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Electric motorcycle and power assembly and control method thereof

A technology of electric motorcycles and powertrains, which is applied in the direction of electric vehicles, control drives, control devices, etc., and can solve the problems affecting the power battery pack endurance and rechargeable cycles, service efficiency and service life decline, and power battery pack capacity. Problems such as decline, to achieve the effect of ensuring battery life and service life, prolonging service life and improving stability

Pending Publication Date: 2019-05-03
BAFANG ELECTRIC (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the electric drive method commonly used in electric motorcycles is the motor drive constant speed ratio. Under the condition of constant speed ratio drive, the motor can only provide a torque with a reasonable reduction ratio under a certain working condition, and it can only be used in a narrow range. If you want to meet the torque requirements of electric motorcycles for complex working conditions, you can only increase the motor speed continuously, regardless of the harm to the battery caused by high-current discharge, and use the peak power, peak torque and peak value of the motor. The current drives the motor to obtain the corresponding torque to meet the needs of the actual working conditions, but this will undoubtedly lead to high heat generation of the motor, a decrease in service efficiency and life, and then a sharp drop in the capacity of the limited and precious power battery pack , which seriously affects the endurance and rechargeable times of the power battery pack

Method used

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  • Electric motorcycle and power assembly and control method thereof
  • Electric motorcycle and power assembly and control method thereof
  • Electric motorcycle and power assembly and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a specific embodiment of the power assembly of the electric motorcycle provided by the present invention.

[0040] Such as figure 1 As shown, the present invention provides a power assembly of an electric motorcycle, including a motor 1, a gearbox 2 and a clutch 3, the gearbox 2 has several gears, and the clutch 3 can be connected to the rotating shaft 11 of the motor 1 and the clutch 2 of the gearbox 2. Input shaft 21 .

[0041] Different from the fixed speed ratio scheme in the prior art, the power assembly provided by the present invention also includes a gearbox 2, the gearbox 2 has several gears, and can provide different speed ratios. By switching gears, the motor 1 can The high-efficiency working state is maintained in a relatively large speed range, which can largely prevent the motor 1 from working at the limit speed state for a long time, and can reduce the time for the high-current...

Embodiment 2

[0067] The present invention also provides an electric motorcycle, including a power assembly, and the power assembly is the power assembly of the electric motorcycle involved in each implementation manner in the first embodiment.

[0068] Since the powertrain of the electric motorcycle in the first embodiment already has the above technical effects, then the electric motorcycle with the powertrain should also have similar technical effects, so it will not be repeated here.

Embodiment 3

[0070] Please refer to Figure 2-4 , figure 2 It is a flow chart of the control method of the electric motorcycle provided by the present invention, image 3 It is a flow chart of the control method of the electric motorcycle provided by the present invention in the process of upshifting, Figure 4 It is a flow chart of the control method of the electric motorcycle provided by the present invention during the downshifting process.

[0071] Such as figure 2 As shown, the present invention also provides a control method for an electric motorcycle, which is suitable for the electric motorcycle in Embodiment 2. The control method specifically includes the following steps: Step S1, obtaining the vehicle speed V and the turning angle of the electric motorcycle α and the current gear position D; step S2, determine whether the vehicle speed V and the rotation angle α meet the shifting conditions, if so, execute step S3; step S3, output the shift prompt signal; step S4, obtain the...

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Abstract

The invention discloses an electric motorcycle as well as a power assembly and a control method thereof, wherein the power assembly comprises a motor, a gearbox and a clutch; the gearbox is provided with a plurality of gears, and the clutch can be connected with a rotating shaft of the motor and an input shaft of the gearbox. The power assembly further comprises the gearbox that is provided with aplurality of gears so as to provide different speed ratios; according to the technical scheme, different speed ratios can be provided; the motor can be kept in an efficient working state in a large vehicle speed interval through gear shifting; the motor can be prevented from working in a limit rotating speed state for a long time to a large extent, the large-current discharging time of a power battery pack can be shortened, and the cruising ability and the service life of the power battery pack can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric motorcycles, in particular to an electric motorcycle, its power assembly and a control method. Background technique [0002] At present, the electric drive method commonly used in electric motorcycles is the motor drive constant speed ratio. Under the condition of constant speed ratio drive, the motor can only provide a torque with a reasonable reduction ratio under a certain working condition, and it can only be used in a narrow range. If you want to meet the torque requirements of electric motorcycles for complex working conditions, you can only increase the motor speed continuously, regardless of the harm to the battery caused by high-current discharge, and use the peak power, peak torque and peak value of the motor. The current drives the motor to obtain the corresponding torque to meet the needs of the actual working conditions, but this will undoubtedly lead to high heat generation of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K17/08B60L15/20
CPCY02T10/72
Inventor 王清华方道霖
Owner BAFANG ELECTRIC (SUZHOU) CO LTD
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