JPH10225001A - Charger and charging system - Google Patents
Charger and charging systemInfo
- Publication number
- JPH10225001A JPH10225001A JP9028640A JP2864097A JPH10225001A JP H10225001 A JPH10225001 A JP H10225001A JP 9028640 A JP9028640 A JP 9028640A JP 2864097 A JP2864097 A JP 2864097A JP H10225001 A JPH10225001 A JP H10225001A
- Authority
- JP
- Japan
- Prior art keywords
- switch
- charging
- battery
- voltage
- detecting
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、充電器に関し、
被充電電池、携帯機の装着(挿入)の有無の検知し得る
充電器に関する。The present invention relates to a battery charger,
The present invention relates to a battery to be charged and a charger capable of detecting whether or not a portable device is attached (inserted).
【0002】[0002]
【従来の技術】充電器より携帯機(電池)の充電器への
接続の有無を検出する場合、すなわち、充電器への被充
電携帯機(電池)の装着を検知し、装着が検知されると
自動的に充電を開始、また、充電器より被充電携帯機
(電池)が取り外された時、充電器の出力を停止する場
合等においては、充電用の2端子に加えて抵抗又は、サ
ーミスタ用の検出用端子を設ける等の方法があるが、携
帯機への低コスト化、サイズを小さく、重量低減等の要
求に対して、端子数増加により、高コスト化、機器の大
型化になっていた。特に機器の重量については、通常1
ピン当たりの必要加重重量が決められており、端子数増
加は、機器のサイズを小さく、重量低減に関して、構造
上の制限を与えることになる。2. Description of the Related Art When a charger detects whether or not a portable device (battery) is connected to a charger, that is, the attachment of a portable device (battery) to be charged to the charger is detected, and the attachment is detected. When the portable device (battery) to be charged is removed from the charger and the output of the charger is stopped, a resistor or thermistor is added in addition to the two terminals for charging. There is a method of providing a detection terminal for the portable device, etc., but in response to the demand for lower cost, smaller size, and weight reduction of portable equipment, the number of terminals has increased, resulting in higher cost and larger equipment. I was Especially for the weight of equipment, usually 1
The required weight per pin is determined, and the increase in the number of terminals reduces the size of the device and imposes a structural limitation on weight reduction.
【0003】そこで、充電器、携帯機共に検出用の端子
を設けることなく、携帯機(電池)の充電器への接続の
有無を検出できることが好ましい。その具体方法として
特開昭59−153427号公報に見られるように、充
電回路内で、定められた周期での鋸歯状波の出力を行い
その際の充電端子に現れる電池電圧を演算し、前回の演
算値と比較することにより、充電器の出力を制御するも
の、特開平6−269132号公報に見られるように、
充電器の出力をスイッチで切り替え、その際の充電端子
に現れる電池の電圧のみを比較して携帯機(電池)の有
無検出を行うものがある。Therefore, it is preferable to be able to detect whether or not a portable device (battery) is connected to a charger without providing a terminal for detection in both the charger and the portable device. As a specific method, as shown in JP-A-59-153427, a sawtooth wave is output at a predetermined period in a charging circuit, and a battery voltage appearing at a charging terminal at that time is calculated. Which controls the output of the charger by comparing the calculated value with the calculated value, as seen in JP-A-6-269132.
In some cases, the output of the charger is switched by a switch, and only the voltage of the battery appearing at the charging terminal at that time is compared to detect the presence or absence of the portable device (battery).
【0004】[0004]
【発明が解決しようとする課題】しかしながら、鋸歯状
波の出力を行い、電池電圧を演算するものは回路構成も
複雑になる。また、充電器の出力をスイッチで切り替
え、電池の電圧のみを比較して携帯機(電池)の有無検
出を行うものは、接触不良、端子の酸化により誤検出を
する恐れがあり確実性に問題がある。However, a circuit for outputting a sawtooth wave and calculating a battery voltage has a complicated circuit configuration. In the case of a portable device (battery) which detects the presence or absence of a portable device (battery) by switching the output of the charger with a switch and comparing only the voltage of the battery, there is a risk of erroneous detection due to poor contact or oxidation of the terminal, which is a problem with reliability. There is.
【0005】この発明は、上述のような課題を解決する
ためになされたもので、目的は、簡単にして確実に充電
器側で携帯機(電池)の接続有無を検出することにあ
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to simply and reliably detect whether or not a portable device (battery) is connected on a charger side.
