JP2002063946A - Dew condensation prevention device of battery system for electric automobile - Google Patents
Dew condensation prevention device of battery system for electric automobileInfo
- Publication number
- JP2002063946A JP2002063946A JP2000250422A JP2000250422A JP2002063946A JP 2002063946 A JP2002063946 A JP 2002063946A JP 2000250422 A JP2000250422 A JP 2000250422A JP 2000250422 A JP2000250422 A JP 2000250422A JP 2002063946 A JP2002063946 A JP 2002063946A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- temperature
- dew condensation
- outside air
- temperature difference
- 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- Withdrawn
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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
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- Secondary Cells (AREA)
Abstract
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
システムの結露防止装置に関し、特にたとえば外気温度
とバッテリ雰囲気温度との温度差に応じて冷却ファンを
制御することによりバッテリ表面の結露を防止する電気
自動車用バッテリシステムの結露防止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing dew condensation in a battery system for an electric vehicle, and more particularly, to control dew condensation on a battery surface by controlling a cooling fan in accordance with a temperature difference between an outside air temperature and a battery ambient temperature. The present invention relates to a device for preventing dew condensation in a battery system for an electric vehicle.
【０００２】[0002]
【従来の技術】例えば、冬期等外気温度が低い時にバッ
テリから走行用モータに電力を供給し、このモータを駆
動制御することにより走行する電気自動車において、自
動車用バッテリシステムを長時間使用した後（長時間運
転後）このバッテリシステム全体の温度が高いまま放置
（停車状態）すると、外気温度とバッテリ温度との温度
差によりバッテリシステムを収納しているエンジンルー
ム内やバッテリ表面に結露が生じる恐れがある。2. Description of the Related Art For example, in an electric vehicle running by supplying electric power from a battery to a driving motor when the outside air temperature is low such as in winter and controlling the driving of the motor, after using a vehicle battery system for a long time ( If the temperature of the entire battery system is left high (after a long period of operation), the temperature difference between the outside air temperature and the battery temperature may cause dew condensation in the engine room containing the battery system or on the surface of the battery. is there.
【０００３】また、この温度差が小さくなった後外気温
度がさらに低下して温度差が発生した場合にも結露が生
じる恐れがある。[0003] Further, when the temperature of the outside air further decreases after the temperature difference is reduced, a dew condensation may occur even when the temperature difference occurs.
【０００４】更に、低温放置後に電気自動車を始動した
場合、バッテリ温度が上昇して温度差が発生すれば結露
する恐れがある。Further, when the electric vehicle is started after being left at a low temperature, if the battery temperature rises and a temperature difference occurs, there is a possibility that dew condensation may occur.
【０００５】[0005]
【発明が解決しようとする課題】上述のように、外気温
度とバッテリ温度の温度差によりバッテリシステムを収
納した部分（例えば、エンジンルーム、後部座席下部あ
るいはトランクルーム）やバッテリ表面に結露が発生す
ると、バッテリがリークしたりあるいはショートしたり
する可能性が極めて高くなり、電気自動車の走行に支障
を来すばかりか、搭乗者に漏電に伴う感電の危険性が生
じるという問題がある。As described above, when dew condensation occurs in a part (for example, an engine room, a lower part of a rear seat or a trunk room) or a battery surface due to a temperature difference between an outside air temperature and a battery temperature, There is a problem that the possibility that the battery leaks or short-circuits becomes extremely high, which not only hinders the operation of the electric vehicle but also causes a risk of electric shock to the occupant due to the electric leakage.
【０００６】それゆえにこの発明の主たる目的は、簡単
な構成により結露を防止できる電気自動車用バッテリシ
ステムの結露防止装置を提供することである。SUMMARY OF THE INVENTION Therefore, a main object of the present invention is to provide a dew condensation preventing device for an electric vehicle battery system which can prevent dew condensation with a simple configuration.
