BLU-D Series Overview
Battery Capacity Tester / Discharge Tester BLU-D Series is the latest DV Power solution for comprehensive battery capacity measurement and full battery discharge. This universal instrument is applicable to any battery string (lead-acid, lithium-ion, nickel-cadmium based or other) with voltages up to 1020 V DC.
BLU-D Series provides all options and features of BLU-C Series. Key test parameters can be monitored (graphically and numerically) on 7-inch touch screen display during the discharge process. The instrument also enables the measurement and monitoring of cell parameters (voltage/intercell voltage/temperature), which makes it a complete stand-alone discharge tester .
Besides the battery discharge test, BLU-D Series can be used to discharge a battery, completely and efficiently, down to 0 V. Such total discharge is applied to Li cells at the end of their lifetime, as the initial step of the recycling process. More information about this topic can be found on this article How to Use Battery Load Units in Process of Repair or Recycling of EV Batteries?
Transport of Li battery systems, due to safety reasons, requires batteries to be discharged down to 30%. BLU-D Series provides special discharge mode enabling batteries to be discharged to the customer predefined voltage level.
BLU1000D & BLU1000DZ Models
BLU-D Series includes 2 models: BLU1000D and BLU1000DZ.
Both models provides all features and options of the BLU-C Series, including discharge down to 0 V. The difference is related to the battery discharge below 5 V:
- BLU1000D will discharge the battery by selecting minimum resistance (and current will decrease as the voltage decrease), and
- BLU1000DZ, having built-in Zero Voltage Discharge (ZVD) module, can provide constant current discharge (up to 50 A) down to 0 V.
BLU1000 is a high rate discharge tester (up to 120 A / up to 15 kW) providing maximum discharge power on wide battery voltage range (125 – 1020 V DC), as presented on Voltage / Current diagram below:
BLU-D Discharge modes
A user can select one of four discharge modes:
- Constant current
- Constant power
- Constant resistance
- Constant voltage
BLU-D enables setting the discharge current up to 120 A, with 0,1 A resolution. If higher currents are required, up to 10 x BLU-D units can be connected in parallel.
Additionally, different battery duty cycles can be simulated using user-selectable discharge profiles.
The battery discharge test can be carried out without disconnecting the battery from the load it supplies, by using external current clamp to measure the total battery current or the load current. This way batteries can be tested while they are online.
The capacity tester is compatible with DV-B Win software. Therefore, the user can view detailed numerical and graphical presentations of key parameters and create reports in various formats.