- Cname：Double layer supercapacitor
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- Release date:2022-03-21 15:15:41

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**Product Name: Shenzhen Gold Capacitor 5.5V4.0F H Type **

Farad capacitors , also known as electric double-layer capacitors , gold capacitors, andsupercapacitors , are chemical components developed in the 1970s and 1980s. SupercapacitorssupercapacitorsThe difference between the amount of Farad capacitors and ordinary capacitors is firstly the difference in capacity. The capacity of ordinary capacitors is 10,000 to 40,000 microfarads, and the capacity of supercapacitors can reach thousands of farads, 1 farad = 1 million microfarads, so super capacitors are also called farad capacitors.

Farad capacitors, also known as electric double-layer capacitors , gold capacitors, and supercapacitors, are chemical components developed in the 1970s and 1980s. Supercapacitors store energy through polarized electrolytes, but no chemical reaction occurs, and the energy storage process is reversible, which is why supercapacitors can be repeatedly charged and discharged hundreds of thousands of times.

The difference between the amount of Farad capacitors and ordinary capacitors is firstly the difference in capacity. The capacity of ordinary capacitors is 10,000 to 40,000 microfarads, and the capacity of supercapacitors can reach thousands of farads, 1 farad = 1 million microfarads, so super capacitors are also called farad capacitors.

Farad capacitors belong to electric double layer capacitors. It is the largest type of electric double layer capacitors that have been put into mass production in the world. The basic principle is the same as other types of electric double layer capacitors, which are composed of activated carbon porous electrodes and electrolytes. The electric double layer structure achieves super-large capacity

1) The charging speed is fast, charging for 10 seconds to 10 minutes can reach more than 95% of its rated capacity;

(2) The cycle life is long, the number of deep charge and discharge cycles can reach 10,000 to 500,000 times, there is no "memory effect", and there is no problem of excessive discharge;

(3) Super high current discharge capacity, high energy conversion efficiency, small process loss, high current energy cycle efficiency ≥ 90%;

(4) The power density is relatively low, about 2W/KG~3W/KG, which is equivalent to 1/5~1/10 of the lead-acid battery;

(5) The raw material composition, production, use, storage and dismantling process of the product are free of pollution, which is an ideal green power source;

(6) The charging circuit is simple, no charging circuit like a rechargeable battery is needed, and it is maintenance-free for long-term use;

(7) Good ultra-low temperature characteristics, wide temperature range -40℃～+70℃;

(8) The detection is convenient, and the remaining power can be directly read out;

(9) The capacity range is usually 0.01F--3000F, and the withstand voltage is often low (a few volts to more than ten volts, and the newly developed ones are only more than twenty volts).

Supercapacitors can be made into supercapacitor modules , which are suitable for high-capacity requirements.

The withstand voltage of supercapacitors is not high. In actual use, an overvoltage protection circuit is essential. Some people often connect two or more supercapacitors in series to access the high voltage environment. This approach is wrong. Because with the leakage of the capacitor, and the quality of the capacitor is not the same, it is easy to cause the phenomenon of partial unit overcharge and breakdown after multiple charging and discharging in the later stage.

After all, supercapacitors are not batteries, and there is a problem that the voltage gradually decreases with discharge, so a more complex output circuit is required

The low impedance of farad capacitors is essential for many of today's high power applications. For fast charge and discharge, the small ESR of the farad capacitor means more power output.

Instantaneous power pulse applications, short-term power support for important storage and memory systems.

Application examples

1) Quick charge application, charge in seconds and discharge in minutes. Such as power tools, electric toys;

2) In UPS systems, supercapacitors provide instantaneous power output as a supplement to backup power for engines or other uninterrupted systems;

3) Applied to energy sources with sufficient energy and lack of power, such as solar energy;

4) Power support when the bus is switched from one power source to another;

5) Small current, continuous discharge for a long time, such as computer memory backup power supply.

Product Specifications:

model | Rated voltage V | Capacity F | Internal resistance mΩ1KHz | 24h leakage current uA | Product Size | ||

Diameter D±0.5 (mm) | Length H±0.5 (mm) | Pitch ±0.5 (mm) | |||||

SCE5R5H104 | 5.5 | 0.1 | 50 | 5 | 11.5 | 4.5 | 11 |

SCE5R5H224 | 5.5 | 0.22 | 40 | 5 | 11.5 | 4.5 | 11 |

SCE5R5H334 | 5.5 | 0.33 | 40 | 8 | 11.5 | 4.5 | 11 |

SCE5R5H474 | 5.5 | 0.47 | 20 | 8 | 11.5 | 4.5 | 11 |

SCE5R5H105 | 5.5 | 1.0 | 15 | 10 | 19.5 | 6.5 | 19.5 |

SCE5R5H476 | 5.5 | 1.5 | 10 | 10 | 19.5 | 6.5 | 19.5 |

SCE5R5H477 | 5.5 | 4.0 | 10 | 15 | 24.8 | 6.7 | 24.8 |

Product Size:

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.