High-voltage power distribution system of plug-in hybrid electric vehicle and assembly method of high-voltage power distribution system

Abstract

According to the high-voltage power distribution system of the plug-in hybrid electric vehicle and the assembling method of the high-voltage power distribution system, the front cabin module, the rear cabin module and the power battery module in the middle of the vehicle body are arranged, and the front power distributor is arranged in the front cabin through the motor controller; a power generator, a driving motor, a high-voltage electric compressor, a high-voltage electric heater and the like are subjected to concentrated power distribution, and meanwhile, a rear cable group is adopted in a rear cabin to realize electric connection of a three-in-one rear electric drive, a vehicle-mounted slow charging motor and a power battery module, so that a power distribution framework with front and rear partitions and clear paths is formed; according to the high-voltage distribution system, the cross and redundant arrangement of the high-voltage wiring harnesses in the front cabin area and the rear cabin area is effectively reduced, the space and thermal safety pressure caused by coexistence of an exhaust system and high-voltage electric parts is relieved, the high-voltage distribution path and the system integration complexity are simplified, and the safety, arrangement reasonability and system reliability of high-voltage distribution of the whole vehicle are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, in particular to a high-voltage power distribution system of a plug-in hybrid electric vehicle and an assembling method thereof. BACKGROUND

[0002] In the current new energy vehicle field, a plug-in hybrid electric vehicle (PHEV) has a significantly increased overall volume and system complexity compared to a traditional fuel vehicle or a pure electric vehicle due to the configuration of an engine, a drive motor and a power battery system. The existing PHEV model usually arranges an engine and a hybrid power dedicated transmission assembly in a front compartment, arranges a rear motor at a rear floor, and sets a power battery in a front floor area between the front hybrid power assembly and the rear motor, and needs to reasonably arrange a high-voltage wire harness and an exhaust system to meet the safety and vehicle performance requirements. In the prior art, some models adopt a 400V high-voltage architecture and a combination scheme of a three-in-one rear electric drive and a vehicle-mounted charging machine CCU (Charging Control Unit).

[0003] However, under the 400V high-voltage architecture, since a multi-in-one electric drive is not adopted, a three-in-one rear electric drive, a CCU slow charging device, a high-voltage wire harness and an exhaust rear-end component usually need to be configured at the same time, resulting in limited arrangement space of the rear floor area. The exhaust rear-end, as a high-temperature heat source, needs to maintain a safe distance from the rear electric drive, the CCU and the high-voltage wire harness, and also needs to meet the ground clearance requirement of the exhaust system. The hybrid power engine, the hybrid power transmission, the motor controller system, the high-voltage electric compressor, the high-voltage electric heater, the high-voltage wire harness and the exhaust front-end component also need to be arranged in the front compartment area, which needs to simultaneously consider the thermal safety, the high-voltage power distribution safety and the power distribution requirements of various power modes in the limited space, so that the existing high-voltage power distribution structure and power distribution mode are relatively complex, and the system integration is difficult. SUMMARY

[0004] The present application aims to overcome the above problems and provide a high-voltage power distribution system of a plug-in hybrid electric vehicle and an assembling method thereof.

[0005] The technical solution of the present application provides a high-voltage power distribution system of a plug-in hybrid electric vehicle, which comprises a front compartment module arranged in a front compartment of a vehicle, a rear compartment module arranged in a rear compartment of the vehicle and a power battery module arranged in a middle part of the vehicle body.

[0006] The front compartment module comprises a hybrid power transmission, a motor controller and at least one high-voltage electrical accessory, the hybrid power transmission is internally provided with a generator and a drive motor, and the motor controller is internally provided with a front power distributor. The high-voltage electrical accessory comprises a high-voltage electric compressor and a high-voltage electric heater. The high-pressure electric compressor, the high-pressure electric heater, the generator and the driving motor are respectively electrically connected with the front power distributor in the motor controller, and are respectively electrically connected with the power battery module through a front high-pressure cable group; The rear cabin module comprises a three-in-one rear electric drive and a vehicle-mounted slow-charging charger. The three-in-one rear electric drive and the vehicle-mounted slow-charging charger are respectively electrically connected with the power battery module through a rear cable group.

[0007] Further, the front high-pressure cable group comprises a first cable and a second cable; The generator is electrically connected with the front power distributor in the motor controller, and is electrically connected with the power battery module through the first cable; The high-pressure electric compressor, the high-pressure electric heater and the driving motor are respectively electrically connected with the front power distributor in the motor controller, and are respectively electrically connected with the power battery module through the second cable.

[0008] Further, a rear power distributor is arranged on the rear cable group, and the rear power distributor is fixedly installed on a shell of the three-in-one rear electric drive; The three-in-one rear electric drive and the vehicle-mounted slow-charging charger are respectively electrically connected with the rear power distributor through the rear cable group, and are respectively electrically connected with the power battery module through the rear power distributor.

[0009] Further, the rear cable group comprises a slow-charging low-voltage cable and an electric drive high-voltage cable; The three-in-one rear electric drive is sequentially electrically connected with the rear power distributor and the power battery module through the electric drive high-voltage cable; The vehicle-mounted slow-charging charger is sequentially electrically connected with the rear power distributor and the power battery module through the slow-charging low-voltage cable.

[0010] Further, the high-voltage power distribution system further comprises a charging interface module for charging the power battery module, and the charging interface module is electrically connected with the power battery module.

[0011] Further, the charging interface module comprises a slow-charging socket; The slow-charging socket is sequentially electrically connected with the vehicle-mounted slow-charging charger, the rear power distributor and the power battery module through the slow-charging low-voltage cable.

