Charger and charging method
A charging method and charger technology, which is applied in charging stations, battery circuit devices, electric vehicle charging technology, etc., can solve the problems of large volume and high cost of chargers, and achieve the effect of reducing cost and volume
Inactive Publication Date: 2020-05-22
LG ELECTRONICS CHINA RANDD CENT SHANGHAI CO LTD
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Problems solved by technology
[0006] An embodiment of the present invention provides a charger to solve the technical problems of large volume and high cost of existing chargers. The charger includes: a controller, an AC / DC converter, a DC / DC converter and a battery. The AC side of the AC / DC converter is connected to the AC power grid, and the DC / DC converter is connected in series between the DC side of the AC / DC converter and the battery; among them, the controller is connected with the AC / DC converter, DC / DC converter and The batteries are connected separately to obtain the first voltage output by the DC side of the AC / DC converter, the second voltage across the battery and the battery current, and adjust the DC / DC converter according to the first voltage, the second voltage and the battery current. Output Voltage and Output Current
[0007] The embodiment of the present invention also provides a charging method to solve the technical problems of large volume and high cost of existing chargers. The device includes: obtaining the first voltage output from the DC side of the AC / DC converter, and the second voltage and battery current; according to the first voltage, the second voltage and the battery current, the output voltage and output current of the DC / DC converter are controlled to charge the battery, wherein the DC / DC converter is connected in series to the direct current of the AC / DC converter between side and battery
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[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0017] An embodiment of the present invention provides a charger, figure 1 It is a schematic diagram of a charger provided in the embodiment of the present invention, such as figure 1 As shown, the charger includes: a controller, an AC / DC converter, a DC / DC converter and a battery, the AC side of the AC / DC converter is connected to the AC grid, and the DC / DC converter is connected in series with the AC / DC converter between the DC side of the AC / DC converter and the battery; wherein, the controller is connected to the AC / DC converter, the DC / DC converter and the batte...
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The invention discloses a charger and a charging method, the charger comprises a controller, an AC / DC converter, a DC / DC converter and a battery, the AC side of the AC / DC converter is connected with an AC power grid, and the DC / DC converter is connected in series between the DC side of the AC / DC converter and the battery; the controller is connected with the AC / DC converter, the DC / DC converter and the battery to obtain a first voltage output by the DC side of the AC / DC converter, a second voltage at the two ends of the battery and a battery current, and regulating the output voltage and the output current of the DC / DC converter according to the first voltage, the second voltage and the battery current. According to the invention, the purposes of reducing the size of the charger and reducing the cost of the charger are achieved.
Description
technical field [0001] The invention relates to the technical field of charging, in particular to a charger and a charging method. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] With the increasing energy shortage and environmental pollution, electric vehicles have gradually become popular in people's daily life due to their advantages of energy saving and environmental protection. Since the power source of electric vehicles is batteries, on-board charging technology has always been an important research topic in the field of electric vehicles. The principle of battery charging is to use the AC / DC module to convert AC power into DC power, and reduce the current harmonics at the input end to meet the standard, and then use the DC / DC module to control the current and voltage ...
Claims
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Login to View More IPC IPC(8): H02J7/10B60L53/20
CPCH02J7/06Y02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 张颖奇曹伟杰宋晋峰
Owner LG ELECTRONICS CHINA RANDD CENT SHANGHAI CO LTD