Cold plate liquid-cooled charging pile

Abstract

The application relates to the technical field of charging piles and discloses a cold-plate type liquid-cooled charging pile, which comprises a cabinet, a liquid storage tank, a liquid-cooled pump, a backboard type power module, a liquid-cooled pipeline, a liquid-cooled radiator, a variable-frequency fan and a fan opening. The application provides power for heat dissipation based on cooling liquid circulation, precisely absorbs heat by using the backboard type power module and the liquid-cooled pipeline, cooperatively works the liquid-cooled radiator and the variable-frequency fan to dissipate heat and ensure the benign circulation of the cooling liquid, detects and predicts power and controls the power unit to be connected to realize intelligent charging, discovers faults in time based on self-diagnosis of the variable-frequency fan to ensure the safe operation of equipment, optimizes the heat dissipation process by setting a one-way cooling liquid conveying path and a backflow temperature threshold, and thus effectively solves the heat dissipation problem of the charging pile as a whole, improves charging efficiency, reduces the equipment failure rate and prolongs the service life.

Description

Technical Field

[0001] This application relates to the field of charging pile technology, specifically a cold plate type liquid-cooled charging pile. Background Technology

[0002] In recent years, the electric vehicle market has experienced explosive growth, placing unprecedented demands on the performance of charging stations. Traditional air-cooled charging stations are showing increasingly significant drawbacks when dealing with high-power charging. High-power operation generates a large amount of heat in the charging station's power modules, and air cooling is inefficient at dissipating this heat quickly. This not only leads to a substantial reduction in charging efficiency but also accelerates component aging, greatly shortening the charging station's lifespan. Furthermore, the harsh noise generated by the high-speed operation of the fans severely disrupts the surrounding environment, limiting their use in noise-sensitive areas such as residential communities.

[0003] While some charging piles incorporating liquid cooling technology have alleviated heat dissipation issues to some extent, they have also created new problems. For example, Chinese patent CN118003931A discloses a liquid-cooled charging pile and its associated heat dissipation system. The complex shell-and-tube heat exchanger structure, although achieving heat exchange through two cooling cycles, suffers from structural limitations in heat exchange efficiency, making it difficult to meet the high-efficiency heat dissipation requirements of high-power charging. Furthermore, this invention does not address the flexible combination of power modules, making it unsuitable for adapting to the power requirements of different vehicle models and charging scenarios. In terms of maintenance, the numerous connecting components and complex structure increase maintenance difficulty and cost. These problems seriously hinder the development of charging pile technology.

[0004] In summary, there is an urgent need for a new type of cold-plate liquid-cooled charging pile to solve the above-mentioned technical problems and improve the overall performance of the charging pile. Summary of the Invention

[0005] The purpose of this application is to provide a cold plate type liquid-cooled charging pile to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this application discloses the following technical solution: a cold plate type liquid-cooled charging pile, including a cabinet, wherein the bottom area of ​​the cabinet is provided with a storage tank for storing coolant and a liquid-cooled pump for providing power for coolant circulation, the middle area of ​​the cabinet is provided with a back-panel power module, and liquid-cooled pipes are provided on both sides or one side of the back-panel power module for coolant circulation, and the top area of ​​the cabinet is provided with a heat dissipation module and a corresponding fan opening, wherein the heat dissipation module includes a liquid-cooled radiator and a variable frequency fan connected to a temperature sensor;

[0007] The backplate power module includes multiple power units, a power detection unit, and a backplate slot. The power units and the power detection unit are disposed on the backplate slot. When the backplate power module is running, the power detection unit detects the predicted power required by the charging vehicle and controls the connection of the power unit based on the predicted power.

[0008] When the liquid-cooled radiator is running, the variable frequency fan controls the fan speed based on the real-time temperature collected by the temperature sensor, and uses the variable frequency fan to dissipate heat from the coolant in the liquid-cooled radiator. The air generated by the heat dissipation is discharged upward through the fan opening. The variable frequency fan is equipped with a self-diagnostic unit for detecting whether there is a fault in the variable frequency fan.

