JP3414004B2 - Electric vehicle battery temperature controller - Google Patents
Electric vehicle battery temperature controllerInfo
- Publication number
- JP3414004B2 JP3414004B2 JP28799794A JP28799794A JP3414004B2 JP 3414004 B2 JP3414004 B2 JP 3414004B2 JP 28799794 A JP28799794 A JP 28799794A JP 28799794 A JP28799794 A JP 28799794A JP 3414004 B2 JP3414004 B2 JP 3414004B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- battery
- current
- peltier element
- heat
- 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.)
- Expired - Fee Related
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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電気自動車用バッテ
リの冷却、加熱の温度調節を自動的に行う電気自動車用
バッテリの温度調節装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle battery temperature adjusting device for automatically adjusting the temperature of cooling and heating of an electric vehicle battery.
【０００２】[0002]
【従来の技術】電気自動車に搭載されるバッテリは大型
のもので、放電時には発熱して高温に達するためにその
冷却を必要とし、また反対にバッテリの放電効率を良く
するためには室温程度の温度にバッテリ温度を保たなけ
ればならず、例えば冬季の始動時のようにバッテリ温度
が極端に下がっている時には加熱する必要がある。2. Description of the Related Art A battery installed in an electric vehicle is large in size and needs to be cooled in order to generate heat and reach a high temperature during discharge. The battery temperature must be kept at a certain temperature, and needs to be heated when the battery temperature is extremely low, for example, at the time of starting in winter.
【０００３】そこで従来では、図５に示すようにバッテ
リ収納部１上に収納されているバッテリ２に対してその
底部にヒーター３を設置し、また冷却ファン４をバッテ
リ収納部１に設置していた。そして、バッテリ温度が低
い時にはヒーター３に通電してバッテリ２を加熱し、逆
にバッテリ温度が高くなり過ぎれは、冷却ファン４を起
動して冷却風をバッテリ２の周囲に通流させて冷却する
ようにしていた。Therefore, conventionally, as shown in FIG. 5, a heater 3 is installed at the bottom of the battery 2 housed in the battery housing 1, and a cooling fan 4 is installed in the battery housing 1. It was When the battery temperature is low, the heater 3 is energized to heat the battery 2. On the contrary, when the battery temperature becomes too high, the cooling fan 4 is activated to allow cooling air to flow around the battery 2 for cooling. Was doing.
【０００４】[0004]
【発明が解決しようとする課題】ところが、このような
従来の電気自動車用バッテリの温度調節装置では、特に
バッテリを冷却する場合に冷却ファンからの空気によっ
て冷やすだけであるために熱効率が悪くて十分な冷却効
果が得られず、必要な冷却能力を実現するためには冷却
ファンに大容量のものを用いる必要があり、それだけ消
費電力が大きくなり、車載バッテリからその電力を得て
いるために電気自動車の航続走行距離を縮めてしまう問
題点があった。However, in such a conventional battery temperature control device for an electric vehicle, thermal efficiency is poor because it is only cooled by air from a cooling fan, especially when the battery is cooled. In order to achieve the required cooling capacity, it is necessary to use a cooling fan with a large capacity, which consumes a large amount of power. There was a problem that the cruising range of the car was shortened.
【０００５】この発明はこのような従来の問題点に鑑み
てなされたもので、加熱冷却のためにペルチェ素子を利
用してバッテリの冷却を効率良く行えるようにした電気
自動車用バッテリの温度調節装置を提供することを目的
とする。The present invention has been made in view of the above-mentioned conventional problems, and a Peltier element is used for heating and cooling so that the battery can be efficiently cooled by an electric vehicle battery temperature controller. The purpose is to provide.
