JPH01308132A - Battery charger - Google Patents
Battery chargerInfo
- Publication number
- JPH01308132A JPH01308132A JP63135217A JP13521788A JPH01308132A JP H01308132 A JPH01308132 A JP H01308132A JP 63135217 A JP63135217 A JP 63135217A JP 13521788 A JP13521788 A JP 13521788A JP H01308132 A JPH01308132 A JP H01308132A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- charging
- battery
- initial value
- output
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 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)
Abstract
Description
【発明の詳細な説明】
皮栗上辺上月列立
本発明はニッケルカドミウム等の蓄電池の充電装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a charging device for a storage battery such as nickel cadmium or the like.
長球４日え開
蓄電池は充電末期になると温度が高くなる。従フて、従
来、この温度変化を検出して蓄電池の充電終了を制御す
る装置が提案されている。その１つは電池温度を検出す
るのにサーモスタソｌ□を用いた手段（実開昭５１１３
４２３１号公報）であり、他は正特性サーミスタを用い
た手段（実開昭５１−１３０４１６号公報）である。い
ずれの手段とも充電を終了する電池温度を予め定めてお
き、実際の電池温度が予め定めた温度まで上昇したのを
サーモスタットの開閉、若しくは正特性サーミスタの抵
抗値の急変によって検出し、充電電流を制御する。The temperature of a long ball 4-day storage battery becomes high at the end of charging. Therefore, conventionally, a device has been proposed that detects this temperature change and controls the end of charging of a storage battery. One method is to use a thermostat to detect battery temperature (Utility Model No. 5113
4231 (Japanese Utility Model Publication), and the other is a means using a positive temperature coefficient thermistor (Japanese Utility Model Application No. 51-130416). In either method, the battery temperature at which charging ends is determined in advance, and when the actual battery temperature rises to the predetermined temperature, it is detected by opening/closing a thermostat or by a sudden change in the resistance value of a positive temperature coefficient thermistor, and the charging current is then adjusted. Control.
発漕勿」ｐ皺しよｉζｔゑ擢洒
ところで、蓄電池の充電を開始してから充電満了するま
でには所定の充電量が必要であり、この充電量は充電開
始時の電池温度からの温度上昇分と相関関係がある。従
って、充電開始時の電池温度が常に同じ温度であれば、
電池温度が予め定めた温度に上昇するまで充電を行うこ
とにより適切な充電を確保できるが、実際には充電υｎ
始時の電池温度が周囲温度によって高低種々存在するた
め、従来手段では過充電や充電不足等を来すことがある
。即ち、従来手段では充電開始時の電池温度が低いと第
５図に実線で示すように予め定めた電池温度に上昇する
までの充電時間が長くなって過充電を起こし、逆に充電
開始時の電池温度が高いと第５図に破線で示すように充
電時間が短く、充電不足を起こす。By the way, a certain amount of charge is required from the start of charging the storage battery until the end of charging, and this amount of charge is determined by the temperature of the battery from the temperature at the start of charging. There is a correlation with the increase. Therefore, if the battery temperature at the start of charging is always the same,
Adequate charging can be ensured by charging until the battery temperature rises to a predetermined temperature, but in reality charging υn
Since the initial battery temperature varies depending on the ambient temperature, conventional means may cause overcharging or undercharging. In other words, in the conventional means, if the battery temperature at the start of charging is low, the charging time until the battery temperature rises to a predetermined temperature becomes longer as shown by the solid line in Figure 5, causing overcharging, and conversely, the battery temperature at the start of charging becomes low. If the battery temperature is high, the charging time will be short as shown by the broken line in FIG. 5, resulting in insufficient charging.
本発明はこのような課題に鑑み、充電開始当初の電池温
度によって過充電や充電不足を生じることなく、常に適
切量の充電を保障できる簡単で有用な充電装置を提供す
ることを目的とする。In view of these problems, it is an object of the present invention to provide a simple and useful charging device that can always ensure an appropriate amount of charging without causing overcharging or undercharging depending on the battery temperature at the beginning of charging.
