Power supply device and system

Abstract

The utility model discloses a power supply device and system. The power supply device comprises a DC power plug, a first lead, a second lead, a power supply unit and a voltage detection unit. The first ends of the first wire and the second wire are respectively connected to one electrode of the direct-current power plug, and the second ends of the first wire and the second wire are respectively connected with the voltage detection unit; the direct-current power plug supplies power to the voltage detection unit through the power unit; the voltage detection unit is configured to detect a potential difference between the first conductive line and the second conductive line, the potential difference being used to determine a temperature of the electrode.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of power supply, and in particular to a power supply device and system. Background Art

[0002] DC plugs have become an indispensable item in human life. During the use of the product, the DC plug may be contaminated (such as water, dust, etc.) and a micro short circuit may form between the two electrodes of the DC plug (micro short circuit: compared with the traditional short circuit, the current of the micro short circuit is small). The micro short circuit current is small and cannot reach the overcurrent or overvoltage protection threshold of the power adapter, so it is difficult to trigger the overcurrent or overvoltage protection. The micro short circuit will cause heat to be generated on the two electrodes of the DC plug. A large amount of heat can easily damage the equipment, burn the circuit, and even cause a fire.

[0003] The DC plug has a simple structure, small size and strong versatility. Adding an additional detection function to the DC plug will bring great challenges and investment, and will also reduce the versatility of the DC plug.

[0004] In the prior art, it is difficult to conveniently determine whether a DC plug has a micro-short circuit without changing the structure of the DC plug. Utility Model Content

[0005] The utility model provides a power supply device and a system, which can achieve the purpose of conveniently determining whether a short circuit occurs in an electrode without changing the structure of a DC power supply plug.

[0006] In a first aspect, an embodiment of the present utility model provides a power supply device, comprising:

[0007] A DC power plug, a first wire, a second wire, a power supply unit, and a voltage detection unit;

[0008] The first ends of the first wire and the second wire are respectively connected to one electrode of the DC power plug, and the second ends of the first wire and the second wire are respectively connected to the voltage detection unit;

[0009] The DC power plug supplies power to the voltage detection unit through the power supply unit;

[0010] The voltage detection unit is configured to detect a potential difference between the first conductive line and the second conductive line, and the potential difference is used to determine a temperature of the electrode.

[0011] Optionally, it further includes a control unit, and the DC power plug also supplies power to the control unit through the power unit;

[0012] The voltage detection unit is also connected to the control unit;

[0013] The control unit is configured to determine the temperature of the electrode according to the potential difference, and determine whether the DC power plug is short-circuited according to the temperature of the electrode.

[0014] Optionally, the power supply unit includes a first power supply module and a second power supply module;

[0015] The DC power plug is connected to the voltage detection unit through the first power module;

[0016] The DC power plug is connected to the control unit through the second power module.

[0017] Optionally, a communication isolation device is also included;

[0018] The voltage detection unit is connected to the control unit through the communication isolation device.

[0019] Optionally, the first power supply module adopts an isolated power supply.

[0020] Optionally, it further includes a temperature detection unit, wherein the temperature detection unit is connected to the control unit;

[0021] The temperature detection unit is used to detect the ambient temperature, and the control unit is configured to determine the temperature of the electrode according to the potential difference and the ambient temperature.

[0022] Optionally, the voltage detection unit includes a signal conditioning module, a digital-to-analog conversion module, and an isolation module;

[0023] The second ends of the first wire and the second wire are respectively connected to the signal conditioning module, the signal conditioning module is connected to the isolation module through the digital-to-analog conversion module, and the isolation module is connected to the communication isolation device.

[0024] In a second aspect, an embodiment of the utility model further provides a system, comprising any power supply device recorded in the embodiment of the utility model.

[0025] Optionally, it also includes a functional circuit unit, which includes a hardware circuit for implementing a preset system function.

[0026] Optionally, a system power supply unit is also included;

[0027] The DC power plug also supplies power to the functional circuit unit through the power supply unit or the system power supply unit.

