JP3221870B2 - Secondary battery with battery protection circuit - Google Patents
Secondary battery with battery protection circuitInfo
- Publication number
- JP3221870B2 JP3221870B2 JP2000005851A JP2000005851A JP3221870B2 JP 3221870 B2 JP3221870 B2 JP 3221870B2 JP 2000005851 A JP2000005851 A JP 2000005851A JP 2000005851 A JP2000005851 A JP 2000005851A JP 3221870 B2 JP3221870 B2 JP 3221870B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- secondary battery
- protection circuit
- insulating holder
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、リチウムイオン二
次電池等の二次電池に電池保護回路を設け、電池自体で
過充電や過放電等から保護する機能を備えて構成したも
ので、特に小型、扁平形の二次電池に適用できるように
した電池保護回路を備えた二次電池に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary battery, such as a lithium ion secondary battery, which is provided with a battery protection circuit and has a function of protecting the battery itself from overcharging and overdischarging. The present invention relates to a secondary battery including a battery protection circuit adapted to be applied to a small and flat secondary battery.
【０００２】[0002]
【従来の技術】二次電池は、この二次電池を使用する機
器の電池周辺回路の短絡、正負電極間の短絡、過充電や
過放電等の異常使用による電池の損傷を防止するために
さまざまの保護機能が設けられている。短絡等による過
大放電電流を阻止するＰＴＣ素子や過充電に伴う電池内
圧の異常上昇により通電回路を遮断して内圧を放出する
電流遮断弁等がそれであり、これらの保護機能は二次電
池自体が装備する機能として周知のところである。ま
た、リチウムイオン二次電池では過充電や過放電等を防
止するために電池保護回路が設けられ、この電池保護回
路は一般的に電池パックの形態として、リチウムイオン
二次電池と共に電池保護回路を形成した回路基板をパッ
クケース内に収容して一体化される。このような二次電
池と電池保護回路とをパックケース内に収容して一体化
した電池パックは、携帯電話機や携帯型コンピュータ等
の携帯機器の電池電源装置として多く用いられているこ
とは周知のところである。2. Description of the Related Art Secondary batteries are used to prevent battery damage due to abnormal use such as short-circuiting of battery peripheral circuits, short-circuiting between positive and negative electrodes, and overcharging and overdischarging of equipment using the secondary batteries. Protection function is provided. These include PTC elements that prevent excessive discharge current due to short circuits, etc., and current cutoff valves that release the internal pressure by interrupting the current-carrying circuit due to an abnormal rise in battery internal pressure due to overcharging. It is a well-known function to be equipped. In addition, a lithium ion secondary battery is provided with a battery protection circuit to prevent overcharging, overdischarging, and the like, and this battery protection circuit generally has a battery protection circuit in the form of a battery pack together with the lithium ion secondary battery. The formed circuit board is housed in a pack case and integrated. It is well-known that such a battery pack in which a secondary battery and a battery protection circuit are housed and integrated in a pack case is often used as a battery power supply device of a portable device such as a mobile phone or a portable computer. By the way.
【０００３】前記電池保護回路は、前述の過充電や過放
電の防止の他、過大電流の遮断、電池温度モニター等の
機能を備えることができ、これを二次電池自体と一体に
取り付けることができれば、電池パックを構成すること
なく電池保護回路を備えた二次電池を形成することがで
き、汎用性の高い二次電池を提供することができる。二
次電池に保護回路を一体に構成した二次電池は、特開平
８−３１４６０号公報、特開平１１−２６０２９号公報
等に開示されたものが知られている。[0003] The battery protection circuit can have functions of preventing overcharge and overdischarge, shutting off excessive current, monitoring the battery temperature, and the like, and can be integrated with the secondary battery itself. If possible, a secondary battery having a battery protection circuit can be formed without forming a battery pack, and a highly versatile secondary battery can be provided. As a secondary battery in which a protection circuit is integrated with a secondary battery, those disclosed in JP-A-8-31460, JP-A-11-26029 and the like are known.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、二次電
池に電池保護回路を一体化させるとき、二次電池の形態
を損なうことなく、また外形寸法の増大を抑えて構成す
ることが課題であり、特に小型扁平形の二次電池の場合
ではこれに電池保護回路を一体化するには、配置スペー
スが少なく外形寸法の増加を抑えて電池保護回路を一体
化することが困難であった。However, when a battery protection circuit is integrated with a secondary battery, it is a problem to configure the secondary battery without impairing the form of the secondary battery and suppressing an increase in external dimensions. In particular, in the case of a small flat secondary battery, in order to integrate the battery protection circuit into the battery, it is difficult to integrate the battery protection circuit while suppressing the increase in external dimensions due to a small arrangement space.
【０００５】また、小型扁平形の二次電池では、前述の
ＰＴＣ素子や電流遮断弁を設けるスペースが少なく、こ
れらを設けると発電要素の減少に伴う電池容量の低下を
まねく問題があり、ＰＴＣ素子は二次電池の外に電池保
護回路の一部として配設し、電流遮断弁はその機能を電
池保護回路に委ねる必要がある。しかし、ＰＴＣ素子を
電池保護回路の一部として配設すると、電池保護回路を
二次電池に一体化した時の体積の増加は避けられず、外
形寸法の増大を抑える目的は達成し難い。また、通常の
電池保護回路では、回路に設定された過充電保護電圧を
越えた過充電領域で発生するガスに伴う電池内圧により
弁体を破断し、通電を遮断する電流遮断弁の機能を担う
ことができなかった。[0005] In addition, in the case of a small flat secondary battery, there is little space for providing the above-mentioned PTC element and the current cutoff valve, and when these are provided, there is a problem that the battery capacity is reduced due to a decrease in the number of power generation elements. Is provided outside the secondary battery as part of the battery protection circuit, and the function of the current cutoff valve must be delegated to the battery protection circuit. However, when the PTC element is provided as a part of the battery protection circuit, an increase in volume when the battery protection circuit is integrated with the secondary battery is unavoidable, and it is difficult to achieve the purpose of suppressing an increase in external dimensions. Further, in a normal battery protection circuit, the valve body is broken by a battery internal pressure accompanying gas generated in an overcharge region exceeding an overcharge protection voltage set in the circuit, and functions as a current cutoff valve that cuts off current. I couldn't do that.
【０００６】本発明が目的とするところは、扁平形二次
電池に適用できるコンパクトな構成により、二次電池の
外形寸法の増加を抑えて構成され、電池保護回路の機能
向上によりＰＴＣ素子や電流遮断弁を設けることなく回
路構成により電池保護を可能とし、電池パックの形態を
不要にして電池単体で使用できる電池保護回路を備えた
電池を提供することにある。An object of the present invention is to provide a compact structure applicable to a flat type secondary battery so as to suppress an increase in the external dimensions of the secondary battery, and to improve the function of a battery protection circuit to provide a PTC element and a current supply. It is an object of the present invention to provide a battery provided with a battery protection circuit that enables battery protection by a circuit configuration without providing a shut-off valve, and that does not require a battery pack and can be used alone.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
の本願の第１発明は、有底筒状の容器内に発電要素を収
容した電池缶と、この電池缶の開口端を封口する封口部
の中央に前記電池缶と絶縁して設けられた突出端子と
に、正極または負極がそれぞれ設定されてなる二次電池
に、この二次電池を過充電、過放電等から保護する電池
保護回路が一体的に設けられてなる電池保護回路を備え
た二次電池であって、電池缶の封口部側に前記電池保護
回路及び複数の入出力端子を形成した回路基板が配設さ
れ、前記突出端子と電池缶とがそれぞれ電池保護回路を
介して前記入出力端子に接続され、電池缶の封口部側
に、回路基板上に形成された入出力端子部分に開口部を
形成して回路基板上を覆うと共に電池缶の底面側に向け
て延出する一対の延出部の先端に連結部が形成された上
部絶縁ホルダを配し、電池缶の底面側に、電池缶の底面
を覆うと共に電池缶の封口部側に向けて延出する一対の
延出部の先端に連結部が形成された下部絶縁ホルダを配
して、上部絶縁ホルダ及び下部絶縁ホルダをそれぞれの
連結部間で連結させ、上部絶縁ホルダ及び下部絶縁ホル
ダの側周部を含む二次電池の側周面が絶縁シートで被覆
されてなることを特徴とする。Means for Solving the Problems A first invention of the present application for achieving the above object is a battery can in which a power generating element is housed in a bottomed cylindrical container, and a closure for closing an open end of the battery can. A battery protection circuit that protects the secondary battery from overcharge, overdischarge, etc., to a secondary battery in which a positive electrode or a negative electrode is respectively set to a protruding terminal provided insulated from the battery can at the center of the part. Is a secondary battery provided with a battery protection circuit integrally provided, wherein a circuit board on which the battery protection circuit and a plurality of input / output terminals are formed is disposed on a sealing portion side of a battery can, and the protrusion is provided. A terminal and a battery can are respectively connected to the input / output terminal via a battery protection circuit, and the battery can is sealed.
