Liquid cooling charging host and power supply system

Abstract

The utility model discloses a liquid cooling charging host computer and power supply system, including charging host computer main part, main stage heat abstractor, first secondary heat abstractor and second secondary heat abstractor. This technical scheme is through setting first secondary heat abstractor and second secondary heat abstractor in the inside of charging host computer main part, carries out local heat guidance and management to copper bar and alternating current contactor temperature sensitive device respectively, combines the main stage heat abstractor of setting in the outside of main part and forms " master-slave " heat dissipation structure, can gather the heat of various heat sources and export to the outside environment effectively, realizes the grading control and concentrated heat dissipation of the internal multi -source heat of charging host computer, avoids the heat dissipation of only main power module in prior art, ignores copper bar and sensitive device heat management phenomenon, improves whole machine temperature control precision and reliability, guarantees that charging system long -term stable operation and satisfies the specification requirement of temperature rise of country.

Description

Technical Field

[0001] This utility model relates to the field of charging technology, and in particular to a liquid-cooled charging host and power supply system. Background Technology

[0002] With the rapid development of new energy vehicles and charging infrastructure, liquid-cooled charging piles are widely used in high-power DC fast charging scenarios due to their excellent thermal management performance. Existing liquid-cooled charging piles generally adopt a water pump-driven coolant circulation cooling method. That is, the water pump pushes the coolant to flow between the charging module, water distributor, and radiator, transferring the heat generated by the charging module during operation to the radiator located outside the cabinet. Then, the external fan exhausts the heat to the outside atmosphere through forced convection.

[0003] These liquid-cooled charging piles rely solely on liquid cooling systems to dissipate heat from the main power modules, effectively controlling the temperature rise of core components. However, related technologies generally suffer from the following shortcomings: Single heat dissipation target: Existing liquid cooling systems are mostly designed to cool only the charging modules that generate the most heat, neglecting the heat accumulation in structural conductive components such as copper busbars; Insufficient protection for thermally sensitive devices: Although AC contactors and auxiliary power supplies generate little heat, they are highly temperature sensitive. If exposed to high temperatures for extended periods, they are prone to performance degradation or failure, affecting the stable operation of the charging pile; Uneven temperature distribution: The internal space of the charging host is compact, and multiple heat sources are unevenly distributed. Without a refined thermal management mechanism, localized overheating and uneven overall temperature rise can easily occur. Utility Model Content

[0004] The main objective of this invention is to provide a liquid-cooled charging host and power supply system to solve the technical problems existing in related technologies.

[0005] To achieve the above objectives, this utility model provides the following technical solution: In a first aspect, this utility model provides a liquid-cooled charging host, including a charging host body, a main heat dissipation component, a first-stage heat dissipation component, and a second-stage heat dissipation component. The primary heat dissipation component and the secondary heat dissipation component are disposed inside the main body of the charging host. The main body of the charging host is provided with copper busbars and AC contactors. The primary heat dissipation component is disposed on the main body of the charging host, and at least a portion of it is exposed relative to the main body of the charging host. The primary heat dissipation component is used to guide the heat generated by the copper busbar to the main heat dissipation component, the secondary heat dissipation component is used to guide the heat generated by the AC contactor to the main heat dissipation component, and the main heat dissipation component is used to exhaust the heat generated by the copper busbar and the AC contactor to the outside of the charging host body.

[0006] A second aspect of this utility model provides a power supply system, including a power supply and a liquid-cooled charging host as described in the first aspect, wherein the power supply is electrically connected to the liquid-cooled charging host, and the liquid-cooled charging host is used to transmit the power supply voltage to an external charging device.

