CN113948831A - Centrifugal liquid injection method and device - Google Patents
Centrifugal liquid injection method and device Download PDFInfo
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- CN113948831A CN113948831A CN202111559041.0A CN202111559041A CN113948831A CN 113948831 A CN113948831 A CN 113948831A CN 202111559041 A CN202111559041 A CN 202111559041A CN 113948831 A CN113948831 A CN 113948831A
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- 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
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- 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
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- 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
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- 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
- H01M50/691—Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to the technical field of lithium ion battery production, and provides a centrifugal liquid injection method and a device, wherein the centrifugal liquid injection method comprises the following steps: calculating rated liquid injection quantity C of battery core0Obtaining the required injection quantity nC0，n>1, wherein n is a weight coefficient; injecting nC into the core0The electrolyte of (1); driving the electric core to rotate centrifugally to enable the electrolyte to be fully soaked; and discharging the redundant electrolyte in the battery core. The invention effectively improves the liquid injection speed and the infiltration efficiency by adopting the mode of excessive liquid injection, and ensures the production quality and efficiency.
Description
Technical Field
The invention relates to the technical field of lithium ion battery production, in particular to a centrifugal liquid injection method and a centrifugal liquid injection device.
Background
In the production of the lithium ion battery, the injection of electrolyte is a key process. The quality of the treatment in the process directly affects the quality of the whole battery. After the battery is injected with liquid, in order to fully infiltrate the electrolyte with the pole piece and the diaphragm, the battery is usually required to be placed at high temperature and normal temperature for about 72 hours, and if the infiltration is not complete, serious consequences such as low battery cell capacity, lithium precipitation, short circuit and the like can be caused.
In the whole soaking process, the outside of the pole piece of the battery cell can be soaked by the electrolyte quickly, the time required by the process that the electrolyte is soaked from the outside of the battery cell to the middle of the pole piece is long, the process that the electrolyte is soaked in the middle of the battery cell leads to long production process time, and the production efficiency is reduced.
The existing centrifugal liquid injection method is to rotate and accelerate infiltration by centrifugal force after the battery cell is statically placed for liquid injection, the infiltration speed is limited during the static liquid injection, and the complete liquid injection of the battery cell can be realized by liquid injection for many times.
Disclosure of Invention
The invention provides a centrifugal liquid injection method and a device, which are used for overcoming the defects of complicated liquid injection procedure and low efficiency of a battery core in the prior art, improving the infiltration speed of electrolyte on the battery core, improving the liquid injection efficiency of the battery core and ensuring the quality of a battery.
The invention provides a centrifugal liquid injection method, which comprises the following steps:
calculating rated liquid injection quantity C of battery core0Obtaining the required injection quantity nC0，n >1, wherein n is a weight coefficient;
arranging a liquid injection port of the battery cell towards a first direction, and injecting nC into the battery cell0The electrolyte of (1);
driving the electric core to rotate centrifugally to ensure that the electrolyte in the electric core is fully soaked under the condition that the electrolyte is not spilled out;
and changing the direction of the liquid injection port of the battery cell into a second direction, and discharging the redundant electrolyte in the battery cell.
According to the centrifugal liquid injection method provided by the invention, nC is injected into the electric core0The step of electrolytic solution of (2) further comprises the steps of:
driving the battery core to rotate centrifugally at a first rotating speed, and injecting electrolyte at a required injection amount nC0And conveying the electric current into the electric core.
According to the centrifugal liquid injection method provided by the invention, the liquid is injected into the liquidIn-core injection of nC0The step of electrolytic solution of (2) further comprises the steps of:
and monitoring the weight of the battery cell in real time, and stopping injecting liquid into the battery cell when the monitored value is equal to the calibrated weight.
According to the centrifugal liquid injection method provided by the invention, in the step of discharging the redundant electrolyte in the battery cell, the method further comprises the following steps:
and driving the electric core to rotate centrifugally at a second rotating speed, so that the redundant electrolyte in the electric core is discharged.
According to the centrifugal liquid injection method provided by the invention, in the step of discharging the redundant electrolyte in the battery cell, the method further comprises the following steps:
and monitoring the weight of the battery cell in real time, and stopping driving the battery cell to rotate when the monitored value is equal to the product weight.
