Supercapacitors have a fixed polarity and should be used before they are used.Recognition. Supercapacitors should be used under nominal voltage: electricity When the container voltage exceeds the nominal voltage, the electrolyte will decompose.The capacitor will heat up, the capacity will decrease, and the internal resistance will increase.Shorten。 Super capacitors can not be applied to high frequency charging and discharging electricity.In the road, high frequency charge and discharge will lead to internal capacitor.Heat, capacity decay and internal resistance increase, which can lead to electricity in some cases.The performance of the container crashes.When supercapacitors are used in series, there are monomers.Voltage equilibrium problem. A simple series will lead to one or more Several monomer capacitors overvoltage, thus damaging these capacitors.The performance is affected.

Super capacitor is a better energy storage element between traditional physical capacitor and battery. Its great superiority is:
(1) high power density. The internal resistance of ultracapacitor is very small, and the charge can be stored and released quickly in the electrode / solution interface and the electrode material body.
The cycle life of charge discharge and discharge is long. exceed
The capacitor has no electrochemical reaction in the charge and discharge process, and its cycle life can reach more than ten thousand times.
The charging time is short. It's only a few minutes to complete the charge.
High specific power and high specific energy output are realized.
The storage life is long.
The reliability is high. There are no moving parts in super capacitor operation, so there is very little maintenance work.
Environmental temperature has little influence on the normal use. The normal operating temperature range of supercapacitors is - 35~75 C.
It can be used in parallel at any time to increase the capacitance. If the voltage is equalizer, it can be used in series and improve the voltage level.

Aluminum electrolytic capacitors are made of aluminum cylinders, which are equipped with liquid electrolytes and inserted into a bent aluminum strip to make positive electrodes. DC voltage treatment is needed to form a layer of oxide film on the cathode plate. It is characterized by large capacity, but large leakage, poor stability, positive and negative polarity, suitable for power filter or low-frequency circuit. When used, the positive and negative are not connected.

Applicable to frequency converter, electric welding machine, industrial equipment, equipment, frequency conversion cabinet, switch power, industrial control electrical appliances, relay, explosion-proof electrical appliances, high voltage electrical appliances, communication power, automation control, aviation, marine, UPS power, beauty equipment, medical equipment, inverter welding machine, locomotive power, spot welder, elevator, medical equipment Flash lamps, electronic energy saving lamps, electronic rectifiers, electric energy meters, communication products, household appliances, and many other industries.

1. capacity: the capacity design is too small, so that the capacitor can be accelerated and dried up. The service life is greatly shortened.
2. voltage: the actual voltage of the capacitor is generally rated 60%~80%, which is more reasonable.
3. life: voltage, ambient temperature, ripple current, cooling condition and the service life of the capacitor.
4. product installation height: too high can not be installed, too low installation will appear bad contact and terminal stress and other adverse effects, so in the use of terminal abnormal fever, affect the service life of the product.

1. no reverse polarity can be applied and reverse voltage is added. Even if the appearance is not abnormal, the capacitor can not be used, and it has been damaged.
2. no support or external force can be applied to the sealing part, otherwise it will cause bad sealing, and may cause leakage and casing rupture.
3. if the capacitor is struck by falling, the electrical performance of the capacitor will be worse, resulting in failure and the capacitor will not be impacted.
4. do not use any capacitors that have been used in assembly. No capacitors can be used except for capacitors removed for testing electrical properties at regular inspection.
5. the bolt type explosion-proof valve (on the cover plate) please do not move downwards, for fear that the electrolyte and fixative will flow out from the explosion proof valve.
6. there is no wiring circuit near the explosion-proof valve, because the electrolyte is ejected when the explosion-proof valve works.
7. do not install heat sink parts around the capacitor and the reverse side of the circuit board (below the capacitor).
The 8. capacitor is well ventilated in the frequency converter.

ypes of pulping:

It can be divided into two categories: input capacitor explosion and output capacitor explosion.

For input capacitors, I mean C1, C1 filters the current received by the power supply. The input capacitor explosion is related to the quality of the power input current. Excessive burr voltage, high peak voltage, current instability and so on make the capacitor overcharge and discharge too frequently, the capacitance in this kind of working environment for a long time, the internal temperature rises very quickly. Explosion will occur if the limit of the vent is exceeded.

For the output capacitor, the C2 I used to filter the current after being adjusted by the power module. The current has been filtered for a relatively stable time, and the possibility of bursting is relatively small. However, if the ambient temperature is too high, the capacitance is also prone to burst. Detonating, newspaper also. The use of garbage is natural to explode, retribution. He who wants to know the past depends on his present fruit; he who wants to know the future will see his present cause.

There are many reasons for capacitor explosion. For example, the current is greater than the allowable steady wave current, the use voltage exceeds the working voltage, the reverse voltage, and the frequent charging and discharging. But the most direct reason is the high temperature. We know that an important parameter of capacitance is the temperature resistance value, which refers to the boiling point of the electrolyte inside the capacitor. When the internal temperature of the capacitor reaches the boiling point of the electrolyte, the electrolyte begins to boil, the pressure inside the capacitor rises, and the pulping occurs when the pressure exceeds the limit of the vent. Therefore, temperature is the direct cause of capacitance explosion. The design life of capacitance is about 20 thousand hours, and the influence of environmental temperature is also great. The service life of the capacitor decreases with the increase of temperature. The experiment proves that the life of the capacitor will be reduced by half if the ambient temperature rises by 10 degrees. The main reason is that the temperature accelerates the chemical reaction and causes the medium to degenerate with time. In order to ensure the stability of the capacitor, the capacitor must be tested for a long time in the high temperature environment before the plug-in board. Even at 100 degrees, high quality capacitors can work for thousands of hours. At the same time, the life of the capacitor mentioned is that the capacitance of the capacitor will not exceed 10% of the standard range during the use of the capacitor. Capacitor life refers to the problem of capacitance, rather than burst after the arrival of design life. Just can't guarantee the capacitance standard of capacitance design.

Therefore, in a short period of time, the normal use of the plate capacitor will explode slurry, which is the quality of capacitor. In addition, the abnormal usage may also cause capacitor explosion. For example, hot plug computer accessories will also lead to sharp changes in the current and voltage of the local circuit of the card, resulting in the failure of capacitor utilization.