Temperature sensing device

Abstract

Temperature sensing device (20) with a plurality of sensors (25) designed for temperature sensing, which are in signal communication with an evaluation unit that evaluates the temperature detected by the sensors (25) and which are assigned to at least one of two walls (22, 24) of a mobile carrier (21) arranged at least largely opposite each other and are arranged at a distance from each other, wherein the carrier (21) is designed as a gas-tight hollow body enclosing at least one hollow interior (26) with at least a first wall (24) and a second wall (22), the distance between which can be increased at least partially by increasing the gas pressure prevailing in the hollow interior (26) such that the detection distance of the sensors (25) to a heat-emitting assembly can be adjusted and adapted to an optimized operation that is at least largely free from distortion.that the first wall (24) supporting the sensors (25) can be moved in a precisely controllable vertical direction up to the temperature measuring point, and that the second wall (22), which is opposite the first wall (24) supporting the sensors (25) and designed as a ceiling wall (24), is supported against a fixed support (15), such as a floor (15) outdoors or the floor of a garage or workshop, and is designed as a floor wall (22).

Description

[0001] The invention relates to a temperature sensing device according to claim 1 and a use of the temperature sensing device according to claim 19.

[0002] German patent DE 10 2011 087 747 A1 discloses an energy storage system designed as a so-called traction battery for powering hybrid and electric vehicles, which includes a monitoring device for monitoring the temperature of the battery cells. This monitoring device is intended to detect excessive heating of the energy storage system during charging and discharging at an early stage, in order to prevent irreversible damage from cells exposed to excessively high cell temperatures, as well as the risk of fires and explosions. The known temperature monitoring system is implemented by arranging temperature sensors directly on the storage cells of the energy storage system to record the cell temperature at each cell. The corresponding electrical measurement signals are then transmitted via electrical lines to an evaluation unit for assessment.

[0003] WO 2021 / 074 456 A1 discloses a temperature sensing device designed for installation in a battery cell arrangement, which has a hollow support that can be inflated by means of a cooling medium, to which a carrier for electronic components, such as pressure and temperature sensors, is attached.

[0004] Both the temperature sensing device known from WO 2021 / 074 456 A1 and the cell temperature sensing device for traction batteries known from DE 10 2011 087 747 A1 are not only inflexible, complex, and therefore expensive, but also inoperative in cases where either the evaluation unit and / or the electrical wiring are damaged, e.g., in an accident. If such a malfunction occurs, the cell temperature is uncontrolled. This can also occur in less complex energy storage systems without a temperature monitoring device, such as those used in e-bikes, mobile phones, or similar devices.

[0005] Furthermore, a temperature sensing device is known from German utility model DE 20 2019 005 110 U1, which has already overcome the disadvantages of the prior art known from German patent application DE 10 2011 087 747 A1 and which, among other things, is designed as a mat-like, manually movable carrier. This carrier is equipped with temperature sensors on one of its larger mat surfaces. In practical tests, this known temperature sensing device has already achieved very good temperature detection results, particularly in enclosed spaces, due in particular to its height adjustability.

[0006] The invention is based on the objective of further improving the technology known from the German utility model and providing a temperature sensing device that is even more flexible in its application and at the same time even less sensitive to external influences.

[0007] This problem is solved according to the invention by a temperature sensing device with a plurality of sensors designed for temperature sensing, which are in signal communication with an evaluation unit that evaluates the temperature detected by the sensors, which are assigned to at least one of two walls of a mobile carrier arranged at least largely opposite each other and spaced apart from each other, wherein the carrier is designed as a gas-tight hollow body enclosing at least one hollow interior with at least a first and a second wall, the distance between which can be increased at least partially by increasing the gas pressure prevailing in the hollow interior such that the detection distance of the sensors to the heat-emitting assembly can be adjusted and adapted to an optimized operation that is at least largely free of distortion.that the wall supporting the sensors can be moved vertically in a precisely controllable manner right up to the temperature measuring point, and that the wall opposite the wall supporting the sensors and designed as a ceiling wall is supported against a fixed surface, such as an outdoor floor or the floor of a garage or workshop, and is designed as a floor wall.

