CN111384447A - Rapid formation and grading method for cylindrical lithium battery - Google Patents
Rapid formation and grading method for cylindrical lithium battery Download PDFInfo
- Publication number
- CN111384447A CN111384447A CN201811633654.2A CN201811633654A CN111384447A CN 111384447 A CN111384447 A CN 111384447A CN 201811633654 A CN201811633654 A CN 201811633654A CN 111384447 A CN111384447 A CN 111384447A
- Authority
- CN
- China
- Prior art keywords
- voltage
- upper limit
- constant
- limit voltage
- constant current
- 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
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
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the field of batteries, in particular to a rapid formation and capacity grading method for a cylindrical lithium battery, which is used for simultaneously carrying out formation and capacity grading processes and comprises the following detailed steps of ① 0.1.1C constant-current charging, upper limit voltage of 3.5V, ② 0.2.2C constant-current charging, upper limit voltage of 3.9V, ③ 0.5.5C constant-current charging, upper limit voltage of 4.2V, ④ 0.5C constant-current discharging and cut-off voltage of 2.75V, ⑤ - ⑥ are capacity grading processes to obtain capacity C, ⑤ 0.5.5C constant-current constant-voltage charging, upper limit voltage of 4.2V, cut-off current of 0.05C, ⑥ 1C constant-current discharging, cut-off voltage of 2.75V, ⑦ 0.5.5C constant-current charging, upper limit voltage of 3.65V and cut-off current of 0.05C, good product ranges of V1 and V2 are set, defective products are graded through C, R, K, grading is carried out, the same purpose is achieved, and the production process is greatly simplified, and the production period is greatly shortened.
Description
Technical Field
The invention relates to the field of batteries, in particular to a rapid formation and capacity grading method for a cylindrical lithium battery.
Background
With the rapid development of science and technology and the continuous progress of human society, the demand of people for energy is increasing. The cylindrical lithium battery is a new green energy product and is concerned by much. But the cycle from production to finished product to matching is long, which seriously restricts the development. With the longest cycle from finished product to matched set.
At present, more methods are used for formation and volume grading. Wherein Xu Guo Guang[1]Et al propose reduction of cycle times and process parameters by formation and volume divisionPreferably to achieve the purpose of shortening the production period.
Reference documents: xu national light et al, a rapid formation and content-grading method for cylindrical lithium batteries [ P ]. CN 105609889 A.2016.05.25.
The existing process has the defects that the process is relatively complicated, the capacity grading process does not charge the battery cell to a full-charge state, the standard capacity of the battery cell can be reflected by full charge and discharge, and some bad battery cells can be reflected in the full-charge state.
Disclosure of Invention
The purpose of the invention is as follows: in order to provide a quick formation and capacity grading method for a cylindrical lithium battery with a better effect, specific purposes are seen in a plurality of substantial technical effects of a specific implementation part.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rapid formation and capacity grading method for a cylindrical lithium battery is characterized in that formation and capacity grading are carried out on the lithium battery at the same time.
The further technical scheme of the invention is that the formation and the capacity grading processes are simultaneously carried out, and the detailed steps are as follows:
steps ① - ③ are formation processes;
① 0.1.1C, constant current charging, upper limit voltage 3.5V;
② 0.2.2C, constant current charging, upper limit voltage 3.9V;
③ 0.5.5C, constant current charging, upper limit voltage 4.2V;
④ 0.5.5C, constant current discharge, cut-off voltage 2.75V;
steps ⑤ - ⑥ are a capacity grading process, and a capacity C is obtained;
⑤ 0.5.5C constant current and constant voltage charging, the upper limit voltage is 4.2V, and the cut-off current is 0.05C;
⑥ 1C, constant current discharge, cut-off voltage 2.75V;
⑦ 0.5.5C, constant current charging, upper limit voltage of 3.65V and cutoff current of 0.05C;
aging the battery cell after the above steps to obtain a K value (K =)
) The detailed steps are as follows:
① aging for 1 day, and measuring voltage V1;
② aging for 7 days, measuring voltage V2 and internal resistance R;
setting good product ranges of V1 and V2, and picking out defects; and then is staged for storage through C, R, K.