【0006】[0006]
【課題を解決するための手段】この発明に係る充電器に
おいては、充電端子が2端子で、電池を充電する充電器
において、充電端子と電源回路との間に接続されたスイ
ッチと、このスイッチを周期的に開閉動作する開閉手段
と、前記スイッチの開閉動作中に前記充電端子に現れる
電圧を検出する電圧検出手段と、前記充電端子と前記電
源回路間に流れる電流を検出する電流検出手段と、これ
らの検出手段の検出結果に基づいて電池の装着の有無を
検知する検知手段を備えたことを特徴とする。According to the present invention, there is provided a charger for charging a battery having two charging terminals and a switch connected between the charging terminal and a power supply circuit. Switching means for periodically opening and closing the switch, voltage detection means for detecting a voltage appearing at the charging terminal during the opening and closing operation of the switch, and current detection means for detecting a current flowing between the charging terminal and the power supply circuit. And detecting means for detecting whether or not the battery is mounted based on the detection results of these detecting means.
【0007】また、この発明に係る携帯機の充電システ
ムにおいては、第1の充電端子が2端子で、この第1の
充電端子と電源回路との間に接続された第1のスイッチ
と、この第1のスイッチを周期的に開閉動作する開閉手
段と、前記第1のスイッチの開閉動作中に前記第1の充
電端子に現れる電圧を検出する電圧検出手段と、前記第
1の充電端子と前記電源回路間に流れる電流を検出する
電流検出手段と、これらの検出手段の検出結果に基づい
て電池の装着の有無を検知する検知手段とを備えた充電
器及び、前記第1の充電端子に接離する第2の充電端子
と、この充電端子と電池との間に接続された第2のスイ
ッチと、この第2のスイッチを周期的に開閉動作する開
閉手段と、前記第2のスイッチの開閉動作中に前記第2
の充電端子に現れる電圧を検出する電圧検出手段と、こ
の検出手段の検出結果に基づいて充電器の装着の有無を
検知する検知手段とを備えた携帯機を有し、充電器及び
携帯機が相互の装着の有無を検出することを可能とした
ことを特徴とする。In the charging system for a portable device according to the present invention, the first charging terminal has two terminals, and a first switch connected between the first charging terminal and the power supply circuit; Opening and closing means for periodically opening and closing the first switch, voltage detection means for detecting a voltage appearing at the first charging terminal during opening and closing of the first switch, A charger provided with current detection means for detecting a current flowing between the power supply circuits, and detection means for detecting whether or not a battery is mounted based on the detection results of these detection means; A second charging terminal to be separated, a second switch connected between the charging terminal and the battery, opening / closing means for periodically opening / closing the second switch, and opening / closing of the second switch The second during operation
And a detecting device for detecting whether or not the charger is mounted based on the detection result of the detecting device. It is characterized in that it is possible to detect the presence or absence of mutual mounting.
【0008】[0008]
実施の形態1.図1は、この発明の実施の形態1を示す
回路ブロック図であり、図において、1は所定の定電圧
及び定電流を出力する電源回路、2は電源回路1に接続
された一対の第1の充電端子、3は電源回路1と第1の
充電端子2との間に接続された主充電用の第1スイッチ
である。4は第1スイッチ3と並列に接続された抵抗、
5は電源回路1と第1の充電端子2との間に接続された
充電電流検出抵抗、6は充電電流検出回路、7は第1の
充電端子2間に接続された電圧検出抵抗、8は第1の充
電端子2間に現れる電圧検出回路、9は充電電流及び充
電端子間電圧の検出結果に応じて、第1スイッチ3の開
閉動作を含む充電動作を行う充電制御回路、10は第1
の充電端子2に接続されて充電されるリチウム2次電池
等の電池、11は第1の充電端子2に接続される電池の
被充電端子である。尚、第1スイッチ3は、トランジス
タ、FET等の半導体スイッチ素子により構成される。Embodiment 1 FIG. FIG. 1 is a circuit block diagram showing Embodiment 1 of the present invention. In the drawing, reference numeral 1 denotes a power supply circuit that outputs a predetermined constant voltage and a constant current, and 2 denotes a pair of first power supply circuits connected to a power supply circuit 1. The charging terminal 3 is a first switch for main charging connected between the power supply circuit 1 and the first charging terminal 2. 4 is a resistor connected in parallel with the first switch 3,
5 is a charging current detecting resistor connected between the power supply circuit 1 and the first charging terminal 2, 6 is a charging current detecting circuit, 7 is a voltage detecting resistor connected between the first charging terminals 2, and 8 is A voltage detection circuit that appears between the first charging terminals 2, 9 is a charging control circuit that performs a charging operation including an opening and closing operation of the first switch 3 in accordance with a detection result of the charging current and the voltage between the charging terminals, and 10 is a first charging control circuit.
