Lithium battery common fault problem, causes of dynamic lithium batteries

　　Author ：Iflowpower – Portable Power Station Supplier

Lithium-ion battery FAQ problem, causes of power lithium ion batteries failure. With the rapid development of the scientific and technological level, the use and use of lithium-ion batteries have long been self-evident, but in our daily life, the problem of lithium-ion battery accidents is always endless, and sometimes us. As the source of the power of new energy vehicles, the dynamic lithium-ion battery failure is an important reason for the security.

The following small series to explain the common fault problem of lithium ion batteries, the cause of the power lithium-ion battery failure. Common failure of lithium ion batteries ● Palectification does not cause a low voltage: When the battery is detected, the electrical component is uneven due to contact resistance or detection cabinet charge current. In a short time storage, the measurement voltage is small, but the voltage difference between long-term storage is large, this low voltage has no quality problems, can be solved by charging.

Store over 24 hours after production charge. ● The temperature is abnormal: If the lithium-ion battery is charged or discharged, the temperature is abnormal, for example, the temperature is too high. The reason for this happens may be that there is a slight short circuit inside the lithium ion battery.

● The battery pack cycle life is short: the battery pack is terminated within the service life of the commitment, because the battery pack is particularly poor or the battery pack is particularly poor, so that the battery pack is charged when charging, discharge Can't finish. ● The battery is stopped in the battery pack: It may be that the lithium ion battery is electrically complete, and the minimum lower limit voltage of the protective plate or the controller stops; or the continuous operating current is too large to more than the design protection of the protection board. The current or controller's continuous current causes the protection plate or controller to stop working, which makes the battery pack suddenly stop working.

● Electrical core airbore drum, air leakage liquid has stimulating odor screws black, battery softened, precipitated hardening, overheating, 极. Overcharge. Causes of the dynamic lithium-ion battery failure 1, the battery voltage is high: after the full power is allowed, the battery is single or several string voltage is obviously high, and other monomers are normal.

Cause: 1 Collection error; 2LMU balance function difference or failure; 3 low battery capacity, rapid voltage is rapid. 2, the battery voltage is low: after the full power is standing, the battery is single or several monomer voltages is obviously low, and the other monomer is normal. Cause: 1 Collection error; 2LMU balance function difference or failure; 3 battery self-discharge rate; 4 battery capacity low, voltage drop in voltage.

3, high temperature: a alarm threshold in a certain or a few temperature points in the battery system, running or charging. Cause: 1 temperature sensor failure; 2LMU fault; 3 electrical connection abnormal local fever; 4 fan is not opened, heat dissipation; 5 close to the motor; 6 over charge. 4.

Reason for AC charging failure: 1 battery fault (voltage, temperature, insulation, etc.); 2BMU failure (charging module or charging CAN abnormal); 3 main negative, charging relay abnormal; 4cc pair resistance, CP pair of earth voltage Abnormal 5PE. 5, Current abnormal failure Cause: 1 Hall and its input and output circuit; 2 Hall reverse; 3 DC charging, if the BMS demand voltage or current is 0, the charger outputs the minimum output capability.

The above is the common fault problem of lithium ion batteries, the cause of the dynamic lithium-ion battery failure. Everyone pays more attention during normal use, and there is a problem to solve it in time.