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Accelerated testing method of long-life quick charge type lithium iron phosphate battery

A technology of lithium iron phosphate battery and testing method, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of taking a long time, restricting the update cycle of technology development, and the long cycle of battery research and development and evaluation. The effect of shortening and shortening the test time

Inactive Publication Date: 2018-05-18
TAIYUAN UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0002] Lithium iron phosphate battery is one of the most widely used batteries at present, and has become one of the main commercial development directions in the battery system. The direction of development, but the current test technology for long-life fast-charging lithium iron phosphate batteries is not mature enough, there are some problems
For example: the traditional battery testing method will take a lot of time, making the battery research and development and evaluation cycle extremely long, seriously restricting the technology development update cycle

Method used

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  • Accelerated testing method of long-life quick charge type lithium iron phosphate battery
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  • Accelerated testing method of long-life quick charge type lithium iron phosphate battery

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Embodiment

[0023] Taking a 20Ah long-life fast-charge lithium iron phosphate battery as an example, the implementation process of the present invention is described.

[0024] Step 1: Leave the battery to be tested at a temperature of 23°C-27°C for 4 hours;

[0025] Step 2: With the rated power of the battery to be tested, charge it at constant power to the end-of-charge voltage of the battery, and let it stand for 30 minutes;

[0026] Step 3: With the rated power of the battery to be tested, discharge it at constant power to the end-of-discharge voltage of the battery, and let it stand for 30 minutes;

[0027] Step 4: The charging and discharging cycle starts, the number of cycles is N, and initially, N=0;

[0028] Step 5: With 3 times the rated power of the battery to be tested, charge it at constant power to the end-of-charge voltage of the battery, and let it stand for 30 minutes;

[0029] Step 6: With 3 times the rated power of the battery to be tested, discharge at constant power ...

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Abstract

The invention relates to an accelerated testing method of a lithium iron phosphate battery. The accelerated testing method of a lithium iron phosphate battery includes the following steps: laying thebattery at the temperature of 23 DEG C-27DEG C for h hours; at the rated power, charging the battery at the constant power to the charge termination voltage of the battery, and then standing for m minutes; at the rated power, discharging the battery at the constant power to the discharge termination voltage of the battery, and then standing for m minutes; starting circulation, wherein the circulation time N=0; at t times of the rated power, charging the battery at the constant power to the charge termination voltage of the battery, and then standing for m minutes; and at times of the rated power, discharging the battery at the constant power to the discharge termination voltage of the battery, and standing for m minutes, wherein the circulation time N = N+1, and determining whether the circulation time N is integral multiples of 100 and the charging energy conservation rate RCKi and the discharge energy conservation rate RDKi has any one item being less than r, if so, circulation is over, and if not, circulation continues. The accelerated testing method of a lithium iron phosphate battery can greatly reduce the testing time on the premise of guaranteeing effectiveness of the test.

Description

Technical field: [0001] The invention relates to the test of battery electrical performance, in particular to an accelerated test method of lithium iron phosphate battery. Background technique: [0002] Lithium iron phosphate battery is one of the most widely used batteries at present, and has become one of the main commercial development directions in the battery system. However, the current test technology for long-life fast-charge lithium iron phosphate batteries is not mature enough, and there are some problems. For example, the traditional battery testing method will take a lot of time, making the battery research and development and evaluation cycle extremely long, which seriously restricts the technology development and update cycle. Therefore, it is urgent to propose an accelerated test method for an efficient long-life fast-charge lithium iron phosphate battery. Invention content: [0003] The purpose of the present invention is to propose a test method for a lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 陈泽华柴晶赵哲峰刘晓峰刘帆李伟
Owner TAIYUAN UNIV OF TECH
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