I received my 300 amp Daly bms yesterday and have a few questions. I know these are dumb questions, but I have never done this before and the "instructions" are so appalling that just don't want to make a stupid mistake.
I am building a 24 volt (8s) battery.
As you can see in the picture, there are two each P- and B- leads. Each one is size 2 AWG.
1. Am I correct in thinking that these are just doubled up for added current carrying capacity and can be treated as single cables?
If you follow the P- lead in the picture instructions, you see it goes to an object that looks like it could be a bus bar. But looking closer it does not seem like it is a bus bar. Instead it appears to be two separate terminals, isolated from each other (P+ and P-).
2. Is that object meant to represent two isolated terminals or a bus bar?
To the right of the P+ / P- object are two more objects (Motor/Load and Charger). There is an indication that there is a connection between these objects and the P+ and P- leads, respectively.
3. Am I correct in assuming that the diagram is meant to show that the positive cable on the load side of the system goes to P+ and the positive cable on the charge side of the system goes to P-?
FYI the instructions appear to be for two different styles of BMS -- "regular" and "smart" with the smart version apparently having bluetooth output. I do not have the smart version, but I am supposed to have temperature protection.
The BMS came with the leads shown in the second picture. I understand that the group of 8 leads are the balance leads and I think I understand how to connect them. But I am unclear as to when it is okay to plug these leads into the BMS.
4. Does it matter when the balance leads are plugged into the BMS?
The other leads in the picture are a set of two wires and a plug on one end. I am 99% certain that these are for temperature sensing (the BMS was advertised as having hot and cold temperature protection). I cannot pull anything out of the instructions with regards to connecting these two wires. I am guessing that maybe one wire goes to the main positive of the battery and the other goes to the main negative of the battery.
5. Is my assumption correct?
6. Are these connections polarity sensitive?
7. For temperature sensing, wouldn't there need to be a temperature probe at the battery? Can a simply wire sense the temperature of the battery? Or is the BMS using ambient temperature of the BMS as the temperature?
Thanks in advance for any help with these extremely basic questions.
8. Any other "gotchas" I should watch out for?
9. Does @Will Prowse have a video that covers this? I'm sure he does, but finding it is another thing. Anyone have a link?
Thanks in advance.
I am building a 24 volt (8s) battery.
As you can see in the picture, there are two each P- and B- leads. Each one is size 2 AWG.
1. Am I correct in thinking that these are just doubled up for added current carrying capacity and can be treated as single cables?
If you follow the P- lead in the picture instructions, you see it goes to an object that looks like it could be a bus bar. But looking closer it does not seem like it is a bus bar. Instead it appears to be two separate terminals, isolated from each other (P+ and P-).
2. Is that object meant to represent two isolated terminals or a bus bar?
To the right of the P+ / P- object are two more objects (Motor/Load and Charger). There is an indication that there is a connection between these objects and the P+ and P- leads, respectively.
3. Am I correct in assuming that the diagram is meant to show that the positive cable on the load side of the system goes to P+ and the positive cable on the charge side of the system goes to P-?
FYI the instructions appear to be for two different styles of BMS -- "regular" and "smart" with the smart version apparently having bluetooth output. I do not have the smart version, but I am supposed to have temperature protection.
The BMS came with the leads shown in the second picture. I understand that the group of 8 leads are the balance leads and I think I understand how to connect them. But I am unclear as to when it is okay to plug these leads into the BMS.
4. Does it matter when the balance leads are plugged into the BMS?
The other leads in the picture are a set of two wires and a plug on one end. I am 99% certain that these are for temperature sensing (the BMS was advertised as having hot and cold temperature protection). I cannot pull anything out of the instructions with regards to connecting these two wires. I am guessing that maybe one wire goes to the main positive of the battery and the other goes to the main negative of the battery.
5. Is my assumption correct?
6. Are these connections polarity sensitive?
7. For temperature sensing, wouldn't there need to be a temperature probe at the battery? Can a simply wire sense the temperature of the battery? Or is the BMS using ambient temperature of the BMS as the temperature?
Thanks in advance for any help with these extremely basic questions.
8. Any other "gotchas" I should watch out for?
9. Does @Will Prowse have a video that covers this? I'm sure he does, but finding it is another thing. Anyone have a link?
Thanks in advance.