[0008] The temperature sensing device according to the invention, which is designed for hand-operated, mobile use and which is equipped with a carrier, in particular a flat profile, which carries the sensor arrangement on one of its larger opposing walls, opens up the possibility, in a simple but functionally reliable way, through the inventive design of the carrier, of adjusting and adapting the detection distance of the sensors to the heat-emitting assembly, such as electrical energy storage devices used in hybrid and electric vehicles, traction batteries with electrochemical battery cells, such as lithium-ion cells, nickel-metal hydride cells or the like, which are predominantly located in the underbody of such vehicles, to an at least largely distortion-free, optimized operation.The adjustable gas- and / or airtight carrier according to the invention prevents external influences that could distort the measurement result, such as sunlight or the like, particularly when measuring temperature outdoors, e.g., in the case of crashed hybrid or electric vehicles, at least to a large extent. This is because the wall of the carrier containing the temperature sensor arrangement can be carefully brought to an optimal distance from the heat-emitting component, such as a traction battery, by increasing the gas and / or air pressure in the hollow body interior using relatively simple means, e.g., by means of a bellows that can be operated independently of a mains electrical supply. This distance is at least largely excluding external influences. The other wall is supported against a stationary support, such as an outdoor floor or the floor of a garage or workshop.The wall of the device, which carries the temperature sensors, can be moved vertically in a precisely controllable manner right up to the temperature measuring point, i.e., the heat-emitting component, namely the traction battery, without posing a risk of damage to the temperature sensors through unintentional contact with the component. The support according to the invention, which is at least mattress-like in design, also offers the simple possibility of dividing the interior of the hollow body into individual, gas- and / or airtight chambers as needed. These chambers can be inflated to varying degrees depending on the height profile of the component being checked for temperature, thus allowing the temperature sensors to be positioned precisely at different height levels of the component. For the purposes of the invention, "gas" also includes air.

[0009] A pressure increase in the interior of a hollow body can be achieved particularly easily using means that are usually available in a cost-effective and quick manner, especially in specialist workshops, such as a mechanically operated bellows or a compressor, if, according to a preferred embodiment of the subject matter of the invention, the hollow body is designed to be airtight and the pressure in the interior of the hollow body is generated by increasing the air pressure prevailing therein.

[0010] According to a further preferred embodiment of the subject matter of the invention, it is provided that the increase in distance between the first wall and the second wall can be generated by wall sections of the hollow body that are at least partially flexible and / or elastic and / or at least fold- and / or wave-like.

[0011] Such a solution allows for not only a power-saving but also a material-conserving increase in the distance between the two walls, even when larger distances between the walls are required for reasons of detection reliability. This is achieved in particular by means of randomly arranged, wave- and / or fold-like wall sections, which only reach their maximum surface dimensions once their fold and / or wave capacity is fully utilized.

[0012] It is understood that the wall structure of the support is designed in such a way that temperature sensing, in particular by the wall carrying the temperature sensors, is not impaired by the waves and / or folds of this wall.

[0013] According to the invention, in particular the non-directional sections of a wall, e.g. lying in waves or folds, provide a supply of available wall surface in order to generate a force- and material-saving increase in the distance between the first and the second wall, i.e. an adjustable detection height.

[0014] According to a further preferred embodiment of the subject matter of the invention, it is provided that at least the first wall carries the sensors and is designed as the top wall of the support, while the second wall is designed as a bottom wall capable of being supported against a stationary support surface.

