Monitoring system for monitoring working condition of electric drive axle of vehicle and electric drive axle for vehicle

Abstract

Disclosed is a monitoring system (11) for monitoring the operating condition of an electric drive axle (1) of a vehicle, comprising: at least one sensor (111) arranged on the electric drive axle for detecting vibrations of the electric drive axle; the at least one power supply device (112) is arranged on the electric drive axle and can vibrate along with the electric drive axle, the power supply device comprises a vibration energy collector (1121), and the vibration energy collector is configured to be used for collecting vibration energy of the electric drive axle and converting the vibration energy into electric energy so that the power supply device can supply power to the sensor, at least one of the at least one sensors (111) is arranged at least adjacent to at least a corresponding one of the at least one power supply means (112). A corresponding electric drive axle (1) for a vehicle is also disclosed. According to some embodiments of the utility model, the monitoring system can work more reliably without special power supply.

Description

Technical Field

[0001] The utility model relates to a monitoring system for monitoring the working condition of an electric drive axle of a vehicle (especially an electric commercial vehicle) and a corresponding electric drive axle for the vehicle. Background Art

[0002] The increasing environmental protection requirements and the inherent need to improve the performance of vehicles have led to the increasing popularity of electric vehicles. In particular, the electrification of commercial vehicles has become a future development trend. For commercial vehicles, more and more suppliers are beginning to focus on the development of electric drive axles. Electric drive axles mainly integrate the motor and gearbox directly on the axle, which can improve the efficiency of the drive system and save space, thereby saving more space for the battery, which can give the vehicle a longer driving range.

[0003] Although electric drive axles have many advantages, they also have some disadvantages. For example, the axles of electric drive axles are usually rigid structures, which will produce relatively large vibrations when the vehicle is driving, so the motor and gearbox will also vibrate violently. If the strength of some parts of the electric drive axle is not enough, this large vibration will cause some parts of the electric drive axle to malfunction or become abnormal. In order to keep the transmission system in good working condition, it is necessary to equip it with a corresponding monitoring system for diagnosis, especially for those key components.

[0004] The current monitoring system usually uses sensors installed at certain parts of the electric drive axle for monitoring. These sensors are powered by batteries, and the sensors and batteries are connected by wires. Due to the above-mentioned vibration reasons and the harsh working environment of the electric drive axle, the wire connection is easily damaged.

[0005] Therefore, there is a need for continuous improvement. Utility Model Content

[0006] Therefore, the object of the present invention is to provide an improved monitoring system for monitoring the working condition of an electric drive axle of a vehicle (especially an electric commercial vehicle) and a corresponding electric drive axle for the vehicle.

[0007] According to a first aspect of the utility model, a monitoring system for monitoring the working condition of an electric drive axle of a vehicle is provided, the monitoring system comprising: at least one sensor arranged on the electric drive axle, the sensor being used to detect the vibration of the electric drive axle; and at least one power supply device arranged on the electric drive axle and capable of following the vibration of the electric drive axle, the power supply device comprising a vibration energy collector, the vibration energy collector being configured to collect the vibration energy of the electric drive axle and convert the vibration energy into electrical energy so that the power supply device can supply power to the sensor, wherein at least one of the at least one sensor is arranged at least adjacent to at least one corresponding one of the at least one power supply device.

[0008] According to a second aspect of the utility model, an electric drive axle for a vehicle is provided, wherein the electric drive axle comprises the monitoring system.

[0009] According to certain embodiments of the utility model, the monitoring system can operate more reliably, without the need to deploy special wires for external power supply, and simplifies the deployment, eliminates the need to specially equip corresponding batteries, saves corresponding power consumption, and avoids the situation where the monitoring system cannot work normally due to insufficient battery power reserves. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be described in more detail below with reference to the accompanying drawings, so that the principles, features and advantages of the present invention can be better understood. The accompanying drawings include:

[0011] Figure 1 The principle diagram of a monitoring system for monitoring the working condition of an electric drive axle of a vehicle, especially an electric commercial vehicle, according to an exemplary embodiment of the present utility model is schematically shown.