[0012] Further, the charging interface module further comprises a fast-charging socket; The rear cabin module further comprises a direct-current charging cable for electrically connecting the fast-charging socket and the power battery module.

[0013] The technical scheme of the application further provides an assembling method of the high-voltage power distribution system of the plug-in hybrid electric vehicle. S1: in the front compartment of the vehicle, the motor controller is fixed above the hybrid transmission, the high-voltage electric compressor and the high-voltage electric heater are arranged above the motor controller side and are respectively electrically connected with the motor controller. S2: the power battery module is arranged in the middle part of the vehicle body and is electrically connected with the motor controller through the front high-voltage cable group.

[0014] Further, the method comprises a rear compartment assembling method: The on-board slow charging charger is installed below the rear floor of the vehicle body through a fixed support assembly, the fixed support assembly comprises a heat insulation plate arranged between the on-board slow charging charger and the exhaust system of the vehicle. The rear cable group is connected to electrically connect the power battery module, the three-in-one rear electric drive and the on-board slow charging charger.

[0015] Further, when arranging the front high-voltage cable group, the front high-voltage cable group is fixed by using the fixed points on the battery pack anti-collision beam, the hybrid transmission housing and the motor controller housing.

[0016] After the above technical scheme is adopted, the following beneficial effects are achieved: The high-voltage power distribution system of the plug-in hybrid electric vehicle and the assembling method thereof have the following beneficial effects: by arranging the front compartment module, the rear compartment module and the power battery module in the middle part of the vehicle body and using the built-in front power distributor in the motor controller to centrally distribute power for the generator, the drive motor, the high-voltage electric compressor and the high-voltage electric heater, the electric connection between the three-in-one rear electric drive, the on-board slow charging charger and the power battery module is realized by using the rear cable group in the rear compartment, a front-rear partitioned and path clear power distribution architecture is formed, the cross and redundant arrangement of the high-voltage wire harness in the front compartment and the rear compartment area are effectively reduced, the space and thermal safety pressure caused by the coexistence of the exhaust system and the high-voltage electrical components are relieved, the high-voltage power distribution path and system integration complexity are simplified, and the safety, rationality and reliability of the high-voltage power distribution of the vehicle are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The disclosure of the application will become more apparent with reference to the drawings. It should be understood that the drawings are only for the purpose of illustration and are not intended to limit the scope of protection of the application. In the drawings: Figure 1 is a structural schematic view of the high-voltage power distribution system of the plug-in hybrid electric vehicle in an embodiment of the application; Figure 2is a structural schematic diagram of a front high-voltage cable group in an embodiment of the present application; Figure 3 is a structural schematic diagram of a rear cable group in an embodiment of the present application; Figure 4 is a structural schematic diagram of a DC charging cable in an embodiment of the present application; Figure 5 is a top view of a high-voltage power distribution system of a plug-in hybrid electric vehicle in an embodiment of the present application.

[0018] Correspondence table of reference signs: Front cabin module 1: hybrid transmission 11, generator 111, drive motor 112, motor controller 12, front power distributor 121, high-voltage electrical accessory 13, high-voltage electric compressor 131, high-voltage electric heater 132, front high-voltage cable group 14, first cable 141, second cable 142, hybrid engine 15; Rear cabin module 2: three-in-one rear electric drive 21, on-board slow charging charger 22, rear cable group 23, slow charging low-voltage cable 231, electric drive high-voltage cable 232, rear power distributor 24, DC charging cable 25; Power battery module 3, Charging interface module 4: slow charging socket 41, fast charging socket 42. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings.

[0020] It is easily understood that, according to the technical solution of the present application, a person skilled in the art can replace various structural modes and implementation modes with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the whole or as a limitation or restriction on the technical solution of the application.

[0021] In the present specification, the orientation terms such as up, down, left, right, front, rear, front surface, back surface, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structure shown in the drawings, and they are relative concepts, so they can be changed accordingly according to different positions and different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third" are only for descriptive purposes, and should not be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two components. For those skilled in the art, the above-mentioned specific meanings in the present application can be understood according to the specific circumstances.

[0023] As shown in Figure 1 and Figure 2 , a high-voltage power distribution system of a plug-in hybrid electric vehicle in an embodiment of the present application, comprising a front compartment module 1 arranged in the front compartment of the vehicle, a rear compartment module 2 arranged in the rear compartment of the vehicle, and a power battery module 3 arranged in the middle of the vehicle body; The front compartment module 1 comprises a hybrid transmission 11, a motor controller 12 and at least one high-voltage electrical accessory 13, the hybrid transmission 11 is internally provided with a generator 111 and a drive motor 112, and the motor controller 12 is internally provided with a front power distributor 121; The high-voltage electrical accessory 13 comprises a high-voltage electric compressor 131 and a high-voltage electric heater 132; The high-voltage electric compressor 131, the high-voltage electric heater 132, the generator 111 and the drive motor 112 are respectively electrically connected with the front power distributor 121 in the motor controller 12, and are respectively electrically connected with the power battery module 3 through a front high-voltage cable group 14; The rear compartment module 2 comprises a three-in-one rear electric drive 21 and a vehicle-mounted slow-charging charger 22; The three-in-one rear electric drive 21 and the vehicle-mounted slow-charging charger 22 are respectively electrically connected with the power battery module 3 through a rear cable group 23.

