super Farad capacitor It does have many advantages. It stores electric energy in physical form, has a long service life, fast charging and discharging, and small internal resistance. However, it also has the disadvantage of death, that is, it is expensive, and the capacity is too small in the same volume. Theoretically, it can replace the batteries such as cars and motorcycles. There is no problem in technology, mainly because of economic reasons and engineering applications.
Under the same volume, the capacity of super capacitor is only one twentieth of that of lead-acid battery. Conversely, if you want to install a super capacitor with the same capacity on your car, it needs a volume as large as 20 batteries. Of course, it is impossible to calculate it completely according to this standard. However, if you really use a super capacitor, it does not need such a large capacity. After all, it has high charging and discharging efficiency, However, it is difficult to achieve this because of the large volume of many batteries.
Someone has done a test. The car can be started normally with a 17 volt 1000F super capacitor bank. Even at 500F, it can meet the requirements, because the power is supplied continuously when the car is started, and the capacitor only plays a buffer role. Super capacitor manufacturer There is no problem with starting the car, but the electronic system in the car uses a lot of power, such as anti-theft system, ECU, and on-board electrical appliances. The capacitor will soon run out of power. If you use the car normally, if you forget to turn off the fan headlamp stereo for a few minutes when the engine is off, I'm afraid it will be enough trouble.
Even a 1000F super capacitor bank costs more than 800 yuan, which is not cheap. Generally, a 60AH car battery costs less than 500 yuan. In terms of capacity comparison, the 1000F capacity is a drop in the bucket compared with the 60AH capacity. At present, the car still uses lead-acid batteries lithium battery The fundamental reason is the price problem.
Generally, if the voltage of lead-acid battery is lower than 10.8 V, it will not be able to get on the car normally. However, if the super capacitor is used, it can really get on the car smoothly at about 9 V. Super capacitor module The battery life is hundreds of cycles, and the capacitor can achieve hundreds of thousands of times, several times longer than the life of the car. The instant discharge of the battery is also limited. There is no problem for the super capacitor to reach 2000 amperes, and there is no power loss problem. The battery cannot be used until there is no power.
Generally, Farad capacitor and lead-acid battery are used in parallel. Of course, it should be properly considered to add some boost circuits to prevent the battery from charging the capacitor when it starts because the voltage of the capacitor is low. The parallel operation can extend the life of the battery, make it easy to start, ensure the burning energy, and improve the power of the car to a certain extent. In this way, a 100-200F capacitor is enough, and it is also economical.
