JP2008096383A - Apparatus for diagnosing temperature detecting means - Google Patents

Apparatus for diagnosing temperature detecting means Download PDF

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JP2008096383A
JP2008096383A JP2006281403A JP2006281403A JP2008096383A JP 2008096383 A JP2008096383 A JP 2008096383A JP 2006281403 A JP2006281403 A JP 2006281403A JP 2006281403 A JP2006281403 A JP 2006281403A JP 2008096383 A JP2008096383 A JP 2008096383A
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temperature
temperature detection
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JP4992373B2 (en
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Hiroshi Kaneko
寛 金子
Shinsuke Yoshida
伸輔 吉田
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Nissan Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To detect a short circuit and failure of a plurality of temperature sensors in a system provided with a plurality of the temperature sensors. <P>SOLUTION: The temperature sensor 5 detects a temperature of a region upstream of a cooling wind among regions in a module 8 cooled by the cooling wind from a battery fan 2. The temperature sensor 6 detects a temperature of a region downstream of the cooling wind. When the cooling fan 2 is actuated, a battery controller 1 detects the short circuit and the failure of the temperature sensors 5, 6 based on the temperatures detected by the temperature sensors 5, 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、温度検出手段の短絡故障を検出する温度検出手段の診断装置に関する。   The present invention relates to a diagnostic device for temperature detection means for detecting a short-circuit fault in the temperature detection means.

従来、組電池を構成する複数のモジュールに温度センサを設け、複数の温度センサで検出される温度の平均温度を組電池の温度として検出する技術が知られている（特許文献１参照）。   2. Description of the Related Art Conventionally, a technique is known in which temperature sensors are provided in a plurality of modules constituting an assembled battery, and an average temperature detected by the plurality of temperature sensors is detected as the temperature of the assembled battery (see Patent Document 1).

特開２００２−１６５３８０号公報JP 2002-165380 A

温度センサを複数設けるシステムにおいて、温度センサの信号出力線が短絡する故障が生じると、組電池の検出温度に誤差が生じるが、従来の技術では、このような短絡故障を検出することができなかった。   In a system with multiple temperature sensors, if a failure occurs that shorts the signal output line of the temperature sensor, an error occurs in the detection temperature of the assembled battery, but the conventional technology cannot detect such a short-circuit failure. It was.

本発明による温度検出手段の診断装置は、冷媒によって冷却可能な温度検出対象物の各部位のうち、冷媒の上流側の部位の温度を第１の温度検出手段で検出するとともに、冷媒の下流側の部位の温度を第２の温度検出手段で検出し、冷媒が流れている状態で、第１の温度検出手段によって検出される第１の温度と、第２の温度検出手段によって検出される第２の温度とに基づいて、第１の温度検出手段および第２の温度検出手段の短絡故障を検出することを特徴とする。   The diagnostic device for temperature detection means according to the present invention detects, with the first temperature detection means, the temperature of the upstream part of the refrigerant among the parts of the temperature detection target that can be cooled by the refrigerant, and the downstream side of the refrigerant. The first temperature detected by the first temperature detecting means and the second temperature detecting means detected by the second temperature detecting means in a state where the refrigerant is flowing in the second temperature detecting means. Based on the second temperature, a short circuit failure of the first temperature detection means and the second temperature detection means is detected.

本発明による温度検出手段の診断装置によれば、２つ以上の温度検出手段の短絡故障を検出することができる。   According to the diagnostic device for temperature detecting means according to the present invention, it is possible to detect a short-circuit failure of two or more temperature detecting means.

図１は、一実施の形態における温度検出手段の診断装置の構成を示す図である。以下では、一実施の形態における温度検出手段の診断装置をハイブリッド車に搭載して使用する例を挙げて説明する。バッテリパック７は、ケース内部にモジュール８を内蔵している。モジュール（組電池）８は、複数の単電池（セル）から構成されており、図示しない車両駆動用モータに電力を供給するとともに、モータの回生運転時に発電される電力によって、充電される。   FIG. 1 is a diagram showing a configuration of a diagnostic device for temperature detection means in one embodiment. Hereinafter, an example in which the diagnostic device for temperature detection means in one embodiment is mounted on a hybrid vehicle will be described. The battery pack 7 has a module 8 built in the case. The module (assembled battery) 8 is composed of a plurality of single cells (cells), supplies power to a vehicle drive motor (not shown), and is charged by power generated during regenerative operation of the motor.

バッテリパック７のケースは、ダクト１０およびダクト９を介して、車室内と通じている。車室内とダクト９との間には、ダクト９内への異物の流入を防ぐために、網目状の吸入口１２が設けられている。バッテリパック７のケースは、また、ダクト１１を介して、車外と通じている。車外とダクト１１との間には、ダクト１１内への異物の流入を防ぐために、網目状の排出口１３が設けられている。   The case of the battery pack 7 communicates with the vehicle interior via the duct 10 and the duct 9. A mesh-shaped suction port 12 is provided between the passenger compartment and the duct 9 in order to prevent inflow of foreign matter into the duct 9. The case of the battery pack 7 also communicates with the outside of the vehicle via the duct 11. A mesh-shaped discharge port 13 is provided between the outside of the vehicle and the duct 11 in order to prevent foreign matter from flowing into the duct 11.

