CN107482270A - A kind of high-nickel material system lithium-ion electric core activation method - Google Patents
A kind of high-nickel material system lithium-ion electric core activation method Download PDFInfo
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- CN107482270A CN107482270A CN201710765831.1A CN201710765831A CN107482270A CN 107482270 A CN107482270 A CN 107482270A CN 201710765831 A CN201710765831 A CN 201710765831A CN 107482270 A CN107482270 A CN 107482270A
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- battery core
- activation
- nickel material
- temperature
- activation method
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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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- 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
Abstract
The invention belongs to technical field of lithium ion, more particularly to a kind of high-nickel material system lithium-ion electric core activation method, comprise the following steps：1) activation pressure is 0.2~0.7Mpa, and activation temperature is 30 DEG C~45 DEG C；2) battery core is shelved into 20~30min, first with 0.02~0.05C, 200~300min of charging, blanking voltage is 3.3~3.5V, then with 0.1~0.2C, 400~480min of charging, blanking voltage is 3.75~3.80V；3) battery core is shelved into 5~15min, completes activation process.The present invention by Optimizing Process Parameters, make pole piece with it is good every inter-film contact, effectively improve the transmission speed of lithium ion, reduce polarization, high-nickel material is reduced with electrolyte side reaction simultaneously, and then improve battery core efficiency and gram volume first, protect liquid coefficient and also increased；It is easy to operate and activation method is simple, it can apply to mass produce.
Description
Technical field
The invention belongs to technical field of lithium ion, more particularly to a kind of high-nickel material system lithium-ion electric core activation side
Method.
Background technology
As Environmental protection requires more and more higher, traditional fuel vehicle has obviously been unable to large-scale use, because
This new-energy automobile welcomes the chance of fast development.But country proposes to the energy density of new energy resource power battery in recent years
New requirement, propose to reach 260Wh/Kg than energy to the year two thousand twenty electrokinetic cell system, compare energy to electrokinetic cell monomer in 2025
Amount reaches 500Wh/Kg target.Therefore, battery of the exploitation with higher quality energy density or volume energy density turns into lithium
The focus of ion battery development.
To reach requirement of the country to battery energy density at present, only develop the battery core of high-nickel material system, including
NCM622, NCM811, NCA etc..But the battery core of high-nickel material typically uses conventional chemical synthesis technology, and analysis more or less occurs in interface
Lithium phenomenon, efficiency comparison is low first.
In order to solve the above problems, there is the method being melted into using high-temperature clamp in the prior art, such as patent publication No. is
106450471A Chinese patent, it uses 70 DEG C of high temperature, and 0.3~0.4Mpa of pressure is melted into.But temperature it is too high so that
Side reaction between high-nickel material and electrolyte becomes big, transition metal dissolution and then causes SEI membrane stabilities poor, and battery core protects liquid rate
Low, efficiency is low first.
The content of the invention
It is an object of the invention to：For deficiency existing for current nickelic system battery core activation method, and provide a kind of high
Nickel material system lithium-ion electric core activation method, by Optimizing Process Parameters, solution high-nickel material interface is poor, first efficiency
Low, gram volume is low, protects the problem of liquid rate is low.
To achieve these goals, the present invention uses following technical scheme：
A kind of high-nickel material system lithium-ion electric core activation method, comprises the following steps：
Step 1: battery core is placed in into fixture formation cabinet, and battery core being clamped using clamping plate, clamping pressure is 0.2~0.7Mpa,
Heated at constant temperature is then carried out to battery core, heating-up temperature is 30 DEG C~45 DEG C；
Step 2: the battery core constant temperature in step 1 is shelved into 20~30min, then first filled with 0.02~0.05C electric current
200~300min of electricity, blanking voltage are 3.3~3.5V, then electric current 400~480min of charging with 0.1~0.2C, blanking voltage
For 3.75~3.80V；
Step 3: the battery core of step 2 is shelved into 5~15min, activation process is completed.
Wherein, conventional chemical synthesizing method due to chemical conversion temperature it is relatively low, pole piece loose contact, interface is poor after causing activation, first
Secondary efficiency and gram volume are low；And high temperature (such as 70 DEG C) fixture is melted into, nickelic system side reaction is big, and transition metal dissolution destroys
SEI films, equally efficiency and gram volume are low first.And the present invention is by Optimizing Process Parameters, make battery core activation face pressure be 0.2~
0.7Mpa, activation temperature are 30~45 DEG C, make under the activation condition contact between pole piece and barrier film it is good, be advantageous to raising lithium from
The transmission speed of son, reduce polarization, while reduce high-nickel material and electrolyte side reaction, so improve battery core first efficiency and
Gram volume, and protect liquid coefficient and also increased.
As the preferred scheme of the present invention, the clamping pressure applied in step 1 is 0.3~0.6Mpa.
As the preferred scheme of the present invention, the clamping pressure applied in step 1 is 0.5Mpa.
As the preferred scheme of the present invention, the heating-up temperature in step 1 is 35 DEG C~40 DEG C.
As the preferred scheme of the present invention, the heating-up temperature in step 1 is 38 DEG C.
