CN112242565A - Low-voltage platform standing method for lithium ion power battery - Google Patents
Low-voltage platform standing method for lithium ion power battery Download PDFInfo
- Publication number
- CN112242565A CN112242565A CN202011145493.XA CN202011145493A CN112242565A CN 112242565 A CN112242565 A CN 112242565A CN 202011145493 A CN202011145493 A CN 202011145493A CN 112242565 A CN112242565 A CN 112242565A
- Authority
- CN
- China
- Prior art keywords
- standing
- lithium
- lithium battery
- low
- ion power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a method for standing a low-voltage platform of a lithium ion power battery, and relates to the field of methods for standing the low-voltage platform of the lithium ion power battery. The method for standing the low-voltage platform of the lithium ion power battery comprises the following steps: step 1, injecting lithium battery electrolyte into an uncharged lithium battery, packaging, and then transferring to a standing area for standing to enable a pole piece to be fully soaked; step 2, charging the lithium battery until 3.2V is reached; and 3, standing the charged lithium battery at a high temperature, transferring the lithium battery to a standing area for standing for 12 hours after packaging in the step 1, charging the lithium battery by adopting 0.01C in the step 2, charging the lithium battery by adopting 0.02C in the step 2, and standing the charged lithium battery at the high temperature for 10 hours in the step 3, wherein the temperature of standing at the high temperature is 40-50 ℃. The lithium battery is charged for the first time, when the voltage reaches 3.2V, the SEI film is basically formed at the moment, and the SEI film with uniform thickness can be obtained after high-temperature standing.
Description
Technical Field
The invention relates to the field of a low-voltage platform standing method of a lithium ion power battery, in particular to a low-voltage platform standing method of a lithium ion power battery.
Background
In the first charge-discharge process of a lithium ion battery, an electrode material and an electrolyte react on a solid-liquid phase interface to form a passivation layer (SEI) covering the surface of the electrode material, the passivation layer is an interface layer and has the characteristics of a solid electrolyte, and is an electronic insulator but an excellent conductor of lithium ions, and the lithium ions can be freely inserted and extracted through the passivation layer, so that the passivation layer is called a solid electrolyte interface (solid electrolyte interface), which is called an SEI film for short.
The SEI film is composed of insoluble products of reductive decomposition of components in an electrolyte, the decomposition voltages of the components in the electrolyte are different, and the decomposition rates of the components of the electrolyte are also different at different voltages. In this case, if the electrode is coated unevenly or the slurry is not uniform, the conductive agent is dispersed unevenly or the like, which causes the polarization of each portion of the electrode sheet to be different during the charging process, i.e., the voltage distribution is not uniform. Therefore, the decomposition and deposition rates of the electrolyte at each part of the electrode sheet are different, the thickness and the composition of the SEI film are different, so that the SEI film is not uniform, the conductivity of each part is different, in the lithium storage battery, the performance of the SE film covering the surface of the lithium electrode directly controls the electrochemical behavior of the lithium electrode, the cycle life of the battery strongly depends on the irreversible capacity in the lithium dissolution/deposition process, and the SEI film forming process plays an important role.
Experiments show that the SEI layer is formed from a formation voltage of 2.5V approximately, and when the formation voltage is more than 2.5V, the total amount and the types of generated gases are rapidly increased; when the voltage exceeds 3.8V, a stable SEI layer is basically formed on the surface of the negative electrode of the battery, therefore, the reductive decomposition rate of the electrolyte solvent is gradually slowed down, the total amount of generated gas is sharply decreased on the contrary, wherein, the interval between 3.0V and 3.5V is the main forming voltage interval of SEI layer, in this voltage range, the gas component generated is mainly C2H4, and therefore it can be considered that, the SEI layer is formed mainly by the reductive decomposition of vinyl carbonate (EC) in the electrolyte solvent, wherein the reaction process comprises a one-electron reaction and a two-electron reaction, and the reactions are respectively as follows: PC + 2 e- + 2Li + → CH3CH (OCO2Li) CH2 (OCO2Li) ↓ + CH3CH = CH2 ↓;2EC + 2 e- + 2Li + → (CH2OCO2Li) 2 ↓ + CH2 = CH2 ↓.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for standing a low-voltage platform of a lithium ion power battery, which solves the problems of insufficient thickness and compactness of the formed SEI film.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a low-voltage platform standing method for a lithium ion power battery comprises the following steps:
step 1, injecting lithium battery electrolyte into an uncharged lithium battery, packaging, and then transferring to a standing area for standing to enable a pole piece to be fully soaked;
step 2, charging the lithium battery until 3.2V is reached;
and 3, standing the charged lithium battery at a high temperature.
