JP2014204641A - Pack battery and electronic device - Google Patents
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- JP2014204641A JP2014204641A JP2013081690A JP2013081690A JP2014204641A JP 2014204641 A JP2014204641 A JP 2014204641A JP 2013081690 A JP2013081690 A JP 2013081690A JP 2013081690 A JP2013081690 A JP 2013081690A JP 2014204641 A JP2014204641 A JP 2014204641A
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- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000005856 abnormality Effects 0.000 abstract description 9
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
Description
本発明は、パック電池、電子機器に関する。 The present invention relates to a battery pack and an electronic device.
従来のパック電池について、以下の特許文献に開示される。この公報においては、二次電池の充放電回路に直列に挿入された第１および第２のスイッチ素子と、前記二次電池の端子電圧を検出し、この端子電圧が第１の充電禁止電圧に達したとき前記第１のスイッチ素子を非導通状態として前記二次電池の過充電を防止する過充電防止手段と、前記二次電池の端子電圧を検出し、この端子電圧が第１の放電禁止電圧に達したとき前記第２のスイッチ素子を非導通状態として前記二次電池の過放電を防止する過放電防止手段と、前記二次電池の温度を検出して該温度に対応した信号を出力し、所定の温度範囲外のとき前記二次電池の充電を制御するための温度検出手段と、前記二次電池の端子電圧を監視し、この端子電圧が前記第１の充電禁止電圧より高い第２の充電禁止電圧に達すると充電状態の異常として検出し、この端子電圧が前記第１の放電禁止電圧より低い第２の放電禁止電圧に達すると放電状態の異常として検出する異常検出手段と、前記異常検出手段による前記充電状態および放電状態の少なくとも一方の異常検出に応答して前記温度検出手段の出力を強制的に前記所定の温度範囲外に相当する信号に変化させる異常応答手段とを備えている。 Conventional battery packs are disclosed in the following patent documents. In this publication, the first and second switch elements inserted in series in the charge / discharge circuit of the secondary battery and the terminal voltage of the secondary battery are detected, and this terminal voltage becomes the first charge prohibition voltage. Overcharge prevention means for preventing overcharge of the secondary battery by setting the first switch element in a non-conducting state when reached, and detecting a terminal voltage of the secondary battery, the terminal voltage being the first discharge prohibition When the voltage reaches the voltage, the second switch element is turned off to prevent overdischarge of the secondary battery, and the temperature of the secondary battery is detected and a signal corresponding to the temperature is output. And a temperature detecting means for controlling charging of the secondary battery when outside the predetermined temperature range, and a terminal voltage of the secondary battery is monitored, and the terminal voltage is higher than the first charge prohibition voltage. When the charging prohibition voltage of 2 is reached, the charging status is abnormal And detecting an abnormality in the discharge state when the terminal voltage reaches a second discharge inhibition voltage lower than the first discharge inhibition voltage, and the charging state and the discharging state by the abnormality detection unit. And an abnormality response means for forcibly changing the output of the temperature detection means to a signal corresponding to outside the predetermined temperature range in response to at least one abnormality detection.
上記の公報においては、異常応答手段から出力される信号により、充電状態の異常か、放電状態の異常かを区別することは、できなかった。 In the above publication, it has not been possible to distinguish whether the charging state is abnormal or the discharging state is abnormal by a signal output from the abnormality response means.
本発明は、このような問題点を解決するために成されたものであり、信号端子の状態により、充電状態の異常か、放電状態の異常かを区別することができるパック電池、電子機器を提供することを目的とする。 The present invention has been made in order to solve such problems, and a battery pack and an electronic device that can distinguish whether the charging state is abnormal or the discharging state is abnormal depending on the state of the signal terminal. The purpose is to provide.