【０００７】[0007]
【課題を解決するための手段】この発明は、複数の単位
電池セルを直列接続して構成されるバッテリからインバ
ータを介して走行用モータに駆動電流を供給する電気自
動車用バッテリシステムにおいて、外気温度を検出する
外気温度検出手段、バッテリ温度を検出するバッテリ温
度検出手段、バッテリを冷却する送風手段、および外気
温度とバッテリ温度の温度差に応じて送風手段を制御す
る制御手段を備え、停止時でかつ外気温が所定値以下の
場合に送風手段を作動するようにしたことを特徴とす
る、電気自動車用バッテリシステムの結露防止装置であ
る。SUMMARY OF THE INVENTION The present invention relates to a battery system for an electric vehicle that supplies a drive current to a traveling motor via an inverter from a battery formed by connecting a plurality of unit battery cells in series. Outside temperature detecting means for detecting the temperature of the battery, battery temperature detecting means for detecting the battery temperature, blowing means for cooling the battery, and control means for controlling the blowing means according to the temperature difference between the outside air temperature and the battery temperature. A dew condensation preventing device for a battery system for an electric vehicle, wherein a blowing unit is operated when an outside air temperature is equal to or lower than a predetermined value.
【０００８】[0008]
【作用】外気温度とバッテリ温度の温度差に応じて、送
風手段である、例えば冷却ファンを間欠動作させて絶え
ずこの温度差を小さくすることにより結露を防止する。In accordance with the temperature difference between the outside air temperature and the battery temperature, dew condensation is prevented by continuously reducing the temperature difference by intermittently operating a cooling means, for example, a cooling fan.
【０００９】[0009]
【発明の効果】この発明によれば、結露を生じる温度差
を未然に解消することにより、電気自動車用バッテリシ
ステムを安全に維持することができる。According to the present invention, the battery system for an electric vehicle can be safely maintained by eliminating the temperature difference causing dew condensation.
【００１０】この発明の上述の目的，その他の目的，特
徴および利点は、図面を参照して以下に行う実施例の詳
細な説明により一層明らかとなろう。The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the accompanying drawings.
【００１１】[0011]
【実施例】図１に示すこの発明の一実施例である電気自
動車用バッテリシステムの結露防止装置について説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given of a dew condensation preventing device for an electric vehicle battery system according to an embodiment of the present invention shown in FIG.
【００１２】図１において、電気自動車用バッテリシス
テム１０は、複数の単位電池セル１２ａ、…１２ｎを直
列接続して構成される走行用バッテリ１２、このバッテ
リ１２の機能を維持管理するバッテリ電子制御ユニット
（以下「バッテリＥＣＵ」と言う）１４及びこのバッテ
リＥＣＵ１４により駆動制御される冷却ファン１６を含
む。In FIG. 1, a battery system 10 for an electric vehicle includes a running battery 12 formed by connecting a plurality of unit battery cells 12a,... 12n in series, and a battery electronic control unit for maintaining and managing the function of the battery 12. (Hereinafter referred to as “battery ECU”) 14 and a cooling fan 16 driven and controlled by the battery ECU 14.
【００１３】走行用バッテリ１２は、例えば１．２Ｖの
ニッケル水素蓄電池を６個直列接続したものを単位電池
セル１２ａとし、この単位電池セルを４０個直列接続し
て公称２８８Ｖとして図示されない電池ケースあるいは
電池枠体等に収納されている。そして、このバッテリ１
２の正極端子１８と負極端子２０の間には直流を交流に
周波数変換するインバータ２２を介して走行用モータ２
４が接続されている。The running battery 12 is, for example, a unit battery cell 12a formed by connecting six 1.2V nickel-metal hydride batteries in series, and a battery case (not shown) having a nominal 288V by connecting 40 unit battery cells in series. It is stored in a battery frame or the like. And this battery 1
2 between the positive terminal 18 and the negative terminal 20 of the traveling motor 2 via an inverter 22 that converts the frequency of direct current to alternating current.
4 are connected.
