Power drive system and vehicle

Abstract

The application provides a power driving system and a vehicle, and belongs to the technical field of vehicles. The power driving system comprises a suspension assembly and an electric driving assembly. Three suspensions of the suspension assembly are distributed on three sides of the electric driving assembly, so that the electric driving assembly is at least partially located in a region in the shape of a triangle surrounded by the three suspensions, and the height of the center of each of the three suspensions and the gravity center of the electric driving assembly is basically the same. Based on the above arrangement, the three suspensions of the suspension assembly can all play a role in resisting torsion and limiting, so that the power driving system is suitable for an electric vehicle with large torque. In addition, the center height of the connection structure of the three suspensions is basically the same, so that the overall structure of the suspension assembly is more compact, and the modal performance of the overall suspension assembly is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a power drive system and vehicle. Background Technology

[0002] The powertrain system is a crucial component of a vehicle, primarily consisting of the powertrain, mounting system, and drive shaft. The powertrain is mounted to the vehicle via the mounting system, which mainly provides support, vibration isolation, and torsional limiting.

[0003] In related technologies, the suspension assembly usually adopts a pendulum arrangement, that is, the left and right suspensions of the suspension assembly are mounted on the longitudinal beams of the vehicle body, mainly for support and vibration isolation, while the rear suspension is mounted on the subframe, mainly for torsional resistance and vibration isolation.

[0004] However, the above-mentioned arrangement is not suitable for electric vehicles, mainly because: the electric drive assembly of electric vehicles is small in size but generates large torque during operation. Using the existing arrangement, only the rear suspension bears the acceleration and torsional resistance function, which can easily lead to large stress and displacement on the suspension, resulting in a noticeable acceleration shock and significantly reducing vehicle ride comfort. Furthermore, the pendulum-style suspension arrangement results in a relatively long suspension bracket design, leading to lower bracket modal performance and often causing noise problems such as booming sounds inside the vehicle during acceleration. Summary of the Invention

[0005] In view of this, this application provides a power drive system in which all three mounts of the mount assembly can act as anti-torsional limiters, thus making it suitable for electric vehicles with high torque.

[0006] Specifically, the following technical solutions are included:

[0007] In a first aspect, embodiments of this application provide a power drive system, characterized in that the power drive system is applied to an electric vehicle, and the power drive system includes a suspension assembly and an electric drive assembly;

[0008] The suspension assembly includes a first suspension, a second suspension, and a third suspension;

[0009] The first mount, the second mount, and the third mount each include a connecting structure. The first mount, the second mount, and the third mount are respectively connected to the electric drive assembly through their respective connecting structures, and the first mount, the second mount, and the third mount are not on the same straight line.

[0010] The center of the first suspension connection structure, the center of the second suspension connection structure, the center of the third suspension connection structure, and the center of gravity of the electric drive assembly are at the same height, wherein the center of the first suspension, the center of the second suspension, and the center of the third suspension are located on their respective connection structures.

[0011] Optionally, the center of gravity of the electric drive assembly coincides with the centroid of the triangle formed by the centers of the first suspension, the second suspension, and the third suspension.

[0012] Optionally, the connection structure includes a bushing, a connection assembly, and a buffer.

[0013] The buffer element is fitted inside the bushing and connected to the outside of the connecting assembly;

[0014] The connection component is connected to the electric drive assembly.

[0015] Optionally, the buffer is made of rubber, and there is a deformation space between the buffer and the connecting assembly.

[0016] Optionally, the connecting component includes a core and a connecting portion;

[0017] The core has a hollow structure, the connecting part is fitted inside the hollow structure, and one end of the connecting part is connected to the electric drive assembly.

[0018] Optionally, the first suspension, the second suspension, and the third suspension all further include a support housing;

[0019] The supporting housing includes a base portion and a fitting portion that are connected to each other;

[0020] The connecting structure is fitted into the fitting portion;

[0021] The first, second, and third suspensions are connected to the vehicle via their respective base portions.

[0022] Optionally, the power drive system further includes a subframe;

[0023] The first suspension, the second suspension, and the third suspension are connected to the subframe via their respective base portions.

