Multi-stage compression electronic supercharger and vehicle

Abstract

The invention discloses a multi-stage compression electronic supercharger and a vehicle, and relates to the technical field of superchargers, the multi-stage compression electronic supercharger comprises a plurality of compression cavities which are sequentially arranged in the first direction and are sequentially communicated in series, an air inlet and an air outlet are further formed in a compression body, and the air inlet and the air outlet are communicated in the first direction; the two compression cavities located at the ends communicate with the air inlet and the air outlet correspondingly, at least one pressurizing impeller is arranged in each compression cavity, the electric driving structure is in transmission connection with the multiple pressurizing impellers, and the electric driving structure is configured to drive the multiple pressurizing impellers to synchronously rotate around the rotating axis extending in the first direction. And therefore, the pressurizing impellers compress the gas in the corresponding compression cavities. Through staged compression of the multiple compression cavities and the multiple supercharging impellers, the pressure can be rapidly increased to the target supercharging pressure, the hysteresis phenomenon of a traditional turbocharger is almost eliminated, instant accelerator response of a large-displacement naturally aspirated engine is achieved, and then the fuel economy of a vehicle can be improved.

Description

Technical Field

[0001] This invention relates to the field of turbocharger technology, and in particular to a multi-stage compression electronic turbocharger and a vehicle. Background Technology

[0002] In related technologies, exhaust gas turbocharging converts exhaust gas energy into the mechanical energy of the turbocharger. By compressing air, more fresh air is introduced into the engine cylinders, allowing for more fuel to be burned in a fixed cylinder working volume, thereby improving engine power, fuel economy, and emissions. However, turbochargers experience transient torque lag (turbo lag) at low speeds. When operating under transient conditions, the turbocharger's operating characteristics tend to result in a long intake pressure response time, and gas inertia increases pumping losses, leading to poorer fuel economy and slower torque response. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this invention is to provide a multi-stage compression electronic supercharger that can efficiently boost pressure, reduce compression losses, and rapidly increase pressure to the target boost pressure, achieving instant boost in the low-speed range, virtually eliminating the lag phenomenon of traditional turbochargers, realizing instant throttle response in large-displacement naturally aspirated engines, and thus improving vehicle fuel economy.

[0004] The present invention further proposes a vehicle having the above-mentioned multi-stage compression electronic supercharger.

[0005] A multi-stage compression electronic booster according to an embodiment of the present invention includes: The compression body has multiple compression chambers formed within it. The multiple compression chambers are arranged sequentially along a first direction and connected in series. The compression body also has an air inlet and an air outlet. Along the first direction, two compression chambers located at the ends are connected to the air inlet and the air outlet, respectively. Multiple booster impellers, with at least one booster impeller installed in each compression chamber; An electric drive structure is connected to multiple booster impellers. The electric drive structure is configured to drive the multiple booster impellers to rotate synchronously around a rotation axis extending in a first direction, so that the booster impellers compress the gas in the corresponding compression chamber.

[0006] According to an embodiment of the present invention, a multi-stage compression electronic supercharger has multiple compression chambers formed within a compression body. These chambers are arranged sequentially along a first direction and connected in series. Each compression chamber contains at least one supercharger impeller. An electric drive structure is driven to drive the multiple supercharger impellers to rotate synchronously around a rotation axis extending along the first direction. This causes the supercharger impellers to compress the gas in the corresponding compression chamber. The gas is compressed sequentially through each stage of the supercharger impellers, with each stage performing work on the gas, gradually increasing the pressure. This achieves efficient supercharging, reduces compression losses, and rapidly raises the pressure to the target boost pressure. It provides instant supercharging in the low-speed range, almost eliminating the lag phenomenon of traditional turbochargers. This enables instant throttle response for large-displacement naturally aspirated engines, thereby improving vehicle fuel economy.

[0007] According to some embodiments of the present invention, the compression body further has multiple connection ports, which are connected to multiple compression cavities in a one-to-one correspondence, and any two adjacent compression cavities are connected through the corresponding two connection ports.

[0008] According to some embodiments of the present invention, the multi-stage compression electronic booster further includes a connecting pipe, through which two connection ports corresponding to two adjacent compression chambers are connected.

[0009] According to some embodiments of the present invention, the plurality of compression chambers include a primary compression chamber and a secondary compression chamber, and the plurality of connection ports include a primary pressure end outlet and a secondary pressure end inlet. The primary pressure end outlet is connected to the primary compression chamber, the secondary pressure end inlet is connected to the secondary compression chamber, and the primary compression chamber and the secondary compression chamber are connected to the air inlet and the air outlet, respectively.

