CN109817878A - A kind of lithium battery liquid injection system and electrolyte filling method - Google Patents
A kind of lithium battery liquid injection system and electrolyte filling method Download PDFInfo
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- CN109817878A CN109817878A CN201910210718.6A CN201910210718A CN109817878A CN 109817878 A CN109817878 A CN 109817878A CN 201910210718 A CN201910210718 A CN 201910210718A CN 109817878 A CN109817878 A CN 109817878A
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- battery
- battery core
- vacuum
- conveyer
- fluid injection
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- 238000002347 injection Methods 0.000 title claims abstract description 128
- 239000007924 injection Substances 0.000 title claims abstract description 128
- 239000007788 liquid Substances 0.000 title claims abstract description 42
- 239000003792 electrolyte Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 34
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- 239000012530 fluid Substances 0.000 claims abstract description 104
- 238000007600 charging Methods 0.000 claims abstract description 58
- 230000037452 priming Effects 0.000 claims abstract description 38
- 238000005086 pumping Methods 0.000 claims description 20
- 238000001802 infusion Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003028 elevating effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 2
- 238000005868 electrolysis reaction Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 230000005693 optoelectronics Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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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
-
- 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
Abstract
The invention discloses a kind of lithium battery liquid injection system and electrolyte filling methods, and the falsework including conveyer and for fixing the conveyer, the system further includes priming device, charging unit and vacuum evacuation device, have been spaced apart pallet on the conveyer belt of the conveyer；Several battery battery cores are placed on the pallet；The electrolyte filling method of the system is using reasonable fluid injection and vacuumizes number, and after increase charging process, chemical electrolysis matter is reacted in advance, so that cell gas discharge is reduced inner pressure of battery, keep battery safer, increases battery capacity, cycle charge-discharge number increases, and prolongs the service life.
Description
Technical field
The present invention relates to battery processing technique field, especially a kind of lithium battery liquid injection system and electrolyte filling method.
Background technique
With the development of modern society, lithium battery using more and more extensive.Lithium battery needs to lead to during production
The liquid injection hole injection electrolyte opened up thereon is crossed, needs to take some time when carrying out fluid injection to lithium battery, and existing
It is vacuumized after the exactly first fluid injection that some electrolyte filling methods generally use, this method intercell battery core has certain defect, holds
Amount is not high, and the service life is short.Therefore, it is badly in need of designing a kind of new electrolyte filling method and liquid injection system.
Summary of the invention
To solve the above problems, the invention discloses a kind of lithium battery liquid injection system, including conveyer and
For fixing the falsework of the conveyer, which further includes priming device, charging unit and vacuum evacuation device, the conveying
Pallet has been spaced apart on the conveyer belt of machine；Several battery battery cores are placed on the pallet；
The priming device includes fluid injection frame, and fluid injection frame lower section is fixed with mobile mechanism, the moving machine by link block
Structure includes mobile screw rod, and one end of mobile screw rod is connected with motor, is threaded with movable stand on mobile screw rod, which connects
Several filling heads are connected to, the filling head is connected to topping-up pump by hose, and the input end of topping-up pump is connected with electrolyte tank；Institute
It is corresponding with the battery battery core to state filling head；
The vacuum evacuation device includes fixed frame, and fixed frame includes fixed plate, is equipped with cylinder at the top of the fixed plate,
The telescopic end of the cylinder passes through the fixed plate and is connected with vacuum (-tight) housing, and the vacuum (-tight) housing is connected with vacuum pump by pipeline, described
Fixed plate lower end is equipped with support column, which fixes with the falsework；
The fluid injection frame is fixedly arranged above cross bar, and the upper surface of the cross bar is equipped with several guide devices；The cross bar is living
The dynamic both ends that the falsework column is set；The guide device includes the sliding block for being mounted on the cross bar upper surface, the cunning
Block is threaded with screw rod, and screw rod is fixed on the crossbeam of the falsework, and one end of the screw rod is connected with servo motor；
The charging unit includes top plate, and top plate is equipped with the charging connector for charging to battery battery core, is pushing up
Elevating mechanism is additionally provided with above plate, which is fixed on the falsework；
The filling head includes spike body, and the spike body has the syringe needle head for being directed at battery battery core liquid injection port
Portion and the syringe needle tail portion connecting with the hose, the syringe needle head have liquid outlet, and the syringe needle tail portion has inlet,
The spike body is internally provided with the infusion channel for being connected to the liquid outlet and the inlet, the infusion channel
Side wall is equipped with buffer structure close to the syringe needle head position, and the buffer structure is used to slow down the electrolysis in the infusion channel
The flow velocity of liquid.