[0007] This utility model discloses a liquid-cooled charging host and power supply system. By setting a primary heat dissipation component and a secondary heat dissipation component inside the charging host body, local heat guidance and management are carried out on temperature-sensitive devices such as copper busbars and AC contactors. Combined with the main heat dissipation component set on the outside of the main body, the heat generated by various heat sources can be effectively collected and discharged to the external environment. This achieves hierarchical control and centralized heat dissipation of multi-source heat inside the charging host, avoiding the phenomenon in the prior art of only dissipating heat on the main power module and neglecting the thermal management of copper busbars and sensitive devices. This improves the temperature control accuracy and reliability of the whole machine, ensures the long-term stable operation of the charging system and meets the national standard requirements for temperature rise. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A schematic diagram of a liquid-cooled charging host provided in an embodiment of this application; Figure 2 This is a schematic diagram of the coolant circulation system in the liquid-cooled charging host provided in an embodiment of this application; Figure 3 for Figure 1 A magnified view of a portion of the image; Figure 4 This is a schematic diagram of a sheet metal housing in an embodiment of this application.

[0010] Reference numerals: 10-Charging host body; 101-Copper busbar; 102-Liquid-cooled charging module; 103-AC contactor; 1011-Sheet metal housing; 104-Door; 20-Main stage heat dissipation assembly; 201-Main heat dissipation fan; 202-Main radiator; 30-Second stage heat dissipation assembly; 301-Second heat dissipation fan; 302-Second radiator; 40-First stage heat dissipation assembly; 401-First radiator; 402-First heat dissipation fan; 41-Expansion tank; 42-Water pump; 43-Solenoid valve; 50-Turbulence fan; Detailed Implementation To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0011] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0012] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The term "multiple" means two or more, unless otherwise explicitly specified. The term "comprising" indicates the presence of the described feature, whole, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or sets thereof. The term "and / or" describes the relationship between related objects, indicating that three relationships may exist. For example, A and / or B may include three cases: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0013] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art; the terms used in the embodiments of this application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification, claims and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.

[0014] Furthermore, terms such as "exemplary," "for example," and "optional" are used to indicate illustrative purposes. Any technical solution described by the above terms in the embodiments of this application should not be construed as being more preferred or advantageous than other technical solutions. Specifically, these terms are intended to present the relevant technical concepts in terms of specific implementation methods.

[0015] Please refer to them in order. Figures 1 to 4This application provides a liquid-cooled charging host, which includes at least a charging host body 10, a main heat dissipation component 20, a primary heat dissipation component 40, and a secondary heat dissipation component 30.

[0016] The main body 10 of the charging host has a structure with an internal closed cavity. Inside it are multiple heat-generating devices, including a copper busbar 101, an AC contactor 103, a liquid-cooled charging module 102, and an auxiliary power supply (not shown in the figure). The liquid-cooled charging module 102 is used to charge external devices.

[0017] The primary heat dissipation component 40 is located in the area adjacent to the copper busbar 101 inside the charging host body 10, and is used to guide the heat generated by the copper busbar 101 to the primary heat dissipation component 20 through air cooling and / or water cooling.

[0018] The secondary heat dissipation component 30 is located in the area near the AC contactor 103 inside the charging host body 10. Its structure is similar to that of the primary heat dissipation component 40. It is mainly used to guide the heat generated by the AC contactor 103 to the primary heat dissipation component 20 through air cooling and / or water cooling.

[0019] The main heat dissipation component 20 is mounted on the main body 10 of the charging host, with at least a portion of its structure exposed outside the main body. For example, the main heat dissipation component 20 is mounted on the rotatable door 104 of the main body 10, with one side positioned close to the outside of the main body and the other side positioned close to the inside of the main body. Thus, the main heat dissipation component 20 can, on the one hand, dissipate the heat generated by the copper busbar 101 and the AC contactor 103 to the outside of the charging host 100 through air cooling, and on the other hand, guide the heat generated by the copper busbar 101 and the AC contactor 103 to the coolant circulation system through water cooling.

