CN108336434B - Lithium ion battery treatment method and lithium ion battery prepared by same - Google Patents
Lithium ion battery treatment method and lithium ion battery prepared by same Download PDFInfo
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- CN108336434B CN108336434B CN201810170787.4A CN201810170787A CN108336434B CN 108336434 B CN108336434 B CN 108336434B CN 201810170787 A CN201810170787 A CN 201810170787A CN 108336434 B CN108336434 B CN 108336434B
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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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Abstract
The invention provides a lithium ion battery treatment method and a lithium ion battery prepared by the same, and relates to the technical field of energy storage batteries. The lithium ion battery treatment method mainly comprises the step of carrying out charge capacity grading on the formed lithium ion battery by using low-current and high-current alternative charging and discharging treatment, has the advantages of short production period, high equipment utilization rate and low energy consumption, and can obviously increase the storage capacity of the battery and prolong the service life of the battery. The treatment method can be widely used for the charged capacity grading treatment of the lithium ion battery.
Description
Technical Field
The invention relates to the technical field of energy storage batteries, in particular to a lithium ion battery processing method and a lithium ion battery prepared by the same.
Background
The production process of the lithium ion battery comprises the working procedures of slurry mixing, coating, rolling, slicing, laminating (winding), assembling, liquid injection, formation and the like, wherein the charge capacity grading is an important link for determining the performance of the lithium ion battery.
The influence of the charged partial-capacity process on the lithium battery is mainly as follows: 1, the maintenance, stability and durability of an SEI film of the negative plate are influenced, and the cycle performance of the lithium battery is further influenced; 2, the capacity of the lithium battery is influenced; 3, incorrect charging capacity grading process can directly cause lithium precipitation of the negative electrode of the lithium battery to form lithium dendrite, so that the safety performance of the lithium battery is seriously threatened, and internal short circuit and even explosion of the lithium battery can be caused. Therefore, the charge-capacitance separation process plays a crucial role in the performance of the lithium battery.
The traditional charge capacity grading process generally comprises the following steps: after the post-treatment of the battery is finished, standing at a constant temperature for 3-5 days, and then repeatedly charging and activating the battery with the current of 1C. The traditional charging process generally consumes a long time, but the capacity exertion is not thorough, and if the capacity exertion is not complete, the charging can be carried out for many times, so that the problems of large equipment investment, long production period, low equipment use efficiency, large power consumption and the like are caused, and the production efficiency of the lithium battery is seriously influenced.
Therefore, it is necessary and urgent to develop a lithium ion battery charging processing method that has the advantages of short production cycle, high equipment utilization rate, and low energy consumption, and can also significantly increase the storage capacity of the battery and prolong the service life of the battery.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a lithium ion battery treatment method, which has the advantages of short production period, high equipment utilization rate and low energy consumption, and can obviously increase the storage capacity of the battery and prolong the service life of the battery.
The second purpose of the invention is to provide a lithium ion battery which is prepared by the processing method and has the advantages of large storage capacity and long service life of the battery.
The invention provides a lithium ion battery treatment method, which is mainly used for carrying out charge capacity grading on a lithium ion battery subjected to formation treatment by using low-current and high-current alternative charge and discharge treatment.
Further, the small current is 0.15-0.25C; the large current is 1.8-2.5C.
Further, the sequence of the charging and the capacity grading of the low-current and high-current alternative charging and discharging treatment is as follows:
(a) firstly, charging the battery for 350-450 min by using a small current, then charging for 70-90 min by using a constant voltage, and standing for 3-5 min;
(b) discharging the battery for 100-150 min by using high-current direct current, and standing for 3-5 min;
(c) charging the battery for 100-150 min at a high current and a constant current, then charging for 70-90 min at a constant voltage, and standing for 3-5 min;
(d) and discharging the battery with low-current direct current for 350-450 min, and standing for 3-5 min to finish the low-current and high-current alternative charge-discharge charge capacity grading treatment.
Further, the current in the step (a) of charging with low current and the step (c) of charging with high current is constant current.