According to the centrifugal liquid injection method provided by the invention, the value range of n is as follows:
0%＜（n﹣1）C0／C0×100%≤30%。
according to the centrifugal liquid injection method provided by the invention, the value range of n is as follows:
5%≤（n﹣1）C0／C0×100%≤15%。
the invention also provides a centrifugal liquid injection device, comprising:
the centrifugal driving mechanism is used for placing the battery cell and driving the battery cell to rotate;
a reservoir to deliver an electrolyte;
the liquid injection mechanism is arranged on the centrifugal driving mechanism, is respectively connected with the liquid storage device and the battery cell and is used for injecting liquid into the battery cell;
the electrolyte discharge mechanism is arranged on the centrifugal driving mechanism and used for discharging redundant electrolyte in the battery cell, and comprises a rotating motor and a tray, and the tray is arranged at the output end of the rotating motor and used for assembling the battery cell.
According to the centrifugal liquid injection device provided by the invention, the centrifugal driving mechanism comprises a driving part and a vertically arranged rotating shaft, the output end of the driving part is connected with the rotating shaft, the rotating shaft is provided with an operation turntable along the axial direction of the rotating shaft, and the operation turntable is provided with a plurality of placing positions for placing battery cores.
According to the centrifugal liquid injection device provided by the invention, the rotating shaft is also provided with a supporting turntable, the supporting turntable is arranged between the operation turntable and the liquid storage device, and the liquid injection mechanism is arranged on the supporting turntable.
According to the centrifugal liquid injection device provided by the invention, the liquid injection mechanism comprises a fixed displacement pump and a liquid injection cup, a liquid inlet of the fixed displacement pump is connected with a liquid outlet of the liquid accumulator through a liquid injection pipeline, the horizontal height of the liquid accumulator is higher than that of the operation turntable, a liquid outlet of the fixed displacement pump is connected with a liquid inlet of the liquid injection cup, and a liquid outlet of the liquid injection cup is connected with a liquid injection port of the battery core through a liquid injection pipeline.
According to the centrifugal liquid injection device provided by the invention, the operation rotary discs are provided with a plurality of layers along the axial direction of the rotating shaft, the operation rotary disc relatively close to the liquid storage device in two adjacent operation rotary discs is provided with the quantitative pump and the liquid injection cup, the liquid inlet of the quantitative pump is connected with the liquid conveying pipeline, the liquid outlet of the quantitative pump is connected with the liquid inlet of the liquid injection cup, and the liquid outlet of the liquid injection cup is connected with a battery cell on the operation rotary disc relatively far away from the liquid storage device through the liquid injection pipeline.
According to the centrifugal liquid injection device provided by the invention, the rotating motor is arranged at the battery cell placing position of the operation turntable.
According to the centrifugal liquid injection device provided by the invention, the weighing module is arranged at the bottom side of the tray and used for acquiring the weight of the battery cell in real time.
The centrifugal liquid injection device further comprises a recovery container, wherein the recovery container is sealed and arranged on the outer side of the centrifugal driving mechanism, and a liquid collecting channel is arranged at the bottom end of the recovery container.
The centrifugal liquid injection method and the device provided by the invention comprise the following steps: calculating rated liquid injection quantity C of battery core0Obtaining the required injection quantity nC0，n >1, wherein n is a weight coefficient; arranging a liquid injection port of the battery cell towards a first direction, and injecting nC into the battery cell0The electrolyte of (1); driving the electric core to rotate centrifugally to ensure that the electrolyte in the electric core is fully soaked under the condition that the electrolyte is not spilled out; will the notes liquid mouth orientation of electric core changes into towards the second direction, discharges unnecessary electrolyte in the electric core through adopting the mode of excessive notes liquid, effectively improves and annotates liquid speed and infiltration efficiency, guarantees production quality and efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a centrifugal liquid injection device provided by the present invention;
FIG. 2 is a schematic structural diagram of an electrolyte discharge mechanism in the centrifugal liquid injection device provided by the invention;
reference numerals:
1: a reservoir; 2: a rotating shaft; 3: a fluid delivery conduit; 4: a constant delivery pump; 5: a liquid injection cup; 6: a support turntable; 7: a liquid injection pipeline; 8: an electric core; 9: an operation turntable; 10: an electrolyte discharge mechanism; 101: a rotating electric machine; 102: a tray; 11: a driven gear; 12: a drive member; 13: a liquid feeding channel; 14: a recovery vessel; 15: a liquid collection channel; 16: and a weighing module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The centrifugal liquid injection method of the present invention is described below with reference to fig. 1 to 2, and includes the following steps:
s1, calculating the rated injection quantity C of the battery cell 80Obtaining the required injection quantity nC0，n >1；
S2, arranging the liquid injection port of the battery cell 8 towards the first direction, and injecting nC into the battery cell 80The electrolyte of (1);
s3, driving the battery cell 8 to rotate centrifugally, and ensuring that the electrolyte in the battery cell 8 is fully soaked under the condition that the electrolyte is not spilled out;
s4, the electrolyte injection port of the cell 8 is changed to a second direction, and excess electrolyte in the cell 8 is discharged.