[0024] In the embodiment, the high-voltage power distribution system of the plug-in hybrid electric vehicle is divided into the front compartment module 1, the rear compartment module 2 and the power battery module 3 arranged in the middle of the vehicle body according to the overall space structure of the vehicle. Through the regionalization and modularization design of the high-voltage power distribution system, the high-voltage electrical components and their corresponding power distribution units form a relatively concentrated arrangement relationship in space, which reduces the structural complexity of the overall high-voltage system of the vehicle as a whole, and provides a basis for integrating multiple high-voltage electrical functions in the limited vehicle body space.

[0025] In the vehicle front compartment, the hybrid transmission 11, the motor controller 12, and the high-voltage electric accessories 13 such as the high-voltage electric compressor 131 and the high-voltage electric heater 132 are integrally arranged, wherein the hybrid transmission 11 internally integrates the generator 111 and the drive motor 112, and the motor controller 12 internally arranges the front power distributor 121. By centrally arranging the front power distributor 121 in the motor controller 12, unified power distribution and management of the generator 111, the drive motor 112, and the plurality of front-compartment high-voltage electric accessories 13 are realized, so that the front-compartment high-voltage power distribution structure is more compact, and the dispersion and repeated arrangement of the high-voltage wire harness in the front compartment are reduced.

[0026] Specifically, the front power distributor 121 is built-in in the motor controller 12, and the control unit in the motor controller 12 can uniformly control and manage the front power distributor 121 to realize on-off control and energy distribution of the generator 111, the drive motor 112, and the front-compartment high-voltage electric accessories 13 such as the high-voltage electric compressor 131 and the high-voltage electric heater 132. By integrally arranging the power distribution function and the motor control function in the same motor controller 12, the installation space occupied by the separately arranged independent high-voltage power distributor in the front compartment area is avoided, the length of the high-voltage wire harness in the front compartment is further shortened, and the number of high-voltage connection points is reduced, thereby facilitating improvement of the integration and reliability of the high-voltage power distribution system. At the same time, since the front-compartment high-voltage electric accessories 13 are all electrically connected to the power battery module 3 through the front power distributor 121, the switching requirements of various high-voltage electric modes under different working conditions can be met, the centralized management of the front-compartment high-voltage load is realized, the complexity of the high-voltage wire harness arrangement in the front compartment area is effectively reduced, and the high-voltage safety of the whole vehicle is improved.

[0027] In the vehicle rear compartment area, the rear-compartment module 2 includes a three-in-one rear electric drive 21 and a vehicle-mounted slow-charging charger 22, both of which are electrically connected to the power battery module 3 through a rear cable group 23, and the vehicle-mounted slow-charging charger 22 is a CCU (on-board charger). By centrally arranging the rear electric drive system and the slow-charging function in the rear compartment and forming a relatively independent rear high-voltage power distribution path with the power battery module 3 located in the middle of the vehicle body, the length of the high-voltage wire harness in the rear compartment is effectively shortened, and the cross interference between the high-voltage wire harness and the high-temperature components such as the exhaust system in the rear floor area is reduced.

[0028] The embodiment realizes high integration and reasonable distribution of the high-voltage power distribution structure without increasing the complexity of the high-voltage architecture by the partition power distribution of the front-compartment module 1 and the rear-compartment module 2, the built-in of the front power distributor 121 in the motor controller 12, and the connection of the front high-voltage cable group and the rear cable group to the power battery module 3, thereby effectively alleviating the problem of tight arrangement of the front compartment and the rear compartment area of the plug-in hybrid electric vehicle under the 400V high-voltage architecture, and improving the safety, reliability, and engineering implementability of the high-voltage power distribution system of the whole vehicle.

[0029] AsFigure 1 and Figure 2 As shown in FIG. 1, in one embodiment, the front high-voltage cable group 14 includes a first cable 141 and a second cable 142; The generator 111 is electrically connected to the front power distributor 121 in the motor controller 12 and is electrically connected to the power battery module 3 through the first cable 141; The high-voltage electric compressor 131, the high-voltage electric heater 132, and the drive motor 112 are respectively electrically connected to the front power distributor 121 in the motor controller 12 and are respectively electrically connected to the power battery module 3 through the second cable 142.

[0030] In this embodiment, the front high-voltage cable group 14 includes the first cable 141 and the second cable 142. The generator 111 is electrically connected to the front power distributor 121 inside the motor controller 12 and is electrically connected to the power battery module 3 through the first cable 141, realizing bidirectional transmission of energy. The high-voltage electric compressor 131, the high-voltage electric heater 132, and the drive motor 112 are respectively electrically connected to the front power distributor 121 and are electrically connected to the power battery module 3 through the second cable 142, that is, the front high-voltage cable group 14 contains two main power distribution circuits. The first power distribution circuit connects the generator 111 and the front power distributor 121 inside the motor controller 12. The second power distribution circuit collects the high-voltage electric compressor 131, the high-voltage electric heater 132, and the drive motor 112 and connects them to the front power distributor 121, realizing centralized power supply and unified management of each front cabin high-voltage electrical component. By dividing different types of front cabin high-voltage loads into two groups of cables for centralized power distribution, not only the complexity and space occupation of the wire harness arrangement are reduced, but also the integration and safety of the high-voltage system are effectively improved, and at the same time, it is convenient to realize flexible switching of multi-functional power supply mode in the limited front cabin space.