In addition, an opening is formed in the input / output terminal part formed on the circuit board.
To cover the circuit board and to the bottom of the battery can
A connecting portion is formed at the tip of a pair of extending portions extending
Place the insulated holder on the bottom of the battery can.
And a pair of
Place a lower insulating holder with a connecting part at the end of the extension.
The upper insulating holder and the lower insulating holder
Connect the connecting parts, and connect the upper insulating holder and lower insulating holder.
The side peripheral surface of the secondary battery including the side peripheral portion of the secondary battery is covered with an insulating sheet.
【０００８】上記第１発明によれば、二次電池の正負両
極は電池保護回路を介して回路基板に形成された複数の
入出力端子に接続され、その周囲が入出力端子に対応す
る位置に開口部を設けた上部絶縁ホルダと下部絶縁ホル
ダ及び絶縁シートにより絶縁被覆される。二次電池の封
口部上に回路基板を配設できるスペースを設けるだけで
二次電池の形態を損なうことなく電池保護回路を備えた
二次電池を構成することができる。According to the first aspect, the positive and negative electrodes of the secondary battery are connected to the plurality of input / output terminals formed on the circuit board via the battery protection circuit, and the periphery thereof is at a position corresponding to the input / output terminals. It is insulated and covered by an upper insulating holder provided with an opening, a lower insulating holder, and an insulating sheet. A secondary battery provided with a battery protection circuit can be configured without impairing the form of the secondary battery simply by providing a space on the sealing portion of the secondary battery on which the circuit board can be disposed.
【０００９】また、本願の第２発明は、有底筒状の容器
内に発電要素を収容した電池缶と、この電池缶の開口端
を封口する封口部の中央に前記電池缶と絶縁して設けら
れた突出端子とに、正極または負極がそれぞれ設定され
てなる二次電池に、この二次電池を過充電、過放電等か
ら保護する電池保護回路が一体的に設けられてなる二次
電池であって、前記電池缶の封口部側に、前記突出端子
に接合した接続板と、電池保護回路が形成されると共に
複数の入出力端子が形成された回路基板と、この回路基
板の座面を形成して二次電池との間を離隔するスペーサ
とが配設され、前記電池缶に接合されたリード板と前記
接続板とを、それぞれ前記回路基板の所定位置に接続す
ることにより、二次電池と回路基板とが一体化されると
共に、二次電池と電池保護回路とが電気的接続されて二
次電池の正極及び負極が電池保護回路を介して前記入出
力端子に接続され、電池缶の封口部側に、回路基板上に
形成された入出力端子部分に開口部を形成して回路基板
上を覆うと共に電池缶の底面側に向けて延出する一対の
延出部の先端に連結部が形成された上部絶縁ホルダを配
し、電池缶の底面側に、電池缶の底面を覆うと共に電池
缶の封口部側に向けて延出する一対の延出部の先端に連
結部が形成された下部絶縁ホルダを配して、上部絶縁ホ
ルダ及び下部絶縁ホルダをそれぞれの連結部間で連結さ
せ、上部絶縁ホルダ及び下部絶縁ホルダの側周部を含む
二次電池の側周面を絶縁シートで被覆して構成されてな
ることを特徴とする。In a second aspect of the present invention, a battery can in which a power generating element is housed in a bottomed cylindrical container, and the battery can is insulated at the center of a sealing portion for sealing an open end of the battery can. A secondary battery in which a protruding terminal provided and a positive electrode or a negative electrode are respectively set, and a battery protection circuit for protecting the secondary battery from overcharge, overdischarge, etc., is provided integrally. A connection board joined to the protruding terminal, a circuit board on which a battery protection circuit is formed and a plurality of input / output terminals are formed, and a seating surface of the circuit board. And a spacer for separating the secondary battery from the secondary battery, and connecting the lead plate and the connection plate joined to the battery can to predetermined positions on the circuit board, respectively. The secondary battery and the circuit board are integrated, and the secondary battery and The battery protection circuit is electrically connected, the positive and negative electrodes of the secondary battery are connected to the input / output terminals via the battery protection circuit, and the input / output terminals formed on the circuit board at the sealing side of the battery can. An upper insulating holder having a connecting portion formed at the tip of a pair of extending portions that forms an opening in the portion and covers the circuit board and extends toward the bottom side of the battery can is provided. A lower insulating holder having a connecting portion formed at the tip of a pair of extending portions that covers the bottom surface of the battery can and extends toward the sealing portion side of the battery can. It is characterized in that the holder is connected between the respective connecting portions, and the side peripheral surface of the secondary battery including the side peripheral portions of the upper insulating holder and the lower insulating holder is covered with an insulating sheet.
【００１０】上記構成によれば、二次電池上にはスペー
サを介して回路基板が配置され、接続板及びリード板に
よって二次電池は回路基板上に構成された電池保護回路
に接続されるので、二次電池が電池保護回路を通じて回
路基板上に形成された入出力端子に接続された電池保護
回路付きの二次電池に形成される。これを上部絶縁ホル
ダ、下部絶縁ホルダ及び絶縁シートによって入出力端子
を除く全ての部分を絶縁被覆することにより、入出力端
子だけが外部に露出する電池保護回路を備えた二次電池
がコンパクトに構成される。According to the above configuration, the circuit board is disposed on the secondary battery via the spacer, and the secondary battery is connected to the battery protection circuit formed on the circuit board by the connection plate and the lead plate. The secondary battery is formed in the secondary battery with the battery protection circuit connected to the input / output terminal formed on the circuit board through the battery protection circuit. By covering the entire area except the input / output terminals with the upper insulating holder, lower insulating holder, and insulating sheet, the secondary battery is compact with a battery protection circuit that exposes only the input / output terminals to the outside. Is done.
【００１１】上記構成において、二次電池は、長円形断
面の扁平形状に形成されたものに適用すると好適であ
り、小型薄型化を指向する携帯機器の電池電源として適
用することができる。In the above configuration, the secondary battery is preferably applied to a battery having a flat shape with an oblong cross section, and can be applied as a battery power source for a portable device which is intended to be small and thin.
【００１２】また、回路基板の封口部側に実装された電
子部品は、二次電池の封口部上に形成された凹部に対応
する位置に配置することにより、二次電池から突出する
量を少なくして電池保護回路を備えることができる。Further, the electronic components mounted on the sealing portion side of the circuit board are arranged at positions corresponding to the concave portions formed on the sealing portion of the secondary battery, so that the amount of protrusion from the secondary battery is reduced. Thus, a battery protection circuit can be provided.
【００１３】また、スペーサに、二次電池に対する位置
決め部と、回路基板上に装着された電子部品に対応する
位置に開口部とを形成することにより、二次電池上への
装着時の位置決めがなされ、回路基板の封口部側に実装
された電子部品を開口部に収めて少ないスペースに電池
保護回路を収容することができる。Further, by forming the positioning portion for the secondary battery and the opening at a position corresponding to the electronic component mounted on the circuit board in the spacer, positioning at the time of mounting on the secondary battery can be achieved. The battery protection circuit can be accommodated in a small space by housing the electronic component mounted on the sealing portion side of the circuit board in the opening.