[0015] By separating the functional aspects of the support walls in this way, their structure and properties can be manufactured in a particularly targeted manner, tailored to specific requirements. For example, the ceiling wall, which supports the temperature sensors, can be made significantly less mechanically stable, robust, and dimensionally rigid than the floor wall, which may come into contact with various surfaces, including outdoors, and therefore needs to be moisture- and water-resistant, and, for workshop use, potentially even oil-resistant. This results in a support for the temperature sensors that is at least largely permanently reliable. Furthermore, the targeted allocation of the temperature sensors to the ceiling wall, and the associated clear identification of the temperature-sensing surface of the support, allows for simple, barrier-free use of such a support.

[0016] According to a preferred embodiment of the subject matter of the invention, the second wall of the hollow body is designed to be at least approximately rigid and inelastic, and the first wall of the hollow body is designed to be at least partially flexible and / or elastic and / or fold- and / or wave-like, with the aid of which the increase in distance can be achieved.

[0017] This support structure allows the temperature sensors, which are supported by the ceiling wall, to be positioned in a particularly simple way on surfaces with different height levels of assemblies intended for temperature measurement, such as those that may be used, for example, in traction batteries of motor vehicles, especially passenger cars, due to space constraints.

[0018] According to an alternative embodiment of the subject matter of the invention, it is provided that the first wall of the hollow body is designed to be at least approximately rigid and inelastic, and that the second wall of the hollow body is designed to be at least partially flexible and / or elastic and / or fold- and / or wave-like, with the help of which the increase in distance can be achieved.

[0019] Such a support structure with a flexurally stable ceiling wall carrying the temperature sensors is particularly suitable for temperature measurement on assemblies with at least largely flat surfaces, such as those formed, for example, by the traction batteries arranged on the underbody of a motor vehicle, in particular a passenger car.

[0020] Both design variants are characterized by the fact that the increased distance is focused on a specific wall of the hollow body. This means that the increased distance can be achieved not only through the appropriate material selection for the wall but also through its design. Depending on the application, the top or bottom wall can, for example, be designed to be more elastic, thinner, and less flexible, and / or with waves or folds, than the corresponding other wall of the beam. In particular, the waves or folds provide a reserve of surface area to create a force- and material-efficient increase in the distance between the first and second walls, thus enabling height adjustment.This different design of the two walls allows the temperature sensors to be positioned with less force and simultaneously with less mechanical stress on the substrate material, achieving an optimal detection distance. The rigid wall can also be designed to be pressure- and abrasion-resistant, and thus mechanically robust, depending on the requirements.

[0021] The support for the temperature sensing device is particularly flexible in the case of different requirement criteria, such as a different height level of the support surface with a simultaneously different surface height level of the assembly intended for temperature sensing, if, according to a further alternative embodiment of the subject matter of the invention, it is provided that both the first wall and the second wall are at least largely flexible and / or elastic and / or fold- and / or wave-like and the increase in distance is generated by both walls.

[0022] With such a carrier structure, even particularly large distances between the support surface of the carrier and the temperature sensing surface of the heat-emitting assembly, as can occur with traction batteries installed in so-called SUVs, can be achieved in a power-saving and carrier material-friendly manner.

[0023] According to a particularly preferred embodiment of the subject matter of the invention, it is provided that the first wall and the second wall are connected to each other by a side wall, which together enclose the interior of the hollow body, and that the first wall, the second wall and the side wall are designed to be flexible and / or elastic and / or fold- and / or wave-like, and that the increase in distance is generated by all walls.

[0024] Such a beam, due to its uniform material composition, is particularly easy to manufacture and therefore cost-effective. Furthermore, the elastic and flexible design of the top and bottom walls, combined with a side wall exhibiting the same or similar structural and material properties, allows the use of more cost-effective beam materials to achieve at least the same structural properties as those attainable with an elastic and flexible design of either the top or bottom wall, or even with both walls being elastic and flexible. This type of beam is also particularly suitable for bridging large height differences between the support surface and the assembly intended for temperature measurement.

