Super double-layer capacitor

Product introduction:

       Super double-layer capacitor is a kind of super capacitor and a new type of energy storage device. The double-layer capacitance is between the battery and the capacitance, and its huge capacity can be used as a battery completely. Compared with the battery based on electrochemical principle, the charge and discharge process of the double-layer capacitor does not involve the change of material at all, so it has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and green environmental protection. The distance between the two electric layers of the double-layer capacitor is very small, which makes the withstand voltage very weak, generally not more than 20V, so it is usually used as the energy storage element in low voltage DC or low frequency situations.

Product specification:

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Application field:

● UPS system intelligent electricity meter, intelligent water meter, intelligent flow meter and other instruments and meters

● Backup power supply: RAM, detonator, car recorder, intelligent instrument, vacuum switch, digital camera, motor-driven EVD, computer, car navigator, digital camera

● Energy storage: intelligent three-meter, UPS, security equipment, communication equipment, flashlight, water meter, gas meter, taillight, small household appliances, electric toys, cordless telephone, television, electric rice cooker

● High current operation: electrified railway of automobile industry, smart grid control, hybrid electric vehicle, wireless transmission

● High-power support: wind power generation, locomotive startup, ignition, LED flash lights for electric vehicles, solar power generation, etc

testing method:

   1. Electrostatic capacity test method:

(1) Test principle

    The test of the electrostatic capacity of the supercapacitor is to use the method of constant current discharge of the capacitor, and calculate it according to the formula.

   C=It(U1-U2)

In the formula: C - electrostatic capacity, F;

       I-constant discharge current, A;

      U1, U2 - use voltage, V;

      t-Discharge time required for U1 to U2, S

(2), test procedure

   Charge the capacitor with a current of 100A, charge the capacitor to the working voltage and keep the voltage constant for 10 seconds, then discharge the capacitor with a current of 100A, take U1 as 1.2V and U2 as 1.0V, record the discharge time within this voltage range, and the total cycle Capacitance, take the average value.

2. Stored energy test

  (1) Test principle:

      The test of supercapacitor energy is carried out by the method of discharging the capacitor with constant power to 1/2 of the working voltage with the given voltage range of the capacitor. The output energy W of the capacitor is obtained from the relationship between the constant discharge power P and the discharge time T, namely:

          W=PT

  (2) Test procedure

     Charge the capacitor to the working voltage with a constant current of 100A, and then keep it constant until the charging current drops to the specified current (10A for traction type, 1A for start-up type), after 5 seconds of rest, discharge the capacitor with constant power to 1/2 of the working voltage, record Discharge time and calculate magnitude. Repeat the measurement 3 times and take the average value.

3. Equivalent series resistance test (DC)

  (1) Test principle

    The internal resistance of the capacitor is measured according to the sudden change of the voltage within 10 milliseconds of the capacitor disconnecting the constant current charging circuit. That is: in the formula:

     R - the internal resistance of the capacitor;

     U0 - capacitor cut off the voltage before charging;

     Ui - cut off the voltage within 10ms after charging;

     I - cut off the current before charging.

 (2) Measurement process

    Charge the capacitor with a constant current of 100A, disconnect the charging circuit when the charging working voltage is 80%, use a sampling machine, record the voltage change value within 10 milliseconds after the capacitor is powered off, and calculate the internal resistance, repeat 3 times, and take the average value.

4. Leakage current test

   After charging the capacitor to the rated voltage with a constant current of 100A, charge the capacitor with a constant voltage for 30min at this voltage value, and then leave it open for 72h. During the first three hours, the voltage value was recorded every minute, and during the remaining time, the voltage value was recorded every ten minutes.

  Calculate the self-discharge energy loss, SDLF=1-(V/VW)2, and the calculation time points are: 0.5, 1, 8, 24, 36, 72h.

   Note: The voltage tester must have high input impedance to minimize the impact of discharge.

超级电容优点：

1.具有法拉级的超大电容，比普通电容器大得多。

2.可以立即释放的功率是普通电池的近十倍，并且不会损坏。

3.充电和放电循环寿命超过30000-100,000次，这是最大的优势之一。传统电池只能充电和放电数百次。

4.可以在40至60度的环境温度下正常使用，在低温下传统电池的性能会大大降低。

5.具有超强的电荷保持能力，漏电很小，传统电池需要经常充电以保持状态。

6.充电速度快，其速度是普通电池的数十倍，并且可以在几分钟内为汽车所需的电量充满电。

7.它不会对环境本身造成污染，并且真正免维护，而传统电池仍然受到污染。

产品性能表：