CN214254185U - Distribution switch, power supply unit and photovoltaic system - Google Patents

Distribution switch, power supply unit and photovoltaic system Download PDF

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Publication number
CN214254185U
CN214254185U CN202022846112.2U CN202022846112U CN214254185U CN 214254185 U CN214254185 U CN 214254185U CN 202022846112 U CN202022846112 U CN 202022846112U CN 214254185 U CN214254185 U CN 214254185U
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power
temperature
conductive
distribution switch
power supply
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CN202022846112.2U
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Chinese (zh)
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石磊
高拥兵
王朝辉
刘云峰
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Huawei Digital Power Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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Abstract

The application discloses distribution switch, power supply unit and photovoltaic system, distribution switch includes the casing, first electrically conductive piece, second electrically conductive piece, connecting piece and radiating piece, first electrically conductive piece includes switch portion and the pin portion of electricity connection to switch portion, the pin portion is located the outside of casing and is used for the electricity to connect first electronic equipment and/or second electronic equipment, switch portion and at least part second electrically conductive piece locate in the casing, through the contact between switch portion and at least part second electrically conductive piece or separation control first electronic equipment and second electronic equipment intercommunication or disconnection, the radiating piece is located the outside of casing, the connecting piece passes the casing and connects between radiating piece and switch portion, the connecting piece is used for conducting the heat of switch portion to the radiating piece. Through setting up radiating piece and connecting piece, make the heat conduction that first electrically conductive piece and second electrically conductive piece produced to the radiating piece in order to obtain the heat dissipation to improve distribution switch's radiating effect, and then realize bigger through-current capacity.

Description

Distribution switch, power supply unit and photovoltaic system
Technical Field
The embodiment of the application relates to the technical field of power distribution, in particular to a power distribution switch, power supply equipment and a photovoltaic system.
Background
Traditional distribution switch is applied to the distribution field, and mainly used control distribution circuit's break-make, in order to save space, improves space utilization, and traditional distribution switch generally designs for less size. However, the power distribution circuit is generally used for transmitting high-power current, the high-power current can generate high heat when passing through the conventional power distribution switch, the small-sized conventional power distribution switch has a small heat dissipation area and is difficult to effectively dissipate heat, and the conventional power distribution switch is prone to failure due to high temperature under the condition of being in a working state for a long time, so that circuit breaking or other circuit problems are caused.
SUMMERY OF THE UTILITY MODEL
The application provides a distribution switch, power supply unit and photovoltaic system possesses better radiating effect.
In a first aspect, the present application provides a power distribution switch comprising a housing, a first electrically-conductive member, a second electrically-conductive member, a connecting member, and a heat sink, the first conductive piece comprises a switch part and a pin part electrically connected to the switch part, the pin part is positioned outside the shell and is used for electrically connecting first electronic equipment and/or second electronic equipment, the switch part and at least part of the second conductive piece are arranged in the shell, the first electronic device and the second electronic device are controlled to be connected or disconnected through the contact or separation between the switch part and at least part of the second conductive piece, the heat dissipation piece is located outside the shell, the connecting piece penetrates through the shell and is connected between the heat dissipation piece and the switch portion, and the connecting piece is used for conducting heat of the switch portion to the heat dissipation piece.
The utility model provides a distribution switch sets up the radiating piece through the outside at the casing to set up the connecting piece and be connected radiating piece and switch portion, make the heat that first electrically conductive piece and second electrically conductive piece produced can conduct to the radiating piece, and carry out the convection current heat dissipation through the air outside radiating piece and the casing, thereby improve distribution switch's radiating effect, and then improve distribution switch's current capacity.
In a possible embodiment, the pin portion, the switch portion, the connector and the heat sink are connected in sequence and form an integral structure. When pin portion, switch portion, connecting piece and radiating piece formula structure as an organic whole, pin portion, switch portion, connecting piece and radiating piece can be through the material integrated processing shaping of the equal preferred of heat conductivility and electric conductive property, like the shaping technology of buckling of electrically conductive reed for the heat that first electrically conductive piece and second electrically conductive piece produced can conduct to the radiating piece smoothly, and improved the structural stability between the three to a certain extent.
In a possible implementation manner, the extending direction of the first conductive component is a first direction, the extending direction of the heat dissipation component is also the first direction, and the first conductive component and the heat dissipation component are distributed on two sides of the connection component. In order to meet specific structural requirements, the heat dissipation member and the first conductive member need to be distributed on two sides of the connecting member, and in the structure, the heat dissipation member is farther away from the first electronic device or the second electronic device, so that a heat dissipation effect can be better achieved.
In a possible implementation manner, the extending direction of the first conductive component is a first direction, the extending direction of the heat dissipation component is also the first direction, and the first conductive component and the heat dissipation component are distributed on the same side of the connection component. The first direction may be parallel to the surface of the housing such that the heat sink extending in the first direction does not occupy a larger volume of space, so that the power distribution switch meets the requirement of miniaturization.
In a possible embodiment, an end of the heat dissipation element remote from the connector is electrically connected to the first electronic device and/or the second electronic device, so that the heat dissipation element and the first conductive member form a parallel circuit. When the heat dissipation member also has a better conductive performance, the heat dissipation member and the first heat conduction member can extend to the same length, namely, one end of the heat dissipation member, which is far away from the connecting member, is flush with one end of the pin part, which is far away from the switch part, so that the first heat conduction member and the heat dissipation member are both electrically connected with the first electronic device and/or the second electronic device.
In a possible embodiment, the heat sink is provided with a fastening structure for fastening the heat sink. The radiator can be used for radiating the power distribution switch so as to further improve the radiating effect of the power distribution switch. The fixing piece can be a nut so as to fixedly connect the heat radiation body and the heat radiation piece in a bolt connection mode; the fixing piece can also be of a clamping groove structure so that the heat radiation body and the heat radiation piece are fixedly connected in a clamping mode. The fixing piece is of various types, and only the corresponding connection fixing function is needed, so that specific limitation is not performed. The heat dissipation body may be a fin, a heat dissipation tube, a cooling fin, or any other heat dissipation structure that satisfies the corresponding heat dissipation requirements, which is not described herein any more.
In a possible implementation manner, the heat dissipation body is an electronic device, the connecting element and the heat dissipation element are made of conductive materials, and the connecting element and the heat dissipation element are used for transmitting the current on the first conductive element to the heat dissipation body so as to supply power to the heat dissipation body. When the heat dissipation body is an electronic device, the heat dissipation body can have a corresponding heat dissipation function only by electrifying, the connecting piece and the heat dissipation piece are made of conductive materials, and current can be conducted into the heat dissipation body through the first conductive piece through the connecting piece and the heat dissipation piece so as to supply power to the heat dissipation body and enable the heat dissipation body to have the heat dissipation function.
In a possible embodiment, the power distribution switch further includes an electrically conductive cable, and the pin portion, the switch portion, the connector, the heat sink, and the electrically conductive cable collectively form an electrically conductive path. The electric conduction cable can be connected with an electric appliance, and current flows through the pin part, the switch part, the connecting piece and the heat radiating piece in sequence and is led into the electric appliance through the electric conduction cable so as to supply power to the electric appliance.
