CN114720526B - Rapid evaluation method for cycle performance of lithium iron phosphate material - Google Patents
Rapid evaluation method for cycle performance of lithium iron phosphate material Download PDFInfo
- Publication number
- CN114720526B CN114720526B CN202210299729.8A CN202210299729A CN114720526B CN 114720526 B CN114720526 B CN 114720526B CN 202210299729 A CN202210299729 A CN 202210299729A CN 114720526 B CN114720526 B CN 114720526B
- Authority
- CN
- China
- Prior art keywords
- rct
- battery
- iron phosphate
- lithium iron
- phosphate material
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
-
- 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 relates to a rapid evaluation method for the cycle performance of a lithium iron phosphate material, which comprises the following steps: (1) Diffusion resistance of half-cell EIS test of lithium iron phosphate and standard lithium iron phosphate to be measured respectively; (2) Comparing the battery to be tested with a standard battery, and circulating the charge transfer impedance increase rate of the negative electrode sheet EIS test after a certain number of times; (3) Judging according to the comparative analysis of the step (1) and the step (2), and if the judgment is impossible, carrying out the next step; (4) And testing and recording the highest temperature of the surface center of the battery to be tested in the circulating process, and judging again according to the result. The rapid evaluation method for the cycling performance of the lithium iron phosphate material can rapidly screen and evaluate the lithium iron phosphate material, shortens the evaluation period of the lithium iron phosphate material, and is simple and easy to operate and realize.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a rapid evaluation method for cycle performance of a lithium iron phosphate material.
Background
The lithium ion battery has the outstanding advantages of high energy density, no memory effect, long cycle life, rapid charge and discharge, less self discharge and the like, and particularly, the lithium iron phosphate battery has long cycle life and safety, is widely applied to the energy storage fields of portable equipment, electric automobiles, aerospace and the like, and has great market demands.
General materials, manufacturing processes, tests and the like can influence the cycle life of the lithium iron phosphate battery, and the lithium iron phosphate is used as a core material of the lithium ion battery, and the quality of the material can influence the cycle performance of the lithium ion battery, so that the lithium iron phosphate serving as a positive electrode material is an important subject for evaluating the high efficiency of the lithium iron phosphate in a limited time.
In the prior art, in the evaluation method for the lithium iron phosphate material, the lithium iron phosphate material is generally used as a positive electrode material to prepare a lithium ion battery, and then a normal-temperature cycle test is carried out, wherein the normal-temperature cycle test is generally as follows: the normal temperature 1C is charged and discharged, the 1-time cycle test requires about 3 hours, and the normal temperature cycle test requires 3000 times of cycle tests, namely about 1 year, to obtain the result of the cycle test. The lithium iron phosphate is evaluated and screened through the cycle performance test result, but the material test time is long, and the whole test period is long.
Disclosure of Invention
The invention aims to provide a rapid evaluation method for the cycle performance of a lithium iron phosphate material, which can rapidly evaluate the cycle performance of the lithium iron phosphate material and is convenient and simple to operate.
The invention solves the problems by adopting the following technical scheme: a rapid evaluation method for the cycle performance of a lithium iron phosphate material comprises the following steps:
(1) Respectively testing electrochemical impedance spectrums EIS of half batteries of a standard lithium iron phosphate material L and a lithium iron phosphate material L-1 to be tested to obtain diffusion impedance of L and L-1, and respectively marking the diffusion impedance as diffusion impedance (L) and diffusion impedance (L-1);
(2) The method comprises the steps of marking a battery prepared from a standard lithium iron phosphate material L as a standard battery B, marking a battery prepared from a to-be-detected lithium iron phosphate material L-1 as a to-be-detected battery B-1, performing normal temperature 1C cycle test on the battery B and the battery B-1, disassembling the battery when the battery is cycled for 100 times and 500 times, taking out a negative plate, assembling a half battery, wherein the negative plates of the battery B and the battery B-1 are respectively marked as N (100) and N-1 (100), the negative plates of the battery B and the battery B-1 are respectively marked as N (500) and N-1 (500), respectively marking the negative plates of the battery B and the battery B-1 for 500 times as N (500) and N-1 (100), performing electrochemical impedance spectrum EIS test on the half battery for both N (100) and N (500) and N-1 (500), and obtaining electric charge transfer internal resistances Rct (N (100)), rct (N-1 (100)).
