Heat dissipation control method and charging equipment

Abstract

The invention provides a heat dissipation control method and charging equipment. The charging equipment comprises a power output end, a controller, a power circuit and a heat dissipation device. The power output end is used for being electrically connected with power receiving equipment. The controller is used for communicating with the powered device and acquiring a charging state signal of the powered device. The power supply circuit is electrically connected with the controller and the power supply output end respectively; the power supply circuit is used for outputting a charging voltage to the power supply output end so as to charge a powered device; the controller is used for controlling the working state of the power circuit according to the charging state signal. The heat dissipation device is electrically connected with the controller; the controller is further used for controlling the working state of the heat dissipation device according to the charging state signal. According to the invention, heat dissipation is carried out while the charging equipment charges the powered equipment through the heat dissipation device according to the current charging state, and the heat dissipation effect is good.

Description

Technical Field

[0001] This application relates to the field of charging, and more particularly to a heat dissipation control method and a charging device. Background Technology

[0002] Charging facilities generate heat during the charging process. Poor heat dissipation can lead to overheating, resulting in decreased charging efficiency and unstable charging, and in more serious cases, damage to electronic components. Therefore, a good heat dissipation design is crucial to ensuring the normal operation and safety of charging facilities. Summary of the Invention

[0003] To address the problems in the prior art, this application provides a heat dissipation control method and a charging device to improve charging efficiency.

[0004] This application provides a charging device, the charging device comprising:

[0005] The power output terminal is used for electrical connection to the powered device.

[0006] The controller is used to communicate with the powered device and to acquire the charging status signal of the powered device;

[0007] A power supply circuit is electrically connected to the controller and the power output terminal, respectively; the power supply circuit is used to output a charging voltage to the power output terminal to charge the powered device; the controller is used to control the operating state of the power supply circuit according to the charging status signal.

[0008] A heat dissipation device is electrically connected to the controller; the controller is also used to control the operating state of the heat dissipation device according to the charging status signal.

[0009] In one embodiment, the heat dissipation device is a fan, and the controller controls the working state of the heat dissipation device by controlling the fan to turn on, controlling the fan to turn off, and adjusting the fan speed.

[0010] In one embodiment, the charging status signal includes a control guidance status signal according to standard IEC 61851.

[0011] In one embodiment, the controller is used to decode and convert the control guidance status signal and output a control signal; the control signal is used to control the operating state of the fan.

[0012] In one embodiment, when the voltage of the control guidance state signal is within a first voltage range, the lower the voltage of the control guidance state signal, the higher the speed of the fan.

[0013] In one embodiment, the controller is configured to control the fan to operate at a first speed when the voltage of the control guidance state signal is within a second voltage range; the second voltage range is smaller than the first voltage range.

[0014] In one embodiment, the controller is configured to operate at a second rotational speed when the voltage of the control guidance state signal is within a third voltage range; the third voltage range is smaller than the second voltage range.

[0015] In one embodiment, the charging device further includes a temperature detection device;

[0016] The temperature detection device is located inside the charging equipment; the temperature detection device is used to detect the operating temperature inside the charging equipment.

[0017] The controller is further configured to control the heat dissipation device to dissipate heat when the operating temperature is greater than a first preset temperature; and to control the heat dissipation device to stop dissipating heat when the operating temperature is less than a second preset temperature; wherein the second preset temperature is less than the first preset temperature.

[0018] This application also proposes a heat dissipation control method applied to a charging device, the charging device including a heat dissipation device, the charging device being used to communicate with a powered device, the heat dissipation control method comprising:

[0019] Obtain the charging status signal of the powered device;

[0020] The operating state of the heat dissipation device is controlled according to the charging status signal.

[0021] In one embodiment, the charging status signal includes a control guidance status signal according to standard IEC 61851.

[0022] This application uses a controller to obtain a charging status signal to determine the current charging state, and then controls the operation of the power supply circuit. Simultaneously, the controller can control the operation of a heat dissipation device based on this charging status signal. In this way, the heat dissipation device can dissipate heat while the charging device is charging the receiving device, achieving good heat dissipation. The heat dissipation device can be activated before the internal temperature of the charging device rises, maintaining the temperature within a suitable range, allowing the electronic components inside the charging device to operate at an appropriate temperature, thus improving charging efficiency. Attached Figure Description

[0023] Figure 1 This is a module structure diagram of an embodiment of the charging device of this application.

[0024] Figure 2 This is a schematic diagram illustrating the connection between the charging device and the receiving device according to an embodiment of this application.

[0025] Figure 3 This is a flowchart of an embodiment of the heat dissipation control method of this application.

