Method and apparatus for detecting when a predefined temperature threshold is exceeded

Abstract

A device and method for detecting when at least one heat source exceeds a temperature threshold, the device comprising: a component whose resistance varies according to the operating temperature of the component; and a power source adapted to supply current to the component. The component can be thermally coupled to the heat source such that the operating temperature varies according to the temperature of the heat source and the heat released in the component due to the Joule effect. If the operating temperature is greater than a trigger threshold, the variable resistance has a high value. The power source is configured to generate the current such that once the temperature of the heat source is greater than or equal to the temperature threshold, the operating temperature is greater than or equal to the trigger threshold, and thus the variable resistance has the high value. The power source is a current source, and the current is supplied in the form of periodic pulses having a fixed duty cycle or a variable duty cycle.

Description

Technical Field

[0001] The present invention relates to a device for monitoring the temperature of a heat source, and more particularly to a monitoring device including an electronic component whose resistance varies with the operating temperature. Background Art

[0002] The present invention provides a device for detecting an excess of the temperature of one or more heat sources, thereby allowing adjustment of the monitored temperature threshold.

[0003] A device for monitoring the temperature of a plurality of heat sources constituted by battery cells of a battery is known from document CN 102195270. The device includes a plate whose volume varies with temperature. The plate is placed against the wall of the battery cell to be monitored. In the case of overheating, the plate expands and mechanically actuates a switch placed facing the plate, and the opening of the switch interrupts the passage of the charging current through the battery cell.

[0004] However, in this solution, there is only one parameter for adjusting the overheat temperature threshold, that is, the distance between the plate and the switch; thus, this parameter is only adjustable during the manufacture of a module including one or more battery cells to be monitored and cannot be changed thereafter. After manufacture is completed, it will no longer be possible to adjust the monitored temperature threshold. In addition, it will cause the battery cell to be suddenly disconnected, and thus no other corrective measures can be envisaged.

[0005] Therefore, there is a need for a device for monitoring the temperature of one or more heat sources, thereby allowing adjustment of the monitored temperature threshold.

[0006] For this purpose, the present invention aims to provide a device for detecting an excess of a first predefined threshold of the temperature of at least one heat source, the detection device comprising:

[0007] - at least one component whose resistance varies according to the operating temperature of the component,

[0008] - a power source capable of delivering a current flowing through the component,

[0009] The component is thermally coupled to the heat source such that the operating temperature (Tf) varies according to:

[0010] - the temperature of the heat source, and

[0011] - the heat released due to Joule heating in the component when the current flows through the component,

[0012] If the operating temperature is higher than a second predefined temperature threshold called the trip threshold, the variable resistance has a high value.

[0013] The power supply is configured to generate the current such that the operating temperature is higher than or equal to the trip threshold when the temperature of the heat source is higher than or equal to the first predefined temperature threshold, and thus the variable resistance has the high value.

[0014] Wherein, the power supply is a current source, and wherein the current is delivered in the form of periodic pulses having a fixed duty cycle or a variable duty cycle.

[0015] In a preferred embodiment, the device according to the invention may advantageously have the following features, individually or in combination:

[0016] - The device may be electrically isolated from the heat source.

[0017] - The device may be configured to detect that one of a plurality of heat sources exceeds the first temperature threshold, and the device may include a plurality of components in the form of a plurality of resettable fuses, each resettable fuse being thermally coupled to at least one heat source, and these fuses being connected in series.

[0018] - The device may further include a plurality of resistors, each of which may have a different resistance, and one resistor may be connected in parallel across the two ends of each fuse.

[0019] - The at least one heat source may be a battery cell of a battery.

[0020] - The device may further include a monitoring module configured to trigger a correction action or a marking action when the variable resistance of one of the components has the high value.

[0021] Another subject of the present invention is a method for monitoring that at least one heat source exceeds a first threshold of temperature, the method being performed by a detection device (D), the detection device including:

[0022] - At least one component, the resistance of the at least one component being variable according to the operating temperature of the component, and if the operating temperature is higher than a second predefined temperature threshold called the trip threshold, the variable resistance has a high value.

[0023] - A power supply capable of delivering a current flowing through the component.

[0024] The method includes:

[0025] - A step of thermally coupling the at least one heat source to the at least one component such that the operating temperature varies according to:

[0026] ■ The temperature of the heat source, and

[0027] ■ The heat released due to Joule heating in the component when the current flows through the component.