The battery B-1 to be tested is different from the standard battery B only in that the positive pole lithium iron phosphate material is different, the standard battery B adopts a standard lithium iron phosphate material L with qualified cycle performance, and the positive pole material of the battery B-1 to be tested is the lithium iron phosphate material L-1 to be tested;
(3) Comparing the result of the step (1) with the diffusion impedance (L-1) by comparing the magnitude relation of the diffusion impedance (L);
(4) Calculating the result of the step (2) to obtain the growth rate of the Rct of the standard battery B negative electrode plate and the Rct of the battery B-1 negative electrode plate to be detected, wherein the growth rate of the Rct is respectively the growth rate of the Rct (N), the growth rate of the Rct (N-1), and carrying out comparative analysis;
(5) Judging according to the comparison analysis of the step (3) and the step (4):
if the diffusion resistance (L-1) is less than or equal to the diffusion resistance (L) and the increase rate of Rct (N-1 (500)) is less than or equal to Rct (N (500)), the normal temperature cycle performance of the lithium iron phosphate material L-1 can be judged to be superior or equal to that of the lithium iron phosphate material L;
if the diffusion resistance (L-1) > the diffusion resistance (L) and the increase rate of Rct (N-1 (500)) is greater than Rct (N (500)), it can be judged that the normal temperature cycle performance of the lithium iron phosphate material L-1 is worse than that of the lithium iron phosphate material L;
if the diffusion resistance (L-1) is less than or equal to the diffusion resistance (L), and the increase rate of Rct (N-1 (500)) is more than Rct (N (500)), performing the next step;
if the diffusion resistance (L-1) > the diffusion resistance (L) and the increase rate of Rct (N-1 (500)) is less than or equal to Rct (N (500)), then the next step is performed;
(6) In the circulation process, detecting and recording the temperatures of the surface centers of the standard battery B and the battery B-1 to be detected, wherein the highest temperatures of the surfaces of the standard battery B and the battery B-1 to be detected are respectively marked as T (B) and T (B-1);
(7) Based on the result of step (6), again making a judgment:
the diffusion resistance (L-1) is less than or equal to the diffusion resistance (L), the increase rate of Rct (N-1 (500)) is more than Rct (N (500)), the relation between T (B-1) and 30 ℃ is further compared, if T (B-1) is less than or equal to 30 ℃, the normal temperature cycle performance of the lithium iron phosphate material L-1 is judged to be better than or equal to that of the lithium iron phosphate material L, otherwise if T (B-1) is more than 30 ℃, the normal temperature cycle performance of the lithium iron phosphate material L-1 is judged to be worse than that of the lithium iron phosphate material L;
the diffusion resistance (L-1) > the diffusion resistance (L), and the increase rate of Rct (N-1 (500)) is less than or equal to Rct (N (500)), the relation between T (B-1) and 30 ℃ and 35 ℃ is further compared, if the temperature of 35 ℃ is more than or equal to T (B-1) and more than or equal to 30 ℃, the normal temperature cycle performance of the lithium iron phosphate material L-1 is judged to be better than or equal to that of the lithium iron phosphate material L, otherwise if the temperature of T (B-1) is less than 30 ℃ or more than 35 ℃, the normal temperature cycle performance of the lithium iron phosphate material L-1 is judged to be worse than that of the lithium iron phosphate material L.
Preferably, the normal temperature cycle test specifically comprises: under normal temperature, the charge and discharge current of the battery is 1C, the voltage interval of charge and discharge is set to be 2.5-3.65V, and the battery is kept still for 30min after the charge and the discharge are finished.
Preferably, the increase rate of Rct (N-1) = [ Rct (N-1 (500)) -Rct (N-1 (100)) ]/Rct (N-1 (100)),
the growth rate of Rct (N) = [ Rct (N (500)) -Rct (N (100)) ]/Rct (N (100)).
Compared with the prior art, the invention has the advantages that:
the invention provides a rapid evaluation method for the cycle performance of a lithium iron phosphate material, which can rapidly screen and evaluate the lithium iron phosphate material, shortens the evaluation period of the lithium iron phosphate material, and is simple and easy to operate and realize.
Detailed Description
The present invention is described in further detail below with reference to examples.
