The pattern for that I made from some factory vest.
6 meters of carbon heater tape placed on back and both sides.
Because of big length it provides uniform heating of body.
Tape connected in parallel 6x1m. It takes about 3A under 12V (36W).
Wires sewed to carbon tape to make a good and flexible connection. The contact place shouldn't be hotter than the tape itself. If not you must increase the contact area. The best idea to place wire between two layers of carbon tape.
I've tested two types of connections.
Contacts may be sewed by sewing machine or just wraped with a wire.
As you can see sewed contact is colder than the tape itself (left contact).
Wraped contact (on the right) is more hotter than tape.
It's powered by 6x18650 connected in parallel (2x3). Power push button on chest.
I use it with an adjustable controller.
Canister still not ready
With a half power.
It's very soft. Unlike conventional heated jackets in which heaters are in pads or with a thick heating wire, my vest do not interfere if to lean against the back of the seat or underwater.
6 meters of carbon heater tape placed on back and both sides.
Because of big length it provides uniform heating of body.
Tape connected in parallel 6x1m. It takes about 3A under 12V (36W).
Wires sewed to carbon tape to make a good and flexible connection. The contact place shouldn't be hotter than the tape itself. If not you must increase the contact area. The best idea to place wire between two layers of carbon tape.
I've tested two types of connections.
Contacts may be sewed by sewing machine or just wraped with a wire.
As you can see sewed contact is colder than the tape itself (left contact).
Wraped contact (on the right) is more hotter than tape.
It's powered by 6x18650 connected in parallel (2x3). Power push button on chest.
I use it with an adjustable controller.
Canister still not ready
With a half power.
It's very soft. Unlike conventional heated jackets in which heaters are in pads or with a thick heating wire, my vest do not interfere if to lean against the back of the seat or underwater.