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

Abstract

The invention relates to a method for optimizing the lifetime of at least one capacitor of a capacitor module (400) of an electronic device (100), said electronic device (100) being adapted to charge a battery (600) of an electric vehicle, said device comprising a power factor correction circuit (300), a DC / DC converter (500), a cooling device (700), a second temperature sensor (910) arranged on at least one capacitor of the capacitor module (400) and adapted to measure an actual temperature of said at least one capacitor, the method comprising the following steps: a first step a1) consisting of activating the charger (100) to charge the high-voltage battery (600), a second step a2), consisting of incrementing a first counter (Cmp1) to one and resetting a second counter (Cmp2) to zero, initializing a first power variable (Pinf). Figure for abstract: Fig 3

Description

Title of the invention: Method for optimizing the lifespan of at least one capacity suitable 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 400 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 Volts, 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 high voltage electrical network and on the low 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, and a power factor correction circuit 30 called “PFC” which can 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 electric charger 10 also comprises a capacity module 40 arranged between the power factor correction circuit 30 and a direct-direct DC / DC 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 capacitor 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 capacitor module 40 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 capacitor module 40, the latter heat up and can sometimes reach temperatures equal to or greater than a critical capacitor threshold temperature Tcritcap which is given by the capacitor manufacturer.

[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 increase in the temperature of the capacitors of the capacitor module 40, it is common to use a cooling device arranged for example on said capacitor module 40. The cooling device is adapted to cool the capacities through the capacity module 40, 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 usage and recharging conditions.

[0017] However, sometimes, said charger 10 and therefore the capacities of the capacity 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 control of the temperature of the capacitors to avoid exceeding the critical temperature in order not to prematurely damage said capacitors. Statement of the invention

