Charging equipment heat dissipation control method and device, charging equipment and medium

Abstract

The embodiment of the invention provides a charging equipment heat dissipation control method and device, charging equipment and a medium, and the method comprises the steps: responding to a charging instruction, and controlling each charging module to operate based on a preset operation strategy, so as to obtain the temperature data of each charging module. Then, reliability evaluation is carried out on each charging module according to the temperature data of each charging module, the target charging power and the environment temperature parameter, so that a first target air outlet temperature independently corresponding to each charging module is determined; and performing weighted optimization processing based on the first target air outlet temperature of each charging module to obtain a second target air outlet temperature for the charging equipment. And finally, according to the second target air outlet temperature and the current air outlet temperature of the charging equipment, the duty ratio of the cooling fan is controlled. Therefore, the regulation and control accuracy of the heat dissipation fan in the charging equipment is effectively improved, and the effect of considering the heat dissipation power utilization performance and the equipment heat dissipation effectiveness is achieved.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation control technology, and in particular to a heat dissipation control method and device for charging equipment, a charging equipment and a medium. Background Art

[0002] The performance loss inside high-power charging equipment is often dissipated into the cabinet of the charging equipment in the form of heat. Therefore, heat dissipation control of the charging equipment is particularly important for the stable operation of the charging equipment. The heat dissipation control device in the charging equipment includes a heat dissipation fan and a module fan built into each internal charging module. In the traditional heat dissipation control scheme for charging equipment, the control strategy for the heat dissipation fan needs to be determined based on the control strategy of each module fan. Since the control strategies of different module fans are pre-configured for the charging module and there are differences between the control strategies, this method may cause the power of the heat dissipation fan to be too large or too small, resulting in insufficient heat dissipation or waste of heat dissipation power. At present, the control accuracy of the heat dissipation fan in the charging equipment is poor.

[0003] Therefore, how to solve the problem of poor regulation accuracy of the heat dissipation fan in the charging device in the prior art has become a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0004] Based on the above problems, in order to solve the problem of poor control accuracy of the heat dissipation fan in the charging device in the prior art, the embodiments of the present application provide a charging device heat dissipation control method, device, charging device and medium.

[0005] The embodiments of the present application disclose the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a method for controlling heat dissipation of a charging device, which is applied to a charging device, wherein the charging device includes a plurality of charging modules and at least one heat dissipation fan, and the method includes:

[0007] In response to a charging instruction, each of the charging modules is controlled to operate based on a preset operation strategy to obtain temperature data of each of the charging modules; the charging instruction includes: a target charging power;

[0008] Performing reliability evaluation on each charging module according to the temperature data of each charging module, the target charging power and the ambient temperature parameter to determine a first target air outlet temperature corresponding to each charging module;

[0009] Performing weighted optimization processing based on the first target air outlet temperature of each charging module to obtain a second target air outlet temperature for the charging device;

[0010] The duty cycle of the heat dissipation fan is controlled according to the second target air outlet temperature and the current air outlet temperature of the charging device.

[0011] In a possible implementation, the temperature data includes: module inlet air temperature, module outlet air temperature and key component temperature; each charging module has a corresponding preset reliability evaluation curve;

[0012] The reliability evaluation of each charging module is performed according to the temperature data of each charging module, the target charging power and the ambient temperature parameter to determine the first target air outlet temperature corresponding to each charging module individually, including:

[0013] Perform wind pressure loss analysis according to the module air inlet temperature, the module air outlet temperature and the temperature of the key components of each charging module to obtain a ventilation system status index of each charging module; the ventilation system status index is used to characterize the wind pressure loss of the ventilation system in the charging module;

[0014] The ventilation system status index, the target charging power and the ambient temperature parameter of each charging module are used as input data of the preset reliability evaluation curve corresponding to each charging module to determine the first target air outlet temperature of each charging module.

[0015] In a possible implementation, before acquiring the temperature data of each charging module, the method further includes:

[0016] Using the ambient temperature parameter and the target charging power as input data for initializing a database to determine a first duty cycle that matches the ambient temperature parameter and the target charging power;

[0017] The first duty cycle is determined as an initial duty cycle of the heat dissipation fan.

[0018] In a possible implementation, controlling the duty cycle of the cooling fan according to the second target air outlet temperature and the current air outlet temperature of the charging device includes:

[0019] Determining a duty cycle control value for the heat dissipation fan according to a temperature difference between the second target air outlet temperature and the current air outlet temperature;

[0020] The initial duty cycle of the heat dissipation fan is adjusted by the duty cycle control value to control the duty cycle of the heat dissipation fan.

[0021] In a possible implementation, after controlling the duty cycle of the heat dissipation fan according to the second target air outlet temperature and the current air outlet temperature of the charging device, the method further includes:

[0022] When the current air outlet temperature of the charging device is greater than a preset first threshold, adjusting the duty cycle of the heat dissipation fan to 100%, and obtaining the current air outlet temperature of the charging device after a preset first time period;

[0023] If, after the preset first time period, the current outlet air temperature of the charging device is greater than the preset first threshold and less than the preset second threshold, the charging device is derated and a device maintenance signal is generated; the preset second threshold is greater than the preset first threshold;

[0024] If the current air outlet temperature of the charging device is greater than the preset second threshold after the preset first time period has passed, the charging device is shut down and the device maintenance signal is generated.

