CN110880624B - Method for artificial failure of lithium ion battery - Google Patents
Method for artificial failure of lithium ion battery Download PDFInfo
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- CN110880624B CN110880624B CN201911196580.5A CN201911196580A CN110880624B CN 110880624 B CN110880624 B CN 110880624B CN 201911196580 A CN201911196580 A CN 201911196580A CN 110880624 B CN110880624 B CN 110880624B
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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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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
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- 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 method for artificial failure of a lithium ion battery, which comprises the following steps that firstly, a plurality of lithium ion battery monomers are connected in series and welded to obtain a lithium ion battery pack; secondly, calculating the number of charging and discharging times required by specific residual capacity; thirdly, connecting the lithium ion battery pack with a battery pack charging and discharging tester, manually losing efficacy to specific residual capacity according to the calculated charging and discharging times, fourthly, disassembling the lithium ion battery pack, and taking out the positive pole piece for later use. Wherein the artificial failure is charged and discharged according to the following procedures: when the circulation times are less than 3 times, standing, charging to n x 4.2V voltage with constant current of 0.1-0.5C current density, standing, discharging to n x 3.0V voltage with constant current of 0.1-0.5C current density, standing for 10min, and repeating for 3 times; and when reaching 3 times, charging to n x 4.2V voltage with constant current of 1.0-3.0C current density, standing for 10min, discharging to n x 3.0V voltage with constant current of 1.0-3.0C current density, standing for 10min, and repeating the steps until the calculated cycle number is reached. The method has the advantages that the lithium ion battery anode materials with different failure ranges are obtained by setting the charging and discharging procedures.
Description
Technical Field
The invention relates to a method for artificially disabling a lithium ion battery, and belongs to the technical field of battery testing.
Background
With the continuous update of power battery technology, the market share of new energy vehicles is gradually increased. And the market share is more expanded under the call and support of the related policies of the country. This trend tends to lead to explosive generation of retired power cells. The lithium ion power battery anode material contains abundant valuable metal resources, so that the recovery of the retired power battery has multiple benefits of resource reutilization, economy, reduction of environmental pollution and the like. At present, the recovery technology of the retired power battery mainly adopts the pretreatment-acid extraction-deep treatment process, and has complex process and serious pollution.
Therefore, the inventor adopts a direct repair technology to realize the secondary service of the lithium ion power battery anode material, the process is simplified, the cost is greatly reduced, and the pollution to the environment is reduced. Wherein, the direct regeneration and repair of the anode material is closely related to the failure degree of the anode material in the service process. For electrode materials with different failure ranges, corresponding regenerative repair techniques have not been reported, which would increase the unknown factors and process complexity of the regeneration process. Therefore, an optimal regeneration scheme is provided according to the anode materials with different failure degree ranges, and the improvement of the regeneration repair technology is facilitated.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for artificial failure of a lithium ion battery, which obtains a power battery anode material in a specific failure range by setting a charging and discharging program, and provides technical support and theoretical data for directly regenerating and repairing the anode material of the lithium ion power battery.
In order to achieve the above technical object, the present invention adopts the following technical means.
A method for artificial failure of a lithium ion battery comprises the following steps:
and step one, serially welding the lithium ion battery monomers to obtain the lithium ion battery pack.
Referring to fig. 1, a plurality of lithium ion battery cells are sequentially connected in series and welded according to the sequence of connecting the positive electrode and the negative electrode, so as to obtain a lithium ion battery pack.
And step two, calculating the charging and discharging times required by the specific residual capacity.
And calculating the charging and discharging times required in the specific residual capacity range according to the charging and discharging performance data of the single lithium ion battery, including the cycle life under the specific multiplying power and the cut-off voltage and the cycle times when the nominal capacity is more than or equal to 80 percent of the residual capacity.
And step three, connecting the lithium ion battery pack in the step one to a high-precision battery pack detector, and manually disabling the lithium ion battery pack to a specific residual capacity according to the charging and discharging times calculated in the step two.
Specifically, a charge and discharge program is set, and the charge and discharge program is set for charge and discharge according to the charge and discharge times calculated in the step two.
And step four, disassembling the lithium ion battery pack, and taking out the positive pole piece for later use.