Wherein, the step S2 and the step S3 may be performed sequentially or simultaneously. In step S3, the battery cell 8 is centrifugally rotated while ensuring that the electrolyte in the battery cell 8 is not spilled.
According to the centrifugal liquid injection method provided by the invention, in the step S2, the method further comprises the following steps:
s21, driving the battery cell 8 to rotate centrifugally at the first rotation speed, and injecting the electrolyte according to the required injection amount nC0And conveyed into the battery cell 8.
According to the centrifugal liquid injection method provided by the invention, in the step S2, the method further comprises the following steps:
s22, monitoring the weight of the battery cell 8 in real time, and stopping feeding the battery cell 8 when the monitored value is equal to the calibrated weightAnd (6) injecting liquid. Wherein, the calibration weight is cell 8 and injected nC0The weight sum of the electrolytes.
According to the centrifugal liquid injection method provided by the invention, in the step S4, the method further comprises the following steps:
and S41, driving the battery cell 8 to rotate centrifugally at the second rotating speed, so that the redundant electrolyte in the battery cell 8 is discharged. The liquid injection and the liquid discharge of the electric core 8 are realized through the liquid injection port, and the excessive electrolyte is injected into the electric core through the liquid injection port, so that the electrolyte forms a soaking effect on the winding part inside the electric core, and the quick and sufficient infiltration is realized under the action of centrifugal force, the infiltration speed is improved, after the infiltration operation is completed, the redundant electrolyte is discharged through the liquid injection port, and the quality requirement of the electric core is ensured. Compared with the prior art, the infiltration efficiency is higher, and the electrolyte injected into the battery cell 8 is effectively ensured to be equal to the rated injection amount.
The second speed is lower than the first speed, that is, the first speed is a soaking speed, the electric core 8 is driven to rotate rapidly, rapid soaking of electrolyte to a structure to be soaked in the electric core 8 can be effectively increased, and soaking efficiency is improved. The second speed is the discharge speed, in order to control only the discharge of the surplus electrolyte, and avoid the throwing of the part of the rated injection amount, the second speed is slower than the first speed, meanwhile, the control is convenient to stop, that is, when the monitoring value is equal to the product weight, the driving of the cell 8 to rotate is stopped, and compared with the braking of the cell 8 rotating at the first speed, the braking of the cell 8 rotating at the second speed is performed, the inertia force generated by the cell 8 is much smaller, therefore, the rotating liquid discharge at the second speed can effectively control the electrolyte discharge amount, increase the discharge time, that is, increase the electrolyte infiltration time, and improve the uniformity and sufficiency of infiltration.
Note that the electrolyte is not suitable for mixing of moisture, which may cause failure of the electrolyte and seriously affect the quality of the battery cell. The size is seted up to electricity core 8's notes liquid mouth and is very little, 2mm ~4mm, realizes preventing the entering of moisture, compares with prior art, sets up and annotates liquid mouth and realize annotating liquid and flowing back simultaneously, has reduced owing to set up the risk that a plurality of openings increase moisture and sneak into.
According to the centrifugal liquid injection method provided by the invention, in the step S4, the method further comprises the following steps:
and S42, monitoring the weight of the battery cell 8 in real time, and stopping driving the battery cell 8 to rotate when the monitored value is equal to the product weight. Wherein the product weight is the battery core and the rated liquid injection amount C0The sum of the weights of (a) and (b).
