Integrated range extender assembly and range-extended new energy vehicle

Abstract

The utility model discloses an integrated type range extender assembly and a range extending type new energy vehicle, and relates to the technical field of vehicles, the integrated type range extender assembly comprises an integrated cylinder body, a motor assembly and an end cover, a crankshaft is arranged in the integrated cylinder body, and a motor shell with a backward opening is integrally arranged at the rear end of the integrated cylinder body; the motor assembly comprises a motor stator and a motor rotor, the motor stator is fixedly arranged in the motor shell, and the motor rotor is rotatably arranged in the center of the motor stator, detachably connected with the crankshaft and used for being driven by the crankshaft to rotate; and the end cover detachably covers the opening at the rear end of the motor shell in a sealing manner. Compared with the prior art, the range extender has the advantages that the motor shell is integrally integrated at the rear end of the integrated cylinder body, the integration level of the range extender can be improved, the structure is simple and compact, and miniaturization and light weight of the range extender can be achieved. And the assembling efficiency is higher, the production and manufacturing are simpler, and the cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and more specifically, to an integrated range extender assembly and a range-extended new energy vehicle. Background Technology

[0002] Currently, all automakers are developing range-extended electric vehicle models, especially pure electric vehicles. Range-extended electric vehicles have high market acceptance and demand. The advantages of range-extended electric vehicles are that they can reduce the cost of purchasing a car for users and solve the problems of long-distance range anxiety and charging difficulties. In the future, new energy vehicles will adopt a large number of range extenders + small fuel tanks + large batteries. Against this background, the market demand for range extenders will continue to increase. However, opportunities and challenges coexist. The technology of range extenders from various companies will be advancing rapidly, and the cost will become increasingly competitive.

[0003] Existing range extenders employ a separate design approach, with the generator housing, stator, and controller bolted to the engine and sealed with gaskets. This low level of integration results in a less compact structure, larger overall axial dimensions, and greater size and weight, hindering miniaturization. Furthermore, current range extenders require the engine and generator to be manufactured at different factories and then transported to the same factory for assembly. Separate production lines lead to high manufacturing and transportation costs and low assembly efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated range extender assembly and a range-extended new energy vehicle, which can improve the integration of the range extender, has a simple and compact structure, is conducive to miniaturization and lightweighting, and has high assembly efficiency, simple manufacturing and lower cost.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In one aspect, this utility model embodiment provides an integrated range extender assembly, comprising:

[0007] An integrated cylinder block is provided, in which a crankshaft is installed, and at the rear end of the integrated cylinder block, a motor housing with an opening facing rearward is integrally provided;

[0008] The motor assembly includes a motor stator and a motor rotor. The motor stator is fixedly installed inside the motor housing, and the motor rotor is rotatably installed at the center of the motor stator and detachably connected to the crankshaft for rotating under the drive of the crankshaft.

[0009] End cap, which is detachably sealed to the rear opening of the motor housing.

[0010] In an optional embodiment, the integrated cylinder block includes a cylinder head, a cylinder barrel, a crankshaft housing, and an oil pan. The cylinder barrel is integrally disposed on the top of the crankshaft housing, the cylinder head is disposed on the cylinder barrel, the oil pan is detachably disposed on the bottom of the crankshaft housing and spliced ​​with the crankshaft housing to form a crankshaft cavity, the crankshaft is rotatably disposed in the crankshaft cavity, and the motor housing is integrally disposed on the rear end of the crankshaft housing and / or the oil pan.

[0011] In an optional embodiment, the motor housing includes an upper housing and a lower housing. The upper housing is integrally disposed at the rear end of the crankshaft housing, and the lower housing is integrally disposed at the rear end of the oil pan. The upper housing and the lower housing are spliced ​​together to form a motor cavity, and the motor stator and the motor rotor are disposed inside the motor cavity.

[0012] In an optional embodiment, the lower housing is provided with an oil sump, and the end cover is also provided with an oil pump assembly. The end cover is also provided with an oil cooling channel. One end of the oil cooling channel extends to the motor assembly, and the other end extends to the oil sump. The oil pump assembly is connected to the oil cooling channel and is used to pump the cooling oil in the oil sump to the motor assembly through the oil cooling channel.

[0013] In an optional embodiment, an oil cooler is also provided on the side of the end cap away from the integrated cylinder body. The oil cooler is connected to the oil cooling channel and is used to dissipate heat from the cooling oil pumped to the motor assembly.

