Energy Recovery Battery Module Test System Model 17040E

The Chroma 17040E Battery Module Test System is a high-precision, safe and efficient charging and discharging device developed for high-power secondary battery pack testing. Key features include high power, voltage and current measurements for renewable energy, scalable channels, parallelizable channels, battery applications, and high accuracy for drive cycle simulation.

accurate

Accurate Measurement to Improve Product Quality

With automatic voltage/current gear switching function, which can be divided into several gears, with the dynamic change process of large or small current, automatically adjust the correct gear to achieve the optimization of measurement accuracy.

• Voltage accuracy: ± (0.02% of reading ± 0.02% of full scale)
• Current accuracy: ±(0.05% of range)

▲Automatic voltage file position

▲ Automatic current gear

High-frequency sampling to accurately intercept battery pack capacity

The fastest sampling rate of the high-frequency sampling measurement technology is 50kHz, which ensures the accuracy of dynamic measurement. Generally, battery chargers and dischargers use software to read the current value directly for capacity calculation, but the data reading speed of the software is limited, which may cause too much error in the capacity calculation of dynamic current. 17040E provides accurate capacity calculation by increasing the sampling rate of V/I and the two-time integration method, which does not miss the data when the current is changing, and is not affected by the data transmission rate.

• V/I sampling rate 50kHz (one sample every 20μs)

▲ Chroma Charger/Discharger Sampling Speed Schematic

▲ Schematic diagram of sampling speed of other chargers and dischargers

Rapid Response Testing Technology Validates Battery Pack Limits

Chroma 17040E supports dynamic operating conditions simulation (Waveform) test function, simulation of actual driving conditions of the current or power state, support for NEDC, FUDS, HPPC and other regulatory standards, in the rapid response to the current at the same time, to achieve the optimization of the charging and discharging mode switching control, and switching process without current surges, the test process will not damage the object to be tested.

• Current switching time: 2ms (-90% to 90%)

▲ Discharge to charge
Current creep < 2ms (-90% to 90%)

▲ Charge to Discharge
Current creep < 2ms (-90% to 90%)

Dynamic condition function simulates the real battery pack usage state

The actual use of the battery pack is fast and irregular current charging and discharging state, the work simulation of the battery pack for the actual dynamic current waveform charging and discharging, to verify that the battery pack in the real state of response, Waveform work step can be set to read the specified computer to store the current / power waveform Excel file.

▲ Simulates actual driving conditions

▲ Conforms to regulatory test standards

▲ Simulation data loading equipment for working conditions

safety

Bi-directional circuit architecture protects the power supply

Adopting bi-directional circuit architecture to achieve high-efficiency discharge energy recovery, precise control of positive and negative changes in AC current, smooth AC current waveforms and real-time phase change, and the design meets the requirements of the power grid will not pollute other equipment on the power grid, and measure the abnormalities of the power grid, the active cut-off of the main circuit power supply to protect the safety.

• Energy Recovery Efficiency >93%
• THD <3%
• PF >0.99

▲ Discharging state to charging state

▲ Charging state converted to discharging state

Safe energy recovery design protects personnel (optional)

The VDE test requirements, in short the main items to be taken into account when a generator is connected to the low-voltage distribution network at the grid side, maintain the safety and reliability of the grid operation in accordance with the requirements of the German Energy Industry Act and comply with the voltage limits of the DIN EN 50160 regulation, even in the event of equipment growth.
The optional unit meets the test requirements of VDE-4105-AE with protection features:

• Voltage protection:
  • V < 0.8Un
  • 1.1Un
  • 1.15Un
  • < 0.2s
• Frequency protection:
  • f < 47.5 Hz
  • 1.5Hz
  • <0.2s
• Islanding protection: < 5 sec.

Multiple Power Output Protection for Risk Management in Battery Module Testing

The 17040E meets the test requirements of secondary battery packs with high stability and safety. When an abnormal condition is detected, the charge/discharge protection aborts the test and loads it directly into the charger/discharger for execution, and achieves multi-layer protection through the internal firmware/hardware, with a number of built-in alarms/protection modes.

• Voltage protection:
  • overcharge voltage
  • overdischarge voltage
  • voltage variation
• Current protection:
  • overcurrent
  • overcapacity
  • Amount of current change
• Other protections:
  • overheating
  • automatic disconnection protection
  • overpowering
  • CC-CV Transition Time
  • DC output insulation abnormality protection (optional)

Integrated hardware and software security to protect the cells in the battery module (optional)

Integrating third party hardware through Chroma's BatteryPro software, the charge/discharge protection will abort the test when abnormal conditions are detected. With Chroma's specified data logger, the voltage and temperature of multiple single batteries can be read during the charging/discharging process, and the measured data can be used for setting the protection conditions; with Chroma's specified Battery Management System (BMS) Data Acquisition Device, the BMS data can be read during the charging/discharging process through the communication interface such as CANbus/RS485, and the data can be converted into the protection; With Chroma's specified digital I/O data acquisition card, it can perform signal start-up and shutdown control of high side drive/low side drive, and support five kinds of action behavior: signal output (DO), signal reception (DI), channel protection output (Safety channel output), external device trigger reception (Safety input), and control the digital I/O signals. To achieve alarm/cutoff/power-off behavior.

• Measurement data protection for data loggers
• Measurement Data Protection for BMS Data Acquisition Devices
• Signal control for digital I/O data capture cards

high efficiency

Multiple control commands to flexibly expand the test system

Users can develop their own application software with SCPI commands, Labview drivers, Labwindow drivers and CANbus commands to operate the 17040E Energy Recovery Battery Module Test System, or customize and integrate it into the battery pack automated test system architecture through Chroma's powerful integration capabilities. Provides a variety of external signal interfaces (CANbus, Ethernet, Analog I/O) to support hardware-in-the-loop (HIL) test platforms. Equipped with analog VCU (Vehicle Control Unit) line, combined with UDS and BMS communication, can send diagnostic service ID for battery module relay control.

Flexible and diverse configuration applications

The 17040E offers 2 model options: 17040E-1700V and 17040E-850V.

Power Stage Synchronized Parallel Technology for High Power Charging (HPC) Applications

Chroma 17040E uses parallel synchronization technology for high power testing to achieve synchronized current creep without delay, no delay in rise time between the main and subsidiary channels, no current step waveform generation, up to two devices of the same type can be connected in parallel, the channels can be operated independently or in parallel, and customized fixtures are provided to enable the output channels to be used in parallel.

• Maximum power over 1.6MW, maximum current 4,800A
• Current rise time of 1ms (10%~90%) at rated power <600kW in dynamic current mode (waveform)
• In dynamic current mode (waveform), current rise time is 10ms (10%~90%) when rated power is 800kW~1.6MW or more.