CN103682457B - A kind of method and device thereof controlling formation of Li-ion batteries - Google Patents
A kind of method and device thereof controlling formation of Li-ion batteries Download PDFInfo
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- CN103682457B CN103682457B CN201310663786.0A CN201310663786A CN103682457B CN 103682457 B CN103682457 B CN 103682457B CN 201310663786 A CN201310663786 A CN 201310663786A CN 103682457 B CN103682457 B CN 103682457B
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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
- H01M10/4242—Regeneration of electrolyte or reactants
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- 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
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Abstract
The invention discloses a kind of method controlling formation of Li-ion batteries, the method comprises: import or input control parameter; According to described controling parameters, formation device is controlled; Gather environmental parameter, judge that described environmental parameter exceedes predefined parameter scope; If so, adjust controling parameters and formation device is controlled.Adopting the present invention can improve the automaticity of Battery formation, make the forming process of lithium battery more reasonable and intelligent, forming preferably SEI film by controlling to change into environment; By the calculating that equipment consumes energy, make the power consumption of each Battery formation more reasonable, improve the utilization ratio of electric energy.The invention also discloses a kind of device controlling formation of Li-ion batteries.
Description
Technical field
The present invention relates to a kind of formation of Li-ion batteries technology, particularly a kind of method and device thereof controlling formation of Li-ion batteries.
Background technology
Lithium battery is formed primarily of positive pole, negative pole, electrolyte and SEI film.Wherein, SEI film is that electrode material and electrolyte react on solid-liquid phase interface in liquid lithium battery first charge-discharge process, forms the passivation layer that one deck is covered in electrode material surface.The formation of lithium battery SEI film is based on the consumption to the lithium ion in anode, and the efficiency of electrochemical reaction, directly embodies to the consumption to lithium ion.Form SEI film and consume a large amount of lithium ions, that is first charge-discharge makes battery irreversible capacity increase, and reduces the efficiency for charge-discharge of electrode material.Lithium battery SEI film compactness is related to cycle life and the stability of lithium ion.SEI film is thin and amount that the film of densification consumes is little, can reduce irreversible capacity during initial charge, and also can reduce resistance when carrying out intercalation and delamination to graphite, the charge and discharge capacity of increase, improves charge and discharge efficiency.It is the process forming SEI film that lithium ion changes into, and the various parameters of formation process directly have influence on the quality of the formation of SEI film, and therefore lithium ion formation process is maximum effect factor to lithium ion performance except material behavior.
Current density during formation of Li-ion batteries and voltage control have great impact to SEI film, be mainly reflected in the following aspects: first, under different voltage, the component of the electrolyte of negative terminal surface generation reduction decomposition is different, thus the product generated is also different, thus according to the voltage of controlled SEI film in the different stages, different SEI film effects can be produced; Under different current density, nucleus formation speed is different, causes SEI membrane structure difference, has a great impact the compactness of SEI film.Also very large impact is there is in the temperature in other cell production process on the quality that the SEI film of battery is formed.
Meanwhile, the power consumption in cell production process is very large, and wherein the electricity consumption that changes into and detect of battery accounts for full station-service electricity more than 60%, and produce the Battery Plant of tens0000 daily, the annual formation and testing electricity charge are all more than 1,000,000 yuan.Visible, reduce energy consumption and vital effect is played for reduction production cost.So under the prerequisite ensureing system reliability and battery quality, should choose efficient components and parts on the one hand when design system as far as possible, will practice every conceivable frugality electric energy on the other hand.
Realizing in process of the present invention, inventor finds that in prior art, at least there are the following problems:
1, automaticity is low, cannot meet large-scale production;
2, lack the effective control to SEI film formation condition, cause the formation effectiveness comparison of lithium battery SEI film general;
3, formation device power consumption is large.
Summary of the invention
The present invention proposes a kind of chemical synthesizing method, by being formed the automatic control of operation in formation of Li-ion batteries process and the SEI film setting up data model to control, thus makes lithium battery have preferably formation effect.
