JP3735871B2 - Battery device - Google Patents

Battery device Download PDF

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Publication number
JP3735871B2
JP3735871B2 JP10556994A JP10556994A JP3735871B2 JP 3735871 B2 JP3735871 B2 JP 3735871B2 JP 10556994 A JP10556994 A JP 10556994A JP 10556994 A JP10556994 A JP 10556994A JP 3735871 B2 JP3735871 B2 JP 3735871B2
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Prior art keywords
battery
secondary battery
state detection
switch
charging
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JP10556994A
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JPH07296856A (en
Inventor
守雄 吉松
政雄 田辺
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Sony Corp
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Sony Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • 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

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Description

【０００１】
【産業上の利用分野】
本発明は、ビデオカメラに駆動用電源を供給するバッテリ装置に適用して好適なバッテリ装置に関する。
【０００２】
【従来の技術】
従来、ビデオカメラで撮影を行う際には、通常は二次電池が内蔵されたバッテリ装置を接続し、このバッテリ装置内の二次電池からビデオカメラの駆動用電源を供給するようにしている。
【０００３】
ところで、ビデオカメラなどに接続して使用されるバッテリ装置は、各種保護回路や状態検出回路を内蔵させて、充電状態や放電状態が異常な状態になったときに、二次電池の保護や警告などを行うようにしたものがある。
【０００４】
【発明が解決しようとする課題】
ここで、バッテリ装置に内蔵された検出回路などの内部回路は、内蔵された二次電池から供給される電源により作動する回路としてある。このため、内部回路を常時作動するようにすると、バッテリ装置内の二次電池から常時電流が流れることになり、二次電池の充電残量が減少してしまい、ビデオカメラなどの負荷装置を駆動できる時間が短くなってしまう。
【０００５】
また、バッテリ装置をビデオカメラなどの負荷装置や充電器に接続しない状態で放置しても、内蔵された二次電池から常時微小な電流（一般に内部回路の消費電力は僅か）が流れるいわゆる暗電流が発生し、長時間にわたる微小な電流の放電で二次電池が破壊されてしまう不都合があった。
【０００６】
本発明の目的は、バッテリ装置に内蔵された内部回路により暗電流が発生しないようにして、無駄な充電電流の消費やバッテリ自体の損傷を防止することにある。
【０００７】
【課題を解決するための手段】
本発明は、例えば図３に示すように、充電及び放電が可能な二次電池１５が内蔵され、負荷装置又は充電装置と接続される端子１１，１２を有するバッテリ装置において、負荷装置又は充電装置との接続を検出する接続検出手段１６と、端子１１，１２とバッテリ状態検出手段１６との間に設けられ、接続検出手段１６が接続なしを検出したとき開放する、充電時に充電装置から供給される大電流及び負荷装置へ供給する大電流よりも小さい電流である小電流用の第１のスイッチ手段１３′，１４′と、この第１のスイッチ手段１３′，１４′を介して二次電池１５と接続される、二次電池の温度を検出するバッテリ状態検出手段１８′とを備え、第２のスイッチ手段２１，２２を介して二次電池１５を端子１１，１２と接続させ、負荷装置又は充電装置に接続しない状態のとき、第１のスイッチ手段１３′，１４′が開放状態となってバッテリ状態検出手段１８が二次電池１５から切り離されるようにすると共に、負荷装置又は充電装置に接続した状態で、検出した温度が所定温度以上に上昇したとき、第２のスイッチ手段を開状態として二次電池１５と端子１１，１２との間を切り離すようにしたものである。
【００１２】
さらに上述した場合に、バッテリ状態検出手段で、二次電池の端子間電圧を検出するようにしたものである。
【００１３】
さらに上述した場合に、バッテリ状態検出手段で、二次電池の充電残量を検出し、検出した残量を表示するようにしたものである。
【００１４】
【作用】
本発明によると、バッテリ装置が負荷装置又は充電装置と接続されない状態のとき、端子とバッテリ状態検出手段が二次電池から切り離され、端子の短絡事故を防止できると共に、バッテリ状態検出手段に常時電流が流れる暗電流の発生を防止することができる。
