Energy conversion device, power system and vehicle
An energy conversion device and power battery technology, applied in the electronic field, can solve the problems of complex structure, low integration, large heat loss, etc., and achieve the effect of solving complex structure, high degree of component reuse, and reducing system cost
Active Publication Date: 2021-01-15
BYD CO LTD
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Problems solved by technology
[0006] The purpose of this application is to provide an energy conversion device, a power system, and a vehicle, aiming to solve the problems of complex structure, low integration, large volume, high cost, and heat generated during capacitor pre-charging in the existing overall circuit of the motor drive and charging system. big loss problem
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[0030] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0031] The implementation of the present application is described in detail below in conjunction with specific drawings:
[0032] figure 1 The module structure of the capacitor voltage precharging circuit provided by the first embodiment of the present application is shown. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:
[0033] like figure 1 As shown, the energy conversion device provided by the embodiment of the present application includes a motor coil 11 , a bridge arm converter 12 , a bidirect...
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The invention belongs to the technical field of electronics, and particularly relates to an energy conversion device, a power system and a vehicle. According to the application, the energy conversiondevice which comprises the motor coil, the bridge arm converter, the bidirectional bridge arm, the first capacitor, the second capacitor and the bidirectional DC module and integrates driving and charging functions is adopted, so that the energy conversion device can work in a driving mode, a DC charging mode and an AC charging mode; the capacitor reuse purpose is achieved while motor driving andbattery charging of the vehicle are conducted through the same system, the component reuse degree is high, the system integration degree is high, the structure is simple, and therefore the system costis reduced, the system size is reduced, voltage at the two ends of the first capacitor can be pre-charged. The problems that an existing motor driving and charging system overall circuit is complex in structure, low in integration level, large in size, high in cost and large in heat loss during capacitor pre-charging are solved.
Description
technical field [0001] The present application belongs to the field of electronic technology, and in particular relates to an energy conversion device, a power system and a vehicle. Background technique [0002] With the development and rapid popularization of electric vehicles, motor control and battery charging of electric vehicles are becoming more and more important. At present, the motor drive of existing electric vehicles, the AC charging of the battery, and the DC charging of the battery are all independent, and in order to ensure the charging power or drive normally, it is usually necessary to connect the drive circuit, DC charging circuit and AC charging circuit. Set a capacitor in. [0003] However, although the above method can effectively guarantee the normal operation of the motor drive and battery charging of the vehicle, since the motor drive circuit and the battery charging circuit in the above method are independent and irrelevant to each other, and each ci...
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IPC IPC(8): B60L53/22B60L53/24H02J7/02H02J7/00
CPCB60L53/22B60L53/24H02J7/02Y02T10/70Y02T10/7072Y02T90/14
Inventor 刘伟冬王超王兴辉
Owner BYD CO LTD