JPH0678471A - Charging method - Google Patents

Charging method

Info

Publication number
JPH0678471A
JPH0678471A JP4228896A JP22889692A JPH0678471A JP H0678471 A JPH0678471 A JP H0678471A JP 4228896 A JP4228896 A JP 4228896A JP 22889692 A JP22889692 A JP 22889692A JP H0678471 A JPH0678471 A JP H0678471A
Authority
JP
Japan
Prior art keywords
voltage
battery
charging
constant
circuit
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.)
Granted
Application number
JP4228896A
Other languages
Japanese (ja)
Other versions
JP3152512B2 (en
Inventor
Mikitaka Tamai
幹隆 玉井
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP22889692A priority Critical patent/JP3152512B2/en
Priority to TW82106452A priority patent/TW228616B/en
Priority to US08/111,976 priority patent/US5442274A/en
Publication of JPH0678471A publication Critical patent/JPH0678471A/en
Application granted granted Critical
Publication of JP3152512B2 publication Critical patent/JP3152512B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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

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

Abstract

PURPOSE:To prevent overcharge of a battery by detecting a residual capacity of the battery before charging of the battery is started and by conducting constant-current charging for boosting the battery to an excess voltage only when the residual capacity of the battery is smaller than a set capacity. CONSTITUTION:First a residual capacity of a battery is detected. The residual capacity is detected from a battery voltage. When a closed-circuit voltage of the battery is lower than a first voltage V1, the residual capacity is determined to be smaller than a set capacity and constant-current charging is started. The battery of which an open-circuit voltage is lower than the first voltage V1 is charged with a constant current or a quasi-constant current so as to be boosted to a second voltage V2 higher than the first voltage V1. When the battery voltage rises to the second voltage V2, charging is further executed with the constant current and a constant voltage until a third voltage V3 higher than the second voltage V2 is reached. In this process, the battery voltage is raised to the third voltage V3 being an excess voltage. In this case, a set voltage E2 for the constant-voltage charging is set higher than the third voltage V3. According to this constitution, overcharge of the battery can be prevented.

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、主として非水系二次電
池の充電に使用される充電方法に関し、とくに、充電時
間を短縮して過充電による電池性能の低下を防止できる
急速充電方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging method mainly used for charging non-aqueous secondary batteries, and more particularly to a rapid charging method capable of shortening charging time and preventing deterioration of battery performance due to overcharging.

【0002】[0002]

【従来の技術】二次電池の急速充電方法として、定電流
充電した後、定電圧電流に切り換える方法が開発されて
いる(特開平3−251054号公報)。この公報に記
載される充電方法は、電池電圧が設定値になるまでは定
電流充電し、電圧が設定値に上昇した後は、電池の電圧
が異常に上昇して電池性能が低下しないように、定電圧
充電に切り換えるものである。この方法は、定電流充電
するときの充電電流を大きくすることによって満充電す
るまでの時間を短くできる。しかしながら、大電流で充
電するためには、充電装置を大型化する必要があり、装
置がコストアップする。また、電池の最大充電電流は、
電池性能を低下させないように設計する必要がある。電
池の最大充電電流は、電池を満充電する時間を制限す
る。このため、充電電流を大きくする方法では、満充電
時間に制約を受ける。
2. Description of the Related Art As a method of rapidly charging a secondary battery, a method of switching to a constant voltage current after constant current charging has been developed (JP-A-3-251054). The charging method described in this publication performs constant current charging until the battery voltage reaches a set value, and after the voltage rises to the set value, the battery voltage does not rise abnormally and battery performance is not degraded. , To switch to constant voltage charging. In this method, the time until full charge can be shortened by increasing the charging current during constant current charging. However, in order to charge with a large current, it is necessary to upsize the charging device, which increases the cost of the device. Also, the maximum charging current of the battery is
It must be designed so as not to reduce battery performance. The maximum battery charging current limits the time to fully charge the battery. Therefore, in the method of increasing the charging current, the full charging time is restricted.

【0003】この欠点を解消する充電方法が特開平2−
119539号公報に記載されている。この公報に記載
される充電方法は、鉛蓄電池を急速充電するものであ
る。この方法は、電池電圧と充電電流とを図1に示すよ
うに設定している。すなわち、最初の定電流充電で、電
池の電圧が多少高くなるまで充電し、その後に、定電圧
充電するものである。この充電方法は、定電流充電する
ときの電池の最終電圧(V2)を、定電圧充電の設定電
圧(V1)よりも高く設定することによって、鉛蓄電池
を満充電する時間を短くするものである。
A charging method that solves this drawback is disclosed in Japanese Patent Application Laid-Open No. HEI 2-
It is described in Japanese Patent Publication No. 119539. The charging method described in this publication is for rapidly charging a lead storage battery. In this method, the battery voltage and the charging current are set as shown in FIG. That is, in the first constant current charging, the battery is charged until the voltage becomes slightly higher, and then the constant voltage charging is performed. In this charging method, the final voltage (V2) of the battery during constant current charging is set higher than the set voltage (V1) for constant voltage charging, thereby shortening the time required to fully charge the lead acid battery. .

【0004】[0004]

【発明が解決しようとする課題】この公報に記載される
方法は、定電圧充電すると、次第に電流が減少して満充
電に時間がかかるのを、定電流充電時間を長くすること
によって解消し、トータルの充電時間を短縮するもので
ある。したがって、この充電方法は、充電時間を短縮で
きる特長がある。ただ、この充電方法は、満充電時間を
短くするために、一時的に、電池電圧を超過電圧まで上
昇させるので、満充電した電池を充電すると過充電する
欠点がある。すなわち、図1の斜線で示す部分では電池
電圧が超過電圧まで上昇するので、満充電した電池を充
電すると、図1の斜線で示す超過電圧領域で、電池性能
を低下させる弊害がある。それは、満充電した電池を、
さらに超過電圧まで電圧上昇させて充電するからであ
る。したがって、この充電方法は充電時間を短くできる
特長はあるが、例えばリチウムイオン二次電池等の非水
系二次電池を充電すると、電池性能を著しく低下させる
欠点がある。この欠点は、図1に示すように、電池電圧
を超過電圧に上昇させない充電方法によって解消でき
る。しかしながら、この充電方法は、充電時間が長くな
る欠点がある。したがって、従来の充電方法は、充電時
間を短くして、電池の過充電を防止することができな
い。
The method described in this publication solves the problem that the constant current charging gradually decreases the current and takes a long time to fully charge, by eliminating the constant current charging time. It shortens the total charging time. Therefore, this charging method has a feature that the charging time can be shortened. However, this charging method has a drawback that the battery voltage is temporarily raised to an overvoltage in order to shorten the full-charge time, so that the fully-charged battery is overcharged. That is, since the battery voltage rises to the overvoltage in the shaded portion of FIG. 1, charging a fully charged battery has the adverse effect of reducing the battery performance in the shaded excess voltage region of FIG. It is a fully charged battery,
This is because the voltage is further raised to the excess voltage for charging. Therefore, although this charging method has a feature that the charging time can be shortened, there is a drawback that charging a non-aqueous secondary battery such as a lithium ion secondary battery significantly lowers battery performance. This drawback can be solved by a charging method that does not raise the battery voltage to an overvoltage, as shown in FIG. However, this charging method has a drawback that the charging time is long. Therefore, the conventional charging method cannot shorten the charging time and prevent overcharging of the battery.