The invention provides a kind of method controlling formation of Li-ion batteries, comprising:
Import or input control parameter; According to described controling parameters, formation device is controlled; Gather environmental parameter, judge that described environmental parameter exceedes predefined parameter scope; If so, adjust controling parameters and formation device is controlled.
When described importing controling parameters is not within the scope of predefined parameter, extracts preset control parameters, according to described preset control parameters, formation device is controlled.
Described controling parameters comprises current parameters, voltage parameter and temperature parameter.
Described predefined parameter scope is voltage parameter range is 3.0V-4.2V, current parameters scope 200mA-600mA and temperature parameter scope 20
oc-35
oc.
When adjusting controling parameters, the record regulation and control time also forms the regulation and control time period, calculates the power consumption of described regulation and control time period.
The step of described importing controling parameters comprises: set up by existing test data and change into model and extract controling parameters; Change into according to extraction controling parameters, carry out power consumption and calculate, select minimum power consumption and change into model.
The described model that changes into is the process control time representing electrochemical parameter (voltage, electric current, temperature) in formation process by a tables of data and correspond, expression way is (U, I, T, t), U represents voltage, and I represents electric current, and T represents battery temperature, t represents the time, employing magnitude of voltage U in this expression procedure control time t, current value I, temperature value T controls Battery formation.
Control a device for formation of Li-ion batteries, it comprises:
System control module, for controlling environmental parameter during Battery formation according to the controling parameters imported;
Change into module, be connected to described system control module, control to change into environmental parameter for the controling parameters provided according to system control module, lithium battery completes formation process changing in module;
Environmental parameter acquisition module, changes into module described in being connected to, and changes into the environmental parameter in module for Real-time Collection;
Data processing module, connects described environmental parameter acquisition module, for the treatment of the image data of environmental parameter acquisition module, judges that environmental parameter exceedes predefined parameter scope, then adjusts controling parameters, data are transferred to system control module and memory module respectively;
Memory module, connects described data processing module, changes into data or test data for storing, and extracts use for system control module.
Described controling parameters comprises current parameters, voltage parameter and temperature parameter.
Described predefined parameter scope is voltage parameter range is 3.0V-4.2V, current parameters scope 200mA-600mA and temperature parameter scope 20
oc-35
oc.
The present invention has following advantage relative to prior art:
1, improve automaticity, make the forming process of lithium battery more reasonable and intelligent;
2, change into environment by control and form preferably SEI film;
3, by the calculating that equipment consumes energy, make the power consumption of each Battery formation more reasonable, improve the utilization ratio of electric energy.
Accompanying drawing explanation
Fig. 1 is embodiment 1 flow chart of battery formation method of the present invention.
Fig. 2 is embodiment 2 flow chart of battery formation method of the present invention.
Fig. 3 is formation of Li-ion batteries control appliance structural representation A of the present invention.
Fig. 4 is formation of Li-ion batteries control appliance structural representation B of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Paper " affecting lithium-ions battery negative pole SEI membrane structure and property qualitative factor " discusses the various factors affecting lithium-ions battery negative pole SEI membrane structure and performance, wherein negative material kind, conductive agent distribution, electrolyte solvent, electrolytic salt, electrolysis additive, impurity, change into the factor such as condition, ambient temperature.Because the condition such as distribution, electrolyte solvent, electrolytic salt, electrolysis additive, impurity of negative material kind, conductive agent just can carry out selecting and processing before Battery formation, and different material parameters and inherent characteristic parameter can be drawn according to the ratio of deployed material.And under comparable conditions, be further enhanced by then can make the formation effect of SEI film to the adjustment changing into conditions and environment temperature.
