Causes of inconsistency for electric vehicles retired lithium battery

　　Author ：Iflowpower – Portable Power Station Supplier

Reasons for inconsistencies of electric vehicles retired lithium ion battery. Electric vehicles are a new energy vehicle that is exhibiting more and more advantages. With the promotion of tram cars and the decommissioning of a large amount of power lithium-ion battery, the accumulation effect of its health, environment, and safety hazard is superplified.

Specific expressive expressions of lithium-ion battery inconsistency, battery sorting problems and inconsistent retired batteries are involved in the series of characteristics after the string, and the problem must be studied before retiring the lithium-ion battery. The inconsistency of electric vehicles retired lithium-ion batteries is from the lithium-ion battery that is retired in the electric vehicle, there is a large inconsistency problem. This is the following: 1 The following points: 1 The inconsistency of electric vehicle lithium-ion battery factory performance, the unevenness of the raw materials and the difference in manufacturing process result in the inconsistency problem of the battery, which is an objective appearance.

2 The environment in which lithium-ion batteries are exported, such as different ambient temperatures, degree of self-discharge, air humidity, ventilation conditions, etc., will cause inconsistency problems. 3 further exacerbate the inconsistency of lithium ion batteries in use, the maximum effective capacity of the battery pack is usually determined by the battery with a minimum effective capacity.

Since it is in a long time to overcharge, the aging speed will accelerate, form a vicious circle, resulting in inconsistent lithium-ion battery packs Sexual expansion trend. 4 Different external use environments will deepen their inconsistency differences, the arrangement of each module in the lithium-ion battery pack, temperature and humidity, heat dissipation conditions, charge and discharge power, etc., there are some unalapsed differences, and to some extent increase the battery.

Group inconsistency. Since the environment in which the power lithium-ion battery is in service is more complicated, the performance of the lithium ion battery is different from the degree of performance attenuation, thereby adding the inconsistency between the battery. Therefore, if you want to reuse the retired power lithium battery, it is necessary to study the performance of the retired power lithium battery, evaluate the consistency between the batteries, and screened and grouped to maximize the retirement under the premise of safety.

Residual capacity of lithium ion battery. The inconsistency of electric vehicles retired lithium-ion batteries is the largest factor that restricts its reuse, including positive state (SOC), battery internal resistance, battery capacity, open circuit voltage and operating voltage, discharge platform time, magnification performance, self-discharge Influencing factors, charge and discharge efficiency, and cycle life. In general, the reuse process of the elimination battery is usually the failure processing, external structure disassembly, battery cell detection, screening classification, and then carry out the tradder.

This process can reduce a certain degree of inconsistency, but this reduction is still limited. Electric vehicles are a new energy vehicle that is exhibiting more and more advantages. With the promotion of tram cars and the decommissioning of a large amount of power lithium-ion battery, the accumulation effect of its health, environment, and safety hazard is superplified.

In the face of increasingly pressing electric vehicle power lithium-ion batteries, how to dispose of a gradual scale retired dynamic lithium battery, will be a major topic affecting the development of new energy vehicles. Summary: With the advancement and economic improvement of the secondary use of retired lithium-ion batteries, the secondary use of lithium-ion batteries will develop rapidly, thereby making full use of all the value of the lithium-ion battery. If the waste-based dynamic lithium battery ladder is improved, the economic cost declines, in the field of ladder, the full life cycle of the power lithium-ion battery will be fully utilized.

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