JPH08138746A - Refreshing method for secondary battery and its device - Google Patents

Refreshing method for secondary battery and its device

Info

Publication number
JPH08138746A
JPH08138746A JP6279256A JP27925694A JPH08138746A JP H08138746 A JPH08138746 A JP H08138746A JP 6279256 A JP6279256 A JP 6279256A JP 27925694 A JP27925694 A JP 27925694A JP H08138746 A JPH08138746 A JP H08138746A
Authority
JP
Japan
Prior art keywords
secondary battery
discharge
value
refresh operation
memory effect
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.)
Withdrawn
Application number
JP6279256A
Other languages
Japanese (ja)
Inventor
Hideki Nakanishi
英城 中西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP6279256A priority Critical patent/JPH08138746A/en
Publication of JPH08138746A publication Critical patent/JPH08138746A/en
Withdrawn legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

PURPOSE: To shorten the working hour of a refresh operation for preventing memory effect by discharging a secondary battery to a some degree of level with a comparatively large current value at first, and thereafter reducing the discharge current value gradually. CONSTITUTION: The electrical capacity of a secondary battery 1 is detected by detecting a terminal voltage Vbatt using a voltage detection means 2. This detected value is compared with a predetermined value by a comparison means 3. Discharge is conducted with comparatively large discharge current using a discharge resistor array 4 by controlling a connection means 5 via an MPU 6 until Vbatt <Vth (the Vth is a threshold value) is attained. Thereafter, the discharge current is reduced by reducing the discharge resistor gradually. When Vbatt <Vend (discharge completion target value) is attained, the discharge is ceased so that a refresh operation for preventing a memory effect is completed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、2次電池のメモリ効果
を防止するための、2次電池のリフレッシュ手段に関す
るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary battery refreshing means for preventing a memory effect of a secondary battery.

【0002】[0002]

【従来の技術】従来の例えばプリンタなどの記録装置に
用いられている2次電池は、その電気容量を使い切って
しまうと、排紙動作や印字ヘッド復帰動作などができな
くなるため、ある程度の容量が残存しているうちに放電
を停止させる場合が多い。しかしながら、このような使
用法は、例えばNi−Cd2次電池やNi−MH2次電
池等においては、メモリ効果を誘発させるものである。
2. Description of the Related Art A conventional secondary battery used in a recording device such as a printer has a certain capacity because it cannot perform a paper discharge operation or a print head restoration operation when its electric capacity is used up. In many cases, the discharge is stopped while remaining. However, such usage induces a memory effect in, for example, a Ni-Cd secondary battery or a Ni-MH secondary battery.

【0003】通常、このメモリ効果を回避するために、
2次電池のリフレッシュ動作が行われる。従来の2次電
池のリフレッシュ手段の一構成例を図4に示す。以下の
シーケンスは、上記構成の動作を表わすものである。
Usually, in order to avoid this memory effect,
The refresh operation of the secondary battery is performed. FIG. 4 shows an example of the configuration of a conventional refreshing means for a secondary battery. The following sequence represents the operation of the above configuration.

【0004】(1)対象とする2次電池1をリフレッシ
ュ手段に接続する,(2)スイッチ7をオンする,
(3)2次電池1を、放電抵抗8(定抵抗)に接続す
る。通常、このときの放電電流値は0.2〜0.3Cで
ある,(4)2次電池1の端子電圧値Vbattを、電圧検
出手段2が定期的に検出する,(5)端子電圧値Vbatt
が閾値Vthより小さくなった時点で、スイッチ7をオフ
する。
(1) Connect the target secondary battery 1 to the refresh means, (2) turn on the switch 7,
(3) The secondary battery 1 is connected to the discharge resistance 8 (constant resistance). Usually, the discharge current value at this time is 0.2 to 0.3 C, (4) the terminal voltage value V batt of the secondary battery 1 is periodically detected by the voltage detecting means 2, (5) terminal voltage Value V batt
When the value becomes smaller than the threshold value V th , the switch 7 is turned off.