Example 1
A rapid evaluation method of lithium iron phosphate material comprises the following steps:
(1) Testing the EIS of half batteries of a standard lithium iron phosphate material L and a lithium iron phosphate material L-1 to be tested to obtain diffusion impedance of L and L-1, and respectively marking the diffusion impedance as diffusion impedance (L) and diffusion impedance (L-1);
(2) Testing EIS of half batteries of negative plates of standard battery B and battery B-1 to be tested, wherein the negative plates are cycled for 100 times and 500 times at normal temperature 1C, obtaining charge transfer internal resistance Rct (N (100)), rct (N (500)), rct (N-1 (100)), rct (N-1 (500)), and calculating the growth rate of Rct;
(3) The results of step (1) and step (2) are shown in the following table:
TABLE 1 diffusion resistance of half-cells of different lithium iron phosphate materials
TABLE 2 Charge transfer impedances of negative half-cells of different cells
Note that: 125 (47%) represents that the retention of Rct after 500 cycles relative to Rct after 100 cycles is 47%, and so on.
As is clear from Table 1, the diffusion resistance (L-1) < diffusion resistance (L), and from Table 2, the increase in Rct of the negative electrode N-1 of the battery B-1 to be measured < the increase rate of Rct of the negative electrode N of the standard battery B, it was judged that the normal temperature cycle performance of the lithium iron phosphate L-1 was superior to that of the lithium iron phosphate L.
Example 2
A rapid evaluation method of lithium iron phosphate material comprises the following steps:
(1) Testing the EIS of half batteries of a standard lithium iron phosphate material L and a lithium iron phosphate material L-2 to be tested to obtain diffusion impedance of L and L-2, and respectively marking the diffusion impedance as diffusion impedance (L) and diffusion impedance (L-2);
(2) Testing EIS of half batteries of negative plates of standard battery B and battery B-2 to be tested, wherein the negative plates are cycled for 100 times and 500 times at normal temperature 1C, obtaining charge transfer internal resistance Rct (N (100)), rct (N (500)), rct (N-2 (100)), rct (N-2 (500)), and calculating the growth rate of Rct;
(3) The results of step (1) and step (2) are shown in the following table:
TABLE 3 diffusion resistance of different lithium iron phosphate material half-cells
TABLE 4 Charge transfer impedances of negative half-cells of different cells
Note that: 125 (47%) represents that the retention of Rct after 500 cycles relative to Rct after 100 cycles is 47%, and so on.
As is clear from Table 3, the diffusion resistance (L-2) > diffusion resistance (L), and from Table 4, the increase in Rct of the negative electrode N-2 of the battery B-2 to be measured < the increase rate of Rct of the negative electrode N of the standard battery B, it was determined that the normal temperature cycle performance of the lithium iron phosphate L-2 was inferior to that of the lithium iron phosphate L.
Example 3
A rapid evaluation method of lithium iron phosphate material comprises the following steps:
(1) Testing the EIS of half batteries of a standard lithium iron phosphate material L and a lithium iron phosphate material L-3 to be tested to obtain diffusion impedance of L and L-3, and respectively marking the diffusion impedance as diffusion impedance (L) and diffusion impedance (L-3);
(2) Testing EIS of half batteries of negative plates of standard battery B and battery B-3 to be tested, wherein the negative plates are cycled for 100 times and 500 times at normal temperature 1C, obtaining charge transfer internal resistance Rct (N (100)), rct (N (500)), rct (N-3 (100)), rct (N-3 (500)), and calculating the growth rate of Rct;
(3) During the cycle, the temperature of the center of the surface of the battery is detected and recorded, and the highest temperature of the surface of the battery B-3 is recorded as T (B-3) =29 ℃;
(4) The results of steps (1) and (2) are shown in the following table:
TABLE 5 diffusion resistance of different lithium iron phosphate material half-cells
TABLE 6 Charge transfer impedances of negative half-cells of different cells
Note that: 125 (47%) represents that the retention of Rct after 500 cycles relative to Rct after 100 cycles is 47%, and so on.
As can be seen from table 5, the diffusion resistance (L-3) < diffusion resistance (L), and from table 6, the increase of Rct of the negative electrode N-3 of the battery B-3 to be measured > the increase rate of Rct of the negative electrode N of the standard battery B, and T (B-3) =29 ℃ below 30 ℃, it was determined that the normal temperature cycle performance of the lithium iron phosphate L-3 was superior to that of the lithium iron phosphate L.
