Charging pile and fan speed regulation and noise reduction method and system

Abstract

The invention belongs to the technical field of charging piles, and particularly relates to a charging pile and a fan speed regulation and noise reduction method and system. Comprising the steps that (1) a current maximum noise limit value is obtained, the maximum rotating speed corresponding to the current maximum noise limit value is determined in combination with a noise-rotating speed curve, the rotating speed of an air inlet fan of the charging pile is controlled not to exceed the maximum rotating speed, and the power of a charging module of the charging pile is adjusted according to the maximum rotating speed; and (2) the current air outlet temperature of the charging pile is determined, the current air outlet fan rotating speed is determined in combination with the temperature-rotating speed curve, and the air outlet fan of the charging pile is controlled to operate according to the determined current air outlet fan rotating speed. The temperature of the charging pile is kept within the safe temperature range, low-noise safe and stable operation of the charging pile is guaranteed, and low temperature and low noise can be both considered.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of charging piles, and particularly relates to a charging pile, a fan speed regulation and noise reduction method and system. BACKGROUND

[0002] With the continuous development of the electric vehicle industry, supporting charging facilities are also accelerating construction. Public direct current fast charging equipment is the main product put into the market, which can meet the rapid power supply needs of electric vehicle owners. However, the direct current fast charging equipment will generate heat during charging, and the equipment needs to be equipped with a fan for heat dissipation. The noise generated by the heat dissipation fan will affect the residents near the charging station.

[0003] The size of the noise of the charging pile is related to the speed of the heat dissipation fan and the charging power of the charging module in the charging pile. Generally, the greater the charging power, the higher the heat, and the greater the speed of the heat dissipation fan required. The greater the speed of the heat dissipation fan, the greater the noise. At present, in order to maintain a safe temperature during operation, the heat dissipation fan usually operates at the maximum speed during operation, resulting in a continuously large noise during operation of the charging pile, causing noise complaints from nearby residents.

[0004] In order to solve the above problems, a method for adjusting the speed of the fan of the charging pile according to the noise limit value is proposed in Chinese patent application CN113829915A. The method adjusts the speed of the fan of the charging pile to not exceed the first speed to ensure that the noise does not exceed the limit value. Although the noise is reduced, the heat dissipation efficiency of the charging pile is also reduced. When the charging power of the charging pile is too high, the heat dissipation is not timely, and safety hazards may still occur. SUMMARY

[0005] The purpose of the present application is to provide a charging pile, a fan speed regulation and noise reduction method and system to solve the technical problem that the noise and temperature cannot be considered simultaneously in the prior art during operation of the charging pile.

[0006] To solve the above technical problems, the present application provides a charging pile fan speed regulation and noise reduction method, comprising: 1) Obtain the current maximum noise limit value, determine the maximum speed corresponding to the current maximum noise limit value in combination with the noise-speed curve, control the fan speed of the air inlet of the charging pile to not exceed the maximum speed, and adjust the power of the charging module of the charging pile according to the maximum speed; 2) Determine the temperature of the air outlet of the charging pile, determine the current air outlet fan speed in combination with the temperature-speed curve, and control the air outlet fan of the charging pile to operate at the determined current air outlet fan speed.

[0007] Further, it further comprises: The specific method for adjusting the charging module power of the charging pile according to the maximum rotating speed is: determining the maximum power corresponding to the maximum rotating speed by using the maximum rotating speed and the rotating speed-power curve, and controlling the charging module power of the charging pile to operate without exceeding the maximum power.

[0008] Further, the current maximum noise limit is determined based on the received daily noise reduction curve and the current time.

[0009] Further, the rotating speeds of the inlet fan and the outlet fan of the charging pile are both adjusted by adjusting the duty cycle of the input PWM wave.

[0010] To solve the above technical problems, the application provides a charging pile fan speed regulation and noise reduction system, which comprises a control module and a temperature sampling module for sampling the inlet temperature and the outlet temperature of the charging pile; the control module is provided with a noise-rotating speed curve and a temperature-rotating speed curve, is used to obtain a current maximum noise limit, determine a maximum rotating speed corresponding to the current maximum noise limit in combination with the noise-rotating speed curve, control the rotating speed of the inlet fan of the charging pile to operate without exceeding the maximum rotating speed, and adjust the charging module power of the charging pile according to the maximum rotating speed; the control module is also used to determine a current outlet fan rotating speed in combination with the temperature-rotating speed curve according to the current outlet temperature of the charging pile sampled by the temperature sampling module, and control the outlet fan of the charging pile to operate according to the determined current outlet fan rotating speed.

