Cold plate type liquid cooling charging pile

Abstract

The invention relates to the technical field of charging piles, and discloses a cold plate type liquid cooling charging pile which comprises a cabinet, a liquid storage tank, a liquid cooling pump, a back plate type power module, a liquid cooling pipeline, a liquid cooling radiator, a frequency conversion fan and a fan opening. According to the invention, power is provided for heat dissipation based on cooling liquid circulation; the back plate type power module and the liquid cooling pipeline are used for accurately absorbing heat; the liquid cooling radiator and the frequency conversion fan work cooperatively to dissipate heat and ensure virtuous circulation of cooling liquid; detecting the predicted power and controlling the access of the power unit to realize intelligent charging; faults are found in time based on self-diagnosis of the frequency conversion fan, and safe operation of equipment is guaranteed; a heat dissipation process is optimized by setting a one-way cooling liquid conveying path and a backflow temperature threshold value; therefore, the heat dissipation problem of the charging pile is effectively solved on the whole, the charging efficiency is improved, the equipment failure rate is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of charging piles, and specifically to a cold plate type liquid-cooled charging pile. Background Art

[0002] In recent years, the electric vehicle market has experienced explosive growth, which has put unprecedented high demands on the performance of charging piles. The disadvantages of traditional air-cooled charging piles are becoming increasingly prominent when dealing with high-power charging. High-power operation causes the charging pile power module to generate a lot of heat, and the air cooling efficiency is low, and the heat cannot be dissipated in time. This not only leads to a significant reduction in charging efficiency, but also accelerates component aging, greatly shortening the service life of the charging pile. At the same time, the harsh noise generated by the high-speed operation of the fan causes serious interference to the surrounding environment, and its use is limited in noise-sensitive areas such as residential areas.

[0003] Although some charging piles that have introduced liquid cooling technology have alleviated the heat dissipation problem to a certain extent, new problems have arisen. For example, Chinese Patent No. CN118003931A discloses a liquid-cooled charging pile and a charging pile group heat dissipation system. The sleeve heat exchanger it adopts has a complex structure. Although it realizes heat exchange of two heat dissipation cycles, the heat exchange efficiency is limited by the structure and it is difficult to meet the efficient heat dissipation requirements during high-power charging. In addition, the invention does not involve a flexible combination of power modules and cannot be adapted according to the power requirements of different vehicle models and charging scenarios. In terms of maintenance, the numerous connecting components and complex structures increase the difficulty and cost of maintenance. These problems have seriously hindered the development of charging pile technology.

[0004] In summary, a new cold plate liquid-cooled charging pile is urgently needed to solve the above 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 liquid-cooled charging pile to solve the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present application discloses the following technical solutions: a cold plate type liquid cooling charging pile, comprising a cabinet, a bottom area of ​​the cabinet is provided with a liquid storage tank for storing coolant and a liquid cooling pump for providing power for the circulation of the coolant, a middle area of ​​the cabinet is provided with a back plate type power module, both sides or one side of the back plate type power module are provided with liquid cooling pipes, the liquid cooling pipes are used for the circulation of the coolant, a top area of ​​the cabinet is provided with a heat dissipation module and a corresponding fan opening, the heat dissipation module comprises a liquid cooling radiator and a variable frequency fan connected to a temperature sensor;

[0007] The backplane power module includes a plurality of power units, a power detection unit and a backplane slot, wherein the power units and the power detection unit are arranged on the backplane slot; when the backplane power module is in operation, 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;

[0008] When the liquid-cooled radiator is in operation, 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 the coolant in the liquid-cooled radiator, and the wind generated by the heat dissipation is discharged upward through the fan opening; wherein the variable frequency fan is provided with a self-diagnosis unit for detecting whether the variable frequency fan has a fault;

[0009] When the cold plate type liquid-cooled charging pile is in operation, the back plate type power module is in operation to charge the charging vehicle, and at the same time, the liquid cooling pump is in operation to transport the coolant in the liquid storage tank through the liquid cooling pipeline in one direction, and the one-way transport is as follows: transporting from the liquid storage tank to the liquid cooling radiator, and the liquid cooling radiator is in operation to transport the coolant after heat dissipation back to the liquid storage tank; wherein, when the temperature of the coolant meets the preset reflux temperature threshold, the coolant after heat dissipation is transported back to the liquid storage tank.

