Pure electric semitrailer with power system

Abstract

The utility model provides a pure electric semitrailer with a power system, which relates to the technical field of new energy automobiles and comprises a driving system and a power battery system. The driving system comprises an integrated electric drive bridge and a master control all-in-one structure; the integrated electric drive axle comprises a drive motor, and the master control all-in-one structure controls the drive motor to generate reverse torque for auxiliary braking after receiving a braking signal. The pure electric semitrailer is provided with the driving system and the power battery system, the power battery system supplies power to the driving system, the driving system is used for assisting in driving the pure electric semitrailer and can assist in driving the tractor when running on a flat road, the auxiliary driving time is longer during climbing, and the problem that long-distance climbing power and endurance are insufficient is solved; during long-distance downhill, the large-power battery fully guarantees long-time auxiliary braking; a tractor retarder device is replaced, and the procurement cost of a tractor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a pure electric semi-trailer with a power system. Background Art

[0002] With the vigorous development of my country's industrial civilization, environmental pollution problems have become increasingly serious. New energy vehicles, because they use non-traditional energy to power vehicles, have greatly reduced the impact of automobile emissions on the environment. Electric vehicles and hydrogen-powered vehicles can even achieve true zero emissions. At present, pure electric semi-trailers, as emerging products, have been developed and tested by companies abroad, but there are no mature products and large-scale applications in China.

[0003] At present, the design and manufacturing of domestic semi-trailers need to be towed by fuel tractors or pure electric tractors to be used normally on the road, and the tractor must have strong horsepower. For example, a 40-ton semi-trailer requires a tractor with 500-600 horsepower, and the fuel consumption of the whole vehicle is relatively high. Due to weight and cost considerations, pure electric tractors generally have low power consumption and short driving range.

[0004] The existing technical defects of pure electric semi-trailers are mainly reflected in the lack of auxiliary driving function on flat roads, insufficient power and electricity for auxiliary driving during long uphill journeys, and short auxiliary braking time during long downhill journeys. Utility Model Content

[0005] The purpose of the utility model is to provide a pure electric semi-trailer with a power system, equipped with a drive system and a power battery system, which can solve the problems of no auxiliary drive function on flat roads, insufficient power and power of the auxiliary drive when going uphill for a long distance, and short auxiliary braking time when going downhill for a long distance.

[0006] The utility model provides a pure electric semi-trailer with a power system, comprising:

[0007] Drive system;

[0008] Power battery system;

[0009] The drive system and power battery system are mounted on the frame of the pure electric semi-trailer;

[0010] The drive system includes an integrated electric drive axle and a main control all-in-one structure;

[0011] The integrated electric drive axle drives the pure electric semi-trailer to move;

[0012] The power battery system is electrically connected to the integrated electric drive axle via a main control all-in-one structure;

[0013] The integrated electric drive axle includes a drive motor;

[0014] The main control all-in-one structure controls the drive motor to generate reverse torque to perform auxiliary braking after receiving the braking signal.

[0015] As a further optimization scheme, in order to make the device work better, it also includes:

[0016] Cooling system;

[0017] Low-voltage auxiliary system;

[0018] The cooling system and the low-pressure auxiliary system are mounted on the frame of the pure electric semi-trailer;

[0019] The cooling system is fixedly connected to the cooling water channel of the main control all-in-one structure and the drive motor;

[0020] The low-voltage auxiliary system is electrically connected to the drive system, the main control all-in-one structure and the cooling system.

[0021] As a further optimization solution, in order to drive the pure electric semi-trailer, the integrated electric drive axle includes:

[0022] Electric drive axle body;

[0023] reducer;

[0024] Drive motor;

[0025] The output end of the driving motor is fixedly connected to the input end of the electric drive axle body through a reducer, and the electric drive axle body drives the pure electric semi-trailer to move.