【００１６】
さらに、上述した場合にバッテリ状態検出手段で、二次電池の端子間電圧を検出することで、充電器や負荷装置と接続された場合にだけ充電電圧や負荷電圧の異常を検出するようになる。
【００１７】
さらに、上述した場合にバッテリ状態検出手段で、二次電池の充電残量を検出し、検出した残量を表示することで、充電器や負荷装置と接続された場合にだけ二次電池の充電残量が表示されるようになる。
【００１８】
【実施例】
以下、本発明の一実施例を図１及び図２を参照して説明する。
【００１９】
図１は本例のビデオカメラ用バッテリ装置の内部の構成を示す図で、図中１０はバッテリ装置全体を示す。このバッテリ装置１０は、正極及び負極の端子１１及び１２を有し、この端子１１，１２の間にスイッチ１３，１４を介して二次電池１５が接続してある。この二次電池１５としては、ニッケル・カドミウム電池，リチウムイオン電池などが使用され、ビデオカメラを駆動するのに充分な電圧が得られるように、例えば複数個直列に接続してある。
【００２０】
そして、各端子１１，１２と二次電池１５との間に接続されたスイッチ１３，１４は、このバッテリ装置１０がビデオカメラや充電器に接続される場合に接触する面から突出する突起１６の状態により切換えが制御される。この突起１６は、図２に示すように、各端子１１，１２などを有しビデオカメラや充電器と当接する面１０ａから若干突出していて、この突出状態が内部のバネ１７の弾性力により維持されるようにしてある。このように突起１６が面１０ａから突出した状態では、各スイッチ１３，１４が開状態となり、二次電池１５が各端子１１，１２から切り離される。
【００２１】
そして、このバッテリ装置１０をビデオカメラや充電器に取付けた場合には、バッテリ装置１０の面１０ａがビデオカメラや充電器と当接して、突起１６の先端部が面１０ａと同一面になるまで押し込まれる。このときの突起１６の移動により、各スイッチ１３，１４が閉状態となり、二次電池１５が各端子１１，１２と接続され、端子１１，１２を介した充電や放電が可能になる。
【００２２】
そして本例においては、このバッテリ装置１０の二次電池１５の状態を検出するバッテリ状態検出回路１８と、この検出回路１８での検出状態に応じた表示を行う表示回路１９とを備え、このバッテリ状態検出回路１８と表示回路１９を作動させる電源を供給するために、正極側の端子１１とスイッチ１３との間から引き出した信号線及び負極側の端子１２とスイッチ１４との間から引き出した信号線を、バッテリ状態検出回路１８と表示回路１９に接続する。
【００２３】
この場合、バッテリ状態検出回路１８で検出するバッテリの状態としては、二次電池１５の充電残量，二次電池１５の温度，二次電池１５の正極と負極との間の電圧などが考えられる。
【００２４】
そして、表示回路１９はバッテリ状態検出回路１８から検出状態に関する情報が供給され、発光ダイオードなどのパイロットランプにより検出した状態を表示する。例えば、二次電池１５の充電残量を、５個のパイロットランプの点灯順序により表示する。或いは、二次電池１５の温度や端子間電圧が異常な温度や電圧になったとき、所定のパイロットランプを点灯させて表示する。但し、このパイロットランプの点灯による表示は、スイッチ１３，１４が閉状態となって二次電池１５からの電源がバッテリ状態検出回路１８及び表示回路１９に供給されているときだけ行う。
【００２５】
このように構成されるバッテリ装置１０を使用することで、このバッテリ装置１０をビデオカメラや充電器に接続させないときには、スイッチ１３，１４が開状態となって、端子１１，１２が二次電池１５と接続されなくなり、端子１１，１２がなんらかの金属に接触して短絡するようなことがあっても、二次電池１５の正極と負極とが短絡することがなく、二次電池１５が短絡する事故を防止することができる。
【００２６】
さらに本例においては、バッテリ状態検出回路１８と表示回路１９とを、このスイッチ１３，１４を介して二次電池１５と接続するようにしたので、このバッテリ装置１０をビデオカメラや充電器に接続させないときには、このバッテリ状態検出回路１８と表示回路１９とに電源が供給されなく、両回路１８，１９による不使用時の無駄な電力消費を防ぐことができると共に、両回路１８，１９に微小な電流が流れ続ける暗電流が発生して過放電が行われて、二次電池１５が損傷する事故を防止できる。
【００２７】
また、ビデオカメラから外された状態のバッテリ装置の突起１６を手動で押し込むことによっても、バッテリ状態検出回路１８と表示回路１９とを作動させることができ、バッテリ装置が外された状態では、突起１６を押したときだけ二次電池１５の状態が表示されるようになる。
【００２８】
なお、上述実施例では二次電池１５の正極側と負極側の双方に１個ずつスイッチ１３，１４を設けたが、何れか一方にだけスイッチを設けるようにしても良い。
【００２９】