Preferably, the packaged product obtained in the step 1 is transferred to a standing area for standing for 12 hours.
Preferably, the charging is performed by using 0.01C in the step 2.
Preferably, the charging is performed by using 0.02C in the step 2.
Preferably, the charged lithium battery is subjected to high-temperature standing for 10 hours in the step 3, and the temperature of the high-temperature standing is 40-50 ℃.
(III) advantageous effects
The invention provides a method for standing a low-voltage platform of a lithium ion power battery. The method has the following beneficial effects:
1. according to the invention, the lithium battery is charged for the first time, when the voltage reaches 3.2V, the SEI film is basically formed, and the SEI film with sufficient thickness and compactness can be obtained after high-temperature standing.
Drawings
FIG. 1 is a diagram showing the relationship between the total amount of gas generated by the lithium ion battery of the present invention at different voltages.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a method for standing a low-voltage platform of a lithium ion power battery, which comprises the following steps: the method comprises the following steps:
step 1, injecting lithium battery electrolyte into an uncharged lithium battery, packaging, and then transferring to a standing area for standing for 12 hours to fully soak a pole piece;
step 2, charging the lithium battery by adopting 0.01C until 3.2V is reached;
and 3, standing the charged lithium battery at high temperature for 10 hours, wherein the temperature of the high-temperature standing is 40-50 ℃.
Example two:
the embodiment of the invention provides a method for standing a low-voltage platform of a lithium ion power battery, which comprises the following steps: the method comprises the following steps:
step 1, injecting lithium battery electrolyte into an uncharged lithium battery, packaging, and then transferring to a standing area for standing for 12 hours to fully soak a pole piece;
step 2, charging the lithium battery by adopting 0.02C until 3.2V is reached;
and 3, standing the charged lithium battery at high temperature for 10 hours, wherein the temperature of the high-temperature standing is 40-50 ℃.
It can be seen from fig. 1 that when the voltage is between 3.0V and 3.5V, the gas production rate of the lithium ion battery is the greatest, which indicates that the reaction is the most severe, and when the voltage reaches 3.2V, the gas production rate basically reaches the peak value, which indicates that the SEI film is basically formed; when the voltage of the lithium ion battery is kept at 3.2V, the internal reaction of the battery is the most active, the SEI film has enough thickness and compactness when the lithium ion battery is placed statically under the condition, the co-insertion of solvent molecules can be prevented, the stability of electrode cycle is ensured, and the SEI film with enough thickness and compactness can be obtained in the first embodiment and the second embodiment.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A method for standing a low-voltage platform of a lithium ion power battery is characterized by comprising the following steps: the method comprises the following steps:
step 1, injecting lithium battery electrolyte into an uncharged lithium battery, packaging, and then transferring to a standing area for standing to enable a pole piece to be fully soaked;
step 2, charging the lithium battery until 3.2V is reached;
and 3, standing the charged lithium battery at a high temperature.
2. The method for standing the low-voltage platform of the lithium-ion power battery according to claim 1, wherein the method comprises the following steps: and (3) after packaging in the step (1), transferring to a standing area for standing for 12 h.
3. The method for standing the low-voltage platform of the lithium-ion power battery according to claim 1, wherein the method comprises the following steps: and in the step 2, charging is carried out by adopting 0.01C.
4. The method for standing the low-voltage platform of the lithium-ion power battery according to claim 1, wherein the method comprises the following steps: and in the step 2, charging is carried out by adopting 0.02C.