A battery, such as a lithium secondary battery, connected to the charging terminal 2 and charged, and 11 is a charged terminal of the battery connected to the first charging terminal 2. Note that the first switch 3 is configured by a semiconductor switch element such as a transistor or an FET.
【0009】図2は本発明の検出動作のフローチャート
を示しており、また、図3は各動作の波形図として示し
ている。ここで、図2に示すステップS1における動作
は、図3に示すS1の期間と対応している。FIG. 2 shows a flowchart of the detection operation of the present invention, and FIG. 3 shows a waveform diagram of each operation. Here, the operation in step S1 shown in FIG. 2 corresponds to the period of S1 shown in FIG.
【0010】以下、これら各図を参照して動作を説明す
る。以下の動作は、充電器に電源が投入されることによ
り、開始される。The operation will be described below with reference to these drawings. The following operation is started when the power is turned on to the charger.
【0011】まず、図3において、ステップS1は、充
電器においては第1の充電端子2に電池10または、電
池10を装着した携帯機(以下、携帯機)が装着された
か否かの検出動作を示す。次に図2のフローチャートを
基に充電器における検出動作について説明する。First, in FIG. 3, a step S1 is an operation for detecting whether or not the battery 10 or a portable device equipped with the battery 10 (hereinafter, portable device) is attached to the first charging terminal 2 in the charger. Is shown. Next, the detection operation in the charger will be described based on the flowchart of FIG.
【0012】充電器に電源が投入された時の電池10ま
たは、携帯機の充電器への挿入(装着)記録は無し(B
AT=0)を初期値とする(ステップS201)。ステ
ップS202、ステップS204で第1スイッチ3のO
FF/ONが一定周期で充電制御回路9を介して繰り返
し行われ、ステップS203で第1の充電端子2間に接
続された電圧検出抵抗7の両端電圧Voutを電圧検出
回路8での検出による電圧チェック、ステップS205
で充電電流検出抵抗5を流れる電流Ioutを充電電流
検出回路6での検出による電流チェックが各々行われ
る。充電電流検出回路6では、充電電流検出抵抗5の両
端電圧より検出した電圧値を充電電流検出抵抗5の抵抗
値より電流値に変換(実際の回路例では、抵抗値は1Ω
であり検出電圧値=電流値となる)して電流値データと
して出力する。There is no record of insertion (attachment) of the battery 10 or the portable device into the charger when the power is turned on to the charger (B)
AT = 0) is set as an initial value (step S201). In steps S202 and S204, the O of the first switch 3
FF / ON is repeatedly performed at regular intervals through the charge control circuit 9, and the voltage Vout across the voltage detection resistor 7 connected between the first charging terminals 2 is detected by the voltage detection circuit 8 in step S <b> 203. Check, step S205
Then, a current check is performed by detecting the current Iout flowing through the charging current detection resistor 5 by the charging current detection circuit 6. In the charging current detection circuit 6, the voltage value detected from the voltage across the charging current detection resistor 5 is converted into a current value from the resistance value of the charging current detection resistor 5 (in an actual circuit example, the resistance value is 1Ω).
And the detected voltage value = current value), and outputs as current value data.
【0013】今、電池10または、携帯機が第1の充電
端子2に未装着の場合、電圧検出抵抗7の両端電圧Vo
utは、第1スイッチ3がON時には、電源回路1の出
力電圧Vchg(4.1V)に、一方、第1スイッチ3
がOFF時には、電源回路1の出力電圧Vchgを抵抗
4と電圧検出抵抗7で分圧した出力電圧Vchg47
(3.5V)になる。また、充電電流検出抵抗5に流れ
る電流Ioutは、ほぼ0mAのままである。従って、
ステップS205の電流チェックでI<20mAとな
り、電池無し(ステップS210)と判定される。If the battery 10 or the portable device is not attached to the first charging terminal 2, the voltage Vo across the voltage detecting resistor 7
When the first switch 3 is ON, the output voltage Vchg (4.1 V) of the power supply circuit 1 is changed to the output voltage Vchg (4.1 V).