Specifically, according to the above method for artificially disabling a lithium ion battery, in the first step, n lithium ion battery cells are sequentially connected in series according to the sequence of connecting the positive electrode and the negative electrode and are welded into a lithium ion battery pack of the specification of "n × 3.6V40 Ah", wherein n is greater than or equal to 2. As an implementation mode, 13-15 lithium ion battery cells are sequentially connected in series according to the sequence that the anode and the cathode are connected and welded to form the lithium ion battery pack with the specification of 46.8V40 Ah-54.0V 40 Ah.
Specifically, according to the method for artificially disabling the lithium ion battery, in the second step, the number of charging and discharging times required for a specific residual capacity is solved according to the cycle life of the single lithium ion battery under a specific multiplying power and a cut-off voltage and the cycle number when the residual capacity is greater than or equal to the nominal capacity of 80% of the residual capacity. The specific remaining capacity may be set as needed, for example, to 80%, 50%, and 10% remaining capacity.
Specifically, according to the method for artificially disabling the lithium ion battery, the third step is that the charge and discharge program is set as follows: the ambient temperature is 25.0 +/-1.0 ℃,
when the number of cycles is less than 3,
s1, standing;
s2, charging to n × 4.2V voltage by constant current, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s3, standing;
s4, discharging at constant current until n is 3.0V, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s5, standing;
repeating steps S2 to S5 until the number of repetitions reaches 3;
when the number of cycles reaches 3, the number of cycles,
s6, charging to n × 4.2V voltage by constant current, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s7, standing;
s8, discharging at constant current until n is 3.0V, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s9, standing;
and repeating the steps S6 to S9 until the repetition times reach the charging and discharging times calculated in the step two.
Specifically, in S2, constant current charging is carried out at a current density of 0.1-0.5C, and in S4, constant current discharging is carried out at a current density of 0.1-0.5C; in S6, the battery is charged with a constant current at a current density of 1.0-3.0C, and in S8, the battery is discharged with a constant current at a current density of 1.0-3.0C.
In the charge and discharge program, the standing time of S1, S3, S5, S7 and S9 is 0-30 min.
Specifically, as an implementable scheme, according to the above method for artificially disabling a lithium ion battery, step three, the charging and discharging procedure is set as follows: the ambient temperature is 25.0 +/-1.0 ℃,
when the number of cycles is less than 3,
s1, standing for 10 min;
s2, charging to n x 4.2V voltage with constant current of 0.5C current density, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s3, standing for 10 min;
s4, discharging to n x 3.0V voltage with constant current of 0.5C current density, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s5, standing for 10 min;
repeating for 2 to 5 times until the repetition times reach 3 times;
when the number of cycles reaches 3 times,
s6, charging to n x 4.2V voltage with a constant current of 1.25C current density, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s7, standing for 10 min;
s8, discharging to n x 3.0V voltage with constant current of 1.25C current density, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s9, standing for 10 min;
and repeating the steps S6 to S9 until the repetition times reach the charging and discharging times calculated in the step two.
Specifically, according to the method for artificially disabling the lithium ion battery, the fourth specific method is to disassemble the lithium ion battery pack after the circulation is finished; and then disassembling the obtained power battery monomer in an argon atmosphere glove box, taking out the positive pole piece, and packaging and storing the positive pole piece for the requirements of the regeneration repair experiment.
By adopting the technical scheme, the invention has the following technical effects.
1. According to the regeneration and repair technology of the lithium ion battery, the invention firstly provides an artificial failure scheme and obtains the anode material with specific failure degree.
2. According to the invention, through setting a charging and discharging program, the lithium ion battery anode materials with different specific failure ranges are obtained.
3. The invention realizes the regulation and control of the welding quantity of the lithium ion battery monomers according to the conditions of the quantity of the required anode materials, the specification of a charge and discharge tester and the like.
4. In the range of safe conditions, the failure speed of the battery pack can be adjusted by adjusting the test environment (temperature and humidity), the charge-discharge multiplying power and the test voltage, specifically, the test temperature is 25.0 +/-1.0 ℃, the humidity is below 45%, the charge multiplying power is controlled below 2.0C multiplying power according to the rapid failure degree and the specification of a charge-discharge tester, the discharge multiplying power is controlled within 3.0C multiplying power, and the test voltage is in the range of 2.80-4.30V.
Drawings
FIG. 1 is a schematic diagram of a lithium ion battery pack obtained by welding lithium ion battery cells in series according to the present invention.
Fig. 2 is a flowchart of a charging and discharging procedure of the lithium ion battery pack according to embodiment 1 of the present invention.
Detailed Description
The following further describes the technical solutions of the present invention with reference to specific embodiments, so that those skilled in the art can better understand the present invention and can implement the present invention.
