Distributed power battery pack monitoring device

Abstract

The present invention discloses a distributed power battery pack monitoring device, comprising a charger or load interface, a DC power supply interface, a first inductor L1, a second inductor L2, a plurality of slave machines, a battery pack, a host, a DC power supply line DC+, and a DC power supply line DC-; wherein each slave machine comprises a third inductor L3, a fourth inductor L4, a first capacitor C1, a second capacitor C2, a slave machine power supply module, a slave machine microcontroller MCU, a terminal voltage acquisition module, a temperature acquisition module, an internal resistance measuring module, and a slave machine DC carrier module; the host comprises a fifth inductor L5, a sixth inductor L6, a third capacitor C3, a fourth capacitor C4, a host power supply module, a host microcontroller MCU, a total voltage acquisition module, a current acquisition module, a display module, and a host DC carrier module. The distributed power battery pack monitoring device of the present invention achieves information interaction between the host and the slave machines through carriers on the DC power supply lines, thereby saving the limited inner space of an automobile, and saving time and cost of periodic maintenance of the automobile.

Description

technical field [0001] The invention relates to the field of power battery management, in particular to a distributed battery pack monitoring device based on DC carrier technology. Background technique [0002] The 21st century has entered an important era of new energy development. With the rapid development of science and technology, the development of new energy has gradually occupied the mainstream position of energy development. Especially in the case of increasingly fierce international energy competition and national defense, new energy The role of the automobile industry is very important, especially the rapid development of the automobile industry today, and the use of traditional oil as power has brought about major problems such as oil energy shortages and environmental pollution. In recent years, the automobile industry has flourished, and the monitoring of power battery packs is particularly important; [0003] The research on the power and other performance of ...

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Problems solved by technology

[0003] The research on the power and other performance of a single battery is far from meeting the requirements of electric vehicles. In actual use, the application method of group integration of single batteries must be adopted. From the perspective of current domestic and foreign power battery pack monitoring technologies, there are mainly the following two types of communication Form: (1) All-in-one host form: All signal communication lines that collect battery voltage, temperature, internal resistance, etc. need to be connected to the host, which will lead to scattered wiring in the car. In addition, the vibration of the car during driving is very It is easy to loosen the connection of the signal communication line, and the signal cannot be transmitted completely, which will cause the online monitoring failure of the power battery pack. Secondly, this method is not convenient for regular maintenance and repair; (2) One master and multiple slave communication forms: each single battery is fixed Install a slave, and each slave collects the terminal voltage, temperature and internal resistance of the single battery, and then sends it to the host through RS485 or CAN bus. This method also requires at least two power lines and two communication lines. Compared with the first form, the practical value has been improved. For the limited interior space of the car, the fewer cables required are more stable. Therefore, it is urgent to develop and design a power battery pack monitoring system with fewer cables. device

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