[0020] As can be seen, the liquid-cooled charging host of this application embodiment, by setting a primary heat dissipation component and a secondary heat dissipation component inside the charging host body, conducts local heat guidance and management for temperature-sensitive devices such as copper busbars and AC contactors respectively. Combined with the primary heat dissipation component set outside the main body, a "master-slave" multi-level heat dissipation structure is formed. This can effectively collect and dissipate the heat generated by various heat sources to the external environment, realize the hierarchical control and centralized heat dissipation of multi-source heat inside the charging host, avoid the phenomenon in the prior art of only dissipating heat for the main power module and neglecting the thermal management of copper busbars and sensitive devices, improve the temperature control accuracy and reliability of the whole machine, ensure the long-term stable operation of the charging system and meet the national temperature rise standard requirements.

[0021] In an optional embodiment of this application, the primary heat dissipation component 40 includes a first heat dissipation fan 402 and a first heat sink 401.

[0022] Specifically, the first radiator 401 is disposed in the adjacent area of ​​the copper busbar 101 and forms indirect contact (not direct contact), and at least a portion thereof forms thermal contact with the copper busbar 101 through a first liquid cooling transmission component (e.g., a first liquid cooling pipe). The first liquid cooling transmission component may include a liquid cooling pipe, a cold plate, etc., and has internal channels for flowing coolant, which can circulate under the drive of a water pump.

[0023] During the operation of the charging host, the copper busbar 101 generates heat due to the current passing through it. This heat is absorbed by the coolant through the first liquid cooling transmission component and conducted to the first radiator 401. The first cooling fan 402 is located on the side close to the first radiator 401 and is used to drive airflow so that the heat on the surface of the first radiator 401 is quickly carried away and guided to the main heat dissipation component 20, thereby realizing the effective transfer and discharge of the heat generated by the copper busbar 101.

[0024] In an optional embodiment of this application, the secondary heat dissipation component 30 includes a second heat dissipation fan 301 and a second heat sink 302.

[0025] Specifically, the second radiator 302 is arranged in the vicinity of the AC contactor 103 and forms indirect contact (non-direct contact). At least a portion of it forms thermal contact with the AC contactor 103 through a second liquid-cooled transfer component (e.g., a second liquid-cooled pipe) to absorb the heat generated during operation. The second liquid-cooled transfer component can be a liquid-cooled plate, cooling pipe, or other structure for heat transfer of the coolant under controlled circulation.

[0026] During the operation of the charging host, when the AC contactor 103 experiences a local temperature rise due to prolonged operation, the heat generated is absorbed by the coolant through the second liquid cooling transmission component and conducted to the second radiator 302. The second cooling fan 301 drives the airflow to quickly remove the heat from the radiator and guide it to the main heat dissipation component 20 for final external heat dissipation.

[0027] Furthermore, at least a portion of the second heat sink 302 is in thermal contact with the liquid-cooled charging module 102 via a third liquid-cooled transfer component. Specifically, the third liquid-cooled transfer component can be an independent liquid-cooled plate with a cavity. As the coolant flows within the cavity of the liquid-cooled plate, it efficiently conducts the heat generated by the liquid-cooled charging module 102 during operation to the main heat dissipation component 20, ultimately achieving heat dissipation to the outside.

[0028] This embodiment, by setting up a primary heat dissipation component 40 and a secondary heat dissipation component 30, can achieve independent cooling management for devices that are sensitive to high temperatures but generate relatively little heat, such as AC contactors 103 and copper busbars 101, as well as devices that generate a lot of heat, such as liquid-cooled charging modules 102.

[0029] In an optional embodiment of this application, the main heat dissipation assembly 20 includes a main heat sink 202 and a main heat dissipation fan 201.

[0030] Specifically, the main heat sink 202 can be located on the top or side wall of the charging host body 10, and is connected to the first liquid cooling transmission component, the second liquid cooling transmission component and the third liquid cooling transmission component through the main liquid cooling transmission component, so as to collect and conduct heat from different heat sources.