[0009] When the cold-plate type liquid-cooled charging pile is in operation, the backplate type power module charges the charging vehicle. At the same time, the liquid-cooling pump operates, and the coolant in the storage tank is transported unidirectionally through the liquid-cooling pipeline. This unidirectional transport is as follows: the coolant is transported from the storage tank to the liquid-cooling radiator, and the liquid-cooling radiator operates to transport the cooled coolant back to the storage tank. When the temperature of the coolant meets the preset return temperature threshold, the cooled coolant is transported back to the storage tank.

[0010] Preferably, the front panel of the cabinet is equipped with a touch screen for interaction between the cold plate type liquid-cooled charging pile and the user.

[0011] Preferably, the power unit is provided with an independent plug-in interface. The power unit is connected using this plug-in interface. During connection and operation, the plug-in and plug-out time of the power unit is collected. When the plug-in and plug-out time is greater than a preset plug-in and plug-out time threshold, the power unit is determined to be abnormal and reported. The plug-in and plug-out time is based on the electrical connection time, which is the time to achieve electrical connection and complete self-test.

[0012] Preferably, the power detection unit identifies the vehicle type and power demand based on real-time detection of the charging vehicle and the corresponding battery management system.

[0013] The vehicle type identification can be obtained based on the vehicle identification code of the charging vehicle;

[0014] The identification of the power demand is based on the battery current, battery capacity, and power demand formula calculated by the battery management system of the charging vehicle; wherein, the power demand formula is:

[0015]

[0016] Among them, C t C represents the total battery capacity. r This refers to the remaining battery capacity. Let I be the integral of the charging current I over time [t0, t1], where t0 is the start time of charging and t1 is the detection time.

[0017] Preferably, the power detection unit calculates the predicted power based on the power demand and the power adjustment formula; wherein the power adjustment formula is:

[0018] P = β1*Q + β2*t + P b

[0019] Where t is the charging time and t = t1 - t0, P b β1 and β2 are the preset base charging power, β1 and β2 are the regression coefficients related to power demand and charging time, and P is the calculated predicted power.

[0020] Preferably, the variable frequency fan uses the real-time temperature collected by the temperature sensor, and the preset temperature threshold is used to divide the temperature of the cabinet into different temperature ranges, including a low temperature range, a medium temperature range and a high temperature range, and the fan speed is controlled based on the temperature range.

[0021] Preferably, controlling the fan speed based on the temperature range includes:

[0022] When the temperature is in the aforementioned low-temperature range, heat dissipation is performed based on a preset low-speed fan.

[0023] When the temperature is in the aforementioned high-temperature range, heat dissipation is performed based on a preset high-speed fan.

[0024] When the temperature is in the medium temperature range, the fan speed is adjusted using a speed adjustment formula, which is:

[0025]

[0026] Where n0 is the low-speed fan, n1 is the high-speed fan, T is the current temperature in the medium temperature range, T1 is the lower limit of the medium temperature range, T2 is the upper limit of the medium temperature range in the low temperature range, and n is the fan speed at the calculated temperature T.

[0027] Preferably, the liquid-cooled radiator is provided with heat dissipation fins, and the distance between the heat dissipation fins and the variable frequency fan is calculated based on the air outlet of the variable frequency fan, the air velocity at the fan outlet, the time required for the air to reach the heat dissipation fins from the air outlet, and the angle between the air outlet of the fan and the normal direction of the heat dissipation fins.

[0028] Preferably, the self-diagnostic unit includes:

[0029] The system collects feedback on the current, speed, and temperature control effect of the variable frequency fan during operation. A fault diagnosis formula is used to determine if a fault exists in the variable frequency fan. If a fault is found, an alarm signal is issued; otherwise, data collection continues. The fault diagnosis formula is as follows:

[0030]

[0031] Among them, I 风机 I is the operating current of the variable frequency fan. 风机标准 Let n be the standard current of the variable frequency fan, and n be the operating speed of the variable frequency fan. 标准 ΔT represents the standard speed of the variable frequency fan, and ΔT represents the actual temperature control effect of the variable frequency fan. 预期 F represents the expected temperature control effect of the variable frequency fan, and F is the calculated fault index. When F is greater than or equal to the preset fault index threshold, the variable frequency fan is determined to have a fault.