[0024] Optionally, the electric drive assembly includes a drive motor, a reducer, and a controller;

[0025] The reducer is connected to the output end of the drive motor;

[0026] The controller is electrically connected to the drive motor;

[0027] The drive motor, the reducer, and the controller are located close to each other and integrated into one unit.

[0028] Optionally, the power drive system further includes a first drive shaft and a second drive shaft;

[0029] The first drive shaft and the second drive shaft are connected to the power output end of the electric drive assembly.

[0030] In a second aspect, a vehicle is provided, said vehicle being an electric vehicle, including the power drive system provided in any embodiment of the first aspect.

[0031] In the power drive system provided in this application embodiment, the three mounts of the suspension assembly are respectively distributed on the three sides of the electric drive assembly, so that the electric drive assembly is at least partially located within the roughly triangular area enclosed by the three mounts, and the center of the connection structure of each of the three mounts is at approximately the same height as the center of gravity of the electric drive assembly. Based on the above arrangement, all three mounts of the suspension assembly can play a role in anti-torsional limiting. As a result, the force on the three mounts is more even during vehicle acceleration, resulting in superior driving comfort. Therefore, the power drive system provided in this application embodiment is suitable for electric vehicles with high torque. In addition, the center height of the connection structure of the three mounts is approximately the same, so the overall structure of the suspension assembly is more compact, improving the overall modal performance of the suspension assembly. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a power drive system provided in one embodiment of this application;

[0034] Figure 2 for Figure 1 Schematic diagram of the suspension assembly of the power drive system;

[0035] Figure 3 for Figure 2 A schematic diagram of the structure of the second suspension of the suspension assembly in the middle;

[0036] Figure 4 for Figure 3 A schematic diagram of the connection structure of the first suspension in the middle;

[0037] Figure 5 for Figure 2A schematic diagram of the exploded structure of the first suspension of the suspension assembly in the middle;

[0038] Figure 6 for Figure 1 A schematic diagram of the electric drive assembly of the medium-power drive system.

[0039] The reference numerals in the figure indicate:

[0040] 1-Suspension assembly;

[0041] 11-First suspension; 12-Second suspension; 13-Third suspension;

[0042] 111 - Connection structure;

[0043] 1111-Bushing; 1112-Connecting assembly; 1113-Buffer component;

[0044] 11121 - Core; 11122 - Connecting part;

[0045] 113 - Supporting housing;

[0046] 1131 - Base part; 1132 - Fitting part; 1133 - Connecting bolt;

[0047] 2-Electric drive assembly;

[0048] 21-Drive motor; 22-Reducer; 23-Controller;

[0049] 3-Subframe;

[0050] 4-First drive shaft;

[0051] 5 - Second drive shaft;

[0052] X-Deformation Space. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] In the embodiments of this application, the "subframe" refers to the frame of the front and rear axles, which is a component of the front and rear axles. The subframe is not a complete frame, but only a bracket that supports the front and rear axles and suspension, allowing the axles and suspension to be connected to the "main frame" through it. Therefore, it is conventionally called a "subframe".

[0055] The "body-in-white" mentioned generally refers to the body that has been welded but not yet painted. The painted body-in-white, along with the interior and exterior trim (including the dashboard, seats, windshield, carpets, interior trim panels, etc.), the electronic and electrical systems (audio, wiring harnesses, switches, etc.), the chassis system (including braking and suspension systems, etc.), and the powertrain system (including the engine, transmission, etc.), constitutes the complete vehicle.

[0056] In this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined. Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art. Some technical terms appearing in the embodiments of this application are described below.

