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Research and Design of Lithium Battery Automatic Test System

by:dcfpower     2021-03-17
u003cpu003eu003cpu003eAbstract: Aiming at the problem of low efficiency of existing lithium battery production and testing, an automated test system with a microprocessor S3C2410 as the core and serial bus control measuring instruments to achieve lithium battery production was designed. Practice has proved the design It satisfies the testing requirements for the electrical mass production of lithium batteries and provides quality assurance for the manufacture of lithium batteries. u003c/pu003eu003cpu003eKeywords: lithium battery; production test; microprocessor; automationu003c/pu003eu003cpu003eu003c/pu003eu003cpu003eIntroductionu003c/pu003eu003cpu003eWith green energy and low carbon With the development of economy, customers have higher and higher quality requirements for lithium battery manufacturing. Performance testing is a necessary condition for product quality, and real-time monitoring and information feedback of the testing process are the guarantee for the credibility of performance testing. At present, the electrical performance test of lithium-ion batteries generally uses standardized measuring instruments and meters to manually test, and there is no automatic production test and intelligent test information management suitable for large-scale industrial production. This test has low efficiency and high cost. Unable to effectively monitor in real time. Utilize the existing test instrument and the embedded system to realize the real-time collection and analysis of test data, real-time monitoring of product quality and a good man-machine interface. In view of the cost of large-scale production and other factors, we have developed a lithium battery test equipment with reliable performance and reasonable price, which can realize unmanned operation and feedback test information in real time. This equipment uses a single-chip microcomputer control test instrument to collect battery electrical performance parameters , To achieve automated testing of battery electrical performance. u003c/pu003eu003cpu003e1 Test function analysisu003c/pu003eu003cpu003ePractical verification shows that the main performance indicators such as the capacity, life and safety of the lithium battery can be expressed from the internal resistance of the lithium battery. The smaller the internal resistance of the lithium battery, the greater the capacity. Large, the change of internal resistance value can predict battery life and safety performance, so the internal resistance of lithium battery pack is an important technical indicator to measure battery performance. performance testing mainly focuses on internal resistance testing and voltage testing. The test system mainly realizes the measurement of the internal resistance and voltage of the lithium battery, data analysis, and real-time display and transmission of test information through the single-chip control test instrument. u003c/pu003eu003cpu003e2 Hardware systemu003c/pu003eu003cpu003eThe system uses the S3C2410 chip as the core processor, which is a cost-effective 32-bit microcontroller from Samsung, which contains a 32-bit ARM920T core. The main frequency is up to 203 MHZ, built-in 16KB program memory and data memory, three-channel UART, four-channel DMA, etc. The extended 64M FLASH is used to store the WINDOWS CE embedded operating system and application codes. Extend a 10M Ethernet port through the Ethernet controller CS8900A to connect the system to the INTERNAT network to realize remote monitoring. The system also designs a keyboard and LCD display to realize a man-machine interface. The block diagram of the lithium battery performance test system is shown in Figure 1 on the following page. The S3C2410 controls the Agilent 34401 multimeter through the serial bus to measure internal resistance and voltage. After the single-chip computer reads the data, it analyzes, processes and displays the data according to the set test range, and transmits it to the upper computer in real time to realize remote monitoring. The single-chip computer also automatically controls the relay according to the program to realize the operation of the actuator, and cooperates with the instrument to complete the automated test. The system can also be manually set to control the test system through buttons. u003c/pu003eu003cpu003eu003c/pu003eu003cpu003e3 System software designu003c/pu003eu003cpu003eu003c/pu003eu003cpu003eTo view the original text, please click on CNKI to readu003c/pu003eu003cpu003eu003c/pu003e u003c/pu003eu003c/pu003e
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