Which is better compared to Li-ion, NiMH and NiCd batteries? NiMH batteries are synthesized with hydrogen ions and metallic nickel, with 30% more power reserve than NiCd batteries, lighter than NiCd batteries, longer service life, and no pollution to the environment and no memory effect. The price of NiMH batteries nickel-cadmium batteries are much more expensive, and the performance is worse than lithium batteries. The following to explain the lithium-ion batteries, nickel-metal hydride batteries and nickel-cadmium batteries compared to which is better?
Lithium-ion batteries, NiMH batteries and nickel-cadmium batteries compared to which is better?
The difference between lithium-ion batteries and NiMH batteries is mainly that lithium batteries are more suitable for use in cell phones, but in digital cameras, it is better to use NiMH batteries because the demand for electric flow is quite large and the power consumption is also much larger than that of cell phones.
The design of NiMH batteries originated from NiCd batteries, but there has been great progress in improving the memory effect of NiCd batteries. The main change is to replace the cadmium used in the negative electrode with a hydrogen storage alloy, so the NiMH battery can be said to be a typical representative of material innovation. The pollution caused by NiMH batteries is much less than that caused by NiCd batteries containing cadmium, therefore, NiCd batteries have been gradually replaced by NiMH batteries.
The introduction of NiMH batteries has given the industry a new hope for cell phone batteries, because the cost of this battery technology has not increased much compared to NiCd batteries, but the battery capacity has increased significantly. What also makes designers very happy is that compared to NiCd batteries, NiMH batteries are not only more environmentally friendly, but also have a less pronounced memory effect, which can be considered a very ideal alternative.
The advantages and disadvantages of lithium-ion batteries, nickel-metal hydride batteries and nickel-cadmium batteries
1, the advantages and disadvantages of lithium-ion batteries
Advantages: no memory effect, lighter weight. Disadvantages: high cost, low current, not resistant to overfilling (compared with NiMH).
2, the advantages and disadvantages of nickel-hydrogen batteries
Advantages: low price, high versatility, high current, environmental stability. Disadvantages: heavy weight, short battery life, memory effect.
3, the advantages and disadvantages of nickel-cadmium batteries
Advantages: "strong", cheap; disadvantages: cadmium metal pollution of the environment, small battery capacity, short life, memory effect.
Nickel-metal hydride and nickel-cadmium battery operating voltage is 1.2 V. But the volume of nickel-metal hydride than nickel-cadmium battery higher energy. Nickel-cadmium batteries have strong memory effect, while the memory effect of NiMH is very small. At the same time, NiCd batteries contain heavy metal cadmium, which has been banned. However, due to the excellent large multiplier discharge performance of NiCd batteries, NiMH batteries can not replace NiCd batteries in many power tools.
Lithium-ion batteries operate at a voltage of 3.7 V. The volume to energy ratio is higher than that of NiMH. But because of the previous disposable battery and NiMH battery operating voltage of 1.2 ~ 1.5V, two in series for 2.4V ~ 3.0V. most of the appliances have set this working voltage standard. So in this piece of civilian batteries, lithium can not yet replace NiMH batteries. NiMH, NiCd, Li-ion batteries in their respective fields at present can not be replaced by other batteries.
In lithium batteries, regardless of the various lithium series batteries need battery protection plates, which integrate over-current protection, over-voltage protection, over-discharge protection and other functions. When the weight becomes a key factor affecting the performance of the product and can be timely maintenance of the battery, the use of lithium batteries is the natural solution; and when the need for high power, good safety, high reliability and economic and practical, NiMH batteries will be more advantageous.
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