【００１４】一方、バッテリＥＣＵ１４は温度検出回路
２６、イグニッションスイッチＩＧＮ（キー）２８から
のＩＧＮ信号（ＯＮ／ＯＦＦ信号）の有無を検出するＩ
ＧＮ信号検出回路３０、回路電源として、例えば鉛バッ
テリ３２から給電される電源回路３４、必要なデータを
メモリに保存して入力された温度データやＩＧＮ信号に
基づいて演算処理を行うＣＰＵを有するマイコン３６及
びこのマイコン３６の演算結果に応じて冷却ファン１６
を駆動するファン駆動回路３８を含む。On the other hand, the battery ECU 14 detects the presence or absence of an IGN signal (ON / OFF signal) from the temperature detection circuit 26 and an ignition switch IGN (key) 28.
A microcomputer having a GN signal detection circuit 30, a power supply circuit 34 supplied as a circuit power supply from, for example, a lead battery 32, and a CPU that stores necessary data in a memory and performs arithmetic processing based on input temperature data and an IGN signal. 36 and the cooling fan 16 according to the calculation result of the microcomputer 36.
Is included.
【００１５】温度検出回路２６は、外気温センサ４０に
より停車中（ＩＧＮ．ＯＦＦ）あるいは走行中（ＩＧ
Ｎ．ＯＮ）の電気自動車の外気温度とバッテリ温度セン
サ４２によりバッテリ温度またはその雰囲気温度を検出
するもので、検出された各温度はデジタル信号に変換さ
れてマイコン３６により外気温度とバッテリ温度等の温
度差が算出される。The temperature detection circuit 26 is stopped (IGN.OFF) or running (IGN) by the outside air temperature sensor 40.
N. The battery temperature or its ambient temperature is detected by the outside air temperature of the electric vehicle (ON) and the battery temperature sensor 42. Each detected temperature is converted into a digital signal, and the microcomputer 36 calculates a temperature difference between the outside air temperature and the battery temperature. Is calculated.
【００１６】そして、この温度差に応じてマイコン３６
によりファン駆動回路３８に風量（ファン回転速度）お
よび作動時間を設定し、温度差が小さくなるまで冷却フ
ァン１６を間欠動作させる。この実施例においては、風
量及び作動時間を温度差によって、例えば３段階（大、
中、小）に設定している。The microcomputer 36 responds to the temperature difference.
To set the air volume (fan rotation speed) and the operation time in the fan drive circuit 38, and operate the cooling fan 16 intermittently until the temperature difference becomes small. In this embodiment, the air volume and the operation time are determined by, for example, three stages (large,
Medium, small).
【００１７】ここで、結露の可能性が高い冬期等の外気
温度を想定し、結露現象について更に考察する。Here, the outside air temperature in winter or the like where the possibility of dew condensation is high is assumed, and the dew condensation phenomenon will be further considered.
【００１８】一般的に結露する温度と湿度の関係は２次
曲線で表すことができる。一例を挙げれば、結露する温
度差は以下のようになる。In general, the relationship between the temperature and humidity at which dew condensation occurs can be represented by a quadratic curve. As an example, the dew condensation temperature difference is as follows.
【００１９】 湿度（％） ４０ ６０ ８０ 温度差（℃） １５ １０ ３ 従って、湿度条件を最大（ｍａｘ）８０％と仮定すれ
ば、以下の値となる。Humidity (%) 40 60 80 Temperature difference (° C.) 15 10 3 Accordingly, assuming that the maximum humidity condition (max) is 80%, the following values are obtained.
【００２０】すなわち、外気温２０℃、温度差大１０
℃、温度差中７℃、温度差小３℃以上のことより、この
シーケンスでは、温度差が３℃未満になるまで冷却ファ
ン１６を作動させることになる。That is, the outside air temperature is 20 ° C., and the temperature difference is
Since the temperature difference is 7 ° C., the temperature difference is 7 ° C., and the temperature difference is 3 ° C. or more, in this sequence, the cooling fan 16 is operated until the temperature difference becomes less than 3 ° C.
【００２１】次に、図２を参照して結露防止の動作フロ
ーチャートについて説明する。Next, an operation flowchart for preventing dew condensation will be described with reference to FIG.