Refer to Fig. 1, a kind of embodiment 1 of formation of Li-ion batteries method, it comprises the following steps:
S101: import or input control parameter;
Import or input control parameter time, judging controling parameters whether in preset parameter range, is import controling parameters, otherwise imports to have and change into controling parameters corresponding to model;
Changing into model is the process control time representing electrochemical parameter (voltage, electric current, temperature) in formation process by a tables of data and correspond, expression way is (U, I, T, t), U represents voltage, and I represents electric current, and T represents battery temperature, t represents the time, employing magnitude of voltage U in this expression procedure control time t, current value I, temperature value T controls Battery formation.Change into model tormulation for (U
0, I
0, T
0, t
0)->(U
1, I
1, T
1, t
1)->(U
2, I
2, T
2, t
2)->(... )->(U
n, I
n, T
n, t
n) represent from a process control time t
0to another process control time t
1, until complete the t of the process control changing into last work
nthe change of corresponding voltage U, electric current I and temperature value T.
Parameter area refers to the span of default voltage, electric current and temperature; Paper " density functional theory of lithium battery SEI membrane component Raman spectrum and the experimental study of positive electrode " discusses the impact that voltage different in experimental enviroment, electric current and temperature are formed SEI film; And according to the data that these are tested, its preset voltage value scope is U by the present embodiment
a-U
b, pre-set current value scope I
a-I
band preset temperature range T
a-T
b.When any one in the parameter inputted does not belong to this scope, then import the existing parameter changing into model.The existing source changing into model mainly contains: 1, drawn by existing test data, foundation change into model; 2, after system starts, the parameter according to input changes into, and carries out after power consumption calculates, and contrast is selected to consume energy and minimum changed into model; In the present embodiment, system through energy consuming ratio comparatively after automatically can select to consume energy and minimum change into model, extract controling parameters.What the predefined parameter scope of the present embodiment adopted is comparatively original experimental data, and along with the improvement of technique and technology, the data of its predefined parameter scope also can manually be revised further.
Preferably, the preset voltage value scope in the present embodiment is 3.0V-4.2V, pre-set current value scope 200mA-600mA and preset temperature range 20
oc-35
oc.
Above said different materials parameter and inherent characteristic parameter comprise the distribution, electrolyte solvent, electrolytic salt, electrolysis additive, impurity etc. of negative material kind, conductive agent.
S102: formation device is controlled according to described controling parameters;
Import after controling parameters, system is controlled the electric current of correspondence, voltage and temperature by current controller, voltage controller and temperature controller according to the controling parameters changing into model.
Described environmental parameter comprises voltage parameter, current parameters and temperature parameter.
S103: collection environmental parameter; Can produce certain waste heat when the work continued due to whole system, and these waste heats can cause the temperature of whole system to improve, and temperature can have an impact to resistance, causes electric current and voltage also can produce certain change, and then have influence on the environment changed into.System will gather environmental parameter constantly and lasting control changes into environment, to ensure its formation effect.
S104: judge that environmental parameter exceedes predefined parameter scope, be enter S105, otherwise enter S106;
S105: adjustment controling parameters; In the process changed into, the generation of the SEI film of high-quality needs the parameter value changed in environment (mainly comprising the factors such as electric current, voltage and temperature) to control in certain scope; And when changing in the mode of constant current or constant voltage, because temperature in the battery itself can change along with the accumulation of heat, from what, electric current and voltage all can be changed, when the parameter value detected exceeds preset parameter range, then need to regulate and control it, to ensure the build environment of SEI film.
In addition, change on the basis of environment in guarantee, the present invention also assesses its power consumption, and automatically selects to consume energy from the result of assessment and low change into model, in order to be optimized model as next group production.As shown in Figure 2, adjustment controling parameters also records the regulation and control time, and enters S102.Through data processing and relatively after, system controller regulates and controls the environmental parameter changed into according to the controling parameters of model; By the record regulation and control time, the regulation and control time period carried out adjusting at every turn and control to spend can be calculated, and by each instrument power used when this regulation and control time period and regulation and control, can be calculated it at each time period electric energy used according to formula W=UIt.Always can calculate from changing into changing into the electric energy W that end consumes.Like this, the power consumption of regulation and control time period is calculated, just can calculate and change into total energy consumption when secondary.Meanwhile, add up repeatedly the result changing into power consumption after controling parameters importing, the controling parameters of minimum power consumption can be selected.System is compared by the consumption changed into each time again and just the low model (i.e. controling parameters) that changes into of power consumption can be extracted.By this method, constantly can be optimized changing into model, making the lithium battery of mass production can save a large amount of electric energy.