Is OFF, the output voltage Vchg 47 obtained by dividing the output voltage Vchg of the power supply circuit 1 by the resistor 4 and the voltage detection resistor 7 is output.
(3.5 V). Further, the current Iout flowing through the charging current detection resistor 5 remains almost 0 mA. Therefore,
In the current check in step S205, I <20 mA, and it is determined that there is no battery (step S210).
【0014】電池10または、携帯機が第1の充電端子
2に装着されている場合で、ステップS203の電圧チ
ェックでV≦3.9V(3.9V以下なら充電が必要と
判定)、ステップS205でI≧20mAとなれば、電
池有り(ステップS208)と判定され、ステップS2
09の充電状態に入る。ステップS209の充電中にお
いても電流チェックを行い、I<100mAとなった時
充電完了(ステップS211)とし、ここで電池10ま
たは、携帯機の充電器への挿入(装着)記録を有り(B
AT=1)と設定する。If the battery 10 or the portable device is attached to the first charging terminal 2, V ≦ 3.9V (the charging is determined to be required if it is 3.9V or less) in the voltage check in step S203, and step S205. If I ≧ 20 mA in step S2, it is determined that a battery is present (step S208) and step S2
The state of charge 09 is entered. A current check is also performed during charging in step S209. When I <100 mA, charging is completed (step S211), and there is a record of insertion (attachment) to the battery 10 or the charger of the portable device (B).
AT = 1) is set.
【0015】ステップS203でV>3.9Vならば、
ステップS206において挿入記録がチェックされる。
BAT=1ならば、充電完了後、挿入されたままとし、
ステップS211の充電完了へ進む。BAT=0なら
ば、携帯機が前回は使用の状態、すなわち、携帯機が充
電器より外されていた状態であったとして、ステップS
207で充電端子2の電圧をチェックする。V≧4.0
5Vならば、ステップS211の充電完了へ進む。これ
は、4.05Vは、例えば、満充電電圧4.1Vに対し
て、携帯機における連続通話時間のスペックを確保でき
る最低電池電圧であり、また、充電器は、充電中は赤ラ
ンプ点灯、満充電時は緑ランプ点灯という動作がある
が、連続通話時間保証電圧4.05Vをしきい値とし
て、ほとんど未使用(電池電圧降下が僅か)の場合、赤
ランプを点灯して補充電動作に入るよりも、すぐに緑ラ
ンプを点灯し、使用者に満充電を知らせることが好まし
いからである。V<4.05Vならば、補充電必要とし
て、ステップS205の電流チェック、充電動作(ステ
ップS209)と進む。If V> 3.9V in step S203,
In step S206, the insertion record is checked.
If BAT = 1, leave inserted after charging is completed,
The process proceeds to the completion of charging in step S211. If BAT = 0, it is determined that the portable device has been used last time, that is, the portable device has been detached from the charger, and step S
At 207, the voltage of the charging terminal 2 is checked. V ≧ 4.0
If it is 5 V, the process proceeds to step S211 to complete charging. This is, for example, 4.05V is the minimum battery voltage that can secure the specification of the continuous talk time in the portable device with respect to the full charge voltage of 4.1V, for example, and the charger turns on the red lamp during charging, When fully charged, there is an operation of turning on the green lamp, but with a continuous talk time guarantee voltage of 4.05 V as a threshold, when almost unused (battery voltage drop is small), the red lamp is turned on and the auxiliary charging operation is performed. This is because it is preferable to turn on the green lamp immediately to inform the user of the full charge, rather than turning on. If V <4.05V, it is determined that supplementary charging is necessary, and the process proceeds to the current check and charging operation in step S205 (step S209).
【0016】以上のように、電池10または、携帯機が
第1の充電端子2に未装着の場合は、第1スイッチ3の
開閉動作中に第1の充電端子2に現れる電圧及び電流双
方をチェックすることにより、電池10または、携帯機
が第1の充電端子2に装着されたかどうかを検知する。
また、電池10または、携帯機挿入直後の電池電圧(補
充電要否チェック要)か、充電完了後のままである(補
充電不要)かが挿入記録(BAT=0or1)で判断で
きる。As described above, when the battery 10 or the portable device is not attached to the first charging terminal 2, both the voltage and the current appearing at the first charging terminal 2 during the opening / closing operation of the first switch 3 are reduced. By checking, it is detected whether the battery 10 or the portable device is attached to the first charging terminal 2.
