How to Identify Power Batteries in Cars?
1 Answers
By external dimensions, the 18650 battery has a diameter of 18MM and a height of 65MM, which can be measured precisely with calipers. Identify its appearance and PVC; the quality and condition can help distinguish its advantages and disadvantages. Observe its appearance to determine if it is a brand-name battery. Use a multimeter to measure its voltage. There are many types of batteries on the market, such as lithium cobalt oxide, lithium iron phosphate, and lithium manganese oxide as cathode materials, with voltages of 3.7V, 3.2V, and 3.7V respectively, each having its own advantages. The cathode and anode materials of 18650 power batteries have smaller particles, and the separator and electrolyte between them have stronger conductivity. Power batteries support high-current discharge, and the resistance of the cathode and anode is also lower, which is designed to facilitate high-current discharge. The 18650 battery was first introduced by Japan's Sony Corporation. The capacity of 18650 power batteries is generally about half that of ordinary 18650 lithium batteries. For example, a capacity-type 2000mAh 18650 lithium battery would only have about 1000mAh in its power-type counterpart. The maximum charging voltage for ordinary capacity-type 18650 lithium batteries is 4.2V, while for power-type 18650 lithium batteries, it is around 3.65V.
