221), and discharging gas generated by the electrolyte in the step S8 and the pole piece of the lithium battery (N) out of the lower cup body (221);
s10, keeping a first flow stopping mechanism (212) closed, opening a second flow stopping mechanism (222), performing pressurization treatment on a lower cup body (221), and pressing electrolyte remained in the lower cup body (221) into an inner cavity of a lithium battery (N);
s11, keeping the first flow stopping mechanism (212) closed, opening the second flow stopping mechanism (222), and performing pressure relief treatment on the lower cup body (221) to enable the inner cavity of the lithium battery (N) to be in a normal pressure state;
s12, closing the first flow stopping mechanism (212) and the second flow stopping mechanism (222), and enabling the lifting mechanism to descend, the detachable liquid injection valve and the liquid injection structures (226) and (226) to be separated, so that the current liquid injection is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111501814.XA CN114188679B (en) | 2021-12-09 | 2021-12-09 | Liquid injection machine for lithium battery and application method of liquid injection machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111501814.XA CN114188679B (en) | 2021-12-09 | 2021-12-09 | Liquid injection machine for lithium battery and application method of liquid injection machine |
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| CN114188679A CN114188679A (en) | 2022-03-15 |
| CN114188679B true CN114188679B (en) | 2024-03-22 |
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| CN114188679A (en) | 2022-03-15 |
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