[0057] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0058] In related technologies, suspension assemblies typically employ a pendulum-style arrangement, where the left and right suspensions are mounted on the vehicle's longitudinal beams, while the rear suspension is mounted on the subframe. Because the longitudinal beams are higher than the subframe, the centers of the connecting structures for the left, right, and rear suspensions are not on the same plane as the powertrain's center of gravity. Consequently, only the rear suspension undertakes acceleration and torsional rigidity, while the left and right suspensions primarily function as supports and vibration dampers. This suspension arrangement is only suitable for vehicles with relatively low torque, such as gasoline-powered cars. Compared to gasoline-powered cars, electric vehicles have higher torque. If the same arrangement is used, the torsional rigidity of the suspension assembly will be insufficient, leading to significant suspension displacement and a noticeable acceleration shock, greatly reducing ride comfort.

[0059] To address the aforementioned problems, this application provides a power drive system applied to an electric vehicle. (Refer to...) Figure 1 The power drive system includes a suspension assembly 1 and an electric drive assembly 2.

[0060] The suspension assembly 1 includes a first suspension 11, a second suspension 12 and a third suspension 13.

[0061] The first suspension 11, the second suspension 12, and the third suspension 13 each include a connecting structure 111. The first suspension 11, the second suspension 12, and the third suspension 13 are respectively connected to the electric drive assembly 2 through their respective connecting structures; and the first suspension 11, the second suspension 12, and the third suspension 13 are not located on the same straight line. That is, the first suspension 11, the second suspension 12, and the third suspension 13 roughly form a triangular region, and the electric drive assembly 2 connected to the three suspensions is at least partially located within the aforementioned triangular region.

[0062] The centers of the connecting structures of the first suspension 11, the second suspension 12, and the third suspension 13 are at approximately the same height as the center of gravity of the electric drive assembly 2. In other words, when the same reference plane (e.g., a horizontal plane) is used as a reference, the distances between the centers of the connecting structures of the first suspension 11, the second suspension 12, and the third suspension 13, and the center of gravity of the electric drive assembly 2, and the reference plane are equal.

[0063] It should be noted that, in order to improve the overall force balance of the suspension assembly, in this embodiment, the connection structure of the first suspension 11, the connection structure of the second suspension 12, and the connection structure of the third suspension 13 have the same structure.

[0064] Each mount is connected to the electric drive assembly via its own connecting structure. Therefore, the center of the connecting structure of each mount corresponds to the point of application of the force exerted by the electric drive assembly. Consequently, the position of the center of the connecting structure of each mount significantly affects the overall force distribution of the mount assembly. In this embodiment, the three mounts of the mount assembly are distributed on the three sides of the electric drive assembly, so that the electric drive assembly is at least partially located within the roughly triangular area enclosed by the three mounts. Furthermore, the center of the connecting structure of each of the three mounts is at approximately the same height as the center of gravity of the electric drive assembly. Based on the above arrangement, all three mounts of the mount assembly can function as anti-torsional limiters. As a result, the force distribution on the three mounts is more uniform during vehicle acceleration, resulting in superior driving comfort. Therefore, the power drive system provided in this embodiment is more suitable for electric vehicles.

[0065] Furthermore, the pendulum-style suspension arrangement in the prior art results in a relatively long suspension bracket design, leading to lower modal performance and often causing noise problems such as rumbling sounds inside the vehicle during acceleration. In contrast, the power drive system provided in this application embodiment has the three suspension connection structures at approximately the same center height, resulting in a more compact suspension assembly arrangement and improved overall modal performance.

[0066] It should be noted that modal characteristics are the inherent vibration characteristics of a structural system. The level of modal performance directly reflects the dynamic performance of the entire vehicle and also directly affects the NVH (Noise, Vibration, Harshness) performance of the entire vehicle.

[0067] In some embodiments, the center of gravity of the electric drive assembly 2 can approximately coincide with the centroid of the triangle formed by the centers of the connecting structures of the first suspension 11, the second suspension 12, and the third suspension 13. That is, the centroid of the triangle formed by the centers of the connecting structures of the three suspensions can completely coincide with the aforementioned centroid, or the centers of the connecting structures of the three suspensions can be located near the aforementioned centroid. Based on the aforementioned relative positional relationship between the centers of the connecting structures of the three suspensions and the center of gravity of the electric drive assembly, the torsional resistance of the three suspensions can be further improved, thereby further enhancing the vehicle's ride comfort.

