Correct charging method of electric vehicle lead-acid battery

The most taboo thing about lead-acid batteries is to charge the battery when it is completely discharged. In this case, the battery life will be greatly reduced. 【Do not deep discharge multiple times. The so-called deep discharge refers to the undervoltage of electric vehicles. After power failure, undervoltage and power failure, it is absolutely impossible to continue driving with power on. The intermittent discharge of the electric vehicle battery is the most harmful to the battery. If the electric vehicle encounters an undervoltage and power failure during driving, it is best to get off the vehicle, turn off the electric door lock, and drive the cart. Hope to help you!

  1. Charge the battery when the power indicator shows one-third of the remaining power.
  2. The charging environment should be kept dry and tidy, and the charger should not be wrapped in plastic bags or plastic bottles, because it is easy to burn out when the charger cannot breathe.
  3. Try not to use fast charging, if not necessary, do not exceed twice in a month.
  4. The charger is placed in a fixed place, do not bump it, even if you carry it, you must fully consider the fault caused by bumps.
  5. Use the standard charger to charge.
  6. The ideal charging time is when 60%~80% of the battery’s power is consumed.
  7. Use and charge frequently.
  8. Lead-acid batteries have no regulations on the time and amount of charging for the first time, and can be charged and discharged at any time without causing memory of the plates.
  9. It should be noted that over-discharging and over-charging are absolutely prohibited. Over-charging is the process of forming a workshop, which will cause the metal layer of the grid to become thinner and easily break the grid. Over-discharging will cause the plate to vulcanize and the active sponge tissue to fail. To shorten the life of the plates, lead-acid batteries should pay attention to the specific gravity and liquid level of the electrolyte, and should not be short of liquid.
  10. When the lead-acid battery is used in the car, it is charging and discharging at any time. The meter of the battery on the old Jiefang truck is an ammeter with a pointer. You can see whether it is charging or discharging at any time, especially the headlights. When the high beam is fully turned on, the generator power supply is insufficient, and the generator speed is low when decelerating, which is to use part of the electricity in the battery, so charging and discharging will automatically switch dozens of times every night, no impact, no need to be like Ni-MH The battery must be fully charged. Also read:https://www.aimeno.com/lithium-battery-pack/195.html

The battery/battery is the power source of the electric bicycle, and it is also a kind of consumable, and the price is relatively high. Therefore, keeping the battery in good working condition and prolonging its service life is of great importance no matter from the perspective of environmental protection or economy. Practical value. The following are some maintenance methods of batteries:

1 Newly purchased electric vehicles should be fully charged before use. Because many electric vehicles have been left in stores for several months, or even more than half a year, they must be fully charged before use. It is best not to use them immediately after fully charged, but to stand for about ten minutes.

2 Take the battery down to charge. When installing, the battery should be firmly installed on the electric bicycle to prevent the battery from being damaged by vibration while riding. When the battery is being transported, it is forbidden to throw, roll over or press it heavily.

  1. Frequently remove the dust and dirt on the battery cover, and keep the battery dry and clean to prevent the battery from self-discharging.

4 Never let the battery be in a state of low power for a long time, and develop a good habit of charging the battery every night. Temporarily unnecessary, it should be fully charged, placed in a cool and dry place, and charged regularly (usually 10 days)

  1. When the electric bicycle is just started, use the pedals (you can push the ground with your feet if there are no pedals) to assist in starting. When going uphill, use the pedals to help the electric bike go uphill, so as not to damage the battery due to excessive discharge current.

6 When riding, be careful not to over-discharge the battery. After the battery is discharged to the cut-off voltage, continuing to discharge is called over-discharge. Over-discharge is likely to cause severe power loss of the battery, which greatly shortens its service life. Therefore, when using the battery, try to avoid deep discharge, and do shallow discharge and frequent charging. Generally, it is best to charge the battery once when the discharge depth is 50%.

Electric bicycles are generally equipped with an undervoltage protection function. When only one indicator light on the battery level indicator is on, the power should be turned off, use the pedals, and try to charge the battery as quickly as possible to avoid over-discharge of the battery.

