Stack Current Limits - Nuvation Energy NUV300-BC-12 Product Manual

stack_control.connect_delay
▪
The delay between current limits engaging and the contactors connecting after a connect
request
▪
This delay is important for systems using pre-charge
▪
When pre-charge is used the delay must be a minimum of one second and is limited to 10
seconds maximum, otherwise the delay should be set to zero
stack_control.disconnect_delay
▪
The delay between current limits disengaging and the contactors disconnecting after a
disconnect request
▪
This delay is important to allow a PCS time to ramp down before the BMS opens the contactors
▪
This delay should not be less than one second and is limited to 10 seconds maximum
The disconnect switching delay only applies to disconnect requests. Under a fault condition, the stack
is disconnected immediately.

7.6.2. Stack Current Limits

7.6.2.1. Maximum Operating Currents
The maximum continuous operating charge and discharge currents must be configured for current
limiting to function properly. These values correspond to the current limit values that will be used
during normal wide-open operation (i.e. no throttling).
stack_current_limit.max_charge_current
▪
Magnitude of maximum continuous operating charge current
stack_current_limit.max_discharge_current
▪
Magnitude of maximum continuous operating discharge current

The current limits given above are magnitudes only—i.e. both charge and discharge
current limits are positive.
7.6.2.2. Minimum Charge Current
The minimum charge current is the constant charging current that should be applied as the battery
reaches the end of its charge cycle. The BMS will ensure that the charge current limit does not fall
below this minimum value until the battery has reached its maximum charging voltage.
stack_current_limit.min_charge_current
▪
Minimum charge current to be applied at the end of charge cycle
▪
Set as per battery manufacturer recommendations (typically below C/20)
This setting must be configured in conjunction with the full thresholds defined by
example, the stack can be considered full once the current limit reaches the minimum charge current.
Document ID: NE-PM-002
Nuvation Energy Low-Voltage BMS - Product Manual
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Stack Capacity. For
Rev 1.2, 2021-03-03
Curie Update 1