CN110535230A - Electric power controller and terminal device - Google Patents

Abstract

The invention discloses a power management device and terminal equipment, wherein the power management device includes a switching signal generation unit and a single-pole double-throw switch. The switching signal generation unit includes a first input terminal, a second input terminal, a third input terminal and a signal output terminal, the first input terminal is electrically connected to the first power supply input terminal; the single-pole double-throw switch includes a first access terminal, a second The access terminal, the control terminal and the output terminal are electrically connected to the second input terminal of the second power supply, and the output terminal is electrically connected to the output terminal of the power supply. When the control terminal receives the first switch signal, the first access terminal and the connection output terminal are closed; when the control terminal receives the second switch signal, the second access terminal and the connection output terminal are closed. The present invention uses the first power supply only when the voltage at the input terminal of the first power supply is greater than or equal to the preset reference voltage value and the voltage at the input terminal of the second power supply is lower than the preset reference voltage value, so that the first power supply can be well protected, Extend its service life.

Description

Power management devices and terminal equipment

technical field

The invention belongs to the technical field of power management, and in particular relates to a power management device and terminal equipment.

Background technique

A rechargeable battery is often provided in the terminal device. When the power of the terminal device is insufficient, it needs to be charged. Frequent charging will reduce the service life of the rechargeable battery. In addition, when the user charges the terminal device, the rechargeable battery of the terminal device is still in a working state, which also affects the service life of the rechargeable battery.

Contents of the invention

The technical problem to be solved by the present invention is to provide a power management device and a terminal device in order to overcome the defect that the power management mode in the prior art affects battery life.

The present invention solves the above technical problems through the following technical solutions:

The present invention provides a power management device. The power management device is provided with a first power input terminal, a second power input terminal, a reference voltage input terminal, and a power output terminal; the power management device includes a switching signal generation unit and a single-pole double-throw switch;

The switching signal generation unit includes a first input terminal, a second input terminal, a third input terminal and a signal output terminal, the first input terminal is electrically connected to the first power supply input terminal, the second input terminal is electrically connected to the second power supply input terminal, The third input terminal is electrically connected to the reference voltage input terminal;

The SPDT switch includes a first access terminal, a second access terminal, a control terminal and an output terminal, the first access terminal is electrically connected to the first power input terminal, and the second access terminal is electrically connected to the second power input terminal. connection, the control end is electrically connected to the signal output end, and the connection output end is electrically connected to the power output end;

If the voltage at the input terminal of the first power supply is greater than or equal to the preset reference voltage value and the voltage at the input terminal of the second power supply is lower than the preset reference voltage value, the switching signal generation unit is used to output the first switching signal at the signal output terminal, otherwise, switch The signal generation unit is used to output the second switching signal on the signal output terminal;

When the control terminal receives the first switch signal, the first access terminal and the connection output terminal are closed; when the control terminal receives the second switch signal, the second access terminal and the connection output terminal are closed.

Preferably, the switching signal generation unit includes a first comparator, a second comparator, an inverter, and a two-input AND gate;

The positive input terminal of the first comparator is electrically connected to the first input terminal, the positive input terminal of the second comparator is electrically connected to the second input terminal, and the negative input terminal of the first comparator is connected to the negative input terminal of the second comparator. The input terminals are respectively electrically connected to the third input terminals;

The output terminal of the second comparator is electrically connected with the input terminal of the inverter;

The output terminal of the first comparator and the output terminal of the inverter are respectively electrically connected to the two input terminals of the two-input AND gate, and the output terminal of the two-input AND gate is electrically connected to the signal output terminal;

The first switching signal is at high level, and the second switching signal is at low level.

Preferably, the reference voltage input terminal is connected to a voltage of 3.3 volts.

Preferably, the first power input terminal is used for electrical connection with the voltage output terminal of a battery, and the second power supply input terminal is used for electrical connection with the voltage output terminal of an adapter.

The present invention also provides a terminal device. The terminal device includes a power consumption unit and the power management device of the present invention. The power consumption unit is electrically connected to an output end of a power supply to obtain electric energy from the power management device.

Preferably, the terminal equipment also includes a battery and an adapter;

The first power input end is electrically connected to the voltage output end of the battery, and the second power input end is electrically connected to the voltage output end of the adapter.

Preferably, the battery is a rechargeable battery.

Preferably, the terminal device is a mobile phone or a mobile computer or a tablet computer.

Preferably, the terminal device is a terminal device of the Internet of Things.

Preferably, the terminal device is a POS (point of sale, sales terminal) machine or a payment code recognition device.

The positive progress effect of the present invention is that: the present invention only uses the first power supply to supply power when the voltage at the input terminal of the first power supply is greater than or equal to the preset reference voltage value and the voltage at the input terminal of the second power supply is lower than the preset reference voltage value, which can The first power supply is well protected to prolong its service life.

Description of drawings

FIG. 1 is a schematic structural diagram of a power management device according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a terminal device according to a preferred embodiment of the present invention.

