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Electric driving system, power assembly, heating method and electric vehicle

A technology of electric drive system and power battery pack, applied in electric vehicles, vehicle components, vehicle energy storage, etc., can solve problems such as increasing cost and occupying space

Active Publication Date: 2022-02-25
HUAWEI DIGITAL POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this heating method needs to add an additional heating device, which takes up space and increases the cost

Method used

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  • Electric driving system, power assembly, heating method and electric vehicle
  • Electric driving system, power assembly, heating method and electric vehicle
  • Electric driving system, power assembly, heating method and electric vehicle

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Embodiment Construction

[0079] In order for those skilled in the art to better understand the technical solutions provided by the embodiments of the present application, the working principle of the electric drive system of the electric vehicle is firstly introduced below.

[0080] see figure 2 , which is a schematic diagram of a schematic electric drive system of an electric vehicle provided in the present application.

[0081] The illustrated electric drive system includes a power battery pack 10 , a high-voltage distribution box 20 , a motor controller (Motor Control Unit, MCU) 30 , a motor 40 , an on-board charger (OBC) 50 and a DC fast charging circuit 60 .

[0082] Among them, the power battery pack 10 is used to provide high-voltage direct current, and the high-voltage direct current provided by the power battery pack 10 is converted into alternating current through the high-voltage power distribution box 20 and the motor controller 30, and provided to the motor 40 to drive the electric vehicle...

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Abstract

The invention discloses an electric driving system, a power assembly, a heating method and an electric vehicle, and relates to the technical field of electric vehicles. The electric driving system comprises an inverter circuit, a direct current-direct current conversion circuit and a controller. The input end of the inverter circuit is connected with the input end of the electric driving system, and the output end of the inverter circuit is connected with a three-phase motor winding of the electrically excited synchronous motor; the input end of the direct current-direct current conversion circuit is connected with the input end of the electric driving system, and the output end of the direct current-direct current conversion circuit is connected with an excitation winding of the electrically excited synchronous motor; the inverter circuit converts the direct current into three-phase current and provides the three-phase current to a three-phase motor winding; the direct current-direct current conversion circuit performs direct current conversion on the direct current and then provides the direct current to the excitation winding; the controller is used for controlling the inverter circuit and the DC-DC conversion circuit, so that the temperature of the power battery pack is larger than or equal to a first temperature threshold value. According to the scheme, a heating device does not need to be arranged when the power battery pack is heated, cost is reduced, and space is saved.

Description

technical field [0001] The present application relates to the technical field of electric vehicles, in particular to an electric drive system, a power assembly, a heating method and an electric vehicle. Background technique [0002] With the aggravation of energy shortage and environmental pollution in modern society, electric vehicles, as new energy vehicles, have received widespread attention from all walks of life. The electric vehicle is powered by a power battery pack, and the electric motor converts the electric energy into mechanical energy to drive the electric vehicle. As electric vehicles are being deployed in large numbers, many electric vehicles are being used in areas with cold winters, or areas that are cold at all times. In a low temperature environment, the viscosity of the electrolyte in the power battery pack increases, which reduces the discharge performance of the power battery pack. Therefore, the power battery pack needs to have efficient low-temperat...

Claims

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Application Information

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IPC IPC(8): B60L58/27
CPCB60L58/27B60L2240/545B60L15/20B60L50/60Y02T10/72B60L15/025B60L2220/14B60L50/51B60L2210/10B60L2210/40B60L58/25B60L3/0046B60L3/0061
Inventor 李浩杰毋超强蔺梦轩
Owner HUAWEI DIGITAL POWER TECH CO LTD
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