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Then perhaps you'd care to share one? Or maybe just start cranking out magic batteries and become uber-wealthy? Since you haven't done that, I find it more lik

by nknight 15y ago

Then perhaps you'd care to share one? Or maybe just start cranking out magic batteries and become uber-wealthy? Since you haven't done that, I find it more likely you have no clue what you're talking about.

aidenn0 15y ago
Here's one: Rather than brick the battery, if it is parked and below a certain level, release a normally open relay that completely disconnects the BMS from the cells. Recovering from this state would require special charging and recalibrating of the BMS (possibly done at a shop) but it would be better than bricking the pack.
- aidenn0 15y ago
  Here's one: Rather than brick the battery, if it is parked and below a certain level, release a normally open relay that completely disconnects the BMS from the cells. Recovering from this state would require special charging and recalibrating of the BMS (possibly done at a shop) but it would be better than bricking the pack.
- nknight 15y ago
  Disconnecting the BMS does not eliminate self-discharge, only the parasitic load. Draining your batteries to the point of being functionally dead, and then leaving them in that state for an extended period, will still "brick" them just as badly.
pbreit 15y ago
Here are 4: switch, backup battery, mini engine, solar panel.
- nknight 15y ago
  Switch does not solve the problem, "backup battery"? You're just delaying the inevitable, why not just demand that they make the batteries bigger in the first place? What good does a "mini engine" do? You can't turn it on automatically, that's an enormous safety risk and would never make it past insurers or the government, and it can only last as long as its fuel holds out, again you're just delaying the inevitable. Solar panels don't help if you're parked in a garage, which is where most people park their fancy roadsters, and they'd have to be huge to maintain the charge anyway. And absolutely none of this contradicts my original point: It's a technological limitation. This is how batteries work. You're not proposing a solution, you're proposing unworkable band-aids.
  - pbreit 15y ago
    Nothing is ever solved completely, only satisfactorily.

by nknight 15y ago

aidenn0 15y ago

Here's one: Rather than brick the battery, if it is parked and below a certain level, release a normally open relay that completely disconnects the BMS from the cells. Recovering from this state would require special charging and recalibrating of the BMS (possibly done at a shop) but it would be better than bricking the pack.

aidenn0 15y ago
Here's one: Rather than brick the battery, if it is parked and below a certain level, release a normally open relay that completely disconnects the BMS from the cells. Recovering from this state would require special charging and recalibrating of the BMS (possibly done at a shop) but it would be better than bricking the pack.
nknight 15y ago
Disconnecting the BMS does not eliminate self-discharge, only the parasitic load. Draining your batteries to the point of being functionally dead, and then leaving them in that state for an extended period, will still "brick" them just as badly.

pbreit 15y ago

Here are 4: switch, backup battery, mini engine, solar panel.

nknight 15y ago
Switch does not solve the problem, "backup battery"? You're just delaying the inevitable, why not just demand that they make the batteries bigger in the first place? What good does a "mini engine" do? You can't turn it on automatically, that's an enormous safety risk and would never make it past insurers or the government, and it can only last as long as its fuel holds out, again you're just delaying the inevitable. Solar panels don't help if you're parked in a garage, which is where most people park their fancy roadsters, and they'd have to be huge to maintain the charge anyway. And absolutely none of this contradicts my original point: It's a technological limitation. This is how batteries work. You're not proposing a solution, you're proposing unworkable band-aids.
- pbreit 15y ago
  Nothing is ever solved completely, only satisfactorily.