Preferably, the buffer structure is the buffer groove of the recessed inner wall in the infusion channel of annular.
Preferably, the buffer groove is that helicitic texture or diameter flow to the peak structure being gradually reduced along liquid.
Preferably, the open end of the vacuum (-tight) housing is equipped with sealing ring.
Preferably, the elevating mechanism is pneumatic actuation component and/or hydraulic driving part and/or electric drive component.
Preferably, the priming device is at least provided with 5 groups.
Preferably, the vacuum evacuation device is at least provided with 8 groups.
A kind of electrolyte filling method of lithium battery comprising the steps of:
S1: fluid injection: battery battery core is placed in the pallet, and using priming device, filling head is to battery battery core
The inside starts fluid injection, and reservoir quantity is the 5-20% of battery battery core capacity；
S2: once vacuumize: it is corresponding to be delivered to vacuum evacuation device by starting conveyer for the battery battery core after a fluid injection
At position, starts vacuum pump, once vacuumized, vacuum pressure value are as follows: 15 to -25Kpa, keep 30-50s；
S3: secondary fluid injection: conveyer continues for the battery battery core after once vacuumizing to be transferred at priming device, is infused
The secondary fluid injection of liquid head, reservoir quantity are the 10-20% of battery battery core capacity；
S4: secondary vacuum pumping: conveyer continues for the battery battery core after secondary fluid injection to be transferred at vacuum evacuation device, starting
Vacuum pump carries out secondary vacuum pumping, vacuum pressure value are as follows: and 55 to -90Kpa, keep 30-50s；
S5: fluid injection three times: conveyer continues for the battery battery core after secondary vacuum pumping to be transferred at priming device, filling head
Fluid injection three times is carried out, reservoir quantity is the 20-30% of battery battery core capacity；
S6: vacuumize three times: conveyer continues for the battery battery core after fluid injection to be three times transferred at vacuum evacuation device, starting
Vacuum pump is vacuumized three times, vacuum pressure value are as follows: and 55 to -90Kpa, keep 30-50s；
S7: four fluid injections: conveyer continues for the battery battery core after vacuumizing three times to be transferred at priming device, filling head
Four fluid injections are carried out, reservoir quantity is the 10-20% of battery battery core capacity；
S8: vacuumize twice in succession: conveyer, which continues the battery battery core after four fluid injections being transferred to two, to be set side by side
Vacuum evacuation device at, start vacuum pump, carry out secondary vacuum pumping, vacuum pressure value are as follows: 60 to -98Kpa, keep 30-50s；
S9: five fluid injections: conveyer continues that treated that battery battery core is transferred at priming device by step S8, carries out five
Secondary fluid injection, reservoir quantity are the 10-20% of battery battery core capacity；
S10: vacuumize again: conveyer continues that treated that battery battery core is transferred to vacuum evacuation device by step S9
Place starts vacuum pump, is vacuumized again, vacuum pressure value are as follows: and 60 to -98Kpa, keep 30-50s；
S11: precharge: conveyer continues that treated that battery battery core is transferred to the charging unit by step S9, uses
Charging connector clamps the electrode of battery battery core, is pre-charged, charging current: 0.1-0.5C, charging voltage: 2.75-3.0V,
Charging time: 5-7min；
S12: vacuumize twice in succession: conveyer continues that treated that battery battery core is transferred to vacuum means by step S11
Place is set, starts vacuum pump, is vacuumized again, vacuum pressure value are as follows: 60 to -98Kpa, keep 30-50s；
S13: sealing storage.
Further, relative humidity≤1% of the fluid injection environment of the electrolyte filling method.
Further, the fluid injection environment temperature of the electrolyte filling method is 22-28 DEG C.
