A cooling liquid circulating system for a charging pile and a charging pile system

Abstract

This disclosure relates to a coolant circulation system for a charging pile and a charging pile system. The coolant circulation system includes a main inlet pipe, a main return pipe, a first module pipeline, and a heat exchanger. The first module pipeline includes a first inlet pipe, a return pipe, a plurality of first cooling pipes, and a first gun cooling pipe. The first inlet pipe has a first inlet and a first outlet. The first inlet is connected to the main inlet pipe. The return pipe is connected to the main return pipe. Each first cooling pipe corresponds one-to-one with each power module in a first group of power modules. The inlet end of each first cooling pipe is sequentially connected between the first inlet and the first outlet of the first inlet pipe. The outlet end of each first cooling pipe is sequentially connected to the return pipe. The first gun cooling pipe is connected between the first outlet and the main return pipe. A heat exchanger is disposed between the main return pipe and the main inlet pipe to form a closed loop. The heat exchanger is configured to cool the coolant.

Description

Technical Field

[0001] This disclosure relates to the field of charging technology, and in particular to a coolant circulation system for a charging pile and a charging pile system. Background Technology

[0002] This section is intended to provide background or context for the embodiments of this application described herein. The description herein is not intended to be a prior art simply because it is included in this section.

[0003] With the widespread adoption of high-voltage platforms for new energy vehicles and the rapid development of high-power supercharging technology, the charging power of charging piles continues to rise, placing higher demands on system heat dissipation capabilities. Although traditional air-cooling solutions are widely used, they have inherent drawbacks such as low heat exchange efficiency, insufficient heat dissipation density, high noise, and bulky charging cables, making it difficult to meet the temperature control requirements of high-power charging scenarios.

[0004] To compensate for the shortcomings of air-cooled heat dissipation solutions, liquid cooling has gradually become the mainstream technology for high-power charging piles. However, some liquid cooling solutions still face problems such as unreasonable circuit design and lack of interconnection between the power module and the corresponding pipeline of the charging gun, making it difficult to achieve coordinated thermal management of the system. This makes it difficult for the charging pile system to continuously output stable full power, which not only affects the user charging experience but also shortens the service life of the equipment. Summary of the Invention

[0005] It should be understood that the general description above and the detailed description below are exemplary and illustrative, and are intended to provide further explanation of the present disclosure as described in the claims.

[0006] This disclosure is provided to optimize liquid cooling circuit design, improve liquid cooling efficiency, and enhance the charging experience.

[0007] According to a first aspect of this disclosure, a coolant circulation system for a charging pile is provided. The coolant circulation system includes a main inlet pipe, a main return pipe, a first module pipeline, and a heat exchanger. The first module pipeline corresponds to cooling a first charging component. The first charging component includes a first group of power modules and a first charging gun. The first module pipeline includes a first inlet pipe, a return pipe, a plurality of first cooling pipes, and a first gun cooling pipe. The first inlet pipe has a first inlet and a first outlet. The first inlet is connected to the main inlet pipe. The return pipe is connected to the main return pipe. Each of the plurality of first cooling pipes corresponds one-to-one with each power module in the first group of power modules. The inlet end of each first cooling pipe is sequentially connected between the first inlet and the first outlet of the first inlet pipe. The outlet end of each first cooling pipe is sequentially connected to the return pipe. The first gun cooling pipe is connected between the first outlet and the main return pipe. The first gun cooling pipe corresponds to the first charging gun. A heat exchanger is disposed between the main return pipe and the main inlet pipe to form a closed-loop circuit. The heat exchanger is configured to cool the coolant.

[0008] The coolant circulation system disclosed herein integrates two coolant circulation loops by connecting the inlet end of the charging gun's corresponding gun cooling pipe to the inlet pipe of the power module and the outlet end to the main return pipe. This disclosure significantly reduces the number of hardware components used in the liquid cooling system, lowers the system hardware cost, and effectively simplifies the complexity of system installation, debugging, and subsequent maintenance, thus facilitating integrated and coordinated thermal management of the power module and charging gun.

[0009] Optionally, the coolant flow path for each power module in the first group of power modules sequentially includes: a main inlet pipe, at least a portion of a first inlet pipe, a first cooling pipe, at least a portion of a return pipe, and a main return pipe. The flow paths for each power module in the first group of power modules have substantially the same length.

[0010] This disclosure optimizes the topology of the cooling pipes to ensure that the flow path length of the coolant for different power modules is essentially the same. Under the physical constraint of a specified pipe diameter, it fundamentally solves the problem of flow distribution imbalance, significantly improves the rationality and stability of coolant flow distribution, achieves uniform heat dissipation for multiple power modules, avoids power attenuation caused by excessive local temperature rise, significantly improves the overall working stability of the charging pile system, significantly improves the charging experience, and extends the service life of the equipment.

[0011] Optionally, the first module piping further includes a first flow control valve and a second flow control valve. The first flow control valve is located at the first end of the first cooling pipe that connects to the first liquid outlet. The second flow control valve is located at the first end of the first liquid inlet pipe near the first liquid inlet.

[0012] Optionally, the coolant circulation system also includes a valve control unit. The valve control unit is configured to control a first flow control valve and a second flow control valve to regulate the coolant flow rate in the first cooling pipe and the first inlet pipe, respectively.

[0013] This disclosure allows for the control of coolant flow distribution across various pipelines by treating the entire charging assembly as the primary control object, eliminating the need to individually control the coolant flow of each power module and each charging gun. This design significantly reduces the number of required flow control valves, lowers hardware costs, and greatly simplifies the control logic for coolant flow distribution.

