JPS5834577A

JPS5834577A - Overcharge detection

Info

Publication number: JPS5834577A
Application number: JP56132587A
Authority: JP
Inventors: Yuji Sato; 優治佐藤; Motoi Kanda; 基神田; Hiroichi Niki; 仁木　博一
Original assignee: Toshiba Corp; Tokyo Shibaura Electric Co Ltd
Current assignee: Toshiba Corp
Priority date: 1981-08-26
Filing date: 1981-08-26
Publication date: 1983-03-01

Abstract

PURPOSE:To secure detection of the time of the overcharge of each battery according to the variations in charge voltage of the batteries by measuring strain developing in the surface of the case, such as an exterior can, of the battery. CONSTITUTION:Strain gages 121, 122...12n-1, 12n, respectively, are located on parts of battery exterior-cans which are the cases of a number of batteries 111, 112...11n-1 and 11n connected in series. The above strain gages are constituted from strain gages 211...21n, bridges 221...22n connected to the strain gages 211... 21n, constant-voltage power sources 231...23n which supply voltages to the bridges 221...22n, amplifying parts 241...25n which are led out of opposed vertexes of the bridges 221...22n, and displaying parts 251...24n which display the outputs of the amplifying parts 241...24n. When the battery comes to be in a overcharged state, the charging current beging to be consumed for gas generation, and the internal pressure of the battery increases. As a result, strain develops in the surface of the case, which is the exterior can of the battery, due to the above internal pressure increase.

Description

【発明の詳細な説明】重置Ｉｌは電電Ｏ外ＩＩ缶等の容器の表面に発生するひ
ずみ管調定すゐことによ）過充電を検知する方法に−す
為。DETAILED DESCRIPTION OF THE INVENTION [Detailed Description of the Invention] The superposition Il is used as a method for detecting overcharging (by adjusting strain tubes generated on the surface of containers such as electric and electric Ogai II cans).

一＊に、蓄電池は、過充電により特性の劣化。Firstly, the characteristics of storage batteries deteriorate due to overcharging.

寿命Ｏ低下、ａｉｍなどを龜友すため過充電を未然Ｋｗ
Ｉぐ必要がある。Reduced lifespan, prevents overcharging to prevent aim, etc.
I need to do it.

従来、複数個直列ＫＩ！続した電池を充電する場合に、
電電Ｏ充電状簡會知ゐ方法としてり直列に接続し九電亀
Ｏ合計した電８Ｅｔ検知し判別する方法、りい（りか０
１ンデル電池の電圧を検知し判別する方法、もしくに３
）個々Ｏ電池にそＯ電圧を検出して判別する手段管それ
ぞれ設ける方法があった。１）および２）の方法は個々
の電池の特性のバラツキにより、直列に接続した電池の
いくつかに過充電が発生しても、全体として、４Ｌ＜は
すｙデル電池が許容電圧を温良している場合かあ）。Conventionally, multiple KI! When charging a connected battery,
A simple way to know the state of charge is to connect them in series and detect and determine the total 8Et of electricity.
1 How to detect and determine the voltage of a battery, or 3
) There was a method in which each O battery was provided with a means tube for detecting and discriminating the O voltage. In methods 1) and 2), due to variations in the characteristics of individual batteries, even if some of the batteries connected in series are overcharged, overall the 4L< y Dell battery maintains the allowable voltage. ).

このために過充電の検知が逼れる欠点があった。For this reason, there was a drawback that detection of overcharging was difficult.

３）Ｄ方法は個々の電池電圧を検出する回路が必要とな
る他に電池電圧が過充電領域になっても上昇せず飽和し
てしまう電池もあり確！ＪＫ検知できないなどの問題が
あった。3) Method D requires a circuit to detect the voltage of each individual battery, and it is also possible that some batteries may reach saturation without rising even if the battery voltage reaches the overcharge range! There were problems such as not being able to detect high school girls.

本発明に、上記の欠点ｔ＃去するためになされたもので
、過充電を確実に検知し、ｔた電池個々ＤＩ４ラツ中に
よる充電電圧の違いｔ考慮しなくてもよい過充電検知方
法１ｍ供す為事ｔａ的とすり。The present invention has been made to eliminate the above-mentioned drawbacks, and is an overcharge detection method that reliably detects overcharge and does not require consideration of differences in charging voltage due to individual battery DI4. The purpose of the offer is ta.