また、上述実施例ではバッテリ状態検出回路で検出した状態に基づいた表示を行うようにしたが、バッテリ状態検出回路で検出した状態が異常状態であるとき、二次電池を端子側から切り離すようにしても良い。即ち、例えば図３に示すように、バッテリ装置１０′の端子１１，１２をスイッチ２１，２２を介して二次電池１５と接続する。そして、この二次電池１５の正極側とスイッチ２１との間を、スイッチ１３′を介してバッテリ状態検出回路１８′と接続する共に、二次電池１５の負極側とスイッチ２２との間を、スイッチ１４′を介してバッテリ状態検出回路１８′と接続する。この場合、スイッチ１３′，１４′は、突起１６に連動して開閉するスイッチで、バッテリ装置１０′をビデオカメラや充電器に接続させたときだけ、スイッチ１３′，１４′が閉状態となり、二次電池１５からバッテリ状態検出回路１８′に電源が供給される。そして、バッテリ状態検出回路１８′で検出した二次電池１５の温度，電圧などが異常な値になったとき、スイッチ２１，２２を開状態とする制御を行う。このようにすることで、二次電池１５が異常な状態であるとき、二次電池１５が端子１１，１２側から切り離なれ、充電や放電ができなくなる安全装置として作動する。この場合のスイッチ２１，２２も、何れか一方だけを設けるようにしても良い。
【００３０】
なお、この図３の例の場合に、スイッチ２１，２２を設ける代わりに、図１に示した表示回路１９を設け、残量表示などを行うようにしても良い。
【００３１】
この図３の例の場合には、スイッチ１３′，１４′が二次電池とビデオカメラの電源入力部との間にないので、充電時にバッテリ装置に供給される大電流やビデオカメラ側への大電流の供給に耐え得る大電流用スイッチとする必要がなく、バッテリ状態検出回路１８や表示回路１９を駆動させる程度の小電流（５０ｍＡ程度）用のタクトスイッチ等で良く、簡単な構成のスイッチとすることができる。
【００３２】
また、上述実施例ではビデオカメラ用のバッテリ装置として説明したが、他の負荷装置に接続されるバッテリ装置にも適用できることは勿論である。
【００３３】
【発明の効果】
本発明によると、バッテリ装置が負荷装置又は充電装置と接続されない状態のとき、端子とバッテリ状態検出手段が二次電池から切り離され、端子の短絡事故を防止できると共に、バッテリ状態検出手段に常時電流が流れる暗電流の発生を防止することができる。
【００３５】
さらに、上述した場合にバッテリ状態検出手段で、二次電池の端子間電圧を検出することで、充電器や負荷装置と接続された場合にだけ充電電圧や負荷電圧の異常を検出するようになる。
【００３６】
さらに、上述した場合にバッテリ状態検出手段で、二次電池の充電残量を検出し、検出した残量を表示することで、充電器や負荷装置と接続された場合にだけ二次電池の充電残量が表示されるようになる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す構成図である。
【図２】一実施例によるバッテリ装置の外観を示す斜視図である。
【図３】本発明の他の実施例を示す構成図である。
【符号の説明】
１０，１０′ バッテリ装置
１１，１２ 端子
１３，１３′，１４，１４′ スイッチ
１５ 二次電池
１６ 突起部
１８，１８′ バッテリ状態検出回路
１９ 表示回路[0001]
[Industrial application fields]
The present invention relates to a battery device suitable for application to a battery device that supplies driving power to a video camera.
[0002]
[Prior art]
Conventionally, when shooting with a video camera, a battery device with a built-in secondary battery is usually connected, and power for driving the video camera is supplied from the secondary battery in the battery device.
[0003]
By the way, a battery device connected to a video camera or the like incorporates various protection circuits and state detection circuits to protect and warn the secondary battery when the charging state or discharging state becomes abnormal. There is something to do.
[0004]
[Problems to be solved by the invention]
Here, an internal circuit such as a detection circuit incorporated in the battery device is a circuit that is operated by a power source supplied from a built-in secondary battery. For this reason, if the internal circuit is always operated, a current always flows from the secondary battery in the battery device, the remaining charge of the secondary battery decreases, and a load device such as a video camera is driven. The time that can be shortened.
