CN112838281A - Negative pressure control method and system for formation of lithium ion battery - Google Patents
Negative pressure control method and system for formation of lithium ion battery Download PDFInfo
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- CN112838281A CN112838281A CN202110020342.XA CN202110020342A CN112838281A CN 112838281 A CN112838281 A CN 112838281A CN 202110020342 A CN202110020342 A CN 202110020342A CN 112838281 A CN112838281 A CN 112838281A
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- negative pressure
- electric proportional
- proportional valve
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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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- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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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
Abstract
The invention relates to the technical field of lithium ion battery formation, in particular to a negative pressure control method and a negative pressure control system for lithium ion battery formation. The method comprises the following steps: the industrial personal computer controls the negative pressure reducing valve to vacuumize the needle bed negative pressure loop; adjusting the vacuum degree of a needle bed negative pressure loop; stopping the machine and breaking vacuum of the needle bed negative pressure loop; and after the machine is stopped, the negative pressure loop of the needle bed is subjected to pipeline purging through high positive pressure. The negative pressure control method and the negative pressure control system have the advantages of being stable in control, easy to adjust and stable in vacuum breaking, negative pressure is generated through the first electric proportional valve and the negative pressure reducing valve during vacuumizing, feedback is carried out by utilizing the electronic pressure gauge, air pressure change and control are stable, in the operation process, air pressure can be adjusted through the negative pressure reducing valve and the second electric proportional valve, the problems that an existing negative pressure control system is unstable in control, difficult to adjust and unstable in vacuum breaking are solved, and the requirement of battery production is met.
Description
Technical Field
The invention relates to the technical field of lithium ion battery formation, in particular to a negative pressure control method and a negative pressure control system for lithium ion battery formation.
Background
In the production process of the lithium ion battery, certain formation processes need to control the battery to be charged and discharged within a vacuum degree range with a certain negative pressure value.
When the existing negative pressure control system is vacuumized, only stepped vacuumizing can be realized, so that the vacuum degree in a loop is unstable and changes more violently, and parts in the negative pressure control system are easily damaged; on the other hand, the vacuum pumping work of the existing negative pressure control system is difficult to adjust, when the preset high vacuum degree is reached, the smaller vacuum degree cannot be actively adjusted, and the using degree of freedom is lower; in addition, after the negative pressure control system is shut down, the vacuum state needs to be relieved, i.e. the vacuum breaking work, the existing negative pressure control system usually breaks the vacuum at normal pressure, the air pressure changes violently, and the parts are easy to be damaged, so a new negative pressure control method and a new negative pressure control system for lithium ion battery formation are needed to solve the defects.
Disclosure of Invention
In order to overcome the technical defects of unstable control, difficult adjustment and unstable vacuum breaking existing in the conventional negative pressure control system, the invention provides a negative pressure control method and a negative pressure control system for formation of a lithium ion battery, which are stable in control, easy to adjust and stable in vacuum breaking.
In order to solve the problems, the invention is realized according to the following technical scheme:
the invention relates to a negative pressure control system for lithium ion battery formation, which comprises a first electric proportional valve, a negative pressure reducing valve, a second electric proportional valve, an industrial personal computer, a switching unit, an electronic pressure gauge and a needle bed negative pressure loop, and is characterized in that: the first electric proportional valve, the negative pressure reducing valve and the second electric proportional valve are arranged at intervals, the first electric proportional valve is connected with the negative pressure reducing valve through an air channel, one side of the first electric proportional valve, one side of the negative pressure reducing valve and one side of the second electric proportional valve are provided with an industrial personal computer, the industrial personal computer is respectively electrically connected with the first electric proportional valve and the second electric proportional valve, the first electric proportional valve, the negative pressure reducing valve and the other side of the second electric proportional valve are provided with a switching unit and an electronic pressure gauge, the electronic pressure gauge is electrically connected with the industrial personal computer, the electronic pressure gauge is connected with the switching unit through an air channel, the input end of the switching unit is respectively connected with the negative pressure reducing valve and the second electric proportional valve through an air channel, and the output end of.