Further, the voltage of the constant voltage charging in the step (a) and the step (c) is 3.65V.
Further, the upper limit voltage of the step (a) is 3.65V, and the lower limit voltage of the step (c) is 2.0V during the low-current charging and the high-current charging.
Further, the off current during the constant voltage charging in the step (a) and the step (C) is 0.01C.
Furthermore, the specific sequence of the charging and the capacity grading of the alternating charging and discharging treatment of the small current and the large current is as follows:
(a) firstly, charging the battery for 350-450 min at a constant current of 0.15-0.25 ℃ and with an upper limit voltage of 3.65V, then charging for 70-90 min at a constant voltage of 3.65V and with a cutoff current of 0.01C, and standing for 3-5 min;
(b) discharging the battery for 100-150 min by direct current at 1.8-2.5 ℃, and standing for 3-5 min at the lower limit voltage of 2.0V;
(c) charging the battery for 100-150 min at a constant current of 1.8-2.5C, charging the battery at an upper limit voltage of 3.65V, then charging the battery at a constant voltage of 3.65V for 70-90 min, stopping current for 0.01C, and standing for 3-5 min;
(d) and discharging the battery for 350-450 min by using direct current of 0.15-0.25C, keeping the lower limit voltage at 2.0V for 3-5 min, and finishing the charge capacity grading treatment of alternately charging and discharging small current and large current.
Furthermore, before the charged capacity grading treatment, the method also comprises the steps of measuring the voltage and the internal resistance of the battery and sorting the capacity, and batteries with abnormal voltage or internal resistance and unqualified capacity are not matched.
The invention provides a lithium ion battery, which is prepared by the lithium ion battery treatment method.
Compared with the prior art, the invention has the beneficial effects that:
the treatment method of the lithium ion battery provided by the invention is mainly used for carrying out charge capacity grading on the lithium ion battery subjected to formation treatment by using low-current and high-current alternative charging and discharging treatment, has the advantages of short production period, high equipment utilization rate and low energy consumption, and can also obviously increase the storage capacity of the battery and prolong the service life of the battery.
The lithium ion battery provided by the invention is prepared by the treatment method, and has the advantages of large electricity storage capacity and long service life of the battery.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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.
According to one aspect of the invention, the lithium ion battery treatment method mainly comprises the step of carrying out charge capacity grading on the lithium ion battery subjected to formation treatment by using low-current and high-current alternative charge and discharge treatment.
The treatment method of the lithium ion battery provided by the invention is mainly used for carrying out charge capacity grading on the lithium ion battery subjected to formation treatment by using low-current and high-current alternative charging and discharging treatment, has the advantages of short production period, high equipment utilization rate and low energy consumption, and can also obviously increase the storage capacity of the battery and prolong the service life of the battery.
In a preferred embodiment of the present invention, the small current is 0.15 to 0.25C; the large current is 1.8-2.5C.
In the present invention, the above-mentioned small currents are typically, but not limited to, contained in the following amounts: 0.15C, 0.18C, 0.2C, 0.15C, 0.22C, or 0.25C.
In the present invention, typical but non-limiting contents of the above-mentioned high current are: 1.8C, 1.9C, 2.0C, 2.2C, 2.4C, or 2.5C.
In a preferred embodiment of the present invention, the low current and high current alternating charge and discharge processes are performed in the following order:
(a) firstly, charging the battery for 350-450 min by using a small current, then charging for 70-90 min by using a constant voltage, and standing for 3-5 min;
(b) discharging the battery for 100-150 min by using high-current direct current, and standing for 3-5 min;
(c) charging the battery for 100-150 min at a high current and a constant current, then charging for 70-90 min at a constant voltage, and standing for 3-5 min;
(d) and discharging the battery with low-current direct current for 350-450 min, and standing for 3-5 min to finish the low-current and high-current alternative charge-discharge charge capacity grading treatment.
In a preferred embodiment, the current in the step (a) of charging with a small current and the step (c) of charging with a large current is a constant current.