[0011] Further, the control module is also provided with a rotating speed-power curve, and the specific method for adjusting the charging module power of the charging pile according to the maximum rotating speed is: determining the maximum power corresponding to the maximum rotating speed by using the maximum rotating speed and the rotating speed-power curve, and controlling the charging module power of the charging pile to operate without exceeding the maximum power.

[0012] Further, the control module is connected to an upper controller through a data transmission module to obtain a daily noise reduction curve, and determines the current maximum noise limit in combination with the current time.

[0013] Further, the noise reduction system further comprises a fan speed regulation module, which is used to adjust the rotating speeds of the inlet fan and the outlet fan of the charging pile by adjusting the duty cycle of the PWM wave.

[0014] Further, the data transmission module is connected to the upper controller through 485 communication.

[0015] To solve the above technical problems, the application further provides a charging pile, comprising a charging module, a charging pile air outlet fan and a charging pile air inlet fan, and further comprising a charging pile fan speed regulation and noise reduction system, comprising: a control module and a temperature sampling module for sampling the air inlet temperature and the air outlet temperature of the charging pile; the control module is provided with a noise-speed curve and a temperature-speed curve, the control module is used to obtain the current maximum noise limit value, determine the maximum speed corresponding to the current maximum noise limit value in combination with the noise-speed curve, control the air inlet fan speed of the charging pile to run at no more than the maximum speed, and adjust the power of the charging module of the charging pile according to the maximum speed; the control module is further used to determine the current air outlet fan speed in combination with the temperature-speed curve according to the current air inlet temperature and / or air outlet temperature of the charging pile sampled by the temperature sampling module, and control the air outlet fan of the charging pile to run at the determined current air outlet fan speed.

[0016] Further, the control module is further provided with a speed-power curve, and the specific method for adjusting the power of the charging module of the charging pile according to the maximum speed is to determine the maximum power corresponding to the maximum speed by using the maximum speed and the speed-power curve, and control the power of the charging module of the charging pile to run at no more than the maximum power.

[0017] Further, the control module is connected to an upper controller through a data transmission module to obtain a daily noise reduction curve and determine the current maximum noise limit value in combination with the current time.

[0018] Further, the noise reduction system further comprises a fan speed regulation module, which is used to adjust the speed of the air inlet fan and the air outlet fan of the charging pile by adjusting the duty cycle of the PWM wave.

[0019] Further, the data transmission module is connected to the upper controller through 485 communication.

[0020] The application is an improved invention, and has the following beneficial effects: the charging pile, the fan speed regulation and noise reduction method and the system can determine the maximum speed of the air inlet fan based on the maximum noise limit value at the current time, ensure that the noise will not exceed the maximum noise limit value when the air inlet fan cools the charging module, and the power of the charging module can also be adjusted based on the maximum speed of the air inlet fan, so that the heat generated by the charging module is also reduced, the temperature of the air inlet fan and the air outlet fan is not too high, the speed of the air outlet fan is adjusted based on the temperature of the air inlet and the air outlet, the speed does not need to be too large, and the running noise is small; the temperature of the charging pile is maintained within a safe temperature range, the low-noise safe and stable operation of the charging pile is ensured, and low temperature and low noise can be considered. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the charging pile fan speed regulation and noise reduction system of the application. DETAILED DESCRIPTION

[0022] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments.

[0023] Charging pile implementation: The charging pile of the present application comprises a charging module, a charging pile air outlet fan, a charging pile air inlet fan and a charging pile fan speed regulation and noise reduction system. The charging module is used for charging vehicles. The charging pile fan speed regulation and noise reduction system comprises a data transmission module, a temperature sampling module, a control module and a fan speed regulation module. The temperature sampling module is used for sampling the air outlet temperature of the charging pile. The control module is provided with a noise-speed curve and a temperature-speed curve, the control module is used for obtaining the current maximum noise limit value, combining the noise-speed curve to determine the maximum speed corresponding to the current maximum noise limit value, and controlling the air inlet fan speed of the charging pile to run at no more than the maximum speed; the control module is also used for determining the air outlet temperature of the current charging pile, combining the temperature-speed curve to determine the current air outlet fan speed, and controlling the air outlet fan of the charging pile to run according to the determined current air outlet fan speed. The control module is also provided with a speed-power curve, and the control module is also used for determining the maximum power corresponding to the maximum speed by using the maximum speed and the speed-power curve, and controlling the power of the charging module of the charging pile to run at no more than the maximum power.