Beneficial effects of the present invention: (1) after the present invention increases charging process, chemical electrolysis matter is reacted in advance, can
Battery capacity is effectively increased, cycle charge-discharge number increases, prolongs the service life；(2) electricity is made using fluid injection process of the present invention
Bubble in solution liquid is gradually discharged, and improves the vacuum degree in battery, and internal pressure reduces, and security performance improves；(3) in infusion channel
Buffer structure is set between liquid outlet and inlet, during injecting electrolyte, electrolyte is carried out using buffer structure
It is sprayed from the liquid outlet of infusion channel after buffering, reduces the flow velocity of the electrolyte at liquid outlet, avoid the speed mistake of electrolyte
Lead to electrolyte appearance the phenomenon that spluttering during fluid injection fastly.Due to reducing the output speed of the electrolyte of liquid outlet,
The convenient control to electrolyte output quantity, realizes efficient fluid injection during fluid injection, reduces the excessive phenomenon of electrolyte, avoids
The shell of battery is corroded, and improves yield rate, and is conducive to optimize production environment；(4) present invention is using reasonable number to electricity
Pond battery core carries out fluid injection and vacuumizes, and is infiltrated completely after electrolyte injection, reduces the percentage of lithium battery interior free state electrolyte
Than；(5) electrolyte filling method can also also guarantee that the lithium battery in fluid injection and after fluid injection charges completely in vacuum environment；?
Carrying out vacuumizing again after precharge preferably the gas generated when charging to be discharged, so that anode, diaphragm, cathode are snugly
It is even closer, first charge discharge efficiency and capacity are improved, the electrical properties such as internal resistance, high rate performance, the cycle life of lithium battery are improved.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural schematic diagram of priming device and vacuum evacuation device of the present invention；
Fig. 3 is the side view of priming device of the present invention；
Fig. 4 is the structural schematic diagram of mobile mechanism of the present invention；
Fig. 5 is the structural schematic diagram of charging unit of the present invention；
Fig. 6 is the structural schematic diagram of filling head of the present invention；
Fig. 7 is the structural schematic diagram of guide device of the present invention；
Fig. 8 is electrolyte filling method flow chart of the present invention；
In figure, 100- priming device, 200- vacuum evacuation device, 300- charging unit, 1- conveyer belt, 2- fixed plate, 3- gas
Cylinder, 4- cross bar, 5- support column, 6- telescopic end, 7- vacuum (-tight) housing, 8- guide device, 801- sliding block, 803- screw rod, 804- servo electricity
Machine, 9- fluid injection frame, 901- link block, the mobile screw rod of 902-, 903- motor, 10- movable stand, 11- filling head, 1101- syringe needle head
Portion, 1102- syringe needle tail portion, 1103- infusion channel, 1104- buffer structure, 12- pallet, 13- battery battery core, 14- top plate, 15-
Charging connector, 16 falseworks, 17- fixed column, 18- hydraulic cylinder.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Embodiment 1
As shown in Figure 1, 2, a kind of lithium battery liquid injection system, the falsework including conveyer and for fixing the conveyer
16, which further includes priming device 100, charging unit 300 and vacuum evacuation device 200, on the conveyer belt 1 of the conveyer
It has been spaced apart pallet 12；Several battery battery cores 13 are placed on the pallet 12；
As shown in Figure 3,4, the priming device 100 includes fluid injection frame 9, is fixed with below fluid injection frame 9 by link block 901
Mobile mechanism, the mobile mechanism include mobile screw rod 902, and one end of mobile screw rod 902 is connected with motor 903, mobile screw rod
Movable stand 10 is threaded on 902, which is connected with several filling heads 11, and the filling head 11 is connected by hose
To topping-up pump, the input end of topping-up pump is connected with electrolyte tank；The filling head is corresponding with the battery battery core 13；
The vacuum evacuation device 200 includes fixed frame, and fixed frame includes fixed plate 2, and the top of the fixed plate 2 is equipped with
Cylinder 3, the telescopic end 6 of the cylinder 3 pass through the fixed plate 2 and are connected with vacuum (-tight) housing 7, and the vacuum (-tight) housing 7 is connected with by pipeline
Vacuum pump, 2 lower end of fixed plate are equipped with support column 5, and the support column 5 and the falsework 16 are fixed, when specifically used, starting
Cylinder 3, telescopic end 6 will drive vacuum (-tight) housing 7 to move down, so that vacuum (-tight) housing 7 covers the pallet 12, and be sealed against, so
After start vacuum pump, vacuumized；
As shown in fig. 7, the fluid injection frame 9 is fixedly arranged above cross bar 4, the upper surface of the cross bar 4 is filled equipped with several correctings