本発明のパック電池は、電池の過充電を検出し、過充電信号を出力する過充電検出回路と、電池の過放電を検出し、過放電信号を出力する過放電検出回路と、過充電、過放電に対応した抵抗値を示す信号端子と、過充電スイッチング素子と前記信号端子が接続され、前記過充電信号により過充電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値と、過放電スイッチング素子と前記信号端子が接続され、前記過放電信号により過放電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値とが異なることを特徴とする。 The battery pack of the present invention includes an overcharge detection circuit that detects overcharge of the battery and outputs an overcharge signal, an overdischarge detection circuit that detects overdischarge of the battery and outputs an overdischarge signal, A signal terminal indicating a resistance value corresponding to overdischarge, an overcharge switching element and the signal terminal are connected, and a resistance value between the signal terminal and ground when the overcharge switching element is turned on by the overcharge signal The overdischarge switching element and the signal terminal are connected, and the resistance value between the signal terminal and the ground when the overdischarge switching element is turned on by the overdischarge signal is different.
そして、前記過充電スイッチング素子をオフ状態、前記過放電スイッチング素子をオフ状態のとき、前記信号端子と接地との抵抗値は、前記異なる抵抗値とは更に違う抵抗値となる。更に、前記パック電池の識別をおこなうための前記違う抵抗値である。 When the overcharge switching element is turned off and the overdischarge switching element is turned off, the resistance value between the signal terminal and the ground is different from the different resistance value. Furthermore, the different resistance value for identifying the battery pack.
本発明の電子機器は、パック電池を装着する電子機器であり、前記パック電池において、電池の過充電を検出し、過充電信号を出力する過充電検出回路と、電池の過放電を検出
し、過放電信号を出力する過放電検出回路と、
過充電、過放電に対応した抵抗値を示す信号端子と、過充電スイッチング素子と前記信号端子が接続され、前記過充電信号により過充電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値と、過放電スイッチング素子と前記信号端子が接続され、前記過放電信号により過放電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値と、が異なり、前記電子機器の内部電源部の電圧が前記信号端子に印加されることを特徴とする。
The electronic device of the present invention is an electronic device to which a battery pack is attached. In the battery pack, an overcharge detection circuit that detects battery overcharge and outputs an overcharge signal, and detects battery overdischarge, An overdischarge detection circuit for outputting an overdischarge signal;
A signal terminal indicating a resistance value corresponding to overcharge and overdischarge, an overcharge switching element and the signal terminal are connected, and the signal terminal and ground when the overcharge switching element is turned on by the overcharge signal And the resistance value of the signal terminal and the ground when the overdischarge switching element and the signal terminal are connected and the overdischarge switching element is turned on by the overdischarge signal are different from each other. The voltage of the internal power supply unit is applied to the signal terminal.
そして、前記過充電スイッチング素子をオフ状態、前記過放電スイッチング素子をオフ状態のとき、前記信号端子と接地との抵抗値は、前記異なる抵抗値とは更に違う抵抗値となるパック電池であり、前記電子機器の内部電源部の電圧が前記信号端子に印加される。更に、前記違う抵抗値により、パック電池の識別をおこなう。 And, when the overcharge switching element is in an off state and the overdischarge switching element is in an off state, the resistance value of the signal terminal and the ground is a battery pack having a resistance value further different from the different resistance value, The voltage of the internal power supply unit of the electronic device is applied to the signal terminal. Further, the battery pack is identified by the different resistance value.
本発明においては、過放電スイッチング素子と前記信号端子が接続され、前記過放電信号により過放電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値とが異なることより、これらの抵抗値またはこれら抵抗値による電圧を信号端子にて、検出、よって、過充電異常、過放電異常を区別して、検出、認識、出力することができる。 In the present invention, the overdischarge switching element and the signal terminal are connected, and the resistance value between the signal terminal and the ground when the overdischarge switching element is turned on by the overdischarge signal is different from the above. It is possible to detect, recognize, and output a resistance value or a voltage based on these resistance values at a signal terminal, thereby distinguishing overcharge abnormality and overdischarge abnormality.
また、前記過充電スイッチング素子をオフ状態、前記過放電スイッチング素子をオフ状態のとき、前記信号端子と接地との抵抗値は、前記異なる抵抗値とは更に違う抵抗値となるので、この抵抗値またはこの抵抗値による電圧を信号端子にて、検出、認識、出力することができる。 In addition, when the overcharge switching element is in an off state and the overdischarge switching element is in an off state, the resistance value between the signal terminal and the ground becomes a resistance value further different from the different resistance value. Alternatively, the voltage based on this resistance value can be detected, recognized, and output at the signal terminal.
