Cold chain cabinet power supply system and device

Abstract

The utility model discloses a cold chain cabinet power supply system and device, and the system comprises a charging interface which is used for the access of commercial power; the discharge interface is used for being connected with a power supply port of the cold chain cabinet; an energy storage device; the first end of the voltage conversion device is connected with the charging interface, the second end is connected with the discharging interface, and the third end is connected with the energy storage device; the voltage conversion device is used for rectifying the mains supply, outputting the rectified mains supply to the energy storage device and outputting the mains supply to the discharge interface; the control device is respectively connected with the voltage conversion device and the energy storage device; the control device obtains the output voltage and temperature of the energy storage device and outputs the output voltage and temperature to the voltage conversion device so that the voltage conversion device can adjust the working state. According to the utility model, the energy flow of the voltage conversion device is controlled by detecting the access states of the charging interface and the discharging interface so as to continuously supply power to the cold chain cabinet; and the output voltage and temperature of the energy storage device are obtained, so that overvoltage or overheating of the energy storage device is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cold chain cabinet power supply, and in particular to a cold chain cabinet power supply system and device. Background Art

[0002] The cold chain cabinet power supply system is a system that provides electrical energy to the containers of the cold chain cabinet during transportation.

[0003] The traditional cold chain cabinet power supply system includes batteries and universal interfaces, which are used for time-sharing multiplexing to charge the batteries or power the cold chain cabinets. This is not conducive to long-term continuous power supply to the cold chain cabinets. Moreover, the traditional cold chain cabinet power supply system generates severe heat after long-term operation and is prone to failure due to overheating. Utility Model Content

[0004] The utility model proposes a cold chain cabinet power supply system, the cold chain cabinet power supply system comprising:

[0005] Charging interface, used to connect to the mains;

[0006] Discharge interface, used to connect to the cold chain cabinet;

[0007] Energy storage devices;

[0008] A voltage conversion device, a first end of which is connected to the charging interface, a second end of which is connected to the discharging interface, and a third end of which is connected to the energy storage device; the voltage conversion device is used to output the mains power to the energy storage device after rectification and to output the mains power to the discharging interface; or the voltage conversion device is used to invert the voltage output by the energy storage device and output it to the discharging interface;

[0009] A control device is connected to the voltage conversion device and the energy storage device respectively; the control device is used to obtain the output voltage and temperature of the energy storage device, and output them to the voltage conversion device so that the voltage conversion device adjusts the working state according to the output voltage and temperature of the energy storage device.

[0010] Optionally, the energy storage device includes: a battery.

[0011] Optionally, the energy storage device further includes:

[0012] A battery management module, a first end of which is electrically connected to the battery, and a second end of which is connected to the control device; the battery management module is used to detect the output voltage and cell temperature of the battery cell and output them to the control device;

[0013] A circuit breaker, wherein the moving contact of the circuit breaker is connected to the third end of the voltage conversion device, and the static contact is connected to the battery; the coil of the circuit breaker is connected to the battery management module;

[0014] The battery management module is also used to control the circuit breaker to cut off the electrical circuit between the voltage conversion device and the battery when it is detected that the temperature of the battery cell exceeds a predetermined temperature.

[0015] Optionally, the control device comprises:

[0016] A main control box, the main control box is connected to the voltage conversion device and the energy storage device respectively; the control device is used to obtain the output voltage and temperature of the energy storage device, and output them to the voltage conversion device so that the voltage conversion device adjusts the working state according to the output voltage and temperature of the energy storage device;

[0017] a first relay, wherein a static contact of the first relay is connected to the positive port of the third end of the voltage conversion device, and a moving contact is connected to the energy storage device; and a coil of the first relay is connected to the main control box;

[0018] A second relay, wherein the static contact of the second relay is connected to the negative port of the third end of the voltage conversion device, and the moving contact is connected to the energy storage device; and the coil of the second relay is connected to the main control box.

