CN210478380U

CN210478380U - 48V system application structure of medium-weight truck

Info

Publication number: CN210478380U
Application number: CN201921129532.XU
Authority: CN
Inventors: 王睿; 钟小华; 康明; 杨帆; 刘诗逸
Original assignee: Dongfeng Commercial Vehicle Co Ltd
Current assignee: Dongfeng Commercial Vehicle Co Ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-05-08
Anticipated expiration: 2029-07-18

Abstract

The utility model provides a 48V system application structure of medium-weight truck, this 48V system include BSG motor, inverter, 48V lithium cell and DCDC converter, the BSG motor be connected with the inverter, the inverter be connected with the 48V lithium cell, the 48V lithium cell be connected with the DCDC converter, this application structure still includes engine and two sets of 48V systems, the BSG motor in two sets of 48V systems all is connected with the bent axle steamboat through belt (1), and the DCDC converter in two sets of 48V systems is connected with the 12V battery respectively, and these two 12V batteries establish ties and are used for whole car electric power supply. The application of the 48V system to the medium and heavy truck engine can be realized, the current of the use environment can be reduced, and the heat generation during the use can be reduced.

Description

48V system application structure of medium-weight truck

Technical Field

The utility model relates to a 48V system application structure, more specifically the 48V system application structure of well heavy truck that says so relates to belongs to automobile engine technical field.

Background

At present, the country pays more and more attention to environmental protection, the requirement on emission is more and more strict, and the national V emission standard is implemented nationwide in 2018 and 1 month; in addition, from the viewpoint of national energy safety, oil consumption for automobiles accounts for six of the total oil consumption, and therefore, whether it is a passenger car or a commercial car, it is inevitable to produce a more energy-saving automobile.

The cost of the 48V hybrid system is about 7000 yuan, and compared with a traditional vehicle and a heavily-mixed new energy vehicle, the cost performance is higher. At present, 48V systems are applied to partial passenger vehicles in batches, can save oil by 8-10% on average, overcome the problem of low power and overlarge current of a low-voltage system, realize the functions of starting and stopping the automobile, assisting power, recovering brake energy, expanding starting and stopping and the like, enable an engine to always run between the optimal working conditions, eliminate oil consumption, emission and noise of the engine during idling operation, and eliminate the oil consumption generated under the working conditions of sudden acceleration and braking of the engine. However, the 48V system applied to the medium and heavy truck still has the defect of excessive system current due to the large starting power and starting torque of the engine of the medium and heavy truck, so that the 48V system cannot be directly applied to the field of commercial vehicles.

Disclosure of Invention

The utility model aims to provide a well heavily block 48V system application structure to the defect that current 48V system can not directly be used in the commercial car field.

In order to achieve the above object, the technical solution of the present invention is: the utility model provides a 48V system application structure of medium-weight truck, this 48V system include BSG motor, inverter, 48V lithium cell and DCDC converter, the BSG motor be connected with the inverter, the inverter be connected with the 48V lithium cell, the 48V lithium cell be connected with the DCDC converter, this application structure still includes engine and two sets of 48V systems, the BSG motor in two sets of 48V systems all is connected with the bent axle steamboat through the belt, the DCDC converter in two sets of 48V systems is connected with the 12V battery respectively, these two 12V batteries establish ties and are used for whole car electric power supply.

One BSG motor in the two sets of 48V systems is arranged at the position of the generator, and the other BSG motor is arranged at the position of the air conditioner compressor.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses used two sets of 48V systems, connected on the bent axle steamboat jointly through the belt, realized the application of 48V system on well heavily block the engine. Each set of system can share half of current during operation, can reduce the generating heat of circuit and components and parts when using, when having solved present medium and heavy truck and using 48V system, use one set of system, the electric current is too big, has caused the circuit to generate heat seriously, needs cooling system, problem such as with high costs.

Drawings

Fig. 1 is a block diagram of the present invention.

In the figure, a belt 1 and a clutch 2.

Detailed Description

The invention is described in further detail below with reference to the following description of the drawings and the detailed description.

