Method and system for managing an electric battery system in an electric or hybrid motor vehicle - Patents.com

Abstract

A system and method for managing a battery device that enables proactive limitation of the maximum authorized charge level depending on the vehicle's external conditions in order to optimize the battery device's useful life.

Description

Summary of the Invention

[0001] The present invention relates to a method and system for managing an electric battery device. The invention further relates to an electric or hybrid motor vehicle comprising said system and / or implementing said method.

[0002] A hybrid or electric motor vehicle comprises a battery arrangement, also called a battery, an electric energy storage device or a battery pack, capable of supplying electric energy to at least one element of the electric powertrain of the vehicle. In particular, battery arrangements currently used in electric or hybrid vehicles are mainly based on lithium-ion technology. In use, the battery arrangement is controlled and monitored by a dedicated management system, known as a battery management system or BMS, in order to monitor and control the state and operation of the various modules and cells that compose it. Such a system conventionally makes it possible to evaluate the state of charge or SOC of the arrangement, as well as its state of health or SOH, in particular its aging.

[0003] As is known, the aging of a battery device is exponentially accelerated when the battery device is at high temperatures due to its use and / or due to heating of the battery device by external ambient temperatures, in particular external ambient temperatures of the order of 45° C. or 50° C. Such aging is accompanied by a loss of capacity of the battery device as well as an increase in the internal resistance of the battery device. This leads to a considerable reduction in the useful life of the battery device, which may amount to several years. Vehicles are conventionally equipped with a thermal treatment system to cool the battery device, but said system only functions when the vehicle is in use, e.g. in a driving phase, a discharging phase or a charging phase, and not when the vehicle is stationary and stopped.

[0004] It has also been found that the aging of a battery device is prone to vary with state of charge at a given temperature. In particular, aging is accelerated when the battery device is at a level of charge of 100% corresponding to a maximum charge of the battery device's charge capacity, or at a level of charge approaching 100% for a state of charge significantly below such maximum capacity, thereby further reducing the useful life of the device. The magnitude of such reduction in useful life increases as temperature increases.

[0005] Because vehicles are likely to be stationary most of the time, or up to 90% or 95% of the time, it is extremely important to ensure that these periods of stationary are spent, as far as possible, under conditions that optimize the useful life of the battery equipment, especially when external conditions, and in particular the external ambient temperature, are likely to affect the battery equipment.

[0006] Patent application DE102019000813A1 describes a charging method in which the maximum state of charge can be continuously adjusted depending on the temperature to avoid accelerated aging of the battery. However, this solution is sensitive to short-term increases in temperature and often limits the maximum state of charge too much, while only long-term increases, e.g. heat waves, affect the aging of the battery.

[0007] The present invention belongs to this context and has the object of providing a method and a system for managing a battery arrangement which remedies the above-mentioned drawbacks, in particular ensuring improved management of the battery arrangement during rest phases between charging events.

[0008] According to the invention, a method allows managing an electric battery system for an electric or hybrid motor vehicle. The method comprises the steps of detecting an external ambient temperature of the vehicle using at least one sensor and comparing the measured external ambient temperature with a first predefined temperature threshold in predicting charging of the battery system. When the measured temperature is equal to or greater than the first threshold, the method: - activating an external temperature monitoring phase in order to measure the external ambient temperature at predetermined time intervals via at least one sensor and to record said measurements in a memory unit; - calculating the median or mean value of the external ambient temperature measurements made from time t0 of the activation of the monitoring phase and comparing said median or mean value with a second predefined temperature threshold and / or with a third predefined temperature threshold greater than the second threshold, - limiting the maximum authorized charge level of the battery pack via the control module to an intermediate charge level (N c_max_care ) programming the - further comprising the following steps, which are performed when the median or average temperature is lower than a second threshold value: programming a limit of the maximum authorized charge level of the device to a maximum charge level equal to the maximum charge capacity of the battery device, and interrupting the monitoring phase.

[0009] The method may include, following activation of the monitoring phase, determining the time that has elapsed since activation of the monitoring phase and comparing the determined elapsed time with a predefined minimum activation time threshold, the step of programming the adapted limit being performed only if the elapsed time is greater than or equal to the minimum activation time threshold.