【0005】本発明は、さらにこの欠点を解決すること
を目的に開発されたもので、電池電圧が異常に上昇する
ときに起こる過充電による電池性能の低下を極減して、
充電時間を短縮できる電池の充電方法を提供することに
ある。
The present invention was further developed with the object of solving this drawback, and it is possible to minimize the deterioration of battery performance due to overcharging which occurs when the battery voltage rises abnormally,
An object of the present invention is to provide a battery charging method capable of shortening the charging time.

【0006】[0006]

【課題を解決するための手段】本発明の電池の充電方法
は、前述の目的を達成するために、下記の方法で電池を
充電する。すなわち、本発明の方法は、定電流充電した
後に定電圧充電する充電方法であって、定電流充電工程
において、電池の最大上昇電圧が、定電圧充電の設定電
圧よりも高くなる超過電圧まで定電流充電する充電方法
を改良したものである。
In order to achieve the above-mentioned object, the battery charging method of the present invention charges the battery by the following method. That is, the method of the present invention is a charging method of performing constant voltage charging after constant current charging, and in the constant current charging step, the maximum rising voltage of the battery is constant until an excess voltage at which the maximum voltage is higher than the set voltage for constant voltage charging. This is an improvement of the charging method for current charging.

【0007】本発明の充電方法は、過充電による電池性
能の低下を防止するために、電池の充電を開始する前
に、電池の残存容量を検出する。残存容量が設定容量よ
りも小さいものに限って、超過電圧まで電圧を上昇させ
る定電流充電を行うことを特徴とする。
The charging method of the present invention detects the remaining capacity of the battery before starting the charging of the battery in order to prevent the deterioration of the battery performance due to overcharging. It is characterized in that constant current charging for increasing the voltage to an excess voltage is performed only when the remaining capacity is smaller than the set capacity.

【0008】[0008]

【作用】本発明の電池の充電方法は、最初に電池の残存
容量を検出し、充分に放電されている電池にかぎって超
過電圧となるまで定電流充電する。残存容量が大きく、
満充電ないしは満充電に近い電池は、超過電圧になるま
で定電流充電しない。このようにして、電池を超過電圧
になるまで定電流充電したときの電池性能の低下を防止
する。充分に放電して残存容量が少なくなった電池は、
多少は超過電圧になるまで定電流充電しても、これによ
る電池性能の低下はほとんど問題にならない。
According to the battery charging method of the present invention, the remaining capacity of the battery is first detected, and only the fully discharged battery is charged with a constant current until the overvoltage is reached. The remaining capacity is large,
Full-charge or near full-charge batteries do not charge with constant current until overvoltage is reached. In this way, it is possible to prevent the deterioration of the battery performance when the battery is charged with a constant current until the voltage becomes overvoltage. Batteries that have been fully discharged and have a low remaining capacity are
Even if the battery is charged with a constant current until the overvoltage becomes a little overvoltage, the deterioration of the battery performance due to this is hardly a problem.

【0009】[0009]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。ただし、以下に示す実施例は、本発明の技術思想
を具体化するための充電方法を例示するものであって、
本発明の充電方法は、充電条件、充電回路、充電装置の
フローチャート、設定電圧等を下記に特定するものでな
い。本発明の電池の充電方法は、特許請求の範囲におい
て、種々の変更を加えることができる。
Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate a charging method for embodying the technical idea of the present invention,
The charging method of the present invention does not specify the charging conditions, the charging circuit, the flowchart of the charging device, the set voltage, etc. below. The battery charging method of the present invention can be modified in various ways within the scope of the claims.

【0010】本発明の充電方法は、過充電による電池性
能の低下を防止するために、電池の充電を開始する前
に、電池の残存容量を検出する。残存容量が設定容量よ
りも小さいものに限って、図2〜図5に示す電圧電流特
性に従って、定電流充電した後、定電圧充電する。電池
の残存容量は、充電を開始する前に電池の開路電圧を検
出するか、あるいは、電池の充電量と放電量から計算す
ることもできる。電圧を検出する方法は、残存容量を簡
単に検出できる。以下、リチウムイオン二次電池等の非
水系二次電池の充電方法を図2〜図5に基づいて説明す
る。
According to the charging method of the present invention, in order to prevent deterioration of battery performance due to overcharging, the remaining capacity of the battery is detected before the charging of the battery is started. Only when the remaining capacity is smaller than the set capacity, constant-current charging is performed and then constant-voltage charging according to the voltage-current characteristics shown in FIGS. The remaining capacity of the battery can be calculated by detecting the open circuit voltage of the battery before starting charging, or can be calculated from the amount of charge and the amount of discharge of the battery. The method of detecting the voltage can easily detect the remaining capacity. Hereinafter, a method for charging a non-aqueous secondary battery such as a lithium ion secondary battery will be described with reference to FIGS.

