Li-ion batteries: news, progress, history and background

Here are all news about latest recall

So far, the fields of Li-ion battery application for the last years enlarge and grab increasingly more market from originally discovered - cell phone application to notebooks, digital camera, PDA etc. This is because of their high energy density (smaller size/weight – higher capacity) and the capacity of the Li-ion cells of the same size has increased by > 7% per each year. Now safety is considered one of the most important features of Li-ion cells. Nearly all electricity consumers demand a high voltage, which is realized by connecting cells in series. Since the single cells have different capacities, it is impossible to maintain the optimal charge voltage in the weakest cell at the end of the charge process. Consequently, the cell voltage increases and, besides the main charging reaction, chemical and electrochemical side reactions are possible. To avoid this problem for lithium-ion batteries consisting out of non-over-chargeable cells, computer-controlled charging systems regulat