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

[0011] Preferably, the power unit is provided with an independent plug-in interface, which is used to access the power unit. When the power unit is connected and operated, the plug-in time of the power unit is collected. When the plug-in time is greater than a preset plug-in time threshold, the power unit is determined to be abnormal and reported; wherein, the plug-in 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 identification of the vehicle type may be obtained based on a vehicle identification code of the charging vehicle;

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

[0015]

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

[0017] Preferably, the power detection unit calculates the predicted power based on the power demand and a 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 is the preset basic 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 divides the temperature of the cabinet into different temperature ranges, which include a low temperature range, a medium temperature range and a high temperature range, and controls the fan speed based on the temperature range.

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

[0022] When in the low temperature range, heat is dissipated based on a preset low-speed fan speed;

[0023] When in the high temperature range, heat is dissipated based on a preset high-end fan speed;

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

[0025]

[0026] Among them, n0 is the low-end fan speed, n1 is the high-end fan speed, 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 cooling fins, and the distance between the cooling fins and the variable frequency fan is calculated based on the air outlet of the variable frequency fan, the wind speed at the fan outlet, the time required for the wind to reach the cooling fins from the air outlet and the angle between the fan outlet and the normal direction of the cooling fins.

[0028] Preferably, the self-diagnosis unit comprises:

[0029] The current, speed and temperature control effect feedback of the variable frequency fan during operation are collected, and a fault diagnosis formula is used to determine whether the variable frequency fan has a fault. If so, an alarm signal is issued, otherwise, the collection continues; wherein the fault diagnosis formula is:

[0030]

[0031] Among them, I 风机 is the working current of the variable frequency fan, I 风机标准 is the standard current of the variable frequency fan, n is the operating speed of the variable frequency fan, n 标准 is the standard speed of the variable frequency fan, ΔT is the actual temperature control effect of the variable frequency fan, ΔT 预期 is 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, it is determined that the variable frequency fan has a fault.

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

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

[0034] The next heat dissipation heat is calculated based on the predicted power, and the calculation is:

[0035] Q h =P*t 散热 *η

[0036] Where P is the predicted power, t 散热 is the time interval for the next heat dissipation, which is determined based on the historical operation data and charging mode of the charging pile. η is the heat dissipation efficiency, which is the efficiency of the charging pile converting electrical energy into heat and dissipating it based on the statistical analysis of experimental data. Q h Dissipate heat for the next time;

[0037] Based on Q h and the current temperature of the coolant T c Calculate the reflow temperature threshold, which is calculated as:

[0038]

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

[0040] Beneficial effects: The cold plate liquid-cooled charging pile of the present application rationally arranges components such as the liquid storage tank, liquid cooling pump, backplate power module, liquid cooling pipe, liquid cooling radiator, and variable frequency fan based on the cabinet, thereby realizing efficient heat dissipation and charging functions; provides power for heat dissipation based on coolant circulation; utilizes backplate power module and liquid cooling pipe to accurately absorb heat; utilizes liquid cooling radiator and variable frequency fan to work together to dissipate heat and ensure the benign circulation of coolant; detects and predicts power and controls power unit access to realize intelligent charging; timely detects faults based on self-diagnosis of variable frequency fan to ensure safe operation of equipment; optimizes the heat dissipation process by setting a one-way coolant delivery path and a reflux temperature threshold; thereby effectively solving the heat dissipation problem of the charging pile as a whole, improving charging efficiency, reducing equipment failure rate, and extending service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

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

[0043] In the figure: 1. Cabinet; 2. Liquid storage tank; 3. Liquid cooling pump; 4. Backplane power module; 5. Liquid cooling pipeline; 6. Heat dissipation module; 7. Fan opening. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0045] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0046] This embodiment discloses Figure 1A cold plate type liquid cooling charging pile shown includes a cabinet 1, a liquid storage tank 2 for storing coolant and a liquid cooling pump 3 for providing power for coolant circulation are arranged in the bottom area of ​​the cabinet 1, a back plate type power module 4 is arranged in the middle area of ​​the cabinet 1, liquid cooling pipes 5 are arranged on both sides or one side of the back plate type power module 4, and the liquid cooling pipes 5 are used for coolant circulation, and a heat dissipation module 6 and a corresponding fan opening 7 are arranged in the top area of ​​the cabinet 1, and the heat dissipation module 6 includes a liquid cooling radiator and a variable frequency fan connected to a temperature sensor;