[0012] Figure 2 A combination of a sensor and a power supply device according to an exemplary embodiment of the present invention is schematically shown alone.

[0013] Figure 3 The principle diagram of a vibration energy harvester of a power supply device according to an exemplary embodiment of the present utility model is schematically shown.

[0014] Figure 4 A flow chart of a method for operating the above-described monitoring system according to an exemplary embodiment is shown. DETAILED DESCRIPTION

[0015] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the scope of protection of the present invention.

[0016] Figure 1 The principle diagram of a monitoring system for monitoring the working condition of an electric drive axle of a vehicle, especially an electric commercial vehicle, according to an exemplary embodiment of the present utility model is schematically shown.

[0017] Figure 2 A combination of a sensor 111 and a power supply device 112 according to an exemplary embodiment of the present invention is schematically shown alone.

[0018] According to an exemplary embodiment of the present invention, Figure 1 and Figure 2 As shown, the monitoring system 11 includes: at least one sensor 111 arranged on the electric drive bridge 1, and the sensor 111 is used to detect the vibration of the electric drive bridge 1; and at least one power supply device 112 arranged on the electric drive bridge 1 and capable of following the vibration of the electric drive bridge 1, the power supply device 112 includes a vibration energy collector 1121, and the vibration energy collector 1121 is configured to collect the vibration energy of the electric drive bridge 1 and convert the vibration energy into electrical energy so that the power supply device 112 can supply power to the sensor 111, wherein at least one of the at least one sensor 111 is arranged at least adjacent to at least one corresponding one of the at least one power supply device 112.

[0019] like Figure 1 As shown, the electric drive axle 1 includes a plurality of components assembled together, and the plurality of components mainly include an axle 12 (especially the rear axle of the vehicle) and a motor 13 and a gearbox 14 mounted on the axle 12. The axle 12 is usually a rigid axle, and the motor 13 as a power source generates rotational power, which is transmitted to the wheels 2 through the gearbox 14 to drive the vehicle to travel. The axle 12 will vibrate violently when the vehicle is traveling, so that the motor 13 and the gearbox 14 mounted thereon will also experience large vibrations and are prone to failure.

[0020] like Figure 1 and Figure 2 As shown, the sensor 111 directly uses the electrical energy generated by vibration through the vibration energy collector 1121 of the power supply device 112 to work, so there is no need to connect special wires for power supply. This can greatly simplify the configuration of the system, greatly improve the reliability of the system, and also reduce the corresponding power consumption.

[0021] Those skilled in the art will appreciate that the proximity of the sensor 111 to the corresponding power supply device 112 can shorten or even eliminate the connecting wire between them, which is very beneficial to the system configuration. There are other considerations for adopting this arrangement, and many advantages can be achieved, which will be gradually described below.

[0022] Preferably, at least one of the at least one sensor 111 and at least one corresponding one of the at least one power supply device 112 are arranged at the same position.

[0023] According to an exemplary embodiment of the present invention, the monitoring system 11 is configured to enable the detection signal of the sensor 111 to be transmitted to the evaluation and analysis unit (not shown) in a wireless manner. This means that the detection signal of the sensor 111 can be transmitted to the evaluation and analysis unit without any wires, thereby basically realizing the wire-free deployment of the entire monitoring system 11. To this end, the sensor 111 can be equipped with a transmitting antenna, for example, to send the detection signal to the corresponding evaluation and analysis unit for evaluation and analysis through the transmitting antenna.

[0024] The evaluation and analysis unit may be an electronic control unit (ECU) of the vehicle, or a cloud server, or a combination of the two. The cloud server may store historical data of each vehicle, and these historical data may be used to construct a more reliable analysis and evaluation model through big data analysis.

[0025] According to an exemplary embodiment of the present invention, Figure 1 and Figure 2 As shown, the sensors 111 and the power supply device 112 arranged at least adjacent to each other can form corresponding independent monitoring units 113, and in each monitoring unit 113, the sensor 111 can be powered only by the corresponding power supply device 112. This means that each independent monitoring unit 113 can be self-sustaining, so that the monitoring system 11 can be conveniently deployed.