ダクト９とダクト１０との間には、バッテリファン２が設けられている。バッテリファン２は、後述するバッテリコントローラ１からの指示に基づいて作動して、モジュール８を冷却する。バッテリファン２の作動時には、車室内の空気が吸入口１２を介して、ダクト９内に入り、ダクト１０、ダクト１１、および、排出口１３を介して、車外に抜けていく。   A battery fan 2 is provided between the duct 9 and the duct 10. The battery fan 2 operates based on an instruction from the battery controller 1 described later to cool the module 8. When the battery fan 2 is in operation, the air in the vehicle compartment enters the duct 9 through the inlet 12 and escapes outside the vehicle through the duct 10, the duct 11, and the outlet 13.

室内空気温度センサ３は、室内空気温度Ｔｒを検出して、バッテリコントローラ１に出力する。吸入空気温度センサ４は、ダクト９内の吸入空気温度Ｔｉを検出して、バッテリコントローラ１に出力する。電流センサ１４は、モジュール８の充放電電流Ｉを検出して、バッテリコントローラ１に出力する。回転数センサ１５は、バッテリファン２の回転数Ｒｂを検出して、バッテリコントローラ１に出力する。   The indoor air temperature sensor 3 detects the indoor air temperature Tr and outputs it to the battery controller 1. The intake air temperature sensor 4 detects the intake air temperature Ti in the duct 9 and outputs it to the battery controller 1. The current sensor 14 detects the charge / discharge current I of the module 8 and outputs it to the battery controller 1. The rotation speed sensor 15 detects the rotation speed Rb of the battery fan 2 and outputs it to the battery controller 1.

バッテリ温度センサ５およびバッテリ温度センサ６は、それぞれモジュール８の異なる部位の温度を計測する。具体的には、バッテリ温度センサ５は、吸入口１２から排出口１３の方向に流れる冷却風（冷媒）の上流側の部位の温度ＴbAを検出し、バッテリ温度センサ６は、冷却風の下流側の部位の温度ＴbBを検出する。   The battery temperature sensor 5 and the battery temperature sensor 6 each measure the temperature of a different part of the module 8. Specifically, the battery temperature sensor 5 detects the temperature TbA of the upstream portion of the cooling air (refrigerant) flowing from the inlet 12 to the outlet 13 and the battery temperature sensor 6 is downstream of the cooling air. The temperature TbB of the part is detected.

バッテリコントローラ１は、ＣＰＵ１ａ、メモリ１ｂ、および、カウンタ１ｃを備え、モジュール８の入力／出力可能パワーや、ＳＯＣ等を算出して、モジュール８の充放電を制御する。また、バッテリコントローラ１は、バッテリ温度センサ５，６によってそれぞれ検出されるバッテリ温度ＴbAおよびＴbBのうち、高い方のバッテリ温度に応じて、バッテリファン２を作動させる。すなわち、バッテリ温度が高くなるほど、バッテリファン２の作動速度（ファン回転数）を速くする。   The battery controller 1 includes a CPU 1a, a memory 1b, and a counter 1c. The battery controller 1 calculates the input / output possible power of the module 8, the SOC, and the like, and controls charging / discharging of the module 8. Further, the battery controller 1 operates the battery fan 2 according to the higher one of the battery temperatures TbA and TbB detected by the battery temperature sensors 5 and 6, respectively. That is, as the battery temperature increases, the operating speed (fan rotation speed) of the battery fan 2 is increased.

また、バッテリコントローラ１は、後述する方法によって、バッテリ温度センサ５，６の短絡故障を検出する。ここで、短絡故障とは、バッテリ温度センサ５，６の検出温度が同一値で固定される故障であり、例えば、バッテリ温度センサ５およびバッテリコントローラ１の間を結ぶ信号線２５と、バッテリ温度センサ６およびバッテリコントローラ１の間を結ぶ信号線２６との間が短絡する故障や、バッテリコントローラ１の信号入力端子のうち、信号線２５の入力端子と信号線２６の入力端子との間が接触する故障などが含まれる。   Further, the battery controller 1 detects a short circuit failure of the battery temperature sensors 5 and 6 by a method described later. Here, the short circuit failure is a failure in which the detected temperatures of the battery temperature sensors 5 and 6 are fixed at the same value. For example, the signal line 25 connecting the battery temperature sensor 5 and the battery controller 1 and the battery temperature sensor 6 and the signal line 26 connecting between the battery controller 1 and the signal line 26 of the battery controller 1 are in contact with each other between the input terminal of the signal line 25 and the input terminal of the signal line 26. Includes breakdowns.

図２は、一実施の形態における温度検出手段の診断装置によって行われる処理内容を示すフローチャートである。車両が起動すると、バッテリコントローラ１は、ステップＳ１０の処理を開始する。ステップＳ１０では、カウンタ１ｃのカウンタ値Ｃｔ、および、後述する電流積算値Ｉｓをリセットして、ステップＳ２０に進む。   FIG. 2 is a flowchart showing the content of processing performed by the diagnostic device for temperature detection means in one embodiment. When the vehicle is activated, the battery controller 1 starts the process of step S10. In step S10, the counter value Ct of the counter 1c and a current integrated value Is described later are reset, and the process proceeds to step S20.