[0005]
Also, even if the battery device is left unconnected to a load device such as a video camera or a charger, a so-called dark current in which a very small current (generally, the internal circuit consumes little power) always flows from the built-in secondary battery. Occurs, and the secondary battery is destroyed by the discharge of a minute current over a long period of time.
[0006]
An object of the present invention is to prevent generation of a dark current by an internal circuit built in a battery device, thereby preventing useless charging current consumption and damage to the battery itself.
[0007]
[Means for Solving the Problems]
For example, as shown in FIG. 3 , the present invention is a battery device having a built-in secondary battery 15 that can be charged and discharged and having terminals 11 and 12 connected to the load device or the charging device. Supplied from the charging device at the time of charging, which is provided between the connection detection means 16 for detecting the connection with the terminal 11 , 12 and the battery state detection means 16, and is opened when the connection detection means 16 detects no connection. The first switch means 13 ' , 14 ' for small current which is smaller than the large current supplied to the load device and the large current supplied to the load device, and the secondary battery via the first switch means 13 ' , 14 '. A battery state detecting means 18 ' for detecting the temperature of the secondary battery connected to the battery 15, and connecting the secondary battery 15 to the terminals 11 and 12 via the second switch means 21 and 22, When not connected to the device or the charging device, the first switch means 13 ′ , 14 ′ are opened so that the battery state detection means 18 is disconnected from the secondary battery 15 , and the load device or charging device When the detected temperature rises to a predetermined temperature or more in the state of being connected to the secondary battery 15, the second switch means is opened and the secondary battery 15 and the terminals 11 and 12 are disconnected .
[0012]
Furthermore, in the case described above, the battery state detection means detects the voltage across the terminals of the secondary battery.
[0013]
Further, in the case described above, the remaining battery charge is detected by the battery state detection means, and the detected remaining battery charge is displayed.
[0014]
[Action]
According to the present invention, when the battery device is not connected to the load device or the charging device, the terminal and the battery state detecting means are disconnected from the secondary battery, so that a short circuit accident of the terminal can be prevented and the battery state detecting means is always supplied with current. It is possible to prevent dark current from flowing.
[0016]
Furthermore, in the above-described case, the battery state detection means detects the voltage between the terminals of the secondary battery, so that the abnormality of the charging voltage or the load voltage is detected only when connected to the charger or the load device. .
[0017]
Furthermore, in the case described above, the battery state detection means detects the remaining charge of the secondary battery, and displays the detected remaining charge so that the secondary battery is charged only when connected to a charger or load device. The remaining amount is displayed.
[0018]
【Example】
An embodiment of the present invention will be described below with reference to FIGS.
[0019]
FIG. 1 is a diagram showing an internal configuration of the video camera battery device according to the present embodiment. In FIG. The battery device 10 has positive and negative terminals 11 and 12, and a secondary battery 15 is connected between the terminals 11 and 12 via switches 13 and 14. As the secondary battery 15, a nickel cadmium battery, a lithium ion battery, or the like is used. For example, a plurality of secondary batteries 15 are connected in series so as to obtain a voltage sufficient to drive the video camera.
[0020]
The switches 13 and 14 connected between the terminals 11 and 12 and the secondary battery 15 are provided with protrusions 16 protruding from the surfaces that contact when the battery device 10 is connected to a video camera or a charger. Switching is controlled by the state. As shown in FIG. 2, the protrusion 16 slightly protrudes from the surface 10 a that has the terminals 11, 12 and the like and contacts the video camera or the charger, and this protruding state is maintained by the elastic force of the internal spring 17. It is supposed to be. Thus, in the state where the protrusion 16 protrudes from the surface 10 a, the switches 13 and 14 are opened, and the secondary battery 15 is disconnected from the terminals 11 and 12.
[0021]
When the battery device 10 is attached to a video camera or a charger, the surface 10a of the battery device 10 comes into contact with the video camera or the charger, and the tip of the protrusion 16 is flush with the surface 10a. Pushed in. Due to the movement of the protrusion 16 at this time, the switches 13 and 14 are closed, and the secondary battery 15 is connected to the terminals 11 and 12, and charging and discharging via the terminals 11 and 12 are possible.