[0026] Each monitoring unit 113 may include a single sensor 111 and a single power supply device 112. This approach is simple and reliable, and can already achieve sufficient and reliable detection of the corresponding position.

[0027] According to an exemplary embodiment of the present invention, at least one monitoring unit 113 is provided on at least one of the multiple components of the electric drive bridge 1 to monitor the working condition of the corresponding component. Preferably, corresponding monitoring units 113 are provided on all relevant components. Figure 1 As shown, corresponding monitoring units 113 are provided on the axle 12 , the motor 13 and the gearbox 14 , so that a relatively comprehensive detection of the entire electric drive bridge 1 can be achieved.

[0028] During the driving process of the electric drive bridge 1, the vibration characteristics of various parts will be different, some parts vibrate more, while some parts vibrate less, and the vibration characteristics of different vehicles will also be different. If the sensor 111 is placed on a part with greater vibration, the sensor 111 can output a larger detection signal, and the part with greater vibration can often better reflect the working condition of the corresponding part of the electric drive bridge 1, that is, at this part, when an abnormality or a fault occurs, the signal detected by the sensor 111 will be greatly different from the detection signal in the normal state, which makes it easy to judge whether there is an abnormality or a fault. Therefore, according to an exemplary embodiment of the utility model, the monitoring units 113 are respectively arranged at corresponding predetermined monitoring positions on the electric drive bridge 1, and the predetermined monitoring positions are determined based on at least the vibration characteristics of the electric drive bridge 1 during normal operation and / or the vibration characteristics during abnormal operation.

[0029] Further, the predetermined monitoring position is determined based on at least a deviation between the vibration characteristics of the electric drive axle 1 during normal operation and the vibration characteristics of the electric drive axle 1 during abnormal operation.

[0030] On the other hand, for the vibration energy harvester 1121, the stronger the vibration, the more vibration energy can be harvested. Therefore, from this perspective, it may also be beneficial to place the vibration energy harvester 1121 at a location with greater vibration.

[0031] Those skilled in the art can understand that placing the vibration energy collector 1121 at a location of the electric drive bridge 1 where vibration is greater does not necessarily mean that the vibration energy collector 1121 will collect more vibration energy. This is also related to the vibration energy collection characteristics of the vibration energy collector 1121 itself.

[0032] To this end, according to an exemplary embodiment of the present utility model, the predetermined monitoring position is determined based on at least the vibration characteristics of the electric drive bridge 1 during normal operation and the vibration energy collection characteristics of the vibration energy collector 1121 .

[0033] Obviously, it is advantageous that the vibration energy harvester 1121 can be configured to adapt its vibration energy harvesting characteristics to the vibration characteristics of the electric drive axle 1 during normal operation.

[0034] More advantageously, the vibration energy harvester 1121 is configured to resonate with the vibration at the corresponding predetermined monitoring position when the electric drive bridge 1 is operating normally.

[0035] When the resonance point is reached, the vibration energy harvester 1121 is able to harvest more vibration energy, thereby generating more electrical energy.

[0036] According to an exemplary embodiment of the present invention, Figure 2As shown, the power supply device 112 may further include a battery 1122 and an AC-DC converter 1123. The electric energy generated by the vibration energy harvester 1121 is converted by the AC-DC converter 1123 and stored in the battery 1122. The battery 1122 supplies power to the sensor 111. The battery 1122 may be a rechargeable battery.

[0037] According to an exemplary embodiment of the utility model, the sensor 111 and the corresponding power supply device 112 can be packaged into one body, that is, packaged together. This is very advantageous, not only facilitating installation and deployment, but also enabling it to work reliably in a relatively harsh environment, and thus being particularly suitable for the electric drive axle 1 of a vehicle. On the other hand, when packaged in one body, possible wire connections between the sensor 111 and the corresponding power supply device 112 and possible wire connections between various components of the power supply device 112 are more reliable and less prone to damage.

[0038] As described above, the vibration characteristics of the electric drive axle 1 may be different for different vehicles or different electric drive axles 1 , so it is very advantageous if the vibration energy harvester 1121 is configured so that its resonance frequency is adjustable.

