JPH07107619A - Auxiliary battery charger for electric automobile - Google Patents
Auxiliary battery charger for electric automobileInfo
- Publication number
- JPH07107619A JPH07107619A JP5242591A JP24259193A JPH07107619A JP H07107619 A JPH07107619 A JP H07107619A JP 5242591 A JP5242591 A JP 5242591A JP 24259193 A JP24259193 A JP 24259193A JP H07107619 A JPH07107619 A JP H07107619A
- Authority
- JP
- Japan
- Prior art keywords
- auxiliary battery
- voltage
- battery
- temperature
- auxiliary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
-
- 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
- Y02T10/72—Electric energy management in electromobility
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気自動車の前照灯、
ワイパ等の車両補機類を作動させるための、補機バッテ
リを充電する装置に関する。BACKGROUND OF THE INVENTION The present invention relates to an electric vehicle headlight,
The present invention relates to a device for charging an auxiliary battery for operating vehicle accessories such as a wiper.
【０００２】[0002]
【従来の技術】一般的に、電気自動車のバッテリは、走
行用の駆動力を得る主バッテリと、この主バッテリとは
別に車両補機類（例えば前照灯、ワイパ等）を作動させ
得る補機バッテリとが搭載されている。この補機バッテ
リは、主バッテリからの電圧を直流−直流コンバータを
介して変圧することにより充電されるものである。2. Description of the Related Art Generally, a battery of an electric vehicle is a main battery that obtains a driving force for traveling, and an auxiliary device that can operate vehicle accessories such as a headlight and a wiper separately from the main battery. The machine battery and. This auxiliary battery is charged by transforming the voltage from the main battery through a DC-DC converter.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述し
た従来技術においては、主バッテリから補機バッテリへ
の充電過程における、直流−直流コンバータの出力電圧
は一定値であるのに対し、補機バッテリの推奨充電電圧
はバッテリの温度と共に可変（高温時は低電圧，低温時
は高電圧）するものであり、補機バッテリの温度が高温
時には過充電に、また低温時には充電不足になるという
問題点があった。However, in the above-mentioned prior art, while the output voltage of the DC-DC converter is a constant value during the charging process from the main battery to the auxiliary battery, the output voltage of the auxiliary battery is The recommended charging voltage varies with the temperature of the battery (low voltage at high temperature, high voltage at low temperature), which causes overcharge when the temperature of the auxiliary battery is high and insufficient charging at low temperature. there were.
【０００４】そこで本発明は、補機バッテリの温度変化
に伴い発生する、過充電（高温時）および充電不足（低
温時）を解消する電気自動車用補機バッテリ装置を提供
することを目的とするものである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an auxiliary battery device for an electric vehicle that eliminates overcharging (at high temperature) and insufficient charging (at low temperature) that occur with changes in the temperature of the auxiliary battery. It is a thing.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記の課題を
解決するための手段として、走行用駆動力を得る主バッ
テリと、車両補機類を作動させる補機バッテリと、前記
主バッテリの電圧を前記補機バッテリへ充電させる電圧
変換手段と、前記補機バッテリの温度変化を検出する温
度検出手段とを備え、該温度検出手段の出力信号を前記
電圧変換手段へ入力し、前記電圧変換手段の出力電圧を
可変させ、前記補機バッテリの充電電圧を前記温度変化
に応じた所定値に設定させることを特徴とする電気自動
車用補機バッテリ充電装置を提供する。As a means for solving the above problems, the present invention provides a main battery for obtaining a driving force for traveling, an auxiliary battery for operating vehicle accessories, and a main battery for the main battery. A voltage conversion means for charging the auxiliary battery with a voltage; and a temperature detection means for detecting a temperature change of the auxiliary battery. An output signal of the temperature detection means is input to the voltage conversion means to convert the voltage. There is provided an auxiliary battery charging device for an electric vehicle, wherein the output voltage of the means is varied to set the charging voltage of the auxiliary battery to a predetermined value according to the temperature change.
【０００６】[0006]
【作用】本発明によれば、補機バッテリの温度変化を温
度検出手段により検出し、この信号に基づき電圧変換手
段の出力電圧を可変させることにより、補機バッテリの
充電電圧を温度変化に応じた所定値に設定させる。According to the present invention, the temperature change of the auxiliary battery is detected by the temperature detecting means, and the output voltage of the voltage converting means is varied based on this signal, so that the charging voltage of the auxiliary battery is changed according to the temperature change. Set to a specified value.
【０００７】[0007]
【実施例】次に本発明の、電気自動車用補機バッテリ充
電装置を、図に示す一実施例に基づき説明する。 〔第１実施例〕図１は本発明の第１実施例を示すもので
あり、電気自動車用補機バッテリ充電装置の回路構成図
を示したものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an auxiliary battery charging device for an electric vehicle of the present invention will be described based on an embodiment shown in the drawings. [First Embodiment] FIG. 1 shows a first embodiment of the present invention, which is a circuit configuration diagram of an auxiliary battery charging device for an electric vehicle.
【０００８】図１において、電気自動車用補機バッテリ
充電装置は、走行用の駆動力を得る主バッテリ３１と、
車両補機類を作動させる補機バッテリ３２と、前記主バ
ッテリ３１の電圧を降下させ前記補機バッテリ３２を充
電させる電圧変換手段をなす直流−直流コンバータ１
と、温度検出手段をなすサーミスタ９とからなり、主バ
ッテリ３１からの電圧を直流−直流コンバータ１を介し
て補機バッテリ３２へ供給するよう構成されている。In FIG. 1, an auxiliary battery charging device for an electric vehicle includes a main battery 31 for obtaining driving power for traveling,
A DC-DC converter 1 that forms a voltage conversion unit that drops the voltage of the main battery 31 to charge the auxiliary battery 32 and the auxiliary battery 32 that operates vehicle accessories.
And a thermistor 9 serving as a temperature detecting means, and is configured to supply the voltage from the main battery 31 to the auxiliary battery 32 via the DC-DC converter 1.
【０００９】サーミスタ９は、補機バッテリ３２の温度
変化を検出できるように補機バッテリ３２の側面ないし
底面等に付設され、このサーミスタ９の一接続端は補機
バッテリ３２の正極端子に接続され、また他接続端は直
流−直流コンバータ１へと入力するよう配設されてい
る。そして、直流−直流コンバータ１は、主バッテリ３
１から補機バッテリ３２へ充電される電圧を変圧させる
トランス２と、このトランス２の１次側１１の入力を制
御するトランジスタ５と、トランス２の２次側１２から
の出力を整流する整流回路１０と、補機バッテリ３２の
温度情報に基づきトランジスタ５への印加電圧を制御す
る制御回路７と、制御回路７を駆動させる補助電源８と
からなる。The thermistor 9 is attached to the side surface or the bottom surface of the auxiliary battery 32 so as to detect the temperature change of the auxiliary battery 32, and one connection end of the thermistor 9 is connected to the positive terminal of the auxiliary battery 32. The other connection end is arranged to input to the DC-DC converter 1. Then, the DC-DC converter 1 includes the main battery 3
1, a transformer 2 that transforms the voltage charged from 1 to the auxiliary battery 32, a transistor 5 that controls the input of the primary side 11 of the transformer 2, and a rectifying circuit that rectifies the output from the secondary side 12 of the transformer 2. 10, a control circuit 7 that controls the voltage applied to the transistor 5 based on the temperature information of the auxiliary battery 32, and an auxiliary power supply 8 that drives the control circuit 7.
【００１０】そして、トランス２の１次側１１の一端
は、主バッテリ３１の正極端子に接続され、他端はトラ
ンジスタ５のコレクタ側に接続されている。このトラン
ジスタ５のエミッタ側は主バッテリ３１の負極端子に接
続され、ベース側は抵抗６を介して制御回路７の端子Ｔ
3 に接続されている。さらに、補助電源８は制御回路７
の端子Ｔ4 とＴ5 とに接続され、主バッテリ３１からの
電流を受けて制御回路７を作動させるよう構成されてい
る。One end of the primary side 11 of the transformer 2 is connected to the positive terminal of the main battery 31, and the other end is connected to the collector side of the transistor 5. The emitter side of this transistor 5 is connected to the negative terminal of the main battery 31, and the base side is connected via the resistor 6 to the terminal T of the control circuit 7.
Connected to 3 . Further, the auxiliary power source 8 is the control circuit 7
Is connected to the terminals T 4 and T 5 of the main battery 31 and is configured to operate the control circuit 7 by receiving a current from the main battery 31.
【００１１】一方、トランス２の２次側には、ダイオー
ド１３，１４、リアクトル１５およびコンデンサ１６か
らなる整流回路１０が配設され、この整流回路を介し
て、補機バッテリ３２および前照灯、ワイパ等の車両補
機類の負荷が接続されている。そして、補機バッテリ３
２の負極端子は、制御回路７の端子Ｔ2 に、またサーミ
スタ９は制御回路７の端子Ｔ1 に接続されている。On the other hand, on the secondary side of the transformer 2, a rectifying circuit 10 composed of diodes 13, 14, a reactor 15 and a capacitor 16 is disposed, and via this rectifying circuit, an auxiliary battery 32 and a headlight, A load of vehicle accessories such as a wiper is connected. And the auxiliary battery 3
The negative terminal of 2 is connected to the terminal T 2 of the control circuit 7, and the thermistor 9 is connected to the terminal T 1 of the control circuit 7.
【００１２】次に、図２は制御回路７の回路構成を示す
ものであり、制御回路７は、分圧抵抗７４，７５，７
６，７７と、比較器７１と、帰還増幅器７２と、三角波
発振器とからなる。この制御回路７の端子Ｔ1 とＴ2 と
を接続する分圧抵抗７６，７７の中間点は、帰還増幅器
７２の非反転入力へと接続されており、また端子Ｔ4 と
Ｔ5 とを接続する分圧抵抗７４，７５の中間点は、帰還
増幅器７２の反転入力へと接続されている。Next, FIG. 2 shows a circuit configuration of the control circuit 7. The control circuit 7 includes voltage dividing resistors 74, 75 and 7.
6, 77, a comparator 71, a feedback amplifier 72, and a triangular wave oscillator. The midpoint of the voltage dividing resistors 76 and 77 connecting the terminals T 1 and T 2 of the control circuit 7 is connected to the non-inverting input of the feedback amplifier 72, and the terminals T 4 and T 5 are connected. The intermediate point of the voltage dividing resistors 74 and 75 is connected to the inverting input of the feedback amplifier 72.
【００１３】そして、帰還増幅器７２の出力は、比較器
７１の反転入力へと接続されるとともに、比較器７１の
非反転入力へは、三角波発振器７３の出力が接続されて
おり、さらに、この比較器７１の出力は、端子Ｔ3 へと
接続される構成となっている。次に、上記構成における
第１実施例の作用について以下説明する。The output of the feedback amplifier 72 is connected to the inverting input of the comparator 71, and the output of the triangular wave oscillator 73 is connected to the non-inverting input of the comparator 71. The output of the container 71 is connected to the terminal T 3 . Next, the operation of the first embodiment having the above configuration will be described below.
【００１４】前照灯やワイパ等の車両補機類の使用にと
もない（すなわちスイッチ１７が閉じられた場合）、補
機バッテリ３２の端子間電圧ＶSBが低下すると、この端
子間電圧ＶSBはサーミスタ９を介して制御回路７のＴ1
端子に入力され、サーミスタ９と抵抗７６，７７により
分圧され、電圧ＶS を発生することになる。この分圧に
ともない発生する電圧ＶS は、サーミスタ９の温度特性
に大きく依存するものであり、このサーミスタ９は、低
温になるに従い抵抗値が大きくなる特性のものを用いて
いる。[0014] With the use of vehicle accessories such as headlights or a wiper (i.e., the switch 17 is closed), the terminal voltage V SB of the auxiliary battery 32 is lowered, the terminal voltage V SB is T 1 of the control circuit 7 via the thermistor 9
The voltage is input to the terminal and divided by the thermistor 9 and the resistors 76 and 77 to generate the voltage V S. The voltage V S generated due to this partial pressure largely depends on the temperature characteristic of the thermistor 9, and the thermistor 9 has a characteristic that the resistance value increases as the temperature decreases.
【００１５】そして、この電圧ＶS は、帰還増幅器７２
において基準電圧ＶREF と比較されることになる。さら
に、比較器７１において、帰還増幅器７２の出力と、三
角波発振器７３からの入力信号との関係から、デューテ
ィ比を求め、このデューティ比に基づいたパルス信号が
Ｔ3 端子よりトランジスタ５のベース側へ出力されるこ
とになる。This voltage V S is fed back to the feedback amplifier 72.
At the reference voltage V REF . Further, in the comparator 71, the duty ratio is obtained from the relationship between the output of the feedback amplifier 72 and the input signal from the triangular wave oscillator 73, and the pulse signal based on this duty ratio is transferred from the T 3 terminal to the base side of the transistor 5. Will be output.
【００１６】そして、このパルス信号のトランジスタ５
のベース側への印加により、トランス２の１次側１１で
の電圧を可変させ、その結果トランス２の２次側１２の
出力電圧を可変させることになり、補機バッテリ３２の
端子間電圧が、サーミスタ９の温度特性に応じた所定電
圧に保持されることになる。例えば、補機バッテリ３２
が低温時（−３０℃程度）には、サーミスタ９の抵抗値
が大きくなり、分圧にともない発生する電圧ＶS は低下
することになり、基準電圧ＶREF よりも低い電圧とな
り、帰還増幅器７１の出力が低下することになる。これ
にともない比較器７１の反転入力の電位は低下し、この
反転入力と、非反転入力と接続されている三角波発振器
７３との関係からデューティ比の高いパルス信号がＴ3
端子よりトランジスタ５のベース側へ出力されることに
なる。そして、このデューティ比の高いパルス信号のト
ランジスタ５のベース側への印加により、トランス２の
１次側１１での電圧が高くなり、その結果トランス２の
２次側１２の出力電圧を増加させることになり、補機バ
ッテリ３２の端子間電圧が上昇し、所定値に収束するこ
とになる。この端子間電圧は、例えば鉛バッテリを用い
た場合に、常温時（２０℃程度）で１４．４Ｖであるの
に対し、低温時は１５Ｖ程度の値をとるものである。The transistor 5 for this pulse signal
Is applied to the base side of the transformer 2 to change the voltage on the primary side 11 of the transformer 2, and as a result, the output voltage of the secondary side 12 of the transformer 2 is changed. , A predetermined voltage corresponding to the temperature characteristic of the thermistor 9 is held. For example, the auxiliary battery 32
When the temperature is low (about −30 ° C.), the resistance value of the thermistor 9 increases, and the voltage V S generated due to the voltage division decreases, which becomes a voltage lower than the reference voltage V REF and the feedback amplifier 71 Output will decrease. Along with this, the potential of the inverting input of the comparator 71 decreases, and a pulse signal with a high duty ratio is T 3 due to the relationship between the inverting input and the triangular wave oscillator 73 connected to the non-inverting input.
It is output from the terminal to the base side of the transistor 5. By applying the pulse signal having the high duty ratio to the base side of the transistor 5, the voltage on the primary side 11 of the transformer 2 becomes high, and as a result, the output voltage of the secondary side 12 of the transformer 2 is increased. Then, the voltage between the terminals of the auxiliary battery 32 rises and converges to a predetermined value. This inter-terminal voltage is, for example, 14.4 V at room temperature (about 20 ° C.) when a lead battery is used, whereas it has a value of about 15 V at low temperature.
【００１７】一方、補機バッテリが高温時（８０℃程
度）には、サーミスタ９の抵抗値が小さくなり、分圧に
ともない発生する電圧Ｖｓは上昇することになり、基準
電圧Ｖ REF よりも高い電圧となり、帰還増幅器７１の出
力が上昇することになる。これにともない比較器７２の
反転入力の電位は上昇し、この反転入力と、非反転入力
と接続されている三角波発振器７３との関係からデュー
ティ比の低いパルス信号がＴ3 端子よりトランジスタ５
のベース側へ出力されることになる。On the other hand, when the auxiliary battery is hot (about 80 ° C.)
Degree), the resistance value of the thermistor 9 becomes smaller,
As a result, the generated voltage Vs will rise,
Voltage V REFHigher voltage than that of the feedback amplifier 71
Power will rise. With this, the comparator 72
The potential of the inverting input rises, and this inverting input and the non-inverting input
Due to the relationship with the triangular wave oscillator 73 connected to
A pulse signal with a low T ratio is T3Transistor 5 from the terminal
Will be output to the base side of.
【００１８】そして、このデューティ比の低いパルス信
号のトランジスタ５のベース側への印加により、トラン
ス２の１次側１１での電圧が低くなり、その結果トラン
ス２の２次側１２の出力電圧を減少させることになり、
補機バッテリ３２の端子間電圧が減少し、所定値に収束
することになる。この端子間電圧は、例えば鉛バッテリ
を用いた場合に、常温時（２０℃程度）で１４．４Ｖで
あるのに対し、高温時は１３．６Ｖ程度の値をとるもの
である。By applying the pulse signal having the low duty ratio to the base side of the transistor 5, the voltage on the primary side 11 of the transformer 2 is lowered, and as a result, the output voltage of the secondary side 12 of the transformer 2 is reduced. Will decrease
The voltage between the terminals of the auxiliary battery 32 decreases, and the auxiliary battery 32 converges to a predetermined value. For example, when a lead battery is used, this terminal voltage is 14.4 V at room temperature (about 20 ° C.), while it has a value of about 13.6 V at high temperature.
【００１９】つまり、電圧変換手段１の補機バッテリ３
２への出力電圧は、サーミスタの温度特性に応じた抵抗
値に基づいて制御され、端子間電圧ＶSBを補機バッテリ
の温度に応じた所定値に保持することが可能となる。次
に、上記構成における第１実施例の効果について以下説
明する。図３は、補機バッテリと充電電圧との関係を示
す線図であり、実線は補機バッテリ（鉛バッテリの場
合）の推奨充電電圧を、一点鎖線は従来の充電電圧を、
破線は本第１実施例の充電電圧を示すものである。That is, the auxiliary battery 3 of the voltage converting means 1
The output voltage to 2 is controlled based on the resistance value according to the temperature characteristic of the thermistor, and the inter-terminal voltage V SB can be maintained at a predetermined value according to the temperature of the auxiliary battery. Next, the effect of the first embodiment having the above configuration will be described below. FIG. 3 is a diagram showing the relationship between the auxiliary battery and the charging voltage. The solid line indicates the recommended charging voltage of the auxiliary battery (in the case of a lead battery), and the alternate long and short dash line indicates the conventional charging voltage.
The broken line shows the charging voltage of the first embodiment.
【００２０】この線図からわかるように、本第１実施例
によれば、補機バッテリの推奨充電電圧に沿った充電制
御をサーミスタの温度特性を利用して行うことが可能と
なり、補機バッテリが高温時の過充電や、低温時の充電
不足を解消することができる。 〔第２実施例〕次に、図４は本発明の第２実施例を示す
ものであり、電気自動車用補機バッテリ充電装置の回路
構成図を示したものである。As can be seen from this diagram, according to the first embodiment, it becomes possible to perform charge control along the recommended charging voltage of the auxiliary battery by utilizing the temperature characteristic of the thermistor, and the auxiliary battery Can eliminate overcharge at high temperature and insufficient charge at low temperature. Second Embodiment Next, FIG. 4 shows a second embodiment of the present invention, which is a circuit configuration diagram of an auxiliary battery charging device for an electric vehicle.
【００２１】第１実施例では、サーミスタ９を、補機バ
ッテリ３２の正極端子と、制御回路７の端子Ｔ1 との間
に接続するようにしたものであるが、本第２実施例にお
いては、制御回路７に新たに端子Ｔ6 を設け、サーミス
タ９の一接続端をこの端子Ｔ 6 に、また他接続端は整流
回路１０と補機バッテリ３２との間に接続される構成と
なっている。In the first embodiment, the thermistor 9 is used as an auxiliary device bar.
Positive terminal of battery 32 and terminal T of control circuit 71Between
Although it is designed to be connected to the
In addition, a new terminal T is added to the control circuit 7.6Set up, thermis
Connect one end of the 6And the other connection end is rectified
A structure connected between the circuit 10 and the auxiliary battery 32
Has become.
【００２２】また、制御回路７は、図５に示す通り、端
子Ｔ4 とＴ6 とを接続する分圧抵抗７６，７７の中間点
が帰還増幅器７２の反転入力へ接続される構成となって
いる。尚、その他の構成については、第１実施例と同様
である。上述した構成にすることにより、上述した第１
実施例とは反対に、補機バッテリ３２の温度変化を検出
し、サーミスタ９の抵抗値変化により、基準電圧ＶREF
を可変することができる。Further, as shown in FIG. 5, the control circuit 7 has a structure in which the intermediate point between the voltage dividing resistors 76 and 77 connecting the terminals T 4 and T 6 is connected to the inverting input of the feedback amplifier 72. There is. The rest of the configuration is similar to that of the first embodiment. With the above-described configuration, the above-described first
Contrary to the embodiment, the reference voltage V REF is detected by detecting the temperature change of the auxiliary battery 32 and changing the resistance value of the thermistor 9.
Can be changed.
【００２３】尚本第２実施例の効果については、第１実
施例と同様の効果を得ることができる。また、直流−直
流コンバータ１はフォワード方式による構成を示した
が、これに限られるものではなく、例えばフルブリッジ
方式等を用いてもよい。さらに、補機バッテリの温度
は、バッテリ液の液温そのものを検出してもよい。Regarding the effects of the second embodiment, the same effects as those of the first embodiment can be obtained. Further, although the DC-DC converter 1 has been shown to have the forward type configuration, the present invention is not limited to this, and a full bridge type or the like may be used. Further, as the temperature of the auxiliary battery, the liquid temperature itself of the battery liquid may be detected.
【００２４】[0024]
【発明の効果】本発明によれば、補機バッテリの温度変
化を温度検出手段により検出し、この信号に基づき電圧
変換手段の出力電圧を可変させることにより、補機バッ
テリの充電電圧を温度変化に応じた所定値に設定させる
ことができ、補機バッテリの温度変化に伴い発生する、
過充電（高温時）および充電不足（低温時）を解消する
ことができる。According to the present invention, the temperature change of the auxiliary battery is detected by the temperature detecting means, and the output voltage of the voltage converting means is varied based on this signal to change the charging voltage of the auxiliary battery with temperature. Can be set to a predetermined value depending on the temperature of the auxiliary battery,
Overcharge (at high temperature) and insufficient charge (at low temperature) can be resolved.