[0025] In a second aspect, an embodiment of the present application provides a heat dissipation control device for a charging device, which is applied to a charging device, wherein the charging device includes a plurality of charging modules and at least one heat dissipation fan, and the system includes:

[0026] A data acquisition module, for controlling each of the charging modules to operate based on a preset operation strategy in response to a charging instruction, so as to acquire temperature data of each of the charging modules; the charging instruction includes: a target charging power;

[0027] a reliability evaluation module, configured to perform reliability evaluation on each charging module according to the temperature data of each charging module, the target charging power and the ambient temperature parameter, so as to determine a first target air outlet temperature corresponding to each charging module;

[0028] a weighted optimization module, configured to perform weighted optimization processing based on the first target air outlet temperature of each charging module to obtain a second target air outlet temperature for the charging device;

[0029] A duty cycle control module is used to control the duty cycle of the cooling fan according to the second target air outlet temperature and the current air outlet temperature of the charging device.

[0030] In a possible implementation, the temperature data includes: module inlet air temperature, module outlet air temperature and key component temperature; each charging module has a corresponding preset reliability evaluation curve;

[0031] The reliability evaluation module is specifically used for:

[0032] Perform wind pressure loss analysis according to the module air inlet temperature, the module air outlet temperature and the temperature of the key components of each charging module to obtain a ventilation system status index of each charging module; the ventilation system status index is used to characterize the wind pressure loss of the ventilation system in the charging module;

[0033] The ventilation system status index, the target charging power and the environmental parameters of each charging module are used as input data of the preset reliability evaluation curve corresponding to each charging module to determine the first target air outlet temperature of each charging module.

[0034] In a possible implementation, the device further includes: an initialization module; the initialization module is specifically configured to:

[0035] Using the ambient temperature parameter and the target charging power as input data for initializing a database to determine a first duty cycle that matches the ambient temperature parameter and the target charging power;

[0036] The first duty cycle is determined as an initial duty cycle of the heat dissipation fan.

[0037] In a third aspect, an embodiment of the present application provides a charging device, the device comprising: a processor, a memory, and a system bus;

[0038] The processor and the memory are connected via the system bus;

[0039] The memory is used to store one or more programs, and the one or more programs include instructions. When the instructions are executed by the processor, the processor executes any possible charging device heat dissipation control method in the first aspect.

[0040] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any possible charging device heat dissipation control method in the first aspect.

[0041] Compared with the prior art, the present application has the following beneficial effects: The embodiment of the present application provides a method, device, charging device and medium for controlling heat dissipation of a charging device. In the method, first, the charging instruction is responded to, and each charging module in the charging device is controlled to operate based on a preset operation strategy to obtain the specific temperature data of each charging module under the operation strategy. Subsequently, based on the actual temperature data of each charging module, combined with the target charging power indicated in the charging instruction and the ambient temperature parameters outside the charging device, the reliability of each charging module is evaluated to determine the first target air outlet temperature specific to each charging module, and on this basis, the first target air outlet temperature specific to each charging module is weighted and optimized, and then the second target air outlet temperature for the entire charging device is determined, so as to effectively control the duty cycle of the heat dissipation fan according to the second target air outlet temperature and the current air outlet temperature of the charging device.

[0042] Different from the traditional method of controlling the cooling fan by referring to the module fan control strategy, determining the specific first target air outlet temperature of each charging module by reliability evaluation can more accurately characterize the heat dissipation performance of each charging module and the impact of each charging module on the cabinet temperature of the charging equipment during operation. At the same time, the second target air outlet temperature for the charging equipment as a whole is calculated based on the first target air outlet temperature of each charging module. It can be specific to the target air outlet temperature level of each charging module, and more accurately characterize the temperature value that the charging equipment needs to reach under the current preset operating strategy, and use this as the data basis for controlling the cooling fan. The control of the cooling fan no longer needs to refer to the control strategy of each module fan, thereby effectively improving the control accuracy of the cooling fan in the charging equipment, and achieving the effect of taking into account both the cooling power utilization and the cooling effectiveness of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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 ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0044] Figure 1 A schematic diagram of the structure of a charging device provided in an embodiment of the present application;

[0045] Figure 2 A schematic diagram of a flow chart of a method for controlling heat dissipation of a charging device provided in an embodiment of the present application;

[0046] Figure 3 A schematic diagram of a process flow for initializing a cooling fan duty cycle in an actual application scenario provided by an embodiment of the present application;

[0047] Figure 4 A method provided in the embodiment of the present application Figure 3 The corresponding schematic diagram of the cooling fan duty cycle initialization process;

[0048] Figure 5 A schematic diagram of a flow chart of a method for determining a first target air outlet temperature provided in an embodiment of the present application;

[0049] Figure 6 A schematic diagram of a target air outlet temperature determination process is provided for an embodiment of the present application;

