JP3382002B2 - Battery pack and equipment using battery pack for operation - Google Patents
Battery pack and equipment using battery pack for operationInfo
- Publication number
- JP3382002B2 JP3382002B2 JP02932694A JP2932694A JP3382002B2 JP 3382002 B2 JP3382002 B2 JP 3382002B2 JP 02932694 A JP02932694 A JP 02932694A JP 2932694 A JP2932694 A JP 2932694A JP 3382002 B2 JP3382002 B2 JP 3382002B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- secondary battery
- battery pack
- overcharge
- voltage
- 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
Landscapes
- Power Sources (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、過充電、過放電保護を
必要とする二次電池を内蔵した電池パック及び電池パッ
クを動作用電源とする機器に関する。This invention relates to overcharge the battery pack and the battery pack with a built-in rechargeable battery that requires over-discharge protection
A device that uses a power supply for operation .
【０００２】[0002]
【従来の技術】二次電池をバッテリィ駆動時の主電源供
給源とするポータブルコンピュータ、ワードプロセッサ
等の携帯型電子機器に於いては、機器の高機能、高性能
化に伴ない、容量の大きな二次電池の要求が高まってき
た。この要求に応えるべくバッテリィ駆動時の電源とし
て、リチウム・イオン二次電池が注目されている。2. Description of the Related Art In portable electronic devices such as portable computers and word processors that use a secondary battery as a main power supply source when they are driven by a battery, a large capacity is required due to the high functionality and high performance of the devices. The demand for secondary batteries has increased. In order to meet this demand, lithium-ion secondary batteries are drawing attention as a power source for battery drive.
【０００３】この種の二次電池は、過剰な放電（過放
電）または充電（過充電）を電池に対して行なった場
合、電池寿命を早めたり、爆発等の危険につながること
もあり、電池性能並びに安全性の面で種々の配慮が必要
とされる。This type of secondary battery may shorten the battery life or lead to explosion or the like if the battery is excessively discharged (over-discharged) or charged (over-charged). Various considerations are required in terms of performance and safety.
【０００４】そこで、上記したような過剰な放電（過放
電）や過剰な充電（過充電）を防止するために、電池パ
ックに、図８に示すような内蔵回路を設ける構成が考え
られた。Therefore, in order to prevent the above-mentioned excessive discharge (over-discharge) and excessive charge (over-charge), it has been considered that the battery pack is provided with a built-in circuit as shown in FIG.
【０００５】即ち、電池パック８０の内部に、リチウム
・イオン二次電池８１、及び同電池の電圧をセル単位で
測定する電池電圧測定部８２と、この電池電圧測定部８
２で測定した電池電圧と予め定められた過充電・過放電
保護設定値とを比較して電池異常を検出する検出部８４
と、この検出部８４より電池異常を示す異常検出信号が
出力されたとき二次電池８１の充放電路を回路遮断する
スイッチ８４等が設けられる。That is, inside the battery pack 80, a lithium-ion secondary battery 81, a battery voltage measuring unit 82 for measuring the voltage of the battery on a cell-by-cell basis, and the battery voltage measuring unit 8
Detection unit 84 for detecting a battery abnormality by comparing the battery voltage measured in 2 with a predetermined overcharge / overdischarge protection set value
A switch 84 and the like for disconnecting the circuit of the charging / discharging path of the secondary battery 81 when an abnormality detection signal indicating a battery abnormality is output from the detection unit 84 are provided.
【０００６】上記構成に於いて、電池電圧測定部８２
は、リチウム二次電池８１の各セル毎の電圧を常時監視
し、その測定した電圧値を検出部８４に供給している。
電池パック８０から外部へ電力を供給している場合、即
ち放電状態時に於いては、リチウム電池の性質により、
放電の進行に伴い電池電圧が低下してゆく。In the above structure, the battery voltage measuring unit 82
Constantly monitors the voltage of each cell of the lithium secondary battery 81 and supplies the measured voltage value to the detection unit 84.
When power is supplied from the battery pack 80 to the outside, that is, in the discharged state, due to the nature of the lithium battery,
The battery voltage decreases as the discharge progresses.
【０００７】検出部８３は、電池電圧測定部８２で測定
した電池電圧が、予め定められた過放電保護設定値より
低くなって、電池の放電が過剰に進行したと判断する
と、電池異常を示す異常検出信号を出力し、スイッチ８
４をオフ（ＯＦＦ）制御して、電池パック８０から外部
への電力供給を停止し、リチウム二次電池８１の過剰な
放電（過放電）を抑える。When the detecting unit 83 determines that the battery voltage measured by the battery voltage measuring unit 82 becomes lower than a predetermined over-discharge protection set value and the battery is excessively discharged, it indicates a battery abnormality. Outputs the abnormality detection signal and switches 8
4 is turned off (OFF), the power supply from the battery pack 80 to the outside is stopped, and excessive discharge (overdischarge) of the lithium secondary battery 81 is suppressed.
【０００８】電池パックを外部の電力により充電する、
充電状態時に於いては、リチウム二次電池８１に定電流
・定電圧充電を行なう。この充電中に、電池電圧測定部
８２で測定される各セル単位の電圧が何等かの原因で、
予め定められた過充電保護設定値より上昇し、過剰に充
電が行なわれると、その過充電状態が検出部８３で検出
される。検出部８３は上記過充電状態を検出すると、異
常検出信号を出力して、スイッチ８４をオフ（ＯＦＦ）
制御し、電池パック８０の充電電流路を回路遮断して、
外部から電池パック８０への充電電流の供給を停止し、
リチウム二次電池８１の過剰な充電（過充電）を防止す
る。Charging the battery pack with external power,
In the charged state, the lithium secondary battery 81 is charged with constant current and constant voltage. During this charging, the voltage of each cell unit measured by the battery voltage measuring unit 82 is for some reason,
When the value exceeds a predetermined overcharge protection set value and the battery is overcharged, the overcharge state is detected by the detection unit 83. When the detection unit 83 detects the overcharged state, it outputs an abnormality detection signal and turns off the switch 84.
Control, cut off the charging current path of the battery pack 80,
Stop supplying the charging current from the outside to the battery pack 80,
Excessive charging (overcharging) of the lithium secondary battery 81 is prevented.
【０００９】しかしながら、このような構成による電池
パックに於いては以下のような問題が生じていた。即
ち、電池パック内にスイッチ等の回路部品を多数実装し
なければならないため、電池パックの小型化、低コスト
化の妨げになる。又、過放電や過充電状態に至った場
合、電池パックの外部にはその情報が伝達されず、電池
パック内部で単独に充放電路のスイッチオフ（ＯＦＦ）
による電源遮断処理が行なわれるため、電池パックから
の電力供給により機器が動作している際に、突然、機器
への動作用電源供給が断たれ、このため機器が正常終了
できないという使用上の不具合が発生する。However, the battery pack having such a structure has the following problems. That is, a large number of circuit components such as switches must be mounted in the battery pack, which hinders downsizing and cost reduction of the battery pack. Also, when an over-discharged or over-charged state is reached, the information is not transmitted to the outside of the battery pack, and the charging / discharging path is switched off (OFF) independently inside the battery pack.
Since the power is shut down by the device, the operating power supply to the device is suddenly cut off when the device is operating by the power supply from the battery pack, which prevents the device from ending normally. Occurs.
【００１０】[0010]
【発明が解決しようとする課題】上述したように、従来
の過充電・過放電保護機構を備えた電池パックに於いて
は、電池パック内に過充電及び過放電の各検出回路、充
放電路を遮断するスイッチ等、多数の回路部品を実装す
るため、電池パックの小型化・低コスト化の妨げになる
とともに、過放電や過充電状態に至った場合に、電池パ
ック外部にその情報が伝達されず、電池パック内部でス
イッチオフによる電源供給遮断処理が行なわれるため、
電池パックからの電力供給による機器の動作中に、突
然、動作用の電力供給が停止してしまい、機器が正常に
終了できないという不具合が生じていた。As described above, in the conventional battery pack having the overcharge / overdischarge protection mechanism, the overcharge and overdischarge detection circuits and the charging / discharging path are provided in the battery pack. Since many circuit components such as a switch that shuts off the battery are mounted, this hinders the miniaturization and cost reduction of the battery pack, and when the battery is over-discharged or over-charged, the information is transmitted to the outside of the battery pack. Instead, the power supply is cut off by switching off inside the battery pack.
During the operation of the device by the power supply from the battery pack, the power supply for the operation suddenly stopped, and the device could not be normally terminated.
【００１１】本発明は上記実情に鑑みなされたもので、
過放電保護を必要とする二次電池を内蔵した電池パック
に於いて、二次電池の過放電状態を即時にパック外へ出
力できる電池パックを提供することを目的とする。The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a battery pack having a built-in secondary battery that requires over-discharge protection, which can immediately output the over-discharged state of the secondary battery to the outside of the pack.
【００１２】又、本発明は、過充電保護を必要とする二
次電池を内蔵した電池パックに於いて、二次電池の過充
電状態を即時にパック外へ出力できる電池パックを提供
することを目的とする。Further, the present invention provides a battery pack having a built-in secondary battery which requires overcharge protection, which can immediately output the overcharged state of the secondary battery to the outside of the pack. To aim.
【００１３】又、本発明は、過放電保護を必要とする二
次電池を内蔵した電池パック二次電池を内蔵した電池パ
ックを動作用電源として用いる機器に於いて、電池パッ
クの内部に、内蔵二次電池の過放電状態を即時に外部へ
通知する手段を設け、電池パック外部に二次電池の過放
電保護を行なう回路を設けて、電池パック内蔵回路の簡
素化を図りつつ、二次電池の過放電保護機構を実現する
とともに、電池パックからの電力供給で動作している機
器が常に正常終了できるようにした電池パックを動作用
電源とする機器を提供することを目的とする。Further, the present invention is a battery pack containing a secondary battery which requires over-discharge protection. In a device using a battery pack containing a secondary battery as an operating power source, the battery pack is incorporated inside the battery pack. A means for notifying the over-discharged state of the secondary battery to the outside immediately is provided, and a circuit for protecting the over-discharged state of the secondary battery is provided outside the battery pack to simplify the internal circuit of the battery pack, In addition to implementing the over-discharge protection mechanism, the battery pack for operation can always be terminated normally by the device operating with the power supplied from the battery pack.
The purpose is to provide a device as a power source .