【００２２】先ず、スタートをしてステップＳ１でＩＧ
Ｎ信号検出回路３０によりＩＧＮ．ＯＦＦを検出、つま
り車の停止を検出し、ステップＳ３で外気温センサ４０
の検出信号により温度検出回路２６で外気温度を計測す
る。次にステップＳ５では先のステップＳ３で計測され
た外気温がマイコン３６のメモリに格納されている結露
の恐れのある冬期等の外気温XX℃より低いか否かを判断
し、その結果“ＮＯ”であれば結露のおそれがないので
動作は終了する。なお、ＩＧＮ．ＯＦＦを検出するステ
ップＳ１においては、同時にステップＳ４３の定期起動
モード、例えば３分毎または５分毎に、ＩＧＮ．ＯＦＦ
時のバッテリ１２の残量（ＳＯＣ）推定を行うこともで
きる。First, start, and in step S1, IG
N signal. OFF, that is, stop of the vehicle is detected, and in step S3, the outside air temperature sensor 40 is detected.
, The outside air temperature is measured by the temperature detection circuit 26. Next, in step S5, it is determined whether or not the outside air temperature measured in the previous step S3 is lower than the outside air temperature XX ° C. stored in the memory of the microcomputer 36 in a winter season or the like where dew condensation may occur. "", There is no risk of dew condensation, and the operation is terminated. In addition, IGN. In step S1 for detecting OFF, at the same time, the IGN. OFF
It is also possible to estimate the remaining amount (SOC) of the battery 12 at the time.
【００２３】一方、ステップＳ５の結果が“ＹＥＳ”で
あればステップＳ７でバッテリ温度センサ４２の検出信
号により温度検出回路２６でバッテリ表面及びシステム
内部雰囲気温度を計測してステップＳ９でマイコン３６
により外気温との温度差を計算する。On the other hand, if the result of step S5 is "YES", the temperature of the battery surface and the internal atmosphere of the system are measured by the temperature detecting circuit 26 based on the detection signal of the battery temperature sensor 42 in step S7.
To calculate the temperature difference from the outside air temperature.
【００２４】そして、計算された温度差に応じて以後冷
却ファン１６の風量及び作動時間をマイコン３６に３段
階に設定しておき温度差が小さく（所定値に）なるまで
間欠作動させる。In accordance with the calculated temperature difference, the air flow rate and the operation time of the cooling fan 16 are set in the microcomputer 36 in three stages, and the cooling fan 16 is operated intermittently until the temperature difference becomes small (to a predetermined value).
【００２５】すなわち、ステップＳ１１では温度差大と
判断、例えば１０℃以上であれば温度差大で“ＹＥＳ”
と判断されてステップＳ１３で冷却ファン１６を所定の
モードで作動する。この場合、冷却ファン１６の風量が
強であれば作動時間は短く設定され、逆に風量が弱であ
れば作動時間は長く設定される。そして、ステップＳ１
５でバッテリＥＣＵ１４は自ら電源をＯＦＦし、ステッ
プＳ１７で設定時間経過後に、ステップＳ１９で再起動
しシーケンス制御を行う。ただし、定期起動モードで起
動した場合は、定期起動モード処理も行う。この時、ス
テップＳ２１でＩＧＮ．ＯＦＦかを判断し、その結果、
“ＹＥＳ”であればステップＳ３に戻り、“ＮＯ”であ
れば一連の動作を終了する。That is, in step S11, it is determined that the temperature difference is large.
Is determined, the cooling fan 16 is operated in a predetermined mode in step S13. In this case, if the air volume of the cooling fan 16 is high, the operation time is set short, and if the air volume is low, the operation time is set long. Then, step S1
In step 5, the battery ECU 14 turns off the power supply itself, and after a lapse of a set time in step S17, restarts in step S19 to perform sequence control. However, when the application is started in the regular start mode, the regular start mode processing is also performed. At this time, the IGN. OFF, and as a result,
If "YES", the process returns to the step S3, and if "NO", a series of operations is ended.