[0024] For the convenience of description, in the present embodiment, as shown in Figure 1 The charging pile fan speed regulation and noise reduction system is divided into a charging pile noise reduction control unit (used for controlling the air outlet fan of the charging pile, referred to as the charging pile speed regulation fan in the figure) and a charging module noise reduction control unit (used for controlling the air inlet fan of the charging pile, referred to as the charging module speed regulation fan in the figure) according to the different control objects of the air inlet fan control and the outlet fan control. And the control module, the fan speed regulation module and the data transmission model are all divided into two, respectively into two control units.

[0025] The charging pile noise reduction control unit comprises a data transmission module, a fan speed regulation module, a control module and a temperature sampling module.

[0026] The data transmission module of the charging pile noise reduction control unit is used for connecting the upper controller and the control module; in the present embodiment, the data transmission module and the upper controller are connected by 485 communication to receive the daily noise reduction curve issued by the upper controller and send it to the control module.

[0027] The temperature sampling module is used to connect the temperature probe of the air outlet of the charging machine to obtain the change of the temperature of the air outlet of the charging machine and send it to the control module. In the embodiment, the temperature probe of the air outlet of the charging machine adopts a PT1000 temperature sensor, and the sampling module can further convert the temperature value of the sampling point according to the resistance value of the surrounding environment.

[0028] The speed-adjustable fan of the charging machine is an air outlet fan of the charging pile, which is installed at the air outlet of the charging pile and used to dissipate the heat generated during the operation of the charging pile. The speed of the fan can be adjusted by the fan speed-adjusting module.

[0029] The control module of the noise-reducing control unit of the charging pile is provided with a temperature-speed curve, and the corresponding speed signal is sent to the fan speed-adjusting module according to the temperature of the air outlet of the charging pile collected by the temperature sampling module.

[0030] In the embodiment, the control module of the noise-reducing control unit of the charging pile also receives and stores the daily noise-reducing curve received from the host computer by the data transmission module, and sends the curve to the noise-reducing control unit of the charging module through the data transmission module.

[0031] The fan speed-adjusting module is used to adjust the speed of the speed-adjustable fan of the charging machine according to the speed signal corresponding to the temperature of the air outlet sent by the control module. In the embodiment, the fan speed-adjusting module adjusts the duty cycle of the PWM wave and inputs it to the speed-adjustable fan of the charging machine to realize the speed adjustment of the speed-adjustable fan of the charging machine. The higher the duty cycle of the PWM wave, the faster the speed, and the stronger the heat dissipation effect.

[0032] The noise-reducing control unit of the charging module includes a data transmission module, a control module and a fan speed-adjusting module (not shown in the figure).

[0033] The data transmission module of the noise-reducing control unit of the charging module is used to receive the daily noise-reducing curve and send it to the control module of the noise-reducing control unit of the charging module. In the embodiment, it receives the daily noise-reducing curve from the data transmission module of the noise-reducing control unit of the charging pile through CAN communication. In other embodiments, the data transmission module of the noise-reducing control unit of the charging module can also be directly connected to the upper controller to receive the daily noise-reducing curve from the upper controller. The communication mode between the data transmission module and the upper controller can be 485 communication.

[0034] The control module of the charging module noise reduction control unit is provided with a noise-speed curve, based on which and a daily noise reduction curve, the maximum speed of the current period is determined, and the speed of the charging module speed-regulated fan is controlled not to exceed the maximum speed. The daily noise reduction curve is a maximum noise limit variation curve for 24 hours of a day. The control module of the charging module noise reduction control unit is also provided with a speed-power curve, based on which and the maximum speed of the current period, the maximum power of the current charging module is determined, and the charging power of the charging module is controlled not to exceed the maximum power.

[0035] The charging module speed-regulated fan, also known as the charging pile air inlet fan, is arranged at the front of the charging module, can suck air outside the pile body, cool and dissipate heat for the charging module, and has a speed-regulating function. In this embodiment, the speed of the charging module speed-regulated fan is adjusted by the duty cycle of the PWM wave regulated by the fan speed-regulating module. The higher the duty cycle of the PWM wave, the faster the speed, the stronger the heat dissipation effect, and the greater the noise.