[0014] Optionally, the coolant circulation system further includes a second module piping. The second module piping corresponds to cooling the second charging assembly. The second charging assembly includes a second set of power modules and a second charging gun. The second module piping includes a second inlet pipe, multiple second cooling pipes, and a second gun cooling pipe. The second inlet pipe has a second inlet and a second outlet. The second inlet is connected to the main inlet pipe. Each of the multiple second cooling pipes corresponds one-to-one with each power module in the second set of power modules. The inlet end of each second cooling pipe is sequentially connected between the second inlet and the second outlet of the second inlet pipe. The outlet end of each second cooling pipe is sequentially connected to the return pipe. The second gun cooling pipe is connected between the second outlet and the main return pipe. The second gun cooling pipe corresponds to the second charging gun.

[0015] This disclosure divides multiple power modules in a charging pile system into several groups, with each group of power modules connected to a corresponding charging gun. A module pipeline is configured for each power module group and charging gun, thus establishing a unique binding relationship between the charging gun and the power module group. This design achieves a precise correspondence between the liquid cooling heat dissipation branch and the charging output branch, ensuring real-time matching of heat dissipation requirements with the power load of the charging output, effectively avoiding the ineffective allocation of heat dissipation resources. Furthermore, the coolant circulation system of this disclosure has good scalability. In application scenarios with a large number of charging branches, multiple module pipelines can be flexibly added, thereby achieving efficient and standardized expansion of the multi-branch heat dissipation topology.

[0016] Optionally, a first liquid pump is provided in the main inlet pipe. The first liquid pump is configured to drive the flow of coolant.

[0017] Optionally, the coolant circulation system further includes a first temperature sensor and a first coolant pump control unit. The first temperature sensor is configured to detect the temperature of the first coolant in the main return pipe. The first coolant pump control unit is configured to control the power of the first coolant pump based on the first coolant temperature.

[0018] Optionally, the coolant circulation system also includes a first temperature sensor and a heat exchanger control unit. The first temperature sensor is configured to detect the first coolant temperature in the main return pipe. The heat exchanger control unit is configured to control the heat dissipation power of the heat exchanger based on the first coolant temperature.

[0019] Optionally, the coolant circulation system also includes a gun line return pipe. The gun line return pipe connects the first gun cooling pipe and the main return pipe. The gun line return pipe is equipped with a second liquid pump.

[0020] Optionally, the coolant circulation system further includes a second temperature sensor and a second coolant pump control unit. The second temperature sensor is configured to detect the temperature of the second coolant in the gun wire return line. The second coolant pump control unit is configured to control the power of the second coolant pump based on the second coolant temperature.

[0021] According to a second aspect of this disclosure, a charging pile system is provided. The charging pile system includes a first charging component and the aforementioned coolant circulation system. The first charging component includes a first group of power modules and a first charging gun. Each of the plurality of first cooling pipes in the coolant circulation system is correspondingly disposed within each power module of the first group of power modules to dissipate heat from each power module. A first charging gun cooling pipe is disposed within the first charging gun to dissipate heat from the first charging gun.

[0022] According to a third aspect of this disclosure, a charging pile system is provided. The charging pile system includes multiple charging components and the aforementioned coolant circulation system. The multiple charging components include at least a first charging component and a second charging component. The first charging component includes a first set of power modules and a first charging gun. The second charging component includes a second set of power modules and a second charging gun. Each of the multiple first cooling pipes in the coolant circulation system is correspondingly disposed within each power module of the first set of power modules to dissipate heat from each power module. A first charging gun cooling pipe is disposed within the first charging gun to dissipate heat from the first charging gun. Each of the multiple second cooling pipes in the coolant circulation system is correspondingly disposed within each power module of the second set of power modules to dissipate heat from each power module. A second charging gun cooling pipe is disposed within the second charging gun to dissipate heat from the second charging gun. Attached Figure Description

[0023] A better understanding of the various aspects of this disclosure can be achieved by reading the following detailed description and referring to the accompanying drawings, in which: Figure 1 This is a schematic diagram illustrating a charging pile system 1000 according to some embodiments of the present disclosure.

[0024] Figure 2 To show Figure 1 A schematic diagram showing that the flow paths of the coolant corresponding to different power modules in the 1000 charging pile system are basically the same length.

[0025] Figure 3 This is a schematic diagram illustrating an exemplary charging pile system 3000.

[0026] Figure 4 To show Figure 3 A schematic diagram of the flow path of the coolant corresponding to different power modules in an exemplary charging pile system 3000.

[0027] Figure 5 A schematic diagram is provided to illustrate a charging pile system 5000 according to other embodiments of the present disclosure.

[0028] Figure 6 A schematic diagram is provided to illustrate a charging pile system 6000 according to other embodiments of the present disclosure.

[0029] In the accompanying drawings, similar components and / or features may have the same numerical reference numerals. Furthermore, components of the same type may be distinguished by a letter following the reference numeral, which can differentiate between similar components and / or features. If only the first numerical reference numeral is used in the specification, the description applies to any similar component and / or feature having the same first numerical reference numeral, regardless of the letter subscript. Detailed Implementation

[0030] The following describes specific embodiments of this disclosure. It should be noted that, in order to maintain brevity, this specification cannot provide a detailed description of all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, just as in any engineering or design project, various specific decisions are often made to achieve the developer's specific goals and to meet system-related or business-related constraints, and this can change from one embodiment to another. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content of this disclosure, changes in design, manufacturing, or production based on the technical content disclosed herein are merely conventional technical means and should not be construed as insufficient content of this disclosure.