Set 8；The cross bar 4 is movably arranged on the both ends of 16 column of falsework；The guide device 8 includes being mounted on the cross bar
The sliding block 801 of 4 upper surfaces, the sliding block 801 are threaded with screw rod 803, and screw rod 803 is fixed on the crossbeam of the falsework 16
On, one end of the screw rod 803 is connected with servo motor 804, the setting can further increase system operation accuracy and
Stability, when specifically used, servo motor 804 starts, and screw rod 803 is mobile to drive cross bar 4 mobile with movable slider 801, horizontal
Bar 4 will drive fluid injection frame 9 mobile；
As shown in figure 5, the charging unit 300 includes top plate 14, top plate 14 is equipped with for carrying out to battery battery core 13
The charging connector 15 of charging is additionally provided with elevating mechanism in the top of top plate 4, which is fixed on the falsework 16；
As shown in fig. 6, the filling head 11 includes spike body, the spike body has for being directed at battery battery core note
The syringe needle head 1101 of liquid mouth and the syringe needle tail portion 1102 connecting with the hose, the syringe needle head 1101 have liquid
Mouthful, the syringe needle tail portion 1102 has an inlet, and the spike body is internally provided with the connection liquid outlet and described
The side wall of the infusion channel 1103 of inlet, the infusion channel 1103 is equipped with buffer structure close to the syringe needle head position
1104。
When it is implemented, the buffer structure 1104 is the buffer groove of the recessed inner wall in the infusion channel of annular,
Also it can also be that helicitic texture or diameter flow to the peak structure being gradually reduced along liquid.
Specifically, the open end of the vacuum (-tight) housing 7 is equipped with sealing ring.
Also in further embodiments, the elevating mechanism is pneumatic actuation component and/or hydraulic driving part and/or electricity
Dynamic driving part, specifically, as shown in figure 5, being fixed with fixed column on falsework 16, the upper end of the top plate is connected with hydraulic
Cylinder, hydraulic cylinder are fixed in the fixed column by fixing piece；When it is implemented, the charging unit is according to production line production capacity
It needs, multiple groups charging unit can be set, but also in some embodiments, have additional controlling terminal, be equipped in controlling terminal
Controller, corresponding position is equipped with optoelectronic switch inductor, the optoelectronic switch inductor and cylinder, hydraulic cylinder on the cross bar 4
18, conveyer, motor 903, servo motor 804 are connect with the controller electric signal；In use, working as conveyer for tray conveying
To charging unit, induction information is sent to controller by optoelectronic switch inductor, and controller will send enabled instruction to described
Hydraulic cylinder, hydraulic cylinder decline top plate 14, clamp the electrode of battery battery core 13 using charging connector, are pre-charged, are charged
Parameter can in controlling terminal software program, specifically can be PLC programming carry out preset value, charge parameter include: charging current,
Charging voltage and charging time.
Specifically, the priming device 100 is at least provided with 5 groups.
Specifically, the vacuum evacuation device 200 is at least provided with 8 groups.
Embodiment 2
As shown in figure 8, a kind of electrolyte filling method of lithium battery comprising the steps of:
S0: having the lithium battery liquid injection system of embodiment 1, when it is implemented, being not limited to the embodiment 1 liquid injection system；
S1: fluid injection: battery battery core 13 is placed in the pallet, using priming device 100, to battery battery core 13
The inside starts fluid injection, and reservoir quantity is the 15% of battery battery core capacity；
S2: once vacuumize: the battery battery core 13 after a fluid injection is delivered to vacuum evacuation device 200 by starting conveyer
At corresponding position, start vacuum pump, once vacuumized, vacuum pressure value are as follows: -20Kpa keeps 30s；
S3: secondary fluid injection: conveyer continues for the battery core after once vacuumizing to be transferred at priming device 100, carries out two
Secondary fluid injection, reservoir quantity are the 25% of battery battery core capacity；
S4: secondary vacuum pumping: conveyer continues for the battery battery core after secondary fluid injection to be transferred at vacuum evacuation device 200,
Start vacuum pump, carry out secondary vacuum pumping, vacuum pressure value are as follows: -70Kpa keeps 30s；
S5: fluid injection three times: conveyer continues for the battery battery core after secondary vacuum pumping to be transferred at priming device 100, into
Row fluid injection three times, reservoir quantity are the 20% of battery battery core capacity；
S6: vacuumize three times: conveyer continues for the battery battery core after fluid injection to be three times transferred at vacuum evacuation device 200,
