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 > New Ram 1500 and it's mild hybrid system

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Acei

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Posted: 04/16/18 03:20pm Link  |  Quote  |  Print  |  Notify Moderator

Actually, this has more to do with it's battery and how it can be used.

Does anyone know if the lithium battery built into this system can power the accessories within the vehicle?

Looks like that battery can store up to 430wh and since there's a separate lead acid battery, I would guess you can completely drain that lithium battery without any worries.

This could be very useful for those who camp a lot if the 48v lithium battery converts to 12v and directly hooks into accessory power ports.

Lwiddis

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Posted: 04/16/18 04:37pm Link  |  Quote  |  Print  |  Notify Moderator

I have not seen any manufacturer of lithium batteries recommending a user drain their batteries below 20% SOC.


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Lwiddis

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Posted: 04/16/18 04:44pm Link  |  Quote  |  Print  |  Notify Moderator

Techrepulbic, for instance, says:

“4: Avoid completely discharging lithium-ion batteries

If a lithium-ion battery is discharged below 2.5 volts per cell, a safety circuit built into the battery opens and the battery appears to be dead. The original charger will be of no use. Only battery analyzers with the boost function have a chance of recharging the battery.”

Me Again

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Posted: 04/16/18 04:57pm Link  |  Quote  |  Print  |  Notify Moderator

Acei wrote:

Actually, this has more to do with it's battery and how it can be used.

Does anyone know if the lithium battery built into this system can power the accessories within the vehicle?

Looks like that battery can store up to 430wh and since there's a separate lead acid battery, I would guess you can completely drain that lithium battery without any worries.

This could be very useful for those who camp a lot if the 48v lithium battery converts to 12v and directly hooks into accessory power ports.


Lithium batteries do not like to be completely discharged. Chris


2015 RAM 3500 CC SB SRW Our Rig New 2017 Bighorn 3575el. Commuter trailer 2019 Laredo 225MK. Retired and enjoying it!


Acei

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Posted: 04/16/18 05:34pm Link  |  Quote  |  Print  |  Notify Moderator

Me Again wrote:

Acei wrote:

Actually, this has more to do with it's battery and how it can be used.

Does anyone know if the lithium battery built into this system can power the accessories within the vehicle?

Looks like that battery can store up to 430wh and since there's a separate lead acid battery, I would guess you can completely drain that lithium battery without any worries.

This could be very useful for those who camp a lot if the 48v lithium battery converts to 12v and directly hooks into accessory power ports.


Lithium batteries do not like to be completely discharged. Chris


I'm assuming they took the right precautions to make sure it doesn't get discharged too low...

ScottG

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Posted: 04/16/18 06:58pm Link  |  Quote  |  Print  |  Notify Moderator

I would let that system age a couple of years before buying.


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NJRVer

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Posted: 04/16/18 07:04pm Link  |  Quote  |  Print  |  Notify Moderator

Me Again wrote:

Acei wrote:

Actually, this has more to do with it's battery and how it can be used.

Does anyone know if the lithium battery built into this system can power the accessories within the vehicle?

Looks like that battery can store up to 430wh and since there's a separate lead acid battery, I would guess you can completely drain that lithium battery without any worries.

This could be very useful for those who camp a lot if the 48v lithium battery converts to 12v and directly hooks into accessory power ports.


Lithium batteries do not like to be completely discharged. Chris


Never had a problem discharging all my tool batteries.

time2roll

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Posted: 04/16/18 07:16pm Link  |  Quote  |  Print  |  Notify Moderator

I doubt the RAM will have a DC/DC converter to produce 12 volts like a vehicle that runs just on battery power. If the engine runs 100% of the time there will be an alternator that supplies 12 volt power.

Either way there would be a BMS to protect the lithium from over charge or over discharge.


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ScottG

Bothell Wa.

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Posted: 04/16/18 07:21pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

I doubt the RAM will have a DC/DC converter to produce 12 volts like a vehicle that runs just on battery power. If the engine runs 100% of the time there will be an alternator that supplies 12 volt power.

Either way there would be a BMS to protect the lithium from over charge or over discharge.


The eng wont run all the time, it will have start/stop technology.

rjstractor

Auburn, WA

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Posted: 04/16/18 07:21pm Link  |  Quote  |  Print  |  Notify Moderator

Acei wrote:

Actually, this has more to do with it's battery and how it can be used.

Does anyone know if the lithium battery built into this system can power the accessories within the vehicle?

Looks like that battery can store up to 430wh and since there's a separate lead acid battery, I would guess you can completely drain that lithium battery without any worries.

This could be very useful for those who camp a lot if the 48v lithium battery converts to 12v and directly hooks into accessory power ports.


430 wh is not much power to work with. A run-of-the-mill lead-acid RV battery is about 100 amp/hours which is roughly 1200 wh. From what I saw in this video the system's main purpose is to provide auto start/stop capability and to essentially act as an electronic "flywheel" to capture some braking energy and put it back to the drive wheels when needed. The engineer claimed a 10% increase in fuel economy.

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