[0028] Compared with the prior art, the beneficial effect of the present invention is as follows: the present invention proposes a power supply device, which includes a DC power plug, a power supply unit, and a voltage detection unit, wherein a first wire and a second wire of different materials are arranged on the electrode of the DC power plug, and based on the voltage detection unit, the potential difference between the first wire and the second wire can be determined, and then the temperature of the electrode can be determined, and whether the electrode is short-circuited can be determined by the temperature of the electrode. Based on this solution, the temperature on the electrode can be conveniently measured without changing the structure of the DC power plug. When the temperature is too high, it can be determined that the electrode is short-circuited, and timely inspection can be carried out to avoid accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a structural block diagram of a power supply device in an embodiment;

[0030] Figure 2 is a structural block diagram of another power supply device in the embodiment;

[0031] Figure 3 It is a system structure block diagram in the embodiment. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] Embodiment 1

[0034] Figure 1 is a structural block diagram of the power supply device in the embodiment, refer to Figure 1 , the power supply device comprises:

[0035] A DC power plug 100, a first wire, a second wire, a power supply unit 200, and a voltage detection unit 300;

[0036] The first ends of the first wire and the second wire are respectively connected to an electrode of the DC power plug 100, and the second ends of the first wire and the second wire are respectively connected to the voltage detection unit 300;

[0037] The DC power plug 100 supplies power to the voltage detection unit 300 through the power supply unit 200;

[0038] The voltage detection unit 300 is configured to detect a potential difference between the first conductive line and the second conductive line, and the potential difference is used to determine the temperature of the electrode.

[0039] In this embodiment, the first wire and the second wire are set to be made of different materials, wherein the first ends of the first wire and the second wire are respectively connected to an electrode of the DC power plug 100, and a potential difference can be generated between the first wire and the second wire based on the loop formed by the wires of different materials;

[0040] When the temperature of the electrode changes, the potential difference between the first wire and the second wire changes accordingly.

[0041] In this embodiment, the specific design of the voltage detection unit 300 is not limited. For example, it can be implemented by a voltage detection chip or any voltage sampling circuit.

[0042] In this embodiment, there is no improvement on the software method. For example, based on the above potential difference, the potential difference can be used in the following manner to determine the temperature of the electrode:

[0043] Through actual circuits and temperature measurement tools, the voltage (potential) difference between the two materials corresponding to the electrode at different temperatures is measured, and these values ​​are established in a table to determine the corresponding electrode temperature.

[0044] In this embodiment, the structure of the power supply unit is not limited. The power supply unit 200 can be designed based on a power supply chip. The power supply unit 200 can realize functions such as input voltage conversion (such as boosting and bucking) and voltage stabilization.

[0045] This embodiment provides a power supply device, which includes a DC power plug, a power supply unit, and a voltage detection unit, wherein a first wire and a second wire of different materials are arranged on the electrode of the DC power plug, and the potential difference between the first wire and the second wire can be determined based on the voltage detection unit, and then the temperature of the electrode can be determined. The temperature of the electrode can be used to determine whether a short circuit occurs in the electrode. Based on this solution, the temperature on the electrode can be conveniently measured without changing the structure of the DC power plug. When the temperature is too high, it can be determined that a short circuit occurs in the electrode, and timely inspection can be carried out to avoid accidents.

[0046] exist Figure 1 On the basis of the scheme shown, in one possible implementation, the power supply device further includes a control unit, and the DC power plug 100 also supplies power to the control unit through the power supply unit 200;

[0047] The voltage detection unit 300 is also connected to the control unit;

[0048] The control unit is configured to determine the temperature of the electrode through the potential difference, and determine whether a short circuit occurs in the DC power plug 100 through the temperature of the electrode.

[0049] Exemplarily, in this solution, the control unit is configured to store the aforementioned table, and the control unit is configured to determine the temperature of the electrode according to the potential difference by looking up the table, and when the temperature exceeds a preset temperature, it is determined that the DC power plug 100 is short-circuited.

[0050] Further, based on the solution that the power supply device includes a control unit, in one possible implementation, the power supply device also includes a temperature detection unit, and the temperature detection unit is connected to the control unit;

[0051] The temperature detection unit is used to detect the ambient temperature, and the control unit is configured to determine the temperature of the electrode through the potential difference and the ambient temperature.

[0052] Exemplarily, in this solution, the control unit may be configured to determine the temperature of the electrode in the following manner:

[0053]

[0054] Where V is the voltage (potential) difference between the first wire and the second wire, S is the Seebeck coefficient in V / K (usually in μV / ℃), and T h is the electrode temperature, T c is the ambient temperature.

[0055] Exemplarily, in this solution, it is assumed that S is related to the materials of the two conductors, and S has nonlinearity;

[0056] Among them, the voltage difference between the two materials and the ambient temperature corresponding to the electrode at different temperatures are measured through actual circuits and temperature measurement tools, and the corresponding S value is calculated, and a table is established by combining these values;

[0057] When actually determining the electrode temperature, based on V, S and T c , determine the corresponding electrode temperature by looking up the table.

