CN218986378U - Cooling system - Google Patents

Abstract

The utility model provides a cooling system, which comprises a cooling unit with a cooling circulation loop, wherein the cooling unit comprises a cooling circulation assembly, a detection assembly, a switching valve and a controller electrically connected with the detection assembly and the switching valve, the cooling circulation assembly comprises an access device, a summarizing device, a main radiator, a pump source, a storage medium box and a shunting device, at least two secondary branches which are arranged in parallel are arranged between the summarizing device and the shunting device, and the access device is connected to at least one secondary branch; wherein the type of access device comprises a charging gun; when only one secondary branch is connected to the charging gun, the secondary branches without the charging gun are provided with switch valves; when at least two secondary branches are connected into the charging gun, all secondary branches are provided with switch valves. The same cooling system can cool a plurality of charging guns and the secondary branches where the charging guns are located operate independently, so that the cost is greatly saved, the excessive high or low temperature of any charging gun is avoided, and the normal use of the charging gun is ensured.

Description

Cooling system

Technical Field

The utility model relates to the technical field of charging piles, in particular to a cooling system.

Background

For the continuous mileage anxiety of the new energy automobile, before the energy density of the battery pack has no revolutionary break, the charging time of the new energy automobile is shortened, compared with the charging time of the new energy automobile carrying more batteries, the continuous mileage is improved, and the understanding anxiety of drivers and passengers can be relieved. Therefore, quick charging, especially super quick charging, becomes a trend of development of new energy industry.

In the related art, the charging gun and the charging module of the charging pile use the same cooling system, and as the heat productivity difference between the charging gun and the charging module is large, parameters such as inlet and outlet temperature and pressure of the charging gun cannot be controlled in a reasonable range, so that the temperature of the charging gun is easily too high or too low, and the normal use of the charging gun is influenced; on the other hand, one cooling system is arranged for radiating heat of one charging gun, and a plurality of cooling systems are required to be arranged in the case that one charging pile is provided with a plurality of charging guns, so that the cost is high.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a cooling system, which aims to solve the defects in the related art to a certain extent.

In order to solve the technical problems, the utility model provides a cooling system, which comprises a cooling unit with a cooling circulation loop, wherein the cooling unit comprises a cooling circulation assembly, a detection assembly, a switch valve, an access device and a controller electrically connected with the detection assembly and the switch valve, the cooling circulation assembly comprises a summarizing device, a main radiator, a pump source, a storage medium box and a flow dividing device which are sequentially connected into a closed circulation loop, at least two secondary branches which are arranged in parallel are arranged between the summarizing device and the flow dividing device, the access device is connected onto at least one secondary branch, the detection assembly is used for detecting inlet and outlet temperatures and pressures of the secondary branches, and the controller is electrically connected with the pump source and the main radiator; the type of the access device comprises a charging gun, and when only one secondary branch is accessed to the charging gun, the secondary branches without the charging gun are provided with the switch valves; when at least two secondary branches are connected into the charging gun, all secondary branches are provided with the switch valves.

Preferably, the type of the access device further includes a secondary radiator for radiating heat to the heat generating component, and when the secondary radiator is accessed to the secondary branch, the secondary radiator corresponding to the secondary branch and the primary radiator form an air conditioning effect together.

Preferably, the cooling system is provided with a plurality of cooling units which are arranged in parallel, and two summarizing devices and two shunting devices in any two cooling units are communicated to form two parallel branches, and each parallel branch is provided with the switch valve.

Preferably, the summarizing device and the shunting device are respectively provided with a main interface, a parallel interface and a secondary interface which are mutually communicated, the secondary interface of the summarizing device is communicated with the secondary interface of the shunting device to form a secondary branch, the main radiator is communicated with the main interface of the summarizing device, the pump source is communicated with the main interface of the shunting device, and the parallel interfaces of two summarizing devices in any two cooling units and the parallel interfaces of two shunting devices are communicated to form the parallel branch.

Preferably, the detection assembly comprises a pressure sensor and a temperature sensor, both of which are disposed on the secondary interface.

Preferably, the cooling circulation assembly further comprises a bottom plate and a side plate fixed on the surface of the bottom plate, the main radiator and the pump source are both fixed on the bottom plate, the medium storage tank is fixed on the side plate and located on one side, away from the bottom plate, of the pump source, the summarizing device and the flow dividing device are fixed on one end, away from the pump source, of the medium storage tank, and the medium storage tank is located between the radiator and the side plate.

