JP2005102453A - Device for controlling charging of storage battery - Google Patents

Device for controlling charging of storage battery Download PDF

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JP2005102453A
JP2005102453A JP2003335730A JP2003335730A JP2005102453A JP 2005102453 A JP2005102453 A JP 2005102453A JP 2003335730 A JP2003335730 A JP 2003335730A JP 2003335730 A JP2003335730 A JP 2003335730A JP 2005102453 A JP2005102453 A JP 2005102453A
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temperature
charging
current value
storage battery
charger
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Katsuhiko Kamiya
克彦 神谷
Kunito Togashi
邦人 富樫
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Araco Co Ltd
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Araco Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/25—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by controlling the electric load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/15—Preventing overcharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/80—Time limits
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To make a charging time shorter than a prior art by reducing a current value to continue charging when the temperature of a storage battery reaches an upper limit temperature. <P>SOLUTION: This device is provided with a first temperature detecting means (a thermometer 40) that detects the temperature of a charger (a constant current source 20); and a charge controlling means (a controlling device 10) that controls the continuation of the charging of the storage battery (a sealed battery 60) with a second current value that is lower than a first current value, and that does not raise the temperature of the charger when the temperature detected by the first temperature detecting means reaches the upper limit temperature after starting the charge of the storage battery with the first current value. This control makes the temperature of the charger drop after reaching the upper limit temperature or remain at the upper limit temperature in a worst case. Since no charging current is cut unlike conventional technology, the charging time can be made shorter than by the conventional technology. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、蓄電池を充電する制御を行う充電制御装置に関する。   The present invention relates to a charge control device that performs control for charging a storage battery.

従来では、バッテリの周囲温度を検出し、当該周囲温度が使用上限温度に達すると充電電流をカットして充電を止める技術が開示されている（例えば特許文献１を参照）。この技術では目標の充電電圧に達しないため、使用上限温度よりは低い所定温度まで周囲温度が下がると、再び充電電流を流して充電を行う。この場合、周囲温度が再び使用上限温度に達したときは、充電電流をカットして充電を止めることになる。
実開平２−６８６３９号公報（第６−７頁，第１図） Conventionally, a technique has been disclosed in which the ambient temperature of a battery is detected, and when the ambient temperature reaches a use upper limit temperature, the charging current is cut to stop charging (see, for example, Patent Document 1). In this technique, since the target charging voltage is not reached, when the ambient temperature falls to a predetermined temperature lower than the upper limit temperature of use, charging is performed by supplying a charging current again. In this case, when the ambient temperature reaches the use upper limit temperature again, the charging current is cut and the charging is stopped.
Japanese Utility Model Publication No. 2-68639 (page 6-7, Fig. 1)

従来の技術では、一定の充電電流を流したりカットする制御を繰り返すことになるので、充電電流をカットして充電を止めるとバッテリ電圧が低下し、目標の充電電圧に達するまでに要する時間（すなわち充電時間）が長くなってしまう。
本発明はこのような点に鑑みてなしたものであり、蓄電池の温度が上限温度に達したときには電流値を下げて充電を継続することにより、従来よりも充電時間を短縮可能な蓄電池の充電制御装置を提供することを目的とする。 In the conventional technique, since the control for flowing or cutting a constant charging current is repeated, the battery voltage decreases when the charging current is cut and the charging is stopped, and the time required to reach the target charging voltage (that is, (Charging time) becomes longer.
The present invention has been made in view of such points, and when the temperature of the storage battery reaches the upper limit temperature, the charging of the storage battery can be shortened more than before by reducing the current value and continuing the charging. An object is to provide a control device.

