Wireless Network Based Battery Management System

• US 20170328956A1
• Filed: 11/28/2014
• Published: 11/16/2017
• Est. Priority Date: 11/28/2014
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Mingliang Zhang, Robert Bosch GmbH
• Inventors: ZHANG, MingLiang
• Granted Patent: US 10,162,010 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 50/66 Arrangements of batteries
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: H04Q 9/02 Automatically-operated arrangements
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations

Abstract

A wireless network based battery management system is provided, which comprises an off-board subsystem and an on-board subsystem, wherein the off-board subsystem comprising an off-board data storage for storing historic data of a on-board battery system and data of other battery systems, and an off-board data processing device for analyzing and processing the stored data and establishing and validating off-board battery models, mapping the accurate and complex off-board battery models into a simple off-board battery model, and generating parameters of the simple off board battery mode, and wherein the on-board subsystem selects a simple on-board battery mode corresponding to the simple off-board battery mode, updating parameter of the simple on-board battery mode with those of the simple off-board battery mode, and calculates battery status of the on-board battery system. A method of using the wireless network based battery management system described above is also provided.

Claims

1. A wireless network based battery management system comprising:

an off-board subsystem including (i) an off-board data storage configured to store data including historic data of a target on-board battery system and data of other battery systems, and (ii) an off-board data processing device configured to analyze and process the stored data, to establish and validate accurate and complex off-board battery models, to map the off-board battery models into a first simple off-board battery model, and to generate parameters of the first simple off-board battery model; and

an on-board subsystem configured to select a second simple on-board battery model corresponding to the first simple off-board battery model, to update a parameter of the second simple on-board battery model with the generated parameters of the first simple off-board battery model, and to calculate a battery status of the target on-board battery system.

2. The wireless network based battery management system according to claim 1, wherein the off-board data storage of the off-board subsystem is an internet based data storage.

3. The wireless network based battery management system according to claim 1, wherein the battery status is at least one of the following:

a state of charge, a state of health, and a life estimation.

4. The wireless network based battery management system according to claim 1, wherein the on-board subsystem is configured to measure battery variables of the target on-board battery system and transmit the measured battery variables to the off-board data storage of the off-board subsystem via wireless communication.

5. The wireless network based battery management system according to claim 1, wherein the off-board subsystem is configured to transmit the generated parameters of the first simple off-board battery model to the on-board subsystem via wireless communication.

6. The wireless network based battery management system according to claim 1, wherein the first simple on-board battery model and the second simple on-board battery model are one of Internal Resistance Equivalent Models and One Order RC models.

7. The wireless network based battery management system according to claim 1, wherein the off-board subsystem is configured to calculate optimal parameters of the accurate and complex off-board battery models by an approximation method.

8. The wireless network based battery management system according to claim 7, wherein the approximation method is a least square method.

9. The wireless network based battery management system according to claim 1, wherein the on-board subsystem is arranged in a target vehicle, and the off-board subsystem is arranged remote from the target vehicle.

10. A method of using a wireless network based battery management system having an off-board subsystem and an on-board subsystem, the method comprising:

measuring battery variables of a target on-board battery system in real-time with the the on-board subsystem;

transmitting the measured battery variables to an off-board data storage of the off-board subsystem, the off-board data storage being configured to store data including historic data of a target on-board battery system and data of other battery systems;

analyzing and processing the data stored in the off-board data storage with an off-board data processing device of the off-board subsystem;

establishing and validating off-board battery models with the off-board data processing device of the off-board subsystem;

acquiring the measured battery variables as parameters of the off-board battery models and calculating the off-board battery models;

mapping the off-board battery models into a first simple off-board battery model with the off-board data processing device of the off-board subsystem;

generating parameters of the simple off-board battery model with the off-board data processing device of the off-board subsystem;

selecting a second simple on-board battery model corresponding to the first simple off-board battery model with the on-board subsystem;

updating a parameter of the second simple on-board battery model with the generated parameters of the first simple off-board battery model; and

calculating battery status of the target on-board battery system with the generated parameters.