In a preferred embodiment, the voltage for the constant voltage charging in the steps (a) and (c) is 3.65V.
In a preferred embodiment of the present invention, the upper limit voltage of the step (a) is 3.65V and the lower limit voltage of the step (c) is 2.0V during the low current charging and the high current charging.
In a preferred embodiment of the present invention, the off-current during the constant voltage charging of the step (a) and the step (C) is 0.01C.
In the above preferred embodiment, the specific sequence of the low-current and high-current alternate charging and discharging processes for performing the charging and capacitance grading is as follows:
(a) firstly, charging the battery for 350-450 min at a constant current of 0.15-0.25 ℃ and with an upper limit voltage of 3.65V, then charging for 70-90 min at a constant voltage of 3.65V and with a cutoff current of 0.01C, and standing for 3-5 min;
(b) discharging the battery for 100-150 min by direct current at 1.8-2.5 ℃, and standing for 3-5 min at the lower limit voltage of 2.0V;
(c) charging the battery for 100-150 min at a constant current of 1.8-2.5C, charging the battery at an upper limit voltage of 3.65V, then charging the battery at a constant voltage of 3.65V for 70-90 min, stopping current for 0.01C, and standing for 3-5 min;
(d) and discharging the battery for 350-450 min by using direct current of 0.15-0.25C, keeping the lower limit voltage at 2.0V for 3-5 min, and finishing charge-discharge charge treatment of alternating low current and high current.
In a preferred embodiment of the invention, before the charging capacity grading treatment, the method further comprises the steps of measuring the voltage and the internal resistance of the battery and sorting the capacity, and batteries with abnormal voltage or internal resistance and unqualified capacity are not matched.
According to one aspect of the invention, a lithium ion battery is prepared by the above lithium ion battery treatment method.
The lithium ion battery provided by the invention is prepared by the treatment method, and has the advantages of large electricity storage capacity and long service life of the battery.
Preferably, the treatment method of the lithium ion battery comprises the following steps:
(1) after the battery is assembled, vacuumizing, injecting electrolyte for multiple times, and sealing;
(2) the battery is placed for 8-12 hours under the constant temperature condition, and the battery is turned or rotated in the placing process, so that each surface of the battery is placed downwards for a certain time;
(3) performing formation treatment on the placed battery, and forming the lithium ion battery;
(4) after the formation is finished, the battery is deflated and vacuumized once again, and then the battery is sealed and post-treated to obtain the lithium ion battery;
(5) and carrying out low-current and high-current alternative charging and discharging treatment on the post-treated battery, and carrying out charge capacity grading on the lithium ion battery to obtain the lithium ion battery.
The technical solution of the present invention will be further described with reference to examples and comparative examples.
Example 1
A lithium ion battery treatment method comprises the following specific steps:
(a) firstly, charging the battery at a constant current of 0.15C for 350min, wherein the upper limit voltage is 3.65V, then charging at a constant voltage of 3.65V for 70min, stopping the current at 0.01C, and standing for 3 min;
(b) discharging the battery for 100min by using direct current of 1.8C, and standing for 3min by using lower limit voltage of 2.0V;
(c) charging the battery at 1.8C for 100min at constant current with upper limit voltage of 3.65V, charging at 3.65V at constant voltage for 70min, stopping current at 0.01C, standing for 3min
(d) And discharging the battery for 350min by using the 0.15C direct current, keeping the lower limit voltage at 2.0V for 3min, and finishing the low-current and high-current alternative charge-discharge charge capacity grading treatment.
Example 2
A lithium ion battery treatment method comprises the following specific steps:
(a) firstly, charging the battery at a constant current of 0.25 ℃ for 350-450 min, wherein the upper limit voltage is 3.65V, then charging at a constant voltage of 3.65V for 90min, stopping the current at 0.01C, and standing for 5 min;
(b) discharging the battery for 150min by using 2.5C direct current, and standing for 5min by using 2.0V lower limit voltage;
(c) charging the battery at a constant current of 1.8-2.5 ℃ for 150min, charging the battery at an upper limit voltage of 3.65V, then charging the battery at a constant voltage of 3.65V for 90min, stopping the current at 0.01C, and standing for 5min
(d) And discharging the battery for 450min by using the direct current of 0.25C, discharging the battery for 5min by using the lower limit voltage of 2.0V, and finishing the charge capacity grading treatment of alternately charging and discharging the small current and the large current.
