JPH0587948B2 - - Google Patents
Info
- Publication number
- JPH0587948B2 JPH0587948B2 JP58128354A JP12835483A JPH0587948B2 JP H0587948 B2 JPH0587948 B2 JP H0587948B2 JP 58128354 A JP58128354 A JP 58128354A JP 12835483 A JP12835483 A JP 12835483A JP H0587948 B2 JPH0587948 B2 JP H0587948B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- charging
- battery
- time
- charging voltage
- 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 - Lifetime
Links
- 230000010365 information processing Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明はNi−cd電池等の充電可能な電池を充
電する方法に係り、該電池の満充電による充電停
止機構に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method of charging a rechargeable battery such as a Ni-CD battery, and relates to a charging stop mechanism when the battery is fully charged.
(ロ) 従来技術
従来の充電方式は例えば米国特許第4387332号
明細書及び図面に開示されている。即ち被充電電
池の充電電圧より所定電圧分だけ低い電圧を検出
してその電圧の最大値を常時記憶することのでき
る電位記憶素子（メモリオード）を利用し、前記
電池の充電電圧と電位記憶素子の記憶電圧とが一
致した時点で充電を停止していた。(b) Prior Art A conventional charging method is disclosed, for example, in the specification and drawings of US Pat. No. 4,387,332. That is, by using a potential storage element (memory ode) that can detect a voltage lower by a predetermined voltage than the charging voltage of the battery to be charged and constantly store the maximum value of that voltage, the charging voltage of the battery and the potential storage element are used. Charging was stopped when the stored voltage of
ところが第１図に示すように一般に被充電電池
の充電電圧は図中の曲線Ａの如く充電開始後約６
分間は負の勾配を持つて若干電圧が低下するが、
その後は充電が進行するにつれて徐々に充電電圧
は正の勾配を持つて上昇する。そして電池が満充
電になる前後で充電電圧は最大値をとり、以後緩
やかにその充電電圧は下降し始める。従来の方法
では図中破線Ｂで示す電位記憶素子の電圧と前記
曲線Ａの電池の充電電圧との交差点（P1）で充
電を停止していたため、大きな電流を利用して短
時間で充電するハイレート充電の場合、充電電圧
最大後の過充電を生じ、電池の劣化或いは損傷を
誘発することとなる。 However, as shown in Fig. 1, the charging voltage of the battery to be charged is generally approximately 6.5 m after the start of charging, as shown by curve A in the figure.
The voltage decreases slightly with a negative slope for a few minutes, but
Thereafter, as charging progresses, the charging voltage gradually increases with a positive slope. The charging voltage reaches its maximum value before and after the battery is fully charged, and thereafter begins to gradually decrease. In the conventional method, charging was stopped at the intersection (P 1 ) between the voltage of the potential storage element shown by the broken line B in the figure and the charging voltage of the battery shown by the curve A, so a large current is used to charge the battery in a short time. In the case of high-rate charging, overcharging occurs after the charging voltage has reached its maximum, leading to deterioration or damage to the battery.
(ハ) 発明の目的
本発明は上述の如き従来技術の問題点に鑑みて
成されたものであり、電池の充電をその充電電圧
の最大値付近で停止させ過充電を防止することを
目的とするものである。(c) Purpose of the Invention The present invention was made in view of the problems of the prior art as described above, and its purpose is to prevent overcharging by stopping charging of a battery near the maximum value of its charging voltage. It is something to do.