[0019] Optionally, the voltage conversion device includes:

[0020] A switch assembly, wherein a first end of the switch assembly is connected to the charging interface, and a second end of the switch assembly is connected to the discharging interface;

[0021] A control unit, the control unit being connected to the control end of the switch assembly; the control unit being used to control the switch assembly to conduct the passage between the charging interface and the discharge interface when the discharge interface is connected to the cold chain cabinet and the charging interface is connected to the mains, so that the mains connected to the charging interface supplies power to the cold chain cabinet;

[0022] An energy storage bidirectional converter, wherein a first end of the energy storage bidirectional converter is connected to the charging interface, a second end of the energy storage bidirectional converter is connected to the discharging interface, and a third end of the energy storage device is connected.

[0023] The utility model also provides a cold chain cabinet power supply device, which includes a chassis and the cold chain cabinet power supply system.

[0024] Optionally, the cold chain cabinet power supply device includes:

[0025] A battery pack, the battery pack comprising a plurality of the batteries;

[0026] An aerosol fire extinguishing system, wherein the aerosol fire extinguishing system is arranged on the upper surface of the battery pack; the aerosol fire extinguishing system is used to release aerosol to the battery pack when it is detected that the temperature of the battery pack is greater than a first set temperature value.

[0027] Optionally, the cold chain cabinet power supply device further includes:

[0028] Cooling fan;

[0029] A mounting hole is formed on the surface of the chassis shell, and the heat dissipation fan is arranged in the mounting hole.

[0030] Optionally, the cold chain cabinet power supply device further includes:

[0031] A rain cover is arranged on the surface of the chassis and covers the opening of the mounting hole.

[0032] The utility model discloses a power supply system and device for a cold chain cabinet, wherein the power supply system for the cold chain cabinet comprises: a charging interface for accessing the mains; a discharging interface for connecting to the power supply port of the cold chain cabinet; an energy storage device; a voltage conversion device, wherein a first end is connected to the charging interface, a second end is connected to the discharging interface, and a third end is connected to the energy storage device; the voltage conversion device is used to output the mains power to the energy storage device after rectification and output the mains power to the discharging interface; or the voltage conversion device is used to invert the voltage output by the energy storage device and output it to the discharging interface; a control device is respectively connected to the voltage conversion device and the energy storage device; the control device is used to obtain the output voltage and temperature of the energy storage device, and output them to the voltage conversion device so that the voltage conversion device adjusts the working state according to the output voltage and temperature of the energy storage device. The utility model detects whether the charging interface and the discharging interface are respectively connected to the mains power and the power supply port of the cold chain cabinet through a voltage conversion device, thereby rectifying the mains power or inverting the voltage output by the energy storage device to achieve long-term continuous power supply to the cold chain cabinet; the utility model also obtains the output voltage and temperature of the energy storage device through a control device to avoid overvoltage or overheating of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1This is a structural schematic diagram of an embodiment of a power supply system for a cold chain cabinet of the utility model;

[0035] Figure 2 This is a structural schematic diagram of another embodiment of the cold chain cabinet power supply system of the utility model;

[0036] Figure 3 This is a structural schematic diagram of another embodiment of the cold chain cabinet power supply system of the utility model;

[0037] Figure 4 This is a structural schematic diagram of another embodiment of the cold chain cabinet power supply system of the utility model;

[0038] Figure 5 This is a structural schematic diagram of an embodiment of a power supply device for a cold chain cabinet of the utility model;

[0039] Figure 6 This is a schematic structural diagram of another embodiment of the cold chain cabinet power supply device of the utility model.

[0040] Description of Figure Numbers:

[0041]

[0042] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0047] Reference Figure 1 The utility model provides a cold chain cabinet power supply system 10, and the cold chain cabinet power supply system 10 includes:

[0048] Charging interface 110, used to connect to the mains;

[0049] Discharge interface 120, used to connect to the cold chain cabinet;

[0050] Energy storage device 130;

[0051] A voltage conversion device 140, a first end of which is connected to the charging interface 110, a second end of which is connected to the discharging interface 120, and a third end of which is connected to the energy storage device 130; the voltage conversion device 140 is used to rectify the mains power and output it to the energy storage device 130 and output the mains power to the discharging interface 120; or the voltage conversion device 140 is used to invert the voltage output by the energy storage device 130 and output it to the discharging interface 120;

[0052] The control device 150 is connected to the voltage conversion device 140 and the energy storage device 130 respectively; the control device 150 is used to obtain the output voltage and temperature of the energy storage device 130, and output them to the voltage conversion device 140 so that the voltage conversion device 140 adjusts the working state according to the output voltage and temperature of the energy storage device 130.

