Battery Manufactory

Recently, at the 2020 Forum of Hundreds of People's Association, according to BYD's chairman, BYD will develop a new lithium iron phosphate battery, which will increase the energy density of battery packs by 50%, and will be mass produced for the first time this year. Why is it called a "blade battery"? Blade batteries are named according to their shape. Because batteries are more flat and elongated than traditional square batteries, they are called blade batteries. The so-called "blade battery" is actually a large battery cell longer than 0.6 m developed by BYD, arranged together in an array, and inserted into the battery pack like a "blade". On the one hand, it can improve the space utilization rate and energy density of the power battery pack; on the other hand, it can ensure that the battery cell has a sufficiently large heat dissipation area, and can conduct internal heat to the outside, thereby matching higher energy...

Electronics are showing up everywhere: on our laps, in pockets and purses and, increasingly, snuggled up against our skin or sewed into our clothing. But the adoption of wearable electronics has so far been limited by their need to derive power from bulky, rigid batteries that reduce comfort and may present safety hazards due to chemical leakage or combustion. Now Stanford researchers have developed a soft and stretchable battery that relies on a special type of plastic to store power more safely than the flammable formulations used in conventional batteries today. "Until now we haven't had a power source that could stretch and bend the way our bodies do, so that we can design electronics that people can comfortably wear," said chemical engineer Zhenan Bao, who teamed up with materials scientist Yi Cui to develop the device they describe in the Nov. 26 edition of Nature Communications. The use of plastics, or polymers, in batteries is not new. F...

Lithium-ion batteries are in everything from cell phones to cars. However, recent incidents involving fires or explosions of these devices show there's a need for safer batteries. One option is to replace the flammable liquid electrolyte with a solid-state electrolyte (SSE). But some of the most-studied SSEs are themselves flammable, leaving the original safety concern unaddressed. Researchers now report in ACS' Nano Letters that they have developed an SSE that won't burn up. Traditional lithium-ion batteries consist of a cathode and anode, separated by a liquid electrolyte and a thin piece of porous plastic. If the battery is damaged -- for example, if it is overcharged or if needlelike lithium projections grow and pierce the plastic separator -- the electrolyte can catch fire. Scientists have experimented with a variety of solutions, such as adding fire retardants to the electrolyte, or replacing the soft and flammable separator and electrolyte with...