The invention provides a method for artificial failure of a lithium ion battery, which comprises the following steps:
and step one, serially welding the lithium ion battery monomers to obtain the lithium ion battery pack.
Specifically, n lithium ion battery cells are sequentially connected in series according to the sequence that a positive electrode and a negative electrode are connected and welded to form the lithium ion battery pack with the specification of 'n x 3.6V40 Ah', wherein n is more than or equal to 2.
And step two, calculating the charging and discharging times required by the specific residual capacity.
And calculating the charging and discharging times required in the specific residual capacity range according to the charging and discharging performance data of the single lithium ion battery, including the cycle life under the specific multiplying power and the cut-off voltage and the cycle times when the nominal capacity is more than or equal to 80 percent of the residual capacity. The specific remaining capacity may be set as needed, for example, to 80%, 50%, and 10% remaining capacity.
And step three, connecting the lithium ion battery pack in the step one to a high-precision battery pack detector, and manually disabling the lithium ion battery pack to a specific residual capacity according to the charging and discharging times calculated in the step two.
Specifically, a charge and discharge program is set, and the charge and discharge program is set for charge and discharge according to the charge and discharge times calculated in the step two.
Specifically, according to the method for artificially disabling the lithium ion battery, the third step is that the charge and discharge program is set as follows: the ambient temperature is 25.0 +/-1.0 ℃,
when the number of cycles is less than 3,
s1, standing;
s2, charging to n × 4.2V voltage by constant current, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s3, standing;
s4, discharging at constant current until n is 3.0V, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s5, standing;
repeating steps S2 to S5 until the number of repetitions reaches 3;
when the number of cycles reaches 3, the number of cycles,
s6, charging to n × 4.2V voltage by constant current, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s7, standing;
s8, discharging at constant current until n is 3.0V, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack;
s9, standing;
and repeating the steps S6 to S9 until the repetition times reach the charging and discharging times calculated in the step two.
Specifically, in S2, constant current charging is carried out at a current density of 0.1-0.5C, and in S4, constant current discharging is carried out at a current density of 0.1-0.5C; in S6, the battery is charged with a constant current at a current density of 1.0-3.0C, and in S8, the battery is discharged with a constant current at a current density of 1.0-3.0C.
In the charge and discharge program, the standing time of S1, S3, S5, S7 and S9 is 0-30 min.
And step four, disassembling the lithium ion battery pack, and taking out the positive pole piece for later use.
Specifically, after the circulation is finished, disassembling the lithium ion battery pack; and then disassembling the obtained power battery monomer in an argon atmosphere glove box, taking out the positive pole piece, and packaging and storing the positive pole piece for the requirements of the regeneration repair experiment.
The above method is described below by using a specific embodiment, and it should be noted that, although the following embodiment performs manual invalidation according to the corresponding parameter conditions, similar effects can be achieved by selecting other parameters in the above method to perform manual invalidation.
Example 1
A method for artificial failure of a lithium ion battery comprises the following steps:
and step one, serially welding the lithium ion battery monomers to obtain the lithium ion battery pack.
The 13 lithium ion battery monomers are sequentially connected in series according to the sequence of connecting the positive electrode and the negative electrode and are welded into a lithium ion battery pack with the following specification: 46.8V40 Ah.
And step two, calculating the charging and discharging times required by the specific residual capacity.
According to the charge and discharge performance data of the lithium ion battery monomer, including the cycle life under specific multiplying power and cut-off voltage and the cycle frequency when the nominal capacity is more than or equal to 80%, the charge and discharge frequency required by 80% of the residual capacity is calculated.
And step three, connecting the lithium ion battery pack obtained in the step one to a high-precision battery pack detector, and artificially disabling the lithium ion battery pack to 80% of residual capacity according to the charging and discharging times calculated in the step two.
Referring to fig. 2, the charge and discharge program is set as follows: the ambient temperature is 25.0 +/-1.0 ℃,
when the number of cycles is less than 3,
s1, standing for 10min,
s2, charging to n × 4.2V with constant current at 0.5C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 13,
s3, standing for 10min,
s4, discharging to n × 3.0V voltage with constant current of 0.5C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 13,
s5, standing for 10min,
repeat S2 to S5 until the number of repetitions reaches 3.
When the number of cycles reaches 3 times,
s6, charging to n × 4.2V with constant current at 1.25C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 13,
s7, standing for 10min,
s8, discharging to n × 3.0V voltage with constant current at 1.25C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this example 13,
s9, standing for 10min,
and repeating the steps S6 to S9 until the repetition times reach the charging and discharging times calculated in the step two.
