CN213213142U

CN213213142U - Power management system of handheld device

Info

Publication number: CN213213142U
Application number: CN202021894420.6U
Authority: CN
Inventors: 赵凯
Original assignee: Zhejiang Qiyang Intelligent Technology Co ltd
Current assignee: Zhejiang Qiyang Intelligent Technology Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-05-14
Anticipated expiration: 2030-09-02

Abstract

The utility model discloses a power management system of hand-held type equipment, including power management module, be used for to power management module input external power source's interface, be used for the lithium cell of power supply, be used for converting the power of power management module input into working power source's boost module, be used for controlling the switch controller of working power source output, power management module is connected with interface, lithium cell, boost module respectively, and boost module is connected with switch controller. The utility model discloses can accomplish and charge, discharge, stably supply power for the load, but the power supply of manual closed system.

Description

Power management system of handheld device

Technical Field

The utility model belongs to the technical field of power management technique and specifically relates to a power management system of hand-held type equipment is related to.

Background

At present, a large number of handheld terminals are applied to the field of industrial control, and various applications such as a handheld voltmeter and ammeter, a handheld detector and the like are also provided in an electric device. In order to obtain good mobility and excellent power supply characteristics, the handheld terminal is generally powered by a rechargeable battery.

The power supply of the handheld device taking the lithium battery as the power supply is generally completed by the lithium battery alone, the external power supply can only charge the battery, the handheld device cannot be directly powered, and the utilization rate of electric energy is low. And the energy density of the lithium battery is much higher than that of the traditional lead-acid battery, so that dangerous conditions such as fire and the like are easy to occur. For such devices, a stable and reliable power management system is usually required to improve the endurance of the device, reduce the quiescent current of the device in the shutdown state, and ensure the safe operation of the system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned technical problem, provide a power management system of hand-held type equipment, the utility model discloses can accomplish to charge, discharge, stably supply power for subsequent system, but the manual power supply of closing the system.

The utility model provides a technical scheme that above-mentioned technical problem adopted is: the utility model provides a power management system of hand-held device, includes power management module, is used for to power management module input external power's interface, the lithium cell that is used for the power supply, be used for converting the power of power management module input into working power's boost module, be used for controlling the switch controller of working power output, power management module is connected with interface, lithium cell, boost module respectively, boost module is connected with switch controller.

Preferably, the power management module includes a power management circuit, the power management circuit includes a first chip, a first overcurrent protection circuit connected to the first chip, and an output circuit for outputting electric energy to the boost module and connected to the boost module, and the first chip is connected to the interface, the lithium battery, the first overcurrent protection circuit, and the output circuit, respectively.

Preferably, the first overcurrent protection circuit comprises a second resistor, one end of the second resistor is connected with the first chip, and the other end of the second resistor is grounded; the output circuit comprises a coil, an electric energy output end and a plurality of capacitors connected in parallel, the coil is connected with the electric energy output end and the plurality of capacitors connected in parallel in series, and the coil is connected with the first chip.

Preferably, the first chip is further connected with an I2C controller.

Preferably, the first chip is further connected with a state indicating circuit for indicating the charging state, the state indicating circuit includes a light emitting diode and a first resistor, the light emitting diode is connected in series with the first resistor, and the first resistor is connected with the first chip.

Preferably, the boost module comprises a boost circuit, the boost circuit comprises a second chip, a DL transmission circuit, a power supply circuit and a DC output circuit, the second chip is respectively connected with the DL transmission circuit, the power supply circuit and the DC output circuit, and the DL transmission circuit is connected with the electric energy output end.

Preferably, the second chip is connected with a filter circuit, the filter circuit comprises a filter capacitor, and the second chip is connected with the filter capacitor.

Preferably, the second chip is further connected with a feedback circuit, the feedback circuit comprises a third resistor and a fourth resistor which are connected in parallel, one end of each of the third resistor and the fourth resistor is connected with the second chip, the other end of each of the third resistor and the fourth resistor is connected with the DC output circuit, and the other end of each of the fourth resistor and the fourth resistor is grounded.

Preferably, the second chip is further connected with a second overcurrent protection circuit, the second overcurrent protection circuit comprises a fifth resistor, one end of the fifth resistor is connected with the second chip, and the other end of the fifth resistor is grounded.