[0010] The method may further include the steps of detecting light intensity outside the vehicle and comparing the measured light intensity to a predefined brightness threshold, and the step of programming the adapted limit is performed only when the measured light intensity level is equal to or greater than the predefined brightness threshold.

[0011] The method may further include the steps of measuring a temperature of the battery device and comparing the measured temperature with a predefined threshold to detect heating of the device, and the step of programming the limit to the intermediate charge level is performed only when the measured temperature of the battery device is equal to or greater than the threshold for detecting heating of the battery device.

[0012] The method may further include adjusting the time interval during which the measurements of the exterior ambient temperature are taken in response to at least one parameter exterior to the vehicle.

[0013] The method may include a step of detecting a need for mobility programmed or provided by a user prior to the step of programming the adapted limit, the execution of the step of programming the limit to an intermediate charge level being subject to said limit being accepted by the user of the vehicle.

[0014] According to the invention, a method makes it possible to charge a battery device, comprising in a first stage all the steps of the management method defined above and then a step of charging the battery device, during which the maximum authorized charging level is limited to a previously defined maximum charging level or an intermediate charging level.

[0015] The charging method may include the steps of detecting charging of the vehicle and interrupting the monitoring phase as soon as charging is performed.

[0016] According to the invention, a system makes it possible to manage an electric battery arrangement including hardware and / or software elements implementing the management method defined above, the hardware elements including at least one external ambient temperature sensor, a processing unit capable of receiving measurement results from the at least one sensor, a memory unit and a control module for controlling the battery arrangement.

[0017] According to the invention, a hybrid or electric motor vehicle includes at least one electric battery device and a management system as defined above.

[0018] According to the invention, a computer program product comprises program code instructions recorded on a computer readable medium for performing one and / or another step of the method defined above and / or for performing steps of the method defined above, when said program is run on a computer.

[0019] According to the invention, a computer program product which can be downloaded from a communications network and / or recorded on a computer-readable and / or computer-executable data medium is characterized in that it contains instructions which, when executed by a computer, cause said computer to carry out one of the methods defined and / or another method.

[0020] The invention further relates to a computer readable data storage medium having recorded thereon a computer program comprising program code instructions for carrying out one of the specified methods and / or another of the methods, or to a computer readable storage medium comprising instructions which, when executed by a computer, cause said computer to carry out one of the specified methods and / or another of the methods.

[0021] The invention further relates to a signal on a data carrier, carrying a computer program product as defined above.

[0022] Other details, features and advantages will become more clearly apparent on reading the detailed description given below, by way of indication and without limitation, with respect to various exemplary embodiments illustrated in the following drawings, in which: [Brief description of the drawings]

[0023] [Figure 1]FIG. 1 is a diagram illustrating an embodiment of a vehicle equipped with a management system for managing a battery device. [Diagram 2] 1 is a flowchart of one exemplary implementation of a method for managing a battery device. [Diagram 3] 3 is a flow chart of one particular exemplary implementation of the method for the battery device shown in FIG. 2. [Figure 4] 1 is a set of graphs detailing one exemplary execution of the management method as a function of time. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] 1 shows a schematic diagram of one exemplary embodiment of an electric or hybrid motor vehicle 1 according to the present invention. The vehicle 1 may be of any type, i.e. a private car, a commercial vehicle, a truck or a bus. The vehicle may further be an autonomous or non-autonomous vehicle.

[0025] The vehicle 1 comprises an electric battery arrangement 2, also called a battery, an electric energy storage device or a battery pack, configured to supply electric energy to one or more elements of an electric drivetrain (not shown) of the vehicle 1. For example, the electric battery arrangement 2 may power an electric motor. The battery arrangement 2 includes a number of modules, each of which includes a number of electrochemical cells, in particular lithium-ion cells.

[0026] The vehicle 1 further comprises a management system 3 for managing the battery arrangement 2. The management system 3 comprises hardware and / or software elements implementing the management method described below. The hardware elements comprise a processing unit 4 and one or more sensors 5 for measuring the external ambient temperature of the vehicle 1. The system may further comprise a memory unit 6 and a control module 7 for controlling the battery arrangement 2.

