By Peter Goodwin
Книга Anatomy of the send - The ARMED delivery BOUNTY Anatomy of the send - The ARMED delivery BOUNTY Книги Вооружение Автор: Peter Goodwin Год издания: 1988 Формат: pdf Издат.:Conway Maritime Press Страниц: one hundred and one Размер: 12.97 Mb Язык: Русский0 (голосов: zero) Оценка:
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Extra info for Anatomy of the Ship - The ARMED TRANSPORT BOUNTY
A 100 amp-hour battery at 100% of capacity provides only 65 amp-hours if you discharge 65 amps in one hour. The faster you discharge a battery the less capacity the battery provides. The discharge rate is a factor in determining how much battery capacity is available. 22 Managing 12 Volts • When you pull into a gas station, you refill the fuel tank at the maximum pressure the fuel hose allows. If you recharge a battery to more than 75% at the maximum output of a high output charging device, the battery can become very hot and give off hydrogen and oxygen.
49 volts Power at the load 2566 watts 12 watts You will notice the voltage drops to about 11 volts when the battery supplies high amperage to the starter motor. You can observe this voltage drop when starting an engine because the vehicle lights dim. What causes this voltage drop is the high amount of current through the battery internal resistance. Even through the internal resistance is extremely low, perhaps a few thousandths of an ohm, the high current required by the starting motor flowing through the battery causes a voltage drop, lowering the voltage the battery can supply to the load.
During charging, the battery becomes warm because the battery internal resistance and the chemical reaction release heat. During discharge, the internal resistance still produces heat, but the loss is balanced by heat absorption during the chemical reaction. A battery does not feel as warm on discharge as on charge even though the battery is being discharged at the same rate as when charged. Nevertheless, heat and energy are being lost both during charging and discharging, resulting in inefficiency.