[0025] A temperature sensing device, in particular its carrier, can be manufactured particularly cost-effectively in various designs and is durable depending on the use of the appropriate plastic material, if, according to a particularly preferred embodiment of the subject matter of the invention, it is provided that the first wall and the second wall as well as the side wall of the carrier are made of plastic, in particular PVC or EPDM or a Hypalon-neoprene mixture.

[0026] According to a further preferred embodiment of the subject matter of the invention, it is provided that at least one valve, in particular a check valve, is provided in at least one of the walls for increasing and decreasing the pressure in the interior of the hollow body.

[0027] This allows for a particularly functional and precise adjustment of the distance between the ceiling and floor walls of the support.

[0028] A temperature detection device is particularly adaptable to different temperature detection heights on the underbody of a motor vehicle if, according to a further preferred embodiment of the subject matter of the invention, the hollow interior of the carrier is divided into at least two gas- and / or airtight chambers, each of which is assigned at least one valve, in particular a check valve, for increasing and decreasing the pressure prevailing in these chambers.

[0029] A temperature sensing device is particularly barrier-free, without the need for separate marking of the wall of the carrier suitable for temperature sensing, if, according to a further preferred embodiment of the subject matter of the invention, it is provided that both the first and the second wall of the hollow body are equipped with sensors.

[0030] According to a further preferred embodiment of the subject matter of the invention, it is provided that the sensors are supported by the respective wall in such a way that the sensors, in particular their sensor surface, are protected from mechanical damage, but the sensors are preferably embedded in the wall at a distance from the surface.

[0031] Such a protective measure for the temperature sensors enables the temperature sensing device to be used extensively without the risk of damaging the temperature sensors.

[0032] According to a further advantageous embodiment of the subject matter of the invention, it is provided that the first wall and the second wall have a surface dimension of 1.5m x 1.0m, but preferably a surface dimension of 1.0m × 1.0m, and that the side wall has a length of 1.0m to 1.5m and a width of 0.2m to 0.6m, but preferably a width of 0.4m.

[0033] With such surface dimensions for the first and second walls of the temperature sensing device's support structure, reliable operation is achieved not only for the wall used for temperature detection but also for the opposing wall, which serves as a bearing surface against a support substrate. This is because these wall dimensions of the wall supporting the temperature sensors enable a sensor arrangement that, on the one hand, allows for comprehensive temperature measurement of the heat-emitting component, such as a vehicle's traction battery or similar, and, on the other hand, ensures stable positioning. In conjunction with the side wall dimensions, a particularly large degree of height adjustability is also possible.

[0034] According to a further particularly preferred embodiment of the subject matter of the invention, it is provided that the majority of the sensors are designed as sensors capable of detecting the temperature without contact and that their measuring areas form a sensing surface whose size corresponds at least almost to the area of ​​the wall on which they are supported.

[0035] The use of non-contact temperature sensors, particularly in conjunction with the inventive design of the carrier for the temperature sensing device, makes it possible to utilize the detection setting achievable by increasing the internal pressure of the hollow body only to the extent necessary to ensure at least a largely reliable elimination of external influences that could distort the temperature measurement results, such as, in particular, solar radiation.

[0036] According to an alternative embodiment of the subject matter of the invention, it is provided that the majority of the sensors are designed as sensors capable of detecting the temperature by contact and that their measuring areas form a sensing surface whose size corresponds at least approximately to the area of ​​the wall on which they are supported.

[0037] The inventive design of the support for the temperature sensing device, with its uncomplicated height adjustability of the detection surface, makes the use of such temperature sensors attractive. While it is necessary to position the support wall carrying the temperature sensors at least in the immediate vicinity of the surface of the assembly intended for temperature detection, such as a traction battery for a motor vehicle, this requirement makes it highly likely that the aforementioned external influences, which can distort the temperature measurement results, will be reliably avoided.

[0038] A particularly high level of detection reliability for the temperature detection device according to the invention, in particular due to the particularly easy height adjustment of its wall used for temperature detection, is achieved if, according to a further preferred embodiment of the subject matter of the invention, it is provided that the sensing surface is formed by an at least approximately seamless transition between the measuring areas of the sensors.

