Portable rescue power bank

Abstract

A portable rescue mobile power supply (10) for an electric vehicle. The portable rescue mobile power supply (10) comprises an electric energy storage (20); a first bidirectional DC / DC converter (21) having a first side connected to the electric energy storage (20) and a second side connected to a high-voltage electrical connector (11), the high-voltage electrical connector being suitable for connecting to a corresponding high-voltage electrical connector (8) of the electric vehicle (1); a second bidirectional DC / DC converter (22) having a first side connected to the electric energy storage (20) and a second side connected to a low-voltage electrical connector (12), the low-voltage electrical connector being suitable for connecting to a corresponding low-voltage electrical connector (9) of the electric vehicle (1); and an electronic control unit (23) configured to control the operation of the first bidirectional DC / DC converter (21) and the second bidirectional DC / DC converter (22). The present disclosure also relates to an electric vehicle (1) suitable for connecting to the portable rescue mobile power supply (10), and a method of using the portable rescue mobile power supply (10).

Description

Technical Field

[0001] The present disclosure relates to a portable rescue mobile power source, a method of using a portable rescue mobile power source, and an electric vehicle including a high voltage battery.

[0002] Although the portable rescue mobile power source and related methods will be described in conjunction with an automobile, the present disclosure is not limited to this particular type of vehicle, but may alternatively be installed or implemented in other types of vehicles, such as trucks, buses, agricultural vehicles, work vehicles, forestry vehicles, marine vessels, motorcycles, rail vehicles, aircraft, etc. Background Art

[0003] In the field of electric vehicles, it can sometimes be difficult to easily assist and help a driver who has a vehicle breakdown. For example, from document DE 202017003208 U1 it is known to provide a power bank with a cable and a connector, which is suitable for charging an electric vehicle in the event of a dead battery. However, despite some activity in this field, there is still a need for further improved solutions for handling and resolving electric vehicle breakdowns, in particular in terms of flexibility and user-friendliness. Summary of the invention

[0004] The object of the present disclosure is to provide a portable rescue mobile power supply and related methods, in which the aforementioned problems are avoided. This object is achieved at least in part by the features according to the present invention. According to a first aspect of the present disclosure, a portable rescue mobile power supply for an electric vehicle is provided. The portable rescue mobile power supply comprises: an energy storage; a first bidirectional DC / DC converter, the first bidirectional DC / DC converter having a first side connected to the energy storage and a second side connected to a high-voltage electrical connector, the high-voltage electrical connector being suitable for connection to a corresponding high-voltage electrical connector of an electric vehicle; a second bidirectional DC / DC converter, the second bidirectional DC / DC converter having a first side connected to the energy storage and a second side connected to a low-voltage electrical connector, the low-voltage electrical connector being suitable for connection to a corresponding low-voltage electrical connector of an electric vehicle; and an electronic control unit, which is configured to control the operation of the first and second bidirectional DC / DC converters.

[0005] According to a second aspect of the present disclosure, a method for using a portable rescue mobile power supply is provided. The method includes the following steps: connecting a high-voltage electrical connector of the portable rescue mobile power supply to a corresponding high-voltage electrical connector of an electric vehicle, and connecting a low-voltage electrical connector of the portable rescue mobile power supply to a corresponding low-voltage electrical connector of the electric vehicle, wherein the high-voltage electrical connector and the low-voltage electrical connector are different from the main charging connector of the electric vehicle; obtaining information about the current operating state of a high-voltage battery or a high-voltage bus associated with the high-voltage battery, and information about the current operating state of a low-voltage battery or a low-voltage bus associated with the low-voltage battery; and taking into account the information obtained about the current operating state of the high-voltage battery or the high-voltage bus and / or the low-voltage battery or the low-voltage bus, controlling the operation of a first and / or second bidirectional DC / DC converter of the portable rescue mobile power supply for transferring electrical energy from an electrical energy storage of the portable rescue mobile power supply to any one of the high-voltage battery, the high-voltage bus, the low-voltage bus, the low-voltage battery, or the vehicle electric propulsion motor to provide a drivable electric vehicle and / or a vehicle range extension.

[0006] According to a third aspect of the present disclosure, an electric vehicle is provided, comprising: a high-voltage battery for vehicle propulsion and a main charging connector accessible from outside the vehicle and configured to charge the high-voltage battery; a low-voltage battery for powering vehicle safety functions; a high-voltage electrical connector connected to the high-voltage battery or a high-voltage bus associated with the high-voltage battery, wherein the high-voltage electrical connector is configured to be connected to a portable rescue mobile power source; and a low-voltage electrical connector connected to the low-voltage battery or a low-voltage bus associated with the low-voltage battery, wherein the low-voltage electrical connector is also configured to be connected to a portable rescue mobile power source.

[0007] In this way, providing assistance for handling and resolving electric vehicle faults is greatly simplified, as the portable rescue power bank is highly flexible in being compatible with various types of power train voltage levels and can handle various types of problems, such as high voltage battery drain, low voltage battery drain, vehicle DC / DC converter failure, blown fuse, open main contactor, all of which are mainly automatic and require no user interaction.

[0008] Further advantages are achieved by implementing one or several of the features according to the invention.

[0009] In some exemplary embodiments, the portable rescue mobile power supply further comprises a wireless transceiver module or a wired data communication connector connected to the electronic control unit, wherein the electronic control unit is configured to establish a data communication channel with the electric vehicle through the wireless transceiver module or the wired data communication connector. Thus, relevant information about the current operating state of the electric drive train of the vehicle can be obtained, so that appropriate countermeasures can be initiated through the portable rescue mobile power supply so that the vehicle can be driven again or the desired mileage extension can be completed.

[0010] In some exemplary embodiments, the electronic control unit is configured to obtain information about the current operating state of the high-voltage battery or high-voltage bus and / or the low-voltage battery or low-voltage bus of the electric vehicle, and control the operation of the first and / or second bidirectional DC / DC converters of the portable rescue mobile power supply in consideration of the information about the current operating state of the high-voltage battery or high-voltage bus and / or the low-voltage battery or low-voltage bus, so as to transfer electrical energy from the electrical energy storage of the portable rescue mobile power supply to any one of the high-voltage battery, high-voltage bus, low-voltage bus, low-voltage battery or vehicle electric propulsion motor of the electric vehicle to provide a drivable electric vehicle and / or vehicle range extension. By first obtaining relevant information about the electric powertrain and then applying appropriate control strategies of the first and second DC / DC converters, a more effective solution to the cause of the vehicle fault can be achieved, and the portable rescue mobile power supply can also adapt to the specifications of the electric powertrain of each specific vehicle brand and type, thereby improving compatibility.

