JP3190854B2 - Charger - Google Patents
ChargerInfo
- Publication number
- JP3190854B2 JP3190854B2 JP13400497A JP13400497A JP3190854B2 JP 3190854 B2 JP3190854 B2 JP 3190854B2 JP 13400497 A JP13400497 A JP 13400497A JP 13400497 A JP13400497 A JP 13400497A JP 3190854 B2 JP3190854 B2 JP 3190854B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- charging
- battery
- battery pack
- temperature 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.)
- Expired - Fee Related
Links
- 238000007600 charging Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は充電器に関し、特に
携帯電話機などに使用されるニッケル・カドミウム電池
およびニッケル・水素電池の二次電池をパックした電池
パックの充電器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charger, and more particularly, to a battery pack charger in which a nickel-cadmium battery and a nickel-hydrogen battery are used.
【０００２】[0002]
【従来の技術】従来、この種の充電器は二次電池の温度
上昇を利用し充電制御する方法が用いられている。ニッ
ケル・カドミウム電池などは充電が進行し満充電状態に
なると化学エネルギーの蓄積能力が限界に達して、充電
電流の電気エネルギーが化学エネルギーに変換されずに
熱エネルギーへと変換される。その結果二次電池が温度
上昇することになる。この温度上昇を検出し充電電流を
遮断している。2. Description of the Related Art Heretofore, for this type of charger, a method of controlling charging using the temperature rise of a secondary battery has been used. When a nickel-cadmium battery or the like is charged and progresses to a fully charged state, the ability to accumulate chemical energy reaches a limit, and the electric energy of the charging current is converted into thermal energy without being converted into chemical energy. As a result, the temperature of the secondary battery rises. By detecting this temperature rise, the charging current is cut off.
【０００３】例えばこの技術を利用した特開平８−３２
９９９２号公報記載の充電器がある。図２はこの従来例
を示すブロック図である。本従来例は電池パック内に設
けられた温度検出用のサーミスタの検出用端子を充電用
端子とを共通にしたことを特徴とするものである。For example, Japanese Patent Application Laid-Open No. 8-32 utilizing this technique
There is a charger described in Japanese Patent No. 9992. FIG. 2 is a block diagram showing this conventional example. This conventional example is characterized in that a detection terminal of a thermistor for temperature detection provided in a battery pack is shared with a charging terminal.
【０００４】即ち、電池パック２９内に設けられたサー
ミスタ３１の抵抗値を電圧検出回路２６で読み取るが、
切替スイッチ２５はパルス発生回路２３からの制御信号
により、充電端子２７ａ，２７ｂを定電流回路２１側と
定電圧回路２２側とに切替えており、常時は定電流回路
２１側に切替えて電池パック２９へ充電し、短時間間欠
的に定電圧回路２２側へ切替えることにより電池電圧よ
り低い定電圧でサーミスタの抵抗値を測定している。[0004] That is, the resistance value of the thermistor 31 provided in the battery pack 29 is read by the voltage detection circuit 26.
The changeover switch 25 switches the charging terminals 27 a and 27 b between the constant current circuit 21 side and the constant voltage circuit 22 side by a control signal from the pulse generation circuit 23. , And the resistance value of the thermistor is measured at a constant voltage lower than the battery voltage by intermittently switching to the constant voltage circuit 22 for a short period of time.
【０００５】[0005]
【発明が解決しようとする課題】このように従来例にお
いては、温度検出素子を電池パック内に設けてあるの
で、例え温度検出用端子を充電用端子とを共用しても温
度検出素子を内蔵しているので電池パックが大形になる
問題がある。また二次電池は寿命があり、その交換の都
度温度検出素子を含めて電池パック単位で交換すること
は無駄が発生する問題がある。As described above, in the conventional example, since the temperature detecting element is provided in the battery pack, the temperature detecting element is built in even if the temperature detecting terminal is shared with the charging terminal. There is a problem that the battery pack becomes large in size. In addition, the secondary battery has a lifetime, and it is wasteful to replace the secondary battery including the temperature detecting element in each battery pack every time the secondary battery is replaced.
【０００６】[0006]
【課題を解決するための手段】本発明の充電器は、電池
パックに収容された二次電池を充電する際に前記二次電
池の温度上昇により満充電状態を検出して充電を停止す
る充電器において、前記電池パックの表面に接触し接触
したことと温度上昇とを検出する温度検出手段と前記温
度検出手段の出力信号で充電の開始と停止とを制御する
制御手段とを備えている。SUMMARY OF THE INVENTION A battery charger according to the present invention detects a full charge state due to a rise in the temperature of the secondary battery and stops charging when charging the secondary battery contained in the battery pack. The battery pack includes a temperature detecting means for detecting contact with the surface of the battery pack and detecting a rise in temperature, and a control means for controlling the start and stop of charging based on an output signal of the temperature detecting means.