【０００６】[0006]
【課題を解決するための手段】請求項１の発明の電気自
動車用バッテリの温度調節装置は、バッテリの温度を測
定する温度測定手段と、バッテリの適正温度帯を設定す
る温度帯設定手段と、温度測定手段が測定するバッテリ
温度を温度帯設定手段が設定する適正温度帯と比較する
温度比較手段と、バッテリに密着して取り付けられたペ
ルチェ素子と、ペルチェ素子の外側に取り付けられた放
熱フィンと、放熱フィンに空気を吹き付ける冷却ファン
と、ペルチェ素子に対して、冷却必要時に当該ペルチェ
素子の放熱フィンと接触する外側が発熱し、バッテリに
密着する内側が吸熱する方向に電流を流し、加熱必要時
に当該ペルチェ素子のバッテリと密着する内側が発熱
し、放熱フィンと接触する外側が吸熱する方向に電流を
流すように電流方向を切替えてバッテリに接続する電流
方向切替手段と、冷却ファンをバッテリに接続するファ
ン起動スイッチと、温度比較手段によってバッテリ温度
が適正温度帯を超える高温状態にあると判定する時に電
流方向切替手段に冷却必要時の電流が流れる方向に電流
方向を切替させると共にファン起動スイッチを投入し、
バッテリ温度が適正温度帯に達しない低温状態にあると
判定する時に電流方向切替手段に加熱必要時の電流が流
れる方向に電流方向を切替させる接続制御手段とを備え
たものである。According to a first aspect of the present invention, there is provided a temperature adjusting device for a battery for an electric vehicle, a temperature measuring means for measuring a temperature of the battery, and a temperature zone setting means for setting an appropriate temperature zone of the battery. A temperature comparing means for comparing the battery temperature measured by the temperature measuring means with an appropriate temperature zone set by the temperature zone setting means; a Peltier element closely attached to the battery; and a radiation fin attached to the outside of the Peltier element. , The cooling fan that blows air to the radiating fins, and the Peltier element, when cooling is required, the outside that contacts the radiating fins of the Peltier element generates heat, and the inside that is in close contact with the battery causes current to flow in the direction of absorbing heat, and heating is required. Sometimes the current direction is such that the inside of the Peltier element, which is in close contact with the battery, generates heat, and the outside in contact with the heat radiation fins absorbs heat. The current direction switching means for switching and connecting to the battery, the fan start switch for connecting the cooling fan to the battery, and the current direction switching means when the temperature comparing means determines that the battery temperature is in a high temperature state exceeding the appropriate temperature range. Switch the current direction to the direction in which the current flows when necessary and turn on the fan start switch.
When it is determined that the battery temperature is in a low temperature state where the battery temperature does not reach the appropriate temperature range, the current direction switching means is provided with connection control means for switching the current direction to the direction in which the current flows when heating is required.
【０００７】請求項２の発明は、請求項１の電気自動車
用バッテリの温度調節装置において、温度比較手段が適
正温度帯とバッテリ温度との差の大きさを算出して出力
し、接続制御手段が適正温度帯とバッテリ温度との差の
大きさに応じて電流方向切替手段を通じて流れる電流を
可変制御するようにしたものである。According to a second aspect of the present invention, in the temperature control device for a battery for an electric vehicle according to the first aspect, the temperature comparison means calculates and outputs the magnitude of the difference between the proper temperature zone and the battery temperature, and the connection control means. In accordance with the magnitude of the difference between the proper temperature zone and the battery temperature, the current flowing through the current direction switching means is variably controlled.