【0011】図2に示す充電方法は、下記の〜の工
程で電池を充電する。 最初に電池の残存容量を検出する。残存容量は電池
電圧で検出する。電池の開路電圧が第1電圧V1よりも
低いと、残存容量が設定容量よりも少ないと判定して、
定電流充電を開始する。電池の開路電圧が第1電圧V1
よりも高いと、残存容量が大きいと判定し、図に示す電
圧、電流特性で充電しない。開路電圧が第1電圧V1よ
りも低い電池は、第1電圧V1よりも高い第2電圧V2ま
で、定電流または準定電流充電する。 電池電圧が第2電圧V2に上昇すると、さらに第2
電圧V2よりも高い第3電圧V3になるまで定電流、定電
圧充電する。この工程で、電池電圧は超過電圧である第
3電圧V3まで上昇する。この充電工程において、定電
圧充電の設定電圧(E2)は第3電圧V3よりも高く設定
する。 電池電圧が第3電圧V3に上昇したとき、定電圧充
電の設定電圧を、E2からE1に低下させる。E1は第1
電圧V1よりも高く、第3電圧V3よりも低く調整され
る。定電圧充電の設定電圧E1は、電池の第4電圧V4を
決定する。この図は、第4電圧V4と第2電圧V2とを設
定電圧E1として同じ電圧にしている。ただ、第4電圧
V4は必ずしも第2電圧V2に等しくする必要はない。第
4電圧V4は第3電圧V3よりも低く、第1電圧V1より
も高く、非水系二次電池を過充電することなく満充電で
きる電圧に設定される。
In the charging method shown in FIG. 2, the battery is charged in the following steps (1) to (3). First, the remaining capacity of the battery is detected. The remaining capacity is detected by the battery voltage. When the open circuit voltage of the battery is lower than the first voltage V1, it is determined that the remaining capacity is less than the set capacity,
Start constant current charging. The open circuit voltage of the battery is the first voltage V1.
If it is higher than that, it is determined that the remaining capacity is large, and charging is not performed with the voltage-current characteristics shown in the figure. A battery whose open circuit voltage is lower than the first voltage V1 is charged with a constant current or a quasi-constant current to a second voltage V2 which is higher than the first voltage V1. When the battery voltage rises to the second voltage V2, the second voltage
Constant-current and constant-voltage charging is performed until the third voltage V3, which is higher than the voltage V2, is reached. In this step, the battery voltage rises to the overvoltage third voltage V3. In this charging step, the set voltage (E2) for constant voltage charging is set higher than the third voltage V3. When the battery voltage rises to the third voltage V3, the set voltage for constant voltage charging is lowered from E2 to E1. E1 is the first
The voltage is adjusted to be higher than the voltage V1 and lower than the third voltage V3. The set voltage E1 for constant voltage charging determines the fourth voltage V4 of the battery. In this figure, the fourth voltage V4 and the second voltage V2 are the same voltage as the set voltage E1. However, the fourth voltage V4 does not necessarily have to be equal to the second voltage V2. The fourth voltage V4 is lower than the third voltage V3 and higher than the first voltage V1, and is set to a voltage at which the non-aqueous secondary battery can be fully charged without overcharging.

【0012】図3に示す充電方法は、下記の〜の工
程で電池を充電する。 この工程は、図2に示すと同じ方法で電池容量を
検出して充電する。 電池電圧が第2電圧V2になると、タイマーがカウ
ントを開始し、タイマーがカウントを終了するまで、定
電圧、定電流充電する。定電圧充電の設定電圧(E2)
は、第3電圧V3よりも高く設定される。この工程にお
ける充電時間(T)はタイマーに特定される。タイマー
の設定時間(T)は、電池電圧が第2電圧V2以上に上
昇する時間を制限して、電池性能が低下しない時間に設
定される。 電池の電圧を、第2電圧V2以上の電圧として一定
時間(T)充電した後、定電圧充電する設定電圧をE2
からE1に低下し、電池電圧を第4電圧V4として定電圧
充電する。第4電圧V4は、第2電圧V2に等しく調整し
ている。
In the charging method shown in FIG. 3, the battery is charged in the following steps (1) to (3). In this step, the battery capacity is detected and charged by the same method as shown in FIG. When the battery voltage reaches the second voltage V2, the timer starts counting, and constant voltage and constant current charging is performed until the timer finishes counting. Set voltage for constant voltage charging (E2)
Is set higher than the third voltage V3. The charging time (T) in this step is specified by the timer. The set time (T) of the timer limits the time during which the battery voltage rises above the second voltage V2 and is set to a time during which the battery performance does not deteriorate. After the battery voltage is charged to a voltage equal to or higher than the second voltage V2 for a certain time (T), the set voltage for constant voltage charging is E2.
To E1 and the battery voltage is constant voltage charged with the fourth voltage V4. The fourth voltage V4 is adjusted to be equal to the second voltage V2.

【0013】図4に示す充電方法は、下記の〜の工
程で電池を充電する。 この工程は図2に示すと同じ方法で電池容量を検
出して充電する。 電池電圧が第2電圧V2になると、タイマーがカウ
ントを開始し、タイマーがセットアップするまで定電
圧、定電流充電する。このとき、定電圧充電の設定電圧
(E2)は電池電圧が上昇する第3電圧V3に設定され
る。この工程における充電時間(T)はタイマーに設定
されている。タイマーの設定時間(T)は、電池電圧が
第2電圧V2以上に上昇する時間を制限して、電池性能
が低下しない時間に設定される。また、定電圧充電の設
定電圧(E2)は、タイマーがカウントする途中で電池
電圧が上昇する電圧であって、電池の性能低下を少なく
できる電圧に設定される。 定電圧充電の設定電圧をE2とし、電池電圧が第3
電圧V3となるまで、一定時間(T)、定電圧、定電流
充電する。その後、定電圧充電する設定電圧をE2から
E1に切り換えて、電池電圧を第4電圧V4として定電圧
充電する。第4電圧V4は、第2電圧V2に等しく調整し
ている。
In the charging method shown in FIG. 4, the battery is charged in the following steps (1) to (3). In this step, the battery capacity is detected and charged by the same method as shown in FIG. When the battery voltage reaches the second voltage V2, the timer starts counting, and constant voltage and constant current charging is performed until the timer is set up. At this time, the set voltage (E2) for constant voltage charging is set to the third voltage V3 at which the battery voltage rises. The charging time (T) in this step is set by a timer. The set time (T) of the timer limits the time during which the battery voltage rises above the second voltage V2 and is set to a time during which the battery performance does not deteriorate. Further, the set voltage (E2) for constant voltage charging is a voltage at which the battery voltage rises while the timer is counting, and is set to a voltage that can reduce deterioration of the battery performance. The set voltage for constant voltage charging is E2, and the battery voltage is the third
Constant voltage, constant current charging is performed for a fixed time (T) until the voltage reaches V3. After that, the set voltage for constant voltage charging is switched from E2 to E1, and constant voltage charging is performed with the battery voltage as the fourth voltage V4. The fourth voltage V4 is adjusted to be equal to the second voltage V2.