【００１４】又、本発明は、過充電保護を必要とする二
次電池を内蔵した電池パック二次電池を内蔵した電池パ
ックを動作用電源として用いる機器に於いて、電池パッ
クの内部に、内蔵二次電池の過充電状態を即時に外部へ
通知する手段を設け、電池パック外部に二次電池の過充
電保護を行なう回路を設けて、電池パック内蔵回路の簡
素化を図りつつ、二次電池の過充電保護機構を実現する
とともに、電池パックからの電力供給で動作している機
器が常に正常終了できるようにした電池パックを動作用
電源とする機器を提供することを目的とする。Further, the present invention is a battery pack containing a secondary battery which requires overcharge protection. In a device using a battery pack containing a secondary battery as an operating power source, the battery pack is incorporated inside the battery pack. A means for notifying the overcharge status of the secondary battery to the outside immediately is provided, and a circuit for protecting the overcharge of the secondary battery is provided outside the battery pack to simplify the internal circuit of the battery pack and to improve the secondary battery. In addition to realizing the overcharge protection mechanism of the above, the battery pack for operation can be always shut down normally by the device operating by the power supply from the battery pack.
The purpose is to provide a device as a power source .
【００１５】又、本発明は、二次電池を内蔵した電池パ
ックに於いて、内蔵二次電池の過放電、過充電等による
電池異常が発生した際に、その状態を即時に外部へ通知
するとともに、過充電を検出したとき、パック内部で充
電路を回路遮断して、電池パック自身が内蔵二次電池の
過充電保護を行なうとともに、電池パックからの電力供
給で動作している機器が常に正常終了できるようにした
電池パックを提供することを目的とする。Further, according to the present invention, in a battery pack having a built-in secondary battery, when a battery abnormality occurs due to over-discharge, overcharge, etc. of the built-in secondary battery, the state is immediately notified to the outside. At the same time, when overcharging is detected, the circuit inside the pack is disconnected from the charging path to protect the built-in secondary battery from overcharging, and the equipment that is operating with power supplied from the battery pack is always The object is to provide a battery pack that can be normally terminated.
【００１６】[0016]
【課題を解決するための手段及び作用】本発明は、図１
に示すように、過放電保護を必要とする二次電池１１を
内蔵した電池パック１０に於いて、二次電池１１を構成
する電池セル各々の電池電圧を監視する電圧測定部１２
と、その測定電池電圧を予め設定された過放電保護設定
電圧と比較して二次電池の過放電状態を検出する検出部
１３と、この検出情報を外部へ出力する回路とを具備
し、内蔵二次電池１１が過放電状態となった際に、その
異常を即時にパック外へ出力する構成としたもので、こ
れにより当該電池パックからの電力供給で動作している
機器を常に正常終了させることができるとともに、過放
電による電池寿命劣化を防止することができる。又、電
池パック１０の内部回路を簡素化して、メンテナンスの
容易化、コストの低減化、小形化を図ることができる。Means and Actions for Solving the Problems The present invention is based on FIG.
As shown in FIG. 2, in the battery pack 10 including the secondary battery 11 that requires over-discharge protection, the voltage measuring unit 12 that monitors the battery voltage of each battery cell that constitutes the secondary battery 11
And a detection unit 13 for detecting the overdischarge state of the secondary battery by comparing the measured battery voltage with a preset overdischarge protection set voltage, and a circuit for outputting this detection information to the outside. When the secondary battery 11 is in the over-discharged state, the abnormality is immediately output to the outside of the pack, so that the device operating by the power supply from the battery pack is always normally terminated. In addition, it is possible to prevent deterioration of battery life due to over discharge. Further, the internal circuit of the battery pack 10 can be simplified to facilitate the maintenance, reduce the cost, and reduce the size.
【００１７】又、本発明は、図２に示すように、過充電
保護を必要とする二次電池２１を内蔵した電池パック２
０に於いて、二次電池２１を構成する電池セル各々の電
池電圧を監視する電圧測定部２２と、その測定電池電圧
を予め設定された過充電保護設定電圧と比較して二次電
池の過充電状態を検出する検出部２３と、この検出情報
を外部へ出力する回路とを具備して、内蔵二次電池２１
が過充電状態となった際に、その異常を即時にパック外
へ出力する構成としたもので、これにより、当該電池パ
ックからの電力供給で動作している機器を常に正常終了
させることができるとともに、過充電による内蔵二次電
池の寿命劣化、異常加熱、破壊等を防止することができ
る。又、電池パック２０の内部回路を簡素化して、メン
テナンスの容易化、コストの低減化、小形化を図ること
ができる。Further, according to the present invention, as shown in FIG. 2, a battery pack 2 incorporating a secondary battery 21 requiring overcharge protection.
At 0, the voltage measuring unit 22 that monitors the battery voltage of each battery cell that constitutes the secondary battery 21, and compares the measured battery voltage with a preset overcharge protection set voltage, The built-in secondary battery 21 includes a detection unit 23 that detects the state of charge and a circuit that outputs the detection information to the outside.
When the battery is overcharged, the abnormality is immediately output to the outside of the pack, which allows the device operating by the power supply from the battery pack to be normally terminated. At the same time, it is possible to prevent deterioration of the life of the built-in secondary battery due to overcharging, abnormal heating, destruction, and the like. Further, the internal circuit of the battery pack 20 can be simplified to facilitate the maintenance, reduce the cost, and reduce the size.
【００１８】又、本発明は、図３に示すように、過放電
保護が必要な二次電池３１を内蔵した電池パック３０を
動作用電源として用いるシステムに於いて、電池パック
３０の内部に、二次電池３１を構成する電池セル各々の
電池電圧を測定する電圧測定部３２と、この測定電圧を
過放電保護設定電圧と比較し二次電池３１の過放電状態
を検出して外部へ出力する検出部とを設け、電池パック
３０の外部に、上記検出信号をもとに二次電池３１の放
電路を遮断制御するスイッチ３４を設けた構成としたも
ので、これにより、電池パック内蔵回路を簡素化して二
次電池の過放電保護機構を実現するとともに、電池パッ
クからの電力供給で動作している機器が常に正常終了で
きる。Further, as shown in FIG. 3, the present invention is a system in which a battery pack 30 containing a secondary battery 31 which requires over-discharge protection is used as a power source for operation. A voltage measuring unit 32 that measures the battery voltage of each battery cell that constitutes the secondary battery 31, and compares the measured voltage with an overdischarge protection set voltage to detect the overdischarged state of the secondary battery 31 and output it to the outside. A detection unit is provided, and a switch 34 that cuts off the discharge path of the secondary battery 31 based on the above detection signal is provided outside the battery pack 30. It simplifies and realizes an over-discharge protection mechanism for the secondary battery, and at the same time, the device operating by the power supply from the battery pack can always end normally.
【００１９】又、本発明は、図４に示すように、過充電
保護が必要な二次電池４１を内蔵した電池パック４０を
動作用電源として用いるシステムに於いて、電池パック
４０の内部に、二次電池４１を構成する電池セル各々の
電池電圧を測定する電圧測定部４２と、この測定電圧を
過充電保護設定電圧と比較し二次電池４１の過充電状態
を検出して外部へ出力する検出部とを設け、電池パック
４０の外部に、上記検出信号をもとに二次電池４１の充
電路を遮断制御するスイッチ４４を設けた構成としたも
ので、これにより、電池パック内蔵回路を簡素化して二
次電池の過充電保護機構を実現でき、過充電による内蔵
二次電池の寿命劣化、異常加熱、破壊等を防止すること
ができるとともに、電池パックからの電力供給で動作し
ている機器が常に正常終了できる。Further, according to the present invention, as shown in FIG. 4, in a system in which a battery pack 40 containing a secondary battery 41 requiring overcharge protection is used as an operating power source, A voltage measuring unit 42 that measures the battery voltage of each battery cell that constitutes the secondary battery 41, and compares the measured voltage with an overcharge protection set voltage to detect the overcharged state of the secondary battery 41 and output it to the outside. A detection unit is provided, and a switch 44 that cuts off the charging path of the secondary battery 41 based on the detection signal is provided outside the battery pack 40. The overcharge protection mechanism of the secondary battery can be simplified and the life of the built-in secondary battery due to overcharging can be prevented from deteriorating, abnormal heating, destruction, etc., and it is operated by the power supply from the battery pack. Equipment is always Always it is terminated.
【００２０】又、本発明は、図５に示すように、過充電
保護を必要とする二次電池５１を内蔵した電池パック５
０に於いて、二次電池５１を構成する電池セル各々の電
池電圧を監視する電圧測定部５２と、この測定電池電圧
を予め設定された過充電保護設定電圧及び過放電保護設
定電圧と比較して二次電池の過充電・過放電状態を検出
する検出部５３と、この検出情報を外部へ出力する回路
５７と、二次電池５１の充電路に介在された溶断部５６
と、この溶断部５６を上記過充電検出情報により溶断す
る発熱素子５５及びスイッチ５４とを備えた構成とした
もので、これにより、内蔵二次電池の過放電、過充電等
による電池異常が発生した際に、その状態を即時に外部
へ通知して、電池パックからの電力供給で動作している
機器が常に正常終了できるようにするとともに、内蔵二
次電池が過充電状態に達した際に、電池パック自身がパ
ック内部で充電路を回路遮断して、外部の機器制御を必
要とせずに内蔵二次電池の過充電保護を行なうことがで
き、過充電による内蔵二次電池の寿命劣化、異常加熱、
破壊等を防止することができる。Further, according to the present invention, as shown in FIG. 5, a battery pack 5 incorporating a secondary battery 51 which requires overcharge protection.
At 0, a voltage measuring unit 52 that monitors the battery voltage of each battery cell that constitutes the secondary battery 51 and compares the measured battery voltage with preset overcharge protection setting voltage and overdischarge protection setting voltage. Detection unit 53 for detecting the overcharge / overdischarge state of the secondary battery, a circuit 57 for outputting this detection information to the outside, and a fusing unit 56 interposed in the charging path of the secondary battery 51.
In addition, the fusing unit 56 is configured to include a heating element 55 and a switch 54 that are blown by the above-mentioned overcharge detection information, which causes a battery abnormality due to overdischarge, overcharge, etc. of the built-in secondary battery. When this happens, the status is immediately notified to the outside so that the devices that are operating with the power supplied from the battery pack can always end normally, and when the built-in secondary battery reaches the overcharged status. , The battery pack itself cuts off the charging path circuit inside the pack and can protect the built-in secondary battery from overcharge without the need for external device control. Abnormal heating,
It is possible to prevent destruction and the like.