And step four, disassembling the lithium ion battery pack and taking out the positive pole piece.
After circulation is finished, disassembling the lithium ion battery pack; and then disassembling the obtained power battery monomer in an argon atmosphere glove box, taking out the positive pole piece, and packaging and storing the positive pole piece for the requirements of the regeneration repair experiment.
In the embodiment, the model of the lithium ion battery monomer is LP2714895-40Ah, which is provided by Shanxi coal industry, chemical and technical research institute, Inc.; the high-precision battery pack detector is a high-precision battery pack tester of Shenzhen constant wing energy science and technology Limited and has the model number of HYNN-PT10050A-2 CH.
Example 2
A method for artificial failure of a lithium ion battery comprises the following steps:
and step one, serially welding the lithium ion battery monomers to obtain the lithium ion battery pack.
The method comprises the following steps of sequentially connecting 15 lithium ion battery monomers in series according to the sequence of connecting the positive electrode and the negative electrode, and welding the lithium ion battery monomers into a lithium ion battery pack with the following specification: 54.0V40 Ah.
And step two, calculating the charging and discharging times required by the specific residual capacity.
According to the charge and discharge performance data of the lithium ion battery monomer, including the cycle life under specific multiplying power and cut-off voltage and the cycle frequency when the nominal capacity is more than or equal to 80%, the charge and discharge frequency required by 50% of the residual capacity is calculated.
And step three, connecting the lithium ion battery pack obtained in the step one to a high-precision battery pack detector, and artificially disabling the lithium ion battery pack to 50% of residual capacity according to the charging and discharging times calculated in the step two.
The charge and discharge program was set as follows: the ambient temperature is 25.0 +/-1.0 ℃,
when the number of cycles is less than 3,
s1, standing for 10min,
s2, charging to n × 4.2V with constant current at 0.1C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 15,
s3, standing for 10min,
s4, discharging to n × 3.0V voltage with constant current of 0.1C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 15,
s5, standing for 10min,
repeat S2 to S5 until the number of repetitions reaches 3.
When the number of cycles reaches 3 times,
s6, charging to n × 4.2V with a constant current of 1.0C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 15,
s7, standing for 10min,
s8, discharging with constant current at 1.0C current density to n × 3.0V, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 15,
s9, standing for 10min,
and repeating the steps S6 to S9 until the repetition times reach the charging and discharging times calculated in the step two.
And step four, disassembling the lithium ion battery pack and taking out the positive pole piece.
After circulation is finished, disassembling the lithium ion battery pack; and then disassembling the obtained power battery monomer in an argon atmosphere glove box, taking out the positive pole piece, and packaging and storing the positive pole piece for the requirements of the regeneration repair experiment.
In the embodiment, the model of the lithium ion battery monomer is LP2714895-40Ah, which is provided by Shanxi coal industry, chemical and technical research institute, Inc.; the high-precision battery pack detector is a high-precision battery pack tester of Shenzhen constant wing energy science and technology Limited and has the model number of HYNN-PT10050A-2 CH.
Example 3
A method for artificial failure of a lithium ion battery comprises the following steps:
and step one, serially welding the lithium ion battery monomers to obtain the lithium ion battery pack.
The 13 lithium ion battery monomers are sequentially connected in series according to the sequence of connecting the positive electrode and the negative electrode and are welded into a lithium ion battery pack with the following specification: 46.8V40 Ah.
And step two, calculating the charging and discharging times required by the specific residual capacity.
According to the charge and discharge performance data of the lithium ion battery monomer, including the cycle life under specific multiplying power and cut-off voltage and the cycle frequency when the nominal capacity is more than or equal to 80%, the charge and discharge frequency required by 10% of residual capacity is calculated.
And step three, connecting the lithium ion battery pack obtained in the step one to a high-precision battery pack detector, and artificially disabling the lithium ion battery pack to 80% of residual capacity according to the charging and discharging times calculated in the step two.
The charge and discharge program was set as follows: the environmental temperature is 25.0 +/-1.0 ℃, when the cycle time is less than 3 times,
s1, standing for 10min,
s2, charging to n × 4.2V with constant current at 0.25C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 13,
s3, standing for 10min,
s4, discharging to n × 3.0V voltage with constant current at 0.25C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 13,
s5, standing for 10min,
repeat S2 to S5 until the number of repetitions reaches 3.