【0014】さらに、図5に示す充電方法は、下記の
〜の工程で電池を充電する。 この工程は、図2に示すと同じ方法で電池容量を
検出して充電する。 電池電圧が第2電圧V2になると、定電圧、定電流
充電する。定電圧充電の設定電圧(E2)は、電池電圧
が上昇する第3電圧V3に設定される。電池電圧が第3
電圧V3に上昇すると、タイマーがカウントを開始す
る。タイマーの設定時間(T)は、電池電圧が第3電圧
V3となる時間を制限して、電池性能が低下しない時間
に設定される。また、定電圧充電の設定電圧(E2)
は、電池電圧が上昇する電圧であって、電池の性能低下
を少なくできる電圧に設定される。 定電圧充電の設定電圧(E2)として、一定時間
(T)、定電圧、定電流充電した後、定電圧充電する設
定電圧をE2からE1に低下して、電池電圧を第4電圧V
4に低下させて定電圧充電する。第4電圧V4は、第2電
圧V2に等しく調整している。
Further, in the charging method shown in FIG. 5, the battery is charged in the following steps (1) to (3). In this step, the battery capacity is detected and charged by the same method as shown in FIG. When the battery voltage reaches the second voltage V2, constant voltage and constant current charging is performed. The set voltage (E2) for constant voltage charging is set to the third voltage V3 at which the battery voltage rises. Battery voltage is third
When the voltage rises to V3, the timer starts counting. The set time (T) of the timer limits the time when the battery voltage becomes the third voltage V3 and is set to a time when the battery performance does not deteriorate. Also, set voltage for constant voltage charging (E2)
Is a voltage at which the battery voltage rises and is set to a voltage that can reduce deterioration of the battery performance. As the set voltage (E2) for constant voltage charging, after the constant voltage and constant current charging for a fixed time (T), the set voltage for constant voltage charging is reduced from E2 to E1 to set the battery voltage to the fourth voltage V.
Reduce to 4 and charge at a constant voltage. The fourth voltage V4 is adjusted to be equal to the second voltage V2.

【0015】さらに、図5に示す充電方法は、電池電圧
が第3電圧V3となる時間をタイマーでカウントするの
に代わって、充電電流が設定値以下に低下したことを検
出して、定電圧充電の設定電圧をE2からE1に低下させ
ることもできる。
Further, in the charging method shown in FIG. 5, instead of counting the time when the battery voltage becomes the third voltage V3 with a timer, it is detected that the charging current has dropped below a set value and a constant voltage is detected. The set voltage for charging can be lowered from E2 to E1.

【0016】以上の方法で電池を充電する回路のブロッ
ク図を図6に、配線図を図7に示している。ただし、こ
れ等の回路は、図2ないし図5に示すように、第2電圧
V2と第4電圧V4とを同じ電圧(E1)に設定して電池
を充電する回路を示している。図に示す充電回路は、リ
チウムイオン二次電池等の非水系二次電池を充電するも
のである。この充電回路は、充電用の電源1と、電源1
の出力を制御して電池の充電状態を制御する充電制御手
段2とを備える。
A block diagram of the circuit for charging the battery by the above method is shown in FIG. 6, and a wiring diagram is shown in FIG. However, as shown in FIGS. 2 to 5, these circuits show circuits for charging the battery by setting the second voltage V2 and the fourth voltage V4 to the same voltage (E1). The charging circuit shown in the figure charges a non-aqueous secondary battery such as a lithium ion secondary battery. This charging circuit includes a power supply 1 for charging and a power supply 1
Charging control means 2 for controlling the output of the battery and the charging state of the battery.

【0017】電源1は、AC100Vの商用電源に含ま
れる雑音を除去する入力フィルター3と、入力された交
流を直流に変換する整流回路4と、整流回路4の直流を
高周波の交流に変換するスイッチング部5であるトラン
ジスター6と、交流を所定の電圧に変換する変換トラン
ス7と、変換トランス7の交流出力を整流して平滑な直
流に変換する整流平滑回路8と、スイッチング部5を制
御して直流出力を制御するPWM制御回路9と、PWM
制御回路9に、充電制御手段2からの信号を電気的に絶
縁して入力するフォトカプラ10とを備えている。
The power supply 1 includes an input filter 3 for removing noise contained in a commercial power supply of 100 VAC, a rectifier circuit 4 for converting the input alternating current into direct current, and a switching for converting the direct current of the rectifier circuit 4 into high frequency alternating current. The transistor 6, which is the unit 5, the conversion transformer 7 that converts alternating current into a predetermined voltage, the rectifying and smoothing circuit 8 that rectifies the alternating current output of the converting transformer 7 into smooth DC, and controls the switching unit 5. PWM control circuit 9 for controlling DC output, and PWM
The control circuit 9 is provided with a photocoupler 10 for electrically insulating and inputting a signal from the charging control means 2.

【0018】充電制御手段2は、スイッチング素子11
と、出力調整回路12と、演算回路13と、電圧検出回
路14と、電流検出回路15とを備える。
The charging control means 2 includes a switching element 11
An output adjusting circuit 12, an arithmetic circuit 13, a voltage detecting circuit 14, and a current detecting circuit 15.

【0019】スイッチング素子11は、演算回路13の
出力でオンオフに切り換えられる。スイッチング素子1
1は、オンの状態で、電池を電源の出力に接続して充電
する。オフになると、電池を電源から分離して充電を停
止する。
The switching element 11 is turned on / off by the output of the arithmetic circuit 13. Switching element 1
1 is in the on state and connects the battery to the output of the power supply to charge. When turned off, it disconnects the battery from the power source and stops charging.

【0020】出力調整回路12は、定電圧充電回路16
と、定電流充電回路17とを備える。定電圧充電回路1
6と定電流充電回路17は作動アンプ16A、17Aを
備える。
The output adjusting circuit 12 is a constant voltage charging circuit 16
And a constant current charging circuit 17. Constant voltage charging circuit 1
6 and the constant current charging circuit 17 include operation amplifiers 16A and 17A.

【0021】定電圧充電回路16の作動アンプ16A
は、+側入力端子を、分圧抵抗を介して電池に接続して
いる。−側入力端子は、切換スイッチ18を介して基準
電源E1、E2に接続される。作動アンプ16A、17A
の出力はダイオードを介してフォトカプラ10に接続さ
れている。この回路の定電圧充電回路16は、作動アン
プ16Aの+側入力端子の電圧、すなわち電池の分圧電
圧を、−側に接続された基準電圧に比較して、作動アン
プ16Aの出力を+−に反転させる。電池の電圧が設定
電圧よりも高くなると、+側の電圧が−側の基準電圧よ
りも高くなる。そうすると、作動アンプ16Aの出力は
+となり、ダイオードに電流が流れなくなってフォトカ
プラ10の発光ダイオードは発光しなくなる。この状態
になると、PWM制御回路9はスイッチング部5である
トランジスター6を制御して出力を低下させる。定電圧
充電回路16の基準電圧E1は、電池の第2電圧V2と第
4電圧V4とを決定する。基準電圧E2は、電池の第3電
圧V3を決定し、あるいは第3電圧V3よりも高く設定さ
れる。
Operation amplifier 16A of constant voltage charging circuit 16
Connects the + side input terminal to the battery via a voltage dividing resistor. The-side input terminal is connected to the reference power sources E1 and E2 via the changeover switch 18. Operation amplifier 16A, 17A
Is connected to the photocoupler 10 via a diode. The constant voltage charging circuit 16 of this circuit compares the voltage of the + side input terminal of the operational amplifier 16A, that is, the divided voltage of the battery with the reference voltage connected to the − side, and outputs the output of the operational amplifier 16A by −−. Flip to. When the battery voltage becomes higher than the set voltage, the + side voltage becomes higher than the − side reference voltage. Then, the output of the operational amplifier 16A becomes +, the current does not flow through the diode, and the light emitting diode of the photocoupler 10 does not emit light. In this state, the PWM control circuit 9 controls the transistor 6 which is the switching unit 5 to reduce the output. The reference voltage E1 of the constant voltage charging circuit 16 determines the second voltage V2 and the fourth voltage V4 of the battery. The reference voltage E2 determines the third voltage V3 of the battery or is set higher than the third voltage V3.