【0005】なお、3は、前記端子電圧Vbattの検出値
と閾値Vthとの大小を比較するための比較手段、6は、
これらのシステムを統括するためのMPUである。
Reference numeral 3 is a comparison means for comparing the detected value of the terminal voltage V batt with the threshold value V th, and 6 is a comparison means.
It is an MPU for controlling these systems.

【0006】以上のようなシーケンスにより、充電動作
に移行する前に2次電池の残容量を完全に放電させれ
ば、前記のようなメモリ効果を防止することが可能であ
る。
According to the above sequence, if the remaining capacity of the secondary battery is completely discharged before shifting to the charging operation, it is possible to prevent the above memory effect.

【0007】また、上記リフレッシュ動作の特徴の1つ
に、非常に時間がかかるということがある。最近では、
この所要時間を短縮させようという提案が下記に示すよ
うにいくつか開示されている。
Further, one of the characteristics of the refresh operation is that it takes a very long time. recently,
Several proposals for reducing this time are disclosed as shown below.

【0008】(1)特開平4−261338号公報の場
合 前記従来構成の場合、2次電池の残容量が少なくなり、
起電力が低下してくると、放電電流値も一緒に小さくな
ってしまい、リフレッシュ動作が長時間化する要因にな
る。そこで、この公報では、2次電池の起電力に関係な
く、常に一定の電流値でリフレッシュ動作が行われるよ
うな構成を提案している。
(1) In the case of Japanese Unexamined Patent Publication No. 4-261338 In the case of the above-mentioned conventional structure, the remaining capacity of the secondary battery is reduced,
When the electromotive force decreases, the discharge current value also decreases, which causes the refresh operation to take a long time. Therefore, this publication proposes a configuration in which the refresh operation is always performed with a constant current value regardless of the electromotive force of the secondary battery.

【0009】(2)特開平4−168929号公報の場
合 前記従来構成の場合、2次電池の残容量が、メモリ効果
が起こらないくらいに非常に少ないときにも、リフレッ
シュ動作が行われ、結果的に無駄な動作時間になってし
まう。そこで、この公報では、ユーザのキー操作によ
り、リフレッシュを行わずに充電動作に移行する構成を
提案している。
(2) Japanese Patent Laid-Open No. 4-168929 In the case of the above-mentioned conventional configuration, the refresh operation is performed even when the remaining capacity of the secondary battery is so small that the memory effect does not occur. Operation time is wasted. Therefore, this publication proposes a configuration in which a charging operation is performed without refreshing by a user's key operation.

【0010】[0010]

【発明が解決しようとする課題】しかしながら、上記各
提案例にはそれぞれ下記のような不具合点があった。す
なわち、 (1)特開平4−261338号公報の場合の不具合点 リフレッシュ動作の効果がある電流値は0.2〜0.3
Cであり、これより大きな電流で放電を行っても、2次
電池は完全放電されない。よって、この特許構成で設定
可能なリフレッシュ電流(定電流)の上限は0.3Cで
あり、この場合、2次電池の完全放電状態までは最大4
時間程度が必要となる。このため、この提案は、ある程
度の作業の時間の短縮化は望めるが、大きな短縮は望め
ない。
However, each of the above proposed examples has the following drawbacks. That is, (1) Problems in the case of Japanese Patent Application Laid-Open No. 4-261338. The current value at which the refresh operation is effective is 0.2 to 0.3.
It is C, and the secondary battery is not completely discharged even if discharging is performed with a larger current. Therefore, the upper limit of the refresh current (constant current) that can be set in this patented structure is 0.3C, and in this case, the maximum is 4 until the secondary battery is completely discharged.
It takes time. For this reason, this proposal can be expected to shorten the work time to some extent, but not a great reduction.