[0026] Explanation of main component symbols

[0027] Charging device 100 Power output terminal 110

[0028] Controller 120 Power supply circuit 130

[0029] Heat dissipation device 140 Electrical receiving equipment 200

[0030] Temperature detection device 150; Current detection circuit 160

[0031] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0032] The following description will refer to the accompanying drawings to provide a more complete picture of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0033] Reference Figure 1 and Figure 2 This application discloses a charging device 100, which includes a power output terminal 110, a controller 120, a power circuit 130, and a heat dissipation device 140. The power output terminal 110 is electrically connected to a powered device 200. The controller 120 communicates with the powered device 200 and acquires a charging status signal from the powered device 200. The power circuit 130 is electrically connected to both the controller 120 and the power output terminal 110; the power circuit 130 outputs a charging voltage to the power output terminal 110 to charge the powered device 200; the controller 120 controls the operating state of the power circuit 130 according to the charging status signal. The heat dissipation device 140 is electrically connected to the controller 120; the controller 120 also controls the operating state of the heat dissipation device 140 according to the charging status signal.

[0034] In this embodiment, the power output terminal 110 can be physically connected to the powered device 200 for communication and power transmission. The controller 120 can control the power circuit 130 to output a supply voltage to power / charge the powered device 200. The controller 120 can also control the heat dissipation device 140 to operate according to the working state of the charging device 100. The input terminal of the power circuit 130 can be connected to the power grid, converting the grid power into a supply voltage and outputting it to the powered device 200 for charging. The heat dissipation device 140 can be disposed inside or outside the charging device 100 near the heat-generating element (e.g., the controller 120, the power circuit 130, the power conversion circuit, etc.). For example, the charging device 100 also includes a housing with an accommodating cavity, in which the controller 120 and the power circuit 130 are disposed. The heat-generating element is disposed inside the housing near one side wall of the housing, and the heat dissipation device 140 can be disposed outside the housing near this side wall to help the heat-generating element dissipate heat better and keep the temperature inside the accommodating cavity within a suitable range. The charging device 100 can be a charging pile, energy storage device, etc. The controller 120 can be implemented using chips with control functions such as microprocessors and FPGAs. The power supply circuit 130 can be implemented using MOSFETs, relays, buck circuits, etc. The heat dissipation device 140 can be implemented using fans, condensers, etc.

[0035] Taking charging device 100 as a charging pile and receiving device 200 as an electric vehicle as an example, the power output terminal 110 can be a charging gun. The power output terminal 110 is not physically connected to the electric vehicle, and the charging pile is in an idle state. At this time, the controller 120 can obtain a charging status signal representing the idle state, control the main switch in the power circuit 130 to remain open, and simultaneously control the heat dissipation device 140 to remain in standby mode.

[0036] The power output terminal 110 is connected to the electric vehicle, but the charging station has not yet started charging. At this time, the controller 120 obtains a charging status signal indicating that the connection has been made but charging has not yet started. The controller power circuit 130 outputs a smaller supply voltage according to the charging needs of the electric vehicle, and at the same time controls the heat dissipation device 140 to operate with a small heat dissipation power.

[0037] The power output terminal 110 is connected to an electric vehicle, and the charging station is charging the electric vehicle with a relatively low charging power. At this time, the controller 120 obtains a charging status signal indicating a low charging power, controls the power supply circuit 130 to output a higher supply voltage according to the charging needs of the electric vehicle, and simultaneously controls the heat dissipation device 140 to operate with a relatively low heat dissipation power.

[0038] The power output terminal 110 has been connected to multiple electric vehicles, and the charging pile is charging these vehicles at a high charging power. At this time, the controller 120 receives a charging status signal indicating a high charging power, controls the main switch in the power circuit 130 to remain closed, and simultaneously controls the heat dissipation device 140 to operate at a high heat dissipation power.

[0039] A connection error occurs between the power output terminal 110 and the electric vehicle, causing charging to pause. At this time, the controller 120 receives a charging status signal indicating the connection error, controls the main switch in the power circuit 130 to remain open, and simultaneously controls the heat dissipation device 140 to operate at a lower heat dissipation power.

[0040] When a charging station malfunctions, the controller 120 acquires a charging status signal indicating the malfunction, controls the main switch of the power supply circuit 130 to disconnect, and simultaneously controls the heat dissipation device 140 to operate with a smaller heat dissipation power.