【００１４】上記位置決め部は、突出端子の両側に平行
して配設される位置決め突起に形成することにより、位
置決めと同時に電池缶と接続板との間の絶縁性を強化す
ることができる。By forming the positioning portion on a positioning projection disposed in parallel with both sides of the protruding terminal, the insulation between the battery can and the connection plate can be strengthened simultaneously with the positioning.
【００１５】また、回路基板上に設けられた複数の入出
力端子は非対称に配置することにより、逆装填の防止を
図ることができる。Further, by arranging the plurality of input / output terminals provided on the circuit board asymmetrically, reverse loading can be prevented.
【００１６】また、上部絶縁ホルダの側周部に、絶縁シ
ート被覆用の段差を形成することにより、絶縁シートの
貼着時の位置決めがなされる。Further, by forming a step for covering the insulating sheet on the side peripheral portion of the upper insulating holder, positioning at the time of attaching the insulating sheet is performed.
【００１７】また、上部絶縁ホルダ及び下部絶縁ホルダ
に、扁平形状に形成された二次電池の短側面と、長側面
の一部とを覆う被覆部を形成することにより、二次電池
と電池保護回路とを確実に一体化することができ、上下
の絶縁ホルダが二次電池の全体を被覆しないため、充放
電の繰り返し等によって電池缶に膨らみが生じたときに
も外径寸法に変化を生じさせない。Further, by forming a covering portion on the upper insulating holder and the lower insulating holder so as to cover the short side and a part of the long side of the flat secondary battery, the secondary battery and the battery are protected. The circuit can be integrated reliably, and the upper and lower insulating holders do not cover the entire secondary battery, so even when the battery can swells due to repeated charging and discharging, the outer diameter changes. Do not let.
【００１８】また、上部絶縁ホルダ及び下部絶縁ホルダ
は、それぞれの連結部を重合及び／又は係合させること
によって連結すると、連結が確実になされる。Further, when the upper insulating holder and the lower insulating holder are connected by overlapping and / or engaging the respective connecting portions, the connection is reliably performed.
【００１９】また、リード板は、その一端が電池缶の底
面に接合され、扁平形状の電池缶の短側面に沿って封口
部側に延出することにより、扁平形の二次電池の厚さを
増加させない。The lead plate has one end joined to the bottom surface of the battery can and extends along the short side surface of the flat battery can toward the sealing portion, thereby reducing the thickness of the flat secondary battery. Not increase.
【００２０】また、上部絶縁ホルダ及び下部絶縁ホルダ
の内面側に、リード板を収容する凹部または開放部を形
成することにより、リード板の位置保持及び幅サイズの
増加を抑えることができる。Further, by forming a concave portion or an open portion for accommodating the lead plate on the inner surface side of the upper insulating holder and the lower insulating holder, it is possible to suppress the position holding of the lead plate and an increase in the width size.
【００２１】また、電池保護回路は、過充電や過放電等
の状態を検出して充放電回路を遮断する主制御回路と、
この主制御回路の異常時に充放電回路を遮断する副制御
回路とを備えた二重保護回路が形成されてなり、回路基
板上の回路パターンは、主副各制御回路それぞれの接地
部位が分離するように形成されてなり、電池缶に一端が
接合された一対のリード板はそれぞれ主制御回路と副制
御回路との接地部位に接続され、その間は直接接続され
ないので、接地回路に閉ループが形成されず、閉ループ
によるノイズの影響を軽減することができる。The battery protection circuit includes a main control circuit that detects a state such as overcharge or overdischarge and shuts off the charge / discharge circuit.
A double protection circuit including a sub-control circuit that shuts off the charge / discharge circuit when the main control circuit is abnormal is formed, and the circuit pattern on the circuit board is separated from the ground portion of each of the main and sub-control circuits. The pair of lead plates, one end of which is joined to the battery can, are connected to the ground portions of the main control circuit and the sub control circuit, respectively, and are not directly connected between them, so that a closed loop is formed in the ground circuit. Instead, the effect of noise due to the closed loop can be reduced.
【００２２】[0022]
【発明の実施の形態】以下、添付図面を参照して本発明
の実施形態について説明し、本発明の理解に供する。
尚、以下に示す実施形態は本発明を具体化した一例であ
って、本発明の技術的範囲を限定するものではない。Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The embodiment described below is an example embodying the present invention, and does not limit the technical scope of the present invention.
【００２３】以下に示す実施形態は、図３に示すような
扁平形のリチウムイオン二次電池に、過充電、過放電等
から二次電池を保護する電池保護回路を構成した回路基
板を一体に取り付け、図１に示すように二次電池の形態
を損なうことなく電池保護回路を備えた二次電池に構成
したものである。In the embodiment described below, a flat lithium ion secondary battery as shown in FIG. 3 is integrated with a circuit board constituting a battery protection circuit for protecting the secondary battery from overcharge, overdischarge, and the like. As shown in FIG. 1, the secondary battery is provided with a battery protection circuit without damaging the form of the secondary battery.
【００２４】図１において、本実施形態に係る電池保護
回路を備えた二次電池は、その一端面にプラス端子４、
マイナス端子５及び温度検出端子６を外部に露出させ、
この端子部分以外は全て上部絶縁ホルダ１３、下部絶縁
ホルダ１４及び絶縁ラベル７で覆われた中に、二次電池
１と電池保護回路を構成する回路基板９とが一体に組み
込まれている。In FIG. 1, a secondary battery provided with a battery protection circuit according to the present embodiment has a plus terminal 4 on one end surface thereof.
Exposing the minus terminal 5 and the temperature detection terminal 6 to the outside,
The secondary battery 1 and a circuit board 9 that constitutes a battery protection circuit are integrated into a single unit, while all parts other than the terminal portions are covered with an upper insulating holder 13, a lower insulating holder 14, and an insulating label 7.
【００２５】図２は、その内部構造を分解して示すもの
で、リチウムイオン二次電池として構成された二次電池
１の封口部側に、この二次電池１の正極入出力端子（突
出端子）２５に接合される接続板１１、二次電池１上に
配設されて回路基板９の座面を提供するスペーサ１２、
電池保護回路を構成すると共にプラス端子４、マイナス
端子５及び温度検出端子６を形成した回路基板９、上部
側を絶縁被覆する上部絶縁ホルダ１３が配設され、二次
電池１の底部側に、二次電池１の底面に基部１０ｂが接
合されてリード部１０ａを封口部側に延出する一対のリ
ード板１０、１０、下部側を絶縁被覆する下部絶縁ホル
ダ１４が配設されている。FIG. 2 is an exploded view showing the internal structure of the secondary battery 1. A positive electrode input / output terminal (protruding terminal) of the secondary battery 1 A) a connection plate 11 joined to 25), a spacer 12 provided on the secondary battery 1 to provide a seating surface for the circuit board 9,
A circuit board 9, which constitutes a battery protection circuit and has a positive terminal 4, a negative terminal 5, and a temperature detecting terminal 6 formed thereon, and an upper insulating holder 13 that insulates and covers the upper side, are provided on the bottom side of the secondary battery 1. A base 10 b is joined to the bottom surface of the secondary battery 1, and a pair of lead plates 10, 10 that extend the lead 10 a to the sealing portion side and a lower insulating holder 14 that insulates the lower side are provided.
【００２６】二次電池１は、図３に示すように、長円形
断面の有底筒状に形成された電池缶３１内に発電要素３
３を収容し、電池缶３１の開口端にガスケット３５、封
口板３２及び電極キャップ３４を備えた封口部を配し、
開口端を内側に折り曲げるカシメ加工により封口部を固
定することにより電池缶３１の開口端を封口した小型、
扁平形に形成されている。発電要素３３を構成する正極
板はガスケット３５によって電池缶３１と絶縁された電
極キャップ３４に接続され、その中央の突出部は二次電
池１の正極入出力端子２５となる。また、発電要素３３
を構成する負極板は電池缶３１に接続されて、電池缶３
１は二次電池１の負極入出力端子となる。As shown in FIG. 3, the secondary battery 1 includes a power generating element 3 in a battery can 31 formed in a bottomed cylindrical shape having an oval cross section.