【０００７】更に具体的には前記温度検出手段は導電性
の接触板とこの接触板と熱伝導材を介し固定された温度
検出素子とを有し、前記制御手段は前記温度検出手段を
前記電池パックの表面に接触させた時に前記接触部から
出力される電気信号で充電を開始し前記温度検出素子か
ら出力される温度信号により充電を停止するスイッチを
備えている。More specifically, the temperature detecting means has a conductive contact plate and a temperature detecting element fixed to the contact plate via a heat conductive material, and the control means controls the temperature detecting means to the battery. A switch is provided which starts charging with an electric signal output from the contact portion when the pack comes into contact with the surface of the pack, and stops charging with a temperature signal output from the temperature detecting element.
【０００８】また、前記制御手段は前記温度検出手段の
電気信号と温度信号とにより充電中の状態表示を行うラ
ンプを備えてもよい。[0008] The control means may include a lamp for indicating a state of charging based on the electric signal and the temperature signal of the temperature detection means.
【０００９】また、前記温度検出素子は例えばサーミス
タを用いても良い。The temperature detecting element may use, for example, a thermistor.
【００１０】更に、前記温度検出手段は、温度検出レベ
ルと基準電圧とを比較し前記温度検出レベルが前記基準
電圧を越えた時に前記温度信号を出力すると共に前記基
準電圧を可変にするようにしても良い。Further, the temperature detecting means compares the temperature detection level with a reference voltage, and outputs the temperature signal when the temperature detection level exceeds the reference voltage and makes the reference voltage variable. Is also good.
【００１１】[0011]
【発明の実施の形態】次に本発明の実施の形態について
図面を参照して説明する。Embodiments of the present invention will now be described with reference to the drawings.
【００１２】図１は本発明の実施の形態例を示すブロッ
ク図である。図１において、電池パック２はニッケル・
カドミウム電池あるいはニッケル・水素電池を複数パッ
クした電池パックでその外部表面は負極に接続されてい
る。充電器１は交流電源を入力電源端子１４ａ，１４ｂ
に受け、電池パック２が接続される充電端子１５ａ，１
５ｂへ充電電流を出力する。FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, a battery pack 2 is made of nickel
The battery pack has a plurality of cadmium batteries or nickel-metal hydride batteries, and its outer surface is connected to the negative electrode. The charger 1 supplies AC power to input power terminals 14a and 14b.
Terminals 15a, 1 to which the battery pack 2 is connected
The charging current is output to 5b.
【００１３】充電器１は入力交流電源を直流定電流の充
電用電源に変換する定電流型ＡＣ／ＤＣ変換回路１３
と、電池パック２の外部表面に接触した時にその温度上
昇と接触による負電極とを検出する温度検出部１１と、
温度検出部１１の温度信号１０１ａ，１０１ｂと負電極
の電気信号１０１ｂとを入力し電池パック２への充電の
開始と停止とを自動的に制御する制御部１２とから構成
されている。The charger 1 is a constant current type AC / DC conversion circuit 13 for converting an input AC power supply into a DC constant current charging power supply.
A temperature detector 11 for detecting a temperature rise and a negative electrode due to the contact when the battery contacts the outer surface of the battery pack 2;
The control unit 12 receives the temperature signals 101a and 101b of the temperature detecting unit 11 and the electric signal 101b of the negative electrode and automatically controls the start and stop of charging of the battery pack 2.
【００１４】更に温度検出部１１は電気パック２の外部
表面と接触する導電性の接触板１１２と伝熱材を介し、
この接触板１１２に固定されたサーミスタ１１２とから
構成され、接触板１１２を電池パック２の外部表面に接
触させることにより負電極が電気信号１０１ｂとして出
力され、また制御部１２からサーミスタ１１２に供給さ
れる電流によりサーミスタの抵抗の変化で温度上昇が温
度信号１０１ａ，１０１ｂとして検出される。Further, the temperature detecting section 11 is provided with a conductive contact plate 112 which contacts the outer surface of the electric pack 2 and a heat transfer material.
A negative electrode is output as an electric signal 101b by contacting the contact plate 112 with the outer surface of the battery pack 2 and is supplied from the control unit 12 to the thermistor 112. The rise in temperature is detected as temperature signals 101a and 101b due to a change in the resistance of the thermistor due to the supplied current.