[0032] Preferably, the preset reflux temperature threshold includes:

[0033] The current temperature of the coolant is collected, and the return flow temperature threshold is calculated based on this current temperature and the predicted power. The calculation is as follows:

[0034] The heat dissipation for the next heat generation is calculated based on the predicted power. The calculation is as follows:

[0035] Q h =P*t 散热 *η

[0036] Where P is the predicted power, t 散热 The time interval for the next heat dissipation is defined based on the charging pile's historical operating data and charging mode. η represents the heat dissipation efficiency, which is the efficiency of the charging pile in converting electrical energy into heat and dissipating it, obtained through statistical analysis of experimental data. h For the next heat dissipation;

[0037] Based on Q h and the current temperature T of the coolant c The reflux temperature threshold is calculated as follows:

[0038]

[0039] Where m is the mass of the coolant, c is the specific heat capacity of the coolant, and T is the mass of the coolant. r This is the calculated reflux temperature threshold.

[0040] Beneficial Effects: The cold-plate type liquid-cooled charging pile of this application rationally arranges components such as the liquid storage tank, liquid-cooled pump, backplane power module, liquid-cooled pipes, liquid-cooled radiator, and variable frequency fan in a cabinet, achieving efficient heat dissipation and charging functions; it provides power for heat dissipation based on coolant circulation; it utilizes the backplane power module and liquid-cooled pipes to accurately absorb heat; it uses the liquid-cooled radiator and variable frequency fan to work together to drive heat dissipation and ensure the good circulation of coolant; it detects and predicts power and controls the connection of power units to achieve intelligent charging; it uses the self-diagnosis of the variable frequency fan to detect faults in a timely manner and ensure the safe operation of the equipment; and it optimizes the heat dissipation process by setting the unidirectional coolant delivery path and return temperature threshold. Thus, it effectively solves the heat dissipation problem of charging piles, improves charging efficiency, reduces equipment failure rate, and extends service life. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of a cold plate type liquid-cooled charging pile provided in an embodiment of this application.

[0043] In the diagram: 1. Cabinet; 2. Liquid storage tank; 3. Liquid cooling pump; 4. Backplane power module; 5. Liquid cooling pipes; 6. Heat dissipation module; 7. Fan opening. Detailed Implementation

[0044] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0045] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] This embodiment discloses, as follows: Figure 1The cold plate type liquid-cooled charging pile shown includes a cabinet 1. The bottom area of ​​the cabinet 1 is provided with a liquid storage tank 2 for storing coolant and a liquid-cooled pump 3 for providing power for coolant circulation. The middle area of ​​the cabinet 1 is provided with a back plate type power module 4. Liquid-cooled pipes 5 are provided on both sides or one side of the back plate type power module 4 for coolant circulation. The top area of ​​the cabinet 1 is provided with a heat dissipation module 6 and a corresponding fan opening 7. The heat dissipation module 6 includes a liquid-cooled heat sink and a variable frequency fan connected to a temperature sensor.

[0047] The backplate power module 4 includes multiple power units, a power detection unit, and a backplate slot. The power units and the power detection unit are disposed on the backplate slot. When the backplate power module 4 is running, the power detection unit detects the predicted power required by the charging vehicle and controls the access of the power units based on the predicted power.

[0048] When the liquid-cooled radiator is running, the variable frequency fan controls the fan speed based on the real-time temperature collected by the temperature sensor, and uses the variable frequency fan to dissipate heat from the coolant in the liquid-cooled radiator. The air generated by the heat dissipation is discharged upward through the fan opening 7. The variable frequency fan is equipped with a self-diagnostic unit for detecting whether there is a fault in the variable frequency fan.

