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Showing posts from May, 2017

Lithium-ion batteries in parallel charging

Aims to increase the capacity of the lithium-ion batteries in parallel, therefore, parallel charging lithium-ion batteries compared with single  lithium ion battery  with different design features, mainly on the consistency in design and parallel battery charging current. Characteristics of lithium-ion batteries in parallel are: constant voltage, battery capacity addition, resistance decreases battery life extended. Parallel charging is the core content of the size and role of the current. According to the theory , current is equal to the current of each branch and, therefore, have been combined as the battery   n   parallel  li ion battery  to achieve with the same single-cell charging efficiency, charging current for a number of current lithium-ion batteries, and Ohm's law: I=U/R   under the formula, the design is reasonable. However, the parallel battery internal resistance will also change according to the parallel resistance formula, two parall...

Lithium battery explosion caused by the internal structural design

Panic caused by  lithium ion battery  cell phone explosion is always the thing after the terror, global brands including Dell, Apple has a similar embarrassment. This makes people think: lithium battery explosion was inevitable right? Is used in cell phones, laptops and other lithium-ion battery, called the lithium-ion battery is fulfilled by the movement of lithium ions between the positive and negative power supply and release of the device, it calls lithium ion can be attached when the shuttle between the positive and negative factors affecting the clean movement. In theory, this design is possible, but in practice, due to extremely powerful lithium-ion batteries are sensitive products, any abnormal conditions can cause problems with the battery. All lithium battery explosion is caused by a short circuit, causing short-circuiting has overcharge, discharge, over current, over heat, which is formed through the internal structure of lithium-ion batteries battery short cir...

Lithium-ion batteries, capacitors and lithium ion capacitor

Japan's Fujitsu Company set up a capacitor business promoting room, its Chief named LingMuJingSheng recently wrote a universal knowledge of lithium ion capacitor and with lithium-ion batteries and electric double-layer capacitors compared the features. Fujitsu develops lithium-ion capacitor is characterized by high output power, charge and discharge cycle characteristics of excellent, high power is needed, mainly for the hybrid car field. 1   .Self-comparison of discharge, voltage, capacity, Lithium ion capacitor with the lithium-ion battery material differences mainly in the positive. The cathode of lithium ion capacitor is activated carbon; this is different from   lithium ion battery   lithium oxide. 2   .Safety: lithium battery replace the nickel-metal hydroxide batteries and lead acid batteries is a great progress in battery technology, but safety of lithium-ion batteries also have occurred, as noted above, this is caused by their different cathode stru...