And the first electric proportional valve, the negative pressure reducing valve and the second electric proportional valve are respectively connected with an air pressure source.
A negative pressure control method for formation of a lithium ion battery is characterized by being applied to a negative pressure control system for formation of a lithium ion battery, and the method comprises the following steps:
the industrial personal computer controls the negative pressure reducing valve to vacuumize the needle bed negative pressure loop;
the vacuum degree of the needle bed negative pressure loop is subjected to feedback adjustment;
stopping the machine and breaking vacuum of the needle bed negative pressure loop;
and after the machine is stopped, the negative pressure loop of the needle bed is subjected to pipeline purging through high positive pressure.
The industrial computer control negative pressure relief valve carry out the evacuation to needle bed negative pressure return circuit, specifically do: the switching unit is switched to the negative pressure reducing valve, the industrial personal computer outputs a starting signal to the first electric proportional valve, the first electric proportional valve pushes the negative pressure reducing valve to work, stable negative pressure quantity is output to the needle bed negative pressure loop, the electronic pressure gauge reads a pressure value and feeds the pressure value back to the industrial personal computer, the industrial personal computer outputs a signal to the first electric proportional valve again through the fed-back pressure value, and the first electric proportional valve pushes the negative pressure reducing valve to work again until the pressure value gradually reaches a pressure value set by vacuumizing.
The vacuum degree of the needle bed negative pressure loop is adjusted, and the method specifically comprises the following steps: when the vacuum degree of the needle bed negative pressure loop needs to be increased, the switching unit is switched to the negative pressure reducing valve, the industrial personal computer outputs a starting signal to the first electric proportional valve, and the first electric proportional valve pushes the negative pressure reducing valve to work, so that the negative pressure of the needle bed negative pressure loop is increased; when the vacuum degree of the needle bed negative pressure loop needs to be reduced, the switching unit is switched to the second electric proportional valve, the industrial personal computer outputs a starting signal to the second electric proportional valve, and the second electric proportional valve works to generate positive pressure, so that the negative pressure of the needle bed negative pressure loop is reduced.
The machine is stopped and the needle bed negative pressure loop is broken to be vacuum, which specifically comprises the following steps: the switching unit is switched to the second electric proportional valve, the industrial personal computer outputs a given signal to the second electric proportional valve, the second electric proportional valve works to generate positive pressure, the negative pressure of the needle bed negative pressure loop is reduced, and meanwhile, the electronic pressure gauge reads a pressure value and feeds the pressure value back to the industrial personal computer, so that the pressure of the needle bed negative pressure loop reaches a set pressure value.
After the machine is stopped, the negative pressure loop of the needle bed is subjected to pipeline purging through high positive pressure, and the method specifically comprises the following steps: switch over the unit and switch over to second electric proportional valve, the industrial computer exports given high positive pressure value to second electric proportional valve, and second electric proportional valve work produces the malleation, and electron pressure table reads the pressure value and feeds back to the industrial computer simultaneously, and then exports stable high positive pressure and carries out the pipeline and sweep.
Compared with the prior art, the invention has the beneficial effects that: the negative pressure control method and the system for lithium ion battery formation have the advantages of stable control, easy adjustment and stable vacuum breaking, generate negative pressure through the first electric proportional valve and the negative pressure reducing valve during vacuum pumping, utilize the electronic pressure gauge for feedback, enable the air pressure change and control to be more stable, and can adjust the air pressure through the negative pressure reducing valve and the second electric proportional valve during the operation process; when vacuum breaking is needed, positive pressure is gradually increased through the second electric proportional valve, so that air pressure can be stably changed, impact is reduced, the problems that an existing negative pressure control system is unstable in control, difficult to adjust and unstable in vacuum breaking are solved, and the requirement of battery production is met.
Drawings
Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of the system architecture of the present invention;
FIG. 2 is a schematic flow diagram of the process of the present invention.
