CN211427303U - PCB protection system and server system - Google Patents

Abstract

The present application discloses a PCB protection system, comprising: a temperature acquisition module arranged on the surface of the PCB and used to collect the temperature of the PCB; a control module connected to the temperature acquisition module and used to generate a control signal when the PCB temperature is greater than a preset temperature value ; An external power supply module connected to the control module and used to stop supplying power to the PCB when a control signal is received. In this application, the temperature of the PCB is monitored by the temperature acquisition module. When the temperature of the PCB is too high, the control module generates a control signal to control the external power supply module to stop supplying power to the PCB, and disconnect the channel of high current passing through the PCB, thereby avoiding the constant short circuit heating of the PCB. The problem that the ignition point caused by the state persists and is accompanied by the fire phenomenon improves the safety of the PCB. The present application also discloses a server system, which has the above beneficial effects.

Description

A kind of PCB protection system and server system

technical field

The present application relates to the field of servers, and in particular, to a PCB protection system and a server system.

Background technique

With the rapid increase in the amount of Internet data, the amount of calculation and the frequency of calculation increase, the functional requirements of products are also increasing, and the board design inside the server is becoming more and more complex. PCB (Printed Circuit Board, printed circuit board) ) is also increasing. If the copper sheet is not firmly pasted during the manufacturing process of the PCB, it is easy to cause a short circuit or a capacitive effect. If the drilling of the PCB is not in the middle, but to one side, uneven matching will occur, or it will be easy to contact the power layer or bottom layer in the middle, resulting in potential short circuit or poor grounding factors. Although the material of the PCB is a flame retardant material, such as UL-94 grade, HB grade, etc., if the cause of the PCB burning is the above-mentioned short circuit or the material, the continuous current provided by the system power supply will keep the PCB in a short circuit. In a heat-generating state, the ignition point persists and is accompanied by a fire phenomenon, and the safety is low.

Therefore, how to provide a solution to the above technical problem is a problem that those skilled in the art need to solve at present.

Utility model content

The purpose of this application is to provide a protection system for PCB, when the temperature of the PCB is too high, the external power supply module is controlled to stop supplying power to the PCB, and the channel of high current passing through the PCB is disconnected, thereby avoiding the constant short-circuit heating of the PCB. The problem of the continuous existence of the ignition point of the high temperature and the accompanying fire phenomenon improves the safety of the PCB; another object of the present application is to provide a server system including the above-mentioned protection system for the PCB.

In order to solve the above-mentioned technical problems, the present application provides a protection system for PCB, including:

A temperature acquisition module located on the surface of the PCB and used to collect the temperature of the PCB;

a control module connected to the temperature acquisition module for generating a control signal when the PCB temperature is greater than a preset temperature value;

An external power supply module connected to the control module and configured to stop supplying power to the PCB upon receiving the control signal.

Preferably, the protection system further includes:

A switch module connected to the control module for cutting off the power supply of the power supply module on the PCB after receiving the control signal.

Preferably, the switch module includes a MOS transistor.

Preferably, the control module is a CPLD.

Preferably, the control module and the external power supply module are connected through an I2C bus.

Preferably, the control module and the power module are connected through GPIO.

Preferably, the temperature acquisition module is a temperature monitoring chip mounted on the surface layer of the PCB.

Preferably, the temperature acquisition module is a film-coated thermocouple temperature sensor buried in the surface layer of the PCB.

Preferably, the temperature monitoring chip is a PX8746 chip.

In order to solve the above technical problem, the present application also provides a server system, including the PCB protection system described in any one of the above.

The present application provides a PCB protection system. The temperature of the PCB is monitored by a temperature acquisition module. When the temperature of the PCB is too high, a control signal is generated by the control module to control the external power supply module to stop supplying power to the PCB, and to disconnect the channel of high current passing through the PCB. Thereby, the problem of the continuous existence of the ignition point and the accompanying fire phenomenon caused by the continuous short-circuit heating state of the PCB is avoided, and the safety of the PCB is improved. The present application also provides a server system, which has the same beneficial effects as the above-mentioned PCB protection system.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the prior art and the drawings required in the embodiments. Obviously, the drawings in the following description are only some of the drawings in the present application. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a protection system for a PCB provided by the application;

FIG. 2 is a schematic structural diagram of another PCB protection system provided by the present application.