Start vacuum pump, vacuumized three times, vacuum pressure value is -90Kpa, keeps 30s；
S7: four fluid injections: conveyer continues for the battery battery core after vacuumizing three times to be transferred at priming device 100, into
Four fluid injections of row, reservoir quantity are the 20% of battery battery core capacity；
S8: vacuumize twice in succession: conveyer, which continues the battery battery core after four fluid injections being transferred to two, to be set side by side
Vacuum evacuation device 200 at, start vacuum pump, carry out secondary vacuum pumping, vacuum pressure value are as follows: -98Kpa, keep 30s；
S9: five fluid injections: conveyer continues that treated that battery battery core is transferred at priming device 100 by step S8, into
Five fluid injections of row, reservoir quantity are the 20% of battery battery core capacity；
S10: vacuumize again: conveyer continues that treated that battery battery core is transferred to vacuum evacuation device by step S9
At 200, start vacuum pump, vacuumized again, vacuum pressure value are as follows: -98Kpa keeps 30s；
S11: precharge: conveyer continues that treated that battery battery core is transferred to the charging unit 300 by step S9, opens
The electrode of battery battery core 13 is clamped, is pre-charged, charging current by hydrodynamic cylinder pressure, top plate decline, charging connector 15: 0.1C,
Charging voltage: 3.0V, charging time: 5min；
S12: vacuumize twice in succession: conveyer continues that treated that battery battery core is transferred to vacuum means by step S11
Place is set, starts vacuum pump, is vacuumized again, vacuum pressure value is -98Kpa, keeps 30s；
S13: sealing storage.
The relative humidity of the fluid injection environment of the electrolyte filling method is 1%.
The fluid injection environment temperature of the electrolyte filling method is 25 DEG C.
Embodiment 3
As shown in figure 8, a kind of electrolyte filling method of lithium battery comprising the steps of:
S1: fluid injection: battery battery core is placed in the pallet, and using priming device, filling head 11 is electric to battery
Start fluid injection inside core 13, reservoir quantity is the 15% of battery battery core capacity；
S2: once vacuumize: the battery battery core 13 after a fluid injection is delivered to vacuum evacuation device 200 by starting conveyer
At corresponding position, start vacuum pump, once vacuumized, vacuum pressure value is -25Kpa, keeps 40s；
S3: secondary fluid injection: conveyer continues the battery battery core 13 after once vacuumizing and is transferred at priming device, fluid injection
First 11 carry out secondary fluid injection, and reservoir quantity is the 20% of battery battery core capacity；
S4: secondary vacuum pumping: conveyer continues for the battery battery core after secondary fluid injection to be transferred at vacuum evacuation device 200,
Start vacuum pump, carry out secondary vacuum pumping, vacuum pressure value is -90Kpa, keeps 40s；
S5: fluid injection three times: conveyer continues for the battery battery core after secondary vacuum pumping to be transferred at priming device 100, note
Liquid head 11 carries out fluid injection three times, and reservoir quantity is the 30% of battery battery core capacity；
S6: vacuumize three times: conveyer continues the battery battery core 13 after fluid injection three times being transferred to vacuum evacuation device 200
Place starts vacuum pump, is vacuumized three times, and vacuum pressure value is -90Kpa, keeps 40s；
S7: four fluid injections: conveyer continues the battery battery core 13 after vacuumizing three times and is transferred at priming device 100,
Filling head 11 carries out four fluid injections, and reservoir quantity is the 15% of battery battery core capacity；
S8: vacuumize twice in succession: conveyer, which continues the battery battery core after four fluid injections being transferred to two, to be set side by side
Vacuum evacuation device 200 at, start vacuum pump, carry out secondary vacuum pumping, vacuum pressure value be -98Kpa, keep 40s；
S9: five fluid injections: conveyer continues that treated that battery battery core is transferred at priming device 100 by step S8, note
Liquid head 11 carries out five fluid injections, and reservoir quantity is the 20% of battery battery core capacity；
S10: vacuumize again: conveyer continues that treated that battery battery core is transferred to vacuum evacuation device by step S9
At 200, start vacuum pump, vacuumized again, vacuum pressure value is -98Kpa, keeps 40s；
S11: precharge: conveyer continues that treated that battery battery core is transferred to the charging unit 300 by step S9, makes
The electrode of battery battery core 13 is clamped with charging connector 15, be pre-charged, charging current: 0.2C, charging voltage: 3.0V fills
Electric time 6min；
S12: vacuumize twice in succession: conveyer continues that treated that battery battery core 13 is transferred to vacuumizes by step S11
At device, start vacuum pump, vacuumized again, vacuum pressure value is -98Kpa, keeps 40s；
S13: sealing storage.