3 and a sealing portion provided with a gasket 35, a sealing plate 32, and an electrode cap 34 at the open end of the battery can 31.
A small-sized, closed end of the battery can 31 by fixing the sealing portion by caulking to bend the opening end inward.
It is formed in a flat shape. The positive electrode plate constituting the power generating element 33 is connected to an electrode cap 34 insulated from the battery can 31 by a gasket 35, and the central protrusion serves as the positive electrode input / output terminal 25 of the secondary battery 1. The power generation element 33
Is connected to the battery can 31 and the battery can 3
Reference numeral 1 denotes a negative electrode input / output terminal of the secondary battery 1.
【００２７】この二次電池１の正極入出力端子２５に、
Ｌの字状に形成された接続板１１の基部１１ｂが接合さ
れる。また、電池缶３１の底面には、一対のリード板１
０、１０それぞれの基部１０ｂが接合され、一対のリー
ド部１０ａ、１０ａは電池缶３１の側面に沿って封口部
側に延出される。The positive electrode input / output terminal 25 of the secondary battery 1
The base 11b of the connection plate 11 formed in an L shape is joined. A pair of lead plates 1 is provided on the bottom surface of the battery can 31.
The base portions 10b of the 0 and 10 are joined, and the pair of lead portions 10a and 10a extend toward the sealing portion along the side surface of the battery can 31.
【００２８】また、二次電池１の封口部側には、図４に
示すように形成されたスペーサ１２が取り付けられる。
図４（ｂ）に示すように、スペーサ１２の下面（二次電
池１側）には、長円形に形成された正極入出力端子２５
の長手方向側面に当接する一対の位置決め部３７が形成
されており、これを正極入出力端子２５に嵌合するよう
に封口部上に配置することにより、スペーサ１２は二次
電池１上に位置決め嵌合され、負極である電池缶３１と
の間の絶縁性が強化される。Further, a spacer 12 formed as shown in FIG. 4 is attached to the sealing portion side of the secondary battery 1.
As shown in FIG. 4B, on the lower surface (the secondary battery 1 side) of the spacer 12, a positive electrode input / output terminal 25 formed in an oval shape is provided.
A pair of positioning portions 37 are formed in contact with the side surfaces in the longitudinal direction, and are arranged on the sealing portion so as to be fitted to the positive electrode input / output terminals 25, whereby the spacer 12 is positioned on the secondary battery 1. The insulation between the battery can 31 and the negative electrode is strengthened.
【００２９】一対の位置決め部３７の間に開口する接続
板通し穴３８は、正極入出力端子２５に接合された接続
板１１のリード部１１ａを上面に貫通させる。このスペ
ーサ１２により二次電池１と絶縁された座面が形成さ
れ、その座面には回路基板９の封口部側に実装された電
子部品を収容する開口部３６ａ、３６ｂが形成されてい
る。この上に回路基板９を配置すると、封口部側に実装
された電子部品は前記開口部３６ａ、３６ｂ内に収容さ
れるので、回路基板９はその基板の厚さとスペーサ１２
の厚さとを加えた高さだけで二次電池１上に積層された
状態となり、電池保護回路を設けることによる高さの増
加が抑制される。The connection plate through hole 38 opening between the pair of positioning portions 37 allows the lead portion 11a of the connection plate 11 joined to the positive electrode input / output terminal 25 to penetrate the upper surface. The spacer 12 forms a seat surface insulated from the secondary battery 1, and the seat surface has openings 36 a and 36 b for housing electronic components mounted on the sealing portion side of the circuit board 9. When the circuit board 9 is disposed thereon, the electronic components mounted on the sealing portion side are accommodated in the openings 36a and 36b.
The thickness is added to the secondary battery 1 only at the height obtained by adding the thickness of the battery, and the increase in height due to the provision of the battery protection circuit is suppressed.
【００３０】図５は、回路基板９の表裏両面に形成され
た回路パターンと、これに装着される電子部品を透視図
的に記載したもので、基板上に図６に示す電池保護回路
と入出力端子とが構成されている。図５に示すように、
回路基板９の裏面側（ｂ）にはＩＣ部品２１、２２と、
チップ部品２６とが実装された電池保護回路が構成さ
れ、表面側（ａ）にはプラス端子４、マイナス端子５及
び温度検出端子６と、接続板１１を接続するための接続
板用導体パターン１５及びリード板１０を接続するため
のリード板用導体パターン１６ａ、１６ｂとが形成され
ている。この両面に形成された回路パターンは要所でス
ルーホール３０によって接続されている。この回路基板
９に形成されたリード通し穴２０から接続板１１のリー
ド部１１ａを通し、リード部１１ａを接続板用導体パタ
ーン１５上に折り曲げてハンダ付けする。また、回路基
板９の両端に形成されたリード板通し凹部２９、２９に
一対のリード板１０それぞれのリード部１０ａ、１０ａ
を通し、リード板用導体パターン１６ａ、１６ｂ上に折
り曲げてハンダ付けする。この接続板１１及びリード板
１０がハンダ付けされることにより、回路基板９はスペ
ーサ１２上に固定される。FIG. 5 is a perspective view showing circuit patterns formed on both front and back surfaces of the circuit board 9 and electronic components mounted thereon. The battery protection circuit shown in FIG. And an output terminal. As shown in FIG.
On the back side (b) of the circuit board 9, IC components 21 and 22 are provided.
A battery protection circuit on which the chip component 26 is mounted is formed. On the front side (a), the plus terminal 4, the minus terminal 5, the temperature detection terminal 6, and the connection plate conductor pattern 15 for connecting the connection plate 11. And lead plate conductor patterns 16a and 16b for connecting the lead plate 10. The circuit patterns formed on both sides are connected by through holes 30 at important points. The lead portion 11a of the connection plate 11 is passed through the lead through hole 20 formed in the circuit board 9, and the lead portion 11a is bent onto the connection plate conductor pattern 15 and soldered. Further, the lead portions 10a, 10a of the pair of lead plates 10 are respectively inserted into the lead plate passing recesses 29, 29 formed at both ends of the circuit board 9.
To bend and solder on the lead plate conductor patterns 16a and 16b. The circuit board 9 is fixed on the spacer 12 by soldering the connection plate 11 and the lead plate 10.
【００３１】図６に示す電池保護回路は、二次電池１を
過充電、過放電及び過電流から保護する主制御回路ＩＣ
２１を備え、過充電、過放電及び過電流の状態の電圧が
検出されたとき、ＩＣ内に組み込まれたスイッチング素
子をオフ状態に制御し、ヒステリシス動作により所定の
解除電圧が検出されるまでオフ状態を保持し、二次電池
１の入出力回路を遮断して二次電池１を過充電、過放電
及び過電流から防止する。また、過充電による入出力回
路の遮断時に放電方向には通電を可能とし、過放電によ
る入出力回路の遮断時に充電方向には通電を可能とする
制御がなされる。この主制御回路ＩＣ２２に加えて、二
次電池１を過充電から保護する副制御回路ＩＣ２１が設
けられている。副制御回路ＩＣ２１は、常時はＩＣ内に
組み込まれたスイッチング素子をオン状態に制御して入
出力回路を導通状態に保ち、主制御回路ＩＣ２２の動作
異常によって過充電防止の動作がなされなかったとき、
過充電状態の進行を検出してスイッチング素子をオフ状
態に制御して入出力回路を遮断し、ヒステリシス動作に
より所定の解除電圧が検出されるまでオフ状態を保持
し、二次電池１が過充電の進行によって破損することを
防止する。この構成によって、二次電池１は過充電から
二重に保護されることになり、特に過充電によって著し
い損傷を受ける二次電池１を電池保護回路によって保護
することができる。従って、従来は電池を保護するため
に電池内に設けられていた電流遮断弁やＰＴＣ（Ｐｏｓ
ｉｔｉｖｅ Ｔｅｍｐｅｒａｔｕｒｅ Ｃｏｅｆｆｉｃ
ｉｅｎｔ）を廃止することも可能となり、本実施形態に
適用したような小型化、薄型化された二次電池１の場合
に好適な手段となる。つまり、小型あるいは薄型の電池
では電流遮断弁やＰＴＣを設けるスペースは得難く、こ
れらを設けることにより発電要素となる正負極板の体積
が縮小され、電池容量の減少により電池性能を低下させ
ざるを得ない状態となる問題が解消される。また、ＰＴ
Ｃを電池保護回路の一部として構成すると、電池保護回
路の占有スペースが増して小型化に支障が生じるが、本
構成の電池保護回路によってＰＴＣのない電池保護回路
を構成することができる。The battery protection circuit shown in FIG. 6 is a main control circuit IC for protecting the secondary battery 1 from overcharge, overdischarge and overcurrent.
