Why are nickel-metal hydride batteries replaced by lithium-ion batteries?

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Why are nickel-metal hydride batteries replaced by lithium-ion batteries?

Posted Date: 2024-01-16

With the rapid development of technology, the battery industry is also undergoing earth-shaking changes. In the process, some battery technologies that once dominated the market, such as nickel-metal hydride batteries, are gradually being phased out. This article will analyze in detail the reasons why nickel-metal hydride batteries have been eliminated.

1. Technical performance limitations

Compared with lithium-ion batteries, nickel-metal hydride batteries have a large gap in energy density. Energy density determines the amount of electrical energy a battery can store per unit volume or mass. The energy density of nickel-metal hydride batteries is low, which means that they can store relatively less electrical energy at the same volume or mass. This makes nickel-metal hydride batteries unable to cope with high energy demand application scenarios, such as electric vehicles, smartphones, etc.

2. Charging speed is slow

Nickel-metal hydride batteries charge relatively slowly and cannot meet the fast charging needs of modern consumers. Compared to lithium-ion batteries, nickel-metal hydride batteries take longer to complete the charging process. In the fast-paced modern life, people have higher and higher requirements for charging speed. The disadvantages of nickel-metal hydride batteries in this regard have led to the gradual reduction of their market share.

3. Relatively short lifespan

The cycle life of nickel-metal hydride batteries is relatively short, that is, the battery performance decays quickly after multiple charges and discharges. This means that nickel-metal hydride batteries need to be replaced more frequently during use, increasing the cost of use for users. In contrast, lithium-ion batteries have a longer cycle life, which can reduce the frequency of battery replacement and reduce usage costs.

4. Environmental issues

There are certain environmental problems in the production and use of nickel-metal hydride batteries. For example, the nickel and hydrogen elements in batteries may have certain impacts on the environment and human health. Although nickel-metal hydride batteries have made some progress in recycling and processing, compared with lithium-ion batteries, their environmental disadvantages are still obvious.

5. Higher cost

Although nickel-metal hydride batteries have certain advantages in certain performance aspects, their production costs are relatively high. As lithium-ion battery technology continues to develop and mature, its production costs are gradually reduced, making lithium-ion batteries more competitive in price. This further challenges the position of nickel-metal hydride batteries in the market.

To sum up, the main reasons for the elimination of nickel-metal hydride batteries include technical performance limitations, slow charging speed, relatively short lifespan, environmental issues and high cost. With the advancement of technology and changes in market demand, new battery technologies such as lithium-ion batteries have gradually dominated the market, while nickel-metal hydride batteries have gradually withdrawn from the stage of history.

About Bell:

Guangdong Bell Testing Equipment Co., Ltd. is a high-tech enterprise dedicated to the research and development, manufacturing and sales of environmental reliability testing equipment, battery safety testing equipment and vehicle testing equipment. Cases can be found in major research institutes, schools, testing institutions, enterprises, laboratories, etc. across the country. It has mature experience and installation capabilities in designing and manufacturing large-scale non-standard complex test equipment, and can provide first-class solutions for customers' product testing.

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