Preferably, the switch controller comprises a switch control circuit and a switch circuit, the switch control circuit comprises a third chip, the switch circuit comprises a tact switch, the tact switch is connected with the third chip, and the third chip is connected with the DC output circuit.

The utility model has the advantages that:

1. the charging and discharging can be completed, the power can be stably supplied to a subsequent system, and the power supply of the system can be manually closed;

2. the system can be integrated in any hardware system of handheld equipment with a battery, occupies less resources, and is safe and reliable;

3. when the lithium battery is not connected, the lithium battery can be externally discharged only through the booster circuit;

4. through the design of the tact switch, the discharge can be directly controlled through the switch controller;

5. through the design of the first overcurrent protection circuit, the second overcurrent protection circuit and the feedback circuit, the circuit is stable and safe.

Drawings

Fig. 1 is a schematic connection diagram of the present invention.

FIG. 2 is a circuit diagram of a power management circuit;

FIG. 3 is a circuit diagram of a boost circuit;

FIG. 4 is a circuit diagram of a switch control circuit;

fig. 5 is a circuit diagram of the switching circuit.

In the figure: 1. the power management module comprises a power management module 11, a first chip 12, a first overcurrent protection circuit 121, a second resistor 13, an output circuit 131, a coil 132, an electric energy output end 133, a capacitor 2, an interface 3, a lithium battery 4, a boosting module 41, a second chip 42, a DL transmission circuit 43, a power supply circuit 44, a DC output circuit 45, a filter circuit 451, a filter capacitor 46, a feedback circuit 461, a third resistor 462, a fourth resistor 47, a second overcurrent protection circuit 471, a fifth resistor 5, a switch controller 51, a third chip 52, a tact switch 6, an I2C controller 7, a state indication circuit 71, a light emitting diode 72, a first resistor

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

As shown in fig. 1-5, the utility model relates to a power management system of hand-held device, including power management module 1, an interface 2 for inciting somebody to action external power source to power management module 1, a lithium cell 3 for the power supply, a boost module 4 for converting the power of power management module 1 input into working power supply, a switch controller 5 for controlling working power supply output, power management module 1 respectively with interface 2, lithium cell 3, boost module 4 is connected with switch controller 5, switch controller 5 is connected with the load. The load includes the subsequent system.

The power management module 1 comprises a power management circuit, the power management circuit comprises a first chip 11, a first overcurrent protection circuit 12 connected with the first chip 11, and an output circuit 13 used for outputting electric energy to the boost module 4 and connected with the boost module 4, and the first chip 11 is respectively connected with the interface 2, the lithium battery 3, the first overcurrent protection circuit 12, and the output circuit 13.

The first overcurrent protection circuit 12 comprises a second resistor 12, one end of the second resistor 12 is connected with the first chip 11, and the other end of the second resistor 12 is grounded; the output circuit 13 includes a coil 131, a power output end 132 and a plurality of capacitors 133 connected in parallel, the coil 131 is connected in series with the power output end 132 and the plurality of capacitors 133 connected in parallel, and the coil 131 is connected with the first chip 11.

The first chip 11 is also connected to an I2C controller 6.

The first chip 11 is further connected with a state indicating circuit 7 for indicating a charging state, the state indicating circuit 7 includes a light emitting diode 71 and a first resistor 72, the light emitting diode 71 is connected in series with the first resistor 72, and the first resistor 72 is connected with the first chip 11.

The boost module 4 includes a boost circuit, the boost circuit includes a second chip 41, a DL transmission circuit 42, a power supply circuit 43, and a DC output circuit 44, the second chip 41 is connected to the DL transmission circuit 42, the power supply circuit 43, and the DC output circuit 44, respectively, and the DL transmission circuit 42 is connected to the power output end 132.

The second chip 41 is connected with a filter circuit 45, the filter circuit 45 includes a filter capacitor 451, and the second chip 41 is connected with the filter capacitor 451.

The second chip 41 is further connected with a feedback circuit 46, the feedback circuit 46 includes a third resistor 461 and a fourth resistor 462 connected in parallel, one end of the third resistor 461 and one end of the fourth resistor 462 are both connected with the second chip 41, the other end of the third resistor 461 is connected with the DC output circuit 44, and the other end of the fourth resistor 462 is grounded.

