Power storage application of supercapacitors

If the operating voltage exceeds the rated current of the module, the life of the module may be reduced. For super capacitors with high reliability , how to keep the working voltage within the specified range is an important point. It is necessary to control the working voltage of battery charging to ensure that it cannot exceed the rated current of each module.  

1. Supercapacitors have fixed optical rotation. Optical rotation should be determined before application.  

2. The supercapacitor should be applied under the nominal voltage: When the working voltage of the power capacitor exceeds the nominal voltage, the lithium battery electrolyte may be dissolved. In addition, the power capacitor will become hot, the volume will be reduced, the internal resistance will increase, and the service life will be shortened. Under some conditions, power capacitor characteristics may collapse.  

3. Supercapacitors cannot be used in the power supply circuit of high-frequency battery charging. Rapid battery charging at high frequency will cause the internal heating of the power capacitor, the volume attenuation coefficient, and the internal resistance to increase, which can cause the characteristics of the power capacitor to collapse under some conditions.

4. Lifespan of supercapacitors: The external operating temperature has a major impact on the lifespan of supercapacitors. Power capacitors should avoid pyrogens as much as possible.  

5. Current when the super capacitor is used as a reserve switching power supply: Because the super capacitor has a large internal resistance, there is a current at the moment of charging and discharging, ΔV=Work R.

6. Environmental vapors in application: Super capacitors cannot be placed in places with air humidity exceeding 85% or with harmful gases. Such environments can cause corrosion of wires and power capacitor casings, resulting in short circuits.  

7. Supercapacitor storage: Supercapacitors cannot be placed in high temperature, high and low temperature environments, and should be stored in an environment with a temperature of -30 to 50°C and an air humidity of less than 60% to prevent the temperature from rising and falling sharply. cause damage to the product.  

 8. Application of supercapacitors on double-sided pcb circuit boards: When supercapacitors are used on double-sided circuit boards, care must be taken that the junctions cannot pass through areas that can be touched by power capacitors, because the installation method of supercapacitors will cause short-circuit faults. .  

9. When the power capacitor is welded on the pcb circuit board, the shell of the power capacitor cannot touch the pcb circuit board, otherwise the welding material can penetrate into the wall of the power capacitor wiring hole, which will cause harm to the characteristics of the power capacitor .  

10. After installing the super capacitor, do not force the power capacitor to be skewed or shaken, which will cause the wires of the power capacitor to loosen and cause deterioration of the characteristics.  

11. Prevent the power capacitor from overheating during the welding process: If the power capacitor is overheated during the welding process, the service life of the power capacitor will be reduced. For example, if a printed circuit board with a thickness of 1.6 mm is used, the welding process Should be 260 ℃, the time should not exceed 5s.  

12. Cleaning after electric welding: After the power capacitor is welded by electric welding, the pcb circuit board and the power capacitor must be cleaned, because some residues are likely to cause short-circuit failure of the power capacitor.