【0011】(2)特開平4−168929号公報の場
合の不具合点 この提案は、ユーザに2次電池リフレッシュの要・不要
を判断させることを特徴としている。つまり、ユーザの
判断が間違えば、2次電池はリフレッシュされず、メモ
リ効果を起こす場合もある。すなわち、2次電池の使用
状況のみから、その残容量を推測する(リフレッシュの
要・不要を判断する)ことは極めて困難である。
(2) Inconvenience in the case of Japanese Patent Laid-Open No. 168929/1992 This proposal is characterized by allowing the user to determine whether or not the secondary battery should be refreshed. That is, if the user makes a mistake, the secondary battery may not be refreshed and a memory effect may occur. That is, it is extremely difficult to estimate the remaining capacity (determine whether refresh is necessary or not) only from the usage status of the secondary battery.

【0012】本発明は、以上のような局面にかんがみて
なされたもので、上記のような従来提案例の諸問題点を
解決して、その作業時間を短縮し得る2次電池のリフレ
ッシュ方法及び装置の提供を目的としている。
The present invention has been made in view of the above situation, and solves various problems of the above-mentioned conventional proposals and shortens the working time thereof. The purpose is to provide the device.

【0013】[0013]

【課題を解決するための手段】このため、本発明におい
ては、 (1)2次電池のメモリ効果を防止するためのリフレッ
シュ装置において、この2次電池の電気容量を検出する
手段と、この2次電池の放電を行うための複数の負荷素
子と、この負荷素子を選択して前記2次電池を接続する
ための接続手段とを有し、複数の負荷を前記2次電池に
接続して、大きな電流値でリフレッシュ動作を開始し、
ある程度この2次電池の電気容量が減少した後、この2
次電池に接続する負荷を順次減らしていき、所定の電流
値で所定の放電終止の電気容量値まで2次電池を放電さ
せることにより、リフレッシュ動作を完了させることを
特徴とする2次電池のリフレッシュ装置により、前記目
的を達成しようとするものである。
Therefore, in the present invention, (1) in a refreshing device for preventing the memory effect of a secondary battery, a means for detecting the electric capacity of the secondary battery, and A plurality of load elements for discharging the secondary battery and connection means for selecting the load element and connecting the secondary battery, and connecting a plurality of loads to the secondary battery, Start the refresh operation with a large current value,
After the electric capacity of this secondary battery has decreased to some extent,
Refreshing the secondary battery characterized in that the refresh operation is completed by gradually reducing the load connected to the secondary battery and discharging the secondary battery to a predetermined discharge end electric capacity value with a predetermined current value. The device aims to achieve the above-mentioned object.

【0014】(2)また、さらに、前記2次電池のメモ
リ効果を防止するためのリフレッシュ装置において、リ
フレッシュ動作を開始する前に2次電池の電気容量を検
出し、その検出値を基に、この2次電池に接続する負荷
の大きさを決定することを特徴とする2次電池のリフレ
ッシュ装置により、前記目的を達成しようとするもので
ある。
(2) Further, in the refresh device for preventing the memory effect of the secondary battery, the electric capacity of the secondary battery is detected before starting the refresh operation, and based on the detected value, An object of the present invention is to achieve the above object by a refreshing device for a secondary battery, which is characterized in that the magnitude of the load connected to the secondary battery is determined.

【0015】(3)さらにまた、2次電池のメモリ効果
を防止するためのリフレッシュ方法において、前記2次
電池の電池容量が、第1の所定値に達するまでは、所定
の電流値で放電を行い、前記第1の所定値に達した後
は、電流値を徐々に下げ乍ら、前記2次電池の電池容量
が、前記第1の所定値よりも小さい第2の所定値に達す
るまでの放電を行うことにより、リフレッシュ動作を完
了させることを特徴とする2次電池のリフレッシュ方法
により、前記目的を達成しようとするものである。
(3) Furthermore, in the refresh method for preventing the memory effect of the secondary battery, the secondary battery is discharged at a predetermined current value until the battery capacity reaches a first predetermined value. After reaching the first predetermined value, the current value is gradually reduced until the battery capacity of the secondary battery reaches a second predetermined value smaller than the first predetermined value. It is an object of the present invention to achieve the above object by a refreshing method of a secondary battery, which is characterized in that a refreshing operation is completed by discharging.