Example 3
A lithium ion battery treatment method comprises the following specific steps:
(a) firstly, charging the battery at a constant current of 0.18C for 380min, wherein the upper limit voltage is 3.65V, then charging at a constant voltage of 3.65V for 75min, cutting off the current of 0.01C, and standing for 3 min;
(b) discharging the battery for 140min by using 2.0C direct current, and standing for 4min by using 2.0V lower limit voltage;
(c) charging the battery at 2.0C for 140min at constant current with upper limit voltage of 3.65V, charging at 3.65V at constant voltage for 75min, cutting off current at 0.01C, and standing for 4min
(d) And discharging the battery for 420min by using the direct current of 0.22C, discharging the battery for 4min by using the lower limit voltage of 2.0V, and standing the battery for 4min to finish the charge-capacitance grading treatment of alternately charging and discharging small current and large current.
Example 4
A lithium ion battery treatment method comprises the following specific steps:
(a) firstly, charging the battery at a constant current of 0.22C for 420min, wherein the upper limit voltage is 3.65V, then charging at a constant voltage of 3.65V for 85min, stopping the current at 0.01C, and standing for 5 min;
(b) discharging the battery for 120min by using 2.2C direct current, and standing for 4min by using 2.0V lower limit voltage;
(c) charging the battery for 120min at constant current of 2.2C, charging the battery for 3.65V at upper limit voltage, then charging the battery for 85min at constant voltage of 3.65V, cutting off the current for 0.01C, and standing for 4min
(d) And discharging the battery for 380min by using the 0.18C direct current, keeping the lower limit voltage at 2.0V for 4min, and finishing the low-current and high-current alternative charge-discharge charge capacity grading treatment.
Example 5
A lithium ion battery treatment method comprises the following specific steps:
(a) firstly, charging the battery at a constant current of 0.2C for 400min, wherein the upper limit voltage is 3.65V, then charging at a constant voltage of 3.65V for 80min, stopping the current at 0.01C, and standing for 4 min;
(b) discharging the battery for 120min by using 2.1C direct current, and standing for 4min by using 2.0V lower limit voltage;
(c) charging the battery at 2.1C for 120min with constant current, upper limit voltage of 3.65V, charging at 3.65V for 80min with constant voltage, stopping current at 0.01C, and standing for 4min
(d) And discharging the battery for 400min by using a 0.2C direct current, keeping the lower limit voltage at 2.0V for 4min, and finishing the low-current and high-current alternative charge-discharge charge capacity grading treatment.
Comparative example 1
A processing method of a lithium ion battery comprises the following steps:
and (3) standing the formed lithium ion battery for 3-5 days under a constant temperature condition, and then repeatedly charging and discharging the battery for 10-20 times at a current of 1C to complete the charge capacity grading of the lithium ion battery.
Effect example 1
The lithium ion battery prepared by the treatment method has the advantages of large storage capacity and long service life. Now, the gram capacity and the cycle decay of the positive electrode material of the lithium ion battery prepared in the embodiments 1 to 5 and the comparative example 1 are detected, and the results are shown in the following table:
in summary, the processing method of the lithium ion battery provided by the invention is mainly to perform the charge capacity grading on the lithium ion battery after formation processing by using the low-current and high-current alternative charge and discharge processing, and the processing method has the advantages of short production period, high equipment utilization rate and low energy consumption, and can also obviously increase the storage capacity of the battery and prolong the service life of the battery.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A lithium ion battery processing method is characterized in that the processing method mainly comprises the steps of carrying out alternate charging and discharging processing on a lithium ion battery subjected to formation processing by using low current and large current;
the small current is 0.15-0.25C; the large current is 1.8-2.5C;
the sequence of the alternating charge and discharge treatment of the small current and the large current is as follows:
(a) firstly, charging the battery for 350-450 min by using a small current, then charging for 70-90 min by using a constant voltage, and standing for 3-5 min;
(b) discharging the battery for 100-150 min by using high-current direct current, and standing for 3-5 min;
(c) charging the battery for 100-150 min at a high current and a constant current, then charging for 70-90 min at a constant voltage, and standing for 3-5 min;
(d) and discharging the battery with low-current direct current for 350-450 min, and standing for 3-5 min to finish the low-current and high-current alternative charge-discharge charge capacity grading treatment.