[0014] In an optional embodiment, a sealing ring is provided at the rear end opening of the motor housing, and the end cover is pressed onto the sealing ring and detachably connected to the motor housing so that the end cover and the motor housing are sealed together.

[0015] In an optional embodiment, the rear end of the integrated cylinder block is further provided with multiple stator mounting seats, which are housed within the motor housing, and the motor stator is detachably mounted on the multiple stator mounting seats.

[0016] In an optional embodiment, the rear end of the crankshaft extends into the motor housing and is provided with a fixing plate, which is spaced apart from the stator mounting base, and the motor rotor is detachably connected to the fixing plate.

[0017] In an optional implementation, the integrated range extender assembly also includes a controller, which is detachably disposed on the side of the end cover away from the integrated cylinder and electrically connected to the motor assembly. A position sensor is disposed in the integrated cylinder and is communicatively connected to the controller. The position sensor is used to monitor the movement position of the crankshaft and transmit the crankshaft position information to the controller.

[0018] A range-extended new energy vehicle, including the aforementioned integrated range extender assembly.

[0019] The beneficial effects of this utility model embodiment are:

[0020] The integrated range extender assembly provided in this embodiment of the invention features a crankshaft housed within an integrated cylinder body. A rear-opening motor housing is integrally formed at the rear end of the integrated cylinder body. The motor stator is fixed within the motor housing, and the motor rotor is rotatably positioned at the center of the motor stator and detachably connected to the crankshaft, allowing it to rotate under the crankshaft's drive. An end cover is detachably fitted onto the rear opening of the motor housing. Compared to existing technologies, the integrated range extender assembly provided in this embodiment of the invention integrates the motor housing integrally with the rear end of the integrated cylinder body, improving the integration of the range extender. Furthermore, it eliminates the need for bolts to secure the motor housing, resulting in a simple and compact structure, reduced axial dimensions, and facilitating miniaturization and weight reduction of the range extender. Moreover, the assembly process for the motor housing is eliminated during assembly, leading to higher assembly efficiency. Production can be carried out on a single production line, simplifying manufacturing and reducing costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 An exploded view of the integrated range extender provided in an embodiment of this utility model;

[0023] Figure 2 for Figure 1 Exploded view of the integrated cylinder block;

[0024] Figure 3 for Figure 1 A schematic diagram of the middle crankshaft housing from a first-view perspective;

[0025] Figure 4 for Figure 1 A schematic diagram of the middle crankshaft housing from a second perspective;

[0026] Figure 5 A partial structural cross-sectional view of the integrated range extender provided in an embodiment of this utility model.

[0027] icon:

[0028] 100-Integrated range extender assembly; 110-Integrated cylinder block; 111-Crankshaft; 112-Cylinder head; 113-Cylinder barrel; 114-Crankshaft housing; 115-Oil pan; 116-Stator mounting base; 117-Fixed plate; 120-Motor housing; 121-Upper housing; 122-Lower housing; 123-Oil sump; 124-Flange ring; 130-Motor assembly; 131-Motor stator; 132-Motor rotor; 140-End cover; 141-Oil cooling channel; 142-Sealing ring; 150-Reinforcing rib; 160-Oil pump assembly; 161-Oil cooler; 170-Controller; 171-Three-phase adapter. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] As disclosed in the background section, existing range extenders typically mount the generator rotor to the engine crankshaft, with the generator housing, stator, and controller components bolted to the engine housing. A gasket seals the connection between the generator housing and the engine. This structure involves separate manufacturing and assembly of the generator and engine, resulting in low integration. Furthermore, existing range extenders have large axial dimensions and are heavy. For example, a certain type of split-type range extender typically has an axial dimension exceeding 692.4 mm and a weight exceeding 116 kg. While the weight is already relatively light, it still lacks a competitive edge. Currently, there is an increasing demand for lightweight range extenders, as this can contribute to improved fuel economy in vehicle models.

[0036] Furthermore, existing range extenders typically have their engines and electric motors manufactured by different companies, or even at different locations or production lines within the same company. This results in high manufacturing costs and significant assembly and transportation expenses. Additionally, the cumbersome assembly process leads to low assembly efficiency.

[0037] To address the aforementioned problems, this utility model provides a novel integrated range extender assembly and a range-extended new energy vehicle. The specific structure and working principle of the range extender assembly will be described in detail below.

