Fault diagnosis control method of battery current sensor
A sensor fault and current sensor technology, which is applied in the field of battery current sensor fault diagnosis and control, can solve the problems of safety performance restricting the development of hybrid electric vehicles, serious emission pollution, and low power utilization rate
Inactive Publication Date: 2013-10-16
芜湖奇达动力电池系统有限公司
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Problems solved by technology
[0005] Currently commonly used fuel engine vehicles have low power utilization and serious emission pollution
Today, with increasing emphasis on environmental protection, new energy vehicles have become an irreplaceable development direction, especially hybrid vehicles are gradually accepted by the public due to the advantages of low emissions, the technology is relatively simple and mature, and can be charged wherever there is electricity supply , but now the safety performance of automobile batteries seems to be the bottleneck restricting the development of hybrid electric vehicles, so the method of testing and reporting the safety performance of automobile batteries is particularly important, which is also a technical obstacle that we should overcome
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[0031] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.
[0032] The BMS (battery management system) system involved in the present invention is a part of a hybrid electric vehicle (hybrid electrical vehicle), and it can realize functions such as warning light management, system function limitation or prohibition, and the like. The invention realizes the fault detection function of the battery current sensor of the BMS system with a relatively simple method. The signal is transmitted to the HCU (central controller) through CAN, and displayed on the instrument panel through the indicator light, so that the driver can know the safety status of the battery at a glance, so that the battery current sensor can be replaced when something goes wrong.
[0033] Current sensor disconnection means that the signal acquisition line or power supply line of th...
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The invention relates to a fault diagnosis control method of a battery current sensor. The method comprises the following steps of: acquiring the current and / or voltage of the battery current sensor by a battery management system (BMS); calculating the acquired current and / or voltage by the BMS; and when a calculating result indicates that low channel current I is -37A and / or high channel current I is -412A, or the voltage is lower than 0.25V, judging that the current sensor has a fault.
Description
technical field [0001] The invention relates to a fault diagnosis and control method for a short-circuit open circuit of a battery current sensor, which realizes the state monitoring and control of the battery current sensor of a hybrid electric vehicle by an embedded system. Background technique [0002] my country's demand for imported oil has increased rapidly under the condition of sharply rising international oil prices. In 2003, 24 million vehicles in China burned 70 million tons of gasoline, accounting for 85% of the total gasoline consumption in the country. At present, automobile fuel consumption has accounted for China's 1 / 3 of the entire oil consumption; it is estimated that by 2020, China's auto production will reach about 20 million vehicles, and the number of vehicles will exceed 130 million, which will burn 60% of the total oil. [0003] New energy vehicles refer to the use of unconventional vehicle fuels as power sources (or the use of conventional vehicle fue...
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IPC IPC(8): B60L3/00G01R35/00G01R31/02
Inventor 陈信强
Owner 芜湖奇达动力电池系统有限公司