The PrintCart is the only mobile printer station designed to protect your investment. The PrintCart uses deep cycle batteries typical of the Marine industry. The deep cycle battery has less instant energy but greater long-term energy delivery. The life cycle of the battery is extended if the depth of discharge is limited. The charge cycle is another critical element to maintaining battery health. Our smart controller manages both the depth of discharge and the charge cycle to enable the longest battery life cycle while maximizing the up-time for PrintCart’s service.
Our smart self-defending controller uses computer technology to perform a 3 step charging technique. The first step is bulk charging where up to 80% of the battery energy capacity is replaced by the charger at the maximum voltage and current amp rating of the charger. When the battery voltage reaches 14.4 volts this begins the absorption charge step. This is where the voltage is held at a constant 14.4 volts and the current (amps) declines until the battery is 98% charged. Next comes the Float Step. This is a regulated voltage of not more than 13.4 volts and usually less than 1 amp of current. This in time will bring the battery to 100% charged or close to it. The float charge will not boil or heat batteries but will maintain the batteries at 100% readiness and prevent cycling during long term inactivity.
The PrintCart can support operating durations from 8, up to 20 hours in a 24 hour cycle. The maximum single charge operating time depends on battery capacity and equipment power consumption (idle power, peak power & duty cycle for all equipment). It is important to note that battery capacity will degrade over time & use. Typically, a battery at the end-of-life, will have only 70% of its original capacity.
Continuous 24 hour operations are possible by exchanging optional battery sub-pallets and using an external charger.An amp-hour (AH) is a rating found on deep cycle batteries. If a battery is rated at 100 amp hours it should deliver 5 amps for 20 hours, 20 amps for 5 hours, etc. The PrintCart comes with 2-100Ah batteries for a capacity of 200Ah.
See this chart to estimate the life for your application.
The best practice is to charge whenever the cart is stationary for a period of time and near a line power receptacle, regardless of state of charge.
Any time the battery monitor display flashes. A slowly flashing monitor is an indicator that the battery is nearing its maximum discharge and charging should become a priority as soon as the current task is completed.
If the warning timer expires and the audible alarm sounds, the cart has enters a terminal shut down phase and needs to be plugged in immediately. The internal self defending controller will shut off battery power to the cart in a very short time.