[0010] According to some embodiments of the present invention, the extension direction of the central axis of the connector forms an angle with the first direction.

[0011] According to some embodiments of the present invention, the extension direction of the central axis of at least one connection port is perpendicular to the first direction.

[0012] According to some embodiments of the present invention, the air inlet and the electric drive structure are arranged at intervals along a first direction, and a plurality of compression chambers are located between the air inlet and the electric drive structure.

[0013] In some embodiments of the present invention, multiple booster impellers have the same structure.

[0014] According to some embodiments of the present invention, the electric drive structure is a drive motor, the drive motor has a drive shaft that extends along a first direction, the drive shaft extends into a plurality of compression chambers, and a plurality of booster impellers are fixed to the drive shaft.

[0015] A vehicle according to an embodiment of the present invention includes: engine; The multi-stage compression electronic supercharger is the same as the multi-stage compression electronic supercharger described in the above embodiment, with its outlet connected to the engine's intake manifold.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a cross-sectional view of a multi-stage compression electronic supercharger according to an embodiment of the present invention; Figure 2 This is a side view of a multi-stage compression electronic supercharger according to an embodiment of the present invention.

[0018] Figure label: Multi-stage compression electronic supercharger 100; Compression body 10; Compression chamber 11; Air inlet 12; Air outlet 13; Booster impeller 14; Connection port 15; Connecting pipe 16; Primary compression chamber 17; Primary pressure end outlet 171; Secondary compression chamber 18; Secondary pressure end inlet 181; Electric drive structure 20; drive motor 21; drive shaft 22; floating bearing 23; thrust bearing 24. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is for reference. Figures 1-2 A multi-stage compression electronic supercharger 100 and a vehicle are described according to embodiments of the present invention.

[0021] A multi-stage compression electronic booster 100 according to an embodiment of the present invention includes: The compression body 10 has multiple compression chambers 11 formed inside it. The multiple compression chambers 11 are arranged in sequence along the first direction and connected in series. The compression body 10 also has an air inlet 12 and an air outlet 13. Along the first direction, the two compression chambers 11 located at the ends are connected to the air inlet 12 and the air outlet 13 respectively. Multiple booster impellers 14, with at least one booster impeller 14 provided in each compression chamber 11; The electric drive structure 20 is connected to multiple booster impellers 14. The electric drive structure 20 is configured to drive the multiple booster impellers 14 to rotate synchronously around a rotation axis extending in a first direction, so that the booster impellers 14 compress the gas in the corresponding compression chamber 11.

[0022] Among them, such as Figure 1 As shown, the X direction is the first direction. Multiple compression cavities 11 are formed inside the compression body 10. In some embodiments of the present invention, two, three, four or other numbers of compression cavities 11 can be formed inside the compression body 10. However, the present invention is not limited to this. Other numbers of compression cavities 11 can also be formed inside the compression body 10, as long as multiple compression cavities 11 are formed inside the compression body 10.

[0023] Multiple compression chambers 11 are arranged sequentially along the first direction and connected in series. The compression body 10 also forms an air inlet 12 and an air outlet 13. Along the first direction, the two compression chambers 11 located at the ends are connected to the air inlet 12 and the air outlet 13 respectively, so that the gas can enter the multiple compression chambers 11 from the air inlet 12, be compressed in stages, and then be discharged from the air outlet 13. Multi-stage compression distributes the total compression ratio to multiple stages. The compression ratio of each stage is reduced, which greatly reduces the compression resistance and reduces the load of each stage compressor. This helps to improve the gas compression efficiency and reliability, avoids excessively high single-stage compression ratio and gas density surge, which would cause waste, and can also significantly improve the low-pressure exhaust gas recirculation and introduction capability of the engine at low speed and high load, thus achieving an effective improvement in thermal efficiency.

