Features and known disadvantages of NiMH batteries

Many people think that nickel-metal hydride batteries will gradually be eliminated, because lithium batteries may have better performance, but from an environmental perspective, nickel batteries may be better than lithium batteries. This is one of the reasons why Toyota always insists on using nickel-metal hydride batteries. In addition, the Ni-MH battery is also very safe. Because it uses liquid water as the electrolyte, the Ni-MH battery will not catch fire and explode even under extreme conditions. Advantages of Ni-MH battery: 1. Wide range of applications: 1.2V discharge platform can present a variety of combinations, which are widely used in: electric power meters, mechanical automation, engineering measuring instruments, aircraft models, remote control vehicles, remote control ships, emergency Lamps, solar lawn lights, remote control equipment, and digital microphones 2, long service life: the single use times of high-performance Ni-MH batteries are almost equal to those of lithium batteries. The tolerance to overcharge and overdischarge is better than that of lithium batteries. 3. Sealed type, less maintenance. 4. The self-discharge rate is acceptable. Although compared with lithium batteries, the self-discharge of nickel-metal hydride batteries is still large, but some high-performance nickel-metal hydride batteries have even better self-discharge rates than lithium batteries. Some nickel-metal hydride batteries can Stored at room temperature for about 10 years, it can still be used. Conventional Ni-MH batteries on the market now have a certain low self-discharge performance. Conventional Ni-MH batteries can be stored for 1 year at room temperature and can still be used normally. Disadvantages of nickel-metal hydride batteries 1. The weight is too large. The energy density of nickel-metal hydride batteries is always lower than that of lithium batteries due to the influence of materials. The weight of nickel-metal hydride batteries with the same energy ratio will be heavier. 2. The charge management is complicated, and the consistency of single batteries is quite different, which seriously affects the battery life of the group. 3. There is still a memory effect, although it is very weak, but long-term use, occasionally discharge the power and continue to charge can restore some capacity. 4. Low energy density caused a large volume and high weight, which is a very troublesome problem. Pure electric vehicles use nickel-metal hydride batteries, which seems unrealistic. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: New energy vehicle lithium battery recycling is difficult