Vehicle battery management system main relay adhesion detection circuit and detection method thereof

A main relay, vehicle battery technology, applied in circuit breaker testing, instruments, measuring electricity, etc., can solve the problems of safety, violation, hidden danger, etc., to avoid continuous discharge, avoid unsafe factors, and simplify the design.

Active Publication Date: 2017-01-18
SHENZHEN KELIE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current battery management system is not perfect for the detection of the adhesion state of the main relay of the high-voltage circuit of the power battery. The detection function depends on the repeated closing and opening of the main relay, which violates the specific process requirements of electric vehicles for safe power-on of high voltage

Method used

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  • Vehicle battery management system main relay adhesion detection circuit and detection method thereof
  • Vehicle battery management system main relay adhesion detection circuit and detection method thereof
  • Vehicle battery management system main relay adhesion detection circuit and detection method thereof

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Embodiment Construction

[0047] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0048] refer to Figure 1 to Figure 6 , in one embodiment, a main relay adhesion detection circuit of a vehicle battery management system, including a positive bus BUS+, a negative bus BUS-, and a power battery connected between the positive bus BUS+ and the negative bus BUS-, on the positive bus BUS+ There is an overall positive main relay S1, and an overall negative main relay S5 is set on the negative bus BUS-, which also includes a first switch K1, a second switch K2, a third switch K3, a first resistor R1, a second resistor R2, a seventh Resistor R7 and eighth resistor R8, one end of the first switch K1 is connected to the positive bus BUS+, the first resistor R1 and the second resistor R2 are connected in series to form a voltage divider network,...

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Abstract

A vehicle battery management system main relay adhesion detection circuit and a vehicle battery management system main relay adhesion detection method are disclosed. The circuit comprises first to third switches, and first, second, seventh and eighth resistors. One end of the first switch is connected with a positive bus. The first and second resistors are connected in series into a voltage dividing network. The first resistor is connected with the other end of the first switch. One end of the seventh resistor is connected with the non-battery side of a general positive main relay, and the other end of the seventh resistor is connected in series with the eighth resistor to form a voltage dividing network. The second resistor and the eighth resistor are connected with a sampling reference ground. One end of the second switch is connected with a negative bus, and the other end of the second switch is connected with the sampling reference ground. One end of the third switch is connected with the non-battery side of a general negative main relay, and the other end of the third switch is connected with the sampling reference ground. Safe, simple and reliable main relay adhesion detection is realized.

Description

technical field [0001] The invention relates to a main relay adhesion detection circuit of a vehicle-mounted battery management system and a detection method thereof. Background technique [0002] With the rapid development of the electric vehicle industry, the importance of the high-voltage part of electric vehicles has attracted more and more attention. The power battery pack is the power source of the whole vehicle. Whether the working status of the main relay in the high-voltage charge-discharge circuit is normal or not directly affects the safety of the whole vehicle. Under normal working conditions, high-voltage power supply or battery charging is carried out to ensure that the power battery avoids misoperation when the main relay fails, and eliminates unsafe factors in the process of high-voltage charging and discharging. The current battery management system is not perfect for the detection of the adhesion state of the main relay of the high-voltage circuit of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3278G01R31/327
Inventor 吕宝良张志国胡运平张泱渊
Owner SHENZHEN KELIE TECH
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