CN108539304A - A kind of chemical synthesizing method of power-type lithium ion battery - Google Patents
A kind of chemical synthesizing method of power-type lithium ion battery Download PDFInfo
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- CN108539304A CN108539304A CN201810251546.2A CN201810251546A CN108539304A CN 108539304 A CN108539304 A CN 108539304A CN 201810251546 A CN201810251546 A CN 201810251546A CN 108539304 A CN108539304 A CN 108539304A
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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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- 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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- 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 present invention relates to a kind of chemical synthesizing methods of power-type lithium ion battery, included the first charging stage successively by step, second charging stage, the third charging stage, 4th charging stage, 5th charging stage, the charging current of wherein described first charging stage is 0.01~0.03C, the charging current of second charging stage is 0.02~0.06C, the charging current of the third charging stage is 0.02~0.08C, the charging current of 4th charging stage is 0.02~0.1C, and the charging current of the 5th charging stage is 0.1~0.2C.The present invention makes additive in the more abundant of the film formation reaction progress on graphite cathode surface by the chemical synthesizing method of constant current constant voltage, advantageously form form compact and stable SEI films, improve the stability of SEI films, and pass through the size of current before control constant pressure point, optimize technique shortens the chemical conversion time, and improving production capacity reduces manufacturing cost.
Description
Technical field
The invention belongs to the manufacturing fields of lithium ion battery, and in particular to a kind of chemical conversion of power-type lithium ion battery
Method.
Background technology
As countries in the world government launches respectively the policy of promotion energy-saving and emission-reduction, orthodox car enterprise is just from production with internal combustion
Machine is the automobile of power source, and gradually the center of gravity by production and research and development is turned to using secondary cell as the pure electric automobile of power source.
Wherein, using LiFePO 4 as positive electrode, artificial graphite be cathode material power-type lithium ion battery, have raw material at
This is low, manufacturing process is ripe, has extended cycle life and the advantages that security performance stablizes, although being less than ternary material in energy density
Material is as positive lithium ion powered battery, but its higher cost performance and the manufacturing cost that constantly reduces, make its
Power-type lithium ion battery field has the status that can not shake.
It removes outside lithium ion battery material price itself, during lithium ion battery manufactures, is used to form shared by SEI films
Cost highest（Electricity during energy consumption that high temperature is shelved and chemical conversion）.During battery initial charge（Chemical conversion）About 10%
Electricity is used to form SEI films.The nature of the SEI films formed during chemical conversion determines cycle life, the safety of battery
Capacity retention ratio and reversible capacity during capable of, storing.Due to expansion/contraction of graphite cathode during battery charging and discharging, bear
The continuous variation of pole material volume itself, this requires SEI films to have certain intensity again and have certain toughness, avoids big
The graphite of area is exposed in electrolyte, and forming Li+ of the SEI films consumption in anode and electrolyte again leads to irreversible appearance
Amount.In addition, SEI films are form compact and stable in theory and electronic isolation, actually due to the transition of electronics and SEI film outer layers（It leans on
The loose porous layer of nearly electrolyte）Constantly thicken, cause irreversible capacity and deterioration of safety.In addition, in positive electrode
The dissolving of metal ion is easy to be reduced with the diffusion mobility of Li+ ions in negative terminal surface, and destroys the structure of SEI films.
Therefore, necessary to the research work of the SEI films on graphite negative electrode of lithium ion battery surface.
Under normal circumstances, SEI films are mainly by inorganic lithium compound（Li2CO3）And organo-lithium compound（ROLi、
ROCO2Li）And some organic polymers composition.Intercalation potential during chemical conversion will be less than the reduction electricity of solvent and additive
Position.In general, the SEI films of additive being decomposed to form are thin and compact, there is certain toughness, in graphite surface strong adhesive force.With
The raising of cell voltage, cathode potential continuously decreases, and solvent generates metastable organolithium under initial single electron reaction
Compound (CH2OCO2Li) 2, cell voltage continue that the big inorganic lithium of mechanical stability of two electron reactions generation occurs after improving
Compound（Li2CO3）, when reaction potential reaches the reaction of embedding lithium, the ion with certain toughness that the SEI films that generate at this time are
The high ROCO2Li of conductivity, therefore, can by the chemical synthesizing method of constant current constant voltage come regulate and control the patterns of SEI films, chemical composition and
Mechanical characteristic.
Existing chemical synthesis technology uses two benches constant-current charge, and time-consuming for chemical conversion, is unable to control containing for beneficiating ingredient in SEI films
Amount.
