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

Abstract

The invention relates to a method for optimizing the lifespan of at least one capacitor in 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) disposed on at least one capacitor of the capacitor module (400) and adapted to measure the 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), and initializing a first power variable (Pinf). Figure for the abstract: Fig 3

Description

Title of the invention: Method for optimizing the lifespan of at least one suitable 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. Previous technique

[0002] An electric vehicle comprises at least one high-voltage battery, for example a 400-volt or 800-volt battery, connected to a high-voltage electrical network (the electric vehicle's internal network), and one low-voltage battery, for example a 12-volt battery, connected to a low-voltage electrical network (the electric vehicle's internal network). Both the high-voltage and low-voltage batteries are adapted to deliver and store electrical energy, respectively, on the high-voltage and low-voltage electrical networks.

[0003] To achieve this, the electric vehicle includes an on-board charger, more commonly known as an OBC (On-Board Charger), connected to the high-voltage battery, designated "BHT," via the high-voltage electrical network. The on-board charger is designed, once connected to a power supply network, to convert the alternating voltage supplied by an external electrical network into a high-voltage direct current suitable for recharging the high-voltage battery.

[0004] Fig. 1 represents a schematic diagram of a state-of-the-art on-board electric charger 10 adapted to charge the high-voltage battery 60 dedicated, for example, to powering an electric machine for the propulsion of an electric or hybrid vehicle.

[0005] The on-board electric charger 10 includes an electromagnetic filtering circuit 20 and a power factor correction circuit 30, referred to as "PFC," which may be bidirectional. This power factor correction circuit 30 further includes an AC-DC converter circuit adapted to receive, for example, an electrical current from a domestic AC power supply.

[0006] The on-board electric charger 10 also includes a capacity module 40 disposed 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 those skilled in the art know, the charge of the low-voltage power supply battery, not shown in [Fig.l], is carried out 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 supply battery.

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

[0009] The capacitance module 40 is composed of a determined number of electrochemical capacitances whose equivalent value is relatively large to accept a relatively large effective current value during battery charging 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 well-known solution for those skilled in the art to realize the capacitance module 40 is to implement a relatively large number of capacitances to obtain a large equivalent capacitance value to be able to both control 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] One disadvantage of this solution is the need to increase the surface area of ​​the printed circuit board or PCB to accommodate said capacities, significantly increasing the cost of the on-board charger 10.

[0012] Furthermore, the value of the effective current, and more specifically the maximum value of the effective current, depends on the battery's charge level and the charger's power. For example, an on-board charger may have a rated power of 7 kW.

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

[0014] For example, the critical capacity threshold temperature Tcritcap is 85°C. Thus, if, during the charging of the high-voltage battery by the charger, the temperature of the capacitors reaches or exceeds the critical capacity threshold temperature Tcritcap, then the lifespan of said capacitors is reduced compared to using said capacitors at temperatures below the critical capacity threshold temperature Tcritcap.

[0015] To limit the temperature rise of the capacitors in the capacitance module 40, it is common to use a cooling device placed, for example, on said capacitance module 40. The cooling device is adapted to cool the Capacities are dissipated through the capacitor module 40, and also to cool electronic components located on the printed circuit board of the onboard charger 10. Such a solution can utilize air cooling. However, since the amount of heat to be dissipated is relatively significant, the cooling system can also rely on a liquid cooling principle, i.e., water or glycol. This allows for improved heat dissipation from the electronic components and capacitors.

[0016] As mentioned above, it is necessary to control the lifespan of the capacities of the on-board charger 10 because the latter is given for a minimum period of use by the vehicle manufacturer, for example 20000 hours, under normal operating and charging 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 charging 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 service life.

[0018] There is therefore a real need to ensure temperature control of the capacities to avoid exceeding the critical temperature in order to avoid prematurely deteriorating said capacities. Description of the invention

