A method, device and electric vehicle of a monitoring fuse
A technology for fuses and vehicles, which is applied to electric vehicles, electrical devices, vehicle components, etc., can solve the problems of high cost and low precision, and achieve the effects of low cost, reliable accuracy, and elimination of calculation errors
Active Publication Date: 2022-06-07
BEIJING ELECTRIC VEHICLE
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[0004] Embodiments of the present invention provide a method and device for monitoring a fuse, and an electric vehicle, which are used to solve the problems of high cost and low accuracy of the method for detecting the aging state of a fuse in the prior art
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[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0034] Aiming at the problems of high cost and low precision of the method for detecting the aging state of the fuse in the prior art, the present invention provides a method, a device and an electric vehicle for monitoring the fuse.
[0035] like figure 1 As shown, the method for monitoring a fuse according to an embodiment of the present invention includes:
[0036] Step 100: Acquire a first temperature signal collected by a first temperature sensor on the copper bar and a second temperature signal collected by a second temperature sensor on the fuse within a preset time, wherein the copper bar and the fuse are connected in series with the vehicle in the power battery circuit.
[0037] In the embodiment of the present invention, the copper ...
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The invention provides a method and device for monitoring a fuse and an electric vehicle, and relates to the field of fuse monitoring. The method for monitoring a fuse includes: obtaining a first temperature signal collected by a first temperature sensor on the copper bar and a second temperature signal collected by a second temperature sensor on the fuse within a preset time period, wherein the copper bar and the second temperature signal are collected by the fuse The fuse is connected in series in the power battery circuit of the vehicle; according to the first temperature signal and the second temperature signal, the difference between the temperature of the fuse and the copper bar is calculated; according to the difference between the difference and the first threshold Size relationship, determine the aging state of the fuse. In the embodiment of the present invention, the method of monitoring the indirect parameter of temperature and data analysis and calculation is adopted to monitor the life state of the fuse and give an early warning before its failure, thereby reducing the probability of abnormal melting of the fuse and reducing the cost of the vehicle. The probability of breakdown occurs, and the fuse monitoring method is low in cost and reliable in accuracy.
Description
technical field [0001] The invention relates to a power battery system, in particular to a method and device for monitoring a fuse and an electric vehicle. Background technique [0002] The fuse is an important active safety component for power batteries and new energy vehicles. The fuse is subjected to current and short-circuit impact during operation, resulting in accumulated fatigue damage; however, the fuse melts abnormally without a short circuit, which will cause the vehicle to break down and cause danger. . [0003] The resistance value of the fuse can reflect the aging state of the product, but its resistance value is very small, at the level of 0.1mΩ. The existing technology uses a high-precision acquisition circuit to collect the fuse voltage and calculate its resistance, which is difficult to ensure accuracy and expensive. SUMMARY OF THE INVENTION [0004] Embodiments of the present invention provide a method, a device and an electric vehicle for monitoring a f...
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IPC IPC(8): B60L3/00B60L3/04
CPCB60L3/0046B60L3/04
Inventor 李焕明
Owner BEIJING ELECTRIC VEHICLE