As the preferred scheme of the present invention, the expression formula of the high-nickel material is Li1+zNixMnyA1-x-yO2, wherein, 0.5≤
X≤0.9,0.1≤y≤0.5,0.9≤x+y≤1,0 ＜ z≤0.1；The A is in Co, Mg, Zr, Ti, Si, Sc, La and Al
At least one element.
Compared to prior art, for the present invention by Optimizing Process Parameters, it is 0.2~0.7Mpa to make battery core activation face pressure, living
It is 30~45 DEG C to change temperature, makes to contact the transmission for well, being advantageous to improve lithium ion between pole piece and barrier film under the activation condition
Speed, polarization is reduced, while reduce the side reaction between high-nickel material and electrolyte, and then improve efficiency first and gram appearance
Amount, protect liquid coefficient and also increased.Therefore, activation method of the invention can improve interface existing for high-nickel material activation process
Difference, efficiency and the problem of low gram volume, and activation method is simple first is easy to operate, can apply to mass produce.
Embodiment
To make technical scheme and advantage clearer, below in conjunction with specific embodiment, to the skill of the present invention
Art scheme is clearly and completely described, it is clear that and described embodiment is part of the embodiment of the present invention, rather than all
Embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment obtained, belongs to the scope of protection of the invention.
Embodiment 1
The present embodiment provides a kind of NCM622 (coefficient represents component ratio) material system lithium-ion electric core activation method, its
Comprise the following steps：
Step 1: battery core is placed in into fixture formation cabinet, and battery core is clamped using clamping plate, clamping pressure 0.2Mpa, then
Heated at constant temperature is carried out to battery core, heating-up temperature is 30 DEG C；
Step 2: the battery core constant temperature in step 1 is shelved into 20min, then first cut with 0.02C electric current charging 200min
Only voltage is 3.3V, then electric current charging 400min, blanking voltage 3.75V with 0.1C；
Step 3: the battery core of step 2 is shelved into 5min, activation process is completed.
Embodiment 2
The present embodiment provides a kind of NCA material systems lithium-ion electric core activation method, and it comprises the following steps：
Step 1: battery core is placed in into fixture formation cabinet, and battery core is clamped using clamping plate, clamping pressure 0.7Mpa, then
Heated at constant temperature is carried out to battery core, heating-up temperature is 45 DEG C；
Step 2: the battery core constant temperature in step 1 is shelved into 30min, then first cut with 0.05C electric current charging 300min
Only voltage is 3.5V, then electric current charging 480min, blanking voltage 3.80V with 0.2C；
Step 3: the battery core of step 2 is shelved into 15min, activation process is completed.
Embodiment 3
The present embodiment provides a kind of NCM811 material systems lithium-ion electric core activation method, and it comprises the following steps：
Step 1: battery core is placed in into fixture formation cabinet, and battery core is clamped using clamping plate, clamping pressure 0.5Mpa, then
Heated at constant temperature is carried out to battery core, heating-up temperature is 38 DEG C；
Step 2: the battery core constant temperature in step 1 is shelved into 25min, then first cut with 0.03C electric current charging 250min
Only voltage is 3.4V, then electric current charging 440min, blanking voltage 3.80V with 0.15C；
Step 3: the battery core of step 2 is shelved into 10min, activation process is completed.
Embodiment 4
As different from Example 1, the heating-up temperature of the present embodiment is 35 DEG C, and remaining is no longer superfluous here with embodiment 1
State.
Embodiment 5
As different from Example 1, the heating-up temperature of the present embodiment is 40 DEG C, and remaining is no longer superfluous here with embodiment 1
State.
Embodiment 6
As different from Example 1, the heating-up temperature of the present embodiment is 45 DEG C, and remaining is no longer superfluous here with embodiment 1
State.
Embodiment 7
As different from Example 2, the clamping pressure of the present embodiment is 0.6Mpa, and remaining is no longer superfluous here with embodiment 2
State.
Embodiment 8
As different from Example 2, the clamping pressure of the present embodiment is 0.4Mpa, and remaining is no longer superfluous here with embodiment 2
State.
Embodiment 9
As different from Example 2, the clamping pressure of the present embodiment is 0.2Mpa, and remaining is no longer superfluous here with embodiment 2
State.
Embodiment 10
As different from Example 3, the clamping pressure of the present embodiment is 0.4Mpa, and heating-up temperature is 35 DEG C, and remaining is the same as real
Example 3 is applied, is repeated no more here.
Embodiment 11
As different from Example 3, the clamping pressure of the present embodiment is 0.2Mpa, and heating-up temperature is 45 DEG C, and remaining is the same as real
Example 3 is applied, is repeated no more here.
Embodiment 12
As different from Example 3, the clamping pressure of the present embodiment is 0.7Mpa, and heating-up temperature is 30 DEG C, and remaining is the same as real
Example 3 is applied, is repeated no more here.
Comparative example 1
As different from Example 1, pressure is not applied to battery core in this comparative example activation process, and activation temperature is room
Temperature, remaining is repeated no more here with embodiment 1.