[0049] When the cold plate type liquid-cooled charging pile is running, the back plate type power module 4 operates to charge the charging vehicle. At the same time, the liquid cooling pump 3 operates to transport the coolant in the storage tank 2 in one direction through the liquid cooling pipe 5. This one-way transport is as follows: from the storage tank 2 to the liquid cooling radiator, the liquid cooling radiator operates to transport the cooled coolant back to the storage tank 2; wherein, when the temperature of the coolant meets the preset return temperature threshold, the cooled coolant is transported back to the storage tank 2.

[0050] It should be noted that in practical applications, the liquid cooling pipes 5 are arranged on both sides or one side of the backplate power module 4 to surround the backplate power module 4, thereby improving heat dissipation efficiency. Figure 1 In the diagram, only a partial illustration of the liquid cooling pipe 5 is shown.

[0051] Based on the above, this embodiment utilizes the existing classic rack-type structure to rationally arrange components such as the liquid storage tank, liquid cooling pump, backplane power module, liquid cooling pipes, liquid cooling radiator, and variable frequency fan, achieving efficient heat dissipation and charging functions. Specifically, the bottom liquid storage tank and liquid cooling pump ensure coolant circulation, providing power for heat dissipation; the middle backplane power module and liquid cooling pipes accurately absorb heat; the top liquid cooling radiator and variable frequency fan work together to promptly dissipate heat and ensure healthy coolant circulation; the power detection unit detects and predicts power and controls the power unit connection, achieving intelligent charging; the variable frequency fan's self-diagnostic unit can promptly detect faults, ensuring safe equipment operation; the unidirectional coolant delivery path and return temperature threshold settings optimize the heat dissipation process; thus, overall, it effectively solves the heat dissipation problem of charging piles, improves charging efficiency, reduces equipment failure rate, and extends service life.

[0052] Specifically, the front panel of cabinet 1 is equipped with a touch screen, which is used for interaction between the cold plate type liquid-cooled charging pile and the user.

[0053] Based on the above, this embodiment utilizes existing interactive technology to install a touch screen on the front panel of the charging station, enabling convenient interaction between users and the charging pile. Vehicle owners can intuitively set charging parameters through the touch screen, such as selecting the charging mode and setting the target battery level. Simultaneously, they can view key information such as charging progress, power output, and estimated costs in real time, making the charging process clear at a glance. This improves the user's charging experience and reduces operational errors. Furthermore, the touch screen design aligns with modern user habits, enhancing the usability of the charging pile and helping to increase its usage frequency and market acceptance, enabling it to better meet user needs in various scenarios.

[0054] Specifically, the power unit is equipped with an independent plug-in interface. The power unit is connected using this plug-in interface. During connection and operation, the plug-in and plug-out time of the power unit is collected. When the plug-in and plug-out time exceeds the preset plug-in and plug-out time threshold, the power unit is determined to be abnormal and reported. The plug-in and plug-out time is based on the electrical connection time, which is the time to achieve electrical connection and complete self-test.

[0055] Based on the above, this embodiment achieves effective monitoring of the power unit's operating status by setting an independent plug-in interface for the power unit and comparing the plug-in / plug-out time with a preset threshold. The independent plug-in / plug-out interface facilitates flexible access and replacement of the power unit, improving the flexibility of charging pile power allocation. During operation, the plug-in / plug-out time is collected and compared with a threshold set based on electrical connection time. If the plug-in / plug-out time is too long, an abnormality in the power unit can be promptly identified and reported, facilitating rapid location and resolution of problems by maintenance personnel. This design effectively avoids charging anomalies caused by power unit failures, ensuring the stability and reliability of the charging process, reducing economic losses caused by equipment failures, and also improving the overall maintenance efficiency of the charging pile and reducing equipment downtime.

[0056] Specifically, the power detection unit identifies the vehicle type and power demand based on real-time detection of the charging vehicle and the corresponding battery management system;

[0057] Vehicle type identification is based on the vehicle identification code of the charging vehicle;

[0058] The identification of power demand is based on the battery current, battery capacity, and power demand formula calculated by the battery management system of the charging vehicle; wherein, the power demand formula is:

[0059]

[0060] Among them, C t C represents the total battery capacity. r This refers to the remaining battery capacity. Let I be the integral of the charging current I over time [t0, t1], where t0 is the start time of charging and t1 is the detection time.

