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Author ：Iflowpower – Portable Power Station Supplier
In life, you may have touched a wide range of electronic products, then you may not understand some of its components, such as the lithium-ion battery that it may contain, then let Xiaobian lead everyone to learn lithium-ion batteries together repair. In general, the lithium-ion battery life has 300 to 500 charging cycles. After using a certain number of times, the capacity will be significantly reduced, and it will be repaired.
Lithium-ion batteries have high charge and discharge speed and energy density, and electric vehicles with lithium-ion batteries at this stage can be met to meet urban pending needs. Although there are many advantages, the safety issues of lithium-ion battery electric vehicles are also very concerned about one aspect. The following small series introduces lithium-ion battery repair technology and methods.
Lithium-ion battery repair technology parsing with the continuous improvement of electric vehicle performance and energy-saving environmental protection requirements, lithium-ion batteries have gradually replaced lead-acid batteries, but such batteries are not always available, even high-performance lithium-ion batteries are also being use. After the time is pressing, power performance and durability can not meet the needs, the only choice is to replace it. Commercial lithium-ion batteries often encounter certain faults during use or storage, including new internal resistance, low rate performance, gas emergence, liquid leakage, short circuit, deformation, thermal loss, lithium, etc.
, these are all Severe reduced performance, reliability and safety of lithium-ion batteries. The correct analysis and understanding of these faults is important to improve the performance and maintenance technology of lithium-ion batteries. Lithium ion batteries are most worry about excessive charging and excessive discharge, so the battery pack and external dual circuit must pass the circuit to limit the upper and lower working voltage of the battery.
A string of multi-cell batteries have high requirements, that is, a 18650 battery capacity, internal resistance, and discharge platform must be the same. From the perspective of science and technology applications, the development of new energy vehicles is more dependent on high-tech, which is also one of the important features of new energy vehicles. Its concrete performance is that new energy vehicles not only use unconventional energy as power fuel, but also leaders in high-tech development in the field of safety performance, this is the development direction of future automotive industries in the new energy.
Electric car lithium-ion battery How to repair? 1. First determine the working voltage of the lithium-ion battery, usually 48V or 24V. Then find the node of each battery pack to measure whether the voltage is normal.
Normally, the single pass voltage should be the same. If the voltage is different, it indicates that the battery pack may have problems. 2.
The failure of battery sulfurization can be maintained by repair tools. By measuring the battery state, the positive and negative frequency conversion particle wave is continuously transmitted during charging and discharging. After about 15 hours, the crystallization and hardening of the battery can be removed.
However, it should be noted that the method of repairing lithium-ion batteries in electric vehicles is usually only applicable to mild sulfurization. If the sulfur is serious, please replace the new battery. 3.
After the battery board is softened, the battery should be discharged to 10.5V after discharge, then discharge the lamp deep from 1 to 5 hours. Then use the activation tool to activate the repair.
In this way, it is very likely to repair the lithium-ion battery of the electric vehicle, but if the situation is serious, only new lithium ion batteries can be replaced. 4, multi-stringed multi-parallel method: generally add direct power supply on low voltage battery, or use the load table to connect the high voltage battery in series, reducing the voltage to reach. The effect of battery voltage balance; if the voltage difference is tens of millivolts, charging or discharge is not easy to carry.
If someone is protected, it will be easy to charge or charge. Obviously, this maintenance method is very inconvenient. The efficiency is also very low, you can't repair a few sets of lithium-ion batteries a day.
Due to the non-memory characteristics of the lithium ion battery, the battery pack should be periodically charged daily after each riding; if the lithium ion bicycle is placed two months, the battery pack should be charged; charging and The discharge cycle should be more than 5 months; when the lithium ion battery is not used, the power supply should be turned off, or the battery pack should be removed from the battery box because the electric motor and controller will still consume power in the no-load state.
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