| Because of its excellent performance, Lithium-ion batteries has been widely used as abackup power source in the industry. However, lithium-ion battery, on overcharge, overdischarge, overheating and extrusion conditions, will lose its service life and even lead toa security issue. The key to solving the problem is to provide a stable, reliable batterymanagement system to control the charging and discharging process of the lithium-ionbattery and avoid over-charging, over-discharging occurrence, thus increasing the servicelife of the lithium-ion battery and use of safety.At first, an overall design of a set of STM32-based lithium-ion battery monitoring andmanagement system, and the design brief for its rationality demonstration is proposedafter a full investigation and study of key technology lithium-ion battery monitoring andmanagement. Then the hardware design and software design of the system is describedin detail.As for the hardware design, this paper focuses on the analysis and description of theSTM32F107reset circuit and download circuit design, USART to RS485and RS232circuitdesign, CAN controller expansion circuit design, PHY configuration circuit design forEthernet, digital input circuit and digital output circuit design. In addition, an isolationprotection design for protecting STM32F107is also analyzed and explained.As for the software design, this paper focuses on describing the modular andhierarchical design principles of software design and analysis of the overall design of eachlayer and each module. In addition, the paper also analyzes the protocol parsingtechnology based on finite state machine model and byte stream, and the key toimplement a soft-watchdog monitoring technology based on STM32F107windowwatchdog.At last, the result of the design, a stable and reliable which have been fully validatedin practical applications, and its prospect is present. |
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