【００２１】[0021]
【実施例】以下図面を参照して本発明の実施例を説明す
る。図１は本発明の第１実施例の回路構成を示すブロッ
ク図である。図１に於いて、１０は過放電保護を必要と
する、例えばリチウムイオン二次電池を内蔵した電池パ
ックであり、１１は電池パック１０に内蔵された二次電
池である。１２は二次電池１１の電池電圧を監視する電
圧測定部であり、二次電池１１を構成する電池セル各々
の電池電圧を常時監視する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the circuit configuration of the first embodiment of the present invention. In FIG. 1, reference numeral 10 is a battery pack that requires over-discharge protection, for example, a lithium ion secondary battery is built in, and 11 is a secondary battery built in the battery pack 10. Reference numeral 12 is a voltage measurement unit that monitors the battery voltage of the secondary battery 11, and constantly monitors the battery voltage of each battery cell that constitutes the secondary battery 11.
【００２２】１３は電圧測定部１２で測定した電池電圧
を予め設定された過放電保護設定電圧と比較して二次電
池１１の過放電状態を検出する過放電検出部であり、電
池の残存容量が解放電池電圧にほぼ比例するリチウムイ
オン二次電池の特徴を利用して、放電により電池電圧が
低下し二次電池１１が過剰に放電されると判断したとき
過放電検出信号を出力する。Reference numeral 13 is an over-discharge detection unit that compares the battery voltage measured by the voltage measurement unit 12 with a preset over-discharge protection set voltage to detect the over-discharged state of the secondary battery 11, and indicates the remaining capacity of the battery. Using the characteristic of the lithium-ion secondary battery that is substantially proportional to the released battery voltage, the over-discharge detection signal is output when it is determined that the battery voltage is lowered by the discharge and the secondary battery 11 is excessively discharged.
【００２３】この際の放電電圧と過放電保護設定電圧と
の関係を図７に示している。図７に於いて、Ｄv は二次
電池１１の放電電圧、ＶＳ3 は正常時に於けるローバッ
テリィ検出電圧（供給可能電圧）、ＶＳ4 はこの発明の
実施例で対象とする過放電保護設定電圧である。FIG. 7 shows the relationship between the discharge voltage and the overdischarge protection set voltage at this time. In FIG. 7, Dv is a discharge voltage of the secondary battery 11, VS3 is a low battery detection voltage (supplyable voltage) in a normal state, and VS4 is an overdischarge protection set voltage which is a target in the embodiment of the present invention. .
【００２４】１４は過放電検出部１３の検出情報を電池
パック１０の外部へ出力する、過放電検出信号出力回路
である。上記構成に於いて、電圧測定部１２は、内蔵二
次電池１１の電池電圧を常時観測し、その測定電圧を過
放電検出部１３に供給する。Reference numeral 14 is an overdischarge detection signal output circuit for outputting the detection information of the overdischarge detection unit 13 to the outside of the battery pack 10. In the above configuration, the voltage measuring unit 12 constantly observes the battery voltage of the built-in secondary battery 11 and supplies the measured voltage to the overdischarge detecting unit 13.
【００２５】過放電検出部１３は、電圧測定部１２で測
定した電池電圧を予め設定された過放電保護設定電圧と
比較し、電圧測定部１２で測定した電池電圧が過放電保
護設定電圧より低下して、二次電池１１が過放電状態に
至ったことを検出すると、二次電池１１が過放電になっ
たことを示す過放電検出信号を過放電検出信号出力回路
１４を介し、即時にパック外へ出力する。The overdischarge detection unit 13 compares the battery voltage measured by the voltage measurement unit 12 with a preset overdischarge protection set voltage, and the battery voltage measured by the voltage measurement unit 12 is lower than the overdischarge protection set voltage. Then, when it is detected that the secondary battery 11 has reached an overdischarged state, an overdischarge detection signal indicating that the secondary battery 11 has been overdischarged is immediately sent to the pack through the overdischarge detection signal output circuit 14. Output to outside.
【００２６】即ち、過放電検出部１３は、電池の残存容
量が解放電池電圧にほぼ比例するリチウムイオン二次電
池の特徴を利用し、放電の進行に伴い二次電池１１の電
池電圧が低下して二次電池１１が過剰に放電されると判
断されたとき、過放電検出信号を過放電検出信号出力回
路１４に出力し、二次電池１１が過放電状態に至ったこ
とを電池パック外部に知らせる。That is, the over-discharge detection unit 13 utilizes the characteristic of the lithium-ion secondary battery in which the remaining capacity of the battery is almost proportional to the released battery voltage, and the battery voltage of the secondary battery 11 decreases as the discharge progresses. When it is determined that the secondary battery 11 is excessively discharged, the over-discharge detection signal is output to the over-discharge detection signal output circuit 14, and the fact that the secondary battery 11 has reached the over-discharged state is output to the outside of the battery pack. Inform.
【００２７】この電池パック１０を動作用電源とする機
器、例えばパーソナルコンピュータは、電池パック１０
より過放電検出信号を受けると、使用電池パックが過放
電状態になったこと（又は電源異常が生じたこと）を表
示器又は音声等により使用者に知らせるとともに、所定
の終了処理を実行して、処理を正常終了させ、電池パッ
ク１０の充電路を遮断する等、予め定められたシーケン
スに従う終了処理を行なう。A device that uses the battery pack 10 as an operating power source, such as a personal computer, has a battery pack 10
When the over-discharge detection signal is further received, the user is informed by the display or voice that the used battery pack is in the over-discharged state (or the power supply abnormality has occurred), and the predetermined termination processing is executed. , The process is terminated normally, the charging path of the battery pack 10 is cut off, and the termination process is performed according to a predetermined sequence.
【００２８】このように、電池パック１０に、内蔵二次
電池１１が過放電状態となったとき、その状態を即時に
パック外へ出力する機能回路を設けたことにより、電池
パック１０により動作している機器を常に正常終了で
き、機器の状態を正常に保つことができるとともに、内
蔵二次電池１１の過放電保護が行なえ電池寿命劣化の防
止等が図れる。As described above, when the built-in secondary battery 11 is over-discharged, the battery pack 10 is provided with a functional circuit that immediately outputs the state to the outside of the pack. It is possible to normally terminate the installed device, keep the device in a normal state, protect the built-in secondary battery 11 from over discharge, and prevent the deterioration of the battery life.
【００２９】又、電池パック１０内には、内蔵保護回路
として、二次電池１１の過放電状態を検出する回路のみ
が設けられる構成であることから、内蔵保護回路の部品
点数を削減でき電池パックの容量を小さくできるととも
に、低コスト化、及びメンテナンスの容易化が図れる。Further, since only the circuit for detecting the over-discharged state of the secondary battery 11 is provided in the battery pack 10 as the built-in protection circuit, the number of parts of the built-in protection circuit can be reduced. The capacity can be reduced, the cost can be reduced, and the maintenance can be facilitated.
【００３０】図２は本発明の第２実施例の回路構成を示
すブロック図である。図２に於いて、２０は過充電保護
を必要とする、例えばリチウムイオン二次電池を内蔵し
た電池パックであり、２１は電池パック２０に内蔵され
た二次電池である。２２は二次電池２１の電池電圧を監
視する電圧測定部であり、二次電池２１を構成する電池
セル各々の電池電圧を常時監視する。FIG. 2 is a block diagram showing the circuit configuration of the second embodiment of the present invention. In FIG. 2, reference numeral 20 is a battery pack that requires overcharge protection, for example, a lithium ion secondary battery is built in, and 21 is a secondary battery built in the battery pack 20. A voltage measuring unit 22 monitors the battery voltage of the secondary battery 21, and constantly monitors the battery voltage of each battery cell forming the secondary battery 21.
【００３１】２３は電圧測定部２２で測定した電池電圧
を予め設定された過充電保護設定電圧と比較して二次電
池２１の過充電状態を検出する過充電検出部であり、電
池の充電容量が解放電池電圧にほぼ比例するリチウムイ
オン二次電池の特徴を利用して、充電により電池電圧が
低下し二次電池２１が過剰に充電されると判断したとき
過充電検出信号を出力する。Reference numeral 23 is an overcharge detection unit for comparing the battery voltage measured by the voltage measurement unit 22 with a preset overcharge protection set voltage to detect the overcharge state of the secondary battery 21, and the charge capacity of the battery. Using the characteristic of the lithium-ion secondary battery that is substantially proportional to the released battery voltage, the overcharge detection signal is output when it is determined that the battery voltage is lowered by charging and the secondary battery 21 is overcharged.
【００３２】この際の充電電圧と過充電保護設定電圧と
の関係を図６に示している。図６に於いて、Ｃv は二次
電池２１の充電電圧、ＶＳ1 はこの発明の実施例で対象
とする過充電保護設定電圧、ＶＳ2 は正常時に於ける定
電圧充電設定電圧（定電流充電から定電圧充電へ移行す
るための切換設定電圧）である。FIG. 6 shows the relationship between the charging voltage and the overcharge protection set voltage at this time. In FIG. 6, Cv is the charging voltage of the secondary battery 21, VS1 is the overcharge protection set voltage targeted in the embodiment of the present invention, and VS2 is the constant voltage charge set voltage in a normal state (constant from constant current charge). It is a switching set voltage for shifting to voltage charging).
【００３３】２４は過充電検出部２３の検出情報を電池
パック２０の外部へ出力する、過充電検出信号出力回路
である。上記構成に於いて、電圧測定部２２は、内蔵二
次電池２１の電池電圧を常時観測し、その測定電圧を過
充電検出部２３に供給する。An overcharge detection signal output circuit 24 outputs the detection information of the overcharge detection unit 23 to the outside of the battery pack 20. In the above configuration, the voltage measuring unit 22 constantly observes the battery voltage of the built-in secondary battery 21 and supplies the measured voltage to the overcharge detecting unit 23.