[0038] See Figures 1 to 3 This utility model provides an integrated range extender assembly 100, which can improve the integration of the range extender, has a simple and compact structure, is conducive to the miniaturization and weight reduction of the range extender, and has high assembly efficiency, simple manufacturing and lower cost.

[0039] The integrated range extender assembly 100 provided in this embodiment of the utility model includes an integrated cylinder 110, a motor assembly 130, and an end cover 140. A crankshaft 111 is disposed inside the integrated cylinder 110, and a rear-opening motor housing 120 is integrally disposed at the rear end of the integrated cylinder 110. The motor assembly 130 includes a motor stator 131 and a motor rotor 132. The motor stator 131 is fixedly disposed inside the motor housing 120, and the motor rotor 132 is rotatably disposed at the center of the motor stator 131 and detachably connected to the crankshaft 111 for rotating under the drive of the crankshaft 111. The end cover 140 is detachably sealed and covered at the rear opening of the motor housing 120.

[0040] It should be noted that the motor housing 120 and the integrated cylinder body 110 are integrally formed, and both the motor stator 131 and the motor rotor 132 are housed within the motor housing 120. The end cover 140 seals and covers the motor housing 120, thus sealing and accommodating both the motor stator 131 and the motor rotor 132 within it. Integrating the motor housing 120 integrally into the rear end of the integrated cylinder body 110 improves the integration of the range extender and eliminates the need for bolts to fix the motor housing 120. This results in a simple and compact structure, reduced axial dimensions, and facilitates the miniaturization and weight reduction of the range extender. Furthermore, the motor stator 131 and the motor rotor 132 can be directly installed during assembly, eliminating the assembly process of the motor housing 120, resulting in higher assembly efficiency. Production can be carried out on a single production line, simplifying manufacturing and reducing costs.

[0041] In some embodiments, the outer walls of both the motor housing 120 and the integrated cylinder 110 are provided with reinforcing ribs 150 to enhance the structural strength of the cylinder and ensure the structural stability of the motor housing 120.

[0042] In some embodiments, the integrated cylinder block 110 includes a cylinder head 112, a cylinder barrel 113, a crankshaft housing 114, and an oil pan 115. The cylinder barrel 113 is integrally disposed on the top of the crankshaft housing 114, the cylinder head 112 is disposed on the cylinder barrel 113, and the oil pan 115 is detachably disposed on the bottom of the crankshaft housing 114 and spliced ​​with the crankshaft housing 114 to form a crankshaft 111 cavity. The crankshaft 111 is rotatably disposed within the crankshaft 111 cavity, and the motor housing 120 is integrally disposed at the rear end of the crankshaft housing 114 and the oil pan 115. Specifically, the structure of the cylinder head 112 and the cylinder barrel 113 is consistent with that of a conventional engine block, and a piston rod can be disposed inside them. The piston rod can drive the crankshaft 111 to rotate. For the transmission structure and working principle of the engine part, refer to existing range extenders. In actual installation, the integrated cylinder block 110 can be assembled first. This involves first installing components such as the piston rod and crankshaft 111 into the cylinder barrel 113 and crankshaft housing 114, and then installing the oil pan 115, which holds the oil. After the integrated cylinder block 110 is assembled, the motor housing 120 can be assembled simultaneously, facilitating the subsequent installation of the motor assembly 130 and end housings.

[0043] It should be noted that in this embodiment, the integrated cylinder block 110 is also equipped with cooling pipes, intake pipes, exhaust pipes and other structures. Its basic structure is the same as that of a conventional range extender engine, and will not be described in detail here.

[0044] In some embodiments, the motor housing 120 includes an upper housing 121 and a lower housing 122. The upper housing 121 is integrally disposed at the rear end of the crankshaft housing 114, and the lower housing 122 is integrally disposed at the rear end of the oil pan 115. The upper housing 121 and the lower housing 122 are joined to form a motor cavity, and the motor stator 131 and the motor rotor 132 are disposed within the motor cavity. Specifically, the upper housing 121 and the crankshaft housing 114 are integrally cast, and the lower housing 122 and the oil pan 115 are integrally cast. The end faces of the upper housing 121 and the lower housing 122 are fitted and joined to form the motor cavity. Of course, in other preferred embodiments of this invention, the motor housing 120 may also be of an integral construction and integrally disposed at the rear end of the crankshaft housing 114 or the rear end of the oil pan 115.

