Method and system for obtaining degradation of battery using degradation model and parameters related to the degradation

• US 9,217,779 B2
• Filed: 11/27/2012
• Issued: 12/22/2015
• Est. Priority Date: 06/24/2010
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Xu, Ming, Nakamura, Yasuhiro, Chen, Ning, Zhang, Xiaofei, Zhao, Frank, Goto, Yoshimasa
• Primary Examiner(s): Barbee, Manuel L
• Application Number:
  US13/686,052
• Publication Number:
  US 20130085696A1
• Time in Patent Office: 1,120 Days
• Field of Search: 702/57, 702 63- 65, 320/128, 320/132, 320/135, 320/160
• US Class Current: 1/1
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/16 responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• CPC Class Codes: G06F 17/40 Data acquisition and logging for input to computer G06F3/00
• CPC Class Codes: H04Q 2209/43 using wireless personal area networks [WPAN], e.g. 802.15, 802.15.1, 802.15.4, Bluetooth or ZigBee
• CPC Class Codes: H04Q 2209/47 using RFID associated with sensors
• CPC Class Codes: H04Q 2209/84 Measuring functions
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

The present disclosure provides a method for obtaining degradation of a battery comprising the steps of collecting data of the battery and data related to the degradation of the battery; processing the collected data to obtain parameters related to the degradation of the battery; creating and updating a degradation model for the battery with the obtained parameters; and computing the degradation of the battery by using the degradation model and the parameters.

Claims

1. A method for obtaining degradation of a battery, comprising:

collecting data of the battery and data related to the degradation of the battery, and processing the collected data to obtain parameters related to the degradation of the battery;

creating and updating a degradation model for the battery using the obtained parameters;

computing the degradation of the battery using the degradation model and the parameters related to the degradation;

creating an initial degradation model for the battery or updating the computed degradation model or calibrating the degradation model, based on the values of actually measured battery degradation and the obtained parameters related to the degradation;

storing successively the obtained parameters related to the degradation to form a degradation parameter log; and

displaying when the battery has to be changed based on the degradation model,

wherein the parameters related to the degradation comprises a quadrant parameter set of a parameter of the battery, a parameter of vehicle type and on-vehicle electronics, a parameter of traveled road condition, and a parameter of environment.

2. The method of claim 1, wherein the quadrant parameter set comprises data for battery ID, battery brand, battery model, battery type, battery quality, battery date of production, battery producer'"'"'s prices, rated full charge amount, discharge current, discharge voltage, battery internal resistance, and ambient temperature.

3. A system for obtaining degradation of a battery, comprising:

a data collector configured to collect data of the battery and data related to the degradation of the battery, process the collected data to obtain parameters related to the degradation of the battery, and store the obtained parameters successively in a degradation parameter log;

a model creator and updater configured to create and update a degradation model for the battery with the obtained parameters, and to create an initial degradation model for the battery or update the computed degradation model or calibrate the degradation model, based on the values of actually measured battery degradation and the obtained parameters related to the degradation;

a degradation calculator configured to compute the degradation of the battery by using the degradation model and the obtained parameters related to the degradation; and

a display configured to display when the battery has to be changed based on the degradation model,

wherein the degradation model comprises a parameter of battery attribute, a parameter of battery charge/discharge, a parameter of battery use environment, and a parameter of vehicle.