There are relevant national standards that can serve as a basis for testing lithium batteries. You can refer to it.
The usual tests include room temperature performance tests, environmental adaptability tests, safety tests and many others. test items.
The parameters that need to be detected are generally open circuit voltage, short circuit current, standard charging voltage, discharge curve, charging voltage and current, temperature, average compression performance, mass loss, etc. , and can also include low temperature, high temperature, fire, vibration and many other test items. You can search for "Lithium Battery Testing Standards" on the Internet for reference.
For rechargeable batteries, the so-called C refers to the capacity of the battery. For example, if the capacityof the battery is 1300 mAh, then 1C charge means the charging current is 1.3 A.
As a result, 1/2C is 650 mA
Adjust the multimeter to the DC voltage range. Select the voltage range based on the rated voltage of the battery and the multimeter. The principle is that the measuring range of the DC voltage range of the multimeter should be greater than the rated voltage of the battery.
Battery capacity is related to internal resistance and voltage across the battery. It is unlikely to directly measure battery capacity with a multimeter. However, the following method can be used to simply judge capacity. battery capacity.?
Measure the open circuit voltage of the battery. The voltage of a battery with sufficient capacity will not be lower than the normal value.
2. Battery current. Place the meter in the DC 500 current rangemA and connect the black pen to the negative terminal of the battery. Momentarily touch the positive battery terminal with a red pen. this means that the battery capacity is sufficient.
For example, if the nominal voltage of the battery is 12 volts (V), the multimeter will indicate 50 (V) or for speed 100 (V ), connect the red test lead to the positive (+) terminal of the battery and the black test lead to the negative (-) terminal of the battery, then read the indicated value of the meter.