[0061] Through the above, this embodiment achieves accurate identification and demand analysis of charging vehicles. Accurate vehicle type identification helps charging stations match more suitable charging strategies, improving charging compatibility. Precise calculation of power demand allows charging stations to intelligently allocate power based on the actual vehicle situation, avoiding energy waste and improving charging efficiency. For example, for vehicles of different models and with remaining battery power, power output can be adjusted as needed, meeting fast charging requirements while protecting the battery. This precise identification and demand analysis function enhances the versatility and adaptability of charging stations and optimizes the quality of charging services.

[0062] Specifically, the power detection unit calculates the predicted power based on the power demand and the power adjustment formula; the power adjustment formula is as follows:

[0063] P = β1*Q + β2*t + P b

[0064] Where t is the charging time and t = t1 - t0, P bβ1 and β2 are the preset base charging power, β1 and β2 are the regression coefficients related to power demand and charging time, and P is the calculated predicted power.

[0065] Based on the above, this embodiment calculates the predicted power using a power adjustment formula based on power demand, achieving proactive allocation of charging power. By considering factors such as power demand and charging time, the power adjustment formula can more accurately predict the power required by the vehicle at different charging stages. Based on this prediction, the charging station can pre-allocate power units, making the charging process more efficient. For example, in the initial stage of charging, the charging power is quickly increased based on the predicted power, shortening the charging time; when nearing full charge, the power is adjusted to avoid overcharging and protect the battery. This not only improves charging efficiency but also enhances energy utilization efficiency, reduces unnecessary power loss, and extends battery life, providing users with a better charging experience.

[0066] Specifically, the variable frequency fan uses the real-time temperature collected by the temperature sensor, and the preset temperature threshold divides the temperature of cabinet 1 into different temperature ranges, including low temperature range, medium temperature range and high temperature range, and controls the fan speed based on the temperature range.

[0067] Through the above, this embodiment achieves intelligent adjustment of the fan speed. By dividing the temperature into low, medium, and high temperature ranges, the variable frequency fan can adjust its speed according to the temperature characteristics of each range. In the low temperature range, the fan operates at a lower speed, which meets the heat dissipation requirements while reducing energy consumption and noise; in the high temperature range, the fan operates at high speed to quickly dissipate a large amount of heat; in the medium temperature range, the speed is flexibly adjusted according to the real-time temperature. This intelligent adjustment method can effectively maintain the internal temperature stability of the charging pile, ensure the normal operation of each component, improve the efficiency and reliability of the heat dissipation system, reduce equipment operating costs, and better meet the requirements for low noise.

[0068] Specifically, controlling the fan speed based on temperature range includes:

[0069] When in the low temperature range, heat dissipation is performed based on the preset low fan speed;

[0070] When in a high-temperature range, heat dissipation is achieved based on a preset high-speed fan.

[0071] When the temperature is in the medium range, the fan speed is adjusted using the speed adjustment formula, which is:

[0072]

[0073] Where n0 is the low-speed fan, n1 is the high-speed fan, T is the current temperature in the medium temperature range, T1 is the lower limit of the medium temperature range, T2 is the upper limit of the medium temperature range in the low temperature range, and n is the fan speed at the calculated temperature T.

[0074] Based on the above, this embodiment achieves refined heat dissipation control by setting different fan speed control strategies for different temperature ranges. In the low-temperature range, a preset low fan speed is used to ensure heat dissipation while reducing energy consumption and noise; in the high-temperature range, a high fan speed is activated to ensure efficient heat dissipation and prevent overheating. In the medium-temperature range, a speed adjustment formula is used to dynamically adjust the fan speed according to the real-time temperature, ensuring a precise match between heat dissipation intensity and actual temperature requirements. This refined control avoids frequent and significant adjustments to the fan speed, extends the fan's lifespan, further improves the stability and reliability of the heat dissipation system, effectively reduces internal temperature fluctuations in the charging pile, and ensures stable operation and charging efficiency.