When the battery is discharged to the cut-off voltage, the internal resistance is relatively large, and the concentration of the electrolyte is very thin, especially the inside and surface of the electrode plate are almost neutral. When the battery is over-discharged, the internal resistance tends to heat up, and the volume expands. When the discharge current is large, the heat is obvious. Even thermal deformation occurs. At this time, the concentration of lead sulfate is particularly high, and the possibility of short circuit of living dendrites increases. Moreover, lead sulfate will crystallize into larger particles at this time, that is, irreversible sulfation will be formed, which will further increase internal resistance and charge recovery. Poorly capable, even beyond repair.

The storage battery should be prevented from over-discharging when it is in use, and the effective measures of “undervoltage protection” should be taken. In addition, since the “undervoltage protection” of the electric vehicle is controlled by the controller, but some other equipment other than the controller, such as voltmeters, indicator lights and other power-consuming appliances, are directly powered by the battery, and their power supply is generally not controlled by the controller. Once the electric car lock switch is closed, it starts to use electricity. Although the current is small, over-discharge will occur if it is discharged for a long time for 1-2 weeks. Therefore, it is not allowed to unlock for a long time, and it should be turned off immediately when not in use.

  1. To prevent overcharging, stop charging when the charger shows that it is fully charged, not overnight or even a few days after charging. Overcharging will cause the active material of the plate to harden and fall off, and cause water loss and battery deformation. The battery runs in the high temperature season, and there is mainly the problem of overcharging. Therefore, in summer, the temperature of the battery should be lowered as much as possible to ensure good heat dissipation, prevent charging after being exposed to the hot sun, and keep it away from heat sources.

To prevent overcharging, in addition, the parameters of the charger should be well matched with the battery, and it is necessary to fully understand the operating conditions of the battery in high temperature seasons and the changes during the entire service life. Do not place the battery in an overheated environment during use, especially keep it away from heat sources when charging. After the battery is heated, cooling measures should be taken, and charging can only be carried out when the temperature of the battery returns to normal. The installation position of the battery should ensure good heat dissipation as much as possible. If overheating is found, charging should be stopped, and the charger and battery should be checked. When the discharge depth of the battery is shallow or the ambient temperature is high, the charging time should be shortened.

  1. Prevent temporary loss of electricity, which will vulcanize the plates. Under low temperature conditions, charging mainly has the problems of poor charging acceptance and insufficient charging causing battery power loss. Heat preservation and antifreeze measures should be taken at low temperature, especially when charging, it should be placed in a warm environment, which is conducive to ensuring sufficient power, preventing irreversible sulfation, and prolonging the service life of the battery.Also read:https://www.aminobattery.com/lithium-battery/202.html

9 To prevent short circuit, special care should be taken when installing or using. The tools used should be insulated. When connecting the wires, the electrical appliances other than the battery should be connected first. After checking that there is no short circuit, finally connect the battery. Cracks under pressure. It is forbidden to use the method of short-circuiting the battery to detect the electrification of the battery, so as to prevent the explosion and cause casualties

When the battery is in a short-circuit state, its short-circuit current can reach hundreds of amperes. The tighter the short-circuit contact, the greater the short-circuit current. Therefore, a lot of heat will be generated in all connected parts, and the heat generated by the thinner link will be greater, which will fuse the connection and cause a short circuit. Explosive gas may be generated locally in the battery or accumulated during charging. Sparks will be generated when the connection is fused, which will cause the battery to explode; if the short-circuit time of the battery is short or the current is not particularly large, the connection may not be fused. , but there will still be overheating in the short circuit, which will damage the adhesive around the connecting strip, leaving hidden dangers such as leakage. Therefore, the storage battery must not be short-circuited, and special care should be taken when installing or using it. The tools used should be insulated. When connecting the wires, the electrical appliances other than the battery should be connected first. Good insulation to prevent rupture caused by overlapping pressure.

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