Method for optimizing the lifespan of at least one capacity for an on-board charger.

Abstract

The invention relates to a method for optimizing the lifespan of at least one capacitor in a DCLINK module (400) of an electronic device (100), the method comprising the following steps: a first step S1) consisting of charging the high-voltage battery (600) with a determined setpoint power (Pcons), a third step S3) consisting of activating and incrementing a second counter (Compt_vie_charg_2), a fourth step S4) consisting of taking a first measurement (MTrelcap_1) and taking, using the first temperature sensor (900), a first representative measurement of the temperature of the liquid (MTL_1) circulating in the cooling module (700), a sixth step S6) consisting of averaging n representative measurements of the actual temperature of at least one capacitor in the DCLINK module (400) using the second temperature sensor (910) (MTrelcap_M). Figure for the abstract: Fig 3

Description

Title of the invention: Method for optimizing the lifespan of at least one capacity for an on-board charger. Technical field

[0001] The invention relates to the field of electric vehicles and more specifically to a method for optimizing the lifespan of at least one capacity for an on-board charger of an electric vehicle. Prior art

[0002] An electric vehicle comprises at least one high voltage battery, for example a 600 Volt or 800 Volt battery, coupled to a high voltage electrical network (internal network of the electric vehicle) and a low voltage type battery, for example 12 Volt, coupled to a low voltage electrical network (internal network of the electric vehicle). The high voltage battery as well as the low voltage battery are adapted to deliver electrical energy and to accumulate electrical energy respectively on the low voltage electrical network and on the high voltage electrical network.

[0003] To do this, the electric vehicle includes an on-board charger, better known as OBC for "On Board Charger" in English, connected to the high-voltage battery called "BHT" via the high-voltage electrical network. The on-board charger is adapted to, once connected to a power supply network, convert the alternating voltage supplied by an external electrical network into a high-voltage direct voltage capable of recharging the high-voltage battery.

[0004] [Fig.l] represents a schematic diagram of a state-of-the-art on-board electric charger 10 adapted for charging the high-voltage battery 60 dedicated, for example, to the power supply of an electric machine for the propulsion of an electric or hybrid vehicle.

[0005] The on-board electrical charger 10 comprises an electromagnetic filtering circuit 20 which may be optional, and a power factor correction circuit 30 called “PFC” which may be bidirectional. Said power factor correction circuit 30 further comprises an AC-DC converter circuit adapted to receive, for example, an electric current from a domestic AC power supply network.

[0006] The on-board electrical charger 10 also comprises a DCLINK module 40 arranged between the power factor correction circuit 30 and a DC / DC direct-direct converter 50 adapted to charge the high voltage battery 60.

[0007] As is known to those skilled in the art, charging the low voltage power supply battery, not shown in [Fig.l], is produced by the high voltage battery 60, by a second DC-DC converter, not shown in [Fig.l] connected between the high voltage battery 60 and the low voltage power supply battery.

[0008] The high voltage battery is charged using the on-board electric charger 10 once coupled to the electrical network 70.

[0009] The DCLINK module 40 is composed of a determined number of electrochemical capacitors whose equivalent value is relatively large to accept a relatively large effective current value when charging the battery and to reduce, or sufficiently filter the ripples of the rectified voltage at the output of the power factor correction circuit 30 so that, said ripples, once filtered, are compatible with the input characteristics of the DC / DC converter 50.

[0010] A solution well known to those skilled in the art for producing the DCLINK 40 module is to implement a relatively large number of capacitors to obtain a large equivalent capacity value to be able to both control the ripples and accept large effective currents (or RMS currents for "Root Mean Square" in English) when charging the high voltage battery at full power.

[0011] A disadvantage of this solution is the need to increase the surface area of ​​the printed circuit or PCB for "Printed Circuit Board" in English to accommodate said capacities, significantly increasing the cost of the on-board charger 10.

[0012] Furthermore, the value of the effective current and more precisely the maximum value of the effective current depends on the charge level of the battery and the power of the charger. For example, an on-board charger may have a nominal power of 7KW.