Detailed ways

The core of this application is to provide a PCB protection system, when the temperature of the PCB is too high, the external power supply module is controlled to stop supplying power to the PCB, and the channel of high current passing through the PCB is disconnected, thereby avoiding the constant short-circuit heating of the PCB. The problem of continuous existence of the ignition point of the high temperature and the accompanying fire phenomenon improves the safety of the PCB; another core of the present application is to provide a server system including the above-mentioned protection system for the PCB.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

With the rapid increase in the amount of Internet data, the amount of calculation and the frequency of calculation increase, the functional requirements of products are also increasing, the board design inside the server is becoming more and more complex, and the number of layers of the PCB is also increasing. If the copper sheet is not firmly pasted during the manufacturing process of the PCB, it is easy to cause a short circuit or a capacitive effect. If the drilling of the PCB is not in the middle, but to one side, uneven matching will occur, or it will be easy to contact the power layer or bottom layer in the middle, resulting in potential short circuit or poor grounding factors. If the reason for the burning of the PCB is the above-mentioned short circuit or the material, the system power supply will continue to provide current, which will keep the PCB in a short-circuit heating state, the ignition point will continue to exist and accompanied by fire, and the safety is low. Based on various problems in the related art, the present application provides the protection system for the PCB through the following embodiments, which can control the external power supply module to stop supplying power to the PCB when the temperature of the PCB is too high, disconnect the channel of the high current passing through the PCB, and improve the performance of the PCB. the purpose of PCB security.

A PCB protection system provided by the present application will be introduced in detail below.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a protection system for a PCB provided by the application. The protection system for the PCB includes:

A temperature acquisition module 1 located on the surface of the PCB and used to collect the temperature of the PCB;

a control module 2 connected to the temperature acquisition module 1 for generating a control signal when the PCB temperature is greater than a preset temperature value;

An external power supply module 3 that is connected to the control module 2 and used to stop supplying power to the PCB when a control signal is received.

Specifically, in this embodiment, the temperature acquisition module 1 is arranged on the surface layer of the PCB, so that the temperature acquisition module 1 collects the PCB temperature and sends the PCB temperature to the control module 2 connected to it; the control module 2 is preset with a preset temperature value, The preset temperature value corresponds to the ignition point, and should be smaller than the temperature value corresponding to the ignition point. The control module 2 compares the PCB temperature with the preset temperature value, and when the PCB temperature is greater than the preset temperature value, a control signal is generated; the external power supply module 3 is connected to the control module 2 to receive the control signal output by the control module 2. After receiving the control signal, the external power supply module 3 will no longer supply power to the PCB, so as to achieve the purpose of disconnecting the channel of high current passing through the PCB, thereby avoiding The safety of the PCB is improved due to the continuous existence of the ignition point and the accompanying fire phenomenon caused by the continuous short-circuit heating of the PCB. The external power supply module 3 here is a power supply module in the server system, not a power supply module on the PCB. When it does not receive a control signal, it supplies power to the PCB normally. As a preferred embodiment, the control module 2 is a CPLD (Complex Programmable Logic Device, complex programmable logic device).

Specifically, as a preferred embodiment, the temperature acquisition module 1 can be a temperature monitoring chip mounted on the surface of the PCB. The temperature monitoring chip can be a PX8746 chip. This chip supports the monitoring function of Temp Sence. In this embodiment, the PX8746 is used. The temperature monitoring function of the chip collects the PCB temperature. As another preferred embodiment, the temperature acquisition module 1 may be a film-coated thermocouple temperature sensor buried in the surface layer of the PCB.

