High-voltage box

Abstract

The utility model discloses a high-voltage box, and belongs to the field of electrical technology. The high-voltage box comprises a heat conduction box body, and a switching power supply, a temperature control assembly, a cooling fan assembly, a fuse and a power supply loop which are located in the heat conduction box body. Wherein an air outlet of the heat dissipation fan assembly faces the fuse, the temperature control assembly can be arranged adjacent to the fuse, when it is detected that the temperature of the fuse is larger than a first threshold temperature, the temperature control assembly can start the heat dissipation fan assembly to dissipate heat of the fuse, and when the temperature of the fuse is smaller than or equal to a second threshold temperature, the temperature control assembly closes the heat dissipation fan assembly; thus, the heat dissipation speed of the fuse can be accelerated, the high-voltage box can be in a normal working state, the problem that the heat dissipation effect of the high-voltage box in the related technology is poor can be solved, the heat dissipation fan assembly can be prevented from being in a running state for a long time, the service life of the heat dissipation fan assembly is prolonged, and energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical technology field especially relates to a high voltage box. BACKGROUND

[0002] The energy storage system comprises an energy storage battery pack and a high voltage box, the high voltage box can connect the energy storage battery pack with an external power system to realize input and output of electric energy. The high voltage box can receive electric energy from a power grid or a renewable energy power generation system and store the electric energy into the energy storage battery; at the same time, the electric energy in the energy storage battery can be delivered back to the power grid or supplied to a load.

[0003] When the energy storage system is short-circuited, a protection device is arranged in the high voltage box to protect the energy storage system from short circuit. The high voltage box usually has a ventilation hole on the box body to dissipate heat of components in the high voltage box, but the heat dissipation effect of this heat dissipation mode is poor. SUMMARY

[0004] The utility model embodiment provides a kind of high voltage box.The technical solution is as follows:

[0005] The high voltage box includes heat-conducting box body and switch power supply, temperature control component, heat dissipation fan component, fuse and power supply loop in the heat-conducting box body;

[0006] The switch power supply is electrically connected with the heat dissipation fan component and the temperature control component respectively;

[0007] The heat dissipation fan component is electrically connected with the temperature control component, the air outlet of the heat dissipation fan component is towards the fuse, and the temperature control component is arranged adjacent to the fuse;

[0008] The power supply loop is electrically connected with the fuse;

[0009] When the temperature control component detects that the temperature of the fuse is greater than a first threshold temperature, a first voltage level is output to turn on the heat dissipation fan component, and when the temperature of the fuse is less than or equal to a second threshold temperature, a second voltage level is output to turn off the heat dissipation fan component, and the second threshold temperature is less than or equal to the first temperature threshold.

[0010] Optionally, the temperature control component includes a temperature sensor and a comparator, the temperature sensor is electrically connected with the comparator, and the comparator is electrically connected with the heat dissipation fan component.

[0011] Optionally, the temperature sensor is arranged adjacent to the fuse, and the distance between the temperature sensor and the fuse is less than or equal to 60 mm.

[0012] Optionally, the heat dissipation fan assembly comprises a heat dissipation fan and a first switch, and the heat dissipation fan is electrically connected with the first switch.

[0013] The first switch has a control end, an input end and an output end.

[0014] The control end is electrically connected with the comparator, the input end is electrically connected with the switching power supply, and the output end is electrically connected with the heat dissipation fan.

[0015] Optionally, the heat dissipation fan is arranged adjacent to the fuse, and the distance between the heat dissipation fan and the fuse ranges from 40 mm to 100 mm.

[0016] Optionally, the switching power supply comprises an AC-DC converter, an input end of the AC-DC converter is electrically connected with an AC power supply, and an output end of the AC-DC converter is electrically connected with the heat dissipation fan assembly and the temperature control assembly.

[0017] Optionally, the high-voltage box further comprises an alarm unit, the alarm unit is electrically connected with the temperature control assembly, and the alarm unit is configured to issue an alarm according to the output level of the temperature control assembly.