[0039] The transmission of signals emitted by the temperature sensors is particularly timely and effective if, according to a further advantageous embodiment of the subject matter of the invention, the sensors are electrically connected to each other in series and each of the sensors is connected to the evaluation unit.

[0040] According to a particularly preferred, cost-saving and efficient embodiment of the subject matter of the invention, the evaluation unit is connected to the sensors via a CAN bus for data transmission.

[0041] A particularly high accuracy standard with regard to the recorded temperature signals on the one hand and at the same time a high safety standard in the transmission of alarm signals on the other hand to the group of persons relevant to the alarm signal on the other hand is achieved if, according to a further preferred embodiment of the subject matter of the invention, it is provided that the evaluation unit is designed to transmit an alarm signal, in particular an SMS, to a display device, in particular a mobile phone.

[0042] A particularly high safety standard for the local environment surrounding the temperature-measuring object is achieved if, according to a further advantageous embodiment of the invention, the carrier is equipped with a power supply for providing the evaluation unit with electrical energy. Due to the power supply assigned to the carrier, the temperature sensing device can be operated independently of a mains power supply, and thus also remotely from inhabited and uninhabited buildings.

[0043] A particularly advantageous and safety-relevant use of the temperature sensing device arises especially for its application in measuring the temperature of an electrical energy storage device based on electrochemical battery cells, such as lithium-ion cells, nickel-metal hydride cells, or the like, particularly when these are used as traction batteries in an electrically powered motor vehicle, such as a hybrid or electric vehicle, especially such a passenger car or SUV, if, according to the subject matter of the invention, the temperature sensing device is used to measure the temperature of a battery for the propulsion of a motor vehicle, especially a passenger car or SUV. With the use of the temperature sensing device according to the invention, dangerous temperature profiles of the so-called... can be measured with high accuracy.To detect continuously tilting traction batteries, such as can occur in an electric / or hybrid vehicle involved in an accident or during the charging process of the traction battery for such a vehicle, and thus initiate hazard mitigation at an early stage.

[0044] The invention is explained in the following description with reference to a simplified embodiment shown in the accompanying drawing. The drawing shows: Fig. 1: In simplified schematic representation, a passenger car in side view with a temperature detection device arranged under its underbody, Fig. 2: simplified schematic section of the temperature detection device with matrix-like temperature sensors arranged on the ceiling wall of its support in a top view, Fig. 3: In simplified schematic representation, a section of the temperature detection device in longitudinal section according to Fig. 2 in a swollen state and Fig. 4: In simplified schematic representation, a section of the temperature detection device in longitudinal section according to Fig. 2 in the flaccid state.

[0045] According to Fig. Figure 1 shows an electrically powered motor vehicle 10, designed in this case as a passenger car, with an underbody 11 in which a recess 12 (not visible in this case) is provided for mounting an electrical energy storage device 13 (also not visible), such as a lithium-ion battery, for powering the motor vehicle 10. The motor vehicle 10 rests on wheels 14 on a floor 15, on which a support 21 belonging to a temperature sensing device 20, designed in this case as an airtight hollow body, rests. The support 21 of the temperature sensing device 20, which is shown in this case in a ready-to-use state, can be moved and positioned freely by hand along the floor 15, i.e., it is mobile and not fixed in position, and has a bottom wall 22 that rests against the floor 15.In the present case, a side wall 23, running along the lateral edges of the floor wall 22 and airtightly connected to the floor wall 22, serves to provide an airtight connection to a ceiling wall 24, which together with the walls 22 and 23 form the body of the support 21. As shown in particular... Fig. Figure 2 shows that the ceiling wall 24 carries temperature sensors 25, which in this case operate in contact and, due to their arrangement and individual measuring ranges, form a total coverage area extending at least almost across the entire surface of the ceiling wall 23. These sensors are capable of detecting the heat emitted during the charging process of the energy storage device 13 or an energy storage device 13 damaged by an accident. Based on the detected temperature, the temperature sensors 25 generate signals that are fed to and evaluated by an electronic evaluation unit (not shown). If the energy storage device 13 reaches a critical temperature state, the evaluation unit can, depending on requirements, generate an audible alarm signal and / or send an alarm signal to a mobile phone monitored by a professionally authorized or private individual.