前記違う抵抗値により、パック電池を識別することができる。 The battery pack can be identified by the different resistance value.
本発明の実施例を、図を用いて詳細に説明する。図１に示すように、本実施例においては、パック電池Ａと、これを充電する電源を備えるノート型のような携帯型パーソナルコンピュータ等の携帯機器や、モーター等を駆動する機器等の電気機器である電子機器Ｂとを備えている。パック電池Ａは、通常、電子機器Ｂに着脱自在に装着される構造である。電子機器Ｂには、コンセントからの交流商用電力を直流電力に変換するアダプター（図示せず）から出力される直流電力が供給され、この電力を制御し、供給するマイコンを内蔵する制御・電源部Ｓを備えている。制御・電源手段Ｓからの電力出力は、パック電池Ａを充電するのに利用されたり、電子機器Ｂの負荷Ｌに電力供給される。また、商用電力より電力供給がない場合は、商用電力からのコードがなく、電子機器Ｂは移動でき、パック電池Ａより電力が供給され、制御・電源部Ｓ及び負荷Ｌを駆動させる。なお、本実施例においては、パック電池Ａにおいては、充放電路１２に、スイッチング素子が介在しないので、大きな電流を流すことができる。 Embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, in this embodiment, the battery pack A and a portable device such as a portable personal computer having a power source for charging the battery pack A and an electric device such as a device for driving a motor or the like. And an electronic device B. The battery pack A normally has a structure that is detachably attached to the electronic device B. The electronic device B is supplied with DC power output from an adapter (not shown) that converts AC commercial power from the outlet into DC power, and controls / powers the control / power supply unit with a built-in microcomputer S is provided. The power output from the control / power supply means S is used to charge the battery pack A or is supplied to the load L of the electronic device B. When there is no power supply from commercial power, there is no cord from the commercial power, the electronic device B can move, power is supplied from the battery pack A, and the control / power supply unit S and the load L are driven. In the present embodiment, in the battery pack A, since no switching element is interposed in the charge / discharge path 12, a large current can flow.
パック電池Ａにおいては、リチウムイオン電池等の二次電池１と、電池１が、リチウムイオン２次電池の場合は、電子機器Ｂに電力供給するとき、約2000mAh/セル程度の電池セルを、２〜４セル直列にして利用される。また、セルを並列にも接続して、電池容量を増加させても良い。 In the battery pack A, a secondary battery 1 such as a lithium ion battery, and when the battery 1 is a lithium ion secondary battery, when power is supplied to the electronic device B, a battery cell of about 2000 mAh / cell is used. ~ 4 cells are used in series. Further, the battery capacity may be increased by connecting cells in parallel.
本実施例においては、電池１は図示されるように、電池セル１-１、１-２を直列接続して、複数の電池セルを直列接続している。このような電気接続においては、電池セルの正極、負極に平板状金属片であるタブをスポット溶接等により接続して、電気接続している。 In the present embodiment, as shown in the figure, the battery 1 has battery cells 1-1 and 1-2 connected in series, and a plurality of battery cells connected in series. In such electrical connection, tabs, which are flat metal pieces, are connected to the positive electrode and negative electrode of the battery cell by spot welding or the like, and are electrically connected.
過放電検出回路５−１は、電池セル１-１、１-２の端子電圧を監視し、放電時に端子電圧が、過放電電圧（例えば、３．２Ｖ／セル以下）となるとき（過放電状態）を検出して、過放電信号（例えば、ハイ電圧信号）を出力する。 The overdischarge detection circuit 5-1 monitors the terminal voltages of the battery cells 1-1 and 1-2, and when the terminal voltage becomes an overdischarge voltage (for example, 3.2 V / cell or less) during discharge (overdischarge) State) is detected and an overdischarge signal (for example, a high voltage signal) is output.