[0075] Specifically, the liquid-cooled radiator is equipped with heat dissipation fins. The distance between the heat dissipation fins and the variable frequency fan is calculated based on the air outlet of the variable frequency fan, the air velocity at the fan outlet, the time required for the air to reach the heat dissipation fins from the air outlet, and the angle between the air outlet of the fan and the normal direction of the heat dissipation fins.

[0076] In a preferred embodiment of this invention, the distance between the heat sink fins and the variable frequency fan is determined using a distance calculation formula, which is:

[0077]

[0078] Where v is the wind speed at the fan outlet, t α θ is the time required for air to travel from the air outlet to the heat sink fins, and sinθ is the sine of the angle between the fan outlet and the normal direction of the heat sink fins.

[0079] Based on the above, this embodiment calculates and sets the distance between the heat dissipation fins and the variable frequency fan, thereby optimizing heat dissipation efficiency. By accurately calculating this distance, the airflow from the fan can more evenly and efficiently cover the heat dissipation fins, enhancing heat exchange. A reasonable distance setting avoids airflow turbulence or overheating concentration caused by excessive proximity, and also prevents poor heat dissipation due to excessive distance. The optimized layout improves the heat dissipation capacity of the liquid-cooled radiator, thereby enhancing the overall heat dissipation performance of the charging pile, ensuring stable operation of the equipment during high-power charging, reducing charging failures caused by heat dissipation issues, and improving equipment reliability.

[0080] Specifically, the self-diagnostic unit includes:

[0081] The system collects feedback on the current, speed, and temperature control performance of the variable frequency fan during operation. A fault diagnosis formula is used to determine if a fault exists in the variable frequency fan. If a fault is found, an alarm signal is issued; otherwise, data collection continues. The fault diagnosis formula is as follows:

[0082]

[0083] Among them, I 风机 I is the operating current of the variable frequency fan. 风机标准 Let n be the standard current of the variable frequency fan, and n be the operating speed of the variable frequency fan. 标准 ΔT represents the standard speed of the variable frequency fan, and ΔT represents the actual temperature control effect of the variable frequency fan. 预期 F represents the expected temperature control effect of the variable frequency fan, and F is the calculated fault index. When F is greater than or equal to the preset fault index threshold, the variable frequency fan is determined to have a fault.

[0084] Through the above, this embodiment achieves real-time monitoring and fault early warning of the variable frequency fan. The fault diagnosis formula integrates multiple key parameters to accurately assess the fan's operating status. Once the fault index exceeds a preset threshold, an alarm signal is immediately issued to remind maintenance personnel to handle the situation promptly. This function can effectively prevent heat dissipation failure caused by fan malfunctions, avoid damage to charging piles due to overheating, and ensure the safe and stable operation of the equipment. At the same time, real-time monitoring helps to identify potential fault hazards in advance, facilitates the scheduling of preventive maintenance, reduces equipment downtime, lowers maintenance costs, and improves the availability and reliability of the charging piles.

[0085] Specifically, the preset reflux temperature threshold includes:

[0086] The current temperature of the coolant is collected, and the return flow temperature threshold is calculated based on this current temperature and the predicted power. The calculation is as follows:

[0087] The heat dissipation for the next event is calculated based on the predicted power. The calculation is as follows:

[0088] Q h =P*t 散热 *η

[0089] Where P is the predicted power, t 散热 The time interval for the next heat dissipation is defined based on the charging pile's historical operating data and charging mode. η represents the heat dissipation efficiency, which is the efficiency of the charging pile in converting electrical energy into heat and dissipating it, obtained through statistical analysis of experimental data. h For the next heat dissipation;

[0090] Based on Q h and the current temperature T of the coolant c The reflux temperature threshold is calculated as follows:

[0091]

[0092] Where m is the mass of the coolant, c is the specific heat capacity of the coolant, and T is the mass of the coolant. r This is the calculated reflux temperature threshold.