[0031] Specifically, in the front-drive mode, bidirectional transmission of electrical energy is realized between the power battery module 3, the motor controller 12, and the drive motor 112 built in the hybrid transmission 11 through the front high-voltage cable group 14. The positive electrode current of the power battery module 3 enters the positive electrode of the front power distributor 121 inside the motor controller 12 through the front high-voltage cable group 14, and supplies power to the drive motor 112 built in the hybrid transmission 11 through the front power distributor 121; the negative electrode current of the drive motor 112 returns to the negative electrode of the power battery module 3 through the negative electrode of the front power distributor 121, completing the front-drive hybrid power distribution.

[0032] In the power generation mode, the hybrid engine 15 drives the generator 111 to generate electricity, the positive current of the generator 111 enters the front high-voltage cable group 14 negative pole to return to the negative pole of the power battery module 3, the power battery module 3 outputs current after completing the internal chemical reaction, and the current returns to the front distributor 121 positive pole through the front high-voltage cable group 14 and supplies the generator 111 negative pole, thereby realizing power distribution and power generation. The front-drive hybrid power distribution and power generation distribution mode realizes efficient energy flow between the power battery, the hybrid engine 15, the generator 111, and the front cabin high-voltage electrical accessories 13.

[0033] In one embodiment, the first cable 141 and the second cable 142 are integrated into an integrated high-voltage cable assembly, which realizes centralized management of the front cabin high-voltage components by arranging the generator 111 power supply circuit and the front cabin high-voltage accessories and drive motor 112 power supply circuit in the same wire harness, reduces the number and space occupation of the front cabin wire harness, reduces the complexity of high-voltage wiring, improves the reliability and assembly convenience of the wire harness arrangement, and facilitates safe and efficient high-voltage power distribution in limited space.

[0034] As shown in Figure 1 and Figure 3 In another embodiment, the rear cable group 23 is provided with a rear distributor 24, and the rear distributor 24 is fixedly installed on the shell of the three-in-one rear electric drive 21. The three-in-one rear electric drive 21 and the on-board slow-charging charger 22 are respectively electrically connected with the rear distributor 24 through the rear cable group 23, and are respectively electrically connected with the power battery module 3 through the rear distributor 24.

[0035] In this embodiment, the rear cable group 23 is provided with a rear distributor 24, and the rear distributor 24 is fixedly installed on the shell of the three-in-one rear electric drive 21. By directly integrating the rear distributor 24 on the shell of the three-in-one rear electric drive 21, the high-voltage power distribution unit in the rear cabin is integrally arranged with the rear electric drive, reducing the need for independent power distributors and shortening the connection path of the high-voltage cable.

[0036] In this embodiment, the three-in-one rear electric drive 21 and the on-board slow-charging charger 22 are respectively electrically connected with the rear distributor 24 through the rear cable group 23, and are uniformly electrically connected with the power battery module 3 through the rear distributor 24. The rear distributor 24 is used for centralized distribution of high-voltage electrical energy from the power battery module 3, so that the power battery module 3 can provide driving power to the three-in-one rear electric drive 21, and the on-board slow-charging charger 22 can provide charging-related power, thereby realizing unified access and centralized management of the rear cabin high-voltage electrical components.

[0037] The high-voltage power distribution function of the rear compartment is concentrated on the rear power distributor 24 of the three-in-one rear electric drive 21 housing in this embodiment, not only reducing the number and complexity of the high-voltage wiring harness of the rear compartment, but also effectively compressing the occupied space of the rear floor area, which is conducive to meeting the installation needs of the rear electric drive, the on-board slow-charging charger 22, and the exhaust system in the limited layout space. Since the high-voltage power distribution nodes are more concentrated, the number of high-voltage connection interfaces is reduced, the reliability and assembly consistency of the high-voltage system are improved, and the risk of arranging the high-voltage wiring harness near the heat source is reduced, thereby improving the safety and integration of the vehicle high-voltage system.

[0038] The rear compartment module 2 is arranged in the space area corresponding to the rear chassis structure of the vehicle, which is usually located near the rear axle behind the passenger compartment and below or adjacent to the rear floor of the vehicle body. The rear floor area of the vehicle body refers to the rear floor of the vehicle and the installation space formed below it, which is used to arrange the rear compartment related components, including the rear electric drive system, the on-board slow-charging charger 22, the high-voltage wiring harness, and the related power distribution components.

[0039] As shown in Figure 1 In one embodiment, the rear cable group 23 includes a slow-charging low-voltage cable 231 and an electric drive high-voltage cable 232. The three-in-one rear electric drive 21 is electrically connected to the rear power distributor 24 and the power battery module 3 in sequence through the electric drive high-voltage cable 232. The on-board slow-charging charger 22 is electrically connected to the rear power distributor 24 and the power battery module 3 in sequence through the slow-charging low-voltage cable 231.

[0040] In this embodiment, the rear cable group 23 includes a slow-charging low-voltage cable 231 and an electric drive high-voltage cable 232. The three-in-one rear electric drive 21 is electrically connected to the rear power distributor 24 through the electric drive high-voltage cable 232, and further electrically connected to the power battery module 3 through the rear power distributor 24. The on-board slow-charging charger 22 is electrically connected to the rear power distributor 24 through the slow-charging low-voltage cable 231, and further electrically connected to the power battery module 3 through the rear power distributor 24.

[0041] In this embodiment, the rear cable group 23 is divided into an electric drive high-voltage cable 232 and a slow-charging low-voltage cable 231, and connected to the three-in-one rear electric drive 21 and the on-board slow-charging charger 22, respectively, so that the power circuits of different voltage levels and different functional attributes are clearly separated in structure, effectively reducing the complexity and electrical interference risk caused by the mixed arrangement of high-voltage and low-voltage lines in the rear compartment. At the same time, the different types of cables are connected and managed uniformly by the rear power distributor 24, which is conducive to simplifying the layout of the rear compartment wiring harness, improving the standardization and assembly efficiency of the wiring harness layout, and further improving the safety and reliability of the vehicle high-voltage power distribution system.