2. The lithium ion battery processing method according to claim 1, wherein the current during the step (a) of low current charging and the step (c) of high current charging is a constant current.
3. The lithium ion battery treatment method of claim 1, wherein the voltage for the constant voltage charging in step (a) and step (c) is 3.65V.
4. The lithium ion battery treatment method according to claim 1, wherein the upper limit voltage of the step (a) low current charging and the step (c) high current charging is 3.65V, and the lower limit voltage is 2.0V.
5. The lithium ion battery treatment method of claim 1, wherein the off-current during the constant voltage charging in step (a) and step (C) is 0.01C.
6. The lithium ion battery treatment method according to claim 1, wherein the specific sequence of the alternating low-current and high-current charge and discharge treatment is as follows:
(a) firstly, charging the battery for 350-450 min at a constant current of 0.15-0.25 ℃ and with an upper limit voltage of 3.65V, then charging for 70-90 min at a constant voltage of 3.65V and with a cutoff current of 0.01C, and standing for 3-5 min;
(b) discharging the battery for 100-150 min by direct current at 1.8-2.5 ℃, and standing for 3-5 min at the lower limit voltage of 2.0V;
(c) charging the battery for 100-150 min at a constant current of 1.8-2.5C, charging the battery at an upper limit voltage of 3.65V, then charging the battery at a constant voltage of 3.65V for 70-90 min, stopping current for 0.01C, and standing for 3-5 min;
(d) and discharging the battery for 350-450 min by using direct current of 0.15-0.25 ℃, keeping the lower limit voltage at 2.0V for 3-5 min, and finishing the alternating charge-discharge treatment of low current and large current.
7. The lithium ion battery treatment method of claim 1, further comprising the steps of measuring the voltage and internal resistance of the battery and sorting the capacity of the battery before treatment, and batteries with abnormal voltage or internal resistance and unqualified capacity are not grouped.
8. A lithium ion battery, characterized in that the lithium ion battery is prepared by the lithium ion battery treatment method of any one of claims 1 to 7.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106384853A (en) * | 2016-11-24 | 2017-02-08 | 山东精工电子科技有限公司 | Lithium ion battery stepped formation and consistency screening method |
| CN106711508A (en) * | 2016-11-29 | 2017-05-24 | 珠海汉格能源科技有限公司 | Capacity grading method of high-voltage lithium ion battery |
| CN106997960A (en) * | 2016-01-22 | 2017-08-01 | 福建猛狮新能源科技有限公司 | A kind of chemical conversion of lithium ion battery, partial volume method |
| CN107293812A (en) * | 2017-06-29 | 2017-10-24 | 青岛恒金源电子科技有限公司 | A kind of chemical conversion of lithium ion battery and method for group matching |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997960A (en) * | 2016-01-22 | 2017-08-01 | 福建猛狮新能源科技有限公司 | A kind of chemical conversion of lithium ion battery, partial volume method |
| CN106384853A (en) * | 2016-11-24 | 2017-02-08 | 山东精工电子科技有限公司 | Lithium ion battery stepped formation and consistency screening method |
| CN106711508A (en) * | 2016-11-29 | 2017-05-24 | 珠海汉格能源科技有限公司 | Capacity grading method of high-voltage lithium ion battery |
| CN107293812A (en) * | 2017-06-29 | 2017-10-24 | 青岛恒金源电子科技有限公司 | A kind of chemical conversion of lithium ion battery and method for group matching |
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