【0016】[0016]

【作用】以上のような本発明方法及び装置により、最初
は比較的大きな電流値で、ある程度のレベルまで放電を
行い、その後、徐々に放電電流を絞り込むという制御に
より、リフレッシュ動作の所要時間を短縮し得る。
With the method and apparatus of the present invention as described above, the time required for the refresh operation is shortened by controlling the discharge to a certain level at a relatively large current value and then gradually reducing the discharge current. You can

【0017】[0017]

【実施例】以下に本発明を複数の実施例に基づいて説明
する; (実施例1)図1に、本発明に係る2次電池のリフレッ
シュ装置の第1の実施例の構成ブロック図を示す。ま
ず、この構成要素を説明する。なお、図1において、前
記従来例図4におけると同一(相当)構成要素は同一符
号で表わす。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on a plurality of embodiments; (Embodiment 1) FIG. 1 is a block diagram showing the configuration of a first embodiment of a secondary battery refreshing device according to the present invention. . First, these components will be described. In FIG. 1, the same (corresponding) constituent elements as in FIG. 4 of the conventional example are represented by the same reference numerals.

【0018】1は、リフレッシュ動作を受ける2次電
池、2は、この2次電池1の端子電圧を検出するための
電圧検出手段、3は、電圧検出手段2の検出値と所定値
との大小を比較するための比較手段、4は、2次電池1
のリフレッシュを行うための放電抵抗アレー、5は、抵
抗4と2次電池1とを接続するための接続手段、そし
て、6は、これらのシステムを統括するためのMPUで
ある。
Reference numeral 1 is a secondary battery which is subjected to a refresh operation, 2 is voltage detection means for detecting the terminal voltage of the secondary battery 1, and 3 is the magnitude of the detection value of the voltage detection means 2 and a predetermined value. Comparing means for comparing 4 is a secondary battery 1
Is a discharge resistor array for refreshing the battery, 5 is a connecting unit for connecting the resistor 4 and the secondary battery 1, and 6 is an MPU for controlling these systems.

【0019】以上のような構成において、放電抵抗アレ
ー4は、本実施例では、抵抗1本当たりに流れる電流は
0.2C程度であり、全体で1C程度の放電を行えるも
のとする。また、接続手段5は、リレーやトランジスタ
などのように、電気的にオン/オフ制御が可能なもので
ある必要がある。
In the above structure, the discharge resistor array 4 has a current of about 0.2 C per resistor in the present embodiment, and is capable of discharging about 1 C as a whole. The connecting means 5 needs to be electrically controllable on / off, such as a relay or a transistor.

【0020】次に、本構成の動作シーケンスのフローチ
ャートを図2に示す。以下、この図に基づいて説明す
る;まず、2次電池1がこのリフレッシュ手段に接続さ
れると、MPU6は、上記構成の初期化を行い(ステッ
プS01:n=n0 )、そして、接続手段5に対し、2
次電池1にn本の放電抵抗4(放電電流は1C程度)を
接続するよう指定する(ステップS02)。
Next, FIG. 2 shows a flowchart of the operation sequence of this configuration. Hereinafter, description will be given based on this drawing; first, when the secondary battery 1 is connected to this refreshing means, the MPU 6 initializes the above-mentioned configuration (step S01: n = n 0 ), and then the connecting means. 2 for 5
It is designated to connect n discharge resistors 4 (discharge current is about 1 C) to the secondary battery 1 (step S02).

