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Charging circuit of lithium iron phosphate charging battery

A technology for rechargeable batteries and lithium iron phosphate, which is applied to battery circuit devices, circuit devices, current collectors, etc., and can solve problems such as high production costs, complicated charging circuits, and unsuitability for popularization and use.

Inactive Publication Date: 2011-08-03
杨福如
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional charging circuits are complicated and costly to produce, and are not suitable for promotion and use

Method used

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  • Charging circuit of lithium iron phosphate charging battery
  • Charging circuit of lithium iron phosphate charging battery

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Embodiment Construction

[0009] refer to figure 1 , a charging circuit for a lithium iron phosphate rechargeable battery of the present invention, comprising a USB interface 1 for introducing an external power supply, a positive terminal 2 for connecting to the positive pole of the lithium iron phosphate rechargeable battery, and a The negative terminal 3 connected to the negative pole, the ground connection GND of the USB interface 1 is connected to the negative terminal 3, and the first diode 4 and the first diode 4 are connected in series between the positive voltage connection VBUS of the USB interface 1 and the positive terminal 2. Two diodes 5, the anode of the first diode 4 is connected to the positive voltage connection VBUS, the cathode of the first diode 4 is connected to the anode of the second diode 5, the cathode of the second diode 5 is connected to the positive pole Terminal 2 is connected, one of the first diode 4 and the second diode 5 is a silicon diode, and the other is a germanium ...

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Abstract

The invention discloses a charging circuit of a lithium iron phosphate charging battery, comprising a USB (universal serial bus) interface, a positive wiring terminal and a negative wiring terminal, wherein the USB interface is used for introducing an external power supply; a grounding line GND of the USB interface is connected with the negative wiring terminal; a first diode and a second diode are arranged between a positive voltage wiring VBUS of the USB interface and the positive wiring terminal in series; and one of the first diode and the second diode is a silicon diode, and the other one of the first diode and the second diode is a germanium diode. In the charging circuit, by a simple circuit, not only is the problem of voltage matching between the USB interface and the charging battery solved, but also the necessary charging control function is also realized, the circuit is simple, the manufacturing cost is low, and various existing complex charging circuit structures can be effectively replaced. In addition, the lithium iron phosphate charging battery based on the charging circuit disclosed by the invention also has the advantages that convenience is achieved and the use range is wide.

Description

technical field [0001] The invention relates to a battery charging circuit, in particular to a charging circuit for a lithium iron phosphate rechargeable battery. Background technique [0002] Compared with traditional lead-acid batteries, nickel-cadmium batteries, and nickel-hydrogen batteries, lithium iron phosphate rechargeable batteries have the advantages of safety, high stability, environmental protection, and low price, so their applications will become more and more extensive, especially as With the proposal of various battery usage schemes, it will also become possible for this lithium iron phosphate rechargeable battery with an output voltage of about 3.2V to replace the traditional disposable battery with an output voltage of about 1.5V. With the increasing use of lithium iron phosphate batteries, how to charge them conveniently has become a problem that must be solved. Traditional charging circuits are complex and costly to manufacture, and are not suitable for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 刘喜信吕活胜吴伯财
Owner 杨福如
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