Example 4
A rapid evaluation method of lithium iron phosphate material comprises the following steps:
(1) Testing the EIS of half batteries of a standard lithium iron phosphate material L and a lithium iron phosphate material L-4 to be tested to obtain diffusion impedance of L and L-4, and respectively marking the diffusion impedance as diffusion impedance (L) and diffusion impedance (L-4);
(2) Testing EIS of half batteries of negative plates of standard battery B and battery B-4 to be tested, wherein the half batteries are cycled for 100 times and 500 times at normal temperature 1C, obtaining charge transfer internal resistance Rct (N (100)), rct (N (500)), rct (N-4 (100)), rct (N-4 (500)), and calculating the growth rate of Rct;
(3) The temperature at the center of the cell surface during the cycle was detected and recorded, and the highest temperature at the surface of cell B-4 was recorded as T (B-4) =40 ℃.
(4) The results of steps (1) and (2) are shown in the following table:
TABLE 7 diffusion resistance of half-cells of different lithium iron phosphate materials
TABLE 8 Charge transfer impedances of negative half-cells of different cells
Note that: 125 (47%) represents that the retention rate of Rct after 500 cycles relative to Rct after 100 cycles is 47%, and so on
As can be seen from table 7, the diffusion resistance (L-4) > diffusion resistance (L), and as can be seen from table 8, the increase in Rct of the negative electrode N-4 of the battery B-4 to be measured was less than the increase rate of Rct of the negative electrode N of the standard battery B, and T (B-4) =40 ℃ to > 35 ℃, it was determined that the normal temperature cycle performance of the lithium iron phosphate L-4 was inferior to that of the lithium iron phosphate L.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.
Claims (3)
1. A rapid evaluation method for the cycle performance of a lithium iron phosphate material is characterized by comprising the following steps: the method comprises the following steps:
(1) Respectively testing electrochemical impedance spectrums EIS of half batteries of a standard lithium iron phosphate material L and a lithium iron phosphate material L-1 to be tested to obtain diffusion impedance of L and L-1, and respectively marking the diffusion impedance as diffusion impedance (L) and diffusion impedance (L-1);
(2) The method comprises the steps of marking a battery prepared from a standard lithium iron phosphate material L as a standard battery B, marking a battery prepared from a lithium iron phosphate material L-1 to be tested as a battery B-1 to be tested, performing normal temperature 1C cycle test on the battery B and the battery B-1, disassembling the battery after 100 cycles and 500 cycles, taking out a negative plate, assembling a half battery, wherein the negative plates of the battery B and the battery B-1 are respectively marked as N (100) and N-1 (100), the negative plates of the battery B and the battery B-1 are respectively marked as N (500) and N-1 (500), respectively marking the negative plates of the battery B and the battery B-1 for 500 cycles as N (500) and N-1 (100), performing electrochemical impedance spectrum EIS test on the half battery on both N (500) and N-1 (500), and obtaining the internal resistance Rct (N (100)), rct (N (500)), rct (N-1 (100)), rct (N-1 (500);
the battery B-1 to be tested is different from the standard battery B only in that the positive pole lithium iron phosphate material is different, the standard battery B adopts a standard lithium iron phosphate material L with qualified cycle performance, and the positive pole material of the battery B-1 to be tested is the lithium iron phosphate material L-1 to be tested;
(3) Comparing the result of the step (1) with the diffusion impedance (L-1) by comparing the magnitude relation of the diffusion impedance (L);
(4) Calculating the result of the step (2) to obtain the growth rate of the Rct of the standard battery B negative electrode plate and the Rct of the battery B-1 negative electrode plate to be detected, wherein the growth rate of the Rct is respectively the growth rate of the Rct (N), the growth rate of the Rct (N-1), and carrying out comparative analysis;
(5) Judging according to the comparison analysis of the step (3) and the step (4):
if the diffusion resistance (L-1) is less than or equal to the diffusion resistance (L) and the increase rate of Rct (N-1 (500)) is less than or equal to Rct (N (500)), the normal temperature cycle performance of the lithium iron phosphate material L-1 can be judged to be superior or equal to that of the lithium iron phosphate material L;