[0026] As a further optimization scheme, in order to control the operation of the drive motor, the main control all-in-one structure includes:

[0027] Motor controller;

[0028] Auxiliary control all-in-one structure;

[0029] The motor controller and auxiliary control all-in-one structure are electrically connected to the drive motor via a high-voltage cable.

[0030] As a further optimization solution, in order to power the drive system, the power battery system includes:

[0031] Battery PACK;

[0032] High voltage box;

[0033] Control box;

[0034] Charging socket;

[0035] The battery PACK is electrically connected to the high voltage box, the control box and the charging socket respectively;

[0036] The high voltage box is electrically connected to the drive system.

[0037] As a further optimization solution, in order to circulate cooling for the main control all-in-one structure and the drive motor, the cooling system includes:

[0038] A radiator having a built-in fan and a water pump, wherein the fan and the water pump are electrically connected to the VCU of the pure electric semi-trailer;

[0039] Expansion tank;

[0040] The water pump drives the coolant to circulate in the radiator, the cooling water channel of the main control all-in-one structure, the cooling water channel of the drive motor and the expansion water tank.

[0041] As a further optimization solution, in order for the VCU to receive signals to control the fan and water pump to start when the preset temperature is reached to dissipate the heat of the circulating water, a temperature sensor is fixedly installed at the water inlet of the radiator, and the temperature sensor is electrically connected to the VCU of the pure electric semi-trailer.

[0042] As a further optimization scheme, in order to power the controllers and fans of the pure electric semi-trailer and convert 220V AC power into living electricity through the inverter, the low-voltage auxiliary system includes:

[0043] Main power switch;

[0044] Fuse boxes;

[0045] Fuse box;

[0046] Battery, the output of which is 24V DC;

[0047] Inverter;

[0048] The battery is electrically connected to the VCU, BMS and MCU of the pure electric semi-trailer through a fuse box;

[0049] A fuse box is electrically connected to the circuit where the battery is located;

[0050] The input end of the fuse box is electrically connected to the DC / DC interface of the main control all-in-one structure, and the output end of the fuse box is electrically connected to the cooling system and the inverter;

[0051] The inverter outputs 220V alternating current.

[0052] As a further optimization solution, in order to cut off the power supply to the high-voltage box through an external MSD manual maintenance switch during maintenance, the high-voltage box is provided with an MSD manual maintenance switch.

[0053] As a further optimization solution, in order to provide a high voltage platform above 600VDC and realize large power supply, the battery PACK is specifically a high-energy lithium iron phosphate battery.

[0054] The utility model provides a pure electric semi-trailer with a power system through improvement, which has the following improvements and advantages compared with the prior art:

[0055] Firstly, the pure electric semi-trailer is equipped with a drive system and a power battery system. The power battery system supplies power to the drive system. The drive system is used to assist in driving the pure electric semi-trailer. When driving on a flat road, it can assist in driving the tractor. When climbing a slope, the auxiliary drive time is longer, solving the problem of insufficient power and endurance for long-distance climbing. When going downhill for a long distance, the large-capacity battery fully guarantees long-term auxiliary braking. It replaces the retarder device of the tractor and reduces the procurement cost of the tractor.

[0056] Secondly, the device solves the problems of insufficient power and short driving range of pure electric tractors, can solve the problem of high fuel consumption of fuel tractors, and reduce the cost of using tractors. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0058] Figure 1 It is a schematic diagram of the three-dimensional axial side structure of the utility model;

[0059] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0060] Figure 3 It is a left-side structural schematic diagram of the utility model;

[0061] Figure 4 It is a right view structural schematic diagram of the utility model;

[0062] Figure 5 This is a schematic diagram of the cooling system structure of the utility model.

