May 25, 2019 Pageview：101
How many years can an electric vehicle lithium battery last? I believe that most consumers have heard that the life of lithium batteries is "500 times" and 500 times of charge and discharge. More than this number of times, the battery will be "dying down". Many friends are trying to extend the life of the battery every time. Charging when the battery is completely exhausted, does this really extend the life of the battery? The answer is negative. The life of a lithium battery is "500 times", which means not the number of times of charging, but a period of charging and discharging.
A charge cycle means that all of the battery's charge is from full to empty, and then from empty to full, which is not the same as charging. For example, a lithium battery used only half of the power on the first day, and then charged it slowly. If it is still the next day, it will be charged in half, and it will be charged twice in total. This can only be counted as one charging cycle, not two. Therefore, it is usually possible to complete a cycle after several charges. The battery capacity is reduced a little every time a charge cycle is completed. However, this amount of power is very small, and high-quality batteries will retain 80% of the original capacity after many cycles. Many lithium-powered products will still be used after two or three years. Of course, the life of the lithium battery still needs to be replaced after the end.
The so-called 500 times means that the manufacturer has achieved 625 times of chargeable times at a constant depth of discharge, reaching 500 charge cycles.
Due to various influences in real life, especially the discharge depth during charging is not constant, so "500 charging cycles" can only be used as a reference battery life.
We often have "the lithium battery is exhausted and then recharged" or "the lithium battery is full and then continue to rush, must be charged for 12 hours" misunderstanding. As everyone knows, if you overcharge or over-discharge the lithium battery, you will not be able to extend the life of the lithium battery of the electric vehicle, but will shorten it. So how to use lithium batteries correctly, I introduce you to the correct use of lithium batteries to help you extend the life of lithium batteries for electric vehicles.
Introduction to the correct use of lithium batteries for electric vehicles:
1, charging every day
Even if your electric car lithium battery can be used for 2 to 3 days with a single charge, it is recommended that you charge it every day. Since the lithium battery after use is in a shallow cycle state, charging every day will prolong the life of the lithium battery of the electric vehicle.
2, timely charging
Because the lithium battery will enter the vulcanization process after discharge, if it is charged in time, it can remove the less severe vulcanization. Therefore, the lithium battery should be charged as soon as possible after use, so that the battery is fully charged.
3, regular deep discharge
Regular periodic discharge of the battery also facilitates "activation" of the battery, which can slightly increase the capacity of the battery. The general method is to periodically discharge the battery completely.
The method of full discharge is to ride to the first under voltage protection under normal load conditions on a flat road.
After the battery is under the first under voltage protection, after the battery has passed for a period of time, the voltage is restored to the non-under voltage state. At this time, the battery is fully charged, which will increase the battery capacity.
It should be noted that when the lithium battery is under voltage protection for the first time, please remember not to use the battery. At this time, the damage to the lithium battery is very large.
4, try to use the original charger
In general, chargers from various manufacturers generally have individualized requirements, so don't change the charger when you are not sure. In addition, do not remove the controller's speed limit, remove the controller's speed limit, although it can improve the speed of some cars, but will reduce the battery life.
In fact, there are many electric car lithium battery correct use method. When you buy an electric car, there are usually instructions for use. For your electric car lithium battery can live longer, I remind you that you must follow the correct use of electric vehicle lithium battery, do not overcharge or over discharge lithium battery.
1. Do not replace the charger at random and do not remove the speed limit of the controller.
Chargers from various manufacturers generally have individual needs, so don't change the charger when you are not sure. If the mileage requirement is longer, you must equip multiple chargers for off-site charging. Charge the charger for the daytime supplement with an additional and use the original charger at night. Removing the controller's speed limit, although it can improve the speed of some cars, but in addition to reducing the safety of the car, it will also reduce the battery life.