(ニ) 発明の構成
被充電電池の充電電圧を検出する中央情報処理
機能部に充電開始より一定時間経過後の充電電圧
より所定電圧だけ低い電圧を基準電圧として記憶
し、任意の時間間隔で前記電池の充電電圧を検出
すると共に一つ前の検出電圧とその次の検出電圧
との差電圧を順次前記基準電圧に加算してその都
度前記中央情報処理機能部に記憶させ、その記憶
された電圧が検出された充電電圧よりも大きくな
つた時点で前記電池の充電を停止し、即ち被充電
電池の充電電圧が最大値をとつた時点で充電を停
止して過充電を防ぐものである。(d) Structure of the invention A voltage lower by a predetermined voltage than the charging voltage after a certain period of time has elapsed from the start of charging is stored as a reference voltage in the central information processing function unit that detects the charging voltage of the battery to be charged. The charging voltage of the battery is detected, and the difference voltage between the previous detected voltage and the next detected voltage is sequentially added to the reference voltage and stored in the central information processing function unit each time, and the stored voltage is Charging of the battery is stopped when the voltage becomes larger than the detected charging voltage, that is, charging is stopped when the charging voltage of the battery to be charged reaches its maximum value, thereby preventing overcharging.
(ホ) 実施例
第２図に本願発明の一実施例のブロツク回路図
を示す。１は電源であり、商用交流電源（100V、
1A）を直流に変換したものが用いられる。２は
前記電源１にスイツチ３を介して接続可能とされ
たNi−cd電池である。４はアナログ・デジタル
変換器にして、前記スイツチ３と電池２の間に接
続されて該電池２のアナログ電圧をデジタル信号
に変換するものである。５は中央情報処理機能部
としてのワンチツプマイクロコンピユータであ
り、前記電池２の充電電圧に対応する前記変換器
４からの信号を入力し、基準電圧を算定する演算
回路部と、変換器４からの信号の変化分を前記基
準電圧に加えて常時新たな基準電圧を設定するメ
モリ部と、該基準電圧と前記充電電圧を比較する
比較回路部と、タイマとを具備している。６はス
タートスイツチであり、前記電池２をセツトし、
このスタートスイツチをオンさせると前記スイツ
チ３がオンし電源より充電電流が電池２に供給さ
れる。(E) Embodiment FIG. 2 shows a block circuit diagram of an embodiment of the present invention. 1 is the power supply, which is a commercial AC power supply (100V,
1A) converted to direct current is used. 2 is a Ni-CD battery that can be connected to the power source 1 via a switch 3. Reference numeral 4 denotes an analog-to-digital converter, which is connected between the switch 3 and the battery 2 and converts the analog voltage of the battery 2 into a digital signal. Reference numeral 5 denotes a one-chip microcomputer as a central information processing function unit, which includes an arithmetic circuit unit that inputs a signal from the converter 4 corresponding to the charging voltage of the battery 2 and calculates a reference voltage, and The battery includes a memory section that constantly sets a new reference voltage by adding a change in the signal of 2 to the reference voltage, a comparison circuit section that compares the reference voltage and the charging voltage, and a timer. 6 is a start switch, which sets the battery 2;
When this start switch is turned on, the switch 3 is turned on and charging current is supplied to the battery 2 from the power source.
次に第３図のフローチヤートに従つて本願発明
の動作を説明する。 Next, the operation of the present invention will be explained according to the flowchart shown in FIG.
スタートスイツチ３をオンすると前述のように
電池２の充電が開始される。この時マイクロコン
ピユータ５内のタイマが始動する。６分経過後電
池２の充電電圧Vtが前記コンピユータ５内に変
換器４を介して入力され、メモリ部にその電圧
Vtから所定電圧α（実施例では0.1V）だけ差し引
いた電圧V0＝Vt−αを記憶させる。電池２の充
電電圧は前記タイマを利用して時間ts毎にコンピ
ユータ５内に入力される。そして前回検出時の充
電電圧Ｖ（ｔ−１）と今回検出時の充電電圧Ｖ
（ｔ）との差電圧β＝Ｖ（ｔ）−Ｖ（ｔ−１）を算出
し、これを前記基準電圧V0に加算しV0＋βを新
たなる基準電圧V0としてメモリ部に貯える。以
後時間ts毎にこの操作をくり返す。 When the start switch 3 is turned on, charging of the battery 2 is started as described above. At this time, a timer within the microcomputer 5 is started. After 6 minutes have elapsed, the charging voltage Vt of the battery 2 is input into the computer 5 via the converter 4, and the voltage is stored in the memory section.
