The battery is good.
The only advantage of supercapacitors is fast charging, but the current energy storage density of supercapacitors cannot be compared with that of lithium batteries, and the Battery life is a big problem.
For example, a battery of the same size can travel 100 km, but a supercapacitor can only travel 30 km. There is still a long way to go before supercapacitors can replace batteries.
How big can a supercapacitor have the same performance as an 18650 lithium battery? What difference is there in the price?
Lithium batteries and supercapacitors are two different types of energy storage devices. They have the following differences:
1. Different energy storage mechanisms: Lithium batteries store and release energy by moving lithium ions between electpositive and negative rods, while supercapacitors store charge via electrostatic fields.
2. Different energy densities: Lithium batteries have a higher energy density because they can store a large amount of energy in a relatively small volume. Although supercapacitors can charge and discharge quickly, their energy density is relatively low.
3. Different charging and discharging speeds: Supercapacitors can charge and discharge quickly. On the other hand, lithium batteries take longer to complete the charging and discharging process.
4. Lifespan and repeatability: Lithium batteries are generally capable of multiple charge and discharge cycles, but have a short lifespan. Supercapacitors have a longer lifespan, can undergo more charge and discharge cycles, and have better repeatability.table.
5. Different application scenarios: Since supercapacitors have the characteristics of fast charging and discharging and long life, they are used in fields that require frequent charging and discharging, such as the power system of electric vehicles, fast batteries. load, etc. Widely used; while lithium batteries are used more in scenarios that require stable and long-term use, such as portable electronic devices, energy storage systems, etc.
If it is 1000 MAH, it generally needs to be replaced with a double supercapacitor, because to meet the voltage requirements, two supercapacitors connected in series will be 5.4V, which can meet the voltage requirements. capacity, it can According to the formula: E=1/2*5.4*5.4*C=3.6*0.1*3600, the capacity of the supercapacitor can be calculated as etant of 89F. Therefore, two 2.7V/180F series connections are required (this is when the supercapacitor voltage can be released to 0V. Generally, we cannot use 0V in our usage , the discharge range must therefore also be taken into account). Calculation based on the calculation that the discharge range of the lithium battery is generally 4.2 V to 2.75 V: C = 257 F, so two 2.7 V/500 F or more are required. It is recommended to leave some margin and use two 2.7 V/650 F. monomers in series.
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