[0019] The invention relates to a method for optimizing the lifespan of at least one capacitor in a capacitor module of an electronic device, said electronic device being adapted for charging a high-voltage battery of an electric vehicle, said device comprising a power factor correction circuit, a DC / DC converter, a cooling device adapted for cooling at least one capacitor of the capacitor module, a second temperature sensor disposed 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 a) consisting of activating the charger to charge the high-voltage battery, • a second step a2), consisting of incrementing a first counter to one and resetting a second counter to zero, and initializing a first power variable, • a third step a3) consisting of charging the high-voltage battery by the charger with an initial set power, to be initialized with a value equal to 100% of the value of the first set power second power variable, a fourth step a4) consisting of waiting for a first determined duration during which the setpoint power is delivered to the battery, then proceeding 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 capacitor representative of the temperature of all the capacitors in the capacitor module, comparing the first actual temperature to a first threshold value, and in the case where the value of the first actual temperature is less than the first threshold value then proceeding to a sixth step a6), and in the case where the value of the first actual temperature is greater than the first threshold value then proceeding 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 proceed to a seventeenth step a17); if not proceed 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 proceeding 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 proceeding 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 proceed to a twentieth step a20) and in the case where the value is less than or equal to 4 then proceed to the fourth step a4), the twentieth step a20) consisting of resetting the value of the first counter and the value of the second counter, a twenty-first step a21) consisting of comparing the current setpoint power to the maximum setpoint power value; if the current setpoint power value is between 75% and 100% of the maximum setpoint power value, then proceed to a twenty-second step a22; otherwise, proceed to a twenty-third step a23. The twenty-third step a23) consisting of, if the current setpoint power value is between 50% and 75% of the maximum setpoint power value, proceeding to a twenty-fourth step a24; otherwise, proceed to a twenty-fifth step a25), the twenty-second step a22), consisting of the first power variable being equal to 50% of the maximum setpoint power value and the value of the second power variable being equal to the value of the current setpoint power applied to the battery, then proceeding to the fourth step a4), the twenty-fourth step a24), consisting of the first power variable being equal to 25% of the maximum setpoint power value and the value of the second power variable being equal to the value of the current setpoint power applied to the battery, then proceeding to the fourth step a4), the twenty-fifth step a25), consisting of the first power variable being equal to 0% of the maximum setpoint power value and the value of the second power variable being equal to the current setpoint power value applied to the battery, then proceed 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) to the maximum value of the setpoint power that can be generated by the charger, and if the value of the setpoint power applied to the battery is equal to the value of the maximum setpoint power of the charger then proceed to the fourth step a4), and if the value of the setpoint power applied to the battery is less than the value of the maximum setpoint power of the charger then proceed to an eighth step a8), the eighth step a8), consisting of incrementing the value of the first counter by one and resetting the second counter to zero then proceeding 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 proceed 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 proceed to an eleventh step al 1) and in the case where the value is less than or equal to 4 proceed to the fourth step a4), the eleventh step al 1), consisting of setting the value of the first counter to zero and the value of the second counter also being set to zero, proceed to a twelfth step a 12), the twelfth step al2), consisting of comparing the setpoint 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 proceed to a thirteenth step (al3), and if the result of the comparison is less than half the maximum setpoint power value then proceed to a fourteenth step (al4), • the fourteenth step (al4), consisting of, in the case where the result of the com If the comparison result is less than half the maximum setpoint power value and is greater than a quarter of the maximum setpoint power value, proceed to a fifteenth step (al5). If the comparison result is less than a quarter of the maximum setpoint power value, then proceed to a sixteenth step (al6). • the thirteenth step a13), 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 proceeding to the fourth step a4), • the fifteenth step (a 15), consisting of setting the value of the second power variable to 75% of the maximum power value and the value of the first power variable to the current setpoint power applied to the battery, then proceeding to the fourth step (a4), • the sixteenth step (a 16), consisting of setting the value of the second power variable 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 proceed to the fourth step a4). For example, the first setpoint power has a value of 1 IkW.

[0020] In another 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 features and advantages of the invention will become apparent from the following description. This description is purely illustrative and should be read in conjunction with the accompanying drawings, in which:

[0024] Fig. 1 is a structural illustration of a prior art charger,

[0025] Fig. 2 presents 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 implementation methods

[0027] The invention will be presented in the case of implementation in a vehicle electric comprising at least one electric machine capable of converting electrical energy into mechanical energy in order to rotate at least one wheel of the electric vehicle.

[0028] With reference to [Fig. 2], a schematic diagram of an electronic device 100 is shown, 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 powering a three-phase machine for the propulsion of an electric or hybrid vehicle.

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

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

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

[0032] As those skilled in the art know, the charging of the low voltage 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 supply battery.

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

[0034] Cleverly, the capacitance module 400 is composed of a determined number of capacitors, for example electrochemical capacitors, adapted to accept a relatively high effective current value during battery charging 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 includes a cooling device 800 located, for example, on the capacitor module 400, but also on the power factor correction circuit 300 and on the DC / DC converter 500. The cooling device 800 includes, for example, at least one suitable channel for circulating a coolant. The coolant is suitable for absorbing heat from the heating of the electronic components of the 300 power factor correction circuit and the 500 DC / DC converter, but also adapted to absorb the heat generated by the capacitance of the 400 capacitance module. The mechanical fixing and thermal coupling between the different elements are obvious to a person skilled in the art.