[0018] Optionally, the alarm unit comprises at least one of a sound alarm assembly, an optoelectronic alarm assembly and a remote alarm assembly.

[0019] The sound alarm assembly and the optoelectronic alarm assembly are located outside the box body.

[0020] The remote alarm assembly is located in a monitoring room.

[0021] Optionally, the fuse comprises a positive fuse and a negative fuse, the heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, and the temperature sensor comprises a first temperature sensor and a second temperature sensor.

[0022] The first heat dissipation fan is located on one side of the positive fuse, and an air outlet of the first heat dissipation fan faces the positive fuse, and the first temperature sensor is located on the other side of the positive fuse.

[0023] The second heat dissipation fan is located on one side of the negative fuse, and an air outlet of the second heat dissipation fan faces the negative fuse, and the second temperature sensor is located on the other side of the negative fuse.

[0024] Optionally, the high-voltage box further comprises a mounting plate, a first fan support and a second fan support located in the heat-conducting box body.

[0025] The mounting plate is fixedly connected with an inner wall of the heat-conducting box body.

[0026] The first fan support is fixedly connected with the mounting plate, and the first fan is mounted on the first fan support.

[0027] The second fan support is fixedly connected with the mounting plate, and the second fan is mounted on the second fan support.

[0028] The technical scheme provided by the embodiment of the utility model has at least the following beneficial effects:

[0029] A high-voltage box is provided, comprising a heat-conducting box body, a switching power supply, a temperature control assembly, a heat dissipation fan assembly, a fuse and a power supply circuit located in the heat-conducting box body. The air outlet of the heat dissipation fan assembly faces the fuse, and the temperature control assembly can be arranged adjacent to the fuse. When the temperature of the fuse is detected to be greater than a first threshold temperature, the temperature control assembly can start the heat dissipation fan assembly to dissipate heat for the fuse, and when the temperature of the fuse is less than or equal to a second threshold temperature, the heat dissipation fan assembly is turned off. In this way, the heat dissipation speed of the fuse can be accelerated, so that the high-voltage box can be in a normal working state, the problem of poor heat dissipation effect of the high-voltage box in the related art can be solved, and the heat dissipation fan assembly can be prevented from being in a running state for a long time, the service life of the heat dissipation fan assembly is improved, and the energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is a connection structure schematic view of a high-voltage box shown in the embodiments of the utility model;

[0032] Figure 2 is a schematic view of the internal structure of a high-voltage box provided by the embodiments of the utility model;

[0033] Figure 3 is a schematic view of the structure of a temperature control assembly provided by the embodiments of the utility model;

[0034] Figure 4 is a schematic view of the internal structure of another high-voltage box provided by the embodiments of the utility model;

[0035] Figure 5 is a schematic view of the internal structure of a first fan support provided by the embodiments of the utility model;

[0036] Figure 6 is a connection structure schematic view of another high-voltage box provided by the embodiments of the utility model;

[0037] Figure 7 is another connection structure schematic diagram of a high-voltage box provided by the embodiment of the present application.

[0038] The specific embodiments of the present application have been shown in the above drawings, and will be described in more detail in the following. These drawings and the written description are not intended to limit the scope of the present application concept in any way, but to illustrate the present application concept to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0040] When the energy storage system is short-circuited, the energy storage battery pack and other elements in the energy storage system are greatly damaged. By setting a high-voltage box, the energy storage system can be protected from short circuit. With the development of the energy storage system, the operation stability requirement of the high-voltage box is also getting higher and higher. The high-voltage box usually includes a fuse, a control panel, a relay and other components. In the process of the energy storage system working, usually, the fuse in the high-voltage box will accumulate a large amount of heat in the long-term operation process, and the heat generated by other components in the high-voltage box is less. In the related technology, a heat dissipation vent is formed on the box body of the high-voltage box to make the air in the box and the air outside flow to naturally cool the fuse in the high-voltage box. However, the heat dissipation effect of this heat dissipation mode is poor, and because the box body has an opening, the overall protection level of the box body is low, the high-voltage box cannot adapt to harsh environments, and the applicability of the high-voltage box is low.