【０００８】[0008]
【作用】請求項１の発明の電気自動車用バッテリの温度
調節装置では、常にバッテリ温度を測定して適正温度帯
と比較し、バッテリ温度が適正温度帯を超える高温状態
にあると判定する時には、ペルチェ素子の放熱フィンと
接触する外側を発熱させ、バッテリに密着する内側が吸
熱する方向に電流を流すように電流の通電方向を切替制
御し、同時に冷却ファンを起動し、これによってバッテ
リの発熱をペルチェ素子で吸熱して放熱フィンから放熱
させ、バッテリ温度を下げるようにする。逆にバッテリ
温度が適正温度帯に達しない低温状態にあると判定する
時には、ペルチェ素子のバッテリに密着する内側が発熱
する方向に電流を流すように電流の通電方向を切替制御
し、これによってバッテリをペルチェ素子の発熱によっ
て加熱してバッテリ温度を上昇させる。In the temperature control device for an electric vehicle battery according to the first aspect of the present invention, the battery temperature is constantly measured and compared with an appropriate temperature zone, and when it is determined that the battery temperature is in a high temperature state exceeding the appropriate temperature zone, The outside of the Peltier element, which is in contact with the heat radiation fins, is heated, and the inside of the Peltier element, which is in close contact with the battery, is switched so that the current flows in a direction that absorbs heat.At the same time, the cooling fan is started, which causes the battery to heat up. The Peltier element absorbs heat and the heat radiation fins dissipate the heat to lower the battery temperature. Conversely, when it is determined that the battery temperature is in a low temperature state where it does not reach the proper temperature range, the current passing direction is controlled to flow so that the inner side of the Peltier element, which is in close contact with the battery, generates heat, thereby switching the battery current direction. Is heated by the heat generated by the Peltier device to raise the battery temperature.
【０００９】こうして、ペルチェ素子を利用してヒータ
ーで加熱する場合に必要とされる電力と同じ程度の電力
でバッテリの加熱あるいは冷却を行い、バッテリの温度
調節を行う。In this way, the temperature of the battery is adjusted by heating or cooling the battery with the same power as that required when heating the heater using the Peltier element.
【００１０】請求項２の発明の電気自動車用バッテリの
温度調節装置では、バッテリ適正温度帯とバッテリ実温
度との差の大きさを求め、この差の大きさに応じて加熱
電流又は冷却電流制御を行うことにより、バッテリ温度
の調節を精度良く行う。In the temperature control device for an electric vehicle battery according to a second aspect of the present invention, the magnitude of the difference between the battery proper temperature zone and the actual battery temperature is obtained, and the heating current or cooling current control is performed according to the magnitude of the difference. By performing the above, the battery temperature is accurately adjusted.
【００１１】[0011]
【実施例】以下、この発明の実施例を図に基づいて詳説
する。図１は請求項１及び請求項２の発明の共通する実
施例の機械的な構成を示しており、図２は回路構成を示
している。まず機械的な構成について説明すると、図１
に示すように、車両の中央底部に形成されているバッテ
リ収納部１１にバッテリ２が収納、支持されており、各
バッテリ２の底面に密着するようにペルチェ素子伝熱板
１２が密着するように取り付けられている。この取付は
ネジ止め、接着、あるいは緊縛などの手段によって行
う。バッテリ収納部１の下部には冷却風の通流のための
ダクト部１３が形成されており、その入口には冷却ファ
ン１４が設置されている。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a mechanical structure of a common embodiment of the inventions of claims 1 and 2, and FIG. 2 shows a circuit structure. First, the mechanical structure will be described.
As shown in FIG. 2, the batteries 2 are stored and supported in the battery storage portion 11 formed in the central bottom portion of the vehicle, and the Peltier element heat transfer plate 12 is closely attached so as to be in close contact with the bottom surface of each battery 2. It is installed. This attachment is done by means of screwing, gluing, or binding. A duct portion 13 for passing cooling air is formed in the lower portion of the battery storage portion 1, and a cooling fan 14 is installed at the inlet thereof.
【００１２】ペルチェ素子伝熱板１２の構造は図３及び
図４に示すように、各バッテリ２の底部に内側が密着す
るように取り付けられ、外側に放熱フィン１５が取り付
けられていて、この放熱フィン１５がダクト部１３に露
出するように設定されている。As shown in FIGS. 3 and 4, the structure of the Peltier element heat transfer plate 12 is attached so that the inner side is in close contact with the bottom of each battery 2, and the heat radiating fins 15 are attached on the outer side. The fins 15 are set to be exposed in the duct portion 13.