[0011] In some exemplary embodiments, the electronic control unit is configured to: control the operation of the first bidirectional DC / DC converter to transfer electrical energy from the electrical energy storage of the portable rescue mobile power supply to any one of a high-voltage battery, a high-voltage bus, or a vehicle electric propulsion motor; and control the operation of the second bidirectional DC / DC converter to transfer electrical energy from the low-voltage battery to the electrical energy storage and / or the input side of the first bidirectional DC / DC converter; and / or control the operation of the second bidirectional DC / DC converter to transfer electrical energy from the electrical energy storage of the portable rescue mobile power supply to any one of a low-voltage bus or a low-voltage battery; and control the operation of the first bidirectional DC / DC converter to transfer electrical energy from the high-voltage battery to the electrical energy storage and / or the input side of the second bidirectional DC / DC converter.

[0012] In some exemplary embodiments, the electronic control unit is configured to transfer the electrical energy generated when the propulsion motor operates in the regenerative mode to the electrical energy storage of the portable rescue mobile power source via the first bidirectional DC / DC converter.

[0013] In some exemplary embodiments, the first bidirectional DC / DC converter is configured to provide a variable output voltage level on the second side, the variable output voltage level being specifically within the range of 48-1500 volts, more specifically within the range of 350-1200 volts. Thus, the portable rescue mobile power source can adapt to a wide range of different electric drive train specifications, thereby improving compatibility.

[0014] In some exemplary embodiments, the second bidirectional DC / DC converter is further configured to provide a variable output voltage level on the second side, the variable output voltage level being specifically within the range of 10-59 volts, more specifically within the range of 12-32 volts, and even more specifically within the range of 12-16 volts. Therefore, the portable rescue mobile power source can adapt to a wide range of different electric drive train specifications, thereby improving compatibility.

[0015] In some exemplary embodiments, the high voltage electrical connector and the low voltage electrical connector are separate, individual electrical connectors.

[0016] In some exemplary embodiments, the high voltage electrical connector and the low voltage electrical connector are integrated into a single electrical connector. Therefore, the connection of the portable rescue mobile power source to the vehicle can be simplified.

[0017] In some exemplary embodiments, the power storage of the portable rescue mobile power source has a voltage level within the range of 12-59 volts, specifically within the range of 12-48 volts, and more specifically within the range of 12-24 volts. Therefore, the portable rescue mobile power source can adapt to a wide range of different electric drive train specifications, thereby improving compatibility.

[0018] In some exemplary embodiments, the portable rescue mobile power source further comprises a housing for housing and protecting components of the portable rescue mobile power source from external influences, wherein the housing has a carrying handle for enabling a user to simplify transport handling.

[0019] In some exemplary embodiments, the high voltage electrical connector and the low voltage electrical connector of the vehicle are both located in the trunk of the vehicle. Therefore, the portable rescue mobile power supply can be easily installed and connected to the vehicle, and the trunk generally also provides safe storage of the portable rescue power supply during vehicle travel, such as by suitable cargo straps.

[0020] In some exemplary embodiments, the vehicle also includes a DC / DC converter connecting the high-voltage bus to the low-voltage bus, a power converter connected to the high-voltage bus and to an electric propulsion motor connected to the vehicle's powertrain, a main electrical contactor located in the high-voltage bus between the high-voltage battery and the power converter, wherein a high-voltage electrical connector is connected to the high-voltage bus between the main electrical contactor and the power converter.

[0021] In some exemplary embodiments, the method steps of controlling the operation of the first and / or second bidirectional DC / DC converters to provide a drivable electric vehicle and / or vehicle range extension, taking into account the information obtained about the current operating state of the high-voltage battery or high-voltage bus and / or the low-voltage battery or low-voltage bus, involve: when the information obtained about the operating state of the high-voltage battery or high-voltage bus indicates that there is not enough voltage level to drive the electric vehicle or the state of charge of the high-voltage battery is below a threshold, controlling the operation of the first bidirectional DC / DC converter to provide a sufficient output voltage level to drive the electric vehicle, and / or when the information obtained about the operating state of the low-voltage battery or low-voltage bus indicates that there is not enough voltage level to operate the vehicle safety function, controlling the operation of the second bidirectional DC / DC converter to provide a sufficient output voltage level to operate the vehicle safety function. In other words, the control of the first and / or second bidirectional DC / DC converters takes into account the specific situation, thereby providing a flexible and adaptive method.

[0022] In some exemplary embodiments, the method step of controlling the operation of the first bidirectional DC / DC converter to transfer electrical energy from the power storage of the portable rescue mobile power supply to any one of the high-voltage battery, the high-voltage bus or the vehicle electric propulsion motor additionally includes: controlling the operation of the second bidirectional DC / DC converter to transfer electrical energy from the low-voltage battery to the power storage and / or the input side of the first bidirectional DC / DC converter; and / or wherein the step of controlling the operation of the second bidirectional DC / DC converter to transfer electrical energy from the power storage of the portable rescue mobile power supply to any one of the low-voltage bus or the low-voltage battery additionally includes: controlling the operation of the first bidirectional DC / DC converter to transfer electrical energy from the high-voltage battery to the power storage and / or the input side of the second bidirectional DC / DC converter. In other words, the electrical energy available in one of the high-voltage and low-voltage batteries of the vehicle can be transferred to the other of the high-voltage and low-voltage batteries through the portable rescue mobile power supply together with the electrical energy from the power storage. Therefore, the total power supply capacity of the portable rescue mobile power supply is improved.

[0023] In some exemplary embodiments, the method may include the step of transferring the electrical energy generated by the propulsion motor when operating in the regeneration mode to the electrical energy storage of the portable rescue mobile power source via the first bidirectional DC / DC converter. This may be advantageous when the regenerated energy cannot be used for charging the high voltage battery for any reason, such as due to a malfunction, overheating, full charge, etc.

[0024] The present disclosure also relates to a method of connecting a portable rescue mobile power source to an electric vehicle, wherein the electric vehicle includes a high-voltage battery for vehicle propulsion, a main charging connector accessible from outside the vehicle and configured to charge the high-voltage battery, a low-voltage battery for powering vehicle safety functions, a high-voltage electrical connector connected to the high-voltage battery or a high-voltage busbar associated with the high-voltage battery, and a low-voltage electrical connector connected to the low-voltage battery or a low-voltage busbar associated with the low-voltage battery. The method includes connecting the high-voltage electrical connector of the portable rescue mobile power source to the high-voltage electrical connector of the electric vehicle, and connecting the low-voltage electrical connector of the portable rescue mobile power source to the low-voltage electrical connector of the electric vehicle, wherein the high-voltage electrical connector and the low-voltage electrical connector of the portable rescue mobile power source are separate electrical connectors or integrated in a single electrical connector.

