A current detection shunt for new energy vehicle battery management system

Abstract

The invention discloses a current detection shunt used in a new energy vehicle battery management system, which includes a heat dissipation unit and a working module. By setting a high temperature switching unit, the temperature data is compared and analyzed. When the temperature data exceeds the temperature limit data, the time reaches When setting the value, switch the shunt resistance to protect the current shunt circuit from being burned by continuous high temperature, and solve the problem of damage to the current shunt due to excessive heat concentration or local continuous heating; by setting the statistical analysis unit and life self-test The unit calculates the current fluctuation coefficient and judges whether it is necessary to independently check the life of the shunt, and feeds back the inspection results to the display interface of the electric vehicle, so that the user can know the reliability of the shunt in time and avoid problems caused by the shunt itself. The electric vehicle cannot detect the magnitude of the current during use, which improves safety and facilitates users to replace the shunt in time.

Description

technical field [0001] The invention relates to the field of current detection, in particular to a current detection shunt used in a battery management system of a new energy vehicle. Background technique [0002] The battery management system is a bridge connecting the core component battery of new energy vehicles and the whole vehicle. Benefiting from the development of new energy vehicles, the battery management system as a core component has also developed rapidly. Among them, the total current detection is essential. The current detection of the battery management system is divided into the traditional Hall sensor detection method and the shunt detection method. Among them, the shunt detection method, due to its high measurement accuracy and relatively low cost, In addition, the measuring method is simple, less equipment is used, and it is convenient and quick to be applied to the battery management system. [0003] The measurement principle of the current detection s...

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Problems solved by technology

[0009] (2) How to calculate the current fluctuation coefficient and judge whether it is necessary to independently check the life of the shunt by setting the statistical analysis unit and the life self-checking unit, and feed back the check results to the display interface of the electric vehicle to solve the problems of users in the prior art The use reliability of the shunt cannot be understood in time, resulting in the inability to guarantee the detection of the current size during the use of the electric vehicle and the problem of potential safety hazards

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