In the figure: 1. the device comprises a first electric proportional valve, a negative pressure reducing valve, a second electric proportional valve, a first industrial personal computer, a second industrial personal computer, a switching unit, an electronic pressure gauge, a second industrial personal computer, a needle bed negative pressure loop and a needle bed negative pressure loop, wherein the first electric proportional valve 2 is connected with the negative pressure reducing valve 3, the second electric proportional valve 4 is connected with the industrial.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1 to 2, the negative pressure control system for lithium ion battery formation according to the present invention includes a first electric proportional valve 1, a negative pressure reducing valve 2, a second electric proportional valve 3, an industrial personal computer 4, a switching unit 5, an electronic pressure gauge 6 and a needle bed negative pressure loop 7, wherein the first electric proportional valve 1, the negative pressure reducing valve 2 and the second electric proportional valve 3 are arranged at intervals, the first electric proportional valve 1, the negative pressure reducing valve 2 and the second electric proportional valve 3 are respectively connected with an air pressure source, specifically, the first electric proportional valve 1 is connected with a positive pressure source, the negative pressure reducing valve 2 is connected with a negative pressure source, and the second electric proportional valve 3 is connected with a positive pressure source.
The first electric proportional valve 1 is connected with the negative pressure reducing valve 2 through an air circuit, an industrial personal computer 4 is arranged on one side of the first electric proportional valve 1, the negative pressure reducing valve 2 and the second electric proportional valve 3, the industrial personal computer 4 is respectively electrically connected with the first electric proportional valve 1 and the second electric proportional valve 3, a switching unit 5 and an electronic pressure gauge 6 are arranged on the other side of the first electric proportional valve 1, the negative pressure reducing valve 2 and the second electric proportional valve 3, the electronic pressure gauge 6 is electrically connected with the industrial personal computer 4, and the electronic pressure gauge 6 is connected with the switching unit 5 through an air circuit so as to monitor the air pressure of the system in real time; the switching unit 5 is a variable pipeline with two input ports, only one input port is allowed to be accessed, the other input port is closed, the input port of the switching unit 5 is respectively connected with the negative pressure reducing valve 2 and the second electric proportional valve 3 through an air path, the output port of the switching unit 5 is connected with the needle bed negative pressure loop 7 through an air path, the needle bed is used for mounting batteries so as to perform battery formation work, and the needle bed negative pressure loop 7 is communicated with each battery.
The invention discloses a negative pressure control method for lithium ion battery formation, which is characterized by being applied to a negative pressure control system for lithium ion battery formation, and the method comprises the following steps:
101. the industrial personal computer 4 controls the negative pressure reducing valve 2 to vacuumize the needle bed negative pressure loop 7;
the industrial personal computer 4 controls the negative pressure reducing valve 2 to vacuumize the needle bed negative pressure loop 7, and specifically comprises the following steps: the needle bed negative pressure loop 7 presses and seals each battery interface, the switching unit 5 is switched to the negative pressure reducing valve 2, the industrial personal computer 4 outputs a starting signal to the first electric proportional valve 1, the first electric proportional valve 1 pushes the negative pressure reducing valve 2 to work, fixed negative pressure is output to the needle bed negative pressure loop 7, meanwhile, the electronic pressure gauge 6 reads a pressure value and feeds the pressure value back to the industrial personal computer 4, the industrial personal computer 4 outputs a signal to the first electric proportional valve 1 again through the fed-back pressure value, the first electric proportional valve 1 pushes the negative pressure reducing valve 2 to work again, the vacuum degree is slowly, continuously and stably increased until the pressure value gradually reaches a pressure value set by vacuumizing, and then the process of battery formation can be started.
102. Adjusting the vacuum degree of the needle bed negative pressure loop 7;
the adjustment of the vacuum degree of the needle bed negative pressure loop 7 specifically comprises the following steps: in the process of battery formation, when the vacuum degree of the needle bed negative pressure loop 7 needs to be increased, the switching unit 5 is switched to the negative pressure reducing valve 2, the industrial personal computer 4 outputs a starting signal to the first electric proportional valve 1, and the first electric proportional valve 1 pushes the negative pressure reducing valve 2 to work, so that the negative pressure of the needle bed negative pressure loop 7 is increased; when the vacuum degree of the needle bed negative pressure loop 7 needs to be reduced, the switching unit 5 is switched to the second electric proportional valve 3, the industrial personal computer 4 outputs a starting signal to the second electric proportional valve 3, and the second electric proportional valve 3 works to generate positive pressure, so that the negative pressure of the needle bed negative pressure loop 7 is reduced.