【００２６】ステップＳ１１で“ＮＯ”であればステッ
プＳ２３で温度差中（例えば７℃）で“ＹＥＳ”と判断
されると、ステップＳ２５で冷却ファン１６を所定のモ
ード（ステップＳ１３で説明ずみ）で作動し、ステップ
Ｓ２７で電源をＯＦＦし、更にステップＳ２９で設定時
間経過するとステップＳ３１で起動し、ステップＳ２１
でＩＧＮ．ＯＦＦかを判断する。その結果、“ＹＥＳ”
であればステップＳ３に戻り、“ＮＯ”であれば終了す
る。If "NO" is determined in the step S11, and if "YES" is determined in the temperature difference (for example, 7 ° C.) in the step S23, the cooling fan 16 is set to a predetermined mode in a step S25 (the step S13 has been described). The power is turned off in step S27, and after a lapse of a set time in step S29, the power is turned on in step S31 and the operation is started in step S21.
In IGN. Determine whether it is OFF. As a result, “YES”
If so, the process returns to step S3, and if "NO", the process ends.
【００２７】また、ステップＳ２３で温度差中でない、
つまり“ＮＯ”と判断された場合ステップＳ３３に進
み、ここで温度差小（例えば３℃）でない、つまり“Ｎ
Ｏ”と判断（３℃未満）されると冷却ファン１６を作動
する必要がないので終了する。In step S23, no difference in temperature is detected.
That is, when it is determined to be “NO”, the process proceeds to step S33, where the temperature difference is not small (for example, 3 ° C.), that is, “N”
If it is determined to be O "(less than 3 ° C.), the operation ends because there is no need to operate the cooling fan 16.
【００２８】しかし、ステップＳ３３で“ＹＥＳ”と判
断された場合、ステップＳ３５で冷却ファン１６を所定
のモード（ステップＳ１３で説明ずみ）で作動し、ステ
ップＳ３７で電源をＯＦＦし、更にステップＳ３９で設
定時間経過するとステップＳ４１で起動し、ステップＳ
２１でＩＧＮ．ＯＦＦかを判断する。その結果、“ＹＥ
Ｓ”であればステップＳ３に戻り、“ＮＯ”であれば終
了する。However, if "YES" is determined in the step S33, the cooling fan 16 is operated in a predetermined mode (explained in the step S13) in a step S35, the power is turned off in a step S37, and further, in a step S39. When the set time has elapsed, the process is started in step S41,
21 and IGN. Determine whether it is OFF. As a result, "YE
If "S", the process returns to step S3, and if "NO", the process ends.
【００２９】なお、他の実施形態としては、外気温度と
バッテリ温度の温度差に応じて冷却ファン１６の風量、
例えば強または弱を設定し、最低条件、すなわち先の実
施例における温度差３℃をクリアするまで冷却ファン１
６を連続駆動としてもよい。As another embodiment, the air flow rate of the cooling fan 16 is determined according to the temperature difference between the outside air temperature and the battery temperature.
For example, the cooling fan 1 is set to strong or weak until the minimum condition, that is, the temperature difference of 3 ° C. in the previous embodiment is cleared.
6 may be a continuous drive.
【００３０】この場合の動作フローチャートは、図２に
示すものと類似するが、相違する点は、ステップＳ１５
とＳ１９、ステップＳ２７とＳ３１およびステップＳ３
７とＳ４１においてそれぞれ電源ＯＦＦ／起動されるの
は、冷却ファン１６ではなくバッテリＥＣＵ１４にな
る。すなわち、冷却ファン１６は連続駆動されたまま、
バッテリＥＣＵ１４が間欠的に起動されて温度差をチェ
ックすることになる。The operation flowchart in this case is similar to that shown in FIG. 2, but the difference is that step S15
And S19, steps S27 and S31, and step S3
It is not the cooling fan 16 but the battery ECU 14 that is turned off / started in 7 and S41, respectively. That is, while the cooling fan 16 is continuously driven,
The battery ECU 14 is started intermittently to check the temperature difference.
