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Method and system for detecting contactor adhesion

A contactor and heating contactor technology, applied in instruments, measuring devices, measuring electrical variables, etc., can solve the problem that the main negative contactor and the pre-charged contactor cannot be determined to stick, and achieve the effect of efficient and convenient sticking fault troubleshooting.

Inactive Publication Date: 2021-01-22
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for detecting contactor sticking, aiming to solve the technical problem that it is impossible to determine which one is sticking when one of the main negative contactor and the pre-charge contactor is sticking

Method used

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  • Method and system for detecting contactor adhesion
  • Method and system for detecting contactor adhesion
  • Method and system for detecting contactor adhesion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] An embodiment of the present invention provides a method for detecting contactor adhesion, the method comprising:

[0057] It is determined that there is contactor adhesion in one of the first contactor branch and the second contactor branch, wherein the first contactor branch is connected in series with the power battery and the load branch in the working state to form a power supply circuit The second contactor branch of the power supply circuit is connected in parallel with the first contactor branch, and the resistance of the second contactor branch is different from the resistance of the first contactor branch;

[0058] Drive the load branch into a load working state, and then obtain the circuit parameter change of the first contactor branch or the second contactor branch, and determine the first contactor branch through the circuit parameter change there is contactor sticking or there is contactor sticking in said second contactor branch;

[0059] The first conta...

Embodiment 2

[0077] An embodiment of the present invention provides a system for detecting contactor adhesion, the system includes:

[0078] The battery management system is configured to determine that there is contactor adhesion in one of the first contactor branch and the second contactor branch, wherein the first contactor branch is connected to the power battery and the load in the working state The branches are connected in series to form a power supply circuit, and the second contactor branch is connected in parallel with the first contactor branch relative to the power supply circuit, and the resistance of the second contactor branch is the same as that of the first contactor branch The resistance of the circuit is different;

[0079]The battery management system is further configured to drive the load branch into a load working state, and then obtain the change of the circuit parameter of the first contactor branch or the second contactor branch, through the circuit The parameter...

Embodiment 1 and Embodiment 2

[0082] Based on Embodiment 1 and Embodiment 2, the embodiment of the present invention provides a circuit with a function of detecting contactor adhesion, the circuit includes:

[0083] Power battery and load branch;

[0084] The first contactor branch is used to form a power supply circuit in series with the power battery and the load branch in the working state;

[0085] a second contactor branch for parallel connection with the first contactor branch in the power supply circuit;

[0086] A battery management system, configured to detect circuit parameters of the first contactor branch or the second contactor branch, and to determine that one of the first contactor branch and the second contactor branch is in contact device adhesion, selectively driving the load branch to enter the load working state;

[0087] Wherein, the resistance of the second contactor branch is different from the resistance of the first contactor branch;

[0088] Such as figure 1 , the power batter...

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Abstract

The invention provides a method and system for detecting contactor adhesion, which belong to the technical field of vehicle batteries. The method comprises the steps that what is determined is that contactor adhesion exists in one of a first contactor branch and a second contactor branch, wherein the first contactor branch is connected with a power battery and a load branch in series to form a power supply loop in the working state, and the second contactor branch is connected with the first contactor branch in parallel relative to the power supply loop, and the resistance of the second contactor branch is different from that of the first contactor branch; and the load branch is driven to enter a load working state, then circuit parameter changes of the first contactor branch or the secondcontactor branch are obtained, and contactor adhesion is determined to exist in the first contactor branch or contactor adhesion is determined to exist in the second contactor branch through the circuit parameter changes. The method is used for quickly, efficiently and conveniently determining the adhesion working condition of the contactor.

Description

technical field [0001] The invention relates to the technical field of vehicle batteries, in particular to a method for detecting contactor adhesion, a system for detecting contactor adhesion, a circuit with the function of detecting contactor adhesion, and a contactor adhesion detection system. Sticky-enabled devices. Background technique [0002] The on-off of the high-voltage main circuit output of the electric vehicle power battery (such as a high-voltage battery pack) is controlled by the main positive contactor, the main negative contactor and the pre-charging contactor. Among them, the main negative contactor controls the on-off of the negative output of the high-voltage battery pack, the main positive contactor controls the on-off of the positive output of the high-voltage battery pack, and the pre-charging contactor controls the main contactor to reduce the closing moment before closing through the pre-charging resistor. The impact of the current on the contacts of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/68G01R19/165
CPCG01R19/16576
Inventor 刘擎宇颜广博
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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