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Vehicle power battery fault diagnosis method and device based on battery terminal voltage estimation

A technology for battery failure and vehicle power, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problem of high cost and achieve the effect of accurate cost

Active Publication Date: 2019-05-24
SAIC GENERAL MOTORS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned existing technical solutions have the following problems: since two or more sensors need to be used for the same group of signals, the cost is relatively high

Method used

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  • Vehicle power battery fault diagnosis method and device based on battery terminal voltage estimation
  • Vehicle power battery fault diagnosis method and device based on battery terminal voltage estimation

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Embodiment Construction

[0025] figure 1 is a schematic structural diagram of a vehicle power battery fault diagnosis device according to an embodiment of the present invention. Such as figure 1 As shown, the vehicle power battery fault diagnosis device disclosed in the present invention includes a parameter estimator 1 , a fault evaluator 2 and a fault processing unit 3 . The parameter estimator 1 receives the signal collected by the sensor and is associated with the current working parameter of the target power battery, and calculates the estimated value of the current working parameter of the target power battery based on the signal. The fault evaluator 2 evaluates the current working state of the target power battery based on the estimated value and the actual value of the current working parameter of the target power battery collected by other sensors, and when determining that the target power battery When an abnormality occurs in the current working state of the device, a fault processing ins...

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Abstract

The invention provides a cell-terminal-voltage-estimation-based fault diagnosis method and equipment for a vehicle power battery. The method comprises: a signal associated with a current working parameter of a target power battery is collected by a sensor and an estimation value of the current working parameter of the target power battery is calculated based on the signal; according to the estimation value and a practical value, collected by another sensor, of the current working parameter of the target power battery, a current working state of the target power battery is estimated; and when abnormality of the current working state of the target power battery is determined, a fault processing operation is triggered. According to the invention, with the method and equipment, the current working state of the power battery can be estimated accurately with low costs.

Description

technical field [0001] The present invention relates to a vehicle power battery fault diagnosis method and equipment, more particularly, to a vehicle power battery fault diagnosis method and equipment based on battery terminal voltage estimation. Background technique [0002] At present, with the increasing popularity of electric vehicles and hybrid vehicles, real-time fault diagnosis for the power battery in the vehicle (that is, the power source that provides the main power or auxiliary power for the vehicle) is becoming more and more important. For example, the normal operation of the power battery in the vehicle needs to rely on the battery management system to accurately estimate the current state of the power battery based on the current working parameters of the power battery (such as working voltage, working current or working temperature), while the current working parameters of the power battery rely on the The data transmitted by the corresponding sensor, therefor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/392G01R31/385
Inventor 王佳元曹铮王章保顾英哲
Owner SAIC GENERAL MOTORS
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