JPH099519A - Charger - Google Patents
ChargerInfo
- Publication number
- JPH099519A JPH099519A JP7154662A JP15466295A JPH099519A JP H099519 A JPH099519 A JP H099519A JP 7154662 A JP7154662 A JP 7154662A JP 15466295 A JP15466295 A JP 15466295A JP H099519 A JPH099519 A JP H099519A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- type
- charger
- battery pack
- charging
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、携帯電話機等などの機
器に用いられる電池パック内の二次電池を充電する充電
器に係り、特に電池パック内の電池がニッケルカドミウ
ム蓄電池、ニッケル水素蓄電池、リチウムイオン二次電
池のように多種類存在している電池パックに対応可能な
充電器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charger for charging a secondary battery in a battery pack used in a device such as a mobile phone, and in particular, a battery in the battery pack is a nickel-cadmium storage battery, a nickel-hydrogen storage battery, The present invention relates to a charger compatible with various types of battery packs such as lithium-ion secondary batteries.
【0002】[0002]
【従来の技術】ニッケルカドミウム蓄電池、ニッケル水
素蓄電池およびリチウムイオン二次電池などの二次電池
は、小型軽量化を志向する携帯型パーソナルコンピュー
タ、携帯電話機、ビデオカメラなどに代表されるコード
レスタイプの民生機器の電源として多用されている。2. Description of the Related Art Secondary batteries such as nickel-cadmium storage batteries, nickel-hydrogen storage batteries and lithium-ion secondary batteries are cordless type consumer products typified by portable personal computers, mobile phones, video cameras and the like, which are aimed at downsizing and weight reduction. It is often used as a power source for equipment.
【0003】最近、一つの応用機種に対応した電池パッ
クとして、内蔵電池の種類が異なる複数種類の電池パッ
クが用意されるようになってきた。例えば、携帯電話機
においては、低価格のものはニッケルカドミウム蓄電池
を内蔵した電池パック、高容量のものはニッケル水素蓄
電池を内蔵した電池パック、小型軽量のものはリチウム
イオン二次電池を内蔵した電池パックというように、ユ
ーザが目的に応じて電池パックを使い分けられるように
している。Recently, a plurality of types of battery packs having different types of built-in batteries have been prepared as battery packs corresponding to one applied model. For example, among mobile phones, low-priced ones have a nickel-cadmium storage battery built-in, high-capacity ones have a nickel-hydrogen storage battery built-in, and small and lightweight ones have a lithium-ion secondary battery built-in battery pack. In this way, the user can use the battery pack properly according to the purpose.
【0004】このように一つの応用機種に対して、内蔵
電池の異なる複数種類の電池パックを用意する場合、充
電器としてはこれらの電池パックに共用できるものが望
まれる。そのような充電器においては、電池パックの種
類によって電池の最適な充電制御方式が異なるため、電
池パックが充電器にセットされたとき初めに電池パック
の種類、つまり内蔵電池の種類を自動判別し、その電池
に適した充電制御方式を選択して充電を行う必要があ
る。As described above, when a plurality of types of battery packs having different built-in batteries are prepared for one applied model, it is desired that the charger be a battery charger that can be shared by these battery packs. In such a charger, the optimal charging control method for the battery differs depending on the type of battery pack, so when the battery pack is set in the charger, the type of battery pack, that is, the type of built-in battery is automatically determined first. , It is necessary to select a charging control method suitable for the battery and perform charging.
【0005】電池パックの種類(内蔵電池の種類)を自
動判別する方法として、従来から種々の方法が考えられ
てきている。例えば、特開平2−299428公報に
は、図2に示すように電池パック20内に任意の値の電
池判別用抵抗27を設けてその両端を電池25のマイナ
ス端子22と判別出力端子24に接続し、充電器で端子
22,24を介して抵抗27の値を検出し、この検出し
た抵抗値から電池パック20の種類、つまり二次電池2
5の種類を自動判別するようにした充電器が開示されて
いる。Conventionally, various methods have been considered as methods for automatically determining the type of battery pack (type of built-in battery). For example, in Japanese Unexamined Patent Publication No. 2-299428, as shown in FIG. 2, a battery discriminating resistor 27 having an arbitrary value is provided in a battery pack 20 and both ends thereof are connected to a negative terminal 22 of a battery 25 and a discriminating output terminal 24. Then, the charger detects the value of the resistor 27 via the terminals 22 and 24, and the type of the battery pack 20, that is, the secondary battery 2 is detected from the detected resistance value.
