Double-way active equalization electric automobile battery monitoring system based on PIC single chip microcomputer and control method
An active equalization, electric vehicle technology, applied in electric vehicle charging technology, electric vehicles, battery/fuel cell control devices, etc., can solve the problems of low equalization accuracy, low reliability, high design cost, and achieve fast response speed, Improve reliability and solve the effect of high design cost
Active Publication Date: 2019-01-29
SICHUAN VOCATIONAL COLLEGE OF CHEM TECH
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Problems solved by technology
[0007] The purpose of the present invention is to provide a two-way active balancing electric vehicle battery monitoring system and control method based on a PIC microcontroller, which solves the problems of high design cost, low reliability and low balancing accuracy of the existing battery balancing system
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[0043] Such as figure 1 As shown, the bidirectional active balancing electric vehicle battery monitoring system based on PIC microcontroller disclosed by the present invention includes:
[0044] The lithium battery monitoring module is used to monitor the voltage of the single lithium battery in the battery pack in real time, communicate with the equalization module through the GPIO port in real time, and transmit the output signal to the control module through the isolated communication module;
[0045] The isolated communication module is used to isolate strong and weak electricity, and communicates with the lithium battery monitoring module through an isolation transformer and twisted pair to make the whole system work in a low-voltage state;
[0046] The control module adopts PIC18LF27K40 chip to realize system control. The current detection module detects the voltage signal of the battery pack through the sampling resistor, and transmits the voltage signal to the control ...
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The invention discloses a double-way active equalization electric automobile battery monitoring system based on a PIC single chip microcomputer and a control method. The double-way active equalizationelectric automobile battery monitoring system based on the PIC single chip microcomputer comprises a lithium battery monitoring module, an equalization module, a control module and an isolated communication module, wherein the lithium battery monitoring module is used for monitoring the voltage of a single lithium battery in a battery pack; the equalization module is used for realizing double-wayactive equalization operation between the battery packs; the control module is used for controlling the system by using a PIC18LF27K40 chip; and the isolated communication module is used for realizing SPI communication between the control module and the lithium battery monitoring module. According to the double-way active equalization electric automobile battery monitoring system based on the PICsingle chip microcomputer, by using a special charge balancer LTC3300-1, double-way active equalization between the battery pack and the individual battery is realized, the voltage equalization timeis shortened, the charge transferring efficiency is enhanced, the integration degree and accuracy of the system are improved, and the cost is reduced; and as a current detection module is arranged, the current of the battery during charging and discharging is detected, the normal working of the system is guaranteed, and the reliability of the system is improved.
Description
technical field [0001] The invention relates to an electric vehicle battery monitoring system, in particular to a PIC single-chip microcomputer-based two-way active balancing electric vehicle battery monitoring system and a control method. Background technique [0002] With the global auto industry facing the huge challenges of financial crisis and energy and environmental issues, people put forward the concept of new energy vehicles. The development of pure electric vehicles, the realization of the electrification of automobile energy and power systems, and the promotion of the strategic transformation of the automobile industry have formed an international consensus. One of the core technologies of electric vehicles is battery technology. Batteries are the power source of electric vehicles and the main factor restricting the development of electric vehicles. Therefore, the management of electric vehicle batteries is very important. Electric vehicle battery management sy...
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IPC IPC(8): B60L58/22
CPCY02T10/70Y02T90/16
Inventor 杨平张健温培和桂连彬陈昌涛
Owner SICHUAN VOCATIONAL COLLEGE OF CHEM TECH