[0042] In one of the embodiments, the slow charging low-voltage cable 231 and the electric drive high-voltage cable 232 are integrated into a composite cable assembly, which has a unified protective outer layer and a fixed structure, and which internally contains a slow charging low-voltage wire bundle and an electric drive high-voltage wire bundle that are insulated from each other, and which respectively leads out a slow charging low-voltage interface and an electric drive high-voltage interface at the corresponding connection end, so as to realize electrical connection with the rear power distributor 24, the three-in-one rear electric drive 21, and the vehicle-mounted slow charging charger 22.

[0043] The embodiment significantly reduces the number of independent wire bundles by physically integrating the two types of cables with different functions and specifications into a standardized wire bundle assembly; reduces the assembly complexity caused by the cross and scattered arrangement of the cables, and is conducive to improving the space utilization of the rear floor area; and the integrated cable assembly facilitates pre-assembly and overall fixation during the rear compartment assembly stage, reduces the assembly process difficulty, improves assembly consistency and reliability, and helps to reduce the interference risk of wire bundle arrangement on the exhaust system and surrounding components, thereby improving the integration and safety of the high-voltage system of the vehicle.

[0044] As shown in Figure 1 In one of the embodiments, the high-voltage power distribution system further includes a charging interface module 4 for charging the power battery module 3, and the charging interface module 4 is electrically connected with the power battery module 3.

[0045] In the embodiment, the high-voltage power distribution system further includes a charging interface module 4 for charging the power battery module 3, and the charging interface module 4 is electrically connected with the power battery module 3, for inputting electrical energy to the power battery module 3 when the vehicle is connected to an external power source.

[0046] The embodiment sets the charging interface module 4, so that the power battery module 3 can not only interact with the electrical components through the high-voltage power distribution system of the vehicle, but also can be independently charged under the condition of external power supply, which takes into account the dual needs of the plug-in hybrid electric vehicle for driving energy supply and external energy supplement, and provides a structural basis for the configuration of different charging methods such as slow charging and fast charging.

[0047] As shown in Figure 1 In one of the embodiments, the charging interface module 4 includes a slow charging socket 41; The slow charging socket 41 is sequentially electrically connected with the vehicle-mounted slow charging charger 22, the rear power distributor 24, and the power battery module 3 through the slow charging low-voltage cable 231.

[0048] In the embodiment, the charging interface module 4 includes a slow charging socket 41, the slow charging socket 41 is electrically connected with the vehicle-mounted slow charging charger 22 through the slow charging low-voltage cable 231, and the vehicle-mounted slow charging charger 22 is electrically connected with the power battery module 3 through the rear power distributor 24.

[0049] In this embodiment, the slow charging socket 41 is connected to the vehicle-mounted slow charging machine 22 through the slow charging low-voltage cable 231, and is connected to the power battery module 3 through the rear power distributor 24, so that the slow charging circuit can be arranged in cooperation with the high-voltage power distribution structure of the rear compartment, which is beneficial to reducing the number of independent charging wire harnesses and simplifying the wire harness layout of the rear floor area. At the same time, the slow charging power can be uniformly managed through the rear power distributor 24, which improves the safety and controllability of the charging path and provides structural support for realizing stable and reliable slow charging function of the plug-in hybrid electric vehicle.

[0050] As shown in Figure 1 and Figure 4 In one embodiment, the charging interface module 4 further includes a fast charging socket 42. The rear compartment module 2 further includes a direct current charging cable 25 for electrically connecting the fast charging socket 42 and the power battery module 3.

[0051] In this embodiment, the charging interface module 4 further includes a fast charging socket 42, which is arranged on the outside of the vehicle or adjacent to the rear compartment module 2. The rear compartment module 2 further includes a direct current charging cable 25 for electrically connecting the fast charging socket 42 and the power battery module 3, so that the external direct current power source can directly input power to the power battery module 3 through the fast charging socket 42.

[0052] In this embodiment, the charging interface module 4 further includes a fast charging socket 42, which is arranged on the outside of the vehicle or adjacent to the rear compartment module 2. The rear compartment module 2 further includes a direct current charging cable 25 for electrically connecting the fast charging socket 42 and the power battery module 3, so that the external direct current power source can directly input power to the power battery module 3 through the fast charging socket 42.

[0053] In one embodiment, in the power distribution mode of the front-drive pure electric, high-voltage electric compressor 131 and high-voltage electric heater 132, the power battery module 3 is electrically connected to the motor controller 12 through the front high-voltage cable group 14, and the front power distributor 121 arranged in the motor controller 12 uniformly distributes power to the drive motor 112, high-voltage electric compressor 131 and high-voltage electric heater 132 built in the hybrid transmission 11.

[0054] The positive electrode current of the power battery module 3 enters the positive electrode end of the front power distributor 121 through the front high-voltage cable group 14, and supplies power to the driving motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132 respectively; the negative electrode current generated in the working process of the driving motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132 is collected through the negative electrode end of the front power distributor 121, and then returns to the negative electrode of the power battery module 3 through the front high-voltage cable group 14, thereby forming a front driving pure electric combined power supply loop of the power battery module 3 to the driving motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132.

