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Another type of thermal switch is a PTC (Positive Temperature Coefficient) thermistor; these thermistors have a "cutting off" temperature at which the resistance suddenly rises rapidly, limiting the current through the circuit. When used in conjunction with a thermistor relay, the PTC will switch off an electrical system at a desired temperature.
The cut-off voltage is different from one battery to the other and it is highly dependent on the type of battery and the kind of service in which the battery is used. When testing the capacity of a NiMH or NiCd battery a cut-off voltage of 1.0 V per cell is normally used, whereas 0.9 V is normally used as the cut-off voltage of an alkaline cell ...
In the mid-2000s and to further answer critics, manufacturers once again evolved the leaf blower, with the use of NICad (nickel-cadmium) powered tool design to create the first cordless leaf blower. The new NiCad battery-powered leaf blower designs were further improved by way of the more powerful, and longer run time lithium-ion batteries ...
The battery pack also contains a variety of temperature, voltage, and current sensors. Collection of data from the pack sensors and activation of the pack relays are accomplished by the pack's battery monitoring unit (BMU) or BMS. The BMS is also responsible for communications with the vehicle outside the battery pack. [94]
A battery electric vehicle, its name, stylised as LEAF, serves as a backronym to "leading environmentally-friendly affordable family car." It is the world's first series-produced battery electric automobile and has been offered exclusively as a five-door hatchback. The Leaf—Nissan's second battery-electric automobile—debuted on 2 August 2009.
Initially, the Leaf was available exclusively with a large battery pack composed of 192 flat, laminated lithium-ion cells developed in collaboration with NEC, which offers advantages such as simplified design, efficient cooling, and optimal packaging. The battery pack is located under the floor and between the wheels, optimising the vehicle's ...
The tests require engine manufacturers to carry out at least two tests of the engine, to make sure that the engine can survive a compressor or fan blade breaking off within the engine and a turbine blade breaking off within the engine, without fragments being thrown through the outside enclosure of the engine, creating a contained engine failure.
The leaves will be “severely distorted, asymmetrical, cupped and puckered, and exhibit acute dentations”, these symptoms tend to look like a fan, hence the name fanleaf virus. The canes may also show signs of abnormal branching, double nodding, and short internodes.