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工業技術研究院

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技術名稱: 估測電池電量之方法與系統

技術簡介

本揭露內容提出一種估測電池電量的方法,其包括提供存有一電池的一開路電壓與一電量的數據的一查閱表,然後初始化此電池使其達到作為放電程序的一起始點的一初始狀態。此方法更包括對此電池放電一第一部分電量,使此電池從初始狀態到達一第一狀態,根據從初始狀態到第一狀態之間放電的一累積放電電量計算電池的一實際電量,量測在第一狀態時的開路電壓,將在第一狀態時的開路電壓代入查閱表得到此電池的一查閱電量,計算實際電量與查閱電量之間的差值,用此差值去修正查閱表。

Abstract

A method for estimating a capacity of a battery is provided includes providing a look-up table SOCring data relating to a voltage and a capacity of the battery, and initializing the battery to reach an initialization state which serves as a starting point for a discharging process. The method also includes discharging the battery, from the initialization state, by a first amount of charge to reach a first state, calculating an actual capacity of the battery based on a measured amount of charge discharged from the initialization state to the first state, measuring an open-circuit voltage at the first state, obtaining a look-up capacity of the battery from the look-up table according to the open-circuit voltage measured at the first state, calculating a difference between the actual capacity and the look-up capacity, and correcting the look-up table based on the difference.

技術規格

殘電量估測誤差<5% (與量測硬體準確度有關)

Technical Specification

none

技術特色

對於充電電壓在3.6V的鋰電池材料系統(Ex: 磷酸鐵鋰電池)發展出殘電量估測方法,在高精確的量測硬體電路,能達到殘電量估測誤差<5%,且本技術還具備估測電池老化的電容量之能力,並以老化電容量修正殘電量,因此電池殘電量的準確性不受到電池老化之影響。

應用範圍

3C產品、電動相關載具(電動自行車/機車/汽車等)、任何需要顯示電量之產品

接受技術者具備基礎建議(設備)

具備充放電機或電子電路設計之相關設備

接受技術者具備基礎建議(專業)

具備BMS硬體設計能力

技術分類 電池技術

聯絡資訊

聯絡人:孫建中 儲能材料及技術研究組

電話:+886-3-5912774 或 Email:scc_mcl.n300@itri.org.tw

客服專線:+886-800-45-8899

傳真:+886-35820442

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