[0019] The invention relates to a method for optimizing the lifetime of at least one capacitor of a capacitor module of an electronic device, said electronic device being adapted to charge a high-voltage battery of an electric vehicle, said device comprising a power factor correction circuit, a DC / DC direct-direct converter, a cooling device adapted to cool at least one capacitor of the capacitor module, a second temperature sensor arranged on at least one capacitor of the capacitor module and adapted to measure an actual temperature of said at least one capacitor, the method comprising the following steps: • a first step al) consisting of activating the charger to charge the high voltage battery, • a second step a2), consisting of incrementing a first counter to one and setting a second counter to zero, initializing a first power variable, • a third step a3) consisting of charging the high voltage battery by the charger with a first set power, to be initialized with a value equal to 100% of the value of the first set power a second power variable, a fourth step a4) consisting of waiting for a first determined duration during which the set power is delivered to the battery, then moving on to a fifth step a5), the fifth step a5) consisting of measuring using the second temperature sensor a first actual temperature of at least one capacity representative of the temperature of all the capacities of the capacity module, comparing the first actual temperature to a first threshold value, and in the case where the value of the first actual temperature is lower than the first threshold value then moving to a sixth step a6), and in the case where the value of the first actual temperature is higher than the first threshold value then moving to a seventh step a7), the seventh step a7), in the case where, in the fifth step a5), the value of the first actual temperature is greater than the value of the first threshold value then compare the value of the first actual temperature to a second threshold value, and in the case where the value of the first threshold value is greater than the second threshold value then go to a seventeenth step al7); if not go to the fourth step a4), the seventeenth step al7), consisting of incrementing the value of the second counter by one and setting the value of the first counter to zero, then moving on to an eighteenth step al8), the eighteenth step al8), consisting of calculating the new setpoint power according to the following mathematical formula: P(n)_cons= (Pinf+P(nl)_cons) / 2, then moving on to a nineteenth step al9), the nineteenth step a 19), consisting of scrutinizing the value of the second counter, and in the case where said value is greater than 4 then moving on to a twentieth step a20) and in the case where the value is less than or equal to 4 then moving on to the fourth step a4), the twentieth step a20) consisting of setting the value of the first counter and the value of the second counter to zero, a twenty-first step a21) consisting of comparing the current setpoint power with the value of the maximum setpoint power, in the case where the value of the current setpoint power is between 75% and 100% of the value of the maximum setpoint power then go to a twenty-second step a22), otherwise go to a twenty-third step a23), the twenty-third step a23) consisting of, if the value of the current setpoint power is between 50% and 75% of the value of the maximum setpoint power, go to a twenty-fourth step a24), otherwise go to a twenty-fifth stage a25), the twenty-second step a22), consisting of the first power variable being equal to 50% of the value of the maximum setpoint power and the value of the second power variable being equal to the value of the current setpoint power applied to the battery, then moving on to the fourth step a4), the twenty-fourth step a24), consisting of the first power variable being equal to 25% of the value of the maximum setpoint power and the value of the second power variable being equal to the value of the current setpoint power applied to the battery, then moving on to the fourth step a4), the twenty-fifth step a25), consisting of the first power variable being equal to 0% of the value of the maximum setpoint power and the value of the second power variable being equal to the value of the current setpoint power applied to the battery, then moving on to the fourth step a4), the sixth step a6), consisting of comparing the value of the setpoint power applied to the battery during the fourth step a4) with the maximum value of the maximum setpoint power that can be generated by the charger, and in the case where the value of the setpoint power applied to the battery is equal to the value of the maximum setpoint power of the charger then go to the fourth step a4), and in the case where the value of the setpoint power applied to the battery is less than the value of the maximum setpoint power of the charger then go to an eighth step a8), the eighth step a8), consisting of incrementing the value of the first counter by one and setting the second counter to zero then go to a ninth step a9), the ninth step a9), consisting of calculating the new setpoint power with the mathematical formula: P(n)_cons= (Psup+P(nl)_cons) / 2 then moving on to a tenth step a 10), the tenth step a 10), consisting of scrutinizing the value of the first counter, and in the case where said value is greater than 4 then moving on to an eleventh step al 1) and in the case where the value is less than or equal to 4 moving on to the fourth step a4), the eleventh step al 1), consisting in that the value of the first counter is set to zero and the value of the second counter is also set to zero, move on to a twelfth step a 12), the twelfth step al2), consisting of comparing the set power current to the maximum setpoint power value, if the current setpoint power value is between 50% and 100% of the maximum setpoint power value then go to a thirteenth step al3), and if the result of the comparison is less than half of the maximum setpoint power value then go to a fourteenth step al4), • the fourteenth step al4), consisting of, in the case where the result of the com parison is less than half of the value of the maximum set power and is greater than a quarter of the value of the maximum set power, go to a fifteenth step al5), in the case where the result of the comparison is less than a quarter of the value of the maximum set power then go to a sixteenth step al6), • the thirteenth step al3), consisting of the value of the second power variable being equal to the value of the maximum power and the value of the first power variable being equal to the value of the current setpoint power applied to the battery, then moving on to the fourth step a4), • the fifteenth step a 15), consisting of the value of the second power variable being equal to 75% of the value of the maximum power and the value of the first power variable being equal to the value of the current setpoint power applied to the battery, then move on to the fourth step a4), • the sixteenth step a 16 ... power is equal to 50% of the maximum power value and the value of the first power variable is equal to the value of the current setpoint power applied to the battery, then go to the fourth step a4). For example, the first setpoint power has a value of 1 IkW.

[0020] In another exemplary embodiment of the invention, the first determined duration has a value of 1 minute.

[0021] For example, the first threshold value has a value of 80°C.

[0022] In another example, the second threshold value has a value of 80°C. Brief description of the drawings

[0023] 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:

[0024] [Fig.l] is a structural illustration of a prior art charger,

[0025] [Fig.2] shows a structural diagram of the charger according to the invention,

[0026] [Fig.3] is an illustration of the method according to the invention. Description of the embodiments

[0027] The invention will be presented in the case of an implementation in a vehicle electric 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.

[0028] With reference to [Fig. 2], there is shown a block diagram of an electronic device 100 which is for example an on-board electric charger 100 according to the invention. Said on-board electric charger 100 is adapted to charge the high voltage battery 600 dedicated for example to the power supply of a three-phase machine for the propulsion of an electric or hybrid vehicle.

[0029] The on-board electric charger 100 may be unidirectional or bidirectional.

[0030] The latter comprises an electromagnetic filtering circuit 200 and a circuit power factor corrector 300 called “PFC” which can be bidirectional, said power factor corrector circuit 300 comprising an AC-DC converter circuit adapted to receive an electric current from a domestic AC power supply network for example.

[0031] A capacity module 400 arranged between the power factor correction circuit 300 and a DC / DC converter 500 adapted to charge the high voltage battery 600. The capacity module 400 is also called by those skilled in the art “DC LINK” module.

[0032] 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.

[0033] The high voltage battery is charged using the on-board electric charger 100 once coupled to the electrical network.

