CN212137316U

CN212137316U - Power supply

Info

Publication number: CN212137316U
Application number: CN202020843006.6U
Authority: CN
Inventors: 杨晨
Original assignee: Shanghai Charles Electronic Co ltd
Current assignee: Shanghai Charles Electronic Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-12-11
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses a power supply, include the heat conduction box and be located PCB board in the heat conduction box, the heat conduction box include the box body and with the lid of connection can be dismantled to the box body, be provided with a plurality of spliced poles in the box body, the spliced pole with PCB board fixed connection, be attached to the conducting strip in the box body, the back of PCB board with the centre gripping has the heat conduction insulator between the conducting strip, the front of PCB board is provided with circuit module, circuit module includes filter circuit, voltage stabilizing circuit, step-down circuit, charging circuit, battery, voltage detection chip, switch tube and output circuit. The utility model has the advantages that: the heat dissipation device has a good heat dissipation effect, can effectively prevent the power supply from breaking down due to overheating, and prolongs the service life of the power supply; the voltage reduction circuit can be used for supplying power and outputting when the battery is charged, and the battery is used for supplying power when the battery is not charged, so that the battery is ensured not to be supplied with power in the charging process.

Description

Power supply

Technical Field

The utility model relates to a power supply unit's technical field particularly, relates to a power.

Background

In many intelligent devices, for example, in a system device controlled by an MCU chip, a battery is usually provided to supply power to the whole system in order to enhance the portability of the device, and when the battery is low, the battery is charged to supplement the power, however, the battery is still used to supply power during the charging process, which results in a large loss of the battery.

In addition, the traditional power supply has poor heat dissipation effect, and the UPS power supply is easy to break down due to overheating.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem among the correlation technique, the utility model provides a power, the radiating effect is good, long service life, can not come the power supply by the battery in battery charging process, and continue to keep work.

In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:

a power supply comprises a heat conduction box and a PCB (printed Circuit Board) positioned in the heat conduction box, and is characterized in that the heat conduction box comprises a box body and a box cover detachably connected with the box body, a plurality of connecting posts are arranged in the box body, the connecting posts are fixedly connected with the PCB, heat conducting fins are attached in the box body, a heat conducting insulator is clamped between the back surface of the PCB and the heat conducting fins, a circuit module is arranged on the front surface of the PCB, the circuit module comprises a voltage reduction circuit, the input end of the voltage reduction circuit is connected with the output end of a voltage stabilizing circuit, the input end of the voltage stabilizing circuit is connected with the output end of a filter circuit, the input end of the filter circuit is connected with an input interface arranged on the box body, and the output end of the voltage reduction circuit is respectively connected with the input end of a voltage detection chip, the output of voltage detection chip connects the control end of switch tube, charging circuit's output is connected with the battery, the battery is connected the input of switch tube, output circuit's input is still connected the output of switch tube, output circuit's output is connected the setting and is in output interface on the box body.

Optionally, the case body is detachably connected to the case cover by a screw.

Optionally, hook grooves are formed in two sides of the box cover, and a connecting hook in clamping fit with the hook grooves is arranged on the box body.

Further, the outer surface of the heat conduction box is provided with a plurality of heat dissipation fins parallel to each other.

The utility model has the advantages that: the heat dissipation device has a good heat dissipation effect, can effectively prevent the power supply from breaking down due to overheating, and prolongs the service life of the power supply; the voltage reduction circuit can be used for supplying power and outputting when the battery is charged, and the battery is used for supplying power when the battery is not charged, so that the battery is ensured not to be supplied with power in the charging process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a power supply according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of a circuit module according to an embodiment of the present invention.