[0013] Thus, depending on said maximum value of the effective current passing through said capacitors of the DCLINK module 40, the latter heat up and can sometimes reach temperatures equal to or greater than a critical capacity threshold temperature Tcritcap which is given by the manufacturer of the capacitors.

[0014] For example, the critical capacity threshold temperature Tcritcap is 85°C. Thus, in the case where, during charging of the high voltage battery by the charger, the temperature of the capacities reaches or exceeds the critical capacity threshold temperature Tcritcap, then the lifetime of said capacities is reduced compared to use of said capacities at temperatures below the critical capacity threshold temperature Tcritcap.

[0015] To limit the temperature increase of the capacitors of the DCLINK 40 module, it is common to use a cooling device arranged for example on said DCLINK 40 module. The cooling device is adapted to cool the capacities through the DCLINK 40 module, but also to cool electronic components arranged on the printed circuit of the on-board charger 10. Such a solution can use air cooling. However, since the quantities of calories to be evacuated are relatively large, the cooling device can also be based on a principle of cooling by a liquid, i.e. water or glycol. Thus, it is possible to improve the elimination of calories generated by the electronic components and the capacities.

[0016] As mentioned above, it is necessary to control the lifetime of the capacities of the on-board charger 10 because the latter is given for a minimum duration of use by the vehicle manufacturer, for example 20,000 hours, under conventional conditions of use and recharging.

[0017] However, sometimes, said charger 10 and therefore the capacities of the DCLINK module 40 of said charger 10 are used in extreme conditions, for example when recharging the electric vehicle on a charging station in full sun in summer in a supermarket parking lot which causes abnormal heating of the capacities and therefore overheating of said charger which can reduce its duration of use.

[0018] There is therefore a real need to ensure the nominal or minimum duration of use of the charger given by the manufacturer under normal conditions of use for the user in order not to damage its brand image with the user.

[0019] Furthermore, it is also possible that the charger 10 during its life has been used most often in very good conditions, for example the temperature of the capacitors of the DCLINK module 40 has never gone above the critical usage threshold temperature Tcritcap, and therefore that they are still in very good condition or in a very good state at the end of the nominal usage period of the charger 10. In other words, they can still be used.

[0020] There is therefore a real need to extend the life of the charger 10 as much as possible after its nominal life in order to reduce the ecological impact of the electric vehicle as much as possible. Statement of the invention

[0021] The invention relates to a method for optimizing the lifetime of at least one capacitor of a DCLINK module of an electronic device suitable for charging a high-voltage battery of an electric vehicle. The device comprising a power factor correction circuit, a DC / DC direct-direct converter, a cooling device comprising at least one pipe suitable for the passage of a liquid, said device being suitable for cooling the at least one capacitor of the DCLINK module using the liquid, a first temperature sensor arranged at the at least one pipe of the cooling device, said first temperature sensor being adapted to measure a temperature of the liquid, a second temperature sensor arranged on at least one capacity of the DCLINK module and adapted to measure an actual temperature of said at least one capacity, the method comprising the following steps: • a first step S1) consisting of charging the high-voltage battery with a determined set power during a first determined duration of use of the electronic device, and consisting of executing a fourth step S4) after exceeding the first duration of use of the electronic device, • a third step S3) consisting of activating and incrementing a second counter, • the fourth step S4) consisting of recording a first measurement (MTrelcap_l) representative of the actual temperature of at least one capacity of the DCLINK module using the second temperature sensor, and recording using the first temperature sensor a first measurement representative of the temperature of the liquid circulating in the cooling module, • a sixth step S6) consisting of averaging n measurements representative of the actual temperature of at least one capacity of the DCLINK module using the second temperature sensor, and averaging n measurements representative of the temperature of the liquid circulating in the cooling module, • a seventh step S7) consisting of comparing the average value of the measurements representative of the actual temperature of at least one capacity with a critical capacity threshold temperature and in the case where the result of the comparison is negative, executing an eighth step S8), otherwise the execution of a ninth step S9), • the eighth step S8), consisting of charging the high-voltage battery with the set power determined before the execution of the third step S3), • the ninth step S9), consisting of comparing the average value of the measurements representative of the actual temperature of at least one capacity with the average value of the measurements representative of the temperature of the liquid and in the case where the result of the comparison is negative, executing the eighth step S8), otherwise executing a tenth step S10), • the tenth step S10), consisting of comparing the average value of the measurements representative of the temperature of the liquid with a first threshold coolant value, and in the case where the result of the comparison is negative then executing the third step S3), otherwise executing an eleventh step SU), • the eleventh step SI 1), consisting of comparing the average value of all the values ​​of the measurements representative of the actual temperature of at least one capacity to the average value of the measurements representative of the temperature of the liquid, and in the case where the result of the comparison is less than a first temperature delta value then execute a twelfth step S12); otherwise execute a thirteenth step S13), • the twelfth step S12) consisting of reducing the set power by a value of n% before executing the third step S3), • the thirteenth step S13) consisting of comparing the average value of all the values ​​of the measurements representative of the actual temperature of at least one capacity with the average value of the measurements representative of the temperature of the liquid, and in the case where the result of the comparison is less than a second temperature delta value, then execute a fourteenth step S14); otherwise a fifteenth step S15), • the fourteenth step S14), consisting of reducing the set power by a value of m% before executing the third step S3), • the fifteenth step S15), consisting of cutting the set power before executing the third step S3). For example, the maximum set power is the nominal power of the electronic device.

