CN106602144B - Method and device for shortening standing time of ternary system power battery after liquid injection - Google Patents
Method and device for shortening standing time of ternary system power battery after liquid injection Download PDFInfo
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- CN106602144B CN106602144B CN201610951220.1A CN201610951220A CN106602144B CN 106602144 B CN106602144 B CN 106602144B CN 201610951220 A CN201610951220 A CN 201610951220A CN 106602144 B CN106602144 B CN 106602144B
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Filling, Topping-Up Batteries (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a method and a device for shortening standing time of a ternary system power battery after liquid injection, wherein the battery is placed in a liquid injection vacuum bin for liquid injection; transferring the battery to a mechanical beating mechanism by a mechanical arm for beating; transferring the mixture into a first vacuum standing bin through a transfer rail for first vacuum standing; transferring the mixture into a second vacuum standing bin for second vacuum standing; transferring the mixture into a third vacuum standing bin for third vacuum standing; the battery air bag is transferred to a vacuum packaging mechanism by a manipulator and packaged; the battery is charged for a short time. The method and the device for shortening the standing time of the ternary system power battery after liquid injection technically transform the liquid injection process and promote the infiltration of the electrolyte on the anode plate, the cathode plate and the diaphragm, so that the standing time at normal temperature after liquid injection can be shortened, and the production capacity of the battery can be improved.
Description
Technical Field
The invention belongs to the field of batteries, and particularly relates to a method and a device for shortening standing time of a ternary system power battery after liquid injection.
Background
In the existing ternary system power battery production mode, after the battery is assembled and injected, the battery needs to be stood at normal temperature or high temperature, and the battery is precharged after the standing is finished. The purpose of standing after liquid injection is to fully soak the electrolyte, the anode and cathode materials of the battery and the diaphragm, and the electrolyte is used as a lithium ion transmission medium in the charging and discharging processes of the battery. In the subsequent first charge-discharge activation process of the battery, lithium ions and electrolyte react on a solid-liquid interface of a battery cathode material and the electrolyte, an SEI film is generated on the surface of the cathode material, and the quality of the SEI film is directly related to the performance of the lithium ion battery. The wetting effect of the electrolyte directly influences the formation condition of the SEI film of the battery, thereby influencing the electrochemical performance of the battery.
In the existing production process, in order to ensure that the electrolyte is fully infiltrated with anode and cathode materials and a diaphragm of the battery, the battery needs to be kept stand for 24-36 hours after liquid injection is completed, and the production capacity of the battery is greatly influenced.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for shortening the standing time of a ternary system power battery after liquid injection, which technically modify the liquid injection process to promote the infiltration of the electrolyte into the positive and negative electrode sheets and the separator, thereby shortening the standing time at normal temperature after liquid injection and improving the production capacity.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method and a device for shortening standing time of a ternary system power battery after liquid injection comprise the following steps:
1) placing the battery in a liquid injection vacuum bin for liquid injection;
2) transferring the battery to a mechanical beating mechanism by a mechanical arm for beating;
3) transferring the mixture into a first vacuum standing bin through a transfer rail for first vacuum standing;
4) transferring the mixture into a second vacuum standing bin for second vacuum standing;
5) transferring the mixture into a third vacuum standing bin for third vacuum standing;
6) the battery air bag is transferred to a vacuum packaging mechanism by a manipulator and packaged;
7) the battery was charged for a short time, with a charging current of 10A and a time of 3 seconds.
Further, mechanical patting mechanism includes cylinder, push pedal, expanding spring, battery splint, the process of patting is:
each group of mechanical beating mechanisms can be used for placing 18 batteries, the battery clamping plates are opened by pushing the push plates through the air cylinders, the air cylinders retreat and enable the battery clamping plates to be closed through the elasticity of the telescopic springs to beat the batteries, and the beating pressure is 20-50 kgf.
Further, the first vacuum standing is as follows: vacuumizing until the vacuum degree is-35 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, and vacuumizing until the vacuum degree is-35 KPa, and repeating for four times.
Further, the second vacuum standing is as follows: vacuumizing to a vacuum degree of-65 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, vacuumizing to-65 KPa, and repeating for four times.
Further, the third vacuum standing is as follows: vacuumizing to make the vacuum degree of the standing still be-90 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, and vacuumizing to-90 KPa, and repeating the steps for four times.