In the figure:

1. a box body; 2. a box cover; 3. a PCB board; 4. a heat conductive sheet; 5. a thermally conductive insulator; 6. hooking a groove; 7. a connecting hook; 8. and (4) radiating fins.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

As shown in figures 1-2, according to the embodiment of the utility model provides a power supply, include the heat conduction box and be located PCB board 3 in the heat conduction box, the heat conduction box include box body 1 and with box body 1 can dismantle lid 2 of connection, be provided with a plurality of spliced poles in the box body 1, the spliced pole with PCB board 3 fixed connection, it has conducting strip 4 to adhere to in the box body 1, the back of PCB board 3 with heat conduction insulator 5 is held to the clamp between conducting strip 4, the front of PCB board 3 is provided with circuit module, circuit module includes the step-down circuit, the output of voltage stabilizing circuit is connected to the input of step-down circuit, the output of filter circuit is connected to the input of voltage stabilizing circuit, the input connection of filter circuit sets up input interface on the box body 1, the input of voltage detection chip is connected respectively to the output of step-down circuit, The input of charging circuit and output circuit's input, the control end of voltage detection chip's output connection switch tube, charging circuit's output is connected with the battery, the battery is connected the input of switch tube, output circuit's input is still connected the output of switch tube, output circuit's output is connected and is set up output interface on the box body 1.

In a specific embodiment of the present invention, the box body 1 is detachably connected to the box cover 2 by screws. Or, hook grooves 6 are formed in two sides of the box cover 2, and connecting hooks 7 which are matched with the hook grooves 6 in a clamping mode are arranged on the box body 1.

In a specific embodiment of the present invention, the outer surface of the heat conducting box is provided with a plurality of heat radiating fins 8 parallel to each other.

For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.

The power supply comprises a heat conduction box, a PCB (printed circuit board) 3 and a circuit module.

The heat conduction box includes box body 1 and lid 2, and catching groove 6 has been seted up to the both sides of lid 2, be provided with on the box body 1 with catching groove 6 joint complex is connected and is colluded 7, and the accessible colludes 7 joints with connecting during the use and realize the high-speed joint of box body 1 and lid 2 in catching groove 6, and the mode that can adopt traditional screw connection to realize box body 1 and lid 2 does not adopt above-mentioned mode certainly also.

The box body 1 is provided with an input interface and an output interface. PCB board 3 passes through screw fixed connection on the spliced pole in box body 1, and the bottom in the box body 1 is adhered to has conducting strip 4, and the centre gripping has heat conduction insulator 5 between the back of conducting strip 4 and PCB board 3, for the work that circuit module on guaranteeing PCB board 3 can be stable for a long time, and avoids it to produce the electricity with box body 1 and be connected and lead to the condition such as short circuit, the utility model discloses be provided with a heat conduction insulator 5 between PCB board 3 and box body 1, heat conduction insulator 5 presss from both sides and locates between the back of conducting strip 4 and PCB board 3 and hug closely conducting strip 4 and PCB board 3 to play insulating and heat conduction's dual effect.

The heat conduction box can be the outside that gives off the heat in box body 1 inside, in order to improve the radiating efficiency, has set up a plurality of radiating fin 8 that are parallel to each other on the surface of heat conduction box.