[0058] On the basis of the solution that the power supply device includes a control unit, in one possible implementation, the power supply unit includes a first power module and a second power module;

[0059] The DC power plug 100 is connected to the voltage detection unit through a first power module; the DC power plug 100 is connected to the control unit through a second power module.

[0060] In this solution, the structure of the first power module can be the same as or different from that of the second power module. The first power module and the second power module are used to independently power the voltage detection unit and the control unit, respectively, which can improve the power reliability of each unit.

[0061] Based on the solution that the power supply device includes a control unit, in one possible implementation scheme, the power supply device also includes a communication isolation device;

[0062] The voltage detection unit is connected to the control unit through a communication isolation device.

[0063] Exemplarily, in this solution, the communication isolation device may be a digital isolator, wherein the communication interface configured by the digital isolator and the specific model used are not limited. For example, the model of the digital isolator may be IS3020S, 3722HS, etc.;

[0064] By implementing the communication between the voltage detection unit and the control unit through the communication isolation device, the communication quality can be guaranteed, the influence of signal noise on the communication can be avoided, and the accuracy of temperature judgment can be improved.

[0065] Further, based on the solution that the power supply unit includes a first power supply module and a second power supply module, in one possible implementation scheme, the first power supply module adopts an isolated power supply.

[0066] In this solution, the DC power plug 100 is connected to the voltage detection unit 300 via an isolated power supply, and noise isolation between the input power of the DC power plug 100 and the voltage detection unit 300 can be achieved based on the isolated power supply.

[0067] Further, on the basis that the power supply device includes a communication isolation device, in one possible implementation, the voltage detection unit includes a signal conditioning module, a digital-to-analog conversion module, and an isolation module;

[0068] The second ends of the first wire and the second wire are respectively connected to the signal conditioning module, the signal conditioning module is connected to the isolation module through the digital-to-analog conversion module, and the isolation module is connected to the communication isolation device.

[0069] Exemplarily, in this solution, the signal conditioning module can be used to implement signal filtering, amplification, etc., the digital-to-analog conversion module is used to implement the conversion of analog signals into digital signals, and the isolation module is used to implement isolated transmission of signals.

[0070] Exemplarily, in this solution, there is no limitation on the design of the signal conditioning module, the digital-to-analog conversion module, and the isolation module, and the types of corresponding chips, which can be freely selected according to needs.

[0071] Figure 2 is another structural block diagram of a power supply device in the embodiment, refer to Figure 2 Based on any of the above solutions, in one possible implementation scheme, the power supply device includes:

[0072] A DC power plug 100, a first power module 201, a second power module 202, a signal conditioning module 301, a temperature detection unit 302, a digital-to-analog conversion module 303, an isolation module 304, a communication isolation device 305, and a control chip 400;

[0073] The DC power plug 100 is connected to the digital-to-analog conversion module 303 through the signal conditioning module 301, the digital-to-analog conversion module 303 is connected to the communication isolation device 305 through the isolation module 304, the communication isolation device 305 is connected to the control chip 400, and the temperature detection unit 302 is connected to the digital-to-analog conversion module 303;

[0074] The DC power plug 100 is connected to the second power module 202 through the first power module 201, and the second power module 202 is configured to power the control chip 400, the signal conditioning module 301, the temperature detection unit 302, the digital-to-analog conversion module 303, the isolation module 304, and the communication isolation device 305.

[0075] In this solution, the first ends of the first wire and the second wire are respectively connected to the positive electrode of the DC power plug;

[0076] The second ends of the first wire and the second wire are respectively connected to the signal conditioning module 301, and the signal conditioning module 301 is configured to collect the potential difference between the first wire and the second wire, and filter and amplify the voltage signal;

[0077] The digital-to-analog conversion module 303 is configured to receive the (analog) potential difference signal and the (analog) ambient temperature signal, and convert the above analog signals into digital signals respectively;

[0078] An isolation module 304 and a communication isolation device 305 are configured to realize the isolation transmission of the above digital signal, wherein the isolation module 304 may include isolation components such as an optical coupler, and the communication isolation device 305 may include an IIC communication module;

[0079] The configuration control chip 400 determines the electrode temperature, specifically, based on V (potential difference), S (Seebeck coefficient) and T c (ambient temperature), and determine the corresponding electrode temperature by looking up the table.