[0025] Other features and advantages of the present invention will become apparent when studying the following description.A person skilled in the art realizes that different features of the present disclosure can be combined to create embodiments other than those explicitly described above and below, without departing from the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present disclosure will be described in detail below with reference to the accompanying drawings, wherein

[0027] Figure 1 schematically illustrates a side view of a vehicle configured to receive a portable rescue power bank,

[0028] Figure 2 schematically illustrates a 3D view of an exemplary embodiment of a portable rescue power bank,

[0029] Figure 3 Schematically illustrates an exemplary embodiment of a circuit layout of a portable rescue power bank,

[0030] Figure 4 Schematically illustrates an exemplary embodiment of a circuit layout of a vehicle powertrain having a portable rescue power bank connected thereto,

[0031] Figure 5 schematically illustrates an alternative exemplary embodiment of a circuit layout for a portable rescue power bank, and

[0032] Figure 6 The basic steps of the method of using a portable rescue power bank according to the present disclosure are schematically shown. DETAILED DESCRIPTION

[0033] Various aspects of the present disclosure will be described below in conjunction with the accompanying drawings to illustrate rather than limit the present disclosure, wherein like numbers represent like elements, and changes in the described aspects are not limited to the specifically shown embodiments, but are applicable to other changes in the present disclosure.

[0034] Figure 1 A side view of an exemplary embodiment of an electric vehicle 1 is schematically shown, having front wheels 2a, rear wheels 2b, as well as a passenger compartment 3, a luggage compartment 4 and an electric propulsion motor 19 (eg a single-phase or multi-phase AC motor or DC motor).

[0035] The electric vehicle 1 also includes a high-voltage battery 5 for vehicle propulsion and a main charging connector 6 that is accessible from outside the vehicle 1 and is configured to charge the high-voltage battery 5, a low-voltage battery 7 for powering vehicle safety functions, a high-voltage electrical connector 8 connected to the high-voltage battery 5 or a high-voltage bus associated with the high-voltage battery 5, wherein the high-voltage electrical connector 8 is configured to be connected to a portable rescue mobile power supply 10, and a low-voltage electrical connector 9 is connected to the low-voltage battery 7 or a low-voltage bus associated with the low-voltage battery 7, wherein the low-voltage electrical connector 9 is also configured to be connected to the portable rescue mobile power supply 10.

[0036] exist Figure 1 In the figure, the portable rescue mobile power source 10 with the related high-voltage electrical connector 11 and low-voltage electrical connector 12 is located in the luggage compartment 4, but is in a disconnected state. Obviously, the positions of the high-voltage electrical connector 8 and the low-voltage electrical connector 9 in the vehicle are not limited to the luggage compartment 4, but can be changed according to specific circumstances, so that the portable rescue mobile power source 10 can be conveniently connected during the driving of the vehicle and provide storage space for it.

[0037] In other words, in some exemplary embodiments, the high voltage electrical connector 8 and the low voltage electrical connector 9 are available in the luggage compartment of the vehicle. However, depending on the size of the portable rescue mobile power supply 10, the high voltage electrical connector 8 and the low voltage electrical connector 9 may be located, for example, under the seat of the vehicle, or in another storage area of ​​the vehicle 1, where the portable rescue mobile power supply 10 can be safely stored during driving of the vehicle 1.

[0038] Through the high-voltage electrical connector 8 and the low-voltage electrical connector 9 of the vehicle 1, the portable rescue mobile power supply 10 can be easily installed and electrically connected to the vehicle to provide various types of assistance, such as providing electrical energy for vehicle propulsion, or charging the high-voltage battery 5 and / or the low-voltage battery 7 of the vehicle 1.

[0039] The high voltage battery 5 may be a lithium-ion battery, a lithium-sulfur battery, or a solid-state battery. For example, the rated voltage level of the high voltage battery 5 may be between 100 V and 1500 V. The battery capacity in kilowatt-hours depends on various factors, such as whether the vehicle is a hybrid vehicle with an additional power source (such as an internal combustion engine), or whether the vehicle is a pure electric vehicle, and the desired operating range. For example, the capacity may be about 10-150 kWh.

[0040] However, in certain applications of so-called “mild hybrid” systems, the high voltage battery 5 may only be in the range of, for example, 24V-59V, in particular 24V or 48V.

[0041] The rated voltage level of the low voltage battery 7 used to power the vehicle safety functions is always lower than that of the high voltage battery 5. The rated voltage of the low voltage battery 7 may be in the range of 6V-24V, specifically 12V.

[0042] The term "vehicle safety function" here refers to certain vehicle functions related to the ability to achieve safe operation of the vehicle during driving, such as vehicle steering and vehicle braking, but may also include vehicle external lighting, vehicle data communication with, for example, emergency centers and / or fleet managers, and sensor devices for achieving autonomous driving (such as cameras, radars, lidars, etc.).

[0043] For example, the main charging connector 6 accessible from outside the vehicle 1 may be of any standardized type, ie compliant with a standard such as, for example, IEC 62196, EN 62196 or SAE J1772.

[0044] The high voltage electrical connector 8 may be a separate connector or may be integrated into a combined connector including the low voltage electrical connector 9. Each of the high voltage electrical connector 8 and the low voltage electrical connector 9 includes at least two poles, ie at least a DC positive and negative pole.

[0045] Figure 2 A three-dimensional view of an exemplary embodiment of a portable rescue mobile power supply for an electric vehicle is shown in FIG. The portable rescue mobile power supply 10 may have a housing 15 of a box or any shape, and an external high-voltage electrical connector 11 and a low-voltage electrical connector 12, which are used to conveniently and quickly electrically connect with the corresponding high-voltage electrical connector 8 and low-voltage electrical connector 9 of the vehicle 1. The portable rescue mobile power supply 10 may also have a data communication connector 13 for establishing a data communication channel with the electric vehicle, and the vehicle 1 must also have a corresponding data communication connector. Alternatively, the portable rescue mobile power supply 10 may include a transceiver for establishing a wireless data communication channel with the electric vehicle 1.

[0046] As mentioned above, the external high voltage electrical connector 11 and the low voltage electrical connector 12 may be separate components, such as Figure 2 As shown, they can also be combined into a single combined connector, which can also include a data communication connector 13.

[0047] The portable rescue power bank 10 may be equipped with a carrying handle 14 to simplify manual transportation and carrying of the portable rescue power bank 10 .

[0048] An example scenario for using the portable rescue power bank 10 may occur when an electric vehicle breaks down and stops running and the driver or vehicle alerts that help is needed. At this point, nearby roadside assistance may send a rescue vehicle to the broken-down vehicle, and upon arrival, the user may simply remove the charged portable rescue power bank 10 from the rescue vehicle and install it on the broken-down vehicle, such as Figure 1 As shown, the high voltage electrical connector 11 and the low voltage electrical connector 12 of the portable rescue mobile power supply 10 are connected to the high voltage electrical connector 8 and the low voltage electrical connector 9 of the faulty vehicle 1 .

