Dual-battery power supply circuit

A power supply circuit and dual-battery technology, applied in terminal battery switching devices and other directions, can solve problems such as power failure of mobile terminals, and achieve the effect of avoiding damage

Inactive Publication Date: 2016-08-03
LEMOBILE INFORMATION TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a dual-battery power supply circuit, which solves the p

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Embodiment Construction

[0030] 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 of the embodiments of the present invention, not all of them. 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.

[0031] The qualifiers "first" and "second" used in the embodiments of the present invention and the claims are only used to describe the technical solution more clearly, and cannot be used to define the technical features.

[0032] figure 2 Shown is a schematic diagram of a dual-battery power supply circuit provided by an embodiment of the present invention. like figure 2 As shown, the dual battery power supply circuit is applied to the mobile ter...

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Abstract

One embodiment of the present invention provides a dual-battery power supply circuit. The dual-battery power supply circuit comprises a primary battery, a backup battery, a switch module, a PMOS tube and a resistor. The positive electrode of the primary battery is connected with the power supply terminal of a mobile terminal. The negative electrode of the primary battery is connected with a common ground. The negative terminal of the mobile terminal is connected with the common ground. The positive electrode of the backup battery is connected with the source electrode of the PMOS tube, and is connected with the grid electrode of the PMOS tube via the resistor. The negative electrode of the backup battery is connected with the common ground. The drain electrode of the PMOS tube is connected with the power supply terminal of the mobile terminal. One end of the switch module is connected with the grid electrode of the PMOS tube, and the other end of the switch module is connected with the common ground. When the primary battery does not supply the power, the switch module is switched on. When the primary battery supplies the power, the switch module is switched off. According to the embodiments of the present invention, the power-off problem of the mobile terminal during the battery replacement process of the power supply circuit in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a dual-battery power supply circuit. Background technique [0002] Existing handheld mobile devices (such as mobile phones, tablet computers, etc.) all need to be powered by their own batteries before they can be used, and generally only have one battery. In this way, when the network needs to be used for a long time, and the battery cannot be charged in time, the handheld mobile device can only be used by changing the detachable battery. However, during the process of replacing the removable battery, the device will be powered off and shut down, thus causing the handheld mobile device to be disconnected from the network, which will undoubtedly reduce the user experience. [0003] figure 1 Shown is a schematic diagram of a battery power supply circuit provided by the prior art. like figure 1 As shown (the thick solid line in the figure indicates the circuit throug...

Claims

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Application Information

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IPC IPC(8): H02J7/36
CPCH02J7/36
Inventor 纪成举肖亮
Owner LEMOBILE INFORMATION TECH BEIJING
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