１υｌを」眉火ｊ７１眞何巳段
上記目的を達成するため本発明に係る蓄電池の充電装置
は被充電電池を充電する充電回路と、温度変化に対して
検出出力が線形比例する特性をもち、電池温度を検出す
る温度検出素子と、充電開始時に温度検出素子によって
検出される電池温度を初期値として記１．ａする初期値
記憶手段と、充電中の各瞬時にｎ；ｊ記検出素子によっ
て検出される温度出力から初期値を減算すると共に、そ
の減算値を設定値と比較し、減算値が設定値上廻ったと
き被充電電池の充電を停止するよう制御する充電制御手
段とを備えてなることを特徴とする。In order to achieve the above object, the storage battery charging device according to the present invention has a charging circuit for charging the battery to be charged, and a characteristic that the detection output is linearly proportional to temperature change, The temperature detection element that detects the battery temperature and the battery temperature detected by the temperature detection element at the start of charging are set as initial values in 1. an initial value storage means for subtracting the initial value from the temperature output detected by the n; It is characterized by comprising a charging control means for controlling the charging of the battery to be charged to be stopped when the battery is turned.
イ丁」
本発明によれは、充電開始時に温度検出素子によって検
出される電池温度を初期値として、充電途中の温度検出
素子の出力から初期値を減算し、その減算値が設定値を
超えたかどうか判別する。According to the present invention, the battery temperature detected by the temperature detection element at the start of charging is used as an initial value, and the initial value is subtracted from the output of the temperature detection element during charging, and whether the subtracted value exceeds the set value or not. Please judge.
この場合、温度検出素子は電池温度に線形比例した出力
を発するので、充電開始時の電池温度が何度であっても
前記減算値は充電開始時からの電池温度の上昇分に一致
する。In this case, since the temperature detection element emits an output linearly proportional to the battery temperature, the subtracted value corresponds to the increase in battery temperature from the start of charging, regardless of the temperature of the battery at the start of charging.
従って、本発明によれば設定値を適切な充電量に相当す
る値に定めることにより、周囲温度が低くても或いは高
くても常に過充電や充電不足を起こすことなく適切な充
電量に充電できる。Therefore, according to the present invention, by setting the set value to a value corresponding to an appropriate charge amount, it is possible to charge the battery to an appropriate charge amount without overcharging or undercharging at all times, even when the ambient temperature is low or high. .
実−差」−
以下、本発明の充電装置を図面の一実施例に従って説明
する。第１図は、充電回路のブロック図を示す。この図
において１は充電電源、２は該充電電源１に接続され、
充電電流を供給される被充電電池、３は例えば被充電電
池の外表面に設けられて、電池温度を検出する温度検出
素子、４は充電電源１と被充電電池２及び温度検出素子
３との間に介挿される充電スイッチ、５は前記温度検出
素子３の出力電圧を検出するＡ／Ｄコンバータ、６は前
記Ａ／Ｄコンバータ５から検出信号を入力され、前記充
電スイッチ４の開閉制御を行う１チツプマイクロコンピ
ユータ、７は該マイクロコンピュータ６を作動させるス
タートスイッチ回路である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a charging device of the present invention will be described according to an embodiment of the drawings. FIG. 1 shows a block diagram of the charging circuit. In this figure, 1 is a charging power source, 2 is connected to the charging power source 1,
A battery to be charged is supplied with a charging current, 3 is a temperature detection element provided on the outer surface of the battery to be charged, for example, and detects the battery temperature, 4 is a temperature detection element between the charging power source 1, the battery to be charged 2, and the temperature detection element 3. A charging switch inserted between the charging switch 5 and the A/D converter 5 detecting the output voltage of the temperature detection element 3; and 6 receiving a detection signal from the A/D converter 5 and controlling the opening/closing of the charging switch 4; A one-chip microcomputer, 7 is a start switch circuit for operating the microcomputer 6.
前記の温度検出素子３は、第３図に示すように電池温度
Ｔに対し検出出力■０が線形比例する特性をもつ温度セ
ンサが用いられる。このような温度センサとしては例え
ばＬＭ３４（ナショナル製）等がある。As the temperature detection element 3 described above, a temperature sensor is used which has a characteristic that the detection output (2) is linearly proportional to the battery temperature T, as shown in FIG. An example of such a temperature sensor is LM34 (manufactured by National).
