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A method and system for SOC estimation based on cloud big data platform

A big data platform and cloud computing technology, applied in the field of SOC estimation, can solve the problems of increasing estimation error and unchangeable algorithm.

Active Publication Date: 2022-03-25
SHENZHEN AUTOMOTIVE RES INST BEIJING INST OF TECH (SHENZHEN RES INST OF NAT ENG LAB FOR ELECTRIC VEHICLES)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved in the present invention is the technical problem that the SOC estimation error increases due to the unchangeable algorithm of the electric vehicle in the prior art

Method used

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  • A method and system for SOC estimation based on cloud big data platform
  • A method and system for SOC estimation based on cloud big data platform
  • A method and system for SOC estimation based on cloud big data platform

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Embodiment 1

[0056] Please refer to figure 1 , is a schematic flow chart of an SOC estimation method in an embodiment, including:

[0057] Step 100, acquire data.

[0058] Receive the vehicle battery data uploaded by the electric vehicle. Vehicle battery data includes collection time of each charge and discharge cycle, battery charge and discharge current, cell voltage, cell temperature, current accumulative battery cycle times, battery capacity change, battery factory information, battery fault information and / or vehicle terminal calculations SOC value. In one embodiment, the electric vehicle includes a vehicle-side battery data acquisition device and a vehicle communication module, the vehicle-side battery data acquisition device is used to obtain vehicle-side battery data, and the vehicle-side communication module is used to upload the vehicle-side battery data to the cloud big data platform.

[0059] In one embodiment, the electric vehicle uploads the battery data of the vehicle ter...

Embodiment 2

[0083] Please refer to Figure 4 , is a schematic diagram of the structure of the SOC estimation system in an embodiment, including a cloud big data platform 1, which is used to obtain the vehicle-end battery data uploaded by the electric vehicle 2, and obtain the SOC estimation method and SOC of the electric vehicle 2 according to the vehicle-end battery data correction coefficient, and then send the obtained SOC estimation method, cloud computing SOC value and SOC correction coefficient to the electric vehicle 2, so as to update the SOC estimation method and SOC correction coefficient of the electric vehicle 2. The vehicle battery data includes the ID of the electric vehicle, the collection time of each charging and discharging cycle, the charging and discharging current of the battery, the voltage of the battery cell, the temperature of the battery cell, the current accumulated cycle times of the battery, the change of the battery capacity, the factory information of the bat...

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Abstract

This application discloses a method for estimating SOC based on a cloud big data platform. Firstly, it receives the vehicle-end battery data uploaded by electric vehicles, and preprocesses the vehicle-end battery data; The SOC estimation type of the vehicle, where each SOC estimation type corresponds to a SOC estimation algorithm; then obtain the cloud computing SOC value and SOC correction coefficient of the electric vehicle according to the SOC estimation algorithm corresponding to the SOC estimation type of the electric vehicle, and then obtain The SOC estimation algorithm, cloud computing SOC value and SOC correction coefficient are sent to the electric vehicle. The SOC value of the electric vehicle can be calculated through the cloud big data platform, and the SOC value of the vehicle end can be corrected when the vehicle working condition is satisfied, which can not only simplify the algorithm of the BMS end of the electric vehicle to reduce the corresponding storage space, but also can By improving the SOC estimation algorithm of the cloud big data platform, the SOC estimation algorithm for maintaining the electric vehicle is realized, so as to simplify the after-sales service process of electric vehicles.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle battery management and controllers, in particular to a method and system for SOC estimation based on a cloud big data platform. Background technique [0002] As the core component of new energy vehicles, batteries mainly provide electric energy for new energy vehicles, but because the remaining battery power cannot be accurately estimated, the driver cannot determine the mileage that new energy vehicles can travel under the current remaining power; especially when When the battery is low, this problem is more serious, and drivers generally suffer from range anxiety. The estimation of the remaining battery power is inaccurate. The main reasons include: 1) Due to the differences in the physical characteristics of each battery pack, the user's charging habits (charging times and charging methods), and the actual driving conditions of new energy vehicles (including There are differences in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/382G01R31/367G06K9/62H01M10/48
CPCG01R31/382G01R31/367H01M10/48G06F18/10Y02E60/10
Inventor 王文伟陈填魏波
Owner SHENZHEN AUTOMOTIVE RES INST BEIJING INST OF TECH (SHENZHEN RES INST OF NAT ENG LAB FOR ELECTRIC VEHICLES)