103. Stopping the machine and breaking vacuum of the needle bed negative pressure loop 7;
the machine is stopped and operates and vacuum breaking is carried out on the needle bed negative pressure loop 7, and the method specifically comprises the following steps: the production work of battery formation is stopped, the switching unit 5 is switched to the second electric proportional valve 3, the industrial personal computer 4 outputs a given signal to the second electric proportional valve 3, the second electric proportional valve 3 works to generate positive pressure, the negative pressure of the needle bed negative pressure loop 7 is reduced, meanwhile, the electronic pressure gauge 6 reads a pressure value and feeds the pressure value back to the industrial personal computer 4, the pressure of the needle bed negative pressure loop 7 reaches the set pressure value, the vacuum state in the needle bed negative pressure loop 7 can be eliminated, and the work can accelerate the speed of electrolyte flowing back to the battery.
104. And after the machine is stopped, the negative pressure loop 7 of the needle bed is subjected to pipeline purging through high positive pressure.
After the machine is stopped, the negative pressure loop 7 of the needle bed is subjected to pipeline purging through high positive pressure, and the method specifically comprises the following steps: after the battery formation is finished, the work of the needle bed is stopped, the needle bed negative pressure loop 7 is opened, the switching unit 5 is switched to the second electric proportional valve 3, the industrial personal computer 4 outputs a given high positive pressure value to the second electric proportional valve 3, the second electric proportional valve 3 works to generate positive pressure, meanwhile, the electronic pressure gauge 6 reads the pressure value and feeds the pressure value back to the industrial personal computer 4, and then stable high positive pressure is output to carry out pipeline purging, the residue of electrolyte can be reduced in the work, and the electrolyte is prevented from blocking the needle bed negative pressure loop 7.
The negative pressure control method and the system have the advantages of stable control, easy adjustment and stable vacuum breaking, negative pressure is generated through the first electric proportional valve 1 and the negative pressure reducing valve 2 during vacuum pumping, feedback is carried out by utilizing the electronic pressure gauge 6, so that the air pressure change and control are stable, and the air pressure can be adjusted through the negative pressure reducing valve 2 and the second electric proportional valve 3 during the operation process; when vacuum breaking is needed, positive pressure is gradually increased through the second electric proportional valve 3, so that air pressure can be stably changed, impact is reduced, the problems that an existing negative pressure control system is unstable in control, not easy to adjust and unstable in vacuum breaking are solved, and the requirement of battery production is met.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a negative pressure control system that lithium ion battery ization becomes, includes first electric proportional valve 1, negative pressure relief valve 2, second electric proportional valve 3, industrial computer 4, switching unit 5, electron pressure table 6 and needle bed negative pressure return circuit 7, its characterized in that: the first electric proportional valve 1, the negative pressure reducing valve 2 and the second electric proportional valve 3 are arranged at intervals, the first electric proportional valve 1 is connected with the negative pressure reducing valve 2 through an air path, one side of the first electric proportional valve 1, one side of the negative pressure reducing valve 2 and one side of the second electric proportional valve 3 are provided with an industrial personal computer 4, the industrial personal computer 4 is respectively electrically connected with the first electric proportional valve 1 and the second electric proportional valve 3, the other side of the first electric proportional valve 1, the negative pressure reducing valve 2 and the second electric proportional valve 3 is provided with a switching unit 5 and an electronic pressure gauge 6, the electronic pressure gauge 6 is electrically connected with the industrial personal computer 4, the electronic pressure gauge 6 is connected with the switching unit 5 through an air path, the input end of the switching unit 5 is respectively connected with the negative pressure reducing valve 2 and the second electric proportional valve 3 through an air path, and the output end of.