【0022】定電流充電回路17は、作動アンプ17A
の+側入力端子を電流検出抵抗に接続し、−側を基準電
源に接続している。この回路は、電池の充電電流が設定
値よりも大きくなると、作動アンプ17Aの+側入力端
子の電圧が−側の基準電圧より高くなる。この状態で作
動アンプ17Aは出力電圧を+とし、ダイオードを逆バ
イアスとしてフォトカプラ10の発光ダイオードを発光
させなくする。この状態で、PWM制御回路9はトラン
ジスター6を制御して出力を低く制御して、電池の充電
電流を少なくする。したがって、定電流充電回路17
は、電池の充電電流が設定値よりも大きくなるのを防止
して、定電流充電する。
The constant current charging circuit 17 includes an operational amplifier 17A.
The + input terminal of is connected to the current detection resistor and the-side is connected to the reference power supply. In this circuit, when the charging current of the battery becomes larger than the set value, the voltage at the + side input terminal of the operational amplifier 17A becomes higher than the − side reference voltage. In this state, the operational amplifier 17A sets the output voltage to +, and the diode is reverse biased so that the light emitting diode of the photocoupler 10 does not emit light. In this state, the PWM control circuit 9 controls the transistor 6 to control the output to be low to reduce the charging current of the battery. Therefore, the constant current charging circuit 17
Will prevent the charging current of the battery from becoming larger than the set value and perform constant current charging.

【0023】演算回路13は、電圧検出回路14と電流
検出回路15の出力信号を演算処理して、スイッチング
素子11と、切換スイッチ18とを切り換える。演算回
路13は充電をスタートするときにスイッチング素子1
1をオンとし、充電を完了するとスイッチング素子11
をオフにする。また、演算回路13は、定電圧充電の設
定電圧をE1とE2に切り換えるときに、切換スイッチ1
8を制御する。さらに、演算回路13はタイマー(図示
せず)を内蔵しており、タイマーと、電圧検出回路14
と、電流検出回路15とから入力される信号を処理し
て、スイッチング素子11と切換スイッチ18とを切り
換える。
The arithmetic circuit 13 arithmetically processes the output signals of the voltage detection circuit 14 and the current detection circuit 15 to switch between the switching element 11 and the changeover switch 18. The arithmetic circuit 13 switches the switching element 1 when starting charging.
When 1 is turned on and charging is completed, the switching element 11
Turn off. Also, the arithmetic circuit 13 switches the changeover switch 1 when changing the set voltage for constant voltage charging to E1 and E2.
Control eight. Further, the arithmetic circuit 13 has a timer (not shown) built therein, and the timer and the voltage detection circuit 14 are provided.
Then, the signal input from the current detection circuit 15 is processed to switch between the switching element 11 and the changeover switch 18.

【0024】演算回路13は、電池電圧が第2電圧V2
から第3電圧V3に上昇するまでは、定電圧充電回路1
6の設定電圧をE2とする。ただ、電池電圧が第2電圧
V2に上昇するまでは、定電圧充電回路16の設定電圧
をE1とすることもできる。電池電圧を第3電圧V3から
第4電圧V4にするとき、演算回路13は切換スイッチ
18を制御して、設定電圧をE2からE1に低下させる。
演算回路13が切換スイッチ18を切り換えて、設定電
圧をE2からE1に低下させるのは、電池電圧を検出し、
あるいはタイマーの信号による。
In the arithmetic circuit 13, the battery voltage is the second voltage V2.
From the constant voltage charging circuit 1 until the third voltage V3 rises
The set voltage of 6 is E2. However, the set voltage of the constant voltage charging circuit 16 can be set to E1 until the battery voltage rises to the second voltage V2. When changing the battery voltage from the third voltage V3 to the fourth voltage V4, the arithmetic circuit 13 controls the changeover switch 18 to decrease the set voltage from E2 to E1.
The arithmetic circuit 13 switches the changeover switch 18 to decrease the set voltage from E2 to E1 by detecting the battery voltage,
Or by the signal of the timer.

【0025】演算回路13は、電流検出回路15から電
池の充電電流を検出し、電池の充電電流が小さくなって
電池が満充電になると、スイッチング素子11をオフに
して充電を停止する。また、演算回路13は、定電流充
電から定電圧充電に切り換えた後、一定時間充電してス
イッチング素子11をオフに切り換えることもできる。
The arithmetic circuit 13 detects the charging current of the battery from the current detecting circuit 15, and when the charging current of the battery becomes small and the battery is fully charged, the switching element 11 is turned off to stop the charging. Further, the arithmetic circuit 13 can switch the constant current charge to the constant voltage charge, and then charge the battery for a certain period of time to switch off the switching element 11.

【0026】この充電回路は、図8に示すフローチャー
トでリチウムイオン二次電池等の非水系二次電池を充電
する。このフローチャートは、図2に示す電圧、電流特
性で非水系二次電池を充電する。 [n=1のステップ]スタートした後、電池の充電を開
始する前に、電池の開路電圧(Vo)をサンプリングす
る。 [n=2のステップ]開路電圧(Vo)が第1電圧V1以
下であるかどうかを判断する。
This charging circuit charges a non-aqueous secondary battery such as a lithium ion secondary battery according to the flow chart shown in FIG. This flowchart charges the non-aqueous secondary battery with the voltage-current characteristics shown in FIG. [Step n = 1] After the start, before the charging of the battery is started, the open circuit voltage (Vo) of the battery is sampled. [Step n = 2] It is determined whether the open circuit voltage (Vo) is the first voltage V1 or less.