[0022]
In this example, a battery state detection circuit 18 that detects the state of the secondary battery 15 of the battery device 10 and a display circuit 19 that performs display according to the detection state in the detection circuit 18 are provided. In order to supply power for operating the state detection circuit 18 and the display circuit 19, a signal line drawn from between the positive terminal 11 and the switch 13 and a signal drawn from between the negative terminal 12 and the switch 14 are used. The line is connected to the battery state detection circuit 18 and the display circuit 19.
[0023]
In this case, the state of the battery detected by the battery state detection circuit 18 may be the remaining charge of the secondary battery 15, the temperature of the secondary battery 15, the voltage between the positive electrode and the negative electrode of the secondary battery 15, and the like. .
[0024]
The display circuit 19 is supplied with information on the detection state from the battery state detection circuit 18 and displays the state detected by a pilot lamp such as a light emitting diode. For example, the remaining charge amount of the secondary battery 15 is displayed according to the lighting order of five pilot lamps. Alternatively, when the temperature of the secondary battery 15 or the voltage between terminals becomes an abnormal temperature or voltage, a predetermined pilot lamp is turned on and displayed. However, the display by turning on the pilot lamp is performed only when the switches 13 and 14 are closed and the power from the secondary battery 15 is supplied to the battery state detection circuit 18 and the display circuit 19.
[0025]
By using the battery device 10 configured as described above, when the battery device 10 is not connected to a video camera or a charger, the switches 13 and 14 are opened, and the terminals 11 and 12 are connected to the secondary battery 15. Even if the terminals 11 and 12 are in contact with any metal and short-circuited, the positive and negative electrodes of the secondary battery 15 are not short-circuited and the secondary battery 15 is short-circuited. Can be prevented.
[0026]
Further, in this example, since the battery state detection circuit 18 and the display circuit 19 are connected to the secondary battery 15 via the switches 13 and 14, the battery device 10 is connected to a video camera or a charger. If not, power is not supplied to the battery state detection circuit 18 and the display circuit 19, and wasteful power consumption when not in use by both the circuits 18, 19 can be prevented, and the both circuits 18, 19 have a minute amount. A dark current in which current continues to flow is generated and overdischarge is performed, and an accident in which the secondary battery 15 is damaged can be prevented.
[0027]
Further, the battery state detection circuit 18 and the display circuit 19 can also be operated by manually pushing the protrusion 16 of the battery device in a state where it is removed from the video camera. Only when 16 is pressed, the state of the secondary battery 15 is displayed.
[0028]
In the above-described embodiment, the switches 13 and 14 are provided one on each of the positive electrode side and the negative electrode side of the secondary battery 15, but the switch may be provided on only one of them.
[0029]
In the above embodiment, the display based on the state detected by the battery state detection circuit is performed. However, when the state detected by the battery state detection circuit is an abnormal state, the secondary battery is disconnected from the terminal side. May be. That is, for example, as shown in FIG. 3, the terminals 11 and 12 of the battery device 10 ′ are connected to the secondary battery 15 via the switches 21 and 22. The positive electrode side of the secondary battery 15 and the switch 21 are connected to the battery state detection circuit 18 ′ via the switch 13 ′, and the negative electrode side of the secondary battery 15 and the switch 22 are connected to each other. The battery state detection circuit 18 'is connected via the switch 14'. In this case, the switches 13 ′ and 14 ′ are opened and closed in conjunction with the protrusion 16, and the switches 13 ′ and 14 ′ are closed only when the battery device 10 ′ is connected to a video camera or a charger. Power is supplied from the secondary battery 15 to the battery state detection circuit 18 '. Then, when the temperature, voltage, etc. of the secondary battery 15 detected by the battery state detection circuit 18 ′ become abnormal values, control is performed to open the switches 21, 22. In this way, when the secondary battery 15 is in an abnormal state, the secondary battery 15 is disconnected from the terminals 11 and 12 side, and operates as a safety device that cannot be charged or discharged. In this case, only one of the switches 21 and 22 may be provided.
[0030]
In the case of the example in FIG. 3, instead of providing the switches 21 and 22, the display circuit 19 shown in FIG. 1 may be provided to display the remaining amount.
[0031]
In the case of the example of FIG. 3, since the switches 13 'and 14' are not between the secondary battery and the power input part of the video camera, the large current supplied to the battery device during charging or the connection to the video camera side It is not necessary to use a large current switch that can withstand the supply of a large current, and a tactile switch for small current (about 50 mA) that drives the battery state detection circuit 18 and the display circuit 19 may be used. It can be.