5. The method for standing the low-voltage platform of the lithium-ion power battery according to claim 1, wherein the method comprises the following steps: and 3, standing the charged lithium battery at high temperature for 10 hours at the temperature of 40-50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011145493.XA CN112242565A (en) | 2020-10-23 | 2020-10-23 | Low-voltage platform standing method for lithium ion power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011145493.XA CN112242565A (en) | 2020-10-23 | 2020-10-23 | Low-voltage platform standing method for lithium ion power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112242565A true CN112242565A (en) | 2021-01-19 |
Family
ID=74169384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011145493.XA Pending CN112242565A (en) | 2020-10-23 | 2020-10-23 | Low-voltage platform standing method for lithium ion power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112242565A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150060290A1 (en) * | 2013-08-30 | 2015-03-05 | Southwest Research Institute | Dynamic Formation Protocol for Lithium-Ion Battery |
| CN104577044A (en) * | 2014-11-18 | 2015-04-29 | 深圳市金润能源材料有限公司 | Lithium titanate battery and preparation method thereof |
| CN106025364A (en) * | 2016-06-30 | 2016-10-12 | 中天储能科技有限公司 | Lithium-capacity low-consumption lithium-ion battery formation method |
| CN106025370A (en) * | 2016-08-02 | 2016-10-12 | 天津力神电池股份有限公司 | Formation method of soft package lithium battery |
| CN110380146A (en) * | 2019-06-11 | 2019-10-25 | 中国电力科学研究院有限公司 | A kind of lithium ion battery targeting chemical synthesizing method and lithium ion battery |
-
2020
- 2020-10-23 CN CN202011145493.XA patent/CN112242565A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150060290A1 (en) * | 2013-08-30 | 2015-03-05 | Southwest Research Institute | Dynamic Formation Protocol for Lithium-Ion Battery |
| CN104577044A (en) * | 2014-11-18 | 2015-04-29 | 深圳市金润能源材料有限公司 | Lithium titanate battery and preparation method thereof |
| CN106025364A (en) * | 2016-06-30 | 2016-10-12 | 中天储能科技有限公司 | Lithium-capacity low-consumption lithium-ion battery formation method |
| CN106025370A (en) * | 2016-08-02 | 2016-10-12 | 天津力神电池股份有限公司 | Formation method of soft package lithium battery |
| CN110380146A (en) * | 2019-06-11 | 2019-10-25 | 中国电力科学研究院有限公司 | A kind of lithium ion battery targeting chemical synthesizing method and lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111244546B (en) | Electrolyte for lithium ion battery suitable for quick charging and lithium ion battery | |
| CN103117412B (en) | Lithium ion battery and chemical synthesizing method thereof | |
| CN108615955B (en) | Formation method of lithium iron phosphate battery | |
| CN102280610B (en) | Liquid-injection process of low-temperature lithium ion battery cell | |
| CN110265713B (en) | Ternary positive electrode material electrolyte of high-voltage lithium ion battery and preparation method thereof | |
| CN104810557A (en) | Preparation method of lithium ion battery | |
| CN110931843B (en) | Novel lithium metal negative electrode high-voltage positive electrode solid-liquid battery | |
| CN113078354A (en) | Ternary lithium ion battery non-aqueous electrolyte and lithium ion battery thereof | |
| WO2022027223A1 (en) | Electronic device, charging method for electrochemical device, terminal and storage medium | |
| CN113517470A (en) | High-nickel high-voltage ternary lithium ion battery non-aqueous electrolyte and lithium ion battery | |
| CN110931871A (en) | High-temperature-resistant electrolyte adaptive to silicon-carbon negative electrode material for lithium ion battery | |
| CN113629365A (en) | Electrolyte injection method and lithium ion battery | |
| CN111129598A (en) | High-voltage lithium ion battery non-aqueous electrolyte and lithium ion battery thereof | |
| CN107579301B (en) | Formation process of lithium iron phosphate power battery | |
| KR20150051557A (en) | A lithium secondary battery with enhanced performance | |
| CN111668551A (en) | High-temperature high-pressure electrolyte matched with silicon-carbon negative electrode material lithium ion battery | |
| CN111276755A (en) | Preparation method of lithium ion battery with long storage performance | |
| CN114284562A (en) | Method for opening formation of lithium ion battery and lithium ion battery | |
| CN112803012B (en) | Lithium ion battery cathode, preparation method and application thereof, and lithium ion battery | |
| CN110707389B (en) | Formation method of lithium ion battery with nickel cobalt lithium manganate anode | |
| CN112490524A (en) | Formation method of soft package lithium ion battery and soft package lithium ion battery | |
| CN112242565A (en) | Low-voltage platform standing method for lithium ion power battery | |
| CN113889667B (en) | High-voltage electrolyte adaptive to lithium cobaltate battery capable of being charged quickly and application of high-voltage electrolyte | |
| CN111092199B (en) | Method for simultaneously improving over-discharge capacity, low-voltage discharge capacity and storage performance of lithium battery | |
| CN110911767A (en) | Formation method of lithium ion battery with composite anode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210119 |