
A battery management system (BMS) is any electronic system that manages a ( or ) by facilitating the safe usage and a long life of the battery in practical scenarios while monitoring and estimating its various states (such as and ), calculating secondary data, reporting that data, controlling its environment, authenticating or it. A Battery Management System (BMS) monitors cell voltage, temperature, and state of charge while providing protections against overcharging, over-discharging, short circuits, and thermal runaway. [pdf]
The high power density of Lithium-Ion batteries has made them very popular. However, the unstable behavior of Lithium-Ion cells under critical conditions requires them to be handled with care. That means a Battery Management System (BMS) is needed to monitor battery state and ensure the safety of operation.
Protection methods are required in Battery Management Systems (BMS) to maintain the safety, dependability, and lifetime of the battery system. These safeguards keep the battery from running in situations that might cause irreversible damage, loss of efficiency, or safety issues.
It is also the responsibility of the BMS to provide an accurate state-of-charge (SOC) and state-of-health (SOH) estimate to ensure an informative and safe user experience over the lifetime of the battery. Designing a proper BMS is critical not only from a safety point of view, but also for customer satisfaction.
The essential parts of BMS are overvoltage and undervoltage protection mechanisms. The active monitoring of battery voltage is the first checkpoint. With the help of voltage sensors, the battery’s voltage is constantly monitored and the data is sent to the BMS, and after this, the correct actions are taken by BMS which is based on the readings.
On the other hand, a stationary energy storage-focused Battery Management System (BMS) might emphasize stability and durability more than high performance periods, prompting over-current protection mechanisms at lower levels.
Battery Management Systems are vital cogs in the complex machinery of modern automotive systems, particularly in electrically powered vehicles.

Arirang (Korean: 아리랑) is a line of North Korean Android smartphones. They were announced on 10 August 2013. The phone was distributed to local sales points operated by mobile operators such as Koryolink to be sold together with 3G SIM cards or as a stand-alone device. It is named after the "Arirang" Korean. . In 2013, toured a factory called the "May 11 Factory" that makes the "Arirang" . In the August of same year, first Arirang was released and was claimed to the first domestically produced smartphone. . • • • [pdf]
North Korea's government only allows its citizens to use smartphones it created to monitor and control them. While we can't get hold of them here, there's plenty of information available that gives us a fascinating look into the world of North Korean smartphones. Smartphones were introduced to North Korea in 2002, then banned from 2004 to 2008.
The new report catalogs 55 smartphones that have been sold in North Korea, with specifications and other information where available. View and download a copy of the full report at Lumen. In this new report, Martyn Williams examines smartphones, the smartphone market, and wireless networks in North Korea.
One trend noted in recent years is that North Korean smartphone brands appear to have begun offering several versions of a phone with differing specifications. This mirrors the strategy of companies like Apple and Samsung with their flagship products.
These smartphones from North Korea are more than just messaging devices; they act as systems for oversight. Two built-in applications called ‘Red Flag’ and ‘Trace Viewer’ guarantee that the state monitors all device activities. The program Red Flag observes the phone software to stop any illicit changes from happening.
Recent reports say digital payment apps have also been enthusiastically adopted despite their potential for additional surveillance of citizens. One trend noted in recent years is that North Korean smartphone brands appear to have begun offering several versions of a phone with differing specifications.
A glimpse of a North Korean phone with a built-in mosquito repellant. There's also a Google Drive icon that opens a screensaver app. It's hard to confirm these phones' details reliably. Some specifications here are sourced directly from the DPRK state media, so take those with a bucketload of salt.
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