[0022] For example, the critical capacity threshold temperature is equal to 50°C.

[0023] To limit the impact of the temperature rise, the first threshold coolant value (Tliqseuill) is equal to 50°C.

[0024] In an exemplary embodiment, the first temperature delta value is equal to 15°C.

[0025] To control the temperature of the capacities, the value of n% of the reduction in the set power is for example equal to 20%.

[0026] In another example, the value of m% of the reduction in the setpoint power is equal to 50%.

[0027] Alternatively, the second temperature delta value PVDT2 is equal to 20°C.

[0028] Another variant of the invention proposes that the first determined duration of use of the electronic device is equal to 20,000 hours. Brief description of the drawings

[0029] Other characteristics and advantages of the invention will become apparent from reading the description which follows. This is purely illustrative and must be read in conjunction with the appended drawings in which:

[0030] [Fig.l] [Fig.l] is a structural illustration of a prior art charger,

[0031] [Fig.2] [Fig.2] shows a structural diagram of the charger according to the invention,

[0032] [Fig.3] [Fig.3] is an illustration of the method according to the invention, Description of the embodiments

[0033] The invention will be presented in the case of an implementation in an electric vehicle comprising at least one electric machine capable of converting electrical energy into mechanical energy in order to drive at least one wheel of the electric vehicle in rotation.

[0034] With reference to [Fig.2], a block diagram of an on-board electrical charger 100 according to the invention is shown. Said on-board electrical charger 100 is adapted to charge the high-voltage battery 600 dedicated, for example, to the power supply of a direct current machine for the propulsion of an electric or hybrid vehicle.

[0035] The on-board electric charger 100 can be unidirectional or bidirectional.

[0036] The latter comprises an electromagnetic filtering circuit 200 which can be optional and a power factor correction circuit 300 called “PFC” which can be bidirectional, said power factor correction circuit 300 comprising an AC-DC converter circuit adapted to receive an electric current from a domestic AC power supply network for example.

[0037] A DCLINK 400 module arranged between the power factor correction circuit 300 and a DC / DC 500 direct-direct converter adapted to charge the high voltage battery 600.

[0038] As is known to those skilled in the art, the charging of the low voltage power supply battery, not shown in [Fig.2], is carried out by the high voltage battery 600, by a second DC-DC converter connected between the high voltage battery 600 and the low voltage power supply battery.

[0039] The high voltage battery is charged using the on-board electric charger 100 once coupled to the electrical network.