[0047] The backplane power module 4 includes a plurality of power units, a power detection unit and a backplane slot, wherein the power unit and the power detection unit are arranged on the backplane slot; when the backplane power module 4 is in operation, 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;

[0048] When the liquid cooling 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 the coolant in the liquid cooling radiator, and the wind generated by the heat dissipation is discharged upward through the fan opening 7; wherein, the variable frequency fan is provided with a self-diagnosis unit for detecting whether the variable frequency fan has a fault;

[0049] When the cold plate liquid-cooled charging pile is in operation, the backplate 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 liquid storage tank 2 through the liquid cooling pipe 5 in one direction. The one-way transportation is as follows: from the liquid storage tank 2 to the liquid cooling radiator, the liquid cooling radiator operates, and the coolant after heat dissipation is transported back to the liquid storage tank 2; wherein, when the temperature of the coolant meets the preset reflux temperature threshold, the coolant after heat dissipation is transported back to the liquid storage tank 2.

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

[0051] Based on the above, this embodiment utilizes the existing classic cabinet structure to rationally arrange components such as the liquid storage tank, liquid cooling pump, backplate power module, liquid cooling pipe, liquid cooling radiator, and variable frequency fan, thereby realizing efficient heat dissipation and charging functions; wherein, the liquid storage tank and liquid cooling pump at the bottom ensure the circulation of the coolant and provide power for heat dissipation; the backplate power module and liquid cooling pipe in the middle can accurately absorb heat; the liquid cooling radiator and variable frequency fan at the top work together to dissipate heat in time and ensure the benign circulation of the coolant; the power detection unit detects and predicts the power and controls the access of the power unit to realize intelligent charging; the self-diagnosis unit of the variable frequency fan can detect faults in time to ensure the safe operation of the equipment; the setting of the one-way coolant delivery path and the reflux temperature threshold optimizes the heat dissipation process; thereby effectively solving the heat dissipation problem of the charging pile as a whole, improving the charging efficiency, reducing the equipment failure rate, and extending the service life.

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

[0053] Based on the above, this embodiment uses existing interactive technology to set a touch operation screen on the front panel of the cabinet, which realizes convenient interaction between users and charging piles. Car owners can intuitively set charging parameters through the touch operation screen, such as selecting charging mode, setting target power, etc. At the same time, key information such as charging progress, power, and cost estimation can be viewed in real time, so that the charging process is clear at a glance. Thereby improving the user's charging experience and reducing operational errors. Moreover, the setting of the touch operation screen conforms to the operating habits of modern users, enhances the ease of use of charging piles, helps to increase the frequency of use and market acceptance of charging piles, and enables charging piles to better meet user needs in different scenarios.

[0054] Specifically, the power unit is provided with an independent plug-in interface, which is used to access the power unit. When the power unit is connected and running, the plug-in time of the power unit is collected. When the plug-in time is greater than a preset plug-in time threshold, the power unit is determined to be abnormal and reported; wherein, the plug-in 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 realizes effective monitoring of the operating status of the power unit by setting an independent plug-in interface for the power unit and collecting the plug-in time and comparing it with the preset threshold. The setting of the independent plug-in interface facilitates the flexible access and replacement of the power unit and improves the flexibility of the power allocation of the charging pile. During access operation, the plug-in time is collected and compared with the threshold set based on the electrical connection time. If the plug-in time is too long, the power unit abnormality can be determined and reported in time, which is convenient for operation and maintenance personnel to quickly locate and solve the problem. This design can effectively avoid charging anomalies caused by power unit failure, ensure the stability and reliability of the charging process, reduce economic losses caused by equipment failure, and also improve the overall maintenance efficiency of the charging pile and reduce 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] The identification of the vehicle type can be obtained 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 of the battery management system of the charging vehicle; wherein the power demand formula is:

[0059]

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

[0061] Through the above, this embodiment realizes the accurate identification and demand analysis of charging vehicles. Accurate identification of vehicle types helps charging piles match more appropriate charging strategies and improve charging compatibility. Accurate calculation of power demand allows charging piles to intelligently allocate power according to the actual situation of the vehicle, avoid energy waste, and improve charging efficiency. For example, for vehicles of different models and remaining power, the power output can be adjusted as needed to meet the needs of fast charging and protect the battery. This accurate identification and demand analysis function enhances the versatility and adaptability of charging piles 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; wherein the power adjustment formula is:

[0063] P=β1*Q+β2*t+P b

[0064] Where t is the charging time and t = t1-t0, P bis the preset basic 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 uses the power adjustment formula to calculate the predicted power based on the power demand, thereby realizing the forward-looking 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 result, the charging pile can allocate power units in advance to make the charging process more efficient. For example, in the early stage of charging, the charging power is quickly increased according to the predicted power to shorten the charging time; when it is close to full, the power is adjusted to avoid overcharging and protect the battery. This not only improves the charging efficiency, but also improves the energy utilization efficiency, reduces unnecessary power loss, and at the same time extends the 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 the cabinet 1 into different temperature intervals, including a low temperature interval, a medium temperature interval and a high temperature interval, and controls the fan speed based on the temperature interval.

[0067] Through the above, this embodiment realizes the intelligent adjustment of the fan speed. By dividing the temperature conditions into low temperature, medium temperature and high temperature intervals, the variable frequency fan can adjust the speed according to the temperature characteristics of different intervals. In the low temperature range, the fan runs at a lower speed, which can not only meet the heat dissipation requirements, but also reduce energy consumption and noise; in the high temperature range, the fan runs at high speed and quickly dissipates 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 of the charging pile stable, ensure the normal operation of each component, improve the efficiency and reliability of the heat dissipation system, while reducing the operating cost of the equipment, and better meet the demand for low noise.

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

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

[0070] When in the high temperature range, heat is dissipated based on the preset high-end fan speed;

[0071] When in the medium temperature range, use the speed adjustment formula to adjust the fan speed. The speed adjustment formula is:

[0072]

[0073] Among them, n0 is the low-end fan speed, n1 is the high-end fan speed, 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 sets different fan speed control strategies for different intervals on the basis of the divided temperature intervals, thereby realizing refined heat dissipation control. In the low-temperature interval, a preset low-speed fan is used to ensure heat dissipation while reducing energy consumption and noise; in the high-temperature interval, a high-speed fan is used to ensure efficient heat dissipation and prevent equipment overheating. In the medium-temperature interval, the speed adjustment formula is used to dynamically adjust the fan speed according to the real-time temperature, so that the heat dissipation intensity is accurately matched to the actual temperature requirements. This refined control avoids frequent and large adjustments to the fan speed, extends the service life of the fan, further improves the stability and reliability of the heat dissipation system, effectively reduces the temperature fluctuations inside the charging pile, and ensures the stable operation and charging efficiency of the charging pile.

[0075] Specifically, the liquid cooling radiator is provided with cooling fins, and the distance between the cooling fins and the variable frequency fan is calculated based on the air outlet of the variable frequency fan, the wind speed at the fan outlet, the time required for the wind to reach the cooling fins from the air outlet, and the angle between the fan outlet and the normal direction of the cooling fins.

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

[0077]

[0078] Where v is the wind speed at the fan outlet, t α is the time required for wind to reach the heat sink fins from the air outlet, and sinθ is the sine value 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 cooling fins and the variable frequency fan, thereby optimizing the heat dissipation efficiency. By accurately calculating this distance, the wind blown by the fan can cover the cooling fins more evenly and efficiently, thereby enhancing the heat exchange effect. Reasonable distance setting can avoid wind turbulence or concentration of overheated areas caused by too close distance, and can also prevent poor heat dissipation caused by too far distance. The optimized layout improves the heat dissipation capacity of the liquid-cooled radiator, thereby improving the heat dissipation performance of the entire charging pile, ensuring that the equipment can operate stably during high-power charging, reducing charging failures caused by heat dissipation problems, and improving the reliability of the equipment.

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

[0081] Collect the current, speed and temperature control effect feedback of the variable frequency fan during operation, and use the fault diagnosis formula to determine whether the variable frequency fan has a fault. If so, issue an alarm signal, otherwise continue to collect; the fault diagnosis formula is:

[0082]

[0083] Among them, I 风机 is the working current of the variable frequency fan, I 风机标准 is the standard current of the variable frequency fan, n is the operating speed of the variable frequency fan, n 标准 is the standard speed of the variable frequency fan, ΔT is the actual temperature control effect of the variable frequency fan, ΔT 预期 is 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, it is determined that the variable frequency fan has a fault.

