Vehicle device insulation resistance detection method, device, equipment and storage medium
A technology for insulation resistance and vehicle devices, which is applied in the direction of vehicle energy storage, high resistance measurement, and measurement devices, and can solve problems such as the inability to measure insulation resistance, the inability to introduce a reference resistance into a loop, and the inability to measure module insulation resistance, etc.
Pending Publication Date: 2022-06-03
IAT AUTOMOBILE TECH
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Problems solved by technology
However, using the method of voltage division to detect insulation resistance, on the one hand, the reference resistance cannot be directly introduced into the loop, and on the other hand, the insulation resistance value between the modules cannot be measured.
[0004] It should be noted that in the prior art, when a fault occurs in the battery pack, the insulation resistance of the high-voltage circuit of the vehicle to the ground cannot be measured by the voltage division method.
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[0029] In order to make the above and other features and advantages of the present application clearer, the present application is further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explaining to those skilled in the art, and are only exemplary rather than restrictive.
[0030] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. It will be apparent, however, to one of ordinary skill in the art that the specific details need not be employed to practice the present application. In other instances, well-known steps or operations have not been described in detail to avoid obscuring the application.
[0031] Based on part of the background technology, it can be seen that although the related technology uses the voltage division method to detect the fault resistance of the vehicle, the insula...
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The invention provides a vehicle device insulation resistance detection method, device and equipment and a storage medium. The method comprises the steps that a control signal generator sends a first signal to a circuit; the circuit comprises a measuring circuit, a to-be-measured insulation resistor and a signal generator, two ends of the to-be-measured insulation resistor are respectively connected with the measuring circuit and the signal generator, and the to-be-measured insulation resistor is a ground resistance of a high-voltage loop of a vehicle; the measuring circuit at least comprises a reference resistor; under the condition that a second signal in the circuit is detected, the voltage of the reference resistor is sampled and obtained; and calculating the resistance value of the to-be-measured insulation resistor according to the voltage value of the reference resistor, the preset resistance value of the reference resistor and the preset voltage of the first signal. Therefore, the resistance value of the resistor between the high-voltage loop of the vehicle and the ground can be calculated in real time in the circuit.
Description
technical field [0001] The invention relates to the field of insulation resistance detection, in particular to a method, device, equipment and storage medium for detection of insulation resistance of a vehicle device. Background technique [0002] Automobile insulation resistance detection is to detect the insulation resistance of the power battery of the electric vehicle. It is an important function to ensure the insulation safety of the electric vehicle. Its performance is directly related to the life safety of the passengers. [0003] In the prior art, when a failure occurs in the internal power supply circuit of the battery pack, each manufacturer has different ways to detect the insulation resistance of the vehicle. Usually, the voltage division method is used to detect the insulation resistance of the vehicle. However, using the voltage division method to detect insulation resistance, on the one hand, the reference resistance cannot be directly introduced into the loop...
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IPC IPC(8): G01R27/02
CPCG01R27/025Y02T10/70
Inventor 何大龙
Owner IAT AUTOMOBILE TECH