Regenerative braking control method and device

A technology of regenerative braking and electric braking, applied in control devices, control drives, electric braking systems, etc., can solve problems such as the battery can no longer absorb the braking power of the motor, the brake is damaged, the brake is overheated, etc., to improve flexibility. performance, extended service life, and improved accuracy

Active Publication Date: 2018-10-16
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] When the battery power is sufficient, the battery can no longer absorb the braking power of the motor, so that the motor can no longer perform braking. When braking, the electric vehicle can o

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  • Regenerative braking control method and device
  • Regenerative braking control method and device

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Embodiment Construction

[0074] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0075] Figure 1A is a system architecture diagram of an electric vehicle provided by an embodiment of the present disclosure, see Figure 1A , the system includes a braking demand and braking power distribution control unit, a high-voltage accessory system, an electric drive system, a power battery system, an active mechanical braking system, a driving intention recognition unit, and an environment and vehicle state recognition unit.

[0076] Wherein, the electric vehicle may be a pure electric vehicle or a hybrid vehicle, which is not limited in this embodiment.

[0077] Among them, the braking demand and braking power distribution control unit includes the vehicle controller, the vehicle control unit can communicate with the high...

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Abstract

The invention provides a regenerative braking control method and device and belongs to the technical field of electric vehicles. The regenerative braking control method comprises the steps of obtaining a braking total power according to a braking demand of the electric vehicle in the electric vehicle running process; obtaining a battery absorbed power of the electric vehicle; if the battery absorbed power does not exceed a preset threshold, obtaining a consumable power of an accessory energy-consuming facility of the electric vehicle; distributing the braking total power to a first electric braking power and a first mechanical braking power according to the braking total power and the consumable power of the accessory energy-consuming facility; carrying out regenerative braking according to the first electric braking power; and carrying out mechanical braking according to the first mechanical braking power. According to the regenerative braking control method and device, when a batterycannot recycle energy generated by braking of a motor, the energy generated by the braking of the motor can be recycled by using an original device, such as the accessory energy-consuming facility, of the electric vehicle so that the regenerative braking can also be carried out when the battery cannot recycle the energy; and therefore, the braking safety is enhanced.

Description

technical field [0001] The present disclosure relates to the technical field of electric vehicles, in particular to a regenerative braking control method and device Background technique [0002] Regenerative braking is one of the key technologies for reducing energy consumption of electric vehicles (including pure electric vehicles and hybrid vehicles). Regenerative braking refers to converting and storing the kinetic energy of electric vehicle motor braking during braking, instead of into useless thermal energy. [0003] At present, the battery of an electric vehicle can be used to absorb the braking power of the motor. For example, when the battery power is low, the battery can absorb the braking power. At this time, when the electric vehicle uses the motor for braking, it can The kinetic energy is converted into electrical energy, which is stored in the battery. [0004] In the process of realizing the present disclosure, the inventors found that the prior art has at le...

Claims

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Application Information

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IPC IPC(8): B60L7/10B60L15/20
CPCB60L7/10B60L15/2009B60L2210/10B60L2240/423B60L2240/54Y02T10/72
Inventor 杨成望杨志鹏张永生
Owner HUAWEI TECH CO LTD
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