S106: judge to change into whether complete, be terminate to change into, otherwise enter S103;
In general, judging to change into whether complete, can judge according to the time, namely setting its time changed into as starting to end as certain time period gets final product (as 18 hours).
Refer to Fig. 3 and composition graphs 4, a kind of embodiment of formation of Li-ion batteries control appliance, it comprises:
System control module 1, for controlling formation device according to the controling parameters imported;
Change into module 2, be connected to described system control module, the controling parameters for providing according to system control module controls to change into the parameter of environment, and lithium battery completes formation process changing in module;
Environmental parameter acquisition module 3, changes into module described in being connected to, and changes into the environmental parameter in module for Real-time Collection;
Data processing module 4, connects described environmental parameter acquisition module, for the treatment of the image data of environmental parameter acquisition module, judges that environmental parameter exceedes predefined parameter scope, then adjusts controling parameters, data are transferred to system control module and memory module respectively;
Memory module 5, connects described data processing module, changes into data or test data for storing, and extracts use for system control module;
System control module 1 also connects an interactive module 6, and interactive module 6 is for inputting corresponding controling parameters;
System control module 1 also connects a master system 7, for interconnection network, realizes full-range network Long-distance Control and management;
Wherein, system control module, data processing module and memory module can adopt PC to realize its function.
Environmental parameter acquisition module 3 comprises current detector, voltage detector and Temperature Detector.
Current detector, voltage detector, carry out sampling AD analog-to-digital conversion by after traffic filter and signal amplifier process.
Temperature Detector is that thermistor or constantan wire are converted to corresponding temperature data by the signal of telecommunication.
Above-mentioned controling parameters comprises current parameters, voltage parameter and temperature parameter.
On the predefined parameter scope stated be voltage parameter range be 3.0V-4.2V, current parameters scope 200mA-600mA and temperature parameter scope 20
oc-35
oc.
Through data processing and relatively after, system controller regulates and controls the environmental parameter changed into according to the controling parameters of model; By the record regulation and control time, the regulation and control time period carried out adjusting at every turn and control to spend can be calculated, and by each instrument power used when this regulation and control time period and regulation and control, can be calculated it at each time period electric energy used according to formula W=UIt.Always can calculate from changing into changing into the electric energy W that end consumes.Like this, the power consumption of regulation and control time period is calculated, just can calculate and change into total energy consumption when secondary.Meanwhile, add up repeatedly the result changing into power consumption after controling parameters importing, the controling parameters of minimum power consumption can be selected.System is compared by the consumption changed into each time again and just the low model (i.e. controling parameters) that changes into of power consumption can be extracted.By this method, constantly can be optimized changing into model, making the lithium battery of mass production can save a large amount of electric energy.
In the above embodiments, what interactive module 6 input changed into that the parameter of model or master system 7 import changes into model parameter, and transfers data to system control module 1, and whether the parameter value of contrast input is U in preset voltage value scope by system control module 1
a-U
b, current value range I
a-I
band temperature range T
a-T
bscope in, be draw controling parameters, otherwise test gained before importing change into model parameter, and draw controling parameters; System control module 1 is controlled changing into corresponding electric current, voltage and temperature in module 2 by current controller, voltage controller and temperature controller according to the controling parameters drawn.Current detector in environmental parameter acquisition module 3, voltage detector and Temperature Detector gather corresponding electric current, voltage and temperature, the data collected are sent to data processing module 4, data processing module 4 calculates sampling parameter error according to the data collected, and finally judges whether to exceed error allowed band.When exceeding error allowed band, the record regulation and control moment, and send to system control module 1 and memory module 5 respectively.System control module 1, according to this information, regulates and controls the environment changing into module 2 again, then repeats this process until changed into always.Wherein, memory module 5 can record the time regulated and controled each time, data processing module 4 according to this time and system control module regulate and control be electric current, voltage value, the electric energy that whole formation process consumes can be calculated, and in memory module 5, record this change into model.
