Newly purchased, not yet arrived Sterling Power LiFePO4 100ah. I'm sure the BMS will stop charging below it's lowest temp.
I'm curious about what practical benefits people are getting from buying low temp batteries.
Low temperature lithium battery
- Thread starter DEH
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I'm curious about what practical benefits people are getting from buying low temp batteries.
People do use campers for skiing, for instance, so there definitely are genuine use cases. Plus, people also use vans for UK winter, think winter mountaineering in Scotland for example.
i use my van for work all year round. . .
and use the inverter to charge drills and run tools etc . . .
during winter the battery temp can drop to -5degc.
most manufactures advice caution on fast charging below +5degc.
and Prohibit charging below 0degC
and as @t0mb0 says . . Alps, Scottish highlands etc etc.
plus the European people etc etc .
and use the inverter to charge drills and run tools etc . . .
during winter the battery temp can drop to -5degc.
most manufactures advice caution on fast charging below +5degc.
and Prohibit charging below 0degC
and as @t0mb0 says . . Alps, Scottish highlands etc etc.
plus the European people etc etc .
So essentially, the battery can be charged/operate before the camper's brought up to livable temperature. Some juice is required to start the diesel heater, so I guess you could be snookered if you're down to zero battery in sub zero C.
@JBR80 - remember is only CHARGING that is an issue. (below 0degc)
most lifepo4 batterys are fine to DISCGARGE down to -20degc.
have a look over this (low temp covered in detail) :
www.t6forum.com
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most lifepo4 batterys are fine to DISCGARGE down to -20degc.
have a look over this (low temp covered in detail) :
Lithium LifePo4 12v Batteries - Time For An Upgrade?
Lithium Batteries are the future, (keep checking back for the latest news/edits) ************************************************** Dellmassive`s -- "how I Done It" -- Thread ************************************************** Kit List And Stuff -- How I Done It & What I Use --...
.
@Mick
After the battery test being awake for 7days.....
I removed the BM2...last night..... i just checked the battery... guess what.
Its sleeping !!!! (That proves that the bm2 was keeping it awake)
...
10mins ago.
So i added a multimeter.... just the 6v is monitor voltage... still sleeping.
I tried the APP..... no conection.
I attached a clamp power meter.... no change.
.
I touched on the BM2 and the battery come to life.....
.
That tells me that the battery is monitoring the power in or out over a 12hr , 24hr period....... if no power flow it will self sleep shutting off power to the terminals.
But a BM2 in testing will beep it alive....
That would mean the the BMV712 is super low powered and below the point that the battery will reset the power usesage timer.
So if you want it to stay awake all the time and keep the bmv712 powered.... either fit a BM2 or try leaving ur solar charger conected?
.
After the battery test being awake for 7days.....
I removed the BM2...last night..... i just checked the battery... guess what.
Its sleeping !!!! (That proves that the bm2 was keeping it awake)
...
10mins ago.
So i added a multimeter.... just the 6v is monitor voltage... still sleeping.
I tried the APP..... no conection.
I attached a clamp power meter.... no change.
.
I touched on the BM2 and the battery come to life.....
.
That tells me that the battery is monitoring the power in or out over a 12hr , 24hr period....... if no power flow it will self sleep shutting off power to the terminals.
But a BM2 in testing will beep it alive....
That would mean the the BMV712 is super low powered and below the point that the battery will reset the power usesage timer.
So if you want it to stay awake all the time and keep the bmv712 powered.... either fit a BM2 or try leaving ur solar charger conected?
.
I use my van to ski in. In December the temperature dropped to -12c outside and the van was -5c -ish inside. One night my AGM just failed and we woke up bloody freezing when the diesel heater didn't kick in.
So this will tick all my boxes cos sometimes we have to get in the van and drive to a lift and that was always an issue with a LifePO4 battery in some of the temps I experience in Austria and Slovenia.. Suggestions made were to buy a water tank heater pad with a built in thermostat and wrap it around the battery. As yer temp drops it'll heat up the battery. But that is just to much pfaff.
This way the BMS will monitor the temp, switch on the inbuilt temp mat and the bluetooth tell me when heat protection has kicked in.
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I've connected a iPhone plug to the inverter. It's drawing 0.4-0.5a and keeping it awake. It lost 6% overnight.
what inverter @Mick ?
inverters are fairly power hungry . . . oven when on standby.
looks like the BM2 works well . . . (I've got around 10 of them, not had a faulty one yet)
normally when i cant connect to a BM2 its because its already connected to a second device within BT range . . ie a second phone, or a other tablet etc. . . .
its always a right pain trying to hunt down the device that its connected too. (suppose its my fault for having all this tech running on so many different devices !!)