Further, the liquid filling machine device comprises a vacuum liquid filling bin, a mechanical beating mechanism, a first vacuum standing bin, a second vacuum standing bin, a third vacuum standing bin and a vacuum packaging mechanism, wherein the mechanical beating mechanism moves in the transfer track;
the vacuum liquid injection bin is used for injecting liquid into the battery in a vacuum state, so that the electrolyte is ensured to be quickly soaked into the battery;
the mechanical beating mechanism is used for quickly beating the battery, extruding bubbles in the battery and promoting the infiltration of electrolyte;
each vacuum standing bin is used for carrying out longitudinal fluctuation type vacuum standing on the battery;
the vacuum packaging mechanism is used for packaging the battery air bag in a vacuum state.
Further, the mechanical flapping mechanism comprises a cylinder, a push plate, a telescopic spring and a battery clamping plate,
the cylinder is connected with a push plate, and the push plate pushes the battery clamping plate;
the battery splint quantity is a plurality of, places the battery in every battery splint, is equipped with expanding spring between two adjacent battery splint.
Compared with the prior art, the method for shortening the standing time of the ternary system power battery after liquid injection has the following advantages: on the basis of the existing liquid injection mode, the mode of vacuum standing is changed, mechanical beating and short-time charging are added, and the functions can be realized on the liquid injection machine. Meanwhile, the influence of the increase of the functions on the liquid injection capacity is limited, the normal-temperature standing time after liquid injection is greatly shortened on the premise of ensuring the performance of the battery, the production capacity is improved, and the cost is reduced.
Drawings
FIG. 1 is a schematic flow diagram of a liquid injection machine;
FIG. 2 is a schematic structural diagram of a mechanical flapping mechanism according to an embodiment of the present invention;
FIG. 3 is a simulated view of three vacuum stills according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a longitudinal wave type resting simulation of the first vacuum resting according to an embodiment of the present invention;
fig. 5 is a state diagram of the negative electrode before and after short-time charging of the battery according to the embodiment of the present invention.
Description of the drawings:
1-a cylinder; 2-pushing the plate; 3-a telescopic spring; 4-battery clamping plate; 5-a battery body; 6-air bag.
Detailed Description
Interpretation of terms:
transversely progressive vacuum standing: and (4) after liquid injection, carrying out three times of vacuum standing, wherein the first standing vacuum degree is less than the second standing vacuum degree and less than the third standing vacuum degree.
Longitudinal wave type vacuum standing: the vacuum degree is not constant when the vacuum is kept still each time, but the vacuum is unloaded to the normal pressure after a certain time, and then the vacuum is pumped to the set value, so that the process is repeated for a plurality of times.
The present invention will be described in detail with reference to the following examples and accompanying drawings.
A method and a device for shortening standing time of a ternary system power battery after liquid injection are disclosed, the flow is shown in figure 1, and the steps are as follows:
1) placing the battery in a liquid injection vacuum bin for liquid injection;
2) transferring the battery to a mechanical beating mechanism by a mechanical arm for beating;
3) transferring the mixture into a first vacuum standing bin through a transfer rail for first vacuum standing;
4) transferring the mixture into a second vacuum standing bin for second vacuum standing;
5) transferring the mixture into a third vacuum standing bin for third vacuum standing;
6) the battery air bag is transferred to a vacuum packaging mechanism by a manipulator and packaged;
7) the battery was charged for a short time, with a charging current of 10A and a time of 3 seconds.
Wherein, mechanical flapping mechanism includes cylinder 1, push pedal 2, expanding spring 3, battery splint 4, and the flapping mechanism structure is as shown in figure 2, the flapping process is:
each group of mechanical beating mechanisms can be used for placing 18 batteries, the pushing plate 2 is pushed through the air cylinder 1 to open the battery clamping plate 4, the air cylinder 1 is retreated to enable the battery clamping plate 4 to close and beat the batteries through the elasticity of the telescopic spring 3, and the beating pressure is 20-50 kgf.
Wherein, the first vacuum standing is as follows: vacuumizing until the vacuum degree is-35 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, and vacuumizing until the vacuum degree is-35 KPa, and repeating for four times. The battery is extruded through the change of the air pressure in the vacuum cavity, and the gas in the battery is further promoted to be discharged.
Wherein, the second vacuum standing is as follows: vacuumizing to a vacuum degree of-65 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, vacuumizing to-65 KPa, and repeating for four times.
Wherein, the third vacuum standing is as follows: vacuumizing to make the vacuum degree of the standing still be-90 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, and vacuumizing to-90 KPa, and repeating the steps for four times.