In one possible embodiment, the number of the first conductive members is two, each of the first conductive members includes one stationary contact, the second conductive member includes two movable contacts, the two movable contacts are respectively disposed corresponding to the two stationary contacts, the pin portion of one of the first conductive members is electrically connected to the first electronic device, the pin portion of the other first conductive member is electrically connected to the second electronic device, the first electronic device and the second electronic device are controlled to be connected or disconnected by contact or separation between the two movable contacts and the two stationary contacts, and the connecting member and the heat sink are connected to the switch portion of one of the first conductive members. When the distribution switch is of the above type, the function of connecting or disconnecting the circuit can be effectively realized.
In one possible embodiment, the pin portion of the first conductive member is a first pin, the first pin is electrically connected to the first electronic device, and the second conductive member includes a second pin, the second pin is electrically connected to the second electronic device. When the distribution switch is of the above type, the distribution switch is simple in structure and can also achieve the function of connecting or disconnecting the circuit.
In a possible embodiment, the heat sink is attached to an outer surface of the housing. Because the heat dissipation piece is attached to the outer surface of the shell, the space occupied by the power distribution switch is smaller in size, and the requirement of miniaturization is met
In one possible embodiment, the housing comprises a thermally conductive material. That is, the housing is made of heat conductive material, or the housing is covered with heat conductive material. The heat in the shell can be smoothly conducted to the heat dissipation part attached to the outer surface of the shell through the shell, and the heat is dissipated through the heat dissipation part, so that the heat dissipation effect of the power distribution switch is effectively improved.
In a possible embodiment, a spacer is formed between the heat sink and the housing. Under above-mentioned structure, because the existence of compartment for the heat radiating area of radiating piece is bigger, and the gas flow space between radiating piece and the casing is bigger, is favorable to the heat dissipation of radiating piece, thereby has improved distribution switch's radiating effect to a certain extent.
In a possible embodiment, the spacer is a closed space, and the spacer is filled with a heat conducting medium. The closed interval area can effectively contain the heat-conducting medium, and when the casing is made by the heat material, the heat-conducting medium's existence is favorable to conducting the heat of casing inside to the radiating piece to the radiating effect of distribution switch has been improved to a certain extent.
In one possible implementation, the power distribution switch further includes a temperature detection unit and a temperature information feedback pin, the temperature detection unit is disposed in the casing for collecting the temperature information in the casing, and the temperature information feedback pin is electrically connected to the temperature detection unit for transmitting the temperature information to the first electronic device. Through setting up temperature detecting element and temperature information feedback foot, the temperature in the monitoring casing that can be better to effectively avoid the functional fault of the distribution switch because of the high temperature leads to. And because the main heating source in the power distribution switch is the first conductive piece and the second conductive piece, therefore, the temperature detection unit should be arranged at a position close to the first conductive piece or the second conductive piece so as to improve the accuracy of the temperature detected by the temperature detection unit. It should be noted that the temperature detection unit has various types, including but not limited to a thermistor, and may also be any component having a corresponding function, such as a thermal resistance detector, a thermocouple, and the like, which is not described herein again.
In a second aspect, the present application further provides a power supply device, where the power supply device is applied to a power distribution system, where the power distribution system includes a second electronic device, the power supply device includes a first electronic device and the power distribution switch described in any of the embodiments of the first aspect, and the power distribution switch is connected between the first electronic device and the second electronic device in a power grid.
The power supply equipment provided by the application is provided with the power distribution switch in the power supply equipment, so that the power supply equipment can be effectively cooled, the temperature in the power supply equipment can be detected and regulated in real time, and the functional fault caused by high temperature of the power supply equipment is avoided. It will be appreciated that the power distribution system may be a photovoltaic system and the second electronic device may be an ac power output assembly.
In a possible embodiment, the second electronic device is an ac output module, and the first electronic device is configured to receive dc power introduced by the dc input module, convert the dc power into ac power, and supply power to the ac output module. The first electronic equipment is connected between the direct current input assembly and the alternating current output assembly and used for receiving direct current led in by the direct current input assembly and converting the direct current into alternating current to be led out to the alternating current output assembly. It is understood that the power supply device includes, but is not limited to, an inverter, and may also be other kinds of power supply devices, which are not described in detail herein.
In one possible implementation, the first electronic device includes a power execution unit and a first control unit electrically connected to the power execution unit, the power execution unit is electrically connected to the power distribution switch, the power execution unit is configured to convert the direct current into the alternating current and output the alternating current to the second electronic device, and the first control unit controls a magnitude of the alternating current output by the power execution unit. Specifically, the power execution unit is a Direct Current/Alternating Current (DC/AC) circuit, and the power execution unit is configured to receive a Direct Current led from the Direct Current input module and convert the Direct Current into an Alternating Current to be led to the Alternating Current output module, so as to implement a corresponding Current conversion function. It can be understood that the first control unit can regulate and control the working power of the power execution unit to effectively control the current intensity of the alternating current converted and output by the power execution unit, thereby improving the controllability of the power supply device and effectively avoiding the high-temperature problem caused by overlarge current intensity.
In a possible embodiment, the first electronic device further includes a power supply unit and a second control unit electrically connected to the power supply unit, and the power distribution switch further includes a control component configured to control contact or separation between the first conductive component and the second conductive component, the power supply unit is electrically connected to the control component to supply power to the control component, and the second control unit is configured to control a magnitude of current output by the power supply unit to the control component. The control part is internally provided with a control circuit to control the contact or separation of the first conductive part and the second conductive part, and the power supply unit transmits low-power current to the control circuit in the control part to supply power to the control part. The second control unit can effectively control the current output to the control part by the power supply unit, so that the control part can have a corresponding control function, and the first conductive part and the second conductive part are controlled to be in contact or separated.
In a possible embodiment, the power distribution switch further comprises a control pin electrically connected to the control member and extending to the outside of the housing, the control pin being electrically connected to the power supply unit. The presence of the control foot facilitates the electrical connection between the control member and the power supply unit, so that the power supply unit supplies power to the control member.
In a possible implementation manner, the power supply device includes a first electronic device and the power distribution switch of the first aspect of the present invention, the power distribution switch includes a temperature detection unit and a temperature information feedback pin, the temperature detection unit is disposed in the casing for collecting temperature information in the casing, and the temperature information feedback pin is electrically connected to the temperature detection unit for transmitting the temperature information to the first electronic device. The first electronic device comprises a power execution unit and a first control unit electrically connected with the power execution unit, the power execution unit is electrically connected with the power distribution switch, the power execution unit is used for converting the direct current into the alternating current and leading the alternating current out to the second electronic device, the temperature information feedback pin extends out of the shell and is electrically connected with the first control unit so as to transmit the temperature information to the first control unit, and the first control unit controls the size of the alternating current led out by the power execution unit according to the received temperature information. Under the structure, the first control unit can effectively control the size of the alternating current led out by the power execution unit according to the temperature in the shell so as to reduce the high-temperature potential safety hazard of the power supply equipment.