[0040] Cleverly, the DCLINK 400 module is composed of a determined number of capacitors, for example electrochemical capacitors, adapted to accept a relatively high effective current value when charging the battery and to sufficiently filter the ripples of the rectified voltage at the output of the power factor correction circuit 300 so that, said ripples, once filtered, are compatible with the input characteristics of the DC / DC converter 500. Cleverly, the device of the invention proposes to control an actual temperature of at least one capacitor called Trelcap.

[0041] The on-board charger 100 cleverly comprises a cooling device 800 arranged for example on the DCLINK module 400 but also on the power factor correction circuit 300 and on the DC / DC direct-direct converter 500. The cooling device 800 comprises, for example, at least one pipe adapted to allow a cooling liquid to circulate. The cooling liquid is adapted to absorb calories originating from the heating of the electronic components of the power factor correction circuit 300 and the DC / DC converter 500, but also adapted to absorb the calories generated by the capacities of the DCLINK module 400. The mechanical fixing and the thermal coupling between the different elements are obvious to those skilled in the art.

[0042] Advantageously, a first temperature sensor 900 is arranged at the level of the pipe of the cooling device 800 allowing measurements of the temperature of the coolant Tliq. In a variant, the temperature of the liquid is given by measuring means arranged on the cooling circuit of the electric vehicle.

[0043] Advantageously, a second temperature sensor 910 is arranged on at least one capacity of the DCLINK module 400. Alternatively, the second temperature sensor 910 is arranged on a packaging of the DCLINK module 400. The second temperature sensor 910 is adapted to measure the actual Trelcap temperature of at least one capacity representative of the temperature of all the capacities of the DCLINK module 400. Thus, thanks to the device of the invention, it is possible to know the temperature in real time of the DCLINK module 400 and depending on this to activate or not the on-board charger 100.

[0044] The first temperature sensor 900 and the second temperature sensor 910 may use thermistor technology or alternatively semiconductor technology.

[0045] The invention also proposes a method for optimizing the lifetime of at least one capacity of the DCLINK 400 module of the on-board charger 100.

[0046] To do this, the method of the invention comprises in its first exemplary embodiment a first step S1) during which a lifetime counter of the charger 100 named in the following Compt_vie_charg, which is for example initialized and set to zero at the start of use of the electric vehicle and throughout its duration of use without the possibility of resetting to zero, is incremented. For example, the counter Compt_vie_charg is incremented by the number of hours of use of the charger 100.

[0047] As mentioned above in the description, the electric vehicle manufacturer sells its vehicle with a nominal charger lifetime or usage time. For example, the vehicle's charger 100 is certified and guaranteed for 20,000 hours of use, therefore 20,000 hours of charging of the high-voltage battery 600 regardless of the conditions during the 20,000 hours of charging.

[0048] The method of the invention proposes as illustrated in [Fig.3] in the case where the electric vehicle is coupled to an external voltage socket and that a recharge of the high voltage battery 600 is necessary, a first step SI) consisting of charging the high voltage battery 600 by the charger 100 with a maximum setpoint power Pcons or in any case as that determined by the vehicle manufacturer during the 20,000 hours of use. In the remainder of the description, the term "setpoint power Pcons" means that the setpoint current delivered by the charger 100 is at the maximum in order to reach the maximum power of the charger 100 as a function of the voltage at the terminals of the high voltage battery 600.

[0049] The method then proposes during a second step S2) to move to a third step S3) only when the value of a first counter Compt_vie_charg_l is equal to 20000 hours, otherwise the method proposes moving to the first step S1). Of course the value 20000 hours can be different depending on the parameters of the manufacturer of the electric vehicle. Thus, cleverly, during the 20000 hours of use, the charger will be used under normal usage conditions and therefore there will be no inconvenience of use such as an increase in the battery recharging time for the user. The method therefore proposes, when the 20000 hours of use of the charger 100 are effective, moving to the third step S3).

[0050] During the third step S3), a second counter Compt_vie_charg_2 is activated and incremented (which is activated only after 20,000 hours of use). The method then proposes moving on to a fourth step S4).