Preferably, the medium storage tank comprises a shell with a storage cavity and a filter element fixed in the storage cavity, the shell comprises a shell with the storage cavity and a cover plate which is connected with the shell in a covering mode and seals the storage cavity, and the outline dimension of the filter element is smaller than that of the cover plate.

Preferably, the main radiator comprises a radiating body with a coil structure and a fan fixed on the radiating body, wherein the fan is used for driving outside air to blow towards the coil structure.

Preferably, the cooling medium of the cooling system includes any one of a cooling liquid and a cooling gas.

Preferably, the cooling liquid includes any one of water, an ethylene glycol antifreeze liquid, oil, and an electronic fluoridation liquid.

Compared with the prior art, the cooling system has the beneficial effects that: because only one secondary branch is connected to the charging gun, the secondary branches without the charging gun are provided with switch valves; when at least two secondary branches are connected into the charging guns, all the secondary branches are provided with switch valves, so that the secondary branches where each charging gun is located can be controlled to operate independently by controlling the switch valves to be opened and closed, namely, when the same cooling system cools a plurality of charging guns, the secondary branches where each charging gun is located can be adjusted independently. A plurality of branches are formed through the summarizing device and the shunting device, and a cooling system can cool a plurality of charging guns at the same time, so that the cost is greatly saved; meanwhile, the branch circuit where the charging guns are controlled to independently operate through the switch valve, parameters such as inlet and outlet temperatures and pressures of all the charging guns can be timely controlled within a reasonable range, the temperature of any charging gun is prevented from being too high or too low, and the normal use of the charging gun is ensured.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model and that other drawings may be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a cooling system according to an embodiment of the present utility model provided with only one cooling unit;

FIG. 2 is a schematic diagram of a cooling system according to an embodiment of the present utility model having two cooling units arranged in parallel;

FIG. 3 is a schematic view of a cooling circulation assembly in a cooling system according to an embodiment of the present utility model;

FIG. 4 is a rear view of a cooling circulation assembly in a cooling system according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of the structure of a summing device and a shunting device in a cooling system according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a heat dissipating body in a cooling system according to an embodiment of the present utility model;

FIG. 7 is a front view of a primary radiator in a cooling system according to an embodiment of the utility model;

FIG. 8 is an exploded view of a portion of the structure of a storage medium tank in a cooling system according to an embodiment of the present utility model.

In the drawings, each reference numeral denotes: 1. a detection assembly; 11. a pressure sensor; 12. a temperature sensor; 2. a switch valve; 3. summarizing devices; 4. a main radiator; 41. a heat dissipation body; 42. a blower; 5. a pump source; 6. a shunt device; 7. a main interface; 8. a parallel interface; 9. a secondary interface; 10. a storage medium tank; 101. a housing; 102. a cover plate; 103. a storage chamber; 20. a bottom plate; 30. and a side plate.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Examples:

referring to fig. 1 to 8, an embodiment of the present utility model provides a cooling system, including a cooling unit having a cooling circulation loop, the cooling unit includes a cooling circulation assembly, a detection assembly 1, a switch valve 2, an access device, and a controller electrically connected to the detection assembly 1 and the switch valve 2, the cooling circulation assembly includes a summary device 3, a main radiator 4, a pump source 5, a storage medium tank 10, and a shunt device 6 sequentially connected into a closed circulation loop, at least two secondary branches arranged in parallel are provided between the summary device 3 and the shunt device 6, the access device is connected to at least one secondary branch, the detection assembly 1 is used for detecting inlet and outlet temperatures and pressures of the secondary branches, and the controller is electrically connected to the pump source 5 and the main radiator 4; the type of the access device comprises a charging gun, and when only one secondary branch is accessed to the charging gun, the secondary branches without the charging gun are provided with switch valves 2; when at least two secondary branches are connected into the charging gun, all secondary branches are provided with switch valves 2.