[0031] References to "some embodiments," "embodiments," "example embodiments," etc., in the specification indicate that the described embodiments may include specific features, structures, or characteristics; however, not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in connection with an embodiment, it is believed that the influence of such feature, structure, or characteristic on such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge of those skilled in the art.

[0032] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. Words such as “comprising” or “including” mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects.

[0033] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects. For example, "A and / or B" means (A), (B) or (A and B), and "A, B, and / or C" means (A), (B), (C), (A and B), (A and C), (B and C) or (A, B and C). The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] Figure 1 This is a schematic diagram illustrating a charging pile system 1000 according to some embodiments of the present disclosure. The charging pile system 1000 of the present disclosure may include a first charging component 1100 and a coolant circulation system 1200.

[0035] The first charging component 1100 may include a first group of power modules 1110 and a first charging gun 1120. As an example, the first group of power modules 1110 may include power module 1-1, power module 1-2, power module 1-3, and power module 1-4. The input terminal of the first charging gun 1120 is electrically connected to the output terminals of power modules 1-1, 1-2, 1-3, and 1-4. When a load is connected to the output terminal of the first charging gun 1120, the load can access all the power resources in the first group of power modules 1110 through the first charging gun 1120.

[0036] The coolant circulation system 1200 may include a main inlet pipe 1210, a main return pipe 1220, a first module pipe 1300, and a heat exchanger 1230.

[0037] The first module piping 1300 corresponds to cooling the first charging component 1100. The first module piping 1300 may include a first liquid inlet pipe 1310, a liquid return pipe 1320, multiple first cooling pipes 1330, and a first cooling gun pipe 1340. The first liquid inlet pipe 1310 has a first liquid inlet 1311 and a first liquid outlet 1312. The first liquid inlet 1311 is connected to the main liquid inlet pipe 1210. The liquid return pipe 1320 is connected to the main liquid return pipe 1220.

[0038] Each of the plurality of first cooling pipes 1330 can correspond one-to-one with each power module in the first group of power modules 1110. Specifically, each of the plurality of first cooling pipes 1330 can be disposed one-to-one within each power module in the first group of power modules 1110 to dissipate heat from each power module in the first group of power modules 1110. As an example, first cooling pipe 1331 can be disposed within power module 1-1, first cooling pipe 1332 can be disposed within power module 1-2, first cooling pipe 1333 can be disposed within power module 1-3, and first cooling pipe 1334 can be disposed within power module 1-4 to dissipate heat from power modules 1-1, 1-2, 1-3, and 1-4 respectively.

[0039] The inlet end of each of the plurality of first cooling pipes 1330 is sequentially connected between the first inlet port 1311 and the first outlet port 1312 of the first inlet pipe 1310. The outlet end of each of the plurality of first cooling pipes 1330 is sequentially connected to the return pipe 1320. As an example, the inlet ends of the first cooling pipes 1331, 1332, 1333, and 1334 are sequentially connected between the first inlet port 1311 and the first outlet port 1312 of the first inlet pipe 1310. The outlet ends of the first cooling pipes 1331, 1332, 1333, and 1334 are sequentially connected to the return pipe 1320.

[0040] The first cooling pipe 1340 is connected between the first liquid outlet 1312 and the main return pipe 1220. The first cooling pipe 1340 corresponds to the first charging gun 1120. Specifically, the first cooling pipe 1340 can be disposed inside the first charging gun 1120 to dissipate heat from the first charging gun 1120.

[0041] The heat exchanger 1230 can be disposed between the main return pipe 1220 and the main inlet pipe 1210 to form a closed loop. The heat exchanger 1230 can be configured to cool the coolant.

[0042] Because the power module and charging gun have different requirements for coolant flow and pressure, exemplary charging pile systems typically have two independent coolant circulation loops for the power module and charging gun, respectively. This allows the coolant in the gun-cooling pipe corresponding to the charging gun to circulate independently without connecting to the main inlet and return pipes. This design not only increases the hardware cost of the liquid cooling system but also significantly increases the complexity of installation, commissioning, and subsequent maintenance. The coolant circulation system disclosed herein integrates the two coolant circulation loops by connecting the inlet end of the charging gun's corresponding gun-cooling pipe to the inlet pipe corresponding to the power module and the outlet end to the main return pipe. This disclosure significantly reduces the number of hardware components used in the liquid cooling system, lowers the system hardware cost, and effectively simplifies the complexity of system installation, commissioning, and subsequent maintenance, facilitating integrated and coordinated thermal management of the power module and charging gun.

[0043] In some embodiments, the coolant flow path for each power module in the first group of power modules 1110 may sequentially include: a main inlet pipe 1210, at least a portion of a first inlet pipe 1310, a first cooling pipe, at least a portion of a return pipe 1320, and a main return pipe 1220. After reaching the main return pipe 1220, the coolant enters the heat exchanger 1230 from the main return pipe 1220. The heat exchanger 1230 outputs the cooled coolant back to the main inlet pipe 1210, thereby forming a closed-loop coolant flow path.

[0044] In some embodiments, the coolant flow path corresponding to each power module in the first group of power modules 1110 may have substantially the same length. In this application, "substantially the same data" means that the standard deviation of the multiple data points does not exceed 5% of the average. For example, "substantially the same length of multiple flow paths" means that the standard deviation of the set of length data for the multiple flow paths does not exceed 5% of the average of that set.

