Common faults and avoidance methods of lithium batteries for electric vehicles

From the invention of the bicycle to the installation of an engine on the structure of the bicycle, it gradually evolved into a motorcycle. With the development of battery technology, the first electric bicycle was launched in 1992. In the past two years, the lithium battery industry has risen. The industry has also developed. After replacing bulky lead-acid batteries, electric bicycles with lithium batteries can be made cheaper, lighter and smaller. As one of the main components of electric bicycles, the cost of lithium batteries occupies at least one-third of the entire vehicle, and some vehicles can reach one-half. Therefore, the safety and quality problems and failure phenomena of lithium batteries have also received a lot of attention. The failures of lithium batteries in electric vehicles are generally caused by the following reasons: overcharging, overdischarging, high current fast charging, unbalanced battery quality problems, and the environment Factors lead to. Therefore, it is necessary to pay attention to maintenance when using lithium battery electric bicycles. The fault phenomenon of the lithium battery of electric vehicles 1. The lithium battery pack cannot be charged 1) The charging is completely unresponsive. When the lithium battery cannot be charged, please do not force the lithium battery to be charged. Under normal circumstances, the protection board of the lithium battery will The charging circuit is automatically turned on when the charger is connected. If it cannot be charged, a detailed inspection of the lithium battery is required, which is usually caused by the protection board. 2) There is a response to charging, but it is fully charged quickly, but it cannot be used normally, or is quickly out of power. This phenomenon is generally caused by the imbalance of the lithium battery cell part and the failure of a certain string of batteries. In this case, the power supply must be disconnected immediately and sent for inspection. 2. When the lithium battery pack cannot be discharged in a normal state, the lithium battery can be overcharged and reconnected to the discharging state of the protection board. If it does not work, you can try to charge the lithium battery and then use it again. If you still can't solve it, please check whether the positive and negative poles are correct. 3. Lithium battery cannot be fully charged. When the normal lithium battery cannot be fully charged, eliminate the fault of the charger, and it may be caused by the unbalanced battery. The final result will cause the entire set of batteries to fail and be unable to charge. Need to be repaired in time. 4. Short battery life. The battery life of a normal-use lithium battery suddenly becomes shorter. For example, it can travel 60 kilometers, but suddenly it can only run 40 kilometers at a time. If this happens, first check whether the lithium battery has any traces of bumps. This fast battery life The phenomenon of shortening will become more and more serious. It is also because the failure of a certain battery cell in a single string of the battery cell may induce this situation. During the inspection, it is also necessary to test the equalization function of the lithium battery protection board. V. Environmental conditions and the impact of temperature on lithium batteries. Lithium batteries for electric vehicles usually have a certain degree of water resistance, but they are not sealed. Therefore, lithium batteries for electric vehicles should not be stored in an excessively humid environment for a long time. Too low temperature will lead to a decrease in the capacity of the lithium battery of electric vehicles. Normally, in winter, the battery life of electric bicycles will be greatly shortened. How to use the lithium battery of an electric vehicle correctly 1. Do not recharge the lithium battery after exhaustion, and charge the lithium battery when the battery is insufficient. 2. Lithium battery can be charged under any circumstances, it does not have any memory function. 3. When not in use for a long time, keep the battery at 30% power, and check the lithium battery once in about 3 months, and recharge the lithium battery when it is found to be seriously insufficient in time. Summary: Electric vehicle lithium battery is an important and relatively expensive component of electric vehicle. Paying attention to maintenance at ordinary times can also make lithium battery safer and more stable. Do not make up for problems when problems occur. Lithium battery failures are usually irreparable. And a serious failure can also cause the fire and explosion of the lithium battery. It is very important to develop a good habit of using electric vehicles. 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: What is the impact of the internal resistance of the lithium battery on the battery?