Lithium battery discharge safety monitoring system

Abstract

The invention belongs to the technical field of lithium battery discharge monitoring, and particularly relates to a lithium battery discharge safety monitoring system. The system comprises a lithium battery pack formed by connecting a plurality of battery units in series or in parallel, a battery pack voltage, current and internal resistance detection module, a unit voltage, current and internal resistance detection module, a multi-channel data acquisition module, a data processing and control module, a storage module, a display module, an alarm module and a communication module. The battery pack voltage, current and internal resistance detection module is composed of a battery pack voltage sampling module, a battery pack current sampling module and a battery pack internal resistance sampling module. The total open-circuit voltage, current and internal resistance of the lithium battery pack and the open-circuit voltage, current and internal resistance of each battery unit can be monitored in real time, and the requirements of monitoring the temperatures of the two poles of the battery units and monitoring the working environment temperature of the lithium battery pack are met, so that the defect of single function in the prior art is overcome; and the comprehensive safety monitoring on the discharge of the lithium battery pack is realized.

Description

technical field [0001] The invention relates to the technical field of lithium battery discharge monitoring, in particular to a lithium battery discharge safety monitoring system. Background technique [0002] In recent years, with the development of various hybrid vehicles and electric vehicles, the performance requirements for on-board batteries are getting higher and higher. This is especially true for plug-in hybrid electric vehicles (PHEV) and electric vehicles (EV). Compared with gasoline-type hybrid electric vehicles, the requirements for battery capacity are higher, while the requirements for charging and discharging losses and self-discharge are as small as possible. Therefore, the status of lithium-ion batteries is becoming more and more important. [0003] Lithium-ion batteries have become the preferred power source for electric vehicles due to their high energy density, high power density, long cycle life, and good safety. In order to achieve a certain voltage,...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a lithium battery discharge safety monitoring system, which solves the problem that the existing lithium battery packs used in electric vehicles cannot or can only monitor the lithium battery packs in a single way. Real-time monitoring of open-circuit voltage, current and internal resistance, as well as real-time monitoring of open-circuit voltage, current and internal resistance of each battery unit, cannot detect the temperature of the two poles of the battery unit and the temperature of the working environment of the lithium battery pack, and the function is relatively single , the problem that the safety monitoring of lithium battery discharge cannot be realized

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