In a possible implementation manner, the first control unit identifies the temperature information collected by the temperature detection unit to obtain the temperature in the casing, when the temperature in the casing is greater than or equal to a first temperature, the first control unit reduces the intensity of the alternating current derived by the power execution unit, so that the temperature in the casing is less than or equal to a second temperature, the numerical range of the first temperature is 80% -100% of the preset temperature threshold, and the second temperature is less than the first temperature. The intensity of the alternating current led out by the power execution unit is reduced, so that the temperature in the shell is slowly reduced to be lower than the first temperature, and the high-temperature potential safety hazard of the power supply equipment is reduced. The temperature threshold is usually the upper limit of the safety temperature of the power distribution switch, that is, when the temperature value in the shell is higher than the temperature threshold, the power distribution switch has certain potential safety hazard. Therefore, when the temperature value in the shell is larger than or equal to a value close to the temperature threshold value (namely, the first temperature), the first control unit reduces the alternating current led out by the power execution unit so as to slowly reduce the temperature of the power distribution switch until the temperature is reduced to a range smaller than or equal to the second temperature.
In one possible implementation, the first electronic device further includes a power supply unit and a second control unit electrically connected to the power supply unit, the power distribution switch further includes a control element, the control element is configured to control contact or separation between the first conductive element and the second conductive element, the power supply unit is electrically connected to the control element to supply power to the control element, the temperature information feedback pin extends to the outside of the housing and is electrically connected to the second control unit to transmit the temperature information to the second control unit, and the second control unit controls on/off between the power supply unit and the control element according to the received temperature information to control contact or separation between the first conductive element and the second conductive element. Under the structure, the second control unit can effectively control the current output to the control piece by the power supply unit according to the temperature in the shell so as to control the contact or separation between the first conductive piece and the second conductive piece, thereby reducing the high-temperature potential safety hazard of the power supply equipment.
In a possible implementation manner, the second control unit recognizes the temperature information collected by the temperature detection unit to obtain the temperature in the casing, when the temperature in the casing is greater than or equal to a third temperature, the second control unit turns off the current output by the power supply unit to the control element, the first conductive element is separated from the second conductive element, so that the temperature in the casing is less than or equal to a fourth temperature, the fourth temperature is less than the first temperature, the numerical range of the third temperature is 100% -110% of the preset temperature threshold, and the first temperature is 80% -100% of the preset temperature threshold. The first conductive piece and the second conductive piece are controlled to be separated by reducing the intensity of the current output to the control piece by the power supply unit, so that the temperature in the shell is quickly reduced to be lower than the first temperature, and the high-temperature potential safety hazard of power supply equipment is reduced. When the temperature value in the shell is larger than or equal to a value (namely, the second temperature) higher than the temperature threshold value, the power distribution switch is already in an extremely dangerous state, at the moment, the second control unit can reduce the current output to the control part by the power supply unit so as to control the first conductive piece to be separated from the second conductive piece, and therefore, the power distribution switch is disconnected, and the temperature of the power distribution switch is rapidly reduced until the temperature is reduced to a range smaller than or equal to the fourth temperature.
In a third aspect, the present application provides a photovoltaic system, which includes a dc input assembly, an ac output assembly, and the power supply apparatus of any of the embodiments of the second aspect, connected between the dc input assembly and the ac output assembly, for converting dc power provided by the dc input assembly into ac power and transmitting the ac power to the ac output assembly.
Drawings
FIG. 1 is a schematic diagram of a conventional power distribution switch in one embodiment;
FIG. 2 is a schematic structural diagram of an accessory switch provided herein in one embodiment;
FIG. 3 is a schematic structural view of an accessory switch provided herein in another embodiment;
FIG. 4 is a schematic right side view of the accessory switch of FIG. 3;
fig. 5 is a schematic diagram of a heat sink and housing of the power distribution switch of fig. 3 in one embodiment;
fig. 6 is a schematic diagram of a heat sink and housing of the power distribution switch of fig. 3 in another embodiment;
FIG. 7 is a schematic diagram of the configuration of the power distribution switch of FIG. 3 incorporating a temperature sensing unit and a temperature information feedback pin;
FIG. 8 is a schematic diagram of a configuration of a power distribution switch in some embodiments;
FIG. 9 is a schematic diagram of the configuration of the power distribution switch of FIG. 8 incorporating a temperature sensing unit and a temperature information feedback pin;
FIG. 10 is a schematic diagram of a power distribution switch in further embodiments;
FIG. 11 is a schematic diagram of the configuration of the power distribution switch of FIG. 10 incorporating a temperature sensing unit and a temperature information feedback pin;
FIG. 12 is a schematic diagram of a power distribution switch in further embodiments;
FIG. 13 is a schematic diagram of the configuration of the power distribution switch of FIG. 12 incorporating a temperature sensing unit and a temperature information feedback pin;
FIG. 14 is a schematic diagram of a power distribution switch in further embodiments;
fig. 15 is a schematic internal structural diagram of a power supply device according to an embodiment of the present application;
FIG. 16 is a schematic diagram of the electrical connections of the power supply apparatus in some embodiments;
fig. 17 is a schematic circuit connection diagram of a photovoltaic system provided in an embodiment of the present application.
Detailed Description
The embodiments of the present application will be described below with reference to the drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a conventional distribution switch 900 according to an embodiment; fig. 2 is a schematic diagram of a conventional power distribution switch 900 in another embodiment.
Traditional distribution switch 900 is applied to the distribution field, and mainly used control distribution circuit's break-make, in order to save space, improves space utilization, and traditional distribution switch 900 generally designs for less size. However, the power distribution circuit is generally used to transmit high power current, which generates high heat when passing through the conventional power distribution switch 900, because the small-sized conventional power distribution switch 900 has a small heat dissipation area, and the first conductive member 910 and the second conductive member 920, which mainly generate heat, are mainly located in the housing 930 of the conventional power distribution switch 900, the conventional power distribution switch 900 is difficult to effectively dissipate heat, and when the conventional power distribution switch 900 is in an operating state for a long time, the conventional power distribution switch 900 is prone to malfunction due to high temperature, thereby causing an open circuit or other circuit problems.
Referring to fig. 2, 3 and 4 together, fig. 2 is a schematic structural diagram of an accessory switch provided in the present application in one embodiment; FIG. 3 is a schematic structural view of an accessory switch provided herein in another embodiment; fig. 4 is a right side schematic view of the accessory switch of fig. 3.
The power distribution switch 100 provided in the embodiment of the present application includes a housing 10, a first conductive member 20, a second conductive member 30, a connector 50, and a heat sink 40.
Specifically, the housing 10 mainly serves to house and protect other components of the power distribution switch 100, and when the other components of the power distribution switch 100 are housed in the housing 10, structural damage caused by collision can be effectively avoided, and the presence of the housing 10 can effectively prevent dust or liquid from contacting with the other components in the power distribution switch 100, thereby avoiding circuit problems such as short circuit or open circuit.
In some embodiments, the housing 10 is made of hard plastic, so that the housing 10 has insulation performance and can maintain certain structural strength, thereby improving the safety and structural stability of the power distribution switch 100. It is understood that the material of the housing 10 includes, but is not limited to, hard plastic, and any other structure that meets the corresponding functional requirements, and is not limited in any way. It should be noted that the housing 10 may also be made of a material with a better thermal conductivity, so as to improve the heat dissipation performance of the distribution switch 100 and prevent the distribution switch 100 from malfunctioning due to high temperature.