【００１３】ペルチェ素子伝熱板１２に対する電流方向
制御回路は図２に示す構成である。すなわち、電流方向
切替回路部１７と、バッテリ２に設けられている温度セ
ンサ１８からの温度信号によってバッテリ温度を検出
し、適正温度帯と比較することによってバッテリ冷却方
向、加熱方向の電流切替制御信号を生成するコントロー
ラ１９と、冷却ファン１４に対するスイッチングトラン
ジスタ２０と、電源２１（この電源２１にはバッテリ２
が利用される）から構成されている。The current direction control circuit for the Peltier element heat transfer plate 12 has the structure shown in FIG. That is, the battery temperature is detected by the temperature signals from the current direction switching circuit unit 17 and the temperature sensor 18 provided in the battery 2, and the current switching control signal for the battery cooling direction and the heating direction is detected by comparing the battery temperature with the appropriate temperature band. A controller 19 for generating a switching transistor 20, a switching transistor 20 for the cooling fan 14, and a power source 21 (the power source 21 includes a battery 2
Is used).
【００１４】さらに電流方向制御回路の電流方向切替回
路部１７はブリッジに組まれたトランジスタＴｒ１〜Ｔ
ｒ４から構成されている。またコントローラ１９は温度
センサ１８からの温度信号からバッテリ温度を検出する
バッテリ温度検出部１９ａと、検出されたバッテリ温度
を適正温度帯との関連で評価する高温検出部１９ｂ及び
低温検出部１９ｃから構成されている。Further, the current direction switching circuit section 17 of the current direction control circuit includes transistors Tr1 to T assembled in a bridge.
It is composed of r4. Further, the controller 19 includes a battery temperature detection unit 19a that detects the battery temperature from the temperature signal from the temperature sensor 18, and a high temperature detection unit 19b and a low temperature detection unit 19c that evaluate the detected battery temperature in relation to an appropriate temperature zone. Has been done.
【００１５】次に、上記構成の電気自動車用バッテリの
温度調節装置の動作について説明する。図２の回路図に
示すように、温度センサ１８によってバッテリ液温度を
監視し、その検出信号をコントローラ１９に入力する。
コントローラ１９では、バッテリ温度検出部１９ａにお
いて温度信号からバッテリ温度Ｔｂを検出し、その検出
温度Ｔｂを高温検出部１９ｂ及び低温検出部１９ｃに与
え、ここであらかじめ設定されている適正温度帯［Ｔ
ｈ，Ｔｃ］に対してその上限温度Ｔｈを超えているか、
下限温度Ｔｃより低くないか、適正温度帯内にあるかを
判断する。Next, the operation of the battery temperature controller for the electric vehicle having the above structure will be described. As shown in the circuit diagram of FIG. 2, the temperature sensor 18 monitors the battery fluid temperature, and the detection signal is input to the controller 19.
In the controller 19, the battery temperature detection unit 19a detects the battery temperature Tb from the temperature signal and supplies the detected temperature Tb to the high temperature detection unit 19b and the low temperature detection unit 19c, where the preset proper temperature range [T
h, Tc], the upper limit temperature Th is exceeded,
It is determined whether the temperature is not lower than the lower limit temperature Tc or is within the proper temperature range.