Detailed ways

The present invention will be further described below by means of a preferred embodiment, but the present invention is not limited to the scope of the described embodiment.

This embodiment provides a power management device. Referring to FIG. 1 , the power management device 1 is provided with a first power input terminal 101 , a second power input terminal 102 , a reference voltage input terminal 103 , and a power output terminal 104 . The first power supply input terminal 101 is electrically connected to the first power supply 2 for obtaining electric energy from the first power supply 2 . The second power supply input terminal 102 is electrically connected to the second power supply 3 for obtaining electric energy from the second power supply 3 . The reference voltage input terminal 103 is electrically connected to the reference voltage 4 for obtaining a reference voltage value. The power output terminal 104 is used to output electric energy to the outside.

The power management device 1 includes a switching signal generating unit 11 and a single pole double throw switch 12 .

The switching signal generating unit 11 includes a first input terminal 115 , a second input terminal 116 , a third input terminal 117 and a signal output terminal 118 . The first input terminal 115 is electrically connected to the first power input terminal 101 , the second input terminal 116 is electrically connected to the second power input terminal 102 , and the third input terminal 117 is electrically connected to the reference voltage input terminal 103 .

The SPDT switch 12 includes a first input terminal 121 , a second input terminal 122 , a control terminal 123 and an output terminal 124 . The first access terminal 121 is electrically connected to the first power input terminal 101, the second access terminal 122 is electrically connected to the second power input terminal 102, the control terminal 123 is electrically connected to the signal output terminal 118, and the output terminal 124 is electrically connected to the power output Terminal 104 is electrically connected.

If the voltage at the input terminal of the first power supply is greater than or equal to the preset reference voltage value and the voltage at the input terminal of the second power supply is lower than the preset reference voltage value, the switching signal generation unit is used to output the first switching signal at the signal output terminal, otherwise, switch The signal generation unit is used to output the second switching signal at the signal output.

When the control terminal receives the first switch signal, the first input terminal and the output terminal are closed, and the power output terminal 104 outputs electric energy from the first power supply. When the control terminal receives the second switching signal, the second input terminal and the output terminal are closed, and the power output terminal 104 outputs electric energy from the second power supply.

As an optional implementation manner, the switching signal generating unit 11 includes a first comparator 111 , a second comparator 112 , an inverter 113 , and a two-input AND gate 114 . The positive input end of the first comparator is electrically connected to the first input end 115 of the switching signal generation unit 11, the positive input end of the second comparator is electrically connected to the second input end 116 of the switching signal generation unit 11, and the first The inverting input terminal of the comparator and the inverting input terminal of the second comparator are respectively electrically connected to the third input terminal 117 of the switching signal generating unit 11 . The output terminal of the second comparator is electrically connected with the input terminal of the inverter. The output terminal of the first comparator and the output terminal of the inverter are respectively electrically connected to the two input terminals of the two-input AND gate, and the output terminal of the two-input AND gate is electrically connected to the signal output terminal 118 of the switching signal generating unit 11 . The first switching signal is at high level, and the second switching signal is at low level. The preset reference voltage value can be reasonably set according to specific application scenarios.

Table 1

The voltage at the first power supply input The voltage at the input of the second power supply Signal output level Greater than or equal to the reference voltage Greater than or equal to the reference voltage low level Greater than or equal to the reference voltage less than the reference voltage high level less than the reference voltage Greater than or equal to the reference voltage low level less than the reference voltage less than the reference voltage low level

Table 1 shows the level status of the signal output terminal under different magnitude relationships between the voltage at the input terminal of the first power supply, the voltage at the input terminal of the second power supply and the reference voltage.

In an optional embodiment, the first power source is a rechargeable battery, and the second power source is an adapter. The reference voltage is 3.3 volts. Only when the output voltage of the rechargeable battery is greater than or equal to 3.3 volts, and the output voltage of the adapter is less than 3.3 volts, it is powered by the rechargeable battery. As long as the adapter is connected to the 220-volt mains (after the adapter is connected to the 220-volt mains, the output voltage is greater than or equal to 3.3 volts), the adapter supplies power to the outside. In this way, as long as the user connects the adapter to the mains, the rechargeable battery can stop supplying power to the outside, reducing the discharge of the rechargeable battery and increasing the service life of the rechargeable battery. Alternatively, when the output voltage of the rechargeable battery is less than 3.3 volts, the rechargeable battery is stopped to supply power to the outside, so as to avoid excessive discharge of the rechargeable battery and prolong the service life of the rechargeable battery.

This embodiment also provides a terminal device. Referring to FIG. 2, the terminal device includes a power consumption unit 7 and the power management device 1 of this embodiment. The power consumption unit 7 is electrically connected to the power output terminal 104 to obtain electrical energy.

The terminal device also includes a battery 5 and an adapter 6 . The first power input end 101 is electrically connected to the voltage output end of the battery 5 , and the second power input end 102 is electrically connected to the voltage output end of the adapter 6 . The reference voltage input terminal 103 is electrically connected to the reference voltage 4 . As an optional implementation, the battery is a rechargeable battery.