Further, it can be determined from the insertion record (BAT = 0 or 1) whether the battery voltage immediately after the insertion of the battery 10 or the portable device (need to check whether supplementary charging is necessary) or remains after completion of charging (no supplementary charging is necessary).
【0017】実施の形態2.実施の形態1では、ステッ
プS203の端子電圧チェックでV>3.9Vの場合、
電池8または、携帯機挿入直後の電池電圧か充電完了後
の電池電圧かを挿入記録により検知する例を説明した
が、電池電圧の前回データとの記録により検知してもよ
い。Embodiment 2 FIG. In the first embodiment, when V> 3.9V in the terminal voltage check in step S203,
Although an example has been described in which the battery voltage or the battery voltage immediately after the insertion of the portable device or the battery voltage after the completion of charging is detected by insertion recording, the detection may be performed by recording the previous battery voltage data.
【0018】図4は、この発明の実施の形態2を示すフ
ローチャートで、ステップS203でV>3.9Vなら
ば、次のステップS207においても充電端子電圧チェ
ックを行い、V≧4.05Vの場合は、無条件で充電完
了とし、ステップS211へ進む。V<4.05Vの場
合は、ステップS401で、今現在通過したステップS
207での電圧値Vaと前回通過したステップS207
での電圧値Vbを比較し、その差が0.1V以上あれ
ば、電池10または、携帯機が使用の状態から充電器に
挿入されたものと判断し、ステップS205の電流チェ
ック、充電動作(ステップS209)へ進む。0.1V
以下の場合は、充電完了電池の自己放電(電池の単独放
置)または、負荷接続(携帯機の待ち受け電源ON、漏
れ電流等)による電圧降下で補充電不要と判断し、ステ
ップS211の充電完了へ進む。FIG. 4 is a flow chart showing the second embodiment of the present invention. If V> 3.9V in step S203, a charging terminal voltage check is also performed in the next step S207, and if V ≧ 4.05V Indicates that charging is unconditionally completed, and the process proceeds to step S211. If V <4.05 V, in step S401, the current step S
The voltage value Va at step 207 and the previous step S207
And if the difference is 0.1 V or more, it is determined that the battery 10 or the portable device has been inserted into the charger from the state of use, and the current check and the charging operation (step S205) are performed. Proceed to step S209). 0.1V
In the following cases, it is determined that supplementary charging is not required due to self-discharge of the fully charged battery (the battery is left alone) or a voltage drop due to a load connection (standby power ON of the portable device, leakage current, etc.), and the charging in step S211 is completed. move on.
【0019】以上のようにステップS401でステップ
S207での電圧データを比較することにより、ステッ
プS203の端子電圧チェックでV>3.9Vの場合、
電池10または、携帯機挿入直後の電池電圧か充電完了
後の電池電圧かが判断できる。上記以外の動作、構成に
ついては、実施の形態1と同様である。As described above, by comparing the voltage data in step S207 in step S401, if V> 3.9V in the terminal voltage check in step S203,
It can be determined whether the battery voltage is just after the battery 10 or the portable device is inserted or the battery voltage after charging is completed. Operations and configurations other than those described above are the same as those in the first embodiment.
【0020】実施の形態3.図5は、この発明の実施の
形態3を示す回路ブロック図であり、図において、12
は充電器、13は携帯機本体の一対の第2の充電端子、
14は携帯機本体の一対の電池接続端子、15は第2の
充電端子13と電池接続端子14との間に接続された第
2スイッチ、16は充電器12と接続された時のみ動作
する第2スイッチ15を開閉動作させるON/OFF回
路、17は充電器12からの電圧の有無を検出し、携帯
機に信号を送るマイコン等である。尚、第2スイッチ1
5は、トランジスタ、FET等の半導体スイッチ素子に
より構成される。Embodiment 3 FIG. 5 is a circuit block diagram showing Embodiment 3 of the present invention.
