Timeline for Charge batteries in parallel, discharge in series
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 5 at 12:10 | comment | added | Davide Andrea | "How do series packs usually handle this? " The problem is avoided by not doing series batteries in the first place. Instead of two batteries in series, we make single higher-voltage battery. | |
| Apr 5 at 2:50 | comment | added | Alex I | "When it opens under load..." - that is a big problem. How do series packs usually handle this? I guess I could only limit to a very moderate discharge (let's say from 4.2V down to 3.5V per cell or so) but it really seems any series pack would need some way to disconnect the load well before any individual battery's BMS tries to do so | |
| Apr 5 at 2:48 | comment | added | Alex I | "in the two batteries" - oh, I'm thinking of a decently big stack, around 20-30. I figured that can definitely be done with relays (just use relays rated at 200V 5-10A or so) but I was curious if there is any solid state method to do the same | |
| Apr 5 at 2:46 | comment | added | Alex I | "which will cause an inrush of current which may degrade the battery with the lowest SoC" - true, I thought about that. may have to connect some decent sized resistors in between for a while, and then start charging | |
| Apr 5 at 2:44 | comment | added | Alex I | On this "Balancing is trickier" isn't balancing simply charging the batteries to the same voltage? If charged in parallel, they would always be perfectly balanced at the beginning of discharge | |
| Apr 5 at 1:41 | history | answered | Davide Andrea | CC BY-SA 4.0 |