Braeden Hamson
- Feb 18, 2016
- 240
- Joined
- Feb 18, 2016
- Messages
- 240
I've got a bit of a bear of a problem to tackle. I need to determine the rating of in house fuses for my student racing team. This is an overcurrent protection fuse for a 21700 cell. The issue is that a the 21700 we're using can handle 45A and not really mind. This means the fuse for overcurrent protection needs to be very significant. I need to determine the opening times of this fuse from 1/10th of a second out to about a minute and lots of different times in between those two points. So this will probably be upwards of 400A and at least 100A for a minute. Serious currents across what is basically a dead short.
We are an EV team, so I'm no stranger to high voltage and high currents. Getting 400A is simple enough, with enough hobby lipo batteries in parallel you can achieve this. However, regulating this current is the issue for me now.
In the past I've used resistors to do this, is there perhaps a more elegant way? The resistors didn't give me very good control over the currents which would be desirable.
Does anyone have any ideas for a method to do this that gives me perhaps 10A-30A resolution?
We are an EV team, so I'm no stranger to high voltage and high currents. Getting 400A is simple enough, with enough hobby lipo batteries in parallel you can achieve this. However, regulating this current is the issue for me now.
In the past I've used resistors to do this, is there perhaps a more elegant way? The resistors didn't give me very good control over the currents which would be desirable.
Does anyone have any ideas for a method to do this that gives me perhaps 10A-30A resolution?