It should be understood that the control assembly is used for adjusting the operation parameters of the main radiator 4 and the pump source 5 according to the detection result of the detection assembly 1, and for controlling the opening and closing of the on-off valve 2. Because only one secondary branch is connected to the charging gun, the secondary branches without the charging gun are provided with the switch valve 2; when at least two secondary branches are connected into the charging guns, all the secondary branches are provided with the switch valve 2, so that the secondary branches where each charging gun is located can be controlled to independently operate by controlling the switch valve 2 to be opened and closed, namely, when the same cooling system cools a plurality of charging guns, the secondary branches where each charging gun is located can be independently regulated. A plurality of branches are formed through the summarizing device 3 and the shunting device 6, and a cooling system can cool a plurality of charging guns at the same time, so that the cost is greatly saved; meanwhile, the branch circuit where the charging guns are controlled to independently operate through the switch valve 2, parameters such as inlet and outlet temperatures and pressures of all the charging guns can be timely controlled within a reasonable range, the temperature of any charging gun is prevented from being too high or too low, and the normal use of the charging gun is ensured.

It should be noted that, in the related technical solution, the flow radius in the tube of the cooling tube of the charging gun is small, and the cooling tube is relatively long, for example, when the length of the cooling tube of the charging gun is greater than a certain length (such as 1m, 2m, 3m, etc.), the water resistance of the loop where the charging gun is located is already greater than the water resistance of the loop where the charging module is located, and at this time, if the charging gun still shares a cooling system with the charging module, the length of the cooling tube of the charging gun is greatly limited, thereby limiting the length of the cable of the charging gun and shortening the distance between the new energy automobile and the charging pile. Therefore, the pump source 5 corresponding to the charging gun must provide enough lift to overcome the resistance loss generated by the cooling tube of the charging gun, so as to ensure the length of the cable of the charging gun, so that the new energy automobile can keep a sufficient distance from the charging pile when being charged, and can be charged with vehicles with more parking spaces.

Referring to fig. 1, 3 and 5, in one embodiment, the type of the access device further includes a secondary radiator for radiating heat from the heat generating component, when the secondary radiator is accessed to the secondary branch, the secondary radiator and the primary radiator of the corresponding secondary branch together form an air conditioning effect, and heat absorbed by the secondary heat radiation is transferred to the primary radiator through the cooling liquid, and finally the primary radiator radiates heat to the surrounding environment. Specifically, the heating component can be a device such as a current divider and a fuse fixed in the electric control cabinet of the charging pile, the secondary radiator is equivalent to an inner machine of the air conditioner, and the primary radiator 4 is equivalent to an outer machine of the air conditioner, so that the secondary radiator can reduce the temperature in the electric control cabinet, thereby cooling the heating component, being beneficial to ensuring the normal work of the charging pile, and further ensuring the normal work of the charging gun. It should be understood that whether the secondary radiator is connected to the secondary branch is set according to actual requirements, and when the detecting assembly 1 detects that the temperature of the heating element is greater than the set temperature, the secondary branch switch valve 2 where the secondary radiator is located is opened; when the temperature detected by the detection component 1 is smaller than the set temperature, the secondary branch switch valve 2 where the secondary radiator is positioned is closed; the set temperature is a protection temperature set according to the characteristics of the heating element.

When only one secondary branch is connected to the charging gun, the secondary branch without the charging gun can be connected to the secondary radiator, and the secondary branch can be directly plugged; for example, one of the two secondary branches is connected to the charging gun, the other secondary branch is connected to the secondary radiator and is provided with a switch valve 2, and at the moment, the operation parameters of the secondary branch where the charging gun is positioned can be controlled by controlling the opening and closing of the switch valve 2; one of the three secondary branches is connected to the charging gun, one secondary branch is connected to the secondary radiator and is provided with a switch valve 2, and the other secondary branch is plugged by the switch valve 2 which is normally closed. When at least two secondary branches are connected into the charging gun, all the secondary branches are provided with switch valves 2; for example, two secondary branches are connected into the charging guns and are provided with switch valves 2, so that the control of the branch where each charging gun is located is realized.

Referring to fig. 2, in one embodiment, the cooling system is provided with a plurality of cooling units arranged in parallel, and two summarizing devices 3 and two dividing devices 6 in any two cooling units are communicated to form two parallel branches, and each parallel branch is provided with a switch valve 2. By controlling the opening and closing of the switch valve 2, the two cooling units can be arranged in parallel or independently, and the cooling effect of the cooling system can be further improved by arranging the two cooling units in parallel.

