Power battery voltage class defect treatment

Source: 2020 - 03 - 28 15:09 hits: 1. The defects of voltage is 1. High battery voltage: when the battery charge and are in a stationary state, battery voltage is definitely one or several of the strings, and other monomers to normal. Defect reasons: 1) Acquisition fault; LMU balance function is poor or ineffective; When the battery capacity is low, charge voltage rise quickly. Treatment: ( 1) Monomer voltage value is higher than other monomer, monomer voltage measurement practice, if the practical value is lower than the value of appearance, and voltage is the same with other monomers, then the practical values as the standard for LMU monomer voltage calibration; If the measured value is consistent with the display value, then the single battery discharge balance. Check whether there is voltage sampling line crack, virtual; Replace the LMU. 2, low battery voltage, the battery is full of static electricity, battery monomer or more voltage obviously low, other monomer is normal. Defect reasons: 1) Acquisition fault; LMU balance function is poor or ineffective; The battery self-discharge rate; When battery capacity is low, discharge voltage drops rapidly. Processing method: 1) Monomer voltage value is lower than other appearance, measuring unit practice comparing voltage value, if the practical value higher than the appearance of value, and the same as the other monomer voltage, on the basis of practical value for LMU monomer voltage calibration; If the measured value is consistent with the display value, the balance of artificial recharge to the single battery. Check whether there is voltage sampling line crack, virtual; Replace the LMU. Replace defective batteries. 3. Differential pressure, dynamic pressure differential/static pressure difference. When charging, the monomer voltage activated until full voltage voltage jump the gun; When pressed the accelerator, monomer voltage is more active than other series. When applying the brake, monomer voltage is greater than the growth of other series. ( 1) Connect the battery copper fastening nut loose; ( 2) Connect the surface dirt; The battery self-discharge rate; ( 4) Battery welding connection bronze welding ( Form low monomer ability list) ; Leakage of single cells. Processing method: 1) Tighten nut; ( 2) Remove foreign bodies on the surface of the connection. A single battery charge and discharge balance; There is something wrong with the replacement of the battery pack. 4. Charging voltage jump: vehicle or a single voltage jump. ( 1) Voltage acquisition loose line connection point; ( 2) The defects of brightness. Treatment: ( 1) Tighten the joint; Replace the LMU.