Referring to fig. 1, a 48V system application structure of a medium and heavy truck includes a BSG motor, an inverter, a 48V lithium battery, and a DCDC converter, where the BSG motor is connected to the inverter, the inverter is connected to the 48V lithium battery, and the 48V lithium battery is connected to the DCDC converter. The application structure comprises an engine and two sets of 48V systems, wherein the power connection mode is that BSG motors in the two sets of 48V systems are connected with a crankshaft small wheel through a belt 1, the starting power of the BSG motors is 5-20KW, and the starting torque of the BSG motors is 20-80 Nm; the belt 1 is connected with an engine, the engine is connected with a clutch 2, the clutch 2 is connected with a gearbox, the gearbox is connected with a main reducer, and the main reducer is connected with wheels. Because the electrical systems adopted by the medium and heavy truck are both 24V systems, and the existing mature DCDC converter in the market is 48V to 12V, two batteries of 12Vv are connected in series to supply power for the whole truck, specifically: DCDC converters in the two sets of 48V systems are respectively connected with 12V batteries, and the two 12V batteries are connected in series and used for electrically supplying power to the whole vehicle; namely, the 48V lithium battery is converted into 12V voltage through DCDC, charged into a 12V battery, and then two 12V batteries in two sets of 48V systems are connected in series to supply power to a 24V electric system of the medium heavy truck.

Referring to fig. 1, one BSG motor in the two sets of 48V systems is arranged at the generator position; another BSG motor is located at the air conditioning compressor and replaces the mechanical compressor with an electric compressor.

Referring to fig. 1, the application structure of the 48V system of the medium-weight truck adopts two sets of 48V systems to provide starting and stopping, power assistance and energy recovery for the engine of the commercial vehicle. When the 48V system is used for starting the engine, the BSG motors of the two sets of 48V systems transmit starting torque to the small crankshaft wheel through the belt 1 to drive the crankshaft so as to start the engine; when the 48V system is used as power assistance, the BSG motors of the two sets of 48V systems output power to the small crankshaft wheel through the belt, and further provide larger power for the engine; when the 48V system realizes the function of recovering the braking energy, the engine reversely drags two sets of BSG motors through the crankshaft small wheel, and the BSG generates electricity to charge the energy into the corresponding battery.

Specific example 1:

referring to fig. 1, two sets of 48V systems are adopted, a battery is 48V20AH, and the two BSG systems are matched with an inverter, a BSG motor and a DCDC converter, wherein the BSG motor has the power of 5KW and the starting torque of 20Nm, and then the two BSG motors are connected to a crankshaft small wheel through a belt 1, so that the functions of starting and stopping of an engine, power assistance and energy recovery are realized.

Specific example 2:

referring to fig. 1, two sets of 48V systems are adopted, a battery is 48V20AH, and the two BSG systems are matched with an inverter, a BSG motor and a DCDC converter, wherein the power of the BSG motor is 10KW, the starting torque is 40Nm, and then the two BSG motors are connected to a small crankshaft wheel through a belt 1, so that the functions of starting and stopping of an engine, power assistance and energy recovery are realized.

Specific example 3:

referring to fig. 1, two sets of 48V systems are adopted, a battery is 48V20AH, and the two BSG systems are matched with an inverter, a BSG motor and a DCDC converter, wherein the BSG motor has the power of 20KW and the starting torque of 80Nm, and then the two BSG motors are connected to a small crankshaft wheel through a belt 1, so that the functions of starting and stopping of a large displacement engine, power assistance and energy recovery are realized.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, above-mentioned structure should all be regarded as belonging to the utility model discloses a protection scope.

Claims

1. A48V system application structure of a medium and heavy truck comprises a BSG motor, an inverter, a 48V lithium battery and a DCDC converter, wherein the BSG motor is connected with the inverter, the inverter is connected with the 48V lithium battery, and the 48V lithium battery is connected with the DCDC converter, and the 48V system application structure is characterized in that: the application structure further comprises an engine and two sets of 48V systems, BSG motors in the two sets of 48V systems are connected with the crankshaft small wheel through a belt (1), DCDC converters in the two sets of 48V systems are respectively connected with 12V batteries, and the two 12V batteries are connected in series and used for electrically supplying power to the whole vehicle.

2. The 48V system application structure of medium heavy truck according to claim 1, characterized in that: one BSG motor in the two sets of 48V systems is arranged at the position of the generator, and the other BSG motor is arranged at the position of the air conditioner compressor.