Illustratively, the housing 10 may be cubical in shape to facilitate the preparation and installation of the housing 10. It is understood that the shape of the housing 10 includes, but is not limited to, a cubic shape, and may also be any other shape that meets the installation and accommodation requirements to be suitable for different circuit structures, which is not described in detail herein.
The first conductive member 20 includes a switching portion 21 and a pin portion 22 electrically connected to the switching portion 21, the pin portion 22 is located outside the housing 10 and is used for electrically connecting a first electronic device and/or a second electronic device, the switching portion 21 and at least a portion of the second conductive member 30 are disposed in the housing 10, the pin portion 22, the switching portion 21 and the second conductive member 30 are made of conductive materials, the first conductive member 20 and the second conductive member 30 are connected between the first electronic device and the second electronic device, and the first electronic device is controlled to be connected to or disconnected from the second electronic device by contact or separation between the switching portion 21 and the second conductive member 30.
The power distribution switch 100 provided by the present application includes two types, a first type, as shown in fig. 2, a pin portion 22 of a first conductive member 20 is a first pin, the first pin is electrically connected to a first electronic device, a second conductive member 30 includes a second pin 31, and the second pin 31 is electrically connected to a second electronic device; in the second type, as shown in fig. 3 and 4, the number of the first conductive members 20 is two, each first conductive member 20 includes one fixed contact 23, the second conductive member 30 includes two movable contacts 32, the two movable contacts 32 are respectively arranged corresponding to the two fixed contacts 23, the pin part 22 of one first conductive member 20 is electrically connected to the first electronic device, the pin part 22 of the other first conductive member 20 is electrically connected to the second electronic device, and the first electronic device is controlled to be connected to or disconnected from the second electronic device by the contact or separation between the two movable contacts 32 and the two fixed contacts 23. It should be noted that, the pin portion 22 and the stationary contact 23 may be of an integral structure, that is, the stationary contact 23 may be a protrusion on the pin portion. Similarly, the second pin 31 and the movable contact 32 may be directly formed in a single structure.
In the first type, the heat sink 40 is located outside the housing 10, and the connector 50 passes through the housing 10 and is connected between the heat sink 40 and the switching section 21, the connector 50 serving to conduct heat of the switching section 21 to the heat sink 40; in the second type, the heat sink 40 is located outside the housing 10, and the connector 50 and the heat sink 40 are connected to the switching portion 21 of one of the first conductive members 20.
It is understood that the heat sink 40 and the connection member 50 are made of materials having high thermal conductivity, so that heat generated from the first and second conductive members 20 and 30 can be better conducted to the heat sink 40 through the connection member 50 and dissipated through the heat sink 40. The heat dissipation member 40 may have various shapes as long as it can satisfy the corresponding heat dissipation function, and in some specific embodiments, the heat dissipation member 40 may have a cylindrical shape, a flat plate shape, or a grid shape, so as to increase the heat dissipation area of the heat dissipation member 40 and improve the heat dissipation effect of the power distribution switch 100.
It should be noted that, for the two types of distribution switches 100 provided in the embodiments of the present application, the structures, the distribution positions, and the connection relationships of the heat dissipation element 40 and the connection element 50 are substantially the same, and for convenience of description, only the second type of distribution switch 100 and the modifications thereof will be described in detail in the present application.
In the power distribution switch 100 provided in the embodiment of the present application, the extending direction of the first conductive element 20 is a first direction, the extending direction of the heat dissipation element 40 is also the first direction, and the first conductive element 20 and the heat dissipation element 40 are distributed on the same side of the connection element 50. In a specific embodiment, the first direction is parallel to the surface of the housing 10, so that the heat sink 40 extending along the first direction does not occupy a larger volume of space, so that the power distribution switch 100 meets the requirement of miniaturization.
Illustratively, there is a certain gap between the heat sink 40 and the housing 10, i.e., a spacer 101 is formed between the heat sink 40 and the housing 10. Under the above structure, due to the existence of the spacer 101, the heat dissipation area of the heat dissipation member 40 is larger, and the air flow space between the heat dissipation member 40 and the housing 10 is larger, which is beneficial to the heat dissipation of the heat dissipation member 40, thereby improving the heat dissipation effect of the power distribution switch 100 to a certain extent.
The distribution switch 100 provided by the embodiment of the present application, through setting up the heat dissipation member 40 outside the housing 10, and connect the heat dissipation member 40 with the switch portion 21 of the first conductive member 20 through the connecting member 50, so that the heat generated by the first conductive member 20 and the second conductive member 30 can be conducted to the heat dissipation member 40, and the heat dissipation member 40 and the air outside the housing 10 perform convection heat dissipation, thereby improving the heat dissipation effect of the distribution switch 100, and further realizing a larger through-current capability, for example: the circulating current of a conventional distribution switch (as shown in fig. 1) is 200A, the circulating current of the distribution switch provided by the application can reach 300A-400A, and the circulating capacity of the distribution switch provided by the application can be improved by more than 50% compared with that of the conventional distribution switch.
Referring to fig. 5, fig. 5 is a schematic diagram of the heat sink 40 and the housing 10 of the power distribution switch 100 shown in fig. 3 in one embodiment.
In some embodiments, a spacer 101 is formed between the heat sink 40 and the housing 10, and the spacer 101 is a closed space, and the heat conducting medium 102 is filled in the spacer 101. It will be appreciated that the enclosed compartment 101 can effectively contain the heat conducting medium 102, and when the housing 10 is made of a thermal material, the presence of the heat conducting medium 102 is beneficial to conduct the heat inside the housing 10 to the heat dissipation member 40, thereby improving the heat dissipation effect of the power distribution switch 100 to some extent.
Referring to fig. 6, fig. 6 is a schematic structural view of the heat sink 40 and the housing 10 of the power distribution switch 100 shown in fig. 3 in another embodiment.
In some embodiments, the heat sink 40 is attached to the outer surface of the housing 10. Under the above structure, since the heat sink 40 is attached to the outer surface of the housing 10, the volume of the space occupied by the power distribution switch 100 is smaller, thereby achieving the requirement of miniaturization. In one embodiment, the housing 10 comprises a heat conductive material, i.e., the housing 10 is made of a heat conductive material, or the housing 10 is covered with a heat conductive material. The heat in the casing 10 can be smoothly conducted to the heat dissipation member 40 attached to the outer surface of the casing 10 through the casing 10, and the heat is dissipated through the heat dissipation member 40, so that the heat dissipation effect of the power distribution switch 100 is effectively improved.
In some embodiments, the distribution switch 100 further includes a control member 60, and the control member 60 is used to control contact or separation between the switch part 21 and the second conductive member 30 to connect or disconnect the first electronic device with or from the second electronic device. In a specific embodiment, the power distribution switch 100 is a relay, the control member 60 has a control circuit, an electromagnet and a coil wound around the electromagnet, and the second conductive member 30 has an armature. The strength of the magnetism of the electromagnet is changed by adjusting the current output to the coil by the control circuit, so that the magnetic adsorption force of the electromagnet on the armature on the second conductive piece 30 is adjusted to drive the second conductive piece 30 to move, and the contact or separation between the second conductive piece 30 and the switch part 21 is further controlled. It is understood that the control member 60 may be in various types, including but not limited to a relay, and the control member 60 may be provided in the housing 10 to perform contact control on the second conductive member 30, and the control member 60 may be provided outside the housing 10 to perform remote control on the second conductive member 30. The kind and the positional distribution of the control member 60 are not specifically limited.