There is disclosed a charger configured to automatically discriminate 5 types.
【0006】また、特開平7−31071公報には、図
2において二次電池25の内部インピーダンスをプラス
端子21とマイナス端子22を介して測定し、そのイン
ピーダンス値から電池パック20の種類、つまり電池2
5の種類を自動判別するようにした充電器が開示されて
いる。Further, in Japanese Unexamined Patent Publication No. 7-31071, the internal impedance of the secondary battery 25 in FIG. 2 is measured via a plus terminal 21 and a minus terminal 22, and the type of the battery pack 20, that is, the battery, is determined from the impedance value. Two
There is disclosed a charger configured to automatically discriminate 5 types.
【0007】これらの方法は、いずれも電池パックの電
気的特性を利用して内蔵電池の種類を自動判別する方法
であるが、この他に、電池パックに貼付されたバーコー
ドから電池の種類を自動判別したり、電池パックのパッ
クの外形形状をそれぞれ異ならせてその形状から電池の
種類を自動判別する、いわゆる機械的な判別方法もあ
る。しかしながら、後者の機械的な自動判別方法では充
電器内に充電回路以外の付加回路や検出部が加わるた
め、充電器の大きさが増大したり価格が上昇するなどの
点から実用的でなく、前者の電気的特性を利用した自動
判別方法が多用されている。All of these methods are methods for automatically determining the type of the built-in battery by utilizing the electrical characteristics of the battery pack. In addition to this, the type of the battery can be determined from the bar code attached to the battery pack. There is also a so-called mechanical determination method in which automatic determination is performed or the outer shape of a battery pack is made different to automatically determine the type of battery from the shape. However, in the latter mechanical automatic identification method, since an additional circuit other than the charging circuit and a detection unit are added in the charger, it is not practical from the viewpoint of increasing the size of the charger or increasing the price, The automatic identification method utilizing the former electrical characteristics is widely used.
【0008】[0008]
【発明が解決しようとする課題】上述した電池パックの
電気的特性を利用して内蔵電池の種類を自動判別する充
電器においては、図2を用いて説明したように電池パッ
クの端子を介して電池パック内に設けられている抵抗の
値や電池のインピーダンスを検出することで、内蔵電池
の種類を自動判別している。このため、電池パックの端
子が汚れていた場合や劣化していた場合、あるいは電池
パックの端子と充電器側の端子が正しく接触しない場合
には、電池パックの端子と充電器側の端子との間の接触
抵抗が変化し、その影響で電池種類の自動判別を誤って
しまうことがある。さらに、電池パックの製造時の抵抗
の付け間違い、抵抗の接続不良、電池自体の劣化による
内部インピーダンスの変化によっても、電池種類の自動
判別を誤ってしまう可能性がある。In the battery charger which automatically determines the type of the built-in battery by utilizing the electrical characteristics of the battery pack described above, as described with reference to FIG. The type of the built-in battery is automatically determined by detecting the resistance value and the battery impedance provided in the battery pack. Therefore, if the terminals of the battery pack are dirty or deteriorated, or if the terminals of the battery pack and the terminals on the charger side do not contact properly, make sure that the terminals of the battery pack and the terminals on the charger side are The contact resistance between them may change, and due to the influence, the automatic determination of the battery type may be erroneous. Further, there is a possibility that the automatic determination of the battery type may be erroneous due to a wrong mounting of the resistor at the time of manufacturing the battery pack, a poor connection of the resistor, or a change in the internal impedance due to deterioration of the battery itself.
【0009】このように充電器が電池パックに内蔵され
た電池の種類を誤判別したまま充電を行うと、電池パッ
ク内の電池はその電池の種類に不適な充電制御方式で充
電されるため、電池が充電されなかったり、電池の劣化
を早めたり、また最悪の場合は電池を破裂させてしまう
などの問題が生じるという問題があった。本発明は、電
池パックに内蔵された電池の種類を誤って自動判別した
ときにもそれを容易に認識できるようにした充電器を提
供することを目的とする。As described above, if the charger performs charging while erroneously discriminating the type of the battery contained in the battery pack, the battery in the battery pack is charged by the charging control method which is not suitable for the type of the battery. There are problems that the battery is not charged, the battery deteriorates quickly, and in the worst case, the battery explodes. It is an object of the present invention to provide a battery charger that can easily recognize the type of a battery built in a battery pack even if the battery type is automatically identified by mistake.