[0024] A multi-stage compression electronic booster 100 includes multiple booster impellers 14. In some embodiments of the present invention, the multi-stage compression electronic booster 100 may include two, three, four, or other numbers of booster impellers 14. However, the present invention is not limited to this, and the multi-stage compression electronic booster 100 may also include other numbers of booster impellers 14, as long as the multi-stage compression electronic booster 100 includes multiple booster impellers 14. Each compression chamber 11 is provided with at least one booster impeller 14. In some embodiments of the present invention, each compression chamber 11 may have one, two, three, or other numbers of booster impellers 14. However, the present invention is not limited to this, and each compression chamber 11 may also have other numbers of booster impellers 14, as long as each compression chamber 11 has at least one booster impeller 14. The booster impeller 14 is the core component of the compressor. When gas enters the compression chamber 11, it rotates at high speed under the drive of the booster impeller 14, gradually increasing the gas pressure to meet the boosting requirements.

[0025] The electric drive structure 20 can be a motor, reducer, etc. It is connected to multiple booster impellers 14. The electric drive structure 20 is configured to drive the multiple booster impellers 14 to rotate synchronously around a rotation axis extending in a first direction. Gas is compressed sequentially through each stage of the booster impellers 14. Each stage of the booster impeller 14 performs work on the gas, gradually increasing the gas pressure. This allows the booster impeller 14 to compress the gas in its corresponding compression chamber 11, achieving efficient boost and rapidly raising the pressure to the target boost pressure. This provides instant boost in the low-speed range, almost eliminating the hysteresis of traditional turbochargers and achieving instant throttle response in large-displacement naturally aspirated engines, thereby improving vehicle fuel economy. Furthermore, the electric drive structure 20 synchronously drives multiple booster impellers 14, and the vibration frequencies and phases generated by each booster impeller 14 are consistent and cancel each other out, thus reducing the overall vibration level of the equipment and improving the operational stability and reliability of the multi-stage compression electronic supercharger 100.

[0026] According to an embodiment of the present invention, a multi-stage compression electronic supercharger 100 has multiple compression chambers 11 formed within a compression body 10. The multiple compression chambers 11 are arranged sequentially along a first direction and connected in series. Each compression chamber 11 is provided with at least one supercharger impeller 14. An electric drive structure 20 is drivenly connected to the multiple supercharger impellers 14. The electric drive structure 20 is configured to drive the multiple supercharger impellers 14 to rotate synchronously around a rotation axis extending along the first direction, so that the supercharger impellers 14 compress the gas in the corresponding compression chamber 11. The gas can be compressed sequentially through each stage of supercharger impellers 14. Each stage of supercharger impeller 14 does work on the gas, so that the pressure gradually increases. This can efficiently boost the pressure, reduce compression loss, and quickly raise the pressure to the target boost pressure. It can provide instant boost in the low-speed range, almost eliminating the lag phenomenon of traditional turbochargers, realizing instant throttle response of large-displacement naturally aspirated engines, and thus improving the fuel economy of the vehicle.

[0027] According to some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the compression body 10 also has multiple connection ports 15, which are connected to multiple compression chambers 11 in a one-to-one correspondence. Any two adjacent compression chambers 11 are connected through the corresponding two connection ports 15.

[0028] The compression body 10 also has multiple connection ports 15. In some embodiments of the present invention, the compression body 10 may have two, three, four, or other numbers of connection ports 15, but the present invention is not limited to this. The compression body 10 may also have other numbers of connection ports 15, as long as the compression body 10 has multiple connection ports 15. The number of connection ports 15 is consistent with the number of compression chambers 11. The multiple connection ports 15 are connected to the multiple compression chambers 11 in a one-to-one correspondence. Any two adjacent compression chambers 11 are connected through two corresponding connection ports 15, so that each compression chamber 11 receives gas through an independent connection port 15. After the gas is compressed stage by stage, it is transferred to the next stage compression chamber 17 through adjacent connection ports 15. This can avoid the efficiency loss caused by the large pressure span during single-stage compression, improve the compression efficiency, and achieve efficient staged compression. The one-to-one correspondence design between the connection ports 15 and the compression chambers 11 also shortens the gas flow path and reduces the pressure loss and leakage risk caused by long-distance transmission.

[0029] According to some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the multi-stage compression electronic booster 100 also includes a connecting pipe 16, through which two connection ports 15 corresponding to two adjacent compression chambers 11 are connected.

[0030] The two connection ports 15 corresponding to the two adjacent compression chambers 11 are connected by a connecting pipe 16, which is equivalent to forming a cooling channel between the two adjacent compression chambers 11. This reduces the temperature of the compressed gas, prevents the temperature of the compressed gas from rising cumulatively, which is beneficial to improving compression efficiency and also prevents the exhaust temperature from being too high. The size of the connecting pipe 16 can be dynamically adjusted according to the pressure difference between the adjacent compression chambers 11, ensuring that the gas maintains the optimal flow rate during the compression process, achieving balanced compression pressure at each stage, and enhancing system stability.