In some embodiments, the pin part 22, the switching part 21, the connector 50 and the heat sink 40 are connected in sequence and constitute an integrated structure. Specifically, when the pin portion 22, the switch portion 21, the connecting member 50 and the heat sink 40 are of an integrated structure, the pin portion 22, the switch portion 21, the connecting member 50 and the heat sink 40 can be integrally formed by a material with better heat conductivity and electrical conductivity, such as a bending process of a conductive reed, so that heat generated by the first conductive member 20 and the second conductive member 30 can be smoothly conducted to the heat sink 40, and structural stability among the three is improved to a certain extent.
It is understood that the pin part 22, the switch part 21, the connector 50 and the heat sink 40 may also be a split structure connected to each other. When the pin portion 22, the switch portion 21, the connector 50 and the heat sink 40 are connected in a split structure, the materials of the pin portion 22, the switch portion 21, the connector 50 and the heat sink 40 may be the same or different, and no specific limitation is made herein, only when the pin portion 22 and the switch portion 21 have corresponding electrical conductivity, the pin portion 22, the switch portion 21, the connector 50 and the heat sink 40 have better thermal conductivity at the same time, it can be understood that, because the pin portion 22, the switch portion 21, the connector 50 and the heat sink 40 are connected in a split structure, when one of the structures is damaged, the one can be replaced in time, so that the normal function of the distribution switch 100 is effectively ensured, and the flexibility and the fault tolerance of the distribution switch 100 are improved.
Referring to fig. 7, fig. 7 is a schematic structural diagram of the power distribution switch 100 shown in fig. 3, in combination with the temperature detection unit 71 and the temperature information feedback pin 72.
In some embodiments, the power distribution switch 100 further includes a temperature detection unit 71 and a temperature information feedback pin 72. The temperature detection unit 71 is arranged in the casing 10 to be used for collecting temperature information in the casing 10, the temperature information feedback pin 72 is electrically connected with the temperature detection unit 71 and extends out of the casing 10, and the temperature information feedback pin 72 is used for transmitting the temperature information collected by the temperature detection unit 71. It can be understood that, by providing the temperature detection unit 71 and the temperature information feedback pin 72, the temperature inside the housing 10 can be better monitored, so that the functional failure of the power distribution switch 100 caused by the over-high temperature can be effectively avoided.
It is understood that, since the main heat generating sources in the power distribution switch 100 are the first conductive member 20 and the second conductive member 30, the temperature detecting unit 71 should be disposed at a position close to the first conductive member 20 or the second conductive member 30 to improve the accuracy of the temperature detected by the temperature detecting unit 71. It should be noted that there are various types of the temperature detecting unit 71, including but not limited to a thermistor, and any component having a corresponding function, such as a thermal resistance detector, a thermocouple, and the like, which is not described herein again.
Referring to fig. 8 and 9 together, fig. 8 is a schematic diagram of a power distribution switch 100 in some embodiments; fig. 9 is a schematic diagram of the power distribution switch 100 shown in fig. 8 in combination with the temperature detection unit 71 and the temperature information feedback pin 72.
In some embodiments, an end of the heat dissipation member 40 remote from the connector 50 is electrically connected to the first electronic device and/or the second electronic device, so that the heat dissipation member 40 and the first conductive member 20 constitute a parallel circuit. It is understood that, when the heat dissipating element 40 also has a better conductive performance, the heat dissipating element 40 and the first heat conductive element may extend to the same length, that is, the end of the heat dissipating element 40 away from the connecting element 50 is flush with the end of the pin 22 away from the switch portion 21, so that the first conductive element 20 and the heat dissipating element 40 are both electrically connected to the first electronic device and/or the second electronic device, and in this structure, the first conductive element 20 and the heat dissipating element 40 are connected in parallel, so that a larger cross-sectional area is provided for current to flow through, thereby improving the current flowing capability of the power distribution switch 100.
It is understood that, as shown in fig. 9, in the power distribution switch 100 provided in the present embodiment, the temperature detection unit 71 and the temperature information feedback pin 72 may be also provided to effectively monitor the temperature inside the housing 10. The structures and connection manners of the temperature detection unit 71 and the temperature information feedback pin 72 are the same as those described in the above embodiments, and are not described herein again.
Referring to fig. 10 and 11 together, fig. 10 is a schematic structural diagram of the power distribution switch 100 in another embodiment; fig. 11 is a schematic diagram of the configuration of the power distribution switch 100 shown in fig. 10 in combination with the temperature detection unit 71 and the temperature information feedback pin 72.
In some embodiments, the extending direction of the first conductive member 20 is a first direction, the extending direction of the heat dissipation member 40 is also the first direction, and the first conductive member 20 and the heat dissipation member 40 are distributed at both sides of the connection member 50. It is understood that, in order to meet some specific structural requirements, the heat dissipation member 40 and the first conductive member 20 need to be distributed on two sides of the connection member 50, and in the above structure, the heat dissipation member 40 is farther away from the first electronic device or the second electronic device, so as to achieve better heat dissipation effect.
Also, as shown in fig. 11, in the power distribution switch 100 provided in the present embodiment, a temperature detection unit 71 and a temperature information feedback pin 72 may be also provided to effectively monitor the temperature inside the housing 10. The structures and connection manners of the temperature detection unit 71 and the temperature information feedback pin 72 are the same as those described in the above embodiments, and are not described herein again.
Referring to fig. 12 and 13 together, fig. 12 is a schematic structural diagram of the power distribution switch 100 in another embodiment; fig. 13 is a schematic diagram of the configuration of the power distribution switch 100 shown in fig. 12 in combination with the temperature detection unit 71 and the temperature information feedback pin 72.
In some embodiments, the extending direction of the first conductive member 20 is a first direction, and the extending direction of the heat dissipation member 40 is a second direction, and the first direction and the second direction form an included angle. It can be understood that, when the first direction is parallel to the surface of the casing 10, because the second direction forms an included angle with the first direction, when the heat dissipation member 40 extends along the second direction, the heat dissipation member 40 forms an included angle with the surface of the casing 10, so that a larger air flowing space is provided between the heat dissipation member 40 and the outer surface of the casing 10, which is more beneficial to heat dissipation of the heat dissipation member 40, and further improves the heat dissipation efficiency of the power distribution switch 100.
Also, as shown in fig. 13, in the power distribution switch 100 provided in the present embodiment, a temperature detection unit 71 and a temperature information feedback pin 72 may be also provided to effectively monitor the temperature inside the housing 10. The structures and connection manners of the temperature detection unit 71 and the temperature information feedback pin 72 are the same as those described in the above embodiments, and are not described herein again.
It should be noted that the extending direction of the heat dissipation member 40 outside the housing 10 includes, but is not limited to, the ones listed in the above embodiments, the heat dissipation member 40 can extend along any direction to achieve a corresponding heat dissipation effect, and the heat dissipation member 40 can extend in different directions according to different structural requirements, which is not described in detail herein.
Referring to fig. 12 and 13 again, in some embodiments, the heat dissipating member 40 is provided with a fixing structure 41, and the fixing structure 41 is used for fixing a heat dissipating member (not shown). The heat sink is used for dissipating heat of the power distribution switch 100, so as to further improve the heat dissipation effect of the power distribution switch 100.