第２図は第１図の充電装置の制御動作を説明するフロー
チャートであり、スタートスイッチ回路■によって充電
スタート信号がマイクロコンピュータ６に入力されると
、プログラムがスタートし、ステップＳ１に進む。この
ステップでは充電スイッチ４を閉成し、被充電電池２に
充電電流を供給し始めると共に、マイクロコンピュータ
内のバッファメモリのフラグを°゛Ｏ”にセントする。FIG. 2 is a flowchart illustrating the control operation of the charging device shown in FIG. 1. When a charging start signal is input to the microcomputer 6 by the start switch circuit (2), the program starts and the process proceeds to step S1. In this step, the charging switch 4 is closed and charging current starts to be supplied to the battery 2 to be charged, and the flag of the buffer memory in the microcomputer is set to °O.
次いで、ステップＳ２に進み、温度検出素子３の検出用
ノＪＶｏをＡ／Ｄコンバータ５を介してマイクロコンピ
ュータ６内に読み込む。Next, the process proceeds to step S2, and the detection value JVo of the temperature detection element 3 is read into the microcomputer 6 via the A/D converter 5.
ステップＳ３においては、フラグが１”であるかどうか
判定する。プログラムがスタートした直後にはステップ
Ｓ１出フラグが“０”にセットされているので、ステッ
プＳ４に進み、Ｓ２で読み込んだ検出出力ＶＯを初期値
ＶＯ′として記憶する。続いてステップＳ５に進みフラ
グを“１”に七ソトシてステップＳ２に戻る。Ｓ２で再
びその瞬時の検出出力ＶＯを読み込み、ステップＳ３１
に進む。２回目以降の歩進の際にはフラグがｕ１°′に
なっているので、プログラムはステップＳ３からＳ６へ
と進み、Ｓ２出読み込んだ検出出力ＶＯから、初期値Ｖ
ｏ’を滅じ、その減算値が設定値ｖｔ−ｔ−越えるかと
うか判定する。ＮＯの場合には再びステップＳ２に戻り
、３２−３３→５６−３２・・・のループを繰り返し歩
進する。そして、やがて減算値Ｖｏ−Ｖｏ’が設定値を
越えると、ステップＳ７に進み、充電スイッチ４をオフ
し、充電を終了する。尚、設定値Ｖｔは、第３図に示す
ように蓄電池を充電開始してから適正量充電し終えるま
での間の電池温度上昇分ｔに相当する電圧値である。In step S3, it is determined whether the flag is "1". Immediately after the program starts, the step S1 output flag is set to "0", so the process proceeds to step S4, and the detection output VO read in S2 is set to "0". is stored as the initial value VO'.Next, the process proceeds to step S5, sets the flag to "1", and returns to step S2.In S2, the instantaneous detection output VO is read again, and step S31
Proceed to. During the second and subsequent steps, the flag is set to u1°', so the program proceeds from step S3 to S6, and from the detection output VO read from S2, the initial value V
o' is deleted, and it is determined whether the subtracted value exceeds the set value vt-t-. In the case of NO, the process returns to step S2 again, and the loop of 32-33→56-32... is repeated. Then, when the subtraction value Vo-Vo' exceeds the set value, the process proceeds to step S7, where the charging switch 4 is turned off and charging is ended. Incidentally, the set value Vt is a voltage value corresponding to the battery temperature increase t from the start of charging the storage battery until the proper amount of charging is completed, as shown in FIG.
以上のようにして蓄電池の充電を行えば、電池開始時の
電池温度が第４図に実線で示ずようにｉ”、°Ｃと低く
ても、或いは破線で示すようにＴ２°Ｃと高くても、充
電はいずれも充電開始温度からｔ℃」二昇した温度で終
了する。つまり、充電開始時の電池温度に依存すること
なく常に適正量の充電か実現する。If the storage battery is charged as described above, even if the battery temperature at the start of the battery is as low as i'', °C, as shown by the solid line in Figure 4, or as high as T2°C, as shown by the broken line. In all cases, charging ends at a temperature t° C. higher than the charging start temperature. In other words, the appropriate amount of charge is always achieved regardless of the battery temperature at the start of charging.