[0049] Thereafter, the portable rescue mobile power supply 10 can evaluate the electric vehicle's electrical powertrain and then provide a suitable output voltage at each of the high voltage electrical connector 11 and the low voltage electrical connector 12 of the portable rescue mobile power supply 10, thereby making the vehicle 1 drivable again in many cases.

[0050] Figure 3 An exemplary embodiment of a circuit layout of a portable rescue mobile power supply 10 is schematically shown. The portable rescue mobile power supply comprises: an energy storage 20; a first bidirectional DC / DC converter 21 having a first side connected to the energy storage 20 and a second side connected to a high-voltage electrical connector 11, which is suitable for connecting to a corresponding high-voltage electrical connector 8 of an electric vehicle; and a second bidirectional DC / DC converter 22 having a first side connected to the energy storage 20 and a second side connected to a low-voltage electrical connector 12, which is suitable for connecting to a corresponding low-voltage electrical connector 9 of an electric vehicle 1. The portable rescue mobile power supply also comprises an electronic control unit 23, which is configured to control the operation of the first bidirectional DC / DC converter 21 and the second bidirectional DC / DC converter 22 and to communicate data with the electric vehicle.

[0051] exist Figure 3 In the exemplary embodiment, the portable rescue mobile power supply 10 includes a dedicated wired data communication connector 13 for establishing the data communication with the electric vehicle, but the portable rescue mobile power supply 10 may alternatively include a wireless transceiver module connected to the electronic control unit 23 and configured to implement data communication with the electric vehicle.

[0052] The energy storage device 20 of the portable rescue mobile power source 10 is usually a battery, such as a lithium-ion battery, a lithium-sulfur battery, or a solid-state battery. Alternatively, the energy storage device 20 may be, for example, a hybrid battery / capacitor energy storage device. The rated voltage level and energy capacity (kWh) of the energy storage device 20 may be selected according to the specific situation and the intended use, while avoiding the energy storage device 20 being too heavy and bulky. For example, the weight of the energy storage device 20 may be in the range of 5-20 kg.

[0053] In addition, in order to make the portable rescue mobile power supply 10 portable, the overall weight of the portable rescue mobile power supply 10 can be set within a range of about 5-50 kg, specifically within a range of about 5-35 kg. The term "portable" herein means that it can be carried by a normal male or female adult user within a distance of at least about 3 meters, such as by carrying the handle 14.

[0054] The selection of the rated output voltage level of the electrical energy storage 20 preferably takes into account the desired voltage output levels of the high voltage electrical connector 11 and the low voltage electrical connector 12, because this relationship strongly affects the required performance of the first bidirectional DC / DC converter 21 and the second bidirectional DC / DC converter 22. For example, if the portable rescue mobile power supply 10 is configured to provide 12V at the low voltage electrical connector 12 and about 400V at the high voltage electrical connector 11, for example, the electrical energy storage 20 with a rated voltage level of about 100V can be provided, so that efficient DC / DC conversion to 400V and 12V can be achieved by the first bidirectional DC / DC converter 21 and the second bidirectional DC / DC converter 22, respectively.

[0055] The first bidirectional DC / DC converter 21 and the second bidirectional DC / DC converter 22 are, for example, switch-isolated or non-isolated converters. Therefore, the electronic control unit 23 of the portable rescue power bank 10 can control the output voltage levels of the high-voltage electrical connector 11 and the low-voltage electrical connector 12.

[0056] Furthermore, due to the bidirectional characteristics of the first DC / DC converter 21 and the second DC / DC converter 22, for example, the electric energy of the high-voltage battery of the electric vehicle 1 can be used to charge the low-voltage battery of the vehicle through the portable rescue mobile power supply 10, or for example, the electric energy of the low-voltage battery of the electric vehicle 1 can be used to charge the high-voltage battery of the vehicle, or used to power the electric propulsion motor 19 of the vehicle through the portable rescue mobile power supply 10. In other words, the bidirectional characteristics of the first DC / DC converter 21 and the second DC / DC converter 22 enable the portable rescue mobile power supply 10 to act as a bypass to transfer electric energy between the high-voltage side and the low-voltage side of the vehicle. Furthermore, when the vehicle is operating in a regenerative mode, i.e., when the back electromotive force provided by the propulsion motor 19 is used to charge the electric energy storage 20 of the portable rescue mobile power supply 10, the electric energy generated by the propulsion motor 19 can also be delivered to the electric energy storage 20 of the portable rescue mobile power supply 10.

[0057] Figure 4 An exemplary embodiment of the layout of an electric train 25 of an electric vehicle 1 having a portable rescue mobile power source 10 connected thereto is schematically shown. According to this exemplary embodiment, the electric train 25 comprises a high voltage battery 5 connected to an electric propulsion motor 19 via a main contactor 26 and an electric converter 27. The DC link connecting the main contactor 26 and the electric converter 27 is referred to herein as a high voltage bus 28.

[0058] The main contactor 26 is closed during normal operation of the electric vehicle 1 . The function of the main contactor is to open in the event of a potential short circuit, thereby disconnecting the high-voltage battery 5 from the high-voltage bus 28 to ensure the safety of the vehicle and passengers.

[0059] The electric converter 27 converts the direct current provided by the high voltage battery 5 into an appropriate voltage level and / or frequency, and then provides it to the electric propulsion motor 19. For example, the electric converter 27 may be an electric inverter.

[0060] The output shaft of the electric propulsion motor 19 is drivingly connected to a transmission shaft, which is drivingly connected to drive wheels, such as the front wheels 2a and / or the rear wheels 2b.

[0061] exist Figure 4 In the exemplary embodiment of the invention, the electric drive train 25 further includes a low voltage battery 7, which is connected to the high voltage battery 7 via a DC / DC converter 29, or more specifically, is connected to the high voltage bus 28 via a DC / DC converter 29. Therefore, if necessary, the electric energy from the high voltage battery 5 can be used to charge the low voltage battery 7, or vice versa. The DC link connecting the low voltage battery 7 and the DC / DC converter 29 is referred to herein as a low voltage bus 34.

[0062] In some exemplary embodiments, the vehicle powertrain does not include other propulsion motors, such as an internal combustion engine, and the vehicle powertrain relies on electricity from a relatively large capacity high-voltage battery to achieve vehicle propulsion. In other exemplary embodiments (such as mild hybrid powertrains, etc.), the vehicle powertrain has an additional propulsion motor, such as an internal combustion engine, in which case the vehicle powertrain is less dependent on electricity and the capacity of the high-voltage battery can be smaller.

[0063] In any case, the low-voltage battery 7 is configured to supply power to at least one load 30 related to a vehicle safety function (e.g., an electric steering actuator, or an electrically actuated friction brake, or an electric motor that powers a hydraulic pump of a hydraulic steering system and / or a hydraulic brake system). The load 30 related to a vehicle safety function may be connected to a low-voltage bus 34.