[0045] See Figure 1 and Figure 5Furthermore, the lower housing 122 is provided with an oil sump 123, and the end cover 140 is provided with an oil pump assembly 160. An oil cooling channel 141 is also provided inside the end cover 140. One end of the oil cooling channel 141 extends to the motor assembly 130, and the other end extends to the oil sump 123. The oil pump assembly 160 is connected to the oil cooling channel 141 and is used to pump the cooling oil in the oil sump 123 to the motor assembly 130 through the oil cooling channel 141. Specifically, the oil pump assembly 160 is bonded to the center of the end cover 140, and the lower housing 122 is partially recessed to form the oil sump 123 for storing oil. The oil pump assembly 160 can pump the cooling oil in the oil sump 123 to the motor assembly 130 through the oil cooling channel 141, thereby cooling the motor assembly 130. The cooled hot oil can then drip back into the lower oil sump 123 for storage.

[0046] It is worth noting that in some embodiments, the pumping rotor of the oil pump assembly 160 can be driven to rotate by the motor rotor 132. For example, the rear end of the motor rotor 132 is connected to the pumping rotor of the oil pump assembly 160 through a transmission shaft. During the rotation of the motor rotor 132, the pumping rotor can be driven to rotate synchronously, thereby realizing pumping.

[0047] It should be noted that traditional generators typically use water cooling, which is less efficient and cannot achieve precise temperature control, thus requiring an additional temperature control system for monitoring. In contrast, this embodiment uses oil cooling, which is more efficient. Combined with the precise design of the oil cooling channel 141, precise temperature control can be achieved, eliminating the need for temperature monitoring and reducing design costs.

[0048] In some embodiments, an oil cooler 161 is also provided on the side of the end cap 140 away from the integrated cylinder body 110. The oil cooler 161 is connected to the oil cooling channel 141 and is used to dissipate heat from the cooling oil pumped to the motor assembly 130. Specifically, the oil cooler 161 has a heat exchange coil with heat dissipation fins on the outside, and both the inlet and outlet ends of the heat exchange coil are connected to the oil cooling channel 141. During actual cooling, under the pumping power of the oil pump assembly 160, the cooling oil is sent from the oil sump 123 into the oil cooler 161, cooled, and then enters the motor assembly 130 through the oil cooling channel 141. By providing the oil cooler 161, the cooling capacity of the oil cooling system can be significantly improved.

[0049] In some embodiments, a sealing ring 142 is provided at the rear end opening of the motor housing 120, and the end cover 140 is pressed onto the sealing ring 142 and detachably connected to the motor housing 120 to achieve a sealed connection between the end cover 140 and the motor housing 120. Specifically, a flange ring 124 is provided at the edge of the rear end of the motor housing 120, and the edge of the end cover 140 is pressed onto the flange ring 124. The sealing ring 142 is pressed between the end cover 140 and the flange ring 124 to achieve a sealed connection between the end cover 140 and the flange ring 124 and ensure a sealing effect.

[0050] Furthermore, the flange ring 124 is provided with mounting lugs, and the edge of the end cover 140 is also provided with mounting blocks. Bolts are mounted on the mounting blocks, and the end cover 140 and the flange ring 124 are fastened together by the bolts, thereby ensuring the pressing effect on the sealing ring 142 and further ensuring the sealing effect.

[0051] See Figure 4 In some embodiments, the rear end of the integrated cylinder block 110 is further provided with multiple stator mounting seats 116, which are housed within the motor housing 120. The motor stator 131 is detachably mounted on the multiple stator mounting seats 116. Specifically, the stator mounting seats 116 can be disposed on the rear end face of the crankshaft housing 114. Each stator mounting seat 116 is provided with screw holes, providing multiple mounting points. The motor stator 131 can be fixed to the multiple stator mounting seats 116 by bolts. Furthermore, the rear end of the integrated cylinder block 110 provides structural support for the motor stator 131, ensuring the structural stability of the motor stator 131.

[0052] Please see Figure 2 and Figure 5 In some embodiments, the rear end of the crankshaft 111 extends into the motor housing 120 and is provided with a fixing plate 117. The fixing plate 117 is spaced apart from the stator mounting base 116, and the motor rotor 132 is detachably connected to the fixing plate 117. Specifically, the rear end of the integrated cylinder block 110 is provided with a transmission opening. The crankshaft 111 passes through the transmission opening and extends into the motor housing 120. The end of the crankshaft 111 is provided with a fixing plate 117. The diameter of the fixing plate 117 is larger than that of the transmission opening. The motor rotor 132 can be fixed to the fixing plate 117 with bolts. The crankshaft 111 drives the fixing plate 117 to rotate, and the fixing plate 117 can drive the motor rotor 132 to rotate.