2, protect the charger
The general instructions for use have instructions for protecting the charger. Many users do not have the habit of reading the manual. They often think of looking for the manual after the problem. It is often too late, so it is very necessary to read the manual first. In order to reduce the cost, the current chargers basically do not have a high vibration-resistant design, so that the charger is generally not placed in the trunk and basket of the electric bicycle. In the case of special movements, the charger should also be packaged in foam to prevent bumps. After many chargers are vibrated, their internal potentiometers will drift, causing the entire parameters to drift, resulting in an abnormal state of charge. Another thing to note is that the charger should be kept ventilated during charging. Otherwise, it will not only affect the life of the charger, but also cause thermal drift and affect the state of charge. This will cause damage to the battery. Therefore, it is very important to protect the charger.
3, charging every day
Even if your continuation ability is not long, you can use it for 2 to 3 days, but it is recommended that you charge every day, so that the battery is in a shallow cycle and the battery life will be extended. Some users who used mobile phones early thought that the battery should be recharged after basic use. This view is wrong. The memory efficiency of lead-acid batteries is not so strong. Frequent discharge of electricity has a greater impact on the life of the battery. Most chargers may charge 97% to 99% of the battery after the indicator light is fully charged. Although only undercharged 1% to 3% of the power, the impact on the continuation ability is almost negligible, but it will also form undercharge accumulation, so after the battery is fully charged, it will continue to float as much as possible, to suppress the battery beneficial vulcanization.
4, timely charging
The vulcanization process started after the battery was discharged, and at the beginning of 12 hours, significant vulcanization occurred. Timely charging can remove non-severe vulcanization. If not recharged in time, these vulcanized crystals will accumulate and gradually form coarse crystals. The general charger is powerless to these coarse crystals, which will gradually reduce the battery capacity and shorten the battery life. Therefore, in addition to charging every day, it is also necessary to pay attention to the early charging after use, as much as possible to make the battery full.
5, regular deep discharge
Regular periodic discharge of the battery also facilitates "activation" of the battery, which can slightly increase the capacity of the battery. The general method is to periodically discharge the battery completely. The method of full discharge is to ride to the first under voltage protection under normal load conditions on a flat road. Note that we place special emphasis on the first under voltage protection. After the battery is under the first under voltage protection, after a period of time, the voltage will rise and return to the non-under voltage state. If the battery is used again, the battery will be seriously damaged. After the complete discharge is completed, the battery is fully charged. Will feel the battery capacity has improved.
6, develop some good habits of saving electricity
Use sliding as much as possible. When using the following slopes, use the early power-off slide to reduce the speed as much as possible. Slide in ahead of the traffic light to minimize braking. A friend told me that he would rather turn the bay once more and also reduce the brakes. This makes sense.
When starting up, it is best to add riding assistance, not only can increase the starting speed, but also reduce battery power loss and life damage.
7, pay attention to the charging environment
The best ambient temperature for charging is 25 °C. Most chargers now do not have an automatic control system that adapts to the ambient temperature, so most chargers are designed for an ambient temperature of 25 ° C, so charging at 25 ° C is better. Otherwise, it will inevitably have problems of under-charging in winter and over-charging in summer. The ambient temperature is really less at 25 ° C, so there will be a problem of under-charging over-charging in summer. Fortunately, most families now have indoor temperature adjustment conditions, so when charging, it is best to arrange the battery and charger in a ventilated and temperature-controlled environment.
It is especially pointed out that when the battery enters the warm room in the outdoor low temperature in the north in winter, frost condensation will appear on the surface of the battery. In order to avoid leakage of the battery caused by frost condensation, it should be charged after the battery temperature rises to be close to the room temperature and dried.
8, make full use of maintenance conditions
Many electric bicycle dealers can provide battery overhaul and repair services, and should make full use of these services. Some brands of electric bicycles have been proposed to overhaul the battery. For example, regular maintenance of the battery can reduce damage to the battery. The repair of the state of charge of the battery can alleviate the "battery behind" failure, which is a breeze for dealers equipped with maintenance capabilities. For water loss, when the battery capacity is 70%, the hydration effect is better than the battery capacity of 40%. Even some brands of products have suggested that not going through the prescribed time is equivalent to giving up the warranty period of the battery. Consumers are subject to losses that should not occur. Therefore, consumers should make full use of the conditions of battery maintenance to increase the service life of the battery.
The page contains the contents of the machine translation.
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