[0055] In another embodiment, in the front driving hybrid, high-voltage electric compressor 131, high-voltage electric heater 132 power distribution and power generation power distribution mode, the power battery module 3, the hybrid engine 15, the motor controller 12 and the driving motor 112 and the generator 111 built-in the hybrid transmission 11 realize unified distribution and backflow control of energy through the front high-voltage cable group 14 and the front power distributor 121 inside the motor controller 12.

[0056] In the front driving hybrid power distribution stage, the positive electrode current of the power battery module 3 enters the positive electrode end of the front power distributor 121 through the front high-voltage cable group 14, and supplies power to the driving motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132 built-in the hybrid transmission 11; the negative electrode current generated in the working process of the above-mentioned power consumption components is collected through the negative electrode end of the front power distributor 121, and then returns to the negative electrode of the power battery module 3 through the front high-voltage cable group 14, thereby forming a front driving hybrid combined power distribution loop of the power battery module 3 to the driving motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132.

[0057] In the power generation power distribution stage, the hybrid engine 15 drives the generator 111 built-in the hybrid transmission 11 to generate electricity, and the current generated by the generator 111 is transmitted to the power battery module 3 through the front power distributor 121 inside the motor controller 12 and the front high-voltage cable group 14, thereby realizing charging of the power battery module 3; at the same time, the current loop formed in the charging process of the power battery module 3 returns to the corresponding port of the generator 111 through the front high-voltage cable group 14 and the front power distributor 121, thereby completing the power generation power distribution in the front driving hybrid working condition.

[0058] In another embodiment, in the four-wheel pure electric, high-voltage electric compressor 131, high-voltage electric heater 132 power distribution mode, the power battery module 3 establishes a pure electric driving high-voltage power supply relationship with the motor controller 12 and the three-in-one rear electric drive 21 through the front high-voltage cable group 14 and the rear cable group 23 respectively, thereby simultaneously realizing pure electric driving of the front drive and the rear drive, and providing electric energy for the front cabin high-voltage electrical accessories 13.

[0059] In the front-drive pure electric power distribution process, the positive electrode current of the power battery module 3 enters the positive electrode end of the front power distributor 121 inside the motor controller 12 through the front high-voltage cable group 14, and is supplied to the drive motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132 built in the hybrid power transmission 11; the negative electrode current generated in the working process of the above-mentioned power consumption components is collected through the negative electrode end of the front power distributor 121, and then returned to the negative electrode of the power battery module 3 through the front high-voltage cable group 14, thereby forming a front-drive pure electric power distribution loop of the power battery module 3 to the drive motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132.

[0060] In the rear-drive pure electric power distribution process, the positive electrode current of the power battery module 3 is transmitted to the positive electrode end of the three-in-one rear electric drive 21 through the rear cable group 23, and the electric energy is converted into motor drive inside the three-in-one rear electric drive 21, and then returned to the negative electrode of the power battery module 3 through the negative electrode end of the three-in-one rear electric drive 21 through the rear cable group 23, thereby forming a rear-drive pure electric power distribution loop of the power battery module 3 to the three-in-one rear electric drive 21.

[0061] In another embodiment, in the four-wheel drive hybrid, high-voltage electric compressor 131, high-voltage electric heater 132 power distribution and power generation distribution mode, the hybrid engine 15, the power battery module 3, the motor controller 12 and the three-in-one rear electric drive 21 work cooperatively through the front high-voltage cable group 14 and the rear cable group 23, to realize the comprehensive energy management of front-drive hybrid drive, rear-drive pure electric drive and power generation energy recovery.

[0062] In the front-drive hybrid power distribution process, the positive electrode current of the power battery module 3 enters the positive electrode end of the front power distributor 121 inside the motor controller 12 through the front high-voltage cable group 14, and is supplied to the drive motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132 built in the hybrid power transmission 11; the corresponding negative electrode current is collected through the negative electrode end of the front power distributor 121, and then returned to the negative electrode of the power battery module 3 through the front high-voltage cable group 14, thereby forming a front-drive hybrid power distribution loop of the power battery module 3 to the drive motor 112, the high-voltage electric compressor 131 and the high-voltage electric heater 132.

[0063] In the power generation distribution process, the hybrid engine 15 drives the generator 111 built in the hybrid power transmission 11 to generate electricity, and the current output by the generator 111 enters the front high-voltage cable group 14 through the negative electrode end of the front power distributor 121 and flows back to the negative electrode of the power battery module 3; after the power battery module 3 completes the energy conversion inside, the output current returns to the positive electrode of the power battery module 3 through the front high-voltage cable group 14, and then returns to the positive electrode end of the front power distributor 121 and supplies the negative electrode of the generator 111, thereby forming a power generation distribution loop under the condition of front-drive hybrid, and realizing the charging of the power battery module 3.

[0064] Meanwhile, in the rear driving power distribution process, the positive electrode current of the power battery module 3 is transmitted to the positive electrode end of the three-in-one rear electric drive 21 through the rear cable group 23, and the electric energy is returned to the negative electrode of the power battery module 3 through the negative electrode end of the three-in-one rear electric drive 21 after the driving conversion in the three-in-one rear electric drive 21, so as to form a rear driving pure electric power distribution loop of the power battery module 3 to the three-in-one rear electric drive 21.

