Retired lithium battery sorting method and system thereof
A lithium battery, sorting technology, used in sorting and other directions
Inactive Publication Date: 2018-10-12
重庆雅讯科技有限公司 +1
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Problems solved by technology
[0004] This application provides a sorting method and system for decommissioned lithium batteries to solve the technical problem of effectively and quickly sorting decommissioned power lithium batteries, and create conditions for its cascade utilization and reasonable recovery
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[0027] A sorting method for decommissioned lithium batteries, such as figure 1 shown, including the following steps:
[0028] S1: Measure the open circuit voltage V of the single battery ocv ;
[0029] S2: Determine the open circuit voltage V ocv Is it lower than the open circuit voltage lower limit V l , if yes, the single battery is scrapped, otherwise, go to step S3;
[0030] S3: The single battery enters the charging stage, and the charging current is I c , the charging time is T c ;
[0031] S4: Measure and calculate T c The terminal voltage V of the cell at time cr ;
[0032] S5: Judgment T c The terminal voltage V of the cell at time cr Does it exceed T c Time terminal voltage upper limit V crh , or if below T c Time terminal voltage lower limit V crl , if yes, the single battery is scrapped, otherwise, go to step S6;
[0033] S6: Enter the static stage, the static time is T s ;
[0034] S7: Measure the static voltage from the static stage 0 to the sta...
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The invention provides an ex-service lithium battery sorting method. The ex-service lithium battery sorting method comprises the following steps that the open-circuit voltage Vocv of a single battery is measured; when the open-circuit voltage Vocv is not lower than the open-circuit voltage lower limit Vl, a charging stage is executed; the terminal voltage Vcr of the single battery at the charging time moment Tc is measured and calculated; when the terminal voltage Vcr of the single battery at the charging time moment Tc does not exceed the end voltage upper limit Vcrh at the moment Tc and is not lower than the end voltage lower limit Vcrl at the moment Tc, a standing stage is executed; the standing voltage change Vcd of the standing voltage from the standing stage moment 0 to the standing stage moment Ts is measured; when the standing voltage change Vcd does not exceed the standing voltage change upper limit Vcdh, a discharging stage is executed; the voltage change Vdd of the voltage from the discharging stage moment 0 to the discharging stage moment Td is measured and calculated; and comprehensive calculating and grading are carried out, and classification is carried out according to the grading result. The ex-service lithium battery sorting method has the beneficial effects that ex-service power lithium batteries can be fast and effectively sorted, and conditions are created for gradient utilization and reasonable recycling of the ex-service power lithium batteries.
Description
technical field [0001] The invention relates to the technical field of new energy power lithium batteries, in particular to a sorting method and system for decommissioned lithium batteries. Background technique [0002] As a green battery, lithium-ion power battery has the advantages of high energy density, high working voltage, high safety performance and long service life. It shows excellent prospects in new energy storage such as portable electronic devices and electric vehicles. With the industrialization of electric vehicles, the output of power lithium batteries has also increased significantly. The service life of power lithium batteries is about 20 years, but after 3-5 years of use, the performance of power lithium batteries will decay. Once the battery capacity decays below 80% of the initial capacity, the cruising range of the electric vehicle will be significantly reduced. Therefore, in general, in order to ensure the safety and performance of the vehicle, electri...
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IPC IPC(8): B07C5/344
CPCB07C5/344
Inventor 李锐余佳玲何俊强刘小丽
Owner 重庆雅讯科技有限公司