[0027] The processing unit 4 includes at least one computer including hardware and software resources, more specifically at least one processor or microprocessor. The processing unit 4 cooperates with the memory unit 6 and is capable of receiving data transmitted by the one or more temperature sensors 5. The processing unit 4 is capable of executing instructions to implement a computer program.

[0028] The control module 7 is adapted to receive data and / or instructions from the processing unit 4. The control module 7 in particular determines the value N of the maximum authorized charge level of the device. c_max If necessary, the operation of the battery arrangement 2 can be modified to modify the temperature sensor 5 and to activate the at least one temperature sensor 5 to trigger the measurement process. The control module 7 may be, as a non-limiting example, an electronic controller of the vehicle.

[0029] Optionally, the management system 3 comprises: - at least one light intensity sensor 8 for sensing the light intensity outside the vehicle 1; at least one temperature sensor 9 for sensing the temperature of the battery device 2; - localization means 10 for locating the vehicle 1; - communication means 11 for communicating with connected devices and / or with a remote server; - a human-machine interface 12.

[0030] The management system 3 may, for example, include a single light intensity sensor 8, from which measurement results are transmitted to the processing unit 4. Alternatively, the management system 3 may include a number of said sensors 8 arranged at different points on the vehicle 1, and may then transmit the different light intensity measurement results to the processing unit 4, which extracts an average value from the different light intensity measurement results.

[0031] Similarly, the management system may include at least one temperature sensor 9 for sensing the temperature of the battery device 2. In particular, such a sensor 9 may be included in a BMS (Battery Management System) computer. The system may include a single sensor 9 measuring the temperature of the battery device 2 at one location, or alternatively, multiple sensors 9 measuring the temperatures of various modules and / or cells of the battery device 2, the temperatures then being transmitted to the processing unit 4, which extracts, based on said measurements, maximum and minimum values ​​of said temperature as well as a temperature average value representative of the temperature of the battery device 2. By way of example and for a more effective protection of the battery device 2, the maximum temperature may be selected and transmitted to the processing unit 4.

[0032] The localization means 10 allows to locate the vehicle 1 in the road infrastructure. The localization means 10 incorporates a localization system, for example, to provide an approximate location of the vehicle 1 and / or a high-definition map of the road infrastructure. In particular, the approximate location of the vehicle 1 may be provided by a GPS (global positioning system). Alternatively or additionally, the localization means 10 may be an on-board localization system on the vehicle 1, which constantly incorporates the movement of the vehicle 1.

[0033] The communication means 11 enable the vehicle 1 to receive data from a connected device, such as a phone, a watch or a calendar, via a low or high frequency wireless link, which may for example be a wireless link based on cellular, Bluetooth or Wi-Fi technology.

[0034] The human machine interface 12 may comprise a screen capable of broadcasting information regarding the progress of a method or the state of the battery device 2 without restriction.

[0035] 2 and 3 show one mode of execution of the method 100 for managing the battery device 2 in predicting the charging of the battery device 2. In other words, the method is essentially executed before charging the battery device 2, in particular normal charging, fast charging, ultra-fast charging or even called regenerative charging resulting from regenerative braking during a driving phase. The method may also be executed during a stationary phase when the vehicle is stopped or during a driving phase before a charging phase of the battery device. The method may further be imitated as a method for operating or using the management system 3 as described above.

[0036] Generally speaking, the method 100 includes, in predicting the charging of the battery device 2, detecting the external ambient temperature T amb The method includes a step E01 of detecting the external ambient temperature T. The detection step E01 may be initiated by the control module 7 periodically at predefined intervals, for example once or twice per day. The method is then in a phase comparable to standby, in which few measurements are carried out. The control module 7 triggers at least one sensor 5 to sense the external ambient temperature. The results of the measurements carried out are transmitted to the processing unit 4, which determines the measured external ambient temperature T amb a first predefined temperature threshold S, which corresponds to a threshold for triggering monitoring; th1 Preferably, a step E02 of comparing the first temperature threshold value S th1 may be between 35°C and 50°C, for example around 40°C or 45°C.