[0045] Figure 2 To show Figure 1 A schematic diagram showing that the flow paths of the coolant corresponding to different power modules in the 1000 charging pile system are basically the same length.

[0046] Since the flow paths corresponding to different power modules share the same main inlet pipe 1210 and main return pipe 1220, the length difference of the flow paths corresponding to different power modules is reflected in the characteristic segment composed of "at least a part of the first inlet pipe 1310, the first cooling pipe, and at least a part of the return pipe 1320". That is, the fact that the flow paths corresponding to each power module have substantially the same length can be converted into the fact that the aforementioned characteristic segments have substantially the same length.

[0047] As an example, refer to Figure 2The characteristic segment 210 of the coolant flow path corresponding to power module 1-1 is "the first part 211 of the first inlet pipe 1310, the first cooling pipe 1331, and the entirety of the return pipe 1320". The characteristic segment 220 of the coolant flow path corresponding to power module 1-2 is "the second part 221 of the first inlet pipe 1310, the first cooling pipe 1332, and the first part 222 of the return pipe 1320". The characteristic segment 230 of the coolant flow path corresponding to power module 1-3 is "the third part 231 of the first inlet pipe 1310, the first cooling pipe 1333, and the second part 232 of the return pipe 1320". The characteristic segment 240 of the coolant flow path corresponding to power module 1-4 is "the entirety of the first inlet pipe 1310, the first cooling pipe 1334, and the third part 242 of the return pipe 1320".

[0048] In some embodiments, the lengths of the plurality of first cooling pipes 1330 may be substantially the same. As an example, the lengths of the first cooling pipes 1331, 1332, 1333, and 1334 may be substantially the same. In this case, the fact that the characteristic sections have substantially the same length can be translated into the sum L(sum) of the length L(A) of the coolant passing through at least a portion of the first inlet pipe 1310 and the length L(B) of the coolant passing through at least a portion of the return pipe 1320.

[0049] By comparing the composition of feature segments 210, 220, 230, and 240, it can be seen that this disclosure achieves that the total length L(A) of at least a portion of the coolant corresponding to different power modules passing through the first inlet pipe 1310 is substantially the same as the total length L(sum) of at least a portion of the coolant passing through the return pipe 1320 and the length L(B) passing through the return pipe 1320, by positioning the outlet of the return pipe 1320 for connecting to the main return pipe 1220 at an end far from the main inlet pipe 1210.

[0050] For example, for characteristic segment 210, let the length of the first part 211 of the first inlet pipe 1310 be denoted as L(A1), and the total length of the return pipe 1320 be denoted as L(B1). Then, the total length of characteristic segment 210 is L(sum1) = L(A1) + L(B1). For characteristic segment 220, let the length of the second part 221 of the first inlet pipe 1310 be denoted as L(A2), and the difference between L(A2) and L(A1) be denoted as D. Then, L(A2) can be expressed as L(A2) = L(A1) + D; let the length of the first part 222 of the return pipe 1320 be denoted as L(B2). Figure 2It is evident that the difference between L(B2) and L(B1) is also D. Therefore, L(B2) can be expressed as L(B2) = L(B1) - D. The total length L(sum2) corresponds to feature segment 220.

[0051] =L(A2)+L(B2)

[0052] =L(A1)+D+L(B1)-D

[0053] =L(A1)+L(B1)

[0054] =L(sum1).

[0055] It can be seen that the total length L(sum2) corresponding to feature segment 220 is basically the same as the total length L(sum1) corresponding to feature segment 210. By analogy, the total lengths corresponding to feature segments 230 and 240 are also basically the same as the total length L(sum1) corresponding to feature segment 210.

[0056] Figure 3 This is a schematic diagram illustrating an exemplary charging pile system 3000. Figure 4 To show Figure 3 A schematic diagram of the flow path of the coolant corresponding to different power modules in an exemplary charging pile system 3000. Figure 3 Some technical details of the exemplary charging pile system 3000 shown are similar to those of the charging pile system 1000 disclosed herein, and will not be repeated here. The following description, in conjunction with... Figure 3 and Figure 4 The flow paths of the coolant corresponding to different power modules in the exemplary charging pile system 3000 are described in order to highlight the beneficial effect of the charging pile system according to some embodiments of the present disclosure, which makes the flow paths of the coolant corresponding to different power modules substantially the same length.

[0057] like Figure 4 As shown, in the exemplary charging pile system 3000, the coolant flow path length is shorter for the power module closer to the main inlet pipe 1210, and longer for the power module farther from the main inlet pipe 1210. For example, the coolant flow paths for power modules 1, 2, 3, and 4 in the exemplary charging pile system 3000 are flow path 410, flow path 420, flow path 430, and flow path 440, respectively.

[0058] contrast Figure 2 and Figure 4 visible, Figure 2The flow paths 210, 220, 230, and 240 are approximately "Z-shaped," and this Z-shaped topology ensures that the lengths of the different flow paths are essentially the same. Figure 4 The flow paths 410, 420, 430 and 440 are shaped like a "U", and this U-shaped topology causes the lengths of the four flow paths to increase sequentially.