【００３４】過充電検出部２３は、電圧測定部２２で測
定した電池電圧を予め設定された過充電保護設定電圧と
比較し、電圧測定部２２で測定した電池電圧が過充電保
護設定電圧より上昇して、二次電池２１が過充電状態に
至ったことを検出すると、二次電池２１が過充電になっ
たことを示す過充電検出信号を過充電検出信号出力回路
２４を介し、即時にパック外へ出力する。The overcharge detection unit 23 compares the battery voltage measured by the voltage measurement unit 22 with a preset overcharge protection set voltage, and the battery voltage measured by the voltage measurement unit 22 rises above the overcharge protection set voltage. Then, when it is detected that the secondary battery 21 has reached an overcharged state, an overcharge detection signal indicating that the secondary battery 21 has been overcharged is immediately sent to the pack via the overcharge detection signal output circuit 24. Output to outside.
【００３５】即ち、過充電検出部２３は、電池の充電容
量が解放電池電圧にほぼ比例するリチウムイオン二次電
池の特徴を利用し、充電の進行に伴い二次電池２１の電
池電圧が上昇して二次電池２１が過剰に充電されると判
断されたとき、過充電検出信号を過充電検出信号出力回
路２４に出力し、二次電池２１が過充電状態に至ったこ
とを電池パック外部に知らせる。That is, the overcharge detection unit 23 utilizes the characteristic of the lithium ion secondary battery in which the charge capacity of the battery is almost proportional to the released battery voltage, and the battery voltage of the secondary battery 21 increases as the charging progresses. When it is determined that the secondary battery 21 is overcharged, an overcharge detection signal is output to the overcharge detection signal output circuit 24 to inform the outside of the battery pack that the secondary battery 21 has reached the overcharged state. Inform.
【００３６】この電池パック２０を動作用電源とする機
器、例えばパーソナルコンピュータは、電池パック２０
より過充電検出信号を受けると、使用電池パックが過充
電状態になったこと（又は電源異常が生じたこと）を表
示器又は音声等により使用者に知らせるとともに、所定
の終了処理を実行し、処理を正常終了させて電池パック
２０の充電路を遮断する等、予め定められたシーケンス
に従う終了処理を行なう。A device that uses the battery pack 20 as an operating power source, such as a personal computer, is a battery pack 20.
Upon receiving an overcharge detection signal from the battery pack, the user is informed that the battery pack being used is overcharged (or an abnormality in the power supply has occurred) by means of a display or voice, and a predetermined termination process is executed. A termination process is performed according to a predetermined sequence, such as normal termination of the process and interruption of the charging path of the battery pack 20.
【００３７】このように、電池パック２０に、内蔵二次
電池２１が過充電状態となったとき、その状態を即時に
パック外へ出力する機能回路を設けたことにより、電池
パック２０により動作している機器を常に正常終了で
き、機器の状態を正常に保つことができるとともに、内
蔵二次電池２１の過充電保護が行なえ、電池の寿命劣
化、異常加熱、破壊等を防止できる。As described above, when the built-in secondary battery 21 is overcharged, the battery pack 20 is provided with a functional circuit that immediately outputs the state to the outside of the pack, so that the battery pack 20 operates. It is possible to normally terminate the installed device, keep the device in a normal state, protect the built-in secondary battery 21 from overcharge, and prevent deterioration of the battery life, abnormal heating, destruction, and the like.
【００３８】又、電池パック２０内には、内蔵保護回路
として、二次電池２１の過充電状態を検出する回路のみ
が設けられる構成であることから、内蔵保護回路の部品
点数を削減でき電池パックの容量を小さくできるととも
に、低コスト化、及びメンテナンスの容易化が図れる。Further, since only the circuit for detecting the overcharged state of the secondary battery 21 is provided as the built-in protection circuit in the battery pack 20, the number of parts of the built-in protection circuit can be reduced. The capacity can be reduced, the cost can be reduced, and the maintenance can be facilitated.
【００３９】図３は本発明の第３実施例の回路構成を示
すブロック図である。図３に於いて、３０は過放電保護
を必要とする、例えばリチウムイオン二次電池を内蔵し
た電池パックであり、３１は電池パック３０に内蔵され
た二次電池である。３２は二次電池３１の電池電圧を監
視する電圧測定部であり、二次電池３１を構成する電池
セル各々の電池電圧を常時監視する。FIG. 3 is a block diagram showing the circuit configuration of the third embodiment of the present invention. In FIG. 3, reference numeral 30 is a battery pack that requires over-discharge protection, for example, a lithium ion secondary battery is built in, and 31 is a secondary battery built in the battery pack 30. A voltage measuring unit 32 monitors the battery voltage of the secondary battery 31, and constantly monitors the battery voltage of each battery cell forming the secondary battery 31.
【００４０】３３は電圧測定部３２で測定した電池電圧
を予め設定された過放電保護設定電圧（図７のＶＳ4 参
照）と比較して二次電池３１の過放電状態を検出する過
放電検出部であり、電池の残存容量が解放電池電圧にほ
ぼ比例するリチウムイオン二次電池の特徴を利用して、
放電により電池電圧が低下し二次電池３１が過剰に放電
されると判断したとき過放電検出信号を出力する。ここ
では所定の時間差（例えば500ms ）をもって２種の過放
電検出信号（c1，c2）を出力するもので、過放電検出信
号（c1）を出力した後に過放電検出信号（c2）を出力す
る。Reference numeral 33 is an over-discharge detector for detecting the over-discharge state of the secondary battery 31 by comparing the battery voltage measured by the voltage measuring unit 32 with a preset over-discharge protection setting voltage (see VS4 in FIG. 7). And using the characteristics of the lithium-ion secondary battery in which the remaining capacity of the battery is almost proportional to the released battery voltage,
When it is determined that the secondary battery 31 is excessively discharged due to a decrease in battery voltage due to discharging, an overdischarge detection signal is output. Here, two kinds of overdischarge detection signals (c1, c2) are output with a predetermined time difference (for example, 500 ms), and the overdischarge detection signal (c2) is output after the overdischarge detection signal (c1) is output.
【００４１】３４は電池パック３０の外部に設けられ
た、放電路を遮断制御する放電停止スイッチであり、過
放電検出部３３より出力される過放電検出信号（c2）に
よりスイッチオフ制御される。Reference numeral 34 is a discharge stop switch provided outside the battery pack 30 for cutting off the discharge path, and is switch-off controlled by an overdischarge detection signal (c2) output from the overdischarge detection unit 33.
【００４２】３５は過放電検出部３３より出力される過
放電検出信号（c1，c2）を電池パック３０の外部へ出力
する、過放電検出信号出力回路である。上記構成に於い
て、電圧測定部３２は、内蔵二次電池３１の電池電圧を
常時観測し、その測定電圧を過放電検出部３３に供給す
る。Reference numeral 35 is an overdischarge detection signal output circuit for outputting the overdischarge detection signals (c1, c2) output from the overdischarge detection section 33 to the outside of the battery pack 30. In the above configuration, the voltage measurement unit 32 constantly observes the battery voltage of the built-in secondary battery 31 and supplies the measured voltage to the overdischarge detection unit 33.
【００４３】過放電検出部３３は、電圧測定部３２で測
定した電池電圧を予め設定された過放電保護設定電圧
（図７のＶＳ4 参照）と比較し、電圧測定部３２で測定
した電池電圧が過放電保護設定電圧より低下して、二次
電池３１が過放電状態に至ったことを検出すると、二次
電池３１が過放電になったことを示す過放電検出信号
（c1，c2）を過放電検出信号出力回路３５を介して、即
時にパック外へ出力する。The over-discharge detection unit 33 compares the battery voltage measured by the voltage measurement unit 32 with a preset over-discharge protection set voltage (see VS4 in FIG. 7), and the battery voltage measured by the voltage measurement unit 32 is When it is detected that the secondary battery 31 is over-discharged by falling below the over-discharge protection set voltage, an over-discharge detection signal (c1, c2) indicating that the secondary battery 31 is over-discharged is output. Immediately output to the outside of the pack through the discharge detection signal output circuit 35.
【００４４】即ち、過放電検出部３３は、電池の残存容
量が解放電池電圧にほぼ比例するリチウムイオン二次電
池の特徴を利用し、放電の進行に伴い二次電池３１の電
池電圧が低下して二次電池３１が過剰に放電されると判
断されたとき、過放電検出信号（c1，c2）を過放電検出
信号出力回路３５に出力し、二次電池３１が過放電状態
に至ったことを電池パック外部に知らせる。That is, the over-discharge detection unit 33 utilizes the characteristic of the lithium-ion secondary battery in which the remaining capacity of the battery is almost proportional to the released battery voltage, and the battery voltage of the secondary battery 31 decreases as the discharge progresses. When it is determined that the secondary battery 31 is excessively discharged, the over-discharge detection signal (c1, c2) is output to the over-discharge detection signal output circuit 35, and the secondary battery 31 reaches the over-discharge state. To the outside of the battery pack.
【００４５】上記過放電検出部３３より出力される過放
電検出信号（c1，c2）のうち、先に出力される過放電検
出信号（c1）は、この電池パック３０を使用している、
例えばパーソナルコンピュータ等の機器に供給され、所
定の時間差（例えば500ms ）をもって後から出力される
過放電検出信号（c2）は電池パック３０外部の放電路に
介在された放電停止スイッチ３４に供給される。Among the over-discharge detection signals (c1, c2) output from the over-discharge detection unit 33, the over-discharge detection signal (c1) output first uses the battery pack 30.
For example, the over-discharge detection signal (c2) that is supplied to a device such as a personal computer and is output later with a predetermined time difference (eg, 500 ms) is supplied to the discharge stop switch 34 interposed in the discharge path outside the battery pack 30. .
【００４６】電池パック３０を動作用電源とするパーソ
ナルコンピュータ等の機器は、電池パック３０より過放
電検出信号（c1）を受けると、使用電池パックが過放電
状態になったことを認識して、その旨を表示器又は音声
等により使用者に知らせるとともに、所定の終了処理を
実行して、処理を正常終了させる。Upon receiving an overdischarge detection signal (c1) from the battery pack 30, a device such as a personal computer which uses the battery pack 30 as a power source for operation recognizes that the used battery pack is in an overdischarged state, To that effect, the user is notified by a display or voice, and a predetermined ending process is executed to normally end the process.
【００４７】この正常終了処理の所用時間だけ遅らせて
電池パック３０より過放電検出信号（c2）が出力され放
電停止スイッチ３４に供給される。又、放電停止スイッ
チ３４は電池パック３０より過放電検出信号（c2）を受
けると、電池パック３０の放電路を断ち、放電を停止す
る。The battery pack 30 outputs the over-discharge detection signal (c2) after a delay of the time required for the normal termination process, and the signal is supplied to the discharge stop switch 34. When the discharge stop switch 34 receives the overdischarge detection signal (c2) from the battery pack 30, the discharge path of the battery pack 30 is cut off and the discharge is stopped.