[0037] The measured external ambient temperature T amb is the first threshold S th1 If the temperature is lower than the external ambient temperature T amb Conversely, the measured external ambient temperature T amb is the first threshold S th1If this is the case, i.e. if the external temperature reaches a heating value which is likely to affect the battery device 2, the management system 3 performs a monitoring phase 150, in particular a phase of monitoring the external ambient temperature, which includes all or some of the various steps described below.

[0038] In particular, the control module 7 detects the external ambient temperature T amb The monitoring phase 150 is started at a predetermined time interval I m_x At external ambient temperature T amb These measurements are carried out periodically by at least one temperature sensor 5 activated by a control module 7. The results of said measurements are then recorded on a memory unit 6.

[0039] Time Interval I m_x may be a fixed time interval. m_x is defined in particular such that the measurements are performed more frequently than in the detection step E02. m_x The time period I may be between 2 and 6 hours, for example about 4 hours. According to one non-limiting example implementation described in more detail below and seen in FIG. m_x may in particular be adapted to vary over time, for example over the course of a day or a week, depending on the external conditions of the vehicle 1. For example, the time intervals may vary depending on the time of day, depending on the light intensity detected by the at least one light intensity sensor 5, depending on the location of the vehicle 1 obtained via the localization means 10 and / or depending on weather conditions, for example detected by a connected device.

[0040] Once the measurements of the external ambient temperature have been acquired, the processing unit 4 calculates the external ambient temperature T amb The median or mean value of the measurement results T m_ambThen, a step E05 of calculating the median or mean value T m_amb is a second predefined temperature threshold S th2 and / or a second threshold S th2 A third predefined temperature threshold S th3 E06 is compared with the second threshold S th2 corresponds to a threshold for deactivating the monitoring phase, i.e. a threshold below which the external ambient temperature is unlikely to damage the battery device and therefore the monitoring phase may be interrupted. Such a threshold is the first threshold S th1 For example, such a threshold value may be between 30° C. and 40° C., in particular around 30° C. Conversely, the third threshold value S th3 The third threshold S corresponds to a temperature threshold at which a degradation of the service life of the battery device 2 is known to be observed. th3 is the first threshold S th1 It may be more than that.

[0041] Advantageously, the median or mean T m_amb The step E05 of calculating and the step E06 of comparing the previously calculated median or mean value T m_amb The most recent external ambient temperature measurement T amb The external ambient temperature T amb This is repeated after each new measurement of

[0042] Depending on the result of the comparison E06 performed by the processing unit 4, the management system 3 determines the maximum authorized charging level N of the battery device 2 as follows: c_max The steps E05 of programming the limits to the adapted levels E07 or the measuring step E04 and calculating the median or average value E05 and the comparison step E06 are repeated periodically at predefined time intervals until a result is obtained which triggers the step E07 of programming the limits.

[0043] Median or mean temperature T m_amb is the third threshold S th3 If this is the case, i.e. if a temperature is observed which is likely to cause accelerated aging of the battery device 2, then the step E07 of programming the limits consists of programming, via the control module 7, the maximum authorized charging level N c_max At an intermediate charge level N c_max_care In this way, at least one future charge of the battery device 2, which is performed immediately after the implementation of the management method 100 according to the invention, will be limited to such a limit, and charging will not be performed up to the maximum charge capacity of the battery device 2, but up to the defined intermediate charge level N c_max_care Such a principle is realized when, at the time when the method according to the invention is carried out and when the charging is carried out, the state of charge or SOC of the battery device is at an intermediate charge level N c_max_care It goes without saying that it is valid only if it is lower.

[0044] As a non-limiting example, such an intermediate charge level N c_max_care may be between 75% and 95% of the maximum charge capacity of the battery device 2. In particular, the intermediate charge level N c_max_care may be about 80% of the maximum charge capacity of the battery device 2.

[0045] Intermediate charge level N c_max_care may further be defined as a fixed, preprogrammed value, or alternatively may be variable. For example, the intermediate charge level value N c_max_care may be selected from a number of intermediate values ​​lower than the maximum charge capacity of the battery device depending on the calculated median or average temperature. Such a selection may be made based on a 2D map defined as a function of temperature. Alternatively, the intermediate charge level value N c_max_care is the value of the intermediate charge level N c_max_care and may be calculated based on a service life goal.

