Battery management system relay adhesion diagnosis method

A technology of battery management system and diagnosis method, which is applied in the field of battery management system in the new energy automobile industry, can solve the problems of high voltage safety risk, high cost of wiring harness, high cost of controller, etc., and achieve low voltage safety risk, multiple functions and low cost Effect

Active Publication Date: 2017-03-15
TIANJIN ENERGIES
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Problems solved by technology

[0003] With the development of electric vehicles getting faster and faster, the battery safety requirements are becoming more and more stringent. During this period, the diagnosis of the relay state is particularly important. The main disadvantages of the existing relay diagnosis methods are: (1) the high cost of the controller (2 ) High cost of wiring harness (3) Additional relay control strategy is added for relay detection (4) High voltage safety risk

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  • Battery management system relay adhesion diagnosis method
  • Battery management system relay adhesion diagnosis method
  • Battery management system relay adhesion diagnosis method

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Embodiment Construction

[0030] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "horizontal", "top", "bottom", "front", "rear", "left", "right", The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention The description is created and simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, ...

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Abstract

The invention provides a battery management system relay adhesion diagnosis method. The method comprises the following steps: setting first voltage sampling points at the cathode of a batter pack and the front end of a main negative relay, and setting second voltage sampling points at the anode of the battery pack and the rear end of a main positive relay; and according to states of relay switches, acquiring voltage values between the first voltage sampling points and the second voltage sampling points, and determining an adhesion state of each relay. According to the invention, relay adhesion is diagnosed through change of voltages along with time, the cost is low, no additional control strategies are added, the high-voltage risk is reduced, while the relay states are reported, main loop states are also reported, and such states as overload of loads, short circuits, open circuits and the like can be determined.

Description

technical field [0001] The invention and creation belong to the technical field of battery management systems in the new energy vehicle industry, in particular to a method for diagnosing adhesion of a battery management system relay. Background technique [0002] With the increasing consumption of non-renewable resources, especially the consumption of petroleum resources, and the increasingly stringent vehicle exhaust emission standards in countries and regions around the world, people have to start thinking about the sustainable development of the automobile industry and the pollution problems it brings. New energy vehicles will become the mainstream of automobile development in the first few decades of the new century, and become the consensus of all industry insiders in the automotive industry. The Chinese government is also implementing many high-tech development research programs. Under the joint promotion of major automobile manufacturing companies, a series of scient...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3278
Inventor 张彩庆郑磊王成龙王驰伟
Owner TIANJIN ENERGIES
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