【0010】[0010]
【課題を解決するための手段】上記の課題を解決するた
め、本発明は二次電池を内蔵した電池パックの電気的特
性から二次電池の種類を自動判別し、その判別結果に基
づいて決定される充電制御方式で二次電池を充電する充
電器において、二次電池の種類判別結果に基づいて電池
パックに内蔵されている二次電池の種類を表示する電池
種類表示手段を有することを特徴とする。この電池種類
表示手段は、例えばニッケルカドミウム蓄電池、ニッケ
ル水素蓄電池、リチウムイオン二次電池といった二次電
池の種類に対応してそれぞれ設けられたLEDのような
発光素子を選択的に表示させることにより、電池種類の
表示を行うものとする。In order to solve the above problems, the present invention automatically determines the type of the secondary battery from the electrical characteristics of the battery pack containing the secondary battery, and determines based on the determination result. In a charger for charging a secondary battery according to the charging control method described above, the battery type display means for displaying the type of the secondary battery incorporated in the battery pack based on the type determination result of the secondary battery is characterized. And This battery type display means selectively displays light emitting elements such as LEDs provided corresponding to the types of secondary batteries such as nickel-cadmium storage batteries, nickel-hydrogen storage batteries, and lithium-ion secondary batteries, The battery type shall be displayed.
【0011】[0011]
【作用】このように構成された本発明の充電器では、充
電を行っている電池パックの種類、すなわち電池パック
に内蔵されている電池の種類を外部から容易に認識でき
るので、万一、充電器が電池パックの種類を誤判別して
充電を開始した場合においても、使用者は直ちに誤判別
したことを認識して充電を止めるなどの対応をとること
ができる。With the charger of the present invention having the above-described structure, the type of the battery pack being charged, that is, the type of the battery contained in the battery pack can be easily recognized from the outside. Even when the container misjudges the type of the battery pack and starts charging, the user can immediately recognize the misjudgment and stop the charging.
【0012】[0012]
【実施例】以下、本発明の実施例を図面を参照して説明
する。図1は本発明の一実施例に係る充電器の構成を示
すブロック図、図3は充電器および電池パックの外観図
である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a charger according to an embodiment of the present invention, and FIG. 3 is an external view of a charger and a battery pack.
【0013】図1に示す充電器は、充電用電源+Vに接
続された充電制御回路1と、マイクロコンピュータ2
と、LED3,4,5と、AND回路6,7,8および
電池パック20に接続される外部接続端子11,12,
13,14からなる。端子11はプラス充電端子、端子
12はマイナス充電端子、端子13は温度測定用入力端
子、端子14は判別用入力端子である。また、マイクロ
コンピュータ2は主として電池種類判別部2aと充電制
御部2bおよびLED表示制御部2cを構成している。The charger shown in FIG. 1 comprises a charging control circuit 1 connected to a charging power source + V and a microcomputer 2
, The LEDs 3, 4, 5 and the external connection terminals 11, 12, connected to the AND circuits 6, 7, 8 and the battery pack 20,
It consists of 13 and 14. The terminal 11 is a positive charging terminal, the terminal 12 is a negative charging terminal, the terminal 13 is a temperature measurement input terminal, and the terminal 14 is a discrimination input terminal. The microcomputer 2 mainly comprises a battery type determination unit 2a, a charging control unit 2b, and an LED display control unit 2c.
【0014】LED3,4,5は図3に示すように充電
器の筐体30に設けられ、電池パック20に内蔵された
二次電池25の種類を表示するためのものであり、LE
D3はニッケルカドミウム蓄電池、LED4はニッケル
水素蓄電池、LED5はリチウムイオン二次電池にそれ
ぞれ対応しているものとする。The LEDs 3, 4, and 5 are provided in the housing 30 of the charger as shown in FIG. 3, and are for displaying the type of the secondary battery 25 incorporated in the battery pack 20.
It is assumed that D3 corresponds to a nickel-cadmium storage battery, LED4 corresponds to a nickel-hydrogen storage battery, and LED5 corresponds to a lithium-ion secondary battery.