[0053] It should be noted that the charging interface 110 is used to access the mains power. The specific interface structure of the interface is determined by the R&D personnel based on the output interface structure of the mains power output device, and is not limited here. It is easy to understand that the charging interface 110 includes a live wire and a neutral wire. The discharge interface 120 is used to access the cold chain cabinet. The specific interface structure of the interface is determined by the R&D personnel based on the structure of the relevant interface of the cold chain cabinet, and is not limited here. The energy storage device 130 is a device for storing electrical energy in the cold chain cabinet power supply system 10. The energy storage device 130 may include a battery, a supercapacitor or a flywheel energy storage device, etc.; wherein the battery may be a lithium iron phosphate battery.

[0054] The voltage conversion device 140 can be used to rectify the mains power into direct current and then charge the energy storage device 130, and can also be used to invert the DC voltage output by the energy storage device 130 into an alternating voltage and then output it to the discharge interface 120 to power the cold chain cabinet. In addition, the voltage conversion device 140 can also provide the function of the cold chain cabinet while charging the energy storage device 130; in one embodiment of the utility model, when the voltage conversion device 140 detects that the charging interface 110 is connected to the mains power and the discharge interface 120 is connected to the power supply control of the cold chain cabinet, the voltage conversion device 140 electrically connects the first end and the second end of the voltage conversion device 140 by changing the internal mechanical structure, so that the voltage conversion device 140 can output the mains power to the discharge interface 120 to power the cold chain cabinet while charging the energy storage device 130. The mechanical structure may include gears, a reducer and a connecting rod; the mechanical structure connects the circuit between the first end and the second end of the voltage conversion device 140 under the drive of the motor. In one embodiment of the utility model, there is a switch between the first end and the second end of the voltage conversion device 140; when the voltage conversion device 140 detects that the charging interface 110 is connected to the mains and the discharge interface 120 is connected to the power supply control of the cold chain cabinet, the voltage conversion device 140 controls the switch to conduct the passage between the first end and the second end of the voltage conversion device 140, so that the discharge interface 120 outputs the mains to the cold chain cabinet. In this way, the cold chain cabinet can use the mains to power the cold chain cabinet and charge the energy storage device 130 when connected to the mains, so as to achieve long-term continuous power supply to the cold chain cabinet. When there is a mains connection, the mains is used to power the cold chain cabinet and supplement the electric energy of the energy storage device 130; when there is no mains connection, the voltage conversion device 140 inverts the DC voltage output by the energy storage device 130 and outputs it to the discharge interface 120 to power the cold chain cabinet.

[0055] The control device 150 is connected to the voltage conversion device 140 and the energy storage device 130 respectively. It should be understood that the energy storage device 130 will generate heat when charging or discharging, and the energy storage device in the energy storage device 130 may spontaneously combust or explode at high temperatures, causing economic losses. In order to avoid this situation, the control device 150 obtains the output voltage and temperature of the energy storage device 130 and outputs it to the voltage conversion device 140. The voltage conversion device 140 can determine whether it is necessary to stop charging by comparing the output voltage of the energy storage device 130 with the rated voltage of the energy storage device 130; when the output voltage of the energy storage device 130 is equal to or greater than the rated voltage of the energy storage device 130, the voltage conversion device 140 stops rectifying the city power and outputting it to the energy storage device 130. In addition, the voltage conversion device 140 can determine whether to stop charging or discharging by comparing the temperature of the energy storage device 130 with the predetermined temperature of the energy storage device 130; when the temperature of the energy storage device 130 is equal to or greater than the predetermined temperature of the energy storage device 130, the voltage conversion device 140 stops rectifying the AC power and outputting it to the energy storage device 130 or stops inverting the output voltage of the energy storage device 130 and outputting it to the discharge interface 120.