[0051] During the fourth step S4), the actual temperature of at least one capacitor of the DCLINK module 400 is recorded. To do this, a first measurement representative of the actual temperature of at least one capacitor of the DCLINK module 400, named for example MTrelcap_l, is recorded using the second temperature sensor 910. Alternatively, said value MTrelcap_l is stored in a memory of a suitable electronic circuit. A first measurement representative of the temperature of the liquid circulating in the cooling module 800, named for example MTL_1, is also recorded using the first temperature sensor 900. Alternatively, said value MTL_1 is stored in a memory of a suitable electronic circuit.

[0052] During a fifth step S5), the number of measurements representative of the actual temperature of at least one capacitance of the DCLINK 400 module named MTrelcap_X is then compared to a value of a first measurement counter PCM1_Z. For example, if the value PCM1_Z is equal to 10, in other words the value Z of PCM1 is equal to 10, then the fourth step S4) will be carried out ten times before moving on to a sixth step S6).

[0053] During the sixth step S6), the method performs an average of all the values ​​of the measurements representative of the actual temperature of at least one capacity of the DCLINK module 400. The averaged value is named MTrelcap_M. The method proposes during this sixth step S6), to carry out the same action on all the measurements representative of the temperature of the liquid circulating in the cooling module 800. The average value is named for example MTL_M.

[0054] The method then executes a seventh step S7) during which the method plans to compare the averaged value of the measurements representative of the temperature of at least one capacitor of the DCLINK 400 MTrelcap_M module with a critical capacity threshold temperature Tcritcap. Cleverly, the method of the invention takes into consideration the 20,000 hours of charging of the high-voltage battery 600 in determining the critical capacity threshold temperature Tcritcap, i.e. the already existing wear caused by the 20,000 hours of use. Cleverly, in order to further extend the service life of said capacitors and therefore to further extend the duration of use of the on-board charger 100 after the 20,000 hours of use, the invention proposes to limit the critical capacity threshold temperature Tcritcap to 50°C.Thus, as long as the temperature Tcritcap is below 50°C, it will be possible to charge the battery and when the threshold temperature Tcritcap is exceeded, the on-board charger will be switched off to no longer charge the high voltage battery 600 in order to extend the lifespan of the capacities beyond the 20,000 hours of use of said on-board charger 100.

[0055] For example, the Tcritcap value is deduced from a curve provided by the manufacturer of the capacity of the DCLINK 400 module representative of the lifetime of said capacity as a function of the operating temperature.

[0056] Thus, in the case where the average value of the measurements representative of the real temperature of at least one capacitance of the DCLINK 400 MTCrelcapM module is lower than the critical threshold temperature Tcritcap (50°C), the method proposes to move to an eighth step S8), otherwise the method provides for moving to a ninth step S9).

[0057] During the eighth step S8), the set power of the charger 100 for charging the high voltage battery 600 is maximum, allowing rapid charging of the high voltage battery 600. The method then proposes moving to the third step S3).

[0058] During the ninth step S9), the method compares the average value of the measurements representative of the actual temperature of at least one capacity of the DCLINK module 400, MTrelcap_M, with the average value of the measurements representative of the temperature of the liquid circulating in the cooling module 800, MTL_M. The method proposes, in the case where the result of the comparison is negative, to move on to the eighth step S8), and in the case where the result is positive, to move on to a tenth step S10).

[0059] During the tenth step S10), it is proposed to compare the average value MTL_M of the measurements representative of the temperature of the liquid circulating in the module of cooling 800 to a first threshold coolant value Tliqseuill. For example, the value Tliqseuill is equal to 50°C. In the case where the average value MTL_M is greater than the first threshold coolant value Tliqseuill, the process proceeds to an eleventh step SI 1). In the case where the average value MTL_M is less than the first threshold coolant value Tliqseuill, the process proceeds to the third step S3.