The relative humidity of the fluid injection environment of the electrolyte filling method is 1%.
The fluid injection environment temperature of the electrolyte filling method is 25 DEG C.
Embodiment 4
As shown in figure 8, a kind of electrolyte filling method of lithium battery comprising the steps of:
S0: having the lithium battery liquid injection system of embodiment 1,
S1: fluid injection: battery battery core 13 is placed in the pallet, and using priming device 100, filling head 11 is to electricity
Start fluid injection inside pond battery core 13, reservoir quantity is the 15% of battery battery core capacity；
S2: once vacuumize: the battery battery core 13 after a fluid injection is delivered to vacuum evacuation device 200 by starting conveyer
At corresponding position, start vacuum pump, once vacuumized, vacuum pressure value is -25Kpa, keeps 50s；
S3: secondary fluid injection: conveyer continues the battery battery core 13 after once vacuumizing and is transferred at priming device 100,
Filling head 11 carries out secondary fluid injection, and reservoir quantity is the 20% of battery battery core capacity；
S4: secondary vacuum pumping: conveyer continues for the battery battery core after secondary fluid injection to be transferred at vacuum evacuation device 200,
Start vacuum pump, carry out secondary vacuum pumping, vacuum pressure value is -90Kpa, keeps 50s；
S5: fluid injection three times: conveyer continues for the battery battery core 13 after secondary vacuum pumping to be transferred at priming device 100,
Filling head 11 carries out fluid injection three times, and reservoir quantity is the 30% of battery battery core capacity；
S6: vacuumize three times: conveyer continues the battery battery core 13 after fluid injection three times being transferred to vacuum evacuation device 200
Place starts vacuum pump, is vacuumized three times, and vacuum pressure value is -90Kpa, keeps 50s；
S7: four fluid injections: conveyer continues the battery battery core 13 after vacuumizing three times and is transferred at priming device 100,
Filling head 11 carries out four fluid injections, and reservoir quantity is the 15% of battery battery core capacity；
S8: vacuumize twice in succession: conveyer continues the battery battery core 13 after four fluid injections being transferred to two to be set side by side
At the vacuum evacuation device 200 set, start vacuum pump, carry out secondary vacuum pumping, vacuum pressure value is -98Kpa, keeps 50s；
S9: five fluid injections: conveyer continues that treated that battery battery core is transferred at priming device 100 by step S8, note
Liquid head 11 carries out five fluid injections, and reservoir quantity is the 20% of battery battery core capacity；
S10: vacuumize again: conveyer continues that treated that battery battery core is transferred to vacuum evacuation device by step S9
At 200, start vacuum pump, vacuumized again, vacuum pressure value is -98Kpa, keeps 50s；
S11: precharge: conveyer continues that treated that battery battery core is transferred to the charging unit 300 by step S9, makes
The electrode of battery battery core 13 is clamped with charging connector 15, be pre-charged, charging current: 0.3C, charging voltage: 3.0V fills
Electric time 7min；
S12: vacuumize twice in succession: conveyer continues that treated that battery battery core is transferred to vacuum means by step S11
It sets at 200, starts vacuum pump, vacuumized again, vacuum pressure value is -98Kpa, keeps 50s；
S13: sealing storage.
The relative humidity of the fluid injection environment of the electrolyte filling method is 1%.
The fluid injection environment temperature of the electrolyte filling method is 25 DEG C.
Embodiment 5
The present embodiment is the change made on the basis of embodiment 3, specifically:
S11: precharge: conveyer continues that treated that battery battery core 13 is transferred to the charging unit 300 by step S9,
The electrode of battery battery core 13 is clamped using charging connector 15, is pre-charged, charging current: 0.4C, charging voltage: 3.0V,
Charging time 7min.
Embodiment 6
The present embodiment is the change made on the basis of embodiment 3, specifically:
S11: precharge: conveyer continues that treated that battery battery core is transferred to the charging unit 300 by step S9, makes
The electrode of battery battery core 13 is clamped with charging connector 15, be pre-charged, charging current: 0.5C, charging voltage: 3.0V fills
Electric time 7min.
