How to use the electric car battery to maintain the best and most reasonable?

How to use the electric car battery to maintain the best and most reasonable? 1. Why does the battery need to be recharged before it is used for the first time?

The battery is the heart of an electric vehicle. The maintenance of the battery directly affects the riding of the electric vehicle. How to maintain the electric vehicle battery can make the electric vehicle ride better.

A: After the battery is shipped from the factory to the use, generally after 1-2 months, or even longer, the battery during storage due to the battery's internal self-discharge spontaneous reaction, the consumption of a part of the electricity, can not reach the rated capacity value, so the first time Before use, it is best to make additional charge so as not to mistake the customer for lack of capacity.

2. How to handle the battery if it is stored for a long time?

Answer: First, the battery should be stored fully charged, and should be charged at least once a month to prevent loss of electricity, can effectively prevent the generation of crystal technology caused by irreversible salinization and crystal branches short circuit.

3、 Do you want to discharge the battery before charging?

A: The lead-acid battery is different from other secondary batteries. It has no memory effect. Therefore, no matter what kind of state of charge the battery is in, it can be directly charged without discharging.

4、Does the battery charge well or is it fully discharged?

Answer: Since the discharge is deeper and shallower, the number of cycles will be greatly increased. Therefore, according to this theory, the ground charging is beneficial to the cycle life, but there are many defects such as high failure rate, poor reliability, and low accuracy due to the influence of the price factor technology level on the chargers currently circulating in the market. Therefore, sometimes the ground charge affects the battery life. When the battery is vented and recharged, although the number of charging times is reduced, discharge may cause some single cells to be overdischarged due to the difference between the single cells. The charging acceptance capability will be greatly reduced, resulting in insufficient charging, and due to the discharge of electricity. Charging, the charger is overloaded for a long time, and it is easy to damage the charger. In summary, we charge the battery when the battery discharges 50-70% of its power.

5. What are the harms of overcharging and undercharging?

A: The overcharge is the battery charging current is greater than the battery acceptable current, overcharge is mainly the production of electrolytic water side reactions, due to the positive oxygen generated by the battery transfer to the negative oxygen composite reaction, the occurrence of heat, so the actual overheating into heat The battery temperature rises without control, causing a large amount of water loss, and severely deformed and other failures. Undercharge is generally said to be insufficiently charged and not fully charged. The pole will gradually form a thick and hard lead sulfate. It will be almost insoluble, ie, it will produce "irreversible sulfation" and it cannot be charged by ordinary methods. , so the capacity will quickly decay once and for all.

6. Do electric refueling batteries require rehydration when used?

Answer: Under normal circumstances no rehydration is required. Since the lead-acid sealed battery for electric bicycles is a valve-regulated sealed battery, oxygen composite reaction occurs during normal use, so that the water consumption is extremely low, and no additional electrolyte is needed during normal life. water. However, due to the use of environmental conditions and the impact of charging may have some battery water loss is large, or even dry phenomenon occurs, at this time should deal with its additional electrolyte or pure water, add electrolyte density 1.05g/cm dilute sulfuric acid Or pure water, so that the more serious loss of battery back to normal. After rehydration, excess free fluid should also be withdrawn.

7. Under what circumstances should an electric car battery be maintained and charged?

A: 1, the battery capacity decay deceleration too fast; 2, there is a backward battery; 3, the battery fluid loss, rehydration; 4, after a long time after the battery is placed; 5, the battery after a serious over-discharge; 6, the battery is in a long time Low-temperature environment work;

8. What is the relationship between the initial capacity of the battery and its service life?

A: The battery capacity is affected by the active substances and the utilization rate. Electric bicycle batteries have a certain size, and the quality of the plates has been limited to a certain degree. Only by increasing the utilization of active substances can the capacity be increased. To increase the battery capacity, the porosity must be increased and the PbO2 content and the sulfuric acid specific gravity must be increased. However, these measures will accelerate the softening of the positive electrode plate, resulting in an accelerated decay of the battery life. During the charging and discharging process, the active material will expand and contract (especially the positive electrode plate). The deeper the depth of discharge, the greater the amount of expansion and contraction of the active material will accelerate the softening of the active material. Therefore, when the initial capacity is too large, the battery charge and discharge times are directly affected.

9. Is the battery voltage high in capacity?

A: The battery voltage and capacity are two concepts. The voltage is related to the electrode material and the electrolyte concentration. The battery capacity is the amount of active material released by the electrochemical reaction and the current, the reaction conditions and the use of each active material. Rate, connection and so on, so the high voltage can not say that the capacity is high, the voltage is not low and the capacity is low.

10. What is the effect of temperature on battery performance?

A: When the battery is charged and discharged, an electrochemical reaction occurs on the battery electrode. The higher the temperature, the higher the activity of each active material of the battery, the lower the viscosity of the electrolyte, and the lowering of the resistance, so the electrochemical reaction is easy to proceed. The lower the discharge temperature is, the lower the discharge capacity is. At a particularly low temperature, the discharge capacity will be greatly reduced, and the temperature will be higher. On the contrary, the lower the charge temperature, the lower the charge acceptance capacity, and the higher the charge voltage is required to be sufficient. Electricity. On the contrary, the higher the temperature is, the better the charge acceptance ability is, and it is easy to cause over-charging. Therefore, it is required to reduce the charging voltage so as not to cause overcharging.

11. Is the number of electric vehicle battery cycles certain?

Answer: According to different depths of discharge, the difference is very large. The deeper the depth of discharge, the smaller the number of cycles, the shallower the depth of discharge, the greater the number of cycles. Contact the following table according to the depth of discharge of the test and the number of cycles:

Discharge depth 100% 70% 50% 20% 10%

Cycle times 350 times 550 times 1000 times 2800 times 7000 times

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