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Real-time evaluation method for remaining capacity of power batteries and device thereof

A technology of residual power and power battery, which is applied in the direction of measuring devices, measuring electrical variables, measuring electricity, etc., can solve problems such as the inability to evaluate and estimate accuracy in real time, and achieve the effect of improving accuracy and eliminating the influence of electromagnetic interference

Active Publication Date: 2013-02-27
INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
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Problems solved by technology

[0010] The present invention provides a real-time evaluation method and device for the remaining power of a power battery to overcome the shortcomings of the prior art that the SOC cannot be evaluated in real time and the estimation accuracy is low

Method used

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  • Real-time evaluation method for remaining capacity of power batteries and device thereof
  • Real-time evaluation method for remaining capacity of power batteries and device thereof
  • Real-time evaluation method for remaining capacity of power batteries and device thereof

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Embodiment Construction

[0020] The content of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Such as figure 1 As shown, the control unit of the data acquisition terminal communicates with the battery management system through the control of the internal CAN interface, and collects the original data of the battery pack from the battery management system, such as the voltage, temperature, and current of the battery, and then the control unit will collect the collected data The data is sent to the GPRS module and sent to the GPRS wireless network through the GPRS module. The host computer receives the data through the GPRS wireless network, and with the help of the powerful computing capability and rich system resources of the host computer software, the extended Kalman filter algorithm is used to process the data of the power battery. Perform processing, accurately calculate the SOC value, and finally send the SOC value calc...

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Abstract

The invention relates to the technical field of automobile power batteries. Due to the fact that a general battery management system adopts an embedded system, the system resources are scarce and remaining capacity of the power batteries cannot be evaluated accurately. The invention discloses a real-time evaluation method for the remaining capacity of the power batteries and a device of the real-time evaluation method. A control unit of a data acquisition terminal is communicated with the battery management system by controlling an inside controller area network (CAN) interface to acquire battery data of a battery pack, and transmits the acquired data to a general packet radio service (GPRS) module which transmits the acquired data to a GPRS wireless network. An upper computer receives the data through the GPRS wireless network, and processes the data of the power batteries through an extend Kalman filtering algorithm to accurately calculate the system on a chip (SOC) value. Finally, the GPRS wireless network transmits the calculated SOC value to the data acquisition terminal to perform display. Therefore, the real-time accurate evaluation on the remaining capacity of the automobile power batteries can be achieved.

Description

technical field [0001] The invention relates to the technical field of automotive power batteries, in particular to a method and device for real-time evaluation of the remaining power of a power battery. Background technique [0002] Accurate estimation of the battery state of charge SOC is the most basic and important content of the battery management system. SOC refers to the current remaining power of the battery, and is also one of the main parameters reflecting the state of the battery. It can provide a basis for judging the vehicle control strategy. If the SOC of the power battery can be accurately estimated, damage to the power battery can be avoided when running other functions of the battery management system, the electric energy provided by the power battery can be reasonably used, and the driving range of the electric vehicle can be effectively controlled and predicted, so as to ultimately extend the battery life. purpose of the service life of the group. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G08C17/02
Inventor 王志平胡战虎
Owner INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI
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