【００４８】このように、電池パック３０の内部に、内
蔵二次電池３１が過放電状態となったとき、その状態を
即時にパック外へ出力する機能回路を設け、電池パック
３０の外部に、過放電保護を実現する放電停止スイッチ
３４を設けたことにより、電池パック３０により動作し
ている機器を常に正常終了でき、機器の状態を正常に保
つことができるとともに、内蔵二次電池３１の過放電保
護が行なえ電池寿命劣化の防止等が図れる。As described above, when the built-in secondary battery 31 is in the over-discharged state, a functional circuit that immediately outputs the state to the outside of the pack is provided inside the battery pack 30, and outside the battery pack 30, By providing the discharge stop switch 34 that realizes over-discharge protection, the device operating by the battery pack 30 can always be normally terminated, the state of the device can be kept normal, and the internal secondary battery 31 The discharge can be protected and the deterioration of the battery life can be prevented.
【００４９】又、電池パック３０内には、内蔵保護回路
として、二次電池３１の過放電状態を検出する回路のみ
が設けられる構成であることから、内蔵保護回路の部品
点数を削減でき電池パックの容量を小さくできるととも
に、低コスト化、及びメンテナンスの容易化が図れる。Further, since only the circuit for detecting the over-discharged state of the secondary battery 31 is provided as the built-in protection circuit in the battery pack 30, the number of parts of the built-in protection circuit can be reduced. The capacity can be reduced, the cost can be reduced, and the maintenance can be facilitated.
【００５０】図４は本発明の第４実施例の回路構成を示
すブロック図である。図４に於いて、４０は過充電保護
を必要とする、例えばリチウムイオン二次電池を内蔵し
た電池パックであり、４１は電池パック４０に内蔵され
た二次電池である。４２は二次電池４１の電池電圧を監
視する電圧測定部であり、二次電池４１を構成する電池
セル各々の電池電圧を常時監視する。FIG. 4 is a block diagram showing the circuit configuration of the fourth embodiment of the present invention. In FIG. 4, reference numeral 40 is a battery pack that requires overcharge protection, for example, a lithium ion secondary battery is built in, and 41 is a secondary battery built in the battery pack 40. A voltage measuring unit 42 monitors the battery voltage of the secondary battery 41, and constantly monitors the battery voltage of each battery cell forming the secondary battery 41.
【００５１】４３は電圧測定部４２で測定した電池電圧
を予め設定された過充電保護設定電圧（図６のＶＳ1 参
照）と比較して二次電池４１の過充電状態を検出する過
充電検出部であり、電池の充電容量が解放電池電圧にほ
ぼ比例するリチウムイオン二次電池の特徴を利用して、
充電により電池電圧が上昇し二次電池４１が過剰に充電
されると判断したとき過充電検出信号を出力する。ここ
では所定の時間差（例えば500ms ）をもって２種の過充
電検出信号（ca，cb）を出力するもので、過充電検出信
号（ca）を出力した後に過充電検出信号（cb）を出力す
る。An overcharge detector 43 detects the overcharge state of the secondary battery 41 by comparing the battery voltage measured by the voltage measurer 42 with a preset overcharge protection set voltage (see VS1 in FIG. 6). And using the characteristics of the lithium-ion secondary battery in which the charge capacity of the battery is almost proportional to the released battery voltage,
When it is determined that the battery voltage rises due to charging and the secondary battery 41 is overcharged, an overcharge detection signal is output. Here, two types of overcharge detection signals (ca, cb) are output with a predetermined time difference (for example, 500 ms), and the overcharge detection signal (ca) is output and then the overcharge detection signal (cb) is output.
【００５２】４４は電池パック４０の外部に設けられ
た、充電路を遮断制御する充電停止スイッチであり、過
充電検出部４３より出力される過充電検出信号（cb）に
よりスイッチオフ制御される。Reference numeral 44 denotes a charge stop switch provided outside the battery pack 40 for controlling the cutoff of the charging path, and is switch-off controlled by an overcharge detection signal (cb) output from the overcharge detection unit 43.
【００５３】４５は過充電検出部４３より出力される過
充電検出信号（ca，cb）を電池パック４０の外部へ出力
する、過充電検出信号出力回路である。上記構成に於い
て、電圧測定部４２は、内蔵二次電池４１の電池電圧を
常時観測し、その測定電圧を過充電検出部４３に供給す
る。An overcharge detection signal output circuit 45 outputs the overcharge detection signals (ca, cb) output from the overcharge detection unit 43 to the outside of the battery pack 40. In the above configuration, the voltage measuring unit 42 constantly observes the battery voltage of the built-in secondary battery 41 and supplies the measured voltage to the overcharge detecting unit 43.
【００５４】過充電検出部４３は、電圧測定部４２で測
定した電池電圧を予め設定された過充電保護設定電圧
（図６のＶＳ1 参照）と比較し、電圧測定部４２で測定
した電池電圧が過充電保護設定電圧より上昇して、二次
電池４１が過充電状態に至ったことを検出すると、二次
電池４１が過充電になったことを示す過充電検出信号
（ca，cb）を過充電検出信号出力回路４５を介して、即
時にパック外へ出力する。The overcharge detection unit 43 compares the battery voltage measured by the voltage measurement unit 42 with a preset overcharge protection set voltage (see VS1 in FIG. 6), and the battery voltage measured by the voltage measurement unit 42 is When it is detected that the secondary battery 41 has reached an overcharged state by rising above the overcharge protection set voltage, an overcharge detection signal (ca, cb) indicating that the secondary battery 41 is overcharged is overcharged. Immediately output to the outside of the pack via the charge detection signal output circuit 45.
【００５５】即ち、過充電検出部４３は、電池の残存容
量が解放電池電圧にほぼ比例するリチウムイオン二次電
池の特徴を利用し、充電の進行に伴い二次電池４１の電
池電圧が低下して二次電池４１が過剰に充電されると判
断されたとき、過充電検出信号（ca，cb）を過充電検出
信号出力回路４５に出力し、二次電池４１が過充電状態
に達したことを電池パック外部に知らせる。That is, the overcharge detection unit 43 utilizes the characteristic of the lithium ion secondary battery in which the remaining capacity of the battery is substantially proportional to the released battery voltage, and the battery voltage of the secondary battery 41 decreases as the charging progresses. When it is determined that the secondary battery 41 is excessively charged, the overcharge detection signal (ca, cb) is output to the overcharge detection signal output circuit 45, and the secondary battery 41 reaches the overcharge state. To the outside of the battery pack.
【００５６】上記過充電検出部４３より出力される過充
電検出信号（ca，cb）のうち、先に出力される過充電検
出信号（ca）は、この電池パック４０を使用している、
例えばパーソナルコンピュータ等の機器に供給され、所
定の時間差（例えば500ms ）をもって後から出力される
過充電検出信号（cb）は電池パック４０外部の充電路に
介在された充電停止スイッチ４４に供給される。Among the overcharge detection signals (ca, cb) output from the overcharge detection section 43, the overcharge detection signal (ca) output first uses this battery pack 40.
For example, an overcharge detection signal (cb) which is supplied to a device such as a personal computer and is output later with a predetermined time difference (for example, 500 ms) is supplied to the charge stop switch 44 interposed in the charging path outside the battery pack 40. .
【００５７】電池パック４０を動作用電源とするパーソ
ナルコンピュータ等の機器は、電池パック４０より過充
電検出信号（ca）を受けると、使用電池パックが過充電
状態になったことを認識して、その旨を表示器又は音声
等により使用者に知らせるとともに、所定の終了処理を
実行して、処理を正常終了させる。Upon receiving an overcharge detection signal (ca) from the battery pack 40, a device such as a personal computer which uses the battery pack 40 as a power source for operation recognizes that the used battery pack is in an overcharged state, To that effect, the user is notified by a display or voice, and a predetermined ending process is executed to normally end the process.
【００５８】この正常終了処理の所用時間だけ遅らせて
電池パック４０より過充電検出信号（cb）が出力され充
電停止スイッチ４４に供給される。又、充電停止スイッ
チ４４は電池パック４０より過充電検出信号（cb）を受
けると、電池パック４０の充電路を断ち、充電を停止す
る。An overcharge detection signal (cb) is output from the battery pack 40 after a delay of the time required for the normal termination process and is supplied to the charge stop switch 44. Further, when the charging stop switch 44 receives the overcharge detection signal (cb) from the battery pack 40, it disconnects the charging path of the battery pack 40 and stops charging.
【００５９】このように、電池パック４０の内部に、内
蔵二次電池４１が過充電状態となったとき、その状態を
即時にパック外へ出力する機能回路を設け、電池パック
４０の外部に、過充電保護を実現する充電停止スイッチ
４４を設けたことにより、電池パック４０により動作し
ている機器を常に正常終了でき、機器の状態を正常に保
つことができるとともに、内蔵二次電池４１の過充電保
護が行なえ、電池の寿命劣化、異常加熱、破壊等を防止
できる。As described above, when the built-in secondary battery 41 is overcharged, a functional circuit that immediately outputs the state to the outside of the pack is provided inside the battery pack 40, and outside the battery pack 40, By providing the charge stop switch 44 that realizes overcharge protection, the device operating by the battery pack 40 can always be terminated normally, and the condition of the device can be kept normal. It is possible to protect the battery from charge and prevent deterioration of battery life, abnormal heating, and damage.
【００６０】又、電池パック４０内には、内蔵保護回路
として、二次電池４１の過充電状態を検出する回路のみ
が設けられる構成であることから、内蔵保護回路の部品
点数を削減でき電池パックの容量を小さくできるととも
に、低コスト化、及びメンテナンスの容易化が図れる。Further, since only the circuit for detecting the overcharged state of the secondary battery 41 is provided as the built-in protection circuit in the battery pack 40, the number of parts of the built-in protection circuit can be reduced. The capacity can be reduced, the cost can be reduced, and the maintenance can be facilitated.