[0068] For a surface, its centroid is the geometric center of the cross-section; for an object X in n-dimensional space, its centroid is the intersection of all hyperplanes that divide X into two equal parts, and is also the average of all points in X. In the embodiments of this application, the centroid of a triangle refers to the centroid of the triangle, that is, the intersection of the three medians of the triangle (the line connecting the vertex and the midpoint of the opposite side).

[0069] In some embodiments, by arranging three suspension positions, the triangle formed by the centers of the connection structures of the three suspensions is an isosceles triangle or an equilateral triangle. This allows for a more uniform distribution of stress on the suspension assembly, thereby fully utilizing the torsional resistance of the suspension.

[0070] Since the first suspension 11, the second suspension 12 and the third suspension 13 have the same connection structure, the connection structure of the second suspension 12 will be used as an example for the following explanation.

[0071] In some embodiments, such as Figure 3 As shown, the connection structure 111 may include a bushing 1111, a connection assembly 1112, and a buffer 1113. The buffer 1113 is fitted inside the bushing 1111 and connected to the outside of the connection assembly 1112, which is connected to the electric drive assembly 2. The bushing provides a fixing function for the buffer. Because the buffer is connected to the outside of the connection assembly, it can reduce the vibration and bumps generated by the electric drive assembly when the vehicle is driving on uneven road conditions, and limit and buffer the displacement of the electric drive assembly caused by sudden acceleration of the vehicle.

[0072] In some embodiments, the buffer 1113 may be made of rubber. For example... Figure 4As shown, there can be a deformation space X between the buffer 1113 and the connecting assembly 1112. That is, the buffer does not completely fill the space between the bushing and the connecting assembly. This gives the buffer good deformation capacity and a better shock absorption effect. Otherwise, the buffer will have high stiffness, poor deformation capacity, and poor shock absorption effect.

[0073] In some embodiments, such as Figure 5 As shown, bushing 1111 can be cylindrical, allowing the cushioning element and connecting assembly to fit into the hollow portion of the cylindrical bushing. Bushing 1111 can be made of plastic and manufactured by injection molding.

[0074] In some embodiments, such as Figure 3 and Figure 5 As shown, the connecting assembly 1112 may include a core 11121 and a connecting portion 11122. The core 11121 has a hollow structure, and the connecting portion 11122 is fitted inside the hollow structure. One end of the connecting portion 11122 is connected to the electric drive assembly 2. That is, the buffer 1113 is connected to the outside of the core 11121, and the connecting portion 11122 is fitted inside the core 11121. The buffer 1113, the core 11121, and the connecting portion 11112 are all located inside the bushing 1111.

[0075] For example Figure 3 and Figure 5 As shown, the connecting part 11122 can be rod-shaped, and the hollow structure of the core 11121 can be a through hole penetrating both ends of the core, so that the connecting part 11122 can pass through the hollow structure, one end can be fixed to the core, and the other end can be connected to the electric drive assembly. The connecting part 11122 can be a bolt.

[0076] It should be noted that when the connecting component of the connecting structure includes a connecting part and a core having the above-described structure, the center of the connecting structure refers to the center of the hollow structure of the core (i.e., the center of the through hole).

[0077] In some embodiments, the core 11121 can be made of an alloy material, such as aluminum alloy, which is lighter and has better strength and durability.

[0078] Taking a buffer material made of rubber as an example, this application provides a method for forming a buffer: placing the core inside the bushing and positioning the two according to actual needs, and then injecting vulcanized mortar into the space between the bushing and the core with the help of the molding and guiding action of the mold. When the vulcanized mortar is cured, a buffer is formed between the core and the bushing.

[0079] Furthermore, in order to ensure that the buffer does not completely fill the space between the bushing and the core, the vulcanizing slurry can be diverted using a mold, so that the vulcanizing slurry does not completely fill the space between the bushing and the core.

[0080] In some embodiments, such as Figure 5 As shown, the core 11121 can be in the shape of an elongated prism, such as a prism with a quadrilateral cross-section, and each side of the prism can be recessed inward. Based on the above structure of the core, when forming the buffer through the above vulcanization process, the vulcanized adhesive can more easily come into contact with the core through the mold, thereby achieving the connection between the buffer and the core.