According to the centrifugal liquid injection method provided by the invention, the value range of n is as follows:
0%＜（n﹣1）C0／C0×100%≤30%。
according to the centrifugal liquid injection method provided by the invention, the value range of n is as follows:
5%≤（n﹣1）C0／C0×100%≤15%。
the invention provides a centrifugal liquid injection method, which specifically comprises the following steps:
s1, calculating the rated injection quantity C of the battery cell 80Obtaining the required injection quantity nC0，n >1; wherein the specific value range of n is as follows:
0%＜（n﹣1）C0／C0×100%≤30%；
preferably:
5%≤（n﹣1）C0／C0×100%≤15%；
arranging the battery cell 8 on the centrifugal driving mechanism, and arranging the liquid injection port of the battery cell 8 towards a first direction, wherein the first direction in the embodiment is a direction towards the center of the centrifugal driving mechanism, and the bottom of the battery cell 8 faces outwards;
s2, turning on the centrifugal driving mechanism and/or the quantitative pump 4, and enabling the quantitative pump 4 to enable the required liquid injection amount nC0The electrolyte is pumped to a liquid injection cup 5 from a liquid storage device 1, and the electrolyte is injected into a battery cell 8 through the liquid injection cup 5;
the weight of the battery cell 8 is monitored in real time through the weighing module 16, and when the monitoring value is equal to the calibration weight, the monitoring weight is equal to the battery cell 8 and nC is injected0The electrolyte injection mechanism is closed, the electrolyte injection into the battery cell 8 is stopped, and the electrolyte injection into the battery cell 8 is completed;
s3, driving the battery cell 8 to rotate at a first rotation speed through a centrifugal driving mechanism, so that the electrolyte is fully soaked; for clarity, a side of the battery cell 8 close to the first direction is set as a first side, and a side of the battery cell 8 far from the first direction is set as a second side. In the process of driving the battery cell 8 to rotate centrifugally, the structure to be infiltrated in the battery cell 8 is sequentially infiltrated from the second side to the first side of the battery cell 8 by the excess electrolyte in the battery cell 8 under the action of centrifugal force, that is, the excess electrolyte flows to the second side of the battery cell far away from the liquid injection port under the action of centrifugal force, so that the electrolyte is prevented from being spilled out in the infiltration process; along with the infiltration of the electrolyte, the electrolyte on the upper side of the structure to be infiltrated is gradually reduced, and only redundant electrolyte is remained on the upper side of the structure to be infiltrated after the full infiltration is completed, namely the structure to be infiltrated is saturated;
s4, driving the electric core 8 to rotate (including rotating and turning) through the electrolyte discharging mechanism 10, so that the liquid injection port of the electric core 8 rotates faces a second direction, which is a direction away from the center of the centrifugal driving mechanism in this embodiment, adjusting the centrifugal driving mechanism to drive the electric core 8 to rotate at a second rotation speed, where the second rotation speed is smaller than the first rotation speed, reducing the centrifugal force, discharging the excess electrolyte in the electric core 8, preventing the discharged electrolyte from sputtering onto the centrifugal driving mechanism, and recovering the thrown excess electrolyte through the recovery container 14;
that is, the liquid injection port of the battery cell 8 is changed to face the second direction, and under the action of centrifugal force, the redundant electrolyte flows to the first side of the battery cell 8, that is, flows to the liquid injection port, and is discharged from the liquid injection port; meanwhile, after the liquid injection port is changed to face, the second side of the battery cell 8 rotates to the action direction of the rotating centrifugal force, so that the active infiltration of the electrolyte on the infiltration structure with the second side is realized, the infiltration efficiency is improved, and the infiltration effect is ensured;
compared with the prior art, the liquid is discharged by changing the orientation of the liquid injection port, so that the active infiltration of the first side and the second side of the battery cell 8 is realized, the infiltration efficiency and effect are improved, the infiltration uniformity is ensured, the saturation state is reached, and the product quality is improved; meanwhile, under the action of centrifugal force, redundant electrolyte in the battery core 3 is discharged to the second direction from the liquid injection port, so that pollution caused by the fact that the redundant electrolyte is sputtered onto equipment when being discharged is effectively prevented, and the tidiness of the equipment is improved;
the weight of the battery cell 8 is monitored in real time through the weighing module 16, and when the monitored value is equal to the weight of the product, the monitored weight is equal to the battery cell and the rated liquid injection amount C0And (3) closing the centrifugal driving mechanism to discharge the redundant electrolyte in the battery cell 8.
The centrifugal liquid injection device provided by the invention is described below, and the centrifugal liquid injection device described below and the centrifugal liquid injection method described above can be correspondingly referred to.