すなわち１本発明は、直列縁続した複数個Ｏ電池Ｏそれ
ぞれＯ容器の表面にひずみｒ−ジを設置し、過充電によ
って電池内部に発生するガスの圧力によｊｌｌＦ器０Ｉ
Ｉｔ厘に発生するひずみレベルｔ＃ｌ定することｔＩ！
＃黴とする過充電検知方法に係ゐｔＯである。That is, in the present invention, a strain r-gear is installed on the surface of each O container of a plurality of O batteries O connected in series, and the jllF container O I is caused by the pressure of gas generated inside the batteries due to overcharging.
Determine the strain level t#l that occurs at the time tI!
#It is related to the overcharge detection method using mold.

以下本弛明Ｏ検知方法管図面によって説明すれば、總Ｉ
ＩＩにおいて、直列接続した複数個の電池１１１ｍ　１
１ｇ　＝−１１Ｂ−１、１１１の容器となる電池外羨缶
〇一部に夫々ひずみｒ−ゾ”＊　＊　ｔｚ＝・・・・・
・・・・鳳冨■−ｉ＊１！ｍｔ配置してなるものである
。上記ひずみｒ−ｙにｗｔｚ図に示すごとく夫々のひず
みｒ−）２１．−−１１鳳とこれに接続されたツリッゾ
部意雪鳳−・−・！２ｒ＊１及び之に給電する定電圧電
源部２３゜−一！３凰及びｆＩｊブリッジ頂点より導出
されて変化電圧を増幅する増幅Ｓ意４１・・・・・・２
４．と、その出力管表示する表示９２Ｂ、−・−２ｈと
より構成され。Below, the present method for detecting light O
In II, multiple batteries 111m 1 connected in series
1g = -11B-1, a can outside the battery that serves as a container for 111 〇 Part of each strain r-zo" * * tz =...
...Hotomi■-i*1! It is made by arranging mt. As shown in the wtz diagram, each strain r-)21. --11 Otori and the Tsurizobu Isetsuho connected to it--! 2r*1 and the constant voltage power supply unit 23°-1! 3. Amplification signal derived from the apex of the bridge and fIj and amplifying the changing voltage 41...2
4. and displays 92B, -.-2h for displaying the output tubes.

前記Ｏひずみｒ−ジは外装缶に固着されその抵抗値は過
充電以前は不変であるが、電池が過充電領域に入ると充
電電＃ｌはガス発生に費やされるようＫな）、電池内部
Ｏ圧力は上昇し、この内圧の上昇に伴りて電池外懐缶で
ある容器表面にひずみが生じる。よってこのひずみｔ検
出することによｐ過充電管未然に肪止するものである。The O strain r is fixed to the outer case and its resistance value remains unchanged before overcharging, but when the battery enters the overcharge region, the charging current is spent on gas generation (K), inside the battery. The O pressure increases, and with this increase in internal pressure, strain occurs on the surface of the container, which is the outer battery case. Therefore, by detecting this strain t, the overcharged tube can be prevented from becoming overcharged.

以上Ｏように本発明によれば電池夫々のバラツキによる
充電電圧Ｏ違いＫよ）過充電の時期の検知ｔ、遅れるこ
となく確実に、検知できる利点がある・As described above, according to the present invention, there is an advantage that the timing of overcharging can be detected reliably without delay.

[Brief explanation of the drawing]

第１ＩＩ及び第２図は本発明の詳細な説明するための図
である。１１ｔ　ｅ　ｌｈ　”’・−１１，−電池、　　１２ｔ
　、　１２ｍ・・・・・・１−鳳−・ひずみｒ−ジ、２
１！・・・・・４１１Ｍ・・・ひずみｒ−ゾ。２２ｓ−＝・２２．・・・ブリッジ部、２３１・・・・
・・２３ｎ・・・定電圧電源、２４に−・−２４，−増
幅部、　ＺＳｌ・＝　−２Ｓｎ・・・表示部。FIG. 1II and FIG. 2 are diagrams for explaining the present invention in detail. 11t e lh ”'・-11,-Battery, 12t
, 12m...1-Otori-・Strain r-ji, 2
1! ...411M...Strain r-zo. 22s-=・22.・・・Bridge part, 231...
...23n... Constant voltage power supply, 24 - -24, -amplification section, ZSl.=-2Sn... Display section.

Claims

[Claims]

When several batteries are connected in series (a strainer is installed in the battery), the internal battery voltage reaches 111K due to overcharging.
An overcharge detection method that measures the strain O level that occurs on the SOW surface due to the pressure of the gas that causes li*.