[0063] Description of reference numerals:

[0064] 1- The drive system includes an integrated electric drive axle, 2- main control all-in-one structure, 3- expansion tank, 4- water pump, 5- radiator, 6- battery PACK, 7- high voltage box, 8- control box, 9- charging socket, 10- main power switch, 11- fuse box, 12- fuse box, 13- battery, 14- inverter, 15- drive motor, 16- reducer. DETAILED DESCRIPTION

[0065] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0067] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0068] See also Figure 1-5 The utility model provides a technical solution: a pure electric semi-trailer with a power system, comprising:

[0069] Drive system;

[0070] Power battery system;

[0071] The drive system and power battery system are installed on the frame of the pure electric semi-trailer;

[0072] The drive system includes an integrated electric drive axle 1 and a main control all-in-one structure 2. The integrated electric drive axle 1 is installed and fixed at the first axle of the frame of the pure electric semi-trailer, and is used to drive the first axle. The main control all-in-one structure 2 is on the right side of the drive motor 15, which is convenient for arranging cables and cooling pipes.

[0073] The main control all-in-one structure 2 is arranged in the middle of the right frame of the integrated electric drive axle 1, so as to facilitate the connection of cooling pipes and high-voltage cables;

[0074] The integrated electric drive axle 1 drives the pure electric semi-trailer to move;

[0075] The power battery system is electrically connected to the integrated electric drive bridge 1 through the main control all-in-one structure 2, and the connection is through a high-voltage cable, which is used to invert direct current into three-phase alternating current to power the drive motor 15;

[0076] The integrated electric drive axle 1 includes a drive motor 15;

[0077] After receiving the brake signal, the main control all-in-one structure 2 controls the drive motor 15 to generate a reverse torque for auxiliary braking. This brake signal is generated by the driver stepping on the brake pedal. The brake signal is transmitted to the motor controller, and the motor controller controls the drive motor 15 to generate a reverse torque for auxiliary braking.

[0078] In some embodiments, in order to make the device work better, it also includes:

[0079] Cooling system;

[0080] Low-voltage auxiliary system;

[0081] The cooling system and low-pressure auxiliary system are mounted on the frame of the pure electric semi-trailer;

[0082] The cooling system is fixedly connected to the cooling water channel of the main control all-in-one structure 2 and the drive motor 15;

[0083] The low-voltage auxiliary system is electrically connected to the drive system, the main control all-in-one structure 2 and the cooling system, providing a low-voltage auxiliary power supply for the drive system and the power battery system, waking up each controller before power-on. The inverter 14 can provide 220V AC household electricity, providing convenience for the driver.

[0084] In some embodiments, in order to drive a pure electric semi-trailer, the integrated electric drive axle 1 includes:

[0085] The main body of the electric drive axle is a three-axis two-stage reduction;

[0086] The reducer 16 adopts a split reducer housing;

[0087] A driving motor 15, which is a synchronous high-speed motor;

[0088] The above structural combination can take into account the requirements of high torque at start-up and high speed at high speed;

[0089] The output end of the driving motor 15 is fixedly connected to the input end of the electric drive axle body through the reducer 16, and the electric drive axle body drives the pure electric semi-trailer to move.

[0090] In some embodiments, in order to control the operation of the driving motor 15, the main control all-in-one structure 2 includes:

[0091] Motor controller;

[0092] Auxiliary control all-in-one structure, including main positive relay, pre-charge relay, DC / DC, air conditioning control and current and voltage detection equipment,

[0093] The motor controller and the auxiliary control all-in-one structure are electrically connected to the drive motor 15 via a high-voltage cable.

[0094] In some embodiments, in order to power the drive system, the power battery system includes:

[0095] Battery PACK6, located in the lower middle part of the right side of the frame of the integrated motor bridge 1, can avoid lateral collision from the semi-trailer;

[0096] High voltage box 7, in which main negative relay, charging relay and heating relay are arranged, and Hall sensor is responsible for current and voltage detection;

[0097] Control box 8; integrated with BMS battery management system and main control acquisition board, responsible for collecting and forwarding battery system information, fault alarm, insulation detection, controlling the main negative relay, charging relay and heating relay, receiving and executing power-on and power-off instructions, charge and discharge instructions sent by VCU;

[0098] The charging socket 9 uses a 200A fast charging socket to connect the power battery and the charging pile to charge the power battery. The main power switch 10 must be disconnected during charging.