[0046] The median or mean temperature T obtained m_amb is the second threshold S th2 , i.e. when it is detected that the external ambient temperature is unlikely to affect the useful life of the battery device 2, a step E07 of programming the limit of the maximum authorized charge level of the device is performed by setting the maximum authorized charge level N c_max , the maximum charge level N c_max_full . In other words, there is therefore no limit on the charging capacity. Furthermore, the management system 3 commands an interruption E08 of the monitoring phase 150. The management system 3 can then start a new cycle of executing the method according to the invention and enter a standby phase in which the external ambient temperature is measured periodically, as described with reference to step E01, until it triggers a new monitoring phase 150.

[0047] Such a method can thus advantageously automatically trigger the preventive limiting of the maximum authorized charging level to a value adapted depending on the external ambient temperature. The method is further advantageously configured to prevent unexpected triggering resulting for example from possibly inaccurate peculiar temperature measurements due to the direct external environment of the vehicle 1.

[0048] According to one particular optional embodiment, the method according to the invention comprises the steps of: starting E03 of the monitoring phase 150 at a time t0; and then monitoring the time t0 that has elapsed since said starting. act and a step E090 of determining the determined elapsed time t act , the predefined minimum startup time threshold S act_min Then, as explained above, the step E07 of programming the adapted limits can include a step E091 of comparing the determined elapsed time t relative to the time t0. act is the minimum startup time threshold S act_minAccording to one non-limiting example, such a minimum threshold may be defined to ensure that at least three measurements of the external ambient temperature are taken. For example, a four hour interval I m_x In repeated measurements performed at , the minimum wake-up time threshold is c_max 10 hours, so that step E07 of programming the limit is carried out only after three measurements of the external ambient temperature have been taken. In particular, measurements may be taken when the elapsed time is 10 hours, 14 hours and 18 hours.

[0049] FIG. 3 further shows an alternative mode of execution of the management method 100 according to the invention, which comprises validating the external conditions detected via an external ambient temperature measurement via at least one other parameter also representative of said conditions.

[0050] According to a first exemplary implementation, the method comprises: ext In this sense, the management method 100 may include verifying the detected situation by analyzing the light intensity L ext and a step E10 of detecting the measured light intensity L ext , with respect to at least one predefined luminance threshold S L_ext and a step E11 of comparing.

[0051] Such a principle may be implemented, for example, by the external ambient temperature T _amb The aim is to ensure that the measurement of the ambient temperature is not biased. In particular, when the method according to the invention is carried out during a driving phase, wind impacts on the vehicle are likely to affect the measurement of the ambient temperature.

[0052] The execution of step E07 of programming the adapted limits therefore corresponds to the luminous intensity L ext In particular, the execution of step E07 may depend on the result of such a measurement of the measured light intensity level L extmay be implemented only when the light intensity threshold is equal to or greater than at least one predefined light intensity threshold. For example, such a threshold may be on the order of 50,000 lux or 100,000 lux, which corresponds to a level of solar illumination likely to cause heating of the battery device 2.

[0053] Alternatively, one or more luminosity thresholds S L_ext may be defined to distinguish or classify according to whether the measurements are performed during the day or at night and / or to evaluate, at least in part, the weather conditions, for example sunny or cloudy weather, and / or the direct environment of the vehicle 1, for example illuminated or shaded. The execution of step E07 of programming the adapted limits then includes the determination of the luminous intensity L ext The results of such a classification of measurements may be subject to change.

[0054] Mutatis mutandis, the same principle applies to the assessment of the temperature of the battery device 2. Thus, the method ext Alternatively or in addition to the step relating to the measurement of the temperature T batt The method may then include verifying the detected condition based on an evaluation of the temperature T batt and a step E12 of measuring the measured temperature T batt is a predefined threshold value S for detecting device overheating. T_batt and a step E13 of comparing the temperature T batt may be measured in one place, for example by at least a single sensor 9 included in a BMS computer of the battery device 2, or alternatively may be obtained by calculating the measured temperatures of the various cells and / or modules of the battery device 2, and thus the median or average of the temperatures obtained by multiple sensors.

