Electric vehicle battery maintenance method

How to maintain electric vehicle battery

1. Battery and charger

A good battery with a good charger to play a good performance.

2. Matters needing attention in use

(1) when riding on a bridge, climbing a slope, against the wind or with a person, ride by hand. This avoids the impact of large current on the battery and increases the range.

(2) when the electric vehicle is just starting, it shall be ridden by human power first, and then driven by electricity after it has a certain speed. In this way, the impact of large current on battery, motor and driver can be avoided to increase the range and prolong the service life.

3. Charging method

(1) when the electric quantity is found to be less than 30%, it shall be charged in time. Long-term deep discharge (cycling to forced power failure of the system) or too shallow discharge (cycling only 1-2km) will affect battery performance. Charge the battery when 70% of the battery power is used up, and the battery performance is the best.

(2) it is better to charge the battery in a cool, ventilated and dry place. Direct sunlight or rain can adversely affect the performance of batteries and chargers. Keep the battery and charger away from other heating sources when charging.

(3) when the battery is used up, it should be fully charged in time, and the green light of the charger means it is fully charged. The battery performance will be affected if the battery is not fully charged or stored for a long time, especially if the battery is used for 3 hours after the green light.

(4) connect the battery end before charging, and then plug into the power supply. After charging, unplug the power supply and then put the battery end. If you do not follow the steps, it will cause ignition when connecting the battery end. Could cause a hydrogen explosion in the power box. In addition, after charging the charger must be disconnected from the power supply.

4. Battery maintenance (proper battery maintenance can extend battery life)

(1) every two months or so, when possible, consumers will do a deep discharge. Method: consumers ride to forced power off, turn off the power, ride home by hand, and then fully charge the battery (the charger turns green for 3 hours). Deep discharge 2 months can be done once, too often but the effect is not good.

(2) if the battery does not need to be fully charged for a long time, it should be stored and replenished regularly. In the process of battery storage, due to the power consumption, the power will gradually reduce, if not timely replenishment will affect the performance of the battery. It is recommended to supplement the electricity supply every three months

5. Why is the range of my electric car getting shorter and shorter

A. causes of the temperature drop

(1) battery temperature effect -- the colder the weather is, the lower the battery capacity will be. (example: when the battery capacity is only 85% at zero, the chemical reaction will take place during the charging and discharging process. When the weather warms up after winter, battery life will improve. This is a normal phenomenon.

(2) influence of vehicle efficiency -- the colder the weather is, the lower the vehicle efficiency will be. The conversion efficiency of motor and transmission mechanism is affected by ambient temperature. This is a normal phenomenon.

(example: clothing increases by about 10KG at zero degrees Celsius) (the colder the weather is, the more clothes consumers wear, the heavier the load on the whole car and the more power they consume.) This is an inevitable phenomenon.

B. cause of battery aging

C. causes of improper charging and discharging: improper charging and discharging will make the battery age faster.

D. cause of excessive load: excessive load will increase the power consumption and reduce the range.

E. Reasons for insufficient tire pressure: if the tire pressure is insufficient, it will increase the forward resistance of the electric vehicle, waste the limited electric energy and reduce the range.

Battery maintenance method

1. Do not change the charger casually and do not remove the speed limit of the controller

The charger of each manufacturer has personalized demand commonly, do not change charger at will when not sure. If the mileage requirement is long and multiple chargers are required for off-site charging, the charger that is fully charged during the day shall be a supplementary charger and the original charger shall be used at night. Removing the speed limit from the controller, while increasing the speed of some cars, will reduce not only the safety of the car, but also the battery life.

2. Protect the charger

The general operating instructions have instructions for protecting the charger. Many users do not read the manual habit, often think of the problem after looking for the manual, often too late, so it is very necessary to read the manual. In order to reduce the cost, the current charger is basically not done high vibration design, so that the charger is generally not placed in the trunk of the electric bicycle and the basket. In special cases, they must be moved and packed in styrofoam to prevent vibration. Many chargers after vibration, its internal potentiometer will drift, so that the whole parameter drift, leading to abnormal charging state. In addition, it is necessary to keep the charger ventilated when charging, otherwise it will not only affect the life of the charger, but also affect the charging state due to thermal drift. This will damage the battery. Therefore, it is very important to protect the charger.