【0015】一方、充電器によって充電が行われる電池
パック20は、二次電池25と、サーミスタ26と、電
池判別用抵抗27および充電時に充電器の外部接続端子
11,12,13,14にそれぞれ接続される外部接続
端子21,22,23,24からなる。端子21はプラ
ス端子21、端子22はマイナス端子、端子23は温度
測定用出力端子、端子24は判別用出力端子である。二
次電池25には例えばニッケルカドミウム蓄電池、ニッ
ケル水素蓄電池、リチウムイオン二次電池の種類があ
り、電池判別用抵抗27はこれらの電池の種類に対応し
た大きさの抵抗値に設定される。例えば、電池25がニ
ッケルカドミウム蓄電池であれば1kΩ、ニッケル水素
蓄電池であれば10kΩ、リチウムイオン二次電池であ
れば50kΩというように電池判別用抵抗27の抵抗値
は設定される。On the other hand, the battery pack 20 charged by the charger has a secondary battery 25, a thermistor 26, a battery discriminating resistor 27 and external connection terminals 11, 12, 13, 14 of the charger at the time of charging, respectively. The external connection terminals 21, 22, 23, and 24 are connected. The terminal 21 is a plus terminal 21, the terminal 22 is a minus terminal, the terminal 23 is a temperature measurement output terminal, and the terminal 24 is a discrimination output terminal. The secondary battery 25 includes, for example, types of nickel-cadmium storage battery, nickel-hydrogen storage battery, and lithium-ion secondary battery, and the battery discrimination resistor 27 is set to a resistance value having a size corresponding to these types of batteries. For example, the resistance value of the battery discriminating resistor 27 is set such that the battery 25 is 1 kΩ when the battery is a nickel-cadmium storage battery, 10 kΩ when it is a nickel-hydrogen storage battery, and 50 kΩ when it is a lithium ion secondary battery.
【0016】次に、本実施例の充電器の動作を説明す
る。電池パック20が充電器にセットされると、マイク
ロコンピュータ2の電池種類判別部2aは、電池パック
20の判別出力端子24とマイナス端子22間に電流を
流して電池判別用抵抗27の電圧降下を検出することに
よって、電池25の種類を判別する。すなわち、電池判
別用抵抗27は上述のように電池25の種類によって抵
抗値を変えてあるので、抵抗27の電圧降下の違いから
電池種類判別部2aは電池25の種類を判別することが
できる。この判別の結果、電池種類判別部2aは電池2
5の種類に対応した判別出力を充電制御部2bへ送る。Next, the operation of the charger of this embodiment will be described. When the battery pack 20 is set in the charger, the battery type determination unit 2a of the microcomputer 2 causes a current to flow between the determination output terminal 24 and the negative terminal 22 of the battery pack 20 to cause the voltage drop of the battery determination resistor 27. By detecting, the type of the battery 25 is determined. That is, since the resistance value of the battery discriminating resistor 27 is changed depending on the type of the battery 25 as described above, the battery type discriminating unit 2a can discriminate the type of the battery 25 from the difference in the voltage drop of the resistor 27. As a result of this determination, the battery type determination unit 2a determines that the battery 2
The discrimination output corresponding to the five types is sent to the charging control unit 2b.
【0017】充電制御部2bは、電池種類判別部2aか
らの判別出力に基づいて電池パック20内の電池25の
種類に適合した充電制御信号を充電制御回路1へ出力す
る。ここで、充電制御部2bは充電制御信号を出力する
ための信号線として3本の出力線9a,9b,9cを有
し、出力線9aをニッケルカドミウム蓄電池用、出力線
9bをニッケル水素蓄電池用、出力線9cをリチウムイ
オン二次電池用としている。The charging control unit 2b outputs a charging control signal suitable for the type of the battery 25 in the battery pack 20 to the charging control circuit 1 based on the discrimination output from the battery type discrimination unit 2a. Here, the charging control unit 2b has three output lines 9a, 9b, 9c as signal lines for outputting a charging control signal, the output line 9a for nickel-cadmium storage battery and the output line 9b for nickel-hydrogen storage battery. The output line 9c is for a lithium ion secondary battery.