【００１６】いまバッテリ温度Ｔｂが高くて適正温度帯
の上限温度Ｔｈを超えている場合、バッテリを冷却する
必要があるので、高温検出部１９ｂにおいて（Ｔｂ−Ｔ
ｈ）の差の大きさに応じたデューティ比のゲート信号
２，３をトランジスタＴｒ２，Ｔｒ３に出力し、電流方
向切替回路部１７のトランジスタＴｒ２，Ｔｒ３のスイ
ッチングを行う。これによって、トランジスタＴｒ２，
Ｔｒ３がオンする時にペルチェ素子伝熱板１２に矢印Ｉ
ｃで示す方向にゲート信号２，３のデューティ比で定め
られる大きさの電流が流れる。これと同時に、高温検出
部１９ｂはファンオン信号５を出力し、これによってス
イッチングトランジスタ２０もオンして冷却ファン１４
が起動される。When the battery temperature Tb is now higher than the upper limit temperature Th in the proper temperature range, the battery needs to be cooled, so that the high temperature detecting section 19b (Tb-T
The gate signals 2 and 3 having the duty ratios corresponding to the magnitude of the difference h) are output to the transistors Tr2 and Tr3 to switch the transistors Tr2 and Tr3 of the current direction switching circuit unit 17. As a result, the transistors Tr2,
When Tr3 turns on, an arrow I appears on the Peltier element heat transfer plate 12.
A current having a magnitude determined by the duty ratio of the gate signals 2 and 3 flows in the direction indicated by c. At the same time, the high temperature detector 19b outputs a fan-on signal 5, which also turns on the switching transistor 20 to turn on the cooling fan 14.
Is started.
【００１７】こうしてペルチェ素子伝熱板１２に冷却用
電流Ｉｃが流れ、冷却ファン２０が起動されると、図３
に示すように、ペルチェ素子伝熱板１２はバッテリ２に
密着している内側が吸熱、放熱フィン１５が取り付けら
れている外側が発熱し、バッテリ２の熱を吸熱して放熱
フィン１５まで伝達し、ここで冷却ファン１４によって
ダクト部１３を通流するようになった空気に放熱し、各
バッテリ２を冷却することになる。In this way, when the cooling current Ic flows through the Peltier element heat transfer plate 12 and the cooling fan 20 is started, FIG.
As shown in, the Peltier element heat transfer plate 12 absorbs heat inside the battery 2 and the outside where the heat radiation fins 15 are attached, and absorbs the heat of the battery 2 and transfers it to the heat radiation fins 15. Here, the cooling fan 14 radiates heat to the air flowing through the duct portion 13 to cool each battery 2.
【００１８】逆に図２に示した回路図において、バッテ
リ温度Ｔｂが適正温度帯［Ｔｈ，Ｔｃ］に対してその下
限温度Ｔｃよりも低い場合、コントローラ１９の低温検
出部１９ｃが下限温度Ｔｃとバッテリ温度Ｔｂとの差の
大きさに応じたデューティ比のゲート信号１，４をトラ
ンジスタＴr1，Ｔｒ４に出力し、電流方向切替回路部１
７のトランジスタＴｒ１，Ｔｒ４のスイッチングを行
う。これによって、トランジスタＴｒ１，Ｔｒ４がオン
とする時にペルチェ素子伝熱板１２に矢印Ｉｈで示す方
向にゲート信号１，４のデューティ比で定められる大き
さの電流が流れる。On the contrary, in the circuit diagram shown in FIG. 2, when the battery temperature Tb is lower than the lower limit temperature Tc with respect to the proper temperature range [Th, Tc], the low temperature detecting section 19c of the controller 19 sets the lower limit temperature Tc to the lower limit temperature Tc. The gate signals 1 and 4 having a duty ratio according to the magnitude of the difference from the battery temperature Tb are output to the transistors Tr1 and Tr4, and the current direction switching circuit unit 1
7 transistors Tr1 and Tr4 are switched. As a result, when the transistors Tr1 and Tr4 are turned on, a current having a magnitude determined by the duty ratio of the gate signals 1 and 4 flows in the Peltier element heat transfer plate 12 in the direction indicated by the arrow Ih.
【００１９】こうしてペルチェ素子伝熱板１２に加熱用
電流Ｉｈが流れると、図４に示すように、ペルチェ素子
伝熱板１２はバッテリ２に密着している内側が発熱し、
放熱フィン１５が取り付けられている外側が吸熱し、こ
れによって各バッテリ２を加熱することになる。When the heating current Ih flows through the Peltier element heat transfer plate 12 in this way, as shown in FIG. 4, the Peltier element heat transfer plate 12 generates heat inside the battery 2, which is in close contact with the battery 2.