The second chip 41 is further connected with a second over-current protection circuit 47, the second over-current protection circuit 47 includes a fifth resistor 471, one end of the fifth resistor 471 is connected with the second chip 41, and the other end of the fifth resistor 471 is grounded.

The switch controller 5 includes a switch control circuit including a third chip 51 and a switch circuit including a tact switch 52, the tact switch 52 is connected to the third chip 51, and the third chip 51 is connected to the DC output circuit 44.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power management system for a handheld device, comprising: the power supply management device comprises a power supply management module (1), an interface (2) for inputting an external power supply to the power supply management module (1), a lithium battery (3) for supplying power, a boosting module (4) for converting the power supply input by the power supply management module (1) into a working power supply, and a switch controller (5) for controlling the output of the working power supply, wherein the power supply management module (1) is respectively connected with the interface (2), the lithium battery (3) and the boosting module (4), and the boosting module (4) is connected with the switch controller (5).

2. The power management system of a handheld device of claim 1, wherein: the power management module (1) comprises a power management circuit, the power management circuit comprises a first chip (11), a first overcurrent protection circuit (12) connected with the first chip (11), and an output circuit (13) used for outputting power to the boosting module (4) and connected with the boosting module (4), and the first chip (11) is respectively connected with the interface (2), the lithium battery (3), the first overcurrent protection circuit (12) and the output circuit (13).

3. The power management system of a handheld device of claim 2, wherein: the first overcurrent protection circuit (12) comprises a second resistor (121), one end of the second resistor (121) is connected with the first chip (11), and the other end of the second resistor (121) is grounded; the output circuit (13) comprises a coil (131), an electric energy output end (132) and a plurality of capacitors (133) connected in parallel, the coil (131) is connected with the electric energy output end (132) and the plurality of capacitors (133) connected in parallel in series, and the coil (131) is connected with the first chip (11).

4. The power management system of a handheld device of claim 2 or 3, wherein: the first chip (11) is also connected with an I2C controller (6).

5. The power management system of the handheld device of claim 4, wherein: the first chip (11) is further connected with a state indicating circuit (7) used for indicating the charging state, the state indicating circuit (7) comprises a light emitting diode (71) and a first resistor (72), the light emitting diode (71) is connected with the first resistor (72) in series, and the first resistor (72) is connected with the first chip (11).

6. The power management system of claim 1 or 2 or 3 or 5 or the handheld device, wherein: the boosting module (4) comprises a boosting circuit, the boosting circuit comprises a second chip (41), a DL transmission circuit (42), a power supply circuit (43) and a DC output circuit (44), the second chip (41) is respectively connected with the DL transmission circuit (42), the power supply circuit (43) and the DC output circuit (44), and the DL transmission circuit (42) is connected with the electric energy output end (132).

7. The power management system of a handheld device of claim 6, wherein: the second chip (41) is connected with a filter circuit (45), the filter circuit (45) comprises a filter capacitor (451), and the second chip (41) is connected with the filter capacitor (451).

8. The power management system of a handheld device of claim 7, wherein: the second chip (41) is further connected with a feedback circuit (46), the feedback circuit (46) comprises a third resistor (461) and a fourth resistor (462) which are connected in parallel, one end of the third resistor (461) and one end of the fourth resistor (462) are both connected with the second chip (41), the other end of the third resistor (461) is connected with the DC output circuit (44), and the other end of the fourth resistor (462) is grounded.

9. The power management system of a handheld device of claim 8, wherein: the second chip (41) is further connected with a second overcurrent protection circuit (47), the second overcurrent protection circuit (47) comprises a fifth resistor (471), one end of the fifth resistor (471) is connected with the second chip (41), and the other end of the fifth resistor (471) is grounded.

10. The power management system of a handheld device of claim 1 or 2 or 3 or 5 or 7 or 8 or 9, wherein: the switch controller (5) comprises a switch control circuit and a switch circuit, the switch control circuit comprises a third chip (51), the switch circuit comprises a tact switch (52), the tact switch (52) is connected with the third chip (51), and the third chip (51) is connected with the DC output circuit (44).