[0050] Figure 7 A schematic diagram of a flow chart of another method for controlling heat dissipation of a charging device provided in an embodiment of the present application;

[0051] Figure 8 A schematic diagram of the structure of a heat dissipation control device for a charging device provided in an embodiment of the present application;

[0052] Fig. 9 A schematic diagram of the structure of a charging device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of this application more clear, the following is a further detailed description of this application in combination with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments described in the embodiments of this application are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "include" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] See also Figure 1As shown in the figure, the schematic diagram of the charging device structure is combined for understanding. As described above, in the traditional heat dissipation control scheme for charging equipment, the control strategy for the heat dissipation fan needs to be determined based on the control strategy of each module fan. Since the control strategies of different module fans are pre-configured for the charging module and there are differences between the control strategies, this method may cause the heat dissipation fan power to be too large or too small, resulting in insufficient heat dissipation or waste of heat dissipation power. At present, the control accuracy of the heat dissipation fan in the charging equipment is poor.

[0056] In the traditional heat dissipation control solution, since the heat dissipation fan is completely regulated based on the operation strategy of the module fan, and the module fan regulation strategy is determined by its own output power demand, such a passive regulation strategy has the following problems:

[0057] (1) Due to the control reference of the cooling fan, when the operating air volume of the cooling fan is much higher than the air volume required by the charging equipment, there will be problems of heat dissipation power waste and excessive noise.

[0058] (2) Since the module fan needs to be regulated according to the external environment and its own input and output requirements, when there is a lot of dust accumulated on the fan filter inside the module fan, the heat dissipation fan cannot take timely response measures, resulting in poor heat dissipation of the charging equipment.

[0059] (3) Due to the differences in control strategies of module fans of different brands, when there are multiple module fans of different brands in the charging equipment, the regulation of the heat dissipation fan cannot be adapted to the module fans of different brands.

[0060] (4) Since the module fan control strategy is determined by its own output power demand, the cooling fan is prone to inaccurate control when referring to the module fan control strategy.

[0061] In order to solve the above problems, the embodiments of the present application provide a method, device, charging device and medium for controlling heat dissipation of a charging device. In the method, first, the charging instruction is responded to, and each charging module in the charging device is controlled to operate based on a preset operation strategy to obtain the specific temperature data of each charging module under the operation strategy. Subsequently, based on the actual temperature data of each charging module, combined with the target charging power indicated in the charging instruction and the ambient temperature parameters outside the charging device, the reliability of each charging module is evaluated to determine the first target air outlet temperature specific to each charging module, and on this basis, the first target air outlet temperature specific to each charging module is weighted and optimized, and then the second target air outlet temperature for the entire charging device is determined, so as to effectively control the duty cycle of the heat dissipation fan according to the second target air outlet temperature and the current air outlet temperature of the charging device.

[0062] Different from the traditional method of controlling the cooling fan by referring to the module fan control strategy, determining the specific first target air outlet temperature of each charging module by reliability evaluation can more accurately characterize the heat dissipation performance of each charging module and the impact of each charging module on the cabinet temperature of the charging equipment during operation. At the same time, the second target air outlet temperature for the charging equipment as a whole is calculated based on the first target air outlet temperature of each charging module. It can be specific to the target air outlet temperature level of each charging module, and more accurately characterize the temperature value that the charging equipment needs to reach under the current preset operating strategy, and use this as the data basis for controlling the cooling fan. The control of the cooling fan no longer needs to refer to the control strategy of each module fan, thereby effectively improving the control accuracy of the cooling fan in the charging equipment, and achieving the effect of taking into account both the cooling power utilization and the cooling effectiveness of the equipment.

[0063] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. 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 this application.

[0064] Next, the heat dissipation control method for a charging device provided in an embodiment of the present application will be introduced in conjunction with the accompanying drawings of specific embodiments. Figure 2 , which is a flow chart of a method for controlling heat dissipation of a charging device provided in an embodiment of the present application, and specifically includes the following steps:

[0065] S101: In response to a charging instruction, control each of the charging modules to operate based on a preset operation strategy to obtain temperature data of each of the charging modules; the charging instruction includes: a target charging power;

[0066] The host processor unit in the charging device responds to the charging instruction from the outside to control each charging module to operate based on its corresponding preset operation strategy, thereby obtaining the temperature data of each charging module under its specific operation strategy.

[0067] From the previous description, it can be seen that the control strategies of module fans of different brands will be different. Therefore, in order to accurately obtain the temperature data of each charging module during operation, it is necessary to determine the corresponding operation strategy based on the brand and model of each charging module, and use it to control the operation of each charging module. After the charging module runs for a period of time based on the preset operation strategy, the temperature data of each charging module is obtained to ensure the accuracy of the temperature data and eliminate the negative impact that different brands of charging modules may have on the accuracy of heat dissipation control.

[0068] Among them, the temperature data of the charging module includes the module air inlet temperature, module air outlet temperature and the temperature of key components in the module. These temperature data can be obtained through the temperature sensors (such as thermistors, NTC thermistors) configured inside the charging module. These sensors can monitor the temperature of the air inlet and outlet of the charging module in real time, as well as the temperature of key components in the module (such as power converters and batteries), and transmit the collected data to the host processor unit of the charging device through the communication interface (such as I2C, SPI) of the charging device.