【００３１】以上説明したように、この発明によれば電
気自動車用バッテリシステムにおいて、外気温度とバッ
テリ温度の温度差に応じて冷却ファンの風量または作動
時間の少なくとも一方を制御することにより、例えば冬
期等外気温が低い場合にもバッテリ表面の結露を未然に
防止することができ、電気自動車用バッテリシステムを
安全に維持管理できる。As described above, according to the present invention, in the battery system for an electric vehicle, by controlling at least one of the air flow rate and the operating time of the cooling fan in accordance with the temperature difference between the outside air temperature and the battery temperature, for example, during winter. Even when the outside temperature is low, dew condensation on the battery surface can be prevented beforehand, and the battery system for an electric vehicle can be safely maintained.
【図１】この発明の一実施例を示す電気自動車用バッテ
リシステムの結露防止装置を含むブロック構成図であ
る。FIG. 1 is a block diagram showing an embodiment of the present invention including an apparatus for preventing dew condensation in a battery system for an electric vehicle.
【図２】図１の結露防止装置を備えた電気自動車の動作
の流れを示すフローチャートである。FIG. 2 is a flowchart showing a flow of an operation of an electric vehicle including the dew condensation preventing device of FIG.
１０ …電気自動車用バッテリシステム １２ …バッテリ １２ａ〜１２ｎ …単位電池セル １４ …バッテリＥＣＵ １６ …冷却ファン（送風手段） ２２ …インバータ ２４ …走行用モータ ２６ …温度検出回路 ３６ …マイコン（制御手段） ３８ …ファン駆動回路 ４０ …外気温センサ（外気温度検出手段） ４２ …バッテリ温度センサ（バッテリ温度検出手段） DESCRIPTION OF SYMBOLS 10 ... Electric vehicle battery system 12 ... Battery 12a-12n ... Unit battery cell 14 ... Battery ECU 16 ... Cooling fan (blowing means) 22 ... Inverter 24 ... Traveling motor 26 ... Temperature detection circuit 36 ... Microcomputer (Control means) 38 ... Fan drive circuit 40 ... Outside air temperature sensor (outside air temperature detecting means) 42 ... Battery temperature sensor (battery temperature detecting means)
Claims (3)
れるバッテリからインバータを介して走行用モータに駆
動電流を供給する電気自動車用バッテリシステムにおい
て、 外気温度を検出する外気温度検出手段、 前記バッテリ温度を検出するバッテリ温度検出手段、 前記バッテリを冷却する送風手段、および前記外気温度
と前記バッテリ温度の温度差に応じて前記送風手段を制
御する制御手段を備え、停止時でかつ外気温が所定値以
下の場合に前記送風手段を作動するようにしたことを特
徴とする、電気自動車用バッテリシステムの結露防止装
置。1. An electric vehicle battery system for supplying a drive current to a traveling motor via an inverter from a battery formed by connecting a plurality of unit battery cells in series, comprising: an outside air temperature detecting means for detecting an outside air temperature; Battery temperature detecting means for detecting the battery temperature, air blowing means for cooling the battery, and control means for controlling the air blowing means according to a temperature difference between the outside air temperature and the battery temperature. Wherein the blower is operated when the pressure is equal to or less than a predetermined value.
温度差に応じて複数段階に設定する、請求項１記載の電
気自動車用バッテリシステムの結露防止装置。2. An apparatus for preventing dew condensation in a battery system for an electric vehicle according to claim 1, wherein the air volume or the operation time of said air blowing means is set in a plurality of stages according to said temperature difference.
度差が所定値になるまで作動させる、請求項１または２
記載の電気自動車用バッテリシステムの結露防止装置。3. The air blowing means is operated by the control means until the temperature difference reaches a predetermined value.
The dew condensation preventing device for a battery system for an electric vehicle according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000250422A JP2002063946A (en) | 2000-08-22 | 2000-08-22 | Dew condensation prevention device of battery system for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000250422A JP2002063946A (en) | 2000-08-22 | 2000-08-22 | Dew condensation prevention device of battery system for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002063946A true JP2002063946A (en) | 2002-02-28 |
Family
ID=18739992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000250422A Withdrawn JP2002063946A (en) | 2000-08-22 | 2000-08-22 | Dew condensation prevention device of battery system for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002063946A (en) |
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