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electrical:batterycide [2021/06/03 12:36]
frater_secessus [murdering flooded lead-acid] |
electrical:batterycide [2024/07/17 21:41] (current)
frater_secessus [Battery murder] |
| ====== Battery murder ====== | ====== Battery murder ====== |
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| //Battery murder// (or //Batterycide//) is the murder of batteries by newbs (new users), poor quality chargers, etc. The term is commonly used by SternWake: //"my goal here is to prevent batterycide."//((http://www.cheaprvliving.com/forums/Thread-Intro-Solar-Questions?pid=192042#pid192042)) | //Battery murder// (or //Batterycide//) is the murder of batteries by abuse, misuse, inappropriate charging, etc. The term is commonly used by SternWake: //"my goal here is to prevent batterycide."//((http://www.cheaprvliving.com/forums/Thread-Intro-Solar-Questions?pid=192042#pid192042)) |
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| It is so common for new RVers to wreck their first set of house batteries that some recommend using cheap [[electrical:12v:deep_cycle_battery#chain_store_batteries|wally world batteries]] as sacrificial lambs to the learning process.((http://www.cheaprvliving.com/forums/Thread-Putting-together-system?pid=176052#pid176052)) As the RVers learns more and gets charging set up correctly they would invest in better quality batteries and have them last several years. | It is so common for new RVers to wreck their first set of house batteries that some recommend using cheap [[electrical:12v:deep_cycle_battery#chain_store_batteries|wally world batteries]] as sacrificial lambs to the learning process.((http://www.cheaprvliving.com/forums/Thread-Putting-together-system?pid=176052#pid176052)) As the RVers learns more and gets charging set up correctly they would invest in better quality batteries and have them last several years. |
| * discharging too deeply. Discharge with lead-chemistries is typically limited to 50% [[electrical:depth_of_discharge|depth of discharge]] as a compromise between cycle life and bank size. | * discharging too deeply. Discharge with lead-chemistries is typically limited to 50% [[electrical:depth_of_discharge|depth of discharge]] as a compromise between cycle life and bank size. |
| * allowing the cells to get low on distilled water. Check them 1x/month or so until you learn their personality. | * allowing the cells to get low on distilled water. Check them 1x/month or so until you learn their personality. |
| | * exposing them to heat, as in an engine bay |
| |
| ===== murdering AGM ===== | ===== murdering AGM ===== |
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| * overvoltage. [[electrical:12v:lifepo4_batteries_thread|13.8v is a safe upper limit]] without BMS and will charge the bank completely. Some experienced folk use slightly higher voltages for faster charging but it must be terminated quickly as the bank approaches 100% state of charge. Exception: Lithium banks with BMS typically overcharge intentionally to balance cells. The overcharge is consumed by resistors and does not actually go into the cell. | * overvoltage. [[electrical:12v:lifepo4_batteries_thread|13.8v is a safe upper limit]] without BMS and will charge the bank completely. Some experienced folk use slightly higher voltages for faster charging but it must be terminated quickly as the bank approaches 100% state of charge. Exception: Lithium banks with BMS typically overcharge intentionally to balance cells. The overcharge is consumed by resistors and does not actually go into the cell. |
| * long periods of 100% state of charge; cease all charging at 100% and only charge that high if you know some loads will be applied immediately. Lithium chemistries do not care about partial state of charge so use that to your advantage. | * long periods of 100% state of charge; cease all charging at 100% and only charge that high if you know some loads will be applied immediately. |
| | * IF you're storing the van or know you're not going to be using the batteries for more than a couple days, it's strongly recommended to leave lithium batteries at 50-80% SOC. Lithium chemistries do not care about partial state of charge, and actually prefer it.. |
| * exposure to high heat | * exposure to high heat |
| * attempting to charge at below freezing | * attempting to charge at below freezing |