[0036] Based on the above charging pile fan speed-regulating and noise-reducing system, the fan speed-regulating and noise-reducing method is as follows: 1) The data transmission module of the charging pile noise reduction control unit acquires the daily noise reduction curve from the upper controller through 485 communication and sends it to the data transmission module of the charging module noise reduction control unit through CAN communication; the data transmission module of the charging module noise reduction control unit sends the daily noise reduction curve to the control module of the charging module noise reduction control unit; and adjusts the power of the charging module of the charging pile according to the maximum speed; The power adjustment method of the charging module is as follows: the control module of the charging module noise reduction control unit determines the maximum noise limit value of the current time period according to the daily noise reduction curve, obtains the maximum speed of the current time period in combination with the noise-speed curve, and controls the speed of the charging pile air inlet fan not to exceed the maximum speed to run, so that the noise during running does not exceed the maximum noise limit value; the control module also determines the maximum power of the charging module according to the maximum speed and the speed-power curve, and controls the power of the charging module not to exceed the maximum power to run, so as to ensure that the heat generated by the charging module does not exceed the heat dissipation efficiency when the air inlet fan runs at the maximum speed, and to ensure the safety of the charging module; as another embodiment, the charging module in the charging pile can also adjust its output power adaptively according to the speed of the charging pile air inlet fan. When the speed of the charging pile air inlet fan is reduced, the power of the charging module will also be adaptively reduced, so that the heat will also be reduced; 2) The temperature sampling module of the charging pile noise reduction control unit collects the temperature of the charging pile air outlet and sends it to the control module of the charging pile noise reduction control unit. The control module determines the speed of the air outlet fan in combination with the temperature of the charging pile air outlet and the temperature-speed curve, controls the charging pile air outlet fan to run at the speed, and ensures that the temperature of the charging pile is kept within a safe range.

[0037] Charging pile fan speed regulation and noise reduction system implementation: The charging pile fan speed regulation and noise reduction system comprises a data transmission module, a temperature sampling module, a control module and a fan speed regulation module. The temperature sampling module is used to sample the outlet temperature of the charging pile. The control module is provided with a noise-speed curve and a temperature-speed curve. The control module is used to obtain the current maximum noise limit value, determine the maximum speed corresponding to the current maximum noise limit value in combination with the noise-speed curve, control the inlet fan speed of the charging pile to run at no more than the maximum speed, and determine the current outlet fan speed of the charging pile in combination with the temperature-speed curve. The control module is also used to control the outlet fan of the charging pile to run at the determined current outlet fan speed. The control module is also provided with a speed-power curve. The control module is also used to determine the maximum power corresponding to the maximum speed by using the maximum speed and the speed-power curve, and control the charging module power of the charging pile to run at no more than the maximum power. The fan speed regulation module is used to adjust the speed of the inlet fan and the outlet fan of the charging pile by adjusting the duty cycle of the PWM wave. The control module is used to connect the upper controller through the data transmission module to obtain the daily noise reduction curve, and determine the current maximum noise limit value in combination with the current time.

[0038] Charging pile fan speed regulation and noise reduction method implementation: The charging pile fan speed regulation and noise reduction method of the present application comprises: 1) Obtain the current maximum noise limit value, determine the maximum speed corresponding to the current maximum noise limit value in combination with the noise-speed curve, control the inlet fan speed of the charging pile to run at no more than the maximum speed, and adjust the charging module power of the charging pile at the maximum speed. The specific power adjustment method is as follows: determine the current outlet temperature of the charging pile, determine the current outlet fan speed in combination with the temperature-speed curve, and control the outlet fan of the charging pile to run at the determined current outlet fan speed. As another implementation, the charging module in the charging pile can also adjust its output power adaptively according to the speed of the inlet fan of the charging pile. When the speed of the inlet fan of the charging pile is reduced, the power of the charging module will also be reduced adaptively, so that the heat will also be reduced. In this embodiment, in order to ensure that the temperature of the charging pile does not become too high, not only is the speed of the outlet fan adjusted according to the outlet temperature to improve the heat dissipation efficiency, but also the power of the charging module is adjusted according to the maximum speed to reduce the heat generation from the source, thereby ensuring the safe operation of the charging pile. The specific method is as follows: 2) Determine the maximum power corresponding to the maximum speed by using the maximum speed and the speed-power curve, and control the charging module power of the charging pile to run at no more than the maximum power.