[0028] - The step of connecting the power supply to the at least one component;

[0029] - The step of configuring the power supply to generate the current such that when the temperature of the heat source is higher than or equal to the first predefined temperature threshold, the operating temperature is higher than or equal to the trip threshold, and thus the variable resistor has the high value,

[0030] wherein the power supply is a current source, and wherein the current is delivered in the form of periodic pulses having a fixed duty cycle or a variable duty cycle.

[0031] In a preferred embodiment, the method according to the invention may advantageously have, alone or in combination, the following features, provided that the detection device can include the following:

[0032] - A plurality of components connected in series and each having a resistance that can vary according to the respective operating temperature, and

[0033] - A plurality of resistors having different resistances, one resistor being connected in parallel across the two ends of each component, such that when the resistance of the component has the high value, the equivalent resistance of the electrical chain formed by these components and these resistors has different values for each component and the resistor connected in parallel with the component.

[0034] The method may then include:

[0035] - During the thermal coupling step, thermally coupling each component to at least one heat source,

[0036] - During the connection step, connecting the power supply to the electrical chain formed by these components and these resistors,

[0037] The method may then further include:

[0038] - The step of generating a power supply signal using the power supply,

[0039] - The step of detecting a response signal across the two ends of the power supply,

[0040] - The step of determining the equivalent resistance of the electrical chain formed by these components and these resistors;

[0041] - The step of identifying the component whose resistance has the high value based on the equivalent resistance.

[0042] Then, the configuration step may include a sub-step of determining the dimension of the detection device, and this sub-step includes determining a first duty cycle of the periodic current pulse according to the following:

[0043] - The first temperature threshold to be monitored,

[0044] - The electrical characteristics of the at least one component, and

[0045] - The characteristics of the thermal coupling between the at least one heat source and the at least one component.

[0046] After the first detection of exceeding the first temperature threshold, the configuration step may further include:

[0047] - A sub-step of emitting a current pulse with a second duty cycle less than the first duty cycle;

[0048] - A sub-step of confirming the detection of the first over-detection.

[0049] Another subject of the present invention relates to a vehicle comprising means for detecting temperature exceedance as described above. Description of the Drawings

[0050] Figure 1 and Figure 2 Schematically shows two embodiments of a device for detecting temperature exceedance, the device being arranged to monitor the respective temperatures of the battery cells of a plurality of batteries.

[0051] Figure 3 and Figure 4 Shows two devices for detecting temperature exceedance according to two embodiments of the present invention.

[0052] Figure 5 Shows the steps of a method for identifying a heat source that has exceeded a predefined temperature threshold according to an embodiment of the present invention. Detailed Description

[0053] Figure 1 Schematically shows a detection device according to an embodiment of the present invention. Device D is installed in vehicle V to monitor the temperatures of a plurality of heat sources S1, S2, Sj,..., Sn composed of the battery cells of batteries grouped into modules M1,..., Mm. The battery cells of these batteries are soft-shell battery cells.

[0054] The device includes a plurality of components C1, C2, Ci, Ck, and the resistance R_PTC of these components can vary according to the operating temperature Tf of components C1, C2, Ci, Ck. In a preferred embodiment, components C1, C2, Ci, Ck take the form of a plurality of self-resetting fuses.

[0055] Each self-resetting fuse C1, C2, Ci, Ck is thermally coupled to at least one heat source S1, S2, Sj, Sn. In Figure 1In the example shown, the heat source is the battery cell of the battery, and thermal coupling is achieved by coating each resettable fuse C1, C2, Ci, Ck with a thermal coating and then fastening the thermal coating into contact with the battery cell of the battery. Each resettable fuse C1, C2, Ci, Ck is coupled to the battery cells of two batteries, and the coating is fastened by adhesive bonding and / or compression.

[0056] The device further includes a power source E that is capable of delivering a current Is flowing through the resettable fuses C1, C2, Ci, Ck, which are thermally coupled to the battery cells S1, S2, Sj, Sn of the battery, and thus the respective operating temperatures of the components C1, C2, Ci, Ck vary according to:

[0057] - the temperature T of one or more heat sources S to which the component is thermally coupled, and

[0058] - the heat released due to Joule heating in the component when the current Is flows through the components C1, C2, Ci, Ck.