[0031] According to some embodiments of the present invention, such as Figure 1 As shown, the multiple compression chambers 11 include a primary compression chamber 17 and a secondary compression chamber 18, and the multiple connection ports 15 include a primary pressure end outlet 171 and a secondary pressure end inlet 181. The primary pressure end outlet 171 is connected to the primary compression chamber 17, and the secondary pressure end inlet 181 is connected to the secondary compression chamber 18. The primary compression chamber 17 and the secondary compression chamber 18 are connected to the air inlet 12 and the air outlet 13, respectively.

[0032] The first-stage compression chamber 17 is responsible for initially compressing the gas entering through the intake port 12 to an intermediate pressure. The second-stage compression chamber 18 further compresses the intermediate-pressure gas to the target high-pressure gas and then discharges it to the engine through the outlet port 13. This allows the compression ratio of each stage of the compression chamber 11 to be more reasonable, avoiding the efficiency loss caused by excessive compression ratio during single-stage compression. Staged compression also reduces the gas overheating phenomenon during single-stage compression, making the compression process closer to isothermal compression.

[0033] By setting up a primary compression chamber 17 and a secondary compression chamber 18 to compress the gas in stages, the pressure can be quickly increased to the target boost pressure, providing instant boost in the low speed range. This almost eliminates the lag phenomenon of traditional turbochargers, enabling instant throttle response of large-displacement naturally aspirated engines, thereby improving the vehicle's fuel economy.

[0034] According to some embodiments of the present invention, the extension direction of the central axis of the connection port 15 forms an angle with the first direction.

[0035] The extension direction of the central axis of the connection port 15 forms an angle with the first direction, which facilitates the connection of the connecting pipe 16 between two adjacent connection ports 15 and can also shorten the length of the connecting pipe 16. This is beneficial to the compact design of the multi-stage compression electronic supercharger 100, thereby reducing the volume of the multi-stage compression electronic supercharger 100 and reducing the space occupied by the multi-stage compression electronic supercharger 100 in the vehicle.

[0036] Furthermore, the extension direction of the central axis of the connection port 15 forms an angle with the first direction, allowing gas to be discharged radially along the compression chamber 11 and flow radially into the next stage compression chamber 17. This enables the gas to be more evenly distributed around the booster impeller 14 when entering the compression chamber 11, helping to reduce airflow unevenness at the inlet of the booster impeller 14, reducing vibration and noise of the booster impeller 14, and improving the work capacity of the booster impeller 14. At the same time, the angle between the extension direction of the central axis of the connection port 15 and the first direction also helps to achieve uniform exhaust from the compression chamber 11. When the gas leaves the compression chamber 11, it can flow into the next stage or be discharged outside the compression body 10 in a more stable manner, reducing pressure fluctuations and airflow turbulence during the exhaust process, which helps to improve the exhaust stability of the multi-stage compression electronic booster 100 and reduce exhaust noise.

[0037] Furthermore, the multi-stage compression electronic supercharger 100 of the present invention adopts a radial flow compressor, with airflow entering axially from the compression chamber 11 and exiting radially. Its overall structure is cylindrical with a short axial dimension. Compared to axial flow compressors (where airflow flows axially and requires multiple stages in series), it is smaller and lighter at the same flow rate and pressure, reducing the space occupied by the multi-stage compression electronic supercharger 100 and lowering manufacturing costs. Moreover, compared to axial flow compressors, the inlet 12 and outlet 13 of the radial flow compressor have relatively smaller cross-sectional areas, resulting in less modification to the multi-stage compression electronic supercharger 100 when connecting it to the intake system, thus reducing the overall vehicle assembly complexity.

[0038] According to some embodiments of the present invention, the extension direction of the central axis of at least one connection port 15 is perpendicular to the first direction.

[0039] In this invention, at least one connection port 15 has its central axis extending in a direction perpendicular to the first direction. In some embodiments of the invention, one or two equal numbers of connection ports 15 may have their central axes extending in a direction perpendicular to the first direction. However, the invention is not limited to this, and other numbers of connection ports 15 may have their central axes extending in a direction perpendicular to the first direction, as long as at least one connection port 15 has its central axis extending in a direction perpendicular to the first direction.