Compared with the prior art, the invention adopting the technical scheme has the following beneficial effects: the method has the advantages that the same purpose is achieved, meanwhile, the process flow is simplified, and the production period is greatly shortened.
Detailed Description
The present invention will be further illustrated in conjunction with the following embodiments, which are to be understood as merely illustrative and not restrictive in scope.
The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features.
The invention provides a rapid formation and grading method of a cylindrical lithium battery, which is characterized by comprising the following steps: and carrying out formation and grading simultaneously, standing at normal temperature after formation, screening the cells with self discharge failure, and grading and warehousing. The whole production process has short period and simple operation, and is suitable for batch production.
The invention carries out the formation and the capacity grading simultaneously, and the detailed steps are as follows:
① 0.1.1C, constant current charging, upper limit voltage 3.5V;
② 0.2.2C, constant current charging, upper limit voltage 3.9V;
③ 0.5.5C, constant current charging, upper limit voltage 4.2V, (steps ① ~ ③ are the formation process)
④ 0.5.5C, constant current discharge, cut-off voltage 2.75V;
⑤ 0.5.5C constant current and constant voltage charging, the upper limit voltage is 4.2V, and the cut-off current is 0.05C;
⑥ 1C constant current discharge with cut-off voltage of 2.75V (step ⑤ ~ ⑥ is the capacity grading process to get capacity C)
⑦ 0.5.5C, constant current charging, upper limit voltage of 3.65V and cutoff current of 0.05C.
Electricity for completing the above stepsAging the core to obtain K value (K =)
) The detailed steps are as follows:
① aging for 1 day, measuring voltage V1,
② aging for 7 days, measuring voltage V2 and internal resistance R;
good product ranges of V1 and V2 were set, and defects were selected. And then is staged for storage through C, R, K.
The invention can simultaneously carry out the components and the content. The process is simplified, the production period is shortened, and the method is suitable for batch production.
Creatively, the above effects exist independently, and the combination of the above results can be completed by a set of structure.
It should be noted that the plurality of schemes provided in this patent include their own basic schemes, which are independent of each other and are not restricted to each other, but they may be combined with each other without conflict, so as to achieve a plurality of effects.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is to be limited to the embodiments described above.
Claims (2)
1. A rapid formation and capacity grading method for a cylindrical lithium battery is characterized in that formation and capacity grading are carried out on the lithium battery at the same time.
2. The rapid formation and capacity grading method for the cylindrical lithium battery as claimed in claim 1, wherein the formation and capacity grading processes are performed simultaneously, and the detailed steps are as follows:
steps ① - ③ are formation processes;
① 0.1.1C, constant current charging, upper limit voltage 3.5V;
② 0.2.2C, constant current charging, upper limit voltage 3.9V;
③ 0.5.5C, constant current charging, upper limit voltage 4.2V;
④ 0.5.5C, constant current discharge, cut-off voltage 2.75V;
steps ⑤ - ⑥ are a capacity grading process, and a capacity C is obtained;
⑤ 0.5.5C constant current and constant voltage charging, the upper limit voltage is 4.2V, and the cut-off current is 0.05C;
⑥ 1C, constant current discharge, cut-off voltage 2.75V;
⑦ 0.5.5C, constant current charging, upper limit voltage of 3.65V and cutoff current of 0.05C;
aging the battery cell after the above steps to obtain a K value (K =)
) The detailed steps are as follows:
① aging for 1 day, and measuring voltage V1;
② aging for 7 days, measuring voltage V2 and internal resistance R;
setting good product ranges of V1 and V2, and picking out defects; and then is staged for storage through C, R, K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633654.2A CN111384447A (en) | 2018-12-29 | 2018-12-29 | Rapid formation and grading method for cylindrical lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633654.2A CN111384447A (en) | 2018-12-29 | 2018-12-29 | Rapid formation and grading method for cylindrical lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111384447A true CN111384447A (en) | 2020-07-07 |
