CN212676906U

CN212676906U - Small-size portable power source management circuit

Info

Publication number: CN212676906U
Application number: CN202021027968.0U
Authority: CN
Inventors: 郭永利; 许思伟; 周少龙; 柳锦
Original assignee: Huizhou Desay Battery Co Ltd
Current assignee: Huizhou Desay Battery Co Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-03-09
Anticipated expiration: 2030-06-05

Abstract

The utility model relates to the technical field of electronic circuits, in particular to a small-sized mobile power supply management circuit, which comprises a primary protection module, a secondary protection module, a temperature detection module and an ESD absorption module; the primary protection module is connected with the secondary protection module and the ESD absorption module, and the temperature detection module is connected with the secondary protection module; the primary protection module comprises a primary protection detection IC, a first temperature switch, a charging MOSFET and a discharging MOSFET, and the first temperature switch, the charging MOSFET and the discharging MOSFET are respectively connected with the primary protection detection IC; the secondary protection module comprises a secondary protection detection IC and a protector connected with the secondary protection detection IC; the utility model discloses a set up the dual temperature and detect, better solution the incident that traditional small-size portable power source arouses because of the high temperature, traditional power management circuit relatively has advantages such as low cost, stable performance and interference killing feature are strong.

Description

Small-size portable power source management circuit

Technical Field

The utility model relates to an electronic circuit technical field especially relates to a small-size portable power source management circuit.

Background

With the development of the technology level, the integration technology, the communication technology and the interoperation technology are rapidly developed, and with the improvement of the technologies, the smart home is continuously changed in quality, and meanwhile, the requirement of a consumer on the management of a small mobile power supply in the field of smart home is higher and higher.

When the load is too heavy or the output is short-circuited, the existing small mobile power supply management circuit cannot well solve the problems of damage to a battery pack and safety accidents caused by overhigh temperature of the small mobile power supply; meanwhile, in a complex electromagnetic environment, the traditional mobile power supply often has bad phenomena of resetting, dead halt, functional failure and the like, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a small-size portable power source management circuit detects through setting up the duplicate temperature, better solution the incident that traditional small-size portable power source arouses because of the high temperature, and traditional power source management circuit has advantages such as low cost, stable performance and interference killing feature are strong relatively.

In order to solve the technical problem, the utility model provides a concrete scheme as follows:

a small-sized mobile power supply management circuit comprises a primary protection module, a secondary protection module, a temperature detection module and an ESD absorption module;

the primary protection module is connected with the secondary protection module and the ESD absorption module, and the temperature detection module is connected with the secondary protection module;

the primary protection module comprises a primary protection detection IC, a first temperature switch, a charging MOSFET and a discharging MOSFET, and the first temperature switch, the charging MOSFET and the discharging MOSFET are respectively connected with the primary protection detection IC;

the secondary protection module comprises a secondary protection detection IC and a protector connected with the secondary protection detection IC.

Optionally, the primary protection module is connected to a first filter circuit;

the secondary protection module is connected with a second filter circuit, and effectively filters the frequency point of the specific frequency in the power line or the frequency except the frequency point by arranging the first filter circuit and the second filter circuit, so that a power signal of the specific frequency is obtained, and the use stability of the circuit is improved.

Optionally, the ESD absorbing module includes a first ESD absorbing unit and a second ESD absorbing unit;

the first ESD absorption unit is connected with a primary protection detection IC;

one end of the second ESD absorption unit is connected with the discharge MOSFET, the other end of the second ESD absorption unit is connected with the primary protection detection IC, the problem of the anti-interference capacity of the mobile power supply under a complex electromagnetic environment is effectively solved by arranging the first ESD absorption unit and the second ESD absorption unit, and safety accidents of a traditional mobile power supply management system are avoided.

Optionally, the first ESD absorbing unit includes a first diode;

the second ESD absorption unit comprises a second diode, a first capacitor and a second capacitor;

the first capacitor and the second capacitor are connected in series and then are connected with the second diode in parallel.

