JP7399857B2 - 二次電池の保護回路 - Google Patents
二次電池の保護回路 Download PDFInfo
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- JP7399857B2 JP7399857B2 JP2020529841A JP2020529841A JP7399857B2 JP 7399857 B2 JP7399857 B2 JP 7399857B2 JP 2020529841 A JP2020529841 A JP 2020529841A JP 2020529841 A JP2020529841 A JP 2020529841A JP 7399857 B2 JP7399857 B2 JP 7399857B2
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- Prior art keywords
- oxide
- secondary battery
- insulator
- transistor
- conductor
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Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- 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
- H02J7/00302—Overcharge protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- 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
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- 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
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
- H02J7/0049—Detection of fully charged condition
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- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- H—ELECTRICITY
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E60/10—Energy storage using batteries
Description
図1(A)に二次電池101の異常検出を行う保護回路100のブロック図の一例を示す。
本実施の形態では、実施の形態1とは異なるフローの一例を示す。図5に二次電池を搭載したモバイル機器に対して1回の充電中に複数回の異常検出を行う場合の、フローの一例を示す。
本実施の形態では、第1のメモリ103に複数のトランジスタを用いる例を示す。
本実施の形態では、上記実施の形態に示した保護回路のメモリセルに用いることができるトランジスタの構造例について説明する。
容量及び複数のトランジスタを1つの半導体基板上に形成した半導体装置の構成例を以下に示す。
図10(A)、(B)および(C)を用いてトランジスタ510Bの構造例を説明する。図10(A)はトランジスタ510Bの上面図である。図10(B)は、図10(A)に一点鎖線L1-L2で示す部位の断面図である。図10(C)は、図10(A)に一点鎖線W1-W2で示す部位の断面図である。なお、図10(A)の上面図では、図の明瞭化のために一部の要素を省いて図示している。
図11(A)、(B)および(C)を用いてトランジスタ510Cの構造例を説明する。図11(A)はトランジスタ510Cの上面図である。図11(B)は、図11(A)に一点鎖線L1-L2で示す部位の断面図である。図11(C)は、図11(A)に一点鎖線W1-W2で示す部位の断面図である。なお、図11(A)の上面図では、図の明瞭化のために一部の要素を省いて図示している。
図12(A)、(B)および(C)を用いてトランジスタ510Dの構造例を説明する。図12(A)はトランジスタ510Dの上面図である。図12(B)は、図12(A)に一点鎖線L1-L2で示す部位の断面図である。図12(C)は、図12(A)に一点鎖線W1-W2で示す部位の断面図である。なお、図12(A)の上面図では、図の明瞭化のために一部の要素を省いて図示している。
図13(A)、(B)および(C)を用いてトランジスタ510Eの構造例を説明する。図13(A)はトランジスタ510Eの上面図である。図13(B)は、図13(A)に一点鎖線L1-L2で示す部位の断面図である。図13(C)は、図13(A)に一点鎖線W1-W2で示す部位の断面図である。なお、図13(A)の上面図では、図の明瞭化のために一部の要素を省いて図示している。
本実施の形態では、円筒型の二次電池の例について図14を参照して説明する。円筒型の二次電池600は、上面に正極キャップ(電池蓋)601を有し、側面および底面に電池缶(外装缶)602を有している。これら正極キャップと電池缶(外装缶)602とは、ガスケット(絶縁パッキン)610によって絶縁されている。また、二次電池600の電池缶の底面付近には、樹脂カバーで覆われた保護回路基板618が電気的に接続されている。
二次電池の別の構造例について、図15乃至図18を用いて説明する。
上述した実施の形態では、回路基板に一つの電子部品700を設ける例を示したが、特に限定されず、パッケージ基板(プリント基板)上にインターポーザが設けられ、インターポーザ上にIC半導体装置が複数組み合わされている電子部品730を用いてもよい。電子部品700または電子部品730には、上述した実施の形態の保護回路を有し、二次電池のマイクロショートなどの異常を検知することができる。
図20に二次電池の異常検出を行う保護回路のブロック図の一例を示す。
反転した第1の比較回路の出力信号は、OR回路111に入力され、OR回路111の出力により異常判定できる。
Claims (3)
- 二次電池と電気的に接続される第1の記憶回路と、
前記第1の記憶回路と電気的に接続される比較回路と、
前記比較回路と電気的に接続される第2の記憶回路と、
前記第2の記憶回路と電気的に接続される電源遮断スイッチと、を有し、
前記比較回路は、前記二次電池と電気的に接続され、
前記電源遮断スイッチは、前記二次電池と電気的に接続され、
前記第1の記憶回路は、期間Δtごとにオフセットされた二次電池の電圧値をアナログ方式で保持する機能を有し、
前記比較回路は、前記二次電池の電圧値と、前記第1の記憶回路に保持された前記オフセットされた二次電池の電圧値と、を比較する機能を有し、
前記二次電池の電圧値と前記第1の記憶回路に保持された前記オフセットされた二次電池の電圧値との差が大きい場合、前記電源遮断スイッチは、オフ状態となる機能を有し、
前記第1の記憶回路は、酸化物半導体膜にチャネル形成領域を有する第1のトランジスタを少なくとも有する二次電池の保護回路。 - 請求項1において、
前記第2の記憶回路は、酸化物半導体膜にチャネル形成領域を有する第2のトランジスタを少なくとも有し、
前記第2の記憶回路は、前記電源遮断スイッチのデータ保持する機能を有する二次電池の保護回路。 - 請求項1または請求項2において、
前記酸化物半導体膜は、インジウム、ガリウム、亜鉛のいずれか一を含む二次電池の保護回路。
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