[0055] Thus, as mentioned above, the execution of step E07 of programming the adapted limits can be dependent on the temperature of the battery device 2. For example, the maximum authorized charging level Nc_max The limit is set by the measured temperature T batt is a threshold value S for detecting heating of the battery device 2. T_batt Intermediate value N if and only if c_max_care By way of non-limiting example, the threshold for detecting heating of the battery device 2 may be between 40°C and 50°C, for example around 45°C.

[0056] Thus, as illustrated, the method may optionally include one or another of the checking steps. According to various alternatives, the luminous intensity L ext and / or the temperature T of the battery device 2 batt The measurement is performed at the external ambient temperature T batt Simultaneously with or after the repeated measurements E04, e.g. the median or mean external ambient temperature T m_batt or during the calculation of the median or mean T m_amb The second and third temperature thresholds S th2 , S th3 This may be performed following a comparison with

[0057] According to one alternative not shown, the above-mentioned checking step is carried out if the result of the comparison step E06 is greater than the maximum authorized charging level N c_max This step may be carried out only when it is likely to lead to the execution of step E07 of programming the limits of the

[0058] Furthermore, as briefly explained above, the light intensity measurements carried out may be optionally used to measure the time interval I during which measurements of the external ambient temperature are carried out, if necessary. m_x may be adjusted.

[0059] In fact, as explained above, at a predefined time interval I m_x is variable, and the predefined time intervals can be, for example and without limitation, the time of day, the light intensity L extThe method according to the invention then proceeds to a step E14 of measuring and / or detecting such parameters, and a time interval I m_x and a step E15 of adjusting the measurement value E14 depending on at least one parameter under consideration. In particular, said steps may be carried out simultaneously with the measurement of the external ambient temperature. Said steps may further be repeated in a manner similar to that described above with respect to the measurement of the external light intensity or the temperature of the battery device.

[0060] According to some specific example, the time interval I m_x depending on whether it is daytime or nighttime, e.g. the time of day and / or the measured luminosity L ext The time interval may be variable depending on the period of the year, with the time interval being smaller during the day than at night. The same is true for the period of the year, with the time interval I m_x is smaller in summer than in winter. Similarly, if weather conditions that are likely to cause heating of the battery system 2, even when stopped, are detected by a weather forecast provided by a connected device or by an on-board system in the vehicle, the time interval I m_x may be decreased and the measurement frequency increased accordingly. Furthermore, the measurement frequency may be increased when the vehicle 1 is located in a geographical area having climatic conditions likely to cause heating of the battery pack 2, detected for example by the localization means.

[0061] 2 and 3 further show in dotted lines an example of an optional mode of execution of the method according to the invention, c_max The programming of the limit E07 depends in particular on the consent of the user, so as not to affect their mobility. In this sense, the method is such that the charge level reaches the intermediate level N c_max_care, and before programming E07 of said limit, the method may comprise a step E16 of detecting a need for mobility programmed or provided by the user. The need for mobility may be determined on the basis of a destination provided by the user via the localization means 10 and / or via a connected device. The processing unit 4, or any other computer on board the vehicle 1, then estimates the range required to make the journey to the provided destination and determines the intermediate charge level N c_max_care By using the maximum charge level N, it is possible to define whether a desired journey is possible without the need to recharge the battery device 2. c_max_full If the programming of the limit to an intermediate level of charging planned for the next charge affects the mobility of the vehicle 1 in a different way than what could be observed using the management system 3, the management system 3 may inform the user via the human machine interface 12 that the programming of the limit to an intermediate level of charging planned for the next charge will affect their mobility. The system may inform the user of this, for example, at the time the vehicle is started or at the time charging is triggered. The execution of step E07 of the limit to an intermediate charge level may then be subject to the condition that said limit is accepted by the user of the vehicle 1.

[0062] The invention further relates to a method 200 for charging a battery pack 2, said method comprising in a first stage the steps of the management method 100 described above, said steps being carried out in anticipation of the charging of the vehicle 1. In other words, said steps are essentially carried out before or between two chargings. Once the limits have been programmed E07, the maximum authorized charging level N is programmed when the step E20 of charging the battery pack 2 is carried out. c_maxis limited to a previously defined maximum or intermediate level. The control module 7 ensures that charging can only be performed up to the adapted maximum charge level. It goes without saying that such a limitation may be implemented only on condition that the charge level of the battery device 2 at the time when the management method 100 is executed and before charging is lower than the intermediate maximum charge level.