[0064] The powertrain further comprises a main charging connector 6, which is accessible from the outside of the vehicle 1 and is arranged to be connected to a charging connector 32 of a fixed charging station 31. The main charging connector 6 is connected to the high voltage busbar via an electrical converter 31, so that the high voltage battery 5 and / or the low voltage battery 7 can be charged, for example, during parking of the vehicle. Depending on the type of charging station 31, the electrical converter 31 may be a DC / DC converter and / or an AC / DC converter.

[0065] In some exemplary embodiments, the electric powertrain may include an electronic control unit 33 configured to communicate data with the portable rescue mobile power source 10. The powertrain electronic control unit 33 may obtain up-to-date information about, for example, the current voltage levels of the high voltage bus 28, the high voltage battery 5, the low voltage bus 34, and / or the low voltage battery 7, for example, via suitable sensors or via calculations based on detected relevant parameters (e.g., current levels).

[0066] The electronic control unit 23 of the portable rescue mobile power supply 10 can be configured to first establish a data communication channel between the electronic control unit 23 of the portable rescue mobile power supply 10 and the electric vehicle 1, especially the electronic control unit 33 of the electric transmission system, and obtain information about the current operating status of the high-voltage battery 5 or the high-voltage bus 28 and / or the low-voltage battery 7 or the low-voltage bus 34 of the electric vehicle 1 through the data communication channel.

[0067] According to an alternative exemplary embodiment, the portable rescue mobile power source 10 may lack a dedicated data communication connector 13 or a wireless transceiver module for establishing a data communication channel with the electric vehicle 1, such as Figure 5In this case, the electronic control unit 23 of the portable rescue mobile power supply 10 can be simply configured to obtain information about the current operating state by detecting the available voltage levels at the high voltage connector 8 and the low voltage connector 9 of the vehicle 1, thereby eliminating the need to establish a communication channel between the portable rescue mobile power supply 10 and the vehicle.

[0068] Reference Figures 1 to 5 In all exemplary embodiments of the portable rescue mobile power supply 10, the electronic control unit 23 of the portable rescue mobile power supply 10 can be configured to automatically control the operation of the first and / or second bidirectional DC / DC converters 21, 22 of the portable rescue mobile power supply 10, taking into account the information obtained about the current operating status of the high-voltage battery 5 or the high-voltage bus 28 and / or the low-voltage battery 7 or the low-voltage bus 34, so that an appropriate level of power is delivered from the energy storage 20 of the portable rescue mobile power supply 10 to any one of the high-voltage battery 5, the high-voltage bus 28, the low-voltage bus 34, the low-voltage battery 7 or the vehicle electric propulsion motor 19 of the electric vehicle to provide a drivable electric vehicle and / or extend the vehicle's driving range.

[0069] In other words, in the event of a vehicle breakdown, the vehicle rescue personnel can, after arriving at the vehicle breakdown location, first simply bring the charged portable rescue mobile power supply 10 to the stalled vehicle and connect them via the high-voltage and low-voltage connectors 11, 12, such as Figure 4 Thereafter, the portable rescue power bank 10 may collect relevant information about the stalled vehicle to determine the fault problem and apply a solution to at least temporarily provide a drivable vehicle.

[0070] Based on the relevant information collected about the stalled vehicle, the steps of identifying the problem that caused the failure and finding an appropriate resolution strategy to at least temporarily provide a drivable vehicle may involve some system analysis and problem identification process.

[0071] The system analysis and problem identification process may be performed by the electronic control unit 23 of the portable rescue mobile power supply 10 by executing software stored in a data memory of the portable rescue mobile power supply 10. Alternatively, the portable rescue mobile power supply 10 may wirelessly forward the relevant data to a remote server, which performs the analysis and subsequently provides an appropriate solution to the problem. As described above, the solution includes control of the first and / or second bidirectional DC / DC converters 21, 22 to achieve an appropriate level of power delivered from / to the power storage 20 of the portable rescue mobile power supply 10 via the first and / or second bidirectional DC / DC converters 21, 22. The system analysis and problem identification process may then be repeatedly re-evaluated in a subsequent process of problem solving.

[0072] According to some exemplary embodiments, the system analysis and problem identification process of the electric powertrain performed by the portable rescue mobile power supply 10 involves detecting the available voltage levels at the first electrical connector 8 and the second electrical connector 9 (i.e., the high voltage bus 28 and / or the high voltage battery 5, and the low voltage bus 34 or the low voltage battery 7), and then comparing the first voltage and the second voltage with relevant thresholds to determine the health and integrity of the electric powertrain 25. For example, the relevant thresholds can be obtained from the vehicle itself through the communication between the electronic control unit 23 of the portable rescue mobile power supply 10 and the electronic control unit 33 of the powertrain. Alternatively, the relevant thresholds can also be obtained from a remote server.

[0073] For example, if the system analyzes that the charge level of the high-voltage battery 5 is too low or faulty, or the high-voltage fuse is blown, or the main contactor 26 is set to an open state and cannot be closed, the electric energy stored in the electric energy storage device 20 of the portable rescue mobile power supply 10 can be used to temporarily drive the electric propulsion motor 19, thereby providing a driving range sufficient to reach the charging station 31. In such a process, the electric energy of the low-voltage battery 7 can also be used in combination with the portable rescue mobile power supply 10 to further increase the driving range.

[0074] Alternatively, if the system analysis concludes that the charge level of the low-voltage battery 7 is too low so that the load 30 associated with the vehicle safety function cannot be operated as desired, the electrical energy stored in the electrical energy storage 20 of the portable rescue mobile power source 10 can be used to temporarily operate the load 30 associated with the vehicle safety function so that the vehicle can be driven again. This situation may be particularly relevant when, for example, a DC / DC converter 29 connecting the high-voltage battery 5 and the low-voltage battery 7 of the powertrain fails, because this will effectively prevent the high-voltage battery 5 from temporarily operating the load 30 associated with the vehicle safety function via the DC / DC converter 29.

[0075] The portable rescue power bank 10 can be used as a temporary or permanent range extender for an electric vehicle alternatively or in combination with any of the above scenarios. For example, if a user plans to take a longer trip, the user can install one, two or more fully charged portable rescue power banks 10 in the vehicle before departure to achieve convenient range extension, thereby avoiding the need for intermediate charging stops along the driving route.

[0076] Another example may be when the available maximum driving range of the vehicle 1 is insufficient to enable a commute to work, etc. This situation may occur frequently due to the generally smaller battery capacity of hybrid vehicles. In such a case, the user may decide to permanently install the portable rescue power bank 10 to provide the range extension required for a frictionless commute to work, etc.

