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release time:2022-10-11
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1. The lithium battery pack cannot be charged
The lithium-ion battery packs found in pure electric vehicles cannot be recharged while being charged. The reasons can be divided into: charging head connection error or common charging head fault; Rain screen maintenance or lithium battery protection board is invalid; The lithium battery is short-circuited inside the high-power electric appliance
After solving the safety hazards, check successively: whether the charging head is incorrectly connected, whether the positive and negative power plugs of the lithium battery pack are incorrectly connected; Eliminate the maintenance of lithium battery protection board of household appliances, restart the MOS tube, and accurately measure whether the MOS tube has driver operating voltage; Check whether the cable connection is disconnected
2, lithium battery can not discharge
The lithium battery pack of pure electric vehicle cannot be normally charged and discharged during use. The reasons are as follows: low working voltage of lithium battery pack, maintenance of rain cover or control panel; Damage to the rain cover or control panel; Positive and negative stage charge and discharge connection error; The cable is disconnected or the power switch is not turned on
In view of the poor condition, countermeasures such as charging lithium battery pack, finding heat shield or wiring connection can be taken
3. The lithium battery is not fully charged
When pure electric vehicle lithium battery pack is applied to the circulation system, when the battery is disconnected from all working voltages and battery charging terminates, the lithium battery pack cannot be charged. This is because the single string power consumption or volume of the lithium battery pack is not consistent. Power consumption or small first charge, and then use the lithium battery protection board for maintenance, so that the whole process of battery charging can be terminated before the other string charging battery is full
In this case, a balanced charging head can be used to charge the lithium battery pack to keep the operating voltage of each string consistent. If the volume is very different, be sure to replace it with a very different rechargeable battery. However, the key is to check the volume of lithium battery and match the capacity division after the assembly of lithium battery, otherwise it will be inconvenient to disassemble in series
4. Short battery life
The lithium-ion battery packs in pure electric vehicles rapidly release current when used. The reasons are: the rechargeable battery is not fully charged; The working voltage and volume of a single string vary greatly. The lithium battery string is short circuit fault or the self-discharging flow of the lithium battery string is too large. As a result, the power consumption of the lithium battery string is exhausted shortly after refueling. For the above defective rechargeable batteries, lithium batteries can be recharged or replaced
5, lithium battery voltage is not stable
The lithium battery pack of pure electric vehicle is composed of multiple lithium batteries in series and parallel, and the consistency of lithium batteries is very high. Although the manufacturer of lithium battery pack has matched lithium battery, due to the error of rechargeable battery, in the whole process of long-term use of lithium battery pack, the operating voltage of each series of rechargeable battery will be inconsistent, resulting in the reduction of the whole set of kinetic energy output of lithium battery pack. Then there will be a sudden shutdown of power in the application, progress drops sharply, charging is not satisfied, the battery can not be charged and other problems.
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