【0021】2次電池1を抵抗アレー4に接続後、リフ
レッシュ動作は開始される(ステップS03)。このと
き、2次電池1の端子電圧値Vbattは、電圧検出手段2
により、定期的に検出される(ステップS04)。検出
された値は、比較手段3に送られ、閾値Vthとの比較が
行われる(ステップS05)。
After connecting the secondary battery 1 to the resistor array 4, the refresh operation is started (step S03). At this time, the terminal voltage value V batt of the secondary battery 1 is the voltage detection means 2
Is periodically detected (step S04). The detected value is sent to the comparison means 3 and compared with the threshold value V th (step S05).

【0022】検出された端子電圧値Vbattが閾値Vth
達していない場合(ステップS05→No)、さらに、
リフレッシュ動作が継続される(ステップS03)。端
子電圧値Vbattが閾値Vth以下になった場合(ステップ
S05→Yes)、2次電池に接続される放電抵抗4の
本数は1本減らし、放電電流の絞り込み(絞り込まれる
電流は0.2C程度)を行い、リフレッシュ動作が再開
される(ステップS07−No→ステップS02→ステ
ップS03)。このとき、通常、端子電圧値Vbattは閾
値Vth以上に復帰する。
If the detected terminal voltage value V batt has not reached the threshold value V th (step S05 → No),
The refresh operation is continued (step S03). When the terminal voltage value V batt becomes equal to or less than the threshold value V th (step S05 → Yes), the number of the discharge resistors 4 connected to the secondary battery is reduced by one, and the discharge current is narrowed down (the current to be narrowed down is 0.2C. (Step S07-No → step S02 → step S03). At this time, the terminal voltage value V batt normally returns to the threshold value V th or more.

【0023】この後、「リフレッシュ動作(ステップS
03)→端子電圧値Vbattが閾値Vth以下になる(ステ
ップS05→Yes)→放電抵抗4をさらに1本減らす
(ステップS07−No)→リフレッシュ動作(ステッ
プS03)」というシーケンスが繰り返される。このと
き、2次電池1に接続される放電抵抗4が、残り1本に
なった場合(ステップS06→Yes)、2次電池1の
端子電圧値Vbattが推奨の放電終止電圧Vend 以下にな
るまで放電が行われ(放電電流値は0.2C程度)、リ
フレッシュ動作は完了する(ステップS07−Yes→
ステップS08→ステップS09)。
After this, the "refresh operation (step S
03) → terminal voltage value V batt becomes equal to or lower than the threshold value V th (step S05 → Yes) → the discharge resistance 4 is further reduced by one (step S07-No) → refresh operation (step S03). At this time, when the number of discharge resistors 4 connected to the secondary battery 1 is one (step S06 → Yes), the terminal voltage value V batt of the secondary battery 1 becomes equal to or lower than the recommended discharge end voltage V end . The discharge is performed (the discharge current value is about 0.2 C) until the refresh operation is completed (step S07-Yes →
Step S08 → step S09).

【0024】上記動作は、最初、1Cの電流値にて、あ
る程度のレベルまで放電が行われる。よって、リフレッ
シュ動作の所要時間は、最長でも1時間程度にしかなら
ない。
In the above operation, first, discharge is performed to a certain level with a current value of 1C. Therefore, the time required for the refresh operation is only about 1 hour at the longest.

【0025】さらに、本動作について、多少の説明を補
足する;まず、閾値Vthと放電停止電圧Vend の関係で
あるが、閾値Vthは放電終止電圧Vend より、若干大き
く設定する必要がある。その度合いとしては、放電電圧
値Vbattの時間に対する変化率が大きくなり始めるあた
りが適当である(図3の閾値Vth選定線図参照)。
Further, a little explanation of this operation will be supplemented; first, regarding the relationship between the threshold value V th and the discharge stop voltage V end , the threshold value V th needs to be set slightly higher than the discharge end voltage V end. is there. As the degree, it is appropriate that the rate of change of the discharge voltage value V batt with respect to time starts to increase (see the threshold V th selection diagram in FIG. 3).