[0036] Advantageously, a first temperature sensor 900 is located on the cooling device 800 pipe, enabling measurements of the coolant temperature Tliq. In an alternative embodiment, the coolant temperature is provided by measuring means located on the electric vehicle's cooling circuit.

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

[0038] The first temperature sensor 900 and the second temperature sensor 910 can use thermistor-type technology or, alternatively, semiconductor technology.

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

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

[0041] In a second step a2), a first counter Cmpl is then incremented to one and a second counter Cmp2 is reset to zero. The first counter Cmpl represents, within the framework of the invention, an increase in the value of a setpoint power P_cons and the second counter Cmp2 represents a decrease 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 particular 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 setpoint power Pcons.

[0044] In 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 for 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 process 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 example embodiment the first determined duration tpi has a value of one minute.

[0046] The process proposes, after the elapsed 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 capacitor representative of the temperature of all the capacitors in the capacitor module 400. The method also proposes, in this fifth step a5), to compare the first actual temperature Trelcapl to 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 less than the first threshold value Tseuill, the process proposes a transition to a sixth step a6). In the case where the value of the first actual temperature Trelcapl is greater than the first threshold value Tseuill, the process proposes a transition to a seventh step a7).

[0049] During the seventh step a7), if, 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. If the value of the first threshold value Tseuill is greater than the second threshold value Tseuil2, then the process proposes a seventeenth step a1a7); otherwise, the process proposes a 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 proceed 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, if the value of the first power variable Pinf is equal to 0% of the maximum setpoint power (which, as a reminder, is 11kW in our specific case), then the value of the first power variable Pinf will be 0kW. Therefore, the value of the new setpoint power P(n) will be 50% of the maximum setpoint power P_cons, or 5.5kW. The second power variable Psup will take the value of the previous setpoint power, that is, P(nl)_cons.

[0052] During the nineteenth step (a19), the value of the second counter Cmp2 is monitored. If said value is greater than 4, then the process proposes proceeding to a twentieth step (a20), and if the value is less than or equal to 4, then the process proposes proceeding to the fourth step (a4).

[0053] During 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 that after this reset of the two counters, the transition 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., 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 process proposes to proceed to a twenty-second step a22); otherwise, it proposes to proceed 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 maximum setpoint power value then the process proposes to proceed to a twenty-fourth step a24), otherwise it proposes to proceed to a twenty-fifth step a25).

[0057] In 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 process then proposes to proceed to the fourth step a4).

[0058] In 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 process then proposes to proceed to the fourth step a4).

[0059] In 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 process then proposes to proceed 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) to 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 proceeding 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 proceeding to an eighth step a8).

[0062] Then, in the eighth step a8), the value of the first counter Cmpl is incremented by one and the second counter Cmp2 is set to zero. It is then proposed to proceed 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, if the value of the second power variable Psup is equal to 50% of the maximum setpoint power (which, as a reminder, is 1 kW in our specific case), then the value of the second power variable Psup will be 5.5 kW. Therefore, the value of the new setpoint power will be (5.5 + 2.75) / 2 = 4.125 kW. The first power variable Pinf will take the value of the previous setpoint power, i.e., P(nl)_cons. It is then proposed to proceed to step a10).

[0064] During the tenth step a10), the value of the first counter Cmpl is checked. If said value is greater than 4, then the process proposes to proceed to an eleventh step a11), and if the value is less than or equal to 4, then the process proposes to proceed to the fourth step a4).

[0065] During 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 that after this reset of the two counters, the passage to a twelfth step a 12).

[0067] During the twelfth step al2), the current setpoint power Pn_Cons is compared to the value of the maximum setpoint power P_cons. If the value of the If the current setpoint power is between 50% and 100% of the maximum setpoint power value, then the process proposes a thirteenth step (a13). If the result of the comparison is less than half the maximum setpoint power value (P_cons), then the process proposes a fourteenth step (a14).

[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 one quarter of the value of the maximum setpoint power P_cons, then the method proposes to proceed to a fifteenth step (al5). In the case where the result of the comparison is less than one quarter of the value of the maximum setpoint power P_cons, then the method proposes to proceed to a sixteenth step (al6).

