DIY TESLA POWER WALL
Member
- Joined
- Oct 8, 2016
- Messages
- 57
Every person installing 18650 cells in parallel needs to know the answer to this question.
I see some people scared of the volts. I see many people not scared of anything. What I don't see, is anyone afraid of the amps.
A single 18650 cell has a a short circuit current of 50A. Multiply that by the number of cells in parallel. This is your PSCC (prospective short circuit current). 1000A can set a huge battery cable on fire within 5 seconds. Some people will have far more than 1000A.
What protection devices do you have in place to disrupt this current?
If your answer is a circuit breaker, you fail.
If your answer is a glass fuse (or any fuse where you can see the fuse wire itself), you fail.
If your answer is a HRC fuse, you pass.
I see some people scared of the volts. I see many people not scared of anything. What I don't see, is anyone afraid of the amps.
A single 18650 cell has a a short circuit current of 50A. Multiply that by the number of cells in parallel. This is your PSCC (prospective short circuit current). 1000A can set a huge battery cable on fire within 5 seconds. Some people will have far more than 1000A.
What protection devices do you have in place to disrupt this current?
If your answer is a circuit breaker, you fail.
If your answer is a glass fuse (or any fuse where you can see the fuse wire itself), you fail.
If your answer is a HRC fuse, you pass.