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Bus-type lithium battery pack balance system prediction control method

A technology of balancing system and lithium battery pack, applied in charge balancing circuits, secondary batteries, battery circuit devices, etc., can solve the problems of not considering the efficiency of energy transfer, only considering the balancing speed, etc.

Inactive Publication Date: 2017-09-05
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equilibrium control strategy is the core of the equilibrium system. Although there are some effective equilibrium control methods in the existing technology, most of these algorithms only consider the equilibrium speed and do not consider the efficiency of energy transfer.
It is still blank to introduce the balance efficiency factor into the balance control algorithm to improve the balance efficiency from the algorithm, which urgently requires those skilled in the art to solve the corresponding technical problems

Method used

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  • Bus-type lithium battery pack balance system prediction control method
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  • Bus-type lithium battery pack balance system prediction control method

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Embodiment Construction

[0077] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0078] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention provides a bus-type lithium battery pack balance system prediction control method, which comprises steps: 1, a state space model for the lithium battery pack balance system is built; 2, an outer loop controller adopts the prediction control method, the balance speed and the balance efficiency are considered at the same time, and the power of a single battery in the battery pack is predicted and controlled; and 3, an inner loop controller adopts a PI controller form to realize that power of the battery changes according to a scheduled track through controlling the balance current of the single battery and the energy bus voltage.

Description

technical field [0001] The invention relates to the field of automation control, in particular to a predictive control method for a bus-type lithium battery pack equalization system. Background technique [0002] The energy that a single battery can provide is limited, and batteries are often used in groups. However, due to the constraints of the production process level, there are certain differences in the initial maximum capacity and internal resistance of the battery. During the long-term charging and discharging process, due to differences in the external environment, its own charging and discharging capabilities, and battery performance decay speeds, the differences in maximum capacity and internal resistance of the batteries in the battery pack will become larger and larger. These inconsistencies will cause performance degradation when batteries are used in groups, such as overcharging and overdischarging of single cells in the battery pack, and underutilization of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/42
CPCH01M10/4207H01M10/425H01M2010/4271H02J7/0019Y02E60/10
Inventor 凌睿刘辉伍洲胡青王殿冯洋飞甘坤
Owner CHONGQING UNIV
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