Temperature sensorTechnical field
The present invention relates to and a kind ofly measure the temperature sensor of the temperature of this measuring object near measuring object.
Background technology
Generally, in the inside of automobile etc., be equipped with multiple temperature sensor to detect the temperature in each portion.Such as, assemble in the assembled battery of multiple cell piece (monocell) at the accumulator as hybrid vehicle or electric motor car etc., in order to measure the temperature of each cell piece, corresponding Individual cells sheet configures multiple temperature sensor.
In addition, it is also known that following technology: measure Temperature Distribution in the unit of assembled battery after mounting, and the maximum and minimum position of specified temp, estimate Temperature Distribution thus and to go forward side by side line pipe reason.
In the past, such as in patent documentation 1, propose following technology: in the assembled battery of the multiple cell piece of assembling, configure multiple temperature sensor to detect the temperature of the cell piece that temperature is the highest in the temperature of the minimum cell piece of temperature in upstream extremity and downstream end at the upstream extremity of cooling air and downstream end.The temperature sensor of such installation, used sensor wire being connected to thermistor in the past.
Patent documentation 1: Japanese Patent Publication 2004-135424 publication (paragraph sequence number 0017, Fig. 3)
In above-mentioned conventional art, leave following problem.
In the past, the maximum point of temperature and smallest point is obtained according to actual measurement and in the method for its position configuration temperature sensor not carrying out the monitoring temperature of Individual cells sheet, in order to the Temperature Distribution of discrete cell under the state of final product structure, need to test etc. in advance.At this moment, the deterioration state according to cell piece likely changes significantly from initial temperature distribution, is difficult to long-time high precision and stably manages temperature.Therefore, still expect to carry out other temperature measuring with each temperature sensor respectively to Individual cells sheet.
But, at this moment need multiple temperature sensor to be fixedly installed on Individual cells sheet with adherence state, there is installation and operate problem points that is bothersome and installation workload increase.And due to wire is connected to thermistor, therefore there is the coupling part of weight increase or wire and the thermistor caused by wire because vibrating the problems such as deterioration in mounted temperature sensor in the past.
In addition, require the unit small-sized of assembled battery, while miniaturized components density uprises, the space of configuration temperature sensor narrows, very difficult setting temperature sensor in the past.
Summary of the invention
The present invention completes in view of aforementioned problems, its object is to, and provides a kind of temperature sensor, and it is lightweight and slim, while installation and resistance to vibration excellence, even if there is position deviation a little also correctly can measure temperature.
The present invention have employed following structure to solve described problem.That is, temperature sensor of the present invention, is characterized in that, has: insulativity film; The thermal sensing element of film-form, is arranged on this insulativity film; Conductive wires film, pattern to be formed on described insulativity film and to be connected to described thermal sensing element; And infrared absorbing film, directly or by insulativity pellicular cascade described thermal sensing element straight above, described temperature sensor entirety becomes the film-form or band shape that are made up of multilayer film stacked.
In this temperature sensor, owing to having film-form or laminal thermal sensing element, wiring film and infrared absorbing film on insulativity film, therefore overallly the film-form or band shape that are made up of multilayer film stacked is become, lightweight and slim, there is flexibility, easily can be installed on the various position such as narrow space or bending space.Especially, after the unit etc. of assembling assembled battery, still can easily be arranged in the gap of predetermined position etc.That is, also can be inserted in the unit etc. of assembled battery in preventing the clearance portion of stagnant heat from grading, therefore can first determining means shape of product, design or trial production workload can also be alleviated.
In addition, thermal sensing element measures temperature according to the infrared ray absorbing based on infrared absorbing film, even if the contact therefore not carrying out being pasted on measuring object etc. is fixed, as long as be arranged near state, even if then the position deviation produced a little also correctly can measure temperature, alleviate installation operation and installation workload.That is, even if change a little with the distance of measuring object when arranging, also infrared ray based on the radiation from measuring object can fully be absorbed, therefore, it is possible to precision carries out temperature measuring well by infrared absorbing film.In addition, even if there is inclination a little or crooked when arranging, as long as within the scope of the field angle that detects at infrared absorbing film middle infrared (Mid-IR) of measuring object, just precision temperature measuring can be carried out well.
