CN211320983U - Power supply device - Google Patents
Power supply device Download PDFInfo
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- CN211320983U CN211320983U CN202020177294.6U CN202020177294U CN211320983U CN 211320983 U CN211320983 U CN 211320983U CN 202020177294 U CN202020177294 U CN 202020177294U CN 211320983 U CN211320983 U CN 211320983U
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- power supply
- battery
- control circuit
- supply device
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Abstract
The utility model relates to a power supply device, which comprises at least two battery boxes, a power output interface, at least two controllable switches, at least two voltage detection circuits and a control circuit; the negative electrodes of the battery boxes are connected in parallel and connected with the negative electrode of the power output interface; each controllable switch is correspondingly connected between the anode of one battery box and the anode of the power output interface in series; the control end of each controllable switch is connected with the control circuit; the input end of each voltage detection circuit is correspondingly connected with the anode of one battery box, and the output end of each voltage detection circuit is connected with the control circuit. The utility model discloses a set up two at least battery casees, form the backup of redundant power supply, the switching of control circuit control battery case power supply has improved stability, reliability and the duration of battery supply voltage output, and can carry out the battery and change under the prerequisite of uninterrupted power consumption electronic equipment power supply, has improved the convenience of using.
Description
Technical Field
The utility model belongs to the technical field of the power supply, concretely relates to power supply unit.
Background
In some applications (e.g., outdoor applications, etc.), the electronic device may be powered by batteries only. The existing battery power supply often has the problems of limited battery capacity, the need of suspending the use of electronic equipment when replacing the battery, unstable battery power supply voltage and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem and provide a power supply unit.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a power supply device comprises at least two battery boxes, a power supply output interface, at least two controllable switches, at least two voltage detection circuits and a control circuit, wherein the control circuit is used for controlling the on-off of the controllable switches according to voltage detection values output by the voltage detection circuits;
the negative electrodes of the battery boxes are connected in parallel and connected with the negative electrode of the power output interface;
each controllable switch is correspondingly connected between the positive electrode of one battery box and the positive electrode of the power output interface in series;
the control end of each controllable switch is connected with the control circuit;
the input end of each voltage detection circuit is correspondingly connected with the positive electrode of one battery box, and the output end of each voltage detection circuit is connected with the control circuit.
The utility model has the advantages that: through setting up two at least battery casees, form redundant power supply backup, control circuit obtains the voltage of current power supply battery case output and the voltage of the next battery case of waiting to switch through voltage detection circuit, when the voltage of current power supply battery case is less than the default, and when the voltage of next battery case is higher than the default, control controllable switch break-make, switch the power supply of next battery case, the stability of battery supply voltage output has been improved, reliability and duration, and can be under the prerequisite of uninterrupted power consumption electronic equipment power supply, carry out the battery and change, the convenience of use has been improved.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the power output interface adopts a universal DC power socket.
The beneficial effect of adopting above-mentioned further scheme is through selecting for use general DC supply socket to supply power for various electronic equipment more conveniently.
Furthermore, the controllable switch adopts an electromagnetic relay, the electromagnetic relay is connected between the positive electrode of the battery box and the positive electrode of the power output interface in series, and the control end of the electromagnetic relay is connected with the control circuit. The electromagnetic relay may be of the type CMP7-S-DC-12V-AA
The beneficial effect of adopting above-mentioned further scheme is that, through selecting for use electromagnetic relay, realized power supply circuit and control circuit's isolation, improved the reliability of circuit, and, utilize electromagnetic relay shorter switching time, improved the stability of power supply.
Further, the voltage detection circuit comprises an A/D conversion circuit, the input end of the A/D conversion circuit is connected with the anode of the battery box, and the output end of the A/D conversion circuit is connected with the control circuit.
Adopt above-mentioned further scheme's beneficial effect is, gather the voltage of battery case output through AD transfer circuit to provide control circuit, so that control circuit controls according to battery case voltage status.
Further, the chip model of the A/D conversion circuit is AD 7921.
The beneficial effect of adopting the above further scheme is that the precision of the power supply voltage control is further improved by selecting the A/D converter with higher precision.
Further, the control circuit comprises a single chip microcomputer.