Referring to fig. 2, 3 and 5, in one embodiment, the summarizing device 3 and the shunting device 6 each have a primary interface 7, a parallel interface 8 and a secondary interface 9 that are mutually communicated, the secondary interface 9 of the summarizing device 3 and the secondary interface 9 of the shunting device 6 are communicated to form a secondary branch, the primary radiator 4 is communicated with the primary interface 7 of the summarizing device 3, the pump source 5 is communicated with the primary interface 7 of the shunting device 6, and the parallel interfaces 8 of the two summarizing devices 3 and the parallel interfaces 8 of the two shunting devices 6 in any two cooling units are communicated to form a parallel branch. Specifically, the summarizing device 3 and the shunting device 6 are water distributors, and the specification of the summarizing device 3 and the shunting device 6 is the same, so that the production cost can be reduced, and the probability of installation errors can be reduced; the primary interface 7 and the parallel interface 8 may be threaded interfaces, in particular 1/2G threaded interfaces, and the secondary interface 9 may be threaded interfaces, in particular 1/4G threaded interfaces, i.e. the aperture of the secondary interface 9 is smaller than the apertures of the primary interface 7 and the parallel interface 8.

It should be noted that, because different types of charging guns exist in the market, the cooling tube of the charging gun has two tubes of one inlet and one outlet, or three tubes of one inlet and two outlets, or four tubes of two inlets and two outlets. The front and side of the water separator are provided with a main interface 7, a parallel connection interface 8 and four secondary interfaces 9, when the secondary interfaces 9 are insufficient and the parallel connection interfaces 8 are idle, the parallel connection interfaces 8 can be converted into the secondary interfaces 9 through a threaded adapter, so that more detection assemblies 1 can be connected, and more charging guns or secondary radiators can be connected.

Referring to fig. 3, 4 and 5, in one embodiment, the detection assembly 1 includes a pressure sensor 11 and a temperature sensor 12, both of which are disposed on the secondary interface 9. Specifically, the pressure sensor 11 and the temperature sensor 12 are respectively disposed on the two secondary interfaces 9, that is, the pressure sensor 11 and the temperature sensor 12 detect the inlet and outlet pressure and temperature of the secondary branch where the charging gun is located and the inlet and outlet pressure and temperature of the secondary branch where the secondary radiator is located in the secondary interfaces 9, the controller calculates the inlet and outlet pressure difference and the temperature difference of the secondary branch where the charging gun is located and the inlet and outlet pressure difference and the temperature difference of the secondary branch where the secondary radiator is located, and then adjusts the operation parameters of the main radiator 4 and the pump source 5 to be in an optimal state according to a predetermined program. The secondary interfaces 9 may be provided in other numbers, such as four, five, six, etc., as desired.

It should be noted that, when the cooling system is provided with a cooling unit and only one secondary branch is connected to the charging gun, the cooling system is in a single gun working mode; when the cooling system is provided with a cooling unit and a plurality of secondary branches are connected into the charging gun, the cooling system is in a multi-gun working mode; when the cooling system is provided with a plurality of cooling units, the cooling system is in a cooling unit parallel operation mode.

In the single-gun working mode, after the controller receives a quick charging instruction of the charging gun, the controller controls the pump source 5 to operate at a certain initial rotating speed for 15 seconds according to a preset program, and then the detection assembly 1 detects the temperature and pressure of a liquid inlet and the temperature and pressure of a liquid outlet of a secondary branch where the charging gun is positioned and transmits the detection result to the controller; the controller receives the detection result, calculates the inlet-outlet temperature difference and the inlet-outlet pressure difference, compares the inlet-outlet temperature difference and the inlet-outlet pressure difference with the calibration value, and determines the optimal operation parameters of the main radiator 4 and the pump source 5; the calibration value refers to inlet and outlet temperature differences and inlet and outlet pressure differences of the charging gun tested in various working modes of a laboratory. It should be understood that the secondary radiator may be connected in the secondary branch at this time according to actual needs.