[0065] The embodiment of the present application also provides an assembling method of the high-voltage power distribution system of the plug-in hybrid electric vehicle, and the method comprises a front compartment assembling method: S1: in the vehicle front compartment, the motor controller 12 is fixed above the hybrid transmission 11, the high-voltage electric compressor 131 and the high-voltage electric heater 132 are arranged above the side of the motor controller 12, and are respectively electrically connected with the motor controller 12; S2: the power battery module 3 is arranged in the middle of the vehicle body and is electrically connected with the motor controller 12 through the front high-voltage cable group 14.

[0066] Specifically, the method comprises a front compartment assembling step, in step S1, in the vehicle front compartment, the motor controller 12 is fixed and installed at the position above the hybrid transmission 11, and the high-voltage electric compressor 131 and the high-voltage electric heater 132 are arranged above the side of the motor controller 12, so that the above-mentioned high-voltage electrical components form a centralized arrangement relationship in space and are respectively electrically connected with the motor controller 12; in step S2, the power battery module 3 is arranged in the middle of the vehicle body and is electrically connected with the motor controller 12 through the front high-voltage cable group 14, so as to complete the assembling connection between the front compartment high-voltage power distribution system and the power battery module 3.

[0067] By adopting the above-mentioned front compartment assembling method, the motor controller 12, the high-voltage electric compressor 131 and the high-voltage electric heater 132 are modularized and centrally installed in the front compartment, which is beneficial to shorten the wiring length of the front high-voltage cable group 14, reduce the dispersion of the high-voltage wire harness, and reduce the wiring complexity of the front compartment. Meanwhile, the power battery module 3 is directly connected with the motor controller 12 through the front high-voltage cable group 14, which is convenient for the sub-assembly and assembly operation in the vehicle assembly stage, improves the assembly efficiency and consistency, and helps to improve the reliability and safety of the front compartment high-voltage power distribution system.

[0068] In one of the embodiments, the method comprises a rear compartment assembling method: The on-board slow charging machine 22 is installed below the rear floor of the vehicle body through a fixed support assembly, and the fixed support assembly comprises a heat insulation plate arranged between the on-board slow charging machine 22 and the exhaust system of the vehicle; The rear cable group 23 is connected to electrically connect the power battery module 3, the three-in-one rear electric drive 21 and the on-board slow charging machine 22.

[0069] In the embodiment, the method comprises a rear compartment assembly method: first, the on-board slow charging charger 22 is installed below the rear floor of the vehicle body through a fixed support assembly, wherein the fixed support assembly is arranged between the on-board slow charging charger 22 and the exhaust system of the vehicle and is integrated with a heat insulation plate structure for heat insulation protection of the on-board slow charging charger 22; then, the rear high-voltage cable group is connected, so that the power battery module 3 is electrically connected with the three-in-one rear electric drive 21 and the on-board slow charging charger 22 respectively, thereby completing the high-voltage electrical connection and overall arrangement of the slow charging system and the rear electric drive system in the rear compartment area of the vehicle body.

[0070] In the embodiment, the on-board slow charging charger 22 is arranged below the rear floor of the vehicle body, and a heat insulation plate is arranged between the on-board slow charging charger 22 and the exhaust system, which can effectively reduce the influence of exhaust system heat on the operation of the charger and improve the reliability and service life of the slow charging system under high-temperature working conditions. At the same time, the rear cable group 23 concentrates the power battery module 3, the three-in-one rear electric drive 21 and the on-board slow charging charger 22 in the rear compartment area for electrical connection, which is conducive to shortening the length of high-voltage cables, reducing the complexity of wiring harness arrangement and energy loss, and improving the integration, safety and assembly consistency of the vehicle high-voltage power distribution system.

[0071] In one of the preferred embodiments, when the front high-voltage cable group 14 is arranged, the front high-voltage cable group 14 is fixed by using the fixed points on the battery pack crash beam, the hybrid transmission 11 housing and the motor controller 12 housing.

[0072] In the preferred embodiment, when the front high-voltage cable group 14 is arranged, the front high-voltage cable group 14 is fixed by using the fixed points on the battery pack crash beam, the hybrid transmission 11 housing and the motor controller 12 housing, so as to realize the stable arrangement of the front high-voltage cable group 14 in the front compartment of the vehicle. This fixing mode ensures that the high-voltage cable group is stably arranged along the designed path, avoids cable displacement, loosening or wear caused by vehicle vibration or thermal expansion, and ensures that the cable maintains a safe distance from the surrounding parts.

[0073] In the embodiment, the front high-voltage cable group 14 is fixed by using the fixed points on the vehicle structure at key positions, which can effectively reduce the damage risk of the wiring harness caused by vibration or collision and improve the reliability and safety of the front compartment high-voltage system. At the same time, the reasonable use of the fixed points is conducive to shortening the running direction of the high-voltage cable and optimizing the layout of the wiring harness, and provides a compact, centralized and easy-to-assemble power distribution environment for other high-voltage electrical components in the front compartment, such as the motor controller 12, the high-voltage electric compressor 131 and the high-voltage electric heater 132, thereby improving the integration and maintenance convenience of the vehicle high-voltage power distribution system.

[0074] As Figure 5As shown, in one embodiment, the hybrid engine 15 and the hybrid transmission 11 are arranged on the right side of the front compartment inside the front compartment, and the left side mechanism is fixedly connected with the hybrid transmission 11. The motor controller 12 is fixedly arranged on the upper portion of the hybrid transmission 11, and provides multi-mode power distribution for the front pure electric, high-voltage electric compressor 131 and high-voltage electric heater 132 through the built-in integrated front power distributor. The output interface is oriented 45° downward to the left to optimize the wire harness layout. The high-voltage cable is arranged along the lowest point of the whole vehicle, passes through the crash beam and the hybrid transmission 11 housing, maintains a safe thermal gap with the exhaust front pre-catalyst assembly, and ensures the heat resistance and service life of the high-voltage components.