【００１５】また、制御部１２は温度検出部１１からの
温度信号１０１ａ，１０１ｂと電気信号１０１ｂとを受
け、充電を開始させる制御信号１０２と充電を停止させ
る制御信号１０３とを出力する温度検出回路１２２と、
制御信号１０２を受けた時にオン、制御信号１０３を受
けた時にオフするスイッチ１２１とで構成される。The control unit 12 receives the temperature signals 101a and 101b and the electric signal 101b from the temperature detection unit 11, and outputs a control signal 102 for starting charging and a control signal 103 for stopping charging. 122,
A switch 121 is turned on when receiving the control signal 102 and turned off when receiving the control signal 103.
【００１６】充電器１の構造は電池パックの充電時に電
池パック２を挿入する挿入口があり、電池パック２を挿
入することにより充電用端子１５ａ，１５ｂが電池パッ
ク２の正電極，負電極に接触して通電すると同時に充電
器１側の温度検出部１１の接触板１１２が電池パック２
の外部表面に接触する構造となっている。The structure of the battery charger 1 has an insertion opening for inserting the battery pack 2 when the battery pack is charged. When the battery pack 2 is inserted, the charging terminals 15a and 15b are connected to the positive and negative electrodes of the battery pack 2. The contact plate 112 of the temperature detector 11 on the side of the charger 1
It comes in contact with the outer surface of the
【００１７】次にこの充電器１の動作を説明する。Next, the operation of the charger 1 will be described.
【００１８】電池パック２を充電器１に挿入すると充電
器１の充電用端子１５ａ，１５ｂと電池パック１の正電
極，負電極とが接触すると同時に接触板１１２が電池パ
ック２の表面に接触する。接触板１１２は負電極を検出
してその電気信号１０１ｂが出力され温度検出回路１２
２を介し制御信号１０３がスイッチ１２１に入力され、
スイッチをオンして充電を開始する。充電電流は交流電
源をＤＣ変換し定電流出力とした定電流型ＤＣ／ＡＣ変
換回路１３から供給される。When the battery pack 2 is inserted into the battery charger 1, the charging terminals 15a and 15b of the battery charger 1 come into contact with the positive and negative electrodes of the battery pack 1, and at the same time the contact plate 112 comes into contact with the surface of the battery pack 2. . The contact plate 112 detects the negative electrode and outputs an electric signal 101b of the detected negative electrode.
2, the control signal 103 is input to the switch 121,
Turn on the switch to start charging. The charging current is supplied from a constant current type DC / AC conversion circuit 13 which converts an AC power supply into a DC and converts the AC power into a constant current output.
【００１９】電池パック２への充電が進行して満充電の
状態となると電池パック表面の温度が上昇する。この温
度上昇はサーミスタ１１１の抵抗値変化として検出され
た温度信号１０１ａ，１０１ｂとなり温度検出回路１２
２に入力される。ここでこの温度上昇が所定値となった
時に制御信号１０２が出力される。スイッチ１２１はこ
の制御信号１０２によりスイッチをオフとし充電を停止
する。When charging of the battery pack 2 progresses to a fully charged state, the temperature of the battery pack surface increases. This temperature rise results in temperature signals 101a and 101b detected as a change in the resistance value of the thermistor 111.
2 is input. Here, when the temperature rise reaches a predetermined value, a control signal 102 is output. The switch 121 is turned off by the control signal 102 to stop charging.
【００２０】尚、充電器１に電気信号１０１ｂあるいは
制御信号１０３でオン、温度信号１０１ａ，１０１ｂあ
るいは制御信号１０２でオフして充電中を表示する表示
ランプを設けても良い。The charger 1 may be provided with a display lamp which is turned on by the electric signal 101b or the control signal 103 and turned off by the temperature signal 101a, 101b or the control signal 102 to indicate that charging is being performed.
【００２１】また、温度検出回路１２２は温度信号１０
１ａ，１０１ｂの値を基準値と比較しており、温度信号
が基準値を越えた時に制御信号１０２を出力するが基準
値を可変してサーミスタなどの特性ばらつきを補正する
ようになっている。The temperature detection circuit 122 outputs the temperature signal 10
The values of 1a and 101b are compared with a reference value, and a control signal 102 is output when the temperature signal exceeds the reference value. However, the reference value is varied to correct the characteristic variation of the thermistor and the like.