[0059] exist Figure 4 In this process, the varying lengths of the flow paths cause uneven coolant flow distribution. Specifically, Figure 4 The power modules closer to the main inlet pipe 1210 receive a larger coolant flow, while those farther away receive a smaller flow, resulting in an uneven distribution of coolant flow among the different power modules. This uneven distribution leads to uneven heat dissipation efficiency among the power modules, which in turn results in uneven temperature distribution, severely impacting the overall system stability and lifespan.

[0060] Through simulation and experimentation, the applicant discovered that, under the condition that the cooling pipe diameter is the same (e.g., 15mm), to achieve a balanced flow distribution in the cooling pipes corresponding to different power modules, Figure 4 The U-shaped topology shown requires extremely low pressure loss within the cooling pipes, while the Z-shaped topology of this disclosure allows for a significantly relaxed pressure loss requirement. This means that the Z-shaped topology of this disclosure can achieve flow uniformity under more relaxed design parameter requirements. By optimizing the cooling pipe topology, this disclosure ensures that the flow path lengths of the coolant corresponding to different power modules are essentially the same. Under the physical constraint of a specified pipe diameter, it fundamentally solves the problem of flow distribution imbalance, significantly improving the rationality and stability of coolant flow distribution. This achieves uniform heat dissipation for multiple power modules, avoids power attenuation caused by excessive local temperature rise, significantly improves the overall operational stability of the charging pile system, significantly improves the charging experience, and extends the equipment's lifespan.

[0061] Figure 5 A schematic diagram of a charging pile system 5000 according to other embodiments of the present disclosure is provided. Some technical details of the charging pile system 5000 are similar to those of the charging pile system 1000, and will not be repeated here.

[0062] In some embodiments, the charging pile system 5000 may further include multiple charging components. These multiple charging components may include at least a first charging component 1100 and a second charging component 5100. The second charging component 5100 may include a second set of power modules 5110 and a second charging gun 5120. As an example, the second set of power modules 5110 may include power module 2-1, power module 2-2, power module 2-3, and power module 2-4. The input terminal of the second charging gun 5120 is electrically connected to the output terminals of power modules 2-1, 2-2, 2-3, and 2-4. When a load is connected to the output terminal of the second charging gun 5120, the load can access all the power supply resources in the second set of power modules 5110 through the second charging gun 5120.

[0063] In some embodiments, the coolant circulation system 1200 of the charging pile system 5000 may further include a second module pipeline 5200. The second module pipeline 5200 is used to cool the second charging component 5100.

[0064] The second module piping 5200 may include a second liquid inlet pipe 5210, multiple second cooling pipes 5220, and a second gun cooling pipe 5230. The second liquid inlet pipe 5210 has a second liquid inlet 5211 and a second liquid outlet 5212. The second liquid inlet 5211 is connected to the main liquid inlet pipe 1210. As an example, a T-fitting fitting can be used to connect both the first liquid inlet 1311 and the second liquid inlet 5211 to the main liquid inlet pipe 1210 simultaneously. In this case, the main liquid inlet pipe 1210 is connected to the input end of the T-fitting fitting, and the first liquid inlet 1311 and the second liquid inlet 5211 are respectively connected to the two output ends of the T-fitting fitting.

[0065] Each of the plurality of second cooling pipes 5220 corresponds one-to-one with each power module in the second group of power modules 5110. Specifically, each of the plurality of second cooling pipes 5220 is disposed one-to-one within each power module in the second group of power modules 5110 to dissipate heat from each power module in the second group of power modules 5110. As an example, second cooling pipe 5221 may be disposed within power module 2-1, second cooling pipe 5222 may be disposed within power module 2-2, second cooling pipe 5223 may be disposed within power module 2-3, and second cooling pipe 5224 may be disposed within power module 2-4 to dissipate heat from power modules 2-1, 2-2, 2-3, and 2-4, respectively.

[0066] The inlet end of each of the plurality of second cooling pipes 5220 is sequentially connected between the second inlet port 5211 and the second outlet port 5212 of the second inlet pipe 5210. The outlet end of each of the plurality of second cooling pipes 5220 is sequentially connected to the return pipe 1320. As an example, the outlet ends of the second cooling pipes 5221, 5222, 5223 and 5224 are sequentially connected to the return pipe 1320.

[0067] The second cooling pipe 5230 is connected between the second liquid outlet 5212 and the main return pipe 1220. The second cooling pipe 5230 corresponds to the second charging gun 5120. Specifically, the second cooling pipe 5230 is disposed inside the second charging gun 5120 to dissipate heat from the second charging gun 5120.

[0068] It should be noted that, although Figure 5 Only the first charging component 1100 and the second charging component 5100 among multiple charging components are shown. However, those skilled in the art will understand that the number of multiple charging components in a charging pile system is not limited to two. For example, in some embodiments, the charging pile system may include N (N>2) charging components, and its coolant circulation system may correspondingly include N module pipes. The N module pipes each cool the N charging components. Each of the N module pipes includes an inlet pipe, multiple cooling pipes, and a gun cooling pipe, and the N module pipes share the same return pipe. The connection method between the shared return pipe and the inlet pipe, multiple cooling pipes, and gun cooling pipe of each module pipe can be the same as... Figure 5 The second module piping shown is similar and will not be described in detail here.

[0069] This disclosure divides multiple power modules in a charging pile system into several groups, with each group of power modules connected to a corresponding charging gun. A module pipeline is configured for each power module group and charging gun, thus establishing a unique binding relationship between the charging gun and the power module group. This design achieves a precise correspondence between the liquid cooling heat dissipation branch and the charging output branch, ensuring real-time matching of heat dissipation requirements with the power load of the charging output, effectively avoiding the ineffective allocation of heat dissipation resources. Furthermore, the coolant circulation system of this disclosure has good scalability. In application scenarios with a large number of charging branches, multiple module pipelines can be flexibly added, thereby achieving efficient and standardized expansion of the multi-branch heat dissipation topology.