When the number of cycles reaches 3 times,
s6, charging to n × 4.2V with constant current at 5.0C current density, where n is the number of lithium ion battery cells in the lithium ion battery pack, in this embodiment 13,
s7, standing for 10min,
s8, then discharging at constant current with 5.0C current density to voltage of n x 3.0V (wherein n is the number of lithium ion battery cells in the lithium ion battery pack),
s9, standing for 10min,
and repeating the steps S6 to S9 until the repetition times reach the charging and discharging times calculated in the step two.
And step four, disassembling the lithium ion battery pack and taking out the positive pole piece.
After circulation is finished, disassembling the lithium ion battery pack; and then disassembling the obtained power battery monomer in an argon atmosphere glove box, taking out the positive pole piece, and packaging and storing the positive pole piece for the requirements of the regeneration repair experiment.
In the embodiment, the model of the lithium ion battery monomer is LP2714895-40Ah, which is provided by Shanxi coal industry, chemical and technical research institute, Inc.; the high-precision battery pack detector is a high-precision battery pack tester of Shenzhen constant wing energy science and technology Limited and has the model number of HYNN-PT10050A-2 CH.
The technical solution provided by the present invention is not limited by the above embodiments, and all technical solutions formed by utilizing the structure and the mode of the present invention through conversion and substitution are within the protection scope of the present invention.
Claims (7)
1. A method for artificially disabling a lithium ion battery is characterized by comprising the following steps:
firstly, serially welding lithium ion battery monomers to obtain a lithium ion battery pack,
sequentially connecting a plurality of lithium ion battery monomers in series according to the sequence of connecting the positive electrode and the negative electrode and welding to obtain a lithium ion battery pack;
step two, calculating the charging and discharging times required by the specific residual capacity,
calculating the charging and discharging times required in a specific residual capacity range according to the charging and discharging performance data of the lithium ion battery monomer, including the cycle life under a specific multiplying power and a cut-off voltage, and the cycle times when the nominal capacity is more than or equal to 80% of the residual capacity;
connecting the lithium ion battery pack in the step one to a high-precision battery pack detector, and artificially disabling the lithium ion battery pack to a specific residual capacity according to the charging and discharging times calculated in the step two;
the manual failure method of the third step is that the charging and discharging procedure is,
when the number of cycles is less than 3,
s1, standing;
s2, charging to n x 4.2V voltage by constant current, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack, and charging by constant current with the current density of 0.1-0.5C;
s3, standing;
s4, discharging to n x 3.0V voltage in constant current, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack, and discharging in constant current with the current density of 0.1-0.5C;
s5, standing;
repeating steps S2 to S5 until the number of repetitions reaches 3;
when the number of cycles reaches 3, the number of cycles,
s6, charging to n x 4.2V voltage by constant current, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack, and charging by constant current with the current density of 1.0-3.0C;
s7, standing;
s8, discharging to n x 3.0V voltage in constant current, wherein n is the number of lithium ion battery monomers in the lithium ion battery pack, and discharging in constant current with the current density of 1.0-3.0C;
s9, standing;
repeating the steps S6 to S9 until the repetition times reach the charging and discharging times calculated in the step two;
and step four, disassembling the lithium ion battery pack, and taking out the positive pole piece for later use.
2. The method for artificially disabling a lithium ion battery according to claim 1, wherein: in the charge and discharge program, the standing time of S1, S3, S5, S7 and S9 is 0-30 min.
3. The method for artificially disabling a lithium ion battery according to claim 1, wherein: and the environmental temperature of the artificial failure method in the third step is 25.0 +/-1.0 ℃.
4. The method for artificially disabling a lithium ion battery according to claim 1, wherein: in the first step, the plurality of lithium ion battery cells are two or more lithium ion battery cells.
5. The method for artificially disabling a lithium ion battery according to claim 4, wherein: in the first step, the plurality of lithium ion battery cells are 13-15 lithium ion battery cells.
6. The method for artificially disabling a lithium ion battery according to claim 1, wherein: in the second step, the specific residual capacity is 10-80% of the residual capacity.
7. The method for artificially disabling a lithium ion battery according to claim 1, wherein: fourthly, disassembling the lithium ion battery pack after circulation is finished; and then disassembling the obtained power battery monomer in an argon atmosphere glove box, taking out the positive pole piece, and packaging and storing the positive pole piece for the requirements of the regeneration repair experiment.
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