[0034] Cleverly, the capacitor module 400 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.

[0035] The on-board charger 100 cleverly comprises a cooling device 800 arranged for example on the capacity module 400 but also on the power factor correction circuit 300 and on the DC / DC 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 coming 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 capacity module 400. The mechanical fixing and the thermal coupling between the different elements are obvious to those skilled in the art.

[0036] 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.

[0037] Advantageously, a second temperature sensor 910 is arranged on at least one capacitor of the capacitor module 400. Alternatively, the second temperature sensor 910 is arranged on a packaging of the capacitor module 400. The second temperature sensor 910 is adapted to measure the actual Trelcap temperature of at least one capacitor representative of the temperature of all the capacitors of the capacitor module 400. Thus, thanks to the device of the invention, it is possible to know the temperature in real time of the capacitor module 400 and, depending on this, to activate or not the on-board charger 100.

[0038] The first temperature sensor 900 and the second temperature sensor 910 may use thermistor technology or alternatively semiconductor technology.

[0039] The invention proposes a method for controlling the temperature of at least one capacitor by controlling the power delivered by an electronic device 100 as a function of an actual temperature of at least one capacitor of said electronic device 100.

[0040] To do this, the method of the invention comprises and as illustrated in [Fig.3] in the case where the electric vehicle is coupled to an external voltage outlet and recharging of the high voltage battery 600 is necessary, a first step a1) consisting of activating the charger 100 to charge the high voltage battery 600.

[0041] Then, during a second step a2), a first counter Cmpl is incremented to one and a second counter Cmp2 is set to zero. The first counter Cmpl is representative, within the framework of the invention, of a rise in the value of a setpoint power P_cons and the second counter Cmp2 is representative of a fall in the value of the setpoint power P_cons.

[0042] Thus, after the second step a2) Cmpl=l and Cmp2=0.

[0043] In the second step a2) a first power variable Pinf is also initialized. In this case, the first variable Pinf is set to 0. In the remainder of the description, the value of the first power variable Pinf will be between 0% and 100% of the maximum set power Pcons.

[0044] During a third step a3) the high voltage battery 600 is charged by the charger 100 with a first setpoint power Pl_cons. For example, the first setpoint power Pl_cons is that determined by the vehicle manufacturer in the case of optimal charging of the battery 600. For example, in the case of a 1 IkW charger the first setpoint power Pl_cons has a value of 1 IkW. In this third step a3) a second power variable Psup is also initialized with a value equal to 100%. In the remainder of the description, the value of the second power variable Psup will be between 0% and 100% of the maximum setpoint power Pcons.

[0045] The method then proposes a fourth step a4) consisting of waiting for a first determined duration tpi during which the setpoint power P_cons is delivered to the battery 600. In an exemplary embodiment, the first determined duration tpi has a value of one minute.

[0046] The method proposes, after the elapse of the time of the first determined duration tpi, the transition to a fifth step a5).

[0047] The fifth step a5) consists of measuring, using the second temperature sensor 910, a first actual temperature Trelcapl of at least one capacitance representative of the temperature of all the capacitances of the capacitance module 400. The method also proposes, during this fifth step a5), to compare the first actual temperature Trelcapl with a first threshold value Tseuill. For example, the value of the first threshold value Tseuill is equal to 80°C. Alternatively, the first actual temperature Trelcapl is an average of n temperature measurements from the second temperature sensor 910.

[0048] In the case where the value of the first actual temperature Trelcapl is lower than the first threshold value Tseuill, the method proposes moving to a sixth step a6). In the case where the value of the first actual temperature Trelcapl is higher than the first threshold value Tseuill, the method proposes moving to a seventh step a7).

[0049] During the seventh step a7), in the case where, in the fifth step a5), the value of the first actual temperature Trelcapl is greater than the value of the first threshold value Tseuill, the value of the first actual temperature Trelcapl is compared to a second threshold value Tseuil2. For example, the value of the second threshold value Tseuil2 is 85°C. In the case where the value of the first threshold value Tseuill is greater than the second threshold value Tseuil2 then the method proposes the passage to a seventeenth step al7); if not the method proposes the passage to the fourth step a4).

[0050] During the seventeenth step al7), the value of the second counter Cmp2 is incremented by one and the value of the first counter Cmpl is set to zero. It is then proposed to move on to an eighteenth step al8).

