CN109786874A - A kind of partial volume method of lithium ion battery - Google Patents
A kind of partial volume method of lithium ion battery Download PDFInfo
- Publication number
- CN109786874A CN109786874A CN201811595844.XA CN201811595844A CN109786874A CN 109786874 A CN109786874 A CN 109786874A CN 201811595844 A CN201811595844 A CN 201811595844A CN 109786874 A CN109786874 A CN 109786874A
- Authority
- CN
- China
- Prior art keywords
- constant
- current
- discharge
- partial volume
- voltage
- 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.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention discloses a kind of partial volume method of lithium ion battery, method includes the following steps: step 1, the battery for treating partial volume carries out constant-current discharge, and the discharge current in constant-current discharge stage is 0.1C~0.6C；Step 2, battery after the constant-current discharge by step 1 carries out constant-current constant-voltage charging and constant-current discharge again, the charging current in the constant-current constant-voltage charging stage in step 2 is 0.3~0.6C, blanking voltage is 3.75V, cut-off current is 0.02C, and the discharge current of the constant-current discharge in step 2 is 0.3~0.6C；Step 3, constant-current charge and constant-current discharge are carried out again in the battery after constant-current constant-voltage charging and constant-current discharge in step 2, the charging current of constant-current charging phase is 0.3~0.6C, blanking voltage 3.55V in step 3, and the discharge current of constant-current discharge is 0.3~0.6C in step 3.
Description
Technical field
The present invention relates to a kind of partial volume methods of lithium ion battery.
Background technique
With the development of economy and society, demand of the people to the energy increasingly increases, and the storage of conventional fossil fuel is limited
Property and the environment harmfulness during producing and using all force people to find, exploitation, using new clean energy resource, as solar energy,
Wind energy etc..The utilization of new clean energy resource certainly will use the energy storage device of high capacity, and lithium ion battery is because of its excellent performance
And by extensive Business Studies, it is even more especially to promote lithium ion battery from the fast development of electric car industry after 2010
The development of industry.Lithium ion battery is generally classified according to positive electrode, and common positive electrode has cobalt acid lithium, LiMn2O4, nickel acid
Lithium, ternary material, LiFePO4 etc..Wherein ferric phosphate lithium cell by feat of excellent security performance, longer cycle life with
And higher technical maturity and industrialization advantage, in occupation of the higher market share.Generally, lithium battery is through formation process in carbon
It will form the SEI film (SEI film) for being covered on carbon electrolytic surface, the SEI on the phase interface of cathode and electrolyte
The quality of film directly affects the chemical property of battery.To stablize the SEI film, the partial volume stage usually requires to carry out multiple charge and discharge
Electricity circulation, and the standard packed using the discharge capacity of the process as pack, battery production enterprise requires research summary thus
Oneself suitable partial volume process flow and parameter out, to guarantee that battery obtains maximum capacity, best stability and longest
Service life.Partial volume stage multiple charge and discharge cycles can greatly increase the production cycle of battery, increase energy consumption, need meeting thus
It is time-consuming to shorten partial volume process on the basis of battery performance.
Summary of the invention
The present invention provides a kind of partial volume methods of lithium ion battery, it can be with the constant-current constant-voltage charging of second stage extremely
3.75V work step can increase in a relatively short period of time battery capacity and capacity is consistent by the process to the stabilization of SEI film
Property, promote battery performance.
The invention adopts the following technical scheme: a kind of partial volume method of lithium ion battery, method includes the following steps:
Step 1, the battery for treating partial volume carry out constant-current discharge, and the discharge current in constant-current discharge stage is 0.1C~0.6C；Step 2,
Battery after the constant-current discharge by step 1 carries out constant-current constant-voltage charging and constant-current discharge, the constant current constant voltage in step 2 again
The charging current of charging stage is 0.3~0.6C, blanking voltage 3.75V, cut-off current 0.02C, the constant current in step 2
The discharge current of electric discharge is 0.3~0.6C；Step 3, in the electricity after constant-current constant-voltage charging and constant-current discharge in step 2
Pond carries out constant-current charge and constant-current discharge again, and the charging current of constant-current charging phase is 0.3~0.6C, blanking voltage in step 3
For 3.55V, the discharge current of constant-current discharge is 0.3~0.6C in step 3.
