JPWO2020084386A1 - 二次電池の充電制御回路及び異常検知システム - Google Patents
二次電池の充電制御回路及び異常検知システム Download PDFInfo
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H—ELECTRICITY
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- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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Abstract
Description
図2A、図2Bは本発明の一態様を示すブロック図である。
図3は本発明の一態様を示すブロック図である。
図4Aは本発明の一態様を示す電気自動車のブロック図であり、図4Bは二次電池の斜視図である。
図5は本発明の一態様を示すブロック図である。
図6A、図6B、図6C、図6D、図6E、図6F、図6Gは、メモリの回路構成例を説明する図である。
図7はトランジスタの一例を説明する断面図である。
図8はトランジスタの一例を説明する断面図である。
図9A、図9B、図9Cは、トランジスタの一例を説明する断面図である。
図10は本発明の一態様を示すブロック図である。
図11A、図11B、図11Cは、移動体の一例を示す図である。
図12A、図12Bは、二次電池の一例を示す斜視図であり、図12Cは二次電池の充電時のモデル図である。
温度制御する二次電池(以下バッテリとも呼ぶ)の異常検知システムBTOS(Battery operating system、又はBattery oxide semiconductor)(BMS:バッテリーマネージメントシステム)の全体ブロック図を図1に示す。
本実施の形態では、図4Aを用いて電気自動車(EV)に適用する例を示す。
本実施の形態では、記憶手段の回路構成例を図6A乃至図6Gに示す。図6A乃至図6Gは、それぞれが記憶素子として機能する。図6Aに示す記憶素子410は、トランジスタM1と、容量素子CAと、を有する。記憶素子410は、1つのトランジスタと1つの容量素子を有する記憶素子である。
本実施の形態では、上記実施の形態で説明した記憶素子の構成に適用可能なトランジスタの構成、具体的には異なる電気特性を有するトランジスタを積層して設ける構成について説明する。特に本実施の形態では、半導体装置を構成するメモリ回路が有する各トランジスタの構成について説明する。当該構成とすることで、半導体装置の設計自由度を高めることができる。また、異なる電気特性を有するトランジスタを積層して設けることで、半導体装置の集積度を高めることができる。
本実施の形態では、加熱装置132、及び冷却装置131に加えて、さらにアラームなどを鳴らして使用者に警告を示す例を図10に示す。図10はブロック図であり、図1と一部異なるだけであるため、同じ部分の説明はここでは省略することとする。
温度制御する二次電池(以下バッテリとも呼ぶ)の異常検知システムの全体ブロック図を図5に示す。
Claims (11)
- 二次電池の温度を検出する温度センサと、
前記温度センサからのアナログ信号を入力し、パルス信号を生成する第1の温度比較回路及び第2の温度比較回路と、
前記第1の温度比較回路で設定した2つの温度範囲内で動作する前記二次電池の加熱装置と、
前記第2の温度比較回路で設定した2つの温度範囲内で動作する前記二次電池の冷却装置とを有する二次電池の充電制御回路。 - 請求項1において、前記第1の温度比較回路は、2つの閾値を持つコンパレータを含む二次電池の充電制御回路。
- 請求項1または請求項2において、前記二次電池の充電制御回路は、二次電池の充電の電流を遮断するスイッチのオンオフを制御する二次電池の充電制御回路。
- 請求項1乃至3のいずれか一において、前記二次電池の充電制御回路は、少なくとも記憶手段を有し、記憶手段はアナログ信号を保持する機能を有し、酸化物半導体を半導体層とするトランジスタを含む二次電池の充電制御回路。
- 二次電池の温度を検出する温度センサと、
前記温度センサからのアナログ信号を入力し、パルス信号を生成する温度比較回路と、
温度比較回路で設定した温度範囲内で動作する音響装置と、
記憶手段を有し、
前記温度比較回路は、2つの閾値を持つコンパレータを含み、
前記記憶手段はアナログ信号を保持する機能を有し、酸化物半導体を半導体層とするトランジスタを含む二次電池の充電制御回路。 - 請求項1乃至5のいずれか一において、前記二次電池の充電制御回路は、プリント基板上に設けられる二次電池の充電制御回路。
- 二次電池の温度調節装置がある温度範囲内のみで駆動するように充電制御回路で設定するステップと、
二次電池の充電の電流を遮断するスイッチをオフとして二次電池の充電を行うステップと、
二次電池の温度を温度センサで検出するステップと、
二次電池の温度が設定した前記温度範囲の上限に達した時、二次電池の充電の電流を遮断するスイッチをオンとして充電を停止するステップと、
二次電池の温度が設定した前記温度範囲の上限よりも低い温度となるように温度調節装置を駆動させて二次電池の温度を低下させるステップと、を有する二次電池の異常検知システム。 - 二次電池の温度調節装置がある温度範囲内のみで駆動するように充電制御回路で設定するステップと、
二次電池の温度を温度センサで検出するステップと、
二次電池の温度が設定した前記温度範囲よりも高い温度または前記温度範囲よりも低い温度となると音響装置が起動して警報を発するステップと、を有する二次電池の異常検知システム。 - 請求項7または請求項8において、前記温度範囲は、45℃以上60℃以下である二次電池の異常検知システム。
- 二次電池の温度調節装置がある温度範囲内のみで駆動するように充電制御回路で設定するステップと、
二次電池の充電の電流を遮断するスイッチをオフとして二次電池の充電を行うステップと、
二次電池の温度を温度センサで検出するステップと、
二次電池の温度が設定した前記温度範囲の下限に達した時、二次電池の充電の電流を遮断するスイッチをオンとして充電を停止するステップと、
二次電池の温度が設定した前記温度範囲の下限よりも高い温度となるように温度調節装置を駆動させて二次電池の温度を上昇させるステップと、を有する二次電池の異常検知システム。 - 請求項8または請求項10において、前記温度範囲は、マイナス50℃以上10℃以下である二次電池の異常検知システム。
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