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Battery management device, battery management method and battery pack

A battery management, battery technology, applied in battery circuit devices, circuit devices, measurement devices, etc., can solve problems such as noise, adjustment of ampere count, and reliability of equivalent circuit models

Active Publication Date: 2021-03-09
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since a fixed value is assigned to each process noise, it is difficult to appropriately adjust the reliability of each of the ampere count and the equivalent circuit model for the operating state of the battery and the environment in which the battery is used

Method used

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  • Battery management device, battery management method and battery pack
  • Battery management device, battery management method and battery pack
  • Battery management device, battery management method and battery pack

Examples

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Embodiment Construction

[0041] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms or words used in the specification and appended claims should not be construed as limited to the ordinary and dictionary meanings, but should be used to allow the inventor to properly define the terms to obtain the best interpretation. On the basis of principles, interpretations are made based on the meanings and concepts corresponding to the technical aspects of the present disclosure.

[0042] Therefore, the embodiments described herein and the illustrations shown in the drawings are only the most preferred examples of the present disclosure, and are not intended to completely describe the technical aspects of the present disclosure, so it Various other equivalents and modifications are made.

[0043] Terms including ordinal numbers such as "first," "second," etc. may be us...

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Abstract

A battery management device, a battery management method and a battery pack are provided. The battery management device comprises: a sensing unit for detecting the current, voltage and temperature ofa battery; and a control unit. The control unit decides a first candidate value of the state of charge of the battery by means of ampere counting. The control unit decides a second candidate value ofthe state of charge and a Kalman gain by means of an extended Kalman filter. The control unit decides the first candidate value as the state of charge if the differential value between the first candidate value and second candidate value is greater than a threshold value. The control unit adjusts the ratio of a second process noise relative to a first process noise of the extended Kalman filter with respect to a reference ratio on the basis of a first component and a second component of the Kalman gain.

Description

technical field [0001] The present disclosure relates to battery state of charge (SOC) estimation. [0002] This application claims priority from Korean Patent Application No. 10-2019-0014609 filed in Korea on February 7, 2019, the disclosure of which is incorporated herein by reference. Background technique [0003] Recently, the demand for portable electronic products such as notebook computers, video cameras, and mobile phones has increased dramatically, and with the widespread development of electric vehicles, energy storage batteries, robots, and satellites, many studies have been conducted on rechargeable batteries . [0004] Currently, commercially available batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium batteries, etc., and among them, lithium batteries have little or no memory effect, and because they have the advantage that they can be replaced whenever it is convenient Recharge, self-discharge rates are very...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/36G01R31/382
CPCG01R31/367G01R31/3842Y02E60/10G01R31/3648G01R31/382H02J7/0048H02J7/00712
Inventor 林宝美
Owner LG ENERGY SOLUTION LTD
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