[0093] Through the above, this embodiment achieves precise control of coolant circulation. The heat dissipation for the next cycle is calculated based on predicted power, heat dissipation time interval, and heat dissipation efficiency. Then, the return temperature threshold is calculated by combining the coolant's mass and specific heat capacity. Return is initiated when the coolant temperature reaches this threshold, ensuring the coolant circulates at a suitable temperature. This precise control effectively maintains the coolant's heat dissipation performance, preventing excessively high or low coolant temperatures from affecting heat dissipation, ensuring stable operation of the charging pile's cooling system, improving the stability and reliability of the charging process, and extending equipment lifespan.

[0094] In summary, the cold-plate liquid-cooled charging pile of this embodiment achieves efficient heat dissipation and charging functions by rationally arranging components such as the liquid storage tank, liquid-cooled pump, backplane power module, liquid-cooled pipes, liquid-cooled radiator, and variable frequency fan in a cabinet. It utilizes coolant circulation to power heat dissipation; precisely absorbs heat using the backplane power module and liquid-cooled pipes; and works in tandem with the liquid-cooled radiator and variable frequency fan to drive heat dissipation and ensure healthy coolant circulation. It detects and predicts power and controls power unit access for intelligent charging; and the variable frequency fan's self-diagnosis promptly detects faults, ensuring safe equipment operation. The unidirectional coolant delivery path and return temperature threshold settings optimize the heat dissipation process. Therefore, it effectively solves the heat dissipation problem of charging piles, improves charging efficiency, reduces equipment failure rate, and extends service life.

[0095] In the embodiments provided in this application, it should be understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code, or any suitable combination thereof. For hardware implementation, the processor may be implemented in one or more of the following: application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, other electronic units designed to implement the functions described herein, or combinations thereof. For software implementation, some or all of the processes of the embodiments may be performed by a computer program instructing the associated hardware. During implementation, the program may be stored in a computer-readable storage medium or transmitted as one or more instructions or code on a computer-readable storage medium. Computer-readable storage media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of a computer program from one place to another. Storage media may be any available medium accessible to a computer. Computer-readable storage media may include, but are not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code having the form of instructions or data structures and accessible to a computer.