[0059] If the operating temperature Tf of the component is higher than a second predefined temperature threshold called the trip threshold Td, the variable resistance of the component (in this example, the resettable fuse) has a high value Rd.

[0060] The power source is configured to generate a current Is such that when the temperature T of the heat source S is higher than or equal to a first predefined temperature threshold TS, the operating temperature Tf is higher than or equal to the trip threshold Td, and thus the variable resistance has a high value Rd.

[0061] The device D is electrically isolated from the heat source S. In this way, the operating characteristics of the detection device D are independent of the electrical characteristics of the heat source to be monitored: for a voltage of typically 12V delivered by the power source E, the value of the current Is flowing through the resettable fuse varies between 100 mA and 800 mA, while the operating voltage jointly delivered by the battery cells of all the batteries considered is typically 400V.

[0062] In the example shown, the power source E is a current source, and the components C1, C2, Ci, Ck are connected in series. In this way, the current Is does not depend on either the number k of components of the device D or the number n of heat sources to be monitored, which simplifies the adjustment of the first temperature threshold TS. By simply reducing the current Is delivered by the current source E, the first temperature threshold TS can be increased, and vice versa.

[0063] As already mentioned, the operating temperature of a component (in this example, a self - resetting fuse) depends on the temperature T of the heat source S to which the component is thermally coupled, and on the heat generated due to Joule heating in the component when a current Is flows through the component. Thus, for a component characterized by a given trip temperature threshold Td, the first temperature threshold TS of the monitored heat sources S1, S2, Sj, Sn can be adjusted by varying the amount of heat generated due to Joule heating in the component.

[0064] In a preferred embodiment, the current Is is delivered in the form of periodic pulses with a fixed duty cycle or a variable duty cycle.

[0065] Thus, the amount of heat generated due to Joule heating in the component can be adjusted by modifying the duration for which the current flows through the component, which can be achieved simply by varying the duty cycle of the periodic pulses.

[0066] Figure 3 An embodiment of the detection device is shown, which incorporates a power supply E configured to deliver the current Is in the form of electrical pulses.

[0067] In the stage E32 of determining the dimensions of the detection device D, a fixed duty cycle can be defined for each application based on the first temperature threshold TS to be monitored, the electrical characteristics of the components C1, C2, Ci, Ck, and the characteristics of the thermal coupling between the heat source to be monitored and these components. Thus, this duty cycle, and hence the first temperature threshold TS to be monitored, can be adjusted according to the particularities of each application.

[0068] During the utilization stage of the detection device D, the ability to change the duty cycle allows the first temperature threshold TS to be changed without having to change the way the device D is installed or the way it is thermally coupled to the heat source.

[0069] After the first detection of exceeding the first temperature threshold TS, a one - time change in the duty cycle allows this first detection to be confirmed in stage E36, and thus allows the reliability of the detection result to be increased by emitting pulses with a lower duty cycle in stage E34.

[0070] In a preferred embodiment, the detection device D further includes a monitoring module M, which is configured to trigger a correction action or a marking action when the variable resistance of one of the components C1, C2, Ci, Cn has a high value Rd. This module M is configured to detect a change in the resistance value of the component Ci, for example, by measuring the voltage across the power supply terminals and / or by measuring the current at the terminals of the power supply.

[0071] Next, the monitoring module M may trigger a cooling action, which will cause the temperatures of the heat source and components C1, C2, Ci, Cn to decrease. This configuration is particularly advantageous when the detection device D is equipped with components C1, C2, Ci, Cn in the form of self - resetting fuses. Specifically, once the operating temperature drops, the variable resistance of this type of component returns to a low value (referred to as the holding resistance Rm), which enables the process of monitoring the heat source temperature to start again.

[0072] In a preferred embodiment, as Figure 2 shown, the device D further includes a plurality of resistors R1, R2, Ri, Rk, each having a different resistance, and one resistor is connected in parallel across the two ends of each component C1, C2, Ci, Ck.

[0073] As will be explained below, this arrangement allows identification of the self - resetting fuse Ci (which is thermally coupled to a heat source Sj, a battery cell in this example) that has exceeded the first temperature threshold TS. Thus, a cooling strategy for a specific heat source can be implemented.