[0039] In the embodiment, the current maximum noise limit is determined based on the current time and an acquired daily noise reduction curve, which is a maximum noise limit variation curve for 24 hours in a day. The rotation speeds of the inlet fan and the outlet fan of the charging pile are both adjusted by adjusting the duty cycle of the input PWM wave.

[0040] In summary, the charging pile fan speed regulation and noise reduction method can determine the maximum rotation speed of the inlet fan based on the maximum noise limit at the current time, ensure that the noise does not exceed the maximum noise limit when the inlet fan cools the charging module, adjust the charging power of the charging module based on the maximum rotation speed of the inlet fan, so that the heat generated by the charging module does not exceed the heat dissipation of the inlet fan too much, the temperature of the inlet and outlet is low, the rotation speed of the outlet fan is adjusted based on the temperature of the inlet and outlet, the rotation speed does not need to be too large, and the running noise is small; ensure that the temperature of the charging pile is maintained within a safe temperature range at this time, and realize the safe and stable operation of the charging pile with low noise.

Claims

1. A method for speed regulation and noise reduction of a charging pile fan, characterized in that, include: 1) Obtain the current maximum noise limit, combine it with the noise-speed curve, determine the maximum speed corresponding to the current maximum noise limit, control the speed of the air inlet fan of the charging pile to not exceed the maximum speed, and adjust the power of the charging module of the charging pile according to the maximum speed. 2) Determine the current air outlet temperature of the charging pile, and based on the temperature-speed curve, determine the current air outlet fan speed, and control the air outlet fan of the charging pile to operate at the determined current air outlet fan speed.

2. The method for speed regulation and noise reduction of charging pile fans according to claim 1, characterized in that, Also includes: The specific method for adjusting the charging module power of the charging pile according to the maximum speed is as follows: using the maximum speed and the speed-power curve, determine the maximum power corresponding to the maximum speed, and control the charging module power of the charging pile to operate without exceeding the maximum power.

3. The method for speed regulation and noise reduction of charging pile fans according to claim 1, characterized in that, The current maximum noise limit is determined based on the received daily noise reduction curve and the current time.

4. The method for speed regulation and noise reduction of charging pile fans according to claim 1, characterized in that, The speeds of the air inlet and outlet fans of the charging pile are adjusted by regulating the duty cycle of the input PWM wave.

5. A charging pile fan speed regulation and noise reduction system, characterized in that, include: The control module and the temperature sampling module for sampling the inlet and outlet temperatures of the charging pile; The control module is equipped with a noise-speed curve and a temperature-speed curve. The control module is used to obtain the current maximum noise limit, and in combination with the noise-speed curve, determine the maximum speed corresponding to the current maximum noise limit, control the speed of the charging pile's air inlet fan to not exceed the maximum speed, and adjust the charging module power of the charging pile according to the maximum speed. The control module is also used to determine the current air outlet fan speed based on the current air outlet temperature of the charging pile sampled by the temperature sampling module, and in combination with the temperature-speed curve, and control the charging pile's air outlet fan to operate at the determined current air outlet fan speed.

6. The charging pile fan speed regulation and noise reduction system according to claim 5, characterized in that, The control module is also equipped with a speed-power curve. The specific method for adjusting the charging module power of the charging pile according to the maximum speed is to use the maximum speed and the speed-power curve to determine the maximum power corresponding to the maximum speed, and control the charging module power of the charging pile to operate without exceeding the maximum power.

7. The charging pile fan speed regulation and noise reduction system according to claim 5, characterized in that, The control module connects to the upper-level controller via the data transmission module to obtain the daily noise reduction curve and determines the current maximum noise limit in conjunction with the current time.

8. The charging pile fan speed regulation and noise reduction system according to claim 5, characterized in that, The noise reduction system also includes a fan speed control module, which is used to adjust the speed of the inlet fan and outlet fan of the charging pile by adjusting the duty cycle of the PWM wave.

9. The charging pile fan speed regulation and noise reduction system according to claim 7, characterized in that, The data transmission module is used to connect to the upper-level controller via 485 communication.

10. A charging pile, comprising a charging module, a charging pile outlet fan, and a charging pile inlet fan, characterized in that... It also includes the charging pile fan speed regulation and noise reduction system as described in any one of claims 5-9.

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