Regenerative Battery Pack Test System 17040

System Features

Security – Reinforce Risk Management

• Able to load test, cut-off, and protection criteria to a charging/discharging device directly for execution to achieve multi-layer protection through internal software and hardware
• Able to integrate external hardware to get real-time monitoring parameters from BMS, Data Logger, Chamber, and I/O signals to execute warning/cut-off/ power off protection
• Able to monitor various voltage and temperature values of battery packs through readings from BMS and measurements on Data Logger; also able to perform instant judgment and protection based on set values
• Built-in multiple warning and protection modes : OVP, UVP, OTP, WIR_LOSS, CAL_ERR, POW_ERR, RMT_RVS Precision – Improve Product Quality
• High frequency sampling measurement technology: Max. sampling rate 50kHz to ensure dynamic measurement accuracy
• Voltage accuracy: ± (0.02% of rdg. ± 0.02% of r.n.g.)
• Current accuracy: ± (0.05% of rdg. ± 0.05% of r.n.g.)
• Quick response test technology: 2ms (-90% to 90%) current slew rate applicable for various test applications
• Auto voltage/current range switch function: 4 ranges are varied with current change that will be automatically adjusted to optimize the measurement accuracy
• Support dynamic driving profile simulation (waveform), which simulates the current and power state of real driving conditions to comply with the NEDC, FUDS and HPPC standards Current slew rate Overshoot <1% 2ms (-90% to 90%)

Precision – Improve Product Quality

• High frequency sampling measurement technology: Max. sampling rate 50kHz to ensure dynamic measurement accuracy
• Voltage accuracy: ± (0.02% of rdg. ± 0.02% of r.n.g.)
• Current accuracy: ± (0.05% of rdg. ± 0.05% of r.n.g.)
• Quick response test technology: 2ms (-90% to 90%) current slew rate applicable for various test applications
• Auto voltage/current range switch function: 4 ranges are varied with current change that will be automatically adjusted to optimize the measurement accuracy
• Support dynamic driving profile simulation (waveform), which simulates the current and power state of real driving conditions to comply with the NEDC, FUDS and HPPC standards

High frequency sampling measurement technology

Generally, battery chargers/dischargers use software to read current values for power computing; however, limited data sampling speed could result in large errors when calculating the dynamic current capacity. By increasing the V/I sampling rate and double integrating method, Chroma is able to provide capacity calculation with much higher accuracy. When the current changes, the data is not lost and the transmission speed is not affected.

• V/I sampling rate: 50KHz (per 20μs)
• Integrate calculus: I for capacity; VxI for energy

General charger/discharger sampling rate vs. Chroma charger/discharger sampling rate

Quick response test technology

In quick response mode, the current is smooth without overshoot to avoid damaging the battery

• Current ripple noise <0.5%, Overshoot <1%

Left 2 panels: Overshoot <1% Right 2 panels: Current slew rate 2ms (-90% to 90%)

Dynamic driving profile simulation

Battery packs are used under quick and irregular current conditions. The 17040 system simulates real conditions on the battery pack via the working condition simulator.

• Dynamic charge/discharge power or current waveforms simulate the drive cycle or any real world application. In the dynamic current mode (waveform), the current transition time for maximum discharge and charge requires only 2ms
• Test steps can specify an Excel file from which to read the stored current/power waveform
• 720,000 points of driving profile memory available to save the waveform profile in each channel
• Interval for profile condition changes: 1ms~10sec.