The outside to which the heat radiation fins 15 are attached absorbs heat, thereby heating each battery 2.
【００２０】そしてコントローラ１９のバッテリ温度検
出部１９ａが検出するバッテリ温度Ｔｂが適正温度帯
［Ｔｈ，Ｔｃ］の範囲内であれば、高温検出部１９ｂも
低温検出部１９ｃもゲート信号を出力せず、バッテリ２
は加熱、冷却いずれも行われないことになる。If the battery temperature Tb detected by the battery temperature detector 19a of the controller 19 is within the proper temperature range [Th, Tc], neither the high temperature detector 19b nor the low temperature detector 19c outputs a gate signal. , Battery 2
Will not be heated or cooled.
【００２１】このようにしてこの実施例の電気自動車用
バッテリの温度調節装置によれば、ペルチェ素子を利用
してそこに通流させる電流方向をバッテリ温度が高温時
には冷却する方向に、逆に低温時には加熱する方向に切
替える制御を行うようにしているので、放熱効果が高い
ペルチェ素子を用いてバッテリを冷却することができる
と共に、必要な場合には加熱することもでき、従来から
用いられてきた加熱用のヒータに使用する電流量と同じ
程度の電流量でバッテリの温度調節をすることができる
ようになる。As described above, according to the battery temperature control apparatus for an electric vehicle of this embodiment, the direction of the current flowing through the Peltier element is reduced to the direction of cooling when the battery temperature is high, while the temperature is reduced to the low temperature. Since it is sometimes controlled to switch to the heating direction, it is possible to cool the battery using a Peltier element that has a high heat dissipation effect, and it is also possible to heat it when necessary, which has been used conventionally. It becomes possible to adjust the temperature of the battery with the same amount of current as that used for the heater for heating.
【００２２】なお、上記実施例では適正温度帯［Ｔｈ，
Ｔｃ］の上限温度Ｔｈとバッテリ温度Ｔｂとの差の大き
さ、また下限温度Ｔｃとバッテリ温度Ｔｂとの差の大き
さによって電流方向切替用のスイッチングトランジスタ
のゲート信号のデューティ比を制御し、流れる冷却用電
流Ｉｃや加熱用電流Ｉｈの大きさを可変制御するように
したが、これには特に限定されず、高温時、低温時それ
ぞれにおいて一定の電流を通流させる簡単な構成とする
こともできる。In the above embodiment, the proper temperature range [Th,
The duty ratio of the gate signal of the switching transistor for switching the current direction is controlled by the magnitude of the difference between the upper limit temperature Th of Tc] and the battery temperature Tb, and the magnitude of the difference between the lower limit temperature Tc and the battery temperature Tb. Although the magnitudes of the cooling current Ic and the heating current Ih are variably controlled, the present invention is not particularly limited to this, and a simple configuration in which a constant current flows at high temperature and low temperature may be adopted. it can.
【００２３】また、複数のバッテリそれぞれに対応して
コントローラ１９を設け、個別に温度調節する構成とす
ることもできる。It is also possible to provide a controller 19 corresponding to each of a plurality of batteries and individually adjust the temperature.
