DLX.0 satisfies every need of modern laboratories, industry and workshops in terms of tests and characterization of cells, batteries and generators. The dissipative method has been chosen because of its relative stability in terms of readout accuracy of the voltage and of the current. Its design has been optimized for already assembled battery packs or for single cells, and can dissipate up to 5kW and can be coupled in a modular combination in order to reach higher power dissipation. The DL1.0 can dissipate up to 1.0kW and is cooled through controlled air flow. The other sizes up to the DL5.0 are respectively designed for 2, 3 and 5kW power dissipation and are basically water cooled. The Graphic User Interface (GUI) gives the user the possibility to test any possible type of cell. Doing so the main SW determines the cut-off voltage to avoid possible over-discharge that depends on cell typology (Pb, NiCd, Litium, LiFePo4, LiPo ecc). All functions are supported by an embedded processor that communicates with an external PC through an USB port. The Graphics User Interface runs under Windows 32/64 and is connected constantly with the ATEC Robotics data center that takes under control the status of the device and for maintenance forecasting. The main SW installed into the PC prints the test certificate autonomously as shown in these pictures. An app that runs under Android OS allows to remotely check the test status.
DLX.0 allows the typical operation modes Constant Current or Dynamic Current (CC), Constant Power (CP) and Constant Voltage (CV). The operating mode is selected through the User Interface (GUI). Other settings are additionally effective to protect the test equipment. For example, the constant current test can have a maximum power setting while constant voltage, power or resistance can have a maximum current setting. The limits are automatically determined by the SW and proposed for approval.
Static and dynamic operations
During static operations one value can be set using the user interface. During dynamic operations the user can define a large set of values in order to achieve steps to all four physical units U, I, P or R.
Battery test mode
During battery test mode, a battery can be discharged with a constant current or with different values until the battery voltage reaches a threshold that depends on the typology of the cells. Then the test automatically stops and a certificate with graphs is produced. The discharge time and dissipated charge (Ah) are measured, displayed and printed.
Units of the series are equipped with thermal derating in order to limit power and avoid overheating when operating in the maximum power range. All models have a thermal derating. For the base model that is cooled through an air controlled flow, the lower the ambient temperature and the better is the cooling, namely the higher the power that the load can dissipate. To circumvent this situation, models with an optional water cooling can be delivered for permanent performance at maximum value and in extreme conditions, namely DL-3.0 and DL-5.0 that can respectively dissipate up to 3 and 5kW.
All important information are directly represented on the GUI. Thus, information about the actual output values or set values for U, I, P,R the actual regulation mode (CV,CC,CP,CR), error messages and settings in the setup menu are clearly available. Similarly, settings of the optionally available digital interfaces will be shown.
Remote Status Check
An Android App is provided with the Dummy Load to remotely verify the status of the current test.
The System is provided with a remote sensing input for ultra precise evaluation of the input voltage even if the system is provided with a computational method of the voltage drop due to the connection cables.
The water cooling replaces the standard fan cooling and has some advantages:
- No hot air exhaust on the device
- Significantly lower noise
- 100% permanent power
• RS232 connection