[0041] This application uses a controller 120 to acquire a charging status signal to determine the current charging status, and then controls the power supply circuit 130 to operate. Simultaneously, the controller 120 can control the heat dissipation device 140 to operate based on this charging status signal. Thus, the heat dissipation device 140 can dissipate heat while the charging device 100 is charging the receiving device 200, achieving good heat dissipation. The heat dissipation device 140 can be activated before the internal temperature of the charging device 100 rises, maintaining the temperature within a suitable range so that the electronic components inside the charging device 100 can operate at a suitable temperature, improving charging efficiency.

[0042] In one embodiment, the heat dissipation device 140 is a fan, and controlling the working state of the heat dissipation device 140 includes controlling the fan to turn on, controlling the fan to turn off, and adjusting the fan speed.

[0043] In one embodiment, the charging status signal is a control guidance status signal conforming to the standard IEC 61851. The control guidance status signal is primarily used for communication between the electric vehicle and the charging station. The control guidance status signal conveys charging status and control information through different voltage levels and connection states.

[0044] In one embodiment, the controller 120 is used to decode and convert the control guidance status signal and output a control signal; the control signal is used to control the operating state of the fan. For example, after receiving the control guidance status signal, the controller 120 decodes and converts the control guidance status signal and outputs a corresponding control signal to control the fan to turn on, off, or adjust the fan speed. The control guidance status signal can be a PWM signal, and the control signal can also be a PWM signal.

[0045] In one embodiment, the charging device 100 further includes a temperature detection device 150. The temperature detection device 150 is disposed within the charging device 100; the temperature detection device 150 is used to detect the operating temperature within the charging device 100. The controller 120 is further configured to control the heat dissipation device 140 to dissipate heat when the operating temperature is greater than a first preset temperature; and to control the heat dissipation device 140 to stop dissipating heat when the operating temperature is less than a second preset temperature; the second preset temperature is less than the first preset temperature. The temperature detection device 150 can be implemented using a temperature sensor.

[0046] In one embodiment, when the voltage of the control guidance state signal is within a first voltage range, the lower the voltage of the control guidance state signal, the higher the speed of the fan.

[0047] Reference Figure 2 The power output terminal 110 includes power pins (L1, L2, L3, N) and a status detection pin (CP). The power pins are connected to the power supply circuit 130 and are used to output the supply voltage. The controller 120 can control the output of the supply voltage by turning switches K1 and K2 on / off, and outputs a PWM signal through the status detection pin to control the maximum charging current supported between the charging device 100 and the electric vehicle. The controller 120 also obtains the charging status signal by detecting the voltage of the status detection pin. Switch S1 is located inside the charging device 100 and is used to confirm the connection status of the electric vehicle. Switch S1 selectively conducts between the 12V voltage pin and the PWM pin.

[0048] Initially, when the power output terminal 110 is not physically connected to the electric vehicle, switch S1 is connected to the +12V voltage pin. At this time, the controller 120 detects that the voltage of the status detection pin is 11~12V, which determines that the electric vehicle is not connected and does not require heat dissipation, so it controls the fan to remain in standby mode.

[0049] Afterwards, power output terminal 110 is connected to the electric vehicle. Before charging begins, controller 120 communicates with the electric vehicle to prepare for charging. A circuit is formed between the charging device 100 and the electric vehicle through power output terminal 110. The electric vehicle pulls the voltage at detection point 2 down to 9V through its internal circuitry. At this time, the power supply circuit 130 operates at low power and generates little heat. Controller 120 detects that the voltage on the status detection pin is 8-10V, confirming that the electric vehicle is connected, and then controls the fan to turn on, causing the fan to rotate at low speed.

[0050] After the controller 120 communicates with the electric vehicle, it outputs a power supply voltage to charge the vehicle according to its charging needs. If the number of connected electric vehicles is small, the power supply voltage is low. The electric vehicle adjusts the voltage at detection point 2 to 6V through its internal circuitry. At this time, the power supply circuit 130 operates at low power and generates little heat. The controller 120 detects that the voltage at the status detection pin is 5-7V, indicating that the charging power of the electric vehicle is low, and further controls the fan cooling power to increase, causing the fan to rotate at medium / medium-high speed. If the number of connected electric vehicles is large, the power supply voltage is high. The electric vehicle adjusts the voltage at detection point 2 to 3V through its internal circuitry. At this time, the power supply circuit 130 operates at high power and generates more heat. The controller 120 detects that the voltage at the status detection pin is 2-4V, indicating that the charging power of the electric vehicle is high, and further controls the fan cooling power to increase, causing the fan to rotate at high speed.

[0051] In addition, the controller 120 can also synchronously monitor the temperature inside the charging device 100 via the temperature detection device 150, and adjust the fan speed according to the temperature inside the charging device 100. If the temperature detection device 150 detects that the temperature inside the charging device 100 is higher than a first preset temperature, it controls the fan to maintain high-speed rotation or to continue increasing the fan speed. If the temperature detection device 150 detects that the temperature inside the charging device 100 is lower than a second preset temperature, it controls the fan to stop rotating.