ステップＳ２０では、電流センサ１４によって検出される充放電電流Ｉ、バッテリ温度センサ５によって検出されるバッテリ温度ＴbA、バッテリ温度センサ６によって検出されるバッテリ温度ＴbB、室内空気温度センサ３によって検出される室内空気温度Ｔｒ、吸入空気温度センサ４によって検出される吸入空気温度Ｔｉ、および、回転数センサ１５によって検出される回転数Ｒｂを取得して、ステップＳ３０に進む。   In step S20, the charging / discharging current I detected by the current sensor 14, the battery temperature TbA detected by the battery temperature sensor 5, the battery temperature TbB detected by the battery temperature sensor 6, and the indoor air temperature sensor 3 detected by the room air temperature sensor 3. The air temperature Tr, the intake air temperature Ti detected by the intake air temperature sensor 4, and the rotational speed Rb detected by the rotational speed sensor 15 are acquired, and the process proceeds to step S30.

ステップＳ３０では、バッテリ温度センサ５によって検出されるバッテリ温度ＴbAと、バッテリ温度センサ６によって検出されるバッテリ温度ＴbBとの差の絶対値が所定温度Ｔ１より小さいか否かを判定する。所定温度Ｔ１は、バッテリ温度ＴbAおよびＴbBがほぼ同一とみなせる値であるか否かを判定するためのしきい値であり、温度センサ５，６の検出精度誤差や、バッテリコントローラ１の分解能等を考慮して、適切な値を予め設定しておく。バッテリ温度ＴbAおよびＴbBの差の絶対値が所定温度Ｔ１以上であると判定すると、ステップＳ１０に戻り、所定温度Ｔ１未満であると判定すると、ステップＳ４０に進む。   In step S30, it is determined whether or not the absolute value of the difference between the battery temperature TbA detected by the battery temperature sensor 5 and the battery temperature TbB detected by the battery temperature sensor 6 is smaller than a predetermined temperature T1. The predetermined temperature T1 is a threshold value for determining whether or not the battery temperatures TbA and TbB are values that can be regarded as substantially the same. The detection accuracy error of the temperature sensors 5 and 6, the resolution of the battery controller 1, and the like are determined. Considering this, an appropriate value is set in advance. If it is determined that the absolute value of the difference between the battery temperatures TbA and TbB is equal to or higher than the predetermined temperature T1, the process returns to step S10. If it is determined that the absolute value is lower than the predetermined temperature T1, the process proceeds to step S40.

ステップＳ４０では、次式（１）により、電流センサ１４によって検出される充放電電流Ｉの電流積算値Ｉｓを求める。
Ｉｓ＝Ｉｓ＋｜Ｉ｜ （１） In step S40, the current integrated value Is of the charge / discharge current I detected by the current sensor 14 is obtained by the following equation (1).
Is = Is + | I | (1)

ステップＳ４０に続くステップＳ５０では、次式（２）および（３）が成り立つか否かを判定する。
Ｒｂ＞Ｒｂ１ （２）
｜Ｔｒ−Ｔｉ｜＜Ｔｂｒ （３） In step S50 following step S40, it is determined whether or not the following expressions (2) and (3) hold.
Rb> Rb1 (2)
| Tr-Ti | <Tbr (3)

ここで、式（２）におけるＲｂは、回転数センサ１５によって検出される回転数であり、Ｒｂ１は所定のしきい値である。所定のしきい値Ｒｂ１は、バッテリファン２の作動時に、バッテリ温度ＴbAとＴbBとの間で温度差が生じるような回転数に設定しておく。すなわち、式（２）では、バッテリファン２が所定の回転数Ｒｂ１より大きい回転数で作動しているか否かを判定している。   Here, Rb in Equation (2) is the rotation speed detected by the rotation speed sensor 15, and Rb1 is a predetermined threshold value. The predetermined threshold value Rb1 is set to a rotational speed at which a temperature difference occurs between the battery temperatures TbA and TbB when the battery fan 2 is operated. That is, in Expression (2), it is determined whether or not the battery fan 2 is operating at a rotational speed greater than the predetermined rotational speed Rb1.