[0041] Please refer to Figure 1 and Figure 2 , Figure 1 is a connection structure schematic diagram of a high-voltage box 10 shown in the embodiment of the present application, Figure 2 is an internal structure schematic diagram of a high-voltage box 10 provided by the embodiment of the present application. The high-voltage box 10 can include a heat-conducting box body 11 and a switching power supply 12, a temperature control assembly 13, a heat dissipation fan assembly 14, a fuse 15 and a power supply circuit (not shown in the figure) located in the heat-conducting box body 11.

[0042] The heat-conducting box body 11 has the function of heat conduction, can make the air inside the heat-conducting box body 11 and the air outside the heat-conducting box body 11 exchange heat through the heat-conducting box body 11, and the parts of different temperatures on the heat-conducting box body 11 can also exchange heat without relative macroscopic displacement. The material of the heat-conducting box body 11 can include metal.

[0043] The switch power supply 12 can be electrically connected with the heat dissipation fan assembly 14 and the temperature control assembly 13 respectively, and can be electrically connected with the energy storage battery group in the energy storage system or the alternating current power supply 20. The heat dissipation fan assembly 14 and the temperature control assembly 13 can be electrically connected with the energy storage battery group or the alternating current power supply 20 through the switch power supply 12, so that the energy storage battery group or the alternating current power supply 20 can supply power to the heat dissipation fan assembly 14 and the temperature control assembly 13, thereby enabling the heat dissipation fan assembly 14 to convert electrical energy into kinetic energy.

[0044] The heat dissipation fan assembly 14 can be electrically connected with the temperature control assembly 13, and the temperature control assembly 13 can be used to control the opening or closing of the heat dissipation fan assembly 14. The air outlet of the heat dissipation fan assembly 14 is directed towards the fuse 15, and the temperature control assembly 13 can be arranged adjacent to the fuse 15. The heat dissipation fan assembly 14 can dissipate heat from the fuse 15 when converting electrical energy into kinetic energy, and the temperature control assembly 13 can measure the temperature of the fuse 15 in real time or at a preset time point to detect the temperature of the fuse 15.

[0045] The power supply circuit is electrically connected with the fuse 15, and can also be electrically connected with the energy storage battery group and the alternating current power supply 20. When it is detected that the current on the power supply circuit is greater than or equal to a preset threshold current, the fuse 15 can be fused to cut off the power supply circuit.

[0046] When the temperature of the fuse 15 is detected to be greater than or equal to a first threshold temperature, the temperature control assembly 13 outputs a first level to turn on the heat dissipation fan assembly 14, and when the temperature of the fuse 15 is detected to be less than or equal to a second threshold temperature, the temperature control assembly 13 outputs a second level to turn off the heat dissipation fan assembly 14, wherein the second threshold temperature is less than or equal to the first threshold temperature. The temperature control unit can compare the real-time temperature of the fuse 15 with the first threshold temperature according to the detected real-time temperature of the fuse 15. When the value of the real-time temperature is greater than the value of the first threshold temperature, it can be considered that the fuse 15 is in a high-temperature state. When the fuse 15 is in a high-temperature state, if the heat generated by the fuse 15 cannot be dissipated in time, the stability of the fuse 15 itself will be affected, and the performance of other components in the high-voltage box 10 will also be affected. At this time, the temperature control unit can output a first level to turn on the heat dissipation fan assembly 14, and the heat dissipation fan assembly 14 can blow the heat generated by the fuse 15 to the inner wall of the heat conduction box 11 and other positions in the heat conduction box 11 to accelerate the convection of air inside the heat conduction box 11. Since the heat conduction box 11 has a heat conduction function and a large heat dissipation surface, it can timely transmit heat to the external environment through the heat conduction box 11, thereby improving the overall heat dissipation effect of the high-voltage box 10 to avoid the problem that a large amount of heat generated by the fuse 15 during continuous use cannot be dissipated in time.

