What are the advantages and disadvantages of Ni-MH rechargeable batteries and lithium batteries

Advantages and disadvantages of nickel-metal hydride batteries Nickel-metal hydride batteries have a larger output current than carbon-zinc batteries or alkaline batteries, and are relatively more suitable for high-power consumption products. Some power-type special models have even greater output than general nickel-cadmium batteries. Current. Less obvious memory effect, even many brands of Ni-MH batteries have declared no memory effect. Long cycle life, it can be recycled more than 500 times under correct usage conditions. The old Ni-MH battery has a high self-discharge rate, with a self-discharge rate of 30 to 35% at room temperature when fully charged, but the new Ni-MH battery has a fairly low self-discharge rate. Poor high temperature resistance, try not to let the battery temperature higher than 45 degrees. Otherwise, the service life will be quickly reduced and the internal resistance of the battery will increase. Overcharging has a great impact on battery life and is dangerous, so stop charging when the battery is overflowed. ■The advantages and disadvantages of lithium batteries have higher energy. It has a high reserve density, which has reached 460-600Wh/kg, which is about 6-7 times that of lead-acid batteries; it has a long service life, which can reach more than 6 years; it has high power tolerance, including ferrous phosphate for electric vehicles Lithium-lithium battery can reach 15-30C charge and discharge capacity, which is convenient for high-intensity startup and acceleration; self-discharge rate is very low, which is one of the most prominent advantages of this battery. Generally, it can be less than 1%/month. 1/20 of the Ni-MH battery; light weight, the weight is about 1/6-1/5 of the lead-acid product under the same volume; the lithium battery has strong high and low temperature adaptability, and can be used in an environment of -20℃--60℃ , After the technical solution, it can be used in the environment of -45℃; the lithium battery is green and environmentally friendly, regardless of processing, use and scrap, it does not contain or appear any toxic and harmful heavy metal elements and substances such as lead, mercury, cadmium, etc.; Lithium The primary batteries have poor safety, and there is a danger of explosion; the use conditions are limited, and the use of high and low temperature is dangerous. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Why is the performance of lithium batteries degraded?