And, do not adopt wire as distribution, but adopt the wiring film being formed into integration on insulativity film with pattern, therefore, it is possible to suppress the increase of weight, improve the resistance to vibration of distribution.
In addition, temperature sensor of the present invention, is characterized in that, described thermal sensing element is the thin-film thermistor element of film forming on described insulativity film.
That is, in this temperature sensor, thermal sensing element is the thin-film thermistor element of film forming on insulativity film, therefore can make the thermal sensing element thinner than chip thermistor, as a whole can be more lightweight and slim, has flexibility.
In addition, temperature sensor of the present invention, is characterized in that, described thermal sensing element is arranged at the multiple positions on described insulativity film.
Namely, in this temperature sensor, the multiple positions on insulativity film are arranged at due to thermal sensing element, therefore be arranged on same insulativity film by the number of measuring point and multiple thermal sensing elements of position will be corresponded to, can by the temperature of 1 multiple position of temperature sensor measurement or multiple measuring object.Especially, in assembled battery be made up of multiple cell piece etc., while also can measuring the temperature of multiple Individual cells sheet respectively with 1 temperature sensor, without the need to carrying out indivedual distribution on each Individual cells sheet, installation operation becomes and is more prone to, and installation workload also can significantly be cut down.
And temperature sensor of the present invention, is characterized in that, in multiple described thermal sensing element, at least one is the temperature compensation element not being laminated with described infrared absorbing film.
That is, in this temperature sensor, because in multiple thermal sensing element, at least one is the temperature compensation element not being laminated with infrared absorbing film, therefore temperature compensation element can be used as the reference measuring atmosphere temperature around.Therefore, the accuracy of detection of other thermal sensing element middle infrared (Mid-IR)s can be improved according to the detection relative value of temperature compensation element and other thermal sensing elements.
In addition, temperature sensor of the present invention, is characterized in that, at the opposing face being laminated with the face of described infrared absorbing film of described thermal sensing element, to have directly or by the infrared reflection film of insulativity pellicular cascade.
Namely, in this temperature sensor, due to the opposing face being laminated with the face of infrared absorbing film at thermal sensing element, have directly or by the infrared reflection film of insulativity pellicular cascade, therefore, can be cut down by the interference caused from the infrared ray beyond measuring object by infrared reflection film, and can more high-precision temperature measuring be carried out.
In addition, temperature sensor of the present invention, is characterized in that, described thermal sensing element and described wiring film are clipped in insulativity film described in a pair.
That is, in this temperature sensor, because thermal sensing element and wiring film are clamped by a pair insulativity film, therefore, thermal sensing element and wiring film can not expose, and while can protecting them, improve the resistance to vibration of distribution further with insulativity film.
In addition, temperature sensor of the present invention, is characterized in that, described insulativity film is formed by infrared transmitting film.
Namely, in this temperature sensor, because insulativity film is formed by infrared transmitting film, therefore, it is possible to do one's utmost to suppress the infrared ray absorbing by the insulativity film around infrared absorbing film self, reduce the phenomenon because affecting thermal sensing element from the heat transfer of surrounding.
Invention effect
Following effect is obtained according to the present invention.
Namely, according to temperature sensor involved in the present invention, owing to having film-form or laminal thermal sensing element, wiring film and infrared absorbing film on insulativity film, therefore lightweight and slim, while installation and resistance to vibration excellence, even if there is position deviation a little also correctly can measure temperature.Thus, in the unit of assembled battery, also can insert temperature sensor of the present invention between narrow cell piece and while arranging, can with 1 temperature sensor respectively correctly and long-term and stably temperature measuring is carried out to multiple Individual cells sheet.
