Vehicle-mounted charger main circuit of an integrated DC/DC converter and control over main circuit

A technology of DC converters and chargers, which is applied in the direction of efficient vehicle charging, converter types, electric vehicle charging technology, etc., can solve the problems of not being able to meet diversified needs, single function of battery charging, etc., and achieve volume reduction and reliability Enhanced performance and reduced costs

Active Publication Date: 2017-10-24
SHENZHEN WINLINE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing electrical integration solutions can only realize a single function of battery charging, and cannot meet the diverse needs of reality

Method used

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  • Vehicle-mounted charger main circuit of an integrated DC/DC converter and control over main circuit
  • Vehicle-mounted charger main circuit of an integrated DC/DC converter and control over main circuit
  • Vehicle-mounted charger main circuit of an integrated DC/DC converter and control over main circuit

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Experimental program
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Embodiment Construction

[0015] The invention adopts bidirectional CLLC control technology, and adds a secondary winding to the main transformer as a DC / DC output side winding to supply power to the storage battery and the load, so as to realize the electrical integration of OBC and DC / DC. The specific implementation circuit is as image 3 shown.

[0016] image 3 Topological device description: T1 is the main transformer integrated with OBC+DC / DC on-board, including three windings, the primary winding 1 is the mains input side, the output of the secondary winding 2 is connected to the vehicle power battery pack, and the output of the secondary winding 3 is connected to the vehicle Battery; C_bus is the large electrolytic capacitor of the busbar, Co_bat is the electrolytic capacitor of the power battery pack side, Cout is the electrolytic capacitor of the output vehicle battery side; Q1, Q2, Q3, and Q4 are N-type MOSFETs of the CLLC input side switch, Q5, Q6, Q7, and Q8 It is the full-bridge rectifi...

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Abstract

The invention provides a novel vehicle-mounted charger main circuit of an integrated DC/DC converter and a control loop of the main circuit. The DC/DC converter and a vehicle-mounted OBC are electrically integrated, and the two-way energy transmission of the vehicle-mounted OBC can be achieved; in addition, a synchronous rectification and pulse width modulation (PWM) wave generation control strategy is used on a storage battery side, so that the efficiency of a DC/DC function module is improved to the largest extent. The size of a whole machine is greatly reduced, the cost is obviously reduced, the power density is remarkably improved, and the reliability is further improved.

Description

technical field [0001] The present invention relates to an on-board charger, more specifically to an OBC on-board charger integrating a DC / DC converter, a main circuit and a control loop thereof. technical background [0002] In recent years, with the vigorous development of the electric vehicle industry, on-board electronic equipment has shown a trend of miniaturization, integration, and high power density. Especially the on-board OBC (On Board Charge) charger and on-board DC / DC, as the core components of electric energy conversion in the entire electric vehicle, urgently need miniaturization and high integration. [0003] figure 1 It is a physical integration solution for the currently commonly used vehicle-mounted OBC and vehicle-mounted DC / DC. Although this solution saves some structural parts and port wiring, it still requires a large number of electrical components, high cost, large volume, and low integration. Such as figure 1 As shown, the mains input enters the O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18H02M3/335
CPCH02M3/3353H02M3/33561B60L53/20B60L53/60B60L2210/10Y02T10/72Y02T10/70Y02T10/92Y02T90/12Y02T10/7072Y02T90/14
Inventor 张凯旋胡烨朱建国李晨光
Owner SHENZHEN WINLINE TECH
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