1. After the supercapacitor is discharged, the ER battery will charges the supercapacitor. How long does the supercapacitor to be fully charged? LSC and ER are connected in parallel and are charged by the voltage difference between them. When there is a voltage difference between them, the ER charges the LSC. The charging time depends on different discharge depths, different ER models and LSC models. According to the test data, if the LSC14250 reaches to 50% discharge depth, it will take 2 hours to be fully charged.
2. What is the self-discharge of the super capacitor?
For model LSC14250: self-discharge at RT < 1μA
self-discharge at 80 ° C
< 3μA
For model LSC14505: self-discharge at RT < 5μA self-discharge at 80 ° C < 15μA 3. At 25 ° C, the self-discharge rate of the ER battery per year is 1%. After adding the super capacitor to the ER battery, What is the self-discharge rate of this ER battery ? Take ER26500 for example, the super capacity is 9Ah, the self-discharge rate is 1% per year, that is 90mAh.
If ER26500 is connected with LSC14250 in parallel, the leakage current for 1 year is 1 * 24 * 365/1000 = 8.76mAh,
The total leakage capacity is 98.76mAh, so the overall self-discharge rate is 98.76 / 9000 ≈ 1.1%
The data will be different for different ER models.
4. At high temperatures, the self-discharge of the ER battery will increase. Does the self-discharge of the supercapacitor increase at high temperature? Yes, high temperature would accelerate the chemical reaction inside the capacitor and increase the leakage current. Thus the self-discharge of the supercapacitor would increase.
5. Could the super capacitor could normally store and work at high temperature of 60°C or even at 80°C ? For IoT application, there is no problem. If there is continuous high current discharge, it would have safety issues.
It should be particularly noted that our LSC series capacitor will be superior to similar products at high temperatures. As the lid structure is glass-to-metal seal, It will not be easily aging and leakage as the ordinary plastic materials.
6. Is there the safety hazards after ER battery adding the supercapacitor? Is there a possibility of an explosion? Is it possible to work above 65 degrees for a long time? Even 70 degrees or 85 degrees? The combination of ER battery + LSC supercapacitor would not bring new security risks. Long-term high temperature would accelerate the aging of ER batteries, leading to passivation, which may affect the discharge function of the battery bank.
7. Super-Capacitors could be stored separately? Does it need to be fully charged? If the super-capacitor store for a year to be found non-capacity, will it be completely destroyed, or just loss of capacity? Can the super-capacitor be stored for a long time? The storage performance of LSC super-capacitor is similar to lithium batteries, so it can be stored separately. Store for half or full capacity are both ok. If the super-capacitor store so long as to the voltage lower than 2.5V, it would cause the damage of the LSC. So as long as the voltage of LSC is between 2.5 and 4.0V, it could be stored for a long time.
8. What's cut-off voltage of ER battery +LSC super capacitor? What will happen if the discharge voltage reaches to 2V or below 2V? The cut-off voltage of ER battery + LSC super capacitor is 2.5V. Below 2.5V, LSC will be over-discharged, resulting in irreversible capacity loss of LSC. Over-discharging for a long time may cause short of internal pole piece, even explosion and caught fire.