Accompanying drawing explanation
Fig. 1 is the sectional view of the 1st embodiment representing temperature sensor involved in the present invention.
Fig. 2 is the vertical view representing temperature sensor in the 1st embodiment.
Fig. 3 is the vertical view of the 2nd embodiment representing temperature sensor involved in the present invention.
Fig. 4 is the key diagram representing the temperature measuring multiple cell piece and the temperature sensor arranged in the 2nd embodiment.
Fig. 5 is the vertical view of the 3rd embodiment representing temperature sensor involved in the present invention.
Fig. 6 is the vertical view of other examples represented in the 3rd embodiment of temperature sensor involved in the present invention.
Symbol description
1,21,31,41-temperature sensor, 2A-the 1st insulativity film, 2B-the 2nd insulativity film, 3-thermal sensing element, 3H-temperature compensation element, 4-wiring film, 5-infrared absorbing film, 6-infrared reflection film, S-cell piece (measuring object)
Embodiment
Below, the 1st embodiment of temperature sensor involved in the present invention is described with reference to Fig. 1 and Fig. 2.In addition, in each figure of following explanation, in order to the size each unit being set to identifiable design or easily identification suitably changes engineer's scale.
As shown in Figures 1 and 2, the temperature sensor 1 of present embodiment is the sensor such as the cell piece S of the assembled battery of formation hybrid vehicle or electric motor car etc. being measured its temperature as measuring object, and it is arranged with the state near cell piece S.
This temperature sensor 1 has the 1st insulativity film 2A of rectangle band shape and the 2nd insulativity film 2B, be arranged at film-form on the 1st insulativity film 2A or laminal thermal sensing element 3, be formed at patterns such as Copper Foils on the 1st insulativity film 2A and be connected to the pair of conductive wiring film 4 of thermal sensing element 3 and be layered in the infrared absorbing film 5 of the straight top of thermal sensing element 3 by the 2nd insulativity film 2B.
In addition, this temperature sensor 1 has the opposing face being laminated with the face of infrared absorbing film 5 at thermal sensing element 3 by the stacked infrared reflection film 6 of the 1st insulativity film 2A.That is, in the straight below of thermal sensing element 3, namely the opposing face (rear side of the 1st insulativity film 2A) being provided with the face of thermal sensing element 3 of the 1st insulativity film 2A is provided with infrared reflection film 6.
Above-mentioned 2nd insulativity film 2B is pasted on the 1st insulativity film 2A with the state of clamping thermal sensing element 3 and wiring film 4 between the 1st insulativity film 2A.That is, thermal sensing element 3 and wiring film 4 are clamped by a pair insulativity film.In addition, these the 1st insulativity film 2A and the 2nd insulativity film 2B are formed by infrared transmitting film.In addition, in present embodiment, the 1st insulativity film 2A and the 2nd insulativity film 2B is formed by polyimide resin sheet.
Above-mentioned thermal sensing element 3 can adopt thin-film thermistor element or laminal chip thermistor.In present embodiment, adopt following thin-film thermistor element as thermal sensing element 3: possess such as by Mn-Co system composite metal oxide (such as Mn3o4-Co3o4be composite metal oxide) or in Mn-Co system composite metal oxide, comprise composite metal oxide (the such as Mn of at least one of Ni, Fe, Cu3o4-Co3o4-Fe2o3be composite metal oxide) the composite metal oxide film (thermistor thin film) that forms and to be formed on this composite metal oxide film and to be connected to the resistance measurement metal electrodes such as the comb poles of wiring film 4 (diagram is omitted).