A voltage V0=Vt−α obtained by subtracting a predetermined voltage α (0.1V in the embodiment) from Vt is stored. The charging voltage of the battery 2 is input into the computer 5 at every time ts using the timer. Then, the charging voltage V (t-1) at the previous detection and the charging voltage V at the current detection
(t), the difference voltage β=V(t)−V(t−1) is calculated, this is added to the reference voltage V0, and V0+β is stored in the memory section as a new reference voltage V0. Thereafter, this operation is repeated every time ts.
ところで電池２の充電電圧は第１図の曲線Ａで
示された如きものであり、第４図に示す通りβは
点P2迄は徐々に増加するが、この点P2を境に次
第に減少し始める。そこで、現時点での差電圧βt
とその一つ前の差電圧βt−１を比較し、βt≧βt−
１のときはβtを前記βとして前回の充電電圧検出
時の基準電圧V0に加算し、βt＜βt−１のときは
種々の差電圧βtの中で最も大きい値、即ち点P2で
の差電圧βmaxをβとして時々刻々と変化する基
準電圧V0に加算してやると、第１図の曲線Ｃの
如く、充電電圧と点P3で交わる基準電圧曲線が
得られる。そして任意の時間における充電電圧Ｖ
（ｔ）と基準電圧V0とを時間ts毎に比較し、V0＞
Ｖ（ｔ）となつたとき（第４図の点P4）にコンピ
ユータ５より停止信号を出力して前記スイツチ３
をオフせしめ電池２の充電を停止させる。 By the way, the charging voltage of battery 2 is as shown by curve A in Figure 1, and as shown in Figure 4, β gradually increases up to point P2 , but gradually decreases after this point P2 . Begin to. Therefore, the current differential voltage βt
and the previous difference voltage βt−1, and βt≧βt−
1, βt is added as β to the reference voltage V0 at the time of previous charging voltage detection, and when βt<βt−1, the largest value among the various differential voltages βt, that is, the difference at point P2 By adding the voltage βmax as β to the constantly changing reference voltage V0, a reference voltage curve that intersects the charging voltage at point P3 , as shown by curve C in FIG. 1, is obtained. and the charging voltage V at any time
(t) and the reference voltage V0 are compared at each time ts, and V0>
V(t) (point P 4 in FIG. 4), the computer 5 outputs a stop signal and the switch 3
is turned off to stop charging the battery 2.
(ヘ) 発明の効果
本発明は以上の説明の如く、被充電電池の充電
電圧を検出する中央情報処理機能部に充電開始よ
り一定時間経過後の充電電圧より所定電圧だけ低
い電圧を基準電圧として記憶し、任意の時間間隔
で前記電池の充電電圧を検出すると共に一つ前の
検出電圧とその次の検出電圧との差電圧を求め、
その差電圧の最大値を順次前記基準電圧に加算し
てその都度前記中央情報処理機能部に記憶させ、
その記憶された電圧が検出された充電電圧よりも
大きくなつた時点で前記電池の充電を停止するも
のであるから、電池の充電電圧が最大値付近に達
したときに充電を停止させることができるため過
充電の防止ができ、従来の如くハイレート充電の
場合に電池が劣化したり損傷を受けたりすること
もなくなる。更に最初の基準電圧と充電電圧との
差を変えることによつて、充電電圧の最大値の前
後で充電を停止することも可能であり、普通充
電、ハイレート充電、トリクル充電等に応じて最
適の充電終了時点を得ることができる。(f) Effects of the Invention As described above, the present invention provides a central information processing function unit that detects the charging voltage of a battery to be charged, using a voltage lower by a predetermined voltage as a reference voltage than the charging voltage after a certain period of time has elapsed from the start of charging. memorize it, detect the charging voltage of the battery at arbitrary time intervals, and find the difference voltage between the previous detected voltage and the next detected voltage,
Sequentially adding the maximum value of the differential voltage to the reference voltage and storing it in the central information processing function unit each time,
Since charging of the battery is stopped when the stored voltage becomes higher than the detected charging voltage, charging can be stopped when the charging voltage of the battery reaches around the maximum value. Therefore, overcharging can be prevented, and the battery will not deteriorate or be damaged during high rate charging as in the conventional case. Furthermore, by changing the difference between the initial reference voltage and the charging voltage, it is possible to stop charging before or after the maximum charging voltage. You can get the charging end point.