The invention also provides a centrifugal liquid injection device, comprising:
the liquid storage device 1 is mounted on the top side of the rack, and the liquid storage device 1 is mounted on the top side of the rack;
the centrifugal driving mechanism comprises a driving part 12 and a vertically arranged rotating shaft 2, the output end of the driving part 12 is connected with the rotating shaft 2, the liquid storage device 1 is positioned on the upper side of the rotating shaft 2, the rotating shaft 2 is provided with an operation turntable 9 along the axial direction of the rotating shaft 2, the operation turntable 9 is provided with a plurality of placing positions for placing the battery cell 8, a supporting turntable 6 is further arranged on the rotating shaft 2 between the operation turntable 9 and the liquid storage device 1, the supporting turntable 6 is provided with a constant delivery pump 4, the liquid inlet of the constant delivery pump 4 is connected with the liquid outlet of the liquid storage device 1, and the liquid outlet of the constant delivery pump 4 is connected with the liquid injection port of the battery cell 8;
the liquid injection mechanism is arranged on the centrifugal driving mechanism, is respectively connected with the liquid storage device 1 and the battery cell 8, and is used for injecting liquid into the battery cell 8;
Further, the level of the reservoir 1 is higher than the level of the work turret 9, that is, a height difference is formed between the reservoir 1 and the work turret 9, and the reservoir 1 is located above the work turret 9. The liquid outlet of reservoir 1 is connected infusion pipeline 3, and infusion pipeline 3 is used for carrying electrolyte to electric core 8, realizes that the electrolyte in reservoir 1 passes through infusion pipeline 3 and carries to electric core 8 in.
That is to say, electrolyte in the reservoir 1 is because the difference in height, carries to electric core 8 in through infusion pipeline 3, improves and annotates liquid speed, drives pivot 2 at driving piece 12 simultaneously, and then drives the operation carousel 9 rotatory, produces centrifugal force to placing in the electric core 8 of putting the position for pour into the infiltration of the electrolyte in electric core 8 into, also can accelerate simultaneously and annotate liquid efficiency.
It is noted that the driving member 12 may be an electric motor or a motor.
Wherein, operation carousel 9 sets gradually the multilayer along the axial of pivot 2, and is parallel to each other between the operation carousel 9, increases the total amount of placing the position, realizes annotating liquid for a plurality of electric cores 8 simultaneously, improves production efficiency.
Referring to fig. 2, the work turret 9 is provided with rotary motors 101, and the rotary motors 101 are located at placing positions, wherein each placing position is provided with one rotary motor 101. The output of rotating electrical machines 101 is equipped with tray 102, and tray 102 is used for the solid electric core 8 of card, guarantees the stable assembly of electric core 8, and is reliable and stable under the centrifugal action, and then can realize rotating electrical machines 101 drive tray 102 to it is rotatory to drive electric core 8, accelerates the infiltration of electrolyte, improves and annotates liquid efficiency.
Wherein, the rotating shaft 2 is also provided with a supporting turntable 6, and the supporting turntable 6 and the rotating shaft 2 synchronously rotate. The radial direction of the supporting rotary table 6 is perpendicular to the axial direction of the rotating shaft 2 and is parallel to the operation rotary table 9. The supporting rotary table 6 is arranged between the liquid storage device 1 and the operation rotary table 9, and the horizontal height of the supporting rotary table 6 is lower than that of the liquid storage device 1 and higher than that of the operation rotary table 9.
Wherein, be equipped with constant delivery pump 4 on the support carousel 6, the inlet and the infusion pipeline 3 of constant delivery pump 4 are connected, and the liquid outlet of constant delivery pump 4 is connected and is used for annotating the notes liquid pipeline 7 of liquid to electric core 8, that is to say, constant delivery pump 4 pumps quantitative electrolyte by reservoir 1 through infusion pipeline 3, and the rethread is annotated liquid pipeline 7 and is pumped quantitative electrolyte to electric core 8 in, the realization is annotated liquid to electric core 8's ration.
It should be noted that, in fig. 1, for clearly showing the structural features, only a schematic diagram that one constant delivery pump 4 corresponds to one battery cell 8 through a liquid injection pipeline 7 is given, and in practice, the constant delivery pump 4 and the liquid injection pipeline 7 correspond to placement positions one by one, that is, one constant delivery pump 4 is provided with one liquid injection pipeline 7 and corresponds to one battery cell 8, so as to achieve constant injection. Or one constant delivery pump 4 corresponds to a plurality of liquid injection pipelines 7, each liquid injection pipeline 7 corresponds to one battery cell, and the liquid injection pipeline 7 is provided with a flow valve for controlling the on-off.
It should be further noted that the rotating shaft 2 is sleeved with a driven gear 11, and the output end of the driving member 12 is provided with a driving gear, and the driving gear is engaged with the driven gear 11. It can be understood that the rotating shaft 2 is sleeved with a driven gear 11, the output end of the driving piece 12 is provided with a driving gear, and the driving gear is meshed with the driven gear 11 to realize transmission. In this embodiment, the lower extreme of pivot 2 is located to driven gear 11 cover, and driving piece 12 drive driving gear rotates, and the driving gear drives driven gear 11 and rotates, and then realizes the rotation of pivot 2. The hydraulic slip ring is sleeved at the upper end of the rotating shaft 2, and the driven gear 11 and the hydraulic slip ring are fixedly mounted relative to the rotating shaft 2.
