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SICHARGE UC 150 UL Plug-in Dispenser | Installation and Operations Manual
8.8 Sequential Charging Concept
When equipped with two or more dispensers, the SICHARGE UC150 kW can charge one EV per
dispenser sequentially.
8.8.1 Bulk Charge / Trickle Charge Scheme
Depending on the battery characteristics, the charging process for a single EV can be prolonged. This
can be problematic during sequential charging for all EVs to be adequately charged. The SICHARGE
UC150 kW DC charger utilizes a bulk charge/trickle charge scheme. The charging process is divided
into two stages. The first stage is a quick-charge process called bulk charging. This charges the
battery with high current until the bulk charge complete level, typically around 80% state of charge
(SoC) but can be set by the customer depending on the battery charging profile. The second stage is
a slow-charge process called trickle charging, which charges the battery to full SoC.
A trickle charge is initiated only when all other EVs have completed bulk charging. The following
flowchart illustrates the bulk charge/trickle charge scheme:
Nothing connected
to Dispensers
Bus 1 plugs into
Dispenser A
NO
Bus 1 going into
bulk charging
through Dispenser A
Bulk Charging
Complete Signal
received?
1. Flag Bus 1 "Bulk Charge Complete"
2. Shut down the Charging Process
Figure 8-17
Bulk Charge/Trickle Charge Flowchart
88
A or B
NO
YES
1. Flag Bus 1 "Trickle Charge Complete"
2. Shut down the Charging Process
Bus 1 connected to Dispenser A
wai�ng for charging and nothing
connected to Dispenser B
Charging request
from Bus 1 (by
rese�ng CP relay)
Dispenser A becomes
the Ac�ve Dispenser
Bus 1
"Bulk Charge
Complete" flag
set?
YES
Bus 1 going into
Trickle Charging
through Dispenser A
NO
Bus 1
Full SoC reached
OR charge �me
expired?
YES
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