Application | JHCTECH Assists a Major Chinese Player in Energy Storage to implement EV charging mobile system
In recent years, with the continuous acceleration of the electrification process, new energy vehicles have become more and more popular; according to the "New Energy Vehicle Industry Development Plan (2021-2035)", by 2025, sales of new energy vehicles will account for 20% of total vehicle annual sales. The rapid development of new energy vehicles has increased the demand for charging piles, combined with the support of policies such as "new infrastructure" and "steady growth" so that the market size of new energy charging piles has increased from 7.2 billion RMB in 2017 to 41.87 billion RMB in 2021. The market size is expected to reach 80.96 billion RMB in 2022.
Pain Points of Fixed Charging Pile Industry
With the rapid growth and popularization of new energy vehicles, their supporting charging infrastructure has also attracted more and more attention. Problems such as difficulty in charging, mileage anxiety, and difficulty setting up charging piles in residential areas are still the pains of most new energy vehicle users! Some new charging products have emerged in response to these pain points and different application requirements scenarios. Recently, the mobile energy storage charging vehicle built by a Chinese central state-owned enterprise assisted by JHCTECH has been successfully implemented.
The development and application of the multi-functional mobile energy storage system is an exploration of adding new equipment to the distribution network's application scenario. The new mobile charging vehicle created by JHCTECH and its partners helps a Chinese central state-owned enterprise in China to complete uninterrupted emergency power supply operations. It can timely connect with the demand changes of power-consuming equipment, finally, achieve seamless switching between mains and energy storage batteries.
The multi-functional energy storage charging vehicle integrates an intelligent mobile energy storage system with a microgrid, battery, power converter, measurement and control, and human interface. It combines a variety of advanced technologies such as "seamless switching between micro-grid and off-grid," "plug and play," "high-efficiency converter," "battery thermal management and safety optimization technology," etc. It meets the application requirements of multiple scenarios, such as emergency power supply, emergency repair, temporary power supply, non-stop maintenance, dynamic capacity expansion, power quality management, mobile charging, and discharging, and it provides flexible green power services. In addition, the multi-functional mobile energy storage system can participate in peak cutting and is compatible with V2G (Vehicle to Grid) mode. It can charge new energy vehicles anytime and anywhere and supply power to mobile communication base stations.
Key technologies of Mobile Energy Storage Charging Vehicle
Energy storage is the primary key technology of mobile charging vehicles; BMS (Battery Management System) is the core management system of energy storage. The main management object of BMS is a secondary battery, such as an energy storage lithium battery, to improve the battery's utilization rate and prevent the battery from being overcharged and over-discharged. Once overcharged or over-discharged, the battery performance will be damaged, such as reduced capacity, reduced lifetime, and so on. In severe cases, explosions and fires may also occur. The above situation is caused because the parameters of the single cells are inconsistent. If the charging and discharging processes are not effectively controlled, the difference in these parameters will be further amplified, thereby damaging the battery.
It can be seen that BMS is indispensable in battery energy storage and is crucial in mobile energy storage applications where multiple battery packs are combined. In this project, JHCTECH Industrial Acquisition Controller KMDA-5920 is the central control of mobile energy storage BMS, providing strong support for mobile multi-functional energy storage charging vehicles!
Advantages of KMDA-5920 as BMS master
◆ X86 architecture Intel Core multi-core high-performance CPU, which perfectly undertakes the computing power of BMS master control: collect and analyze data, output control signals, and estimate battery states through algorithms, including state of charge (SOC), depth of discharge (DOD), state of health (SOH), state of function (SOF), state of energy (SOE), state of installation (SOS), etc., provide the basis for vehicle state management and energy distribution;
◆ Integrated multi-channel CAN-BUS field bus, 2.5 kV photoelectric isolation, to ensure the reliability of communication with each inspection module;
◆ Support online software and hardware fault diagnosis, such as overvoltage, undervoltage, overcurrent, internal short circuit and insulation resistance reduction of the battery pack itself;
◆ Effective thermal management: According to the temperature distribution in the battery pack and the charging and discharging requirements, the intensity of active heating or heat dissipation is determined so that the battery can work at the most suitable temperature as much as possible and give full play to the performance of the battery;
◆ Battery safety control and alarm. Including thermal system control and high-voltage electrical safety control. After the BMS diagnoses the fault, it notifies the vehicle controller or sound and light alarm through the CAN bus, and it can be dealt with in time to prevent the battery or personal injury caused by high temperature, low temperature, overcharge, over-discharge, overcurrent or leakage;
◆ Reliable storage: The operating system disk and the data disk are separated to ensure the system disk's reliability and the data disk's security. The data disk can be used to store critical data, such as SOC, SOH, SOF, SOE, cumulative charge and discharge time, fault codes, and consistency;
◆ The main control adopts a fanless heat dissipation design, wide voltage DC power supply, and flexible installation method, suitable for the vehicle application environment.
Product Features of CANbus Function Module (ECB-260)
◆ Support CAN 2.0B compatible with 2.0A, conform to ISO/DIS 11898-1/2/3 standard
◆ Support baud rate programmable setting 10Kbps~1000Kbps optional
◆ The maximum transmission and reception frame flow of a single channel can reach 7000 frames/s
◆ Two CAN ports, each Can channel independent 2500VDC photoelectric isolation
◆ Onboard 120Ω load resistance
◆ The driver supports Windows and Linux operating systems
◆ Support VC, VB, C#, Labview and other secondary development environments
◆ Support loading vehicle DBC files, CANopen protocol, J1939 protocol
◆ Support wide temperature -40℃ to 85℃, aluminum rectangular profile shell, fanless heat dissipation, reinforced structure design
Over the past 20 years, JHCTECH has always adhered to the business philosophy of "focusing on the industry, proficient in products, and superior to services," serving customers with high-quality products and unlimited creativity and creating personalized application solutions for different industries across the country. In the future, JHCTECH will continue to gather cutting-edge technological innovations to continue to help the high-quality development of new energy.
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