[0099] The high-voltage box 7, the control box 8 and the charging socket 9 are arranged in the high-voltage distribution box in the middle of the frame and on the right side of the battery PACK 6, which is convenient for arranging cables and wiring harnesses and plays a role in waterproofing and dustproofing;

[0100] The battery PACK 6 is electrically connected to the high voltage box 7 , the control box 8 and the charging socket 9 respectively;

[0101] The high voltage box 7 is electrically connected to the drive system.

[0102] In some embodiments, in order to circulate cooling for the main control all-in-one structure 2 and the drive motor 15, the cooling system includes:

[0103] A radiator 5, which has a built-in fan and a water pump 4, and the fan and the water pump 4 are electrically connected to the VCU of the pure electric semi-trailer, and the fan and the water pump 4 are controlled by the VCU of the pure electric semi-trailer;

[0104] The expansion water tank 3, radiator 5 and expansion water tank 3 are arranged on the left side of the main control all-in-one structure 2, so as to shorten the water path length as much as possible and reduce the circulation resistance of the coolant;

[0105] The water pump 4 drives the coolant to circulate in the radiator 5, the cooling water channel of the main control all-in-one structure 2, the cooling water channel of the drive motor 15 and the expansion water tank 3, and the fan and the water pump 4 are started to cool the circulating coolant.

[0106] In some embodiments, in order for the VCU to receive a signal to control the fan and water pump 4 to start when the preset temperature is reached to dissipate the heat of the circulating water, a temperature sensor is fixedly installed at the water inlet of the radiator 5, and the temperature sensor is electrically connected to the VCU of the pure electric semi-trailer. The VCU of the pure electric semi-trailer reads the value of the temperature sensor, and controls the fan and water pump 4 to start when the value exceeds a predetermined value.

[0107] In some embodiments, in order to power the controllers and fans of the pure electric semi-trailer and convert 220V AC power into living electricity through an inverter, the low-voltage auxiliary system includes:

[0108] The main power switch 10 is used to cut off the positive pole of the battery 13 after parking. The main power switch 10 must be disconnected when the charging pile is charging through the strategy, otherwise the battery PACK6 cannot be charged;

[0109] Fuse box 11;

[0110] The fuse box 12, the fuse box 11 and the fuse box 12 play a role of safety insurance;

[0111] Battery 13, the output of which is 24V DC;

[0112] Inverter 14;

[0113] The battery 13 is electrically connected to the VCU, BMS, and MCU of the pure electric semi-trailer through the fuse box 12;

[0114] The circuit where the battery 13 is located is electrically connected to a fuse box 11;

[0115] The input end of the fuse box 11 is electrically connected to the DC / DC interface of the main control all-in-one structure 2, and the output end of the fuse box 11 is electrically connected to the cooling system and the inverter 14;

[0116] The inverter 14 outputs 220V AC power.

[0117] In some embodiments, in order to cut off the power to the high voltage box through an external MSD manual maintenance switch during maintenance, an MSD manual maintenance switch is provided on the high voltage box 7 .

[0118] In some embodiments, in order to provide a high voltage platform above 600 VDC and realize large power supply, the battery PACK6 is specifically a high-energy lithium iron phosphate battery, which adopts a natural heat dissipation solution and monitors the battery status 24 hours a day.

