How to judge the battery capacity of electric vehicles

Electric vehicles are very common and convenient transportation for today's people, but everyone soon found that after using the electric vehicle battery for a period of time, the electric vehicle battery can't run out of mileage. It turns out that it can run thirty Kilometers, but now only run less than twenty, affecting the life of electric vehicle batteries. How should we judge the battery capacity of electric vehicles? Next, we will introduce to you.

1. Detect the battery capacity with a voltmeter plus load

How to judge the battery capacity of the electric vehicle? To detect the battery capacity, it is difficult to accurately check whether the battery capacity is sufficient by using the voltmeter or the multimeter's voltage block without load. When measuring voltage alone, the current consumption is extremely small, so there is no large voltage drop inside the battery, so the display voltage is not low, but if a considerable load is added, such as turning on the headlight (load current 10 to 15A), press The horn (load current 6 ~ 12A), the battery will make the light dim, the horn is hoarse, thus showing insufficient power storage.

2. Using a hydrometer to detect battery capacity

It is also a commonly used method. Generally, the standard specific gravity of the electrolyte at 20 ° C is 1.25 to 1.29 kg / L. If the battery is less than the above value at 20 ° C, the battery is more than 1.06 kg / L. The battery is low and needs to be charged. If the battery has a specific gravity of 1.06kg/L or less at 20 °C, the battery is completely discharged or damaged. According to this principle, the specific gravity of the battery electrolyte can be measured by a hydrometer to know the capacity of the battery, and the condition of the battery can be further determined.

3. Detect battery capacity with battery tester

In the daily maintenance and repair, you can quickly and accurately detect the battery capacity, or use the battery tester. When using, connect the battery tester to the battery for 10~15 seconds, keep the voltage at 10.5~11.6V, indicating that the capacity is sufficient, the battery is faultless; the voltage is kept at 9.6V~10.5V, indicating that the capacity is insufficient, the battery is faultless; the voltage drops to Below 9.6V, it indicates that the capacity is seriously insufficient or the battery is faulty.

The above are several methods for detecting the battery capacity of an electric vehicle. As long as you carefully follow these methods, the capacity of the electric vehicle battery can be detected. I hope to help everyone.

The page contains the contents of the machine translation.