Quote:
Originally Posted by ogregev
Unfortunately, you can't just go with an average, you need to know if any of the six thermistors triggers.
We looked into adapting the PTC circuit, but it was not sensitive enough. Its' basic settings are normal, normal, normal, about to catch fire.
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And you can build the device to do any if you wish... it doesn't have to be an average.
Super Brain has 'sensor input' plug ... it doesn't know if it is or is not actually a sensor ... all it knows is that it expects it to be within a certain range of resistance ... and for that resistance to change as the temperature of the battery it is in contact with changes.
That sensor input could be the output from the auxiliary device ... the auxiliary device itself monitors each individual cells temperature with it's own temperature sensors ... one on each cell ... the auxiliary device then changes the signal to the Super Brain when it determines the temperatures are at some point you design it to look for as a trigger.
That trigger point could be a specific temperature ... or you could be looking for the dT/dt type effects... whatever you choose it to be in the design ... if you wanted to get fancy in the design you could make it changeable ... either directly or by connecting it to a PC.
That is what I was referring to by the external circuit.
Now weather it is worth the effort or not ... that depends ... but it is doable.