[0031] The first liquid-cooled transmission component transfers heat generated by the copper busbar 101 to the main heat sink 202; the second liquid-cooled transmission component transfers heat generated by the AC contactor 103 to the main heat sink 202; and the third liquid-cooled transmission component transfers heat generated by the liquid-cooled charging module 102 to the main heat sink 202. A main cooling fan 201 is located on one side of the main heat sink 202 to force convection cooling of its surface heat, effectively dissipating the accumulated heat to the outside of the charging host body 10.

[0032] This embodiment, through the setting of the main heat dissipation component 20, utilizes its centralized heat dissipation function to achieve efficient heat collection and unified discharge from multiple heat sources, ensuring that the charging host has good heat dissipation performance and system stability under high power operation.

[0033] Please see Figure 2 The main body 10 of the charging host is also equipped with a coolant circulation system, which drives the coolant to circulate between the heat dissipation components at each level to achieve continuous heat transfer and exhaust.

[0034] Specifically, the coolant circulation system includes an expansion tank 41 and a water pump 42. The expansion tank 41 is used to regulate the volume and pressure of the coolant in the system to ensure the stable operation of the cooling circuit; the water pump 42 serves as a power source to drive the coolant circulation.

[0035] The output end of the expansion tank 41 is connected to the input ends of the first liquid cooling transmission component, the second liquid cooling transmission component and the third liquid cooling transmission component via the water pump 42, respectively, to deliver coolant to multiple heat source areas such as the copper busbar 101, the AC contactor 103 and the liquid cooling charging module 102.

[0036] In this embodiment, the outputs of the three components are connected to the input of the expansion tank 41 via the main liquid cooling transmission component, forming a closed liquid cooling circulation path. This configuration enables orderly circulation and efficient heat dissipation of the coolant between multiple heat-generating devices and the main radiator, ensuring that the heat generated by each component during operation is promptly carried away and transferred to the outside.

[0037] In an optional embodiment of this application, a solenoid valve 43 is also provided in the coolant circulation path to control the flow of coolant in each branch according to the system operating status, thereby realizing dynamic thermal management.

[0038] Specifically, each of the first liquid cooling transmission component, the second liquid cooling transmission component, and / or the third liquid cooling transmission component is equipped with a solenoid valve 43, which can open or close the corresponding circuit according to a preset control command.

[0039] For example, when the temperature of the copper busbar 101 exceeds the set threshold, the solenoid valve 43 in the first liquid cooling transmission component opens, allowing the coolant to enter the first radiator 401 for heat exchange; when the temperature drops back to a safe range, the solenoid valve automatically closes to prevent the coolant from circulating in this branch and causing energy waste.

[0040] This embodiment, by setting up such a controllable solenoid valve assembly, can realize the on-demand distribution and flow management of coolant among multiple heat dissipation branches, improve system energy efficiency, and at the same time avoid the phenomenon of water pump "idling" in unnecessary paths, thereby enhancing the economy and intelligence of the whole machine operation.

[0041] It should be understood that the solenoid valve 43 can be a solenoid ball valve, a solenoid gate valve, or other on / off valve structure with on / off control function. Its specific type can be selected according to the actual application scenario, fluid parameters and system control requirements, and is not limited to a specific form.

[0042] In an optional embodiment of this application, the main body 10 of the charging host is further provided with a control module (not shown in the figure) for intelligent control of the liquid cooling system.

[0043] The control module can collect temperature information of key parts inside the charging host and dynamically control the start / stop status and operating parameters of water pump 42, main cooling fan 201, first cooling fan 402, second cooling fan 301, and related fans and solenoid valves 43 in the main liquid cooling circulation path.

[0044] Specifically, when the temperature of components such as copper busbar 101, AC contactor 103, or liquid-cooled charging module 102, or the ambient temperature nearby, reaches a preset temperature rise threshold, the control module will issue a control command to drive the corresponding cooling fan to operate, open the solenoid valve on the corresponding branch, and adjust the water pump output power to achieve precise heat management. Conversely, when the temperature returns to below the set safe value, the control module automatically executes a shutdown or power reduction strategy to save energy and reduce system noise.