[0051] In the eighteenth step al8), the new setpoint power Pn_cons is equal to the following mathematical formula: P(n)_cons= (Pinf+P(nl)_cons) / 2. Thus, for example, in the case where the value of the first power variable Pinf is equal to 0% of the value of the maximum setpoint power (as a reminder, this value is 1 IkW in our specific case), then the value of the first power variable Pinf will be OkW. Thus, the value of the new setpoint power P(n) will be 50% of the value of the maximum setpoint power P_cons, i.e. 5.5kW. The second power variable Psup will take the value of the previous setpoint power, i.e. P(nl)_cons.

[0052] During the nineteenth step al9), the value of the second counter Cmp2 is scanned. In the case where said value is greater than 4 then the method proposes the passage to a twentieth step a20) and in the case where the value is less than or equal to 4 then the method proposes the passage to the fourth step a4).

[0053] In the twentieth step a20) the value of the first counter Cmpl is set to zero and the value of the second counter Cmp2 is also set to zero. Thus, Cmpl=0 and Cmp2=0.

[0054] It is proposed to move after this resetting of the two counters to a twenty-first step a21).

[0055] During the twenty-first step a21), the current setpoint power Pn_Cons is compared to the value of the maximum setpoint power P_cons, i.e., as a reminder, 1 IKW. If the value of the current setpoint power is between 75% and 100% of the value of the maximum setpoint power, then the method proposes moving to a twenty-second step a22), otherwise it is proposed moving to a twenty-third step a23).

[0056] During the twenty-third step a23) if the value of the current setpoint power is between 50% and 75% of the value of the maximum setpoint power then the method proposes moving to a twenty-fourth step a24), otherwise it proposes moving to a twenty-fifth step a25).

[0057] During the twenty-second step a22), it is proposed that the first power variable Pinf be equal to 50% of the value of the maximum setpoint power P_cons and the value of the second power variable Psup be equal to the value of the current setpoint power applied to the battery 600. The method then proposes moving to the fourth step a4).

[0058] During the twenty-fourth step a24), it is proposed that the first power variable Pinf be equal to 25% of the value of the maximum setpoint power P_cons and the value of the second power variable Psup be equal to the value of the current setpoint power applied to the battery 600. The method then proposes moving to the fourth step a4).

[0059] During the twenty-fifth step a25), it is proposed that the first power variable Pinf be equal to 0% of the value of the maximum setpoint power P_cons and the value of the second power variable Psup be equal to the value of the current setpoint power applied to the battery 600. The method then proposes moving to the fourth step a4).

[0060] During the sixth step a6), the method of the invention proposes to compare the value of the setpoint power P_cons applied to the battery 600 during the fourth step a4) with the maximum value of the maximum setpoint power that can be generated by the charger 100. For example, in the case of a 1 IkW charger, the maximum setpoint power P_cons has a maximum value of 1 IkW.

[0061] In the case where the value of the setpoint power P_cons applied to the battery 600 is equal to the value of the maximum setpoint power of the charger, the method proposes moving to the fourth step a4). In the case where the value of the setpoint power P_cons applied to the battery 600 is less than the value of the maximum setpoint power of the charger, the method proposes moving to an eighth step a8).

[0062] The value of the first counter Cmpl is then incremented by one during the eighth step a8) and the second counter Cmp2 is set to zero. It is then proposed to move on to a ninth step a9).

[0063] In the ninth step a9) the new setpoint power Pn_cons is equal to the following mathematical formula: P(n)_cons= (Psup+P(nl)_cons) / 2. Thus, for example in the case where the value of the second power variable Psup is equal to 50% of the value of the maximum setpoint power (as a reminder this value is 1 IkW in our specific case), then the value of the second power variable Psup will be 5.5kW. Thus, the value of the new setpoint power will be (5.5 + 2.75) / 2= 4.125kW. The first power variable Pinf will take the value of the previous setpoint power, i.e. P(nl)_cons. It is then proposed to move on to step a10).

[0064] During the tenth step al0) the value of the first counter Cmpl is scanned. In the case where said value is greater than 4 then the method proposes the transition to an eleventh step al 1) and in the case where the value is less than or equal to 4 then the method proposes the transition to the fourth step a4).

[0065] In the eleventh step al 1) the value of the first counter Cmpl is set to zero and the value of the second counter Cmp2 is also set to zero. Thus, Cmpl=0 and Cmp2=0.

[0066] It is proposed to move after this resetting of the two counters to a twelfth step a 12).

