When handling conflicts in concurrent multi-protocol communication, portable charging pile testers require a systematic solution encompassing hardware architecture, protocol parsing logic, timing control, error handling mechanisms, and testing verification. The core objective is to ensure, through technical means, that the device can accurately identify, parse, and respond to commands from different protocols simultaneously, avoiding communication interruptions or data errors caused by protocol conflicts.
At the hardware level, a combination of high-performance processors and multi-channel communication interfaces is necessary. Portable charging pile testers typically integrate multiple CAN buses, RS485, and Ethernet interfaces, achieving physical layer protocol isolation through independent channel isolation technology. For example, for mainstream protocols such as GB/T 27930, CHAdeMO, and CCS, dedicated communication modules can be allocated to each protocol to avoid signal crosstalk. Simultaneously, an embedded microcontroller with real-time processing capabilities ensures parallel processing of multi-protocol data streams, preventing response delays due to insufficient computing power.
The protocol parsing engine must possess dynamic adaptation and fault tolerance capabilities. The portable charging pile tester needs a built-in configurable protocol parsing library to support rapid adaptation to new protocols or protocol version updates via software definition. For multi-protocol concurrent scenarios, the parsing engine must adopt a layered processing architecture: the bottom-layer hardware interface handles raw data acquisition, the middle layer identifies protocol types and splits data frames, and the upper application layer calls the corresponding parsing algorithm based on the protocol type. For example, when a message with CAN ID 0x18FF50E5 is detected, it is automatically identified as a BMS status message under the GB/T 27930 protocol, and preset parsing rules are used to extract key parameters such as voltage and current.
Timing control mechanisms are crucial to avoiding conflicts. Different protocols have strict timing requirements in stages such as charging handshake, parameter configuration, and fault diagnosis. The portable charging pile tester needs to achieve millisecond-level timing synchronization through a high-precision timer to ensure that each protocol process proceeds according to the standard timing sequence. For example, in the GB/T protocol, the detection of physical connection and low-voltage auxiliary power supply power-on must be completed within 5 seconds, while the PLC communication initialization of the CCS protocol must be established within 3 seconds. The portable charging pile tester needs to employ a dynamic timing adjustment algorithm to automatically compensate for time deviations based on actual communication latency, preventing handshake failures caused by timing misalignments.
Error handling and recovery mechanisms must cover the entire communication link. The portable charging pile tester must have the ability to monitor the status of each protocol channel in real time. When anomalies such as CRC check failures or timeout retransmissions are detected, an error recovery process should be triggered immediately. For example, for message loss caused by excessive CAN bus load, the portable charging pile tester can dynamically adjust the message sending frequency or enable a backup communication channel for data retransmission. Simultaneously, protocol state machine fault-tolerant logic must be designed to automatically fall back to a safe state and re-initiate the communication process when unexpected messages are received, rather than directly interrupting the connection.
The testing and verification phase requires constructing multi-protocol cross-test scenarios. By simulating the communication behavior of different brand vehicle BMSs, the compatibility of the portable charging pile tester under multi-protocol concurrency is verified. For example, simultaneously simulating charging requests from GB/T protocol vehicles and CHAdeMO protocol vehicles, the tester's ability to correctly distinguish protocol types and allocate corresponding resources can be observed. In addition, fault injection testing is required to proactively create abnormal scenarios such as bus conflicts and message tampering to verify the portable charging pile tester's anti-interference capabilities and stability.
Software upgrades and protocol library expansion capabilities are essential for long-term reliability. As charging standards iterate, the portable charging pile tester must support updates to the protocol parsing library via OTA or local upgrades. For example, for the newly released ChaoJi protocol, users only need to import the protocol definition file, and the portable charging pile tester can automatically generate parsing rules without replacing hardware. This flexibility significantly extends the device's lifespan and reduces maintenance costs.
The portable charging pile tester constructs a complete solution for multi-protocol concurrent communication through hardware isolation, dynamic parsing, precise timing control, fault tolerance mechanisms, and comprehensive testing and verification. This technical system not only improves testing efficiency but, more importantly, provides reliable assurance for the interoperability of charging piles and vehicles, contributing to the standardization and intelligent development of new energy vehicle charging infrastructure.
