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Energy conversion device and vehicle

An energy conversion device and bridge arm technology, applied in the field of vehicles, can solve problems such as poor compatibility, achieve the effect of good compatibility and reduce the cost of the whole vehicle

Active Publication Date: 2022-08-09
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All in all, the compatibility of these DC charging methods is relatively poor

Method used

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  • Energy conversion device and vehicle
  • Energy conversion device and vehicle
  • Energy conversion device and vehicle

Examples

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Embodiment Construction

[0028] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, but not to limit the present disclosure.

[0029] figure 1 A schematic structural diagram of an energy conversion device according to an embodiment of the present disclosure is shown. like figure 1As shown, the energy conversion device includes an AC motor 11, a bidirectional PWM inverter 12 and a switch module, wherein: the AC motor 11 includes x sets of windings, and all phases and windings of each set of windings can be controlled by the motor vector. The AC motor is running, and each set of windings is staggered by a certain electrical angle θ, where 2≤x, 0≤θ<360; the bidirectional PWM inverter 12 includes x groups of bridge arms, and each group of bridge arms is in phase with one of the sets of windings...

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Abstract

The present disclosure relates to an energy conversion device and a vehicle, which are compatible with various DC charging and discharging methods and have low cost. An energy conversion device includes an alternating current motor, a bidirectional PWM inverter and a switch module, wherein: the alternating current motor includes x sets of windings, and the alternating current motor can be operated by adopting the motor vector control of all phases and windings of each set of windings. The sets of windings are staggered by a certain electrical angle θ; the bidirectional PWM inverter includes x groups of bridge arms, each set of bridge arms is connected to one set of windings, the number of bridge arms of each set of bridge arms and the phase of the windings connected to it. The switch module includes a first switch sub-module and a second switch sub-module, wherein the first switch sub-module controls the electrical connection between the busbars of one group of bridge arms and the DC charging and discharging ports, and the second switch sub-module The electrical connection between each group of bridge arms is controlled; at least two sets of windings in the x sets of windings and their corresponding bridge arm groups together form a circuit for charging and discharging the power battery.

Description

technical field [0001] The present disclosure relates to the field of vehicles, and in particular, to an energy conversion device and a vehicle. Background technique [0002] At present, the DC charging of power batteries is generally divided into two types: direct charging and boost charging. Direct charging means that the positive and negative poles of the charging pile are directly connected to the positive and negative busbars of the power battery through a contactor or relay to directly charge the battery without a boost or buck circuit in the middle. Boost charging refers to adding a buck-boost DC / DC bridge circuit between the charging pile and the positive and negative busbars of the power battery. [0003] For direct charging, when the maximum output voltage of the charging pile is lower than the voltage of the power battery, the charging pile cannot charge the power battery. For boost charging, since a DC / DC bridge circuit and corresponding control and detection c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L53/12B60L53/122H02P21/00H02P29/64H02M7/72
CPCB60L53/12B60L53/122H02P21/0003H02P29/64H02M7/72Y02T10/64
Inventor 潘华李吉成张宇昕雷野黄日
Owner BYD CO LTD
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