When a voltage in an overcharge, overdischarge and overcurrent state is detected, the switching element incorporated in the IC is controlled to an off state, and is turned off until a predetermined release voltage is detected by a hysteresis operation. The state is maintained, and the input / output circuit of the secondary battery 1 is shut off to prevent the secondary battery 1 from being overcharged, overdischarged, and overcurrent. Further, control is performed such that energization is enabled in the discharging direction when the input / output circuit is interrupted due to overcharging, and energization is enabled in the charging direction when the input / output circuit is interrupted due to overdischarging. In addition to the main control circuit IC22, a sub-control circuit IC21 for protecting the secondary battery 1 from overcharge is provided. The sub-control circuit IC21 normally controls the switching element incorporated in the IC to be in an on state to keep the input / output circuit in a conductive state, and when the operation of preventing overcharge is not performed due to an abnormal operation of the main control circuit IC22. ,
The progress of the overcharge state is detected, the switching element is controlled to the off state, the input / output circuit is cut off, the off state is maintained until a predetermined release voltage is detected by the hysteresis operation, and the secondary battery 1 is overcharged. To prevent damage due to the progress of the work. With this configuration, the secondary battery 1 is doubly protected from overcharge. In particular, the secondary battery 1 that is significantly damaged by overcharge can be protected by the battery protection circuit. Therefore, a current cutoff valve or a PTC (Pos) conventionally provided in the battery to protect the battery.
active Temperature Coeffic
i) can be eliminated, which is a suitable means in the case of the small and thin secondary battery 1 applied to the present embodiment. In other words, it is difficult to obtain a space for providing a current cutoff valve and a PTC in a small or thin battery, and by providing these, the volume of the positive and negative electrodes serving as power generation elements is reduced, and the battery performance is reduced due to a reduction in battery capacity. The problem of being unable to obtain is eliminated. Also, PT
If C is configured as a part of the battery protection circuit, the space occupied by the battery protection circuit increases, which hinders miniaturization. However, the battery protection circuit of this configuration can configure a battery protection circuit without PTC.
【００３２】この電池保護回路が形成された回路基板９
において、一対のリード板１０、１０の一方が接続され
るリード板用導体パターン１６ａからスルーホール３０
を通じて接続された主接地パターン１９と、他方のリー
ド板１０が接続されるリード板用導体パターン１６ｂか
らスルーホール３０を通じて接続された副接地パターン
１８とは、図５（ｂ）に示すように、直接的には接続さ
れていない。この回路パターンの構成により、電池缶３
１に基部１０ｂが接合された一対のリード板１０が回路
基板９上の導体パターンによって連結される閉回路の形
成が避けられる。閉回路の形成は、適用した機器からの
ノイズ等の影響を受けやすくなるが、上記閉回路が形成
されない構成によりノイズ等による誤動作を防止するこ
とができる。The circuit board 9 on which the battery protection circuit is formed
In the above, the conductor pattern 16a for the lead plate to which one of the pair of lead plates 10
As shown in FIG. 5B, the main ground pattern 19 connected through the through hole 30 and the sub ground pattern 18 connected through the through hole 30 from the lead plate conductor pattern 16b to which the other lead plate 10 is connected. Not directly connected. With the configuration of this circuit pattern, the battery can 3
The formation of a closed circuit in which the pair of lead plates 10 each having the base 10b joined to the base 1 by a conductor pattern on the circuit board 9 is avoided. Although the formation of a closed circuit is easily affected by noise or the like from the applied device, a malfunction due to noise or the like can be prevented by the configuration in which the closed circuit is not formed.
【００３３】図５（ａ）に示すように、回路基板９の表
面側に形成されたプラス端子用導体パターン４ａ上には
プラス端子４、マイナス端子用導体パターン５ａ上には
マイナス端子５、温度検出端子用導体パターン６ａ上に
は温度検出端子６が接合される。これらの端子は、銅ニ
ッケル合金の板材もしくはこの銅ニッケル合金の板材と
ステンレス鋼とのクラッド材等を用いることにより、導
電性、接合性、耐蝕性に優れたものとなる。また、端子
として板材を接合することなく、各導体パターンに金メ
ッキを施してそのまま端子として利用することもでき
る。As shown in FIG. 5A, the plus terminal 4 is formed on the plus terminal conductor pattern 4a formed on the front side of the circuit board 9, and the minus terminal 5 is formed on the minus terminal conductor pattern 5a. The temperature detection terminal 6 is joined onto the detection terminal conductor pattern 6a. By using a copper-nickel alloy plate or a clad material of the copper-nickel alloy and stainless steel, these terminals are excellent in conductivity, bonding property, and corrosion resistance. Also, each conductor pattern can be plated with gold and used as a terminal without joining a plate material as a terminal.
【００３４】上記のように二次電池１に回路基板９を取
り付けた後、図２に示したように、回路基板９上には上
部絶縁ホルダ１３、二次電池１の底面には下部絶縁ホル
ダ１４が配置され、この上部絶縁板１３及び下部絶縁ホ
ルダ１４の周囲を含む全側周面に絶縁ラベル７が被覆さ
れ、図１に示すような形態の電池保護回路を備えた二次
電池に完成される。After attaching the circuit board 9 to the secondary battery 1 as described above, as shown in FIG. 2, the upper insulating holder 13 is provided on the circuit board 9 and the lower insulating holder 13 is provided on the bottom of the secondary battery 1. 14 are arranged, and the entire peripheral surface including the periphery of the upper insulating plate 13 and the lower insulating holder 14 is covered with an insulating label 7 to complete a secondary battery having a battery protection circuit having a form as shown in FIG. Is done.
【００３５】前記上部絶縁ホルダ１３は、図２に示すよ
うに、回路基板９に設けられたプラス端子４に対応する
位置にプラス端子窓４ｃ、マイナス端子５に対応する位
置にマイナス端子窓５ｃ、温度検出端子６に対応する位
置に温度検出端子窓６ｃがそれぞれ開口し、周囲に前記
絶縁ラベル７の端辺を位置決めする段差部４３が形成さ
れている。また、前記上部絶縁ホルダ１３及び下部絶縁
ホルダ１４には、図２に示すように、その内面側にリー
ド板１０を収容するリード溝４１が形成されている。As shown in FIG. 2, the upper insulating holder 13 has a plus terminal window 4c at a position corresponding to the plus terminal 4 provided on the circuit board 9, a minus terminal window 5c at a position corresponding to the minus terminal 5, and Temperature detection terminal windows 6c are respectively opened at positions corresponding to the temperature detection terminals 6, and step portions 43 for positioning the edges of the insulating label 7 are formed around the temperature detection terminal windows 6c. As shown in FIG. 2, a lead groove 41 for accommodating the lead plate 10 is formed in the upper insulating holder 13 and the lower insulating holder 14, as shown in FIG.