In the multi-gun working mode, after the controller receives a quick charging instruction of a charging gun, the controller controls the pump source 5 to operate at a certain initial rotating speed for 15 seconds according to a preset program, and then the detection assembly 1 detects the temperature and pressure of a liquid inlet and the temperature and pressure of a liquid outlet of a secondary branch where the charging gun is positioned and transmits the detection result to the controller; the controller receives the detection result, calculates the inlet-outlet temperature difference and the inlet-outlet pressure difference, and compares the inlet-outlet temperature difference and the inlet-outlet pressure difference with the calibration value, so that the optimal operation parameters of the main radiator 4 and the pump source 5 are determined. It should be understood that when the secondary branch is connected to the secondary radiator, the types and specifications of the charging guns are the same, so that the water resistance of the charging guns is completely consistent, and the heating power of the charging guns and the water resistance of the secondary branch where the charging guns are located are far greater than the heating power of the heating element and the water resistance of the secondary branch where the secondary radiator is located, so that any charging gun is selected as a reference, and the heat dissipation requirement of any secondary branch can be met.

In addition, when only one charging gun charges and other charging guns are idle and do not work, the idle charging gun cannot receive a charging instruction, and the switch valve 2 of the secondary branch where the idle charging gun is located is in a closed state, so that the corresponding cooling medium does not flow through the secondary branch where the idle charging gun is located. When the secondary branch circuit is connected to the secondary radiator, whether one charging gun is charged or a plurality of charging guns are charged, or no charging is in a standby state, and as long as the temperature of the secondary radiator is higher than a set temperature, the switch valve 2 of the secondary branch circuit where the secondary radiator is positioned is switched from a closed state to an open state; when the temperature of the secondary radiator is smaller than the set temperature, the switch valve 2 of the secondary branch where the secondary radiator is located is switched from an open state to a closed state.

In the cooling unit parallel operation mode, the plurality of cooling units are arranged in parallel, so that the cooling effect of the cooling system can be improved. Assuming that one cooling unit can only maintain the fast charge of two charging guns 500a for 10 minutes, if three charging guns are connected for fast charge, either the charging current is reduced or the fast charge time is shortened, and if two cooling units are connected in parallel, the effect of 1+1 > 2 can be achieved.

Firstly, under the condition that the parking space of the charging pile is not full, users often favor one side of the charging pile, which is more convenient to park, to park and charge, and at the moment, the idle cooling units caused by inconvenient parking can be utilized, so that the quick charging requirements of more vehicles are met; second, the fast fill on the market typically requires only the first 10 minutes, e.g., from 20% to 80% within 10 minutes, after 10 minutes, allowing the input power to be reduced. If two fill electric pile adopts the mode of independently charging each, can only maintain the 500A of four rifle that charges and fill soon 10 minutes, if fill electric pile two the inside two liquid cooling units parallelly connected together, can maintain five rifle 500A and fill soon 10 minutes. Because the steps of the first vehicle and the second vehicle are inconsistent, when the fifth vehicle starts to be charged quickly, the first vehicle is charged quickly for 10 minutes, the power is reduced to enter a slow charging state, at the moment, the switch valve 2 of the secondary branch where the charging gun corresponding to the first vehicle is located can be closed according to a preset program, and the charging gun can maintain the residual charging requirement without cooling the cooling liquid because the charging power is small. If one cooling unit can meet the heat dissipation requirement, the switching valve 2 between the other cooling units connected in parallel is closed according to a predetermined procedure, preventing the occurrence of reverse flow.

Referring to fig. 3 and 4, in one embodiment, the cooling circulation assembly further includes a bottom plate 20 and a side plate 30 fixed on the plate surface of the bottom plate 20, the main radiator 4 and the pump source 5 are both fixed on the bottom plate 20, the storage medium tank 10 is fixed on the side plate 30 and located on one side of the pump source 5 away from the bottom plate 20, the summarizing device 3 and the flow dividing device 6 are fixed on one end of the storage medium tank 10 away from the pump source 5, and the storage medium tank 10 is located between the radiator and the side plate 30, so that the external dimension of the cooling circulation assembly is smaller, which is beneficial to meeting miniaturization of the charging pile.

In order to meet the requirement of miniaturization of the charging pile, according to practical needs, the external dimensions of the cooling circulation assembly are small (for example, the heights are smaller than 400mm, 500mm, 600mm, etc., the widths are smaller than 300mm, 400mm, 500mm, etc.), so that the windward side of the main radiator 4 is insufficient, and the heat dissipation capacity of the cooling system is limited. Therefore, when the number of heat loads such as the charging gun provided in the cooling unit is too large, the heat dissipation requirement cannot be satisfied even if the main radiator 4 is at the maximum power, and at this time, a plurality of cooling units may be arranged in parallel, so as to satisfy the heat dissipation requirement.