過充電検出回路６−１は、電池セル１-１、１-２の端子電圧を監視し、充電時に端子電圧が、過充電電圧（例えば、４．３Ｖ／セル以上）となるとき（過充電状態）を検出して、過充電信号（例えば、ハイ電圧信号）を出力する。 The overcharge detection circuit 6-1 monitors the terminal voltages of the battery cells 1-1 and 1-2, and when the terminal voltage becomes an overcharge voltage (for example, 4.3 V / cell or more) during charging (overcharge). State) is detected and an overcharge signal (for example, a high voltage signal) is output.
本実施例においては、図１に示す回路は、以下の構成を備えている。 In this embodiment, the circuit shown in FIG. 1 has the following configuration.
過放電検出回路５−１からの出力を、ゲートに接続したｎ型ＦＥＴである過放電スイッチング素子５−２と、信号端子１０との間に抵抗Ｒ２（例えば、１ＫΩ）を接続し、過放電スイッチング素子５−２のソース側を接地している。 An output from the overdischarge detection circuit 5-1 is connected to a resistor R2 (for example, 1 KΩ) between the overdischarge switching element 5-2, which is an n-type FET connected to the gate, and the signal terminal 10, and overdischarge is performed. The source side of the switching element 5-2 is grounded.
過充電検出回路６−１からの出力を、ゲートに接続したｎ型ＦＥＴである過充電スイッチング素子６−２と、
電池出力線１１との間に抵抗Ｒ３を接続し、過充電スイッチング素子６−２のソース側を接地している。また、過充電スイッチング素子６−２と並列に抵抗Ｒ４が接続され、過充電スイッチング素子６−２のドレインが、ｎ型ＦＥＴである第２過充電スイッチング素子６−３のゲートに接続されている。信号端子１０との間に抵抗Ｒ１（例えば、４ＫΩ）を接続し、第２過充電スイッチング素子６−３のソース側を接地している。
An overcharge switching element 6-2 that is an n-type FET connected to the gate of the output from the overcharge detection circuit 6-1;
A resistor R3 is connected between the battery output line 11 and the source side of the overcharge switching element 6-2 is grounded. A resistor R4 is connected in parallel with the overcharge switching element 6-2, and the drain of the overcharge switching element 6-2 is connected to the gate of the second overcharge switching element 6-3, which is an n-type FET. . A resistor R1 (for example, 4 KΩ) is connected between the signal terminal 10 and the source side of the second overcharge switching element 6-3 is grounded.
電子機器Ｂにおいては、商用電力から供給される、または、電池１の出力から電源を作る内部電源部７（例えば、５Ｖ出力）を備え、抵抗Ｒ５（例えば、１ＫΩ）を介して、パック電池Ａが電子機器Ｂに装着されるとき、信号端子１０に、接続される。 The electronic device B includes an internal power supply unit 7 (for example, 5V output) that is supplied from commercial power or generates power from the output of the battery 1, and the battery pack A is connected via a resistor R5 (for example, 1KΩ). Is connected to the signal terminal 10 when attached to the electronic device B.
本実施例においては、以上の構成であるので、以下のように、検出、識別認識、出力することができる。 In the present embodiment, since the configuration is as described above, detection, identification recognition, and output can be performed as follows.
