Which is better, nickel-metal hydride battery or lithium battery?

Which is better, nickel-metal hydride battery or lithium battery? Consumers are more concerned about what type of battery the device uses after purchasing electronic devices that require batteries. Often users will ask whether it is better to use nickel-metal hydride batteries or lithium batteries. In fact, this cannot be generalized. For devices with different performances, Only a more suitable battery type can be matched to achieve better product performance; Ni-MH rechargeable battery: Ni-MH battery is a kind of battery with good performance. Ni-MH batteries are divided into high-voltage nickel-hydrogen batteries and low-voltage nickel-hydrogen batteries. The positive electrode active material of the nickel-hydrogen battery is Ni, the negative electrode active material is a metal hydride, also called a hydrogen storage alloy, and the electrolyte is a 6mol/L potassium hydroxide solution. As an important direction of hydrogen energy application, nickel-metal hydride batteries have attracted more and more attention. In terms of battery power, nickel-metal hydride rechargeable batteries of the same size have about 1.5 to 2 times higher power than nickel-cadmium batteries, and are free of cadmium pollution. They are now widely used in various small portable electronic devices such as mobile communications and notebook computers. . Larger capacity Ni-MH batteries have begun to be used in gasoline/electric hybrid vehicles. Pay attention to maintenance when using Ni-MH batteries 1. Avoid overcharging during use. During the cycle life, avoid overcharging during use. This is because overcharging easily causes the positive and negative electrodes to expand, causing the active material to fall off, the diaphragm is damaged, the conductive network is damaged, and the ohmic polarization of the battery becomes larger. 2. Prevent the electrolyte from deteriorating. During the cycle life of Ni-MH batteries, the hydrogen evolution of the battery should be suppressed. 3. Storage of Ni-MH batteries. The storage of Ni-MH batteries should be fully charged. If the battery is stored for a long time without storing electric energy in the battery, the function of the hydrogen storage alloy at the negative electrode of the battery will be weakened and the battery life will be shortened. Which is better, nickel-metal hydride battery or lithium battery? ■The advantages and disadvantages of nickel-metal hydride batteries Ni-MH 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 are even larger than ordinary nickel-cadmium batteries. Output 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 storage self-discharge rate of 30-35% at full charge and room temperature, 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 has a certain degree of danger, so when the battery is fully charged, stop charging. ■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-ion battery can reach 15-30C charge and discharge capacity, which is convenient for high-intensity start-up acceleration; self-discharge rate is very low, which is one of the most prominent advantages of this battery, generally can achieve less than 1%/month, not To 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 adaptability to high and low temperature, and can be in the environment of -20℃--60℃ It can be used in an environment of -45℃ after processing. Lithium battery is green and environmentally friendly. Regardless of production, use or scrap, it does not contain or produce any lead, mercury, cadmium and other toxic and harmful heavy metal elements and substances; Lithium 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. The main difference between lithium batteries and nickel-metal hydride batteries is that lithium batteries are more suitable for mobile phones, but for digital cameras, because the current demand is quite large, and the power consumption is much larger than that of mobile phones, it is necessary to use nickel-metal hydride batteries. Better. In recent years, more and more digital cameras use Ni-MH batteries. Battery manufacturers are also optimistic about this market. They have launched high-capacity Ni-MH rechargeable batteries. This makes the technology of Ni-MH batteries advance by leaps and bounds. The batteries are on par, and even the charger is getting better and better, and the charging time is greatly shortened. As a relatively mature product, the manufacturing cost of nickel-hydrogen battery is much lower than that of lithium battery. In addition, the quality control of nickel-hydrogen battery is very difficult, and the yield rate of nickel-hydrogen battery produced is much higher than that of lithium battery. Therefore, under the combined effect of manufacturing cost and high yield, Ni-MH batteries are more economical. In addition, nickel-metal hydride batteries contain no harmful substances and are relatively environmentally friendly. At the same time, because the components of nickel-metal hydride batteries contain rare earths, they can also be recycled. Compared with lithium batteries, they are also more environmentally friendly. At present, in many high-tech fields, nickel-metal hydride batteries have become the first choice. Even in the automotive industry, many manufacturers have begun to use nickel-metal hydride batteries to improve their market response. Rechargeable lithium batteries are widely used in many new mobile devices because they have the advantages of small size (relatively), light weight, low self-discharge rate, and no memory effect compared with ordinary nickel-cadmium/nickel-metal hydride batteries. The batteries of mobile devices such as mobile phones, laptops, and PDAs that we usually use have gradually been replaced by lithium batteries. The above is the comparison between Ni-MH rechargeable batteries and lithium batteries. No matter what kind of battery, the best one is for you! 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 article: How far can the 48V20Ah lithium-ion battery run?