課題を解決するための手段は、充電器により蓄電池を充電する制御を行う蓄電池の充電制御装置であって、
前記充電器の温度を検出する第１温度検出手段と、
第１電流値で前記蓄電池の充電を始めた後に、前記第１温度検出手段によって検出した温度が上限温度に達すると、前記第１電流値よりも低くかつ前記充電器の温度を上昇させない第２電流値で前記蓄電池の充電を継続する制御を行う充電制御手段とを有することを要旨とする。
なお「充電器の温度」は直接的または間接的に検出可能な温度であればよく、例えば充電器内部の温度、充電器の表面温度、充電器の周辺温度などが該当する。 Means for solving the problem is a storage battery charging control device that performs control to charge the storage battery by a charger,
First temperature detecting means for detecting the temperature of the charger;
When the temperature detected by the first temperature detecting means reaches the upper limit temperature after starting the charging of the storage battery at the first current value, the second temperature is lower than the first current value and does not increase the temperature of the charger. The gist of the invention is to have charging control means for performing control for continuing charging of the storage battery with a current value.
The “charger temperature” may be a temperature that can be detected directly or indirectly, and includes, for example, the temperature inside the charger, the surface temperature of the charger, the ambient temperature of the charger, and the like.

上述した構成によれば、蓄電池の充電を始めた後に、第１温度検出手段によって検出した温度（以下では単に「充電器温度」と呼ぶ。）が上限温度に達すると、充電制御手段は第１電流値よりも低い第２電流値で充電を継続する。しかも、当該第２電流値は充電を継続しても、充電器温度を上昇させない程度の電流である。例えば一定の充電効率の下で第２電流値を第１電流値の７０％にすれば、充電器の発熱量はほぼ半分になる。放熱量が発熱量よりも大きくなれば、充電器温度は低下する。よって、第２電流値は放熱量とほぼ等しい発熱量をもたらす電流値とするのが望ましい。この制御によれば、充電器温度が上限温度に達した後は低下するか、最悪の場合でも上限温度を維持するにとどまる。従来技術のように充電電流をカットしないので、充電時間を従来よりも短縮できる。   According to the above-described configuration, when the temperature detected by the first temperature detecting means (hereinafter simply referred to as “charger temperature”) reaches the upper limit temperature after starting the charging of the storage battery, the charging control means first Charging is continued at a second current value lower than the current value. Moreover, the second current value is a current that does not increase the charger temperature even if the charging is continued. For example, if the second current value is set to 70% of the first current value under a constant charging efficiency, the calorific value of the charger is almost halved. If the heat dissipation amount becomes larger than the heat generation amount, the charger temperature decreases. Therefore, it is desirable that the second current value is a current value that provides a heat generation amount substantially equal to the heat dissipation amount. According to this control, the charger temperature decreases after reaching the upper limit temperature, or the upper limit temperature is maintained even in the worst case. Since the charging current is not cut as in the prior art, the charging time can be shortened compared to the conventional technique.

本発明によれば、充電器温度が上限温度に達したときには電流値を下げて充電を継続するので、従来よりも充電時間を短縮することができる。   According to the present invention, when the charger temperature reaches the upper limit temperature, the current value is decreased and the charging is continued, so that the charging time can be shortened compared to the conventional case.

次に、本発明を実施するための最良の形態について、実施例に従って説明する。   Next, the best mode for carrying out the present invention will be described with reference to examples.

本実施例は、電動車等に用いられる完全密閉型のシールバッテリを充電する充電制御装置に本発明を適用した例であって、図１〜図３を参照しながら説明する。なお、温度にかかる数値は摂氏である。   The present embodiment is an example in which the present invention is applied to a charge control device for charging a completely sealed battery used in an electric vehicle or the like, and will be described with reference to FIGS. The numerical value related to the temperature is Celsius.