In one embodiment, the driving member 12 is a motor, the output end of the motor is provided with a driving wheel, and the lower end of the rotating shaft 2 is provided with a driven wheel, and the driven wheel is in transmission connection with the driving wheel through a transmission belt.
According to the centrifugal liquid injection device provided by the invention, the weighing module 16 is arranged at the bottom side of the tray 102, and the weighing module 16 is used for acquiring the weight of the battery cell 8 in real time. It can be understood that the weighing module 16 is disposed on the bottom side of the tray 102, so as to measure the weight of the battery cell 8 in real time, and ensure that enough electrolyte is injected into the battery cell 8.
It should be noted that, when the metering pump 4 pumps excessive electrolyte into the battery cell 8, the electrolyte injection port of the battery cell 8 faces the direction of the rotating shaft 2, when the metering pump 4 finishes pumping the electrolyte, and the weight of the battery cell 8 measured by the weighing module 16 is greater than the rated weight, the rotating motor 101 drives the tray 102 and drives the battery cell 8 to rotate 180 °, so that the electrolyte injection port of the battery cell 8 faces the direction away from the rotating shaft 2, the driving member 12 continues to drive the rotating shaft 2 to rotate, the electrolyte in the battery cell 8 is thrown out from the electrolyte injection port of the battery cell 8 under the action of centrifugal force, when the weight of the battery cell 8 measured by the weighing module 16 is equal to the rated weight, the driving member 12 stops working or the rotating motor 101 drives the tray 102 and drives the battery cell 8 to rotate 180 °, so that the electrolyte injection port of the battery cell 8 faces the direction of the rotating shaft 2, and centrifugal infiltration continues.
The centrifugal liquid injection device further comprises a recovery container 14, the recovery container 14 is covered outside the centrifugal driving mechanism in a sealing manner, and a liquid collecting channel 15 is arranged at the bottom end of the recovery container 14. It can be understood that the recovery container 14 is closely covered on the outer side of the centrifugal driving mechanism, so as to collect the excessive electrolyte discharged from the battery cell 8. The bottom end of the recovery container 14 is provided with a liquid collecting channel 15, recovered electrolyte is discharged out of the recovery container 14, and the electrolyte is filtered and recycled, so that the cost is saved.
According to the centrifugal liquid injection device provided by the invention, the supporting turntable 6 is also provided with the liquid injection cup 5, the liquid inlet of the liquid injection cup 5 is connected with the liquid outlet of the constant delivery pump 4, and the liquid outlet of the liquid injection cup 5 is connected with the liquid injection port of the battery cell 8. It can be understood that the supporting turntable 6 is also provided with an injection cup 5, and the horizontal height of the injection cup 5 is lower than that of the liquid reservoir 1 and higher than that of the operation turntable 9, so that a height difference is formed. Annotate the inlet of liquid cup 5 and be connected with the liquid outlet of constant delivery pump 4, constant delivery pump 4 is sent quantitative electrolyte to notes liquid cup 5 by reservoir 1 pump, annotates liquid cup 5 and carries out the buffer memory to electrolyte. The liquid outlet of annotating liquid cup 5 is connected with annotating liquid pipeline 7, realizes carrying quantitative electrolyte to electric core 8 in, accomplishes and annotates the liquid.
It is worth to be noted that the metering pump 4, the liquid injection cup 5, the liquid injection pipeline 7 and the battery cell 8 correspond to each other one by one.
Wherein, in two adjacent operation carousels 9, be equipped with constant delivery pump 4 and notes liquid cup 5 on the operation carousel 9 that is close to reservoir 1 relatively, the liquid outlet of constant delivery pump 4 is connected with the inlet of annotating liquid cup 5, the liquid outlet of annotating liquid cup 5 is connected with the electric core 8 that is located the operation carousel 9 of keeping away from reservoir 1 relatively through annotating liquid pipeline 7, that is to say, in two adjacent operation carousels 9 from top to bottom, be equipped with constant delivery pump 4 and annotate liquid cup 5 on the operation carousel 9 that is located the top, this constant delivery pump 4 and annotate liquid cup 5 are corresponding to the electric core 8 on the position of placing on the operation carousel 9 that is located the below.