[0046] The temperature sensors 25, which by their arrangement form at least a largely uniform sensing surface, are, according to the present embodiment, protected against unintentional mechanical damage, such as that caused in particular by Fig. As can be seen in Figure 3, it is embedded and integrated into the ceiling wall 24. This, together with the floor wall 22 and the side wall 23, encloses a cavity 26 which in this case is airtight and is created by the single-material connection of the walls 22, 23 and 24, which are made of, for example, PVC or EPDM.

[0047] Fig. Figure 3 shows the cavity 26 in its inflated operating state, whereby the walls 22 to 24 are essentially free of wrinkles and / or waves, and whereby the bottom wall 22 is supported by the base 15 and the top wall extends at least to the immediate vicinity of the subfloor 11. According to the present embodiment of the support 21, the cavity 26 is divided by partitions 27 into three chambers 28 of approximately equal volume and airtightly separated from one another, each of which is shown in its inflated state. Each of these chambers 28 is associated with a check valve (not shown), for example, integrated in the side wall 23, which can be connected to a valve connection of air compression devices, such as tire inflators, air compressors, or the like, to increase or decrease the air pressure in the chambers 28.

[0048] According to Fig. Figure 4 shows the support 21 in its relaxed, unpressurized, out-of-service state. In this state, all its walls 22 to 24 exhibit a kind of wave and / or fold formation, which is successively eliminated with an increase in pressure in the chambers 28, particularly in combination with the elastic material behavior of the wall material, as shown in particular Fig. 3 shows.