[0074] This detection device D can be configured to identify, among a plurality of heat sources S1, S2, Sj, Sn, the heat source Sj that has exceeded the first predefined temperature threshold TS. The device D includes a plurality of components C1, C2, Ci, Ck that are connected in series and whose respective resistances can vary according to the corresponding operating temperatures. If the operating temperature Tfj is higher than a second predefined temperature threshold (referred to as the trip threshold Td), the variable resistance has a high value Rd (referred to as the trip resistance), while in the opposite case, the variable resistance has a low value Rm (referred to as the holding resistance).

[0075] It should be noted that, according to the embodiment, the holding resistance Rm of the components C1, C2, Ci, Ck can correspond to a value close to 0Ω, and the trip resistance Rd corresponds to an open circuit; this is the case for components such as fuses or on - off switches.

[0076] In an embodiment using self - resetting fuses, the holding resistance Rm is typically a resistance of 0Ω, and the trip resistance Rd is typically a resistance of several kΩ.

[0077] In any case, the value of the holding resistance Rm is negligible relative to the value of the trip resistance Rd, such that Rd+(k - 1)*Rm≈Rd, where k is the number of components of the detection device D. The use of this feature will be described below.

[0078] Each component C1, C2, Ci, Ck can be thermally coupled to at least one of heat sources S1, S2, Sj, Sn such that when the temperature of the at least one heat source Si, Sk, Sn is higher than or equal to a first predefined temperature threshold TS, the operating temperature of the component is higher than or equal to a trip threshold Td, and thus the variable resistor has a high value Rd.

[0079] The device D further includes a plurality of resistors R1, R2, Ri, Rk having different resistances, and one resistor is connected in parallel across the two ends of each component C1, C2, Ci, Ck such that when the resistance of the component Ci has a high value Rd, the equivalent resistance Re of the electrical chain formed by the components C1, C2, Ci, Ck and the resistors R1, R2, Ri, Rk is a characteristic value of this component (Ck) and the resistor Ri connected in parallel with this component.

[0080] Alternatively, the resistor Ri can be connected in parallel to a group of components Ci-1, Ci, Ci+1, and this group of components is connected in series and each is coupled to at least one corresponding heat source. This arrangement is particularly advantageous when the heat sources are grouped. An example of the application of this embodiment of the present invention is to monitor the temperature of the battery cells of the soft-pack batteries grouped into battery modules M1, M2, ……, Mm, as Figure 4 shown. If one of the battery cells Sj of the monitored battery exceeds the first predefined temperature threshold TS, the component Ci thermally coupled to this battery cell Sj will have a high resistance Rd. If the other battery cells in the battery do not exceed the first temperature threshold TS, this group of components connected in series will have an equivalent resistance Rd+(k-1)*Rm, where k is the number of components connected in series; these resistors connected in parallel to the resistor Ri will jointly have an equivalent resistance

[0081] Re = Ri*[Rd+(k-1)*Rm] / [Ri+Rd+(k-1)*Rm].

[0082] The component Ci and the resistor Ri are selected such that:

[0083] 1) The value of the resistance Rm is negligible with respect to the value of Rd, that is, such that:

[0084] Rd+(k-1)*Rm≈Rd.

[0085] Therefore, since:

[0086] Re = Ri*[Rd+(k-1)*Rm] / [Ri+Rd+(k-1)*Rm],

[0087] its value is substantially equal to:

[0088] Re≈Ri*Rd / (Ri+Rd).

[0089] 2) Ri is negligible with respect to Rd, and thus:

[0090] Ri * Rd / (Ri + Rd) ≈ Ri.

[0091] Thus, the equivalent resistance Re of the resistor Ri connected in parallel to the following is substantially equal to Ri: the component Ci, which is thermally coupled to the cell Sj of the battery that has exceeded the first temperature threshold TS; or a set of components Ci-1, Ci, Ci+1, which are connected in series and one of which, the component Ci, is thermally coupled to the cell Sj of the battery that has exceeded the first temperature threshold TS. By wisely choosing different resistances for the resistors R1, R2, …, Ri, Rk, the equivalent resistance of the electrical chain under discussion can exhibit characteristic values of the following:

[0092] - the component Ci, which is thermally coupled to the cell Sj of the battery that has exceeded the first temperature threshold TS, or

[0093] - a set of components Ci-1, Ci, Ci+1, which are connected in series and one of which, the component Ci, thermally coupled to the cell Sk of a battery, has exceeded the first temperature threshold TS,

[0094] and the resistor Ri connected in parallel to the component or the set of components.