if the diffusion resistance (L-1) > the diffusion resistance (L) and the increase rate of Rct (N-1 (500)) is greater than Rct (N (500)), it can be judged that the normal temperature cycle performance of the lithium iron phosphate material L-1 is worse than that of the lithium iron phosphate material L;
if the diffusion resistance (L-1) is less than or equal to the diffusion resistance (L), and the increase rate of Rct (N-1 (500)) is more than Rct (N (500)), performing the next step;
if the diffusion resistance (L-1) > the diffusion resistance (L) and the increase rate of Rct (N-1 (500)) is less than or equal to Rct (N (500)), then the next step is performed;
(6) In the circulation process, detecting and recording the temperatures of the surface centers of the standard battery B and the battery B-1 to be detected, wherein the highest temperatures of the surfaces of the standard battery B and the battery B-1 to be detected are respectively marked as T (B) and T (B-1);
(7) Based on the result of step (6), again making a judgment:
the diffusion resistance (L-1) is less than or equal to the diffusion resistance (L), the increase rate of Rct (N-1 (500)) is more than Rct (N (500)), the relation between T (B-1) and 30 ℃ is further compared, if T (B-1) is less than or equal to 30 ℃, the normal temperature cycle performance of the lithium iron phosphate material L-1 is judged to be better than or equal to that of the lithium iron phosphate material L, otherwise if T (B-1) is more than 30 ℃, the normal temperature cycle performance of the lithium iron phosphate material L-1 is judged to be worse than that of the lithium iron phosphate material L;
the diffusion resistance (L-1) > the diffusion resistance (L), and the increase rate of Rct (N-1 (500)) is less than or equal to Rct (N (500)), the relation between T (B-1) and 30 ℃ and 35 ℃ is further compared, if the temperature of 35 ℃ is more than or equal to T (B-1) and more than or equal to 30 ℃, the normal temperature cycle performance of the lithium iron phosphate material L-1 is judged to be better than or equal to that of the lithium iron phosphate material L, otherwise if the temperature of T (B-1) is less than 30 ℃ or more than 35 ℃, the normal temperature cycle performance of the lithium iron phosphate material L-1 is judged to be worse than that of the lithium iron phosphate material L.
2. The rapid evaluation method of the cycling performance of the lithium iron phosphate material according to claim 1, wherein the method comprises the following steps: the normal temperature cycle test specifically comprises the following steps: under normal temperature, the charge and discharge current of the battery is 1C, the voltage interval of charge and discharge is set to be 2.5-3.65V, and the battery is kept still for 30min after the charge and the discharge are finished.
3. The rapid evaluation method of the cycle performance of a lithium iron phosphate material according to claim 1, characterized in that the increase rate of Rct (N-1) = [ Rct (N-1 (500)) -Rct (N-1 (100)) ] -Rct (N-1 (100)), the increase rate of Rct (N) = [ Rct (N (500)) -Rct (N (100)) ] -Rct (N (100)).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210299729.8A CN114720526B (en) | 2022-03-25 | 2022-03-25 | Rapid evaluation method for cycle performance of lithium iron phosphate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210299729.8A CN114720526B (en) | 2022-03-25 | 2022-03-25 | Rapid evaluation method for cycle performance of lithium iron phosphate material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114720526A CN114720526A (en) | 2022-07-08 |
| CN114720526B true CN114720526B (en) | 2023-08-04 |
Family
ID=82240177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210299729.8A Active CN114720526B (en) | 2022-03-25 | 2022-03-25 | Rapid evaluation method for cycle performance of lithium iron phosphate material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114720526B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094621A (en) * | 2013-01-30 | 2013-05-08 | 浙江超威创元实业有限公司 | Lithium ion battery formation method and device |
| CN103487762A (en) * | 2013-09-30 | 2014-01-01 | 国家电网公司 | Screening method for lithium ion batteries |
| CN110376525A (en) * | 2019-07-29 | 2019-10-25 | 国网河南省电力公司电力科学研究院 | A method of evaluating retired ferric phosphate lithium cell life time decay performance |
| CN110568363A (en) * | 2019-07-29 | 2019-12-13 | 国网河南省电力公司电力科学研究院 | Method for prejudging lithium dendrite generation of retired battery based on SEI film impedance change |
| CN111983477A (en) * | 2020-08-24 | 2020-11-24 | 哈尔滨理工大学 | Lithium ion battery safety degree estimation method and estimation device based on impedance spectrum model |