[0081] like Figure 5 As shown, when the bushing is cylindrical, the buffer 1113 is also generally cylindrical. The buffer 1113 may have a flange, which covers the outer edge of the bushing when the buffer is fitted into the bushing, thereby providing protection.

[0082] In some embodiments, the connection structure of the first suspension 11, the second suspension 12 and the third suspension 13 can be directly constructed as part of the fixed components (such as the subframe) of the suspension assembly.

[0083] To improve the flexibility of suspension assembly replacement, the connection structures of each suspension are designed to be detachably fixed to the vehicle. For example... Figure 3 and Figure 5 As shown, the first suspension 11, the second suspension 12, and the third suspension 13 may each include a support housing 113. The support housing 113 may include a base portion 1131 and a fitting portion 1132 connected to each other. The connecting structure 111 is fitted into the fitting portion 1132. The first suspension 11, the second suspension 12, and the third suspension 13 are connected to the vehicle via their respective base portions 1131. Therefore, by fixing the connecting structure to the vehicle through the support housing, the connecting structure can be easily and flexibly replaced.

[0084] In some embodiments, such as Figure 5 As shown, the fitting part can be roughly cylindrical, with the connecting structure fitting into the hollow portion of the fitting part. The base part can be roughly triangular, and the base can be fixed at the three vertices of the triangle. Based on this, the stability of the fixation can be ensured while minimizing the footprint of the base part. The three vertices can be fixed to the vehicle, such as the subframe, using connecting bolts.

[0085] In some embodiments, the power drive system may further include a subframe 3. The first mount 11, the second mount 12, and the third mount 13 are connected to the subframe 3 via their respective base portions 1131. The subframe may also provide mounting points for the vehicle's suspension system, steering system, and the like.

[0086] After manufacturing the three mounting brackets, electric drive assembly, and subframe, the three mounting brackets and electric drive assembly can be fixed to the subframe, forming a modular whole. This modular whole can then be directly fixed to the vehicle body. Compared to assembling individual components one by one, this overall installation makes it easier to ensure the relative positional relationship between the three mounting brackets and the powertrain, and also results in higher assembly efficiency.

[0087] In some embodiments, the subframe integrating the aforementioned suspension assembly and electric drive assembly can be fixed to the vehicle body via multiple connecting bolts.

[0088] In some embodiments, such as Figure 6 As shown, the electric drive assembly 2 may also include a drive motor 21, a reducer 22, and a controller 23.

[0089] The drive motor 21 is the power source and achieves speed reduction and torque increase through the reducer 22. The reducer 22 is connected to the output terminal of the drive motor 21 to output the adjusted torque. The controller 23 is electrically connected to the drive motor 21 and is used to control the drive motor to work according to set parameters such as direction, speed, and angle. The drive motor 21, reducer 22, and controller 23 are located close to each other and integrated into one unit. In the prior art, the controller is usually far from the drive motor, resulting in a long wiring between them. Integrating the three into one unit can effectively shorten the wiring length between the drive motor and the controller, making the overall structure of the electric drive assembly more compact.

[0090] In some embodiments, the drive motor 21, the reducer 22, and the controller 23 can be integrated into a single housing. For example, the drive motor 21 and the controller 23 are integrated into the housing of the reducer 22.

[0091] In some embodiments, such as Figure 1 As shown, the power drive system may further include a first drive shaft 4 and a second drive shaft 5. The first drive shaft 4 and the second drive shaft 5 are connected to the power output end of the electric drive assembly 2. The output ends of the two drive shafts are respectively connected to the left and right wheels to transmit the torque of the drive motor to the two wheels, thereby driving the vehicle forward or backward.