まず図１には、本発明を実現する構成例を模式的に示す。本発明の充電制御装置は、制御装置１０、定電流源２０、温度計３０，４０などからなる。蓄電池には、シールバッテリ５０を用いる。充電制御手段に相当する制御装置１０は、ＣＰＵ（プロセッサ）１２、ＲＯＭ１４、ＲＡＭ１６、入出力回路などを備える。これらの要素や作動については後述する。充電器に相当する定電流源２０は、制御装置１０から出力された電流値を受けて、当該電流値に対応する充電電流Ｉを安定的に流してシールバッテリ５０の充電を行う。第１温度検出手段に相当する温度計３０は定電流源２０の温度を検出し、検出した温度値（充電器温度に相当する）を出力する。第２温度検出手段に相当する温度計４０はシールバッテリ５０の温度を検出し、検出した温度値（蓄電池温度に相当する）を出力する。   First, FIG. 1 schematically shows a configuration example for realizing the present invention. The charging control device of the present invention includes a control device 10, a constant current source 20, thermometers 30 and 40, and the like. A seal battery 50 is used as the storage battery. The control device 10 corresponding to the charging control means includes a CPU (processor) 12, a ROM 14, a RAM 16, an input / output circuit, and the like. These elements and operations will be described later. The constant current source 20 corresponding to the charger receives the current value output from the control device 10 and charges the seal battery 50 by stably flowing the charging current I corresponding to the current value. The thermometer 30 corresponding to the first temperature detecting means detects the temperature of the constant current source 20 and outputs the detected temperature value (corresponding to the charger temperature). The thermometer 40 corresponding to the second temperature detecting means detects the temperature of the seal battery 50 and outputs the detected temperature value (corresponding to the storage battery temperature).

制御装置１０の構成要素について説明する。ＲＯＭ１４には、充電制御プログラムや一定のデータ等を格納する。ＲＡＭ１６には、充電制御を行う際に必要なデータ（例えば温度値等）を一時的に記憶する。制御装置１０はＲＯＭ１４に記憶された充電制御プログラムをＣＰＵ１２が実行することにより、温度計３０，４０からそれぞれ出力された温度値を受けて、定電流源２０が流すべき充電電流Ｉの電流値を制御する。この制御例について、図２を参照しながら説明する。   The components of the control device 10 will be described. The ROM 14 stores a charge control program and certain data. The RAM 16 temporarily stores data (for example, a temperature value) necessary for charge control. When the CPU 12 executes the charge control program stored in the ROM 14, the control device 10 receives the temperature values output from the thermometers 30 and 40, and determines the current value of the charge current I that the constant current source 20 should flow. Control. An example of this control will be described with reference to FIG.

図２には、充電器温度θｂや充電電圧Ｖ等に基づいて充電電流Ｉを制御し、シールバッテリ５０の充電を行う過程をタイムチャートで表す。
制御装置１０は、時刻ｔ１０から電流値Ｉｓでシールバッテリ５０の充電を始めている。当該時刻ｔ１０の時点における充電電圧Ｖは電圧Ｖｓであり、充電器温度θｂは温度θｓ（通常は室温）である。充電によって定電流源２０は発熱量が増えるために充電器温度θｂが上昇し、充電開始からしばらく経った時刻ｔ１２には充電器温度θｂが上限温度θｍに達している。このとき制御装置１０は、充電電流Ｉを電流値Ｉｓよりも低く、かつ充電器温度θｂを上昇させない程度の電流値Ｉ１でシールバッテリ５０への充電を継続する。例えば電流値Ｉｓを８．４アンペアとしたときは、電流値Ｉ１を６アンペア（すなわち電流値Ｉｓの約７０％）とすれば、定電流源２０の発熱量はほぼ半分になる。こうして充電電流Ｉを低くすれば定電流源２０の発熱量も減るので、時刻ｔ１２からは充電器温度θｂが次第に低くなってゆく。 FIG. 2 is a time chart showing a process of charging the seal battery 50 by controlling the charging current I based on the charger temperature θb, the charging voltage V, and the like.
The control device 10 starts charging the seal battery 50 at the current value Is from time t10. The charging voltage V at time t10 is the voltage Vs, and the charger temperature θb is the temperature θs (usually room temperature). Due to the charging, the constant current source 20 increases the amount of heat generated, so that the charger temperature θb rises, and the charger temperature θb reaches the upper limit temperature θm at time t12 after a while from the start of charging. At this time, the control device 10 continues to charge the seal battery 50 with the current value I1 that is lower than the current value Is and does not increase the charger temperature θb. For example, when the current value Is is 8.4 amperes, if the current value I1 is 6 amperes (that is, about 70% of the current value Is), the amount of heat generated by the constant current source 20 is almost halved. If the charging current I is lowered in this way, the amount of heat generated by the constant current source 20 is also reduced. Therefore, the charger temperature θb gradually decreases from time t12.

