Soft package super capacitor monomer

Product introduction:

          The utility model relates to a soft packed supercapacitor monomer and a supercapacitor module. The soft packed supercapacitor monomer comprises a shell, an electric core, and a positive guide vane and a negative guide vane respectively connected with the electric core; Wherein, there are more than two groups of shells, and each group of shells is arranged in turn from the inside to the outside; In each group of shells, the innermost shell is a shell, and the thickness of one shell is greater than that of any other group of shells; A housing is wrapped on the outside of the electric core, and both the positive guide vane and the negative guide vane extend from the inside of a housing to the outside of each group of housings; One housing is connected with the positive deflector and the other housing is connected with the negative deflector The utility model provides efficient protection for the occurrence of liquid leakage through the setting of multiple protective structures from inside to outside, thereby significantly enhancing the safety and stability of the super capacitor monomer, thus making the internal monomers of the module fully insulated from each other, more effectively avoiding the corrosion and damage caused by liquid leakage, and extending its service life.

Series specification table:

Series Specification Sheet:

Application areas:

Small energy storage devices, backup power supplies, energy self-sufficient electronic devices in the 5G field, implantable micro-applications, working robots

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=P.T

(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.