第１図は本発明一実施例における電池の充電電
圧及び基準電圧特性図、第２図はブロツク回路
図、第３図は動作を示すフローチヤート、第４図
は第１図の部分拡大特性図である。
５……中央情報処理機能部。
Fig. 1 is a charging voltage and reference voltage characteristic diagram of a battery in an embodiment of the present invention, Fig. 2 is a block circuit diagram, Fig. 3 is a flowchart showing the operation, and Fig. 4 is a partial enlarged characteristic diagram of Fig. 1. It is. 5...Central information processing function department.
Claims (1)
理機能部に充電開始より一定時間経過後の充電電
圧より所定電圧だけ低い電圧を基準電圧として記
憶し、任意の時間間隔で前記電池の充電電圧を検
出すると共に一つ前の検出電圧とその次の検出電
圧との差電圧を求め、この差電圧の最大値を順次
前記基準電圧に加算してその都度前記中央情報処
理機能部に記憶させ、その記憶された電圧が検出
された充電電圧よりも大きくなつた時点で前記電
池の充電を停止する電池の充電方法。1. A central information processing function unit that detects the charging voltage of the battery to be charged stores a voltage lower by a predetermined voltage than the charging voltage after a certain period of time has elapsed from the start of charging as a reference voltage, and changes the charging voltage of the battery at arbitrary time intervals. At the same time as detecting, the difference voltage between the previous detected voltage and the next detected voltage is determined, and the maximum value of this difference voltage is sequentially added to the reference voltage and stored in the central information processing function unit each time. A method of charging a battery, wherein charging of the battery is stopped when a stored voltage becomes larger than a detected charging voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58128354A JPS6020478A (en) | 1983-07-13 | 1983-07-13 | Charging method of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58128354A JPS6020478A (en) | 1983-07-13 | 1983-07-13 | Charging method of battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6020478A JPS6020478A (en) | 1985-02-01 |
| JPH0587948B2 true JPH0587948B2 (en) | 1993-12-20 |
Family
ID=14982741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58128354A Granted JPS6020478A (en) | 1983-07-13 | 1983-07-13 | Charging method of battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6020478A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5551644B2 (en) * | 1974-09-04 | 1980-12-25 | ||
| JPS56107550A (en) * | 1980-01-30 | 1981-08-26 | Fujitsu Ltd | Molecular beam crystal growing process |
| JPS5844776A (en) * | 1981-09-11 | 1983-03-15 | Konishiroku Photo Ind Co Ltd | Manufacturing device for amorphous silicon solar cell |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6013252Y2 (en) * | 1978-09-29 | 1985-04-26 | ソニー株式会社 | charging device |
-
1983
- 1983-07-13 JP JP58128354A patent/JPS6020478A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5551644B2 (en) * | 1974-09-04 | 1980-12-25 | ||
| JPS56107550A (en) * | 1980-01-30 | 1981-08-26 | Fujitsu Ltd | Molecular beam crystal growing process |
| JPS5844776A (en) * | 1981-09-11 | 1983-03-15 | Konishiroku Photo Ind Co Ltd | Manufacturing device for amorphous silicon solar cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6020478A (en) | 1985-02-01 |
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