電流値Ｉ１で充電を継続してゆくと充電電圧Ｖが上昇してゆき、時刻ｔ１４には基準電圧Ｖｃ（所定電圧に相当する）に達する。基準電圧Ｖｃは、温度計４０で計測した蓄電池温度θａに基づいて、次の数式１により求める。式中に示す係数Ｋａ，Ｋｂは、蓄電池の特性に応じて定められる。例えばシールバッテリ５０の場合では、係数Ｋａ＝１４．４を設定し、係数Ｋｂ＝０．０３を設定する。   When charging is continued at the current value I1, the charging voltage V increases and reaches the reference voltage Vc (corresponding to a predetermined voltage) at time t14. The reference voltage Vc is obtained by the following formula 1 based on the storage battery temperature θa measured by the thermometer 40. The coefficients Ka and Kb shown in the formula are determined according to the characteristics of the storage battery. For example, in the case of the sealed battery 50, the coefficient Ka = 14.4 is set and the coefficient Kb = 0.03 is set.

〔数式１〕
Ｖｃ＝Ｋａ＋Ｋｂ（θａ−２５） [Formula 1]
Vc = Ka + Kb (θa−25)

充電開始の時刻ｔ１２から時刻ｔ１４までの時間Ｔ１は、初段充電時間に相当する。こうして充電電圧Ｖが基準電圧Ｖｃに達した以降は段階的に電流値を下げ、シールバッテリ５０への充電を継続する。電流値を下げて充電を継続する段数や電流の低減量は、蓄電池の種類によって適切に定める。本例のシールバッテリ５０では、４段階に分けて行い、電流値を半分に低減する。   A time T1 from the charging start time t12 to time t14 corresponds to the first stage charging time. In this way, after the charging voltage V reaches the reference voltage Vc, the current value is lowered step by step and the charging of the seal battery 50 is continued. The number of stages to continue charging by lowering the current value and the amount of current reduction are appropriately determined according to the type of storage battery. In the sealed battery 50 of this example, the process is divided into four stages, and the current value is reduced to half.

すなわち制御装置１０は定電流源２０への指令により、時刻ｔ１４に電流値Ｉ１の半分の電流値Ｉ２にして充電を継続する。当該電流値Ｉ２で充電を継続してゆき、充電電圧Ｖが再び基準電圧Ｖｃに達した時刻ｔ１６には、電流値Ｉ２の半分の電流値Ｉ３で充電を継続する。当該電流値Ｉ３で充電を継続してゆき、さらに充電電圧Ｖが再び基準電圧Ｖｃに達した時刻ｔ１８には、電流値Ｉ３の半分の電流値Ｉ４で充電を継続する。２段目の時刻ｔ１４から時刻ｔ１６までの時間Ｔ２や、３段目の時刻ｔ１６から時刻ｔ１８までの時間Ｔ３、４段目の時刻ｔ１８から時刻ｔ２０までの時間Ｔ４は、同一の時間とは限らず、充電環境（電流値や周囲温度等）によって変化し得る。   That is, in response to a command to the constant current source 20, the control device 10 sets the current value I2 to half the current value I1 at time t14 and continues charging. Charging is continued at the current value I2, and at time t16 when the charging voltage V reaches the reference voltage Vc again, charging is continued at a current value I3 that is half of the current value I2. Charging is continued at the current value I3, and at time t18 when the charging voltage V reaches the reference voltage Vc again, charging is continued at a current value I4 that is half of the current value I3. Time T2 from time t14 in the second stage to time t16, time T3 from time t16 to time t18 in the third stage, and time T4 from time t18 to time t20 in the fourth stage are not necessarily the same time. However, it may vary depending on the charging environment (current value, ambient temperature, etc.).