The liquid filling machine device comprises a vacuum liquid filling bin, a mechanical beating mechanism, a first vacuum standing bin, a second vacuum standing bin, a third vacuum standing bin and a vacuum packaging mechanism, wherein the mechanical beating mechanism moves in a transfer track, and a battery is carried in the beating mechanism and transferred to the vacuum standing bin for vacuum standing;
the vacuum liquid injection bin is used for injecting liquid into the battery in a vacuum state, so that the electrolyte is ensured to be quickly soaked into the battery;
the mechanical beating mechanism is used for quickly beating the battery, extruding bubbles in the battery and promoting the infiltration of electrolyte;
each vacuum standing bin is used for carrying out longitudinal fluctuation type vacuum standing on the battery;
the vacuum packaging mechanism is used for packaging the battery air bag in a vacuum state.
Wherein the mechanical flapping mechanism comprises a cylinder 1, a push plate 2, a telescopic spring 3 and a battery clamping plate 4,
the cylinder 1 is connected with a push plate 2, and the push plate 2 pushes a battery clamping plate 4;
the battery clamp plate 4 quantity is a plurality of, places the battery in every battery clamp plate 4, is equipped with expanding spring 3 between two adjacent battery clamp plates 4.
After injection, three times of vacuum standing are carried out, the vacuum degrees are different, and a horizontal three times of progressive vacuum standing simulation diagram is shown in figure 3. In each vacuum standing process, longitudinal wave type vacuum standing is carried out, taking the first vacuum standing as an example, and a simulation diagram of the longitudinal wave type vacuum standing is shown in fig. 4.
Fig. 5 is a diagram showing the state of the negative electrode before and after short-time charging. After the battery is injected with liquid, the battery is charged for a short time, so that the battery has a certain charge amount, the negative electrode particles expand, and the pores among the negative electrode particles can be increased, thereby facilitating the absorption of the negative electrode on the electrolyte and achieving the purpose of shortening the standing time after the liquid injection.
In the technical scheme of the invention, the procedures of vacuum liquid injection, mechanical beating, three-time vacuum standing and short-time charging can be realized on a liquid injection machine. On the basis of the existing liquid injection mode, the invention carries out technical and equipment transformation on the battery in the liquid injection process, thereby promoting the battery to infiltrate the electrolyte after liquid injection, shortening the standing time for 4-12h after liquid injection and improving the production capacity by 50-60%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A method for shortening standing time of a ternary system power battery after liquid injection is characterized by comprising the following steps: the method comprises the following steps:
1) placing the battery in a liquid injection vacuum bin for liquid injection;
2) transferring the battery to a mechanical beating mechanism by a mechanical arm for beating;
3) transferring the mixture into a first vacuum standing bin through a transfer rail for first vacuum standing;
4) transferring the mixture into a second vacuum standing bin for second vacuum standing;
5) transferring the mixture into a third vacuum standing bin for third vacuum standing;
6) the battery air bag is transferred to a vacuum packaging mechanism by a manipulator and packaged;
7) charging the battery for a short time, wherein the charging current is 10A, and the time is 3 seconds;
the mechanical flapping mechanism comprises a cylinder (1), a push plate (2), a telescopic spring (3) and a battery clamping plate (4);
the cylinder (1) is connected with the push plate (2), and the push plate (2) pushes the battery clamping plate (4); the number of the battery clamping plates (4) is multiple, a battery is placed in each battery clamping plate (4), and a telescopic spring (3) is arranged between every two adjacent battery clamping plates (4);
the flapping process comprises the following steps:
the push plate (2) is pushed through the cylinder (1) to open the battery clamping plate (4), and the cylinder (1) retreats to close the battery clamping plate (4) through the elasticity of the telescopic spring (3) to form flapping.
2. The method for shortening the standing time of the ternary system power battery after liquid injection according to claim 1, characterized in that: the first vacuum standing is as follows: vacuumizing until the vacuum degree is-35 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, and vacuumizing until the vacuum degree is-35 KPa, and repeating for four times.
3. The method for shortening the standing time of the ternary system power battery after liquid injection according to claim 1, characterized in that: the second vacuum standing is as follows: vacuumizing to a vacuum degree of-65 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, vacuumizing to-65 KPa, and repeating for four times.
4. The method for shortening the standing time of the ternary system power battery after liquid injection according to claim 1, characterized in that: the third vacuum standing is as follows: vacuumizing to make the vacuum degree of the standing still be-90 KPa, keeping for 70 s, then discharging the vacuum to normal pressure, and vacuumizing to-90 KPa, and repeating the steps for four times.
