SilverPigeon
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- Thread starter
- #1
Preamble:
Previous 3 BMS resets over a period of months, when at home, always on NOCO10 charger, sometimes all week; charger reports Green light (top-off/maintenance mode). Previous issues:
- No crank: 1
- "System off to save battery": 9
- Battery fail / won't hold charge on NOCO10: 3 (latest on 2 May 2024)
Example: Previous Melbourne trip, 342km return, cannot get better than 60's% SOC before truck puts 0A into battery
28/5/24 12:30 After all-night charging in truck, disconnected battery from truck, ran battery test, results (1), (2), (3):
- Volts: 12.50
- CCA measured: 670
- CCA Rating: 760
- Resistance: 4.50 mΩ
- SOH: 89%
- SOC: 88%
28/5/24 12:50 Leaving battery disconnected, charging with NOCO10, started different behaviour; instead of progressing straight through the charge lights, it gets to 3 lights (orange) and goes back to one light (small red). NOCO10 showed Green light after approximately an hour. Left battery disconnected from truck and charging with NOCO10 overnight.
29/5/24 09:30 Re-ran battery test (disconnected from truck), results (4), (5):
- Volts: 12.72
- CCA measured: 675
- CCA Rating: 760
- Resistance: 4.47 mΩ
- SOH: 90%
- SOC: 100%
29/5/24 10:00 Re-connected battery to truck, verified all truck settings and FORScan mods, changed Target SOC from 103% back to 90%, performed BMS reset. This was all done engine-off but connected to charger and left on charger until:
29/5/24 13:00 Test drive results:
- Start of ½ hour drive away (6)
- ½ hour in the gun shop ?
- End of ½ hour drive back (7)
Lessons learned:
1. The NOCO10 charger works perfectly
2. The Ancel battery tester works as advertised
3. Even though my truck sat turned off from Feb '23 to Nov '23 (with a handful of starts for shipping, conversion etc.) the battery was actually good (but low SOC) through all that time
4. Even when truck is asleep, the BMS strategy still prevents a full external charge
5. For a full charge and reliable battery test, the battery must be disconnected from the truck
6. The Ford PID for battery SOC% and current are only reporting what the BCM (via the BMS) is telling it, which is not necessarily the disconnected SOC% of the battery
7. A longer driving day will confirm or deny maintenance of SOC, but I'd feel better once I've got the BMS strategy updated. The original SOC level is the cause of the issues I noted at the top of the post, and likely either came from the battery manufacturer that way, or SOC sank during many months of engine-off. It never got better, likely because the battery never got an "out of truck" charge and BMS reset combination.
Conclusion: before going through the hassle of dealer testing and replacement, charge your H6 "out of truck" for 24 hours and BMS reset; get a cheap battery tester like the Ancel and charger like the NOCO10.
Previous 3 BMS resets over a period of months, when at home, always on NOCO10 charger, sometimes all week; charger reports Green light (top-off/maintenance mode). Previous issues:
- No crank: 1
- "System off to save battery": 9
- Battery fail / won't hold charge on NOCO10: 3 (latest on 2 May 2024)
Example: Previous Melbourne trip, 342km return, cannot get better than 60's% SOC before truck puts 0A into battery
28/5/24 12:30 After all-night charging in truck, disconnected battery from truck, ran battery test, results (1), (2), (3):
- Volts: 12.50
- CCA measured: 670
- CCA Rating: 760
- Resistance: 4.50 mΩ
- SOH: 89%
- SOC: 88%
28/5/24 12:50 Leaving battery disconnected, charging with NOCO10, started different behaviour; instead of progressing straight through the charge lights, it gets to 3 lights (orange) and goes back to one light (small red). NOCO10 showed Green light after approximately an hour. Left battery disconnected from truck and charging with NOCO10 overnight.
29/5/24 09:30 Re-ran battery test (disconnected from truck), results (4), (5):
- Volts: 12.72
- CCA measured: 675
- CCA Rating: 760
- Resistance: 4.47 mΩ
- SOH: 90%
- SOC: 100%
29/5/24 10:00 Re-connected battery to truck, verified all truck settings and FORScan mods, changed Target SOC from 103% back to 90%, performed BMS reset. This was all done engine-off but connected to charger and left on charger until:
29/5/24 13:00 Test drive results:
- Start of ½ hour drive away (6)
- ½ hour in the gun shop ?
- End of ½ hour drive back (7)
Lessons learned:
1. The NOCO10 charger works perfectly
2. The Ancel battery tester works as advertised
3. Even though my truck sat turned off from Feb '23 to Nov '23 (with a handful of starts for shipping, conversion etc.) the battery was actually good (but low SOC) through all that time
4. Even when truck is asleep, the BMS strategy still prevents a full external charge
5. For a full charge and reliable battery test, the battery must be disconnected from the truck
6. The Ford PID for battery SOC% and current are only reporting what the BCM (via the BMS) is telling it, which is not necessarily the disconnected SOC% of the battery
7. A longer driving day will confirm or deny maintenance of SOC, but I'd feel better once I've got the BMS strategy updated. The original SOC level is the cause of the issues I noted at the top of the post, and likely either came from the battery manufacturer that way, or SOC sank during many months of engine-off. It never got better, likely because the battery never got an "out of truck" charge and BMS reset combination.
Conclusion: before going through the hassle of dealer testing and replacement, charge your H6 "out of truck" for 24 hours and BMS reset; get a cheap battery tester like the Ancel and charger like the NOCO10.
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