Above-mentioned infrared absorbing film 5 is formed by the material had higher than the infrared ray absorbing rate of the 2nd insulativity film 2B, such as, formed by the film or infrared ray-absorbable glass-film (Pyrex (borosilicateglass) film etc. containing 71% silicon dioxide) that comprise the infrared absorbing materials such as carbon black.That is, the infrared ray based on the radiation from cell piece S is absorbed by this infrared absorbing film 5.And, by from absorbing the heat transfer of ultrared infrared absorbing film 5 by the 2nd insulativity film 2B, the temperature of the thermal sensing element 3 of straight below is changed.This infrared absorbing film 5 is formed as covering this thermal sensing element less times greater than the size of thermal sensing element 3.
Above-mentioned infrared reflection film 6 is formed by the material had lower than the infrared emission rate of the 1st insulativity film 2A, such as, formed by the aluminium-vapour deposition film or aluminium foil etc. of minute surface.This infrared reflection film 6 is formed as covering them with the size less times greater than thermal sensing element 3 and infrared absorbing film 5.
So, the temperature sensor 1 of present embodiment owing to having film-form or laminal thermal sensing element 3, wiring film 4 and infrared absorbing film 5 on the 1st insulativity film 2A, therefore overallly the film-form or band shape that are made up of multilayer film stacked is become, lightweight and slim, there is flexibility, can easily install at multiple positions such as narrow space or bending spaces.Especially, even if after the unit etc. of assembling assembled battery, the gap etc. of predetermined position can be also easily arranged at.That is, also can being inserted in for preventing the clearance portion of stagnant heat from grading in the unit etc. of assembled battery, the shape of product of unit can be predetermined thus, design or trial production workload can also be alleviated.
In addition, as thermal sensing element 3 by adopting thin-film thermistor element, the thermal sensing element thinner than chip thermistor therefore can be made, as a whole can be more lightweight and slim, there is flexibility.
In addition, because thermal sensing element 3 measures temperature according to the infrared ray absorbing based on infrared absorbing film 5, even if the contact therefore not carrying out being pasted on measuring object cell piece S etc. is fixed, as long as be arranged near state, even if then the position deviation produced a little also correctly can measure temperature, alleviate installation operation and installation workload.That is, even if change a little with the distance of measuring object cell piece S when arranging, the abundant infrared ray absorbed based on the radiation from cell piece S of infrared absorbing film 5 can also be used, therefore, it is possible to precision carries out temperature measuring well.
And, do not adopt wire as distribution, but adopt the wiring film 4 being formed into integration on the 1st insulativity film 2A with pattern, therefore, it is possible to suppress the increase of weight, improve the resistance to vibration of distribution.
In addition, at the opposing face being laminated with the face of infrared absorbing film 5 of thermal sensing element 3, have by the stacked infrared reflection film 6 of the 1st insulativity film 2A, therefore, can be cut down by the interference caused from the infrared ray beyond measuring object cell piece S by infrared reflection film 6, and can more high-precision temperature measuring be carried out.In addition, when protecting the rear side of temperature sensor 1 with casing etc., this infrared reflection film 6 can also be removed.
In addition, because thermal sensing element 3 and wiring film 4 are clamped by the 1st insulativity film 2A and the 2nd insulativity film 2B, therefore, thermal sensing element 3 and wiring film 4 can not expose, and while can protecting them, improve the resistance to vibration of distribution further with insulativity film.
Then, referring to Fig. 3 to Fig. 5, the 2nd embodiment of temperature sensor involved in the present invention and the 3rd embodiment are described.In addition, in the following description of the embodiment, to adding prosign with the same inscape that illustrates in above-mentioned embodiment and the description thereof will be omitted.
The difference of the 2nd embodiment and the 1st embodiment is as follows: in the 1st embodiment, only possess 1 thermal sensing element 3, on the contrary, as shown in Figures 3 and 4, in the temperature sensor 21 of the 2nd embodiment, thermal sensing element 3 is arranged at the multiple positions on the 1st insulativity film 2A.