Invention content
The purpose of the present invention is to provide a kind of chemical synthesizing methods of power-type lithium ion battery, improve the stability of SEI films,
And by the size of current before control constant pressure point, optimize technique shortens the chemical conversion time, and improving production capacity reduces manufacturing cost.
To achieve the above object, present invention employs following technical schemes：
A kind of chemical synthesizing method of power-type lithium ion battery, included the first charging stage successively by step, the second charging stage, and the
Three charging stages, the 4th charging stage, the 5th charging stage, wherein the charging current of first charging stage be 0.01~
The charging current of 0.03C, second charging stage are 0.02~0.06C, and the charging current of the third charging stage is
The charging current of 0.02~0.08C, the 4th charging stage are 0.02~0.1C, and the charging current of the 5th charging stage is
0.1~0.2C.
Further, the deadline of first charging stage is 5min.
Further, the blanking voltage of second charging stage be 2.4~2.6V, cut-off current be 0.005~
0.01C, deadline are 10~30min.
Further, the blanking voltage of the third charging stage is 2.6~2.9V, cut-off current 0.01C, when cut-off
Between be 20~120min.
Further, the blanking voltage of the 4th charging stage is 2.9~3.3V, cut-off current 0.01C, when cut-off
Between be 20~120min.
Further, the deadline of the 5th charging stage is 60~120min.
Further, the positive electrode of the power-type lithium ion battery is LiFePO 4, and negative material is artificial stone
Ink.
As shown from the above technical solution, the present invention has the following advantages：
（1）By the chemical synthesizing method of constant current constant voltage additive is more filled what the film formation reaction on graphite cathode surface carried out
Point, advantageously form form compact and stable SEI films（Main component is lithium alkylide）, and SEI films can be improved in graphite surface
Adhesive force and toughness, while the gas generated by film formation reaction during chemical conversion can be reduced.
（2）When current potential is higher, SEI films intermediate ion conductivity is higher and the higher Li of hardness2CO3It initially forms and adjoint
The precipitation for gas carries out constant pressure chemical conversion under the current potential and is conducive to generate more Li2CO3, while it is sudden and violent to the precipitation because of gas
The graphite being exposed in electrolyte carries out the reparation and regeneration of SEI films, obtains more form compact and stable SEI films.
（3）During battery repeated charge, due to embedding lithium/de- lithium of graphite cathode so that graphite constantly expansion/receipts
Contracting, this just needs SEI not only to have very high intensity, and needs certain toughness, using the chemical conversion of multistage constant current constant voltage
Method can regulate and control inorganic lithium compound（Li2CO3）With organolithium（Lithium alkylide）Between ratio.So that during battery charging and discharging
Because SEI films rupture regeneration due to generates irreversible capacity reduction, improve the cyclical stability of battery, can be by constant current
The optimising and adjustment chemical conversion time of size of current during constant pressure improves production capacity.
Description of the drawings
Fig. 1 be Battery formation of the present invention during dQ/dV~V curve graphs.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of chemical synthesizing method of power-type lithium ion battery of the present invention, includes the first charging rank successively by step
Section, the second charging stage, the third charging stage, the 4th charging stage, the 5th charging stage, wherein first charging stage
Charging current is 0.01~0.03C, and the charging current of second charging stage is 0.02~0.06C, the third charging rank
The charging current of section is 0.02~0.08C, and the charging current of the 4th charging stage is 0.02~0.1C, the 5th charging stage
Charging current be 0.1~0.2C.
Embodiment 1
Battery after high temperature is infiltrated, is internalized into constant temperature chemical conversion room, and the specific step that is melted into is:
（1）First charging stage, with 0.01C constant-current charges, deadline 5min；
（2）Second charging stage, with 0.02C constant-current constant-voltage chargings, blanking voltage 2.4V, cut-off current 0.005C, cut-off
Time is 30min；
（3）The third charging stage, with 0.02C constant-current constant-voltage chargings, blanking voltage 2.9V, cut-off current 0.01C, when cut-off
Between be 120min；
（4）4th charging stage, with 0.02C constant-current constant-voltage chargings, blanking voltage 3.2V, cut-off current 0.01C, when cut-off
Between be 120min；
（5）5th charging stage, with 0.2C constant-current constant-voltage chargings, deadline 60min.
