What are the common problems in the use of lithium-ion batteries for electric vehicles?

1. Lithium-ion battery cannot be charged. The lithium-ion battery of an electric vehicle cannot be charged. There are several reasons: the charger is connected reversely or the charger is faulty; the protection board protection is not restored or the protection board fails; the battery pack and the electrical appliance are short-circuited externally. When solving the above problems, check in order: whether the charger is connected reversely, whether the positive and negative plugs of the battery pack are connected reversely; re-enable the appliance to release the protection of the protection board, measure whether the protection board MOS tube has a driving voltage; check whether the wiring connection is loose or disconnected. 2. Lithium-ion battery cannot be discharged. Lithium-ion battery of electric vehicle cannot be discharged normally. There are several reasons: low voltage of lithium-ion battery, protection board protection or controller protection; protection board or controller damage; discharge positive and negative poles are reversed ; The line is disconnected or the switch is not turned on. When solving the above problems, it can be solved by charging the lithium-ion battery, searching for the protection board or the line connection problem. 3. Lithium-ion batteries are not fully charged. In the process of recycling lithium-ion batteries for electric vehicles, charging stops before the cut-off voltage of the lithium-ion batteries is reached during charging. This situation is due to the inconsistent power or capacity of a single string of lithium-ion batteries. The battery with high power or low capacity is fully charged first. The protection board protects the battery and stops the charging process if the battery of other strings is not fully charged. In this case, the equalization charger can be used to recharge the lithium-ion battery to keep the voltage of each string consistent. If the capacity difference is large, the battery with the large difference must be replaced. But the most important thing is that the battery cells must be tested and matched before packaging, otherwise it will be troublesome to re-disassemble a single string out of date. Fourth, the battery life is short. The use time of lithium-ion batteries in electric vehicles is very short. The reasons for this situation are: the battery is not fully charged; the voltage capacity of a single string varies greatly; the battery pack is short-circuited or the lithium-ion battery is self-discharged, causing the battery pack to become rigid. The battery is used up when it is fully charged. To solve the above problems, recharge the lithium-ion battery or replace bad batteries. V. Inconsistent voltages of lithium-ion batteries. Lithium-ion batteries for electric vehicles are composed of multiple batteries in series and in parallel. The requirements for the consistency of the batteries are very high. Although the lithium-ion battery processing manufacturers have done the pairing of batteries, However, during long-term use of lithium-ion battery packs, the voltage of each string of batteries will be inconsistent due to battery errors, resulting in a decrease in the output energy of the entire battery pack, and sudden power failure, sudden stroke reduction, and charging during use. Dissatisfaction with the power, the problem of not being able to discharge the power. 6. Ambient temperature Lithium-ion batteries have very high requirements on the use environment. Too high or too low temperature will enhance the self-discharge rate of lithium-ion batteries, especially high temperature will greatly shorten the service life of the battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What is the reason for the shortening of battery life due to deep discharge