What is the difference between Li-ion battery packs and NiMH batteries? For use, Li-ion battery pack is basically an exclusive specification, the cost is also slightly more expensive than the general specifications of NiMH, and once a certain model of cell phone is discontinued for a period of time, the matching battery can not be bought, the old battery is obsolete we have to replace the phone. The following take you to understand what is the difference between lithium battery pack and NiMH battery?
What is the difference between Li-ion battery pack and NiMH battery?
Many consumers in the process of battery use, there are often the same concept of battery use, now the lithium battery pack has been the mainstream, but the past use of nickel-hydrogen batteries are still applied to the lithium battery, in fact, lithium battery pack and nickel-hydrogen batteries, in addition to the product is not the same, the use of different ways.
1, the monomer voltage is different, the voltage of lithium battery pack is 3.7-4.2V, the voltage of NiMH battery is only 1.2V, the electric capacity of a lithium battery pack is equivalent to three NiMH batteries in series.
2, lithium battery pack charging requirements and nickel-metal hydride batteries are different. As the power is filled, the lithium battery pack voltage will slowly rise, which is also a sign to determine whether the lithium battery pack is full, the general manufacturer recommended to suspend the charging voltage of 4.2 V. The charging of the lithium battery pack is generally used to limit the voltage and current method, if a friend wants to charge the lithium battery pack independently need to pay attention to its charging method is different from the constant current charging method used for NiMH batteries.
3, lithium battery pack and nickel-metal hydride batteries have the advantages of small size, light weight, low self-discharge rate, no memory effect, is widely used in many new mobile devices. We usually use cell phones, laptops and other mobile equipment batteries have been gradually replaced by lithium battery pack; NiMH battery memory effect is not very obvious, to be used in a hurry, not necessarily to put the light after re-charging, the usual use is best to be discharged and then sufficient.
4, the memory effect is different, lithium batteries do not have the memory effect, can be used with the charge; nickel-hydrogen batteries have a certain memory effect, usually the best use of full discharge full charge, so as not to affect the battery capacity.
5, self-discharge phenomenon is different, although compared with nickel-cadmium batteries, nickel-hydrogen batteries do not have a large self-discharge, but compared with the almost negligible self-discharge of lithium batteries, nickel-hydrogen batteries are simply the king of discharge.
6, in the same volume, the lithium battery pack than the nickel-metal hydride battery capacity, so its talk, standby time are longer than the nickel-metal hydride battery, the price is also higher than the nickel-metal hydride battery; and in general, the nickel-metal hydride battery can not do with the use of charging, convenience greatly reduced.
NiMH batteries are the next generation of NiCd rechargeable batteries, with improved energy ratio compared to NiCd, low voltage, slight memory effect, certain pollution to the environment, moderate price, and battery life of about 1000 times. Peripheral NiMH hybrid cars, electric models many use NiMH batteries.
Lithium battery pack is currently the highest level of rechargeable batteries, but 10 years after its birth, the unit material energy ratio has only increased by 10%, and there has been no major breakthrough. Lithium battery pack energy ratio is relatively higher, high voltage, no memory effect, no pollution, higher prices, battery life: lithium iron phosphate in more than 2000 times, lithium manganese acid is about 500 times.
Many consumers have been educated by the cell phone industry, think that the lithium battery pack is better, in fact, the current NiMH battery memory is quite mild, but the consumer's concept of NiMH batteries have been outdated and easy to die, in fact, the lithium battery pack used in cell phones is more suitable than NiMH batteries.
But in the use of digital cameras, because the digital camera for the flow of electricity demand is quite large, coupled with power consumption is also much larger than the cell phone, in the high current output of this part of the NiMH battery is slightly better, coupled with NiMH batteries can use the general market alkaline batteries for emergency, lithium most of the benefits do not have this, so in the choice of digital cameras do not have a tendency to lithium battery pack models.
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