過放電状態、過充電状態が検出されないとき、ハイ電圧信号が出力されないので、過放電スイッチング素子５−２がオフ状態であり、信号端子１０より、抵抗Ｒ２に電流が流れない。また、過充電スイッチング素子６−２がオフ状態であり、電池出力線１１からの電圧は、抵抗Ｒ３と抵抗Ｒ４に分圧される。分圧された電圧が、第２過充電スイッチング素子６−３のゲートに印加され、オン状態となることで、内部電源部７（５Ｖ）の電圧が、抵抗Ｒ５（１ＫΩ）と抵抗Ｒ１（４ＫΩ）に分圧され、信号端子１０には、分圧電圧（４Ｖ）が出力され、この分圧電圧を、電子機器Ｂの制御・電源部Ｓが、検出、識別することにより、パック電池Ａの過放電状態、過充電状態が検出されないと状態であることを、検出、識別する。更に、このとき、抵抗Ｒ１（４ＫΩ）による分圧電圧（４Ｖ）であることを、検出、識別することにより、パック電池Ａが、電子機器Ｂに適合するものであることが、電子機器Ｂの制御・電源部Ｓが、検出、識別することができる。このとき、信号端子１０の電圧が、４Ｖ、以下に説明するか過放電状態の２．２Ｖ、過充電状態の５Ｖ以外であるときは、電子機器Ｂの制御・電源部Ｓが、パック電池が電子機器Ｂに適合しないものであるとして、パック電池を使用できないようにしたり、使用できないとの表示を行うことができる。 When an overdischarge state or an overcharge state is not detected, a high voltage signal is not output, so the overdischarge switching element 5-2 is in an off state, and no current flows from the signal terminal 10 to the resistor R2. Further, the overcharge switching element 6-2 is in the off state, and the voltage from the battery output line 11 is divided into the resistor R3 and the resistor R4. When the divided voltage is applied to the gate of the second overcharge switching element 6-3 and turned on, the voltage of the internal power supply unit 7 (5V) becomes the resistance R5 (1 KΩ) and the resistance R1 (4 KΩ). ), And a divided voltage (4 V) is output to the signal terminal 10. The control / power supply unit S of the electronic device B detects and identifies this divided voltage, thereby If an overdischarge state or an overcharge state is not detected, the state is detected and identified. Further, at this time, the fact that the battery pack A is suitable for the electronic device B by detecting and identifying that the divided voltage (4 V) is generated by the resistor R1 (4 KΩ) The control / power supply S can be detected and identified. At this time, when the voltage of the signal terminal 10 is other than 4V, 2.2V in the overdischarged state or 5V in the overcharged state as described below, the control / power supply unit S of the electronic device B is connected to the battery pack. The battery pack cannot be used or can be displayed as being unusable because it is not compatible with the electronic device B.
過放電状態が検出されたとき、過放電検出回路５−１は、過放電信号（ハイ電圧信号）を出力するので、過放電スイッチング素子５−２がオン状態であり、信号端子１０より、抵抗Ｒ２に電流が流れることになり、上記の説明から理解できるように、Ｒ１とＲ２との並列抵抗値、即ち、（Ｒ１×Ｒ２）／（Ｒ１＋Ｒ２）（０．８ＫΩ）と、Ｒ５との分圧電圧（２．２Ｖ）が出力され、この分圧電圧を、電子機器Ｂの制御・電源部Ｓが、検出、識別することにより、パック電池Ａが過放電状態であることを、検出、識別する。 When the overdischarge state is detected, the overdischarge detection circuit 5-1 outputs an overdischarge signal (high voltage signal). Therefore, the overdischarge switching element 5-2 is in an on state, and a resistance is applied from the signal terminal 10. As the current flows through R2, as can be understood from the above description, the parallel resistance value of R1 and R2, that is, (R1 × R2) / (R1 + R2) (0.8 KΩ), and the partial pressure of R5 A voltage (2.2 V) is output, and the divided voltage is detected and identified by the control / power supply unit S of the electronic device B, thereby detecting and identifying that the battery pack A is in an overdischarged state. .
過充電状態が検出されたとき、過充電検出回路６−１は、過充電信号（ハイ電圧信号）を出力するので、過充電スイッチング素子６−２がオン状態であり、過充電スイッチング素子６−２のドレインが接地電位となることで、第２過充電スイッチング素子６−３のゲートが低電圧となることにより、オフ状態となり、信号端子１０より、抵抗Ｒ１に電流が流れず、上記の説明から理解できるように、抵抗Ｒ２にも電流が流れないことより、信号端子１０には、内部電源部７（５Ｖ）の電圧が、印加、出力され、この電圧を、電子機器Ｂの制御・電源部Ｓが、検出、識別することにより、パック電池Ａが過充電状態であることを、検出、識別する。 When the overcharge state is detected, the overcharge detection circuit 6-1 outputs an overcharge signal (high voltage signal), so that the overcharge switching element 6-2 is in the on state, and the overcharge switching element 6-6. When the second drain becomes the ground potential, the gate of the second overcharge switching element 6-3 becomes a low voltage, thereby turning off, and no current flows from the signal terminal 10 to the resistor R1. As can be understood from the above, since no current flows through the resistor R2, the voltage of the internal power supply unit 7 (5V) is applied to and output from the signal terminal 10, and this voltage is used as a control / power supply for the electronic device B. The part S detects and identifies that the battery pack A is in an overcharged state.