Embodiment 2
Battery after high temperature is infiltrated, is internalized into constant temperature chemical conversion room, and the specific step that is melted into is:
（1）First charging stage, with 0.02C constant-current charges, deadline 5min；
（2）Second charging stage, with 0.03C constant-current constant-voltage chargings, blanking voltage 2.55V, cut-off current 0.01C, cut-off
Time is 25min；
（3）The third charging stage, with 0.03C constant-current constant-voltage chargings, blanking voltage 2.8V, cut-off current 0.01C, when cut-off
Between be 100min；
（4）4th charging stage, with 0.03C constant-current constant-voltage chargings, blanking voltage 3.1V, cut-off current 0.01C, when cut-off
Between be 100min；
（5）5th charging stage, with 0.15C constant-current constant-voltage chargings, deadline 100min.
Embodiment 3
Battery after high temperature is infiltrated, is internalized into constant temperature chemical conversion room, and the specific step that is melted into is:
（1）First charging stage, with 0.03C constant-current charges, deadline 5min；
（2）Second charging stage, with 0.04C constant-current constant-voltage chargings, blanking voltage 2.5V, cut-off current 0.01C, when cut-off
Between be 20min；
（3）The third charging stage, with 0.04C constant-current constant-voltage chargings, blanking voltage 2.75V, cut-off current 0.01C, cut-off
Time is 80min；
（4）4th charging stage, with 0.04C constant-current constant-voltage chargings, blanking voltage 3.05V, cut-off current 0.01C, cut-off
Time is 80min；
（5）5th charging stage, with 0.1C constant-current constant-voltage chargings, deadline 120min.
Embodiment 4
Battery after high temperature is infiltrated, is internalized into constant temperature chemical conversion room, and the specific step that is melted into is:
（1）First charging stage, with 0.02C constant-current charges, deadline 5min；
（2）Second charging stage, with 0.05C constant-current constant-voltage chargings, blanking voltage 2.6V, cut-off current 0.01C, when cut-off
Between be 15min；
（3）The third charging stage, with 0.06C constant-current constant-voltage chargings, blanking voltage 2.8V, cut-off current 0.01C, when cut-off
Between be 60min；
（4）4th charging stage, with 0.06C constant-current constant-voltage chargings, blanking voltage 2.9V, cut-off current 0.01C, when cut-off
Between be 60min；
（5）5th charging stage, with 0.2C constant-current constant-voltage chargings, deadline 60min.
Embodiment 5
Battery after high temperature is infiltrated, is internalized into constant temperature chemical conversion room, and the specific step that is melted into is:
（1）First charging stage, with 0.02C constant-current charges, deadline 5min；
（2）Second charging stage, with 0.06C constant-current constant-voltage chargings, blanking voltage 2.6V, cut-off current 0.01C, when cut-off
Between be 10min；
（3）The third charging stage, with 0.08C constant-current constant-voltage chargings, blanking voltage 2.9V, cut-off current 0.01C, when cut-off
Between be 20min；
（4）4th charging stage, with 0.1C constant-current constant-voltage chargings, blanking voltage 3.3V, cut-off current 0.01C, when cut-off
Between be 20min；
（5）5th charging stage, with 0.2C constant-current constant-voltage chargings, deadline 30min.
Embodiment 6
Battery after high temperature is infiltrated, is internalized into constant temperature chemical conversion room, and the specific step that is melted into is:
（1）First charging stage, with 0.02C constant-current charges, deadline 5min；
（2）Second charging stage, with 0.06C constant-current constant-voltage chargings, blanking voltage 2.6V, cut-off current 0.01C, when cut-off
Between be 10min；
（3）The third charging stage, with 0.08C constant-current constant-voltage chargings, blanking voltage 2.8V, cut-off current 0.01C, when cut-off
Between be 100min；
（4）4th charging stage, with 0.1C constant-current constant-voltage chargings, blanking voltage 3.1V, cut-off current 0.01C, when cut-off
Between be 40min；
（5）5th charging stage, with 0.1C constant-current constant-voltage chargings, deadline 120min.
Embodiment 7
Battery after high temperature is infiltrated, is internalized into constant temperature chemical conversion room, and the specific step that is melted into is:
（1）First charging stage, with 0.02C constant-current charges, deadline 5min；
（2）Second charging stage, with 0.06C constant-current constant-voltage chargings, blanking voltage 2.6V, cut-off current 0.01C, when cut-off
Between be 30min；
（3）The third charging stage, with 0.08C constant-current constant-voltage chargings, blanking voltage 2.8V, cut-off current 0.01C, when cut-off
Between be 30min；
（4）4th charging stage, with 0.1C constant-current constant-voltage chargings, blanking voltage 3.05V, cut-off current 0.01C, when cut-off
Between be 120min；
（5）5th charging stage, with 0.1C constant-current constant-voltage chargings, deadline 120min.
