Power supply overload protection device

Abstract

The utility model discloses a power supply overload protection device which comprises a power supply, a central controller, a power supply management chip, a memory, a surge monitoring device, a power utilization data acquisition module, a safety monitoring device, a communication module and a cooling heat dissipation device. The power supply, the power management chip and the central controller are connected in sequence; the memory, the surge monitoring device, the power utilization data acquisition module, the safety monitoring device, the communication module and the cooling and heat dissipation device are respectively connected with the central controller; current detection is carried out on each detection end connected with electric equipment through a power management chip, a power supply circuit is controlled, and when a current monitoring chip acquires that the circuit is overloaded, the current on the electric equipment is cut off in time, so that the safety of a power supply is ensured; the charging environment is monitored, surge protection is carried out on the circuit, and the safety when the power supply is used is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of overload protection, in particular to a power supply overload protection device. Background Art

[0002] The emergence of new energy vehicles has brought about earth-shaking changes in people's lives. For the convenience of daily use, families often configure home charging piles when purchasing new energy vehicles to facilitate charging of new energy vehicles. When the current through the circuit of the home charging pile is at a normal value, the power supply can normally supply power to the electrical equipment. When the current through the wire is at an abnormal value, the power supply cannot normally supply power to the electrical equipment. In severe cases, it will cause the power supply and the new energy vehicle to burn and explode. In order to solve this problem, it is necessary to develop a power overload protection device. The power overload protection device is configured on the power supply to improve the safety performance of users using the power supply to charge new energy vehicles, thereby increasing the service life of the new energy vehicle battery. While charging the new energy vehicle, the charging environment such as temperature and fire condition is monitored to prevent the occurrence of dangerous accidents such as combustion and explosion. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a power overload protection device to solve the problem of insufficient current monitoring and charging environment monitoring during the use of home charging piles by new energy vehicles, and failure to prevent safety accidents in a timely manner.

[0004] The purpose of the utility model is achieved through the following technical solutions: a power overload protection device, a power supply, a central controller, a power management chip, a memory, a surge monitoring device, a power consumption data acquisition module, a safety monitoring device, a communication module and a cooling and heat dissipation device; the power supply, the power management chip and the central controller are connected in sequence; the memory, the surge monitoring device, the power consumption data acquisition module, the safety monitoring device, the communication module and the cooling and heat dissipation device are respectively connected to the central controller.

[0005] The power overload protection device proposed by the utility model is arranged on the power supply of the household charging pile, and performs safety detection on the change of current during charging. When the power load is too large and the current exceeds the preset safety current, the current on the electrical equipment in this way is promptly cut off and an alarm signal is sent to the mobile terminal. The charging environment such as the temperature and humidity in the charging pile during charging is also monitored, so as to improve the safety performance of users when using the power supply to charge new energy vehicles.

[0006] Preferably, the power supply is connected to the input power terminal of the power management chip, and the power management chip has at least one output power terminal, each output power terminal is connected to the power terminal of at least one electrical device; the power management chip also includes at least one detection terminal, and each detection terminal corresponds to a connection line connected to the electrical device.

[0007] Preferably, the electricity consumption data acquisition module includes a current monitoring chip, a current sensor and an electricity consumption prompt module; the current sensor is connected to the current monitoring chip, and the current monitoring chip and the electricity consumption prompt module are respectively connected to the central controller.

[0008] Preferably, the power usage reminder module includes a display driver chip, a display screen, an audio control chip and a speaker, the display driver chip is connected to the display screen, the audio control chip is connected to the speaker, and the display driver chip and the audio control chip are respectively connected to the central controller.

[0009] Preferably, the surge monitoring device includes a surge protector, a leakage current transformer and an intelligent lightning protection surge monitoring module. The surge protector is connected to the leakage current transformer and is arranged between the power supply and the power management chip. The surge protector and the leakage current transformer are respectively connected to the intelligent lightning protection surge monitoring module, and the intelligent lightning protection surge monitoring module is connected to the central controller.

[0010] Preferably, the security monitoring device includes an alarm, a temperature sensor, a humidity sensor, a smoke sensor and an analog-to-digital converter, the temperature sensor, the humidity sensor and the smoke sensor are respectively connected to the analog-to-digital converter, and the alarm and the analog-to-digital converter are respectively connected to the central controller.

[0011] Preferably, the cooling and heat dissipation device includes a semiconductor refrigeration plate, a semiconductor refrigeration plate temperature control module, a micro fan and a fan controller. The semiconductor refrigeration plate is connected to the semiconductor refrigeration plate temperature control module, the micro fan is connected to the fan controller, and the semiconductor refrigeration plate temperature control module and the fan controller are respectively connected to the central controller.

[0012] Preferably, the communication module includes a 4G chip and a 4G antenna, and the 4G module establishes a 4G network connection with the central controller via the 4G antenna.

