Identification method of battery pack inconsistency

An identification method and battery pack technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems affecting the performance of battery packs, and achieve the effect of improving power performance
CN107015152AInactive Publication Date: 2017-08-04UNIV OF SHANGHAI FOR SCI & TECH
2 Cites 14 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SHANGHAI FOR SCI & TECH
Publication Date
2017-08-04
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an identification method of battery pack inconsistency. A frequency division model is adopted. An average battery model and a differential battery model are included. An extended Kalman filter EKF algorithm is combined to realize identification of battery pack inconsistency. The method comprises the following steps of firstly, using a current sensor, a voltage sensor and a temperature sensor to collect work data of a battery pack; further, using the average battery model, combining an EKF algorithm and using a high frequency mode to estimate an average charge state of the battery pack; and finally, near an average SOC of the battery pack, using the differential battery model, combining the EKF algorithm and using a low frequency mode to estimate a difference between a monomer battery SOC and the average SOC of the battery pack. In the invention, the battery pack inconsistency can be accurately identified through a low calculated amount, then battery pack equalization or fault diagnosis is realized, and dynamic performance, safety and endurance of the battery pack are increased.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a battery technology, in particular to a method for identifying the inconsistency of a battery pack. Background technique

[0002] With the deteriorating global environment and the vigorous development of electric vehicles and electric energy storage, power batteries are widely valued as the main power source. Single cells are limited by their performance parameters such as voltage, capacity, and power, and often cannot be used alone in fields such as electric vehicles and electric energy storage. Instead, single cells need to be connected in series and parallel to form a group before use.

[0003] The inconsistency of the battery pack is the most significant feature that distinguishes the battery pack from the battery cells, and its inconsistency further affects the power, safety and durability of the battery pack. In addition, some batteries are sensitive to overcharging and overdischarging, both of which can cause permanent...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More