The present application provides a PCB protection system. The temperature of the PCB is monitored by a temperature acquisition module. When the temperature of the PCB is too high, a control signal is generated by the control module to control the external power supply module to stop supplying power to the PCB, and to disconnect the channel of high current passing through the PCB. Thereby, the problem of continuous existence of the ignition point and accompanying fire phenomenon caused by the PCB constantly being in a short-circuit heating state is avoided, and the safety of the PCB is improved.

Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of another PCB protection system provided by the application. The PCB protection system is based on the above-mentioned embodiment:

As a preferred embodiment, the protection system further includes:

The switch module 4 is connected to the control module 2 and used to cut off the power supply of the power supply module on the PCB after receiving the control signal.

Specifically, in this embodiment, a switch module 4 controlled by temperature changes is also set in the power module inside the PCB, and the switch module 4 is connected to the control module 2 through GPIO (General-purpose input/output, general-purpose input and output). , so as to receive the control signal output by the control module 2. After receiving the control signal, the switch module 4 is turned off to cut off the power supply path inside the PCB. It can be understood that the power module here can refer to voltage conversion modules such as DC-DC conversion modules and AC-DC conversion modules inside the PCB. By controlling the switch module 4 to be disconnected, the power supply module to the PCB load is cut off, and the PCB is further improved. security. As a preferred embodiment, the switch module 4 includes a MOS tube, which can identify the hidden danger of PCB high temperature earlier, and is easier to use in products than the traditional Fuse fuse design.

It can be understood that a PCB may include multiple power modules, therefore, a corresponding number of switch modules should be provided.

As a preferred embodiment, the control module 2 and the external power supply module 3 are connected through an I2C bus.

Specifically, a register corresponding to the PCB temperature is preset in the external power supply module 3, and the control module 2 modifies the value of the register through the I2C bus. For example, when the PCB temperature is normal, the value of the register is 0. When it is high, the control module 2 modifies the value of the register to 1, and when the controller detects that the value of the register is 1, the controller makes the external power module 3 stop supplying power to the PCB.

To sum up, this application uses the temperature monitoring function of the PX8746 chip and the added MOS circuit to actively cut off the external power supply according to the PCB temperature, actively cut off the power supply of the MOS circuit, and disconnect the channel of high current passing through the PCB. The product is fire-proof and fire-proof to ensure that no major safety accident occurs in the machine.

On the other hand, the present application also provides a server system, including the PCB protection system according to any of the above embodiments.

The server system provided by the present application has the same beneficial effects as the above-mentioned PCB protection system.

For the introduction of a server system provided by the present application, please refer to the above-mentioned embodiments, which will not be repeated in the present application.

It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Furthermore, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, article or device comprising a list of elements includes not only those elements, but also others not expressly listed elements, or also include elements inherent to such a process, article or equipment. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, article, or device that includes the element.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, this application 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 (9)

1. A protection system of a PCB, comprising:

the temperature acquisition module is arranged on the surface layer of the PCB and used for acquiring the temperature of the PCB;

the control module is connected with the temperature acquisition module, arranged on the PCB and used for generating a control signal when the temperature of the PCB is greater than a preset temperature value;

the external power supply module is connected with the control module and used for stopping supplying power to the PCB when receiving the control signal;

the protection system further comprises:

and the switch module is connected with the control module and used for cutting off the power supply of the power supply module on the PCB after receiving the control signal.

2. The protection system of the PCB of claim 1, wherein the switch module comprises a MOS transistor.

3. The PCB protection system of claim 1, wherein the control module is a CPLD.

4. The protection system of the PCB of claim 1, wherein the control module and the external power module are connected through an I2C bus.

5. The protection system of the PCB of claim 1, wherein the control module and the power module are connected through GPIO.

6. The PCB protection system of any one of claims 1-5, wherein the temperature acquisition module is a temperature monitoring chip attached to the surface layer of the PCB.

7. The PCB protection system of any one of claims 1-5, wherein the temperature acquisition module is a film-covered thermocouple temperature sensor embedded in the surface layer of the PCB.

8. The PCB protection system of claim 6, wherein the temperature monitoring chip is a PX8746 chip.

9. A server system, characterized in that it comprises a protection system of a PCB according to any of claims 1-8.

Images