[0053] It should be noted that, due to the integrated arrangement scheme adopted in this embodiment of the utility model, the motor rotor 132 and the motor stator 131 can be closer to the integrated cylinder 110, which shortens the axial dimension. Furthermore, due to the shortening of the axial dimension, the rear end of the motor rotor 132 does not need to be supported by bearings, which reduces the design cost and eliminates the bearing failure and abnormal noise caused by bearing support in conventional schemes.

[0054] See Figure 1 and Figure 5 In some embodiments, the integrated range extender assembly 100 also includes a controller 170. The controller 170 is detachably disposed on the side of the end cover 140 away from the integrated cylinder block 110 and electrically connected to the motor assembly 130. A position sensor (not shown) communicatively connected to the controller 170 is disposed within the integrated cylinder block 110. The position sensor monitors the movement position of the crankshaft 111 and transmits the position information of the crankshaft 111 to the controller 170. Specifically, a three-phase adapter 171 is also disposed on the end cover 140. The three-phase adapter 171 is electrically connected to the motor stator 131 and fixed to the end cover 140 with bolts. The controller 170 can be mounted over the three-phase adapter 171 and fixed to the end cover 140 with bolts. Furthermore, by sending a signal from the crankshaft 111 position sensor to the controller 170, a motor resolver structure in conventional solutions is replaced, reducing design costs and eliminating resolver failures associated with motor resolver solutions.

[0055] The integrated range extender provided in this embodiment integrates the upper housing 121 of the motor housing 120 with the crankshaft housing 114, and the lower housing 122 of the motor housing 120 with the oil pan 115. The assembly sequence is as follows: First, the integrated cylinder block 110 and the motor housing 120 are assembled. Then, the motor stator 131 is fixed to the stator mounting base 116 with bolts. Next, the motor rotor 132 is fixed to the fixed plate 117 of the crankshaft 111 with bolts. Then, the sealing ring 142 is installed on the end cover 140, which integrates the oil pump assembly 160, and the end cover 140 is fixed to the motor housing 120 with bolts. Finally, the three-phase adapter 171 and the controller 170 are fastened to the end cover 140 with bolts. The overall arrangement features a simple and compact structure, reliable fixing and sealing, and simple manufacturing.

[0056] It should be noted that the integrated range extender provided in this embodiment has a shorter axial dimension and lighter weight compared to conventional range extenders. For example, the axial dimension can be shortened by more than 28mm, the weight is reduced by 15kg compared to conventional solutions, and the cost is reduced by 10% compared to conventional solutions.

[0057] This utility model embodiment also provides a range-extended new energy vehicle, including a vehicle body and the aforementioned integrated range extender assembly 100. The integrated range extender assembly 100 includes an integrated cylinder block 110, a motor assembly 130, and an end cover 140. A crankshaft 111 is disposed inside the integrated cylinder block 110, and a rearward-opening motor housing 120 is integrally disposed at the rear end of the integrated cylinder block 110. The motor assembly 130 includes a motor stator 131 and a motor rotor 132. The motor stator 131 is fixedly disposed inside the motor housing 120, and the motor rotor 132 is rotatably disposed at the center of the motor stator 131 and detachably connected to the crankshaft 111 for rotation under the drive of the crankshaft 111. The end cover 140 is detachably sealed and closed at the rear end opening of the motor housing 120. The integrated cylinder block 110 is disposed inside the vehicle body.

[0058] It should be noted that the integrated range extender assembly 100 can be installed in the front engine compartment of the vehicle body.

