We should have a good way to control the voltage output for that type of application I'm guessing? Or only limit the use to 12v appliances.shirley_hkg wrote:Other than as an add-on to your chair , it is very good to power hoist/lift . It can do months, without recharged .
Burgerman wrote:I use 10 sq mm.
Is their anyway to view bm pl8 presets for a 8s 230ah pack and settings like the termination voltage for example. I would like to be able to use those presets an settings as a reference when setting up a lithium profile on the iCharger 4010 duo when I get it?
I was also wondering about discharging should I get a resistor bank for discharging using the iChargers 2nd channel or will the iCharger be able to discharge by its self?
Burgerman wrote:Is their anyway to view bm pl8 presets for a 8s 230ah pack and settings like the termination voltage for example. I would like to be able to use those presets an settings as a reference when setting up a lithium profile on the iCharger 4010 duo when I get it?
No. Set initially to:
charge at your chosen amps, to 3.600v per cell. Set it to terminate after 4 hours CV provided it is balanced. Set it to terminate at 1/320th to 1/500th is its capacity in Ah. Whichever occurs first.
With the PL8 you would set everything to manual and choose those settings and it all works independently so easy. With the iChargers the termination current (NOT VOLTAGE) is set as a proportion of charge voltage. So that complicates things. If yu set 25A charge then you set say 1% OF THAT AS THE TERMINATION CURRENT. This means your termination point would be a 1% of 25A. Or 250mA. So you would need to consider the charge current as well as how many mA that 1 or 2 or 3 percent is. And time you set seperately.I was also wondering about discharging should I get a resistor bank for discharging using the iChargers 2nd channel or will the iCharger be able to discharge by its self?
The icharger can discharge by itself slowly.
fishinjunky wrote:]are these cable sizes sufficient for a 8s x 230ah pack?
fishinjunky wrote:6awg or 8awg for connecting the cells instead of using bus bars?
fishinjunky wrote:10awg for charging cable?.
fishinjunky wrote:10awg for cable going from battery pack to power module?
fishinjunky wrote:Also do I need to make sure to get cast extra thick wall terminals (not copper)?
fishinjunky wrote:And would it be beneficial to include a cell monitor in the build. I would like to be able to get an idea of battery level while out riding just for peace of mind. What would be my best option for doing that?
swalker wrote:fishinjunky wrote:]are these cable sizes sufficient for a 8s x 230ah pack?
For my 176 Ah pack (8 cells in series), I used the following. I would do the same for a 230 Ah pack.fishinjunky wrote:6awg or 8awg for connecting the cells instead of using bus bars?
I computed 10 sq mm was the conservative size, which equates to 7 AWG. Since neither 10 sq mm nor 7 AWG was readily available in the US, I went with 6 AWG. It worked great. In my opinion, bus bars are too rigid and may cause the connections to the cells to loosen up over time. I made sure the cable I used for inter battery connections were flexible and I used relatively long runs (see the yellow cables in the attached picture).fishinjunky wrote:10awg for charging cable?.
I used 10 AWGfishinjunky wrote:10awg for cable going from battery pack to power module?
I used 10 AWGfishinjunky wrote:Also do I need to make sure to get cast extra thick wall terminals (not copper)?
I favor high quality, tinned copper terminals. For the larger size, I used Selterm marine grade terminals. For smaller sizes, I used Ancor marine grade terminals. All were tinned copper and heavy enough to use with appropriate crimping tools for crimped connections.fishinjunky wrote:And would it be beneficial to include a cell monitor in the build. I would like to be able to get an idea of battery level while out riding just for peace of mind. What would be my best option for doing that?
I added a cell meter to my setup and found it pretty useful, especially as I was new to using the LiFePO4 battery pack. I use it less now, but still use it enough that it goes with me on every ride. Here is the one I used: https://www.amazon.com/gp/product/B073W ... UTF8&psc=1
Steve
Burgerman wrote:.
swalker wrote:fishinjunky wrote:]are these cable sizes sufficient for a 8s x 230ah pack?
For my 176 Ah pack (8 cells in series), I used the following. I would do the same for a 230 Ah pack.fishinjunky wrote:6awg or 8awg for connecting the cells instead of using bus bars?
I computed 10 sq mm was the conservative size, which equates to 7 AWG. Since neither 10 sq mm nor 7 AWG was readily available in the US, I went with 6 AWG. It worked great. In my opinion, bus bars are too rigid and may cause the connections to the cells to loosen up over time. I made sure the cable I used for inter battery connections were flexible and I used relatively long runs (see the yellow cables in the attached picture).fishinjunky wrote:10awg for charging cable?.
I used 10 AWGfishinjunky wrote:10awg for cable going from battery pack to power module?
I used 10 AWGfishinjunky wrote:Also do I need to make sure to get cast extra thick wall terminals (not copper)?
I favor high quality, tinned copper terminals. For the larger size, I used Selterm marine grade terminals. For smaller sizes, I used Ancor marine grade terminals. All were tinned copper and heavy enough to use with appropriate crimping tools for crimped connections.fishinjunky wrote:And would it be beneficial to include a cell monitor in the build. I would like to be able to get an idea of battery level while out riding just for peace of mind. What would be my best option for doing that?
I added a cell meter to my setup and found it pretty useful, especially as I was new to using the LiFePO4 battery pack. I use it less now, but still use it enough that it goes with me on every ride. Here is the one I used: https://www.amazon.com/gp/product/B073W ... UTF8&psc=1
Steve
LROBBINS wrote:I am surprised that no one has commented on your choosing AWG10 for the battery to PM connection. That's too small. Most of us in Europe are using 10mm^2 for that, but the AWG7 equivalent is not to be found. You can go to AWG6, which is fatter than needed, if you can't find 10mm^2 or AWG7.
fishinjunky wrote:How were you able to calculate battery level using the cell monitor volts?
I would like to know a way to get a rough idea on hand.
But I'll also log my milage an log how much ah goes back in after charging. I'll log all terrains and hills to get an idea over time of battery usage per mile on hills, flat,, or rough terrain each would be different
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