Recharge every day

Even if your endurance is not long, you can use it for 2 to 3 days with a single charge, but you are still recommended to charge it every day, so that the battery will be in a shallow cycle, and the battery life will be extended. Some early adopters of mobile phones thought that the best way to charge a battery was to wait until it was almost finished. Frequent discharge has a significant impact on battery life. Most chargers charge 97 to 99 percent of their battery after the indicator light changes to indicate a full charge. Although the power of undercharge is only 1% ~ 3%, the impact on the range is almost negligible, but the accumulation of undercharge will also be formed, so after the battery is fully charged, the lamp will continue to float charge as much as possible, which is also good for suppressing battery vulcanization.

4. Timely charging

After the battery discharge began the vulcanization process, in the beginning of 12 hours, there is a significant vulcanization. Timely charging, can remove the serious sulfide, if not timely charging, these sulfide crystals will accumulate and gradually form coarse crystals, general charger is powerless to these coarse crystals, will gradually form the decline of battery capacity, shorten the service life of the battery. Therefore, in addition to charging every day, you should also pay attention to charging as soon as possible after using, so as to keep the battery in a full state.

5. Regular deep discharge

A regular deep discharge also helps "activate" the battery, increasing its capacity slightly. The usual method is to discharge the battery completely at regular intervals. The method of full discharge is cycling under normal load conditions on flat surfaces to the first undervoltage protection. Note that we place special emphasis on the first undervoltage protection. After the battery is under voltage protection for the first time, after a period of time, the voltage will rise and return to the non-under voltage state. At this time, if the battery is used again, it will do great harm to the battery. After complete discharge, the battery is fully charged. Will feel the battery capacity has increased.

Develop some good habits of saving electricity

Use taxiing whenever possible. For example, when going downhill, take advantage of the power cut ahead of time to slow down. Slide in ahead of the traffic light to minimize braking. A friend told me that he would rather make one more turn than one less brake, and it made sense. When starting, it is better to add riding power, which can not only improve the starting speed, but also reduce the loss of battery power and life damage.

7. Pay attention to the charging environment

Charging the best environment temperature is 25 ℃. Now most of the charger did not adapt to the environment temperature automatic control system, so most of the charger is designed according to the environmental temperature 25 ℃, so in 25 ℃ under the condition of charging is better. Otherwise, it is hard to avoid the problem of under-charging in winter and over-charging in summer. And ambient temperature at 25 ℃ real time is less, so it must be summer winter owe battery problem. Fortunately, most homes now have indoor thermostat conditions, so, when charging, it is best to arrange the battery and charger in a ventilated and thermostat environment.

In particular, the battery in the northern winter in the low temperature outside into the warm indoor state, the battery surface will appear frost condensation. In order to avoid battery leakage caused by frost and condensation, the battery should be charged after the battery temperature rises close to the indoor temperature and dries out.

8. Make full use of maintenance conditions

Many e-bike dealers can provide battery repair and maintenance services, should make full use of these services. Some brands of e-bikes are proposing battery overhauls. For example, regular maintenance of the battery can reduce the damage to the battery. Fixing the battery's charged state can mitigate "battery lag" failure, which is easy for dealers equipped with maintenance capabilities. For water loss, rehydration at 70 percent of the battery capacity is better than rehydration at 40 percent of the battery capacity. Even some brands claim that failure to repair within the required time is equivalent to giving up the battery warranty. Make consumer suffer the loss that should not happen. Therefore, consumers should make full use of the condition of battery maintenance to extend the service life of the battery.

Through these methods, users can greatly extend the battery life. Some users have shorter mileage, longer battery life, and problems are harder to spot. Therefore, the "deep discharge" measure mentioned in article 4 is also an effective way to detect battery problems in time, and it is not difficult to deal with when the battery problems are serious.

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