【００２２】[0022]
【発明の効果】以上説明したように本発明の充電器は満
充電を検出するための電池パックの温度上昇を充電器側
に設けた温度検出部で行っているので、電池パックに温
度検出素子を設ける必要がなく電池パックを小形にで
き、かつ低価格にできるという効果がある。更に温度検
出部で同時に電池パックの挿入を検出して充電開始の制
御に利用しているので、制御回路が簡単になるという効
果がある。As described above, in the battery charger of the present invention, the temperature rise of the battery pack for detecting full charge is performed by the temperature detector provided on the charger side. There is no need to provide a battery pack, so that the battery pack can be made compact and inexpensive. Further, since the temperature detector detects the insertion of the battery pack at the same time and uses it for controlling the start of charging, the control circuit is simplified.
【図１】本発明の実施の形態例を示すブロック図であ
る。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】従来例を示すブロック図である。FIG. 2 is a block diagram showing a conventional example.
１ 充電器 ２ 電池パック １１ 温度検出部 １２ 制御部 １３ 定電流型ＡＣ／ＤＣ変換回路 １１１ サーミスタ １１２ 接触板 １２１ スイッチ １２２ 温度検出回路 DESCRIPTION OF SYMBOLS 1 Charger 2 Battery pack 11 Temperature detection part 12 Control part 13 Constant current type AC / DC conversion circuit 111 Thermistor 112 Contact plate 121 Switch 122 Temperature detection circuit
Claims (4)
する際に前記二次電池の温度上昇により満充電状態を検
出して充電を停止する充電器において、前記電池パック
の表面に接触して接触したことと温度上昇とを検出する
ために導電性の接触板とこの接触板と熱伝導材を介し固
定された温度検出素子とを有する温度検出手段と前記電
池パックを前記温度検出手段に接触させた時に前記接触
板から出力される電気信号で充電を開始し前記温度検出
素子から出力される温度信号により充電を停止するスイ
ッチ有する制御手段とを備えることを特徴とする充電
器。When charging a secondary battery housed in a battery pack, the battery charger detects a full charge state due to a rise in temperature of the secondary battery and stops charging. detecting a temperature rise that has been contacted Te
For this purpose, a conductive contact plate and the contact plate
Temperature detecting means having a fixed temperature detecting element;
When the pond pack comes into contact with the temperature detecting means,
Start charging with an electric signal output from the board and detect the temperature
Switch to stop charging by temperature signal output from element
And a control means having a switch.
信号と温度信号とにより充電中の状態表示を行うランプ
を備えることを特徴とする請求項１記載の充電器。 2. A battery charger according to claim 1, wherein said control means, characterized in that it comprises a lamp for performing status during charging by the electrical signal and the temperature signal of the temperature detecting means.
とを特徴とする請求項１あるいは２記載の充電器。 3. A battery charger according to claim 1 or 2, wherein said temperature detecting element is a thermistor.
基準電圧とを比較し前記温度検出レベルが前記基準電圧
を越えた時に前記温度信号を出力すると共に前記基準電
圧を可変にすることを特徴とする請求項１，２あるいは
３記載の充電器。 Wherein said temperature detecting means, characterized in that the reference voltage variable with the temperature detection level is compared with the temperature detection level and the reference voltage to output the temperature signal when it exceeds the reference voltage the claim 1, 2 Ah Rui to
3. The charger according to 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13400497A JP3190854B2 (en) | 1997-05-23 | 1997-05-23 | Charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13400497A JP3190854B2 (en) | 1997-05-23 | 1997-05-23 | Charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10327540A JPH10327540A (en) | 1998-12-08 |
| JP3190854B2 true JP3190854B2 (en) | 2001-07-23 |
Family
ID=15118137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13400497A Expired - Fee Related JP3190854B2 (en) | 1997-05-23 | 1997-05-23 | Charger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3190854B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1160895A1 (en) * | 1999-12-17 | 2001-12-05 | Mitsubishi Denki Kabushiki Kaisha | Flat battery pack and mobile communication terminal |
| KR101134733B1 (en) * | 2005-01-28 | 2012-04-13 | 엘지전자 주식회사 | Vehicle charging system |
| JP4536040B2 (en) * | 2006-07-25 | 2010-09-01 | 三洋電機株式会社 | Electrical equipment |
| WO2011135702A1 (en) * | 2010-04-28 | 2011-11-03 | トヨタ自動車株式会社 | Cell temperature measurement device, cell temperature measurement method, and cell production method |
| JP7259202B2 (en) * | 2018-03-08 | 2023-04-18 | ソニーグループ株式会社 | Battery packs and electronic devices |
-
1997
- 1997-05-23 JP JP13400497A patent/JP3190854B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10327540A (en) | 1998-12-08 |
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