By Harold Barre
The best way to improve, function and troubleshoot 12-volt platforms with emphasis on figuring out what should be improper with a process and the way to enhance it with a multi-stage charging approach. first-class diagrams, transparent, concise writing.
Read or Download Managing 12 Volts: How to Upgrade, Operate, and Troubleshoot 12 Volt Electrical Systems PDF
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Extra resources for Managing 12 Volts: How to Upgrade, Operate, and Troubleshoot 12 Volt Electrical Systems
The following sections of this chapter explain how the battery functions and what effect temperature, discharge, and charging rates have on a battery's usefulness. A knowledge of how a battery works is extremely beneficial in explaining why a battery may not always react as you think it should. If you can comprehend how the battery functions, you will understand what type of battery, charging device, and monitors are best for your situation. The rest of the book builds on this knowledge. HOW BATTERIES WORK A battery does not store electrical energy but converts chemical energy into electrical energy by electrochemical reaction.
The higher the reserve capacity the greater the amp-hours a battery holds. A 6 volt golf cart battery uses 75 amps as the discharge rate, and not 25 amps. A 6 volt battery with a peak capacity of 107 minutes provides 133 amp-hours (75 amps x 107 minutes = 8025 amp-minutes or 133 amphours). 5 volts. This test is conducted at 80°F. The same battery that provides 66 amp-hours using the reserve capacity rating has a capacity of 100 amphours when the 20 hour rating is used. The reason is the 20 hour rating discharges the battery using about 5 amps, and the reserve capacity rating discharges the battery using 25 amps.
36 Managing 12 Volts THE CHARGING VOLTAGE MUST BE GREATER THAN 13 VOLTS When charging a battery, the charging device voltage must be higher than that of a fully charged battery. If the battery and the charging device have the same voltage, no current will flow to recharge the battery. If the battery voltage is higher than that of the charging device, current is from the battery to the charging device and the battery is discharged. If the charging device voltage is higher than that of the battery, current is from the charging device to the battery and the battery is charged.