Detection circuit, detection system and detection method

Abstract

The invention discloses a detection circuit, a detection system and a detection method, the circuit comprises a management system, a first bias circuit and a second bias circuit, one end of the first bias circuit is connected with one end of an element to be detected; one end of the second bias circuit is connected with the other end of the to-be-tested element and is grounded, and the other ends of the first bias circuit and the second bias circuit receive externally input bias voltage; the first biasing circuit comprises a first resistance voltage division circuit, and the second biasing circuit comprises a second resistance voltage division circuit; and the management system is used for collecting the first voltage in the first resistance voltage division circuit, the second voltage in the second resistance voltage division circuit and the current flowing through the element to be detected, and judging the state of the element to be detected. By implementing the invention, the voltage of the element to be detected can be tested, and the resistance is calculated in combination with the current, so that the state of the element to be detected can be judged according to the resistance. Therefore, the detection circuit can be applied to an electric vehicle battery system to realize connectivity diagnosis of a copper bar.

Description

technical field [0001] The invention relates to the technical field of electric vehicle batteries, in particular to a detection circuit, a detection system and a detection method. Background technique [0002] With the development of society, automobiles are playing an increasingly important role in people's lives and work. The automobile industry has become an important pillar industry of the national economy. However, automobiles bring convenience and comfort to people, but also bring many Negative effects, such as energy crisis, environmental pollution, etc. With the development of human civilization, in order to alleviate the dual pressure on resources and the environment, countries have introduced a series of policies to support the development of new energy vehicles. Designs combining hybrid electric vehicles, pure electric vehicles, 48V systems and traditional fuel vehicles have been realized one after another. [0003] In the design of pure electric vehicle battery...

AI Technical Summary

Problems solved by technology

, to solve the technical problem in the prior art that the detection of the copper bars in the battery system cannot judge the abnormal looseness of the copper bars

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