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Electric automobile and electro-hydraulic hybrid power driving system

An electro-hydraulic hybrid and power-driven technology, which is applied in the field of electro-hydraulic hybrid drive system, two-wheel drive or four-wheel drive electric vehicles, can solve the problems of increasing battery and motor load and impact, reducing battery service life, accelerating motor power demand, etc. , to achieve the effect of improving service life and safety, avoiding impact, and meeting the requirements of high power density and high energy density

Pending Publication Date: 2021-05-25
QINGDAO CREATE HLDG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This power drive system has the following disadvantages: (1) battery life bottleneck
(2) Acceleration does not match the normal driving motor power requirements
Recovering and reusing braking energy is an important measure to improve the mileage of electric vehicles, but the ability and efficiency of traditional batteries and electric drive systems to reversely transmit power and store energy in real time are poor, and the stored energy is limited. Generally, electric vehicles can only be recycled 10-15% of the braking energy, and the control is complicated, more importantly, the battery is charged and discharged frequently, which increases the load and impact of the battery and the motor, and reduces the service life of the battery

Method used

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  • Electric automobile and electro-hydraulic hybrid power driving system
  • Electric automobile and electro-hydraulic hybrid power driving system
  • Electric automobile and electro-hydraulic hybrid power driving system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Such as image 3 As shown, an electro-hydraulic hybrid drive system 1 for electric vehicles is shown, including a central controller 100, a speed reducer 20, an electro-hydraulic integrated machine 10 connected to the speed reducer 20, and a valve group assembly 90 , an accumulator 50, the electro-hydraulic integrated machine 10 includes a motor housing assembly 11 and a motor assembly accommodated in the motor housing assembly, a first hydraulic pump / motor assembly 14, the motor assembly includes a rotor assembly 12. The stator assembly 13, the motor housing assembly 11 is provided with a valve group assembly 90, the accumulator 50 is connected to the valve group assembly 90, and the electro-hydraulic hybrid power assembly has:

[0086] a. Work in the pure electric mode, that is, fully receive the electric energy of the battery pack 110 and convert it into mechanical energy, or convert the mechanical energy into the working mode of the electric energy of the battery pa...

Embodiment 2

[0093] Such as Figure 5 As shown, an embodiment of a two-drive electric vehicle comprising the electro-hydraulic hybrid drive system is shown, which includes a battery pack 100, a drive axle 34, a differential 31, and the speed reducer 20 and the differential 31 On the reducer housing, the differential 31 is respectively connected with the left half shaft 32 and the right half shaft 33 of the driving axle 34 and drives the wheels to move, and the driving axle 34 can be in the form of driving the front axle or driving the rear axle.

[0094] Further, as Figure 8 As shown, it is a block diagram of the drive system of a two-wheel drive electric vehicle, which includes a motor controller 200, a valve group assembly controller 400, and an inverter 500. The central controller 100 connected to the battery can communicate with the external charging interface 120. connection, here also includes a charging inverter 121. For example, charging interface 120 may absorb electrical energ...

Embodiment 3

[0114] Such as Image 6 , 7 As shown, an embodiment of a four-wheel drive electric vehicle including the electro-hydraulic hybrid drive system is shown.

[0115] One of the preferred embodiments is a four-wheel drive electric vehicle driven by front and rear axles, such as Image 6 As shown, the four-wheel drive electric vehicle includes a battery pack 110, a first drive axle 35, a second drive axle 36, a differential 31, and a second hydraulic pump / motor 40, and the electro-hydraulic hybrid drive system 1 is set at On the first drive axle 35, and through the differential 31, it is connected with the left half shaft 32 and the right half shaft 33 of the first drive axle 35 to drive the first wheel 61 to move, and the second hydraulic pump / motor 40 passes through the differential 31 is connected with the left half shaft 32 and the right half shaft 33 of the second drive axle 36 and drives the second wheel 62 to move, and the second hydraulic pump / motor 40 is connected with th...

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Abstract

The invention belongs to the field of automobiles, and discloses an electric automobile and an electro-hydraulic hybrid power driving system, the driving system comprise a central controller, a battery pack, a speed reducer, an electro-hydraulic all-in-one machine connected with the speed reducer, a valve group assembly and an energy accumulator, the electro-hydraulic all-in-one machine comprises a motor shell assembly, a rotor assembly, a stator assembly and a first hydraulic pump / motor assembly, the rotor assembly, the stator assembly and the first hydraulic pump / motor assembly are contained in the motor shell assembly, and the electro-hydraulic hybrid power driving system can work in a pure electric mode, a pure hydraulic mode and an electro-hydraulic hybrid mode. The electro-hydraulic hybrid power driving system can be used for two-wheel-drive and four-wheel-drive electric automobiles. The electro-hydraulic hybrid power driving system has the characteristics that the structure is compact, the endurance mileage is long, the battery life is long, the requirements of the electric automobile for high power density and high energy density can be met, and different modes are used according to different working conditions.

Description

technical field [0001] The invention belongs to the field of automobiles, in particular to an electro-hydraulic hybrid drive system with different drive modes and braking energy recovery modes and a two-wheel drive or four-wheel drive electric vehicle including the drive system. Background technique [0002] Pure electric vehicles and hybrid electric vehicles can effectively realize the energy saving and emission reduction of vehicles, and more and more people pay more and more attention to them, becoming the most important research direction of new energy vehicles. At present, countries around the world have formulated timetables for stopping the sale of fuel vehicles. For example, countries that have announced a ban on the sale of fuel vehicles from 2025 to 2040 include China, the United States, France, Germany, Japan, the Netherlands, India, the United Kingdom, Sweden, and Canada. In 20 or 30 major countries, the world's major automakers have also announced their respecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K6/00B60K17/16B60K17/356
CPCB60K6/00B60K17/165B60K17/356
Inventor 钟彪尹学军
Owner QINGDAO CREATE HLDG
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