[0013] Preferably, the central controller uses an MCU microcontroller of model MC9S08P32.

[0014] The beneficial effects of the utility model are as follows: the power overload protection device detects the current at each detection end connected to the electrical equipment through the power management chip, and controls the power supply circuit; when the current monitoring chip detects that the circuit is overloaded, the current on the electrical equipment in this way is cut off in time to ensure the safety of the power supply; the charging environment is monitored, the circuit is surge protected, and the safety when using the power supply is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a principle schematic diagram of a power overload protection device;

[0016] Figure 2 It is a schematic diagram of the principle of a power usage reminder module in a power overload protection device;

[0017] Figure 3 The figure is a schematic diagram of the principle of a safety monitoring device in a power overload protection device. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present utility model is not limited to the following.

[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model is further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the utility model. It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0021] Moreover, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a list of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus. In the absence of more restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0022] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0023] like Figure 1 As shown, a power overload protection device includes a power supply, a central controller, a power management chip, a memory, a surge monitoring device, a power consumption data acquisition module, a safety monitoring device, a communication module and a cooling and heat dissipation device; the power supply, the power management chip and the central controller are connected in sequence; the memory, the surge monitoring device, the power consumption data acquisition module, the safety monitoring device, the communication module and the cooling and heat dissipation device are respectively connected to the central controller.

[0024] The power supply is connected to the input power terminal of the power management chip. The power management chip has at least one output power terminal, each of which is connected to the power terminal of at least one power-consuming device. The power management chip also includes at least one detection terminal, each of which corresponds to a connection line connected to the power-consuming device.

[0025] The surge monitoring device is equipped with a surge threshold inside. The surge monitoring device monitors the surge in the charging process in real time, that is, monitors the voltage value in the charging circuit in real time, and compares the real-time monitored voltage surge value with the preset voltage surge threshold. When the real-time surge value exceeds the surge threshold, the charging circuit is disconnected in time through the central controller to achieve surge protection for the charging circuit, avoiding the charging process abnormality due to excessive surge voltage in the charging circuit, and even causing safety accidents.

[0026] It should be noted that the central controller uses an MCU microcontroller model MC9S08P32, which is an integrated device that includes information processing, sending control instructions, and displaying data through a display device; the power management chip controls the output power end of each power management chip and the power supply circuit of the power-consuming device according to the current signal detected by the detection end of each connected power-consuming device. The power management chip model used is FT8380D, which integrates a constant current and constant voltage control module and built-in output line loss compensation. It can achieve constant current and constant voltage and fast dynamic output, and provides functions including but not limited to VCC overvoltage protection and OPT overtemperature circuit protection.

[0027] The power consumption data acquisition module includes a current monitoring chip, a current sensor and a power consumption prompt module; the current sensor is connected to the current monitoring chip, and the current monitoring chip and the power consumption prompt module are respectively connected to the central controller;

[0028] It should be noted that the model of the current monitoring chip selected is AD8215YRZ. The current sensor is used to collect the current signal between the electrical equipment and the power supply. The current sensor is arranged between the power management chip and the electrical equipment to obtain the on-off status information of the power supply circuit between the power management chip and each electrical equipment. When it is obtained that the electrical equipment and the power management chip are in a disconnected state, the current monitoring chip collects the current parameters when the electrical equipment is disconnected, as well as the duration of the safe current and the power consumption from the start of power-on to the power-off period, and visualizes the information through the power consumption prompt module.

[0029] A current safety threshold is set in the current monitoring chip. The current monitoring chip detects the current value during the charging process in real time and compares it with the preset current safety threshold. When the current monitoring chip detects that the current value of the circuit exceeds the preset safety current threshold, it indicates that there is a current overload in the charging circuit. The current monitoring chip sends a current overload alarm signal to the power management chip. The power management chip controls to cut off the current on this electrical device to ensure the safety of the charging circuit.

[0030] The current monitoring chip also transmits the power consumption information to the central controller. The central controller completes the data and information transmission with the mobile terminal through the communication module. The memory stores the alarm signal. If the power consumption data acquisition module detects that the current exceeds the preset safety current or the safety monitoring device detects that the charging environment is abnormal, the central controller sends the alarm signal in the memory to the mobile terminal for an alarm reminder, and also remotely sends the current parameters and power consumption of the charging pile to the mobile terminal.

[0031] like Figure 2 As shown, the power usage reminder module includes a display driver chip, a display screen, an audio control chip and a speaker. The display driver chip is connected to the display screen, the audio control chip is connected to the speaker, and the display driver chip and the audio control chip are respectively connected to the central controller.

