July 17, 2023
Lithium battery is more and more widely used in Lighting nowadays, due to the energy crisis. such as Back up lighting, Solar Lighting. However, the complains emerge frequently in the market from different brand at different levels, that the lifetime of the products is short and the back up time decrease very fast, why is that?
As Backup Lighting Specialist with more than 17 years in lighting, the R&D V.P. of T&P Litech, Mr.Peter Xu pointed out 2 key points:
1.Temperature Management System(TMS)
The best performance of Lithium happens in the interval of working temperature is within 0C~45℃ during discharging. Higher than 60℃ will accelerate the aging of the battery. Sulfur and other organic substances in (SEI) will hydrogenolyze, and producing a large amount of hydrogen gas, which will damage the performance of the battery.
Similarly, low temperature will also damage the reliability of the battery. Lower than -10℃ will cause damage to the performance of the battery, resulting in poor charge and discharge performance, increasing capacity loss, and damage to the structure of the battery. In addition, the low temperature environment will also cause the electrolyte to solidify, affecting charging and emptying.
Therefore, when operating lithium batteries, it is strictly necessary to follow the working temperature between -10℃~60℃, and the ideal working temperature of the battery is between 0C~45C.
2. Battery Management System(BMS)
During the use of lithium batteries, overcharging, over-discharge and over-current will affect the service life and performance of the battery, and in serious cases, the lithium battery will burn and explode.
Let’s take 18650 Lithium battery for example, if the discharging voltage is less than 2.7V, it may cause irreversible attenuation of the battery capacity, and what if discharging voltage reach 0V, yes, unless there is a restore circuit, otherwise the battery will be “starved to death”.
In the LED Backup lighting, BMS is very important part which provide Over-Charging Protection(OCP), Over-Discharging Protection(ODP), Over Current Protection(OCP) ect., which protects the battery in a normal operation condition.
The above two points are the main reasons for customer complaints about emergency lights in the market at present.
As LED Backup Lighting Specialist, T&P is always seeking fundamental solutions for the customer and end-users. According to the characteristics of the Lithium battery and the demand of the market, T&P developed the first emergency light of the thermal management system in China, SIRIUS Emergency lamps, using the advantages of the design to reduce the operating temperature of the battery to 55℃, greatly improving the life and safety of the battery.
At the same time, T&P uses BMS to ensure the safety of emergency lights, and to solve a variety of problems encountered by consumers in use, such as emergency function malfunction, failure to turn off, flashing and other problems.
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