[0070] In some embodiments, the coolant circulation system 1200 may further include a gun line return pipe 5300. The gun line return pipe 5300 is connected between the first gun cooling pipe 1340 and the main return pipe 1220. As an example, Figure 5The first gun cooling pipe 1340 and the second gun cooling pipe 5230 are both connected to the main return pipe 1220 through the gun line return pipe 5300.

[0071] Figure 6 A schematic diagram of a charging pile system 6000 according to other embodiments of the present disclosure is provided. Some technical details of the charging pile system 6000 are similar to those of the charging pile system 5000, and will not be repeated here.

[0072] In some embodiments, the first module pipeline 1300 may further include a first flow control valve 611 and a second flow control valve 612. The first flow control valve 611 is disposed at the first end of the first cooling pipe 1340 that connects to the first liquid outlet 1312. The second flow control valve 612 is disposed at the first end of the first liquid inlet pipe 1310 near the first liquid inlet 1311.

[0073] In some embodiments, the second module pipeline 5200 may further include a third flow control valve 621 and a fourth flow control valve 622. The third flow control valve 621 is disposed at the first end of the second cooling pipe 5230 that connects to the second liquid outlet 5212. The fourth flow control valve 622 is disposed at the first end of the second liquid inlet pipe 5210 near the second liquid inlet 5211.

[0074] In some embodiments, the coolant circulation system 6000 may further include a valve control unit 630. The valve control unit 630 is configured to control a first flow control valve 611 and a second flow control valve 612 to regulate the coolant flow rates in the first coolant pipe 1340 and the first inlet pipe 1310, respectively.

[0075] In some embodiments, the valve control unit 630 is further configured to control the third flow control valve 621 and the fourth flow control valve 622 to adjust the flow rates of coolant in the second gun cooling pipe 5230 and the second liquid inlet pipe 5210, respectively.

[0076] In the exemplary coolant circulation system, each power module and each charging gun has its own independent flow control valve for its corresponding liquid cooling pipeline. For example, Figure 6 The eight power modules and two charging guns shown theoretically require ten flow control valves in the exemplary coolant circulation system. This not only results in a large number of valves and high hardware costs, but also necessitates that the valve control unit run complex flow control logic to coordinate the numerous valves.

[0077] This disclosure binds a group of power modules and a charging gun into a single charging assembly. In practical charging scenarios, the operating states of multiple power modules and charging guns within the same charging assembly are linked, and their cooling and heat dissipation requirements are also interconnected. Therefore, this disclosure can control the coolant flow distribution in each pipeline by using the entire charging assembly as the basic control object, without needing to control the coolant flow of each power module and each charging gun individually. This design significantly reduces the number of required flow control valves, lowers hardware costs, and greatly simplifies the control logic for coolant flow distribution.

[0078] As an example, when the load is connected only to the first charging gun 1120, the first charging gun 1120 and the first power module 1110 are in operation. At this time, the valve control unit 630 can control the first flow control valve 611 and the second flow control valve 612 to open, so as to provide precise heat dissipation for the first charging gun 1120 and the first power module 1110. When the load is connected only to the second charging gun 5120, the second charging gun 5120 and the second power module 5110 are in operation. At this time, the valve control unit 630 can control the third flow control valve 621 and the fourth flow control valve 622 to open, so as to provide precise heat dissipation for the second charging gun 5120 and the second power module 5110.

[0079] When the load is connected to the first charging gun 1120 and the second charging gun 5120 at the same time, the first charging gun 1120, the first power module 1110, the second charging gun 5120 and the second power module 5110 are all in working state. At this time, the valve control unit 630 can control the first flow control valve 611, the second flow control valve 612, the third flow control valve 621 and the fourth flow control valve 622 to open simultaneously, so as to achieve synchronous heat dissipation of dual-path charging.

[0080] When the load is not connected to the first charging gun 1120 and the second charging gun 5120, the first charging gun 1120, the first power module 1110, the second charging gun 5120 and the second power module 5110 are all in a shutdown state. At this time, the valve control unit 630 can control the first flow control valve 611, the second flow control valve 612, the third flow control valve 621 and the fourth flow control valve 622 to close simultaneously, so as to avoid ineffective heat dissipation without charging branch and reduce the energy consumption of liquid cooling system.

[0081] It should be noted that, although Figure 6 Only four flow control valves are shown, but those skilled in the art will understand that the number of flow control valves is not limited to four. For example, in some embodiments, the charging pile system may include N (N>2) charging components, then the N charging components may correspond to 2×N flow control valves, where each charging component corresponds to two flow control valves. The positions of the 2×N flow control valves can be... Figure 6The first flow control valve 611, the second flow control valve 612, the third flow control valve 621, and the fourth flow control valve 622 shown are similar and will not be described again here.

[0082] In some embodiments, a first liquid pump 640 may be provided in the main liquid inlet pipe 1210. The first liquid pump 640 is configured to drive the flow of coolant.

[0083] In some embodiments, the coolant circulation system 1200 may further include a first temperature sensor 641 and a first coolant pump control unit 642. The first temperature sensor 641 is configured to detect a first coolant temperature in the main return pipe 1220. The first coolant pump control unit 642 is configured to control the power of the first coolant pump 640 based on the first coolant temperature.