Attached drawing 1 be with V~dQ/dV curves of the electric current constant-current charge 4h of 0.02C, it can be seen from the figure that solvent with add
It is respectively 2.2V and 2.7V to add the initial reduction current potential of agent, and intercalation potential starts after 3.15V.It therefore can be according to reaction electricity
Position is different, reasonably selects constant pressure point, achieve the purpose that optimize SEI membranizations in groups at control pattern compactness.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (7)
1. a kind of chemical synthesizing method of power-type lithium ion battery, it is characterised in that：Included the first charging stage successively by step, the
Two charging stages, third charging stage, the 4th charging stage, the 5th charging stage, wherein the charging of first charging stage
Electric current is 0.01~0.03C, and the charging current of second charging stage is 0.02~0.06C, the third charging stage
Charging current is 0.02~0.08C, and the charging current of the 4th charging stage is 0.02~0.1C, the 5th charging stage
Charging current be 0.1~0.2C.
2. the chemical synthesizing method of power-type lithium ion battery according to claim 1, it is characterised in that：The first charging rank
The deadline of section is 5min.
3. the chemical synthesizing method of power-type lithium ion battery according to claim 1, it is characterised in that：The second charging rank
The blanking voltage of section is 2.4~2.6V, and cut-off current is 0.005~0.01C, and deadline is 10~30min.
4. the chemical synthesizing method of power-type lithium ion battery according to claim 1, it is characterised in that：The third charging rank
The blanking voltage of section is 2.6~2.9V, and cut-off current 0.01C, deadline is 20~120min.
5. the chemical synthesizing method of power-type lithium ion battery according to claim 1, it is characterised in that：The 4th charging rank
The blanking voltage of section is 2.9~3.3V, and cut-off current 0.01C, deadline is 20~120min.
6. the chemical synthesizing method of power-type lithium ion battery according to claim 1, it is characterised in that：The 5th charging rank
The deadline of section is 60~120min.
7. the chemical synthesizing method of power-type lithium ion battery according to claim 1, it is characterised in that：The power type lithium from
The positive electrode of sub- battery is LiFePO 4, and negative material is artificial graphite.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112236918A (en) * | 2020-03-24 | 2021-01-15 | 宁德新能源科技有限公司 | Method for charging electrochemical device, electronic device, and readable storage medium |
| CN115207502A (en) * | 2022-09-14 | 2022-10-18 | 武汉亿纬储能有限公司 | Constant-voltage formation process of lithium battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1444303A (en) * | 2002-03-08 | 2003-09-24 | 居永明 | Repeatedly chargeable-dischargeable lithium ion power cell and its production method |
| CN102324572A (en) * | 2011-09-27 | 2012-01-18 | 奇瑞汽车股份有限公司 | Formation method for power lithium ion battery |
| CN103943893A (en) * | 2014-03-25 | 2014-07-23 | 超威电源有限公司 | Lead-acid battery container formation technology |
| CN106785148A (en) * | 2017-03-15 | 2017-05-31 | 盐城工学院 | A kind of chemical synthesizing method and lithium rechargeable battery |
-
2018
- 2018-03-26 CN CN201810251546.2A patent/CN108539304A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1444303A (en) * | 2002-03-08 | 2003-09-24 | 居永明 | Repeatedly chargeable-dischargeable lithium ion power cell and its production method |
| CN102324572A (en) * | 2011-09-27 | 2012-01-18 | 奇瑞汽车股份有限公司 | Formation method for power lithium ion battery |
| CN103943893A (en) * | 2014-03-25 | 2014-07-23 | 超威电源有限公司 | Lead-acid battery container formation technology |
| CN106785148A (en) * | 2017-03-15 | 2017-05-31 | 盐城工学院 | A kind of chemical synthesizing method and lithium rechargeable battery |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112236918A (en) * | 2020-03-24 | 2021-01-15 | 宁德新能源科技有限公司 | Method for charging electrochemical device, electronic device, and readable storage medium |
| WO2021189241A1 (en) * | 2020-03-24 | 2021-09-30 | 东莞新能安科技有限公司 | Method for charging electrochemical device, electronic device, and readable storage medium |
| CN115207502A (en) * | 2022-09-14 | 2022-10-18 | 武汉亿纬储能有限公司 | Constant-voltage formation process of lithium battery |
| CN115207502B (en) * | 2022-09-14 | 2022-12-13 | 武汉亿纬储能有限公司 | Constant-voltage formation process of lithium battery |
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