5 situations of electric vehicles consume too fast and how to measure tram batteries
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To determine if the battery is invalid, it is damaged. Here we need to exclude the number of visuals, such as drums, the shell is rotted, so that there is no electricity after the charge is full, it is running to the tram. That is to discharge the battery.
Then use the multimeter to measure the voltage of several batteries, which voltage is low. The low voltage is generally the internal aging internal resistance value of the battery. You can also pick up the same load for each battery, such as a bulb.
After lighting the bulb, measure the current and the voltage of the battery in the line with a multimeter. According to current×Resistance = voltage, calculate the resistance, high resistance is bad. Ohm's law i = U / R, current unit security, voltage unit volts, resistance unit Europe error practice: filled with battery voltage, this time is not necessarily bad, maybe the battery is good, the capacity is slow, The voltage is also slow.
2, the temperature is not done with this temperature problem, the characteristics of the lead-acid battery, 1 degrees Celsius, the number of travels will be reduced by 0.8% -1%, which belongs to normal conditions, so winter electric cars are not durable. 3.
The charger is damaged, if the charger is broken or the interface contact is poorly caused by the abnormal charging. So it is best to find another charger to be charged once, exclude this reason. 4.
This solution is the simplest, give the tire. 5, electric vehicle motor aging, the internal fault motor aging caused the conversion rate, the efficiency of the motor. At this time, the power consumption speed of the tram will become fast.
There is also the internal failure of the brake, causing the friction of the bearing to become large, and will exacerbate power consumption. The motor in the electric car is generally a DC motor, there are two kinds of brush and no electric brush. We said that the aging generally refers to there are too many internal dirt, there is no lubricating oil, this kind of as long as the cleaning is oiled.
En. Through the above 5 cases, we can analyze, without measurement, it is not possible to determine the battery damage, and there are many external reasons. Multimeter is actually not a professional measurement tool.
The 12V lead-acid battery has a dedicated resistance amplifier, and the battery is removed by the following 20% below 20%, and each 12V battery, a positive and negative electrode and measuring instrument are observed separately. The state of the pointer, keeping about 10.8V, indicating that the battery is good, if the pointer is rapidly declining is the battery is broken.