I've sent an email to POWEROAD tech to see if they can clarify the sleep strategy on the . . ..
POWEROAD PRLC-100 - Going to SLEEP after 24hrs?
and asked if the sleep timer can be adjusted via the APP . . ?
lets see if they reply.
POWEROAD PRLC-100 - Going to SLEEP after 24hrs?
and asked if the sleep timer can be adjusted via the APP . . ?
lets see if they reply.
I've written to them 3 times now and no reply.
Yeh.. i ignore the percentage as it based on SLA battery. Tech..
But the voltage logger side of things tells you all you need to know.
I have the reply from Poweroad....
Dear Dellmassive,
Thank you very much for choosing Poweroad batteries and has good experience.
I'm Jason who will be in charge of your inquiry.
The reason why we design the sleep mode is that reduce the energy consumption when the batteries in idle.
There are three ways to enter the sleep mode:
And three ways to wake up the batteries:
Meet any condition can sleep or wake up the batteries.
Hope above info will be helpful for your review.
Peace,
Jason
Jason Lee Sales Representative
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Dear Dellmassive,
Thank you very much for choosing Poweroad batteries and has good experience.
I'm Jason who will be in charge of your inquiry.
The reason why we design the sleep mode is that reduce the energy consumption when the batteries in idle.
There are three ways to enter the sleep mode:
| Method | Introduction | |
| 1 | Timed sleep | In idel state, if there is no charge/discharge current(or the current is lower 1A), start a 24-hour timer and go to sleep after 24 hours. (But if BMS detects the current over 1A during the 24 hours, the timer will be cleared to 0 and not sleep) |
| 2 | Over-discahrge | When the voltage of any battery is lower than the over-discharge protection value for 3 minutes, it will automatically sleep to reduce energy consumption and prevent deep over-discharge |
| 3 | Button | Long press button for 2S to enter sleep mode |
And three ways to wake up the batteries:
| Method | Introduction | |
| 1 | Charging | In idel state, connect the charger to charge battery( the voltage should more than 1.2V) |
| 2 | Discharging | Connecting the load to activated the BMS(the internal resistance of load should be less than 5kΩ) |
| 3 | Button | Press button |
Meet any condition can sleep or wake up the batteries.
Hope above info will be helpful for your review.
Peace,
Jason
Jason Lee Sales Representative
--------------------------------------------------------------------------------
Interesting reply. You’d think that would’ve out that in the manual.
I’ve had a 0.5a-0.6a current running for 48 hours and it hasn’t gone to sleep.
I’ll attach that to the PDF manual
EDIT: It must have gone to sleep at some point cos the BMV is not showing a percentage
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They saying switching the power on will wake it...
Did you try turning lights on?
Maybe fitting a BM2 is an easy fix for your scenario.?
Did you try turning lights on?
Maybe fitting a BM2 is an easy fix for your scenario.?
I have just had a response from Sterling power to state that the BMS will stop charging below 0C, and re-engage charging when the temperature is 5C. It also prevents use at -20C and re-engages use at -15C.@JBR80 - remember is only CHARGING that is an issue. (below 0degc)
most lifepo4 batterys are fine to DISCGARGE down to -20degc.
have a look over this (low temp covered in detail) :
Lithium LifePo4 12v Batteries - Time For An Upgrade?
Lithium Batteries are the future, (keep checking back for the latest news/edits) ************************************************** Dellmassive`s -- "how I Done It" -- Thread ************************************************** Kit List And Stuff -- How I Done It & What I Use --...
.
Thats about standard. The BMS safety feature is what you need. If you'll need to get a charge into it when it's cold then warming the battery is an answer. This is one answer that'll do it. Sit the battery on this or use 2 wrapped around it. Job done.
Shiwaki 9"x5" 12/24V DC RV Camper Water Tank Heater Pad With Automatic Thermostat : Amazon.co.uk: Automotive
Shiwaki 9"x5" 12/24V DC RV Camper Water Tank Heater Pad With Automatic Thermostat : Amazon.co.uk: Automotive
www.amazon.co.uk
Thanks for the link to this, I'll save it if I need it down the line. For now I'm going to see how I get on with heating the van with the diesel air heater before trips in the cold.
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