charging device
A technology for charging devices and rechargeable batteries, which is applied to circuit devices, battery circuit devices, current collectors, etc., can solve the problems of low charging efficiency and inability to effectively use USB power, and achieve the effects of reducing charging time and improving charging efficiency
Active Publication Date: 2016-03-30
HONOR DEVICE CO LTD
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Problems solved by technology
However, since the output voltage and output current of the USB interface of the PC are limited to 5V and 500mA respectively, such as figure 1 As shown, the ordinate Ic in the figure is the charging current, and the abscissa t is the charging time. Generally, the charging process is constant current charging first, and then constant voltage charging. The constant current charging is the fundamental factor that determines the length of the charging time, and the constant The process of streaming charging can not effectively use the power output by USB, so the charging efficiency is low
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[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0018] Such as figure 2 As shown, the embodiment of the present invention provides a charging device, including:
[0019] A DC / DC converter (DirectCurrent / DirectCurrent, DC / DC) connected to the output of the power supply; a current regulation unit U3 connected between the DC / DC and the rechargeable battery bat; a current regulation unit U3 connected between the current regulation unit U3 and the rechargeable battery bat Voltage feedback unit U0; the voltage feedb...
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The invention discloses a charging device, and relates to the technical field of power sources. Charging currents are adjusted according to voltages of a rechargeable battery, electric energy output from an USB is fully utilized, and charging efficiency is improved. The charging device comprises a DC / DC connected to a power output end, a current adjusting unit connected between the DC / DC and the rechargeable battery, and a voltage feedback unit connected between the current adjusting unit and the rechargeable battery. The voltage feedback unit is used for adjusting output voltages of the DC / DC according to voltages of the rechargeable battery, and the difference value between the output voltages of the DC / DC and the voltages of the rechargeable battery remains unchanged. The current adjusting unit is used for providing charging currents for the rechargeable battery and adjusting the charging currents according to the output voltages of the DC / DC, and therefore the charging currents are made to be equal to the ratio of output power of the power output end and the output voltages of the DC / DC.
Description
technical field [0001] The invention relates to the technical field of power supplies, in particular to a charging device. Background technique [0002] Currently, portable terminals that support charging generally support battery charging through a Universal Serial Bus (USB) interface of a personal computer (Personal Computer, PC), such as a mobile phone. However, since the output voltage and output current of the USB interface of the PC are limited to 5V and 500mA respectively, such as figure 1 As shown, the ordinate Ic in the figure is the charging current, and the abscissa t is the charging time. Generally, the charging process is constant current charging first, and then constant voltage charging. The constant current charging is the fundamental factor that determines the length of the charging time, and the constant The process of streaming charging does not effectively utilize the power output from the USB, so the charging efficiency is low. Contents of the inventi...
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IPC IPC(8): H02J7/00
Inventor 罗汝林
Owner HONOR DEVICE CO LTD