また、以上の説明のように、過充電状態のときの信号端子１０と接地との抵抗値は、大きな値（無限大）となり、過放電状態のときは、抵抗値は（Ｒ１×Ｒ２）／（Ｒ１＋Ｒ２）（０．８ＫΩ）となるので、抵抗値は異なることになる。また、過放電状態、過充電状態が検出されないとき（パック電池を識別するとき）の抵抗値は、抵抗Ｒ１（４ＫΩ）となり、更に、違う抵抗値となる。 Further, as described above, the resistance value between the signal terminal 10 and the ground in the overcharge state is a large value (infinite), and in the overdischarge state, the resistance value is (R1 × R2) / Since (R1 + R2) (0.8 KΩ), the resistance values are different. Further, the resistance value when the overdischarge state and the overcharge state are not detected (when the battery pack is identified) is the resistance R1 (4 KΩ), which is a different resistance value.
図２は、本発明の他の実施例を示し、図１と同一な内容は説明を省略し、異なる部分を、以下に説明する。 FIG. 2 shows another embodiment of the present invention, the description of the same contents as in FIG. 1 is omitted, and different parts will be described below.
過放電検出回路５−１からの出力を、ゲートに接続したｎ型ＦＥＴである過放電スイッチング素子１５−２と、信号端子１０との間に抵抗Ｒ１２（例えば、１ＫΩ）を接続し、過放電スイッチング素子５−２のソース側を接地している。 The output from the overdischarge detection circuit 5-1 is connected to a resistor R12 (for example, 1 KΩ) between the overdischarge switching element 15-2, which is an n-type FET connected to the gate, and the signal terminal 10, and overdischarge is performed. The source side of the switching element 5-2 is grounded.
過充電検出回路６−１からの出力を、ゲートに接続したｎ型ＦＥＴである過充電スイッチング素子１６−２を備え、この過充電スイッチング素子１６−２のドレインを信号端子１０に接続し、ソース側を接地している。 An output from the overcharge detection circuit 6-1 is provided with an overcharge switching element 16-2, which is an n-type FET connected to the gate, and the drain of the overcharge switching element 16-2 is connected to the signal terminal 10, and the source The side is grounded.
また、信号端子１０は、抵抗Ｒ１０（例えば、４ＫΩ）を介して、接地されている。 The signal terminal 10 is grounded via a resistor R10 (for example, 4 KΩ).
本実施例においては、以上の構成であるので、以下のように、検出、識別認識、出力することができる。 In the present embodiment, since the configuration is as described above, detection, identification recognition, and output can be performed as follows.
過放電状態、過充電状態が検出されないとき、ハイ電圧信号が出力されないので、過放電スイッチング素子１５−２がオフ状態であり、信号端子１０より、抵抗Ｒ２に電流が流れない。また、過充電スイッチング素子１６−２がオフ状態であり、ここを電流を流れない。そして、内部電源部７（５Ｖ）の電圧が、抵抗Ｒ５（１ＫΩ）と抵抗Ｒ１０（４ＫΩ）に分圧され、信号端子１０には、分圧電圧（４Ｖ）が出力され、この分圧電圧を、電子機器Ｂの制御・電源部Ｓが、検出、識別することにより、パック電池Ａの過放電状態、過充電状態が検出されないと状態であることを、検出、識別する。更に、このとき、抵抗Ｒ１０（４ＫΩ）による分圧電圧（４Ｖ）であることを、検出、識別することにより、パック電池Ａが、電子機器Ｂに適合するものであることが、電子機器Ｂの制御・電源部Ｓが、検出、識別することができる。このとき、信号端子１０の電圧が、４Ｖ、以下に説明するか過放電状態の２．２Ｖ、過充電状態の５Ｖ以外であるときは、電子機器Ｂの制御・電源
部Ｓが、パック電池が電子機器Ｂに適合しないものであるとして、パック電池を使用できないようにしたり、使用できないとの表示を行うことができる。
When the overdischarge state and the overcharge state are not detected, the high voltage signal is not output, so the overdischarge switching element 15-2 is in the off state, and no current flows from the signal terminal 10 to the resistor R2. Moreover, the overcharge switching element 16-2 is in an OFF state, and no current flows therethrough. The voltage of the internal power supply unit 7 (5 V) is divided into a resistor R5 (1 KΩ) and a resistor R10 (4 KΩ), and a divided voltage (4 V) is output to the signal terminal 10. Then, the control / power supply unit S of the electronic device B detects and identifies the state where the overdischarge state and the overcharge state of the battery pack A are not detected by detecting and identifying. Further, at this time, the fact that the battery pack A is suitable for the electronic device B by detecting and identifying the divided voltage (4V) by the resistor R10 (4KΩ) The control / power supply S can be detected and identified. At this time, when the voltage of the signal terminal 10 is other than 4V, 2.2V in the overdischarged state or 5V in the overcharged state as described below, the control / power supply unit S of the electronic device B is connected to the battery pack. The battery pack cannot be used or can be displayed as being unusable because it is not compatible with the electronic device B.