Constant-current discharge is using constant-current discharge twice in step 1 of the present invention, twice the electric current of constant-current discharge be followed successively by 0.3~
0.5C and 0.1~0.2C.The constant-current constant-voltage charging electric current that is used in step 2 of the present invention and constant-current discharge electric current it is equal in magnitude.
The blanking voltage of constant-current discharge in step 1 of the present invention is 2.0~2.5V, shelves 1 before the work step of constant-current discharge in step 1
~5min.
The blanking voltage of constant-current discharge is 2.0~2.5V, the work step of constant-current discharge in step 2 in step 2 of the present invention
Before shelve 1~5min.The blanking voltage of constant-current discharge is 2.0~2.5V, the constant-current discharge in step 1 in step 3 of the present invention
Work step before shelve the time be 1~5min.Shelved before the work step of constant-current constant-voltage charging in step 2 of the present invention the time be 1~
5min.Shelving the time in step 3 of the present invention before the work step of constant-current charge is 1~5min.Described is positive material to partial volume battery
Material is LiFePO4, and negative electrode material is the rectangular aluminum hull power battery of artificial graphite.
The invention has the following advantages: after using above technical scheme, the constant current constant voltage in step 2 of the present invention
3.75V work step is charged to, by the process to the stabilization of SEI film, battery capacity and appearance can be increased in a relatively short period of time
Consistency is measured, battery performance is promoted.
Detailed description of the invention
Fig. 1 is the battery capacity under different partial volume work steps.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
The invention discloses providing a kind of partial volume method of lithium ion battery, method includes the following steps: step 1,
The battery for treating partial volume carries out constant-current discharge, and the discharge current in constant-current discharge stage is 0.1C~0.6C, and constant current is put in step 1
Electricity is using constant-current discharge twice, and the electric current of constant-current discharge is followed successively by 0.3~0.5C and 0.1~0.2C, the perseverance in step 1 twice
The blanking voltage for banishing electricity is 2.0~2.5V, shelves 1~5min before the work step of constant-current discharge in step 1；Step 2 is passing through
Battery after crossing the constant-current discharge of step 1 carries out constant-current constant-voltage charging and constant-current discharge, the constant-current constant-voltage charging in step 2 again
The charging current in stage is 0.3~0.6C, blanking voltage 3.75V, cut-off current 0.02C, the constant-current discharge in step 2
Discharge current be 0.3~0.6C, the constant-current constant-voltage charging electric current used in step 2 and constant-current discharge electric current it is equal in magnitude,
The blanking voltage of constant-current discharge is 2.0~2.5V in step 2, shelves 1~5min before the work step of constant-current discharge in step 2,
Shelving the time in step 2 before the work step of constant-current constant-voltage charging is 1~5min；Step 3, by the constant current constant voltage in step 2
Battery after charging and constant-current discharge carries out constant-current charge and constant-current discharge again, the charging current of constant-current charging phase in step 3
For 0.3~0.6C, blanking voltage 3.55V, the discharge current of constant-current discharge is 0.3~0.6C in step 3, permanent in step 3
The blanking voltage for banishing electricity is 2.0~2.5V, and shelving the time before the work step of constant-current discharge in step 3 is 1~5min, step
Shelved before the work step of constant-current charge in three the time be 1~5min, the present invention wait for partial volume battery be positive electrode be LiFePO4, bear
Pole material is the rectangular aluminum hull power battery of artificial graphite.
In Fig. 1, battery used in following embodiment and comparative examples is negative by positive electrode, artificial graphite of LiFePO4
The lithium ion battery of pole material carries out partial volume after completing chemical conversion, sealing according to lithium ion battery routine production process and process.Its
In battery used be the stable volume production battery of same batch.
Embodiment 1
To the battery after chemical conversion, sealing, partial volume, specific steps are carried out at room temperature are as follows:
(1) it carries out the first stage, 3min is first shelved to 2.5V with the current discharge of 1/3 C, then extremely with the current discharge of 0.2C
2.5V shelves 5min；
(2) progress second stage, the first electric current constant-current constant-voltage charging with 1/3 C, blanking voltage 3.75V, cut-off current 0.02C,
5min is shelved, then again with the current discharge of 1/3 C, blanking voltage 2.5V shelves 5min；
(3) carry out the phase III, first with the electric current constant-current charge of 1/3 C, blanking voltage 3.55V shelves 5min, then again with
The electric current constant-current discharge of 1/3 C, blanking voltage 2.5V shelve 3min using the work step capacity as partial volume capacity.