[0084] As an example, controlling the power of the first coolant pump 640 based on the first coolant temperature may include: reducing the power of the first coolant pump 640 when the first coolant temperature is low, and increasing the power of the first coolant pump 640 when the first coolant temperature is high. A lower first coolant temperature indicates lower heat dissipation demand, and reducing the power of the first coolant pump 640 at this time can reduce power consumption. A higher first coolant temperature indicates higher heat dissipation demand, and increasing the power of the first coolant pump 640 at this time can improve heat dissipation efficiency. In addition, the power of the first coolant pump 640 can also be adjusted in real time according to the actual charging load of the system and the external ambient temperature to achieve rapid warming of the coolant in low-temperature environments, achieving energy saving and quiet operation, and effectively extending the service life of the first coolant pump 640.

[0085] In some embodiments, the coolant circulation system 1200 may further include a heat exchanger control unit 650. The heat exchanger control unit 650 is configured to control the heat dissipation power of the heat exchanger 1230 based on the first coolant temperature. As an example, Figure 6 The heat exchanger 1230 is equipped with a heat exchanger fan 1231, and the heat exchanger control unit 650 can control the heat dissipation power of the heat exchanger 1230 by controlling the power of the heat exchanger fan 1231.

[0086] As an example, controlling the heat dissipation power of heat exchanger 1230 based on the first coolant temperature may include: reducing the heat dissipation power of heat exchanger 1230 when the first coolant temperature is low, and increasing the heat dissipation power of heat exchanger 1230 when the first coolant temperature is high. Furthermore, the heat dissipation power of heat exchanger 1230 can also be adjusted secondaryly according to the actual system load and external ambient temperature to achieve rapid temperature rise of the coolant in low-temperature environments, while also considering energy saving, quiet operation, and extending the service life of heat exchanger 1230.

[0087] In some embodiments, the coolant circulation system 1200 may further include a pressure sensor 660. The pressure sensor 660 is configured to detect the coolant pressure in the main inlet pipe 1210. The heat exchanger control unit 650 is further configured to control the heat dissipation power of the heat exchanger 1230 based on the coolant pressure. The first liquid pump control unit 642 is further configured to control the power of the first liquid pump 640 based on the coolant pressure.

[0088] In some embodiments, the gun wire return line 5300 may be provided with a second liquid pump 670.

[0089] In some embodiments, the coolant circulation system 1200 may further include a second temperature sensor 671 and a second coolant pump control unit 672. The second temperature sensor 671 is configured to detect the temperature of the second coolant in the gun wire return line 5300. The second coolant pump control unit 672 is configured to control the power of the second coolant pump 670 based on the second coolant temperature.

[0090] As an example, controlling the power of the second liquid pump 670 based on the second coolant temperature may include: reducing the power of the second liquid pump 670 when the second coolant temperature is low, and increasing the power of the second liquid pump 670 when the second coolant temperature is high. This design avoids the problem of excessive system pressure caused by high flow rate during low-temperature start-up, while reducing the power consumption of the second liquid pump 670 under normal and low-temperature operating conditions, achieving energy-saving and quiet operation, and effectively extending the service life of the second liquid pump 670.

[0091] In some embodiments, the coolant circulation system 1200 may further include an expansion tank 680 with its outlet connected to the main return pipe 1220. The expansion tank 680 is configured to store coolant. The expansion tank 680 can serve as a system replenishment, pressure regulation, and coolant storage device to maintain pressure stability within the cooling system and replenish coolant losses.

[0092] In some embodiments, the coolant circulation system 6000 may further include a filter 690 disposed in the main inlet pipe 1210. The filter 690 is configured to filter impurities in the coolant. The filter 690 serves as an impurity filtration device for the cooling circulation, filtering out minute impurities in the coolant, preventing blockage of the cooling pipes, and protecting the pump body while extending the pump's service life.

[0093] In some embodiments, the main inlet pipe 1210 and the main return pipe 1220 can be rigid pipes. As an example, the rigid pipes can be made of metal to ensure the strength and sealing performance of the pipeline structure.

[0094] In some embodiments, the plurality of first cooling pipes 1330 and the plurality of second cooling pipes 5220 may be flexible hoses. Flexible hoses have excellent elastic deformation capabilities, which can reduce the impact of system pressure fluctuations on the power module.

[0095] The coolant circulation system disclosed herein integrates two coolant circulation loops by connecting the inlet end of the charging gun's corresponding gun cooling pipe to the inlet pipe of the power module and the outlet end to the main return pipe. This disclosure significantly reduces the number of hardware components used in the liquid cooling system, lowers the system hardware cost, and effectively simplifies the complexity of system installation, debugging, and subsequent maintenance, thus facilitating integrated and coordinated thermal management of the power module and charging gun.

[0096] Furthermore, this disclosure optimizes the topology of the cooling pipes so that the flow path length of the coolant corresponding to different power modules is basically the same. Under the physical constraint of the specified pipe diameter, it fundamentally solves the problem of flow distribution imbalance, greatly improves the rationality and stability of coolant flow distribution, realizes uniform heat dissipation of multiple power modules, avoids power attenuation caused by excessive local temperature rise, significantly improves the overall working stability of the charging pile system, significantly improves the charging experience and extends the service life of the equipment.