Is a charger, 13 is a pair of second charging terminals of the portable device body,
14 is a pair of battery connection terminals of the main body of the portable device, 15 is a second switch connected between the second charging terminal 13 and the battery connection terminal 14, and 16 is a second switch that operates only when connected to the charger 12. An ON / OFF circuit for opening and closing the two switches 15 and a microcomputer 17 for detecting the presence or absence of a voltage from the charger 12 and sending a signal to the portable device. The second switch 1
Reference numeral 5 includes a semiconductor switch element such as a transistor or an FET.
【0021】図6は本発明の検出動作のフローチャート
を示しており、また、図7は各動作の波形図として示し
ている。尚、充電器12の構成、動作については、実施
の形態1で説明したものと同様である。FIG. 6 shows a flowchart of the detection operation of the present invention, and FIG. 7 shows a waveform diagram of each operation. Note that the configuration and operation of the charger 12 are the same as those described in the first embodiment.
【0022】次に図6のフローチャートを基に携帯機に
おける検出動作について説明する。充電動作を行ってい
ない通常は第2スイッチ15の状態はOFFとし、携帯
機は随時第2の充電端子13の電圧チェックを行ってお
り(S601)、携帯機に充電器12が接続された時、
第2の充電端子13には第1スイッチ3のON/OFF
に同期した電圧(Vchg又はVchg47)が現れ、
携帯機内のON/OFF回路16の動作開始電圧(1
V)以上となるので、充電器有り(ステップS602)
と判定し、その電圧によりON/OFF回路16が動作
する(ステップS603)。ON/OFF回路16のO
N(第2スイッチ15はON)時は、充電器12と電池
10を接続し、充電を行う。ON/OFF回路16のO
FF(第2スイッチ15はOFF)時は、充電器12と
電池10を切り離し、第2の充電端子13の電圧をチェ
ックする。第2の充電端子13の電圧が充電器12の第
1スイッチ3のON/OFFに同期した電圧(Vchg
又はVchg47)ならば、充電器接続、0V(1V以
下)の時は充電器未接続(ステップS604)と判断さ
れる。こうして携帯機側で充電器12に挿入されたこ
と、取り外されたことを検知することができ、携帯機が
充電器より取り外された時、(キー操作無しに)自動的
にオフフック状態になることや、表示部の表示を変える
(例えば、「充電中」→通常のスタンバイ表示)等の機
能が実現できる。Next, the detection operation in the portable device will be described with reference to the flowchart of FIG. Normally, when the charging operation is not performed, the state of the second switch 15 is OFF, the portable device checks the voltage of the second charging terminal 13 as needed (S601), and when the charger 12 is connected to the portable device. ,
ON / OFF of the first switch 3 is provided to the second charging terminal 13
Appears, a voltage (Vchg or Vchg47) synchronized with
The operation start voltage of the ON / OFF circuit 16 in the portable device (1
V) or more, so there is a charger (step S602)
And the ON / OFF circuit 16 operates according to the voltage (step S603). O of ON / OFF circuit 16
When N (the second switch 15 is ON), the charger 12 and the battery 10 are connected to perform charging. O of ON / OFF circuit 16
When FF (the second switch 15 is OFF), the charger 12 and the battery 10 are disconnected, and the voltage of the second charging terminal 13 is checked. A voltage (Vchg) in which the voltage of the second charging terminal 13 is synchronized with the ON / OFF of the first switch 3 of the charger 12
Or Vchg 47), it is determined that the charger is connected, and when 0 V (1 V or less), the charger is not connected (step S604). In this way, the portable device can detect that the portable device has been inserted into or removed from the charger 12, and when the portable device is removed from the charger, the portable device automatically goes off-hook (without key operation). And a function of changing the display on the display unit (for example, “charging” → normal standby display).
【0023】[0023]
【発明の効果】充電端子が2端子で、電池を充電する充
電器において、充電端子と電源回路との間に接続された
スイッチと、このスイッチを周期的に開閉動作する開閉
手段と、前記スイッチの開閉動作中に前記充電端子に現
れる電圧を検出する電圧検出手段と、前記充電端子と前
記電源回路間に流れる電流を検出する電流検出手段と、
これらの検出手段の検出結果に基づいて電池の装着の有
無を検知する検知手段を備えたことにより、電池の有無
検出を簡単にして確実に可能としたことにある。According to the present invention, in a charger for charging a battery having two charging terminals, a switch connected between the charging terminal and a power supply circuit, opening and closing means for periodically opening and closing the switch, and the switch Voltage detecting means for detecting a voltage appearing at the charging terminal during the opening and closing operation of the, current detecting means for detecting a current flowing between the charging terminal and the power supply circuit,
It is another object of the present invention to provide a detection means for detecting the presence or absence of a battery based on the detection results of these detection means, thereby enabling simple and reliable detection of the presence or absence of a battery.
