Soc estimation device for secondary battery
US-2017010327-A1 · Jan 12, 2017 · US
Device and method for estimating state of battery
US2018024199A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018024199-A1 |
| Application number | US-201615541613-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 28, 2016 |
| Priority date | Jan 28, 2015 |
| Publication date | Jan 25, 2018 |
| Grant date | — |
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Abstract
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The present invention relates to an apparatus and a method for estimating a state of a battery, and more particularly, an apparatus for estimating a state of a battery includes: a first SOC estimating unit estimating a first state of charging (SOC) of the battery based on open circuit voltage and a temperature of the battery; a first SOH estimating unit estimating a first state of health of the battery based on the first SOC and the current of the battery; and a second SOC estimating unit estimating a second SOC of the battery based on the first SOH, charging/discharging voltage, the temperature, and the current of the battery or estimating the second SOC of the battery based on the charging/discharging voltage, the temperature, and the current of the battery.
First claim
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1 . An apparatus for estimating a state of a battery, the apparatus comprising: a first SOC estimating unit estimating a first state of charging (SOC) of the battery based on open circuit voltage (OCV) and a temperature of the battery; a first SOH estimating unit estimating a first state of health (SOH) of the battery based on the first SOC and current of the battery; and a second SOC estimating unit estimating a second SOC of the battery based on the first SOH, charging/discharging voltage, the temperature, and the current of the battery or estimating the second SOC of the battery based on the charging/discharging voltage, the temperature, and the current of the battery. 2 . The apparatus for estimating a state of a battery of claim 1 , wherein when the second SOC estimating unit receives the first SOH of the battery, the second SOC estimating unit estimates the second SOC of the battery based on the first SOH, the charging/discharging voltage, the temperature, and the current of the battery. 3 . The apparatus for estimating a state of a battery of claim 1 , further comprising: an OCV measuring unit measuring the OCV of the battery after a conduction time of the battery passes a predetermined time. 4 . The apparatus for estimating a state of a battery of claim 1 , wherein the first SOH estimating unit estimates the first SOH of the battery by using a first SOC change value of the battery and a current integration value of the battery. 5 . The apparatus for estimating a state of a battery of claim 1 , wherein the second SOC estimating unit estimates the second SOC of the battery by using a current integration method. 6 . The apparatus for estimating a state of a battery of claim 1 , further comprising: a setting unit setting the second SOC and the first SOH of the battery as a final SOC and a final SOH of the battery, respectively. 7 . A battery management system comprising: the apparatus for estimating a state of a battery of claim 1 . 8 . A method for estimating a state of a battery, the method comprising: estimating, by a first SOC estimating unit, a first SOC of the battery based on OCV and a temperature of the battery; estimating, by a first SOH estimating unit, a first SOH of the battery based on the first SOC and current of the battery; and estimating, by a second SOC estimating unit, a second SOC of the battery based on the first SOH, charging/discharging voltage, the temperature, and the current of the battery or estimating the second SOC of the battery based on the charging/discharging voltage, the temperature, and the current of the battery. 9 . The method for estimating a state of a battery of claim 8 , wherein the estimating of the second SOC of the battery includes estimating, by the second SOC estimating unit, the second SOC of the battery based on the first SOH, the charging/discharging voltage, the temperature, and the current of the battery when the second SOC estimating unit receives the first SOH of the battery. 10 . The method for estimating a state of a battery of claim 8 , further comprising: measuring, by an OCV measuring unit, the OCV of the battery after a conduction time of the battery passes a predetermined time. 11 . The method for estimating a state of a battery of claim 8 , wherein the estimating of the first SOH of the battery includes estimating, by the first SOH estimating unit, the first SOH of the battery by using a first SOC change value of the battery and a current integration value of the battery. 12 . The method for estimating a state of a battery of claim 8 , wherein the estimating of the second SOC of the battery further includes estimating, by the second SOC estimating unit, the second SOC of the battery by using a current integration method. 13 . The method for estimating a state of a battery of claim 8 , further comprising: setting, by a setting unit, the second SOC and the first SOH of the battery as a final SOC and a final SOH of the battery, respectively.
Assignees
Inventors
Classifications
Determining battery ageing or deterioration, e.g. state of health · CPC title
- G01R31/3842Primary
combining voltage and current measurements · CPC title
- G01R31/2812Primary
Checking for open circuits or shorts, e.g. solder bridges; Testing conductivity, resistivity or impedance (of connections G01R31/66) · CPC title
Physics · mapped topic
- G01R31/3651Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US2018024199A1 cover?
- The present invention relates to an apparatus and a method for estimating a state of a battery, and more particularly, an apparatus for estimating a state of a battery includes: a first SOC estimating unit estimating a first state of charging (SOC) of the battery based on open circuit voltage and a temperature of the battery; a first SOH estimating unit estimating a first state of health of the…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01R31/3842. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Jan 25 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).