【００２４】[0024]
【発明の効果】以上のように請求項１の発明によれば、
常にバッテリ温度を測定して適正温度帯と比較し、バッ
テリ温度が適正温度帯を超える高温状態にあると判定す
る時には、ペルチェ素子の放熱フィンと接触する外側を
発熱させ、バッテリに密着する内側が吸熱する方向に電
流を流すように電流の通電方向を切替制御し、同時に冷
却ファンを起動し、これによってバッテリの発熱をペル
チェ素子で吸熱して放熱フィンから放熱させ、バッテリ
温度を下げるようにし、逆にバッテリ温度が適正温度帯
に達しない低温状態にあると判定する時には、ペルチェ
素子のバッテリに密着する内側が発熱する方向に電流を
流すように電流の通電方向を切替制御し、これによって
バッテリをペルチェ素子の発熱によって加熱してバッテ
リ温度を上昇させるようにしているので、放熱効率の良
いペルチェ素子を利用してバッテリの温度調節を行うこ
とができ、従来のように大容量の冷却ファンを用いなく
ても、ヒーターで加熱する場合に必要とされる電力と同
じ程度の電力でバッテリに対する加熱、冷却による温度
調節ができる。As described above, according to the invention of claim 1,
When the battery temperature is constantly measured and compared with the proper temperature range, and when it is determined that the battery temperature is in a high temperature state that exceeds the proper temperature range, the outside that contacts the heat radiation fins of the Peltier element generates heat and the inside that adheres closely to the battery is The energizing direction of the current is switched and controlled so that the current flows in the direction of absorbing heat, and at the same time, the cooling fan is started, whereby the heat generated by the battery is absorbed by the Peltier element and radiated from the heat radiation fins, and the battery temperature is lowered. Conversely, when it is determined that the battery temperature is in a low temperature state where it does not reach the proper temperature range, the current passing direction is controlled to flow so that the inner side of the Peltier element, which is in close contact with the battery, generates heat, thereby switching the battery current direction. The heat of the Peltier element is used to heat the battery to raise the battery temperature. The temperature of the battery can be adjusted by using the heating and cooling function to heat and cool the battery with the same power as that required when heating with a heater without using a large capacity cooling fan as in the past. The temperature can be adjusted by.
【００２５】請求項２の発明によれば、バッテリ適正温
度帯とバッテリ実温度との差の大きさを求め、この差の
大きさに応じて加熱電流又は冷却電流制御を行うように
しているので、バッテリ温度の調節が精度良く行える。According to the second aspect of the present invention, the magnitude of the difference between the battery proper temperature zone and the actual battery temperature is obtained, and the heating current or cooling current is controlled according to the magnitude of the difference. The battery temperature can be adjusted accurately.
【図１】この発明の一実施例の機械的な構成を示す断面
図。FIG. 1 is a sectional view showing a mechanical structure of an embodiment of the present invention.
【図２】上記実施例の回路構成を示すブロック図。FIG. 2 is a block diagram showing a circuit configuration of the above embodiment.
【図３】上記実施例のバッテリ冷却動作を示す断面図。FIG. 3 is a cross-sectional view showing a battery cooling operation of the above embodiment.
【図４】上記実施例のバッテリ加熱動作を示す断面図。FIG. 4 is a cross-sectional view showing the battery heating operation of the above embodiment.
【図５】従来例の機械的な構成を示す断面図。FIG. 5 is a cross-sectional view showing a mechanical configuration of a conventional example.