Comparative example 1
To the battery after chemical conversion, sealing, partial volume, specific steps are carried out at room temperature are as follows:
(1) constant-current discharge is carried out, first with the current discharge of 0.5 C, blanking voltage 2.5V shelves 3min, then with 0.2C, cut-off
Voltage is 2.5V, shelves 5min；
(2) carry out the phase III, first with the electric current constant-current charge of 0.5 C, blanking voltage 3.55V shelves 5min, then again with
The electric current constant-current discharge of 0.5 C, blanking voltage 2.5V shelve 3min using the work step capacity as partial volume capacity.
Comparative example 2
(1) it carries out the first stage, 3min is first shelved to 2.5V with the current discharge of 1/3 C, then extremely with the current discharge of 0.2C
2.5V shelves 5min；
(2) progress second stage, the first electric current constant-current constant-voltage charging with 1/3 C, blanking voltage 3.55V, cut-off current 0.02C,
5min is shelved, then again with the current discharge of 1/3 C, blanking voltage 2.5V shelves 5min；
(3) carry out the phase III, first with the electric current constant-current charge of 1/3 C, blanking voltage 3.55V shelves 5min, then again with
The electric current constant-current discharge of 1/3 C, blanking voltage 2.5V shelve 3min using the work step capacity as partial volume capacity.
Comparative example 3
(1) it carries out the first stage, 3min is first shelved to 2.5V with the current discharge of 1/3 C, then extremely with the current discharge of 0.2C
2.5V shelves 5min；
(2) progress second stage, the first electric current constant-current constant-voltage charging with 1/3 C, blanking voltage 3.65V, cut-off current 0.02C,
5min is shelved, then again with the current discharge of 1/3 C, blanking voltage 2.5V shelves 5min；
(3) carry out the phase III, first with the electric current constant-current charge of 1/3 C, blanking voltage 3.55V shelves 5min, then again with
The electric current constant-current discharge of 1/3 C, blanking voltage 2.5V shelve 3min using the work step capacity as partial volume capacity.
Using the volume production battery of same batch 110Ah, 9 batteries are chosen respectively according in embodiment 1 and comparative example 1,2,3
Work step carry out partial volume, as a result as shown in Figure 1, it is clear that, the battery capacity result through partial volume method in embodiment 1 is preferable.
Claims (9)
1. a kind of partial volume method of lithium ion battery, method includes the following steps:
Step 1, the battery for treating partial volume carry out constant-current discharge, and the discharge current in constant-current discharge stage is 0.1C~0.6C；
Step 2, the battery after the constant-current discharge by step 1 carry out constant-current constant-voltage charging and constant-current discharge, step 2 again
In the constant-current constant-voltage charging stage charging current be 0.3~0.6C, blanking voltage 3.75V, cut-off current 0.02C, step
The discharge current of constant-current discharge in rapid two is 0.3~0.6C；
Step 3 carries out constant-current charge and constant current in the battery after constant-current constant-voltage charging and constant-current discharge in step 2 again
Electric discharge, the charging current of constant-current charging phase is 0.3~0.6C in step 3, blanking voltage 3.55V, and constant current is put in step 3
The discharge current of electricity is 0.3~0.6C.
2. the partial volume method of lithium ion battery according to claim 1, it is characterized in that constant-current discharge uses two in step 1
Secondary constant-current discharge, the electric current of constant-current discharge is followed successively by 0.3~0.5C and 0.1~0.2C twice.
3. the partial volume method of lithium ion battery according to claim 1, it is characterized in that the constant current constant voltage used in step 2
Charging current and constant-current discharge electric current it is equal in magnitude.
4. the partial volume method of lithium ion battery according to claim 1, it is characterized in that section of the constant-current discharge in step 1
Only voltage is 2.0~2.5V, shelves 1~5min before the work step of constant-current discharge in step 1.