| CN112763545A (en) * | 2020-12-30 | 2021-05-07 | 宁德新能源科技有限公司 | Method for processing and reading alternating current impedance data of lithium ion battery EIS and battery testing equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130069660A1 (en) * | 2010-02-17 | 2013-03-21 | Julien Bernard | Method for in situ battery diagnostic by electrochemical impedance spectroscopy |
| CN105826607B (en) * | 2016-05-25 | 2019-05-14 | 宁德新能源科技有限公司 | A kind of electrolyte and the lithium ion battery including the electrolyte |
| WO2018087966A1 (en) * | 2016-11-11 | 2018-05-17 | 日本碍子株式会社 | Ic power source, various ic products provided with same, method for supplying power to ic, and method for driving ic |
-
2022
- 2022-03-25 CN CN202210299729.8A patent/CN114720526B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094621A (en) * | 2013-01-30 | 2013-05-08 | 浙江超威创元实业有限公司 | Lithium ion battery formation method and device |
| CN103487762A (en) * | 2013-09-30 | 2014-01-01 | 国家电网公司 | Screening method for lithium ion batteries |
| CN110376525A (en) * | 2019-07-29 | 2019-10-25 | 国网河南省电力公司电力科学研究院 | A method of evaluating retired ferric phosphate lithium cell life time decay performance |
| CN110568363A (en) * | 2019-07-29 | 2019-12-13 | 国网河南省电力公司电力科学研究院 | Method for prejudging lithium dendrite generation of retired battery based on SEI film impedance change |
| CN111983477A (en) * | 2020-08-24 | 2020-11-24 | 哈尔滨理工大学 | Lithium ion battery safety degree estimation method and estimation device based on impedance spectrum model |
| CN112763545A (en) * | 2020-12-30 | 2021-05-07 | 宁德新能源科技有限公司 | Method for processing and reading alternating current impedance data of lithium ion battery EIS and battery testing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114720526A (en) | 2022-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112240986B (en) | Evaluation method for lithium separation and uniformity of large-size soft-package lithium ion battery | |
| CN111736085A (en) | Lithium ion battery health state estimation method based on electrochemical impedance spectrum | |
| Zheng et al. | Fault identification and quantitative diagnosis method for series-connected lithium-ion battery packs based on capacity estimation | |
| CN113533988B (en) | Long-term circulation capacity attenuation analysis method for lithium ion battery | |
| CN111438077A (en) | Method for rapidly screening and detecting echelon utilization performance of retired ternary soft package battery | |
| CN115548482A (en) | Lithium supplementing method, battery preparation method and battery | |
| CN109164397B (en) | Lithium battery life loss assessment method considering charging rate and ambient temperature | |
| CN114094043A (en) | Method for evaluating cycle performance of lithium battery positive electrode material | |
| CN114497693A (en) | Preparation method of three-electrode battery and lithium precipitation testing method thereof | |
| CN114720526B (en) | Rapid evaluation method for cycle performance of lithium iron phosphate material | |
| CN116651773A (en) | Screening and reorganizing method for gradient utilization of power battery | |
| CN108680863B (en) | Method for measuring maximum charging current of lithium ion battery | |
| CN113759260B (en) | Quick judging method for capacity fading reason of high-capacity power battery | |
| CN115774200A (en) | Micro/internal short circuit detection method for lithium ion battery series module | |
| CN117169739A (en) | Evaluation method for internal resistance performance of lithium ion battery | |
| CN111208160B (en) | Method for evaluating cycle performance of ternary material | |
| CN113433027B (en) | Performance prediction method of lithium ion battery material | |
| CN114609521A (en) | Method for rapidly evaluating cycle performance of lithium iron phosphate battery negative electrode material | |
| CN113013470B (en) | Lithium ion power battery cell grouping method | |
| CN117723980A (en) | Method for rapidly evaluating system stability of lithium ion battery | |
| CN117664954A (en) | Method for rapidly evaluating cycle performance of lithium iron phosphate material | |
| CN117388727A (en) | Lithium ion battery self-discharge state rapid evaluation screening method | |
| CN114779090A (en) | Nickel-hydrogen battery cycle life prediction method | |
| CN117907834A (en) | Method for evaluating N/P ratio design lower limit of battery | |
| CN115079025A (en) | Method for estimating SOE (state of energy) of energy storage lithium iron phosphate battery |
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 |