[0095] Now a method for identifying the heat source Sj that has exceeded the first predefined threshold TS of the temperature T among a plurality of heat sources S1, S2, Sj, Sn will be described with reference to Figure 5 The method can be implemented using a detection device such as the one described above, i.e., using a detection device including the following: a plurality of components C1, C2, Ci, Ck, which can have a low value (referred to as the holding resistance Rm) or a high value (referred to as the trip resistance Rd) according to their operating temperature; and a plurality of resistors R1, R2, Ri, Rk, which have different resistances and are connected in parallel to a component Ci or a set of components Ci-1, Ci, Ci+1 connected in series.

[0096] The method includes:

[0097] - Step E10, thermally coupling a plurality of heat sources S1, S2, Sj, Sn to the components C1, C2, Ci, Ck, each component being thermally coupled to at least one heat source Si such that when the temperature of the at least one heat source is higher than or equal to the first predefined temperature threshold TS, the operating temperature of the component is higher than or equal to the trip threshold Td, and thus the variable resistance of the component has a high value Rd,

[0098] - Step E10, thermally coupling a plurality of heat sources S1, S2, Sj, Sn to the components C1, C2, Ci, Ck, each component being thermally coupled to at least one heat source Si such that when the temperature of the at least one heat source is higher than or equal to the first predefined temperature threshold TS, the operating temperature of the component is higher than or equal to the trip threshold Td, and thus the variable resistance of the component has a high value Rd,

[0099] - Step E20, connect the electrical chain formed by components C1, C2, Ci, Ck and resistors R1, R2, Ri, Rk to the power supply E.

[0100] - Step E30, generate supply signals U, I using the power supply E.

[0101] - Step E40, detect the response signals i, u across the two ends of the power supply E.

[0102] - Step E50, determine the equivalent resistance Re of the electrical chain formed by components C1, C2, Ci, Ck and resistors R1, R2, Ri, Rk.

[0103] - Step E60, identify the component Ci whose resistance has a high value Rd based on the equivalent resistance Re.

[0104] In the example shown, the supply signal generated in generation step E30 is the current Is, and the response signal detected in detection step E40 is the voltage across the two ends of the current source E.

[0105] Since the value of the generated current Is and the value of the detected voltage are known, the equivalent resistance Re of the electrical chain is determined during the execution of determination step E50. As explained above, this equivalent resistance is a characteristic of the component Ci or a group of components and the resistor Ri connected to that component or group of components, and one of that component or group of components has a high resistance value Rd. This allows this component Ci to be identified in identification step E60.

[0106] Of course, the present invention is not limited to these examples and embodiments described and shown. On the contrary, many variations of the present invention are possible within the capabilities of those skilled in the art.

[0107] For example, depending on the configuration of the heat source, other arrangements are possible. In particular, the present invention can be applied to monitoring areas of a heat source under the following conditions: a grid covering the area to be monitored is formed, and components (such as those described) thermally coupled to the area to be monitored are placed at the nodes of the grid.

Claims

1. A detection device (D) for detecting that at least one heat source (S) exceeds a first predefined temperature threshold (TS) of a temperature (T), the detection device (D) comprises:[[]] - at least one component (C1, C2, Ci, Ck), the resistance of which can vary according to the operating temperature of the component (C1, C2, Ci, Ck), - a power supply capable of delivering a current (Is) flowing through the component (C1, C2, Ci, Ck), the component (C1, C2, Ci, Ck) can be thermally coupled to the heat source (S), such that the operating temperature (Tf) varies according to:[[]] - the temperature (T) of the heat source (S), and - the heat released due to Joule heating in the component when the current (Is) flows through the component (C1, C2, Ci, Ck), if the operating temperature (Tf) is higher than a second predefined temperature threshold referred to as a trip threshold (Td), the variable resistance has a high value (Rd), the power supply is configured to generate the current (Is) to adjust the first predefined temperature threshold (TS) such that when the temperature (T) of the heat source (S) is higher than or equal to the first predefined temperature threshold (TS), the operating temperature (Tf) is higher than or equal to the trip threshold (Td), and thus the variable resistance has the high value (Rd), wherein the power supply is a current source and wherein the current (Is) is delivered in the form of periodic pulses with a fixed duty cycle or a variable duty cycle.