[0059] In summary, the integrated range extender assembly 100 and the range-extended new energy vehicle provided by this utility model embodiment have a crankshaft 111 installed inside the integrated cylinder block 110, and a rearward-opening motor housing 120 integrally installed at the rear end of the integrated cylinder block 110. The motor stator 131 is fixed inside the motor housing 120, and the motor rotor 132 is rotatably disposed at the center of the motor stator 131 and detachably connected to the crankshaft 111, allowing it to rotate under the drive of the crankshaft 111. The end cover 140 is detachably fitted onto the rear opening of the motor housing 120. Compared with the prior art, the integrated range extender assembly 100 provided by this utility model embodiment integrates the motor housing 120 integrally at the rear end of the integrated cylinder block 110, which can improve the integration point of the range extender and eliminate the need to fix the motor housing 120 with bolts. The structure is simple and compact, and the axial dimension is reduced, which is conducive to the miniaturization and weight reduction of the range extender. Furthermore, the assembly process of the motor housing 120 is eliminated during assembly, resulting in higher assembly efficiency. Production can be carried out on a single production line, making manufacturing simpler and cheaper.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An integrated range extender assembly, characterized in that, include: An integrated cylinder block (110) is provided inside the integrated cylinder block (110), and a motor housing (120) with a rearward opening is integrally provided at the rear end of the integrated cylinder block (110). The motor assembly (130) includes a motor stator (131) and a motor rotor (132). The motor stator (131) is fixedly disposed inside the motor housing (120). The motor rotor (132) is rotatably disposed at the center of the motor stator (131) and detachably connected to the crankshaft (111) for rotating under the drive of the crankshaft (111). End cap (140) is detachably sealed to the rear opening of the motor housing (120).

2. The integrated range extender assembly according to claim 1, characterized in that, The integrated cylinder block (110) includes a cylinder head (112), a cylinder barrel (113), a crankshaft housing (114), and an oil pan (115). The cylinder barrel (113) is integrally disposed on the top of the crankshaft housing (114), the cylinder head (112) is disposed on the cylinder barrel (113), the oil pan (115) is detachably disposed on the bottom of the crankshaft housing (114) and spliced ​​with the crankshaft housing (114) to form a crankshaft (111) cavity. The crankshaft (111) is rotatably disposed in the crankshaft (111) cavity, and the motor housing (120) is integrally disposed on the rear end of the crankshaft housing (114) and / or the oil pan (115).

3. The integrated range extender assembly according to claim 2, characterized in that, The motor housing (120) includes an upper housing (121) and a lower housing (122). The upper housing (121) is integrally disposed at the rear end of the crankshaft housing (114), and the lower housing (122) is integrally disposed at the rear end of the oil pan (115). The upper housing (121) and the lower housing (122) are spliced ​​together to form a motor cavity. The motor stator (131) and the motor rotor (132) are disposed in the motor cavity.

4. The integrated range extender assembly according to claim 3, characterized in that, The lower housing (122) is provided with an oil sump (123), and the end cover (140) is provided with an oil pump assembly (160). The end cover (140) is also provided with an oil cooling channel (141). One end of the oil cooling channel (141) extends to the motor assembly (130), and the other end extends to the oil sump (123). The oil pump assembly (160) is connected to the oil cooling channel (141) and is used to pump the cooling oil in the oil sump (123) to the motor assembly (130) through the oil cooling channel (141).

5. The integrated range extender assembly according to claim 4, characterized in that, An oil cooler (161) is also provided on the side of the end cap (140) away from the integrated cylinder body (110). The oil cooler (161) is connected to the oil cooling channel (141) and is used to dissipate heat from the cooling oil pumped to the motor assembly (130).

6. The integrated range extender assembly according to claim 1, characterized in that, The rear opening of the motor housing (120) is provided with a sealing ring (142). The end cap (140) is pressed onto the sealing ring (142) and is detachably connected to the motor housing (120) so that the end cap (140) and the motor housing (120) are sealed together.

7. The integrated range extender assembly according to claim 1, characterized in that, The rear end of the integrated cylinder body (110) is also provided with a plurality of stator mounting seats (116), which are housed in the motor housing (120), and the motor stator (131) is detachably mounted on the plurality of stator mounting seats (116).

8. The integrated range extender assembly according to claim 7, characterized in that, The rear end of the crankshaft (111) extends into the motor housing (120) and is provided with a fixing plate (117). The fixing plate (117) is spaced apart from the stator mounting base (116), and the motor rotor (132) is detachably connected to the fixing plate (117).

9. The integrated range extender assembly according to claim 1, characterized in that, The integrated range extender assembly also includes a controller (170), which is detachably disposed on the side of the end cover (140) away from the integrated cylinder block (110) and electrically connected to the motor assembly (130). The integrated cylinder block (110) is provided with a position sensor that is communicatively connected to the controller (170). The position sensor is used to monitor the movement position of the crankshaft (111) and transmit the position information of the crankshaft (111) to the controller (170).

10. A range-extended electric vehicle, characterized in that, Includes the integrated range extender assembly as described in any one of claims 1-9.

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