[0097] While this disclosure has been described with reference to certain embodiments, those skilled in the art will understand that various changes and substitutions can be made without departing from the scope of this disclosure. Furthermore, many modifications can be made to adapt particular situations or materials to the teachings of this disclosure without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the specific embodiments disclosed, but rather to include all embodiments falling within the scope of the appended claims.

Claims

1. A coolant circulation system for a charging pile, comprising a main inlet pipe, a main return pipe, a first module pipeline, and a heat exchanger; The first module piping corresponds to cooling the first charging component, which includes a first set of power modules and a first charging gun. The first module piping includes: A first liquid inlet pipe, the first liquid inlet pipe having a first liquid inlet and a first liquid outlet, the first liquid inlet being connected to the main liquid inlet pipe; A return liquid pipeline, which is connected to the main return liquid pipeline; Multiple first cooling pipes, each of the multiple first cooling pipes corresponding one-to-one with each power module in the first group of power modules, the liquid inlet end of each first cooling pipe being sequentially connected between the first liquid inlet and the first liquid outlet of the first liquid inlet pipe, and the liquid outlet end of each first cooling pipe being sequentially connected to the return liquid pipe. The first gun cooling pipe is connected between the first liquid outlet and the main return pipe, and the first gun cooling pipe corresponds to the first charging gun. The heat exchanger is disposed between the main return pipe and the main inlet pipe to form a closed loop, and the heat exchanger is configured to cool the coolant.

2. The coolant circulation system according to claim 1, characterized in that, The flow path of the coolant corresponding to each power module in the first group of power modules includes, in sequence: the main inlet pipe, at least a portion of the first inlet pipe, the first cooling pipe, at least a portion of the return pipe, and the main return pipe. In this group of power modules, the flow path corresponding to each power module has substantially the same length.

3. The coolant circulation system according to claim 1, characterized in that, The first module pipeline also includes a first flow control valve and a second flow control valve. The first flow control valve is located at the first end of the first gun cooling pipeline that connects to the first liquid outlet, and the second flow control valve is located at the first end of the first liquid inlet pipeline that is close to the first liquid inlet.

4. The coolant circulation system according to claim 3, characterized in that, It also includes a valve control unit configured to control the first flow control valve and the second flow control valve to adjust the flow rate of coolant in the first gun cooling pipe and the first liquid inlet pipe, respectively.

5. The coolant circulation system according to claim 1, characterized in that, It also includes a second module pipeline, which corresponds to cooling the second charging component. The second charging component includes a second set of power modules and a second charging gun. The second module pipeline includes: The second liquid inlet pipe has a second liquid inlet and a second liquid outlet, and the second liquid inlet is connected to the main liquid inlet pipe. Multiple second cooling pipes, each of the multiple second cooling pipes corresponding one-to-one with each power module in the second group of power modules, the liquid inlet end of each second cooling pipe being sequentially connected between the second liquid inlet and the second liquid outlet of the second liquid inlet pipe, and the liquid outlet end of each second cooling pipe being sequentially connected to the return liquid pipe; The second cooling pipe is connected between the second liquid outlet and the main return pipe, and corresponds to the second charging gun.

6. The coolant circulation system according to claim 1, characterized in that, The main inlet pipe is equipped with a first liquid pump, which is configured to drive the flow of coolant.

7. The coolant circulation system according to claim 6, characterized in that, It also includes a first temperature sensor and a first liquid pump control unit, the first temperature sensor being configured to detect the temperature of a first coolant in the main return pipe, and the first liquid pump control unit being configured to control the power of the first liquid pump based on the first coolant temperature.

8. The coolant circulation system according to claim 1, characterized in that, It also includes a first temperature sensor and a heat exchanger control unit, wherein the first temperature sensor is configured to detect the temperature of a first coolant in the main return pipe, and the heat exchanger control unit is configured to control the heat dissipation power of the heat exchanger based on the first coolant temperature.

9. The coolant circulation system according to claim 1, characterized in that, It also includes a gun wire return pipe, which is connected between the first gun cooling pipe and the main return pipe, and the gun wire return pipe is equipped with a second liquid pump.

10. The coolant circulation system according to claim 9, characterized in that, It also includes a second temperature sensor and a second liquid pump control unit, the second temperature sensor being configured to detect the temperature of the second coolant in the gun wire return pipe, and the second liquid pump control unit being configured to control the power of the second liquid pump based on the temperature of the second coolant.

11. A charging pile system, comprising: A first charging component, the first charging component including a first set of power modules and a first charging gun; And the coolant circulation system according to any one of claims 1 to 10; In the cooling system, each of the plurality of first cooling pipes is correspondingly disposed within each power module of the first group of power modules to dissipate heat from each power module. The first gun cooling pipe is disposed within the first charging gun to dissipate heat from the first charging gun.

12. A charging pile system, comprising: Multiple charging components, the multiple charging components including at least a first charging component and a second charging component, the first charging component including a first set of power modules and a first charging gun, the second charging component including a second set of power modules and a second charging gun; And the coolant circulation system as described in claim 5; In the coolant circulation system, each of the plurality of first cooling pipes is correspondingly disposed in each of the first group of power modules to dissipate heat from each of the first group of power modules. The first gun cooling pipe is disposed in the first charging gun to dissipate heat from the first charging gun. Each of the plurality of second cooling pipes in the coolant circulation system is correspondingly disposed within each power module in the second group of power modules to dissipate heat from each power module in the second group of power modules. The second gun cooling pipe is disposed within the second charging gun to dissipate heat from the second charging gun.

Images