CR2412 battery on button type lithium battery group inconsistency problem
Regarding the inconsistency problem of button lithium batteries, the inconsistency of a lithium ion battery will affect the battery life and reduce the performance of the battery pack
Regarding the inconsistency problem of button lithium batteries, the inconsistency of a lithium ion battery will affect the battery life and reduce the performance of the battery pack. Refers to the inconsistency of lithium battery capacity, voltage, resistance, self-discharge rate and other parameters are different, battery pack, service conditions, environment, different battery management combination structure caused by.
Lithium battery technology enterprise development to control the management cost, improve the energy density and power density of lithium battery, enhance the use of network security, extend the service life and improve group consistency as the main axis, these basic elements to improve their own lithium battery is the biggest challenge we are facing. The inconsistency of single battery is an important social factor affecting the performance of battery pack, which can effectively reduce the available capacity of battery pack and reduce the cycle economy life of battery pack.
After assembling a single battery, the cycle life will be reduced. As for the inconsistency of lithium battery groups, choosing single batteries with long service life to form battery packs will increase the number of battery cycles. However, in order to improve the overall performance of battery packs and obtain a longer service life, attention should also be paid to the matching consistency of single batteries. Based on the analysis of the causes of the inconsistency of lithium ion battery pack, the improvement measures and optimization methods are put forward.
The state difference of single cells mainly includes initial state difference and parameter difference during use. In the design, manufacture, storage and use of battery, there are many uncontrollable factors, which affect the consistency of battery. Improving the consistency of single cell battery is the premise of improving the performance of battery pack. Single cell parameters affect each other, current parameters are affected by the initial state and time accumulation.
The self-discharge rate of the discharge depth of each battery is inconsistent with the battery capacity, voltage and battery capacity of the battery pack. Small capacity, poor battery performance to reach full charging state in advance, resulting in large capacity, good performance, can not fully charge the battery state. Inconsistent battery voltages will result in a parallel battery charging cell interaction, higher voltage of the battery and lower charge of the battery will be charged, accelerating the attenuation of battery performance and energy loss of the entire battery pack. When the self-discharge rate of a large battery capacity is lost, the inconsistency of the self-discharge rate will lead to the charging state of the battery, and the difference voltage will affect the performance of the battery pack.