[0056] The control device 150 may include an MCU, a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), a PLC, a SOC (System On Chip), etc. The control device 150 may obtain the output voltage and temperature of the energy storage device 130 by acquiring the information of the BMS in the energy storage device 130. The control device 150 may also obtain the output voltage and temperature of the energy storage device 130 through a voltage detection device and a temperature sensor.

[0057] The utility model discloses a cold chain cabinet power supply system 10, which includes: a charging interface 110 for connecting to the mains; a discharge interface 120 for connecting to the power supply port of the cold chain cabinet; an energy storage device 130;

[0058] A voltage conversion device 140, a first end of which is connected to the charging interface 110, a second end of which is connected to the discharging interface 120, and a third end of which is connected to the energy storage device 130; the voltage conversion device 140 is used to rectify the mains power and output it to the energy storage device 130, and to output the mains power to the discharging interface 120; or the voltage conversion device 140 is used to invert the voltage output by the energy storage device 130 and output it to the discharging interface 120; a control device 150, which is respectively connected to the voltage conversion device 140 and the energy storage device 130; the control device 150 is used to obtain the output voltage and temperature of the energy storage device 130, and output them to the voltage conversion device 140 so that the voltage conversion device 140 adjusts the working state according to the output voltage and temperature of the energy storage device 130. The utility model detects whether the charging interface 110 and the discharging interface 120 are respectively connected to the AC power supply and the power supply port of the cold chain cabinet through the voltage conversion device 140, thereby rectifying the AC power supply or inverting the voltage output by the energy storage device 130 to achieve long-term continuous power supply for the cold chain cabinet; the utility model also obtains the output voltage and temperature of the energy storage device 130 through the control device 150 to avoid overvoltage or overheating of the energy storage device 130.

[0059] In one embodiment of the present invention, the energy storage device 130 includes a battery. The battery may be a lithium iron phosphate battery. The lithium iron phosphate battery has the characteristics of long service life, good high temperature performance, high energy density and no memory effect.

[0060] Reference Figure 2 In one embodiment of the present utility model, the energy storage device 130 further includes:

[0061] A battery management module 1310, a first end of which is electrically connected to the battery, and a second end of which is connected to the control device 150; the battery management module 1310 is used to detect the output voltage and cell temperature of the battery cell, and output them to the control device 150;

[0062] A circuit breaker 1320, wherein a moving contact of the circuit breaker 1320 is connected to the third end of the voltage conversion device 140, and a stationary contact of the circuit breaker 1320 is connected to the battery; and a coil of the circuit breaker 1320 is connected to the battery management module 1310;

[0063] The battery management module 1310 is further configured to control the circuit breaker 1320 to cut off the electrical circuit between the voltage conversion device 140 and the battery when it is detected that the temperature of the battery cell exceeds a predetermined temperature.

[0064] In this embodiment, in order to improve the safety of battery use and reduce the power consumption of the cold chain cabinet power supply system 10 in the storage state. The battery management module 1310 detects the output voltage and cell temperature of the battery cell, and outputs them to the control device 150 for the control device 150 to process the output voltage and cell temperature of the cell; in addition, the battery management module 1310 also judges the temperature of the cell, and when the temperature of the battery cell exceeds the predetermined temperature, the circuit breaker 1320 located in the electrical circuit between the battery and the voltage conversion device 140 is promptly cut off to prevent the temperature of the cell from further rising, and accidents such as spontaneous combustion or explosion occur. The battery management module 1310 may include a BMS, a voltage detection circuit, and a temperature sensor, etc. The circuit breaker 1320 may include an air switch and a vacuum circuit breaker 1320, etc. In another embodiment of the utility model, the static contact of the circuit breaker 1320 is connected to the third end of the voltage conversion device 140, and the moving contact is connected to the battery; the coil of the circuit breaker 1320 is connected to the battery management module 1310; when the battery management module 1310 does not control the circuit breaker 1320 to operate, the moving contact and the static contact of the circuit breaker 1320 are closed. In addition, the battery management module 1310 can also disconnect the circuit breaker 1320 when the cold chain cabinet power supply system 10 is in storage state to reduce the output power consumption of the battery cell. The energy storage device 130 may further include a toggle switch, which is connected to the battery management module 1310; the toggle switch may be toggled to output a switch signal to the battery management module 1310, and after receiving the switch signal, the battery management module 1310 outputs current to the coil of the circuit breaker 1320, so that the moving contact of the circuit breaker 1320 is actuated to disconnect the electrical circuit between the battery and the voltage conversion device 140. The predetermined temperature may be determined by researchers through experiments.