[0084] Through the above, this embodiment realizes real-time monitoring and fault warning of variable frequency fans. The fault diagnosis formula integrates multiple key parameters and can accurately evaluate the operating status of the fan. Once the fault index exceeds the preset threshold, an alarm signal is immediately issued to remind the operation and maintenance personnel to deal with it in time. This function can effectively prevent heat dissipation failure caused by fan failure, avoid damage to the charging pile due to overheating, and ensure the safe and stable operation of the equipment. At the same time, real-time monitoring helps to detect potential fault hazards in advance, facilitates the arrangement of preventive maintenance, reduces equipment downtime, reduces operation and maintenance costs, and improves the availability and reliability of charging piles.

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

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

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

[0088] Q h =P*t 散热 *η

[0089] Where P is the predicted power, t 散热 is the time interval for the next heat dissipation, which is determined based on the historical operation data and charging mode of the charging pile. η is the heat dissipation efficiency, which is the efficiency of the charging pile converting electrical energy into heat and dissipating it based on the statistical analysis of experimental data. Q h Dissipate heat for the next time;

[0090] Based on Q h and the current temperature of the coolant T c Calculate the reflow temperature threshold, which is calculated as:

[0091]

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

[0093] Through the above, this embodiment realizes precise control of coolant circulation. The next heat dissipation heat is calculated based on the predicted power, heat dissipation time interval and heat dissipation efficiency, and the reflux temperature threshold is calculated in combination with the mass and specific heat capacity of the coolant. When the coolant temperature reaches the threshold, reflux is performed to ensure that the coolant circulates at an appropriate temperature. This precise control can effectively maintain the heat dissipation performance of the coolant, avoid the coolant temperature being too high or too low affecting the heat dissipation effect, ensure the stable operation of the charging pile heat dissipation system, improve the stability and reliability of the charging process, and extend the service life of the equipment.

[0094] In summary, the cold plate liquid-cooled charging pile of this embodiment reasonably arranges components such as the liquid storage tank, liquid cooling pump, backplate power module, liquid cooling pipe, liquid cooling radiator, and variable frequency fan based on the cabinet, thereby realizing efficient heat dissipation and charging functions; provides power for heat dissipation based on coolant circulation; utilizes the backplate power module and liquid cooling pipe to accurately absorb heat; utilizes the liquid cooling radiator and variable frequency fan to work together to dissipate heat and ensure the benign circulation of the coolant; detects and predicts power and controls the access of the power unit to realize intelligent charging; timely detects faults based on the self-diagnosis of the variable frequency fan to ensure the safe operation of the equipment; optimizes the heat dissipation process by setting the one-way coolant delivery path and the reflux temperature threshold; thereby effectively solving the heat dissipation problem of the charging pile as a whole, improving charging efficiency, reducing equipment failure rate, and extending service life.

[0095] In the embodiments provided in the present application, it should be understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code or any appropriate combination thereof. For hardware implementation, the processor can be implemented in one or more of the following units: application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, other electronic units designed to implement the functions described herein or their combination. For software implementation, part or all of the flow of the embodiment can be completed by instructing the relevant hardware through a computer program. When implemented, the above program can be stored in a computer-readable storage medium or transmitted as one or more instructions or codes on a computer-readable storage medium. Computer-readable storage media include computer storage media and communication media, wherein the communication medium includes any medium that is convenient for transmitting a computer program from one place to another. The storage medium can be any available medium that a computer can access. The computer-readable storage medium can include but is not limited to RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer.

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

Claims

1. A cold plate liquid cooling charging pile, characterized in that: The cabinet (1) comprises a liquid storage tank (2) for storing cooling liquid and a liquid cooling pump (3) for providing power for cooling liquid circulation, which is arranged at the bottom area of ​​the cabinet (1); a back plate power module (4) is arranged at the middle area of ​​the cabinet (1); liquid cooling pipes (5) are arranged on both sides or one side of the back plate power module (4); the liquid cooling pipes (5) are used for cooling liquid circulation; a heat dissipation module (6) and a corresponding fan opening (7) are arranged at the top area of ​​the cabinet (1); the heat dissipation module (6) comprises a liquid cooling radiator and a variable frequency fan connected to a temperature sensor; The backplane power module (4) comprises a plurality of power units, a power detection unit and a backplane slot, wherein the power units and the power detection unit are arranged on the backplane slot; when the backplane power module (4) is in operation, 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 in operation, 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 the coolant in the liquid-cooled radiator, and the wind generated by the heat dissipation is discharged upward through the fan opening (7); wherein the variable frequency fan is provided with a self-diagnosis unit for detecting whether the variable frequency fan has a fault; When the cold plate type liquid cooling charging pile is in operation, the back plate type power module (4) is in operation to charge the charging vehicle, and at the same time, the liquid cooling pump (3) is in operation to transport the cooling liquid in the liquid storage tank (2) through the liquid cooling pipe (5) in a one-way manner, wherein the one-way transport is: transported from the liquid storage tank (2) to the liquid cooling radiator, and the liquid cooling radiator is in operation to transport the cooling liquid back to the liquid storage tank (2); wherein, when the temperature of the cooling liquid meets a preset reflux temperature threshold, the cooling liquid is transported back to the liquid storage tank (2).