そして、充電電圧Ｖが再び基準電圧Ｖｃに達した時刻ｔ２０には、制御装置１０は電流値Ｉ４の半分の電流値Ｉ５にし、時間Ｔ５（いわゆる押込み時間）だけシールバッテリ５０への充電を継続して過充電を行う。当該時間Ｔ５は適宜に設定できるが、例えば次に示す設定表のように蓄電池温度θａと時間Ｔ１との関係に基づいて設定する。   Then, at time t20 when the charging voltage V reaches the reference voltage Vc again, the control device 10 sets the current value I5 to half the current value I4 and continues charging the seal battery 50 for a time T5 (so-called pushing time). Overcharge. Although the said time T5 can be set suitably, it sets based on the relationship between storage battery temperature (theta) a and time T1 like the setting table shown next, for example.

〔設定表〕
┏━━━━━━━┯━━━━┳━━━━━┓
┃蓄電池温度θａ│時間Ｔ１┃時間Ｔ５ ┃
┣━━━━━━━┿━━━━╋━━━━━┫
┃ │３０分≧┃１．０時間┃
┃ ５℃＜ ├────╂─────┨
┃ │３０分＜┃２．５時間┃
┠───────┼────╂─────┨
┃ │３０分≧┃１．０時間┃
┃ ５℃≧ ├────╂─────┨
┃ │３０分＜┃４．０時間┃
┗━━━━━━━┷━━━━┻━━━━━┛ [Setting table]
┏━━━━━━━┯━━━━┳━━━━━┓
┃Storage battery temperature θa│Time T1┃Time T5 ┃
┣━━━━━━━┿━━━━╋━━━━━┫
│ 30 minutes ≧ ┃ 1.0 hour ┃
℃ 5 ℃ <├────╂─────┨
│ │30 minutes <┃2.5 hours┃
┠───────┼────╂─────┨
│ 30 minutes ≧ ┃ 1.0 hour ┃
℃ 5 ℃ ≧ ├────╂─────┨
│ 30 minutes <┃ 4.0 hours ┃
┗━━━━━━━┷━━━━┻━━━━━┛

ここで、定電流源２０の設置例について図３を参照しながら説明する。図３に示す例では、定電流源２０を車両下部のフレーム６０にネジ等で固定する。固定された定電流源２０は外観上隠蔽するためにボディやカバー等で覆われるため、当該定電流源２０の内部で発生した熱を逃がしにくい環境となる場合が多い。このような場合でも、上述したように定電流源２０の充電器温度θｂが上限温度θｍに達した後は、これ以上は充電器温度θｂが上昇しないような電流値に低くして充電を継続するので、充電器温度θｂを低下させて安定した充電を行うことが可能になる。   Here, an installation example of the constant current source 20 will be described with reference to FIG. In the example shown in FIG. 3, the constant current source 20 is fixed to the frame 60 under the vehicle with screws or the like. Since the fixed constant current source 20 is covered with a body, a cover or the like so as to be concealed in appearance, it often becomes an environment where it is difficult to release heat generated inside the constant current source 20. Even in such a case, after the charger temperature θb of the constant current source 20 reaches the upper limit temperature θm as described above, the charging is continued by lowering the current value so that the charger temperature θb does not increase any more. Therefore, it is possible to perform stable charging by reducing the charger temperature θb.