Referring to fig. 3, 4 and 8, in one embodiment, the storage medium tank 10 includes a housing 101 having a storage chamber 103 and a filter member fixed in the storage chamber 103, the housing 101 including a case having the storage chamber 103 and a cover plate 102 coupled to the case in a covering manner and sealing the storage chamber 103, and the filter member has an outer dimension smaller than an outer dimension of the cover plate 102. Specifically, the cover plate 102 is a top cover, and when the cover plate 102 is opened, the filter element can freely enter and exit from the top of the storage medium box 10; a sealing strip is arranged between the cover plate 102 and the shell, and the cover plate 102 is fixed with the shell through screws. The filter element may be a filter cartridge with small pore sizes that are selected to allow passage of the smallest particle diameter as permitted by the radiator, pump source 5, etc., and the outer volume of the filter element may occupy the entire reservoir 103 to facilitate filtration of the cooling medium.

It should be noted that, impurities such as welding slag and the like generated in the welding process of the storage medium tank 10 fall into the tank bottom, and because the opening of the storage medium tank 10 is arranged, the welding slag is convenient to clean, and meanwhile, the welding process and the passivation process of the storage medium tank 10 are convenient to check. Because the filter element is arranged in the medium storage box 10, the filter element is more attractive, the flow area of the meshes of the filter cartridge can be expanded, and the water resistance is reduced; and when the filter element is replaced or cleaned, the cooling liquid remained in the filter element can fall into the medium storage box 10, so that the cooling liquid does not need to be scattered outside the cooling unit to pollute the cooling unit during replacement.

Referring to fig. 3, 6 and 7, in one embodiment, the main radiator 4 includes a heat dissipation body 41 having a coil structure and a fan 42 fixed to the heat dissipation body 41, and the fan 42 is used to drive air from outside to blow toward the coil structure, so that the fan 42 is started to force heat dissipation when a cooling medium flows through the coil.

In one embodiment, the cooling medium of the cooling system comprises either a cooling liquid or a cooling gas, i.e. the cooling system may be selectively liquid cooled or air cooled. Wherein the cooling liquid comprises any one of ethylene glycol antifreeze, oil and electronic fluoridation liquid. When the cooling medium is cooling liquid, the working principle of the cooling system is as follows: the high-temperature and high-heat cooling liquid in the charging gun flows into the main radiator 4 through the summarizing device 3, the cooling liquid subjected to heat dissipation and cooling through the main radiator 4 flows into the storage medium box 10, is pressurized through the pump source 5, is pumped into the flow dividing device 6, flows into the secondary branch of the charging gun after being distributed through the flow dividing device 6, takes away the cable and gun head heat of the charging gun, and is repeatedly circulated to finish cooling of the charging gun. Furthermore, when the cooling system is provided with only one cooling unit, the on-off valve 2 must be provided between the tapping device 6 and the tapping device, avoiding the backflow of the cooling liquid.

Specifically, when oil is selected as the cooling medium, the water resistance is increased due to the fact that the oil is too viscous at low temperature, and even if the rotation speed of the pump source 5 is opened to the maximum, the flow rate of the cooling liquid is very small, namely, the charging gun cannot complete quick charging under the condition that the ambient temperature is low enough; moreover, the maximum pressure of the pump source 5 exceeds the allowable working pressure of the cooling tube of the charging gun, for example, more than 1MPA, which not only shortens the working life of the charging gun, but also brings the risk of tube explosion. Therefore, the rotation speed of the pump source 5 is firstly regulated to be lower, the charging power of the charging gun is reduced, the cooling medium in the charging gun is heated through self-heating of the charging gun, and the charging gun starts to perform quick charging after the cooling medium reaches a certain temperature and the cooling medium flow rises to a certain flow, so that a low-temperature preheating working mode is formed. If no car is charged for a long time under the low temperature condition, the charging pile is in a standby state for a long time, and the pump source 5 is started every 15 minutes or half an hour to prevent the oil temperature from dropping down.