[0039] Those skilled in the art will appreciate that the vibration energy collector 1121 may be in various forms, such as electromagnetic, piezoelectric, frictional power generation, etc. The present invention does not limit this.

[0040] Figure 3 The schematic diagram of a vibration energy harvester 1121 according to an exemplary embodiment of the present invention is shown schematically.

[0041] like Figure 3 As shown, the vibration energy collector 1121 may include a mass block 1124, a spring system 1125 and a piezoelectric generator 1126. When the electric drive bridge 1 vibrates, the mass block 1124 also vibrates up and down under the action of the spring system 1125, thereby generating a corresponding force on the piezoelectric generator 1126, which can enable the piezoelectric generator 1126 to generate electrical energy. Therefore, it can be considered that the vibration energy collector 1121 is piezoelectric. The sensor 111 can be arranged on the piezoelectric generator 1126.

[0042] For this arrangement, the vibration characteristics, in particular the frequency characteristics, of the vibration energy harvester 1121 can be adjusted by adjusting the weight of the mass block 1124 and / or the parameters (eg, spring coefficient) of the spring system 1125 .

[0043] In addition, according to an exemplary embodiment of the utility model, the sensor 111 can be configured to receive electrical energy from the power supply device 112 in a controllable manner. This means that the sensor 111 can be activated at a selected time point, for example, periodically. It can be understood that, for example, the electric drive axle 1 is monitored regularly, and the working condition of the electric drive axle 1 can also be judged in time. This non-continuous monitoring can save the consumption of electrical energy, which is very beneficial. When the vehicle is stopped, for example, the engine is turned off, the sensor 111 can be turned off, for example, remotely turned off by the vehicle's electronic control unit. The state of the vehicle can also be judged based on the vibration condition of the vehicle's electric drive axle 1. For example, when it is found that the electric drive axle 1 is no longer vibrating (for example, the vehicle is turned off), the sensor 111 can be turned off to save electrical energy.

[0044] As mentioned above, the arrangement position of the sensor 111 should be considered to be able to detect the fault / abnormality of the electric drive bridge 1 more easily and reliably, and the vibration energy collector 1121 should be considered to be able to collect more vibration energy. The vibration characteristics of various parts of the electric drive bridge 1 are different, so it is necessary to balance and match the three. For example, the vibration characteristics of various parts of the electric drive bridge 1 can be determined by simulation analysis, such as finite element analysis or experimental analysis, and then the arrangement position of the sensor 111 and / or the vibration energy collector 1121 (or the entire power supply device 112) and the vibration characteristics of the vibration energy collector 1121 are determined based on the vibration characteristics. The present utility model has made full consideration and balance in these three aspects.

[0045] Figure 4 A flow chart of a method for operating the above-described monitoring system 11 according to an exemplary embodiment is shown.

[0046] like Figure 4 As shown, the method includes: step S1, in which a detection signal is obtained from the sensor 111 of the monitoring system 11; and step S2, in which the detection signal is analyzed and evaluated based on an analysis and evaluation model to determine the working condition of the electric drive bridge 1, wherein the analysis and evaluation model can be established and / or updated based on historical monitoring data of the electric drive bridge 1 and / or simulation analysis data and / or experimental data of the electric drive bridge 1.

[0047] As described above, the vibration characteristics of each part of the electric drive axle 1 when it is working normally can be determined through simulation analysis as a judgment benchmark. If it deviates from the benchmark to a certain extent, it can be considered that the corresponding part of the electric drive axle 1 has a fault / abnormality.

[0048] The invention also relates to a computer program product, for example a computer-readable program carrier, wherein the computer program product comprises computer program instructions which are capable of implementing the above method when executed by (one or more) processors.

[0049] Moreover, other advantages and alternative embodiments of the present invention are obvious to those skilled in the art. Therefore, the present invention in its broader sense is not limited to the specific details, representative structures and exemplary embodiments shown and described. On the contrary, those skilled in the art can make various modifications and substitutions without departing from the basic spirit and scope of the present invention.