【００６１】図５は本発明の第５実施例の回路構成を示
すブロック図である。図５に於いて、５０は過充電保護
を必要とする、例えばリチウムイオン二次電池を内蔵し
た電池パックであり、５１は電池パック５０に内蔵され
た二次電池である。５２は二次電池５１の電池電圧を監
視する電圧測定部であり、二次電池５１を構成する電池
セル各々の電池電圧を常時監視する。FIG. 5 is a block diagram showing the circuit configuration of the fifth embodiment of the present invention. In FIG. 5, reference numeral 50 is a battery pack that requires overcharge protection, for example, a lithium ion secondary battery is built in, and 51 is a secondary battery built in the battery pack 50. Reference numeral 52 denotes a voltage measuring unit that monitors the battery voltage of the secondary battery 51, and constantly monitors the battery voltage of each battery cell that constitutes the secondary battery 51.
【００６２】５３は電圧測定部５２で測定した電池電圧
を予め設定された過充電・過放電保護設定電圧（図６の
ＶＳ1 、図７のＶＳ4 参照）と比較して二次電池５１の
過充電・過放電状態を検出する過充電・過放電検出部で
あり、電池の充電及び残存容量が解放電池電圧にほぼ比
例するリチウムイオン二次電池の特徴を利用して、充電
により電池電圧が上昇し二次電池５１が過剰に充電され
ると判断したとき過充電検出信号を出力し、放電により
電池電圧が下降し二次電池５１が過剰に放電されると判
断したとき過放電検出信号を出力する。Reference numeral 53 compares the battery voltage measured by the voltage measuring unit 52 with a preset overcharge / overdischarge protection set voltage (see VS1 in FIG. 6 and VS4 in FIG. 7) to overcharge the secondary battery 51.・ It is an overcharge / overdischarge detection unit that detects the state of overdischarge, and the battery voltage rises due to charging by utilizing the characteristics of the lithium-ion secondary battery in which the battery charge and remaining capacity are almost proportional to the released battery voltage. An overcharge detection signal is output when it is determined that the secondary battery 51 is excessively charged, and an overdischarge detection signal is output when it is determined that the secondary battery 51 is excessively discharged due to a decrease in battery voltage due to discharge. .
【００６３】５４は過充電・過放電検出部５３から出力
される過充電検出時の過充電検出信号によりスイッチオ
ン制御される電流制限スイッチであり、発熱素子５５の
電流路に介在される。Reference numeral 54 is a current limiting switch which is switch-on controlled by an overcharge detection signal at the time of overcharge detection output from the overcharge / overdischarge detection section 53, and is interposed in the current path of the heating element 55.
【００６４】５５は電流制限スイッチ５４を介して二次
電池５１の電力が供給される発熱素子であり、電流制限
スイッチ５４がオンすると、二次電池５１の電力により
発熱して、近傍に配置された溶断部を溶断する。Reference numeral 55 is a heating element to which the power of the secondary battery 51 is supplied via the current limiting switch 54. When the current limiting switch 54 is turned on, heat is generated by the power of the secondary battery 51 and is arranged in the vicinity. The fusing part is blown.
【００６５】５６は回路的には二次電池５１の充電路に
介在され、機構的には発熱素子５５の近傍に設けられ
て、発熱素子５５の発熱により溶断される溶断部であ
り、この溶断部５６の溶断により二次電池５１の充電路
が切断される。Reference numeral 56 is a fusing portion which is provided in the vicinity of the heat generating element 55 mechanically interposed in the charging path of the secondary battery 51 in terms of a circuit and blown by the heat generated by the heat generating element 55. Due to the melting of the portion 56, the charging path of the secondary battery 51 is cut.
【００６６】５７は過充電・過放電検出部５３から出力
される過充電検出信号、過放電検出信号等を電池パック
の外部に出力するための過充電・過放電検出信号出力回
路（以下単に検出信号出力回路と称す）である。Reference numeral 57 denotes an overcharge / overdischarge detection signal output circuit (hereinafter simply referred to as a detection circuit) for outputting an overcharge detection signal, an overdischarge detection signal, etc. output from the overcharge / overdischarge detection section 53 to the outside of the battery pack. It is called a signal output circuit).
【００６７】上記構成に於いて、電圧測定部５２は、内
蔵二次電池５１の電池電圧を常時観測し、その測定電圧
を過充電・過放電検出部５３に供給する。過充電・過放
電検出部５３は、電圧測定部５２で測定した電池電圧を
予め設定された過充電保護設定電圧（図６のＶＳ1 参
照）及び過放電保護設定電圧（図７のＶＳ4 参照）と比
較し、電圧測定部５２で測定した電池電圧が過充電保護
設定電圧より上昇して、二次電池５１が過充電状態に達
したことを検出すると、二次電池５１が過充電になった
ことを示す過充電検出信号を検出信号出力回路５７を介
して、即時にパック外へ出力し、又、電圧測定部５２で
測定した電池電圧が過放電保護設定電圧より下降して、
二次電池５１が過放電状態に至ったことを検出すると、
二次電池５１が過放電になったことを示す過放電検出信
号を検出信号出力回路５７を介して、即時にパック外へ
出力する。In the above configuration, the voltage measuring section 52 constantly observes the battery voltage of the built-in secondary battery 51 and supplies the measured voltage to the overcharge / overdischarge detecting section 53. The overcharge / overdischarge detection unit 53 uses the battery voltage measured by the voltage measurement unit 52 as a preset overcharge protection set voltage (see VS1 in FIG. 6) and an overdischarge protection set voltage (see VS4 in FIG. 7). In comparison, when the battery voltage measured by the voltage measuring unit 52 rises above the overcharge protection set voltage and the secondary battery 51 reaches the overcharge state, the secondary battery 51 is overcharged. Is output to the outside of the pack immediately through the detection signal output circuit 57, and the battery voltage measured by the voltage measuring unit 52 falls below the overdischarge protection set voltage.
When it is detected that the secondary battery 51 has reached an overdischarge state,
An overdischarge detection signal indicating that the secondary battery 51 is overdischarged is immediately output to the outside of the pack via the detection signal output circuit 57.
【００６８】過充電・過放電検出部５３が、二次電池５
１の過充電を検出して、過充電検出信号を出力すると、
この過充電検出信号により、電流制限スイッチ５４がオ
ンして、発熱素子５５に二次電池５１の電力が供給さ
れ、発熱素子５５が発熱して、近傍に配置された溶断部
５６が溶断される。The overcharge / overdischarge detection unit 53 is used for the secondary battery 5
When the overcharge of 1 is detected and the overcharge detection signal is output,
Due to this overcharge detection signal, the current limiting switch 54 is turned on, the electric power of the secondary battery 51 is supplied to the heating element 55, the heating element 55 generates heat, and the fusing part 56 arranged in the vicinity is fused. .
【００６９】この溶断部５６は、通常の状態（非溶断状
態）では、二次電池５１の充電路に介在されて、電池パ
ック内部の充電電流路を形成しているが、溶断により電
池パック内部の充電路を断つ（切断する）。In a normal state (non-fusing state), the fusing part 56 is interposed in the charging path of the secondary battery 51 to form a charging current path inside the battery pack. Disconnect (disconnect) the charging path of.
【００７０】このように、内蔵二次電池の過放電、過充
電等による電池異常が発生した際に、その状態を即時に
外部へ通知するとともに、過充電を検出したとき、パッ
ク内部で充電路を回路遮断して、電池パック自身が内蔵
二次電池の過充電保護を行なう構成としたことにより、
電池パック５０により動作している機器を常に正常終了
でき、機器の状態を正常に保つことができるとともに、
内蔵二次電池５１の過充電保護が行なえ、電池の寿命劣
化、異常加熱、破壊等を防止できる。As described above, when a battery abnormality occurs due to over-discharge, over-charge, etc. of the built-in secondary battery, the state is immediately notified to the outside, and when over-charge is detected, the charging path inside the pack is detected. The circuit is cut off and the battery pack itself protects the built-in secondary battery from overcharge.
With the battery pack 50, the operating device can always be terminated normally, and the state of the device can be kept normal.
Overcharge protection of the built-in secondary battery 51 can be performed, and deterioration of battery life, abnormal heating, destruction, etc. can be prevented.
【００７１】[0071]
【発明の効果】以上詳記したように本発明によれば、過
放電保護を必要とする二次電池を内蔵した電池パックに
於いて、二次電池の電池電圧を監視する電圧測定部と、
その測定電池電圧を予め設定された過放電保護設定電圧
と比較して二次電池の過放電状態を検出する検出部と、
この検出情報を外部へ出力する回路とを具備し、内蔵二
次電池が過放電状態となった際に、その異常を即時にパ
ック外へ出力する構成としたことにより、当該電池パッ
クからの電力供給で動作している機器を常に正常終了さ
せることができるとともに、過放電による電池寿命劣化
を防止することができる。又、電池パックの内部回路を
簡素化して、メンテナンスの容易化、コストの低減化、
小形化を図ることができる。As described above in detail, according to the present invention, in a battery pack containing a secondary battery which requires over-discharge protection, a voltage measuring unit for monitoring the battery voltage of the secondary battery,
A detection unit that detects the overdischarge state of the secondary battery by comparing the measured battery voltage with a preset overdischarge protection setting voltage,
It is equipped with a circuit that outputs this detection information to the outside, and when the built-in secondary battery is over-discharged, the abnormality is immediately output to the outside of the pack. It is possible to always normally terminate the device that is operating by the supply and prevent deterioration of the battery life due to over-discharge. In addition, the internal circuit of the battery pack is simplified to facilitate maintenance, reduce costs,
It can be miniaturized.
【００７２】又、本発明は、過充電保護を必要とする二
次電池を内蔵した電池パックに於いて、二次電池を構成
する電池セル各々の電池電圧を監視する電圧測定部と、
その測定電池電圧を予め設定された過充電保護設定電圧
と比較して二次電池の過充電状態を検出する検出部と、
この検出情報を外部へ出力する回路とを具備して、内蔵
二次電池が過充電状態となった際に、その異常を即時に
パック外へ出力する構成としたことにより、当該電池パ
ックからの電力供給で動作している機器を常に正常終了
させることができるとともに、過充電による内蔵二次電
池の寿命劣化、異常加熱、破壊等を防止することができ
る。又、電池パックの内部回路を簡素化して、メンテナ
ンスの容易化、コストの低減化、小形化を図ることがで
きる。Further, according to the present invention, in a battery pack incorporating a secondary battery requiring overcharge protection, a voltage measuring unit for monitoring the battery voltage of each battery cell constituting the secondary battery,
A detection unit that detects the overcharged state of the secondary battery by comparing the measured battery voltage with a preset overcharge protection set voltage,
A circuit for outputting this detection information to the outside is provided, and when the built-in secondary battery is overcharged, the abnormality is immediately output to the outside of the pack. It is possible to always normally terminate the device operating with the power supply, and prevent deterioration of the life of the built-in secondary battery due to overcharging, abnormal heating, destruction, and the like. In addition, the internal circuit of the battery pack can be simplified to facilitate maintenance, reduce cost, and reduce size.