[0045] Please see Figure 3 and Figure 4The outer casing of the charging host body 10 includes at least one sheet metal shell 1011 corresponding to the mounting area of ​​the copper busbar 101. The sheet metal shell is used to cover the copper busbar area and form a heat exchange outer wall.

[0046] Specifically, the axial cross-section of the sheet metal housing 1011 has a curved structure, such as a wave-shaped or arc-shaped surface, to increase the effective heat dissipation area of ​​the outer surface of the sheet metal and improve the efficiency of heat radiation and natural convection.

[0047] In addition, a turbulence fan 50 is installed inside the main body of the charging host. The turbulence fan is installed around the copper busbar and blows air toward the sheet metal housing 1011 to form local forced convection.

[0048] In this embodiment, the turbulence fan 50 works in conjunction with the sheet metal housing 1011 to disperse the high-temperature accumulation area near the copper busbar by disturbing the internal airflow, thereby forming a more uniform temperature field distribution inside the charging host and effectively reducing local heat accumulation.

[0049] This application also provides a power supply system, including a power supply and a liquid-cooled charging host as described in the above embodiments. The power supply is electrically connected to the liquid-cooled charging host, which is used to transmit the power supply voltage to an external charging device.

[0050] The liquid-cooled charging host and power supply system of this application embodiment, by setting a primary heat dissipation component and a secondary heat dissipation component inside the charging host body, respectively guides and manages the local heat of temperature-sensitive devices such as copper busbars and AC contactors. Combined with the main heat dissipation component set outside the main body, it can effectively collect and discharge the heat generated by various heat sources to the external environment, realize the hierarchical control and centralized heat dissipation of multi-source heat inside the charging host, avoid the phenomenon in the prior art of only dissipating heat from the main power module and neglecting the thermal management of copper busbars and sensitive devices, improve the temperature control accuracy and reliability of the whole machine, ensure the long-term stable operation of the charging system and meet the national temperature rise standard requirements.

[0051] In addition, it has the following beneficial effects: 1) By adding multiple secondary heat sinks and secondary cooling fans, it also addresses the thermal management of non-primary heat sources such as copper busbars, AC contactors, and auxiliary power sources, ensuring that the overall temperature rise meets relevant standards. 2) By modifying the sheet metal, it helps increase the heat transfer area of ​​the sheet metal, improves the heat transfer effect of the flat wall, and helps increase the heat dissipation of the charging host. 3) Due to the fully enclosed design inside the charging host, the secondary cooling fans and turbulence fans circulate air entirely within the internal system, increasing heat dissipation without increasing the overall operating noise of the charging host. Furthermore, since the main cooling fan is installed outside the cabinet, a large-diameter axial fan can be selected. The change in airflow is roughly quadratically related to the change in the radius of blade rotation and roughly proportional to the change in speed. Therefore, under the same cooling airflow, the large-diameter axial fan has a lower speed and correspondingly lower noise. The internal space of the charging host is small, so only small-diameter fans can be installed. These fans have higher speeds and generate more noise, and the heat sources are dispersed, requiring multiple cooling fans and turbulence fans to be installed inside the charging host. However, since the charging unit is completely enclosed, with only internal air circulation and no external air circulation, noise cannot escape. This design will not increase the overall noise of the charging unit.

[0052] The specific embodiments of the utility model have been described in detail above, but they are only examples, and the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the utility model are also within the scope of the utility model. Therefore, all equivalent transformations, modifications, and improvements made without departing from the spirit and principles of the utility model should be covered within the scope of the utility model.

Claims

1. A liquid-cooled charging host, characterized in that, It includes the main body of the charging host, the main heat dissipation component, the first-stage heat dissipation component, and the second-stage heat dissipation component; The primary heat dissipation component and the secondary heat dissipation component are disposed inside the main body of the charging host. The main body of the charging host is provided with copper busbars and AC contactors. The primary heat dissipation component is disposed on the main body of the charging host, and at least a portion of it is exposed relative to the main body of the charging host. The primary heat dissipation component is used to guide the heat generated by the copper busbar to the main heat dissipation component, the secondary heat dissipation component is used to guide the heat generated by the AC contactor to the main heat dissipation component, and the main heat dissipation component is used to exhaust the heat generated by the copper busbar and the AC contactor to the outside of the charging host body.