Concretely, the electric core 8 on the position of placing of the operation carousel 9 of the superiors corresponds with the constant delivery pump 4 and the notes liquid cup 5 of setting on supporting the carousel 6 and annotates the liquid adaptation, and electric core 8 on the position of placing of the operation carousel 9 of second floor (from top to bottom defeated) corresponds with the constant delivery pump 4 and the notes liquid cup 5 of setting on the operation carousel 9 of the superiors and annotates liquid adaptation to analogize with this, electric core 8 on the position of placing of the operation carousel 9 of the lower floor corresponds with the constant delivery pump 4 and the notes liquid cup 5 of setting on the support carousel 6 of the second layer from last and annotates liquid adaptation.
It should be further noted that the liquid injection cup 5 is set to be open, so that the gas inside the battery cell 8 flows to the liquid injection cup 5 through the liquid injection pipeline due to liquid extrusion, and then is discharged to the atmosphere from the open of the liquid injection cup 5.
In one embodiment, the supporting turntable 6 is provided with a plurality of first through holes, the operation turntable 9 is provided with a plurality of second through holes, the first through holes and the second through holes are in one-to-one correspondence, and the corresponding first through holes and the corresponding second through holes are coaxial and are used for penetrating the liquid conveying pipeline 3. It can be understood that the supporting rotary disk 6 is provided with a plurality of first through holes, the plurality of first through holes are arranged along the circumferential direction of the supporting rotary disk 6 and are close to the rotating shaft 2, and the opening direction of the first through holes is parallel to the axial direction of the rotating shaft 2. The operation carousel 9 is equipped with a plurality of second perforation, and a plurality of second perforation set up along operation carousel 9's circumference, and are close to pivot 2, and the fenestrate trompil direction of second perforation is parallel with the circumference of pivot 2, and the second perforation and the coaxial line of first perforation one-to-one for wear to establish infusion pipeline 3.
It is noted that the lowermost work turret 9 of the plurality of work turrets 9 is not provided with a second perforation. The number of the transfusion pipes 3 is the same as the number of the fixed displacement pumps 4, that is, the number of the placement positions. Alternatively, a plurality of fixed displacement pumps 4 are connected to one liquid conveying pipe 3.
In one embodiment, the shaft 2 is provided with a hydraulic slip ring, and the liquid outlet of the reservoir 1 is connected to the liquid inlet of the hydraulic slip ring, and the liquid outlet of the hydraulic slip ring is connected to the liquid conveying pipe 3. It will be appreciated that the shaft 2 is provided with hydraulic slip rings which are rotatable in synchronism with the shaft 2. The liquid outlet of reservoir 1 is connected with the inlet of hydraulic pressure sliding ring, and the liquid outlet of hydraulic pressure sliding ring is connected with infusion pipeline 3, and the electrolyte in reservoir 1 gets into the hydraulic pressure sliding ring by the liquid outlet to in the liquid outlet by the hydraulic pressure sliding ring flows into infusion pipeline 3, realize the transport of electrolyte, realize infusion pipeline 3 and 2 synchronous rotations of pivot simultaneously.
It is worth to be noted that the number of the liquid conveying pipelines 3 is the same as the number of the liquid outlets of the hydraulic slip ring. The liquid storage device 1 is fixedly arranged on the top side of the rotating shaft 2 through a frame.
The centrifugal liquid injection device further comprises a controller, and the controller is electrically connected with the driving piece 12, the fixed displacement pump 4 and the rotating motor 101 respectively. It will be appreciated that the input of the controller is electrically connected to the weighing module 16 and the output of the controller is electrically connected to the driver 12, the dosing pump 4 and the rotary motor 101 respectively. The controller receives the real-time weight of the battery cell 8 measured by the weighing module 16, compares the real-time weight with a preset rated weight in the controller, and sends corresponding instructions to the driving piece 12, the constant delivery pump 4 and the rotating motor 101.
The centrifugal liquid injection method and the device provided by the invention comprise the following steps: calculating rated liquid injection quantity C of battery core0Obtaining the required injection quantity nC0，n >1, wherein n is a weight coefficient; injecting nC into the cell0The electrolyte of (1); driving the electric core to rotate centrifugally to enable the electrolyte to be fully soaked; redundant electrolyte in the battery core is discharged, and the liquid injection speed and the infiltration efficiency are effectively improved by adopting an excess liquid injection mode, so that the production quality and the production efficiency are ensured.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (15)
1. A centrifugal liquid injection method is characterized by comprising the following steps:
calculating rated liquid injection quantity C of battery core0Obtaining the required injection quantity nC0，n >1, wherein n is a weight coefficient;
arranging a liquid injection port of the battery cell towards a first direction, and injecting nC into the battery cell0The electrolyte of (1);
driving the electric core to rotate centrifugally to ensure that the electrolyte in the electric core is fully soaked under the condition that the electrolyte is not spilled out;
and changing the direction of the liquid injection port of the battery cell into a second direction, and discharging the redundant electrolyte in the battery cell.