【0018】充電制御回路1は、これらの出力線9a,
9b,9cを介して入力された充電制御信号に基づい
て、電池パック20内の電池25の種類に適した方式で
充電制御を行う。具体的には、例えば電池25がニッケ
ルカドミウム蓄電池の場合は一定電流で充電し、電池2
5の端子電圧が所定値(ΔV)低下したとき充電電流を
停止させるか減少させる「−ΔV制御」で充電制御を行
う。また、電池25がニッケル水素蓄電池の場合は一定
電流で充電し、電池温度の上昇率(いわゆる温度微分)
が所定値に達したとき充電電流を停止させるか減少させ
る「dT/dt制御」で充電制御を行う。さらに、二次
電池25がリチウムイオン二次電池の場合は充電初期で
は定電流で充電し、電池電圧が所定値(例えば4.2V
/セル)に達すると定電圧で充電する「定電流・定電圧
充電」で充電制御を行う。The charging control circuit 1 uses these output lines 9a,
Based on the charge control signal input via 9b and 9c, charge control is performed by a method suitable for the type of the battery 25 in the battery pack 20. Specifically, for example, when the battery 25 is a nickel-cadmium storage battery, the battery 2 is charged with a constant current.
When the terminal voltage of 5 drops by a predetermined value (ΔV), the charging current is stopped or reduced, and the charging control is performed by “−ΔV control”. When the battery 25 is a nickel-hydrogen storage battery, it is charged with a constant current to increase the battery temperature (so-called temperature differential).
The charging control is performed by "dT / dt control" that stops or decreases the charging current when reaches a predetermined value. Furthermore, when the secondary battery 25 is a lithium-ion secondary battery, the battery is charged at a constant current in the initial charging, and the battery voltage has a predetermined value (for example, 4.2 V).
/ Cell), the charging is controlled by "constant current / constant voltage charging", which charges at a constant voltage.
【0019】一方、LED表示制御部2cは電池種類判
別部2aからの判別出力に基づいてLED3,4,5の
いずれかを選択的に発光させるための発光制御信号を出
力する。ここで、LED表示制御部2cの出力端子とL
ED3,4,5との間には、LED表示制御部2cから
の発光制御信号と出力線9a,9b,9c上の充電制御
信号との論理積をとるAND回路6,7,8が挿入さ
れ、判別した電池に対応するLEDのみを発光させるよ
うに構成されている。On the other hand, the LED display control section 2c outputs a light emission control signal for selectively causing one of the LEDs 3, 4, 5 to emit light based on the discrimination output from the battery type discrimination section 2a. Here, the output terminal of the LED display controller 2c and L
Between the EDs 3, 4 and 5, AND circuits 6, 7 and 8 which take a logical product of the light emission control signal from the LED display control section 2c and the charge control signal on the output lines 9a, 9b and 9c are inserted. The LED corresponding to the determined battery is configured to emit light.
【0020】例えば、電池種類判別部2aが電池パック
20の電池25をニッケル水素蓄電池と判別すると、充
電制御部2bは出力線9bのみをON状態として充電制
御回路1を制御する。出力線9bがON状態になると、
LED表示制御部2cから発光制御信号が出力された時
点でAND回路7の出力がONとなり、ニッケル水素蓄
電池用LED4が発光する。このとき、他の出力線9
a,9bはOFF状態になっているので、LED表示制
御部2cから発光制御信号が出力されてもAND回路
6,8の出力はOFFのままであり、ニッケルカドミウ
ム蓄電池用LED3とリチウムイオン二次電池用LED
5は発光しない。For example, when the battery type discriminating unit 2a discriminates the battery 25 of the battery pack 20 as a nickel-hydrogen storage battery, the charging control unit 2b controls the charging control circuit 1 with only the output line 9b in the ON state. When the output line 9b is turned on,
When the light emission control signal is output from the LED display control unit 2c, the output of the AND circuit 7 is turned on, and the nickel hydride storage battery LED 4 emits light. At this time, the other output line 9
Since a and 9b are in the OFF state, the outputs of the AND circuits 6 and 8 remain OFF even when the light emission control signal is output from the LED display control unit 2c, and the LED 3 for the nickel-cadmium storage battery and the lithium-ion secondary battery. LED for battery
5 does not emit light.