【００７３】又、本発明は、過放電保護が必要な二次電
池を内蔵した電池パックを動作用電源として用いるシス
テムに於いて、電池パックの内部に、二次電池を構成す
る電池セル各々の電池電圧を測定する電圧測定部と、こ
の測定電圧を過放電保護設定電圧と比較し二次電池の過
放電状態を検出して外部へ出力する検出部とを設け、電
池パックの外部に、上記検出信号をもとに二次電池の放
電路を遮断制御するスイッチを設けた構成としたことに
より、電池パック内蔵回路を簡素化して二次電池の過放
電保護機構を実現するとともに、電池パックからの電力
供給で動作している機器が常に正常終了できる。Further, the present invention is a system in which a battery pack containing a secondary battery requiring over-discharge protection is used as a power source for operation. In the system, each battery cell constituting the secondary battery is provided inside the battery pack. A voltage measuring unit that measures the battery voltage, and a detecting unit that compares the measured voltage with the overdischarge protection set voltage to detect the overdischarged state of the secondary battery and outputs the outside, are provided outside the battery pack. A switch that cuts off the discharge path of the secondary battery based on the detection signal is provided to simplify the internal circuit of the battery pack and realize an overdischarge protection mechanism for the secondary battery. Devices that are operating with the power supply of can always end normally.
【００７４】又、本発明は、過充電保護が必要な二次電
池を内蔵した電池パックを動作用電源として用いるシス
テムに於いて、電池パックの内部に、二次電池を構成す
る電池セル各々の電池電圧を測定する電圧測定部と、こ
の測定電圧を過充電保護設定電圧と比較し二次電池の過
充電状態を検出して外部へ出力する検出部とを設け、電
池パックの外部に、上記検出信号をもとに二次電池の充
電路を遮断制御するスイッチを設けた構成としたことに
より、電池パック内蔵回路を簡素化して二次電池の過充
電保護機構を実現でき、過充電による内蔵二次電池の寿
命劣化、異常加熱、破壊等を防止することができるとと
もに、電池パックからの電力供給で動作している機器が
常に正常終了できる。Further, the present invention is a system in which a battery pack containing a secondary battery requiring overcharge protection is used as an operating power source, and each battery cell constituting the secondary battery is provided inside the battery pack. A voltage measuring unit that measures the battery voltage, and a detecting unit that compares the measured voltage with the overcharge protection set voltage to detect the overcharged state of the secondary battery and output the outside to the outside of the battery pack. By configuring a switch that cuts off the charging path of the secondary battery based on the detection signal, the battery pack built-in circuit can be simplified and a secondary battery overcharge protection mechanism can be realized. It is possible to prevent the life of the secondary battery from deteriorating, abnormal heating, breakage, and the like, and at the same time, the device operating by the power supply from the battery pack can always end normally.
【００７５】又、本発明は、過充電保護を必要とする二
次電池を内蔵した電池パックに於いて、二次電池を構成
する電池セル各々の電池電圧を監視する電圧測定部と、
この測定電池電圧を予め設定された過充電保護設定電圧
と比較して二次電池の過充電状態を検出する検出部と、
この検出情報を外部へ出力する回路と、二次電池の充電
路に介在された溶断部と、この溶断部を上記検出情報に
より溶断する発熱素子５５とを備えた構成としたことに
より、内蔵二次電池の過放電、過充電等による電池異常
が発生した際に、その状態を即時に外部へ通知して、電
池パックからの電力供給で動作している機器が常に正常
終了できるようにするとともに、電池パック自身がパッ
ク内部で充放電路を回路遮断して、外部の機器制御を必
要とせずに内蔵二次電池の過放電、過充電保護を行なう
ことができる。Further, according to the present invention, in a battery pack incorporating a secondary battery requiring overcharge protection, a voltage measuring unit for monitoring the battery voltage of each battery cell constituting the secondary battery,
A detection unit that detects the overcharged state of the secondary battery by comparing the measured battery voltage with a preset overcharge protection set voltage,
A circuit for outputting the detection information to the outside, a fusing part interposed in the charging path of the secondary battery, and a heating element 55 for fusing the fusing part according to the detection information are provided. When a battery abnormality occurs due to over-discharging or overcharging of the secondary battery, the state is immediately notified to the outside so that the device operating by the power supply from the battery pack can always end normally. The battery pack itself cuts off the charging / discharging path inside the pack, and can protect the built-in secondary battery from over-discharge and over-charge without requiring external device control.
【図１】本発明の第１実施例の構成を示すブロック図。FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention.
【図２】本発明の第２実施例の構成を示すブロック図。FIG. 2 is a block diagram showing the configuration of a second embodiment of the present invention.
【図３】本発明の第２実施例の構成を示すブロック図。FIG. 3 is a block diagram showing the configuration of a second embodiment of the present invention.
【図４】本発明の第４実施例の構成を示すブロック図。FIG. 4 is a block diagram showing the configuration of a fourth embodiment of the present invention.
【図５】本発明の第５実施例の構成を示すブロック図。FIG. 5 is a block diagram showing the configuration of a fifth embodiment of the present invention.
【図６】本発明の実施例による過充電保護設定電圧と充
電電圧との関係を示す図。FIG. 6 is a diagram showing a relationship between an overcharge protection set voltage and a charging voltage according to an embodiment of the present invention.
【図７】本発明の実施例による過放電保護設定電圧と放
電電圧との関係を示す図。FIG. 7 is a diagram showing a relationship between an overdischarge protection set voltage and a discharge voltage according to an embodiment of the present invention.
【図８】従来の電池パックの構成を示すブロック図。FIG. 8 is a block diagram showing a configuration of a conventional battery pack.
１０，２０，３０，４０，５０…電池パック、１１，２
１，３１，４１，５１…二次電池、１２，２２，３２，
４２，５２…電圧測定部、１３，３３…過放電検出部、
１４，３５…過放電検出信号出力回路、２３，４３…過
充電検出部、２４，４５…過充電検出信号出力回路、３
４…放電停止スイッチ、４４…充電停止スイッチ、５３
…過充電・過放電検出部（検出部）、５４…電流制限ス
イッチ、５５…発熱素子、５６…溶断部、５７…過充電
・過放電検出信号出力回路（検出信号出力回路）。10, 20, 30, 40, 50 ... Battery packs 11,2
1, 31, 41, 51 ... Secondary battery, 12, 22, 32,
42, 52 ... Voltage measurement unit, 13, 33 ... Over-discharge detection unit,
14, 35 ... Overdischarge detection signal output circuit, 23, 43 ... Overcharge detection unit, 24, 45 ... Overcharge detection signal output circuit, 3
4 ... Discharge stop switch, 44 ... Charge stop switch, 53
... overcharge / over-discharge detection section (detection section), 54 ... current limit switch, 55 ... heating element, 56 ... fusing section, 57 ... overcharge / overdischarge detection signal output circuit (detection signal output circuit).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 原島 勝 東京都青梅市新町1381番地１ 東芝コン ピュータエンジニアリング株式会社内 (72)発明者 細谷 信之 東京都青梅市新町1381番地１ 東芝コン ピュータエンジニアリング株式会社内 (72)発明者 森岡 静夫 東京都青梅市新町1381番地１ 東芝コン ピュータエンジニアリング株式会社内 (56)参考文献 特開 平７−23532（ＪＰ，Ａ) 特開 平７−105986（ＪＰ，Ａ) 国際公開94／10718（ＷＯ，Ａ１) 国際公開94／9527（ＷＯ，Ａ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 7/00 - 7/12 H02J 7/34 - 7/36 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaru Harashima 1381 Shinmachi, Ome-shi, Tokyo Inside Toshiba Computer Computer Engineering Co., Ltd. (72) Nobuyuki Hosoya 1381 Shinmachi, Ome-shi, Tokyo 1 Toshiba Computer Computer Engineering Co., Ltd. (72) Inventor Shizuo Morioka 1381-1 Shinmachi, Ome-shi, Tokyo Inside Toshiba Computer Engineering Co., Ltd. (56) Reference JP-A-7-23532 (JP, A) JP-A-7-105986 (JP, A) International publication 94/10718 (WO, A1) International publication 94/9527 (WO, A1) (58) Fields investigated (Int.Cl. 7 , DB name) H02J 7/00-7/12 H02J 7/34-7 / 36
Claims (8)
源として用いる機器に於いて、 前記機器は、 前記二次電池の放電路を遮断する放電路遮断回路を具備
し、 前記電池パックは、 前記二次電池を構成する電池セルの電池電圧と過放電保
護設定電圧とを比較して前記二次電池の過放電状態を検
出する過放電検出手段と、 前記過放電検出手段により前記二次電池の過放電状態が
検出された際に、前記機器に設けられた放電路遮断回路
へ前記放電路を遮断するための制御信号を出力する出力
手段とを具備したことを特徴とする電池パックを動作用
電源とする機器。 1. A battery pack having a built-in secondary battery is operated.
In the device used as a source, the device is provided with a discharge path interrupting circuit for interrupting a discharge path of the secondary battery
And, the battery pack, the battery voltage of the battery cells constituting the secondary battery overdischarge coercive
Protected voltage is compared to detect the over-discharged state of the secondary battery.
And the over-discharge detection means for outputting the over-discharge state of the secondary battery by the over-discharge detection means.
Discharge path cutoff circuit provided in the device when detected
To output a control signal for shutting off the discharge path
Means for operating a battery pack characterized by comprising:
Equipment to be used as a power source.