[0060] During the eleventh step S11), it is proposed to compare the average value of all the values ​​of the measurements representative of the real temperature of at least one capacity of the DCLINK module 400, MTrelcap_M with the average value of the measurements representative of the temperature of the liquid circulating in the cooling module 800, MTL_M.

[0061] In the case where the result of the comparison, or subtraction, is less than a first temperature delta value PVDT1 then the method provides for the transition to a twelfth step S12); in the case where the result of the comparison, or subtraction, is greater than the first temperature delta value PVDT1 then the method provides for the transition to a thirteenth step S13). For example, the value of the first temperature delta value PVDT1 is 15°C.

[0062] In the twelfth step S12), the method provides for a reduction in the charging setpoint current for a reduction in the charger setpoint power of 20%. The method then proposes moving to the third step S3).

[0063] During the thirteenth step S13), the method provides, in the case where the result of the comparison, or subtraction, is less than a second delta temperature value PVDT2, the transition to a fourteenth step S14); in the case where the result of the comparison, or subtraction, is greater than the second delta temperature value PVDT2 then the method provides the transition to a fifteenth step S15).

[0064] For example, the second temperature delta value PVDT2 is 20°C.

[0065] In the fourteenth step S14), the method provides for a reduction in the charging setpoint current for a reduction in the charger setpoint power of 50%. The method then proposes moving to the third step S3).

[0066] During the fifteenth step S15), the method provides for a complete cut-off of the charging setpoint current, in other words the charging is stopped. The method then proposes moving to the third step S3).

[0067] Thanks to the invention and its method detailed above, it is possible to control the temperature to extend the useful life of the capacitors of the DCLINK 400 module by avoiding making them rise in temperature and cleverly, the useful life of the capacitors is taken into consideration. Thus, by reducing or lowering the threshold temperature of the capacitors during charging to a level below the level of the critical threshold temperature of said capacitors, the latter suffer less damage. temperature-related deteriorations and are therefore more in a mode of use allowing the lifespan of said capacities to be extended.

[0068] Alternatively, as long as the second counter Compt_vie_charg_2 does not exceed the value of 5000 hours, the method only proposes to limit the charging of the high voltage battery 600 by controlling only the temperature of the capacities and, when the second counter Compt_vie_charg_2 exceeds the value of 5000 hours, the method also proposes to regulate the power when charging the high voltage battery 600. Thus, the duration of use of the charger is extended by taking all precautions so that the capacities of the DCLINK module 400 do not exceed the critical temperature and so that the power is also controlled. Of course, this solution makes it possible to extend the duration of use of the charger 100 but can cause inconvenience to the user because the charging time is extended but, in return, the ecological impact is improved. Indeed, the charger is not changed but still used.