[0069] In the thirteenth step a1a3), 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 process then proposes the transition to the fourth step a4).

[0070] In the fifteenth step a1a5), it is proposed that the value of the second power variable Psup is equal to 75% of the maximum power value 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 process then proposes to proceed to the fourth step a4).

[0071] In the sixteenth step a1a6), 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 process then proposes to proceed to the fourth step a4).

Claims

1. Demands A method for optimizing the lifespan of at least one capacitor in 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 converter (500), a cooling device (700) adapted to cool at least one capacitor of the capacitor module (400), a second temperature sensor (910) disposed 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 (Cmpl) to one and resetting a second counter (Cmp2), 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 a second power variable (Psup) with a value equal to 100% of the value of the first setpoint power, • 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), then proceeding 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 capacitor representative of the temperature of all the capacitors in the capacitor module (400), comparing the first actual temperature (Trelcapl) to a first threshold value (Tseuill), and if the value of the first actual temperature (Trelcapl) is less than the first threshold value (Tseuill) then proceeding to a sixth step a6), and if the value of the first tem If the actual temperature (Trelcapl) is greater than the first threshold value (Tseuill), then proceed to a seventh step (a7). In the seventh step (a7), if, in 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). If the value of the first threshold value (Tseuill) is greater than the second threshold value (Tseuil2), then proceed to a seventeenth step (a1a7); if not, proceed to the fourth step (a4). the seventeenth step a17), consisting of incrementing the value of the second counter (Cmp2) by one and setting the value of the first counter (Cmpl) to zero, proceed to an eighteenth step a18), 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 proceeding 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 proceed to a twentieth step a20) and in the case where the value is less than or equal to 4 then proceed to the fourth step a4), the twentieth step a20) consisting of setting 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) to 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 proceed to a twenty-second step a22), otherwise proceed 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 maximum setpoint power value, proceeding to a twenty-fourth step a24), otherwise proceeding to a twenty fifth step a25), the twenty-second step a22), consisting of the first power variable (Pinf) being equal to 50% of the maximum setpoint power value (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 proceed to the fourth step a4), the twenty-fourth step a24), consisting of the first power variable (Pinf) being equal to 25% of the maximum setpoint power value (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 proceeding to the fourth step a4), the twenty-fifth step a25), consisting of ensuring that the first power variable (Pinf) is equal to 0% of the maximum setpoint power value (P_cons) and that the value of the second power variable (Psup) is equal to the current setpoint power value applied to the battery (600), then proceed to the fourth step a4), the sixth step a6), consisting of comparing the setpoint power value (P_cons) applied to the battery (600) during the fourth step a4) to the maximum setpoint power value that can be generated by the charger (100), and if the setpoint power value (P_cons) applied to the battery (600) is equal to the maximum setpoint power value of the charger, then proceed to the fourth step a4), and if,the setpoint power value (P_cons) applied to the battery (600) is less than the maximum setpoint power value of the charger, so proceed 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 proceeding 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 proceeding to a tenth step a10), the tenth step (a 10), consisting of scrutinizing the value of the first counter (Cmpl), and in the case where said value is greater than 4 then proceed to an eleventh step al 1) and in the case where the value is less than or equal to 4 proceed to the fourth step a4), the eleventh step a1), consisting of setting the value of the first counter (Cmpl) to zero and the value of the second counter (Cmp2) also to zero, then proceeding to a twelfth step a12), the twelfth step al2), consisting of comparing the current setpoint power (Pn_Cons) to the maximum setpoint power value (P_cons), if the value of the current setpoint power is between 50% and 100% of the maximum setpoint power value then proceed to a thirteenth step a 13), and if the result of the comparison is less than half the value of the maximum setpoint power (P_cons) then proceed 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 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), proceed 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 proceed to a sixteenth step al6), the thirteenth step a13), 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 proceeding 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 maximum power value (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 proceeding to the fourth step a4, the sixteenth step a 16), consisting of the value of the second power variable (Psup) being equal to 50% of the the maximum power value (P_cons) and the value of the first power variable (Pinf) should be equal to the current setpoint power value applied to the battery (600), then proceed to the fourth step a4).

2. A 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 setpoint power (Pl_cons) has a value of 1 IkW.

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

4. A 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 (Tthreshold) has a value of 80°C.

5. A method for optimizing the lifetime of at least one capacity of a capacity module (400) of an electronic device (100) according to any one of claims 1 to 4, wherein the second threshold value (Tthreshold2) has a value of 80°C.

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