Fault detection method and device for power battery system
A power battery and system failure technology, which is applied to measuring devices, testing electrical devices in transportation, measuring electricity, etc., can solve problems such as low detection efficiency, large disassembly workload, and large blindness
Active Publication Date: 2019-02-12
CH AUTO TECH CORP CO LTD
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045] Embodiments of the present invention provide a power battery system fault detection method and device. Each will be described below.
[0046] First, a fault detection method for a power battery system is described.
[0047] Such as figure 1 As shown, the embodiment of the present invention provides a power battery system fault detection method, the power battery system is composed of a plurality of standard battery boxes connected in series, the metho...
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The embodiment of the invention provides a fault detection method and apparatus for a rechargeable energy storage system (RESS). The fault detection method comprises the steps: acquiring a first voltage detection point at a total positive electrode of an RESS and a first voltage between vehicle bodies, and / or acquiring a second voltage detection point at a total negative electrode of the RESS and a second voltage between vehicle bodies; when the absolute value of the first voltage is the first integral multiple of the nominal voltage of a standard battery box, determining a connecting point between the first integer of standard battery box and the first integer +1 of standard battery box from the first voltage detection point to the total negative electrode of the RESS as a fault point; and when the second voltage is the second integral multiple of the nominal voltage of the standard battery box, determining a connecting point between the second integer of standard battery box and the second integer +1 of standard battery box from the second voltage detection point to the total positive electrode of the RESS as a fault point. Therefore, the fault detection method and apparatus for a rechargeable energy storage system (RESS) can quickly and accurately position a short circuit fault point.
Description
technical field [0001] The invention relates to the technical field of automobile design, in particular to a fault detection method and device for a power battery system. Background technique [0002] The traditional automotive power battery system (RESS, rechargeable energy storage system) mainly uses an integrated battery box structure to provide high-voltage power for the entire vehicle. However, due to the limitation of installation space in some models, the RESS system can only provide high-voltage power supply for the whole vehicle by connecting multiple standard battery boxes in series. In this series RESS system, there is a risk of short circuit between the connection point of the standard battery boxes connected in series and the vehicle body. [0003] At present, in order to solve the above technical problems, firstly, the battery management system of the whole vehicle detects and calculates the insulation resistance between the total positive pole or the total ne...
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Login to View More IPC IPC(8): G01R31/02
CPCG01R31/006G01R31/50
Inventor 陆群赵玉风
Owner CH AUTO TECH CORP CO LTD