[0069] In a possible implementation, before obtaining the temperature data of each charging module in this step, the heat dissipation fan in the charging device needs to be initialized to determine the initial duty cycle of the heat dissipation fan. In order to achieve more accurate duty cycle initialization for the heat dissipation fan according to the external ambient temperature conditions and the specific needs of the charging service, the embodiment of the present application pre-sets an initialization database, in which multiple types of data intervals are stored, each of which represents the combination of power demand and external ambient temperature, and each data interval corresponds to the initial duty cycle of the heat dissipation fan, so as to achieve accurate initialization processing according to actual charging needs and the external environment. Next, the process of initialization processing for the heat dissipation fan will be introduced in conjunction with the drawings of specific embodiments.

[0070] See also Figure 3 and Figure 4 , Figure 3 A schematic diagram of a process flow of initializing the duty cycle of a cooling fan in an actual application scenario provided by an embodiment of the present application, Figure 4 A method provided in the embodiment of the present application Figure 3 The corresponding cooling fan duty cycle initialization process diagram is as follows: Figure 4 The specific steps include:

[0071] S1011: Using the ambient temperature parameter and the target charging power as input data for initializing a database to determine a first duty cycle that matches the ambient temperature parameter and the target charging power;

[0072] S1012: Determine the first duty cycle as the initial duty cycle of the heat dissipation fan.

[0073] Combination Figure 3It is understood that when the charging device responds to the charging instruction, the current ambient temperature parameter and the target charging power indicated in the charging instruction can be obtained, and used as input data for initializing the database to determine the first duty cycle that matches the input data. Among them, the ambient temperature parameter is used to characterize the current external ambient temperature of the charging device, and the target charging power is usually included in the charging instruction. When the charging instruction is issued, the corresponding target charging power is often configured in the instruction, so the target charging power can be directly obtained from the external charging instruction.

[0074] By combining the external ambient temperature and the target charging power of the charging device itself, the temperature change of the charging device can be roughly estimated, thereby accurately determining the initial duty cycle of the cooling fan.

[0075] In the initialization database, multiple data intervals consisting of various collected data are configured. As described above, each data interval represents a combination of an ambient temperature parameter and a target charging power, and each interval corresponds to a specific duty cycle, which is the most suitable duty cycle in the data interval. Therefore, through the real-time collected ambient temperature parameters and target charging power, the first duty cycle that matches them can be screened out from the initialization database and used as the initial duty cycle of the cooling fan, so as to achieve accurate duty cycle initialization for the cooling fan.

[0076] The above is an introduction to obtaining the temperature data of the charging module and initializing the duty cycle of the cooling fan. Figure 2 , the heat dissipation control method of the above charging equipment is introduced:

[0077] S102: Performing reliability evaluation on each charging module according to the temperature data of each charging module, the target charging power and the ambient temperature parameter, so as to determine a first target air outlet temperature corresponding to each charging module.

[0078] In actual application scenarios, as the working hours accumulate, dust may accumulate on the module fan filter in the charging module. When there is a certain amount of dust accumulation in the filter, it will cause a certain amount of wind pressure loss in the charging module, reducing the heat dissipation capacity of the charging module.

[0079] Therefore, in order to determine the heat dissipation performance of each charging module, it is necessary to conduct a reliability evaluation on each charging module based on the module's inlet air temperature and outlet air temperature during operation, as well as the temperature of key components in the module, and combine the current target charging power and ambient temperature parameters to determine the heat dissipation performance of each charging module, and on this basis determine the first target outlet temperature corresponding to each charging module.

[0080] The core of reliability evaluation of charging modules is to evaluate whether there is loss in wind pressure of the charging modules, which is essentially to evaluate the reliability of heat dissipation performance of the charging modules. If there is no wind pressure loss in the charging module at this time, that is, the heat dissipation performance of the charging module is not affected, then the first target air outlet temperature corresponding to the charging module can be set to a lower value. Correspondingly, if the charging module has a certain wind pressure loss due to the accumulation of dust on the filter, it indicates that the heat dissipation performance of the charging module is poor, and its corresponding target air outlet temperature needs to be set to a higher value, so as to adjust the heat dissipation fan to a higher duty cycle, thereby ensuring the temperature stability of the charging equipment.

[0081] Next, the process of performing reliability evaluation on each charging module in step S102 to determine its corresponding first target air outlet temperature will be described in conjunction with the accompanying drawings of specific embodiments. Figure 5 and Figure 6 , Figure 5 A schematic diagram of a flow chart of a method for determining a first target air outlet temperature provided in an embodiment of the present application, Figure 6 A schematic diagram of a target air outlet temperature determination process is provided for an embodiment of the present application. Figure 6 In the schematic diagram shown, the left side of the figure represents the input data required for reliability evaluation of the charging module, namely, ambient temperature parameters, key component temperature, inlet temperature, outlet temperature and target charging power. Figure 6 Not all parameters involved are shown.