2. The liquid-cooled charging host as described in claim 1, characterized in that, The primary heat dissipation component includes a first heat dissipation fan and a first heat sink; At least a portion of the first heat sink is in thermal contact with the copper busbar via a first liquid cooling transfer component; The first liquid-cooled transmission component is used to conduct the heat generated by the copper busbar to the first heat sink through the coolant, and the first heat sink fan is used to guide the heat generated by the copper busbar to the main heat sink assembly.

3. The liquid-cooled charging host as described in claim 2, characterized in that, The secondary heat dissipation assembly includes a second heat dissipation fan and a second heat sink; At least a portion of the second radiator is in thermal contact with the AC contactor via a second liquid-cooled transmission component; The second liquid-cooled transmission component is used to conduct the heat generated by the AC contactor to the second radiator through the coolant, and the second cooling fan is used to guide the heat generated by the AC contactor to the main heat dissipation assembly.

4. The liquid-cooled charging host as described in claim 3, characterized in that, The main body of the charging host is also equipped with a liquid-cooled charging module for charging external devices. At least a portion of the second heat sink is in thermal contact with the liquid-cooled charging module through a third liquid-cooled transmission component; The third liquid-cooled transmission component is used to conduct the heat generated by the liquid-cooled charging module to the main heat dissipation component through the coolant.

5. The liquid-cooled charging host as described in claim 4, characterized in that, The main heat dissipation assembly includes a main heat sink and a main heat dissipation fan; The main heat sink is connected to the first liquid cooling transmission component, the second liquid cooling transmission component, and the third liquid cooling transmission component respectively through the main liquid cooling transmission component; The first liquid-cooled transmission component, the second liquid-cooled transmission component, and the third liquid-cooled transmission component are respectively used to transfer the heat generated by the copper busbar, the AC contactor, and the liquid-cooled charging module to the main heat sink through the coolant. The main heat sink fan is used to exhaust the heat accumulated on the main heat sink to the outside of the charging host body.

6. The liquid-cooled charging host as described in claim 5, characterized in that, The charging host body is also equipped with a coolant circulation system; The coolant circulation system includes an expansion tank and a water pump. The output end of the expansion tank is connected to the input ends of the first liquid cooling transmission component, the second liquid cooling transmission component, and the third liquid cooling transmission component via the water pump. The output ends of the first liquid cooling transmission component, the second liquid cooling transmission component, and the third liquid cooling transmission component are connected to the input end of the expansion tank via the main liquid cooling transmission component.

7. The liquid-cooled charging host as described in claim 5, characterized in that, The first liquid-cooled transmission component is equipped with a solenoid valve; and / or, the second liquid-cooled transmission component is equipped with a solenoid valve; and / or, the third liquid-cooled transmission component is equipped with a solenoid valve.

8. The liquid-cooled charging host as described in claim 6, characterized in that, The main body of the charging host is also equipped with a control module; The control module is used to control the water pump, the main cooling fan, the first cooling fan, the second cooling fan, and the main cooling fan according to the internal ambient temperature.

9. The liquid-cooled charging host as described in any one of claims 1 to 8, characterized in that, The outer casing of the main body of the charging host includes at least one sheet metal shell corresponding to the installation area of ​​the copper busbar. The main body of the charging host is also equipped with a turbulence fan. The axial cross section of the sheet metal shell is curved. The turbulence fan is used in conjunction with the sheet metal housing to drive the internal airflow.

10. A power supply system, characterized in that, It includes a power supply and a liquid-cooled charging host as described in any one of claims 1 to 9, wherein the power supply is electrically connected to the liquid-cooled charging host, and the liquid-cooled charging host is used to transmit the power supply voltage to an external charging device.

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