【0027】[n=3のステップ]開路電圧(Vo)が
第1電圧V1以下である電池は、充分に放電された電池
である。いいかえると、第1電圧V1は、充分に放電さ
れた電池を識別できる電圧に設定されている。開路電圧
(Vo)が第1電圧V1よりも低く、充分に放電された電
池と判定されると、切換スイッチ18でもって定電圧充
電回路16の設定電圧をE2とする。 [n=4のステップ]スイッチング素子11をオンにし
て充電を開始する。この状態で、電池は定電流充電され
て電圧が次第に上昇する。 [n=5のステップ]充電中の電池の閉路電圧(Vc)
を、電圧検出回路14でサンプリングして演算回路13
に入力する。 [n=6のステップ]電池の閉路電圧(Vc)が第3電
圧V3に等しく、あるいはこれよりも大きいかどうかを
演算回路13が判定する。
[Step n = 3] A battery whose open circuit voltage (Vo) is the first voltage V1 or less is a fully discharged battery. In other words, the first voltage V1 is set to a voltage that can identify a fully discharged battery. When the open circuit voltage (Vo) is lower than the first voltage V1 and it is determined that the battery is sufficiently discharged, the set voltage of the constant voltage charging circuit 16 is set to E2 by the changeover switch 18. [Step n = 4] The switching element 11 is turned on to start charging. In this state, the battery is charged with a constant current and the voltage gradually rises. [Step of n = 5] Closing voltage (Vc) of battery during charging
Is sampled by the voltage detection circuit 14 and the arithmetic circuit 13
To enter. [Step n = 6] The arithmetic circuit 13 determines whether the closed circuit voltage (Vc) of the battery is equal to or larger than the third voltage V3.

【0028】[n=7のステップ]電池の閉路電圧(V
c)が第3電圧V3に等しく、あるいはこれより大きい
と、切換スイッチ18を切り換えて、定電圧充電回路1
6の設定電圧をE2からE1に低下させる。設定電圧がE
1になると電池電圧は、第4電圧V4となる。図2に示す
充電方法は、第4電圧V4を第2電圧V2に等しくしてい
る。閉路電圧(Vc)が第3電圧V3よりも低いときは、
n=5のステップにループして、閉路電圧(Vc)が第
3電圧V3になるまで、定電流充電する。 [n=8のステップ]設定電圧をE1として、電池電圧
を第4電圧V4に調整して定電圧充電するようになる
と、電流検出回路15は、電池の充電電流をサンプリン
グして演算回路13に入力する。 [n=9のステップ]演算回路13は、検出した充電電
流がほぼ0に減少したかどうかを検出する。すなわち、
電池が満充電になると、充電電流はほぼ0になるので、
満充電になったかどうかを検出する。 [n=10のステップ]定電圧充電して電池の充電電流
がほぼ0になると、演算回路13がスイッチング素子1
1をオフに切り換えて充電を停止する。充電電流がほぼ
0に減少するまでは、n=8のステップにループして、
満充電になるまで定電圧充電する。
[Step of n = 7] Battery closing voltage (V
When c) is equal to or larger than the third voltage V3, the changeover switch 18 is switched to change the constant voltage charging circuit 1
The set voltage of 6 is reduced from E2 to E1. Set voltage is E
When it becomes 1, the battery voltage becomes the fourth voltage V4. In the charging method shown in FIG. 2, the fourth voltage V4 is made equal to the second voltage V2. When the closed circuit voltage (Vc) is lower than the third voltage V3,
Looping to the step of n = 5, constant current charging is performed until the closed circuit voltage (Vc) reaches the third voltage V3. [Step n = 8] When the set voltage is set to E1 and the battery voltage is adjusted to the fourth voltage V4 to perform constant voltage charging, the current detection circuit 15 samples the charging current of the battery to the arithmetic circuit 13. input. [Step n = 9] The arithmetic circuit 13 detects whether the detected charging current has decreased to almost zero. That is,
When the battery is fully charged, the charging current becomes almost 0, so
Detects whether the battery is fully charged. [Step of n = 10] When the battery is charged with a constant voltage and the charging current of the battery becomes almost 0, the arithmetic circuit 13 switches the switching element 1
Turn off 1 to stop charging. Until the charging current decreases to almost 0, loop through the steps of n = 8,
Charge at a constant voltage until the battery is fully charged.

【0029】[n=11のステップ]n=2のステップ
で、開路電圧(Vo)が第1電圧V1よりも低くない、す
なわち第1電圧V1よりも高いと判定された電池は、開
路電圧(Vo)が第2電圧V2以下であるかどうかを判定
する。電池の開路電圧(Vo)が第2電圧V2よりも低く
ない、すなわち第2電圧V2よりも高いと判定される
と、充電を開始することなく終了する。 [n=12の工程]電池の開路電圧(Vo)が第2電圧
V2よりも低いと判定されると、定電圧充電回路16の
設定電圧をE1とする。電池の開路電圧(Vo)が第1電
圧V1よりも高く、第2電圧V2よりも低い電池は、充分
に放電されず、また、満充電されない電池である。 [n=13のステップ]スイッチング素子11をオンし
て充電を開始する。 この状態で、電池は定電圧充電回
路16によって電池の最大上昇電圧がE1に制限され
る。したがって、電池は、定電圧充電回路16と定電流
充電回路17とによって、定電圧、定電流充電される。
その後、n=8のステップにジャンプして充電される。
[Step n = 11] In the step n = 2, the battery whose open circuit voltage (Vo) is not lower than the first voltage V1, that is, higher than the first voltage V1 is the open circuit voltage (Vo). Vo) is less than or equal to the second voltage V2. If it is determined that the open circuit voltage (Vo) of the battery is not lower than the second voltage V2, that is, higher than the second voltage V2, the charging is terminated without starting. [Process of n = 12] When it is determined that the open circuit voltage (Vo) of the battery is lower than the second voltage V2, the set voltage of the constant voltage charging circuit 16 is set to E1. A battery whose open circuit voltage (Vo) is higher than the first voltage V1 and lower than the second voltage V2 is a battery that is not fully discharged or fully charged. [Step n = 13] The switching element 11 is turned on to start charging. In this state, the constant voltage charging circuit 16 limits the maximum voltage rise of the battery to E1. Therefore, the battery is charged with a constant voltage and a constant current by the constant voltage charging circuit 16 and the constant current charging circuit 17.
Then, it jumps to the step of n = 8 and is charged.

