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Electric vehicle, power system and control method of electric vehicle

A technology of power system and control method, applied in electric vehicles, electric traction, electric devices, etc., can solve the problems of complex power battery power supply system, and achieve the effect of solving balance

Active Publication Date: 2015-01-07
庄森
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an electric vehicle, its power system and its control method, in order to solve the increasingly complicated problem of the power battery power supply system in the prior art

Method used

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  • Electric vehicle, power system and control method of electric vehicle
  • Electric vehicle, power system and control method of electric vehicle
  • Electric vehicle, power system and control method of electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 The electric vehicle power system shown includes a driving motor, and the stator winding of the driving motor is divided into two sets of branch windings insulated from each other, the first set of branch windings U1, V1, W1, the second set of branch windings U2, V2, W2; the first set of branch windings One set of branch windings is connected to the inverter N1, and the second set of branch windings is connected to the inverter N2; the inverter N1 is connected to the battery pack B1, and the inverter N2 is connected to the battery pack B2. The battery pack B1 and the battery pack B2 are electrically isolated and independent from each other. Therefore, the layout, installation, and configuration of the battery pack B1 and the battery pack B2 are very flexible.

[0033] According to the working mode of the motor, the above-mentioned inverter can also work in a rectifying state when the vehicle recovers energy. The motor can be a synchronous machine or an...

Embodiment 2

[0035] Such as figure 2 The electric vehicle power system shown includes a driving motor, and the stator winding of the driving motor is divided into two sets of branch windings insulated from each other, the first set of branch windings U1, V1, W1, the second set of branch windings U2, V2, W2; the first set of branch windings One set of branch windings is connected to the inverter N1, and the second set of branch windings is connected to the inverter N2; the inverter N1 is connected to the battery pack D1, and the inverter N2 is connected to the battery pack D2. The battery pack D1 and the battery pack D2 are electrically isolated and independent from each other. The battery pack is composed of several battery packs connected in series and parallel. Such as Figure 6 As shown, a battery pack includes two or more battery packs connected in series.

[0036] The only difference between embodiment 2 and embodiment 1 is that the battery pack is replaced by a battery pack, whic...

Embodiment 3

[0038] Such as image 3 As shown, similar to Embodiment 1, the only difference is that in Embodiment 3, the number of branch windings in a driving motor is expanded to n, and the corresponding inverters and battery packs are also expanded to n.

[0039] Embodiment 4 of electric vehicle and its power system

[0040] Such as Figure 4 As shown, similar to Embodiment 2, the only difference is that in Embodiment 4, the number of branch windings in a driving motor is expanded to n, and the corresponding inverters and battery packs are also expanded to n.

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Abstract

The invention relates to an electric vehicle, a power system and a control method of the electric vehicle. The power system of the electric vehicle comprises at least one driving motor; a stator winding of the driving motor is divided into at least two sets of mutually-insulated winding branches; a corresponding power supply system supplies power to each set of winding branches, wherein each power supply system comprises a corresponding cell unit and an inverter; all cell units are independent from each other. According to the electric vehicle, the power system and the control method of the electric vehicle, the power supply system is characterized in that the stator winding of the driving motor is composed of the plurality of sets of winding branches, each winding branch can independently gain power from the corresponding cell unit, and therefore, all cell units do to need electrical connection, and as a result, the problems of balancing between large serially-connected and parallel-connected cell packs, and high voltage can be completely solved.

Description

technical field [0001] The invention relates to an electric vehicle power system, an electric vehicle based on the power system and a control method. Background technique [0002] In the field of electric vehicles, power batteries are important energy storage components. In order to meet the power demand, a large number of power batteries are usually connected in series and parallel to form a power battery pack to provide power for the whole vehicle. [0003] Connecting power batteries in series brings many problems, such as: [0004] 1. The power batteries are connected in series and parallel. In order to ensure the service life and stability, each battery pack must be balanced. The larger the number of battery packs connected in series, the more complex the balancing circuit required, and the more management costs and resources consumed by the battery management system. [0005] 2. The more batteries connected in series, the higher the voltage, the more serious the insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18B60L3/04
CPCY02T10/70Y02T10/72
Inventor 庄森庄晨龚理禹茜
Owner 庄森
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