過放電状態が検出されたとき、過放電検出回路１５−１は、過放電信号（ハイ電圧信号）を出力するので、過放電スイッチング素子１５−２がオン状態であり、信号端子１０より、抵抗Ｒ２に電流が流れることになり、上記の説明から理解できるように、Ｒ１０とＲ１２との並列抵抗値、即ち、（Ｒ１０×Ｒ１２）／（Ｒ１０＋Ｒ１２）（０．８ＫΩ）と、Ｒ５との分圧電圧（２．２Ｖ）が出力され、この分圧電圧を、電子機器Ｂの制御・電源部Ｓが、検出、識別することにより、パック電池Ａが過放電状態であることを、検出、識別する。 When the overdischarge state is detected, the overdischarge detection circuit 15-1 outputs an overdischarge signal (high voltage signal), so that the overdischarge switching element 15-2 is in an on state, and a resistance is applied from the signal terminal 10. As the current flows through R2, as can be understood from the above description, the parallel resistance value of R10 and R12, that is, (R10 × R12) / (R10 + R12) (0.8 KΩ), and the partial pressure of R5 A voltage (2.2 V) is output, and the divided voltage is detected and identified by the control / power supply unit S of the electronic device B, thereby detecting and identifying that the battery pack A is in an overdischarged state. .
過充電状態が検出されたとき、過充電検出回路１６−１は、過充電信号（ハイ電圧信号）を出力するので、過充電スイッチング素子１６−２がオン状態であり、信号端子１０は、接地となり、０Ｖとなる。この電圧を、電子機器Ｂの制御・電源部Ｓが、検出、識別することにより、パック電池Ａが過充電状態であることを、検出、識別する。 When the overcharge state is detected, the overcharge detection circuit 16-1 outputs an overcharge signal (high voltage signal), so that the overcharge switching element 16-2 is in the on state and the signal terminal 10 is connected to the ground. And becomes 0V. The control / power supply unit S of the electronic device B detects and identifies this voltage to detect and identify that the battery pack A is in an overcharged state.
また、以上の説明のように、過充電状態のときの信号端子１０と接地との抵抗値は、約ＯΩとなり、過放電状態のときは、抵抗値は（Ｒ１0×Ｒ１２）／（Ｒ１0＋Ｒ１２）（０．８ＫΩ）となるので、抵抗値は異なることになる。また、過放電状態、過充電状態が検出されないとき（パック電池を識別するとき）の抵抗値は、抵抗Ｒ１（４ＫΩ）となり、更に、違う抵抗値となる。 Further, as described above, the resistance value between the signal terminal 10 and the ground in the overcharge state is approximately OΩ, and in the overdischarge state, the resistance value is (R10 × R12) / (R10 + R12) ( 0.8KΩ), the resistance value is different. Further, the resistance value when the overdischarge state and the overcharge state are not detected (when the battery pack is identified) is the resistance R1 (4 KΩ), which is a different resistance value.