また、式（３）におけるＴｒは、室内空気温度センサ３によって検出される室内空気温度、Ｔｉは、吸入空気温度センサ４によって検出される吸入空気温度、Ｔｂｒは、所定のしきい値温度である。バッテリファン２が作動していれば、室内空気温度Ｔｒと吸入空気温度Ｔｉとの差の絶対値は小さくなるが、吸入口１２またはダクト９の詰まりが発生している場合には、室内空気温度Ｔｒと吸入空気温度Ｔｉとの差の絶対値は大きくなる。すなわち、式（３）では、吸入口１２またはダクト９の詰まりが発生していないかを判定しており、室内空気温度Ｔｒと吸入空気温度Ｔｉとの差の絶対値が所定のしきい値温度Ｔｂｒより低ければ、吸入口１２またはダクト９の詰まりは発生していないと判定する。   Further, Tr in Equation (3) is the indoor air temperature detected by the indoor air temperature sensor 3, Ti is the intake air temperature detected by the intake air temperature sensor 4, and Tbr is a predetermined threshold temperature. . If the battery fan 2 is operating, the absolute value of the difference between the indoor air temperature Tr and the intake air temperature Ti is small. However, if the suction port 12 or the duct 9 is clogged, the indoor air temperature The absolute value of the difference between Tr and the intake air temperature Ti increases. That is, in the expression (3), it is determined whether the suction port 12 or the duct 9 is clogged, and the absolute value of the difference between the indoor air temperature Tr and the intake air temperature Ti is a predetermined threshold temperature. If it is lower than Tbr, it is determined that the inlet 12 or duct 9 is not clogged.

上式（２）および（３）は、モジュール８が冷却される状態にあるか否かを判定するための式である。式（２）または式（３）の関係が成り立たないと判定すると、ステップＳ２０に戻る。一方、式（２）および（３）の関係が成り立つ、すなわち、モジュール８が冷却される状態にあると判定すると、ステップＳ６０に進む。ステップＳ６０では、カウンタ１ｃのカウンタ値Ｃｔを１つカウントアップして、ステップＳ７０に進む。   The above equations (2) and (3) are equations for determining whether or not the module 8 is in a cooled state. If it is determined that the relationship of Expression (2) or Expression (3) does not hold, the process returns to Step S20. On the other hand, if it is determined that the relationship of the expressions (2) and (3) is established, that is, the module 8 is in a state of being cooled, the process proceeds to step S60. In step S60, the counter value Ct of the counter 1c is incremented by 1, and the process proceeds to step S70.

ステップＳ７０では、次式（４）および（５）の関係が成り立つか否かを判定する。
Ｃｔ＞Ｃ１ （４）
Ｉｓ＞Ｉｓ１ （５）
ここで、式（４）におけるＣｔは、カウンタ１ｃのカウンタ値であり、Ｃ１は所定のしきい値である。式（４）は、ステップＳ３０の判定およびステップＳ５０の判定を肯定する状態が所定時間以上継続したか否かを判定するための式である。また、式（５）におけるＩｓは、ステップＳ４０で算出した電流積算値であり、Ｉｓ１は、所定のしきい値である。所定のしきい値Ｉｓ１は、充放電によるモジュール８の発熱量が所定量以上であるか否かを判定するためのしきい値であり、実験等を行うことにより、予め適切な値に設定しておく。 In step S70, it is determined whether or not the relationship of the following expressions (4) and (5) holds.
Ct> C1 (4)
Is> Is1 (5)
Here, Ct in Expression (4) is a counter value of the counter 1c, and C1 is a predetermined threshold value. Expression (4) is an expression for determining whether or not the state in which the determination in step S30 and the determination in step S50 are positive continues for a predetermined time or more. In the equation (5), Is is the current integrated value calculated in step S40, and Is1 is a predetermined threshold value. The predetermined threshold Is1 is a threshold for determining whether or not the amount of heat generated by the module 8 due to charging / discharging is equal to or greater than a predetermined amount, and is set to an appropriate value in advance by performing an experiment or the like. Keep it.

ステップＳ７０において、式（４）または（５）の関係が成り立たないと判定すると、ステップＳ２０に戻る。一方、式（４）および（５）の関係が成り立つと判定すると、ステップＳ８０に進む。   If it is determined in step S70 that the relationship of formula (4) or (5) does not hold, the process returns to step S20. On the other hand, if it is determined that the relationship between the expressions (4) and (5) is established, the process proceeds to step S80.

ステップＳ８０では、バッテリ温度センサ５，６の短絡故障が生じていると判定する。モジュール８が発熱している状態で、バッテリファン２の冷却風によってモジュール８が冷却されている場合、冷却風の上流側に設けられているバッテリ温度センサ５によって検出される温度ＴbAと、冷却風の下流側に設けられているバッテリ温度センサ６によって検出されるバッテリ温度ＴbBとの間には、温度差が生じる。しかし、検出温度ＴbAと検出温度ＴbBとの間の温度差が所定のしきい値温度Ｔ１より低い場合には、バッテリ温度センサ５，６の短絡故障が生じていると判定する。   In step S80, it is determined that a short circuit failure has occurred in the battery temperature sensors 5, 6. When the module 8 is cooled by the cooling air of the battery fan 2 while the module 8 is generating heat, the temperature TbA detected by the battery temperature sensor 5 provided on the upstream side of the cooling air, and the cooling air There is a temperature difference between the battery temperature TbB detected by the battery temperature sensor 6 provided on the downstream side. However, when the temperature difference between the detected temperature TbA and the detected temperature TbB is lower than the predetermined threshold temperature T1, it is determined that a short circuit failure has occurred in the battery temperature sensors 5 and 6.