[0063] Optionally, the charging method 200 may further comprise a step E21 of detecting charging of the vehicle 1. That the vehicle 1 is charging may be detected by the BMS computer and / or by the processing unit 4 and / or by detecting the connection of a charging port equipped on the vehicle 1 to a charging station. The monitoring phase 150 may then be interrupted as soon as charging E20 is started, i.e. as soon as charging is detected. A new cycle of executing the management method according to the invention may then be triggered.

[0064] According to an alternative embodiment not shown, the monitoring phase 150 is maintained following the charging step and the calculated median or average temperature T as explained above is monitored. m_amb is the second temperature threshold S th2 It will only be interrupted if the

[0065] 4 shows an example of a sequence of a charging method 200 according to the invention. For the entire duration of the timing diagram shown, the vehicle 1 is considered to be parked in a stationary state. After 200 hours, the control module 7 is awakened and then a temperature check measurement is performed. A first threshold value S th1 The control module 7 detects an external temperature greater than the predetermined time interval I m_s The median or average temperature T for the temperatures measured during the periodic wake-up events programmed in m_amb This triggers a phase 150 which monitors the external ambient temperature in order to calculate

[0066] After 370 hours, the monitoring phase 150 reaches a predefined activation time threshold S, set to, for example, 100 hours. act_min Larger time t act During this period, the device is activated and the external ambient temperature median or average T m_amb is the third temperature threshold S th3 The control module 7 activates a limit to an intermediate level of the maximum authorized charging level, here 80% of the maximum charging capacity, for the next charging of the battery device 2 in order to guarantee the service life of the battery device 2.

[0067] After 400 hours, the user recharges the battery device 2. The charging of the battery is automatically stopped at the intermediate maximum authorized level. The monitoring phase 150 is interrupted. After 660 hours, the control module 7 is awakened and the first threshold S th1 Following this detection E01, the electronic control module 7 determines the median or average value T of the measurements of the external ambient temperature based on the measurements made since the beginning of this new monitoring phase 150. m_amb Phase 150 is then initiated again to monitor the external temperature to calculate

[0068] After 780 hours, the monitored phase 150 reaches the predefined 100 hour activation time threshold S act_min The external ambient temperature T m_amb is the second temperature threshold S th2 If it is lower, the electronic control module programs a maximum charge limit to allow maximum charging of the battery pack during subsequent charging and determines whether the central or average external temperature T m_amb The phase 150 of monitoring is interrupted. A new monitoring phase is started when the first threshold S th1 It will only be triggered if an external temperature greater than

[0069] After 800 hours, the user charges the battery device 2 in the user's vehicle 1. The battery device 2 may be charged to its maximum capacity level since the detected external ambient temperature was not likely to damage the battery device 2 and the maximum authorized charge level did not need to be updated again.

[0070] The method and system according to the invention therefore advantageously allow a preventive management of the battery equipment, intended to charge it, depending on the external conditions of the vehicle, resulting in an optimization of its service life and thus of the utilization of the performance of the processing unit.

[0071] However, the invention is not intended to be limited to the means and forms described and illustrated herein, but extends to any equivalent means or forms, and to any technically-functional combinations of such means, provided that they ultimately accomplish the functions described and illustrated in this document.

