Precautions and Safety
Corvus Energy batteries are among the safest power sources in the world.
Even with such a safe and reliable battery however, it pays to dot your i's and
your t's. Below you will find all of the data you need to help you
design the safest battery system in the world.
In light of recent events with lithium batteries such as the fire on Boeing's 787 aircraft
with a GS Yuasa battery, Corvus Energy has created a document outlining the ways in
which we have made our batteries the safest lithium battery in the world.
Please download our CORVUS ENERGY SAFETY FEATURES document to learn more about what makes Corvus the safest and most reliable industrial lithium battery on the planet.
The Dow Kokam "Nail Test Videos"
are a dramatic demonstration of just how stable lithium ion polymer cell chemistry really is.
Precautions when using Corvus Lithium Ion Battery Packs
Corvus battery packs contain both lithium ion cells and battery protection
circuits. Both items are sealed in a special water tight container made of a
non-flammable material. The pack has no serviceable parts and should never be
opened or disassembled. Doing so will void the warranty of the battery pack.
1. Charging the Battery
The "constant current/constant voltage" method is used to charge Corvus
Figure 1 - Charge: CC-CV, 0.5C→1.0C, 4.2V, 2.0A cut-off @ 23°C ±3°C
Charge voltage - The maximum charge voltage is 4.2 volts times the number of
series connected cells (please refer to individual operating manuals for the
specific voltage required.) The internal battery management system
will automatically disconnect the battery from charging if this voltage is
Charge current - We recommend a charge rate of 1C or less. Please contact
Corvus if a higher rate is required.
Charge temperature - The battery should be charged at temperatures between
+10°C and +45°C.
Reverse polarity charging - Do not reverse the polarity of the battery while
charging as this will cause the battery to become discharged.
2. Discharging the Battery
Discharge current - The discharge current should be at a rate of 1C or
less. If higher rates are required please consult Corvus.
Discharge temperature - The battery should be discharged at -20°C and
+60°C. Please consult Corvus if you require discharge temperatures
outside of these parameters.
Do not discharge the batteries to less than 2.7 volts per cell. The
internal battery management system will automatically disconnect the
battery from discharging if this voltage is exceeded.
Figure 2 - Discharge: CC, 0.5C→5.0C, 2.7V cut-off @ 23°C ±3
3. Equipment Design
Installing the battery - To avoid damage to the battery pack, make sure that
the battery pack is positioned away from heat sources or the battery charger.
Securing the battery - Make sure the battery has a method to secure it in place
to prevent damage from motion.
Short circuits and reversal conditions - Use an insulated terminal structure
that prevents shorting of the terminals by outside metallic objects. Ensure the
battery pack is connected in the correct polarity.
Corrosion prevention - Ensure the terminals are adequately protected from
external corrosion potential.
4. Storing the batteries
The batteries should be stored at room temperature at a 50% state of charge.
5. The chemical reaction
Corvus batteries are based on particular chemical reactions and their
performance will very slowly deteriorate over time. The various usage conditions such as
charging, discharging, ambient temperature, etc. all have an effect on cycle
life. If eventually the batteries cannot maintain an adequate charge then this may
indicate it is time to change the battery.
SAFETY When using Corvus lithium ion battery packs
1. When Using the Battery
Misusing the battery may cause it to get hot , rupture or ignite and cause
serious damage and/or injury.
Do not place the battery in fire or near a heat source.
Do not install the battery backward so that the polarity is reversed.
Do not short circuit the terminals of the battery.
Do not store the battery with metallic objects that may cause a short circuit.
Do not pierce the battery with any metallic object, strike the battery with any
instruments, step on the battery or otherwise subject it to strong impacts or
Do not solder or weld directly onto the battery.
Do not disassemble or modify the battery. The battery contains safety and
protection circuitry which, if damaged, may cause the battery to generate heat,
rupture or ignite.
Immediately discontinue use of the battery if the battery emits an unusual
smell, feels hot, changes colour, changes shape or appears abnormal in any way.
Contact Corvus immediately if any of these problems occur.
1. While Charging
Be sure to follow the rules listed below while charging the battery. Failure
to do so may cause the battery to get hot, rupture or ignite and cause serious
damage or injury.
When charging the battery, use a specified battery charger or otherwise
ensure that the battery charging conditions specified by Corvus are
Do not place the battery in or near fire or a heat source. If the battery
during charging the internal safety electronics will disconnect the battery
from the charger.
Do not continue charging the battery if it does not recharge within its'
specified charging time. Please contact Corvus if this occurs.
The temperature range over which the battery can be charged is +10°C to
Charging the battery at temperatures outside of this range may harm the battery
performance and reduce its' cycle life.
2. While Discharging
Do not discharge the battery using any device except for its intended use.
If the battery is used for purposes aside from the specified use, it may damage
the performance of the battery or reduce its life cycle. In addition, excess
current may cause the battery to overheat, rupture, ignite or cause
The temperature range over which the battery can discharged is -20°C to
Use of the battery outside of this range may damage the performance of the
battery and reduce its' cycle life.
If you have any precautionary or safety concerns regarding Corvus batteries,
please contact us at firstname.lastname@example.org and we will be happy to help.