[0065] Reference Figure 3 In one embodiment of the present utility model, the control device 150 includes:

[0066] A main control box 1510, the main control box 1510 is connected to the voltage conversion device 140 and the energy storage device 130 respectively; the control device 150 is used to obtain the output voltage and temperature of the energy storage device 130, and output them to the voltage conversion device 140 so that the voltage conversion device 140 adjusts the working state according to the output voltage and temperature of the energy storage device 130;

[0067] A first relay FR1, wherein a static contact of the first relay FR1 is connected to the positive port of the third end of the voltage conversion device 140, and a moving contact is connected to the energy storage device 130; and a coil of the first relay FR1 is connected to the main control box 1510;

[0068] The second relay FR2, the static contact of the second relay FR2 is connected to the negative port of the third end of the voltage conversion device 140, and the moving contact is connected to the energy storage device 130; the coil of the second relay FR2 is connected to the main control box 1510.

[0069] In this embodiment, in order to increase the safety of battery use and avoid accidents in time, the main control box 1510 is connected to the voltage conversion device 140 and the energy storage device 130 respectively, and is used to obtain the output voltage and battery cell temperature of the energy storage device 130. The main control box 1510 obtains the output voltage and battery cell temperature of the energy storage device 130 by detecting the output voltage and battery cell temperature of the battery through a voltage detection circuit and a temperature sensor respectively; in addition, in another embodiment of the utility model, the main control box 1510 may be a battery management module 1310 in the energy storage device 130 to exchange data to obtain the output voltage and temperature of the energy storage device 130. The main control box 1510 can control the first relay FR1 and the second relay FR2 according to the temperature of the energy storage device 130 to connect or disconnect the electrical circuit of the voltage conversion device 140 and the energy storage device 130. In order to improve the safety of the cold chain cabinet power supply system 10, when the temperature of the energy storage device 130 exceeds the predetermined temperature, the main control box 1510 controls the first relay FR1 and the second relay FR2 to disconnect the electrical circuit of the voltage conversion device 140 and the energy storage device 130. The first relay FR1 and the second relay FR2 can be dynamic open relays. The main control box 1510 also outputs the output voltage and temperature of the energy storage device 130 to the voltage conversion device 140. The voltage conversion device 140 can determine whether to rectify the mains power and output it to the energy storage device 130 according to the output voltage to charge the energy storage device 130; the voltage conversion device 140 can also determine whether to stop working according to the temperature of the energy storage device 130; when the temperature of the energy storage device 130 exceeds the predetermined temperature, the voltage conversion device 140 stops rectifying the mains power and outputting it to the energy storage device 130, and stops inverting the output voltage of the energy storage device 130 and outputting it to the output interface. The main control box 1510 may include a power module, a voltage detection circuit, a temperature sensor and a controller. The controller may be an MCU, an FPGA or a SOC, etc.

[0070] Reference Figure 4 In one embodiment of the present utility model, the voltage conversion device 140 includes:

[0071] A switch component 1410, wherein a first end of the switch component 1410 is connected to the charging interface 110, and a second end of the switch component 1410 is connected to the discharging interface 120;

[0072] A control unit 1420, wherein the control unit 1420 is connected to the control end of the switch component 1410; the control unit 1420 is used to control the switch component 1410 to conduct the passage between the charging interface 110 and the discharge interface 120 when the discharge interface 120 is connected to the cold chain cabinet and the charging interface 110 is connected to the mains, so that the mains connected to the charging interface 110 supplies power to the cold chain cabinet;

[0073] An energy storage bidirectional converter 1430 , wherein a first end of the energy storage bidirectional converter 1430 is connected to the charging interface 110 , a second end of the energy storage bidirectional converter 1430 is connected to the discharging interface 120 , and a third end of the energy storage device 130 .

