I'm building an electric car with a 72 volt traction pack: 40 amp hrs of lithium batteries and 115 amp hrs of lead acids in parallel. Each pack has its own charger and will be charged seperately.
I isolated the leads with 10 paralleled 120v/50 amp diodes to provide 500 amps of semi-conduction. The general plan was/is that the leads would backfill the lithiums but not have to absorb the regen surge (I understand that li can handle it much better than lead).
The issue is the difference in ampacity - will the leads damage (stuff?) the lithiums due to the difference in capacity even though the 2 pack voltage is the same? I don't think so, but am afraid to make the last connection until I'm sure, since the lithiums cost just over $2,000.
Any thoughts would be greatly appreciated.
I isolated the leads with 10 paralleled 120v/50 amp diodes to provide 500 amps of semi-conduction. The general plan was/is that the leads would backfill the lithiums but not have to absorb the regen surge (I understand that li can handle it much better than lead).
The issue is the difference in ampacity - will the leads damage (stuff?) the lithiums due to the difference in capacity even though the 2 pack voltage is the same? I don't think so, but am afraid to make the last connection until I'm sure, since the lithiums cost just over $2,000.
Any thoughts would be greatly appreciated.