[0040] As a specific embodiment of the present invention, the extension direction of the central axis of the connection port 15 of the secondary compression chamber 18 is perpendicular to the first direction. This facilitates the compact design of the multi-stage compression electronic supercharger 100, reducing its volume and thus minimizing its space occupation within the vehicle. It also helps prevent gas backflow within the compression chamber 11, which causes repeated gas circulation, increasing energy consumption and reducing compression efficiency. The vertical connection port 15 design effectively prevents gas backflow by ensuring unidirectional gas flow.

[0041] According to some embodiments of the present invention, such as Figure 1 As shown, the air inlet 12 and the electric drive structure 20 are arranged at intervals along the first direction, and a plurality of compression chambers 11 are located between the air inlet 12 and the electric drive structure 20.

[0042] Among them, the electric drive structure 20 may cause airflow boundary layer separation due to surface roughness or local protrusions, increasing flow resistance. The air inlet 12 and the electric drive structure 20 are arranged at intervals to avoid direct interference of the electric drive structure 20 (such as motor and reducer) to the airflow, which can effectively improve the overall compression efficiency of the multi-stage compression electronic supercharger 100.

[0043] Multiple compression chambers 11 are located between the air inlet 12 and the electric drive structure 20, forming a staged compression structure. Each stage of compression chamber 11 can be optimized for a specific pressure range, gradually increasing the gas pressure and reducing the efficiency loss caused by excessive single-stage compression ratio.

[0044] In some embodiments of the present invention, the multiple supercharger impellers 14 may have identical structures. When rotating, these identical impellers 14 have consistent blade shape, angle, and spacing, ensuring uniform airflow distribution within the impeller 14 and reducing turbulence and separation between them, thereby improving boosting efficiency. This also helps reduce pressure pulsation in the multi-stage compression electronic supercharger 100, improving the stability of engine intake pressure and thus enhancing combustion efficiency.

[0045] The identical booster impellers 14 can be modularly designed and manufactured using the same molds, processes, and materials, simplifying the design process and reducing the costs of design changes and verification. Modular design also facilitates subsequent maintenance and upgrades. Furthermore, the identical booster impellers 14 can be mass-produced to reduce costs, improve production efficiency, and shorten production cycles, thus enabling a faster response to market demands.

[0046] According to some embodiments of the present invention, the electric drive structure 20 is a drive motor 21, the drive motor 21 has a drive shaft 22, the drive shaft 22 extends along a first direction, the drive shaft 22 extends into a plurality of compression chambers 11, and a plurality of booster impellers 14 are fixed to the drive shaft 22.

[0047] The drive shaft 22 extends along a first direction and extends into multiple compression chambers 11. Multiple booster impellers 14 are fixed to the drive shaft 22. When the drive shaft 22 rotates around its rotation axis extending in the first direction, it drives the multiple booster impellers 14 to rotate synchronously to compress gas. The drive motor 21 directly drives the drive shaft 22 to rotate, eliminating the need to wait for engine exhaust energy accumulation or mechanical transmission response. The drive motor 21 starts immediately and reaches the target speed the moment the driver presses the accelerator, almost eliminating the "turbo lag" phenomenon of traditional turbochargers and providing more linear power output. At low engine speeds, insufficient exhaust energy leads to low efficiency in traditional turbochargers. The electronic supercharger can supplement the boost pressure through the drive motor 21, significantly improving low-speed torque. The multi-stage compression electronic supercharger 100 of this invention can achieve faster boost. Simultaneously, the two-stage compression through the primary compression chamber 17 and the secondary compression chamber 18 shares the overall boost ratio, reducing the load on each compressor stage and helping to improve the efficiency and reliability of gas compression.

[0048] The multi-stage compression electronic supercharger 100 can significantly improve the low-pressure exhaust gas recirculation and introduction capability of the engine at low speed and high load, thereby improving the effective thermal efficiency. It also significantly improves the pressure rise rate during the engine's boosting phase, thereby improving the engine's steady-state and transient performance.

[0049] Furthermore, the drive motor 21 also includes a floating bearing 23 and a thrust bearing 24. The floating bearing 23 is used to bear the radial and axial loads of the drive shaft 22, compensate for thermal expansion, and eliminate thermal stress. The floating bearing 23 has extremely high speed adaptability, high temperature resistance, good vibration and noise reduction characteristics, high reliability, compact structure, and relatively low cost, which can meet the working requirements of the multi-stage compression electronic supercharger 100. The thrust bearing 24 is used to bear the axial load of the drive shaft 22, precisely defining the axial position of the drive shaft 22, preventing axial movement of the drive shaft 22, and thus ensuring the stable operation of the multi-stage compression electronic supercharger 100.

