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Power Battery PACK Test System

WBTS Series

The WBTS Series Test System is specially developed for charging, discharging, operating-condition simulation, and other tests of power battery packs. It incorporates core technologies such as four-quadrant PWM rectification, bidirectional BUCK conversion, and fully digital control, featuring bidirectional energy flow, up to 100% energy feedback, high precision, fast transient response, high conversion efficiency, low grid pollution, comprehensive communication interfaces, and robust protection functions.

The system converts AC power to DC power to charge the battery pack and feeds the discharged energy back to the grid through a grid-connected inverter, enabling energy recovery and reuse. Controlled by PC-based software, the WBTS Series provides a bidirectional energy-feedback power processing solution for battery pack charging and discharging tests.

Voltage Accuracy

±0.05% F.S.

Current Accuracy

±0.05% F.S.

Input Impedance

≥1MΩ

Overall Efficiency

≥93%

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  • Product Description

  • Product Features

Key Advantages

  • 01
    Four-Quadrant PWM Rectification

    High power factor and low harmonic distortion for minimal impact on the electrical grid.
  • 02
    High Power Quality

    Power factor >99% and harmonic distortion <3%.
  • 03
    High-Performance DSP Control

    Dual closed-loop control ensures safer, more stable, and reliable operation.
  • 04
    Independent Air Duct Design

    Enhances equipment heat dissipation and adaptability to harsh operating environments.
  • 05
    Standalone Operation

    Equipped with a touchscreen and data storage unit, the system can operate independently without a PC.
  • 06
    Modular Design

    Each module operates independently for easy maintenance, with centralized system management and control.
  • 07
    Flexible Configuration

    Charging and discharging channels and power levels can be customized to meet specific testing requirements.
  • 08
    Scalable Parallel Operation

    Multiple channels can be connected in parallel for easy capacity expansion and higher testing efficiency.
  • 09
    System Integration

    Supports integration with other test equipment, including temperature chambers, vibration tables, and voltage and temperature acquisition systems.
  • 10
    BMS Communication

    Supports convenient data exchange and control with the BMS via CAN communication using customer-provided DBC files.
  • 11
    Comprehensive Testing Functions

    Supports capacity, cycle life, rate capability, HPPC, charge/discharge efficiency, DC internal resistance, operating-condition simulation, and other battery performance tests.

Models & Specifications

Model

Output voltage

Output current

Output power

WBTS-050-1000

Charge and discharge: 24-1000V

-200A~+200A

50KW

WBTS-080-1000

-300A~+300A

80KW

WBTS-160-1000

-500A~+500A

160KW

WBTS-200-1000

-500A~+500A

200KW

WBTS-250-1000

-600A~+600A

250KW

WBTS-300-1000

-600A~+600A

300KW

WBTS-400-1000

-800A~+800A

400KW

WBTS-500-1000

-1000A~+1000A

500KW

*Note:

  1. Output voltage can be selected from 24V-800V or 24V-1200V or 48V-1500V;
  2. Output channel number, output current and output power can be customized according to customer requirements.*

Technical Specifications

Category Item Specification
Input AC Input 390V ±15%, three‑phase three‑wire plus protective earth system, 50Hz±5Hz; THDi≤3%, PF＞0.99
Basic Output Output Voltage Charge / Discharge: 24V~1000V; Note: customizable 48V~1500V, ≤0.1% F.S.
Voltage Accuracy ±0.05% F.S.
Current Accuracy ±0.05% F.S.
Sampling Resolution AD: 16‑bit
Input Impedance ≥1MΩ
Overall Efficiency ≥93%
Timing Response Step Time Range ≤(365×24) hours per step
Charge‑Discharge Response Time (10%~90%) ≤10ms
Charge‑Discharge Transition Time (−90%~90%) ≤20ms
Charging Charging Modes Constant‑Current Charging, Constant‑Voltage Charging, Constant‑Power Charging, Constant‑Current Constant‑Voltage Charging
Cut‑off Conditions Voltage, Current, Time, Capacity
Discharging Discharging Modes Constant‑Current Discharging, Constant‑Power Discharging, Constant‑Resistance Discharging, Constant‑Voltage Discharging
Cut‑off Conditions Voltage, Current, Time, Capacity
Cycle Test Cycle Test Range 1~65535 cycles
Number of Steps per Single Cycle 254 steps
Nested Cycles Supports nested cycle function, maximum 3‑level nesting
Other Functions Other Functions Internal resistance test, capacity test, working‑condition simulation test, offline test support; self‑check protection (contactor fault, transformer over‑temperature, A/D channel damage, IGBT damage, etc.)
Protection‑Software Protection Software Protection Configurable safety protection conditions; software over‑voltage protection, software under‑voltage protection, software over‑current protection, software under‑current protection, auxiliary temperature protection, auxiliary voltage protection. Protection voltage and current values are configurable; channel protection events can be displayed and logged in the list
Protection‑Hardware Protection Hardware Protection Emergency stop protection, reverse‑connection prevention protection, short‑circuit protection, offline protection, power‑failure data preservation
Structure & Environment Protection Class IP21 (indoor use)
Cooling Method Forced air cooling
Channel Control Mode Independent control; channels support parallel connection
Noise ＜75dB
Data Communication Database Centralized test data management via MySQL database
Upper‑computer Communication Method TCP/IP protocol based
Data Export Formats EXCEL, TXT, charts
Human‑Machine Interaction Human‑Machine Interaction Color touch screen / PC
Communication Interfaces RS485 / LAN / CAN
Operating Environment Operating Temperature −10℃~45℃
Humidity ＜90% (non‑condensing)

Applications

  • High-Current Battery Charge/Discharge Testing

  • Battery Module Production Testing

  • Power Battery Charge/Discharge Testing

  • Battery Module Maintenance

  • EV R&D and Production Testing

Powerful Software Functions

Comprehensive test functions and user-friendly step editing interface; supports output functions such as constant current charge/discharge, constant voltage charge/discharge, constant resistance discharge, constant power charge/discharge, working condition simulation, fast pulse, DCIR, etc. It can also charge and discharge the battery pack by arbitrarily combining various modes and switch quickly.

It features programmable data input/output, and can display various real-time data of the battery pack (voltage, current, power, energy, capacity, etc.); the charge/discharge process data supports automatic upload, automatic processing, real-time analysis, and is equipped with corresponding process data analysis charts.

Rich and comprehensive recording modes, including detailed data such as cycle layer, step layer, record layer, process documents, channel logs, curves, etc.; arbitrary combination curve display function, allowing users to customize the X-axis and Y-axis, facilitating users to analyze the correlation between various parameters, and optionally quickly export parameter files in Excel format.

Simulation of Actual Working Conditions

The on-vehicle real-world operating condition data can be converted into a simulated and emulated test process, enabling working condition simulation tests on the power battery pack, helping users develop their own unique test conditions.

*Current changes when the vehicle accelerates or decelerates during driving*

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