And under the low-temperature preheating working mode, the on-off valve 2 of the secondary branch where the secondary radiator is positioned is opened, the pipe flow radius of the coil pipe inner pipeline of the secondary radiator is larger than the pipe flow radius of the cooling pipe of the charging gun due to the fact that the secondary branch pipeline is shorter, and the coil pipe inner pipeline of the secondary radiator can adopt a parallel mode, so that the water resistance of the secondary branch is smaller than the water resistance of the secondary branch where the charging gun is positioned. After the switch valve 2 is opened, the liquid inlet and the liquid outlet of the cooling pipe of the charging gun are in short circuit, the overall water resistance of the secondary branch where the charging gun is positioned is greatly smaller than that before the switch valve 2 is opened, at the moment, the pump source 5 can operate at a higher rotating speed, even the maximum rotating speed, and the maximum pressure of the pump source 5 is within a reasonable range. The design not only reduces the risk of tube explosion, but also can fully utilize the self-heating of the pump source 5 to rapidly increase the temperature of the cooling medium, and brings the heat generated by the heating element into the cooling system, so that the temperature rising speed of the cooling medium is faster.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The cooling system comprises a cooling unit with a cooling circulation loop, and is characterized by comprising a cooling circulation assembly, a detection assembly, a switch valve, an access device and a controller electrically connected with the detection assembly and the switch valve, wherein the cooling circulation assembly comprises a summarizing device, a main radiator, a pump source, a storage medium box and a flow dividing device which are sequentially connected into a closed circulation loop, at least two secondary branches which are arranged in parallel are arranged between the summarizing device and the flow dividing device, the access device is connected onto at least one secondary branch, the detection assembly is used for detecting inlet and outlet temperatures and pressures of the secondary branches, and the controller is electrically connected with the pump source and the main radiator;

the type of the access device comprises a charging gun, and when only one secondary branch is accessed to the charging gun, the secondary branches without the charging gun are provided with the switch valves; when at least two secondary branches are connected into the charging gun, all secondary branches are provided with the switch valves.

2. The cooling system of claim 1, wherein the type of access device further comprises a secondary heat sink for dissipating heat from the heat-generating component, the secondary heat sink of a corresponding secondary branch and the primary heat sink together forming an air conditioning effect when the secondary heat sink is accessed to the secondary branch.

3. The cooling system according to claim 1, wherein the cooling system is provided with a plurality of cooling units arranged in parallel, two summarizing devices in any two cooling units are communicated with each other and two shunting devices are communicated with each other to form two parallel branches, and each parallel branch is provided with the switch valve.

4. A cooling system according to claim 3, wherein the collecting device and the distributing device each have a main interface, a parallel interface and a secondary interface which are mutually communicated, the secondary interface of the collecting device and the secondary interface of the distributing device are communicated to form a secondary branch, the main radiator is communicated with the main interface of the collecting device, the pump source is communicated with the main interface of the distributing device, and the parallel interfaces of two collecting devices in any two cooling units and the parallel interfaces of two distributing devices are communicated to form the parallel branch.

5. The cooling system of claim 4, wherein the detection assembly includes a pressure sensor and a temperature sensor, the pressure sensor and the temperature sensor each disposed on the secondary interface.

6. The cooling system of claim 1, wherein the cooling circulation assembly further comprises a bottom plate and a side plate secured to the bottom plate face, the main radiator and the pump source are both secured to the bottom plate, the storage medium tank is secured to the side plate and located on a side of the pump source remote from the bottom plate, the summarizing means and the flow dividing means are secured to an end of the storage medium tank remote from the pump source, and the storage medium tank is located between the radiator and the side plate.

7. The cooling system of claim 1, wherein the storage medium tank includes a housing having a storage chamber and a filter member fixed in the storage chamber, the housing including a housing having the storage chamber and a cover plate closing the housing and sealing the storage chamber, the filter member having an outer dimension smaller than an outer dimension of the cover plate.

8. The cooling system of claim 1, wherein the primary radiator includes a heat dissipating body having a coil structure and a fan secured to the heat dissipating body for driving outside air toward the coil structure.

9. The cooling system of claim 1, wherein the cooling medium of the cooling system comprises any one of a cooling liquid and a cooling gas.

10. The cooling system of claim 9, wherein the cooling fluid comprises any one of water, glycol antifreeze, oil, and electronic fluorinated fluid.

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