【0024】第1の充電端子が2端子で、この第1の充
電端子と電源回路との間に接続された第1のスイッチ
と、この第1のスイッチを周期的に開閉動作する開閉手
段と、前記第1のスイッチの開閉動作中に前記第1の充
電端子に現れる電圧を検出する電圧検出手段と、前記第
1の充電端子と前記電源回路間に流れる電流を検出する
電流検出手段と、これらの検出手段の検出結果に基づい
て電池の装着の有無を検知する検知手段とを備えた充電
器及び、前記第1の充電端子に接離する第2の充電端子
と、この充電端子と電池との間に接続された第2のスイ
ッチと、この第2のスイッチを周期的に開閉動作する開
閉手段と、前記第2のスイッチの開閉動作中に前記第2
の充電端子に現れる電圧を検出する電圧検出手段と、こ
の検出手段の検出結果に基づいて充電器の装着の有無を
検知する検知手段とを備えた携帯機を有し、充電器及び
携帯機が相互の装着の有無を検出することを可能とした
ことにある。The first charging terminal has two terminals, a first switch connected between the first charging terminal and the power supply circuit, and opening / closing means for periodically opening / closing the first switch. Voltage detecting means for detecting a voltage appearing at the first charging terminal during opening and closing operations of the first switch; current detecting means for detecting a current flowing between the first charging terminal and the power supply circuit; A charger provided with detection means for detecting the presence or absence of a battery based on the detection results of these detection means, a second charging terminal which comes into contact with and separates from the first charging terminal, A second switch connected between the second switch and the second switch, a switch for periodically opening and closing the second switch, and the second switch during opening and closing of the second switch.
And a detecting device for detecting whether or not the charger is mounted based on the detection result of the detecting device. Another object of the present invention is to make it possible to detect the presence or absence of mutual attachment.
【図1】 この発明の実施の形態1を示す充電器の回路
ブロック図である。FIG. 1 is a circuit block diagram of a charger according to Embodiment 1 of the present invention.
【図2】 実施の形態1の動作手順を示すフローチャー
トである。FIG. 2 is a flowchart illustrating an operation procedure according to the first embodiment;
【図3】 実施の形態1の各動作の波形図である。FIG. 3 is a waveform chart of each operation of the first embodiment.
【図4】 実施の形態2の動作手順を示すフローチャー
トである。FIG. 4 is a flowchart showing an operation procedure according to the second embodiment.
【図5】 この発明の実施の形態3における携帯機の回
路ブロック図である。FIG. 5 is a circuit block diagram of a portable device according to Embodiment 3 of the present invention.
【図6】 実施の形態3における携帯機の動作手順を示
すフローチャートである。FIG. 6 is a flowchart showing an operation procedure of the portable device according to the third embodiment.
【図7】 実施の形態3における携帯機の各動作の波形
図である。FIG. 7 is a waveform chart of each operation of the portable device in the third embodiment.
1 電源回路 2 第1の充電端子 3 第1スイッチ 4 抵抗 5 電流検出抵抗 6 充電電流検出回路 7 電圧検出抵抗 8 電圧検出回路 9 充電制御回路 10 電池 11 電池の被充電端子 12 充電器 13 第2の充電端子 14 電池接続端子 15 第2スイッチ 16 ON/OFF回路 17 マイコン Reference Signs List 1 power supply circuit 2 first charging terminal 3 first switch 4 resistor 5 current detection resistor 6 charging current detection circuit 7 voltage detection resistor 8 voltage detection circuit 9 charge control circuit 10 battery 11 battery charged terminal 12 charger 13 second Charging terminal 14 battery connection terminal 15 second switch 16 ON / OFF circuit 17 microcomputer
Claims (2)
電器において、充電端子と電源回路との間に接続された
スイッチと、このスイッチを周期的に開閉動作する開閉
手段と、前記スイッチの開閉動作中に前記充電端子に現
れる電圧を検出する電圧検出手段と、前記充電端子と前
記電源回路間に流れる電流を検出する電流検出手段と、
これらの検出手段の検出結果に基づいて電池の装着の有
無を検知する検知手段を備えたことを特徴とする充電
器。1. A charger for charging a battery having two charging terminals, a switch connected between the charging terminal and a power supply circuit, opening and closing means for periodically opening and closing the switch, and the switch Voltage detecting means for detecting a voltage appearing at the charging terminal during the opening and closing operation of the, current detecting means for detecting a current flowing between the charging terminal and the power supply circuit,
A battery charger comprising a detecting means for detecting whether or not a battery is mounted based on a detection result of the detecting means.