[0047] The heat dissipation fan assembly 14 can continuously reduce the temperature of the fuse 15 until the temperature control unit detects that the temperature of the fuse 15 is less than or equal to the second threshold temperature, and outputs a second level to turn off the heat dissipation fan assembly 14, which can avoid the heat dissipation fan assembly 14 being in a running state for a long time, can avoid the heat dissipation fan assembly 14 from overheating, can improve the service life of the heat dissipation fan assembly 14, and can reduce energy consumption.

[0048] The temperature of the fuse 15 is monitored in real time by the temperature control assembly 13, and the fuse 15 is cooled by the heat dissipation fan assembly 14 and the heat conduction box 11, which can keep the fuse 15 in a normal temperature state during operation, can improve the stability of the fuse 15, and further improves the reliability of the high-voltage box 10.

[0049] In addition, in the related art, the box body of the high-voltage box 10 has a ventilation hole, and impurities in the external environment such as dust, water vapor, and salt mist are more likely to enter the inside of the box body, corrode various components in the box body, cause operation safety hazards, and result in poor protection effect of the box body. In addition, when the external environment of the high-voltage box 10 is harsh, dust in the external environment is more likely to accumulate at the ventilation hole, causing the ventilation hole to be blocked, and further causing the heat dissipation effect of the high-voltage box 10 to decrease. In the embodiment of the present application, the heat conduction box 11 itself has a heat conduction function, and the heat conduction box 11 can not be provided with a ventilation hole. Compared with the box body with a ventilation hole in the related art, the heat conduction box 11 has a higher protection level, can ensure a clean working environment in the heat conduction box 11, and improves the reliability of the high-voltage box 10.

[0050] In summary, the embodiment of the present application provides a high-voltage box, which comprises a heat conduction box and a switching power supply, a temperature control assembly, a heat dissipation fan assembly, a fuse, and a power supply circuit located in the heat conduction box. The air outlet of the heat dissipation fan assembly faces the fuse, and the temperature control assembly can be arranged adjacent to the fuse. When the temperature of the fuse is detected to be greater than a first threshold temperature, the temperature control assembly can turn on the heat dissipation fan assembly to cool the fuse, and when the temperature of the fuse is less than or equal to a second threshold temperature, the temperature control assembly can turn off the heat dissipation fan assembly. In this way, the heat dissipation speed of the fuse can be accelerated, the high-voltage box can be kept in a normal working state, the problem of poor heat dissipation effect of the high-voltage box in the related art can be solved, the heat dissipation fan assembly can be kept in a running state for a long time, the service life of the heat dissipation fan assembly can be improved, and energy consumption can be reduced.

[0051] In an exemplary embodiment, the first temperature threshold value ranges from 20℃ to 40℃, and the second temperature threshold value ranges from 15℃ to 35℃. For example, the first threshold temperature can be 30 degrees, the second threshold temperature can be 25 degrees, the first threshold temperature can be 35 degrees, the second threshold temperature can be 32 degrees, or the first temperature threshold value and the second temperature threshold value can both be 30 degrees or both be 25 degrees. When the first temperature threshold value and the second temperature threshold value are the same, the vent temperature control assembly 13 outputs a first level to turn on the vent cooling fan assembly 14 when detecting that the temperature of the vent fuse 15 is greater than the first threshold temperature, and outputs a second level to turn off the vent cooling fan assembly 14 when detecting that the temperature of the vent fuse 15 is less than or equal to the first threshold temperature. Of course, the user can also set different threshold temperatures according to the temperature environment in which the high-voltage box 10 is located and the use requirements, and the embodiments of the present application do not limit this.