【００３６】また、上部絶縁ホルダ１３及び下部絶縁ホ
ルダ１４は、図７、図８に示すように、リード板１０に
対応する位置を開放して、上部絶縁ホルダ１３及び下部
絶縁ホルダ１４それぞれの延出部１３ａ、１４ａを２分
割した構造とすることにより、上部絶縁ホルダ１３及び
下部絶縁ホルダ１４の幅寸法を削減することができ、小
型化を向上させることができる。また、それぞれの延出
部１３ａ、１４ａで衝き合わされる先端部位には、互い
に嵌まり合う連結部１３ｂ、１４ｂを設けると、上部絶
縁ホルダ１３と下部絶縁ホルダ１４との連結が確実にな
される。更に、連結部１３ｂ、１４ｂに互いに嵌合する
凸部４８と開口部４９とを設けて上部絶縁ホルダ１３と
下部絶縁ホルダ１４とを係合させるように構成すると、
上部絶縁ホルダ１３と下部絶縁ホルダ１４との間の連結
がより確実となる。As shown in FIGS. 7 and 8, the positions of the upper insulating holder 13 and the lower insulating holder 14 corresponding to the lead plate 10 are opened, and the extension of the upper insulating holder 13 and the lower insulating holder 14 is performed. By forming the protrusions 13a and 14a into two parts, the width of the upper insulating holder 13 and the lower insulating holder 14 can be reduced, and the size can be reduced. Further, when connecting portions 13b and 14b that fit each other are provided at the tip portions where the extending portions 13a and 14a abut, the connection between the upper insulating holder 13 and the lower insulating holder 14 is ensured. Further, when the connecting portions 13b and 14b are provided with a convex portion 48 and an opening portion 49 which are fitted to each other, and the upper insulating holder 13 and the lower insulating holder 14 are configured to be engaged with each other,
The connection between the upper insulating holder 13 and the lower insulating holder 14 is more reliable.
【００３７】また、上部絶縁ホルダ１３及び下部絶縁ホ
ルダ１４には、図２に示すように、二次電池１の長側面
の上部、下部を覆う被覆部４４を形成すると、二次電池
１に対する嵌合が確実となり、絶縁ラベル７の巻回が容
易となる。この被覆部４４の形成は、図７及び図８に示
す構成においても設けることができ、二次電池１の側面
全体を覆うことがないので電池缶３１に膨張の余地が確
保され、膨張が生じたときにも全体厚さの変化が抑制さ
れる。二次電池１は充放電の繰り返しや満充電状態での
高温放置によりガスが発生し、機械的に弱い電池缶３１
の中央部分が膨れる傾向にあるが、その膨らみは被覆部
４４の厚さ内で吸収されるので、二次電池１の厚さ変化
による影響が避けられる。As shown in FIG. 2, the upper insulating holder 13 and the lower insulating holder 14 are provided with a covering portion 44 for covering the upper and lower portions of the long side surface of the secondary battery 1 so as to fit into the secondary battery 1. The connection is assured, and the winding of the insulating label 7 is facilitated. The formation of the covering portion 44 can be provided also in the configuration shown in FIGS. 7 and 8 and does not cover the entire side surface of the secondary battery 1, so that room for expansion is secured in the battery can 31 and expansion occurs. Also, the change in the overall thickness is suppressed. The secondary battery 1 generates gas due to repeated charge / discharge or is left at a high temperature in a fully charged state, and the mechanically weak battery can 31
The central portion of the secondary battery 1 tends to swell, but the swelling is absorbed within the thickness of the covering portion 44, so that the influence of the thickness change of the secondary battery 1 can be avoided.
【００３８】上記のように上部絶縁ホルダ１３及び下部
絶縁ホルダ１４が取り付けられた後、上部絶縁ホルダ１
３の段差部４３から下の側周面に絶縁ラベル７が貼着さ
れる。絶縁ラベル７は、熱収縮シートに粘着剤を施して
形成されたもので、各構成部材上に粘着すると同時に熱
収縮により各構成部材を被覆して一体化させる。この絶
縁ラベル７は、その表面に意匠印刷を施すことができる
ので、美麗な外観を呈する外装体とすることができ、使
用説明、注意書き等を表示することができる。After the upper insulating holder 13 and the lower insulating holder 14 are attached as described above, the upper insulating holder 1
The insulating label 7 is attached to the side peripheral surface below the step portion 43 of No. 3. The insulating label 7 is formed by applying a pressure-sensitive adhesive to a heat-shrinkable sheet. The insulating label 7 is adhered to each constituent member and, at the same time, is coated and integrated by heat shrinkage. Since the insulating label 7 can be subjected to design printing on its surface, it can be used as an exterior body having a beautiful appearance, and can display instructions for use and notes.
【００３９】上記のように構成された電池保護回路を備
えた二次電池は、図１に示したように、二次電池１の高
さ寸法を少し延長しただけで電池保護回路が内装され、
この状態で機器にセットすると、自らが電池保護機能を
備えて信頼性の高い電池電源となる。また、上面に配置
されたプラス端子４、マイナス端子５、温度検出端子６
は左右非対称に配置されているので、機器への逆装填が
防止できる。As shown in FIG. 1, the secondary battery provided with the battery protection circuit configured as described above is provided with the battery protection circuit only by slightly extending the height of the secondary battery 1,
When set in a device in this state, the device itself has a battery protection function and becomes a highly reliable battery power source. In addition, a plus terminal 4, a minus terminal 5, and a temperature detection terminal 6
Since the are arranged asymmetrically in the left and right direction, reverse loading of the device can be prevented.
【００４０】扁平形の二次電池１は、その主たる使途が
小型の携帯電子機器の電池電源であり、厚さの増加は扁
平形の利点を損なうことになるが、本構成では二次電池
１の厚さを増加させることなく電池保護回路を設けるこ
とができ、電池パックの形態でなく小型軽量化された電
池保護回路付きの二次電池が構成されるので、小型の携
帯電子機器の小型化、軽量化に寄与するものとなる。The flat secondary battery 1 is mainly used for a battery power source of a small portable electronic device, and an increase in thickness impairs the advantages of the flat secondary battery. A battery protection circuit can be provided without increasing the thickness of the battery, and a secondary battery with a battery protection circuit that is smaller and lighter than a battery pack is configured. , Which contributes to weight reduction.
【００４１】また、本実施形態に適用した二次電池１
は、封口部に正極入出力端子２５、電池缶３１を負極入
出力端子としたリチウムイオン二次電池の例を示した
が、封口部側に負極、電池缶側に正極が設定された二次
電池であっても、接続の変更により同様に実施できるこ
とは言うまでもない。Further, the secondary battery 1 applied to the present embodiment
Shows an example of a lithium ion secondary battery having a positive electrode input / output terminal 25 in the sealing portion and a battery can 31 as a negative electrode input / output terminal, but a secondary battery in which a negative electrode is set in the sealing portion and a positive electrode is set in the battery can side. Needless to say, a battery can be similarly implemented by changing the connection.
【００４２】[0042]
【発明の効果】以上の説明の通り本発明によれば、二次
電池に電池保護回路が一体的に構成されるので、電池パ
ックの構成を設けることなく電池のみを機器に装填する
感覚で使用することができ、二次電池を電源として使用
する機器の小型化、軽量化に寄与できるものとなる。ま
た、電池保護回路の機能向上によりＰＴＣ素子や電流遮
断弁を設けることなく二次電池を過充電、過放電や過電
流等から保護することができ、二次電池の容量を低下さ
せることなく信頼性の高い電池保護の機能をコンパクト
に構成することができる。As described above, according to the present invention, since the battery protection circuit is integrally formed with the secondary battery, it can be used as if only the battery is loaded in the device without providing a battery pack. This can contribute to miniaturization and weight reduction of equipment using a secondary battery as a power supply. In addition, by improving the function of the battery protection circuit, the secondary battery can be protected from overcharge, overdischarge, overcurrent, etc. without providing a PTC element or a current cutoff valve, and can be reliably used without reducing the capacity of the secondary battery. A highly reliable battery protection function can be configured compactly.