図３は、モジュール８の温度を算出する処理内容を示すフローチャートであり、図２に示すフローチャートの処理と並行して、バッテリコントローラ１によって行われる。なお、モジュール８の温度は、モジュール８の容量（ＳＯＣ）の算出、劣化度の算出等の各種制御時に用いられる。具体的には、例えば、充放電電流（Ｉ）と電圧（Ｖ）とから内部抵抗を算出し、算出した内部抵抗を下記のように算出したモジュール８の温度に基づく係数で補正して劣化度を求めたり、補正した内部抵抗を用いてＳＣＯを算出し、算出した劣化度やＳＯＣに基づいてモジュールの充放電制御を行う。なお、これらの制御は、電池の制御として一般的に行われる公知の制御内容であり、ここでは詳述しない。   FIG. 3 is a flowchart showing the processing contents for calculating the temperature of the module 8, and is performed by the battery controller 1 in parallel with the processing of the flowchart shown in FIG. The temperature of the module 8 is used in various controls such as the calculation of the capacity (SOC) of the module 8 and the calculation of the degree of deterioration. Specifically, for example, the internal resistance is calculated from the charging / discharging current (I) and the voltage (V), and the calculated internal resistance is corrected by a coefficient based on the temperature of the module 8 calculated as follows, and the degree of deterioration is calculated. The SCO is calculated using the corrected internal resistance, and the module charge / discharge control is performed based on the calculated deterioration degree and SOC. These controls are well-known control contents that are generally performed as battery controls, and will not be described in detail here.

ステップＳ１００では、バッテリ温度センサ５，６の短絡故障が生じているか否かを判定する。この判定は、図２のフローチャートのステップＳ８０の処理を行ったか否かに基づいて行う。バッテリ温度センサ５，６の短絡故障が生じていないと判定すると、ステップＳ１２０に進む。   In step S100, it is determined whether or not a short circuit failure has occurred in the battery temperature sensors 5 and 6. This determination is made based on whether or not the process of step S80 in the flowchart of FIG. 2 has been performed. If it is determined that no short circuit failure has occurred in the battery temperature sensors 5, 6, the process proceeds to step S120.

ステップＳ１２０では、次式（６）より、バッテリ温度センサ５，６によって検出されるバッテリ温度ＴbAおよびＴbBの平均温度Ｔｂavを、モジュール８の温度として算出する。
Ｔｂav＝（ＴbA＋ＴbB）／２ （６） In step S120, the average temperature Tbav of the battery temperatures TbA and TbB detected by the battery temperature sensors 5 and 6 is calculated as the temperature of the module 8 from the following equation (6).
Tbav = (TbA + TbB) / 2 (6)

一方、ステップＳ１００において、バッテリ温度センサ５，６の短絡故障が生じていると判定すると、ステップＳ１１０に進む。ステップＳ１１０では、次式（７）に基づいて求められる温度Ｔｂavを、モジュール８の温度として算出する。
Ｔｂav＝（ＴbA＋ＴbB）／２×ｋ１ （７）
ただし、ｋ１（０＜ｋ１＜１）は、所定の係数であり、バッテリ温度センサ５，６の短絡故障が生じた場合の実温度と、センサ検出温度との関係に基づいて、予め定めておく。すなわち、式（７）では、バッテリ温度センサ５の検出温度ＴbAおよびバッテリ温度センサ６の検出温度ＴbBに基づいて、平均温度Ｔｂavを推定している。 On the other hand, if it is determined in step S100 that a short circuit failure has occurred in the battery temperature sensors 5 and 6, the process proceeds to step S110. In step S110, the temperature Tbav obtained based on the following equation (7) is calculated as the temperature of the module 8.
Tbav = (TbA + TbB) / 2 × k1 (7)
However, k1 (0 <k1 <1) is a predetermined coefficient, and is determined in advance based on the relationship between the actual temperature when the short circuit failure of the battery temperature sensors 5 and 6 occurs and the sensor detection temperature. . That is, in Expression (7), the average temperature Tbav is estimated based on the detected temperature TbA of the battery temperature sensor 5 and the detected temperature TbB of the battery temperature sensor 6.

一実施の形態における温度検出手段の診断装置によれば、冷媒である冷却風によって冷却可能な温度検出対象物の各部位のうち、冷媒の上流側の部位の温度を温度センサ５で検出するとともに、冷媒の下流側の部位の温度を温度センサ６で検出し、冷媒が流れている状態で、温度センサ５によって検出される第１の温度と、温度センサ６によって検出される第２の温度とに基づいて、温度センサ５および温度センサ６の短絡故障を検出する。これにより、温度センサ５，６の短絡故障を検出することができる。   According to the diagnostic device of the temperature detection means in one embodiment, the temperature sensor 5 detects the temperature of the part upstream of the refrigerant among the parts of the temperature detection target that can be cooled by the cooling air that is the refrigerant. The temperature of the downstream portion of the refrigerant is detected by the temperature sensor 6, and the first temperature detected by the temperature sensor 5 and the second temperature detected by the temperature sensor 6 in a state where the refrigerant flows. Based on the above, a short circuit failure of the temperature sensor 5 and the temperature sensor 6 is detected. Thereby, the short circuit failure of the temperature sensors 5 and 6 can be detected.