2. The centrifugal priming method of claim 1, wherein said injecting nC into said core0The step of electrolytic solution of (2) further comprises the steps of:
driving the battery core to rotate centrifugally at a first rotating speed, and injecting electrolyte at a required injection amount nC0And conveying the electric current into the electric core.
3. The centrifugal priming method of claim 1, wherein said injecting nC into said core0The step of electrolytic solution of (2) further comprises the steps of:
and monitoring the weight of the battery cell in real time, and stopping injecting liquid into the battery cell when the monitored value is equal to the calibrated weight.
4. The centrifugal liquid injection method according to claim 1, wherein the step of discharging the excess electrolyte in the battery cell further comprises the following steps:
and driving the electric core to rotate centrifugally at a second rotating speed, so that the redundant electrolyte in the electric core is discharged.
5. The centrifugal liquid injection method according to claim 4, wherein the step of discharging the excess electrolyte in the battery cell further comprises the following steps:
and monitoring the weight of the battery cell in real time, and stopping driving the battery cell to rotate when the monitored value is equal to the product weight.
6. The centrifugal priming method of any one of claims 1 to 5, wherein n is selected from the range consisting of:
0%＜（n﹣1）C0／C0×100%≤30%。
7. the centrifugal liquid injection method according to claim 6, wherein n is in a range of:
5%≤（n﹣1）C0／C0×100%≤15%。
8. a centrifugal priming device, comprising:
the centrifugal driving mechanism is used for placing the battery cell and driving the battery cell to rotate;
a reservoir to deliver an electrolyte;
the liquid injection mechanism is arranged on the centrifugal driving mechanism, is respectively connected with the liquid storage device and the battery cell and is used for injecting liquid into the battery cell;
the electrolyte discharge mechanism is arranged on the centrifugal driving mechanism and used for discharging redundant electrolyte in the battery cell, and comprises a rotating motor and a tray, and the tray is arranged at the output end of the rotating motor and used for assembling the battery cell.
9. The centrifugal liquid injection device according to claim 8, wherein the centrifugal driving mechanism comprises a driving member and a vertically arranged rotating shaft, an output end of the driving member is connected with the rotating shaft, the rotating shaft is provided with an operation turntable along an axial direction of the rotating shaft, and the operation turntable is provided with a plurality of placing positions for placing the battery cells.
10. The centrifugal liquid injection device according to claim 9, wherein the rotating shaft further comprises a supporting turntable, the supporting turntable is disposed between the operation turntable and the liquid reservoir, and the liquid injection mechanism is disposed on the supporting turntable.
11. The centrifugal liquid injection device according to any one of claims 9 to 10, wherein the liquid injection mechanism comprises a fixed displacement pump and a liquid injection cup, a liquid inlet of the fixed displacement pump is connected with a liquid outlet of the liquid accumulator through a liquid injection pipeline, the liquid level of the liquid accumulator is higher than that of the operation turntable, a liquid outlet of the fixed displacement pump is connected with a liquid inlet of the liquid injection cup, and a liquid outlet of the liquid injection cup is connected with a liquid injection port of the battery core through a liquid injection pipeline.
12. The centrifugal liquid injection device according to claim 11, wherein the operation rotating disc is provided with a plurality of layers along the axial direction of the rotating shaft, in two adjacent operation rotating discs, the operation rotating disc relatively close to the liquid storage device is provided with the constant delivery pump and the liquid injection cup, a liquid inlet of the constant delivery pump is connected with the liquid delivery pipe, a liquid outlet of the constant delivery pump is connected with a liquid inlet of the liquid injection cup, and a liquid outlet of the liquid injection cup is connected with an electric core on the operation rotating disc relatively far away from the liquid storage device through the liquid injection pipe.
13. The centrifugal liquid injection device according to claim 9, wherein the rotating motor is provided at a cell placing position of the operation turntable.
14. The centrifugal liquid injection device according to claim 13, wherein a weighing module is arranged on the bottom side of the tray, and the weighing module is used for acquiring the weight of the battery cell in real time.
15. The centrifugal liquid injection device according to claim 8, further comprising a recovery container, wherein the recovery container is covered outside the centrifugal driving mechanism, and a liquid collecting channel is arranged at the bottom end of the recovery container.
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