2. The system of claim 1, wherein the negative pressure control system comprises: and the first electric proportional valve 1, the negative pressure reducing valve 2 and the second electric proportional valve 3 are respectively connected with an air pressure source.
3. A negative pressure control method for formation of a lithium ion battery, which is applied to the negative pressure control system for formation of a lithium ion battery according to claim 1, the method comprising:
the industrial personal computer 4 controls the negative pressure reducing valve 2 to vacuumize the needle bed negative pressure loop 7;
the vacuum degree of the needle bed negative pressure loop 7 is subjected to feedback regulation;
stopping the machine and breaking vacuum of the needle bed negative pressure loop 7;
and after the machine is stopped, the negative pressure loop 7 of the needle bed is subjected to pipeline purging through high positive pressure.
4. The negative pressure control method for formation of the lithium ion battery according to claim 3, characterized in that: the industrial personal computer 4 controls the negative pressure reducing valve 2 to vacuumize the needle bed negative pressure loop 7, and specifically comprises the following steps: switching unit 5 switches to negative pressure relief pressure valve 2, industrial computer 4 exports start signal to first electric proportional valve 1, first electric proportional valve 1 promotes negative pressure relief pressure valve 2 work, export fixed negative pressure volume to needle bed negative pressure return circuit 7, electronic pressure table 6 reads the pressure value and feeds back to industrial computer 4 simultaneously, industrial computer 4 exports the signal to first electric proportional valve 1 once more through the pressure value of feedback, first electric proportional valve 1 promotes negative pressure relief pressure valve 2 work once more, until the pressure value reaches the pressure value of evacuation settlement gradually.
5. The negative pressure control method for formation of the lithium ion battery according to claim 3, characterized in that: the adjustment of the vacuum degree of the needle bed negative pressure loop 7 specifically comprises the following steps: when the vacuum degree of the needle bed negative pressure loop 7 needs to be increased, the switching unit 5 is switched to the negative pressure reducing valve 2, the industrial personal computer 4 outputs a starting signal to the first electric proportional valve 1, and the first electric proportional valve 1 pushes the negative pressure reducing valve 2 to work, so that the negative pressure of the needle bed negative pressure loop 7 is increased; when the vacuum degree of the needle bed negative pressure loop 7 needs to be reduced, the switching unit 5 is switched to the second electric proportional valve 3, the industrial personal computer 4 outputs a starting signal to the second electric proportional valve 3, and the second electric proportional valve 3 works to generate positive pressure, so that the negative pressure of the needle bed negative pressure loop 7 is reduced.
6. The negative pressure control method for formation of the lithium ion battery according to claim 3, characterized in that: the machine is stopped and operates and vacuum breaking is carried out on the needle bed negative pressure loop 7, and the method specifically comprises the following steps: the switching unit 5 is switched to the second electric proportional valve 3, the industrial personal computer 4 outputs a given signal to the second electric proportional valve 3, the second electric proportional valve 3 works to generate positive pressure, the negative pressure of the needle bed negative pressure loop 7 is reduced, and meanwhile, the electronic pressure gauge 6 reads a pressure value and feeds the pressure value back to the industrial personal computer 4, so that the pressure of the needle bed negative pressure loop 7 reaches a set pressure value.
7. The negative pressure control method for formation of the lithium ion battery according to claim 3, characterized in that: after the machine is stopped, the negative pressure loop 7 of the needle bed is subjected to pipeline purging through high positive pressure, and the method specifically comprises the following steps: switch over unit 5 to second electric proportional valve 3, industrial computer 4 exports given high positive pressure value to second electric proportional valve 3, and second electric proportional valve 3 work produces the malleation, and electronic pressure table 6 reads the pressure value and feeds back to industrial computer 4 simultaneously, and then exports stable high positive pressure and carries out the pipeline and sweep.
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| CN202110020342.XA CN112838281B (en) | 2021-01-07 | 2021-01-07 | Negative pressure control method and system for formation of lithium ion battery |
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| CN202110020342.XA CN112838281B (en) | 2021-01-07 | 2021-01-07 | Negative pressure control method and system for formation of lithium ion battery |
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Cited By (1)
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