[0096] Finally, it should be noted that the above description is only a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cold-plate type liquid-cooled charging pile, characterized in that, The system includes a cabinet (1), the bottom area of ​​which is provided with a storage tank (2) for storing coolant and a liquid cooling pump (3) for providing power for coolant circulation. The middle area of ​​the cabinet (1) is provided with a backplane power module (4), and the backplane power module (4) is provided with liquid cooling pipes (5) on both sides or one side for coolant circulation. The top area of ​​the cabinet (1) is provided with a heat dissipation module (6) and a corresponding fan opening (7). The heat dissipation module (6) includes a liquid cooling radiator and a variable frequency fan connected to a temperature sensor. The backplate power module (4) includes multiple power units, a power detection unit and a backplate slot. The power units and the power detection unit are disposed on the backplate slot. When the backplate power module (4) is running, the power detection unit detects the predicted power required by the charging vehicle and controls the access of the power unit based on the predicted power. When the liquid-cooled radiator is running, the variable frequency fan controls the fan speed based on the real-time temperature collected by the temperature sensor, and uses the variable frequency fan to dissipate heat from the coolant in the liquid-cooled radiator. The air generated by the heat dissipation is discharged upward through the fan opening (7); wherein, the variable frequency fan is equipped with a self-diagnostic unit for detecting whether the variable frequency fan has a fault. When the cold plate type liquid-cooled charging pile is running, the back plate type power module (4) charges the charging vehicle. At the same time, the liquid cooling pump (3) runs and transports the coolant in the storage tank (2) in one direction through the liquid cooling pipe (5). The one-way transport is as follows: the coolant is transported from the storage tank (2) to the liquid cooling radiator. The liquid cooling radiator runs and transports the cooled coolant back to the storage tank (2). When the temperature of the coolant meets the preset return temperature threshold, the cooled coolant is transported back to the storage tank (2). The power detection unit identifies the vehicle type and power demand based on real-time detection of the charging vehicle and the corresponding battery management system. The vehicle type identification can be obtained based on the vehicle identification code of the charging vehicle; The identification of the power demand is based on the battery current, battery capacity, and power demand formula calculated by the battery management system of the charging vehicle; wherein, the power demand formula is: In the formula, C t C represents the total battery capacity. r This refers to the remaining battery capacity. Let I be the integral of the charging current I over time [t0, t1], where t0 is the start time of charging and t1 is the detection time. The power detection unit calculates the predicted power based on the power demand and the power adjustment formula; wherein the power adjustment formula is: P=β1*Q+β2*t+P b In the formula, t is the charging time and t = t1 - t0, P b β1 and β2 are the regression coefficients related to power demand and charging time, and P is the calculated predicted power. The preset reflux temperature threshold includes: The current temperature of the coolant is collected, and the return flow temperature threshold is calculated based on this current temperature and the predicted power. The calculation is as follows: The heat dissipation for the next heat generation is calculated based on the predicted power. The calculation is as follows: Q h =P*t 散热 *η In the formula, P is the predicted power, and t 散热 The time interval for the next heat dissipation is defined based on the charging pile's historical operating data and charging mode. η represents the heat dissipation efficiency, which is the efficiency of the charging pile in converting electrical energy into heat and dissipating it, obtained through statistical analysis of experimental data. h For the next heat dissipation; Based on Q h and the current temperature T of the coolant c The reflux temperature threshold is calculated as follows: In the formula, m is the mass of the coolant, c is the specific heat capacity of the coolant, and T is the specific heat capacity of the coolant. r This is the calculated reflux temperature threshold.

2. The cold-plate type liquid-cooled charging pile according to claim 1, characterized in that, The front panel of the cabinet (1) is equipped with a touch screen, which is used for the interaction between the cold plate type liquid-cooled charging pile and the user.

3. The cold-plate type liquid-cooled charging pile according to claim 1, characterized in that, The power unit is equipped with an independent plug-in interface. The power unit is connected using this plug-in interface. During connection and operation, the plug-in and plug-out time of the power unit is collected. When the plug-in and plug-out time exceeds a preset plug-in and plug-out time threshold, the power unit is determined to be abnormal and reported. The plug-in and plug-out time is based on the electrical connection time, which is the time to achieve electrical connection and complete self-test.

4. The cold-plate type liquid-cooled charging pile according to claim 1, characterized in that, The variable frequency fan uses the real-time temperature collected by the temperature sensor, and the preset temperature threshold divides the temperature of the cabinet (1) into different temperature ranges, including low temperature range, medium temperature range and high temperature range, and controls the fan speed based on the temperature range.

5. The cold-plate type liquid-cooled charging pile according to claim 4, characterized in that, The method of controlling the fan speed based on the temperature range includes: When the temperature is in the aforementioned low-temperature range, heat dissipation is performed based on a preset low-speed fan. When the temperature is in the aforementioned high-temperature range, heat dissipation is performed based on a preset high-speed fan. When the temperature is in the medium temperature range, the fan speed is adjusted using a speed adjustment formula, which is: Where n0 is the low-speed fan, n1 is the high-speed fan, T is the current temperature in the medium temperature range, T1 is the lower limit of the medium temperature range, T2 is the upper limit of the medium temperature range in the low temperature range, and n is the fan speed at the calculated temperature T.

6. The cold-plate type liquid-cooled charging pile according to claim 1, characterized in that, The liquid-cooled radiator is equipped with heat dissipation fins. The distance between the heat dissipation fins and the variable frequency fan is calculated based on the air outlet of the variable frequency fan, the air velocity at the fan outlet, the time required for the air to reach the heat dissipation fins from the air outlet, and the angle between the air outlet of the fan and the normal direction of the heat dissipation fins.

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