Automobile static current detecting device and method

Abstract

The invention provides an automobile static current detecting device. The device includes a data collecting unit, a display unit, a current detecting clamp and an MCU, wherein a first input terminal of the data collecting unit is connected with a positive electrode wiring terminal of the current detecting clamp; a second input terminal of the data collecting unit is connected with a negative wiring terminal of the current detecting clamp; the output terminal of the data collecting unit is connected with the input terminal of the MCU; the output terminal of the MCU is connected with the input terminal of the display unit; the current detecting clamp is used for detecting static current in a wire harness; the MCU collects static current through the data collecting unit and performs fitting of a current curve of the static current from a collection starting time point to an ending time point; the MCU outputs the current curve and calculates the average discharge current, accumulated discharge capacity and accumulated discharge time. According to the invention, fault detection efficiency of automobile electric parts can be improved and automobile use safety can be improved.

Description

technical field [0001] The invention relates to the field of current detection, in particular to an automobile static current detection device and method. Background technique [0002] Due to the increase of electronic configurations in modern automobiles, many controls need to be connected to the constant power of the battery. When the controller is connected to the constant power, it will usually generate a static current. That is, when the vehicle is locked, the controller will still have a small current loss. If There are many controllers, or when a controller fails intermittently, it will cause excessive discharge current of the vehicle and cause the battery to lose power. After the production and commissioning of the car, it is necessary to detect the static discharge current of the whole vehicle to prevent the static current of the whole vehicle from being too large when some electronic components are not assembled or there is a fault, which will cause the battery to ...

AI Technical Summary

Problems solved by technology

[0002] Due to the increase of electronic configurations in modern automobiles, many controls need to be connected to the constant power of the battery. When the controller is connected to the constant power, it will usually generate a static current. That is, when the vehicle is locked, the controller will still have a small current loss. If There are many controllers, or when a controller fails intermittently, it will cause the vehicle to discharge too much current and cause the battery to lose power

After the production and commissioning of the car, it is necessary to detect the static discharge current of the whole vehicle to prevent the static current of the whole vehicle from being too large when some electronic components are not assembled or there is a fault, which will cause the battery to lose power and fail to start the engine. Wait

The quiescent current of the vehicle is related to the electrical configuration and design requirements of the vehicle. If the detected quiescent current output tends to be stable and is not much different from the design value, it is judged that the static discharge of the vehicle is qualified, but due to the control The sleep time of the device is long, which affects the efficiency of the operation. There are also some sensors and switches input to the controller that generate intermittent high-current signals when the assembly is loose, which will cause a large instantaneous static current. If it is not handled in time, there may be a whole Car failure, reducing the safety of car use

[0003] In the prior art, the detection method for the quiescent current discharge of the whole vehicle is usually to use a multi-function multimeter connected in series to the battery connection line for detection and confirmation. This method makes the detection process inefficient and cannot accumulate the quiescent current consumption within a period of time. capacity, let alone display the quiescent current curve

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