[0052] Please refer to Figure 3 , Figure 3 is a structure diagram of a temperature control assembly 13 provided by the embodiments of the present application. In an optional embodiment, the temperature control assembly 13 includes a temperature sensor 131 and a comparator 132, the temperature sensor 131 is electrically connected with the comparator 132, and the comparator 132 is electrically connected with the cooling fan assembly 14.

[0053] In the temperature control assembly 13, the temperature sensor 131 can include a positive temperature coefficient thermistor (English: Positive Temperature Coefficient thermistor; abbreviation: PTC thermistor) and a negative temperature coefficient thermistor (English: Negative Temperature Coefficient thermistor; abbreviation: NTC thermistor). The resistance value of the positive temperature coefficient thermistor increases with the increase of temperature, and the resistance value of the negative temperature coefficient thermistor decreases with the increase of temperature. Among them, the NTC thermistor has a faster response and higher precision, and can be used to collect and monitor the temperature around the fuse 15 in real time to provide protection for the fuse 15.

[0054] The temperature sensor 131 can further include a voltage dividing circuit and a microcontroller, the NTC thermistor is electrically connected to the microcontroller through the voltage dividing circuit, the voltage dividing circuit includes a voltage dividing fixed resistor, and the voltage dividing circuit can be used to convert the resistance value of the NTC thermistor into a voltage value. The resistance value of the NTC thermistor changes with temperature, when the NTC thermistor detects the temperature of the fuse 15, the resistance value of the NTC thermistor can be converted into a voltage value by the voltage dividing circuit and transmitted to the microcontroller, the microcontroller can include an analog-digital converter (ADC) and a microcontroller unit (MCU), the voltage analog quantity is collected by the ADC, and the voltage analog quantity is converted into a digital quantity by the MCU to obtain the real-time temperature value of the fuse 15.

[0055] The positive input end of the comparator 132 is electrically connected to the output end of the temperature sensor 131, and the negative input end is connected to a preset temperature threshold or reference voltage. When the temperature monitored by the temperature sensor 131 exceeds the temperature threshold, the sampling signal voltage will be higher than the reference voltage, and the comparator 132 can output a high-level signal, otherwise, when the temperature monitored by the temperature sensor 131 is lower than the temperature threshold, the sampling signal voltage will be lower than the reference voltage, and the comparator 132 can output a low-level signal.

[0056] The heat dissipation fan assembly 14 receives the output signal from the comparator 132, and adjusts the state of opening or closing according to the high or low level state of the signal.

[0057] Please refer to Figure 2 In an alternative embodiment, the temperature sensor 131 is located on one side of the fuse 15, the temperature sensor 131 can be arranged adjacent to the fuse 15, and the distance between the temperature sensor 131 and the fuse 15 is less than or equal to 60 mm. Within this range, the temperature sensor 131 can accurately perceive the temperature of the fuse 15.

[0058] In an alternative embodiment, the heat dissipation fan assembly 14 can include a heat dissipation fan 140 and a first switch (not shown in the figure), the heat dissipation fan 140 being electrically connected with the first switch, and the air outlet of the heat dissipation fan 140 facing the fuse 15; the first switch having a control end, an input end and an output end; the control end being electrically connected with the comparator 132 of the temperature control assembly 13, the input end being electrically connected with the switching power supply 12, and the output end being electrically connected with the heat dissipation fan 140; the first switch being turned on when receiving the first level, and being turned off when receiving the second level. The first switch can include a metal oxide semiconductor field effect transistor (MOSFET for short), which can be divided into two types of "N-type" and "P-type" according to the polarity of the metal oxide semiconductor field effect transistor, which can be referred to as NMOSFET and PMOSFET. The control end can be the gate of the first switch, and the input end and the output end can be the source and the drain of the first switch, respectively.

[0059] The air outlet of the heat dissipation fan 140 faces the fuse 15, which can timely spread the heat generated on the fuse 15 to the heat conduction box 11 and other spaces in the heat conduction box 11, so as to improve the heat dissipation efficiency.

