oneProject Background

With the rapid development of batteries in areas such as backup power, energy storage, and new energy vehicles, the demand for batteries in the market is growing rapidly, and the market size of the battery safety management industry is also expanding rapidly. The Battery Management Unit (BMS), as an electronic component for real-time monitoring, automatic balancing, and intelligent charging and discharging, plays an important role in ensuring safety, extending lifespan, and estimating remaining power. It is a key component in power and energy storage battery packsIt is an important component that ensures the safe and stable operation of the system through a series of management and control measures. BMS has been widely used in various industries such as electric vehicles, energy storage power stations, electric vehicles, robots, drones, IoT smart homes, etc.

To ensure the reliability of BMS, improve its platform's continuous working time and safety, detailed simulation testing of BMS is required. This simulation testing system is a product developed for energy storage BMS, which can simulate and test functions such as overcharging, overdischarging, overheating, overcurrent, and balancing of BMS modules.

Yingyue Electronics, with years of testing experience, has launched a series of productsindustry and commerceEnergy storage BMS testing systemIt can be widely used in BMS manufacturers, power and third-party testing institutions.

2、 Requirement response

Requirements Analysis

According to the newly released GB/T 34131-2023 "Battery Management System for Electric Energy Storage" technical standard requirements, the test items that can be completed are shown in the following table:

GB/T 34131-2023 Battery Management System Test Item Correspondence Table

3、 System Overview and Process Description

System Overview:

Yingyue Electronicsindustry and commerceEnergy storage BMS testing systemMainly composed of high-precision multi-channel battery simulator, programmable high-voltage direct current source, high-precision constant current source, programmable resistance box, CAN communication card, programmable IO card, debugging computer, etc., used for room temperature testing and testing process testing of BMS products. All machines are installed in a standard 32U cabinet, with a single cabinet size of 600mm * 800mm * 1514mm (W * D * H) including wheels and 600mm * 800mm * 1425mm (W * D * H) excluding wheels. The weight of a single cabinet does not exceed 550kg per square meter. The overall electrical load of the system during full load operation is ≤ 20kW.

This testing system meets the requirements of users to complete parameter tests such as product voltage accuracy testing, current accuracy testing, temperature calibration testing, balance testing, and protection testing. Automatic testing software generates test reports based on the content of product testing.

System features:

• Single cell voltage simulation, single cell current simulation, and single cell internal resistance simulation;

• Support active and passive battery balancing;

• Support temperature signal simulation and insulation resistance simulation of high-voltage systems;

• Simulation of battery charging and discharging curves;SOCCurve simulation;

• Simulation of total charging and discharging voltage and total charging and discharging current;

• IOSignal simulation, Hall sensor output simulation, shunt output simulation;

• Static power consumption test;

• Optional battery cell fault injection function, including: output short circuit, output open circuit, series connected channel open circuit, sampling line open circuit, etc;

• Capable of electronic management of testing fixtures, efficiently controlling the condition of fixtures;

• Internal modular design and self inspection function, high reliability;

• Support the extension of external standard instruments and customization.

System diagram:

Software interface:

The battery model editing interface mainly meets the needs of customers to edit simulated battery models, including battery cell models, battery pack models, temperature models, etc. The test plan configuration interface is used to configure the battery simulator to output battery models, and can also set temperature simulation information for each channel.

▲ Automated testing interface

▲ Single cell setting interface