[0074] In this embodiment, it is considered that this scheme proposes a scheme of outputting the AC power to the discharge interface 120 while outputting the AC power to the energy storage device 130 after rectification, so as to power the cold chain cabinet while charging the energy storage device 130, thereby being able to continuously power the cold chain cabinet for a long time; because, when there is AC power input, the AC power supplies the cold chain cabinet and charges the energy storage device 130 to supplement the electric energy lost by the energy storage device 130 for supplying power to the cold chain cabinet when there is no AC power input.

[0075] The charging interface 110 is used to access the mains, and the discharging interface 120 is connected to the power supply port of the cold chain cabinet. The first end of the switch assembly 1410 is connected to the charging interface 110, and the second end is connected to the discharging interface 120. The energy storage bidirectional converter 1430 can not only rectify AC power into DC power, but also invert DC power into AC power. The first end of the energy storage bidirectional converter 1430 is connected to the charging interface 110, the second end is connected to the discharging interface 120, and the third end is connected to the energy storage device 130. The control unit 1420 is connected to the control end of the switch component 1410. When the control unit 1420 detects that the discharge interface 120 is connected to the cold chain cabinet and the charging interface 110 is connected to the mains, the control unit 1420 controls the switch component 1410 to conduct the passage between the charging interface 110 and the discharge interface 120; when the control unit 1420 does not detect that the discharge interface 120 is connected to the cold chain cabinet and the charging interface 110 is connected to the mains, the control unit 1420 controls the switch component 1410 to disconnect the passage between the charging interface 110 and the discharge interface 120. The switch component 1410 may include a switch tube, a relay, a knife switch, etc. The control unit 1420 may include an MCU, a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), a PLC, a SOC (System On Chip), etc.

[0076] The utility model also proposes a cold chain cabinet power supply device, which includes a chassis 20 and the cold chain cabinet power supply system 10. The specific structure of the cold chain cabinet power supply system 10 refers to the above embodiment. Since the cold chain cabinet power supply device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0077] Reference Figure 5 and Figure 6 In one embodiment of the utility model, the cold chain cabinet power supply device includes:

[0078] A battery pack 30, wherein the battery pack 30 comprises a plurality of the batteries described above;

[0079] The aerosol fire extinguishing system 40 is disposed on the upper surface of the battery pack 30 ; the aerosol fire extinguishing system 40 is used to release aerosol toward the battery pack 30 when it is detected that the temperature of the battery pack 30 is greater than a first set temperature value.

[0080] In this embodiment, the battery pack 30 includes a plurality of batteries in the energy storage device 130; the aerosol fire extinguishing system 40 may include a temperature sensor, which is in contact with the battery pack 30 and is used to detect the temperature of the battery pack 30; when the temperature of the battery pack 30 exceeds a first set temperature value, the aerosol fire extinguishing system 40 releases aerosol to the battery pack 30 to reduce the temperature of the battery pack 30 or extinguish the fire. The first set temperature value is determined by the R&D personnel, and it should be noted that the value of the first set temperature is greater than the value of the predetermined temperature. It is easy to understand that the first set temperature can be a value in the temperature range when a fire occurs in the battery pack 30. In another embodiment of the utility model, the aerosol fire extinguishing system 40 can be connected to the battery management module 1310, receive the battery cell temperature signal output from the battery management module 1310, and release aerosol according to the signal.

[0081] Reference Figure 5 and Figure 6 In one embodiment of the utility model, the cold chain cabinet power supply device further includes:

[0082] Cooling fan 50;

[0083] The housing surface of the chassis 20 is formed with a mounting hole, and the heat dissipation fan 50 is disposed in the mounting hole.

[0084] In this embodiment, in order to reduce the temperature of the battery pack 30 during operation, the cold chain cabinet power supply device further includes a cooling fan 50, which is disposed in a mounting hole formed in the housing of the chassis 20. Preferably, the cooling fan 50 can be disposed on a side surface of the housing of the chassis 20 that is closest to the battery pack 30.

[0085] In one embodiment of the utility model, the cold chain cabinet power supply device further includes:

[0086] A rain cover 60 is disposed on the surface of the chassis 20 and covers the opening of the mounting hole.