[0082] See also Figure 5 , which specifically includes the following steps:

[0083] S1021: Perform wind pressure loss analysis based on the module air inlet temperature, the module air outlet temperature and the temperature of the key components of each charging module to obtain a ventilation system status index of each charging module; the ventilation system status index is used to characterize the wind pressure loss of the ventilation system in the charging module.

[0084] The wind pressure loss analysis for the charging module needs to be determined by the temperature difference between the module inlet temperature and the module outlet temperature, as well as the difference between the temperature of the key components and the inlet temperature. The wind pressure loss analysis is performed based on these two temperature difference data, combined with the airflow path inside the module and the fan performance parameters.

[0085] Specifically, the wind pressure loss inside the charging module can be deduced through the specific size of the temperature difference. By comparing the actual wind pressure loss with the reference wind pressure loss value, a wind pressure loss index can be obtained, which is a ventilation system status indicator used to characterize the wind pressure loss of the ventilation system. In one possible implementation, the temperature rise index of the key component and the temperature rise index of the inlet and outlet air can be determined respectively for the temperature difference between the temperature of the key component and the inlet temperature, and the temperature difference between the inlet temperature and the outlet temperature, and the two can be combined to determine the ventilation system status indicator.

[0086] For example, when the temperature rise index of key components is too high (for example, more than 1.5), it may indicate that the heat dissipation inside the module is poor. The ventilation system status index can set the wind pressure loss degree to 50%, and it is necessary to check the installation of the heat sink or increase heat dissipation measures. Correspondingly, if the temperature difference index between the inlet and outlet air is too high (for example, more than 1.3), it may indicate that heat accumulates inside the module and the heat dissipation effect is poor. The ventilation system status index can set the wind pressure loss degree to 30%, which is not specifically limited in this embodiment.

[0087] S1022: Using the ventilation system status index, the target charging power and the ambient temperature parameter of each charging module as input data of the preset reliability evaluation curve corresponding to each charging module to determine the first target air outlet temperature of each charging module.

[0088] In the embodiment of the present application, each charging module has its corresponding preset reliability evaluation curve, which is used to characterize the corresponding relationship between the reliability of the charging module and the first target air outlet temperature, and can also be understood as the corresponding relationship between the wind pressure loss degree and the first target air outlet temperature. For example, when the wind pressure loss degree is 50%, the corresponding first target air outlet temperature can be set to 60 degrees, and when the wind pressure loss degree is 30%, the corresponding first target air outlet temperature can be set to 40 degrees.

[0089] In order to ensure the accuracy of the first target air outlet temperature as much as possible, on the basis of the ventilation system status index, the embodiment of the present application also needs to take the target charging power and the external ambient temperature parameters as part of the reference factors, so as to improve the calculation accuracy of the target air outlet temperature for each charging module.

[0090] Continue based on Figure 2 The following is an introduction to the embodiments of this application:

[0091] S103: Performing weighted optimization processing based on the first target air outlet temperature of each charging module to obtain a second target air outlet temperature for the charging device.

[0092] After calculating the first target air outlet temperature corresponding to each charging module, the first target air outlet temperature of each charging module is weighted and optimized. A separate weighting coefficient is assigned according to the ventilation system status index of each charging module and the importance of the charging module in the entire charging device. The weighted sum of the weighting coefficients assigned to each charging module and the first target air outlet temperature is weighted to obtain the second target air outlet temperature for the entire charging device.

[0093] S104: Controlling the duty cycle of the heat dissipation fan according to the second target air outlet temperature and the current air outlet temperature of the charging device.

[0094] Finally, according to the second target air outlet temperature calculated for the charging device as a whole and the actual current air outlet temperature of the charging device, the duty cycle of the cooling fan can be controlled according to the temperature difference between the two. Different from the traditional method of controlling the cooling fan by referring to the module fan control strategy, the second target air outlet temperature for the charging device as a whole is calculated based on the first target air outlet temperature of each charging module. It can be specific to the target air outlet temperature level of each charging module, more accurately characterizing the temperature value that the charging device needs to reach under the current preset operating strategy, and using this as the data basis for controlling the cooling fan. The control of the cooling fan no longer needs to refer to the control strategy of each module fan, thereby effectively improving the control accuracy of the cooling fan in the charging device, and achieving the effect of taking into account both the cooling power utilization and the cooling effectiveness of the equipment.

[0095] Specifically, the duty cycle control of the cooling fan needs to be completed by referring to the temperature difference between the second target air outlet temperature and the current air outlet temperature. The specific duty cycle control process is completed through the following two steps:

[0096] Step 1: determining a duty cycle control value for the heat dissipation fan according to a temperature difference between the second target air outlet temperature and the current air outlet temperature;

[0097] Step 2: adjusting the initial duty cycle of the heat dissipation fan by using the duty cycle control value to control the duty cycle of the heat dissipation fan.

[0098] In the embodiment of the present application, different temperature differences between the two correspond to different duty cycle control values. The embodiment of the present application needs to adjust the initial duty cycle of the heat dissipation fan according to the duty cycle control values ​​corresponding to different temperature differences, so as to realize the duty cycle control of the heat dissipation fan.