【0021】なお、上述した実施例では電池判別用抵抗
27の抵抗値の違いによって電池25の種類を判別した
が、電池の種類の判別手段はこれに限られるものではな
く、他の判別手段を用いた場合にも本発明を適用するこ
とができる。In the above-described embodiment, the type of the battery 25 is discriminated by the difference in the resistance value of the battery discriminating resistor 27, but the discriminating means of the battery type is not limited to this, and other discriminating means may be used. The present invention can be applied when used.
【0022】[0022]
【発明の効果】以上説明したように、本発明による充電
器によれば、電池パック内の電池を充電する際、充電対
象の電池の種類を外部からLEDの発光などによって容
易に認識することができる。従って、万一、充電器が電
池パックの種類を間違って判別しても、それを外部から
容易に判定できるので、充電を直ちに止めるなどの適切
な対応をとることが可能となり、電池パックの破裂・発
火・爆発などの危険を回避することができる。As described above, according to the charger of the present invention, when the battery in the battery pack is charged, the type of the battery to be charged can be easily recognized from the outside by the light emission of the LED or the like. it can. Therefore, even if the charger mistakenly identifies the type of battery pack, it can be easily determined from the outside, so it is possible to take appropriate measures such as immediately stopping charging, and the battery pack may burst.・ It is possible to avoid danger such as ignition and explosion.
【図1】本発明の一実施例に係る充電器の構成を示すブ
ロック図FIG. 1 is a block diagram showing a configuration of a charger according to an embodiment of the present invention.
【図2】電池判別用抵抗を内蔵した電池パックの内部回
路図FIG. 2 is an internal circuit diagram of a battery pack having a battery discrimination resistor built-in.
【図3】同実施例に係る充電器の外観図FIG. 3 is an external view of a charger according to the embodiment.
1…充電制御回路 2…マイクロコンピュータ 3,4,5…LED 6,7,8…AND回路 9a,9b,9c…出力線 11…プラス充電端子 12…マイナス充電端子 13…温度測定用入力端子 14…判別用入力端子 20…電池パック 21…プラス端子 22…マイナス端子 23…温度測定用出力端子 24…判別用出力端子 25…二次電池 26…サーミスタ 27…電池判別用抵抗 30…充電器筐体 1 ... Charging control circuit 2 ... Microcomputer 3, 4, 5 ... LED 6, 7, 8 ... AND circuit 9a, 9b, 9c ... Output line 11 ... Positive charging terminal 12 ... Negative charging terminal 13 ... Temperature measurement input terminal 14 ... discrimination input terminal 20 ... battery pack 21 ... plus terminal 22 ... minus terminal 23 ... temperature measurement output terminal 24 ... discrimination output terminal 25 ... secondary battery 26 ... thermistor 27 ... battery discrimination resistor 30 ... charger housing
Claims (2)
性から該二次電池の種類を自動判別し、その判別結果に
基づいて決定される充電制御方式で該二次電池を充電す
る充電器において、 前記判別結果に基づいて前記電池パックに内蔵されてい
る二次電池の種類を表示する電池種類表示手段を有する
ことを特徴とする充電器。1. A charging method in which a type of the secondary battery is automatically discriminated from the electrical characteristics of a battery pack containing the secondary battery, and the secondary battery is charged by a charging control method determined based on the discrimination result. The battery charger includes a battery type display unit that displays a type of a secondary battery built in the battery pack based on the determination result.
に対応してそれぞれ設けられた複数の発光素子を選択的
に表示させることにより、二次電池の種類を表示するも
のであることを特徴とする請求項1記載の充電器。2. The battery type display means displays the type of the secondary battery by selectively displaying a plurality of light emitting elements provided corresponding to the type of the secondary battery. The charger according to claim 1, wherein:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7154662A JPH099519A (en) | 1995-06-21 | 1995-06-21 | Charger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7154662A JPH099519A (en) | 1995-06-21 | 1995-06-21 | Charger |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH099519A true JPH099519A (en) | 1997-01-10 |
Family
ID=15589155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7154662A Pending JPH099519A (en) | 1995-06-21 | 1995-06-21 | Charger |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH099519A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007003374A (en) * | 2005-06-24 | 2007-01-11 | Pentax Corp | Battery check device |
-
1995
- 1995-06-21 JP JP7154662A patent/JPH099519A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007003374A (en) * | 2005-06-24 | 2007-01-11 | Pentax Corp | Battery check device |
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