[0050] A vehicle according to an embodiment of the present invention includes: engine; The multi-stage compression electronic supercharger 100 is the same as the multi-stage compression electronic supercharger 100 described in the above embodiment, and its outlet 13 is connected to the intake manifold of the engine.

[0051] Among them, the exhaust port 13 is connected to the intake manifold of the engine to directly send the gas compressed in stages by the multi-stage compression electronic supercharger 100 into the combustion chamber of the engine, shortening the transmission path of the supercharged gas, making the engine respond more quickly to changes in throttle, almost eliminating the "turbo lag" phenomenon of traditional turbochargers, and improving low-speed torque and acceleration performance.

[0052] By forming multiple compression chambers 11 within the compression body 10, the multiple compression chambers 11 are arranged sequentially along a first direction and connected in series. Each compression chamber 11 is provided with at least one booster impeller 14. The electric drive structure 20 is drivenly connected to the multiple booster impellers 14. The electric drive structure 20 is configured to drive the multiple booster impellers 14 to rotate synchronously around a rotation axis extending along the first direction, so that the booster impellers 14 compress the gas in the corresponding compression chamber 11. The gas can be compressed sequentially through each stage of booster impellers 14. Each stage of booster impellers 14 does work on the gas, so that the pressure gradually increases. This can efficiently boost the pressure, reduce compression loss, and quickly raise the pressure to the target boost pressure. It can provide instant boost in the low speed range, almost eliminating the lag phenomenon of traditional turbochargers, realizing instant throttle response of large displacement naturally aspirated engines, and thus improving the fuel economy of the vehicle.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-stage compression electronic booster, characterized in that, include: The compression body has multiple compression chambers formed within it. The multiple compression chambers are arranged sequentially along a first direction and connected in series. The compression body also has an air inlet and an air outlet. Along the first direction, two compression chambers located at the ends are respectively connected to the air inlet and the air outlet. Multiple booster impellers, with at least one booster impeller provided in each of the compression chambers; An electric drive structure is provided, wherein the electric drive structure is connected to a plurality of the booster impellers in a driving connection, and the electric drive structure is configured to drive the plurality of booster impellers to rotate synchronously about a rotation axis extending along the first direction, so that the booster impellers compress the gas in the corresponding compression chamber.

2. The multi-stage compression electronic booster according to claim 1, characterized in that, The compression body also has multiple connection ports, which are connected to multiple compression cavities one by one, and any two adjacent compression cavities are connected through the corresponding two connection ports.

3. The multi-stage compression electronic booster according to claim 2, characterized in that, The multi-stage compression electronic booster further includes a connecting pipe, through which two connection ports corresponding to two adjacent compression chambers are connected.

4. The multi-stage compression electronic booster according to claim 2, characterized in that, The plurality of compression chambers include a primary compression chamber and a secondary compression chamber, and the plurality of connection ports include a primary pressure end outlet and a secondary pressure end inlet. The primary pressure end outlet is connected to the primary compression chamber, the secondary pressure end inlet is connected to the secondary compression chamber, and the primary compression chamber and the secondary compression chamber are respectively connected to the air inlet and the air outlet.

5. The multi-stage compression electronic booster according to claim 2, characterized in that, The extension direction of the central axis of the connection port forms an angle with the first direction.

6. The multi-stage compression electronic booster according to claim 5, characterized in that, The central axis of at least one of the connectors extends in a direction perpendicular to the first direction.

7. The multi-stage compression electronic booster according to claim 1, characterized in that, The air inlet and the electric drive structure are arranged at intervals along the first direction, and the plurality of compression chambers are located between the air inlet and the electric drive structure.

8. The multi-stage compression electronic booster according to claim 1, characterized in that, The multiple booster impellers have the same structure.

9. The multi-stage compression electronic booster according to any one of claims 1-8, characterized in that, The electric drive structure is a drive motor, which has a drive shaft that extends along the first direction and extends into multiple compression chambers. Multiple booster impellers are fixed to the drive shaft.

10. A vehicle, characterized in that, include: engine; A multi-stage compression electronic supercharger, wherein the multi-stage compression electronic supercharger is the same as any one of claims 1-9, and the outlet is connected to the intake manifold of the engine.

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