[0099] Here, the duty cycle after final regulation is set to ε, the initial duty cycle is ε0, and the duty cycle regulation value is Δε. Correspondingly, it can be determined that the duty cycle adjustment formula of the cooling fan is as follows:

[0100] ε=ε0+Δε

[0101] Furthermore, the second target air outlet temperature is set to T0, and the current air outlet temperature is ta. Then, the relationship between the duty cycle control value and the temperature difference is as follows:

[0102] When ta-T0<-20℃ Δε=-2;

[0103] When -20℃<ta-T0<-5℃ Δε=-1;

[0104] When -5℃<ta-T0<0℃ Δε=2;

[0105] When 0℃<ta-T0<15℃ Δε=2;

[0106] When 15℃<ta-T0 Δε=4;

[0107] It can be seen that according to different temperature differences between the second target air outlet temperature and the current air outlet temperature, different duty cycle control numbers can be determined, so that real-time control of the cooling fan duty cycle can be achieved, thereby ensuring the accuracy of control of the cooling fan duty cycle and achieving precise heat dissipation control of the charging equipment.

[0108] On the other hand, in actual application scenarios, if too much sediment accumulates on the air inlet filter in the charging device, the charging device will have problems with poor heat dissipation and ventilation. In this case, even if the duty cycle of the cooling fan is adjusted to 100%, it is still impossible to effectively reduce the temperature of the charging device, so the charging device needs to be maintained at this time. In order to ensure that the poor heat dissipation and ventilation of the charging equipment can be detected in time and corresponding treatment measures can be taken, in one possible implementation method, after the duty cycle of the cooling fan is adjusted to 100%, the current air outlet temperature of the charging device can be monitored in real time, and corresponding measures can be taken when the corresponding situation is detected, so as to implement poor heat dissipation early warning protection for the charging device. Next, the poor heat dissipation early warning protection process for the charging device will be introduced in conjunction with the drawings of specific embodiments, see. Figure 7 , which is a flow chart of another charging device heat dissipation control method provided in an embodiment of the present application, and specifically includes the following steps:

[0109] S201: When the current air outlet temperature of the charging device is greater than a preset first threshold, the duty cycle of the heat dissipation fan is adjusted to 100%, and the current air outlet temperature of the charging device is obtained after a preset first time period.

[0110] In the process of heat dissipation control of the charging device, it is necessary to monitor the current air outlet temperature of the charging device in real time. If the current air outlet temperature of the charging device is greater than the preset first threshold, it indicates that the current air outlet temperature of the charging device is too high. At this time, in order to ensure the equipment safety of the charging device, it is necessary to adjust the duty cycle of the heat dissipation fan to 100%, and re-acquire the current air outlet temperature of the charging device after the preset first time period to confirm whether the temperature of the charging device has dropped.

[0111] S202: If, after the preset first time period, the current air outlet temperature of the charging device is greater than the preset first threshold and less than the preset second threshold, the charging device is derated and an equipment maintenance signal is generated; the preset second threshold is greater than the preset first threshold.

[0112] Here, the preset first threshold is set to TA1, the preset second threshold is set to TA2, and the current air outlet temperature is ta. When the duty cycle of the cooling fan has been adjusted to 100%, after a certain period of time, if the current air outlet temperature of the charging device is greater than the preset first threshold and less than the preset second threshold, that is, TA2>ta>TA1, it indicates that the cooling fan in the charging device still has a certain heat dissipation function at this time, but it can only ensure that the air outlet temperature of the charging device does not rise sharply to a level exceeding TA2. In this case, it can be determined that the charging device has poor heat dissipation and ventilation, but since its cooling fan can still work, the charging device can be derated at this time, and an equipment maintenance signal can be generated to facilitate the staff to maintain the equipment after charging is completed.

[0113] S203: If the current air outlet temperature of the charging device is greater than the preset second threshold after the preset first time period has passed, the charging device is shut down and the device maintenance signal is generated.

[0114] Correspondingly, if after the preset first period of time, the current air outlet temperature of the charging device is greater than the preset second threshold, that is, ta>TA2, it means that the cooling fan at this time cannot prevent the temperature of the charging device from rising sharply, and it does not have the most basic heat dissipation function. At this time, the charging device needs to be shut down immediately to prevent the charging device from continuing to work and causing the temperature to be too high, and simultaneously generate an equipment maintenance signal to facilitate the staff to maintain the equipment.

[0115] The embodiment of the present application provides a method, device, charging device and medium for controlling heat dissipation of a charging device. In the method, first, the charging instruction is responded to, and each charging module in the charging device is controlled to operate based on a preset operation strategy to obtain specific temperature data of each charging module under the operation strategy. Subsequently, based on the actual temperature data of each charging module, combined with the target charging power indicated in the charging instruction and the ambient temperature parameters outside the charging device, the reliability of each charging module is evaluated to determine the first target air outlet temperature specific to each charging module, and on this basis, the first target air outlet temperature specific to each charging module is weighted and optimized, and then the second target air outlet temperature for the entire charging device is determined, so as to effectively control the duty cycle of the heat dissipation fan according to the second target air outlet temperature and the current air outlet temperature of the charging device.

