A "Virtual Battery" for Mobile Home usage

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Cherry67

Member
Joined
May 13, 2018
Messages
496
As promised I will describe circuit and Plan of my bidirectinal converter.

I suggest you guys will ask and discuss about it, so i will transfer this building description to a separate thread in electrical section, You all Know his section is for concepts, not for discussions.

Since i had put the first ideas of this issues already in a thread there, i will continue there with the converters building details :
https://secondlifestorage.com/showthread.php?tid=7259&pid=68744#pid68744

I might add, belonging to this section, that the first build is still working in my mobile home, now during one year.

1st Build:

Size: 10s18p (three bicycle packs in parallel)

Electrics battery: 36 V 52 Ah nominal (limited to 4.0 v/cell it is about 46 Ah) Since it is used cells, it might be a bit less

Electrics converter: max 12 Amps Up direction. max 10 Amps low direction. Load voltage 12.8 V, Boost voltage 13.2 V (and higher)

Cycles: The systems has supplied close to 20 kWh to the car, so might be the aequivalent 10+ full cycles.


The second build i did for a friend of mine, which builds a small Mobile home based on a 24 V Car system:

2nd Build

Size: 10s12p (currently two bicycle packs in parallel, possible upgrade to double))

Electrics battery: 36 V 24 Ah nominal (Llmited to 4.0 v/cell it is about 22Ah) Since it is used cells, it might be a bit less

Electrics converter: max 5 Amps Up direction. Max 7 Amps low direction. Load voltage 25,6 V, Boost voltage 26.2 V (and higher)

Cycles: The build is just ready and will start operation next year.
 

Cherry67

Member
Joined
May 13, 2018
Messages
496
A while gone by since i was Here Last Time.
I have been living in the mobile home frequently, and allmost continuously die the Last 4 months. The 3 Bike battery Pack has done proud, but Starts to degrade with each additional cycle.
Last i have about 800 Wh, which should have been 1200, at least.
I guess the bikebatterys May have very different aging, some by time, some by cycling.

For the Matters i will build Up 24 LiFePo. Will Report soon.
 
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