5. the partial volume method of lithium ion battery according to claim 1, it is characterized in that in step 2 constant-current discharge cut-off
Voltage is 2.0~2.5V, shelves 1~5min before the work step of constant-current discharge in step 2.
6. the partial volume method of lithium ion battery according to claim 1, it is characterized in that in step 3 constant-current discharge cut-off
Voltage is 2.0~2.5V, shelves the time before the work step of constant-current discharge in step 1 as 1~5min.
7. the partial volume method of lithium ion battery according to claim 1, it is characterized in that constant-current constant-voltage charging in step 2
It is 1~5min that the time is shelved before work step.
8. the partial volume method of lithium ion battery according to claim 1, it is characterized in that in step 3 constant-current charge work step
Before shelve the time be 1~5min.
It to partial volume battery is anode it is characterized in that described 9. the partial volume method of lithium ion battery according to claim 1
Material is LiFePO4, and negative electrode material is the rectangular aluminum hull power battery of artificial graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811595844.XA CN109786874B (en) | 2018-12-26 | 2018-12-26 | Capacity grading method of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811595844.XA CN109786874B (en) | 2018-12-26 | 2018-12-26 | Capacity grading method of lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109786874A true CN109786874A (en) | 2019-05-21 |
| CN109786874B CN109786874B (en) | 2022-06-07 |
Family
ID=66498157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811595844.XA Active CN109786874B (en) | 2018-12-26 | 2018-12-26 | Capacity grading method of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109786874B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911757A (en) * | 2019-10-25 | 2020-03-24 | 合肥国轩高科动力能源有限公司 | Safe capacity grading method for ternary lithium battery |
| CN112467240A (en) * | 2020-12-21 | 2021-03-09 | 潍坊聚能电池有限公司 | High-temperature capacity grading and matching process of lithium ion battery |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2278644A2 (en) * | 2000-08-18 | 2011-01-26 | Sony Corporation | Non-Aquerous electrolyte secondary cell |
| CN102394315A (en) * | 2011-11-18 | 2012-03-28 | 武汉银泰科技燃料电池有限公司 | Cell characteristic vector based lithium ion cell configuration method |
| CN103456918A (en) * | 2012-05-28 | 2013-12-18 | 比亚迪股份有限公司 | Battery anode, preparation method thereof and lithium ion battery using the same |
| CN103515653A (en) * | 2012-06-28 | 2014-01-15 | 深圳市海盈科技有限公司 | Formation method of soft-packed lithium ion battery |
| CN103894350A (en) * | 2014-03-26 | 2014-07-02 | 山东精工电子科技有限公司 | Capacitance-grading screening and grouping method for cylindrical lithium battery |
| CN104062594A (en) * | 2014-03-27 | 2014-09-24 | 浙江超威创元实业有限公司 | Lithium-ion power battery matching method |
| CN105428642A (en) * | 2015-12-15 | 2016-03-23 | 新余英泰能科技有限公司 | Method for producing energy storage lithium ion battery by using lithium-rich manganese cathode material |
| CN107359375A (en) * | 2017-06-20 | 2017-11-17 | 中航锂电（洛阳）有限公司 | A kind of partial volume method of lithium ion battery |
| CN108246658A (en) * | 2017-12-12 | 2018-07-06 | 合肥国轩高科动力能源有限公司 | Method for screening consistency of lithium iron phosphate batteries |
| CN108539277A (en) * | 2018-03-26 | 2018-09-14 | 南京国轩电池有限公司 | A kind of partial volume method of power-type lithium ion battery |
-
2018
- 2018-12-26 CN CN201811595844.XA patent/CN109786874B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2278644A2 (en) * | 2000-08-18 | 2011-01-26 | Sony Corporation | Non-Aquerous electrolyte secondary cell |
| CN102394315A (en) * | 2011-11-18 | 2012-03-28 | 武汉银泰科技燃料电池有限公司 | Cell characteristic vector based lithium ion cell configuration method |
| CN103456918A (en) * | 2012-05-28 | 2013-12-18 | 比亚迪股份有限公司 | Battery anode, preparation method thereof and lithium ion battery using the same |
| CN103515653A (en) * | 2012-06-28 | 2014-01-15 | 深圳市海盈科技有限公司 | Formation method of soft-packed lithium ion battery |
