Lithium Battery System Features
Automatic low voltage load disconnect
Unlike lead-acid batteries, the voltage of a lithium battery bank doesn't change proportionally to the charge level. A sophisticated system needs to be in place to closely monitor the batteries and prevent them from being overly discharged. Without an automatic low voltage load disconnect, it would be easy to damage the batteries by accidentally "crashing" them or draining them too deeply.
Automatic high voltage charger disconnect
Similar to the low voltage disconnect, lithium batteries can be damaged by overcharging. A sophisticated system needs to be in place to closely monitor the batteries and prevent them from being overcharged.
Automatic low temp charger disconnect
Lithium batteries can be ruined when charged at temperatures below 0 degrees C. The more charging current and the lower the temperature, the more extensive the damage. Therefore, it is important to have a system in place that monitors battery temperature and disconnects all charging sources before the batteries freeze.
Automatic high temperature disconnect
Lithium batteries can absorb and discharge a tremendous amount of current compared to lead-acid batteries. This high current leads to heat, which can cause damage to the batteries. It is important to have a system that shuts off all loads and charging sources when the batteries get too hot.
Allow safe discharge during low temp disconnect
As mentioned above, it can be harmful to lithium batteries to charge when they are frozen. But, discharging is fine. High quality lithium battery systems are capable of separating charging and discharging sources to allow a safe use of loads when the batteries are frozen.
Automatic reset when conditions return to normal
Some early lithium battery systems require a manual reset after a high voltage, low voltage or low temperature disconnect. More sophisticated systems do this automatically.
Access individual cell status via Bluetooth
The ability to access data on the voltage and temperature of individual cells can be important tool for monitoring and troubleshooting a lithium battery system.
Separate charge/discharge status Indicators
Being able to monitor the separate status of charging and discharging functions of a lithium battery system can be important for troubleshooting.
Custom BMS programming available
The AMS Lithium Control Module is a programmable circuit board designed by AM Solar. Many of its parameters can be customized by AM Solar to suit a variety of unique end-user needs.
Externally serviceable management system
Lithium battery systems are expensive and complicated. With the higher price tag comes superior performance and a longer lifespan. This high performance, mixed with high complexity, means that a lot can go wrong. With an externally serviceable management system, small components that malfunction can be cheaply be replaced, whereas if something where to go wrong with an integrated battery management system, the entire expensive battery would have to be replaced.
Networked complete system communication
When the lithium batteries, the charge controller system, the inverter system, and the battery management systems are all the same brand they function more seamlessly and there are a wider variety of user-friendly monitoring options.
Lithium batteries with external management systems can be very challenging for an end-user to install. Drop-in ready lithium battery systems are as easy to install as lead-acid batteries.