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

3. The cold plate liquid cooling charging pile according to claim 1, characterized in that: The power unit is provided with an independent plug-in interface, which is used to access the power unit. When the power unit is connected and operated, the plug-in time of the power unit is collected. When the plug-in time is greater than a preset plug-in time threshold, the power unit is determined to be abnormal and reported; wherein, the plug-in 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 cooling charging pile according to claim 1, characterized in that: 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 identification of the vehicle type may be obtained based on a vehicle identification code of the charging vehicle; The power demand is identified based on the battery current, battery capacity and power demand formula of the battery management system of the charging vehicle; wherein the power demand formula is: Among them, C t is the total capacity of the battery, C r is the remaining battery capacity, is the integral of the charging current I over the time [t0, t1], t0 is the charging start time, and t1 is the detection time.

5. The cold plate type liquid cooling charging pile according to claim 4, characterized in that: 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 Where t is the charging time and t = t1-t0, P b is the preset basic charging power, β1 and β2 are the regression coefficients related to power demand and charging time, and P is the calculated predicted power.

6. The cold plate type liquid cooling 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 to divide the temperature of the cabinet (1) into different temperature intervals, the temperature intervals including a low temperature interval, a medium temperature interval and a high temperature interval, and controls the fan speed based on the temperature intervals.

7. The cold plate type liquid cooling charging pile according to claim 6, characterized in that: The controlling of the fan speed based on the temperature range includes: When in the low temperature range, heat is dissipated based on a preset low-speed fan speed; When in the high temperature range, heat is dissipated based on a preset high-end fan speed; When in the medium temperature range, the fan speed is adjusted using a speed adjustment formula, and the speed adjustment formula is: Among them, n0 is the low-end fan speed, n1 is the high-end fan speed, 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.

8. The cold plate type liquid cooling charging pile according to claim 1, characterized in that: The liquid cooling radiator is provided with cooling fins, and the distance between the cooling fins and the variable frequency fan is calculated based on the air outlet of the variable frequency fan, the wind speed of the fan outlet, the time required for the wind to reach the cooling fins from the air outlet, and the angle between the fan outlet and the normal direction of the cooling fins.

9. The cold plate type liquid cooling charging pile according to claim 1, characterized in that: The self-diagnosis unit comprises: The current, speed and temperature control effect feedback of the variable frequency fan during operation are collected, and a fault diagnosis formula is used to determine whether the variable frequency fan has a fault. If so, an alarm signal is issued, otherwise, the collection continues; wherein the fault diagnosis formula is: Among them, I 风机 is the working current of the variable frequency fan, I 风机标准 is the standard current of the variable frequency fan, n is the operating speed of the variable frequency fan, n 标准 is the standard speed of the variable frequency fan, ΔT is the actual temperature control effect of the variable frequency fan, ΔT 预期 is 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, it is determined that the variable frequency fan has a fault.

10. The cold plate liquid cooling charging pile according to claim 1, characterized in that: The preset reflow temperature threshold includes: The current temperature of the coolant is collected, and the return temperature threshold is calculated based on the current temperature and the predicted power. The calculation is: The next heat dissipation heat is calculated based on the predicted power, and the calculation is: Q h =P*t 散热 *η Where P is the predicted power, t 散热 is the time interval for the next heat dissipation, which is determined based on the historical operation data and charging mode of the charging pile. η is the heat dissipation efficiency, which is the efficiency of the charging pile converting electrical energy into heat and dissipating it based on the statistical analysis of experimental data. Q h Dissipate heat for the next time; Based on Q h and the current temperature of the coolant T c Calculate the reflow temperature threshold, which is calculated as: Where m is the mass of the coolant, c is the specific heat capacity of the coolant, T r is the calculated reflow temperature threshold.

Images