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A kind of control circuit and control method of POS machine backup battery

A backup battery and POS machine technology, applied in the direction of circuit devices, electrical components, emergency power arrangements, etc., can solve the problems of increasing the use of the internal backup battery V2 and affecting the service life of the internal backup battery V2, so as to avoid the POS machine Effects of maintenance, improvement of service life, and reduction of frequency of use

Active Publication Date: 2019-07-26
FUJIAN LANDI COMML EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual discharge process, when V1 is discharged, if the voltage value of V1 is lower than the voltage value of V2, the control circuit will switch to V2 discharge; after V2 discharges for a period of time, if the voltage value of V2 is lower than the voltage value of V1 In this case, V1 will be switched again to discharge, which will cause high-frequency repeated switching and discharge between V1 and V2, which will inevitably increase the high use of the internal backup battery V2 and greatly affect the service life of the internal backup battery V2.

Method used

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  • A kind of control circuit and control method of POS machine backup battery
  • A kind of control circuit and control method of POS machine backup battery
  • A kind of control circuit and control method of POS machine backup battery

Examples

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Embodiment 1

[0073] Please refer to figure 2 , Embodiment 1 of the present invention is:

[0074] A control circuit of a POS machine backup battery, the POS machine backup battery includes an internal backup battery V2 and an external backup battery V1, the internal backup battery and the external backup battery are respectively for POS machine load power supply, and the control circuit includes a switching unit , the internal backup battery and the external backup battery are respectively connected to the load of the POS machine through a switching unit, and the switching unit is used to switch the power supply state of the POS machine load by the external backup battery when the external backup battery is lower than a preset voltage value The POS machine load is powered by the internal backup battery.

[0075] The switching unit includes a first diode D1, a second diode D2 and a first MOS transistor Q1, the anode of the external backup battery is connected to the anode of the first dio...

Embodiment 2

[0078] Please refer to image 3 , the second embodiment of the present invention is:

[0079] The difference between Embodiment 2 and Embodiment 1 is that the first comparator U1 is added on the basis of Embodiment 1. The first comparator compares the voltage value of the external backup battery and the reference power supply. If the voltage value of the external backup battery is greater than the reference power supply The voltage value of the power supply, the first comparator outputs a high level, so that the first MOS tube is turned off, and the external backup battery is used to supply power to the load of the POS machine, which can ensure that the power is completely supplied by the external backup battery within the preset voltage range until the external backup battery The voltage value of the backup battery is lower than the voltage value of the reference power supply before switching to the internal backup battery for power supply. The selection range of the first MO...

Embodiment 3

[0080] Please refer to Figure 4 , Embodiment three of the present invention is:

[0081] The difference between the third embodiment and the first embodiment is that on the basis of the first embodiment, the first diode and the second diode are changed to the second electronic switch U4, if the voltage of the external backup battery and the voltage of the internal backup battery If the difference is greater than the turn-on voltage value of the second MOS transistor Q2, the second MOS transistor will be turned off, and the second electronic switch will turn on the external backup battery to supply power to the load of the POS machine, which can ensure that within the preset voltage range, it is completely powered by the external Backup battery power supply, until the difference between the voltage of the external backup battery and the internal backup battery is lower than the conduction voltage value of the second MOS tube, it is switched to the internal backup battery power...

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Abstract

A control circuit for spare batteries of a POS machine and a control method therefor, wherein the spare batteries comprise an internal spare battery and an external spare battery; the control circuit comprises a switching unit; the internal spare battery and the external spare battery are separately connected to the POS machine by means of the switching unit; and the switching unit is used for switching from the power supply state for a POS machine load by the external spare battery to the power supply state for the POS machine load by the internal spare battery when the external spare battery is lower than a preset voltage value. For existing spare batteries of a POS machine, a switching unit is added for control, so that only when the external spare battery is lower than the preset voltage value is the power supply state switched to the power supply for the POS machine load by the internal spare battery, thereby reducing the usage frequency of the internal spare battery, and avoiding the maintenance of the whole POS machine due to the internal spare battery being out of power.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a control circuit and a control method for a backup battery of a POS machine. Background technique [0002] In order to ensure that the POS machine can maintain normal operation in real time, the current POS machine backup battery usually has at least an external backup battery V1 and an internal backup battery V2 to power the POS machine independently. Once the internal backup battery V2 is damaged, it is inconvenient to replace, and the device needs to be returned to the factory for complicated replacement operations. [0003] Furthermore, the control circuit of the current POS machine backup battery is as follows: figure 1 As shown, the first diode D1 and the second diode D2 are used to select the conduction of the external backup battery V1 and the internal backup battery V2, and a resistor R is connected in series with V2, so that the voltage at the D2 terminal is lower t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/06
CPCH02J9/061H02J9/068Y02B70/30Y04S20/20
Inventor 刘宗铭江健琦郑奇瑞
Owner FUJIAN LANDI COMML EQUIP CO LTD