上述した実施例によれば、制御装置１０はシールバッテリ５０の充電を始めた後に温度計３０によって検出した充電器温度θｂが上限温度θｍに達すると、電流値Ｉ１（第１電流値に相当する）よりも低い電流値Ｉ２（第２電流値に相当する）で充電を継続する制御を行なった｛図２を参照｝。この制御によれば、充電器温度θｂが上限温度θｍに達した後は低下するか、最悪の場合でも上限温度θｍを維持するにとどまる。従来技術のように充電電流Ｉをカットしないので、充電時間を従来よりも短縮できる。また、充電電流Ｉのオン／オフを繰り返すことがないので、急激な電流値の変化に伴うノイズ等の発生を防止することができる。   According to the above-described embodiment, when the controller 10 starts charging the seal battery 50 and the charger temperature θb detected by the thermometer 30 reaches the upper limit temperature θm, the current value I1 (corresponding to the first current value). ) To continue charging at a current value I2 (corresponding to the second current value) lower than {) (see FIG. 2). According to this control, after the charger temperature θb reaches the upper limit temperature θm, the battery temperature decreases, or the upper limit temperature θm is maintained even in the worst case. Since the charging current I is not cut as in the prior art, the charging time can be shortened compared to the prior art. Further, since the charging current I is not repeatedly turned on / off, it is possible to prevent the occurrence of noise or the like accompanying a sudden change in the current value.

以上、本発明を実施するための最良の形態について実施例に従って説明したが、本発明は当該実施例に何ら限定されるものではない。言い換えれば、本発明の要旨を逸脱しない範囲内において、種々なる形態で実施することが可能である。例えば、次に示す各形態を実現してもよい。   As mentioned above, although the best form for implementing this invention was demonstrated according to the Example, this invention is not limited to the said Example at all. In other words, the present invention can be implemented in various forms without departing from the gist of the present invention. For example, the following forms may be realized.

（１）上述した実施例では、電動車等に用いられる完全密閉型のシールバッテリ５０を適用した｛図１等を参照｝。この形態に代えて、シールバッテリ５０以外の蓄電池（例えば鉛蓄電池，アルカリ蓄電池，ニッケル・カドミウム蓄電池等）にも適用することが可能である。こうした蓄電池であっても、従来技術のように充電電流Ｉをカットしないので、充電時間を従来よりも短縮できる。 (1) In the above-described embodiment, a completely sealed type seal battery 50 used for an electric vehicle or the like is applied {see FIG. 1 and the like}. It can replace with this form and can also apply to storage batteries (for example, lead storage battery, alkaline storage battery, nickel cadmium storage battery, etc.) other than seal battery 50. Even in such a storage battery, the charging current I is not cut as in the prior art, so that the charging time can be shortened compared to the conventional case.

（２）上述した実施例では、ＣＰＵ１２等を有する制御装置１０によって定電流源２０を制御する構成とした｛図１等を参照｝。この形態に代えて、抵抗，コンデンサ，オペアンプ等の素子を用いた電子回路によって定電流源２０を制御する構成としてもよい。例えば温度や電圧等を基準値と比較するべく差分回路を用い、当該差分回路から出力される差分値を入力したオペアンプが定電流源２０に電流値に相当する信号を出力すればよい。さらには、制御装置１０に相当する電子回路と、定電流源２０とを一体化した装置を構成してもよい。これらの装置ではプログラムが不要となるので、製造コストを低減できる。 (2) In the above-described embodiment, the constant current source 20 is controlled by the control device 10 having the CPU 12 or the like {see FIG. 1 and the like}. Instead of this form, the constant current source 20 may be controlled by an electronic circuit using elements such as a resistor, a capacitor, and an operational amplifier. For example, a difference circuit may be used to compare temperature, voltage, and the like with a reference value, and an operational amplifier that receives the difference value output from the difference circuit may output a signal corresponding to the current value to the constant current source 20. Furthermore, an apparatus in which an electronic circuit corresponding to the control device 10 and the constant current source 20 are integrated may be configured. Since these apparatuses do not require a program, manufacturing costs can be reduced.

本発明を実現する構成例を模式的に示す図である。It is a figure which shows typically the structural example which implement | achieves this invention. 充電器温度や充電電圧等に基づいて充電電流を制御する過程を説明するためのタイムチャートである。It is a time chart for demonstrating the process which controls charging current based on charger temperature, charging voltage, etc. FIG. 定電流源の設置例を示す図である。It is a figure which shows the example of installation of a constant current source.