本他の実施例は、上記の図１の実施例と比較すると、過放電状態、過充電状態が検出されないとき、抵抗に電流が流れない（図１において、抵抗Ｒ３、抵抗Ｒ４に電流が流れる）ので、省エネルギーな回路である。 Compared with the embodiment of FIG. 1 described above, when the overdischarge state and the overcharge state are not detected, no current flows through the resistor in the other embodiments (in FIG. 1, no current flows through the resistor R3 and the resistor R4). Therefore, it is an energy-saving circuit.
Ａ パック電池
Ｂ 電子機器（＝携帯機器）
Ｓ 制御・電源部
Ｌ 負荷
１ 電池
５−１ 過放電検出回路
５−２ １５−２過放電スイッチング素子
６−１ 過充電検出回路
６−２ １６−２過充電スイッチング素子
６−３ 第２過充電スイッチング素子
７ 内部電源部
１０ 信号端子
１１ 電池出力線
１２ 充放電路
A Pack battery B Electronic equipment (= portable equipment)
S Control / Power Supply Unit L Load 1 Battery 5-1 Overdischarge Detection Circuit 5-2 15-2 Overdischarge Switching Element 6-1 Overcharge Detection Circuit 6-2 16-2 Overcharge Switching Element 6-3 Second Overcharge Switching element 7 Internal power supply 10 Signal terminal 11 Battery output line 12 Charge / discharge path
Claims (6)
電池の過放電を検出し、過放電信号を出力する過放電検出回路と、
過充電、過放電に対応した抵抗値を示す信号端子と、
過充電スイッチング素子と前記信号端子が接続され、前記過充電信号により過充電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値と、
過放電スイッチング素子と前記信号端子が接続され、前記過放電信号により過放電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値と、
が異なることを特徴とするパック電池。 An overcharge detection circuit that detects overcharge of the battery and outputs an overcharge signal;
An overdischarge detection circuit for detecting an overdischarge of the battery and outputting an overdischarge signal;
A signal terminal indicating a resistance value corresponding to overcharge and overdischarge;
An overcharge switching element and the signal terminal are connected, and a resistance value between the signal terminal and the ground when the overcharge switching element is turned on by the overcharge signal,
An overdischarge switching element and the signal terminal are connected, and a resistance value between the signal terminal and the ground when the overdischarge switching element is turned on by the overdischarge signal,
Battery packs characterized by different battery packs.
前記パック電池において、
電池の過充電を検出し、過充電信号を出力する過充電検出回路と、
電池の過放電を検出し、過放電信号を出力する過放電検出回路と、
過充電、過放電に対応した抵抗値を示す信号端子と、
過充電スイッチング素子と前記信号端子が接続され、前記過充電信号により過充電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値と、
過放電スイッチング素子と前記信号端子が接続され、前記過放電信号により過放電スイッチング素子をオン状態にしたときの前記信号端子と接地との抵抗値と、
が異なり、
前記電子機器の内部電源部の電圧が前記信号端子に印加されることを特徴とする電子機器。 An electronic device with a battery pack,
In the battery pack,
An overcharge detection circuit that detects overcharge of the battery and outputs an overcharge signal;
An overdischarge detection circuit for detecting an overdischarge of the battery and outputting an overdischarge signal;
A signal terminal indicating a resistance value corresponding to overcharge and overdischarge;
An overcharge switching element and the signal terminal are connected, and a resistance value between the signal terminal and the ground when the overcharge switching element is turned on by the overcharge signal,
An overdischarge switching element and the signal terminal are connected, and a resistance value between the signal terminal and the ground when the overdischarge switching element is turned on by the overdischarge signal,
Is different,
An electronic device, wherein a voltage of an internal power supply unit of the electronic device is applied to the signal terminal.
前記電子機器の内部電源部の電圧が前記信号端子に印加されることを特徴とする請求項４の電子機器。 When the overcharge switching element is in an off state and the overdischarge switching element is in an off state, the resistance value between the signal terminal and the ground is a battery pack having a resistance value different from the different resistance value.
The electronic device according to claim 4, wherein a voltage of an internal power supply unit of the electronic device is applied to the signal terminal.
The electronic device according to claim 5, wherein the battery pack is identified by the different resistance value.
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