The circuit module sets up in PCB board 3's front, and the circuit module includes: the device comprises a filter circuit, a voltage stabilizing circuit, a voltage reducing circuit, a charging circuit, a battery, a voltage detection chip, a switch tube and an output circuit. The battery may be a lithium battery. The input interface is connected with an external voltage end to receive input voltage; the filter circuit is connected with the input interface and outputs the input voltage after filtering; the voltage stabilizing circuit is used for stabilizing the voltage output by the filtering circuit and outputting the voltage to the voltage reducing circuit. The voltage reduction circuit receives the voltage output by the voltage stabilizing circuit and reduces the voltage to output. The voltage reduction circuit is connected to the output side of the voltage stabilizing circuit and can reduce voltage. The charging circuit is connected with the voltage reduction circuit and the battery, and the charging circuit receives the voltage output by the voltage reduction circuit and charges the battery. The charging circuit can charge the battery. The input end of the voltage detection chip is connected with the output end of the voltage reduction circuit, and the output end of the voltage detection chip is connected with the control end of the switching tube; the input end of the switching tube is connected with the anode of the battery; the input end of the output circuit is connected with the output end of the switching tube on one hand and connected with the output end of the voltage reduction circuit on the other hand; the switch tube is a PMOS tube; when the output of the output end of the voltage reduction circuit is high, the voltage detection chip controls the switching tube to be cut off, so that the switching tube cannot transmit the voltage output by the battery to the output circuit, and the output end of the voltage reduction circuit is high-level output at the moment, so that only the output end of the voltage reduction circuit supplies power to the output circuit; when the output of the output end of the voltage reduction circuit is low, the voltage detection chip controls the switch tube to be conducted, so that the voltage output by the battery is transmitted to the output circuit by the switch tube, and meanwhile, the output end of the voltage reduction circuit is low in level, so that only the battery supplies power for the output circuit. The voltage reduction circuit supplies power in the charging process of the battery, and the battery supplies power when the battery is not charged, namely the voltage reduction circuit does not output voltage. The output circuit is connected with the output interface and used for supplying power to external equipment, and the output circuit comprises a low-dropout voltage regulator and a filter capacitor. The input end (including voltage input and enable end) of the low-dropout voltage stabilizer is connected with the output end of the switching tube on one hand and connected with the output end of the step-down circuit on the other hand; the filter capacitor is connected between the output end of the low dropout voltage regulator and the ground so as to output and filter the power supply voltage output by the low dropout voltage regulator.

When the charging circuit is used specifically, external voltage can be accessed through the input interface, the external voltage can be reduced to a voltage value which can be charged by the charging circuit through the voltage reduction circuit, and therefore the charging circuit charges the battery, and the charging circuit is suitable for common external voltage; the output circuit is connected to the battery and the output end of the voltage reduction circuit, so that the voltage reduction circuit can supply power and output when the battery is charged, and the battery supplies power when the battery is not charged, and the battery is ensured not to supply power in the charging process.

In conclusion, by means of the technical scheme of the utility model, the heat dissipation device has good heat dissipation effect, can effectively prevent the power supply from breaking down due to overheating, and prolongs the service life of the power supply; the voltage reduction circuit can be used for supplying power and outputting when the battery is charged, and the battery is used for supplying power when the battery is not charged, so that the battery is ensured not to be supplied with power in the charging process.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply comprises a heat conduction box and a PCB (3) positioned in the heat conduction box, and is characterized in that the heat conduction box comprises a box body (1) and a box cover (2) detachably connected with the box body (1), a plurality of connecting columns are arranged in the box body (1), the connecting columns are fixedly connected with the PCB (3), heat conducting fins (4) are attached in the box body (1), a heat conducting insulator (5) is clamped between the back of the PCB (3) and the heat conducting fins (4), a circuit module is arranged on the front of the PCB (3), the circuit module comprises a voltage reduction circuit, the input end of the voltage reduction circuit is connected with the output end of a voltage stabilizing circuit, the input end of the voltage stabilizing circuit is connected with the output end of a filter circuit, the input end of the filter circuit is connected with an input interface arranged on the box body (1), the output end of the voltage reduction circuit is respectively connected with the input end of the voltage detection chip, the input end of the charging circuit and the input end of the output circuit, the output end of the voltage detection chip is connected with the control end of the switch tube, the output end of the charging circuit is connected with the battery, the battery is connected with the input end of the switch tube, the input end of the output circuit is further connected with the output end of the switch tube, and the output end of the output circuit is connected with the output interface arranged on the box body (1).

2. The power supply according to claim 1, characterized in that the box body (1) is detachably connected to the box cover (2) by means of screws.

3. The power supply according to claim 1, wherein hook grooves (6) are formed in two sides of the box cover (2), and a connecting hook (7) which is in clamping fit with the hook grooves (6) is arranged on the box body (1).

4. The power supply according to claim 1, characterized in that the outer surface of the heat conducting box is provided with a plurality of heat dissipating fins (8) parallel to each other.