Cell-level temperature measurement using optical technology
Development of a solution to shut down equipment in case of overheating
Cooling and air conditioning adjustment service provided during shutdown
On the 29th of last month, LS Electric developed BTS (Battery Temperature Sensing). BTS utilizes optical technology to measure battery temperature in real time, down to the cell level, and then shuts down ESS operation if overheating occurs.

LS Electric's BTS utilizes specially designed optical fibers to measure temperature at the cell level within the module, preventing interference with electrical and electronic devices. This allows for continuous temperature measurements at 30cm intervals, enabling more precise and rapid monitoring of overheating zones. The three-dimensional temperature distribution within the battery module allows for precise pinpointing of the actual overheating point, and cell replacement alone can prevent further overheating. This significantly reduces the burden of equipment replacement.

BTS starts monitoring based on the optimal set temperature (room temperature 25℃) for normal battery operation, and issues an 'alarm' or 'danger' warning just before 40℃, when abnormal signs appear, and then forcibly stops the operating system to prevent fire due to overheating and damage to battery modules and cells.

Additionally, ESS efficient operation is possible by detecting minute temperature changes. In the event of an ESS shutdown due to battery overheating, the customer can immediately restart the cooling/air conditioning system remotely to quickly resume operation.

In addition, the temperature rise due to excessive charging and discharging of batteries is considered one of the causes of ESS fires, and after a series of fire accidents, the government recommended limiting battery output to 80% or less. However, if BTS is installed, it is possible to immediately detect overheating at a specific point and output at 90% as before.

An LS Electric official said, “The market is rapidly shrinking due to a series of ESS fire accidents, so we developed a solution to prevent fires caused by rising facility temperatures,” adding, “We hope that this technology will be widely expanded and the entire market will be revitalized as it is capable of protecting ESS facilities and operating them efficiently.”