Claims

Claims

1. Method for optimizing the lifetime of at least one capacitor of a DCLINK module (400) of an electronic device (100), said electronic device (100) being adapted to charge a high voltage battery (600) of an electric vehicle, said device comprising a power factor correction circuit (300), a DC / DC DC converter (500), a cooling device (700) comprising at least one pipe adapted for the passage of a liquid, said device (700) being adapted to cool the at least one capacitor of the DCLINK module (400) using the liquid, a first temperature sensor (900) arranged at the at least one pipe of the cooling device (700), said first temperature sensor (900) being adapted to measure a temperature of the liquid,a second temperature sensor (910) arranged on at least one capacitance of the DCLINK module (400) and adapted to measure an actual temperature of said at least one capacitance, said method comprising the following steps:, • a first step S1) consisting of charging the high voltage battery (600) with a set power (Pcons) determined during a first determined duration of use of the electronic device (100), and consisting of executing a fourth step S4) after exceeding the first duration of use of the electronic device (100), • a third step S3) consisting of activating and incrementing a second counter (Compt_vie_charg_2), • the fourth step S4) consisting of recording a first measurement (MTrelcap_l) representative of the actual temperature of at least one capacity of the DCLINK module (400) using the second temperature sensor (910), and recording using the first temperature sensor (900) a first measurement representative of the temperature of the liquid (MTL_1) circulating in the cooling module (700), • a sixth step S6) consisting of averaging n measurements representative of the actual temperature of at least one capacity of the DCLINK module (400) using the second temperature sensor (910) (MTrelcap_M), and averaging n measurements representative of the temperature of the circulating liquid (MTL_M) in the cooling module (700), a seventh step S7) consisting of comparing the average value of the measurements representative of the actual temperature of at least one capacity (MTrelcap_M) with a critical capacity threshold temperature (Tcritcap) and in the case where the result of the comparison is negative, executing an eighth step S8), otherwise the execution of a ninth step S9), the eighth step S8), consisting of charging the high voltage battery (600) with the set power (Pmax) determined before the execution of the third step S3), the ninth step S9), consisting of comparing the average value of the measurements representative of the actual temperature of at least one capacity (MTrelcap_M) with the average value of the measurements representative of the temperature of the liquid (MTL_M), and in the case where the result of the comparison is negative, execute the eighth step S8), otherwise execute a tenth step S10), the tenth step S10), consisting of comparing the average value (MTL_M) of the measurements representative of the temperature of the liquid with a first threshold coolant value (Tliqseuill), and in the case where the result of the comparison is negative then executing the third step S3), otherwise executing an eleventh step SU), the eleventh step SI 1), consisting of comparing the average value of all the values ​​of the measurements representative of the actual temperature of at least one capacity (MTrelcap_M) with the average value of the measurements representative of the temperature of the liquid (MTL_M), and in the case where the result of the comparison is lower than a first temperature delta value (PVDT1) then executing a twelfth step S12); otherwise executing a thirteenth step S13), the twelfth step S12) consisting of reducing the setpoint power (Pcons) by a value of n% before executing the third step S3), the thirteenth step S13) consisting of comparing the average value of all the values ​​of the measurements representative of the real temperature of at least one capacity (MTrelcap_M) with the average value of the measurements representative of the tem- liquid temperature (MTL_M), and, in the case where the result of the comparison is less than a second temperature delta value (PVDT2), then execute a fourteenth step S14); otherwise a fifteenth step S15), • the fourteenth step S14), consisting of reducing the setpoint power (Pcons) by a value of m% before executing the third step S3), • the fifteenth step S15), consisting of cutting the setpoint power (Pcons) before executing the third step S3).

2. Method for optimizing the lifetime of at least one capacity of a DCLINK module (400) of an electronic device (100), in which the maximum setpoint power (Pcons) is the nominal power of the electronic device (100).

3. Method for optimizing the lifetime of at least one capacitance of a DCLINK module (400) of an electronic device (100), according to claim 1 or 2 in which the critical capacitance threshold temperature (Tcritcap) is equal to 50°C.

4. Method for optimizing the lifetime of at least one capacitor of a DCLINK module (400) of an electronic device (100), according to any one of claims 1 to 3 wherein the first threshold coolant value (Tliqseuill) is equal to 50°C.

5. Method for optimizing the lifetime of at least one capacitor of a DCLINK module (400) of an electronic device (100) according to any one of claims 1 to 4 wherein the first temperature delta value (PVDT1) is equal to 15°C.

6. Method for optimizing the lifetime of at least one capacitor of a DCLINK module (400) of an electronic device (100) according to any one of claims 1 to 5 in which the value of n% of the reduction in the setpoint power (Pcons) is equal to 20%.

7. Method for optimizing the lifetime of at least one capacitor of a DCLINK module (400) of an electronic device (100) according to any one of claims 1 to 6 in which the value of m% of the reduction in the setpoint power (Pcons) is equal to 50%.

8. Method for optimizing the lifetime of at least one capacitance of a DCLINK module (400) of an electronic device (100) according to any one of claims 1 to 7 wherein the second delta value PVDT2 temperature is equal to 20°C.

9. Method for optimizing the lifetime of at least one capacity of a DCLINK module (400) of an electronic device (100) according to any one of claims 1 to 8 in which the first determined duration of use of the electronic device (100) is equal to 20,000 hours.

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