２ バッテリ １１ バッテリ収納部 １２ ペルチェ素子伝熱板 １３ ダクト部 １４ 冷却ファン １５ 放熱フィン １７ 電流方向切替部 １８ 温度センサ １９ コントローラ ２０ スイッチングトランジスタ 2 battery 11 Battery compartment 12 Peltier element heat transfer plate 13 Duct part 14 Cooling fan 15 radiating fins 17 Current direction switching unit 18 Temperature sensor 19 Controller 20 switching transistors
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 10/42 - 10/54 H02J 7/00 - 7/12 B60K 1/00 - 11/08 B60L 1/00 - 15/42 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields investigated (Int.Cl. 7 , DB name) H01M 10/42-10/54 H02J 7/00-7/12 B60K 1/00-11/08 B60L 1 / 00-15/42
Claims (2)
と、 前記バッテリの適正温度帯を設定する温度帯設定手段
と、 前記温度測定手段が測定するバッテリ温度を前記温度帯
設定手段が設定する適正温度帯と比較する温度比較手段
と、 前記バッテリに密着して取り付けられたペルチェ素子
と、 前記ペルチェ素子の外側に取り付けられた放熱フィン
と、 前記放熱フィンに空気を吹き付ける冷却ファンと、 前記ペルチェ素子に対して、冷却必要時に当該ペルチェ
素子の前記放熱フィンと接触する外側が発熱し、前記バ
ッテリに密着する内側が吸熱する方向に電流を流し、加
熱必要時に当該ペルチェ素子の前記バッテリと密着する
内側が発熱し、前記放熱フィンと接触する外側が吸熱す
る方向に電流を流すように電流方向を切替えて前記バッ
テリに接続する電流方向切替手段と、 前記冷却ファンを前記バッテリに接続するファン起動ス
イッチと、 前記温度比較手段によってバッテリ温度が適正温度帯を
超える高温状態にあると判定する時に前記電流方向切替
手段に冷却必要時の電流が流れる方向に電流方向を切替
させると共に前記ファン起動スイッチを投入し、バッテ
リ温度が適正温度帯に達しない低温状態にあると判定す
る時に前記電流方向切替手段に加熱必要時の電流が流れ
る方向に電流方向を切替させる接続制御手段とを備えて
成る電気自動車用バッテリの温度調節装置。1. A temperature measuring means for measuring a temperature of a battery, a temperature zone setting means for setting an appropriate temperature zone of the battery, and a temperature range setting means for setting a battery temperature measured by the temperature measuring means. A temperature comparing means for comparing with a temperature zone; a Peltier element closely attached to the battery; a radiation fin attached to the outside of the Peltier element; a cooling fan for blowing air to the radiation fin; and a Peltier element On the other hand, when cooling is required, the outside of the Peltier element in contact with the heat radiation fins generates heat, and the inside of the Peltier element in close contact with the battery passes a current in a direction of absorbing heat, and the inside of the Peltier element in close contact with the battery when heating is required. Generates heat, and the current direction is switched so that current flows in a direction in which the outside in contact with the heat radiation fins absorbs heat. A current direction switching means connected to the battery, a fan start switch connecting the cooling fan to the battery, and the current direction switching means when the temperature comparison means determines that the battery temperature is in a high temperature state exceeding an appropriate temperature range. When switching the current direction to the direction in which the current when cooling is required and turning on the fan start switch, when it is determined that the battery temperature is in a low temperature state that does not reach the proper temperature zone, the current direction switching means A temperature control device for an electric vehicle battery, comprising: a connection control means for switching a current direction to a direction in which a current flows.
ッテリ温度との差の大きさを算出して出力し、 前記接続制御手段が前記適正温度帯とバッテリ温度との
差の大きさに応じて前記電流方向切替手段を通じて流れ
る電流を可変制御することを特徴とする請求項１記載の
電気自動車用バッテリの温度調節装置。2. The temperature comparing means calculates and outputs a magnitude of a difference between the appropriate temperature zone and the battery temperature, and the connection control means responds to the magnitude of a difference between the appropriate temperature zone and the battery temperature. 2. The temperature adjusting device for an electric vehicle battery according to claim 1, wherein the current flowing through the current direction switching means is variably controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28799794A JP3414004B2 (en) | 1994-11-22 | 1994-11-22 | Electric vehicle battery temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28799794A JP3414004B2 (en) | 1994-11-22 | 1994-11-22 | Electric vehicle battery temperature controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08148189A JPH08148189A (en) | 1996-06-07 |
| JP3414004B2 true JP3414004B2 (en) | 2003-06-09 |
Family
ID=17724473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28799794A Expired - Fee Related JP3414004B2 (en) | 1994-11-22 | 1994-11-22 | Electric vehicle battery temperature controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3414004B2 (en) |
Cited By (1)
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| Publication number | Publication date |
|---|---|
| JPH08148189A (en) | 1996-06-07 |
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