【0026】なお、抵抗アレー4については、この抵抗
の本数は特に指定されない。一般に、この本数が多いほ
ど、放電電流値は密に制御される。ただし、リフレッシ
ュ完了時の放電電流値が0.3C以下になるように設定
する必要がある。
For the resistor array 4, the number of resistors is not specified. In general, the larger this number is, the more closely the discharge current value is controlled. However, it is necessary to set the discharge current value when the refresh is completed to be 0.3 C or less.

【0027】(実施例2)前記実施例1の構成のみで
は、以下のような不具合がある。すなわち、2次電池1
の残容量が非常に少ない場合、この状態で1C放電から
のリフレッシュを行うと、2次電池1の端子電圧値V
battが、急激に放電停止電圧Vend 以下に落ち込んでし
まう怖れがある。これは、2次電池1の寿命を短くする
現象である。
(Embodiment 2) Only the structure of Embodiment 1 has the following problems. That is, the secondary battery 1
When the remaining capacity of the secondary battery is very small, refreshing from 1C discharge in this state causes the terminal voltage value V of the secondary battery 1.
There is a fear that batt may suddenly fall below the discharge stop voltage V end . This is a phenomenon that shortens the life of the secondary battery 1.

【0028】このような状況を回避するため、前記実施
例1の動作シーケンスに入る前に、以下のような初期動
作を付け加える。すなわち、2次電池1が本構成に装着
された時点で、まず、その端子電圧値Vbattを検出す
る。次に、比較手段3により、端子電圧の検出値Vbatt
と2種類の値との間の大小関係を比較する。そして、例
えば、2つの値をV1 ,V2 (Vend <V1 <V2 )と
した場合、以下のように2次電池1の残容量に対する判
断を下す。
In order to avoid such a situation, the following initial operation is added before the operation sequence of the first embodiment is started. That is, when the secondary battery 1 is mounted in this configuration, first, its terminal voltage value V batt is detected. Next, the comparison means 3 detects the detected value V batt of the terminal voltage.
And the magnitude relationship between the two values. Then, for example, when the two values are V 1 and V 2 (V end <V 1 <V 2 ), the remaining capacity of the secondary battery 1 is determined as follows.

【0029】(状態−1)→Vbatt>V2 のとき…2次
電池の電気容量は、充分に残っている, (状態−2)→V1 <Vbatt<V2 のとき…2次電池の
電気容量は、ある程度残っている, (状態−3)→V1 >Vbattのとき…2次電池の電気容
量は、ほとんど残っていない。
When (state-1) → V batt > V 2 ... The electric capacity of the secondary battery remains sufficiently, (state-2) → when V 1 <V batt <V 2 ... secondary The electric capacity of the battery remains to some extent, (state-3) → when V 1 > V batt ... The electric capacity of the secondary battery hardly remains.

【0030】上記3つの状況に応じ、MPU6は、以下
のようなリフレッシュ動作を行う; (状態−1)→n0 本の放電抵抗により、リフレッシュ
を開始する(n=n0 ), (状態−2)→n0 /2本の放電抵抗により、リフレッ
シュを開始する(n=n0 /2), (状態−3)リフレッシュを行わない, これ以降の動作は、実施例1におけると同じである。
According to the above three situations, the MPU 6 performs the following refresh operation: (state-1) → refresh is started by n 0 discharge resistors (n = n 0 ), (state- by 2) → n 0/2 pieces of the discharge resistor, to start a refresh (n = n 0/2) , it is not performed (the state -3) refresh, subsequent operation is the same as in example 1 .

【0031】以上の制御動作により、残容量の少ない2
次電池に、大きな放電電流を印加するという事態を防止
することができる。また、電池の残容量を正しく把握
し、必要のない場合はリフレッシュを行わないという効
率の良い動作をも実現している。
By the above control operation, the remaining capacity is small.
It is possible to prevent a situation in which a large discharge current is applied to the secondary battery. It also realizes an efficient operation in which the remaining capacity of the battery is correctly grasped and refreshing is not performed when it is not necessary.