[0077] Due to the flexibility of the portable rescue mobile power source 10 in terms of vehicle powertrain compatibility (i.e., in terms of the variable voltage levels that can be provided at the high voltage connector 11 and the low voltage connector 12 of the portable rescue mobile power source 10), almost any driver, regardless of vehicle brand or type, can use the same type of portable rescue mobile power source 10, as long as the vehicle includes a compatible high voltage connector 8 and a low voltage connector 9. In other words, the charged portable rescue mobile power source 10 can be rented or purchased by users at various locations such as highways and city vehicle service centers.

[0078] Refer to the following Figures 1 to 5 Other example details of the portable rescue mobile power supply 10 are described. As described above, the first bidirectional DC / DC converter 21 can be configured to provide a variable output voltage level on the second side of the converter 21. Specifically, the variable output voltage level on the second side of the converter 21 can vary within the range of 48-1500 volts, and more specifically within the range of 350-1200 volts. Note that these values ​​only define the maximum limit values, and are not necessarily the boundaries of the voltage range that can actually be provided on the second side of the converter 21, which is typically significantly narrower. In other words, in some embodiments, the first DC / DC converter can have an actual variable output voltage in the range of 200-400 volts.

[0079] Likewise, the second bidirectional DC / DC converter 22 is also configured to provide a variable output voltage level on the second side. However, the second bidirectional DC / DC converter 22 is configured to provide a variable output voltage level within the range of 10-59 volts, more specifically within the range of 12-32 volts, and even more specifically within the range of 12-16 volts.

[0080] The first bidirectional DC / DC converter 21 and the second bidirectional DC / DC converter 22 may actually have any known topology and may be selected according to the specific situation and the required working conditions. For example, one or both of the first bidirectional DC / DC converter 21 and the second bidirectional DC / DC converter 22 may be a non-isolated bidirectional DC / DC converter, such as, for example, a bidirectional buck-boost DC / DC converter, a cascaded bidirectional buck-boost DC / DC converter, a bidirectional CUK DC / DC converter, a switched capacitor bidirectional DC / DC converter, etc. Alternatively, one or both of the first bidirectional DC / DC converter 21 and the second bidirectional DC / DC converter 22 may be an isolated bidirectional converter, i.e., a converter having electrical isolation between the input side and the output side. Some examples of isolated bidirectional DC / DC converters are a dual half-bridge isolated bidirectional DC / DC converter and a dual active full-bridge isolated bidirectional DC / DC converter.

[0081] The power storage of the portable rescue mobile power supply has a voltage level in the range of 12-59 volts, specifically in the range of 12-48 volts, and more specifically in the range of 12-24 volts. Therefore, according to the setting of the DC / DC converter, the portable rescue mobile power supply 10 can meet the 60 volt limit defined by the safety extra low voltage (SELV) standard.

[0082] According to some exemplary embodiments, the portable rescue mobile power supply 10 includes a housing 15 for housing and protecting components of the portable rescue mobile power supply from external influences, wherein the housing 15 has a carrying handle 14 for enabling a user to simplify the transport handling of the portable rescue mobile power supply 10 .

[0083] The present disclosure also relates to a method of using the portable rescue mobile power supply 10, which will be referred to below. Figure 6 The method comprises a first step S10, i.e., connecting a high voltage electrical connector 11 of a portable rescue mobile power source 10 to a corresponding high voltage electrical connector 8 of an electric vehicle 1, and connecting a low voltage electrical connector 12 of the portable rescue mobile power source 10 to a corresponding low voltage electrical connector 9 of the electric vehicle 1, wherein the high voltage electrical connector 8 and the low voltage electrical connector 9 of the vehicle 1 are different from the main charging connector 6 of the electric vehicle. In other words, the vehicle comprises a high voltage electrical connector 8, a low voltage electrical connector 9 and a main charging connector 6.

[0084] The method further comprises a second step S20, i.e. obtaining information about the current operating state of the high voltage battery 5 or the high voltage bus 28 associated with the high voltage battery 5, and information about the current operating state of the low voltage battery 7 or the low voltage bus 34 associated with the low voltage battery 7. The information can be obtained, for example, by establishing a communication channel between the electronic control unit 23 of the portable rescue mobile power supply 10 and the electric vehicle 1, and then collecting relevant information from the vehicle. Alternatively, the electronic control unit 23 of the portable rescue mobile power supply 10 can be configured to obtain information about the current operating state by detecting the available voltage levels at the high voltage connector 8 and the low voltage connector 9 of the vehicle 1.

[0085] In addition, the method includes a third step S30, namely, controlling the operation of the first bidirectional DC / DC converter 21 and / or the second bidirectional DC / DC converter 21 of the portable rescue mobile power supply 10, taking into account the information obtained about the current operating status of the high-voltage battery 5 or the high-voltage bus 28 and / or the low-voltage battery 7 or the low-voltage bus 34, so as to transmit electrical energy from the energy storage 20 of the portable rescue power box 10 to any one of the high-voltage battery 5, the high-voltage bus 28, the low-voltage bus 34, the low-voltage battery 7 or the vehicle electric propulsion motor 19 to provide a drivable electric vehicle 1 and / or extend the vehicle's driving range.

[0086] In some exemplary embodiments, the third step S30 of controlling the operation of the first bidirectional DC / DC converter and / or the second bidirectional DC / DC converter to provide a drivable electric vehicle and / or vehicle range extension, taking into account the information obtained about the current operating status of the high-voltage battery or the high-voltage bus and / or the low-voltage battery or the low-voltage bus, may involve: when the information obtained about the operating status of the high-voltage battery or the high-voltage bus indicates that the voltage level is insufficient to drive the electric vehicle or the charging state of the high-voltage battery is below a threshold, controlling the operation of the first bidirectional DC / DC converter to provide an output voltage level sufficient to drive the electric vehicle.

[0087] In some exemplary embodiments, the third step S30 of controlling the operation of the first bidirectional DC / DC converter and / or the second bidirectional DC / DC converter to provide a drivable electric vehicle and / or vehicle range extension may involve controlling the operation of the second bidirectional DC / DC converter to provide an output voltage level sufficient to operate the vehicle safety function when the information obtained about the operating status of the low voltage battery or the low voltage bus indicates that the voltage level is insufficient to operate the vehicle safety function, taking into account the information obtained about the current operating status of the high voltage battery or the high voltage bus and / or the low voltage battery or the low voltage bus.

[0088] According to some exemplary embodiments, the third step S30 of controlling the operation of the first bidirectional DC / DC converter 21 to transfer electric energy from the electric energy storage 20 of the portable rescue mobile power source 10 to any one of the high-voltage battery 5, the high-voltage bus 28, or the vehicle electric propulsion motor 19 may additionally include controlling the operation of the second bidirectional DC / DC converter 22 to transfer electric energy from the low-voltage battery 7 to the electric energy storage 20 and / or the input side of the first bidirectional DC / DC converter 21. Therefore, the electric energy of the low-voltage battery 7 can also be used to improve the supply to the high-voltage bus 28, thereby reducing the load on the electric energy storage 20.