[0092] In the above embodiments of this application, the centers of the three suspension connection structures are basically at the same height, which makes the structure of the suspension assembly more compact. The three suspensions and the electric drive assembly are fixed to the subframe to form a modular whole, which can be directly fixed to the vehicle body later. The controller, drive motor and reducer 22 are integrated into one to form the electric drive assembly, which can effectively shorten the wiring length and make the structure of the electric drive assembly more compact. Therefore, the power drive system provided by this application has a compact structure and a high degree of modularity. This can save space for accommodating other vehicle components and improve the utilization rate of the vehicle layout space; secondly, it can realize the modular assembly of the vehicle's power drive module and improve the vehicle's manufacturing and assembly efficiency; and thirdly, based on this platform architecture, it can realize the platform expansion of electric drive assemblies of different sizes and structural forms.

[0093] This application also provides a vehicle, which is an electric vehicle, such as an electric car, including the power drive system provided in any of the above embodiments. By providing this power drive system, the ride comfort of the vehicle can be improved.

[0094] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims. The above embodiments are merely illustrative, and the embodiments of this application are not limited to the embodiments listed above, but also include any combination of the different embodiments described above (without contradiction).

[0095] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

Claims

1. A power drive system, characterized in that, The power drive system is applied to an electric vehicle, and the power drive system includes a suspension assembly and an electric drive assembly; The suspension assembly includes a first suspension, a second suspension, and a third suspension; The first mount, the second mount, and the third mount each include a connecting structure. The first mount, the second mount, and the third mount are respectively connected to the electric drive assembly through their respective connecting structures, and the first mount, the second mount, and the third mount are not on the same straight line. The center of the first suspension connection structure, the center of the second suspension connection structure, the center of the third suspension connection structure, and the center of gravity of the electric drive assembly are at the same height; the center of the connection structure is the point of application of the force applied by the electric drive assembly. The first suspension connection structure, the second suspension connection structure, and the third suspension connection structure have the same structure; The connection structure includes a bushing, a connection assembly, and a buffer component; The buffer element is fitted inside the bushing and connected to the outside of the connecting assembly; there is a deformation space between the buffer element and the connecting assembly; The connection component is connected to the electric drive assembly; The connection component includes a core and a connection part; The core has a hollow structure, and the hollow structure of the core is a through hole that passes through both ends of the core; the connecting part is rod-shaped, and the connecting part passes through the hollow structure. One end of the connecting part is fixed to the core, and the other end is connected to the electric drive assembly; the center of the connecting structure is the center of the hollow structure of the core; the core is long prism-shaped, and each side of the core is concave inward; The buffer is formed by using a mold to guide the vulcanized slurry into the space between the bushing and the core, and after the vulcanized slurry has cured. The buffer does not completely fill the space between the bushing and the core. The buffer has a flange, which covers the outer edge of the bushing when the buffer is fitted inside the bushing. The electric drive assembly includes a drive motor, a reducer, and a controller, with the drive motor and the controller integrated inside the housing of the reducer.

2. The power drive system according to claim 1, characterized in that, The center of gravity of the electric drive assembly coincides with the centroid of the triangle formed by the center of the first suspension connection structure, the center of the second suspension connection structure, and the center of the third suspension connection structure.

3. The power drive system according to claim 1, characterized in that, The buffer is made of rubber.

4. The power drive system according to claim 1, characterized in that, The first suspension, the second suspension, and the third suspension all further include a supporting housing; The supporting housing includes a base portion and a fitting portion that are connected to each other; The connecting structure is fitted into the fitting portion; The first, second, and third suspensions are connected to the vehicle via their respective base portions.

5. The power drive system according to claim 4, characterized in that, The power drive system also includes a subframe; The first suspension, the second suspension, and the third suspension are connected to the subframe via their respective base portions.

6. The power drive system according to claim 1, characterized in that, The reducer is connected to the output end of the drive motor; The controller is electrically connected to the drive motor.

7. The power drive system according to claim 1, characterized in that, The power drive system also includes a first drive shaft and a second drive shaft; The first drive shaft and the second drive shaft are connected to the power output end of the electric drive assembly.

8. A vehicle, characterized in that, The vehicle is an electric vehicle, including the power drive system as described in any one of claims 1 to 7.

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