Synchronous battery information acquisition device based on FlexRay bus

A technology for battery information and synchronous acquisition, applied in the field of energy storage, can solve the problem of unsatisfactory synchronous acquisition, and achieve the effect of improving lifespan, safety, and computing accuracy

Inactive Publication Date: 2014-01-22
BEIJING JIAOTONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, CAN bus is mostly used as a distributed collection method for communication. Although this solution can realize the collection and interaction of multiple battery cell information, it is not ideal for synchronous collection.

Method used

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  • Synchronous battery information acquisition device based on FlexRay bus
  • Synchronous battery information acquisition device based on FlexRay bus
  • Synchronous battery information acquisition device based on FlexRay bus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] A battery information synchronous acquisition device based on the FlexRay bus, such as figure 1 As shown, its external devices are 96 battery cells under test, and the device includes 8 battery information collection devices, 1 central battery management device and a FlexRay bus for communication between the battery information collection device and the central battery management device;

[0028] The above-mentioned battery information collection device is used for collecting the current of 12-way series batteries and collecting the voltage and temperature of each battery cell in the 12-way series-connected batteries. The battery information collection device is as follows: figure 2 As shown, it includes a central processing unit circuit, a FlexRay bus interface circuit, a real-time clock circuit, a battery cell voltage acquisition circuit, a battery cell temperature acquisition circuit and a series battery current acquisition circuit;

[0029] In the above-mentioned b...

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PUM

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Abstract

The invention relates to a synchronous battery information acquisition device based on a FlexRay bus, and belongs to the technical field of energy storage. The device comprises more than one battery information acquisition devices, a central battery management device and the FlexRay bus for communication of the battery information acquisition devices and the central battery management device, wherein the battery information acquisition devices are used for providing synchronous sampling starting time points for a battery monomer voltage acquisition circuit, a battery monomer temperature collection circuit and a series battery current acquisition circuit according to static time slots of the FlexRay bus and sending start control signals, so that synchronous sampling of each acquisition circuit is realized. The synchronous battery information acquisition device based on the FlexRay bus utilizes a self-synchronizing mechanism of the FlexRay bus to synchronously acquire information including voltage, current and temperatures of a plurality of battery monomers, so that SOC (state of charge) and computation accuracy of an internal resistance model of the whole battery pack can be improved, a more reasonable running state of the battery pack is obtained, accordingly, the service life of the battery pack is prolonged, and the safety is improved.

Description

technical field [0001] The invention relates to a battery information synchronous acquisition device based on a FlexRay bus, which belongs to the technical field of energy storage. Background technique [0002] For many objects related to energy storage, such as electric vehicles and energy storage power stations, the overall performance is often largely determined by the performance of the battery. However, due to the limitation of battery cell capacity and voltage, many energy storage devices are in the form of battery packs, that is, many single cells are connected in series and parallel to work together. At this time, the parameters required for battery management are not only voltage , current, it is also important to calculate the SOC (State Of Charge) of the battery pack and estimate the internal resistance. [0003] For the case where it is necessary to calculate the battery internal resistance model and SOC more accurately, it is very important to synchronize the v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 刘彪李相俊李春栋陆长海赵鹏
Owner BEIJING JIAOTONG UNIV
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