【図１】実施形態に係る電池保護装置付き二次電池の外
観図。FIG. 1 is an external view of a secondary battery with a battery protection device according to an embodiment.
【図２】各構成要素を分解して組み立て構造を示す斜視
図。FIG. 2 is a perspective view showing an assembled structure by disassembling each component.
【図３】二次電池の構成を示す（ａ）は平面図、（ｂ）
は断面図。FIGS. 3A and 3B show a configuration of a secondary battery; FIG.
Is a sectional view.
【図４】スペーサの構成を示す（ａ）は上面側、（ｂ）
は下面側の平面図、（ｃ）はＡ−Ａ線矢視断面図。FIGS. 4A and 4B show the structure of a spacer, FIG.
Is a plan view of the lower surface side, and (c) is a cross-sectional view taken along line AA.
【図５】回路基板の構成を示す（ａ）は表面側、（ｂ）
は裏面側の平面図。FIGS. 5A and 5B show the configuration of the circuit board, FIG.
Is a plan view of the back side.
【図６】電池保護回路を備えた二次電池の電気的構成を
示す回路図。FIG. 6 is a circuit diagram showing an electrical configuration of a secondary battery including a battery protection circuit.
【図７】上部絶縁ホルダの別態様を示す（ａ）は上面
図、（ｂ）は正面図、（ｃ）は左側面図、（ｄ）は右側
面図、（ｅ）は下面図。7A is a top view, FIG. 7B is a front view, FIG. 7C is a left side view, FIG. 7D is a right side view, and FIG. 7E is a bottom view showing another embodiment of the upper insulating holder.
【図８】下部絶縁ホルダの別態様を示す（ａ）は上面
図、（ｂ）は正面図、（ｃ）は左側面図、（ｄ）は右側
面図、（ｅ）は下面図。8 (a) is a top view, FIG. 8 (b) is a front view, FIG. 8 (c) is a left side view, FIG. 8 (d) is a right side view, and FIG.
１ 二次電池 ４ プラス端子 ５ マイナス端子 ６ 温度検出端子 ７ 絶縁ラベル ９ 回路基板 １０ リード板 １１ 接続板 １２ スペーサ １３ 上部絶縁ホルダ １４ 下部絶縁ホルダ ２５ 正極入出力端子（突出端子） ３１ 電池缶 ３３ 発電要素 ３７ 位置決め部 ４３ 段差部 ４４ 被覆部 DESCRIPTION OF SYMBOLS 1 Secondary battery 4 Positive terminal 5 Negative terminal 6 Temperature detection terminal 7 Insulation label 9 Circuit board 10 Lead plate 11 Connection plate 12 Spacer 13 Upper insulating holder 14 Lower insulating holder 25 Positive input / output terminal (protruding terminal) 31 Battery can 33 Power generation Element 37 Positioning part 43 Step part 44 Cover part
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ // Ｈ０１Ｍ 10/40 Ｈ０１Ｍ 10/40 Ｚ (72)発明者 石丸 毅 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 川邉 勝 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 白澤 勝行 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平８−31460（ＪＰ，Ａ) 特開 平11−187578（ＪＰ，Ａ) 特開 平７−201358（ＪＰ，Ａ) 特開 平９−320643（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 2/30 - 2/34 H01M 2/02 - 2/08 H01M 10/40 - 10/48 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI // H01M 10/40 H01M 10/40 Z (72) Inventor Takeshi Ishimaru 1006 Kazuma Kazuma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Masaru Kawabe 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Katsuyuki Shirasawa 1006 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) JP-A-8-31460 (JP, A) JP-A-11-187578 (JP, A) JP-A-7-201358 (JP, A) JP-A-9-320643 (JP, A) (58) (Int.Cl. 7 , DB name) H01M 2/30-2/34 H01M 2/02-2/08 H01M 10/40-10/48
Claims (14)
電池缶と、この電池缶の開口端を封口する封口部の中央
に前記電池缶と絶縁して設けられた突出端子とに、正極
または負極がそれぞれ設定されてなる二次電池に、この
二次電池を過充電、過放電等から保護する電池保護回路
が一体的に設けられてなる電池保護回路を備えた二次電
池であって、電池缶の 封口部側に前記電池保護回路及び複数の入出力
端子を形成した回路基板が配設され、前記突出端子と電
池缶とがそれぞれ電池保護回路を介して前記入出力端子
に接続され、電池缶の封口部側に、回路基板上に形成された入出力端
子部分に開口部を形成して回路基板上を覆うと共に電池
缶の底面側に向けて延出する一対の延出部の先端に連結
部が形成された上部絶縁ホルダを配し、電池缶の底面側
に、電池缶の底面を覆うと共に電池缶の封口部側に向け
て延出する一対の延出部の先端に連結部が形成された下
部絶縁ホルダを配して、上部絶縁ホルダ及び下部絶縁ホ
ルダをそれぞれの連結部間で連結させ 、上部絶縁ホルダ及び下部絶縁ホルダの側周部を含む二次
電池の側周面が 絶縁シートで被覆されてなることを特徴
とする電池保護回路を備えた二次電池。1. A battery can in which a power generating element is accommodated in a bottomed cylindrical container, and a protruding terminal provided insulated from the battery can at the center of a sealing portion for sealing an open end of the battery can. A secondary battery having a battery protection circuit in which a positive electrode or a negative electrode is set, and a battery protection circuit for protecting the secondary battery from overcharging, overdischarging, etc. are integrally provided. A circuit board on which the battery protection circuit and a plurality of input / output terminals are formed is disposed on the side of the sealing portion of the battery can, and the projecting terminal and the battery can are respectively connected to the input / output terminals via the battery protection circuit. Connected, the input / output terminal formed on the circuit board, on the side of the sealed part of the battery can
An opening is formed in the child part to cover the circuit board and the battery
Connected to the tip of a pair of extensions that extend toward the bottom of the can
Place the upper insulating holder with the part formed, and place it on the bottom side of the battery can.
Cover the bottom of the battery can and
The connecting part is formed at the tip of a pair of extending parts
The upper insulating holder and the lower insulating holder.
The secondary connection including the side peripheral parts of the upper insulating holder and the lower insulating holder
A secondary battery provided with a battery protection circuit, wherein a side peripheral surface of the battery is covered with an insulating sheet.
電池缶と、この電池缶の開口端を封口する封口部の中央
に前記電池缶と絶縁して設けられた突出端子とに、正極
または負極がそれぞれ設定されてなる二次電池に、この
二次電池を過充電、過放電等から保護する電池保護回路
が一体的に設けられてなる電池保護回路を備えた二次電
池であって、 前記電池缶の封口部側に、前記突出端子に接合した接続
板と、電池保護回路が形成されると共に複数の入出力端
子が形成された回路基板と、この回路基板の座面を形成
して二次電池との間を離隔するスペーサとが配設され、 前記電池缶に接合されたリード板と前記接続板とを、そ
れぞれ前記回路基板の所定位置に接続することにより、
二次電池と回路基板とが一体化されると共に、二次電池
と電池保護回路とが電気的接続されて二次電池の正極及
び負極が電池保護回路を介して前記入出力端子に接続さ
れ、 電池缶の封口部側に、回路基板上に形成された入出力端
子部分に開口部を形成して回路基板上を覆うと共に電池
缶の底面側に向けて延出する一対の延出部の先端に連結
部が形成された上部絶縁ホルダを配し、電池缶の底面側
に、電池缶の底面を覆うと共に電池缶の封口部側に向け
て延出する一対の延出部の先端に連結部が形成された下
部絶縁ホルダを配して、上部絶縁ホルダ及び下部絶縁ホ
ルダをそれぞれの連結部間で連結させ、 上部絶縁ホルダ及び下部絶縁ホルダの側周部を含む二次
電池の側周面を絶縁シートで被覆して構成されてなるこ
とを特徴とする電池保護回路を備えた二次電池。2. A battery can containing a power generating element in a bottomed cylindrical container, and a protruding terminal provided at the center of a sealing portion for sealing an open end of the battery can and insulated from the battery can. A secondary battery having a battery protection circuit in which a positive electrode or a negative electrode is set, and a battery protection circuit for protecting the secondary battery from overcharging, overdischarging, etc. are integrally provided. A connecting plate joined to the protruding terminal, a circuit board on which a battery protection circuit is formed and a plurality of input / output terminals are formed, and a seat surface of the circuit board, A spacer formed and spaced from the secondary battery is provided, and the lead plate and the connection plate joined to the battery can are connected to predetermined positions of the circuit board, respectively.