[0075] As shown, Figure 5 In one embodiment, the three-in-one rear electric drive 21 is fixed to the rear subframe by three-point suspension, the right side is fixed with the external integrated rear power distributor 24 of the rear cable group 23, and the rear power distributor 24 is arranged towards the vehicle head to connect with the power battery module 3, thereby ensuring the integrity of the front and rear high-voltage power distribution circuit. The on-board slow charging machine 22 is fixed as a whole with a fixed support and a heat insulation plate, which ensures sufficient thermal isolation with the rear exhaust pipe and the subframe, and facilitates the maintenance of the rear compartment.

[0076] According to the needs, the above technical solutions can be combined to achieve the best technical effect.

[0077] The above is only the principle and the preferred embodiment of the present application. It should be noted that for those skilled in the art, the embodiments obtained by appropriately combining the technical solutions disclosed in different embodiments are also included in the technical scope of the present application, and on the basis of the principles of the present application, several other variants can also be made, which should be regarded as the protection scope of the present application.

Claims

1. A high-voltage power distribution system for a plug-in hybrid electric vehicle, characterized in that, This includes a front compartment module for placement in the front compartment of the vehicle, a rear compartment module for placement in the rear compartment of the vehicle, and a power battery module for placement in the middle of the vehicle body. The front cabin module includes a hybrid transmission, a motor controller, and at least one high-voltage electrical accessory. The hybrid transmission contains a generator and a drive motor, and the motor controller contains a front power distribution unit. The high-voltage electrical accessories include a high-voltage electric compressor and a high-voltage electric heater; The high-voltage electric compressor, the high-voltage electric heater, the generator, and the drive motor are respectively electrically connected to the front distribution unit in the motor controller, and are respectively electrically connected to the power battery module through the front high-voltage cable group; The rear cabin module includes a three-in-one rear electric drive and an on-board slow charger. The three-in-one rear electric drive and the on-board slow charger are electrically connected to the power battery module via rear cable groups.

2. The high-voltage power distribution system for a plug-in hybrid electric vehicle according to claim 1, characterized in that, The front high-voltage cable group includes a first cable and a second cable; The generator is electrically connected to the front distributor in the motor controller, and is also electrically connected to the power battery module via the first cable. The high-voltage electric compressor, the high-voltage electric heater, and the drive motor are respectively electrically connected to the front distribution unit in the motor controller, and are respectively electrically connected to the power battery module through the second cable.

3. The high-voltage power distribution system for a plug-in hybrid electric vehicle according to claim 1, characterized in that, A rear power distribution unit is provided on the rear cable assembly, and the rear power distribution unit is fixedly installed on the housing of the three-in-one rear electric drive. The three-in-one rear electric drive and the on-board slow charger are electrically connected to the rear power distribution unit via the rear cable group, and are also electrically connected to the power battery module via the rear power distribution unit.

4. The high-voltage power distribution system for a plug-in hybrid electric vehicle according to claim 3, characterized in that, The rear cable assembly includes a slow-charging low-voltage cable and an electric drive high-voltage cable; The three-in-one rear electric drive is electrically connected to the rear power distribution unit and the power battery module in sequence via the electric drive high-voltage cable; The on-board slow charger is electrically connected to the rear power distribution unit and the power battery module in sequence via the slow charging low-voltage cable.

5. The high-voltage power distribution system for a plug-in hybrid electric vehicle according to claim 4, characterized in that, The high-voltage power distribution system also includes a charging interface module for charging the power battery module, and the charging interface module is electrically connected to the power battery module.

6. The high-voltage power distribution system for a plug-in hybrid electric vehicle according to claim 5, characterized in that, The charging interface module includes a slow charging socket; The slow charging socket is electrically connected in sequence to the vehicle-mounted slow charging unit, the rear power distribution unit, and the power battery module via the slow charging low-voltage cable.

7. The high-voltage power distribution system for a plug-in hybrid electric vehicle according to claim 6, characterized in that, The charging interface module also includes a fast charging socket; The rear compartment module also includes a DC charging cable for electrically connecting the fast charging socket and the power battery module.

8. An assembly method for a high-voltage power distribution system for a plug-in hybrid electric vehicle as described in any one of claims 1-7, characterized in that, The method includes a forward cabin assembly method: S1: In the front compartment of the vehicle, the motor controller is fixed above the hybrid transmission, and the high-voltage electric compressor and the high-voltage electric heater are arranged above the motor controller and electrically connected to the motor controller respectively; S2: The power battery module is placed in the middle of the vehicle body and electrically connected to the motor controller through the front high-voltage cable group.

9. The assembly method of a high-voltage power distribution system for a plug-in hybrid electric vehicle according to claim 8, characterized in that, The method includes a rear cabin assembly method: The on-board slow charger is mounted under the rear floor of the vehicle body via a mounting bracket assembly, the mounting bracket assembly including a heat insulation plate for placement between the on-board slow charger and the vehicle exhaust system; Connect the rear cable assembly to electrically connect the power battery module, the three-in-one rear electric drive, and the on-board slow charger.

10. The assembly method of a high-voltage power distribution system for a plug-in hybrid electric vehicle according to claim 8, characterized in that, When arranging the front high-voltage cable assembly, the front high-voltage cable assembly is secured using fixing points on the battery pack anti-collision beam, the hybrid transmission housing, and the motor controller housing.

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