[0116] Different from the traditional method of controlling the cooling fan by referring to the module fan control strategy, determining the specific first target air outlet temperature of each charging module by reliability evaluation can more accurately characterize the heat dissipation performance of each charging module and the impact of each charging module on the cabinet temperature of the charging equipment during operation. At the same time, the second target air outlet temperature for the charging equipment as a whole is calculated based on the first target air outlet temperature of each charging module. It can be specific to the target air outlet temperature level of each charging module, and more accurately characterize the temperature value that the charging equipment needs to reach under the current preset operating strategy, and use this as the data basis for controlling the cooling fan. The control of the cooling fan no longer needs to refer to the control strategy of each module fan, thereby effectively improving the control accuracy of the cooling fan in the charging equipment, and achieving the effect of taking into account both the cooling power utilization and the cooling effectiveness of the equipment.

[0117] A heat dissipation control device for a charging device provided in an embodiment of the present application is introduced below. The heat dissipation control device for a charging device described below and the heat dissipation control method for a charging device described above can refer to each other.

[0118] See also Figure 8 , which is a schematic diagram of the structure of a charging device heat dissipation control device provided in an embodiment of the present application, specifically including the following modules:

[0119] The data acquisition module 100 is used to control each charging module to operate based on a preset operation strategy in response to a charging instruction to obtain temperature data of each charging module; the charging instruction includes: a target charging power;

[0120] The reliability evaluation module 200 is used to perform reliability evaluation on each charging module according to the temperature data of each charging module, the target charging power and the ambient temperature parameter, so as to determine the first target air outlet temperature corresponding to each charging module;

[0121] A weighted optimization module 300, configured to perform weighted optimization processing based on the first target air outlet temperature of each charging module to obtain a second target air outlet temperature for the charging device;

[0122] The duty cycle control module 400 is used to control the duty cycle of the cooling fan according to the second target air outlet temperature and the current air outlet temperature of the charging device.

[0123] In a possible implementation, the temperature data includes: module inlet air temperature, module outlet air temperature and key component temperature; each charging module has a corresponding preset reliability evaluation curve;

[0124] The reliability evaluation module 200 is specifically used for:

[0125] Perform wind pressure loss analysis according to the module air inlet temperature, the module air outlet temperature and the temperature of the key components of each charging module to obtain a ventilation system status index of each charging module; the ventilation system status index is used to characterize the wind pressure loss of the ventilation system in the charging module;

[0126] The ventilation system status index, the target charging power and the environmental parameters of each charging module are used as input data of the preset reliability evaluation curve corresponding to each charging module to determine the first target air outlet temperature of each charging module.

[0127] In a possible implementation, the device further includes: an initialization module; the initialization module is specifically configured to:

[0128] Using the ambient temperature parameter and the target charging power as input data for initializing a database to determine a first duty cycle that matches the ambient temperature parameter and the target charging power;

[0129] The first duty cycle is determined as an initial duty cycle of the heat dissipation fan.

[0130] See also Fig. 9 , which is a schematic diagram of the structure of a charging device heat dissipation control electronic device provided in an embodiment of the present application, including:

[0131] A memory 11, used for storing computer programs;

[0132] The processor 12 is used to implement the steps of a charging device heat dissipation control method described in any of the above method embodiments when executing the computer program.

[0133] In this embodiment, the device may be a vehicle-mounted computer, a PC (Personal Computer), or a terminal device such as a smart phone, a tablet computer, a PDA, or a portable computer.

[0134] The device may include a memory 11 , a processor 12 , and a bus 13 .

[0135] Among them, the memory 11 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the device, such as a hard disk of the device. In other embodiments, the memory 11 can also be an external storage device of the device, such as a plug-in hard disk equipped on the device, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. Further, the memory 11 can also include both an internal storage unit of the device and an external storage device. The memory 11 can not only be used to store application software and various types of data installed in the device, such as program code for executing a heat dissipation control method for a charging device, but can also be used to temporarily store data that has been output or is to be output. The processor 12 can be a central processing unit (CPU) in some embodiments.

[0136] In some embodiments, the processor 12 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 11, such as executing program codes of a charging device heat dissipation control method.

[0137] The bus 13 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 9 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0138] Furthermore, the device may also include a network interface 14, which may optionally include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the device and other electronic devices.

[0139] Optionally, the device may further include a user interface 15, which may include a display (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 15 may also include a standard wired interface and a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode) touch device, etc. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the device and to display a visual user interface.

[0140] Fig. 9 Only the device with components 11-15 is shown, and it can be understood by those skilled in the art that Fig. 9 The structure shown does not constitute a limitation of the device, and may include fewer or more components than shown, or combine certain components, or arrange the components differently.

[0141] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, an embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the charging device heat dissipation control method as described in any of the above embodiments.