[0067] During the twelfth step al2) the current setpoint power Pn_Cons is compared with the value of the maximum setpoint power P_cons. If the value of the current setpoint power is between 50% and 100% of the maximum setpoint power value then the process proposes moving to a thirteenth step al3). If the result of the comparison is less than half of the maximum setpoint power value P_cons then the process proposes moving to a fourteenth step a 14).

[0068] During the fourteenth step al4) the method proposes in the case where the result of the comparison is less than half the value of the maximum setpoint power P_cons and is greater than a quarter of the value of the maximum setpoint power P_cons then the method proposes the passage to a fifteenth step al5). In the case where the result of the comparison is less than a quarter of the value of the maximum setpoint power P_cons then the method proposes the passage to a sixteenth step al6).

[0069] During the thirteenth step al3) it is proposed that the value of the second power variable Psup is equal to the value of the maximum power P_cons and the value of the first power variable Pinf is equal to the value of the current setpoint power applied to the battery 600. The method then proposes moving to the fourth step a4).

[0070] During the fifteenth step al5) it is proposed that the value of the second power variable Psup is equal to 75% of the value of the maximum power P_cons and the value of the first power variable Pinf is equal to the value of the current setpoint power applied to the battery 600. The method then proposes moving to the fourth step a4).

[0071] During the sixteenth step al6) it is proposed that the value of the second power variable Psup is equal to 50% of the value of the maximum power P_cons and the value of the first power variable Pinf is equal to the value of the current setpoint power applied to the battery 600. The method then proposes moving to the fourth step a4).