[0089] Similarly, the third step S30, which may additionally include controlling the operation of the second bidirectional DC / DC converter to transfer electric energy from the electric energy storage of the portable rescue mobile power source to either the low-voltage bus or the low-voltage battery, additionally includes controlling the operation of the first bidirectional DC / DC converter to transfer electric energy from the high-voltage battery to the input side of the electric energy storage and / or the second bidirectional DC / DC converter. Therefore, the electric energy of the high-voltage battery 5 can also be used to improve the power supply to the low-voltage bus 34, thereby reducing the load on the electric energy storage 20.

[0090] The method may further comprise the step of delivering the electrical energy generated by the propulsion motor 19 when operating in the regenerative mode to the electrical energy storage 20 of the portable rescue mobile power source 10 via the first bidirectional DC / DC converter 21. This may be particularly important when the electrical energy generated by the propulsion motor 19 cannot be delivered to the high voltage battery 5 for any reason.

[0091] It will be appreciated that the foregoing description is merely exemplary in nature and is not intended to limit the present disclosure, its application, or uses. Although specific examples are described in the specification and illustrated in the drawings, those skilled in the art will appreciate that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure as defined in the claims. Although the above discussion is Figure 5 The method is described by a flowchart of the present invention, but it should be understood that one or more steps may be performed in a slightly modified order. Therefore, it is intended that the present disclosure is not limited to the specific examples shown in the drawings and described in the specification as the best mode currently conceived to implement the teachings of the present disclosure, but the scope of the present disclosure will include any implementation that falls within the foregoing description and the appended claims. The reference signs mentioned in the claims should not be regarded as limiting the content of the claims, and their only function is to make the claims easier to understand.

Claims

1. A portable rescue mobile power source (10) for an electric vehicle, wherein the portable rescue mobile power source (10) comprises an electric energy storage device (20), It is characterized in that The portable rescue mobile power source (10) further comprises: a first bidirectional DC / DC converter (21), the first bidirectional DC / DC converter having a first side connected to the electrical energy storage (20) and a second side connected to a high-voltage electrical connector (11), the high-voltage electrical connector (11) being suitable for connection to a corresponding high-voltage electrical connector (8) of the electric vehicle (1); a second bidirectional DC / DC converter (22), the second bidirectional DC / DC converter (22) having a first side connected to the electrical energy storage (20) and a second side connected to a low-voltage electrical connector (12), the low-voltage electrical connector (12) being suitable for connection to a corresponding low-voltage electrical connector (9) of the electric vehicle (1); and an electronic control unit (23), the electronic control unit (23) being configured to control the operation of the first bidirectional DC / DC converter (21) and the second bidirectional DC / DC converter (22), Wherein, the electronic control unit (23) is configured to: obtaining information about the current operating state of the high-voltage battery (5) or the high-voltage bus (28) and / or the low-voltage battery (7) or the low-voltage bus (34) of the electric vehicle (1), Taking into account the information obtained about the current operating status of the high-voltage battery (5) or the high-voltage bus (28) and / or the low-voltage battery (7) or the low-voltage bus (34), the operation of the first bidirectional DC / DC converter (21) and / or the second bidirectional DC / DC converter (22) of the portable rescue mobile power supply (10) is controlled to transfer electrical energy from the electrical energy storage (20) of the portable rescue mobile power supply (10) to any one of the high-voltage battery (5), the high-voltage bus (28), the low-voltage bus (34), the low-voltage battery (7) or the vehicle electric propulsion motor (19) of the electric vehicle to provide a drivable electric vehicle and / or extend the vehicle's driving range, Controlling the operation of the first bidirectional DC / DC converter (21) to transfer electric energy from the electric energy storage (20) of the portable rescue mobile power source (10) to any one of the high-voltage battery (5), the high-voltage bus (28) or the vehicle electric propulsion motor; and controlling the operation of the second bidirectional DC / DC converter (22) to transfer electric energy from the low-voltage battery (7) to the electric energy storage (20) and / or the input side of the first bidirectional DC / DC converter (21), and / or Controlling the operation of the second bidirectional DC / DC converter (22) to transfer electric energy from the electric energy storage (20) of the portable rescue mobile power source (10) to either the low-voltage bus (34) or the low-voltage battery (7); and controlling the operation of the first bidirectional DC / DC converter (21) to transfer electric energy from the high-voltage battery (5) to the electric energy storage (20) and / or the input side of the second bidirectional DC / DC converter (22).

2. The portable rescue mobile power supply (10) according to claim 1 further comprises a wireless transceiver module or a wired data communication connector (13) connected to the electronic control unit (23), wherein the electronic control unit (23) is configured to establish a data communication channel with the electric vehicle (1) through the wireless transceiver module or the wired data communication connector (13).

3. The portable rescue mobile power source (10) according to claim 1, wherein: The electronic control unit (23) is also configured to transmit the electric energy generated by the propulsion motor (19) when operating in the regeneration mode to the electric energy storage (20) of the portable rescue mobile power source (10) through the first bidirectional DC / DC converter (21).

4. The portable rescue mobile power source (10) according to any one of the preceding claims 1 to 3, wherein: The first bidirectional DC / DC converter (21) is configured to provide a variable output voltage level on the second side.

5. The portable rescue mobile power source (10) according to claim 4, wherein: The variable output voltage level is in the range of 48-1500 volts.

6. The portable rescue mobile power source (10) according to claim 5, wherein: The variable output voltage level is in the range of 350-1200 volts.

7. The portable rescue mobile power source (10) according to claim 4, wherein: The second bidirectional DC / DC converter (22) is also configured to provide a variable output voltage level on the second side.

8. The portable rescue mobile power source (10) according to claim 7, wherein: The variable output voltage level is in the range of 10-59 volts.

9. The portable rescue mobile power source (10) according to claim 8, wherein: The variable output voltage level is in the range of 12-32 volts.

10. The portable rescue mobile power source (10) according to claim 9, wherein: The variable output voltage level is in the range of 12-16 volts.

11. The portable rescue mobile power source (10) according to any one of the preceding claims 1 to 3, in, The high voltage electrical connector (11) and the low voltage electrical connector (12) are separate, individual electrical connectors, or Wherein, the high-voltage electrical connector (11) and the low-voltage electrical connector (12) are integrated into a single electrical connector.

12. The portable rescue mobile power source (10) according to any one of the preceding claims 1 to 3, wherein: The power storage (20) of the portable rescue power bank (10) has a voltage level in the range of 12-59 volts.

13. The portable rescue mobile power source (10) according to claim 12, wherein: The power storage (20) of the portable rescue mobile power source (10) has a voltage level in the range of 12-48 volts.

