What type of maintenance do Corvus batteries need?
None - ever.
What is the chemistry used in the batteries?
The Corvus Energy lithium ion batteries are based on a patented NMC chemistry.
This allows for up to 4 times higher energy density compared to lead acid
batteries. The lithium chemistry used by Corvus Energy is considered one of
the safest available.
How safe is the lithium ion battery from Corvus Energy and what are the safety
The NMC chemistry is considered one of the safest lithium batteries available.
Additionally Corvus Energy has integrated a unique Battery Management System
(BMS) that manages voltage, current and temperature in order to keep the
battery in a safe working mode at all times. The battery is equipped with a
CanBus communication port, controlling external system
components to create an inherently safe system.
Do the batteries need cell balancing?
Corvus Energy has integrated cell balancing in the battery as a standard. This
provides peak performance of the battery system and maximizes it's life cycle.
How does the cell balancing from Corvus Energy work?
The Battery Management System (BMS) of Corvus Energy is a proprietary system which
works automatically to equalize all cells in a pack. Electronics transfer any
excess of energy from above specification cell to the below specifications
cells in the battery pack. With the BMS system not only is the battery kept
safe but more usable capacity is provided.
Does the Corvus Energy lithium ion battery require any special handling?
No, the battery itself does not require any special handling. With each system
Corvus Energy will approve external user connections.
What is the voltage and capacity?
The Corvus Energy lithium ion battery can be configured in a number of voltage
specifications up to 96 volts nominal as required by the customer. Standard
capacity is rated at 6.5 kW-hr nominal.
Can the lithium ion be paralleled to create bigger battery banks?
Yes, due to the integrated BMS system, there are no restrictions in paralleling
Can the lithium ion be connected in series to create a high voltage pack?
Yes, due to the integrated BMS system it is possible to connect multiple
battery modules in series, to create a high voltage pack.
Please contact Corvus Energy for applications in the range of 260 to 600V.
What is meant by a 1C discharge or charge rate?
The C rate for charge or discharge is simply the amp-hour rating of the battery
normalized to a value quoted at 1C. For example, a 200 amp-hour rated 12V
battery, being charge at a 1C rate, would require a charger capable of
delivering 200 amps at 12 volts and would charge the battery in one hour. A 2C
charge rate would be 400 amps and would charge the battery in 0.5 hour. One of
the significant advantages of the lithium batteries over lead acid is their
inherently high C rate for charging.
Will the batteries support high discharge rates?
The specification of the Corvus Energy batteries is a maximum discharge rate of
10C. Higher discharge rates may be possible with consultation to the particular
application with Corvus Energy.
Will the batteries accept high charge rates?
The recommended maximum charge rate is 2C (1/2 hour) for long battery life, but 3C (20 minutes) may be allowed depending on
the available charging system. All charge functions will be controlled and
supervised by the BMS.