[0060] Please refer to Figure 2 In an alternative embodiment, the heat dissipation fan 140 can be located on one side of the fuse 15, and the heat dissipation fan 140 can be arranged adjacent to the fuse 15, and the distance between the heat dissipation fan 140 and the fuse 15 ranges from 40 mm to 100 mm. Within this range, the heat dissipation fan 140 can directly blow air on the fuse 15 and accelerate the air convection of the inner wall of the heat conduction box 11, improve the heat conduction efficiency, and make the airflow provided by the heat dissipation fan 140 flow through multiple surfaces of the fuse 15 to improve the heat dissipation rate of the fuse 15. Moreover, the problem of spatial interference between the heat dissipation fan 140 and the fuse 15 can be avoided.

[0061] Please refer to Figure 4 , Figure 4is another internal structure schematic view of the high-voltage box 10 provided by the embodiment of the utility model, in an alternative embodiment, the fuse 15 can include positive fuse 151 and negative fuse 152, the temperature sensor 131 includes first temperature sensor 1311 and second temperature sensor 1312, and the heat dissipation fan 140 includes first heat dissipation fan 141 and second heat dissipation fan 142;First heat dissipation fan 141 is located at one side of positive fuse 151, and the air outlet of first heat dissipation fan 141 is towards positive fuse 151, and first temperature sensor 1311 is located at the other side of positive fuse 151;Second heat dissipation fan is located at one side of negative fuse 152, and the air outlet of second heat dissipation fan 142 is towards negative fuse 152, and second temperature sensor 1312 is located at the other side of negative fuse 152.

[0062] The two fuses 15 in the high-voltage box 10 can be cooled respectively, so that the speed of air flow in the box is further accelerated, so that the heat generated by the two fuses 15 can be dissipated in time through the heat-conducting box body 11, and heat accumulation is avoided.

[0063] The comparator 132 can also include first comparator 132 and second comparator 132, and the first comparator 132 is electrically connected with the first temperature sensor 1311 and the first heat dissipation fan 141 respectively, and the second comparator 132 is electrically connected with the second temperature sensor 1312 and the second heat dissipation fan 142 respectively.

[0064] Please refer to Figure 4 and Figure 5 , Figure 5 is an internal structure schematic view of the first fan bracket 161 provided by the embodiment of the utility model, and it should be noted that Figure 5 is a three-view of the first fan bracket 161, to more clearly show the structure of the first fan bracket 161, in an alternative embodiment, the high-voltage box 10 can also include a mounting plate 17, a first fan bracket 161 and a second fan bracket 162 located in the heat-conducting box body 11;The structure of the first fan bracket 161 and the second fan bracket 162 can be the same.

[0065] The mounting plate 17 can be fixedly connected with the inner wall of the heat-conducting box body 11;The first fan bracket 161 is fixedly connected with the mounting plate 17, and the first fan is installed on the first fan bracket 161;The second fan bracket 162 is fixedly connected with the mounting plate 17, and the second fan is installed on the second fan bracket 162.

[0066] The mounting plate 17 can be welded or bonded with the inner wall of the heat conduction box 11, the first fan bracket 161 and the mounting plate 17 can be bolted, the second fan bracket 162 and the mounting plate 17 can also be bolted, by mounting the first fan bracket 161 and the second fan bracket 162 on the mounting plate 17, the box wall of the heat conduction box 11 can be prevented from being damaged when the first fan bracket 161 and the second fan bracket 162 are installed, the integrity of the heat conduction box 11 is good, and the protection performance of the heat conduction box 11 is improved.

[0067] In an exemplary embodiment, the temperature sensor 131 can adopt a wire ear type thermistor and can be fixed on the mounting plate 17 by bolts. The temperature sensor 131 can be located on one side of the fuse 15 close to the mounting plate 17 to save installation space and avoid space interference, or the temperature sensor 131 can be located on one side of the fuse 15 in a first direction, which can be a direction parallel to the plate surface of the mounting plate 17, so that the temperature sensor 131 can be conveniently replaced or maintained.