14. The portable rescue mobile power source (10) according to claim 13, wherein: The power storage (20) of the portable rescue mobile power source (10) has a voltage level in the range of 12-24 volts.

15. The portable rescue mobile power source (10) according to any one of the preceding claims 1 to 3, wherein: The portable rescue mobile power supply also includes a housing (15) for accommodating and protecting the components of the portable rescue mobile power supply (10) from external influences, wherein the housing (15) has a carrying handle (14) for enabling a user to simplify transportation handling.

16. An electric vehicle (1), comprising: a high voltage battery (5) for vehicle propulsion and a main charging connector (6) accessible from outside the vehicle and configured for charging the high voltage battery (5), a low voltage battery (7) for powering the vehicle's safety functions, a high-voltage electrical connector (8) connected to the high-voltage battery (5) or to a high-voltage busbar (28) associated with the high-voltage battery (5), wherein the high-voltage electrical connector (8) is configured to be connected to a portable rescue mobile power source (10), and a low-voltage electrical connector (9) connected to the low-voltage battery (7) or to a low-voltage busbar (34) associated with the low-voltage battery (7), wherein the low-voltage electrical connector (9) is also configured to be connected to the portable rescue mobile power source (10), Wherein, the portable rescue mobile power supply (10) is configured according to any one of claims 1 to 15.

17. The electric vehicle according to claim 16, wherein: The high voltage electrical connector (8) and the low voltage electrical connector (9) are both located in the luggage compartment of the vehicle (1).

18. The electric vehicle according to claim 16 or claim 17, further comprising a DC / DC converter (29) connecting the high voltage bus (28) to the low voltage bus (34), a power converter (27) connected to the high voltage bus (28) and to an electric propulsion motor (19) of a vehicle powertrain, a main electrical contactor (26) located in the high voltage bus (28) between the high voltage battery (5) and the power converter (27), in, The high voltage electrical connector (8) is connected to the high voltage busbar (28) between the main electrical contactor (26) and the power converter (27).

19. A method of using a portable rescue mobile power source (10), the method comprising: Connecting a high-voltage electrical connector (11) of the portable rescue mobile power source (10) to a corresponding high-voltage electrical connector (8) of the electric vehicle (1), and connecting a low-voltage electrical connector (12) of the portable rescue mobile power source (10) to a corresponding low-voltage electrical connector (9) of the electric vehicle (1), wherein the high-voltage electrical connector (11) and the low-voltage electrical connector (12) are different from a main charging connector (6) of the electric vehicle (1); Obtaining information about a current operating state of a high voltage battery (5) or a high voltage bus (28) associated with the high voltage battery (5) and information about a current operating state of a low voltage battery (7) or a low voltage bus (34) associated with the low voltage battery (7); as well as Taking into account the information obtained about the current operating status of the high-voltage battery (5) or the high-voltage bus (28) and / or the low-voltage battery (7) or the low-voltage bus (34), the operation of the first bidirectional DC / DC converter (21) and / or the second bidirectional DC / DC converter (22) of the portable rescue mobile power supply (10) is controlled to transfer electrical energy from the electrical energy storage (20) of the portable rescue mobile power supply (10) to any one of the high-voltage battery (5), the high-voltage bus (28), the low-voltage bus (34), the low-voltage battery (7) or the vehicle electric propulsion motor to provide a drivable electric vehicle and / or extend the vehicle's driving range, The step of controlling the operation of the first bidirectional DC / DC converter (21) to transfer electric energy from the electric energy storage (20) of the portable rescue mobile power source (10) to any one of the high-voltage battery (5), the high-voltage bus (28) or the vehicle electric propulsion motor additionally includes controlling the operation of the second bidirectional DC / DC converter (22) to transfer electric energy from the low-voltage battery (7) to the electric energy storage (20) and / or the input side of the first bidirectional DC / DC converter (21), and / or The step of controlling the operation of the second bidirectional DC / DC converter (22) to transfer electric energy from the electric energy storage (20) of the portable rescue mobile power source (10) to either the low-voltage bus (34) or the low-voltage battery (7) additionally includes controlling the operation of the first bidirectional DC / DC converter (21) to transfer electric energy from the high-voltage battery (5) to the input side of the electric energy storage (20) and / or the second bidirectional DC / DC converter (22).

20. The method of using a portable rescue mobile power source (10) according to claim 19, wherein: The steps of controlling the operation of the first bidirectional DC / DC converter (21) and / or the second bidirectional DC / DC converter (22) to provide a drivable electric vehicle and / or vehicle range extension under consideration of the information obtained about the current operating state of the high-voltage battery (5) or the high-voltage bus (28) and / or the low-voltage battery (7) or the low-voltage bus (34) include: When the information obtained about the operating state of the high-voltage battery (5) or the high-voltage bus (28) indicates that there is not enough voltage level to drive the electric vehicle or the charging state of the high-voltage battery (5) is below a threshold, controlling the operation of the first bidirectional DC / DC converter (21) to provide an output voltage level sufficient to drive the electric vehicle, and / or When the information obtained about the operating status of the low-voltage battery (7) or the low-voltage bus (34) indicates that there is not enough voltage level to operate the vehicle safety function, the operation of the second bidirectional DC / DC converter (22) is controlled to provide an output voltage level sufficient to operate the vehicle safety function.

21. The method for using a portable rescue mobile power source (10) according to any one of the preceding claims 19 to 20 further comprises transmitting the electrical energy generated by the propulsion motor (19) when operating in a regenerative mode to the electrical energy storage (20) of the portable rescue mobile power source (10) via the first bidirectional DC / DC converter (21).

22. A method of connecting a portable rescue mobile power source (10) to an electric vehicle (1), wherein: The electric vehicle (1) comprises a high-voltage battery (5) for vehicle propulsion, a main charging connector (6) accessible from outside the vehicle and configured to charge the high-voltage battery (5), a low-voltage battery (7) for powering vehicle safety functions, a high-voltage electrical connector (8) connected to the high-voltage battery (5) or to a high-voltage busbar (28) associated with the high-voltage battery (5), and a low-voltage electrical connector (9) connected to the low-voltage battery (7) or to a low-voltage busbar (34) associated with the low-voltage battery (7), the method comprising: The high-voltage electrical connector (11) of the portable rescue mobile power source (10) is connected to the high-voltage electrical connector (8) of the electric vehicle, and the low-voltage electrical connector (12) of the portable rescue mobile power source (10) is connected to the low-voltage electrical connector (9) of the electric vehicle, wherein the high-voltage electrical connector (11) and the low-voltage electrical connector (12) of the portable rescue mobile power source (10) are separate electrical connectors or are integrated into a single electrical connector. Wherein, the portable rescue mobile power supply (10) is configured according to any one of claims 1 to 15.

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