[0119] Working principle:

[0120] When in use, the drive system is powered by the power battery system, and the main control all-in-one structure 2 in the drive system controls the integrated electric drive bridge 1 to work. The integrated electric drive bridge 1 drives the first axle of the pure electric semi-trailer to rotate, thereby realizing auxiliary drive of the pure electric semi-trailer. When driving on a flat road, it can assist in driving the tractor. When climbing a slope, the auxiliary drive time is longer, which solves the problem of insufficient power and endurance for long-distance climbing. When going downhill for a long distance, the driver steps on the brake pedal to generate a braking signal, and the braking signal is transmitted to the motor controller. The motor controller controls the drive motor 15 to generate a reverse torque for auxiliary braking, replacing the tractor retarder device.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pure electric semi-trailer with a power system, characterized in that: include: Drive system; Power battery system; The drive system and power battery system are mounted on the frame of the pure electric semi-trailer; The drive system comprises an integrated electric drive bridge (1) and a main control all-in-one structure (2); The integrated electric drive axle (1) drives the pure electric semi-trailer to move; The power battery system is electrically connected to the integrated electric drive bridge (1) via a main control all-in-one structure (2); The integrated electric drive bridge (1) comprises a drive motor (15); After receiving the braking signal, the main control all-in-one structure (2) controls the drive motor (15) to generate a reverse torque to perform auxiliary braking.

2. A pure electric semi-trailer with a power system according to claim 1, characterized in that: Also includes: Cooling system; Low-voltage auxiliary system; The cooling system and the low-pressure auxiliary system are mounted on the frame of the pure electric semi-trailer; The cooling system is fixedly connected to the cooling water channels of the main control all-in-one structure (2) and the drive motor (15); The low-voltage auxiliary system is electrically connected to the drive system, the main control all-in-one structure (2) and the cooling system.

3. A pure electric semi-trailer with a power system according to claim 1, characterized in that: The integrated electric drive bridge (1) comprises: Electric drive axle body; Reducer (16); A driving motor (15); The output end of the driving motor (15) is fixedly connected to the input end of the electric drive axle body via a reducer (16), and the electric drive axle body drives the pure electric semi-trailer to move.

4. A pure electric semi-trailer with a power system according to claim 1, characterized in that: The main control all-in-one structure (2) comprises: Motor controller; Auxiliary control all-in-one structure; The motor controller and auxiliary control all-in-one structure are electrically connected to the drive motor (15) via a high-voltage cable.

5. The pure electric semi-trailer with a power system according to claim 1, characterized in that: The power battery system comprises: Battery PACK (6); High voltage box (7); Control box (8); Charging socket (9); The battery PACK (6) is electrically connected to the high voltage box (7), the control box (8) and the charging socket (9) respectively; The high voltage box (7) is electrically connected to the drive system.

6. A pure electric semi-trailer with a power system according to claim 2, characterized in that: The cooling system comprises: A radiator (5) having a fan and a water pump (4) built therein, wherein the fan and the water pump (4) are electrically connected to the VCU of the pure electric semi-trailer; Expansion water tank (3); The water pump (4) drives the coolant to circulate in the radiator (5), the cooling water channel of the main control all-in-one structure (2), the cooling water channel of the drive motor (15) and the expansion water tank (3).

7. A pure electric semi-trailer with a power system according to claim 6, characterized in that: A temperature sensor is fixedly mounted at the water inlet of the radiator (5), and the temperature sensor is electrically connected to the VCU of the pure electric semi-trailer.

8. A pure electric semi-trailer with a power system according to claim 2, characterized in that: The low-pressure auxiliary system comprises: Main power switch (10); Fuse box (11); Fuse box (12); A battery (13) having an output of 24V DC; Inverter (14); The storage battery (13) is electrically connected to the VCU, BMS and MCU of the pure electric semi-trailer through the fuse box (12); The circuit where the storage battery (13) is located is electrically connected to a fuse box (11); The input end of the fuse box (11) is electrically connected to the DC / DC interface of the main control all-in-one structure (2), and the output end of the fuse box (11) is electrically connected to the cooling system and the inverter (14); The inverter (14) outputs 220V alternating current.

9. A pure electric semi-trailer with a power system according to claim 5, characterized in that: The high-voltage box (7) is provided with an MSD manual maintenance switch.

10. The pure electric semi-trailer with a power system according to claim 5, characterized in that: The battery PACK (6) is specifically a high-energy lithium iron phosphate battery.

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