2. The detection device (D) according to claim 1, wherein,[[]] the detection device (D) is electrically isolated from the heat source (S).

3. The detection device (D) according to claim 1 or 2, characterized in that,[[]] the detection device is configured to detect that one of a plurality of heat sources exceeds the first predefined temperature threshold (TS), and wherein the detection device includes a plurality of components (C1, C2, Ci, Ck) in the form of a plurality of self - resetting fuses, each self - resetting fuse being thermally coupled to at least one heat source, and these fuses are connected in series.

4. The detection device (D) according to claim 3, further comprising:[[]] a plurality of resistors (R1, R2, Ri, Rk), each having a different resistance, and one resistor is connected in parallel across the two ends of each fuse.

5. The detection device (D) according to claim 1 or 2, wherein,[[]] the at least one heat source is a battery cell of a battery.

6. The detection device according to claim 1 or 2, further comprising:[[]] a monitoring module (M) configured to trigger a correction action or a marking action when the variable resistance of one of the components (C1, C2, Ci, Ck) has the high value (Rd).

7. A monitoring method for monitoring that at least one heat source exceeds a first predefined temperature threshold (TS) of a temperature (T), the monitoring method being executed by a detection device (D), the detection device comprises:[[]] - At least one component (C1, C2, Ci, Ck), the resistance of the at least one component being variable according to the operating temperature (Tf) of the component, the variable resistance having a high value (Rd) if the operating temperature (Tf) is higher than a second predefined temperature threshold called the trip threshold (Td), - A power supply capable of delivering a current (Is) flowing through the component (C1, C2, Ci, Ck), the monitoring method comprising: - Step E10 of thermally coupling the at least one heat source to the at least one component (C1, C2, Ci, Ck) such that the operating temperature (Tf) varies according to: o the temperature (T) of the heat source (S), and o the heat released due to Joule heating in the component when the current (Is) flows through the component (C1, C2, Ci, Ck), - Step E20 of connecting the power supply (E) to the at least one component (C1, C2, Ci, Ck); - Step E30 of configuring the power supply to generate the current (Is) to adjust a first predefined temperature threshold (TS) such that the operating temperature (Tf) is higher than or equal to the trip threshold (Td) when the temperature (T) of the heat source (S) is higher than or equal to the first predefined temperature threshold (TS), and thus the variable resistance has the high value (Rd), wherein the power supply is a current source and wherein the current (Is) is delivered in the form of periodic pulses with a fixed or variable duty cycle.

8. The monitoring method according to claim 7, wherein, the detection device (D) comprises: a plurality of components connected in series and each having a resistance variable according to the respective operating temperature, a plurality of resistors having different resistances, one resistor being connected in parallel across the ends of each component such that when the resistance of the component has the high value (Rd), the equivalent resistance (Re) of the electrical chain formed by the components and the resistors has different values for each component and the resistor connected in parallel with the component, and wherein, - during step E10, each component is thermally coupled to at least one heat source, - during step E20, the power supply (E) is connected to the electrical chain formed by the components and the resistors, the monitoring method further comprises: - step E30 of generating a supply signal (I) using the power supply (E), - step E40 of detecting a response signal (u) across the ends of the power supply (E), - step E50 of determining the equivalent resistance (Re) of the electrical chain formed by the components and the resistors; - step E60 of identifying the component whose resistance has the high value (Rd) according to the equivalent resistance (Re).

9. The monitoring method according to any one of claims 7 and 8, wherein, step E30 comprises a sub-step E32 of determining the dimension of the detection device (D), which sub-step comprises determining a first duty cycle of the periodic current pulse according to: - a first predefined temperature threshold (TS) to be monitored, - the electrical characteristics of the at least one component (C1, C2, Ci, Ck), and - The characteristics of the thermal coupling between the at least one heat source (S) and the at least one component (C1, C2, Ci, Ck).

10. The monitoring method according to claim 9, wherein, after the first detection of exceeding the first predefined temperature threshold (TS), the step E30 further includes: - Sub-step E34, emitting a current pulse whose second duty cycle is less than the first duty cycle; - Sub-step E36, confirming the detection of the first detection of exceeding the first predefined temperature threshold.

11. A vehicle (V) comprising a detection device (D) according to any one of claims 1 to 6.

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