[0087] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cold chain cabinet power supply system, characterized in that: The cold chain cabinet power supply system includes: Charging interface, used to connect to the mains; Discharge interface, used to connect to the power supply port of the cold chain cabinet; Energy storage devices; A voltage conversion device, a first end of which is connected to the charging interface, a second end of which is connected to the discharging interface, and a third end of which is connected to the energy storage device; the voltage conversion device is used to output the mains power to the energy storage device after rectification and to output the mains power to the discharging interface; or the voltage conversion device is used to invert the voltage output by the energy storage device and output it to the discharging interface; A control device is connected to the voltage conversion device and the energy storage device respectively; the control device is used to obtain the output voltage and temperature of the energy storage device, and output them to the voltage conversion device so that the voltage conversion device adjusts the working state according to the output voltage and temperature of the energy storage device.

2. The cold chain cabinet power supply system according to claim 1, characterized in that: The energy storage device includes: a battery.

3. The cold chain cabinet power supply system according to claim 2, characterized in that: The energy storage device also includes: A battery management module, a first end of which is electrically connected to the battery, and a second end of which is connected to the control device; the battery management module is used to detect the output voltage and cell temperature of the battery cell and output them to the control device; A circuit breaker, wherein the moving contact of the circuit breaker is connected to the third end of the voltage conversion device, and the static contact is connected to the battery; the coil of the circuit breaker is connected to the battery management module; The battery management module is also used to control the circuit breaker to cut off the electrical circuit between the voltage conversion device and the battery when it is detected that the temperature of the battery cell exceeds a predetermined temperature.

4. The cold chain cabinet power supply system according to any one of claims 1 to 3, characterized in that: The control device comprises: A main control box, the main control box is connected to the voltage conversion device and the energy storage device respectively; the control device is used to obtain the output voltage and temperature of the energy storage device, and output them to the voltage conversion device so that the voltage conversion device adjusts the working state according to the output voltage and temperature of the energy storage device; a first relay, wherein a static contact of the first relay is connected to the positive port of the third end of the voltage conversion device, and a moving contact is connected to the energy storage device; and a coil of the first relay is connected to the main control box; A second relay, wherein the static contact of the second relay is connected to the negative port of the third end of the voltage conversion device, and the moving contact is connected to the energy storage device; and the coil of the second relay is connected to the main control box.

5. The cold chain cabinet power supply system according to any one of claims 1 to 3, characterized in that: The voltage conversion device comprises: A switch assembly, wherein a first end of the switch assembly is connected to the charging interface, and a second end of the switch assembly is connected to the discharging interface; A control unit, the control unit being connected to the control end of the switch assembly; the control unit being used to control the switch assembly to conduct the passage between the charging interface and the discharge interface when the discharge interface is connected to the cold chain cabinet and the charging interface is connected to the mains, so that the mains connected to the charging interface supplies power to the cold chain cabinet; An energy storage bidirectional converter, wherein a first end of the energy storage bidirectional converter is connected to the charging interface, a second end of the energy storage bidirectional converter is connected to the discharging interface, and a third end of the energy storage device is connected.

6. A cold chain cabinet power supply device, characterized in that: The cold chain cabinet power supply device includes a chassis and a cold chain cabinet power supply system as described in any one of claims 1 to 5.

7. The cold chain cabinet power supply device according to claim 6, characterized in that: The cold chain cabinet power supply device comprises: A battery pack, comprising a plurality of batteries as claimed in claim 2; An aerosol fire extinguishing system, wherein the aerosol fire extinguishing system is arranged on the upper surface of the battery pack; the aerosol fire extinguishing system is used to release aerosol to the battery pack when it is detected that the temperature of the battery pack is greater than a first set temperature value.

8. The cold chain cabinet power supply device according to claim 7, characterized in that: The cold chain cabinet power supply device also includes: Cooling fan; A mounting hole is formed on the surface of the chassis shell, and the heat dissipation fan is arranged in the mounting hole.

9. The cold chain cabinet power supply device according to claim 8, characterized in that: The cold chain cabinet power supply device also includes: A rain cover is arranged on the surface of the chassis and covers the opening of the mounting hole.

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