The fixing member may be a nut, so that the heat dissipation member and the heat dissipation member 40 are fixedly connected by a bolt; the fixing member may also be a clamping groove structure, so that the heat dissipation member and the heat dissipation member 40 are fixedly connected in a clamping manner. The fixing piece is of various types, and only the corresponding connection fixing function is needed, so that specific limitation is not performed.
The heat dissipation body may be a fin, a heat dissipation tube, a cooling fin, or any other heat dissipation structure that satisfies the corresponding heat dissipation requirements, which is not described herein any more.
In some embodiments, the heat dissipation device is an electronic device, the connecting element 50 and the heat dissipation element 40 are made of conductive materials, and the connecting element 50 and the heat dissipation element 40 are used for transmitting the current on the first conductive member 20 to the heat dissipation device to supply power to the heat dissipation device. It can be understood that the heat dissipation body can have a corresponding heat dissipation function only when the heat dissipation body is powered on, the connecting member 50 and the heat dissipation member 40 are made of conductive materials, and a current can be conducted from the first conductive member 20 to the heat dissipation body through the connecting member 50 and the heat dissipation member 40 to supply power to the heat dissipation body, so that the heat dissipation body has a heat dissipation function.
Referring to fig. 14, fig. 14 is a schematic structural diagram of a power distribution switch 100 in another embodiment.
In some embodiments, the power distribution switch 100 further includes a conductive cable 42, and the pin portion 22, the switch portion 21, the connector 50, the heat sink 40, and the conductive cable 42 collectively form a conductive path. The conductive cable 42 is connected to an electrical device (not shown), and current flows through the pin 22, the switch 21, the connector 50, and the heat sink 40 in this order, and is guided to the electrical device by the conductive cable 42 to supply power to the electrical device.
Referring to fig. 15, 16 and 17, fig. 15 is a schematic internal structural diagram of a power supply apparatus 1000 according to an embodiment of the present disclosure; fig. 16 is a schematic circuit connection diagram of the power supply apparatus 1000 in some embodiments; fig. 17 is a schematic circuit connection diagram of a photovoltaic system provided in an embodiment of the present application.
The embodiment of the present application provides a power supply device 1000, where the power supply device 1000 is applied to a power distribution system, the power distribution system includes a second electronic device 400, the power supply device includes a first electronic device 300 and a power distribution switch 100 provided in the embodiment of the present application, in a specific embodiment, the power supply device 1000 further includes a circuit board 200, the first electronic device 300 and the power distribution switch 100 are both disposed on the circuit board 200, the power supply device 1000 is further electrically connected to the second electronic device 400, and the power distribution switch 100 is connected between the first electronic device 300 and the second electronic device 400, so as to control on/off of a circuit between the first electronic device 300 and the second electronic device 400. It will be appreciated that in one particular embodiment, the power distribution system is a photovoltaic system, the power supply device is used in the photovoltaic system, and the second electronic device is an ac power output assembly.
The second electronic device 400 is an ac output device, and the first electronic device 300 is configured to receive dc power introduced by the dc input device 500, convert the dc power into ac power, and supply power to the ac output device. The first electronic device 300 is connected between the dc input module 500 and the ac output module, and is configured to receive dc power introduced by the dc input module 500 and convert the dc power into ac power to be led out to the ac output module. It is understood that the power supply apparatus 1000 includes, but is not limited to, an inverter, and may also be other kinds of power supply apparatuses 1000, which are not described herein in detail, and for convenience of description, only the inverter is taken as an example for detailed description.
It can be understood that the number of the power distribution switches 100 in the power supply apparatus 1000 may be multiple, and multiple power distribution switches 100 are connected between the first electronic device 300 and the second electronic device 400, so that controllability of the power supply apparatus 1000 can be improved, and even if a certain power distribution switch 100 fails, other power distribution switches 100 can still function to control on/off of a circuit, thereby improving fault tolerance of the power supply apparatus 1000.
It should be noted that the circuit board 200 is also provided with other electronic components of the inverter, such as the power semiconductor module 210, the fan 220, the filter 230, and the like.
In some embodiments, the first electronic device 300 includes a power execution unit 310 and a first control unit 320 electrically connected to the power execution unit 310, the power execution unit 310 is electrically connected to the power distribution switch 100, the power execution unit 310 is configured to convert the direct current into an alternating current and derive the alternating current, and the first control unit 320 controls a magnitude of the alternating current derived by the power execution unit 310. In a specific embodiment, the power execution unit 310 is a Direct Current/Alternating Current (DC/AC) circuit, and the power execution unit 310 is configured to receive a Direct Current led from the Direct Current input module 500 and convert the Direct Current into an Alternating Current to be led to the Alternating Current output module, so as to implement a corresponding Current conversion function. It can be understood that the first control unit 320 can regulate and control the working power of the power execution unit 310 to effectively control the current intensity of the alternating current converted and output by the power execution unit 310, thereby improving the controllability of the power supply apparatus 1000 and effectively avoiding the high temperature problem caused by the excessive current intensity.
In some embodiments, the first electronic device 300 further includes a power supply unit 330 and a second control unit 340 electrically connected to the power supply unit 330, the power distribution switch 100 further includes a control member 60, the control member 60 is used for controlling contact or separation between the first conductive member 20 and the second conductive member 30, the power supply unit 330 is electrically connected to the control member 60 to supply power to the control member 60, and the second control unit 340 is used for controlling on/off between the power supply unit 330 and the control member 60 to contact or separate the first conductive member 20 and the second conductive member 30. It is understood that the control member 60 is internally provided with a control circuit to control the contact or separation of the first conductive member 20 with or from the second conductive member 30, and the power supply unit 330 transmits a small power current to the control circuit inside the control member 60 to supply power to the control member 60. The second control unit 340 is capable of effectively controlling the on/off of the power supply unit 330 and the control element 60, so that the control element 60 can have a corresponding control function, thereby controlling the first conductive member 20 to be in contact with or separated from the second conductive member 30.
It is understood that the power execution unit 310, the first control unit 320, the power supply unit 330 and the second control unit 340 of the first electronic device 300 are disposed on the circuit board 200, and for connection, the power distribution switch 100 further includes a control pin 61, the control pin 61 is electrically connected with the control member 60 and extends to the outside of the housing 10, and the control pin 61 extending to the outside of the housing 10 is connected to the circuit board 200 to be electrically connected with the power supply unit 330.
In some embodiments, the temperature information feedback pin 72 of the power distribution switch 100 also extends out of the housing 10 and is connected to the circuit board 200, the temperature information feedback pin 72 is electrically connected to the first control unit 320 and the second control unit 340, and the temperature information feedback pin 72 transmits the temperature information collected by the temperature detection unit 71 to the first control unit 320 and the second control unit 340. The temperature detection unit 71 and the temperature information feedback pin 72 are provided, so that the first control unit 320 and the second control unit 340 can effectively obtain the temperature in the housing 10 according to the temperature information, and perform corresponding control operation according to the temperature in the housing 10, thereby preventing the structure of the power distribution switch 100 from being damaged due to the influence of high temperature.