Furthermore, the single chip microcomputer and the A/D conversion circuit are integrated in a processor chip.
The further scheme has the advantages that the integrated chip is selected, so that the circuit design is simplified, the cost is saved, and the reliability is improved.
Further, the model of the processor chip is STM32F030C8T 6.
Further, the LED lamp comprises at least two LED indicating lamps, and each LED indicating lamp is connected with the control circuit.
Adopt above-mentioned further scheme's beneficial effect is, instruct the battery case that is supplying power at present through setting up the LED pilot lamp, be convenient for change used battery in the battery case of other unoperations to realize power supply unit's continuous power supply.
The battery pack further comprises a current detection circuit, the current detection circuit is connected between the negative electrode of the battery box and the negative electrode of the power output interface in series or between the controllable switch and the positive electrode of the power output interface in series, and the output end of the current detection circuit is connected with the control circuit.
The power supply device has the advantages that the current detection circuit is arranged, and when the output current is larger than the preset value, the power supply is turned off, so that the safety of the power supply device is improved.
Drawings
Fig. 1 is one of schematic block diagrams of a power supply device according to an embodiment of the present invention;
fig. 2 is a second schematic circuit block diagram of a power supply device according to an embodiment of the present invention.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a power supply device includes at least two battery boxes, a power output interface, at least two controllable switches, at least two voltage detection circuits, and a control circuit for controlling the on/off of the controllable switches according to the voltage detection values output by the voltage detection circuits;
the negative electrodes of the battery boxes are connected in parallel and connected with the negative electrode of the power output interface;
each controllable switch is correspondingly connected between the positive electrode of one battery box and the positive electrode of the power output interface in series;
the control end of each controllable switch is connected with the control circuit;
the input end of each voltage detection circuit is correspondingly connected with the positive electrode of one battery box, and the output end of each voltage detection circuit is connected with the control circuit. The battery box is used for installing batteries, and when the battery box is used, a full-load battery is arranged in the battery box.
The control circuit controls the on-off of the controllable switch according to a voltage detection value output by the voltage detection circuit, mainly obtains the voltage output by the current power supply battery box, controls to turn off the controllable switch corresponding to the current power supply battery box when the output voltage is smaller than a first preset voltage, and controls to turn on the controllable switch corresponding to the current power supply battery box when the voltage output by the next battery box is higher than a second preset voltage so as to realize the switching of the power supply of the battery box.
It should be noted that, during normal operation, only one controllable switch corresponding to the battery box is in an on state to realize power supply.
It should be noted that, in an actual application scenario, the first preset voltage and the second preset voltage may be set according to a requirement of the electrical device, and the first preset voltage may be inconsistent with the second preset voltage, and the influence of the battery bounce effect is considered (that is, when the battery is not connected to the load, a voltage detection value of the battery is high), so that the second preset voltage is higher than the first preset voltage by a certain amplitude, and the stability of power supply is further improved.
In the above embodiment, through setting up two at least battery casees, form the redundant power supply backup, control circuit obtains the voltage of current power supply battery case output and the voltage of the next battery case of waiting to switch through voltage detection circuit, when the voltage of current power supply battery case is less than the default, and when the voltage of next battery case is higher than the default, the break-make of control controllable switch, switch the power supply of next battery case, the stability of battery supply voltage output has been improved, reliability and duration, and can be under the prerequisite of uninterrupted power consumption electronic equipment power supply, carry out the battery and change, the convenience of use has been improved.
Optionally, the power output interface adopts a general DC power socket.
In the above embodiment, the universal DC power socket is selected to supply power to various electronic devices more conveniently.
Optionally, the controllable switch is an electromagnetic relay, the electromagnetic relay is connected in series between the positive electrode of the battery box and the positive electrode of the power output interface, and the control end of the electromagnetic relay is connected to the control circuit. The electromagnetic relay may be of the type CMP7-S-DC-12V-AA
In the above embodiment, the isolation between the power supply loop and the control loop is realized by selecting the electromagnetic relay, so that the reliability of the circuit is improved, and the stability of power supply is improved by using shorter switching time of the electromagnetic relay.
Optionally, the voltage detection circuit includes an a/D conversion circuit, an input end of the a/D conversion circuit is connected to the positive electrode of the battery box, and an output end of the a/D conversion circuit is connected to the control circuit.