| CN103894350A (en) * | 2014-03-26 | 2014-07-02 | 山东精工电子科技有限公司 | Capacitance-grading screening and grouping method for cylindrical lithium battery |
| CN104062594A (en) * | 2014-03-27 | 2014-09-24 | 浙江超威创元实业有限公司 | Lithium-ion power battery matching method |
| CN105428642A (en) * | 2015-12-15 | 2016-03-23 | 新余英泰能科技有限公司 | Method for producing energy storage lithium ion battery by using lithium-rich manganese cathode material |
| CN107359375A (en) * | 2017-06-20 | 2017-11-17 | 中航锂电（洛阳）有限公司 | A kind of partial volume method of lithium ion battery |
| CN108246658A (en) * | 2017-12-12 | 2018-07-06 | 合肥国轩高科动力能源有限公司 | Method for screening consistency of lithium iron phosphate batteries |
| CN108539277A (en) * | 2018-03-26 | 2018-09-14 | 南京国轩电池有限公司 | A kind of partial volume method of power-type lithium ion battery |
Non-Patent Citations (1)
| Title |
|---|
| 罗雨: "动力锂离子电池制备工艺对一致性影响研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911757A (en) * | 2019-10-25 | 2020-03-24 | 合肥国轩高科动力能源有限公司 | Safe capacity grading method for ternary lithium battery |
| CN112467240A (en) * | 2020-12-21 | 2021-03-09 | 潍坊聚能电池有限公司 | High-temperature capacity grading and matching process of lithium ion battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109786874B (en) | 2022-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106384853B (en) | A kind of chemical conversion of lithium ion battery substep and conformity classification method | |
| CN102760908B (en) | Quick formation method for lithium ion battery adapting to various cathode material systems | |
| CN102185166B (en) | Battery forming and repairing method | |
| CN105355457A (en) | Lithium ion capacitor and formation method thereof | |
| CN103904293B (en) | A kind of molybdenum trioxide in-stiu coating nitrogen doped carbon nanotube combination electrode material and its preparation method and application | |
| CN104577202A (en) | Formation method and preparation method of high-voltage lithium ion battery as well as battery | |
| CN108232311A (en) | A kind of chemical synthesizing method of lithium rechargeable battery | |
| CN108539277A (en) | A kind of partial volume method of power-type lithium ion battery | |
| CN109659640A (en) | A kind of quick chemical synthesis technology of lithium ion battery | |
| CN108155379A (en) | Lithium ion battery suitable for low temperature environment and preparation method thereof | |
| CN105742695B (en) | A kind of lithium ion battery and preparation method thereof | |
| CN110034336B (en) | Battery formation method for forming stable SEI film | |
| CN104810557A (en) | Preparation method of lithium ion battery | |
| CN109301178A (en) | A kind of sodium Dual-ion cell of the novel carbon negative pole material preparation of doping phosphorus | |
| CN110265652A (en) | A kind of preparation method for lithium ion/sodium-ion battery cathode nano-sheet Sb/C composite material | |
| CN113745647A (en) | Non-negative electrode rechargeable sodium ion secondary battery and manufacturing method thereof | |
| CN107946564A (en) | Rich sodium manganese base Na4Mn2O5/Na0.7MnO2Composite material and its preparation method and application | |
| CN108134079A (en) | The application of ferric phosphate and phosphoric acid iron composite material as cathode in Dual-ion cell | |
| CN111293365A (en) | Preparation method of lithium manganate battery | |
| CN108400396A (en) | A method of improving the first charge-discharge specific capacity of lithium ion battery and first effect | |
| CN109786874A (en) | A kind of partial volume method of lithium ion battery | |
| CN110061202A (en) | Preparation method of ternary battery positive pole piece and ternary battery | |
| CN107785559B (en) | Graphene-lithium titanate composite material, preparation method thereof, lithium-supplementing graphene-lithium titanate film and lithium battery | |
| CN112820964A (en) | Aging and capacity grading method for lithium ion battery | |
| CN107720822A (en) | A kind of preparation method of sea urchin shape anode material for lithium-ion batteries |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |