JPH07322531A - Power supply for car - Google Patents
Power supply for carInfo
- Publication number
- JPH07322531A JPH07322531A JP6133918A JP13391894A JPH07322531A JP H07322531 A JPH07322531 A JP H07322531A JP 6133918 A JP6133918 A JP 6133918A JP 13391894 A JP13391894 A JP 13391894A JP H07322531 A JPH07322531 A JP H07322531A
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- power supply
- secondary battery
- secondary batteries
- backup
- 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
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明はバックアップ電源を必要
とする車載電子機器に電力を供給する車載電源装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle power supply device for supplying electric power to an on-vehicle electronic device requiring a backup power source.
【0002】[0002]
【従来の技術】メモリ等を備えてバックアップを必要と
する車載電子機器に対して主電源の切替にかかわらずバ
ックアップ電源としても作用する車載電源装置は、従来
なかった。2. Description of the Related Art There has been no vehicle-mounted power supply device that has a memory or the like and can function as a backup power source regardless of switching of the main power source for vehicle-mounted electronic equipment requiring backup.
【0003】本発明はメモリ等を備えてバックアップを
必要とする車載電子機器に対して主電源の切替にかかわ
らずバックアップ電源としても作用する車載電源装置を
提供することを目的とする。An object of the present invention is to provide an in-vehicle power supply device which is equipped with a memory or the like and can also function as a backup power source for an in-vehicle electronic device requiring a backup regardless of switching of a main power source.
【0004】[0004]
【課題を解決するための手段】本発明の車載電源装置
は、バックアップを必要とする車載電子機器に電力を供
給する車載電源装置であって、2以上の2次電池と、前
記2以上の2次電池の出力電圧が陽極にそれぞれ印加さ
れかつ陰極が共通接続されて前記車載電子機器内のバッ
クアップを必要とする回路に電力を供給するダイオード
と、前記2次電池の出力の1つを選択して前記車載電子
機器の主電源として供給する選択手段と、前記2次電池
の電圧を比較して電圧の低下した2次電池から電圧の低
下していない2次電池側に選択手段を切替える切替制御
手段とを備えたことを特徴とする。An on-vehicle power supply device of the present invention is an on-vehicle power supply device for supplying electric power to an on-vehicle electronic device which requires backup, and includes two or more secondary batteries and the two or more two batteries. The output voltage of the secondary battery is applied to each of the anodes and the cathodes are commonly connected to each other to select a diode for supplying power to a circuit in the on-vehicle electronic device requiring backup and one of the outputs of the secondary battery. Switching control for switching the selection means from the secondary battery whose voltage has dropped to the secondary battery side where the voltage has not dropped by comparing the voltage of the secondary battery with the selection means that supplies the main power of the on-vehicle electronic device. And means.
【0005】[0005]
【作用】本発明の車載電源装置は、2以上に2次電池中
の電圧が切替制御手段において比較されていて、切替制
御手段の制御のもとに選択手段によって電圧の低下した
2次電池側から電圧の低下していない2次電池側に切替
えられて、切替られた2次電池が主電源として車載電子
機器に電力が供給される。一方、ダイオードを介して車
載電子機器内のバックアップを必要とする回路が最も出
力電圧の高い2次電池の電力によってバックアップされ
る。In the vehicle-mounted power supply device of the present invention, the voltage in the secondary battery is compared to two or more in the switching control means, and the secondary battery side whose voltage has been reduced by the selection means under the control of the switching control means. Is switched to the secondary battery side in which the voltage has not dropped, and the switched secondary battery serves as the main power source to supply power to the on-vehicle electronic device. On the other hand, the circuit requiring backup in the vehicle-mounted electronic device is backed up by the power of the secondary battery having the highest output voltage via the diode.
【0006】したがって、切替制御手段の制御のもとに
2次電池の一つが選択手段によって切替られる切替え途
中において電源電圧の瞬断があっても、この間、2以上
の電源装置中の最も電圧の高い2次電池からダイオード
を介して車載電子機器内のバックアップを必要とする回
路がバックアップされ、バックアップ電力に瞬断が生ず
ることはない。この結果、メモリ、タイマ等を備えてバ
ックアップを必要とするオーディオ装置や、放送局リス
トなどを記憶しているメモリをラジオ受信機などの車載
電子機器のメモリに記憶されている情報が消失するよう
なことはない。Therefore, even if there is a momentary interruption of the power supply voltage during the switching in which one of the secondary batteries is switched by the selection means under the control of the switching control means, during this period, the voltage of the highest voltage among the two or more power supply devices is the highest. The circuit requiring the backup in the vehicle-mounted electronic device is backed up from the high secondary battery via the diode, and the backup power is not interrupted. As a result, the information stored in the memory of the on-vehicle electronic device such as the radio receiver may be lost from the audio device equipped with the memory, the timer, etc. that needs to be backed up and the memory storing the broadcast station list etc. There is no such thing.
【0007】[0007]
【実施例】以下、本発明を実施例により説明する。図1
は本発明にかかる車載電源装置の一実施例の構成を示す
ブロック図である。EXAMPLES The present invention will be described below with reference to examples. Figure 1
FIG. 1 is a block diagram showing a configuration of an embodiment of a vehicle-mounted power supply device according to the present invention.
【0008】本一実施例の車載電源装置は、2次電池3
および4を備えて、2次電池3および4は切替スイッチ
2に供給して、切替スイッチ2によって選択した方の2
次電池からの電力を車載電子機器としての例えば車載オ
ーディオ装置1に供給する。一方、2次電池3および4
の出力電圧はそれぞれダイオード5および6の陽極に各
別に印加し、ダイオード5の陰極およびダイオード6の
陰極は共通に接続してダイオード5または6を介し抵抗
7を通して、車載オーデイオ装置1内のメモリ等バック
アップを必要とする回路(以下単に、メモリ等と記す)
にバックアップのための電力を供給する。ダイオード5
および6は高電位側の2次電池を自動的に選択するため
であって、逆流防止のために挿入してあり、抵抗7はバ
ックアップのための電流は少なくてすむことから電流制
限のために接続してある。The vehicle-mounted power supply device according to this embodiment includes a secondary battery 3
And 4, the secondary batteries 3 and 4 are supplied to the changeover switch 2, and the one of the two selected by the changeover switch 2 is supplied.
The power from the secondary battery is supplied to, for example, the vehicle-mounted audio device 1 as the vehicle-mounted electronic device. On the other hand, the secondary batteries 3 and 4
Output voltage is applied to the anodes of the diodes 5 and 6, respectively, and the cathode of the diode 5 and the cathode of the diode 6 are connected in common, and the resistor 7 is connected through the diode 5 or 6 to the memory etc. in the vehicle audio device 1. Circuits that require backup (hereinafter simply referred to as memory, etc.)
Supply power for backup. Diode 5
6 and 6 are for automatically selecting the secondary battery on the high potential side, and are inserted to prevent backflow, and the resistor 7 requires only a small amount of current for backup. It is connected.
【0009】2次電池3および4の出力電圧は切替制御
回路8に供給し、切替制御回路8において両出力電圧を
比較し出力電圧の高い方の2次電池を選択するべく切替
スイッチ2を切替制御する。符号11は充電装置であっ
て、充電装置11は逆流防止のためのダイオード9およ
び10を各別に介して2次電池3および4を充電するよ
うに接続してある。The output voltages of the secondary batteries 3 and 4 are supplied to the changeover control circuit 8, and the changeover control circuit 8 compares the two output voltages and changes over the changeover switch 2 so as to select the secondary battery having the higher output voltage. Control. Reference numeral 11 is a charging device, and the charging device 11 is connected so as to charge the secondary batteries 3 and 4 through diodes 9 and 10 for preventing backflow separately.
【0010】上記のように構成された本一実施例の車載
電源装置において、2次電池3および4の電圧は切替制
御回路8において比較されて高い方を選択するべく切替
スイッチ2が切替制御回路8によって制御される。した
がって、車載オーディオ装置1に主電源として2次電池
3また4の電圧の高い方の2次電池からの電力が供給さ
れて車載オーディオ装置1は動作する。一方、2次電池
3および4の出力電圧はダイオード5および6に供給さ
れて高い方の出力電圧が抵抗7を通して、車載オーディ
オ装置1内のメモリ等に供給される。In the on-vehicle power supply device of the present embodiment configured as described above, the changeover switch 2 is used to change the voltages of the secondary batteries 3 and 4 in the changeover control circuit 8 and select the higher one. Controlled by 8. Therefore, the in-vehicle audio device 1 operates by being supplied with power from the secondary battery 3 or 4 having the higher voltage as the main power source to the in-vehicle audio device 1. On the other hand, the output voltages of the secondary batteries 3 and 4 are supplied to the diodes 5 and 6, and the higher output voltage is supplied to the memory or the like in the vehicle audio device 1 through the resistor 7.
【0011】切替制御回路8の制御のもとに2次電池3
と4とが切替スイッチ2によって切替られる途中におい
て瞬断が生ずるが、この瞬断の期間においても2次電池
3または4から電力がダイオード5または6を介して車
載オーディオ装置1内のメモリ等に供給されて、車載オ
ーディオ装置1内のメモリ等がバックアップされるため
に、車載オーディオ装置1内のメモリ等の記憶内容が消
滅するようなことはない。Under control of the switching control circuit 8, the secondary battery 3
And 4 are switched by the changeover switch 2, a momentary interruption occurs. Even during this momentary interruption, power is supplied from the secondary battery 3 or 4 to the memory or the like in the vehicle audio device 1 via the diode 5 or 6. Since the data is supplied and the memory and the like in the vehicle-mounted audio device 1 is backed up, the stored contents of the memory and the like in the vehicle-mounted audio device 1 will not be lost.
【0012】2次電池3、4の放電によって2次電池
3、4の出力電圧が所定値に低下するとダイオード9、
10を介して2次電池3、4が自動的に充電装置11に
よって充電される。したがって、出力電圧の高い方の2
次電池が充電のための所定値に低下しておらず、出力電
圧の低い方の2次電池の出力電圧が充電のための所定値
に低下したときは該2次電池が充電されることになる。
この結果、充電によって他方の2次電池の出力電圧より
も充電された側の2次電池の出力電圧が上昇したときは
この旨が切替制御回路8によって検出されて切替スイッ
チ2によって2次電池の切替えが行われることになる。When the output voltage of the secondary batteries 3, 4 drops to a predetermined value due to the discharge of the secondary batteries 3, 4, the diode 9,
The secondary batteries 3 and 4 are automatically charged by the charging device 11 via 10. Therefore, the one with the higher output voltage
If the secondary battery has not dropped to the predetermined value for charging and the output voltage of the secondary battery with the lower output voltage has dropped to the predetermined value for charging, the secondary battery is charged. Become.
As a result, when the output voltage of the charged secondary battery is higher than the output voltage of the other secondary battery due to charging, this is detected by the changeover control circuit 8 and the changeover switch 2 changes the output voltage of the secondary battery. Switching will be performed.
【0013】なお、上記した一実施例において、2次電
池を2個用いた場合を例示したが2以上の複数であって
も同様に構成できる。In the above-described embodiment, the case where two secondary batteries are used has been illustrated, but the same constitution can be made even if a plurality of secondary batteries are used.
【0014】例えば、動力用の電池からの電力によって
車輛の駆動を行う電気自動車においては、動力用の電池
には200V前後の高電圧のものが使用され、車載オー
ディオ装置などの他の装置のための低電圧を得るために
はDC−DCコンバータなどが必要となる。しかし、上
記した本一実施例の車載電源装置では、消費電力が少な
いために小型の2次電池を用いても、長時間の使用に耐
え、かつ複数の2次電池を用いて切替て使用するため、
DC−DCコンバータなどが必要ないなど簡易に構成で
きる。さらに充電装置を使用する場合に、ソーラーチャ
ージャ等を使用することもできる。For example, in an electric vehicle in which a vehicle is driven by electric power from a power battery, a power battery having a high voltage of about 200 V is used for other devices such as an on-vehicle audio device. A DC-DC converter or the like is required to obtain the low voltage. However, in the above-described vehicle-mounted power supply device of the present embodiment, since the power consumption is small, even if a small secondary battery is used, it can be used for a long time, and a plurality of secondary batteries are used by switching. For,
It can be easily configured such that a DC-DC converter is not required. Further, when using the charging device, a solar charger or the like can be used.
【0015】[0015]
【発明の効果】以上説明した如く本発明の車載電源装置
によれば、複数の2次電池で構成されるため小型であ
り、かつ主電源として車載電子機器に電力を供給できる
と共に、バックアップ電源として瞬断することなく車載
電子機器内のメモリ等のバックアップができる効果があ
る。As described above, according to the on-vehicle power supply device of the present invention, it is compact because it is composed of a plurality of secondary batteries, and it is possible to supply power to the on-vehicle electronic equipment as the main power source and also as the backup power source. There is an effect that it is possible to back up the memory and the like in the in-vehicle electronic device without instantaneous interruption.
【図1】本発明にかかる車載電源装置の一実施例の構成
を示すブロック図である。FIG. 1 is a block diagram showing the configuration of an embodiment of an in-vehicle power supply device according to the present invention.
1 車載オーディオ装置 2 切替スイッチ 3および4 2次電池 5、6、9および10 ダイオード 8 切替制御回路 11 充電装置 1 In-vehicle audio device 2 Changeover switch 3 and 4 Secondary battery 5, 6, 9 and 10 Diode 8 Changeover control circuit 11 Charging device
Claims (1)
電力を供給する車載電源装置であって、2以上の2次電
池と、前記2以上の2次電池の出力電圧が陽極にそれぞ
れ印加されかつ陰極が共通接続されて前記車載電子機器
内のバックアップを必要とする回路に電力を供給するダ
イオードと、前記2次電池の出力の1つを選択して前記
車載電子機器の主電源として供給する選択手段と、前記
2次電池の電圧を比較して電圧の低下した2次電池から
電圧の低下していない2次電池側に選択手段を切替える
切替制御手段とを備えたことを特徴とする車載電源装
置。1. An on-vehicle power supply device for supplying electric power to an on-vehicle electronic device requiring backup, comprising two or more secondary batteries, and output voltages of the two or more secondary batteries applied to respective anodes. A diode having a cathode commonly connected to supply power to a circuit in the vehicle-mounted electronic device that requires backup, and a selection of one of the outputs of the secondary battery to supply the selected power source as the main power source of the vehicle-mounted electronic device. A vehicle-mounted power supply comprising: means for comparing the voltage of the secondary battery; and switching control means for switching the selecting means from the secondary battery whose voltage has dropped to the secondary battery side whose voltage has not dropped apparatus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6133918A JPH07322531A (en) | 1994-05-25 | 1994-05-25 | Power supply for car |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6133918A JPH07322531A (en) | 1994-05-25 | 1994-05-25 | Power supply for car |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07322531A true JPH07322531A (en) | 1995-12-08 |
Family
ID=15116136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6133918A Pending JPH07322531A (en) | 1994-05-25 | 1994-05-25 | Power supply for car |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07322531A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008220039A (en) * | 2007-03-05 | 2008-09-18 | Hitachi Ltd | Power supply circuit and brake controller provided with the same |
DE102005040077B4 (en) | 2004-08-24 | 2018-12-20 | Denso Corporation | Vehicle power supply with two power supplies |
-
1994
- 1994-05-25 JP JP6133918A patent/JPH07322531A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005040077B4 (en) | 2004-08-24 | 2018-12-20 | Denso Corporation | Vehicle power supply with two power supplies |
JP2008220039A (en) * | 2007-03-05 | 2008-09-18 | Hitachi Ltd | Power supply circuit and brake controller provided with the same |
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