充電端子と電源回路との間に接続された第1のスイッチ
と、この第1のスイッチを周期的に開閉動作する開閉手
段と、前記第1のスイッチの開閉動作中に前記第1の充
電端子に現れる電圧を検出する電圧検出手段と、前記第
1の充電端子と前記電源回路間に流れる電流を検出する
電流検出手段と、これらの検出手段の検出結果に基づい
て電池の装着の有無を検知する検知手段とを備えた充電
器及び、前記第1の充電端子に接離する第2の充電端子
と、この充電端子と電池との間に接続された第2のスイ
ッチと、この第2のスイッチを周期的に開閉動作する開
閉手段と、前記第2のスイッチの開閉動作中に前記第2
の充電端子に現れる電圧を検出する電圧検出手段と、こ
の検出手段の検出結果に基づいて充電器の装着の有無を
検知する検知手段とを備えた携帯機を有し、充電器及び
携帯機が相互の装着の有無を検出することを可能とした
ことを特徴とする携帯機の充電システム。And a first switch connected between the first charging terminal and a power supply circuit, and an opening and closing device for periodically opening and closing the first switch. Means, voltage detecting means for detecting a voltage appearing at the first charging terminal during opening and closing operations of the first switch, and current detecting means for detecting a current flowing between the first charging terminal and the power supply circuit A charger having detection means for detecting the presence or absence of a battery based on the detection results of these detection means, a second charging terminal which comes into contact with and separates from the first charging terminal, A second switch connected between the second switch and the battery; opening and closing means for periodically opening and closing the second switch; and a second switch during opening and closing of the second switch.
And a detecting device for detecting whether or not the charger is mounted based on the detection result of the detecting device. A charging system for a portable device, characterized in that it is possible to detect the presence or absence of mutual mounting.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9028640A JPH10225001A (en) | 1997-02-13 | 1997-02-13 | Charger and charging system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9028640A JPH10225001A (en) | 1997-02-13 | 1997-02-13 | Charger and charging system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10225001A true JPH10225001A (en) | 1998-08-21 |
Family
ID=12254133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9028640A Pending JPH10225001A (en) | 1997-02-13 | 1997-02-13 | Charger and charging system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10225001A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005083865A1 (en) * | 2004-03-01 | 2005-09-09 | Ricoh Company, Ltd. | Battery connection detection circuit |
US7479765B2 (en) | 2006-02-28 | 2009-01-20 | Ricoh Company, Ltd. | Integrated circuit for controlling charging, charging device using the integrated circuit, and method for detecting connection of secondary battery |
US7649343B2 (en) | 2006-02-28 | 2010-01-19 | Ricoh Company, Ltd. | Charge control circuit, charging device, and connection checking method |
-
1997
- 1997-02-13 JP JP9028640A patent/JPH10225001A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005083865A1 (en) * | 2004-03-01 | 2005-09-09 | Ricoh Company, Ltd. | Battery connection detection circuit |
CN100420121C (en) * | 2004-03-01 | 2008-09-17 | 株式会社理光 | Battery connection detection circuit |
KR100863257B1 (en) * | 2004-03-01 | 2008-10-15 | 가부시키가이샤 리코 | Battery connection detection circuit |
US7629775B2 (en) | 2004-03-01 | 2009-12-08 | Ricoh Company, Ltd. | Battery connection detection circuit |
US7479765B2 (en) | 2006-02-28 | 2009-01-20 | Ricoh Company, Ltd. | Integrated circuit for controlling charging, charging device using the integrated circuit, and method for detecting connection of secondary battery |
US7649343B2 (en) | 2006-02-28 | 2010-01-19 | Ricoh Company, Ltd. | Charge control circuit, charging device, and connection checking method |
US7671564B2 (en) | 2006-02-28 | 2010-03-02 | Ricoh Company, Ltd. | Integrated circuit for controlling charging, charging device using the integrated circuit, and method for detecting connection of secondary battery |
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