In the above embodiment, the voltage output by the battery box is collected by the a/D transfer circuit and provided to the control circuit, so that the control circuit can control the voltage according to the voltage state of the battery box.
Optionally, the chip model of the a/D conversion circuit is AD 7921.
In the above embodiment, the a/D converter with higher accuracy is selected to further improve the accuracy of the power supply voltage control.
Optionally, the control circuit includes a single chip microcomputer.
Optionally, the single chip microcomputer and the a/D conversion circuit are integrated in one processor chip.
In the embodiment, the integrated chip is selected, so that the circuit design is simplified, the cost is saved, and the reliability is improved.
Optionally, the processor chip is model number STM32F030C8T 6.
Optionally, the LED lamp further comprises at least two LED indicator lamps, and each LED indicator lamp is connected with the control circuit.
The LED indicator light is used for indicating the battery box which is currently powered under the control of the control circuit.
In the above embodiment, the LED indicator is arranged to indicate the battery box currently supplying power, so that the used battery in other battery boxes not in operation can be replaced conveniently, and continuous power supply of the power supply device is realized.
Optionally, as shown in fig. 2, the battery pack further includes a current detection circuit, the current detection circuit is connected in series between the negative electrode of the battery box and the negative electrode of the power output interface or between the controllable switch and the positive electrode of the power output interface, and an output end of the current detection circuit is connected to the control circuit.
The current detection circuit may be composed of a resistor and an a/D converter. When the current detected by the current detection circuit is greater than a preset value, the control circuit cuts off the controllable switch to protect the power supply device.
In the embodiment, the power supply is turned off by arranging the current detection circuit and when the output current is greater than the preset value, so that the safety of the power supply device is improved.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A power supply device is characterized by comprising at least two battery boxes, a power output interface, at least two controllable switches, at least two voltage detection circuits and a control circuit, wherein the control circuit is used for controlling the on-off of the controllable switches according to voltage detection values output by the voltage detection circuits;
the negative electrodes of the battery boxes are connected in parallel and connected with the negative electrode of the power output interface;
each controllable switch is correspondingly connected between the positive electrode of one battery box and the positive electrode of the power output interface in series;
the control end of each controllable switch is connected with the control circuit;
the input end of each voltage detection circuit is correspondingly connected with the positive electrode of one battery box, and the output end of each voltage detection circuit is connected with the control circuit.
2. The power supply device according to claim 1, wherein the power output interface is a universal DC power socket.
3. The power supply device according to claim 1, wherein the controllable switch is an electromagnetic relay, the electromagnetic relay is connected in series between the positive electrode of the battery box and the positive electrode of the power output interface, and a control terminal of the electromagnetic relay is connected to the control circuit.
4. The power supply device according to claim 1, wherein the voltage detection circuit comprises an a/D conversion circuit, an input terminal of the a/D conversion circuit is connected to the positive electrode of the battery box, and an output terminal of the a/D conversion circuit is connected to the control circuit.
5. The power supply device according to claim 4, wherein the chip type of the A/D conversion circuit is AD 7921.
6. The power supply device according to claim 4, wherein the control circuit comprises a single chip microcomputer.
7. The power supply device of claim 6, wherein the single chip and the a/D conversion circuit are integrated in a single processor chip.
8. The power supply device according to claim 7, wherein the processor chip is of the model STM32F030C8T 6.
9. The power supply device of claim 1, further comprising at least two LED indicators, each LED indicator being connected to said control circuit.
10. A power supply device according to any one of claims 1-9, further comprising a current detection circuit, said current detection circuit being connected in series between the negative pole of said battery box and the negative pole of said power output interface or between said controllable switch and the positive pole of said power output interface, the output of said current detection circuit being connected to said control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020177294.6U CN211320983U (en) | 2020-02-17 | 2020-02-17 | Power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020177294.6U CN211320983U (en) | 2020-02-17 | 2020-02-17 | Power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211320983U true CN211320983U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020177294.6U Active CN211320983U (en) | 2020-02-17 | 2020-02-17 | Power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211320983U (en) |
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2020
- 2020-02-17 CN CN202020177294.6U patent/CN211320983U/en active Active
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