With the popularization of charging piles, more and more pile enterprises pay attention to the hard quality of charging piles. As an important standard for charging pile testing specifications in the industry, what are the requirements for the detection of factory charging piles by the 1591 charging machine testing specification?
In order to ensure the long-term reliable and stable use of the charging pile after installation, each charging pile needs to use the special test equipment to carry out strict factory test according to the standard specifications before leaving the factory. The QGDW1591-2014 electric vehicle non-vehicle charger inspection technical specification is for the factory test. The list of all test items and test methods are listed. The author analyzes the safety, compatibility and stability of the factory requirements based on the perspective of the pile enterprise, in order to bring some help to the industry practitioners.
First, the safety test
Self-contained and user-safe is the primary guarantee for any product. The current output level of the charging post is up to 750V and the current is 250A. A series of safety protection measures must be tested at the factory. The safety requirements test items listed in 1591 are:
Figure 1 National Network 1591 standard safety requirements test
As for the above test items, the test is basically carried out using a three-phase adjustable power supply and a load. The specific experimental method has been listed in 1591, and the reader can refer to it. However, the choice of specific experimental equipment and the complexity and credibility of the test need to be emphasized: the adjustable power supply and load adjustment flexibility has a great impact on the overall test efficiency, through the selection of program-controlled power supply and program-controlled electronic load, and PC software. Automated testing can be done by making adjustments.
Second, compatibility testing
The number of charging pile enterprises and electric vehicle enterprises is booming. It is a big problem to ensure the compatibility of all charging piles and automobiles. Although the new national standard of charging piles has regulations on charging hardware interfaces and communication, it is currently The current situation is that there is no guarantee that all piles will be fully compatible with the car. The following is a picture taken by the highway charging station.
Figure 2 National grid charging pile applicable vehicle signage
The compatibility of the hardware interface is well solved, but different from the charging of the mobile phone is the communication between the pile and the vehicle during the whole charging process, real-time detection and control. For the factory test, it is impossible to test a large number of different car manufacturers in the pile connection market, then the simulation of communication test becomes inevitable; the communication test includes protocol specification test, application layer test, link layer test, physical layer test; To ensure good compatibility, special hardware simulation equipment must be used with special software to achieve testing;
Figure 3 State Grid 1591 Standard Compatibility Test Test Project
Third, the stability test
Stability is a symbol of the long-lasting vitality of a product. If you want to stabilize the entire charging pile, for the test of its charging output, the 1591 has the following test items for the charging pile output:
Figure 4 National Network 1591 charging output test project
There are several to dozens of test points under each project. There are many test points in the whole output. The power analyzer is used for manual testing. The ripple, electrical parameters and compatibility in the 1591 standard of the national network are completely tested. Sex test class, the average time in the industry is 2~3 hours. It is recommended to use customized automatic test software for automatic control test to improve accuracy and efficiency.
At any time, the shipments of major pile enterprises are increasing day by day. The efficiency of factory inspection needs to be improved. The traditional method of using point-by-point testing of a single instrument has completely failed to meet the fast delivery, and the quality assurance and efficiency requirements of the product are dazed. It has become the only way for the pile enterprises to improve the automatic factory test. The charging pile enterprises can greatly improve the test efficiency by setting up the whole pile factory inspection system, and ensure the standardization of the testing of various indicators of the products.
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