Family
ID=71220937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811633654.2A Pending CN111384447A (en) | 2018-12-29 | 2018-12-29 | Rapid formation and grading method for cylindrical lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111384447A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335691A (en) * | 2022-01-05 | 2022-04-12 | 合肥国轩高科动力能源有限公司 | Formation method of lithium ion battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332670A (en) * | 2014-10-27 | 2015-02-04 | 山东圣阳电源股份有限公司 | Method for formation charging of lithium iron phosphate battery |
| CN105449301A (en) * | 2015-12-30 | 2016-03-30 | 东风商用车有限公司 | Method for solving problem of flatulence failure of lithium titanate battery |
| CN105609889A (en) * | 2015-12-17 | 2016-05-25 | 中天储能科技有限公司 | Rapid formation and grading method for cylindrical lithium battery |
| CN106654427A (en) * | 2017-01-22 | 2017-05-10 | 珠海格力电器股份有限公司 | Formation method of lithium ion battery |
-
2018
- 2018-12-29 CN CN201811633654.2A patent/CN111384447A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332670A (en) * | 2014-10-27 | 2015-02-04 | 山东圣阳电源股份有限公司 | Method for formation charging of lithium iron phosphate battery |
| CN105609889A (en) * | 2015-12-17 | 2016-05-25 | 中天储能科技有限公司 | Rapid formation and grading method for cylindrical lithium battery |
| CN105449301A (en) * | 2015-12-30 | 2016-03-30 | 东风商用车有限公司 | Method for solving problem of flatulence failure of lithium titanate battery |
| CN106654427A (en) * | 2017-01-22 | 2017-05-10 | 珠海格力电器股份有限公司 | Formation method of lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335691A (en) * | 2022-01-05 | 2022-04-12 | 合肥国轩高科动力能源有限公司 | Formation method of lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107607874B (en) | The bikini screening technique of quick charge/discharge lithium ion battery | |
| CN110165319B (en) | Sorting method for self-discharge performance of high-capacity lithium battery | |
| CN108923080B (en) | Lithium ion battery matching method | |
| CN105703024B (en) | A kind of lithium-ion-power cell charging method | |
| CN102403536B (en) | Formation method for cylindrical lithium battery | |
| CN106384853B (en) | A kind of chemical conversion of lithium ion battery substep and conformity classification method | |
| CN103594742B (en) | A kind of sorting method for group matching of power lead-acid storage battery group | |
| CN104037461B (en) | Power train in vehicle application lithium ion battery grouping method | |
| CN104103857B (en) | Group matching method of lead-acid storage batteries | |
| CN103545567A (en) | Method used for rapid sorting of lithium ion batteries | |
| CN102760908A (en) | Quick formation method for lithium ion battery adapting to various cathode material systems | |
| CN109494412B (en) | LFP lithium ion battery cell capacity grading screening method | |
| CN107579298A (en) | Lithium ion battery grouping method | |
| CN110749832B (en) | Method for quickly estimating actual capacity of retired lithium ion battery of electric vehicle | |
| CN104638311B (en) | Water system lithium iron battery chemical synthesizing method | |
| CN102728564A (en) | Screening method of lithium cobaltate monomer batteries | |
| CN103956513B (en) | A kind of method for group matching of high-capacity lithium electrokinetic cell | |
| CN105514514B (en) | Lithium-ion-power cell optimizes charging method | |
| CN102231446A (en) | Method for controlling consistency of power battery pack | |
| CN110649324A (en) | Lithium battery formation and capacity grading process | |
| CN111697271A (en) | Lithium ion battery formation and capacity-dividing method | |
| CN103675708A (en) | Energy-efficient battery capacity sorting method | |
| CN108134146B (en) | Full-life charging method of tubular lead-acid storage battery | |
| CN105845991B (en) | Automobile plays deactivated lead carbon coiling accumulator | |
| CN114035071A (en) | SOC (system on chip) online correction method for water system secondary battery system |
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: 20200707 |