[0080] In this solution, the first power module 201 is configured as an isolated power supply, and the second power module 202 is configured to achieve secondary conversion of the input voltage.

[0081] Embodiment 2

[0082] This embodiment proposes a system, including any one of the power supply devices recorded in the first embodiment. The implementation process and beneficial effects of the power supply device are the same as the corresponding contents recorded in the first embodiment, and the specific contents will not be described in detail.

[0083] Furthermore, in a possible implementation scheme, the system also includes a functional circuit unit, and the functional circuit unit includes a hardware circuit for implementing a preset system function.

[0084] Exemplarily, in this solution, the functions and design methods specifically implemented by the functional circuit unit are not limited. For example, the system can be configured to be used as a mobile phone charging port, a router, an electronic product with an adapter, etc.;

[0085] Correspondingly, the functional circuit units are configured to implement the functions specified by the above-mentioned electronic devices, such as charging detection, data communication, voltage conversion, etc.

[0086] Figure 3 is a system structure diagram in the embodiment, refer to Figure 3 In one possible implementation, the system includes:

[0087] DC power plug 100, power supply unit 200, system power supply unit 203, signal conditioning module 301, temperature detection unit 302, digital-to-analog conversion module 303, isolation module 304, communication isolation device 305, functional circuit unit 500;

[0088] The DC power plug 100 is connected to the digital-to-analog conversion module 303 through the signal conditioning module 301, the digital-to-analog conversion module 303 is connected to the communication isolation device 305 through the isolation module 304, the communication isolation device 305 is connected to the functional circuit unit 500, and the temperature detection unit 302 is connected to the digital-to-analog conversion module 303;

[0089] The DC power plug 100 is connected to the system power unit 203 through the power unit 200, and the system power unit 203 is configured to power the functional circuit unit 500, the signal conditioning module 301, the temperature detection unit 302, the digital-to-analog conversion module 303, the isolation module 304, and the communication isolation device 305.

[0090] In this solution, the power supply unit 200 is configured as a main power supply (for example, its model may be TD1509), and the system power supply unit 203 is an isolated power supply;

[0091] The configuration function circuit unit 500 is used to implement a preset system function and determine whether a short circuit occurs in an electrode.

[0092] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A power supply device, It is characterized in that include: A DC power plug, a first wire, a second wire, a power supply unit, and a voltage detection unit; The first ends of the first wire and the second wire are respectively connected to one electrode of the DC power plug, and the second ends of the first wire and the second wire are respectively connected to the voltage detection unit; The DC power plug supplies power to the voltage detection unit through the power supply unit; The voltage detection unit is configured to detect a potential difference between the first conductive line and the second conductive line, and the potential difference is used to determine a temperature of the electrode.

2. The power supply device according to claim 1, It is characterized in that It also includes a control unit, and the DC power plug also supplies power to the control unit through the power supply unit; The voltage detection unit is also connected to the control unit; The control unit is configured to determine the temperature of the electrode according to the potential difference, and determine whether the DC power plug is short-circuited according to the temperature of the electrode.

3. The power supply device according to claim 2, It is characterized in that The power supply unit includes a first power supply module and a second power supply module; The DC power plug is connected to the voltage detection unit through the first power module; The DC power plug is connected to the control unit through the second power module.

4. The power supply device according to claim 2, It is characterized in that Also included are communications isolation devices; The voltage detection unit is connected to the control unit through the communication isolation device.

5. The power supply device according to claim 3, It is characterized in that The first power supply module adopts an isolated power supply.

6. The power supply device according to claim 2, It is characterized in that It also includes a temperature detection unit, which is connected to the control unit; The temperature detection unit is used to detect the ambient temperature, and the control unit is configured to determine the temperature of the electrode according to the potential difference and the ambient temperature.

7. The power supply device according to claim 4, It is characterized in that The voltage detection unit includes a signal conditioning module, a digital-to-analog conversion module, and an isolation module; The second ends of the first wire and the second wire are respectively connected to the signal conditioning module, the signal conditioning module is connected to the isolation module through the digital-to-analog conversion module, and the isolation module is connected to the communication isolation device.

8. A power supply system, It is characterized in that A power supply device comprising any one of claims 1 to 7.

9. The power supply system according to claim 8, It is characterized in that It also includes a functional circuit unit, which includes a hardware circuit that implements a preset system function.

10. The power supply system according to claim 9, It is characterized in that Also included is a system power supply unit; The DC power plug also supplies power to the functional circuit unit through the power supply unit or the system power supply unit.

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