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electrical:12v:deep_cycle_battery [2020/06/19 11:21] frater_secessus [Gel cell] |
electrical:12v:deep_cycle_battery [2020/11/14 13:28] frater_secessus [Non-LiFePO4 lithium-ion] |
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==== Gel cell ==== | ==== Gel cell ==== | ||
- | This type of VRLA battery gelatinizes the electrolyte with SiO2 (silicon dioxide) to stabilize it. While renowned for their duty cycles, they are rarely used in campers due to cost, limited charging max similar to flooded((C/ | + | This type of VRLA battery gelatinizes the electrolyte with SiO2 (silicon dioxide) to stabilize it. While renowned for their duty cycles, they are rarely used in campers due to cost, limited charging max similar to flooded((C/ |
- | "Lead crystal" | + | "Lead crystal" |
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* voltage mismatch of 3S to nominal 12v systems | * voltage mismatch of 3S to nominal 12v systems | ||
+ | ===== health ===== | ||
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+ | Batteries are typically replaced when they can no longer provide 80% of their rated capacity. | ||
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+ | Because of this, we use indirect methods to assess battery health. | ||
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+ | > Quickly rising to absorption voltage during bulk and never seeing tail current drop down to previous levels are good indicators that the battery is in a declined or seriously declining state. | ||
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+ | Tail current (aka endAmps, finishing amps) for healthy lead batteries is typically between C/200 and C/100 (0.5A to 1.0A at Vabs for per 100Ah of capacity). | ||
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+ | The rise to absorption voltage is rarely useful in the field since: | ||
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+ | - solar charging alone is rarely able to hit charge current maximums | ||
+ | - alternator charging is rarely able to hit Vabs | ||
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+ | People charging off larger [[: | ||