[0032]
In the above-described embodiment, the video camera battery device has been described. However, the present invention can be applied to a battery device connected to another load device.
[0033]
【The invention's effect】
According to the present invention, when the battery device is not connected to the load device or the charging device, the terminal and the battery state detecting means are disconnected from the secondary battery, so that a short circuit accident of the terminal can be prevented and the battery state detecting means is always supplied with current. It is possible to prevent dark current from flowing.
[0035]
Furthermore, in the above-described case, the battery state detection means detects the voltage between the terminals of the secondary battery, so that the abnormality of the charging voltage or the load voltage is detected only when connected to the charger or the load device. .
[0036]
Furthermore, in the case described above, the battery state detection means detects the remaining charge of the secondary battery, and displays the detected remaining charge so that the secondary battery is charged only when connected to a charger or load device. The remaining amount is displayed.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of the present invention.
FIG. 2 is a perspective view showing an external appearance of a battery device according to one embodiment.
FIG. 3 is a block diagram showing another embodiment of the present invention.
[Explanation of symbols]
10, 10 'Battery device 11, 12 Terminals 13, 13', 14, 14 'Switch 15 Secondary battery 16 Protrusion 18, 18' Battery state detection circuit 19 Display circuit

Claims (3)

充電及び放電が可能な二次電池が内蔵され、負荷装置又は充電装置と接続される端子を有するバッテリ装置において、
上記負荷装置又は充電装置との接続を検出する接続検出手段と、
上記端子と上記バッテリ状態検出手段との間に設けられ、上記接続検出手段が接続なしを検出したとき開放する、充電時に充電装置から供給される大電流及び負荷装置へ供給する大電流よりも小さい電流である小電流用の第１のスイッチ手段と、
該第１のスイッチ手段を介して上記二次電池と接続され、上記二次電池の温度を検出するバッテリ状態検出手段とを備え、
第２のスイッチ手段を介して上記二次電池を上記端子と接続させ、上記負荷装置又は充電装置に接続しない状態のとき、上記第１のスイッチ手段が開放状態となって上記バッテリ状態検出手段が上記二次電池から切り離されるようにすると共に、上記負荷装置又は充電装置に接続した状態で、検出した温度が所定温度以上に上昇したとき、上記第２のスイッチ手段を開状態として上記二次電池と上記端子との間を切り離すようにしたバッテリ装置。In a battery device having a built-in secondary battery that can be charged and discharged, and having a terminal connected to a load device or a charging device,
Connection detecting means for detecting connection with the load device or the charging device;
Provided between the terminal and the battery state detection means, and opened when the connection detection means detects no connection. The large current supplied from the charging device during charging and the large current supplied to the load device are smaller. A first switch means for a small current which is a current ;
Via the first switching means is connected to the secondary battery, and a battery state detecting means for detecting the temperature of the secondary battery,
When the secondary battery is connected to the terminal via the second switch means and is not connected to the load device or the charging device, the first switch means is opened and the battery state detection means is The secondary battery is disconnected from the secondary battery , and when the detected temperature rises to a predetermined temperature or more while connected to the load device or the charging device, the secondary battery is opened and the secondary switch is opened. And the above-mentioned terminal . 上記バッテリ状態検出手段で、上記二次電池の端子間電圧を検出するようにした請求項１に記載のバッテリ装置。  The battery device according to claim 1, wherein the battery state detection unit detects a voltage between terminals of the secondary battery. 上記バッテリ状態検出手段で、上記二次電池の充電残量を検出し、検出した残量を表示するようにした請求項１に記載のバッテリ装置。  The battery device according to claim 1, wherein the battery state detection unit detects a remaining charge amount of the secondary battery and displays the detected remaining amount.
JP10556994A 1994-03-02 1994-05-19 Battery device Expired - Fee Related JP3735871B2 (en)

Priority Applications (1)

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JP3253994 1994-03-02
JP6-32539 1994-03-02
JP10556994A JP3735871B2 (en) 1994-03-02 1994-05-19 Battery device

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JP2011229319A (en) 2010-04-21 2011-11-10 Makita Corp Electric tool battery pack
US10116133B2 (en) * 2011-02-14 2018-10-30 Koninklijke Philips N.V. Electrical means to limit current in battery operated patient-connected medical devices
US9069538B2 (en) 2012-02-29 2015-06-30 Sony Corporation Preventing dark current flow in a mobile terminal

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