Namely, in the temperature sensor 21 of the 2nd embodiment, as shown in Figure 4, when measuring object cell piece S is such as arranged with 4, as shown in Figure 3,4 separated from each other predetermined spaces of the corresponding each cell piece S of thermal sensing element 3 are arranged in row and are formed on the 1st insulativity film 2A of rectangle band shape.In addition, each thermal sensing element 3 is connected to a pair wiring film 4.Therefore, on the 1st insulativity film 2A, pattern is formed with 4 pairs of wiring films 4.
So, in the temperature sensor 21 of the 2nd embodiment, because thermal sensing element 3 is arranged at the multiple positions on the 1st insulativity film 2A, therefore by by being arranged on same 1st insulativity film 2A corresponding to the number of measuring point and multiple thermal sensing elements 3 of position, the temperature of multiple position or multiple measuring object can be measured with 1 temperature sensor 21.Namely, even if be the assembled battery be made up of multiple cell piece S, while also can measuring the temperature of multiple Individual cells sheet S respectively with 1 temperature sensor 21, without the need to carrying out indivedual distribution at each Individual cells sheet S, installation operation becomes easier, and installation workload also can significantly be cut down.
In addition, as shown in Figure 4, can temperature sensor 21 be inserted in the gap of multiple cell piece S arranged side by side and casing C and arrange, even if there is inclination a little or crooked during set temperature sensor 21, as long as within the scope of the field angle that cell piece S detects at infrared absorbing film 5 middle infrared (Mid-IR), just precision temperature measuring can be carried out well.
Further, by adopting the thermal sensing element 3 of thin-film thermistor element, because thermal sensing element 3 is membranaceous, the interelement sectional area producing temperature difference can be reduced, therefore not easily to other thermal sensing element 3 heat conduction formed on same film.Therefore, from other parts interference less and detection sensitivity improve.
Then, the difference of the 3rd embodiment and the 2nd embodiment is as follows: in the 2nd embodiment, whole thermal sensing element 3 detects the temperature of each self-corresponding each cell piece S, in the temperature sensor 31 of contrary 3rd embodiment as shown in Figure 5, in multiple thermal sensing element 3 one be the temperature compensation element 3H not being laminated with infrared absorbing film 5 and infrared reflection film 6.
Namely, in the temperature sensor 31 of the 3rd embodiment, 1 in 4 thermal sensing elements 3 becomes and is not clipped between infrared absorbing film 5 and infrared reflection film 6, but measures the temperature compensation element 3H of the atmosphere temperature of surrounding between the 1st insulativity film 2A and the 2nd insulativity film 2B.
Like this, in the 3rd embodiment, because in multiple thermal sensing element 3 is the temperature compensation element 3H not being laminated with infrared absorbing film 5 and infrared reflection film 6, therefore, it is possible to temperature compensation element 3H is used as the reference measuring surrounding atmosphere temperature.Therefore, the ultrared accuracy of detection in other thermal sensing elements 3 can be improved according to the detection relative value of temperature compensation element 3H and other thermal sensing elements 3.
In addition, as shown in Figure 6, as other examples of the 3rd embodiment, also can be set to referential temperature compensation element 3H straight above form the temperature sensor 41 of infrared reflection film 6.At this moment, because available infrared reflection film 6 reflected illumination is in the infrared ray from cell piece S of temperature compensation element 3H, therefore sensitivity improves further.
In addition, technical scope of the present invention is not limited to the respective embodiments described above, can add various change without departing from the spirit and scope of the present invention.
Such as above-mentioned, although preferably clamp thermal sensing element and wiring film by the 1st insulativity film and the 2nd insulativity film 2, also thermal sensing element and wiring film can be formed in the one side of a slice insulativity film.
In addition, in above-mentioned embodiment, by insulativity film thermal sensing element straight above form infrared absorbing film, but if can insulativity be guaranteed between thermal sensing element, then also can be formed directly into above thermal sensing element.And, form infrared reflection film by insulativity film in the straight below of thermal sensing element, but if can insulativity be guaranteed between thermal sensing element, then also can be formed directly into below thermal sensing element.