源として用いる機器に於いて、 前記機器は、 前記二次電池の充電路を遮断する充電路遮断回路を具備
し、 前記電池パックは、 前記二次電池を構成する電池セルの電池電圧と過充電保
護設定電圧とを比較して前記二次電池の過充電状態を検
出する過充電検出手段と、 前記過充電検出手段により前記二次電池の過充電状態が
検出された際に前記機器へ過充電検出信号を出力する検
出信号出力手段と、 前記過充電検出手段により前記二次電池の過充電状態が
検出された際に前記機器に設けられた過充電遮断回路へ
前記充電路を遮断するための制御信号を出力する出力手
段とを具備したことを特徴とする電池パックを動作用電
源とする機器。 2. A battery pack with a built-in secondary battery
In the device used as a source, the device is provided with a charging path interrupting circuit for interrupting a charging path of the battery
And, the battery pack, the battery voltage of the battery cells constituting the secondary battery overcharge coercive
Protected voltage is compared to detect the overcharge status of the secondary battery.
And the overcharge detection means for outputting the overcharge state of the secondary battery by the overcharge detection means.
Outputs an overcharge detection signal to the device when detected.
The output signal output means and the overcharge detection means determine whether the overcharged state of the secondary battery is
To the overcharge cutoff circuit provided in the device when detected
An output hand that outputs a control signal for shutting off the charging path
And a battery pack for operating the battery pack.
Source device.
により前記二次電池の過放電状態が検出された際に前記
機器へ過放電検出信号を出力する手段を具備する請求項
１記載の電池パックを動作用電源とする機器。 3. The battery pack includes the over-discharge detection means.
When the over-discharged state of the secondary battery is detected by
A device comprising means for outputting an overdischarge detection signal to the device.
A device that uses the battery pack described in 1 as an operating power supply.
充電路に設けられた 溶断部と、この溶断部を前記出力手
段より出力される制御信号により溶断する手段とを具備
する請求項２記載の電池パックを動作用電源とする機
器。 4. The charging path cutoff circuit is provided for the secondary battery.
The fusing part provided in the charging path and the fusing part
And means for fusing by a control signal output from the stage
A machine using the battery pack according to claim 2 as a power source for operation.
vessel.
前記機器へ出力された後に、所定時間を経て、前記充電
路を遮断するための制御信号を前記充電路遮断回路へ出
力することを特徴とする請求項２記載の電池パックを動
作用電源とする機器。 5. The output means outputs the overcharge detection signal.
After being output to the device, the charging is performed after a predetermined time.
Outputs a control signal to shut off the charging path to the charging path breaking circuit.
The battery pack according to claim 2, wherein the battery pack is operated.
A device that acts as a power source.
設けた機器に用いられる電池パックであって、 複数の電池セルで構成された二次電池と、 前記電池セルの電池電圧を監視し、前記電池電圧と前記
二次電池の過充電保護設定電圧とを比較して前記二次電
池の過充電状態を検出する手段と、 前記検出手段により前記二次電池の過充電状態が検出さ
れた際に過充電検出信号を前記機器へ出力する手段と、前記検出手段により前記二次電池の過充電状態が検出さ
れた際に前記充電路を遮断する制御信号を前記機器に設
けた前記遮断回路へ出力する手段と を具備することを特
徴とする電池パック。6. A shutoff circuit for shutting off the charging path of the battery power source.
A battery pack used for the device provided, a secondary battery composed of a plurality of battery cells, and monitoring the battery voltage of the battery cell, the battery voltage and the overcharge protection set voltage of the secondary battery and means for detecting an overcharge state of the secondary battery by comparing, and outputting an overcharge detection signal when the overcharge state of the secondary battery is detected by said detecting means to said device, said The detection means detects the overcharged state of the secondary battery.
A control signal to shut off the charging path when
And a means for outputting to the shutoff circuit .
に設けられた溶断部と、この溶断部を前記充電路を遮断
する制御信号により溶断する手段とを具備することを特
徴とする請求項６記載の電池パック。7. The shutoff circuit shuts off the fusing part provided in the charging path of the secondary battery and the fusing part from the charging path.
7. A battery pack according to claim 6, further comprising: means for fusing with a control signal for controlling .
た後、所定時間を経て前記充電路を遮断するための制御
信号を前記遮断回路へ出力する手段を具備することを特
徴とする請求項６記載の電池パック。 8. The overcharge detection signal is output to the device.
Control to shut off the charging path after a predetermined time
It is characterized by comprising means for outputting a signal to the interruption circuit.
The battery pack according to claim 6, which is a characteristic.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02932694A JP3382002B2 (en) | 1994-02-28 | 1994-02-28 | Battery pack and equipment using battery pack for operation |
| US08/853,415 US5825155A (en) | 1993-08-09 | 1997-05-09 | Battery set structure and charge/ discharge control apparatus for lithium-ion battery |
| US09/009,422 US5903131A (en) | 1993-08-09 | 1998-01-20 | Battery set structure and charge/discharge control apparatus for lithium-ion battery |
| US09/257,060 US6064179A (en) | 1993-08-09 | 1999-02-25 | Battery set structure and charge/discharge control apparatus for lithium-ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02932694A JP3382002B2 (en) | 1994-02-28 | 1994-02-28 | Battery pack and equipment using battery pack for operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07241040A JPH07241040A (en) | 1995-09-12 |
| JP3382002B2 true JP3382002B2 (en) | 2003-03-04 |
Family
ID=12273115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02932694A Expired - Fee Related JP3382002B2 (en) | 1993-08-09 | 1994-02-28 | Battery pack and equipment using battery pack for operation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3382002B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814724A (en) * | 2009-02-24 | 2010-08-25 | 三星Sdi株式会社 | Battery pack and over method thereof |
| JP2010233358A (en) * | 2009-03-27 | 2010-10-14 | Tdk-Lambda Corp | Battery protection circuit, battery protection method, power supply unit, and program |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3618472B2 (en) * | 1996-07-01 | 2005-02-09 | 富士通株式会社 | Battery unit and device using battery unit |
| JP3838722B2 (en) * | 1997-01-13 | 2006-10-25 | ローム株式会社 | Semiconductor device having control circuit with forced operation function |
| US6225842B1 (en) | 1998-01-09 | 2001-05-01 | Rohm Co., Ltd. | Control device with forced operation function and semiconductor integrated circuit device |
| JP3329284B2 (en) * | 1998-10-01 | 2002-09-30 | ミツミ電機株式会社 | Secondary battery protection circuit |
| JP2000197277A (en) * | 1998-12-25 | 2000-07-14 | Asahi Glass Co Ltd | Power supply unit with built-in electric double-layer capacitor |
| JP3988324B2 (en) * | 1999-07-02 | 2007-10-10 | 株式会社デンソー | Abnormality determination apparatus for assembled battery and abnormality determination method for assembled battery |
| DE10203512B4 (en) | 2002-01-30 | 2021-09-02 | Robert Bosch Gmbh | Hand machine tool with an electric drive, a switching device and a battery unit |
| JP4644520B2 (en) * | 2005-04-25 | 2011-03-02 | ホシザキ電機株式会社 | Automatic ice machine |
| JP2008236878A (en) * | 2007-03-19 | 2008-10-02 | Hitachi Koki Co Ltd | Charging device |
| US9537326B2 (en) * | 2009-04-16 | 2017-01-03 | Valence Technology, Inc. | Batteries, battery systems, battery submodules, battery operational methods, battery system operational methods, battery charging methods, and battery system charging methods |
| JP6277057B2 (en) * | 2014-05-13 | 2018-02-07 | デクセリアルズ株式会社 | Battery pack, battery system, and discharging method |
| JP6510674B2 (en) * | 2015-11-25 | 2019-05-08 | ヤマハ発動機株式会社 | Lithium-ion secondary battery protection circuit and battery pack |
| JP6712878B2 (en) * | 2016-03-10 | 2020-06-24 | 旭化成エレクトロニクス株式会社 | Measuring system and biological information measuring method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5796238A (en) * | 1992-10-13 | 1998-08-18 | Sony Corporation | Battery pack |
| DE69331492T2 (en) * | 1992-10-23 | 2002-08-29 | Sony Corp | BATTERY PACK |
| JP3121963B2 (en) * | 1993-06-30 | 2001-01-09 | 太陽誘電株式会社 | battery pack |
| JP3249261B2 (en) * | 1993-09-30 | 2002-01-21 | 三洋電機株式会社 | Battery pack |
-
1994
- 1994-02-28 JP JP02932694A patent/JP3382002B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814724A (en) * | 2009-02-24 | 2010-08-25 | 三星Sdi株式会社 | Battery pack and over method thereof |
| JP2010233358A (en) * | 2009-03-27 | 2010-10-14 | Tdk-Lambda Corp | Battery protection circuit, battery protection method, power supply unit, and program |
| US8461807B2 (en) | 2009-03-27 | 2013-06-11 | Tdk-Lambda Corporation | Battery protection circuit, method for protecting battery, power supply device and program |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07241040A (en) | 1995-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100485752B1 (en) | Secondary Battery Protection Device | |
| JP3382002B2 (en) | Battery pack and equipment using battery pack for operation | |
| US7898216B2 (en) | Rechargeable battery device having a protection circuit for protecting from overcharge and overdischarge | |
| JP3327790B2 (en) | Battery protection device | |
| US5705912A (en) | Circuit for preventing overdischarge of rechargeable battery pack consisting of a plurality of rechargeable batteries | |
| JP2872365B2 (en) | Rechargeable power supply | |
| JP2000133318A (en) | Battery pack | |
| KR101093982B1 (en) | Battery pack and driving method thereof | |
| JP2003142162A (en) | Battery pack | |
| JP3981893B2 (en) | Battery pack, charger, charging system, and charging method | |
| JP2003174720A (en) | Secondary battery protective circuit and protective circuit ic | |
| JP3222951B2 (en) | Secondary battery protection circuit | |
| JP2006352998A (en) | Battery pack | |
| KR20170060849A (en) | Battery Pack and Electric Vehicle Including The Same | |
| JP2001126772A (en) | Secondary battery and device for protecting the same | |
| JP2003173825A (en) | Secondary battery protector | |
| JP2001112182A (en) | Protective circuit for secondary battery | |
| KR102222119B1 (en) | battery pack | |
| JP3620796B2 (en) | Battery pack | |
| JP2002320334A (en) | Radio control battery pack | |
| WO2019053786A1 (en) | Storage battery device | |
| WO2016136499A1 (en) | Electric tool | |
| JP2004146307A (en) | Battery unit | |
| JPH1198702A (en) | Battery abnormality detector and battery pack | |
| JP3471720B2 (en) | Secondary battery protection device and battery pack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071220 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081220 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091220 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091220 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101220 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111220 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121220 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121220 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131220 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |