JPH1155871A - Battery charger for motor vehicle - Google Patents

Battery charger for motor vehicle

Info

Publication number
JPH1155871A
JPH1155871A JP9223039A JP22303997A JPH1155871A JP H1155871 A JPH1155871 A JP H1155871A JP 9223039 A JP9223039 A JP 9223039A JP 22303997 A JP22303997 A JP 22303997A JP H1155871 A JPH1155871 A JP H1155871A
Authority
JP
Japan
Prior art keywords
solar cell
battery
charging
solar
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP9223039A
Other languages
Japanese (ja)
Inventor
Takeshi Watanabe
武 渡辺
Kazuyoshi Furuhashi
一能 古橋
Takahiro Chiku
孝弘 知久
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.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
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 Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP9223039A priority Critical patent/JPH1155871A/en
Publication of JPH1155871A publication Critical patent/JPH1155871A/en
Withdrawn legal-status Critical Current

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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Abstract

PROBLEM TO BE SOLVED: To control the charging current depending on the charged state of a battery by providing more than one solar cell arrays of different output voltage comprising a plurality of solar cells connected in series, connecting a rectifier at least with a solar cell array having a low output voltage and then connecting these solar cell arrays in parallel when a specified battery is charged. SOLUTION: The charger comprises more than one solar cell arrays 3a, 3b of different output voltage comprising a plurality of solar cells A connected in series and a rectifier 2 is connected at least with a solar cell array 3a having a low output voltage. The solar cell arrays 3a, 3b are then connected in parallel before being connected with a specified battery. When a charging current I is supplied and the voltage of a battery 5 reaches the maximum output voltage level of the solar cell array 3a, the charging current I is supplied only from the solar cell array 3b. When the maximum output voltage level of the solar cell array 3b is reached, the charging current I goes zero. According to the arrangement, the battery 5 can be protected against overcharge.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電動車用電池の充
電装置に係り、特に複数の太陽電池が接続された太陽電
池列を用いた電動車用電池の充電装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charger for an electric vehicle, and more particularly, to a battery charger for an electric vehicle using a solar cell array to which a plurality of solar cells are connected.

【０００２】[0002]

【従来の技術】従来より、電動車用電池の充電をする装
置としては、種々のものが提案されている。例えば、電
池を短時間で充電する方法として、通常の商用電源を用
いた定電流充電方式がある。これは、一定の電流を長時
間流す充電方式であり、大きな電流を流して充電をする
ほど、充電のための必要時間は短くなる。2. Description of the Related Art Conventionally, various devices have been proposed for charging an electric vehicle battery. For example, as a method of charging a battery in a short time, there is a constant current charging method using a normal commercial power supply. This is a charging method in which a constant current flows for a long time, and the time required for charging is reduced as the charging is performed by flowing a large current.

【０００３】また、上記した商用電源を用いる場合の
他、太陽電池を用いた充電装置も提案されている。太陽
電池は、太陽の光を電力に変換するものであり、この太
陽電池を直列接続して太陽電池列とすることにより所定
の電圧を得ることができる。[0003] In addition to the above-described case of using a commercial power supply, a charging device using a solar cell has been proposed. A solar cell converts solar light into electric power, and a predetermined voltage can be obtained by connecting the solar cells in series to form a solar cell array.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、上記従
来例には以下のような不都合があった。即ち、定電流充
電方式によって長時間にわたって充電を行う場合には、
充電の終期には入力された電気エネルギが水の電気分解
や熱の発生のために消費されてしまう。また、電池内に
ガスが発生し、また、いわゆる過充電によって電池の変
形や電池の劣化を引き起こす、という不都合を生じてい
た。However, the above conventional example has the following disadvantages. That is, when charging is performed for a long time by the constant current charging method,
At the end of charging, the input electric energy is consumed for electrolysis of water and generation of heat. In addition, gas is generated in the battery, and the battery is deformed and the battery is deteriorated by so-called overcharging.

【０００５】また、太陽電池を用いた充電装置であって
も、電池に入力される電流の大きさは、太陽電池の配列
によって特定されるものであり、何らの工夫をしない場
合には、過充電を避けることは困難であった。[0005] Further, even in a charging device using a solar cell, the magnitude of the current input to the battery is specified by the arrangement of the solar cells. It was difficult to avoid charging.

【０００６】更に、充電を行う場合には、充電の終期以
前までは大電流を流し、充電の終期以降には、入力する
電流を小さくする等の制御が必要である。しかしなが
ら、このように電流の制御を行うためには、所定の制御
回路のほか、電池の電圧を検出するセンサ等が必要とな
って、装置全体が複雑化する、という不都合を生じてい
た。Further, when performing charging, it is necessary to control such that a large current flows before the end of charging, and to reduce the input current after the end of charging. However, in order to control the current in this way, in addition to a predetermined control circuit, a sensor for detecting the voltage of the battery and the like are required, and there has been an inconvenience that the entire apparatus becomes complicated.

【０００７】[0007]

【発明の目的】本発明は、かかる従来例の有する不都合
を改善し、特に、簡易な構造で電池の充電状態に応じた
電流の制御をすることができる電動車用電池の充電装置
を提供することを、その目的とする。SUMMARY OF THE INVENTION The object of the present invention is to provide a battery charger for an electric vehicle which can solve the disadvantages of the prior art and can control the current in accordance with the state of charge of the battery with a simple structure. That is its purpose.

【０００８】[0008]

【課題を解決するための手段】上記した目的を達成する
ために、請求項１記載の発明では、複数の太陽電池が直
列接続され出力電圧が相互に異なる太陽電池列を少なく
とも２列備えると共に、これら各太陽電池列のうち少な
くとも出力電圧の低い太陽電池列に所定の整流器を接続
し、これら各太陽電池列を並列接続すると共に、前記各
太陽電池列の電極を所定の電池に接続する、という構成
を採っている。In order to achieve the above object, according to the first aspect of the present invention, a plurality of solar cells are connected in series, and at least two solar cell arrays having different output voltages are provided. A predetermined rectifier is connected to at least a solar cell array having a low output voltage among these solar cell arrays, and the respective solar cell arrays are connected in parallel, and the electrodes of the respective solar cell arrays are connected to a predetermined battery. It has a configuration.

【０００９】以上のように構成されたことで、電池の充
電が開始された初期状態では、各太陽電池列から電流が
供給される。このため、最大電流が電池に供給される。
そして、充電が進んで電池の電圧が上昇した場合には、
特定の太陽電池列の最大電圧に近づき、その太陽電池列
からは電流が流れなくなる。従って、残りの太陽電池列
からのみ電流が供給され、結果として電池に供給される
電流が減少する。[0009] With the above configuration, in the initial state where charging of the battery is started, current is supplied from each solar cell array. Therefore, the maximum current is supplied to the battery.
And, when charging progresses and the voltage of the battery rises,
When the voltage approaches the maximum voltage of a specific solar cell string, current stops flowing from that solar cell string. Therefore, current is supplied only from the remaining solar cell rows, and as a result, the current supplied to the battery is reduced.

【００１０】[0010]

【発明の実施の形態】本発明の一実施形態を図面に基づ
いて説明する。本実施形態にかかる電動車用電池の充電
装置では、図１に示すように、複数の太陽電池Ａが直列
接続され出力電圧が相互に異なる太陽電池列３ａ，３ｂ
を少なくとも２列備えると共に、これら各太陽電池列３
ａ，３ｂのうち少なくとも出力電圧の低い太陽電池列３
ａに所定の整流器（例えばダイオード）２が接続されて
いる。また、これら各太陽電池列３ａ，３ｂは並列接続
されると共に、各太陽電池列３ａ，３ｂの電極が所定の
電池に接続される。以下詳細に説明する。An embodiment of the present invention will be described with reference to the drawings. In the battery charger for an electric vehicle according to the present embodiment, as shown in FIG. 1, a plurality of solar cells A are connected in series and the output voltages of the solar cell arrays 3a and 3b are different from each other.
And at least two rows, and each of these solar cell rows 3
a, 3b, at least a solar cell array 3 having a low output voltage
A predetermined rectifier (for example, a diode) 2 is connected to a. The solar cell arrays 3a and 3b are connected in parallel, and the electrodes of the solar cell arrays 3a and 3b are connected to predetermined cells. This will be described in detail below.

【００１１】図１に示す電動車用電池の充電装置１で
は、６枚の太陽電池Ａが直列接続された太陽電池列３ａ
と、７枚の太陽電池Ａが直列接続された太陽電池列３ｂ
とが相互に並列接続されている。また、６枚の太陽電池
Ａが直列接続された太陽電池列３ａは、本実施形態では
３列接続されている。ここで用いられている太陽電池Ａ
は、全て同じ特性を有するものである。各太陽電池列３
ａ，３ｂの正極側の端部には、所定のダイオード２が接
続されている。このダイオード２は、後述するように、
電池５側の電圧が大きくなった場合に、太陽電池列３ａ
への電流の逆流を防止するためのものである。尚、図１
においては、太陽電池列３ｂにもダイオード２を接続し
ているが、これは必ずしも必要なものではない。また、
ダイオード２の接続位置も、太陽電池列３ａ，３ｂの端
部に限らず、逆の電極側でもよいし、各太陽電池Ａの途
中でもよい。In the electric vehicle battery charger 1 shown in FIG. 1, a solar cell array 3a in which six solar cells A are connected in series.
And a solar cell array 3b in which seven solar cells A are connected in series
And are connected in parallel with each other. Further, in the present embodiment, three solar cell columns 3a in which six solar cells A are connected in series are connected. Solar cell A used here
Have the same characteristics. Each solar cell row 3
A predetermined diode 2 is connected to the positive ends of the terminals a and 3b. This diode 2 is, as described later,
When the voltage on the battery 5 side increases, the solar cell array 3a
This is to prevent the current from flowing back to the device. FIG.
In the above, the diode 2 is also connected to the solar cell column 3b, but this is not always necessary. Also,
The connection position of the diode 2 is not limited to the ends of the solar cell arrays 3a and 3b, but may be on the opposite electrode side or in the middle of each solar cell A.

【００１２】各太陽電池列３ａ，３ｂは、上記したよう
に、相互に並列接続され、正極及び負極が電池５の正極
及び負極にそれぞれ接続されている。電池５は公称電圧
が１２０Ｖのものを用いている。As described above, the solar cell arrays 3a and 3b are connected in parallel with each other, and the positive and negative electrodes are connected to the positive and negative electrodes of the battery 5, respectively. The battery 5 has a nominal voltage of 120V.

【００１３】次に、上記のように構成された電動車用電
池の充電装置１の動作及び機能について説明する。ここ
で、各太陽電池Ａによって生じる最大電圧をＶA0とし、
各太陽電池列３ａ，３ｂによって出力される最大電流を
それぞれＩA0とする。全ての太陽電池Ａに充分な照度の
光が照射された場合には、各太陽電池列３ａ，３ｂから
は最大電流ＩA0が出力される。そして、このとき、電池
５に供給される充電電流Ｉは、太陽電池列３ａ，３ｂが
全部で４列装備されているので、 Ｉ＝４・ＩA0 となる（図２（ｂ）参照）。従って、電池の電圧Ｖは、
充電電流Ｉの供給に対応して徐々に上昇する（図２
（ａ）参照）。Next, the operation and functions of the battery charger 1 for an electric vehicle configured as described above will be described. Here, the maximum voltage generated by each solar cell A is V A0 ,
The maximum current output by each of the solar cell arrays 3a and 3b is defined as IA0 . When all the solar cells A are irradiated with light of sufficient illuminance, the maximum current IA0 is output from each of the solar cell arrays 3a and 3b. Then, at this time, the charging current I supplied to the battery 5 is I = 4 · I A0 because the solar cell arrays 3a and 3b are all provided in four rows (see FIG. 2B). Therefore, the voltage V of the battery is
It gradually increases in response to the supply of the charging current I (see FIG. 2).
(A)).

【００１４】充電電流Ｉの供給に伴って、電池の電圧Ｖ
は６ＶA0まで上昇する。これは、太陽電池列３ａには最
大出力電圧がＶA0である太陽電池Ａが６枚直列接続され
ているからである。そして、電池５の電圧が６枚の太陽
電池Ａを備えた太陽電池列３ａの出力電圧の最大値であ
る６・ＶA0（＝１４４Ｖ）以上となると、太陽電池列３
ａからは充電電流Ｉが出力されなくなる。このため、電
池５に供給される充電電流Ｉは、７枚の太陽電池Ａを備
えた太陽電池列３ｂからのみとなり、４・ＩA0からＩA0
へと減少する（図２（ｂ）参照）。従って、電池５の電
圧の上昇割合も減少する（図２（ａ）参照）。ここで、
電池５の電圧が６・ＶA0（＝１４４Ｖ）を超えた場合で
も、電流は各太陽電池列３ａに逆流しない。これは、各
太陽電池列３ａにはダイオード２が接続されているから
である。When the charging current I is supplied, the battery voltage V
Rises to 6V A0 . This is because six solar cells A whose maximum output voltage is VA0 are connected in series to the solar cell column 3a. When the voltage of the battery 5 becomes equal to or higher than 6 · V A0 (= 144 V), which is the maximum value of the output voltage of the solar cell array 3a including the six solar cells A, the solar cell array 3
The charging current I is not output from a. For this reason, the charging current I supplied to the battery 5 is only from the solar cell row 3b including the seven solar cells A, and from 4 · I A0 to I A0
(See FIG. 2B). Therefore, the rate of increase in the voltage of the battery 5 also decreases (see FIG. 2A). here,
Even when the voltage of the battery 5 exceeds 6 · V A0 (= 144 V), the current does not flow back to each solar cell row 3a. This is because the diode 2 is connected to each solar cell column 3a.

【００１５】電池５の電圧Ｖが、７枚の太陽電池Ａを備
えた太陽電池列３ｂの最大出力電圧７・ＶA0（＝１６８
Ｖ）以上となった場合には、当該太陽電池列３ｂからも
充電電流が出力されなくなる。従って、充電の初期にお
いては４・ＩA0（＝１２Ａ）流れていた充電電流Ｉは、
充電終期には、ＩA0（＝３Ａ）に抑えられ、最後は電流
が流れなくなる。このように、相互に枚数の異なる太陽
電池Ａを直列接続した太陽電池列３ａ，３ｂを用い、こ
れらの太陽電池列３ａ，３ｂを並列接続することによ
り、電池５の電圧の上昇に伴って電池５に供給される電
流値が自動的に減少する。このことは、なんら複雑な制
御系を装備することなく、電池５に対する過充電を防止
することができることを意味する。When the voltage V of the battery 5 is equal to the maximum output voltage 7 · V A0 (= 168) of the solar cell array 3b having seven solar cells A.
V) or more, no charging current is output from the solar cell column 3b. Therefore, the charging current I flowing at 4 · I A0 (= 12 A) at the beginning of charging is
At the end of charging, the current is suppressed to I A0 (= 3 A), and no current flows at the end. As described above, by using the solar cell arrays 3a and 3b in which the numbers of solar cells A different from each other are connected in series, and connecting the solar cell arrays 3a and 3b in parallel, the battery 5 5 automatically decreases. This means that overcharging of the battery 5 can be prevented without providing any complicated control system.

【００１６】次に、他の実施形態について図面を参照し
て説明する。図３に示すように、当該実施形態にかかる
電動車用電池の充電装置２１では、それぞれ枚数の異な
る太陽電池Ａが直列接続された太陽電池列２３ａ，２３
ｂ，２３ｃが３種類用いられる。具体的には、５枚の太
陽電池Ａが直列接続された太陽電池列２３ａが２列と、
６枚の太陽電池Ａが直列接続された太陽電池列２３ｂが
１列と、７枚の太陽電池Ａが直列接続された太陽電池列
２３ｃが１列設けられている。そして、これら各太陽電
池列２３ａ，２３ｂ，２３ｃが相互に並列接続されてい
る。また、各太陽電池列２３ａ，２３ｂ，２３ｃの端部
にダイオード２が接続されているのは、上記した実施形
態と同様である。Next, another embodiment will be described with reference to the drawings. As shown in FIG. 3, in the electric vehicle battery charger 21 according to the present embodiment, solar cell arrays 23a and 23 in which different numbers of solar cells A are connected in series.
b and 23c are used. Specifically, there are two solar cell rows 23a in which five solar cells A are connected in series,
One solar cell row 23b in which six solar cells A are connected in series and one solar cell row 23c in which seven solar cells A are connected in series are provided. These solar cell arrays 23a, 23b, and 23c are connected to each other in parallel. Further, the diode 2 is connected to the end of each of the solar cell rows 23a, 23b, 23c as in the above-described embodiment.

【００１７】以上のように構成された電動車用電池の充
電装置２１の動作、機能を説明すると、充電の初期段階
では、電池５に供給される充電電流Ｉは、 Ｉ＝４・ＩA0 となる（図４（ｂ）参照）。従って、電池５の電圧Ｖ
は、充電電流の供給に対応して徐々に上昇する（図４
（ａ）参照）。The operation and function of the electric vehicle battery charger 21 constructed as described above will be described. In the initial stage of charging, the charging current I supplied to the battery 5 is I = 4 · IA0 . (See FIG. 4B). Therefore, the voltage V of the battery 5
Gradually rises in response to the supply of the charging current (FIG. 4).
(A)).

【００１８】充電電流Ｉの供給に伴って、電池５の電圧
Ｖは５・ＶA0まで上昇する。これは、太陽電池列２３ａ
には最大出力電圧がＶA0である太陽電池が５枚直列接続
されているからである。そして、電池５の電圧が５枚の
太陽電池Ａを備えた太陽電池列２３ａの出力電圧の最大
値である５・ＶA0（＝１２０Ｖ）以上となると、太陽電
池列２３ａからは電流が出力されなくなる。このため、
電池５に供給される充電電流Ｉは、６枚の太陽電池Ａを
備えた太陽電池列２３ｂと、７枚の太陽電池Ａを備えた
太陽電池列２３ｃからのみとなり、充電電流Ｉも４・Ｉ
A0から２・ＩA0へと減少する（図４（ｂ）参照）。従っ
て、電池５の電圧Ｖの上昇割合も減少する（図４（ａ）
参照）。With the supply of the charging current I, the voltage V of the battery 5 increases to 5 · V A0 . This is the solar cell row 23a
This is because five solar cells whose maximum output voltage is VA0 are connected in series. When the voltage of the battery 5 becomes equal to or higher than the maximum value of the output voltage of the solar cell array 23a including the five solar cells A, ie, 5 · V A0 (= 120V), a current is output from the solar cell array 23a. Disappears. For this reason,
The charging current I supplied to the battery 5 is only from the solar cell array 23b having six solar cells A and the solar cell array 23c having seven solar cells A, and the charging current I is also 4 · I.
It decreases from A0 to 2 · I A0 (see FIG. 4B). Therefore, the rate of increase of the voltage V of the battery 5 also decreases (FIG. 4A).
reference).

【００１９】電池５の電圧Ｖが、６枚の太陽電池Ａを備
えた太陽電池列２３ｂの最大出力電圧６・ＶA0（＝１４
４Ｖ）以上となった場合には、当該太陽電池列２３ｂか
らも充電電流Ｉが出力されなくなる。そして、電池５に
供給される充電電流Ｉは、７枚の太陽電池Ａを備えた太
陽電池列２３ｃからのみとなり、充電電流Ｉも２・Ｉ A0
からＩA0（＝３Ａ）へと減少する。（図４（ｂ）参
照）。従って、電池５の電圧Ｖの上昇割合も更に減少す
る（図４（ａ）参照）。The voltage V of the battery 5 has six solar cells A.
The maximum output voltage of the solar cell array 23b, 6 VA0(= 14
4V) or more, the solar cell column 23b
Also, the charging current I is not output. And to the battery 5
The supplied charging current I is a thick current having seven solar cells A.
Only from the positive battery row 23c, the charging current I is 2 · I A0
To IA0(= 3A). (See FIG. 4 (b)
See). Therefore, the rate of increase of the voltage V of the battery 5 is further reduced.
(See FIG. 4A).

【００２０】このように、相互に枚数の異なる太陽電池
Ａを直列接続した太陽電池列２３ａ，２３ｂ，２３ｃを
３種類用い、これらの太陽電池列２３ａ，２３ｂ，２３
ｃを並列接続することにより、電池５の電圧Ｖの上昇に
伴って電池５に供給される電流値が自動的に減少する。
即ち、３種類の太陽電池列２３ａ，２３ｂ，２３ｃを用
いることで、充電電流Ｉの大きさを３段階に減少させる
ことができる。最終的に、電池５の電圧が７・ＶA0（＝
１６８Ｖ）以上となった場合には、充電電流Ｉが流れな
くなる。As described above, three types of solar cell arrays 23a, 23b, and 23c in which different numbers of solar cells A are connected in series are used, and these solar cell arrays 23a, 23b, and 23c are used.
By connecting c in parallel, the current value supplied to the battery 5 automatically decreases as the voltage V of the battery 5 increases.
That is, by using three types of solar cell arrays 23a, 23b, and 23c, the magnitude of the charging current I can be reduced in three stages. Finally, the voltage of the battery 5 becomes 7 · V A0 (=
168 V) or more, the charging current I stops flowing.

【００２１】次に、更に他の実施形態について図面を参
照して説明する。図５に示すように、当該実施形態にか
かる電動車用電池の充電装置３１では、それぞれ特性の
異なる太陽電池Ａ，Ｂが直列接続された太陽電池列３１
ａ，３１ｂ，３１ｃが用いられている。即ち、太陽電池
Ｂが８枚直列接続された太陽電池列３１ａと、太陽電池
Ａが６枚直列接続された太陽電池列３１ｂと、更に太陽
電池Ａが７枚直列接続された太陽電池列３１ｃが装備さ
れている。また、太陽電池Ｂを用いた太陽電池列３３ａ
は２列装備されている。そして、これら各太陽電池列３
１ａ，３１ｂ，３１ｃが相互に並列接続されている。Next, still another embodiment will be described with reference to the drawings. As shown in FIG. 5, in the electric vehicle battery charging apparatus 31 according to the present embodiment, a solar cell array 31 in which solar cells A and B having different characteristics are connected in series.
a, 31b and 31c are used. That is, a solar cell row 31a in which eight solar cells B are connected in series, a solar cell row 31b in which six solar cells A are connected in series, and a solar cell row 31c in which seven solar cells A are connected in series. Equipped. Also, a solar cell array 33a using the solar cell B
Is equipped with two rows. And each of these solar cell arrays 3
1a, 31b and 31c are mutually connected in parallel.

【００２２】太陽電池Ｂの最大出力電圧ＶB0は、約１７
Ｖ程度であり、これに対して、太陽電池Ａの最大出力電
圧ＶA0は、約２４Ｖ程度である。従って、太陽電池Ｂを
８枚直列接続した場合の最大出力電圧は、太陽電池Ａを
６枚直列接続した場合の最大出力電圧より小さい。ま
た、各太陽電池列３１ａ，３１ｂ，３１ｃの端部にダイ
オード２が接続されているのは、上記した実施形態と同
様である。The maximum output voltage V B0 of the solar cell B is about 17
V, whereas the maximum output voltage VA0 of the solar cell A is about 24V. Therefore, the maximum output voltage when eight solar cells B are connected in series is smaller than the maximum output voltage when six solar cells A are connected in series. Further, the diode 2 is connected to the end of each of the solar cell arrays 31a, 31b, 31c as in the above-described embodiment.

【００２３】以上のように構成された電動車用電池の充
電装置３１の動作、機能を説明すると、充電の初期段階
では、電池５に供給される充電電流Ｉは、 Ｉ＝２・ＩA0＋２・ＩB0 となる（図６（ｂ）参照）。ここで、ＩB0は、太陽電池
Ｂが直列接続された太陽電池列３３ａの出力する最大電
流値である。従って、電池５の電圧Ｖは、充電電流Ｉの
供給に対応して徐々に上昇する（図６（ａ）参照）。The operation and function of the electric vehicle battery charger 31 constructed as described above will be described. In the initial stage of charging, the charging current I supplied to the battery 5 is I = 2 · I A0 +2. • I B0 (see FIG. 6B). Here, IB0 is the maximum current value output from the solar cell array 33a in which the solar cells B are connected in series. Therefore, the voltage V of the battery 5 gradually increases in response to the supply of the charging current I (see FIG. 6A).

【００２４】充電電流Ｉの供給に伴って、先ず、電池５
の電圧Ｖは８ＶB0（＝１３６Ｖ）まで上昇する。これは
上記したように、太陽電池列３３ａには最大出力電圧が
ＶB0である太陽電池が８枚直列接続されており、この電
圧値ＶB0は、太陽電池Ａを６枚直列接続した場合の最大
出力電圧よりも小さいからである。そして、電池５の電
圧Ｖが８ＶB0を超えると、太陽電池列３３ａからは充電
電流Ｉが出力されなくなる。従って、電池５に供給され
る充電電流Ｉは減少する。具体的には、電流を出力する
のは、太陽電池Ａからなる太陽電池列３３ｂ，３３ｃだ
けになるので、供給される電流値は２・ＩA0となる（図
６（ｂ）参照）。With the supply of the charging current I, first, the battery 5
Rises to 8V B0 (= 136V). This is because, as described above, eight solar cells having a maximum output voltage of V B0 are connected in series to the solar cell array 33a, and this voltage value V B0 is obtained when six solar cells A are connected in series. This is because it is smaller than the maximum output voltage. Then, when the voltage V of the battery 5 exceeds 8V B0 , the charging current I is not output from the solar cell array 33a. Therefore, the charging current I supplied to the battery 5 decreases. Specifically, since only the solar cell rows 33b and 33c including the solar cell A output current, the supplied current value is 2 · IA0 (see FIG. 6B).

【００２５】そして、太陽電池列３１ｂ，３１ｃから充
電電流Ｉが供給されて、電池５の電圧Ｖが太陽電池Ａを
６枚備えた太陽電池列３３ｂの出力電圧の最大値である
６・ＶA0（＝１４４Ｖ）以上となると、太陽電池列３３
ｂからも充電電流Ｉが出力されなくなる。このため、電
池５に供給される充電電流Ｉは、７枚の太陽電池Ａを備
えた太陽電池列３３ｃからのみとなり、充電電流Ｉも２
・ＩA0からＩA0へと減少する（図６（ｂ）参照）。従っ
て、電池５の電圧Ｖの上昇割合も減少する（図６（ａ）
参照）。Then, the charging current I is supplied from the solar cell arrays 31b and 31c, and the voltage V of the battery 5 is 6 · V A0 which is the maximum value of the output voltage of the solar cell array 33b having six solar cells A. (= 144V) or more, the solar cell array 33
The charging current I is no longer output from b. For this reason, the charging current I supplied to the battery 5 is only from the solar cell row 33c including the seven solar cells A, and the charging current I is 2
-It decreases from I A0 to I A0 (see FIG. 6B). Therefore, the rate of increase of the voltage V of the battery 5 also decreases (FIG. 6A).
reference).

【００２６】更に、太陽電池列３３ｃからの充電電流Ｉ
の供給によって電池５の電圧Ｖが上昇すると、最終的に
７枚の太陽電池Ａを備えた太陽電池列３３ｃの最大出力
電圧になり、この太陽電池列３３ｃからも充電電流Ｉが
供給されなくなる。このように、相互に特性の異なる太
陽電池Ａ，Ｂを直列接続した太陽電池列３１ａ，３１
ｂ，３１ｃを３種類用い、これらの太陽電池列３１ａ，
３１ｂ，３１ｃを並列接続することにより、電池５の電
圧Ｖの上昇に伴って電池５に供給される充電電流Ｉの値
の制御を自由に設定することが可能となる。即ち、３種
類の太陽電池列３１ａ，３１ｂ，３１ｃを用いること
で、充電電流Ｉの大きさを３段階に減少させることがで
きる。Further, the charging current I from the solar cell column 33c
When the voltage V of the battery 5 is increased by the supply of the solar cell A, the voltage finally reaches the maximum output voltage of the solar cell array 33c including the seven solar cells A, and the charging current I is not supplied from the solar cell array 33c. As described above, solar cell arrays 31a and 31 in which solar cells A and B having different characteristics are connected in series.
b, 31c, these solar cell arrays 31a,
By connecting the batteries 31b and 31c in parallel, it becomes possible to freely set the control of the value of the charging current I supplied to the battery 5 as the voltage V of the battery 5 increases. That is, by using the three types of solar cell arrays 31a, 31b, and 31c, the magnitude of the charging current I can be reduced in three stages.

【００２７】尚、以上に説明した太陽電池列の組み合わ
せ及び各太陽電池列の太陽電池の個数は一例である。即
ち、太陽電池の数や配列方法は、充電の対象となる電池
の特性を基に決定されるべきものである。従って、例え
ば１枚ずつ太陽電池の数が増加していく太陽電池列を並
列接続したり、同じ枚数の太陽電池を備えた太陽電池列
を２組ずつ装備したりすることも可能である。The combination of the solar cell rows described above and the number of solar cells in each solar cell row are merely examples. That is, the number and arrangement method of the solar cells should be determined based on the characteristics of the battery to be charged. Therefore, for example, it is possible to connect solar cell arrays in which the number of solar cells increases one by one in parallel, or to equip two sets of solar cell arrays each having the same number of solar cells.

【００２８】[0028]

【発明の効果】以上説明したように、本発明の電動車用
電池の充電装置は、複数の太陽電池が直列接続された太
陽電池列を少なくとも２列備えると共に、これら各太陽
電池列の端部に所定のダイオードを接続し、各太陽電池
列を相互に異なる枚数の太陽電池で構成すると共に、こ
れら各太陽電池列を並列接続し、各太陽電池列の電極を
所定の電池に接続した。このため、各太陽電池列からの
電流の供給に伴って電池の電圧が上昇することにより、
徐々に太陽電池列からの電流供給が停止する。この結
果、充電の進展に伴って電流値自動的に抑制され、いわ
ゆる過充電が有効に防止される、という優れた効果を生
じる。As described above, the battery charging device for an electric vehicle according to the present invention includes at least two solar cell rows in which a plurality of solar cells are connected in series, and an end portion of each of these solar cell rows. , A predetermined diode was connected to each of the solar cell arrays, and each of the solar cell arrays was composed of a different number of solar cells. The respective solar cell arrays were connected in parallel, and the electrodes of each of the solar cell arrays were connected to a predetermined battery. For this reason, the voltage of the battery rises with the supply of current from each solar cell row,
The current supply from the solar cell array is gradually stopped. As a result, there is an excellent effect that the current value is automatically suppressed with the progress of charging, and so-called overcharging is effectively prevented.

【００２９】また、本発明では太陽電池とダイオードと
の組み合わせだけの簡易な構成で目的を達成できるの
で、電動車用電池の充電装置を安価に構成することがで
きる、という優れた効果を生じる。Further, in the present invention, since the object can be achieved with a simple configuration consisting only of a combination of a solar cell and a diode, an excellent effect that an inexpensive battery charger for an electric vehicle can be constructed can be obtained.

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

【図１】本発明の第１の実施形態を示すブロック図であ
る。FIG. 1 is a block diagram showing a first embodiment of the present invention.

【図２】図１に開示した充電装置での充電状態を示す図
であり、図２（ａ）は充電時間と電池電圧の関係を示
し、図２（ｂ）は充電時間と充電電流の関係を示す。FIGS. 2A and 2B are diagrams showing a charging state in the charging device disclosed in FIG. 1, wherein FIG. 2A shows a relationship between charging time and battery voltage, and FIG. 2B shows a relationship between charging time and charging current. Is shown.

【図３】本発明の第２の実施形態を示すブロック図であ
る。FIG. 3 is a block diagram showing a second embodiment of the present invention.

【図４】図３に開示した充電装置での充電状態を示す図
であり、図４（ａ）は充電時間と電池電圧の関係を示
し、図４（ｂ）は充電時間と充電電流の関係を示す。4A and 4B are diagrams showing a state of charge in the charging device disclosed in FIG. 3; FIG. 4A shows a relationship between a charging time and a battery voltage; and FIG. 4B shows a relationship between a charging time and a charging current. Is shown.

【図５】本発明の第３の実施形態を示すブロック図であ
る。FIG. 5 is a block diagram showing a third embodiment of the present invention.

【図６】図５に開示した充電装置での充電状態を示す図
であり、図６（ａ）は充電時間と電池電圧の関係を示
し、図６（ｂ）は充電時間と充電電流の関係を示す。6 is a diagram showing a state of charge in the charging device disclosed in FIG. 5; FIG. 6 (a) shows a relationship between charging time and battery voltage; FIG. 6 (b) shows a relationship between charging time and charging current; Is shown.

【符号の説明】[Explanation of symbols]

１ 電動車用電池の充電装置 ２ 整流器（ダイオード） ３ａ，３ｂ 太陽電池列 ５ 電池 ２１ 電動車用電池の充電装置 ２３ａ，２３ｂ，２３ｃ 太陽電池列 ３１ 電動車用電池の充電装置 ３３ａ，３３ｂ，３３ｃ 太陽電池列 DESCRIPTION OF SYMBOLS 1 Electric vehicle battery charging device 2 Rectifier (diode) 3a, 3b Solar cell string 5 Battery 21 Electric vehicle battery charging device 23a, 23b, 23c Solar cell string 31 Electric vehicle battery charging device 33a, 33b, 33c Solar array

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 複数の太陽電池が直列接続され出力電圧
が相互に異なる太陽電池列を少なくとも２列備えると共
に、これら各太陽電池列のうち少なくとも出力電圧の低
い太陽電池列に所定の整流器を接続し、 これら各太陽電池列を並列接続すると共に、前記各太陽
電池列の電極を所定の電池に接続したことを特徴とする
電動車用電池の充電装置。A plurality of solar cells are connected in series and have at least two solar cell arrays having mutually different output voltages, and a predetermined rectifier is connected to at least a solar cell array having a low output voltage among these solar cell arrays. A battery charger for an electric vehicle battery, wherein the solar cell arrays are connected in parallel, and the electrodes of the solar cell arrays are connected to a predetermined battery.
JP9223039A 1997-08-05 1997-08-05 Battery charger for motor vehicle Withdrawn JPH1155871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9223039A JPH1155871A (en) 1997-08-05 1997-08-05 Battery charger for motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9223039A JPH1155871A (en) 1997-08-05 1997-08-05 Battery charger for motor vehicle

Publications (1)

Publication Number Publication Date
JPH1155871A true JPH1155871A (en) 1999-02-26

Family

ID=16791893

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9223039A Withdrawn JPH1155871A (en) 1997-08-05 1997-08-05 Battery charger for motor vehicle

Country Status (1)

Country Link
JP (1) JPH1155871A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005046198A1 (en) * 2003-11-07 2005-05-19 Cherokee Europe Sa Method and apparatus for remote powering using multiple subscriber lines
WO2009131923A2 (en) * 2008-04-23 2009-10-29 Gm Global Technology Operations, Inc. A solar battery charging system and optional solar hydrogen production system for vehicle propulsion

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005046198A1 (en) * 2003-11-07 2005-05-19 Cherokee Europe Sa Method and apparatus for remote powering using multiple subscriber lines
AU2004307735B2 (en) * 2003-11-07 2009-06-11 MITRA Energy & Infrastructure S.A. Method and apparatus for remote powering using multiple subscriber lines
WO2009131923A2 (en) * 2008-04-23 2009-10-29 Gm Global Technology Operations, Inc. A solar battery charging system and optional solar hydrogen production system for vehicle propulsion
WO2009131923A3 (en) * 2008-04-23 2010-03-04 Gm Global Technology Operations, Inc. A solar battery charging system and optional solar hydrogen production system for vehicle propulsion

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