Claims

1. Claims Method for optimizing the lifetime of at least one capacitor of a capacitor 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 direct-direct converter (500), a cooling device (700) adapted to cool at least one capacitor of the capacitor module (400), a second temperature sensor (910) arranged on at least one capacitor of the capacitor module (400) and adapted to measure an actual temperature of said at least one capacitor, the method comprising the following steps: • a first step al) consisting of activating the charger (100) to charge the high voltage battery (600), • a second step a2), consisting of incrementing a first counter (Cmpl) to one and resetting a second counter (Cmp2) to zero, initializing a first power variable (Pinf), • a third step a3) consisting of charging the high voltage battery (600) by the charger (100) with a first setpoint power (Pl_cons), initializing with a value equal to 100% of the value of the first setpoint power a second power variable (Psup), • a fourth step a4) consisting of waiting for a first determined duration (tpi) during which the set power (P_cons) is delivered to the battery (600), then moving on to a fifth step a5), • the fifth step a5) consisting of measuring using the second temperature sensor (910) a first actual temperature (Trelcapl) of at least one capacity representative of the temperature of all the capacities of the capacity module (400), comparing the first actual temperature (Trelcapl) to a first threshold value (Tseuill), and in the case where the value of the first actual temperature (Trelcapl) is lower than the first threshold value (Tseuill) then moving on to a sixth step a6), and in the case where the value of the first tem actual temperature (Trelcapl) is greater than the first threshold value (Tseuill) then go to a seventh step a7), the seventh step a7), in the case where, at the fifth step a5), the value of the first actual temperature (Trelcapl) is greater than the value of the first threshold value (Tseuill) then compare the value of the first actual temperature (Trelcapl) to a second threshold value (Tseuil2), and in the case where the value of the first threshold value (Tseuill) is greater than the second threshold value (Tseuil2) then go to a seventeenth step al7); if not go to the fourth step a4), the seventeenth step al7), consisting of incrementing the value of the second counter (Cmp2) by one and setting the value of the first counter (Cmpl) to zero, moving on to an eighteenth step a 18), the eighteenth step al8), consisting of calculating the new setpoint power (Pn_cons) according to the following mathematical formula: P(n)_cons= (Pinf+P(nl)_cons) / 2, then moving on to a nineteenth step al9), the nineteenth step a 19), consisting of scrutinizing the value of the second counter (Cmp2), and in the case where said value is greater than 4 then moving on to a twentieth step a20) and in the case where the value is less than or equal to 4 then moving on to the fourth step a4), the twentieth step a20) consisting of setting to zero the value of the first counter (Cmpl) and the value of the second counter (Cmp2), a twenty-first step a21) consisting of comparing the current setpoint power (Pn_Cons) with the value of the maximum setpoint power (P_cons), in the case where the value of the current setpoint power is between 75% and 100% of the value of the maximum setpoint power then go to a twenty-second step a22), otherwise go to a twenty-third step a23), the twenty-third step a23) consisting of, if the value of the current setpoint power is between 50% and 75% of the value of the maximum setpoint power, moving to a twenty-fourth step a24), otherwise moving to a twenty fifth step a25), the twenty-second step a22), consisting of the first power variable (Pinf) being equal to 50% of the value of the maximum setpoint power (P_cons) and the value of the second power variable (Psup) being equal to the value of the current setpoint power applied to the battery (600), then moving on to the fourth step a4), the twenty-fourth step a24), consisting of the first power variable (Pinf) being equal to 25% of the value of the maximum setpoint power (P_cons) and the value of the second power variable (Psup) being equal to the value of the current setpoint power applied to the battery (600), then moving on to the fourth step a4), the twenty-fifth step a25), consisting of the first power variable (Pinf) being equal to 0% of the value of the maximum setpoint power (P_cons) and the value of the second power variable (Psup) being equal to the value of the current setpoint power applied to the battery (600), then moving on to the fourth step a4), the sixth step a6), consisting of comparing the value of the setpoint power (P_cons) applied to the battery (600) during the fourth step a4) with the maximum value of the maximum setpoint power that can be generated by the charger (100), and in the case where, the value of the setpoint power (P_cons) applied to the battery (600) is equal to the value of the maximum setpoint power of the charger then moving on to the fourth step a4), and in the case where,the value of the set power (P_cons) applied to the battery (600) is lower than the value of the maximum set power of the charger then go to an eighth step a8), the eighth step a8), consisting of incrementing the value of the first counter (Cmpl) by one and setting the second counter (Cmp2) to zero then moving on to a ninth step a9), the ninth step a9), consisting of calculating the new setpoint power (Pn_cons) with the mathematical formula: P(n)_cons= (Psup+P(nl)_cons) / 2 then moving on to a tenth step a 10), the tenth step (10) consists of examining the value of the first counter (Cmpl), and in the case where said value is greater than 4 then go to an eleventh step al 1) and in the case where the value is less than or equal to 4 go to the fourth step a4), the eleventh step al 1), consisting in that the value of the first counter (Cmpl) is set to zero and the value of the second counter (Cmp2) is also set to zero, then move on to a twelfth step a 12), the twelfth step al2), consisting of comparing the current setpoint power (Pn_Cons) with the value of the maximum setpoint power (P_cons), if the value of the current setpoint power is between 50% and 100% of the value of the maximum setpoint power then moving to a thirteenth step a 13), and if the result of the comparison is less than half of the value of the maximum setpoint power (P_cons) then moving to a fourteenth step al4), the fourteenth step a 14), consisting of, in the case where the result of the comparison is less than half of the value of the maximum setpoint power (P_cons) and is greater than a quarter of the value of the maximum setpoint power (P_cons), moving to a fifteenth step al5), in the case where the result of the comparison is less than a quarter of the value of the maximum setpoint power (P_cons) then moving to a sixteenth step al6), the thirteenth step al3), consisting of the value of the second power variable (Psup) being equal to the value of the maximum power (P_cons) and the value of the first power variable (Pinf) being equal to the value of the current setpoint power applied to the battery (600), then moving on to the fourth step a4), the fifteenth step a 15), consisting of the value of the second power variable (Psup) being equal to 75% of the value of the maximum power (P_cons) and the value of the first power variable (Pinf) being equal to the value of the current setpoint power applied to the battery (600), then moving on to the fourth step a4, the sixteenth step has 16), consisting in that the value of the second power variable (Psup) is equal to 50% of the value of the maximum power (P_cons) and the value of the first power variable (Pinf) is equal to the value of the current setpoint power applied to the battery (600), then go to the fourth step a4).

2. Method for optimizing the lifetime of at least one capacitor of a capacitor module (400) of an electronic device (100) according to claim 1, in which the first setpoint power (Pl_cons) has a value of 1 IkW.

3. Method for optimizing the lifetime of at least one capacitance of a capacitance module (400) of an electronic device (100) according to claim 1, wherein the first determined duration (tpi) has a value of 1 minute.

4. Method for optimizing the lifetime of at least one capacitor of a capacitor module (400) of an electronic device (100) according to claim 1, wherein the first threshold value (Tseuill) has a value of 80°C.

5. Method for optimizing the lifetime of at least one capacitor of a capacitor module (400) of an electronic device (100) according to any one of claims 1 to 4, wherein the second threshold value (Tseuil2) has a value of 80°C.

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