符号の説明Explanation of symbols

１０ 制御装置（充電制御手段）
１２ ＣＰＵ
１４ ＲＯＭ（記憶部）
１６ ＲＡＭ（記憶部）
２０ 定電流源（充電器）
３０ 温度計（第１温度検出手段）
４０ 温度計（第２温度検出手段）
５０ シールバッテリ（蓄電池）
６０ フレーム
Ｉ 充電電流
Ｖ 充電電圧
Ｖｃ 基準電圧
θｂ 充電器温度
θｍ 上限温度
10 Control device (charging control means)
12 CPU
14 ROM (storage unit)
16 RAM (storage unit)
20 Constant current source (charger)
30 thermometer (first temperature detection means)
40 Thermometer (second temperature detection means)
50 Seal battery
60 frame I charging current V charging voltage Vc reference voltage θb charger temperature θm upper limit temperature

Claims (1)

充電器により蓄電池を充電する制御を行う蓄電池の充電制御装置であって、
前記充電器の温度を検出する第１温度検出手段と、
第１電流値で前記蓄電池の充電を始めた後に、前記第１温度検出手段によって検出した温度が上限温度に達すると、前記第１電流値よりも低くかつ前記充電器の温度を上昇させない第２電流値で前記蓄電池の充電を継続する制御を行う充電制御手段とを有する蓄電池の充電制御装置。
A storage battery charge control device that performs control of charging a storage battery with a charger,
First temperature detecting means for detecting the temperature of the charger;
When the temperature detected by the first temperature detecting means reaches the upper limit temperature after starting the charging of the storage battery at the first current value, the second temperature is lower than the first current value and does not increase the temperature of the charger. A storage battery charge control device comprising charge control means for performing control to continue charging of the storage battery with a current value.
JP2003335730A 2003-09-26 2003-09-26 Device for controlling charging of storage battery Pending JP2005102453A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008141907A (en) * 2006-12-05 2008-06-19 Matsushita Electric Ind Co Ltd Charging device with temperature protection feature
CN100438264C (en) * 2005-07-05 2008-11-26 株式会社理光 A charging circuit and a semiconductor device including the same
JP2009165329A (en) * 2008-01-10 2009-07-23 Yamaha Motor Electronics Co Ltd Rapid charging method and charger used therein
JP2010130756A (en) * 2008-11-26 2010-06-10 Toyota Motor Corp Vehicle charging system
JP2010172158A (en) * 2009-01-26 2010-08-05 Ricoh Co Ltd Charging device for secondary battery
JP2012227983A (en) * 2011-04-15 2012-11-15 Konica Minolta Medical & Graphic Inc Charging system, electronic device and charging device
JP2013198372A (en) * 2012-03-22 2013-09-30 Mitsubishi Motors Corp Charging control device for electric automobile

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100438264C (en) * 2005-07-05 2008-11-26 株式会社理光 A charging circuit and a semiconductor device including the same
JP2008141907A (en) * 2006-12-05 2008-06-19 Matsushita Electric Ind Co Ltd Charging device with temperature protection feature
JP2009165329A (en) * 2008-01-10 2009-07-23 Yamaha Motor Electronics Co Ltd Rapid charging method and charger used therein
JP2010130756A (en) * 2008-11-26 2010-06-10 Toyota Motor Corp Vehicle charging system
US8058848B2 (en) 2008-11-26 2011-11-15 Toyota Jidosha Kabushiki Kaisha Vehicle charging system
JP2010172158A (en) * 2009-01-26 2010-08-05 Ricoh Co Ltd Charging device for secondary battery
JP2012227983A (en) * 2011-04-15 2012-11-15 Konica Minolta Medical & Graphic Inc Charging system, electronic device and charging device
JP2013198372A (en) * 2012-03-22 2013-09-30 Mitsubishi Motors Corp Charging control device for electric automobile

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