特に、一実施の形態における温度検出手段の診断装置によれば、温度検出対象物が発熱しており、かつ、冷媒が流れている状態で、温度センサ５によって検出される第１の温度と、温度センサ６によって検出される第２の温度とに基づいて、温度センサ５および温度センサ６の短絡故障を検出する。冷媒が流れているだけの状態に比べて、さらに、温度検出対象物が発熱している場合には、温度センサ５，６によって検出される温度にさらに偏差が生じやすくなるため、温度センサ５，６の温度検出値に基づいて、より確実に、温度センサ５および温度センサ６の短絡故障を検出することができる。   In particular, according to the diagnostic device of the temperature detection means in one embodiment, the first temperature detected by the temperature sensor 5 in a state where the temperature detection object is generating heat and the refrigerant is flowing, Based on the second temperature detected by the temperature sensor 6, a short circuit failure of the temperature sensor 5 and the temperature sensor 6 is detected. Since the temperature detected by the temperature sensors 5 and 6 is more likely to have a deviation when the temperature detection object is generating heat as compared with the state in which only the refrigerant is flowing, the temperature sensor 5 Based on the detected temperature value of 6, the short circuit failure of the temperature sensor 5 and the temperature sensor 6 can be detected more reliably.

特に、一実施の形態における温度検出手段の診断装置によれば、温度検出対象物の発熱量が所定値以上であり、かつ、冷媒が流れている状態で、温度センサ５によって検出される第１の温度と、温度センサ６によって検出される第２の温度とに基づいて、温度センサ５および温度センサ６の短絡故障を検出する。温度検出対象物の発熱量が所定値以上であり、かつ、冷媒が流れている状態では、温度センサ５，６によって検出される温度にさらに偏差が生じやすくなるため、温度センサ５，６の温度検出値に基づいて、より確実に、温度センサ５および温度センサ６の短絡故障を検出することができる。   In particular, according to the diagnostic device of the temperature detection means in one embodiment, the first detected by the temperature sensor 5 in a state where the calorific value of the temperature detection object is not less than a predetermined value and the refrigerant is flowing. And the second temperature detected by the temperature sensor 6, a short-circuit failure of the temperature sensor 5 and the temperature sensor 6 is detected. In a state where the heat generation amount of the temperature detection object is equal to or greater than a predetermined value and the refrigerant is flowing, the temperature detected by the temperature sensors 5 and 6 is more likely to have a deviation. Based on the detected value, it is possible to detect the short circuit failure of the temperature sensor 5 and the temperature sensor 6 more reliably.

一実施の形態における温度検出手段の診断装置によれば、冷媒の流路（ダクト）に詰まりが発生していないと判定すると、温度センサ５および温度センサ６の短絡故障診断を行う。冷媒流路に詰まりが発生している場合には、温度検出対象物を効果的に冷却することができないため、温度センサ５，６の温度検出値に偏差が生じにくくなり、短絡故障を正確に判定することができなくなる。従って、冷媒流路に詰まりが発生していない時に短絡故障診断を行うことにより、短絡故障診断を正確に行うことができる。   According to the diagnostic device of the temperature detection means in one embodiment, if it is determined that the refrigerant flow path (duct) is not clogged, a short circuit failure diagnosis of the temperature sensor 5 and the temperature sensor 6 is performed. When clogging occurs in the refrigerant flow path, the temperature detection target cannot be cooled effectively, so that the temperature detection values of the temperature sensors 5 and 6 are less likely to be deviated, and the short-circuit failure is accurately detected. It becomes impossible to judge. Therefore, the short-circuit failure diagnosis can be performed accurately by performing the short-circuit failure diagnosis when the refrigerant flow passage is not clogged.

一実施の形態における温度検出手段の診断装置によれば、温度センサ５によって検出される温度ＴbAと、温度センサ６によって検出される温度ＴbBとの差の絶対値が所定温度Ｔ１より低い状態が所定時間以上継続すると、温度センサ５および温度センサ６が短絡故障していると判定するので、短絡故障が発生しているか否かを精度良く判定することができる。   According to the diagnostic device for temperature detection means in one embodiment, a state where the absolute value of the difference between the temperature TbA detected by the temperature sensor 5 and the temperature TbB detected by the temperature sensor 6 is lower than the predetermined temperature T1 is predetermined. If it continues for more than time, since it determines with the temperature sensor 5 and the temperature sensor 6 having a short circuit failure, it can be determined accurately whether the short circuit failure has generate | occur | produced.

また、一実施の形態における温度検出手段の診断装置によれば、温度センサ５，６の短絡故障時には、バッテリ温度センサ５の検出温度ＴbAおよびバッテリ温度センサ６の検出温度ＴbBに基づいて、平均温度Ｔｂavを推定するので、温度センサ５，６の短絡故障時でも、温度検出対象物の温度を推定することができる。   Further, according to the diagnostic device of the temperature detecting means in the embodiment, when the temperature sensors 5 and 6 are short-circuited, the average temperature is determined based on the detected temperature TbA of the battery temperature sensor 5 and the detected temperature TbB of the battery temperature sensor 6. Since Tbav is estimated, the temperature of the temperature detection object can be estimated even when the temperature sensors 5 and 6 are short-circuited.