Mode is identical therewith maybe can be equal to for other embodiments and the most contents in above elaboration or function, does not repeat them here.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (9)
1. control a method for formation of Li-ion batteries, comprising:
S101: import or input control parameter;
S102: formation device is controlled according to described controling parameters;
S103: gather environmental parameter;
S104: judge that described environmental parameter exceedes predefined parameter scope; Be enter S105, otherwise enter S106;
S105: adjustment controling parameters also controls formation device;
S106: judge to change into whether complete, be terminate to change into, otherwise enter S103;
When adjusting controling parameters, the record regulation and control time also forms the regulation and control time period, calculates the power consumption of described regulation and control time period.
2. the method for control formation of Li-ion batteries according to claim 1, is characterized in that, when described importing or input control parameter be not within the scope of predefined parameter, extract preset control parameters, controls according to described preset control parameters to formation device.
3. the method for control formation of Li-ion batteries according to claim 1 and 2, is characterized in that, described controling parameters comprises current parameters, voltage parameter and temperature parameter.
4. the method for control formation of Li-ion batteries according to claim 3, is characterized in that, the scope of described controling parameters is voltage parameter range 3.0V-4.2V, current parameters scope 200mA-600mA and temperature parameter scope 20 DEG C-35 DEG C.
5. the method for control formation of Li-ion batteries according to claim 1, calculates the power consumption of described regulation and control time period, calculates total energy consumption, and adds up repeatedly the result changing into power consumption after controling parameters importing, selects the controling parameters of minimum power consumption.
6. control a device for formation of Li-ion batteries, it comprises:
System control module, for controlling environmental parameter during Battery formation according to the controling parameters imported;
Change into module, be connected to described system control module, control to change into environmental parameter for the controling parameters provided according to system control module, lithium battery completes formation process changing in module;
Environmental parameter acquisition module, changes into module described in being connected to, and when changing into for not completing when lithium battery, Real-time Collection changes into the environmental parameter in module;
Data processing module, connect described environmental parameter acquisition module, for the treatment of the image data of environmental parameter acquisition module, and data are transferred to system control module and memory module respectively, described system control module is also for adjusting controling parameters in real time according to image data and controlling formation device; When adjusting controling parameters, the record regulation and control time also forms the regulation and control time period, calculates the power consumption of described regulation and control time period;
Memory module, connects described data processing module, changes into data or test data for storing, and extracts use for system control module.
7. the device of control formation of Li-ion batteries according to claim 6, is characterized in that, described controling parameters comprises current parameters, voltage parameter and temperature parameter.
8. the device of control formation of Li-ion batteries according to claim 7, is characterized in that, the scope of described controling parameters is voltage parameter range is 3.0V-4.2V, current parameters scope 200mA-600mA and temperature parameter scope 20 DEG C-35 DEG C.
9. according to the device of the arbitrary described control formation of Li-ion batteries of claim 6-8, it is characterized in that, the power consumption of described regulation and control time period is calculated, calculates total energy consumption, and the result changing into power consumption of adding up repeatedly after controling parameters importing, select the controling parameters of minimum power consumption.
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| JP6414580B2 (en) * | 2016-10-14 | 2018-10-31 | トヨタ自動車株式会社 | Lithium ion secondary battery capacity recovery system |
| CN106450428B (en) * | 2016-10-20 | 2019-04-02 | 东莞市伟升机械设备科技有限公司 | A kind of lithium ion battery hot pressing chemical conversion control method |
| CN108091939A (en) * | 2018-01-31 | 2018-05-29 | 河南国能电池有限公司 | Formation cabinet and chemical synthesizing method |
| CN110532748B (en) * | 2019-08-27 | 2022-07-08 | Oppo（重庆）智能科技有限公司 | Battery management method and related product |
| CN110806718A (en) * | 2019-11-28 | 2020-02-18 | 石河子众金电极箔有限公司 | Electric control system of formation production line |
| CN116359763B (en) * | 2023-06-01 | 2023-08-04 | 深圳和润达科技有限公司 | Intelligent analysis method and device for chemical component capacity energy consumption |
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