[0142] The computer-readable media of the embodiments of the present application include permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0143] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the charging device heat dissipation control method as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0144] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for methods, devices, charging equipment and media, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments. The methods, devices, charging equipment and media described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components indicated as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0145] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling heat dissipation of a charging device, characterized in that: Applied to a charging device, the charging device includes a plurality of charging modules and at least one heat dissipation fan, the method includes: In response to a charging instruction, each of the charging modules is controlled to operate based on a preset operation strategy to obtain temperature data of each of the charging modules; the charging instruction includes: a target charging power; Performing reliability evaluation on each charging module according to the temperature data of each charging module, the target charging power and the ambient temperature parameter to determine a first target air outlet temperature corresponding to each charging module; Performing weighted optimization processing based on the first target air outlet temperature of each charging module to obtain a second target air outlet temperature for the charging device; The duty cycle of the heat dissipation fan is controlled according to the second target air outlet temperature and the current air outlet temperature of the charging device.

2. The method according to claim 1, characterized in that The temperature data includes: module inlet air temperature, module outlet air temperature and key component temperature; each charging module has a corresponding preset reliability evaluation curve; The reliability evaluation of each charging module is performed according to the temperature data of each charging module, the target charging power and the ambient temperature parameter to determine the first target air outlet temperature corresponding to each charging module individually, including: Perform wind pressure loss analysis according to the module air inlet temperature, the module air outlet temperature and the temperature of the key components of each charging module to obtain a ventilation system status index of each charging module; the ventilation system status index is used to characterize the wind pressure loss of the ventilation system in the charging module; The ventilation system status index, the target charging power and the ambient temperature parameter of each charging module are used as input data of the preset reliability evaluation curve corresponding to each charging module to determine the first target air outlet temperature of each charging module.

3. The method according to claim 1, characterized in that Before obtaining the temperature data of each charging module, the method further includes: Using the ambient temperature parameter and the target charging power as input data for initializing a database to determine a first duty cycle that matches the ambient temperature parameter and the target charging power; The first duty cycle is determined as an initial duty cycle of the heat dissipation fan.

4. The method according to claim 3, characterized in that The controlling the duty cycle of the heat dissipation fan according to the second target air outlet temperature and the current air outlet temperature of the charging device includes: Determining a duty cycle control value for the heat dissipation fan according to a temperature difference between the second target air outlet temperature and the current air outlet temperature; The initial duty cycle of the heat dissipation fan is adjusted by the duty cycle control value to control the duty cycle of the heat dissipation fan.

5. The method according to claim 1, characterized in that After controlling the duty cycle of the heat dissipation fan according to the second target air outlet temperature and the current air outlet temperature of the charging device, the method further includes: When the current air outlet temperature of the charging device is greater than a preset first threshold, adjusting the duty cycle of the heat dissipation fan to 100%, and obtaining the current air outlet temperature of the charging device after a preset first time period; If, after the preset first time period, the current outlet air temperature of the charging device is greater than the preset first threshold and less than the preset second threshold, the charging device is derated and a device maintenance signal is generated; the preset second threshold is greater than the preset first threshold; If the current air outlet temperature of the charging device is greater than the preset second threshold after the preset first time period has passed, the charging device is shut down and the device maintenance signal is generated.

6. A heat dissipation control device for a charging device, characterized in that: Applied to a charging device, the charging device includes a plurality of charging modules and at least one heat dissipation fan, and the system includes: A data acquisition module, for controlling each of the charging modules to operate based on a preset operation strategy in response to a charging instruction, so as to acquire temperature data of each of the charging modules; the charging instruction includes: a target charging power; a reliability evaluation module, configured to perform reliability evaluation on each charging module according to the temperature data of each charging module, the target charging power and the ambient temperature parameter, so as to determine a first target air outlet temperature corresponding to each charging module; a weighted optimization module, configured to perform weighted optimization processing based on the first target air outlet temperature of each charging module to obtain a second target air outlet temperature for the charging device; A duty cycle control module is used to control the duty cycle of the cooling fan according to the second target air outlet temperature and the current air outlet temperature of the charging device.

7. The device according to claim 6, characterized in that The temperature data includes: module inlet air temperature, module outlet air temperature and key component temperature; each charging module has a corresponding preset reliability evaluation curve; The reliability evaluation module is specifically used for: Perform wind pressure loss analysis according to the module air inlet temperature, the module air outlet temperature and the temperature of the key components of each charging module to obtain a ventilation system status index of each charging module; the ventilation system status index is used to characterize the wind pressure loss of the ventilation system in the charging module; The ventilation system status index, the target charging power and the environmental parameters of each charging module are used as input data of the preset reliability evaluation curve corresponding to each charging module to determine the first target air outlet temperature of each charging module.

8. The device according to claim 6, characterized in that The device further includes: an initialization module; the initialization module is specifically configured to: Using the ambient temperature parameter and the target charging power as input data for initializing a database to determine a first duty cycle that matches the ambient temperature parameter and the target charging power; The first duty cycle is determined as an initial duty cycle of the heat dissipation fan.

9. A charging device, characterized in that: The device comprises: a processor, a memory and a system bus; The processor and the memory are connected via the system bus; The memory is used to store one or more programs, and the one or more programs include instructions. When the instructions are executed by the processor, the processor executes the charging device heat dissipation control method according to any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the heat dissipation control method for a charging device described in any one of claims 1 to 5 is implemented.

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