本発明は、上述した一実施の形態に限定されることはない。例えば、温度検出対象物として、モジュール８を例に挙げたが、モジュールに限られることはない。また、温度検出対象物であるモジュールを冷却するための冷媒として、冷却風を用いたが、冷媒が冷却風に限定されることはなく、例えば、水やオイルなどを用いることもできる。   The present invention is not limited to the embodiment described above. For example, the module 8 has been described as an example of the temperature detection target, but is not limited to the module. Moreover, although cooling air was used as a refrigerant | coolant for cooling the module which is a temperature detection target object, a refrigerant | coolant is not limited to cooling air, For example, water, oil, etc. can also be used.

上述した一実施の形態では、温度検出手段の診断装置をハイブリッド車に搭載して使用する例を挙げて説明したが、電気自動車や燃料電池車に搭載して使用することもできるし、車両以外のシステムに適用することもできる。   In the above-described embodiment, an example in which the temperature detection means is mounted on a hybrid vehicle has been described as an example. However, the temperature detection unit may be mounted on an electric vehicle or a fuel cell vehicle. It can also be applied to other systems.

また、本発明が温度検出手段である温度センサの種類によって限定されることもない。   Further, the present invention is not limited by the type of temperature sensor that is a temperature detecting means.

特許請求の範囲の構成要素と一実施の形態の構成要素との対応関係は次の通りである。すなわち、温度センサ５が第１の温度検出手段を、温度センサ６が第２の温度検出手段を、バッテリコントローラ１が故障診断手段、詰まり判定手段、および、温度算出手段をそれぞれ構成する。なお、以上の説明はあくまで一例であり、発明を解釈する上で、上記の実施形態の構成要素と本発明の構成要素との対応関係に何ら限定されるものではない。   The correspondence between the constituent elements of the claims and the constituent elements of the embodiment is as follows. That is, the temperature sensor 5 constitutes a first temperature detection means, the temperature sensor 6 constitutes a second temperature detection means, and the battery controller 1 constitutes a failure diagnosis means, a clogging determination means, and a temperature calculation means. In addition, the above description is an example to the last, and when interpreting invention, it is not limited to the correspondence of the component of said embodiment and the component of this invention at all.

一実施の形態における温度検出手段の診断装置の構成を示す図The figure which shows the structure of the diagnostic apparatus of the temperature detection means in one embodiment. 一実施の形態における温度検出手段の診断装置によって行われる処理内容を示すフローチャートThe flowchart which shows the processing content performed by the diagnostic apparatus of the temperature detection means in one embodiment モジュールの温度を算出する処理内容を示すフローチャートFlowchart showing processing contents for calculating module temperature

符号の説明Explanation of symbols

１…バッテリコントローラ、２…バッテリファン、３…室内空気温度センサ、４…吸入空気温度センサ、５…バッテリ温度センサ、６…バッテリ温度センサ、７…バッテリパック、８…モジュール、９…ダクト、１０…ダクト、１１…ダクト、１２…吸入口、１３…排出口、１４…電流センサ、１５…回転数センサ、２５，２６…信号線 DESCRIPTION OF SYMBOLS 1 ... Battery controller, 2 ... Battery fan, 3 ... Indoor air temperature sensor, 4 ... Intake air temperature sensor, 5 ... Battery temperature sensor, 6 ... Battery temperature sensor, 7 ... Battery pack, 8 ... Module, 9 ... Duct, 10 ... Duct, 11 ... Duct, 12 ... Suction port, 13 ... Discharge port, 14 ... Current sensor, 15 ... Speed sensor, 25, 26 ... Signal line

Claims (7)

