Battery Basics Everyone Should Know phần 5 doc

... nickel-based battery discharges 10 to 15 percent of its capacity in the first 24 hours after charge, followed by 10 to 15 percent every month thereafter. The self-discharge on the Li-ion battery ... single-cell Li-ion battery cuts off at Chapter 8: Choosing the Right Battery What causes a battery to wear down — is it mechanical or chemical? The answer is ‘both’. A battery is...

Ngày tải lên: 07/08/2014, 23:20

... 0°C (32°F) 25 C (77°F) 40°C (104°F) Voltage limit on recharge 2 .55 V/cell 2.45V/cell 2.35V/cell Continuous float voltage 2.35V/cell or lower 2.30V/cell or lower 2.25V/cell or lower ... discharged battery should be charged at 0.1C. Charging a battery with a copper shunt at the 1C rate would cause excessive heat. Such a battery should be removed from service. Discharg...

Ngày tải lên: 07/08/2014, 23:20

... 7.5Wh 24Wh 8.6Wh 6.3Wh Cycle life 150 0 50 0 250 50 0 10 Cost per battery (ref. only) $50 $70 $50 $100 $6.00 Cost per kWh ($US) $7 .50 $18 .50 $8 .50 $24.00 $ 95. 00 Figure 17-2: Energy and cost ... pack) Li-ion 18 650 Cell Reusable Alkaline AA Cell Capacity 600mAh 1000mAh 2000mAh 1200mAh 1400mAh 1 Battery Voltage 7.5V 7.5V 12V 7.2V 7.5V Energy per cycle 4.5Wh 7...

Ngày tải lên: 07/08/2014, 23:20

... Milli-Ohm Battery Voltage Ranking 75- 150 mOhm 3.6V Excellent 150 - 250 mOhm 3.6V Good 250 - 350 mOhm 3.6V Marginal 350 -50 0mOhm 3.6V Poor Above 50 0mOhm 3.6V Fail Figure 9-9: Battery ... discharge of a battery rated at 50 0mAh is 50 0mA. In comparison, a 2C discharge of the same battery is 1000mA. A GSM phone powered by a 50 0mA battery that draws 1.5A...

Ngày tải lên: 07/08/2014, 23:20

... date, expiry date (time to service the battery) , battery capacity a illustrates such a label. 11-3: Sample battery label. The battery label keeps track of the battery in the same way a service ... Li-ion battery cool. Prevent storage in a hot car. Never freeze a battery. • If your laptop is capable of running without a battery and fixed power is used most of the time, rem...

Ngày tải lên: 07/08/2014, 23:20

... Three Knowing Your Battery Chapter 14: Non-Correctable Battery Problems Non-correctable battery problems are those that cannot be improved through external means such as giving the battery ... measure the impedance, a battery must be at least 50 percent charged. An empty or nearly empty battery exhibits a high internal resistance. As the battery reaches 50 percent SoH, t...

Ngày tải lên: 07/08/2014, 23:20

... (134hp) 50 00 h $0.07 $0.10 Fuel Cell $3,000 – 7 ,50 0 $0. 35 - for portable use 2000 h > $1. 85 – 4.10 - for mobile use 4000 h > $1.10 – 2. 25 - for stationary use 40,000 h > $0. 45 – 0 .55 ... NiCd for portable use $7,000, based on 7.2V, 1000mAh at $50 /pack 150 0 h, based on 1C discharge $0. 15 for electricity $7 .50 Gasoline Engine for mobile use $30, bas...

Ngày tải lên: 07/08/2014, 23:20