[0068] The first fan bracket 161 can include a connected base portion 1611 and a support portion 1612, the base portion 1611 can be bolted with the mounting plate 17, the heat dissipation fan 140 can be bolted with the support portion 1612, and the support portion 1612 has a ventilation opening matched with an air inlet or an air outlet of the heat dissipation fan 140.

[0069] Please refer to Figure 6 , Figure 6 is another connection structure schematic view of the high-voltage box 10 provided by the embodiment of the utility model, in an alternative embodiment, the switching power supply 12 includes an alternating current direct current converter (AC / DC) 121, the input end of the alternating current direct current converter 121 is electrically connected with the alternating current power supply 20, and the output end of the alternating current direct current converter 121 is electrically connected with the heat dissipation fan assembly 14 and the temperature control assembly 13. The alternating current direct current converter 121 is a device for converting alternating current into direct current, and the power flow direction can be bidirectional. For example, the alternating current direct current converter 121 can convert the voltage output by the alternating current power supply 20 into 24V direct current voltage, and the high-voltage box 10 can further include a circuit board 19 located in the heat conduction box 11, the first switch and the temperature control assembly 13 can be integrated on the circuit board 19, and the heat dissipation fan 140 can include a 24V direct current fan, so as to facilitate the alternating current direct current converter 121 to supply power to the circuit board 19 and the heat dissipation fan 140.

[0070] Please refer to Figure 7 , Figure 7is another connection structure schematic view of the high-voltage box 10 provided by the embodiment of the utility model, in an alternative embodiment, the high-voltage box 10 can also include alarm unit 18, alarm unit 18 is electrically connected with temperature control assembly 13, and is used for sending alarm according to the output level of temperature control assembly 13.The input end of alarm unit 18 can be connected with the output end of comparator 132 in temperature control unit.

[0071] When detecting that the temperature of fuse 15 is greater than the first threshold temperature, temperature control assembly 13 outputs the first level to turn on alarm unit 18, and when detecting that the temperature of fuse 15 is less than or equal to the second threshold temperature, temperature control assembly 13 outputs the second level to turn off alarm unit 18, and the second threshold temperature is less than or equal to the first temperature threshold value.Alarm unit 18 can send alarm after being turned on.

[0072] Alternatively, when the temperature of fuse 15 is still greater than the first threshold temperature after turning on the heat dissipation fan assembly 14 for a period of time, the alarm unit 18 is turned on.

[0073] In an alternative embodiment, alarm unit 18 can include at least one of a sound alarm component, an optoelectronic alarm component and a remote alarm component; the sound alarm component and the optoelectronic alarm component are located outside the box body; and the remote alarm component is located in a monitoring room.

[0074] For example, the sound alarm component can include a buzzer. The optoelectronic alarm component can include an LED lamp. The remote alarm component can include a display, and the monitoring room can be a monitoring room where a staff member managing the energy storage system is located. When the display shows alarm information, the staff member can timely understand the on-site situation to make corresponding emergency handling mode.

[0075] In summary, the utility model embodiment provides a kind of high-voltage box, including heat conduction box body and switch power supply, temperature control assembly, heat dissipation fan assembly, fuse and power supply circuit in heat conduction box body. Wherein, the air outlet of heat dissipation fan assembly is directed to fuse, temperature control assembly can be adjacent to the setting of fuse, when detecting that the temperature of fuse is greater than the first threshold temperature, temperature control assembly can open heat dissipation fan assembly to heat dissipation to fuse, and when the temperature of fuse is less than or equal to the second threshold temperature, heat dissipation fan assembly is closed;Therefore, it can accelerate the heat dissipation speed of fuse, so that high-voltage box can be in normal working state, can solve the problem of poor heat dissipation effect of high-voltage box in relevant technology, and also, heat dissipation fan assembly can be avoided long time in running state, improve the service life of heat dissipation fan assembly, reduce energy consumption.