【図１】本発明の第１実施例を示す回路構成図。FIG. 1 is a circuit configuration diagram showing a first embodiment of the present invention.
【図２】本発明の第１実施例における制御回路の回路構
成図。FIG. 2 is a circuit configuration diagram of a control circuit in the first embodiment of the present invention.
【図３】補機バッテリの温度と充電電圧の関係を示す線
図。FIG. 3 is a diagram showing a relationship between a temperature of an auxiliary battery and a charging voltage.
【図４】本発明の第２実施例を示す回路構成図。FIG. 4 is a circuit configuration diagram showing a second embodiment of the present invention.
【図５】本発明の第２実施例における制御回路の回路構
成図。FIG. 5 is a circuit configuration diagram of a control circuit according to a second embodiment of the present invention.
１・・・電圧変換手段をなす直流−直流コンバータ ４・・・負荷 ９・・・温度検出手段をなすサーミスタ ３１・・・主バッテリ ３２・・・補機バッテリ DESCRIPTION OF SYMBOLS 1 ... DC-DC converter forming voltage converting means 4 ... Load 9 ... Thermistor forming temperature detecting means 31 ... Main battery 32 ... Auxiliary battery
Claims (3)
補機類を作動させる補機バッテリと、前記主バッテリの
電圧を前記補機バッテリへ充電させる電圧変換手段と、
前記補機バッテリの温度変化を検出する温度検出手段と
を備え、 該温度検出手段の出力信号を前記電圧変換手段へ入力
し、前記電圧変換手段の出力電圧を可変させ、前記補機
バッテリの充電電圧を前記温度変化に応じた所定値に設
定させることを特徴とする電気自動車用補機バッテリ充
電装置。1. A main battery that obtains a driving force for traveling, an auxiliary battery that operates vehicle accessories, and a voltage conversion unit that charges the voltage of the main battery to the auxiliary battery.
A temperature detecting means for detecting a temperature change of the auxiliary battery, inputting an output signal of the temperature detecting means to the voltage converting means, varying an output voltage of the voltage converting means, and charging the auxiliary battery. An auxiliary battery charging device for an electric vehicle, wherein a voltage is set to a predetermined value according to the temperature change.
であることを特徴とする請求項１記載の電気自動車用補
機バッテリ充電装置2. The auxiliary battery charging device for an electric vehicle according to claim 1, wherein the voltage converting means is a DC-DC transformer.
の温度変化を抵抗値変化に変換するサーミスタであるこ
とを特徴とする請求項１記載の電気自動車用補機バッテ
リ充電装置3. The auxiliary battery charging device for an electric vehicle according to claim 1, wherein the temperature detecting means is a thermistor for converting a temperature change of the auxiliary battery into a resistance value change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5242591A JPH07107619A (en) | 1993-09-29 | 1993-09-29 | Auxiliary battery charger for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5242591A JPH07107619A (en) | 1993-09-29 | 1993-09-29 | Auxiliary battery charger for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07107619A true JPH07107619A (en) | 1995-04-21 |
Family
ID=17091334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5242591A Pending JPH07107619A (en) | 1993-09-29 | 1993-09-29 | Auxiliary battery charger for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07107619A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998005110A1 (en) * | 1996-07-25 | 1998-02-05 | Northrop Grumman Corporation | Auxiliary battery voltage/temperature compensation for automotive 12 volt system for electric vehicles |
| EP1081838A2 (en) * | 1999-08-31 | 2001-03-07 | Fujitsu Limited | Power control method and circuit, and power supply unit |
| JP2004320877A (en) * | 2003-04-15 | 2004-11-11 | Toyota Motor Corp | Power device for drive unit and automobile equipped with the same, and control method of power device |
