Shorai BMS01
User’s Guide
Battery Management System
for LFX Lithium-Iron Batteries
Do NOT remove any of the QC or Serial# decals found on the
charger. These are REQUIRED in case of warranty claim.
LFX BATTERY CAUTIONS
Do not short battery terminals together!
Remove all jewelry (ring, bracelet, necklace, watch, etc.)
before working near batteries or chargers
Do not short the 5-pin BMS port
Attach ONLY Shorai Chargers to the BMS port
Do not open or allow damage to the battery case
Keep batteries away from pets and children
Do not allow LFX discharge below 13.0V resting
Fully discharge LFX battery before disposal/recycle
(connect a 12V bulb until light is out, for example)
BMS01 CHARGER CAUTIONS
BMS01 are for charging and storage of Shorai LFX
batteries ONLY!
Connect BMS01 AC Input plug to 100V~250V 50/60Hz
single-phase AC wall socket, only.
Never allow the charger to become wet. Keep out of snow,
rain, and highly humid environments
Chargers damaged by impact, moisture, or any other cause
must NOT be used
Use the built-in retractable hook to hang BMS01 off the
floor whenever possible
Keep 5’ (1.5M) minimum clearance from flammables
around battery or vehicle during charge or store mode
Keep charge output cable connectors clean and dry. Apply
an anti-corrosion electrical grease if in salty, humid, or wet
environments
Replace charge output cables after 1200 connect cycles
BMS01 has 6V and 12V Output Ports. Only one type
(12V
OR 6V)
may be used at a time. Again, only ONE output port
can be cabled at any time.
BMS01 BOX CONTENTS
Shorai BMS01 with Charge & Store modes
AC input cord
(version per user choice location)
Battery Charge Cables for 12V
Charge Extension Cables for 12V
This User’s Guide
SETUP
Remove the BMS01 charger, AC Input cord, and the two charge
cables from the packaging, and attach the AC Input power cord to the
AC port shown below.
Note that the small 3-pin port to right of the AC Input is reserved for
factory diagnostics, and should never be used, modified, or have
anything attached to it.
The BMS01 is supplied with a long and short cable for 12V LFX.
(cables for the 6V LFX batteries are no longer available). The longer
cable can be permanently attached to the battery via its 5-pin
connector (which is labeled “to battery”), and kept on the vehicle,
where it is protected from water and damage. The opposite end of the
cable can be plugged directly into the BMS01 charger output port, if it
is long enough to reach. If extension is required, the shorter cable in
the set can be used for that purpose. The 12V/6V charge ports are
shown below.
At this point you should have the battery charge cable connected to
the battery BMS port, and the AC input cord connected to the charger.
Now insert the AC plug into an appropriate AC wall socket.
Whenever possible, use the charger’s retractable hook to hang the
BMS01 above the floor, in a location which allows easy access to the
battery charge cable. Now plug the battery charge cable into the
LFX12V charge output port (or into the extension cable).
The charger will “beep” a few times when the LFX battery is
connected to the charge cable, and you should see both the yellow
Store and green Charge LED on solid, indicating that the charger is
ready for input.
After pressing either the store or charge button you
will hear a “triple” beep which indicates the charger is active.
Note-
If a button is not pressed within 30 seconds the charger will power
down. To turn the BMS01 on again, press the charge button.
The photo above shows the two operation buttons, and their
corresponding LED indicators.
Store Mode -
The BMS01 Store Mode is optimized to maintain
Shorai LFX batteries for best lifespan and performance. Once Store
Mode has been started, the BMS01 can remain attached to the LFX
battery and wall power indefinitely, until the vehicle is to be used
again. When Store Mode is activated, the BMS01 will either charge
or discharge the LFX battery until an approximate 80% charged state
is reached. At that point the BMS01 will monitor capacity, and when
~60% state is reached will re-charge to ~80% level, and so on. This
range is ideal for lithium-iron storage.
LFX crank vehicles strongly
even if well below 60% capacity state, however for the best
performance and longest life span press the charge button to fully
charge the battery before use, after long storage.
Charge Mode -
The BMS01 charge mode charges at 2A peak rate,
while balancing the internal LFX cells and performing battery
diagnostics. Charge completion will typically occur within 30 minutes
to 4 hours, depending on the size and state of the battery at charge
start.
When the battery voltage reaches ~14.4V the charging process is