5. The utility model provides a shorten device of ternary system power battery post-injection time of stewing which characterized in that: the device comprises a vacuum liquid injection bin, a mechanical beating mechanism, a first vacuum standing bin, a second vacuum standing bin, a third vacuum standing bin and a vacuum packaging mechanism, wherein the mechanical beating mechanism moves in a transfer track;
the vacuum liquid injection bin is used for injecting liquid into the battery in a vacuum state, so that the electrolyte is ensured to be quickly soaked into the battery;
the mechanical beating mechanism is used for quickly beating the battery, extruding bubbles in the battery and promoting the infiltration of electrolyte;
each vacuum standing bin is used for carrying out longitudinal fluctuation type vacuum standing on the battery;
the vacuum packaging mechanism is used for packaging the battery air bag in a vacuum state;
the mechanical flapping mechanism comprises a cylinder (1), a push plate (2), a telescopic spring (3) and a battery clamping plate (4),
the cylinder (1) is connected with the push plate (2), and the push plate (2) pushes the battery clamping plate (4);
the quantity of battery splint (4) is a plurality of, places the battery in every battery splint (4), is equipped with expanding spring (3) between two adjacent battery splint (4).
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| CN201610951220.1A CN106602144B (en) | 2016-11-02 | 2016-11-02 | Method and device for shortening standing time of ternary system power battery after liquid injection |
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| CN201610951220.1A CN106602144B (en) | 2016-11-02 | 2016-11-02 | Method and device for shortening standing time of ternary system power battery after liquid injection |
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| CN107403691B (en) * | 2017-06-21 | 2019-08-27 | 珠海格力电器股份有限公司 | Oiling control method, oiling machine, processor and storage medium |
| CN108306062A (en) * | 2018-01-31 | 2018-07-20 | 北京国能电池科技股份有限公司 | Improve chemical synthesizing method, Battery formation fixture and application and the Soft Roll power battery of Soft Roll power battery cycle life |
| CN109921095B (en) * | 2019-02-11 | 2022-05-13 | 多氟多新能源科技有限公司 | Staged high-temperature vacuum standing method for soft-package battery |
| CN109817878B (en) * | 2019-03-20 | 2024-03-05 | 江西力能新能源科技有限公司 | Lithium battery liquid injection system and liquid injection method |
| CN110534811A (en) * | 2019-09-04 | 2019-12-03 | 梅州市量能新能源科技有限公司 | A kind of preparation method of soft bag lithium ionic cell |
| CN111416158B (en) * | 2020-04-26 | 2021-08-03 | 天津市捷威动力工业有限公司 | Pole piece infiltration method of soft package lithium ion battery |
| CN111403819A (en) * | 2020-05-06 | 2020-07-10 | 湖北亿纬动力有限公司 | Method for improving electrolyte infiltration of ternary battery and battery obtained by method |
| CN111933993B (en) * | 2020-08-21 | 2021-12-28 | 东莞市德瑞精密设备有限公司 | Soft packet of power battery patting mechanism |
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| JPH0461746A (en) * | 1990-06-28 | 1992-02-27 | Fuji Elelctrochem Co Ltd | Manufacture of spiral battery with non-aqueous electrolyte |
| JPH11265705A (en) * | 1998-03-16 | 1999-09-28 | Mitsubishi Cable Ind Ltd | Manufacture of battery and manufacturing device thereof |
| CN101826634B (en) * | 2010-05-17 | 2015-07-01 | 江西省福斯特新能源有限公司 | Lithium ion battery and manufacturing method thereof |
| DE102010052397A1 (en) * | 2010-11-24 | 2012-05-24 | Li-Tec Battery Gmbh | Method and device for filling an electrochemical cell |
| CN102306740B (en) * | 2011-08-17 | 2013-11-13 | 东莞市骏泰精密机械有限公司 | Vacuum injection equipment of flexibly-packaged lithium battery |
| KR101547819B1 (en) * | 2012-11-08 | 2015-08-27 | 주식회사 엘지화학 | The Method for Preparing Secondary Battery |
| CN202977588U (en) * | 2012-12-13 | 2013-06-05 | 安徽亿诺新能源有限责任公司 | Linear automatic liquid injection machine for high-capacity alkaline power battery |
| KR101747909B1 (en) * | 2014-02-13 | 2017-06-15 | 주식회사 엘지화학 | Apparatus for impregnating electrode assembly with electrolyte |
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