How to Determine if a Battery is Good or Bad?
1 Answers
You can use a multimeter to test the condition of a battery. Measure the voltage of the battery when the circuit is connected. If the voltage across the battery drops significantly below the nominal voltage when the load is operating, the battery definitely has an issue. This method is based on the principle of the complete circuit Ohm's law, and the measured voltage value of the battery is relatively accurate. Here are other methods: 1. Capacity Test: The quality of an electric vehicle battery cannot be judged by appearance alone. It is generally recommended to purchase genuine batteries from reputable brand stores. The simplest method is to conduct a capacity test: drain the battery, then recharge it with the original charger. After a full charge, install it on the electric vehicle and perform a real-world road test. Under normal conditions, a 48V 18A battery can travel about 30 kilometers with a rider weighing approximately 55kg. 2. Distance Test: Under normal conditions, the farther the riding distance, the better. Pay attention to the test route and try not to completely drain the battery during the test, as this can harm the battery's subsequent maintenance and capacity. 3. Observe the Strength of the Spark: Use a wire to directly short-circuit the positive and negative terminals of the battery and observe the strength of the spark to determine if the voltage inside the battery is normal. A strong spark during the short circuit indicates a good battery, while a weak spark suggests a problem with the battery.