Comparative example 2
As different from Example 1, the activation temperature in this comparative example activation process is 70 DEG C, remaining with embodiment 1, this
In repeat no more.
Comparative example 3
As different from Example 3, the clamping pressure of this comparative example is 0.05Mpa, and heating-up temperature is 60 DEG C, and remaining is the same as real
Example 3 is applied, is repeated no more here.
Comparative example 4
As different from Example 3, the clamping pressure of this comparative example is 1.0Mpa, and heating-up temperature is 25 DEG C, and remaining is the same as real
Example 3 is applied, is repeated no more here.
The battery core completed is activated to embodiment 1~12 and comparative example 1~4 respectively and carries out electrochemical property test, test knot
Fruit is shown in Table 1.
The electrochemical property test result of the battery core of the embodiment of table 1 and comparative example
Following information can at least be obtained by the test result of table 1：
Comparative example 1 and comparative example 1~2 are understood, compared to use Conventional activation methods or use high-temperature clamp method,
There is higher efficiency first using the battery core of activation method of the present invention, higher gram volume, more preferably liquid-keeping property and more
Excellent cycle performance.Because the present invention is by optimizing activating process parameter so that battery core activation process median surface is preferable,
The side reaction under high-nickel material hot conditions between electrolyte is also reduced simultaneously, avoids transition metal ions dissolution from being formed poor
The SEI films of quality, so that the reversible capacity increase of battery core, and battery core efficiency and gram volume first are effectively improved, also make electricity
Pond keeps excellent cycle performance.
Comparative example 1 and embodiment 3~6 understand that curve is presented in lifting of the activation temperature to the chemical property of battery core
Relation, that is to say, that activation temperature is too high or too low, can all influence the best electrochemical performance of battery core.
Comparative example 2 and embodiment 7~9 understand that curve is presented in lifting of the activation pressure to the chemical property of battery core
Relation, that is to say, that activation pressure is too high or too low, can all influence the best electrochemical performance of battery core.
Knowable to comparative example 3, embodiment 10~12 and comparative example 3~4, activation pressure and activation temperature in activation process
Control it is of crucial importance, when activation temperature is too high or too low, or when activation pressure is too high or too low, chemical property is all
It can substantially reduce；Therefore, only activation pressure and activation temperature are controlled in suitable scope simultaneously, just contributes to lifting electricity
The chemical property of core.
The announcement and teaching of book according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and changed.Therefore, the invention is not limited in above-mentioned embodiment, every those skilled in the art exist
Made any conspicuously improved, replacement or modification belong to protection scope of the present invention on the basis of the present invention.This
Outside, although having used some specific terms in this specification, these terms merely for convenience of description, not to the present invention
Form any restrictions.
Claims (6)
1. a kind of high-nickel material system lithium-ion electric core activation method, it is characterised in that comprise the following steps：
Step 1: battery core is placed in into fixture formation cabinet, and battery core is clamped using clamping plate, clamping pressure is 0.2~0.7Mpa, then
Heated at constant temperature is carried out to battery core, heating-up temperature is 30 DEG C~45 DEG C；
Step 2: the battery core constant temperature in step 1 is shelved into 20~30min, then first with 0.02~0.05C electric current charging 200
~300min, blanking voltage are 3.3~3.5V, then electric current 400~480min of charging with 0.1~0.2C, blanking voltage are
3.75~3.80V；
Step 3: the battery core of step 2 is shelved into 5~15min, activation process is completed.
2. high-nickel material system lithium-ion electric core activation method according to claim 1, it is characterised in that：Applied in step 1
The clamping pressure added is 0.3~0.6Mpa.
3. high-nickel material system lithium-ion electric core activation method according to claim 2, it is characterised in that：Applied in step 1
The clamping pressure added is 0.5Mpa.
4. high-nickel material system lithium-ion electric core activation method according to claim 1, it is characterised in that：In step 1
Heating-up temperature is 35 DEG C~40 DEG C.
5. high-nickel material system lithium-ion electric core activation method according to claim 4, it is characterised in that：In step 1
Heating-up temperature is 38 DEG C.
6. high-nickel material system lithium-ion electric core activation method according to claim 1, it is characterised in that：The nickelic material
The expression formula of material is Li1+zNixMnyA1-x-yO2, wherein, 0.5≤x≤0.9,0.1≤y≤0.5,0.9≤x+y≤1,0 ＜ z≤
0.1；The A is at least one of Co, Mg, Zr, Ti, Si, Sc, La and Al element.
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Cited By (3)
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| CN108539305A (en) * | 2018-05-03 | 2018-09-14 | 河南电池研究院有限公司 | A kind of nickelic lithium ion battery chemical synthesis technology of Soft Roll |
| CN111261931A (en) * | 2018-12-01 | 2020-06-09 | 深圳格林德能源集团有限公司 | Method for rapidly determining electrolyte amount of high-compaction nickel cobalt manganese oxide lithium battery |
| CN111653730A (en) * | 2020-06-12 | 2020-09-11 | 华鼎国联四川动力电池有限公司 | Method for double heat treatment and rapid formation of battery cell coated with artificial SEI film negative pole piece |
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Application publication date: 20171215 |