Claims

1. A method (100) for managing an electric battery system (2) for an electric or hybrid motor vehicle (1), the method comprising: using at least one sensor (5) to estimate the charging of the battery system (2), the external ambient temperature (T ａｍｂ ) and detecting the measured external ambient temperature (T ａｍｂ ) relative to a first predefined temperature threshold (S ｔｈ１ ), and the method comprises a step (E02) of comparing the measured temperature with the first threshold value (S ｔｈ１ ) or more, via said at least one sensor (5), at predetermined time intervals (I ｍ＿ｘ ) at the external ambient temperature (T ａｍｂ a step (E03) of activating a phase (150) of monitoring the external ambient temperature in order to measure the temperature of the external ambient temperature and record the results of the measurements on a memory unit (6); the time t of activation of said monitoring phase (150); ０ The measurement result of the external ambient temperature (T ａｍｂ ) median or mean (T ｍ＿ａｍｂ ) (E05), and calculating the median or the mean value (T ｍ＿ａｍｂ ) relative to a second predefined temperature threshold (S ｔｈ２ ) and / or the second threshold (S ｔｈ２ ) greater than a third predefined temperature threshold (S ｔｈ３ ) and a step (E06) of comparing - the median or mean temperature (T ｍ＿ａｍｂ ) is the third threshold value (S ｔｈ３ ) or more, via a control module (7), ｃ＿ｍａｘ ) limit to an intermediate charge level (N) lower than the maximum charge capacity of the battery device (2). ｃ＿ｍａｘ＿ｃａｒｅ ) programming step (E07); - the median or mean temperature (T ｍ＿ａｍｂ ) is the second threshold value (S ｔｈ２ ) of the battery device (2), the following steps are performed when the maximum authorized charge level (N ｃ＿ｍａｘ ) limit to a maximum charge level (N) equal to the maximum charge capacity of the battery device (2). ｃ＿ｍａｘ＿ｆｕｌｌ ) and a step (E08) of interrupting said monitoring phase (150).

2. Following the initiation of the monitoring phase (150), the time (t ａｃｔ ) and determining the determined elapsed time (t ａｃｔ ) to a predefined minimum activation time threshold (S ａｃｔ＿ｍｉｎ ), and said step (E07) of programming the adapted limit comprises a step (E091) of comparing said elapsed time with said minimum activation time threshold (S ａｃｔ＿ｍｉｎ 10. The method of claim 1, wherein the method is performed only when the number of nodes in the network is greater than or equal to 100.

3. The luminous intensity (L ｅｘｔ ) and detecting the measured light intensity (L ｅｘｔ ) to a predefined brightness threshold (S Ｌ＿ｅｘｔ ), and said step (E07) of programming the adapted limit comprises comparing said measured luminous intensity level with a predefined brightness threshold (S Ｌ＿ｅｘｔ 3. The management method (100) of claim 1 or 2, wherein the method is performed only when the number of nodes is equal to or greater than 1.

4. The temperature (T ｂａｔｔ ) and measuring the measured temperature (T ｂａｔｔ ) and a predefined threshold (S Ｔ＿ｂａｔｔ ), and comparing said limit with an intermediate charge level (N ｃ＿ｍａｘ＿ｃａｒｅ ) of the battery device (2) is programmed to ｂａｔｔ ) is the threshold value (S) for detecting heating of the battery device (2). Ｔ＿ｂａｔｔ 3. The management method (100) of claim 1 or 2, wherein the method is performed only when the number of nodes is equal to or greater than 1.

5. The external ambient temperature (T ａｍｂ ) is performed depending on at least one parameter external to the vehicle (1), ｍ＿ｘ 3. The management method (100) of claim 1 or 2, further comprising the step of adjusting the

6. Before the step (E07) of programming the adapted limit, it includes a step (E16) of detecting the need for a mobility programmed or provided by a user, and setting the limit at an intermediate charge level (N ｃ＿ｍａｘ＿ｃａｒｅ 3. A method (100) according to claim 1 or 2, wherein the execution of said step (E07) of programming the limits into the vehicle (1) is subject to the condition that said limits are accepted by the user of said vehicle (1).

7. A method (200) for charging a battery device (2), comprising, in a first stage, all the steps of the management method (100) according to claim 1 or 2, followed by a step (E20) of charging the battery device (2), wherein during the step (E20) of charging, the maximum authorized charging level (N ｃ＿ｍａｘ ) is limited to the previously defined maximum charge level or the intermediate charge level.

8. Charging method (200) according to claim 7, comprising a step (E21) of detecting charging of the vehicle (1) and interrupting the monitoring phase (150) as soon as charging has been performed.

9. A system (3) for managing an electric battery device (2) including hardware and / or software elements that implement the management method (100) of claim 1 or 2, wherein the hardware elements include at least one external ambient temperature sensor (5), a processing unit (4) that can receive measurement results from the at least one sensor (5), a memory unit (6), and a control module (7) for controlling the battery device (2).

10. A hybrid or electric motor vehicle (1) comprising at least one electric battery device (2) and a management system (3) according to claim 9.

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