[0050] Reference numerals list

[0051] 1 Electric drive axle

[0052] 2 wheels

[0053] 11 Monitoring system

[0054] 12 Axles

[0055] 13 Motor

[0056] 14 Gearbox

[0057] 111 Sensor

[0058] 112 Power supply device

[0059] 113 Monitoring Unit

[0060] 1121 Vibration Energy Harvester

[0061] 1122 Accumulator

[0062] 1123 AC-DC Converter

[0063] 1124 Mass Block

[0064] 1125 Spring System

[0065] 1126 Piezoelectric power generation device.

Claims

1. A monitoring system for monitoring the working condition of an electric drive axle of a vehicle, characterized in that: The monitoring system (11) comprises: at least one sensor (111) provided on the electric drive bridge (1), the sensor (111) being used to detect vibration of the electric drive bridge (1); and At least one power supply device (112) is provided on the electric drive bridge (1) and is capable of following the vibration of the electric drive bridge (1), wherein the power supply device (112) includes a vibration energy collector (1121), and the vibration energy collector (1121) is configured to collect vibration energy of the electric drive bridge (1) and convert the vibration energy into electrical energy so that the power supply device (112) can supply power to the sensor (111). wherein at least one of the at least one sensor (111) is arranged at least adjacent to at least a corresponding one of the at least one power supply device (112); The sensors (111) and the power supply device (112) arranged at least adjacent to each other form corresponding independent monitoring units (113) and are able to achieve self-sufficiency. In each monitoring unit (113), the sensor (111) is only powered by the corresponding power supply device (112).

2. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 1, characterized in that: At least one of the at least one sensor (111) and at least one corresponding one of the at least one power supply device (112) are arranged at the same position; and / or The monitoring system (11) is configured to enable the detection signal of the sensor (111) to be transmitted to an evaluation and analysis unit in a wireless manner.

3. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 1 or 2, characterized in that: Each monitoring unit (113) includes a single sensor (111) and a single power supply (112).

4. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 1 or 2, characterized in that: The electric drive bridge (1) comprises a plurality of components assembled together, and at least one of the plurality of components is provided with at least one monitoring unit (113) for monitoring the working condition of the corresponding component.

5. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 4, characterized in that: The plurality of components include an axle (12), a motor (13) and a gearbox (14) mounted on the axle (12).

6. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to any one of claims 1 to 2 and 5, characterized in that: The monitoring units (113) are respectively arranged at predetermined monitoring positions on the electric drive axle (1), and the predetermined monitoring positions are determined based on at least the vibration characteristics of the electric drive axle (1) during normal operation and / or the vibration characteristics of the electric drive axle (1) during abnormal operation.

7. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 3, characterized in that: The monitoring units (113) are respectively arranged at predetermined monitoring positions on the electric drive axle (1), and the predetermined monitoring positions are determined based on at least the vibration characteristics of the electric drive axle (1) during normal operation and / or the vibration characteristics of the electric drive axle (1) during abnormal operation.

8. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 4, characterized in that: The monitoring units (113) are respectively arranged at predetermined monitoring positions on the electric drive axle (1), and the predetermined monitoring positions are determined based on at least the vibration characteristics of the electric drive axle (1) during normal operation and / or the vibration characteristics of the electric drive axle (1) during abnormal operation.

9. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 6, characterized in that: The predetermined monitoring position is determined based on at least the vibration characteristics of the electric drive bridge (1) during normal operation and the vibration energy collection characteristics of the vibration energy collector (1121); and / or The predetermined monitoring position is determined based on at least a deviation between the vibration characteristics of the electric drive axle (1) during normal operation and the vibration characteristics during abnormal operation.

10. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 7 or 8, characterized in that: The predetermined monitoring position is determined based on at least the vibration characteristics of the electric drive bridge (1) during normal operation and the vibration energy collection characteristics of the vibration energy collector (1121); and / or The predetermined monitoring position is determined based on at least a deviation between the vibration characteristics of the electric drive axle (1) during normal operation and the vibration characteristics during abnormal operation.

11. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 9, characterized in that: The vibration energy collector (1121) is configured so that its vibration energy collection characteristics are adapted to the vibration characteristics of the electric drive bridge (1) during normal operation.

12. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 10, characterized in that: The vibration energy collector (1121) is configured so that its vibration energy collection characteristics are adapted to the vibration characteristics of the electric drive bridge (1) during normal operation.

13. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 11 or 12, characterized in that: The vibration energy collector (1121) is configured to resonate with the vibration at a corresponding predetermined monitoring position when the electric drive bridge (1) is operating normally.

14. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to any one of claims 1-2, 5, 7-9, 11-12, characterized in that: The power supply device (112) further comprises an accumulator (1122) and an AC-DC converter (1123); the electric energy generated by the vibration energy harvester (1121) is converted by the AC-DC converter (1123) and stored in the accumulator (1122); the accumulator (1122) supplies power to the sensor (111); and / or The sensor (111) and the corresponding power supply device (112) are packaged into one body.

15. The monitoring system for monitoring the working condition of the electric drive axle of a vehicle according to claim 3, characterized in that: The power supply device (112) further comprises an accumulator (1122) and an AC-DC converter (1123); the electric energy generated by the vibration energy harvester (1121) is converted by the AC-DC converter (1123) and stored in the accumulator (1122); the accumulator (1122) supplies power to the sensor (111); and / or The sensor (111) and the corresponding power supply device (112) are packaged into one body.

16. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 4, characterized in that: The power supply device (112) further comprises an accumulator (1122) and an AC-DC converter (1123); the electric energy generated by the vibration energy harvester (1121) is converted by the AC-DC converter (1123) and stored in the accumulator (1122); the accumulator (1122) supplies power to the sensor (111); and / or The sensor (111) and the corresponding power supply device (112) are packaged into one body.

17. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 6, characterized in that: The power supply device (112) further comprises an accumulator (1122) and an AC-DC converter (1123); the electric energy generated by the vibration energy harvester (1121) is converted by the AC-DC converter (1123) and stored in the accumulator (1122); the accumulator (1122) supplies power to the sensor (111); and / or The sensor (111) and the corresponding power supply device (112) are packaged into one body.

18. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 10, characterized in that: The power supply device (112) further comprises an accumulator (1122) and an AC-DC converter (1123); the electric energy generated by the vibration energy harvester (1121) is converted by the AC-DC converter (1123) and stored in the accumulator (1122); the accumulator (1122) supplies power to the sensor (111); and / or The sensor (111) and the corresponding power supply device (112) are packaged into one body.

19. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to any one of claims 1-2, 5, 7-9, 11-12, 15-18, characterized in that: The vibration energy harvester (1121) is configured such that its resonant frequency is adjustable; and / or The sensor (111) is configured to receive electrical energy from the power supply (112) in a controllable manner.

20. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 3, characterized in that: The vibration energy harvester (1121) is configured such that its resonant frequency is adjustable; and / or The sensor (111) is configured to receive electrical energy from the power supply (112) in a controllable manner.

21. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 4, characterized in that: The vibration energy harvester (1121) is configured such that its resonant frequency is adjustable; and / or The sensor (111) is configured to receive electrical energy from the power supply (112) in a controllable manner.

22. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 6, characterized in that: The vibration energy harvester (1121) is configured such that its resonant frequency is adjustable; and / or The sensor (111) is configured to receive electrical energy from the power supply (112) in a controllable manner.

23. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 10, characterized in that: The vibration energy harvester (1121) is configured such that its resonant frequency is adjustable; and / or The sensor (111) is configured to receive electrical energy from the power supply (112) in a controllable manner.

24. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 13, characterized in that: The vibration energy harvester (1121) is configured such that its resonant frequency is adjustable; and / or The sensor (111) is configured to receive electrical energy from the power supply (112) in a controllable manner.

25. The monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to claim 14, characterized in that: The vibration energy harvester (1121) is configured such that its resonant frequency is adjustable; and / or The sensor (111) is configured to receive electrical energy from the power supply (112) in a controllable manner.

26. An electric drive axle for a vehicle, wherein: The electric drive axle (1) comprises a monitoring system for monitoring the working condition of an electric drive axle of a vehicle according to any one of claims 1 to 25.

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