冷媒によって冷却可能な温度検出対象物の温度を検出する温度検出手段の診断装置において、
前記温度検出対象物の各部位のうち、前記冷媒の上流側の部位の温度を検出する第１の温度検出手段と、
前記温度検出対象物の各部位のうち、前記冷媒の下流側の部位の温度を検出する第２の温度検出手段と、
前記冷媒が流れている状態で、前記第１の温度検出手段によって検出される第１の温度と、前記第２の温度検出手段によって検出される第２の温度とに基づいて、前記第１の温度検出手段および前記第２の温度検出手段の短絡故障を検出する故障診断手段とを備えることを特徴とする温度検出手段の診断装置。 In the diagnostic device of the temperature detection means for detecting the temperature of the temperature detection object that can be cooled by the refrigerant
A first temperature detecting means for detecting a temperature of a part upstream of the refrigerant among the parts of the temperature detection object;
A second temperature detecting means for detecting a temperature of a part on the downstream side of the refrigerant among the parts of the temperature detection object;
Based on the first temperature detected by the first temperature detecting means and the second temperature detected by the second temperature detecting means in a state where the refrigerant is flowing, the first temperature A temperature detection means diagnosis apparatus comprising: a temperature detection means; and a failure diagnosis means for detecting a short-circuit failure of the second temperature detection means. 請求項１に記載の温度検出手段の診断装置において、
前記故障診断手段は、前記温度検出対象物が発熱しており、かつ、前記冷媒が流れている状態で、前記第１の温度検出手段によって検出される第１の温度と、前記第２の温度検出手段によって検出される第２の温度とに基づいて、前記第１の温度検出手段および前記第２の温度検出手段の短絡故障を検出することを特徴とする温度検出手段の診断装置。 In the diagnostic device of the temperature detection means according to claim 1,
The failure diagnosis means includes a first temperature detected by the first temperature detection means and the second temperature in a state where the temperature detection object is generating heat and the refrigerant is flowing. A diagnostic device for temperature detection means, comprising: detecting a short-circuit failure between the first temperature detection means and the second temperature detection means based on a second temperature detected by the detection means. 請求項２に記載の温度検出手段の診断装置において、
前記故障診断手段は、前記温度検出対象物の発熱量が所定値以上であり、かつ、前記冷媒が流れている状態で、前記第１の温度検出手段によって検出される第１の温度と、前記第２の温度検出手段によって検出される第２の温度とに基づいて、前記第１の温度検出手段および前記第２の温度検出手段の短絡故障を検出することを特徴とする温度検出手段の診断装置。 In the diagnostic device of the temperature detection means according to claim 2,
The failure diagnosis means has a first temperature detected by the first temperature detection means in a state where the heat generation amount of the temperature detection object is not less than a predetermined value and the refrigerant is flowing, and A temperature detection means diagnosis comprising: detecting a short-circuit failure between the first temperature detection means and the second temperature detection means based on a second temperature detected by the second temperature detection means. apparatus. 請求項１から請求項３のいずれか一項に記載の温度検出手段の診断装置において、
前記冷媒の流路に詰まりが発生していないか判定する詰まり判定手段をさらに備え、
前記故障診断手段は、前記詰まり判定手段によって、前記冷媒の流路に詰まりが発生していないと判定されると、前記前記第１の温度検出手段および前記第２の温度検出手段の短絡故障診断を行うことを特徴とする温度検出手段の診断装置。 In the diagnostic apparatus of the temperature detection means as described in any one of Claims 1-3,
Clogging determination means for determining whether clogging has occurred in the flow path of the refrigerant,
When the clogging determining means determines that the clogging of the refrigerant flow path is not clogged, the failure diagnosing means diagnoses a short circuit failure of the first temperature detecting means and the second temperature detecting means. A diagnostic device for temperature detection means. 請求項１から請求項４のいずれか一項に記載の温度検出手段の診断装置において、
前記故障診断手段は、前記第１の温度検出手段によって検出される第１の温度と、前記第２の温度検出手段によって検出される第２の温度との差の絶対値が所定温度より低ければ、前記第１の温度検出手段および前記第２の温度検出手段が短絡故障していると判定することを特徴とする温度検出手段の診断装置。 In the diagnostic apparatus of the temperature detection means as described in any one of Claims 1-4,
If the absolute value of the difference between the first temperature detected by the first temperature detection means and the second temperature detected by the second temperature detection means is lower than a predetermined temperature, the failure diagnosis means A diagnostic apparatus for temperature detection means, wherein the first temperature detection means and the second temperature detection means determine that a short circuit has occurred. 請求項５に記載の温度検出手段の診断装置において、
前記故障診断手段は、前記第１の温度検出手段によって検出される第１の温度と、前記第２の温度検出手段によって検出される第２の温度との差の絶対値が所定温度より低い状態が所定時間以上継続すると、前記第１の温度検出手段および前記第２の温度検出手段が短絡故障していると判定することを特徴とする温度検出手段の診断装置。 In the diagnostic device of the temperature detection means according to claim 5,
The failure diagnosis means is in a state where the absolute value of the difference between the first temperature detected by the first temperature detection means and the second temperature detected by the second temperature detection means is lower than a predetermined temperature. Is continued for a predetermined time or more, it is determined that the first temperature detecting means and the second temperature detecting means are short-circuited. 請求項１から請求項６のいずれか一項に記載の温度検出手段の診断装置において、
前記第１の温度検出手段および前記第２の温度検出手段の短絡故障が発生していない場合には、前記第１の温度検出手段によって検出される第１の温度および前記第２の温度検出手段によって検出される第２の温度の平均温度を、前記温度検出対象物の温度として算出する温度算出手段をさらに備え、
前記温度算出手段は、前記故障診断手段によって、前記第１の温度検出手段および前記第２の温度検出手段の短絡故障が検出されると、前記第１の温度検出手段によって検出される第１の温度および前記第２の温度検出手段によって検出される第２の温度に基づいて、前記平均温度を推定することを特徴とする温度検出手段の診断装置。 In the diagnostic apparatus of the temperature detection means as described in any one of Claims 1-6,
The first temperature and the second temperature detection means detected by the first temperature detection means when no short-circuit failure has occurred between the first temperature detection means and the second temperature detection means. Temperature calculating means for calculating an average temperature of the second temperatures detected by the temperature detection object as a temperature of the temperature detection object;
When the failure diagnosis unit detects a short-circuit failure between the first temperature detection unit and the second temperature detection unit, the temperature calculation unit detects the first temperature detected by the first temperature detection unit. A diagnostic apparatus for temperature detection means, wherein the average temperature is estimated based on a temperature and a second temperature detected by the second temperature detection means.
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