V2.2
2022 RUNGU Dualie Rugged/XR series
Copyright 2021 Standard Bearer Machines, LLC
40
Battery Safety
NOTE: If you ever suspect a battery problem, please contact Rungu Support immediately by email or
phone so we can go through the appropriate steps/procedures to make sure everything is okay with
the battery system.
At Standard Bearer Machines, safety is our number one concern. Standard Bearer Machines wants our
customers to enjoy an excellent product that will give those customers years of trouble-free operation.
As much as Standard Bearer Machines and its battery manufacturers invest to minimize the risk of these
state-of-the-art batteries, there are always safety concerns with Lithium-Ion Batteries. All new portable
electronics, including cell phones and laptops, contain lithium batteries. Rungu batteries use the same
technology but on a much bigger scale. Standard Bearer Machines makes every effort to have the
highest quality battery cells and best battery protection (called a BMS or Battery Management System)
to minimize any risk associated with these bigger batteries.
Standard Bearer Machines uses a battery chemistry that is
popular with production electric vehicles because of its high
energy density. The battery chemistry is the same that large car
manufacturers (such as Nissan) use in their hybrid and electric
vehicles. This state-of-the-art battery chemistry is called Lithium
Nickel Manganese Cobalt (LiNiMnCoO2) or LiNMC for short. The
electric vehicle industry prefers this chemistry due to the
combination of power, safety, performance, and life span
compared to the other options available.
Each battery has a Battery Management System (BMS) built into
the battery to protect you and the Rungu from dangerous battery faults. Lithium cells have a lot of
energy stored in a small package. There is always a possibility a battery cell fault can release this energy
and can cause fire and/or severe injury unless the battery is constantly monitored during discharging
and charging. The state-of-the-art Battery Management System found on all our battery packs do that.
They continuously monitor the cells and pack to avoid failure.
CAUTION: BATTERY PACKS CAN FAIL AS A RESULT OF A BMS FAILURE, PUNCTURE OR DESTRUCTION OF
THE BATTERY PACK, OR ATTEMPTING TO CHARGE, SHORT CIRCUIT, OVER DISCHARGE THE BATTERY
CELLS IN A WAY THAT DOESN’T USE THE PROTECTIONS OF THE BMS.
The main cause of failure in lithium batteries occurs during the charging portion, when cells can be
overcharged.
This is the number one failure and can lead to batteries which vent and eventually release
all their energy at once (or can even cause the battery pack to catch fire). This can happen if the BMS
fails, you try to charge the pack using the output plug instead of the charging plug, or you use a charger
that isn’t designed to charge
lithium-ion batteries. Cells in the battery can fall out of balance and result
in a cell over charging, which leads to a fire. Standard Bearer Machines always recommends
disconnecting the battery and charging it away from the DUALIE.