[0076] In the utility model, the terms "first", "second", "third" and "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0077] In several embodiments provided by the utility model, it should be understood that the disclosed device can be realized by other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and another division mode can be used in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0078] The above description is only optional embodiments of the utility model, and does not limit the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-voltage box, characterized in that: The high-voltage box includes a heat-conducting box body and a switching power supply, a temperature control component, a cooling fan component, a fuse and a power supply circuit located in the heat-conducting box body; The switching power supply is electrically connected to the cooling fan assembly and the temperature control assembly respectively; The heat dissipation fan assembly is electrically connected to the temperature control assembly, the air outlet of the heat dissipation fan assembly faces the fuse, and the temperature control assembly is arranged adjacent to the fuse; The power supply circuit is electrically connected to the fuse; When the temperature control component detects that the temperature of the fuse is greater than the first threshold temperature, the temperature control component outputs a first level to turn on the cooling fan component; when the temperature of the fuse is detected to be less than or equal to the second threshold temperature, the temperature control component outputs a second level to turn off the cooling fan component, and the second threshold temperature is less than or equal to the first temperature threshold.

2. The high-voltage box according to claim 1, characterized in that: The temperature control component includes a temperature sensor and a comparator. The temperature sensor is electrically connected to the comparator, and the comparator is electrically connected to the heat dissipation fan component.

3. The high-voltage box according to claim 2, characterized in that: The temperature sensor is arranged adjacent to the fuse, and the distance between the temperature sensor and the fuse is less than or equal to 60 mm.

4. The high-voltage box according to claim 2, characterized in that: The heat dissipation fan assembly includes a heat dissipation fan and a first switch, and the heat dissipation fan is electrically connected to the first switch; The first switch has a control end, an input end, and an output end; The control end is electrically connected to the comparator, the input end is electrically connected to the switching power supply, and the output end is electrically connected to the heat dissipation fan.

5. The high-voltage box according to claim 4, characterized in that: The heat dissipation fan is arranged adjacent to the fuse, and the distance between the heat dissipation fan and the fuse is in the range of 40 mm to 100 mm.

6. The high-voltage box according to claim 1, characterized in that: The switching power supply includes an AC-DC converter, an input end of the AC-DC converter is electrically connected to an AC power supply, and an output end of the AC-DC converter is electrically connected to the cooling fan assembly and the temperature control assembly.

7. The high-voltage box according to claim 1, characterized in that: The high-voltage box further includes an alarm unit, which is electrically connected to the temperature control component and is configured to issue an alarm according to the output level of the temperature control component.

8. The high-voltage box according to claim 7, characterized in that: The alarm unit includes at least one of a sound alarm component, a photoelectric alarm component and a remote alarm component; The sound alarm component and the photoelectric alarm component are located outside the box; The remote alarm component is located in the monitoring room.

9. The high-voltage box according to claim 4, characterized in that: The fuse includes a positive fuse and a negative fuse, the heat dissipation fan includes a first heat dissipation fan and a second heat dissipation fan, and the temperature sensor includes a first temperature sensor and a second temperature sensor; The first cooling fan is located on one side of the positive fuse, and the air outlet of the first cooling fan faces the positive fuse, and the first temperature sensor is located on the other side of the positive fuse; The second heat dissipation fan is located on one side of the negative pole fuse, and an air outlet of the second heat dissipation fan faces the negative pole fuse. The second temperature sensor is located on the other side of the negative pole fuse.

10. The high-voltage box according to claim 1, characterized in that: The high-voltage box also includes a mounting plate, a first fan bracket and a second fan bracket located within the heat-conducting box body; The mounting plate is fixedly connected to the inner wall of the heat conducting box; The first fan bracket is fixedly connected to the mounting plate, and the first fan is mounted on the first fan bracket; The second fan bracket is fixedly connected to the mounting plate, and the second fan is mounted on the second fan bracket.

Images