While the secondary battery and the circuit board are integrated, the secondary battery and the battery protection circuit are electrically connected, the positive electrode and the negative electrode of the secondary battery are connected to the input / output terminal via the battery protection circuit, An opening is formed in the input / output terminal portion formed on the circuit board on the sealing side of the battery can to cover the circuit board, and a pair of extending ends extending toward the bottom side of the battery can. An upper insulating holder having a connecting portion formed thereon is disposed on the bottom side of the battery can. The connecting portion covers the bottom surface of the battery can and extends to the sealing portion side of the battery can. Is formed, and the upper insulating holder and the lower insulating holder are connected between the respective connecting portions. The side peripheral surface of the secondary battery including the side peripheral portions of the upper insulating holder and the lower insulating holder is removed. Battery protection circuit characterized by being covered with an insulating sheet Secondary battery with a.
成され、突出端子が長円形に形成されてなる請求項１ま
たは２記載の電池保護回路を備えた二次電池。3. The secondary battery provided with a battery protection circuit according to claim 1, wherein the secondary battery is formed in a flat shape with an oblong cross section, and the protruding terminal is formed in an oblong shape.
品が、封口部上に形成された凹部に対応する位置に配置
されてなる請求項１〜３いずれか一項に記載の電池保護
回路を備えた二次電池。4. The battery protection according to claim 1, wherein the electronic component mounted on the sealing portion side of the circuit board is arranged at a position corresponding to the concave portion formed on the sealing portion. Secondary battery with circuit.
する位置決め部と、回路基板上に装着された電子部品に
対応する位置に開口部とが形成されてなる請求項２記載
の電池保護回路を備えた二次電池。5. A spacer, a positioning unit for secondary battery and a circuit board, an opening is formed at a position corresponding to the electronic components mounted on a circuit board according to claim 2, wherein <br/> of A secondary battery with a battery protection circuit.
子の長手方向に平行して配設される位置決め突起である
請求項５記載の電池保護回路を備えた二次電池。6. The positioning projection for the secondary battery is a positioning projection disposed in parallel with the longitudinal direction of the protruding terminal.
A secondary battery comprising the battery protection circuit according to claim 5 .
子が非対称に配置されてなる請求項１または２記載の電
池保護回路を備えた二次電池。7. A secondary battery provided with a battery protection circuit according to claim 1, wherein a plurality of input / output terminals provided on a circuit board are arranged asymmetrically.
の被覆位置を定める段差が形成されてなる請求項１〜３
いずれか一項に記載の電池保護回路を備えた二次電池。8. A step for determining a covering position of the insulating sheet is formed on a side peripheral portion of the upper insulating holder.
A secondary battery comprising the battery protection circuit according to any one of the preceding claims.
扁平形状に形成された二次電池の短側面と、長側面の一
部とを覆う被覆部が形成されてなる請求項１〜８いずれ
か一項に記載の電池保護回路を備えた二次電池。9. An upper insulating holder and a lower insulating holder,
9. The flat battery according to claim 1 , wherein a cover is formed to cover the short side and a part of the long side of the secondary battery.
A secondary battery comprising the battery protection circuit according to any one of the preceding claims.
が、それぞれの連結部を重合及び／又は係合させること
によって連結される請求項１〜８いずれか一項に記載の
電池保護回路を備えた二次電池。10. upper insulating holder and the lower insulating holder, equipped with a battery protection circuit according to claim 8 any one coupled by causing the respective connecting portions polymerization and / or engaged two Next battery.
に接合され、扁平形状の電池缶の短側面に沿って封口部
側に延出されてなる請求項２記載の電池保護回路を備え
た二次電池。11. The battery protection circuit according to claim 2 , wherein one end of the lead plate is joined to the bottom surface of the battery can, and the lead plate extends to the sealing portion along the short side surface of the flat battery can. Rechargeable battery.
延出部に、リード板を収容する凹部または開放部が形成
されてなる請求項１１記載の電池保護回路を備えた二次
電池。12. A secondary battery having a battery protection circuit according to claim 11, wherein a concave portion or an open portion for accommodating a lead plate is formed in an extension of the upper insulating holder and the lower insulating holder.
同一または断面サイズより小さく形成されてなる請求項
１〜７いずれか一項に記載の電池保護回路を備えた二次
電池。13. A secondary battery provided with the battery protection circuit according to claim 1, wherein the circuit board is formed to have the same sectional size or smaller than the sectional size of the secondary battery.
状態を検出して充放電回路を遮断する主制御回路と、こ
の主制御回路の異常時に充放電回路を遮断する副制御回
路とを備えた二重保護回路が形成されてなり、主副各制
御回路それぞれの接地部位が分離されてなる請求項１ま
たは２記載の電池保護回路を備えた二次電池。14. A battery control circuit comprising: a main control circuit for detecting a state such as overcharge or overdischarge and shutting off the charge / discharge circuit; and a sub-control circuit for shutting down the charge / discharge circuit when the main control circuit is abnormal. A secondary battery comprising a battery protection circuit according to claim 1 or 2, wherein a double protection circuit comprising: a main protection circuit and a control circuit;
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000005851A JP3221870B2 (en) | 2000-01-07 | 2000-01-07 | Secondary battery with battery protection circuit |
| KR10-2000-7013521A KR100484420B1 (en) | 1999-03-30 | 2000-03-29 | Rechargeable battery with protective circuit |
| CNB008004137A CN1180507C (en) | 1999-03-30 | 2000-03-29 | Rechargeable battery with protective circuit |
| PCT/JP2000/001982 WO2000059064A1 (en) | 1999-03-30 | 2000-03-29 | Rechargeable battery with protective circuit |
| EP00912940A EP1093178A4 (en) | 1999-03-30 | 2000-03-29 | Rechargeable battery with protective circuit |
| US09/701,667 US6524732B1 (en) | 1999-03-30 | 2000-03-29 | Rechargeable battery with protective circuit |
| TW089106192A TW472406B (en) | 1999-03-30 | 2000-03-30 | Secondary battery with battery protection circuit |
| US10/282,884 US6759152B2 (en) | 1999-03-30 | 2002-10-29 | Rechargeable battery equipped with battery protection circuit |
| US10/340,936 US6893753B2 (en) | 1999-03-30 | 2003-01-13 | Rechargeable battery equipped with battery protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000005851A JP3221870B2 (en) | 2000-01-07 | 2000-01-07 | Secondary battery with battery protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001196048A JP2001196048A (en) | 2001-07-19 |
| JP3221870B2 true JP3221870B2 (en) | 2001-10-22 |
Family
ID=18534472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000005851A Expired - Fee Related JP3221870B2 (en) | 1999-03-30 | 2000-01-07 | Secondary battery with battery protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3221870B2 (en) |
Cited By (1)
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|---|---|---|---|---|
| KR100889524B1 (en) * | 2002-10-02 | 2009-03-24 | 삼성에스디아이 주식회사 | Battery |
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| TWI221345B (en) | 2001-03-30 | 2004-09-21 | Sanyo Gs Soft Energy Co Ltd | Battery pack |
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| KR20080042302A (en) * | 2006-11-09 | 2008-05-15 | 임성길 | Battery pack having protection circuit module |
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| KR101030858B1 (en) * | 2007-09-28 | 2011-04-22 | 삼성에스디아이 주식회사 | Secondary battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100889524B1 (en) * | 2002-10-02 | 2009-03-24 | 삼성에스디아이 주식회사 | Battery |
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|---|---|
| JP2001196048A (en) | 2001-07-19 |
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