[0052] The first and second preset temperatures can be set according to the operating temperature range of the charging device 100. The first voltage range can be set according to actual application. For example, the voltage range during normal charging of the charging device 100 can be set. It is understood that when the charging demand of the electric vehicle increases, the operating power of the charging device 100 will increase, and the heat generated will also increase. In this embodiment, the controller 120 can determine that the current charging demand is increasing by the decrease in the voltage of the charging status signal, and at the same time increase the speed of the fan. In this way, the controller 120 can determine the charging demand of the electric vehicle according to the charging status signal, and at the same time control the fan speed to adjust according to the charging demand, start heat dissipation / increase the heat dissipation rate before the temperature rises, keep the internal temperature of the charging device 100 within a suitable range, improve charging efficiency, and increase the safety and reliability of the charging device 100.

[0053] In one embodiment, the controller 120 is further configured to control the fan to operate at a first speed when the voltage of the control guidance state signal is within a second voltage range; the second voltage range is smaller than the first voltage range.

[0054] In this embodiment, the second voltage range can be set according to actual application. For example, it can be set as the voltage range when the connection between the charging device 100 and the electric vehicle is abnormal. When the connection between the charging device 100 and the electric vehicle is abnormal, the internal circuit of the electric vehicle adjusts the voltage of detection point 3 to 0V. The controller 120 detects that the voltage of the status detection pin is 0V, and can determine that the connection with the electric vehicle is abnormal. Then, it controls the power supply circuit 130 to stop working, and controls the fan to rotate at low speed or controls the fan to rotate according to the internal temperature of the charging device 100. If the internal temperature of the charging device 100 is greater than the first preset temperature, it controls the fan to rotate at high speed; if the internal temperature of the charging device 100 is less than the second preset temperature, it controls the fan to stop rotating; if the internal temperature of the charging device 100 is between the first preset temperature and the second preset temperature, it controls the fan to rotate at low or medium speed.

[0055] In one embodiment, the controller 120 is further configured to operate at a second rotational speed when the voltage of the control guidance state signal is within a third voltage range; the second rotational speed is greater than or equal to the first rotational speed; and the third voltage range is less than the second voltage range.

[0056] In this embodiment, the third voltage range can be set according to actual application. For example, it can be set to the voltage range when the charging device 100 malfunctions. When the charging device 100 malfunctions (e.g., the protection device is activated), the status detection pin is adjusted to -12V. The controller 120 detects that the voltage of the status detection pin is -12V, and can determine that the charging device 100 is malfunctioning. Then, it controls the power supply circuit 130 to stop working, and simultaneously controls the fan to rotate at high speed or controls the fan to rotate according to the internal temperature of the charging device 100. If the internal temperature of the charging device 100 is greater than the first preset temperature, the fan is controlled to rotate at high speed; if the internal temperature of the charging device 100 is less than the second preset temperature, the fan is controlled to stop rotating; if the internal temperature of the charging device 100 is between the first and second preset temperatures, the fan is controlled to rotate at low or medium speed. The low, medium, and high speeds can be set according to actual needs. For example, if the maximum fan speed is 2000 rpm, 500–1000 rpm can be set as low speed, 1000–1500 rpm as medium speed, and 1500–2000 rpm as high speed.

[0057] In one embodiment, the charging device 100 further includes a current detection circuit 160. The current detection circuit 160 is used to detect the operating current of the power supply circuit 130. The controller 120 is also used to control the power supply circuit 130 and the heat dissipation device 140 to stop working when the operating current is greater than a preset current.

[0058] In this embodiment, the current detection circuit 160 can be implemented using a detection resistor, which can be located in the power supply voltage output circuit. The preset current can be set according to the operating current of the charging device 100. When the current detection circuit 160 detects a current greater than the preset current, it indicates that there is a short circuit or overcurrent in the circuit. The controller 120 then controls the power supply circuit 130 and the heat dissipation device 140 to stop working to ensure the safe operation of the charging device 100.

[0059] Reference Figure 3 This application also proposes a heat dissipation control method applied to a charging device 100, the charging device 100 being used to communicate with a powered device 200 and output a charging status signal, the heat dissipation control method comprising:

[0060] S10: Obtain the charging status signal of the powered device 200.

[0061] S20: Control the working state of the heat dissipation device 140 according to the charging status signal.