| JP2006314025A (en) * | 2005-05-09 | 2006-11-16 | Sony Corp | Imaging apparatus and power supply method for the same |
| JP2008086060A (en) * | 2006-09-26 | 2008-04-10 | Nissan Motor Co Ltd | Charge controller of battery for vehicle |
| JP2010004638A (en) * | 2008-06-19 | 2010-01-07 | Honda Motor Co Ltd | Fuel cell vehicle |
| JP2011166982A (en) * | 2010-02-12 | 2011-08-25 | Nichicon Corp | Converter |
| WO2012164798A1 (en) * | 2011-05-27 | 2012-12-06 | パナソニック株式会社 | Power supply apparatus and charging apparatus for electric vehicle |
| US8928272B2 (en) | 2009-12-04 | 2015-01-06 | Hyundai Motor Company | Method for controlling charging voltage of 12V auxiliary battery for hybrid vehicle |
| US9180785B2 (en) | 2013-04-11 | 2015-11-10 | Hyundai Motor Company | System and method of controlling low-voltage DC/DC converter for electric vehicle |
| KR20180045311A (en) * | 2016-10-25 | 2018-05-04 | 현대자동차주식회사 | Method and apparatus for charging auxiliary battery of vehicle including driving motor |
-
1993
- 1993-09-29 JP JP5242591A patent/JPH07107619A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998005110A1 (en) * | 1996-07-25 | 1998-02-05 | Northrop Grumman Corporation | Auxiliary battery voltage/temperature compensation for automotive 12 volt system for electric vehicles |
| EP1081838A2 (en) * | 1999-08-31 | 2001-03-07 | Fujitsu Limited | Power control method and circuit, and power supply unit |
| EP1081838A3 (en) * | 1999-08-31 | 2001-03-21 | Fujitsu Limited | Power control method and circuit, and power supply unit |
| US6366475B2 (en) | 1999-08-31 | 2002-04-02 | Fujitsu Limited | Power control method and circuit, and power supply unit |
| JP2004320877A (en) * | 2003-04-15 | 2004-11-11 | Toyota Motor Corp | Power device for drive unit and automobile equipped with the same, and control method of power device |
| JP2006314025A (en) * | 2005-05-09 | 2006-11-16 | Sony Corp | Imaging apparatus and power supply method for the same |
| JP4702243B2 (en) * | 2006-09-26 | 2011-06-15 | 日産自動車株式会社 | Charge control device for vehicle battery |
| JP2008086060A (en) * | 2006-09-26 | 2008-04-10 | Nissan Motor Co Ltd | Charge controller of battery for vehicle |
| JP2010004638A (en) * | 2008-06-19 | 2010-01-07 | Honda Motor Co Ltd | Fuel cell vehicle |
| US8928272B2 (en) | 2009-12-04 | 2015-01-06 | Hyundai Motor Company | Method for controlling charging voltage of 12V auxiliary battery for hybrid vehicle |
| US10611256B2 (en) | 2009-12-04 | 2020-04-07 | Hyundai Motor Company | Method for controlling charging voltage of 12V auxiliary battery for hybrid vehicle |
| US10906408B2 (en) | 2009-12-04 | 2021-02-02 | Hyundai Motor Company | Method for controlling charging voltage of 12V auxiliary battery for hybrid vehicle |
| JP2011166982A (en) * | 2010-02-12 | 2011-08-25 | Nichicon Corp | Converter |
| WO2012164798A1 (en) * | 2011-05-27 | 2012-12-06 | パナソニック株式会社 | Power supply apparatus and charging apparatus for electric vehicle |
| US9180785B2 (en) | 2013-04-11 | 2015-11-10 | Hyundai Motor Company | System and method of controlling low-voltage DC/DC converter for electric vehicle |
| KR20180045311A (en) * | 2016-10-25 | 2018-05-04 | 현대자동차주식회사 | Method and apparatus for charging auxiliary battery of vehicle including driving motor |
| US10434896B2 (en) | 2016-10-25 | 2019-10-08 | Hyundai Motor Company | Method and apparatus for charging auxiliary battery of vehicle including driving motor |
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