Networked automobile battery management system

A car battery and management system technology, applied in the field of electric vehicles, can solve problems such as poor real-time performance and low calculation accuracy of on-board controllers, and achieve the effect of avoiding loss of accuracy

Pending Publication Date: 2020-06-09
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a networked car battery management system to solve the problems of low calculation accuracy and poor real-time performance of the on-board controller

Method used

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  • Networked automobile battery management system
  • Networked automobile battery management system
  • Networked automobile battery management system

Examples

Experimental program
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Embodiment 1

[0057] as attached figure 1 As shown, the networked vehicle battery management system provided in this embodiment includes a power battery unit, and the power battery unit is used to provide a power source for the networked vehicle; the networked vehicle battery management system includes a vehicle terminal and a cloud The server; the vehicle-mounted terminal includes a battery management unit, a data transceiver processing unit and a vehicle-mounted controller, and the data transceiver processing unit also packs the basic information before sending the information to the cloud server, and then sends it to the cloud server.

[0058] The data sending and receiving processing units in this embodiment are a gateway controller and a Tbox.

[0059] The vehicle terminal of this embodiment also includes a CAN bus, the CAN bus is used for information transmission between the battery management unit and the data receiving and processing unit, and the battery management unit is used to ...

Embodiment 2

[0065] The difference between the networked car battery management system provided in this embodiment and the first embodiment is that, as attached image 3 As shown, the data transceiver unit of the vehicle-mounted terminal of the present embodiment is a 4G / WIFI transmission channel, and here, only the differences with Embodiment 1 are described as follows: the 4G / WIFI transmission channel and the vehicle-mounted controller pass through the CAN bus communication, the 4G / WIFI transmission channel is used to upload the basic information and receive the status information calculated from the cloud server.

Embodiment 3

[0067] This embodiment is based on a networked car battery management system provided by the present invention to realize the SOC estimation algorithm of the single battery, as shown in the attached Figure 4 As shown, the SOC estimation algorithm includes the following steps:

[0068] SOC1: the cloud server obtains the basic information of the single battery at time k: the battery management unit collects the basic information of the single battery, the basic information includes voltage, current and temperature, and transmits the basic information to the The on-board controller uploads the basic information to the cloud server through the data transceiving unit.

[0069] Wherein, in this embodiment, further, the cloud server sorts all the battery cell voltages collected, and records the maximum cell voltage V max , the number Z corresponding to the maximum monomer voltage max , number Z max Monomer temperature T Zmax , the minimum monomer voltage V min The number Z corr...

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Abstract

The invention provides a networked automobile battery management system. A networked automobile comprises an automobile battery for providing a power source for the networked automobile, and the networked automobile battery management system comprises a cloud server and a vehicle-mounted controller located at a vehicle-mounted end. Based on the networked automobile battery management system, the invention further provides an SOC and SOH combined estimation algorithm. The SOC and SOH combined estimation is carried out in a cloud server, so that the algorithm precision loss caused by fixed-pointnumber operation and index lookup approximation of the vehicle-mounted controller is avoided, and the SOC and SOH combined estimation algorithm based on cloud computing can improve the SOC estimationprecision by 2.5-4.5%. The SOH estimation algorithm provided by the invention not only can reflect the DC internal resistance of the battery, but also can calculate the aging state of the internal resistance of the battery under different frequency conditions in real time, characterizes the aging trend of the polarization characteristics of the battery, and can reflect the SOH of the battery morecomprehensively.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a network-connected vehicle battery management system. Background technique [0002] In the field of electric vehicles, the power battery unit is the core component of the electric vehicle. During the operation of the vehicle, it is particularly important to accurately understand the state parameters of the power battery unit in real time. Among them, the SOC determines the current working state of the battery and its output power. At the same time, it affects the SOH, and SOH usually negatively affects the estimation of SOC, output power and remaining energy, so the estimation accuracy of SOC and SOH is a decisive indicator for evaluating the performance of the battery management system. Among them, SOC, English full name State of Charge, battery state of charge; SOH, English full name Section Of Health, battery capacity, health and performance status. [0003] The prior art au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L12/40G08C17/02G08C19/00G01R31/387G01R31/367
CPCH04L67/12H04L12/40G08C17/02G08C19/00H04L2012/40215H04L2012/40273
Inventor 赵晨柴智刚倪传钦刘宁常晓燕
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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