【0030】さらに、図6と図7に示す充電回路は、図
9のフローチャートで、図3に示す電圧、電流特性で非
水系二次電池を充電することができる。 [n=1〜5のステップは図4のフローチャートと同
じ] [n=6−1のステップ]定電圧充電して上昇する電池
の閉路電圧(Vc)が、第2電圧V2以上となったかどう
かを判定する。 [n=6−2のステップ]電池の閉路電圧(Vc)が第
2電圧V2以上になると、タイマーによって設定時間T
を経過したかどうかを判定する。設定時間Tを経過する
までループする。すなわち、この方法は、閉路電圧(V
c)が第2電圧V2を越えた状態における充電を、時間で
制限する。 [n=7〜13のステップは図4のフローチャートと同
じ]
Further, the charging circuit shown in FIGS. 6 and 7 can charge the non-aqueous secondary battery with the voltage and current characteristics shown in FIG. 3 in the flowchart of FIG. [Steps of n = 1 to 5 are the same as those in the flowchart of FIG. 4] [Steps of n = 6-1] Whether the closed circuit voltage (Vc) of the battery that rises due to constant voltage charging becomes equal to or higher than the second voltage V2. To judge. [Step n = 6-2] When the closed circuit voltage (Vc) of the battery becomes equal to or higher than the second voltage V2, the timer sets the time T.
Is determined. Loop until the set time T elapses. That is, this method uses the closed circuit voltage (V
The charging in the state where c) exceeds the second voltage V2 is limited by time. [The steps of n = 7 to 13 are the same as those in the flowchart of FIG. 4]

【0031】図4に示す電圧、電流カーブで非水系二次
電池を充電する場合、図9のn=3のステップにおい
て、定電圧充電回路16の設定電圧E2を、第3電圧V3
に設定する。すなわち、図3に示す充電方法に比較し
て、E2を多少低く設定して、超過電圧による電池の性
能低下を防止する。
When the non-aqueous secondary battery is charged with the voltage / current curve shown in FIG. 4, the set voltage E2 of the constant voltage charging circuit 16 is changed to the third voltage V3 in the step of n = 3 in FIG.
Set to. That is, as compared with the charging method shown in FIG. 3, E2 is set to be slightly lower to prevent the performance of the battery from being deteriorated due to overvoltage.

【0032】さらにまた、図5に示す電圧、電流特性で
電池を充電する場合、n=6−1とn=6−2のステッ
プにおいて、電池の閉路電圧(Vc)が第3電圧V3以上
になったかどうかを判定し、閉路電圧(Vc)が第3電
圧V3以上になると、タイマーのカウントを開始させ
る。タイマーの設定時間は、図3に示す電圧、電流特性
で充電するのに比較して、短く設定される。それは、タ
イマーがカウントを開始する電池の閉路電圧(Vc)を
高く設定するからである。
Further, when the battery is charged with the voltage-current characteristics shown in FIG. 5, the closed circuit voltage (Vc) of the battery becomes equal to or higher than the third voltage V3 in the steps of n = 6-1 and n = 6-2. If the closed circuit voltage (Vc) becomes equal to or higher than the third voltage V3, the timer starts counting. The set time of the timer is set shorter than that for charging with the voltage and current characteristics shown in FIG. This is because the timer sets the closed circuit voltage (Vc) of the battery at which counting starts high.

【0033】[0033]

【発明の効果】本発明の電池の充電方法は、電池の過充
電を防止して、短時間に急速充電できる優れた特長を実
現する。とくに、本発明の充電方法は、非水系二次電池
のように過充電すると電池性能が低下しやすい電池を、
過充電によって電池性能を低下させることなく、短時間
で急速充電できる特長がある。それは、本発明の充電方
法が、一時的に超過電圧となるまで定電流充電をした後
設定電圧を低くして定電圧充電することに加えて、充電
を開始する最初に、電池の電圧等を測定して残存容量を
測定し、残存容量が設定値よりも低い電池に限って、超
過電圧に電圧を上昇して充電するからである。すなわ
ち、満充電に近い電池は残存容量が多く、これを超過電
圧に電圧上昇して定電流充電すると、過充電になって電
池性能が低下する。しかしながら、本発明の充電方法
は、超過電圧に電圧上昇して定電流充電しても電池性能
が低下しないことを、充電の最初に検出する。このた
め、充電に先だって、一時的に超過電圧になっても過充
電にならない電池であるかどうかを判定して、超過電圧
まで定電流充電する。このため、本発明の電池の充電方
法は、電池の過充電を防止できることに加えて、充電時
間を短縮できるという、互いに相反する特長を実現する
ことができる。
The battery charging method of the present invention prevents battery overcharging and realizes an excellent feature that allows rapid charging in a short time. In particular, the charging method of the present invention uses a battery whose battery performance is likely to deteriorate when overcharged, such as a non-aqueous secondary battery,
It has the feature that it can be charged rapidly in a short time without degrading the battery performance due to overcharging. That is, the charging method of the present invention, in addition to performing constant current charging until the voltage temporarily becomes overvoltage and then lowering the set voltage to perform constant voltage charging, the voltage of the battery, etc., is first set at the start of charging. This is because the remaining capacity is measured and the remaining capacity is measured, and only the battery whose remaining capacity is lower than the set value is charged by increasing the voltage to the excess voltage. That is, a battery that is close to full charge has a lot of remaining capacity, and if the battery is charged to a constant voltage with an overvoltage, it is overcharged and the battery performance deteriorates. However, the charging method of the present invention detects at the beginning of charging that the battery performance does not decrease even if the battery is charged at a constant current by increasing the voltage to an overvoltage. Therefore, prior to charging, it is determined whether or not the battery is not overcharged even if the overvoltage is temporarily generated, and constant current charging is performed up to the overvoltage. Therefore, the battery charging method of the present invention can prevent the battery from being overcharged, and can realize the contradictory features that the charging time can be shortened.

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

【図1】従来の充電方法の電圧、電流特性を示すグラフFIG. 1 is a graph showing voltage and current characteristics of a conventional charging method.

【図2】本発明の実施例にかかる充電方法の電圧、電流
特性を示すグラフ
FIG. 2 is a graph showing voltage-current characteristics of the charging method according to the example of the present invention.

【図3】本発明の実施例にかかる充電方法の電圧、電流
特性を示すグラフ
FIG. 3 is a graph showing voltage-current characteristics of the charging method according to the example of the present invention.

【図4】本発明の実施例にかかる充電方法の電圧、電流
特性を示すグラフ
FIG. 4 is a graph showing voltage-current characteristics of a charging method according to an example of the present invention.

【図5】本発明の実施例にかかる充電方法の電圧、電流
特性を示すグラフ
FIG. 5 is a graph showing voltage-current characteristics of the charging method according to the example of the present invention.

【図6】本発明の充電方法に使用する充電回路のブロッ
ク線図
FIG. 6 is a block diagram of a charging circuit used in the charging method of the present invention.

【図7】本発明の充電方法に使用する充電回路のブロッ
ク線図
FIG. 7 is a block diagram of a charging circuit used in the charging method of the present invention.

【図8】図2に示す電圧、電流特性で電池を充電するフ
ローチャート
FIG. 8 is a flowchart for charging a battery with the voltage-current characteristics shown in FIG.

