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Wearable Battery Of Equipment And Other Small System Security

Wearable battery of equipment and other small system security
Wearable not only the size of the device is very limited, and as a result require long-term wear, comfort is also important, so they must be very light, so the battery must be as small as possible. Not only that, repeated studies have shown that the IDC and GMI, battery life is consumers buy battery-powered convenient first to consider factors. Therefore, high battery capacity is very important to product success.
Challenges to meet both requirements makes more difficult. Lucky is that many characteristics of lithium-ion batteries to enable them to overcome this challenge, making ideal for wearable device applications.
First, they provide a high energy density, allows system design engineer to select a smaller, lighter battery, and can provide a longer working time. Meanwhile, operating voltage 3.7 v lithium-ion batteries, compared with only 1.2 v Ni-MH or NI-CD batteries. This means that lithium-ion batteries need less batteries (cell), which also contributed to a smaller, lighter system. In addition, they self discharge rate is far lower than the nickel-based batteries, about 2% per month, Ni-MH and NI-CD batteries up to 5% a day. It can not only reduce the number of charging and battery placement can also be used again after a very long time, so as to make the system more convenient for customers to use.
Of course, all technologies have their own shortcomings. For example, the lithium-ion battery manufacturing more complex than nickel-based rechargeable battery, so prices are more expensive. But as a product of mass production, economies of scale and continuous technological improvements is rapidly reducing its cost.
Recent headlines have shown, lithium-ion battery has greater potential security risks. Due to the use of inflammable electrolytes, so if the charging voltage is too high or too low may cause a fire or explosion. However, most lithium-ion batteries have internal protection circuitry, you can to some extent to prevent overvoltage or undervoltage. But lithium-ion batteries the charging process is still more complex than nickel-based rechargeable battery.
Lithium-ion batteries: the convenience of wearable device
A small battery, long battery life, high energy density
Higher voltage means fewer batteries and smaller systems
Slow self-discharge: less charge cycles, ready for use