In some embodiments, a temperature threshold is preset in the power supply apparatus 1000, the first control unit 320 identifies the temperature information collected by the temperature detection unit 71 to obtain the temperature inside the casing 10, and when the temperature inside the casing 10 is greater than or equal to a first temperature, the first control unit 320 reduces the current derived by the power execution unit 310 so that the temperature inside the casing 10 is less than or equal to a second temperature, where the value range of the first temperature is 80% -100% of the temperature threshold, and the second temperature is less than the first temperature. For example, the temperature threshold is 85 ℃, the first temperature is 76.5 ℃, the second temperature is 67 ℃, 60 ℃, 52 ℃ or any other temperature value less than the first temperature.
The temperature threshold is generally an upper safety temperature limit of the power distribution switch 100, that is, when the temperature value in the housing 10 is higher than the temperature threshold, the power distribution switch 100 has a certain safety hazard. Therefore, when the temperature value inside the housing 10 is greater than or equal to a value close to the temperature threshold (i.e., the first temperature), the first control unit 320 decreases the current derived by the power execution unit 310, so that the temperature of the power distribution switch 100 slowly decreases until the temperature decreases to a value less than or equal to the first temperature (i.e., the second temperature). For example, when the temperature threshold is 85 ℃ and the value of the first temperature is 90% of the temperature threshold, that is, the first temperature is 76.5 ℃ and the second temperature is 60 ℃, it is detected that the temperature in the housing 10 is greater than or equal to 76.5 ℃, the first control unit 320 decreases the current derived by the power execution unit 310 until the temperature in the housing 10 decreases to 60 ℃ or below 60 ℃, and the first control unit 320 does not decrease the current derived by the power execution unit 310 any more, so that the power execution unit operates at the normal operating current.
For another example, when the temperature threshold is 85 ℃, the value of the first temperature is 100% of the temperature threshold, that is, the first temperature is 85 ℃, and the second temperature is 75 ℃, if it is detected that the temperature in the housing 10 is greater than or equal to 85 ℃, the first control unit 320 may decrease the current derived by the power execution unit 310 until the temperature in the housing 10 decreases to 75 ℃ and below 75 ℃, and the first control unit 320 does not decrease the current derived by the power execution unit 310 any more, so that the power execution unit operates at the normal operating current.
In some embodiments, a temperature threshold is preset in the power supply apparatus 1000, the second control unit 340 identifies the temperature information collected by the temperature detection unit 71 to obtain the temperature inside the casing 10, when the temperature inside the casing 10 is greater than or equal to a third temperature, the second control unit 340 turns off the current output by the power supply unit 330 to the control element 60, and the first conductive element 20 is separated from the second conductive element 30, so that the temperature inside the casing is less than or equal to a fourth temperature, wherein the fourth temperature is less than the first temperature, the value range of the third temperature is 100% -110% of the temperature threshold, and the first temperature is 80% -100% of the preset temperature threshold. For example, the temperature threshold is 85 ℃, the first temperature is 76.5 ℃, the third temperature is 85 ℃, the fourth temperature is 67 ℃, 60 ℃, 52 ℃ and other arbitrary temperature values smaller than the first temperature. It is to be understood that the third temperature may be the same as or different from the fourth temperature, and is not particularly limited herein.
It should be noted that, when the temperature value inside the casing 10 is greater than or equal to a certain value (i.e. the second temperature) higher than the temperature threshold value, the distribution switch 100 is already in an extremely dangerous state, and at this time, the second control unit 340 turns off the current output from the power supply unit 330 to the control element 60 to control the first conductive element 20 to be separated from the second conductive element 30, so as to turn off the distribution switch 100, so that the temperature of the distribution switch 100 is rapidly decreased until the temperature is decreased to a range smaller than the first temperature.
For example, when the temperature threshold is 85 ℃, the first temperature is 90% of the temperature threshold, that is, the first temperature is 76.5 ℃, the third temperature is 100% of the temperature threshold, that is, the third temperature is 85 ℃, and the fourth temperature is 50 ℃, if it is detected that the temperature in the housing 10 is greater than or equal to 85 ℃, the second control unit 340 turns off the current output from the power supply unit 330 to the control unit 60, so as to separate the first conductive member 20 from the second conductive member 30, until the temperature in the housing 10 is reduced to 50 ℃ or below 50 ℃, and the control unit 340 turns on the current output from the power supply unit 330 to the control unit 60, so that the first conductive member 20 is in contact with the second conductive member 30.
For another example, when the temperature threshold is 85 ℃, the first temperature is 100% of the temperature threshold, that is, the first temperature is 85 ℃, the second temperature is 110% of the temperature threshold, that is, the second temperature is 93.5 ℃, and the fourth temperature is 84.5 ℃, if the temperature in the housing 10 is detected to be greater than or equal to 93.5 ℃, the second control unit 340 turns off the current output from the power supply unit 330 to the control unit 60, so as to separate the first conductive member 20 from the second conductive member 30, until the temperature in the housing 10 is reduced to 84.5 ℃ and below 84.5 ℃, and the control unit 340 turns on the current output from the power supply unit 330 to the control unit 60, so as to contact the first conductive member 20 with the second conductive member 30.
It is understood that the first control unit 320 and the second control unit 340 may be the same component having two control functions, or may be two separate components each having one control function, and are not limited in detail herein.
In a specific embodiment, the power supply apparatus 1000 is an inverter, which is a power conditioning device composed of semiconductor devices, mainly used for converting dc power into ac power, and generally composed of a boost circuit and an inverter bridge circuit. The boosting circuit boosts the direct-current voltage of the solar battery to the direct-current voltage required by the output control of the inverter; the inverter bridge circuit equivalently converts the boosted direct-current voltage into alternating-current voltage with common frequency.
When the power supply apparatus 1000 is applied to the field of photovoltaic power generation, the power supply apparatus 1000 is a photovoltaic inverter, and it can be understood that the output of the solar cell module varies with the intensity of solar radiation and the temperature of the solar cell module itself (chip temperature). In addition, since the solar cell module has a characteristic that the voltage decreases as the current increases, there is an optimum operating point at which maximum power can be obtained. The intensity of the solar radiation is changing and it is clear that the optimum operating point is also changing. Relative to the changes, the working point of the solar cell assembly is always positioned at the maximum power point, the system always obtains the maximum power output from the solar cell assembly, and the control is the maximum power tracking control. Therefore, the photovoltaic inverter is characterized by including a Maximum Power Point Tracking (MPPT) function.
The power supply device 1000 provided by the embodiment of the present application, through installing the power distribution switch 100 provided by the embodiment of the present application in the power supply device 1000, enables the power supply device 1000 to be effectively cooled, and enables the temperature in the power supply device 1000 to be detected and regulated in real time, thereby avoiding the functional failure of the power supply device 1000 caused by high temperature.