Optionally, the first diode and the second diode are both transient suppressor diodes, and when two poles of the transient suppressor diodes are impacted by high energy of reverse transient, the transient suppressor diodes can change the high impedance between the two poles into low impedance at a speed of 10 minus 12 times of a second, absorb surge power up to several kilowatts, clamp the voltage between the two poles at a predetermined value, and effectively protect precision components in electronic circuits from various surge pulses.

Optionally, the temperature detection module comprises a first field effect transistor and a second temperature switch connected with the first field effect transistor, when the primary protection module and the secondary protection module fail, when the load is too heavy or the output short circuit occurs, the temperature of the first field effect transistor body is inevitably overhigh, the temperature detection module can monitor the temperature rise of the first field effect transistor body in real time, when the temperature rise reaches a corresponding threshold value, the temperature detection module generates corresponding action to trigger the protector, a main circuit of the battery panel is cut off, and then the occurrence of safety accidents of the battery pack is avoided.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a pair of small-size portable power source management circuit detects through setting up the duplicate temperature, better solution the incident that traditional small-size portable power source arouses because of the high temperature, and traditional power source management circuit relatively has advantages such as low cost, stable performance and interference killing feature are strong.

Drawings

Fig. 1 is a schematic diagram of a small-sized mobile power management circuit according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a small-sized mobile power management circuit provided in an embodiment of the present invention.

Detailed Description

In order to explain the technical solution of the present invention in detail, the following will combine the drawings of the embodiments of the present invention to perform clear and complete description on the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

For example, a small-sized mobile power management circuit comprises a primary protection module, a secondary protection module, a temperature detection module and an ESD absorption module; the primary protection module is connected with the secondary protection module and the ESD absorption module, and the temperature detection module is connected with the secondary protection module; the primary protection module comprises a primary protection detection IC, a first temperature switch, a charging MOSFET and a discharging MOSFET, and the first temperature switch, the charging MOSFET and the discharging MOSFET are respectively connected with the primary protection detection IC; the secondary protection module comprises a secondary protection detection IC and a protector connected with the secondary protection detection IC.

The small-size portable power source management circuit that this embodiment provided detects through setting up the dual temperature, better solution the small-size portable power source of tradition because of the incident that the high temperature arouses, and traditional power source management circuit relatively has advantages such as low cost, stable performance and interference killing feature are strong.

As shown in fig. 1 and 2, the small-sized mobile power management circuit includes a primary protection module, a secondary protection module, a temperature detection module, and an ESD absorption module.

The primary protection module is connected with the secondary protection module and the ESD absorption module, and the temperature detection module is connected with the secondary protection module.

The primary protection module comprises a primary protection detection IC, a first temperature switch, a charging MOSFET and a discharging MOSFET, wherein the first temperature switch, the charging MOSFET and the discharging MOSFET are respectively connected with the primary protection detection IC.

When the voltage, the current and the temperature exceed preset thresholds, the primary protection module starts protection action, the charging MOSFET and the discharging MOSFET are closed, the charging loop and the discharging loop are cut off, and then the mobile power supply and the terminal host are protected.

In this example, the NTC is further provided, compared with a traditional power management system, the power management system has two temperature protection mechanisms, namely the first temperature switch and the NTC, when the voltage, the current and the temperature exceed preset thresholds, the first temperature switch is disconnected, the NTC transmits the temperature value to the main control, and the main control can conveniently perform subsequent actions on the circuit.

The secondary protection module includes a secondary protection detection IC, a protector connected to the secondary protection detection IC, and in this example, the protector is a three-terminal fuse capable of ensuring that the power supply can be reliably cut off when a short circuit occurs, or when a current close to the value of the short-circuit current occurs.

When the primary protection module fails and the secondary protection detection IC detects an overvoltage state, the protection action is immediately started, the three-terminal fuse is fused, the main loop of the mobile power supply is cut off, and safety accidents are avoided.

Compared with the traditional power management system, when the traditional power management system triggers secondary protection, the main loop is cut off when the battery cell is in an overvoltage state, and when the voltage of the battery cell is recovered to be within a threshold value, the mobile power loop is opened again, so that the mobile power supply is allowed to perform charging and discharging actions again. In this state, the one-time protection mechanism fails, and the battery core is damaged by different degrees due to overvoltage, so that safety accidents such as spontaneous combustion and the like are easily caused if the mobile power supply is allowed to charge and discharge. According to the mobile power supply management system, a more reasonable control strategy is adopted, and safety accidents which cannot be avoided by a traditional mobile power supply management system are successfully solved.

