CharlesBranch
Member
On 7-16-22 I posted about my 12-volt battery failure ( https://tinyurl.com/4ekfrhsj).
Electriceddy suggested that I get a BM2 monitor and report back. On 8-5-22 I posted my first experience with the BM@ monitor (https://tinyurl.com/3bz62a84).
I have now had two more issues while using the BM2 monitor. The first image shows the first incident on 9-6-22 in some detail.
I had parked the Ionic 5 with about 12% (25 miles) remaining. Between 8-31-22 and 9-5-22 I noticed numerous small dips indicated by the blue arrows, but they did not appear to trigger the charger. The charger did apparently come on several times and again when I made a couple of trips. On 9-6-22 I decided to go to an EA charger, but the car was dead again. I connected my jump starter again, drove it to the local charger, and charged it to 90%. I checked the BM2 data and saw that the voltage had spiraled down over about 24 hours. 
On 9-6-22 the voltage fell as low as 6.98 volts. 
A few days later I again parked the car with about 12% (30 miles). On 9-15-22 I went to the EA charger and again charged it to 90%. When I got home, I checked the BM2 again and realized that another spiral had begun, and I apparently got lucky this time. This image shows the previous failure and then the near miss.
The voltage fell to about 11.83 and jumped back up when I drove to the charger.
This makes a total of two complete 12-volt failures plus a third near miss, and this does not seem normal to me. It looks to me like the voltage dips briefly about 1/3 volt about every 20 hours or so. The 12-volt charger comes on occasionally and whenever I make trips. But for no obvious reason, it starts spiraling down, but that does not trigger the 12-volt charger to come on. On all three occasions, the death spiral seemed to begin when the big battery gets to about 11 or 12%, but that should be plenty of power to turn on the charger.
Questions:
1. Why does the 12-volt battery voltage fall so fast?
2. What causes the small voltage dips every day or so?
3. What finally triggers the 12 volt charger to activate?
4. Why does the voltage go into a death spiral?
5. Why doesn't the big battery charge the 12-volt battery even when the big battery has plenty of capacity remaining?
BTW: My FM radio has quit working, and I still notice the burning odor after it has sat for a few days. In spite of all this, the car is a real pleasure to drive. But my wife has started making fun of the car and has even used the "L" word.
Electriceddy suggested that I get a BM2 monitor and report back. On 8-5-22 I posted my first experience with the BM@ monitor (https://tinyurl.com/3bz62a84).
I have now had two more issues while using the BM2 monitor. The first image shows the first incident on 9-6-22 in some detail.
I had parked the Ionic 5 with about 12% (25 miles) remaining. Between 8-31-22 and 9-5-22 I noticed numerous small dips indicated by the blue arrows, but they did not appear to trigger the charger. The charger did apparently come on several times and again when I made a couple of trips. On 9-6-22 I decided to go to an EA charger, but the car was dead again. I connected my jump starter again, drove it to the local charger, and charged it to 90%. I checked the BM2 data and saw that the voltage had spiraled down over about 24 hours. On 9-6-22 the voltage fell as low as 6.98 volts. A few days later I again parked the car with about 12% (30 miles). On 9-15-22 I went to the EA charger and again charged it to 90%. When I got home, I checked the BM2 again and realized that another spiral had begun, and I apparently got lucky this time. This image shows the previous failure and then the near miss.
The voltage fell to about 11.83 and jumped back up when I drove to the charger.This makes a total of two complete 12-volt failures plus a third near miss, and this does not seem normal to me. It looks to me like the voltage dips briefly about 1/3 volt about every 20 hours or so. The 12-volt charger comes on occasionally and whenever I make trips. But for no obvious reason, it starts spiraling down, but that does not trigger the 12-volt charger to come on. On all three occasions, the death spiral seemed to begin when the big battery gets to about 11 or 12%, but that should be plenty of power to turn on the charger.
Questions:
1. Why does the 12-volt battery voltage fall so fast?
2. What causes the small voltage dips every day or so?
3. What finally triggers the 12 volt charger to activate?
4. Why does the voltage go into a death spiral?
5. Why doesn't the big battery charge the 12-volt battery even when the big battery has plenty of capacity remaining?
BTW: My FM radio has quit working, and I still notice the burning odor after it has sat for a few days. In spite of all this, the car is a real pleasure to drive. But my wife has started making fun of the car and has even used the "L" word.
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I will try turning off the BlueLink to see if that has any effect.