発−明一〇−効、１
以上説明したように本発明によれば、充電開始時点から
電池温度か設定温変分上昇する時点まで充電が行われる
ため、充電開始時の電池温度の如何にかかわらず、適正
な充電が可能となる。Invention 10-Effects, 1 As explained above, according to the present invention, since charging is performed from the time when charging is started until the time when the battery temperature rises by the set temperature variation, it is possible to Regardless of the situation, proper charging is possible.
加えて、本発明では温度検出素子として電池温度に対し
線形比例する出力を発する特性をもったものを用いてい
るので、設定値を温度依存性の内置定値とすることがで
きる。即ち、もし、温度検出素子がサーミスタ等の非線
形素子であると、設定値は、充電開始時の電池温度によ
って大小変更調整しなければならず、それだけ回路構成
上或いはソフトウェアが複雑になるが、本発明では温度
検出素子が線形素子なので、そのような複雑さがない。In addition, in the present invention, since a temperature detection element having a characteristic of emitting an output linearly proportional to the battery temperature is used, the set value can be a temperature-dependent internal fixed value. In other words, if the temperature detection element is a nonlinear element such as a thermistor, the set value must be adjusted in size depending on the battery temperature at the start of charging, which will complicate the circuit configuration or software, but this is not a problem. In the invention, the temperature sensing element is a linear element, so there is no such complexity.
第１図は本発明の充電装置の一実施例を示すブロック図
、第２図は第１図のマイクロコンピュータの動作を示す
フローチャー１・、第３図は温度検出素子の温度出力電
圧の特性図、第４図は本発明による充電特性図、第５図
は充電開始時の電池温度が高い場合と低い場合の従来の
方法による充電特性図である。
１・・・充電電池源、２・・・被充電電池、３・・・温
度検出素子、６・・・マイクロコンピュータ。
特許出願人 ： 三洋電機 株式会社
代理人 ： 弁理士 中高 司朗
第１図
報ぐ鰹昏帳都０鋒１昭
硬帆 ジの糺咬Fig. 1 is a block diagram showing an embodiment of the charging device of the present invention, Fig. 2 is a flowchart 1 showing the operation of the microcomputer shown in Fig. 1, and Fig. 3 is the characteristic of the temperature output voltage of the temperature detection element. 4 is a charging characteristic diagram according to the present invention, and FIG. 5 is a charging characteristic diagram according to a conventional method when the battery temperature at the start of charging is high and low. DESCRIPTION OF SYMBOLS 1... Rechargeable battery source, 2... Charged battery, 3... Temperature detection element, 6... Microcomputer. Patent applicant: Sanyo Electric Co., Ltd. Agent: Patent attorney Shiro Nakataka
Claims (1)
電池温度を検出する温度検出素子と、充電開始時に温度
検出素子によって検出される電池温度を初期値として記
憶する初期値記憶手段と、 充電中の各瞬時に前記検出素子によって検出される温度
出力から初期値を減算すると共に、その減算値を設定値
と比較し、減算値が設定値上廻ったとき被充電電池の充
電を停止するよう制御する充電制御手段と、 を備えてなる蓄電池の充電装置。(1) A charging circuit that charges the battery to be charged, and a characteristic that the detection output is linearly proportional to temperature changes,
a temperature detection element for detecting battery temperature; an initial value storage means for storing the battery temperature detected by the temperature detection element at the start of charging as an initial value; and temperature output detected by the detection element at each instant during charging. A storage battery charging device comprising: a charging control means for subtracting an initial value, comparing the subtracted value with a set value, and stopping charging of the battery to be charged when the subtracted value exceeds the set value. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63135217A JPH01308132A (en) | 1988-05-31 | 1988-05-31 | Battery charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63135217A JPH01308132A (en) | 1988-05-31 | 1988-05-31 | Battery charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01308132A true JPH01308132A (en) | 1989-12-12 |
Family
ID=15146569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63135217A Pending JPH01308132A (en) | 1988-05-31 | 1988-05-31 | Battery charger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01308132A (en) |
-
1988
- 1988-05-31 JP JP63135217A patent/JPH01308132A/en active Pending
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