When the primary protection module and the secondary protection module fail, and the temperature rises to reach a corresponding threshold value, the temperature detection module generates corresponding action to FUSE the three terminals of FUSE and cut off a main loop of the battery pack, so that safety accidents of the battery pack are avoided.

The ESD absorption module can absorb static electricity release in a circuit, successfully solves the problem of interference of the static electricity release on products, solves the problem of anti-interference capability of a mobile power supply under a complex electromagnetic environment, and avoids safety accidents of a traditional mobile power supply management system.

In some embodiments, the primary protection module is connected with a first filter circuit; the secondary protection module is connected with a second filter circuit.

The power supply signal with a specific frequency is obtained by effectively filtering the frequency point of the specific frequency in the power line or frequencies except the frequency point through the arrangement of the first filter circuit and the second filter circuit, and the use stability of the circuit is improved.

In some embodiments, the ESD absorption module includes a first ESD absorption cell and a second ESD absorption cell; the first ESD absorption unit is connected with the primary protection detection IC; one end of the second ESD absorption unit is connected with the discharge MOSFET, the other end of the second ESD absorption unit is connected with the primary protection detection IC, the problem of the anti-interference capacity of the mobile power supply under a complex electromagnetic environment is effectively solved by arranging the first ESD absorption unit and the second ESD absorption unit, and safety accidents of a traditional mobile power supply management system are avoided.

The first ESD absorbing unit includes a first diode TVS1, and the second ESD absorbing unit includes a second diode TVS2, a first capacitor C13, and a second capacitor C14; the first capacitor C13 and the second capacitor C14 are connected in series and then connected in parallel with the second diode TVS 2.

In the circuit, the first diode TVS1 and the second diode TVS2 are transient suppressor diodes, and when the two poles of the transient suppressor diodes are impacted by high energy of reverse transient, the transient suppressor diodes can change the high impedance between the two poles into low impedance at the speed of 10 minus 12 times of a second, absorb the surge power of thousands of watts, clamp the voltage between the two poles at a preset value, and effectively protect the precise components in the electronic circuit from various surge pulses.

In some embodiments, the temperature detection module comprises a first field effect transistor Q6 and a second temperature switch WF1 connected to the first field effect transistor Q6, when the primary protection module and the secondary protection module fail, when the load is too heavy or the output is short-circuited, the temperature detection module inevitably causes the temperature of the first field effect transistor body to be too high, the temperature detection module monitors the temperature rise of the first field effect transistor body in real time, and when the temperature rise reaches a corresponding threshold, the temperature detection module generates a corresponding action to trigger the protector, and cut off the main circuit of the battery panel, thereby avoiding the occurrence of a safety accident of the battery pack.

It is understood that different embodiments among the components in the above embodiments can be combined and implemented, and the embodiments are only for illustrating the implementation of specific structures and are not limited to the implementation of the embodiments.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A small-sized mobile power supply management circuit is characterized by comprising a primary protection module, a secondary protection module, a temperature detection module and an ESD absorption module;

2. The small-sized mobile power management circuit according to claim 1, wherein the primary protection module is connected with a first filter circuit;

and the secondary protection module is connected with a second filter circuit.

3. The small form factor mobile power management circuit of claim 1, wherein the ESD absorption module comprises a first ESD absorption cell and a second ESD absorption cell;

one end of the second ESD absorption unit is connected with the discharge MOSFET, and the other end of the second ESD absorption unit is connected with the primary protection detection IC.

4. The small form factor portable power management circuit of claim 3, wherein the first ESD absorption unit comprises a first diode;

5. The small form factor mobile power management circuit of claim 4, wherein the first diode and the second diode are both transient suppression diodes.

6. The small mobile power management circuit according to claim 1, wherein the temperature detection module comprises a first field effect transistor and a second temperature switch connected to the first field effect transistor.