Claims

[1] Temperature sensing device (20) with a plurality of sensors (25) designed for temperature sensing, which are in signal communication with an evaluation unit which evaluates the temperature detected by the sensors (25) and which are assigned to at least one of two walls (22, 24) of a mobile carrier (21) arranged at least largely opposite each other and are arranged at a distance from each other, wherein the carrier (21) is designed as a gas-tight hollow body enclosing at least one hollow interior (26) with at least a first wall (24) and a second wall (22), the distance between which can be increased at least partially by increasing the gas pressure prevailing in the hollow interior (26) such that the detection distance of the sensors (25) to a heat-emitting assembly can be adjusted and adapted to an optimized operation that is at least largely free from distortion.that the first wall (24) supporting the sensors (25) can be moved in a precisely controllable vertical direction up to the temperature measuring point, and that the second wall (22), which is opposite the first wall (24) supporting the sensors (25) and designed as a ceiling wall (24), is supported against a fixed support (15), such as a floor (15) outdoors or the floor of a garage or workshop, and is designed as a floor wall (22). [2] Temperature sensing device (20) according to claim 1, characterized by , that the hollow body is airtight and the pressure inside the hollow body (26) is generated by increasing the air pressure prevailing therein. [3] Temperature sensing device (20) according to claim 1 or 2, characterized by, that the increase in distance between the first wall (24) and the second wall (22) can be generated by wall sections of the hollow body that are at least partially flexible and / or elastic and / or at least fold- and / or wave-like. [4] Temperature sensing device (20) according to any one of claims 1 to 3, characterized by , that the second wall (22) of the hollow body is designed to be at least approximately rigid and inelastic, and that the first wall (24) of the hollow body is designed to be at least partially flexible and / or elastic and / or fold- and / or wave-like, with the help of which the increase in distance can be achieved. [5] Temperature sensing device (20) according to one of claims 1 to 3, characterized by, that the first wall (24) of the hollow body is designed to be at least approximately rigid and inelastic, and that the second wall (22) of the hollow body is designed to be at least partially flexible and / or elastic and / or fold- and / or wave-like, with the help of which the increase in distance can be achieved. [6] Temperature sensing device (20) according to one of claims 1 to 3, characterized by , that both the first wall (24) and the second wall (22) are at least largely flexible and / or elastic and / or fold- and / or wave-like and the increase in distance is produced by both walls (22,24). [7] Temperature sensing device (20) according to one of claims 1 to 3, characterized by, that the first wall (24) and the second wall (22) are connected to each other by a side wall (23) and together enclose the interior of the hollow body (26) and that the first wall (24), the second wall (22) and the side wall (23) are flexible and / or elastic and / or fold- and / or wave-like and the increase in distance is produced by all walls (22,23,24). [8] Temperature sensing device (20) according to any one of claims 1 to 7, characterized by , that the first wall (24) and the second wall (22) of the mobile support (21) designed as a hollow body are made of plastic, in particular PVC or EPDM or a Hypalon-neoprene mixture, or that the first wall (24) and the second wall (22) as well as the side wall (23) of the mobile support (21) designed as a hollow body are made of plastic, in particular PVC or EPDM or a Hypalon-neoprene mixture. [9] Temperature sensing device (20) according to one of claims 7 or 8, characterized by , that at least one valve for increasing and decreasing the pressure in the interior of the hollow body (26) is provided in at least one of the walls (22,23,24). [10] Temperature sensing device (20) according to any one of claims 1 to 9, characterized by , that the interior of the hollow body (26) of the mobile carrier (21) is divided into at least two gas- or airtight chambers (28) separated from each other, each of which has at least one valve for increasing and decreasing the pressure prevailing in these chambers (28). [11] Temperature sensing device (20) according to any one of claims 1 to 10, characterized by , that both the first wall (24) and the second wall (22) of the mobile carrier (21) designed as a hollow body is equipped with sensors (25). [12] Temperature sensing device (20) according to claim 11, characterized by, that the sensors (25) are supported by the respective wall (22,24) in such a way that the sensors (25), in particular their sensor surface, are protected from mechanical damage, but the sensors (25) are preferably embedded in the surface of the wall (22,24) recessed towards it. [13] Temperature sensing device (20) according to any one of claims 1 to 12, characterized by , that the first wall (24) and the second wall (22) have a surface dimension of 1.5m × 1.0m, preferably, however, a surface dimension of 1.0m × 1.0m, and that the side wall (23) has a length of 1.0m to 1.5m and a width of 0.2m to 0.6m, preferably, however, a width of 0.4m. [14] Temperature sensing device (20) according to any one of claims 1 to 13, characterized by, that the majority of the sensors (25) are designed as non-contact sensors (25) capable of detecting the temperature and their measuring areas form a sensing surface whose size corresponds at least almost to the area of ​​the wall (22,24) on which they are supported. [15] Temperature sensing device (20) according to any one of claims 1 to 13, characterized by , that the majority of the sensors (25) are designed as touch sensors capable of detecting the temperature and their measuring areas form a sensing surface whose size corresponds at least nearly to the area of ​​the wall (22,24) on which they are supported. [16] Temperature sensing device (20) according to one of claims 14 or 15, characterized by , that the touch surface is formed by an at least approximately seamless transition between the measuring areas of the sensors (25). [17] Temperature sensing device (20) according to any one of claims 1 to 16, characterized bythat the evaluation unit is designed to transmit an alarm signal, in particular an SMS, to a display device, in particular a mobile phone. [18] Temperature sensing device (20) according to any one of claims 1 to 17, characterized by , that the mobile carrier (21) is equipped with a power supply to provide the evaluation unit with electrical energy. [19] Use of a temperature sensing device (20) according to any one of claims 1 to 18 for sensing the temperature of a battery (12) for the propulsion of a motor vehicle (10), in particular a passenger car or an SUV.

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