Comparative example
The step S11 of embodiment 2 is removed, other carry out loop test with embodiment 2, to the battery battery core after the fluid injection,
Test data is shown in Table 1；
Loop test mode: at 25 DEG C, being charged with constant voltage charging method, and limitation electric current is 9A, and final voltage is
3.65V is discharged in a manner of constant-current discharge, discharge current 180A, and the blanking voltage of electric discharge is 2.5V, respectively record circulation
Battery capacity C1 and C2 after 500 times and 1000 times, and calculate the capacity retention ratio R after the 1st circulation 500 times and 1000 times.
R500=C1/ initial capacity × 100%；
R1000=C2/ initial capacity × 100%.
Table 1 implements the capacity retention ratio of 2-6 and comparative example sample
| Sample | R500 | R1000 |
| Embodiment 2 | 95.57% | 92.54% |
| Embodiment 3 | 96.06% | 92.59% |
| Embodiment 4 | 94.37% | 91.84% |
| Embodiment 5 | 94.87% | 92.01% |
| Embodiment 6 | 95.14% | 91.47% |
| Comparative example | 90.81% | 83.45% |
From table 1 it is known that embodiment 2-6 is recycled 500 times and circulation 1000 times capacity retentions are above comparative example,
And wherein embodiment 3 recycles 500 times and circulation 1000 times capacity retentions are up to 96.06%, 92.59%, Er Qierong respectively
It is smaller than comparative example to measure vector, therefore, the battery battery core capacity of electrolyte filling method production of the invention is high, good quality.
Above-described embodiment only describes the optimal usage mode of existing equipment, and similar conventional machinery means is used to replace this reality
The element in example is applied, protection scope is each fallen within.
Claims (10)
1. a kind of lithium battery liquid injection system, the falsework (16) including conveyer and for fixing the conveyer, feature exists
In: the system further include priming device (100), charging unit (300) and vacuum evacuation device (200), the conveyer it is defeated
It send and has been spaced apart pallet (12) on band (1)；Several battery battery cores (13) are placed on the pallet (12)；
The priming device (100) includes fluid injection frame (9), passes through link block (901) below fluid injection frame (9) and is fixed with moving machine
Structure, the mobile mechanism include mobile screw rod (902), and the one end of mobile screw rod (902) is connected with motor (903), mobile screw rod
(902) movable stand (10) are threaded on, which is connected with several filling heads (11), and the filling head (11) is logical
It crosses hose and is connected to topping-up pump, the input end of topping-up pump is connected with electrolyte tank；The filling head and the battery battery core (13)
It is corresponding；
The vacuum evacuation device (200) includes fixed frame, and fixed frame includes fixed plate (2), the top installation of the fixed plate (2)
There are cylinder (3), the telescopic end (6) of the cylinder (3) passes through the fixed plate (2) and is connected with vacuum (-tight) housing (7), the vacuum (-tight) housing (7)
It is connected with vacuum pump by pipeline, fixed plate (2) lower end is equipped with support column (5), the support column (5) and the falsework
(16) fixed；
The fluid injection frame (9) is fixedly arranged above cross bar (4), and the upper surface of the cross bar (4) is equipped with several guide devices (8)；Institute
State the both ends that cross bar (4) is movably arranged on the falsework (16) column；The guide device (8) includes being mounted on the cross bar
(4) sliding block (801) of upper surface, the sliding block (801) are threaded with screw rod (803), and screw rod (803) is fixed on the falsework
(16) on crossbeam, one end of the screw rod (803) is connected with servo motor (804)；
The charging unit (300) includes top plate (14), and top plate (14) is equipped with for charging to battery battery core (13)
Charging connector (15) is additionally provided with elevating mechanism above top plate (14), which is fixed on the falsework (16)；
The filling head (11) includes spike body, and the spike body has the syringe needle head for being directed at battery battery core liquid injection port
Portion (1101) and the syringe needle tail portion (1102) connecting with the hose, the syringe needle head (1101) has liquid outlet, described
Syringe needle tail portion (1102) has inlet, and being internally provided with for the spike body is connected to the liquid outlet and the inlet
Infusion channel (1103), the side wall of the infusion channel (1103) is equipped with buffer structure close to the syringe needle head position
(1104)。
2. a kind of lithium battery liquid injection system according to claim 1, it is characterised in that: the buffer structure (1104) is ring
The buffer groove of the recessed inner wall in the infusion channel of shape.