【図9】図3に示す電圧、電流特性で電池を充電するフ
ローチャート
9 is a flowchart for charging a battery with the voltage-current characteristics shown in FIG.

【符号の説明】[Explanation of symbols]

1…電源 2…充電制御手段 3…入力フィルター 4…整流回路 5…スイッチング部 6…トランジスター 7…変換トランス 8…整流平滑回路 9…PWM制御回路 10…フォトカプラ 11…スイッチング素子 12…出力調整回路 13…演算回路 14…電圧検出回路 15…電流検出回路 16…定電圧充電回路 16A…作動アンプ 17…定電流充電回路 17A…作動アンプ 18…切換スイッチ DESCRIPTION OF SYMBOLS 1 ... Power supply 2 ... Charge control means 3 ... Input filter 4 ... Rectifier circuit 5 ... Switching part 6 ... Transistor 7 ... Conversion transformer 8 ... Rectification smoothing circuit 9 ... PWM control circuit 10 ... Photo coupler 11 ... Switching element 12 ... Output adjustment circuit 13 ... Arithmetic circuit 14 ... Voltage detection circuit 15 ... Current detection circuit 16 ... Constant voltage charging circuit 16A ... Operation amplifier 17 ... Constant current charging circuit 17A ... Operation amplifier 18 ... Changeover switch

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 定電流充電した後に定電圧充電する充電
方法であって、定電流充電工程において、電池の最大上
昇電圧が、定電圧充電の設定電圧よりも高くなる超過電
圧まで定電流充電する充電方法において、 電池の充電を開始する前に電池の残存容量を検出し、残
存容量が設定容量よりも小さいものに限って、超過電圧
まで電圧を上昇させる定電流充電を行うことを特徴とす
る充電方法。
1. A charging method for performing constant voltage charging after constant current charging, wherein in the constant current charging step, constant current charging is performed to an excess voltage at which the maximum rising voltage of the battery is higher than the set voltage for constant voltage charging. In the charging method, the remaining capacity of the battery is detected before starting the charging of the battery, and only when the remaining capacity is smaller than the set capacity, constant current charging for increasing the voltage to the excess voltage is performed. How to charge.
JP22889692A 1992-08-27 1992-08-27 Charging method Expired - Fee Related JP3152512B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP22889692A JP3152512B2 (en) 1992-08-27 1992-08-27 Charging method
TW82106452A TW228616B (en) 1992-08-27 1993-08-12 Method for charging a secondary cell
US08/111,976 US5442274A (en) 1992-08-27 1993-08-26 Rechargeable battery charging method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22889692A JP3152512B2 (en) 1992-08-27 1992-08-27 Charging method

Publications (2)

Publication Number Publication Date
JPH0678471A true JPH0678471A (en) 1994-03-18
JP3152512B2 JP3152512B2 (en) 2001-04-03

Family

ID=16883560

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22889692A Expired - Fee Related JP3152512B2 (en) 1992-08-27 1992-08-27 Charging method

Country Status (1)

Country Link
JP (1) JP3152512B2 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
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JPH10243567A (en) * 1997-02-26 1998-09-11 Fuji Photo Film Co Ltd Device and method for charging secondary battery
JP2003087990A (en) * 2001-09-14 2003-03-20 Ricoh Co Ltd Charging circuit for secondary battery
JP2003092843A (en) * 2001-09-20 2003-03-28 Ricoh Co Ltd Charging circuit of secondary battery
USRE40223E1 (en) 1998-05-27 2008-04-08 Matsushita Electric Industrial Co., Ltd. Method for charging secondary battery
US8013577B2 (en) 2006-12-04 2011-09-06 Panasonic Corporation Charging system, charging apparatus and battery pack
US8111035B2 (en) 2006-11-29 2012-02-07 Panasonic Corporation Charging system, charging device and battery pack
US8183832B2 (en) 2007-02-19 2012-05-22 Panasonic Corporation Charging system, charger, and battery pack
CN103036286A (en) * 2012-12-07 2013-04-10 重庆大学 Safe charge-discharge control method of all-vanadium redox flow battery comprising direct current / direct current (DC / DC) converter
JP2013537792A (en) * 2010-07-15 2013-10-03 ゼットパワー, エルエルシー Method and apparatus for recharging a battery
US8796996B2 (en) 2009-06-18 2014-08-05 Panasonic Corporation Charge control circuit, battery pack, and charge system
JP2016510585A (en) * 2013-01-17 2016-04-07 ルノー エス.ア.エス. Battery charge management
JP2018082511A (en) * 2016-11-14 2018-05-24 株式会社村田製作所 Charger, electronic apparatus, electric vehicle and power system
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10243567A (en) * 1997-02-26 1998-09-11 Fuji Photo Film Co Ltd Device and method for charging secondary battery
USRE40223E1 (en) 1998-05-27 2008-04-08 Matsushita Electric Industrial Co., Ltd. Method for charging secondary battery
JP2003087990A (en) * 2001-09-14 2003-03-20 Ricoh Co Ltd Charging circuit for secondary battery
JP4499966B2 (en) * 2001-09-14 2010-07-14 株式会社リコー Secondary battery charging circuit
JP2003092843A (en) * 2001-09-20 2003-03-28 Ricoh Co Ltd Charging circuit of secondary battery
JP4502554B2 (en) * 2001-09-20 2010-07-14 株式会社リコー Secondary battery charging circuit
US8111035B2 (en) 2006-11-29 2012-02-07 Panasonic Corporation Charging system, charging device and battery pack
US8013577B2 (en) 2006-12-04 2011-09-06 Panasonic Corporation Charging system, charging apparatus and battery pack
US8183832B2 (en) 2007-02-19 2012-05-22 Panasonic Corporation Charging system, charger, and battery pack
US8796996B2 (en) 2009-06-18 2014-08-05 Panasonic Corporation Charge control circuit, battery pack, and charge system
JP2013537792A (en) * 2010-07-15 2013-10-03 ゼットパワー, エルエルシー Method and apparatus for recharging a battery
CN103036286A (en) * 2012-12-07 2013-04-10 重庆大学 Safe charge-discharge control method of all-vanadium redox flow battery comprising direct current / direct current (DC / DC) converter
JP2016510585A (en) * 2013-01-17 2016-04-07 ルノー エス.ア.エス. Battery charge management
JP2018082511A (en) * 2016-11-14 2018-05-24 株式会社村田製作所 Charger, electronic apparatus, electric vehicle and power system
CN110687955A (en) * 2019-11-22 2020-01-14 浙江嘉科电子有限公司 Constant voltage and constant current control output power circuit
CN110687955B (en) * 2019-11-22 2024-03-15 浙江嘉科电子有限公司 Constant voltage constant current control output power supply circuit

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