How to judge the quality of electric car battery

Electric vehicle battery is the power source of electric vehicle, so the battery is very important for electric vehicle. There are the following ways to distinguish the quality of electric vehicle battery:

(1) check whether the outer package is damaged or has been disassembled; (2) check the appearance of the battery itself, and observe whether there are scratch marks and whether there are rust phenomena in the position of terminals of positive and negative electrodes; (3) check whether there is a security label on the battery shell, whether the production date is long, whether the manufacturer's relevant information mark is complete, and whether the writing is clear and complete. If the external packaging of the battery is at or above 1 point, the battery is considered to be old, and there may be quality problems.

2, in the process of pilot testing the merits of the battery, will be just full of battery installed on the electric vehicle batteries, start the electric power supply, sudden acceleration in the process of driving electric cars, to observe the changes of electricity meter pointer CLP scale: (1) to accelerate the cycling process the pointer to the whereabouts of less than half of the case, it concludes that the battery is brand new or better performance; (2) if the pointer of the electric meter falls 1 or even 2 grid in the process of accelerating riding, the battery is judged to be old or of poor quality; (3) when the pointer of the electricity meter falls 3 or even 4 grid in the process of accelerating cycling, it can be judged that the battery is the product of fake new battery after being repaired by scrapped battery, which is of extremely poor quality.

China electric vehicle alliance members answer: consumers do not understand the correct use of batteries some consumers use the battery method is improper, one is a long time to charge, think the longer the charge time the more sufficient power; Second, a long time loss of electricity, until the run can not move to charge; Three is in the temperature is too high or too low under the circumstances of charging; Fourth, do not pay attention to the regular inspection and maintenance of the battery. How to charge and discharge correctly can prolong the life of the battery to a certain extent. Do a simple introduction on the correct use method now: one, not suitable to ride on the life of the battery is determined by the charge and discharge cycle times, the more times the charge and discharge life is reduced the faster. Therefore, you should not charge your bike as soon as you have ridden it. Instead, you should charge it when the maximum range of the battery is 60-70%. Second, charging time should not be too long many electric vehicle users think that the longer the charging time the more sufficient battery power. This is very wrong. Generally, it is best to extend the charging time within one hour after the charger changes the light. Over - charge for a long time will easily lead to battery deformation, water loss and other phenomena. Thus directly endangering the battery life. Three, it is best to use the smart socket many electric car users go home from work to charge, the next day to work when cut off the power supply, in fact, most of the charger can not 100 percent guarantee in the battery is full of automatic power failure. The best way is to choose and buy smart socket, set a good time when charging, so you can solve the problem of rest at ease at night. Four, strictly prohibit the loss of electricity to exercise some users until the electric bicycle can not move to recharge, so seriously damage the battery performance. Multiple deep discharges can greatly shorten battery life. If the power is not enough on the way, it is better to pedal power ahead of time to avoid deep discharge. 5. Do not charge the battery at too high or too low temperature. In the charging process, the battery itself will generate a small amount of heat. Charging at too high a temperature will increase the temperature of the bottle and damage the performance of the battery. The temperature is too low. The battery receives the ability to be poor, the activity weakens, the battery quantity is insufficient, the charge and discharge frequency increases, shortens the battery life.

1. The battery should be firmly installed on the e-bike to prevent the battery from being damaged by vibration during riding.

2. Regularly remove dust and dirt from the cap of the battery, and keep the battery dry and clean to prevent self-discharge.

3, never let the battery in the state of low power for a long time, and to develop a good habit of charging the battery every night.

4. When the e-bike starts, it should be started with pedal power to avoid damage to the battery caused by excessive discharge current.

5. When riding, please pay attention not to discharge the battery, which may lead to serious battery loss and greatly shorten its service life. Electric bicycles are generally equipped with under-voltage protection function, when the battery power display only one display light, should immediately charge the battery, lest the battery too discharge.

1. Watch the new and old batteries:

In fact, this is very easy to judge, generally get hand, look at the appearance can be judged, whether there is a rub, rub

Then look at the battery positive and negative metal parts whether there is rust.

2. Use professional voltage measurement tools to determine whether the battery has an internal short circuit (bad battery) :

If you ride for a while or leave the car for a few hours after charging, measure the voltage at the charging plug

A normal battery (old or new) is 48 volts or slightly higher. If you can only get up to 46 volts or less, you have one

There is a short circuit in each battery (there are four sets of batteries in the 48-volt car, each set is connected by 6 2-volt batteries in series to become 12 volts)

The 10-volt group is the bad battery.

3. Judge the scrapped battery:

1) just full of power, if suddenly accelerate the ride, the power meter needle only fall less than half grid (a small scale),

It's a new battery.

2) just full of power, if suddenly accelerate the ride, the power of the hand drop a grid, it is half new battery.

3) just full of power, if suddenly accelerate the ride, the power of the meter needle fall 2-3 grid, it is quickly scrapped

Old battery (fully charged half moon does not ride will self discharge run light).

4) after being fully charged, the battery will be scrapped if the rider suddenly accelerates to ride more than four grids. (a full week is not enough

Ride, electricity will run light.

The page contains the contents of the machine translation.