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Method for estimating state of health of battery

A state-of-health, battery technology, used in battery/fuel cell control devices, measuring electricity, electric vehicles, etc., can solve problems such as unreliable accuracy, achieve uncomplicated calculation process, simple hardware configuration, scalability and adaptability improved effect

Pending Publication Date: 2021-10-26
SAMSUNG SDI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these traditional methods have problems in that the battery must be discontinued, must be matched to specific conditions or environments, or have unreliable accuracy due to accumulated sensor errors or estimation errors

Method used

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  • Method for estimating state of health of battery
  • Method for estimating state of health of battery
  • Method for estimating state of health of battery

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Embodiment Construction

[0044] Advantages and features of the present disclosure and ways of achieving them will become apparent by referring to embodiments which will be described in detail later with reference to the accompanying drawings. However, the present disclosure is not limited to the embodiments given below, but can be implemented in various forms, and it should be understood that all changes, equivalents, and substitutions that do not depart from the spirit and technical scope of the invention are included in In this disclosure. The embodiments given below are provided to make the disclosure of the present disclosure complete and to fully convey the scope of the present disclosure to those skilled in the art to which the present disclosure pertains. In the description of the present disclosure, some detailed explanations of related arts are omitted when it is considered that they may unnecessarily obscure the essence of the present disclosure.

[0045] The terms used in the present appli...

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Abstract

Provided is a method for estimating the state of health of a battery according to various embodiments. A method for estimating the state of health of a battery according to one embodiment, comprises: a step for measuring the voltage and the current of a battery in use to periodically generate a voltage value and a current value; a step for updating, in real time, the value of a G parameter and the value of an H parameter representing the current state of the battery from the voltage value and the current value using an adaptive filter; and a step for estimating, in real time, the state of health of the battery using the preset initial value and end value of the G parameter and the current value of the G parameter. The G parameter is a parameter representing the sensitivity of a voltage with respect to a current change of the battery, and the H parameter is a parameter representing the effective electric potential determined by local equilibrium electric potential distribution and resistance distribution in the battery.

Description

technical field [0001] The invention relates to a method for estimating the state of health (SOH, state of health) of a battery in real time. Background technique [0002] Batteries have high applicability compared with other energy storage devices, and due to characteristics such as relatively high energy and power density, batteries have been widely used in electric vehicles (EV, electric vehicles) driven by electric drive sources, hybrid electric vehicles (HEV, hybrid electric vehicles) and portable devices. In particular, when a strong output is required, a battery pack in which a plurality of batteries are connected in series and in parallel may also be used. [0003] Battery management is very important for energy saving and safe use of multi-battery or single-battery powered electrical devices, for which accurate estimation and diagnosis of battery status is crucial. Currently widely used estimation values ​​may include state of charge (SOC, state of charge), state ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/392G01R31/382G01R31/396G01R31/36G01R31/367B60L58/16
CPCB60L58/16G01R31/367G01R31/392Y02T10/70B60L2240/547B60L2240/549G01R31/3842G01R31/382G01R31/396G01R31/3648
Inventor 林炳熙黄龙俊克里斯托伯·雷亚潘金纪宪金济益白承郁
Owner SAMSUNG SDI CO LTD
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