【0032】さらに、本動作について若干の説明を補足
すると、本実施例2では、2次電池1の端子電圧の検出
値Vbattと2種類の値との間の比較により、その制御動
作を決定していた。しかし、比較する値の個数は、実際
は、いくつであっても差支えない。
Further, supplementing a little explanation of this operation, in the second embodiment, the control operation is determined by comparing the detected value V batt of the terminal voltage of the secondary battery 1 and two kinds of values. Was. However, the number of values to be compared does not matter in practice.

【0033】また、端子電圧値Vbattの検出時、無負荷
の状態で電圧検出を行うより、0.2C程度の電流を印
加した状態の方が検出精度は向上する。
Further, when the terminal voltage value V batt is detected, the detection accuracy is improved when a current of about 0.2 C is applied, as compared with the case where the voltage is detected without a load.

【0034】[0034]

【発明の効果】以上説明したように、本発明によれば、
最初は、比較的大きな電流値で、ある程度のレベルまで
放電を行い、その後、徐々に放電電流を絞り込むという
制御動作により、リフレッシュ動作の所要時間を短縮さ
せることができた。
As described above, according to the present invention,
Initially, the discharge was performed to a certain level with a relatively large current value, and then the control operation of gradually narrowing the discharge current could shorten the time required for the refresh operation.

【図面の簡単な説明】[Brief description of drawings]

【図1】 第1実施例の構成ブロック図FIG. 1 is a configuration block diagram of a first embodiment.

【図2】 第1実施例の動作シーケンスフローチャートFIG. 2 is an operation sequence flowchart of the first embodiment.

【図3】 閾値Vthの選定線図FIG. 3 is a selection diagram of a threshold value V th

【図4】 従来の2次電池のリフレッシュ手段の1構成
FIG. 4 is a configuration example of a conventional refreshing means for a secondary battery.

【符号の説明】[Explanation of symbols]

1 2次電池 2 電圧検出手段 3 比較手段 4 放電抵抗アレー 5 接続手段 6 MPU 7 スイッチ(従来例) 8 放電抵抗(従来例) Vbatt 端子電圧 Vth 閾値 Vend 放電終止電圧1 Secondary Battery 2 Voltage Detection Means 3 Comparison Means 4 Discharge Resistance Array 5 Connection Means 6 MPU 7 Switch (Conventional Example) 8 Discharge Resistance (Conventional Example) V batt Terminal Voltage V th Threshold V end Discharge End Voltage

