Wireless network based battery management system
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.
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, the off-board data processing device configured to:
establish and validate at least one first off-board battery model by processing the stored data; and
generate parameters of a second off-board battery model, which has a different and simplified form compared to the at least one first off-board battery model, by mapping parameters of the at least one first off-board battery model into the second off-board battery model; and
an on-board subsystem having an on-board data processing device, the on board data processing device configured to:
select an on-board battery model corresponding to the second off-board battery model;
update a parameter of the on-board battery model with the generated parameters of the second off-board battery model; and
calculate a battery status of the target on-board battery system using the on-board battery model.
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 second 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 second off-board battery model and the 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 data processing device of the off-board subsystem is configured to calculate optimal parameters of the first off-board battery models by an approximation method using the stored data.
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 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 the target on-board battery system and data of other battery systems;
establishing and validating at least one first off-board battery model by processing the data stored in the off-board data storage with an off-board data processing device of the off-board subsystem;
acquiring the measured battery variables as parameters of the at least one first off-board battery model and calculating the at least one first off-board battery model;
generating parameters of a second off-board battery model, which has a different and simplified form compared to the at least one first off-board battery model, by mapping the parameters of the least one first off-board battery model into the second off-board battery model with the off-board data processing device of the off-board subsystem;
selecting an on-board battery model corresponding to the second off-board battery model with an on-board data processing device of the on-board subsystem;
updating a parameter of the on-board battery model with the generated parameters of the second off-board battery model with the on-board data processing device of the on-board subsystem; and
calculating a battery status of the target on-board battery system using the generated parameters with the on-board data processing device of the on-board subsystem.