A Multi-machine Synchronization Method of BMS Simulation System

Abstract

The present invention provides a multi-machine synchronization method of a BMS simulation system, wherein a gateway is arbitrarily designated as a main gateway from each of the gateways, and the host computer is used to synchronize the clock of the main gateway; the clock is completed at the main gateway. After synchronization, clock synchronization is carried out to other gateways through the main gateway; when the gateway sends the upper computer data packet to the simulation test module, the simulation is realized by adding a timestamp in the upper computer data packet. The test modules perform clock synchronization. The invention has the advantages of improving the accuracy of time synchronization between multiple gateways, improving synchronization efficiency and reducing resource consumption.

Description

Technical field [0001] The present invention relates to the field of lithium battery pack, and more particularly to a multi-machine synchronization method for a BMS simulation system. Background technique [0002] In the current lithium battery sector, the battery simulation system makes it easy to build multiple simulation detection systems by adopting fast and convenient modular assembly, and multiple simulation detection systems can also be used synchronously, thereby improving test efficiency. [0003] The simulation detection system requires multiple modules to cooperate. During the test cycle, multiple modules of the simulation detection system need to synchronize concurrency operations, perform uninterrupted data sampling of the measured object, the sampling cycle requires MS level, even US-level, which is a fast response performance of the simulation detection system is one Tests, any module, even if it is a super or lag, a sampling cycle may bring a large deviation to th...

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Problems solved by technology

If the USB communication bus is used, although there are inherent advantages in transmission bandwidth and equipment cascading, the USB cable should not be too long, which is not suitable for strong electromagnetic interference environments; if the PXI communication bus is used, not only the development difficulty is high, but the board size Large, high development cost, and it is not easy to realize an unlimited number of equipment cascading, and the flexibility is not high; if all Ethernet communication is used, the utilization rate of network resources is low and the cost is high

[0005] Due to the influence of various factors, the existing simulation detection system has the following deficiencies: 1. The clock synchronization efficiency is low, and the module resource consumption is large; 2. There is no redundancy measure. Once the main gateway fails, the system will Synchronization failure; 3. The gateway synchronization relies too much on the PC, without any self-synchronization strategy; 4. The data throughput performance is weak

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