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 2次電池のメモリ効果を防止するための
リフレッシュ装置において、この2次電池の電気容量を
検出する手段と、この2次電池の放電を行うための複数
の負荷素子と、この負荷素子を選択して前記2次電池を
接続するための接続手段とを有し、複数の負荷を前記2
次電池に接続して、大きな電流値でリフレッシュ動作を
開始し、ある程度この2次電池の電気容量が減少した
後、この2次電池に接続する負荷を順次減らしていき、
所定の電流値で所定の放電終止の電気容量値まで2次電
池を放電させることにより、リフレッシュ動作を完了さ
せることを特徴とする2次電池のリフレッシュ装置。
1. A refreshing device for preventing a memory effect of a secondary battery, a means for detecting an electric capacity of the secondary battery, a plurality of load elements for discharging the secondary battery, And a connecting means for connecting the secondary battery by selecting a load element, and connecting a plurality of loads to the secondary battery.
After connecting to the secondary battery and starting a refresh operation with a large current value, and after the electric capacity of the secondary battery has decreased to some extent, the load connected to the secondary battery is gradually reduced.
A refreshing device for a secondary battery, characterized in that a refreshing operation is completed by discharging the secondary battery with a predetermined current value up to a predetermined discharge end electric capacity value.
【請求項2】 前記2次電池のメモリ効果を防止するた
めのリフレッシュ装置において、リフレッシュ動作を開
始する前に2次電池の電気容量を検出し、その検出値を
基に、この2次電池に接続する負荷の大きさを決定する
ことを特徴とする請求項1記載の2次電池のリフレッシ
ュ装置。
2. A refreshing device for preventing a memory effect of the secondary battery, wherein an electric capacity of the secondary battery is detected before starting a refresh operation, and the secondary battery is detected based on the detected value. The refreshing device for a secondary battery according to claim 1, wherein the magnitude of a load to be connected is determined.
【請求項3】 2次電池のメモリ効果を防止するための
リフレッシュ方法において、前記2次電池の電池容量
が、第1の所定値に達するまでは、所定の電流値で放電
を行い、前記第1の所定値に達した後は、電流値を徐々
に下げ乍ら、前記2次電池の電池容量が、前記第1の所
定値よりも小さい第2の所定値に達するまでの放電を行
うことにより、リフレッシュ動作を完了させることを特
徴とする2次電池のリフレッシュ方法。
3. A refresh method for preventing a memory effect of a secondary battery, wherein the secondary battery is discharged at a predetermined current value until the battery capacity reaches a first predetermined value, and the second battery is discharged. After reaching a predetermined value of 1, the current value is gradually reduced to perform discharging until the battery capacity of the secondary battery reaches a second predetermined value that is smaller than the first predetermined value. A refresh method for a secondary battery, characterized in that the refresh operation is completed according to the above.
JP6279256A 1994-11-14 1994-11-14 Refreshing method for secondary battery and its device Withdrawn JPH08138746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6279256A JPH08138746A (en) 1994-11-14 1994-11-14 Refreshing method for secondary battery and its device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6279256A JPH08138746A (en) 1994-11-14 1994-11-14 Refreshing method for secondary battery and its device

Publications (1)

Publication Number Publication Date
JPH08138746A true JPH08138746A (en) 1996-05-31

Family

ID=17608631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6279256A Withdrawn JPH08138746A (en) 1994-11-14 1994-11-14 Refreshing method for secondary battery and its device

Country Status (1)

Country Link
JP (1) JPH08138746A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000277168A (en) * 1999-03-25 2000-10-06 Yamaha Motor Co Ltd Method for refreshing discharge of secondary battery
JP2007250521A (en) * 2006-02-16 2007-09-27 Denso Corp Voltage regulator of battery pack
JP2008072883A (en) * 2006-09-15 2008-03-27 Fujitsu Ltd Battery refreshment device and method
JP2009181910A (en) * 2008-01-31 2009-08-13 Panasonic Corp Charging and discharging control method and charging and discharging control system for alkaline storage battery
EP3086399A4 (en) * 2013-12-18 2017-06-14 Bluelife Battery S.L. Method for regenerating nimh batteries
CN108199577A (en) * 2017-12-21 2018-06-22 重庆菲力斯特科技有限公司 DC high-voltage power supply decompression control device, method and DC high-voltage power supply dropping equipment
JP2022544695A (en) * 2019-11-13 2022-10-20 エルジー エナジー ソリューション リミテッド Forced discharge test device and forced discharge test method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000277168A (en) * 1999-03-25 2000-10-06 Yamaha Motor Co Ltd Method for refreshing discharge of secondary battery
JP2007250521A (en) * 2006-02-16 2007-09-27 Denso Corp Voltage regulator of battery pack
JP2008072883A (en) * 2006-09-15 2008-03-27 Fujitsu Ltd Battery refreshment device and method
JP2009181910A (en) * 2008-01-31 2009-08-13 Panasonic Corp Charging and discharging control method and charging and discharging control system for alkaline storage battery
EP3086399A4 (en) * 2013-12-18 2017-06-14 Bluelife Battery S.L. Method for regenerating nimh batteries
CN108199577A (en) * 2017-12-21 2018-06-22 重庆菲力斯特科技有限公司 DC high-voltage power supply decompression control device, method and DC high-voltage power supply dropping equipment
JP2022544695A (en) * 2019-11-13 2022-10-20 エルジー エナジー ソリューション リミテッド Forced discharge test device and forced discharge test method

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