3. a kind of lithium battery liquid injection system according to claim 2, it is characterised in that: the buffer groove is helicitic texture
Or diameter flows to the peak structure being gradually reduced along liquid.
4. a kind of lithium battery liquid injection system according to claim 1, it is characterised in that: the open end of the vacuum (-tight) housing (7)
Equipped with sealing ring.
5. a kind of lithium battery liquid injection system according to claim 1, it is characterised in that: the elevating mechanism is pneumatic actuation
Component and/or hydraulic driving part and/or electric drive component.
6. a kind of lithium battery liquid injection system according to claim 1, it is characterised in that: the priming device (100) is at least
Equipped with 5 groups.
7. a kind of lithium battery liquid injection system according to claim 1, it is characterised in that: the vacuum evacuation device (200) is extremely
It is equipped with 8 groups less.
8. a kind of electrolyte filling method of lithium battery, it is characterised in that: comprise the steps of:
S1: fluid injection: battery battery core is placed in the pallet, and using priming device (100), filling head and (11) are to electricity
Start fluid injection inside pond battery core (13), reservoir quantity is the 5-20% of battery battery core capacity；
S2: once vacuumize: the battery battery core after a fluid injection is delivered to the corresponding position of vacuum evacuation device by starting conveyer
Place starts vacuum pump, is once vacuumized, vacuum pressure value are as follows: and 15 to -25Kpa, keep 30-50s；
S3: secondary fluid injection: conveyer continues for the battery battery core after once vacuumizing (13) to be transferred at priming device (100),
Filling head (11) carries out secondary fluid injection, and reservoir quantity is the 10-20% of battery battery core capacity；
S4: secondary vacuum pumping: conveyer continues the battery battery core (13) after secondary fluid injection being transferred to vacuum evacuation device (200)
Place starts vacuum pump, carries out secondary vacuum pumping, vacuum pressure value are as follows: and 55 to -90Kpa, keep 30-50s；
S5: fluid injection three times: conveyer continues to send the battery battery core shifting (13) after secondary vacuum pumping at priming device (100),
Filling head (11) carries out fluid injection three times, and reservoir quantity is the 20-30% of battery battery core capacity；
S6: vacuumize three times: conveyer continues the battery battery core (13) after fluid injection three times being transferred to vacuum evacuation device (200)
Place starts vacuum pump, is vacuumized three times, vacuum pressure value are as follows: and 55 to -90Kpa, keep 30-50s；
S7: four fluid injections: conveyer continues at the transfer of the battery battery core after vacuumizing three times (13) to priming device (100),
Filling head (11) carries out four fluid injections, and reservoir quantity is the 10-20% of battery battery core capacity；
S8: vacuumize twice in succession: conveyer, which continues the battery battery core (13) after four fluid injections being transferred to two, to be set side by side
Vacuum evacuation device (200) at, start vacuum pump, carry out secondary vacuum pumping, vacuum pressure value are as follows: 60 to -98Kpa, keep 30-
50s；
S9: five fluid injections: conveyer continues that treated that battery battery core (13) is transferred at priming device (100) by step S8,
Filling head (11) carries out five fluid injections, and reservoir quantity is the 10-20% of battery battery core capacity；
S10: vacuumize again: conveyer continues that treated that battery battery core (13) is transferred to vacuum evacuation device by step S9
(200) at, start vacuum pump, vacuumized again, vacuum pressure value are as follows: 60 to -98Kpa, keep 30-50s；
S11: precharge: conveyer continues that treated that battery battery core (13) is transferred to the charging unit (300) by step S9,
The electrode of battery battery core is clamped using charging connector (15), is pre-charged, charging current: 0.1-0.5C, charging voltage:
2.75-3.0V the charging time: 5-7min；
S12: vacuumize twice in succession: conveyer continues that treated that battery battery core (13) is transferred to vacuum means by step S11
It sets at (200), starts vacuum pump, vacuumized again, vacuum pressure value are as follows: 60 to -98Kpa, keep 30-50s；
S13: sealing storage.
9. a kind of electrolyte filling method of lithium battery liquid injection system according to claim 8, it is characterised in that: the electrolyte filling method
Fluid injection environment relative humidity≤1%.
10. a kind of electrolyte filling method of lithium battery liquid injection system according to claim 9, it is characterised in that: the fluid injection side
The fluid injection environment temperature of method is 22-28 DEG C.
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