[0062] In this embodiment, the charging device 100 is a charging pile, and the receiving device 200 is an electric vehicle. The charging pile is not physically connected to the electric vehicle and is in an idle state. At this time, the charging pile obtains a charging status signal representing the idle state and controls the heat dissipation device 140 to remain in standby state.

[0063] The charging station is connected to the electric vehicle, but charging has not yet started. At this time, the charging station receives a charging status signal indicating that it is connected but has not yet started charging, communicates with the electric vehicle to prepare for charging, and controls the heat dissipation device 140 to operate at low heat dissipation power.

[0064] The charging station is connected to an electric vehicle and is charging the vehicle at a relatively low charging power. At this time, the charging station receives a charging status signal indicating a low charging power, outputs a lower supply voltage according to the charging needs of the electric vehicle, and simultaneously controls the heat dissipation device 140 to operate at a lower heat dissipation power.

[0065] The charging station has been connected to multiple electric vehicles, charging them with a high charging power. At this time, the charging station receives a charging status signal indicating a high charging power, outputs a higher supply voltage according to the charging needs of the electric vehicles, and simultaneously controls the cooling device 140 to operate with a higher cooling power.

[0066] A connection error occurred between the charging station and the electric vehicle, causing charging to pause. At this time, the charging station received a charging status signal indicating a connection error, stopped charging, and simultaneously controlled the cooling device 140 to operate at a lower cooling power.

[0067] When a charging station malfunctions, a charging status signal indicating the malfunction is obtained, charging is stopped, and the heat dissipation device 140 is controlled to operate with a smaller heat dissipation power.

[0068] In one embodiment, the charging status signal is a control guidance status signal of standard IEC61851.

[0069] This application determines the current charging state by acquiring the charging state signal of the powered device 200, and then controls the output of the supply voltage. Simultaneously, the charging device 100 can also dissipate heat based on this charging state signal. Thus, the charging device 100 can dissipate heat while charging the powered device 200, based on the current charging state, resulting in good heat dissipation. Heat dissipation can begin before the internal temperature of the charging device 100 rises, maintaining the temperature within a suitable range so that the electronic components inside the charging device 100 can operate at an appropriate temperature, thereby improving charging efficiency.

[0070] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the spirit and scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A charging device, characterized in that, The charging device includes: The power output terminal is used for electrical connection to the powered device. The controller is used to communicate with the powered device and to acquire the charging status signal of the powered device; A power supply circuit is electrically connected to the controller and the power output terminal, respectively; the power supply circuit is used to output a charging voltage to the power output terminal to charge the powered device; the controller is used to control the operating state of the power supply circuit according to the charging status signal. A heat dissipation device is electrically connected to the controller; the controller is also used to control the operating state of the heat dissipation device according to the charging status signal.

2. The charging device as described in claim 1, characterized in that, The heat dissipation device is a fan, and the controller controls the working state of the heat dissipation device, including controlling the fan to turn on, controlling the fan to turn off, and adjusting the fan speed.

3. The charging device as described in claim 2, characterized in that, The charging status signal includes the control guidance status signal of standard IEC61851.

4. The charging device as described in claim 3, characterized in that, The controller is used to decode and convert the control guidance status signal and output a control signal; the control signal is used to control the working state of the fan.

5. The charging device as described in claim 3, characterized in that, When the voltage of the control guidance state signal is within a first voltage range, the lower the voltage of the control guidance state signal, the higher the speed of the fan.

6. The charging device as described in claim 5, characterized in that, The controller is used to control the fan to operate at a first speed when the voltage of the control guidance state signal is within a second voltage range; the second voltage range is smaller than the first voltage range.

7. The charging device as described in claim 6, characterized in that, The controller is configured to operate at a second rotational speed when the voltage of the control guidance state signal is within a third voltage range; the second rotational speed is greater than or equal to the first rotational speed; and the third voltage range is less than the second voltage range.

8. The charging device according to any one of claims 1 to 7, characterized in that, The charging equipment also includes a temperature detection device; The temperature detection device is located inside the charging equipment; the temperature detection device is used to detect the operating temperature inside the charging equipment. The controller is further configured to control the heat dissipation device to dissipate heat when the operating temperature is greater than a first preset temperature; and to control the heat dissipation device to stop dissipating heat when the operating temperature is less than a second preset temperature; wherein the second preset temperature is less than the first preset temperature.

9. A heat dissipation control method applied to a charging device, the charging device including a heat dissipation device, the charging device being used to communicate with a powered device, characterized in that, The heat dissipation control method includes: Obtain the charging status signal of the powered device; The operating state of the heat dissipation device is controlled according to the charging status signal.

10. The heat dissipation control method as described in claim 9, characterized in that, The charging status signal includes the control guidance status signal of standard IEC61851.

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