High-pressure large-current direct-current charger

A charging machine, high current technology, applied in the field of electric power, can solve the problems of formation, uneven voltage of charging modules, small output capacity, etc., to achieve the effects of low temperature rise, improved service life and reliability, and improved output power factor

CN102611171BInactive Publication Date: 2015-04-08株洲市达能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-04-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The embodiment of the invention discloses a high-pressure large-current direct-current charger, comprising an APFC (Active Power Factor Correction) rectification module, a charging module and a main control module, wherein the APFC rectification module largely improves an output power factor of a charging system, a DC / AC (Direct Current / Alternating Current) conversion module of the charging module is controlled by the main control module to be capable of realizing that an IGBT (Insulated Gate Bipolar Transistor) is opened under zero voltage and is closed under zero current, and switching power consumption is close to zero, thus the temperature rise of the IGBT of a power module in the DC / AC conversion module is very low, the service life of the direct-current charger is prolonged, and the reliability of the direct-current charger is improved; in addition, a high-frequency voltage transformer of a voltage-increasing module of the charging module converts alternating current output by the voltage increasing module to be charging current of a power storage battery by increasing voltage of positive and negative high-voltage pulses output by the DC / AC conversion module through the DC / AC conversion module of the charging module. Therefore, the high-pressure large-current direct-current charger of the embodiment of the invention has the characteristics of reliability and efficiency.
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Description

technical field

[0001] The invention relates to the field of electric power technology, in particular to a high-voltage and high-current DC charger. Background technique

[0002] The charger adopts high-frequency power supply technology and advanced intelligent dynamic adjustment charging technology, which has the characteristics of high charging efficiency, simple operation, light weight and small size.

[0003] The existing electric vehicle chargers at home and abroad generally use the following two methods to achieve high-voltage and high-current output:

[0004] One is to obtain high-voltage direct current by boosting and rectifying the alternating current of the power grid through a power frequency transformer, and charge the power battery through conversion, but this method has disadvantages such as small output capacity and small output current;

[0005] The other is to use several charging modules in series. This method has the hidden danger of uneven voltage of eac...

Examples

Embodiment Construction

[0029] An embodiment of the present invention provides a high-voltage and high-current DC charger.

[0030] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them.

[0031] A high-voltage and high-current DC charger in the embodiment of the present invention is described below, please refer to figure 1 , the high-voltage and high-current DC charger 100 in the embodiment of the present invention includes:

[0032] APFC rectification module 101, charging module 102 and main control module 103.

[0033] Wherein, the APFC rectification module 101 is used for performing APFC rectification on the input th...