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Vehicle braking method, device, vehicle, electronic equipment and storage medium

A vehicle braking and vehicle technology, applied in the direction of control devices, control drives, vehicle components, etc., can solve the problems of electric vehicles with dual motors that cannot provide braking methods, achieve high braking energy recovery power, and improve electric energy use efficiency , the effect of prolonging the battery life

Active Publication Date: 2022-04-26
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides a vehicle braking method, device, vehicle, electronic equipment and storage medium to solve the technical problem in the prior art that an effective braking method cannot be provided for an electric vehicle with dual motors

Method used

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  • Vehicle braking method, device, vehicle, electronic equipment and storage medium
  • Vehicle braking method, device, vehicle, electronic equipment and storage medium
  • Vehicle braking method, device, vehicle, electronic equipment and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This embodiment provides a vehicle braking method, the braking method is suitable for an electric vehicle, and the electric vehicle includes a first motor and a second motor. The executive subject of this embodiment is a vehicle braking device, which can be installed on an electric vehicle.

[0069] like figure 2 As shown, it is a schematic structural diagram of the electric vehicle provided in this embodiment, the electric vehicle includes a first motor, a first motor controller, a second motor, a second motor controller, a vehicle braking device, a vehicle battery and a battery management system , wherein the vehicle braking device can communicate with the first motor controller, the second motor, and the second motor controller of the first motor based on a controller area network (CAN), so as to control the first motor and the second motor controller. The second motor takes control.

[0070] like image 3 As shown, it is a schematic flow chart of a vehicle braki...

Embodiment 2

[0094] Due to the different loads of electric vehicles, the motor models used by each electric vehicle are different, and different types of motors will have different maximum braking torques. In some cases, considering the use scenarios and functional limitations of electric vehicles, such as engineering electric vehicles with low speed, the electric vehicle is only equipped with dual motors with a small maximum braking torque. In this case, braking may occur. The problem of insufficient dynamic torque. That is to say, the sum of the maximum braking torque output by the first motor and the second motor is less than the total braking torque required by the vehicle.

[0095] In order to solve the above problem of insufficient braking torque, Figure 5 It is a schematic flowchart of another vehicle braking method provided in this embodiment.

[0096] like Figure 5 As shown, as an implementable manner, on the basis of the above embodiments, optionally, after determining the t...

Embodiment 3

[0106] On the basis of the above-mentioned embodiments, during the motor braking process of the electric vehicle, the vehicle battery is always in a charging state. In order to avoid damage to the vehicle battery during the motor braking process and ensure the safety of the vehicle battery, this implementation The example provides yet another vehicle braking method.

[0107] like Image 6 As shown, it is a schematic flow chart of another vehicle braking method provided in this embodiment. As an implementable manner, on the basis of the above-mentioned embodiments, optionally, after determining multiple braking torques according to the total braking torque Before the candidate motor braking torque group, also include:

[0108] Step 108, judging whether the motor can be used for vehicle braking according to the state of the vehicle battery;

[0109] If so, the method of determining the first braking torque and the second braking torque based on the total braking torque describ...

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Abstract

The present application provides a vehicle braking method, device, vehicle, electronic equipment and storage medium. The method includes: determining the total braking torque required for braking the vehicle according to the received braking signal; A candidate motor braking torque group, the motor braking torque group includes the first braking torque that the first motor should output, and the second braking torque that the second motor should output, and the first braking torque and the second braking torque The sum of the braking torque is the total braking torque; according to the preset motor performance relationship list, the braking energy recovery power of the electric vehicle under each candidate motor braking torque group is determined respectively, and the braking energy recovery power is calculated according to each braking energy recovery power Determine the output braking torque group; use the first braking torque and the second braking torque in the output braking torque group to control the first motor and the second motor to brake the vehicle. The dual-motor electric vehicle maintains relatively high braking energy recovery power, thereby improving the electric energy utilization efficiency of the electric vehicle.

Description

technical field [0001] The present application relates to the technical field of electric vehicles, in particular to a vehicle braking method, device, vehicle, electronic equipment and storage medium. Background technique [0002] The emergence of electric vehicles has greatly saved environmental energy and reduced environmental pollution. With the advancement of science and technology, the development of electric vehicle technology will also become an inevitable trend of social development. [0003] In the prior art, in order to improve the electric energy utilization rate of the vehicle battery in the electric vehicle, the electric vehicle usually has a braking energy recovery function, based on the braking energy recovery function, the kinetic energy generated by the braking torque is converted into electric energy, and the converted Electrical energy is stored in the vehicle battery. [0004] However, the foregoing methods are generally based on electric vehicles with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/10B60L7/18B60L15/20B60W30/18
CPCB60L7/10B60L7/18B60L15/2009B60W30/18127B60L2240/423B60W2710/083Y02T10/72
Inventor 柳晓东苗强李富民朱鲁明
Owner WEICHAI POWER CO LTD
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