During the use of the terminal device, if the output voltage of the rechargeable battery is lower than the reference voltage, it indicates that the power of the rechargeable battery is insufficient, and the first input terminal 121 of the SPDT switch 12 is disconnected from the output terminal 124, The second input terminal 122 of the SPDT switch 12 communicates with the output terminal 124 . At this time, the power consumption unit 7 is no longer powered by the rechargeable battery, which can effectively avoid excessive discharge of the rechargeable battery, and is beneficial to prolong the service life of the rechargeable battery.

During the use of the terminal equipment, if the user connects the adapter 6 to the 220-volt mains, the adapter 6 outputs a voltage that is available for the normal operation of the power unit 7, and the voltage is greater than or equal to the reference voltage, and the single-pole double-throw switch 12 The second input terminal 122 of the single pole double throw switch 12 is connected to the output terminal 124 , and the first input terminal 121 of the SPDT switch 12 is disconnected from the output terminal 124 . At this time, the power consumption unit 7 is powered by the adapter 6 . In this way, unnecessary discharge of the rechargeable battery can be avoided, and the service life of the rechargeable battery can be improved.

As an optional implementation manner, the terminal device is a mobile phone or a mobile computer or a tablet computer.

In an optional implementation manner, the terminal device is a terminal device of the Internet of Things.

In an optional implementation manner, the terminal device is a POS machine. The POS machine is provided with a battery, and the POS machine is also connected to the mains through an adapter.

In an optional implementation manner, the terminal device is a payment code recognition device. The payment code identification device is provided with a battery, and the payment code identification device is also connected to the mains through an adapter. The payment code recognition equipment is installed in supermarkets, shopping malls and other places, and is used to recognize the payment code displayed by consumers to realize payment collection.

Although the specific implementation of the present invention has been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (10)

1. a kind of electric power controller, which is characterized in that the electric power controller is provided with the first power input, the second electricity Source input terminal, reference voltage input, power output end；The electric power controller includes switching signal generation unit, hilted broadsword Commutator；

The switching signal generation unit includes first input end, the second input terminal, third input terminal and signal output end, described First input end is electrically connected with first power input, and second input terminal is electrically connected with the second source input terminal It connects, the third input terminal is electrically connected with the reference voltage input；

The single-pole double-throw switch (SPDT) includes the first incoming end, the second incoming end, control terminal and picks out end, first incoming end and The first power input electrical connection, second incoming end are electrically connected with the second source input terminal, the control terminal It is electrically connected with the signal output end, the end that picks out is electrically connected with the power output end；

If the voltage of first power input is more than or equal to preset reference voltage value and the second source input terminal Voltage be lower than the preset reference voltage value, then the switching signal generation unit on the signal output end for exporting First switching signal, otherwise, the switching signal generation unit on the signal output end for exporting the second switching signal；

When the control terminal receives first switching signal, first incoming end and the end that picks out are closed；Work as institute When stating control terminal and receiving second switching signal, second incoming end and described end closure is picked out.

2. electric power controller as described in claim 1, which is characterized in that the switching signal generation unit includes the first ratio Compared with device, the second comparator, phase inverter, two inputs and door；

The positive input of the first comparator is electrically connected with the first input end, the positive input of second comparator End is electrically connected with second input terminal, the reversed input of the reverse input end of the first comparator and second comparator End is electrically connected with the third input terminal respectively；

The output end of second comparator is electrically connected with the input terminal of the phase inverter；

Two inputs with two input and door respectively of the output end of the output end of the first comparator and the phase inverter End electrical connection, two input are electrically connected with the output end of door with the signal output end；

First switching signal is high level, and second switching signal is low level.

3. electric power controller as described in claim 1, which is characterized in that the reference voltage input connects 3.3 volts Voltage.

4. the electric power controller as described in any one of claim 1-3, which is characterized in that first power input For being electrically connected with the voltage output end of a battery, the second source input terminal is used for and the voltage output end of adapter electricity Connection.

5. a kind of terminal device, which is characterized in that the terminal device includes any one in power unit and such as claim 1-4 Electric power controller described in, the power unit are electrically connected to obtain from the electric power controller with the power output end Take electric energy.

6. terminal device as claimed in claim 5, which is characterized in that the terminal device further includes battery and adapter；

First power input is electrically connected with the voltage output end of the battery, and the second source input terminal is fitted with described The voltage output end of orchestration is electrically connected.

7. terminal device as claimed in claim 6, which is characterized in that the battery is rechargeable battery.

8. terminal device as claimed in claim 5, which is characterized in that the terminal device is mobile phone or removable computer or plate Computer.

9. terminal device as claimed in claim 5, which is characterized in that the terminal device is the terminal device of Internet of Things.

10. terminal device as claimed in claim 5, which is characterized in that the terminal device is that POS machine or payment code identify equipment.