18650 lithium battery cells

　　What is the difference between 18650 lithium battery cells and nickel-metal hydride batteries?

　　1. Volume.

　　Compared with nickel-metal hydride batteries, lithium battery packs have the advantages of small size, light weight, low battery life, and no memory, and are widely used in many new mobile terminals. The batteries in our common mobile phones, laptops and other mobile terminals have gradually been replaced by lithium batteries. Ni-MH rechargeable batteries with less obvious memory do not necessarily need to be discharged before charging when needed urgently. It is best to use it at ordinary times, and then use it fully after lighting.

　　2. Electricity.

　　Rechargeable batteries have high energy density and are small. The working voltage of a single lithium battery is three times that of a nickel-metal hydride rechargeable battery. It has no memory and can be used whenever it is charged. However, the battery cannot be charged for a period of time. Excessive charging and discharging will affect the battery cycle. Lithium batteries that are not suitable for long-term storage will permanently lose part of their capacity over time. After the battery is charged 40%, it is best to store it in the freezer of the refrigerator.

　　Third, the battery charging method.

　　The charging regulations for lithium batteries are different from those for nickel-metal hydride batteries. As the lithium battery is filled with electricity, the working voltage will slowly increase. This is also an indicator of whether the lithium battery is filled. Generally, manufacturers recommend that the charging stop voltage is. Generally, lithium batteries are charged using pressure overcurrent protection. If you want to charge lithium batteries independently, please note that its charging method is different from the constant current charging method of nickel-metal hydride rechargeable batteries. .

　　Fourth, it is a single working voltage.

　　The voltage of lithium battery is 3.7-, while the working voltage of nickel-metal hydride rechargeable battery is only 1-. Its capacity can be used in series with three nickel-metal hydride rechargeable batteries.

　　Fifth, is the battery charging rate.

　　Because 18650 lithium battery cells have flexible characteristics and can move quickly within the rechargeable battery, the current is higher and the battery can be charged quickly. A lithium battery will be filled in about 3 hours; while the nickel-metal hydride rechargeable battery charges slowly and may require It takes 1 day to fill up.

　　Sixth, it is specific energy.

　　Lithium rechargeable batteries have high specific energy. In the first batch of marketing promotion documents this year, the specific energy of pure electric vehicle power lithium batteries has exceeded 160Wh/kg; the specific energy of nickel-metal hydride rechargeable batteries is low, only 40~70Wh/kg. Therefore, under the same capacity, the capacity of lithium batteries exceeds that of nickel-metal hydride rechargeable batteries.

　　Seventh, it is memory.

　　Rechargeable batteries have no memory and can be charged at any time; nickel-metal hydride rechargeable batteries have a certain memory and it is best to ensure full charge during normal use to avoid damaging the battery power.

　　8. Lithium battery life status.

　　Compared with nickel-cadmium batteries, the lithium battery life of nickel-metal hydride rechargeable batteries is small, but compared with the lithium battery life, it is almost negligible. Ni-MH rechargeable batteries are really the leader in charge and discharge.

　　9. Price.

　　Lithium rechargeable batteries are expensive, while NiMH rechargeable batteries are more cost-effective. However, the price of lithium batteries has dropped rapidly in the past two years.

　　10. Application deadline.

　　The lithium battery of the nickel hydride rechargeable battery has a long life and has memory function, and its service life is much shorter than that of the lithium battery.

　　11.Application fields.

　　At present, the use of lithium batteries in new energy vehicles is very important, and the same is true for nickel-metal hydride rechargeable batteries in Japanese gasoline-electric hybrid cars. As everyone knows, in practice, nickel-metal hydride rechargeable batteries are used in a wider range of applications than lithium batteries.

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