Referring to fig. 17 again, the embodiment of the present application provides a photovoltaic system 2000, the photovoltaic system 2000 includes a dc input module 500, an ac output module (i.e., the second electronic device 400), and a power supply device 1000 according to the embodiment of the present application, and the power supply device 1000 is connected between the dc input module 500 and the ac output module for converting dc power provided by the dc input module 500 into ac power and transmitting the ac power to the ac output module. The direct current input module 500 is a device for leading out direct current from the photovoltaic power generation end, and the alternating current output module is a device for leading in alternating current from the power grid.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application; the embodiments and features of the embodiments of the present application may be combined with each other without conflict. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (25)

1. The utility model provides a distribution switch, its characterized in that includes casing, first electrically conductive piece, second electrically conductive piece, connecting piece and radiating piece, first electrically conductive piece includes switch portion and electricity is connected to the pin portion of switch portion, the pin portion is located the outside of casing just is used for the electricity to connect first electronic equipment and/or second electronic equipment, switch portion and at least part second electrically conductive piece is located in the casing, through switch portion and at least part contact or separation control between the second electrically conductive piece first electronic equipment with second electronic equipment intercommunication or disconnection, the radiating piece is located the outside of casing, the connecting piece passes the casing and connects the radiating piece with between the switch portion, the connecting piece is used for with the heat conduction of switch portion to the radiating piece.
2. The power distribution switch of claim 1, wherein the pin section, the switch section, the connector and the heat sink are connected in sequence and form an integral structure.
3. The power distribution switch of claim 1, wherein the first conductive member extends in a first direction and the heat sink extends in the first direction, the first conductive member and the heat sink being disposed on opposite sides of the connector.
4. The power distribution switch of claim 1, wherein the first conductive element extends in a first direction and the heat dissipation element extends in the first direction, and the first conductive element and the heat dissipation element are disposed on a same side of the connecting element.
5. The electrical distribution switch of claim 4, wherein an end of the heat sink remote from the connector is electrically connected to the first and/or second electronic device such that the heat sink and the first electrically conductive member form a parallel circuit.
6. The electrical distribution switch of claim 1, wherein the heat sink has a securing structure for securing the heat sink.
7. The power distribution switch of claim 6, wherein the heat sink is an electronic device, the connector and the heat sink are made of conductive materials, and the connector and the heat sink are configured to transfer the current on the first conductive member to the heat sink to supply power to the heat sink.
8. The electrical distribution switch of claim 1, further comprising an electrically conductive cable, the pin portion, the switch portion, the connector, the heat sink, and the electrically conductive cable collectively comprising an electrically conductive path.
9. The power distribution switch according to claim 1, wherein the number of the first conductive members is two, each of the first conductive members includes one stationary contact, the second conductive member includes two movable contacts, the two movable contacts are respectively provided corresponding to the two stationary contacts, the pin portion of one of the first conductive members is electrically connected to the first electronic device, the pin portion of the other of the first conductive members is electrically connected to the second electronic device, the first electronic device is controlled to be connected to or disconnected from the second electronic device by contact or separation between the two movable contacts and the two stationary contacts, and the connecting member and the heat sink are connected to the switch portion of one of the first conductive members.
10. The power distribution switch of claim 1, wherein the pin portion of the first conductive member is a first pin that is electrically connected to the first electronic device, and wherein the second conductive member includes a second pin that is electrically connected to the second electronic device.
11. The power distribution switch of claim 1, wherein the heat sink is attached to an outer surface of the housing.
12. The electrical distribution switch of claim 11, wherein the housing comprises a thermally conductive material.
13. The electrical distribution switch of claim 1, wherein the heat sink and the housing form a spacer therebetween.
14. The electrical distribution switch of claim 13, wherein the compartment is an enclosed space, and wherein the compartment is filled with a thermally conductive medium.
15. The power distribution switch according to any of claims 1-14, further comprising a temperature detection unit disposed within the housing for collecting temperature information within the housing, and a temperature information feedback pin electrically connected to the temperature detection unit for transmitting the temperature information to the first electronic device.
16. A power supply device for use in a power distribution system including a second electronic device, the power supply device including a first electronic device and a power distribution switch as claimed in any one of claims 1 to 15 connected between the first electronic device and the second electronic device in an electrical network.
17. The power supply apparatus according to claim 16, wherein the second electronic apparatus is an ac power output module, and the first electronic apparatus is configured to receive dc power from the dc power input module, convert the dc power into ac power, and supply power to the ac power output module.
18. The power supply device according to claim 17, wherein the first electronic device includes a power execution unit and a first control unit electrically connected to the power execution unit, the power execution unit is electrically connected to the power distribution switch, the power execution unit is configured to convert the direct current into the alternating current and output the alternating current to the second electronic device, and the first control unit is configured to control a magnitude of the alternating current output by the power execution unit.
19. The power supply device of claim 18, wherein the first electronic device further comprises a power supply unit and a second control unit electrically connected to the power supply unit, wherein the power distribution switch further comprises a control member for controlling contact or separation between the first conductive member and the second conductive member, wherein the power supply unit is electrically connected to the control member to supply power to the control member, and wherein the second control unit is configured to control on/off of the power supply unit and the control member.
20. The power supply apparatus of claim 19 wherein the power distribution switch further comprises a control pin electrically connected to the control member and extending outside of the housing, the control pin being electrically connected to the power supply unit.
21. A power supply device, for use in a power distribution system, the power distribution system including a second electronic device, the power supply device comprising a first electronic device and the power distribution switch of claim 15, the first electronic device comprising a power execution unit and a first control unit electrically connected to the power execution unit, the power execution unit is electrically connected with the power distribution switch and is used for converting the direct current into the alternating current and leading the alternating current out to the second electronic equipment, the temperature information feedback pin extends out of the shell and is electrically connected with the first control unit, so as to transmit the temperature information to the first control unit, and the first control unit controls the size of the alternating current derived by the power execution unit according to the received temperature information.
22. The power supply device according to claim 21, wherein the first control unit identifies the temperature information collected by the temperature detection unit to obtain the temperature in the housing, and when the temperature in the housing is greater than or equal to a first temperature, the first control unit decreases the intensity of the alternating current derived by the power execution unit so that the temperature in the housing is less than or equal to a second temperature, the value range of the first temperature is 80% -100% of a preset temperature threshold, and the second temperature is less than the first temperature.
23. The power supply device of claim 21, wherein the first electronic device further comprises a power supply unit and a second control unit electrically connected to the power supply unit, the power distribution switch further comprises a control member for controlling contact or separation between the first conductive member and the second conductive member, the power supply unit is electrically connected to the control member to supply power to the control member, the temperature information feedback pin extends out of the housing and is electrically connected to the second control unit to transmit the temperature information to the second control unit, and the second control unit controls on/off between the power supply unit and the control member according to the received temperature information to control contact or separation between the first conductive member and the second conductive member.
24. The power supply device according to claim 23, wherein the second control unit identifies the temperature information collected by the temperature detection unit to obtain the temperature in the housing, and when the temperature in the housing is greater than or equal to a third temperature, the second control unit turns off the current output by the power supply unit to the control component, the first conductive component is separated from the second conductive component, so that the temperature in the housing is less than or equal to a fourth temperature, the fourth temperature is less than the first temperature, the third temperature has a value range of 100% -110% of a preset temperature threshold, and the first temperature is 80% -100% of the preset temperature threshold.
25. A photovoltaic system comprising a dc input assembly, an ac output assembly and the power supply apparatus of any one of claims 16-24 connected between the dc input assembly and the ac output assembly for converting dc power provided by the dc input assembly to ac power for transmission to the ac output assembly.
CN202022846112.2U 2020-11-30 2020-11-30 Distribution switch, power supply unit and photovoltaic system Active CN214254185U (en)

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