Driving profile simulation, Regulatory compliance testing standards, and Profile simulation data loading equipment

Efficiency – Reduce Operating Costs

• Software and hardware integration and customization capabilities including BMS, Data logger, Chamber, external signals, and HIL (HIL, Hardware in the Loop)
• Provides various signal interfaces for a variety of external devices (CANbus, Ethernet, Analog I/O) to support HIL
• Parallel function within the system up to a maximum of 600kW, 1500A
• Equipped with battery charger/discharger and simulator functions
• Embedded with high efficiency discharge energy regeneration technology

Data logger integration technology

The 17040 system uses software to integrate with the 51101 data logger to read multiple voltage and temperature records which can be used for setting cut-off and protection conditions. The data logger is able to perform sampling simultaneously on each channel, and the data acquisition speed can up to 200ms. Other brands of data loggers can be integrated for use if faster data acquisition speed is in demand. The 17040 system supported by the 51101 data logger has 192 channels.

Discharge energy recycling technology

• Bidirectional circuit architecture to accurately control reverse current change
• Regenerative battery energy discharge (efficiency > 90%.)
• Static regenerative energy: In compliance with regenerative grid standards for solar energy, current THD < 5%, PF > 0.95
• Dynamic regenerative energy: Real-time transient current phase transitions avoid contaminating the grid

• Smooth AC current waveform and real-time phase transition when energy is regenerated to the grid. This prevents other equipment from being affected by false test results or a contaminated grid

Left: Discharge state changes to charge state. Right: Charge state changes to discharge state.

Dual Mode Application

• Charger/discharger mode: applicable to battery pack test via Battery Pro operating interface
• Battery simulator mode: applicable to motor driver/charging pile via Battery Simulator operating interface

Battery Charge/Discharge Software – Battery Pro

The software platform “Battery Pro” when used with the Chroma 17040 conforms to the diversified requirements for secondary battery pack test with high margins of safety and stability. It supports a power failure recovery function to guard against potential data loss.

• Real-time monitoring: Real-time browsing of the system test status without any waiting period. The test data and system integrated data can both be viewed at the same time
• Icon manager: Test status of each channel is managed through different icons, easy to read and understand
• Authority management: Sets the user’s authority for operation
• Fault record tracking: Records any abnormal state for each channel independently Integrated CANbus/SMbus/LIN communications
• Import the Vector.dbc file directly to complete BMS monitoring setup quickly and easily
• Follow the BMS communication protocol to set the message desired
• The BMS data can be set in the conditions for cut-off or protection during testing

Battery Pro main panel, Charge/Discharge test program, Editor Real time monitoring, and Waveform Current test editor.

Integrated CANbus/SMbus/LIN communications

• Import the Vector.dbc file directly to complete BMS monitoring setup quickly and easily
• Follow the BMS communication protocol to set the message desired
• The BMS data can be set in the conditions for cut-off or protection during testing

Battery Pack, Battery Tester, and BMS Status Browse

Battery Simulation Function

The 17040, Battery Charge/Discharge Tester and Battery Simulator, can test battery pack and battery pack connected products. When a product is still under development and the supplier’s battery is not available, the 17040 can simulate the battery to verify whether or not the system is functioning normally. In addition, the 17040 can control the SOC status of different batteries. Users can download different battery curves to the 17040 to test the DUT for charge and discharge status. The 17040 can also perform battery and DUT collocation evaluation tests in advance that apply to the motor driver for vehicle start-stop systems, light EV electric controllers, carmounted chargers, etc.

Battery Pack Protection

• OCP
• OVP
• Battery high voltage/power warning
• Battery low voltage/power warning
• Battery OVP/OPP
• Battery LVP/LPP

Single Channel Bidirectional Power Supply

• Voltage/Current/Power display
• Voltage/Current setting
• Pre-charge function : set the time required to generate voltage

Real Time Test Data Display

• Voltage/Current/Power Value display
• Voltage/Current/Power Picture display
• Battery Pack charge/discharge curve display
• Testing report output function

An optional battery simulator can be used with the 17040 to charge and discharge the bidirectional power supply. In addition, it can be used to set the battery capacity, DCR, and V-SOC curve to be downloaded to the charger, inverter, and motor driver tests via the proprietary software included.

Battery simulator main panel, DCR setting, and Battery characteristics V-SOC curve setting screen.