Help needed with grid charging/discharging.
#11
01-09-2024, 06:12 PM
Re: Help needed with grid charging/discharging.
Thanks again for your works of wisdom. Very much appreciated.
Just finished the 25 hour balance charge. Final voltage was 193.
I have two things to share with those who might be reading this thread. First, it might be a good idea to leave the fan running for a period of time after ending the charge to allow for the battery to cool. Second, if you're using an inexpensive $6.99 7-function digital multimeter from Harbor Freight (also available from other sources) and getting strange readings you might want to replace the 9 volt battery. In my case the grid charger voltage seemed to be fluctuating in a strange way that I hadn't experienced before. After replacing the 9 volt battery in the meter (old battery was only at about 8 volts) everything was normal. Just to be certain, I switched to my Fluke multimeter for confirmation.
Just finished the 25 hour balance charge. Final voltage was 193.
I have two things to share with those who might be reading this thread. First, it might be a good idea to leave the fan running for a period of time after ending the charge to allow for the battery to cool. Second, if you're using an inexpensive $6.99 7-function digital multimeter from Harbor Freight (also available from other sources) and getting strange readings you might want to replace the 9 volt battery. In my case the grid charger voltage seemed to be fluctuating in a strange way that I hadn't experienced before. After replacing the 9 volt battery in the meter (old battery was only at about 8 volts) everything was normal. Just to be certain, I switched to my Fluke multimeter for confirmation.
Yep. Meter weirdness is usually the battery or a bad connection. When at peak voltage, it's not uncommon to see a little fluctuation.
Good luck!!!!!
#12
01-10-2024, 03:28 PM
Re: Help needed with grid charging/discharging.
Installed the battery in the car today and got a negative recal after driving the car for an hour. Also got the "marching" bars up to full. The previous owner of the car claimed he never had an IMA light during his five years of ownership. The car doesn't have any IMA or any other type of CEL.
Just out of curiosity, what is it about the HCH2 battery that makes it a poor candidate for discharging?
Thanks again.
Just out of curiosity, what is it about the HCH2 battery that makes it a poor candidate for discharging?
Thanks again.
#13
01-10-2024, 04:47 PM
Re: Help needed with grid charging/discharging.
Installed the battery in the car today and got a negative recal after driving the car for an hour. Also got the "marching" bars up to full. The previous owner of the car claimed he never had an IMA light during his five years of ownership. The car doesn't have any IMA or any other type of CEL.
Just out of curiosity, what is it about the HCH2 battery that makes it a poor candidate for discharging?
Thanks again.
Just out of curiosity, what is it about the HCH2 battery that makes it a poor candidate for discharging?
Thanks again.
A common complaint with the HCH2 is the updated software that will recalibrate a failing battery over and over and over before actually triggering P0A7F/IMA.
ALL Honda batteries present a discharge risk. The HCH2 is just the worst of them.
If you receive another recalibration, I would increase charge time to 32-36 hours and then discharge to 99V. Repeat 32-36h charge, install, pray, and try again.
#14
01-10-2024, 05:18 PM
Re: Help needed with grid charging/discharging.
Okay. I understand. Not to be pessimistic, but I have a feeling that I haven't seen the last of the recalibrations. If or when I end up discharging the battery, should I use two 60W bulbs in series down to 145V and then switch to 25W bulbs from that point down to 99V?
Thank you once again. Your help is greatly appreciated.
Thank you once again. Your help is greatly appreciated.
#15
01-10-2024, 05:28 PM
Re: Help needed with grid charging/discharging.
'Now that I think about it, I don't believe that the positive recal immediately followed the negative recal. It may have been later in the drive. Not sure if that's relevant.
#16
01-10-2024, 06:13 PM
Re: Help needed with grid charging/discharging.
It would have happened a few minutes after the drop to 2 bars and forced charge.
#17
01-10-2024, 06:19 PM
Re: Help needed with grid charging/discharging.
Okay. I understand. Not to be pessimistic, but I have a feeling that I haven't seen the last of the recalibrations. If or when I end up discharging the battery, should I use two 60W bulbs in series down to 145V and then switch to 25W bulbs from that point down to 99V?
Thank you once again. Your help is greatly appreciated.
Thank you once again. Your help is greatly appreciated.
#19
01-11-2024, 07:07 AM
Re: Help needed with grid charging/discharging.
5.5A/.157A = 35 hours
#20
01-13-2024, 10:36 AM
Re: Help needed with grid charging/discharging.
Not surprisingly the car did another negative/positive recal early into the drive after sitting overnight. I think that was the only time during my 170 mile trip. I'm guessing that it's possibly a self discharge issue. I will perform the charge/discharge/charge per your instructions and report back with the results. It might be a few days.
Thank you for your help and have a good weekend.
Thank you for your help and have a good weekend.