[0032] It should be noted that the display driver chip model is HT16C22, the current monitoring chip collects the current parameters when the electrical equipment is disconnected, as well as the duration of the safe current and the power consumption from the start of power-on to the end of power-off, and sends the collected data to the central controller. The central controller drives the working status of the display screen through the display driver chip, so that the display screen displays the on and off status of the charging pile, the charging time and the power consumption at this time; the audio control chip model is ALC662-GR. In order to improve convenience, the audio controller chip is also connected to the speaker. When the current monitoring chip detects that the circuit is disconnected, that is, the charging pile has been used, the above information will be broadcasted by voice.

[0033] The surge monitoring device includes a surge protector, a leakage current transformer and an intelligent lightning protection surge monitoring module. The surge protector is connected to the leakage current transformer and is arranged between the power supply and the power management chip. The surge protector and the leakage current transformer are respectively connected to the intelligent lightning protection surge monitoring module, and the intelligent lightning protection surge monitoring module is connected to the central controller.

[0034] It should be noted that the surge protector provides surge protection for the circuit, and the leakage current transformer detects the leakage signal of the circuit. The model selected for the intelligent lightning protection surge monitoring module is WJZ10. This module has functions including but not limited to recording the number of lightning strikes, switching quantity status monitoring, three-phase grid voltage monitoring, and grounding status monitoring. In addition to recording the number of lightning strikes discharged by the surge protector, it can also monitor the working status of the surge protector, the status of the backup circuit breaker, the operating temperature of the surge protector, and the leakage current of the surge protector, and understand the working status of the surge protector and the leakage current transformer in real time. The monitored data can also be used with a built-in algorithm to calculate the expected life of the equipment, and the built-in LCD screen can query the monitored values ​​and status.

[0035] like Figure 3 As shown, the safety monitoring device includes an alarm, a temperature sensor, a humidity sensor, a smoke sensor and an analog-to-digital converter; the temperature sensor is TN2415, the humidity sensor is HIH-4602, the smoke sensor is HAJB-Y-2, and the alarm is an acousto-optic alarm of model BJD330; the temperature sensor, humidity sensor and smoke sensor are all arranged next to the home charging pile to monitor the use environment of the charging pile. When the temperature sensor, humidity sensor and smoke sensor send analog signals to the analog-to-digital converter for analog-to-digital conversion, if the central controller receives that the smoke concentration, temperature parameters and humidity parameters exceed the preset values, the central controller sends an electrical signal to the alarm to control it to give an alarm reminder. The alarm signal is also stored in the memory, and the central controller sends the alarm signal remotely to the mobile terminal through the communication module.

[0036] The safety monitoring device is equipped with temperature threshold, humidity threshold and smoke threshold. The safety monitoring device monitors the temperature, humidity and smoke information of the environment during the charging process in real time. When the monitored ambient temperature is greater than the temperature threshold or the monitored humidity is greater than the humidity threshold or the smoke value is greater than the smoke threshold, the internal alarm of the safety monitoring device will be triggered, and the alarm will be used to alert the charging user so that the user can deal with the abnormal situation in time to ensure the safety of the charging process.

[0037] The cooling and heat dissipation device includes a semiconductor cooling sheet, a semiconductor cooling sheet temperature control module, a micro fan and a fan controller. The semiconductor cooling sheet is connected to the semiconductor cooling sheet temperature control module, the micro fan is connected to the fan controller, and the semiconductor cooling sheet temperature control module and the fan controller are respectively connected to the central controller.

[0038] It should be noted that the model of the semiconductor refrigeration chip is TEC1-12703, which is used in conjunction with a micro fan to dissipate heat for home charging piles. The model of the semiconductor refrigeration chip temperature control module is TEC-20A24V, which is used to control the working state of the semiconductor refrigeration chip. The working temperature of the semiconductor refrigeration chip can be set manually or through serial port commands, and the internal temperature changes during the use of the charging pile can be detected. The set power can be forced to output. When the semiconductor refrigeration chip temperature control module detects that the temperature of the working environment has reached the preset parameters, the semiconductor refrigeration chip is controlled to start cooling, and an electrical signal is sent to the central controller. The central controller controls the working state of the micro fan through the fan controller; the fan controller uses a fan motor controller with model 716PCASTS0060. The semiconductor refrigeration chip cools the inside of the charging pile, and the micro fan is an exhaust fan, which ventilates and dissipates heat from the interface and overheated power supply.

[0039] The communication module includes a 4G chip and a 4G antenna. The 4G module establishes a 4G network connection with the central controller through the 4G antenna. The central controller establishes a communication connection with the mobile terminal through the communication module to realize remote transmission of data.

[0040] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A power overload protection device, characterized in that: It includes power supply, central controller, power management chip, memory, surge monitoring device, power consumption data acquisition module, safety monitoring device, communication module and cooling device; The power supply, power management chip and central controller are connected in sequence; The memory, surge monitoring device, power consumption data acquisition module, safety monitoring device, communication module and cooling and heat dissipation device are respectively connected to the central controller.

2. A power overload protection device according to claim 1, characterized in that: The power supply is connected to the input power terminal of the power management chip, and the power management chip has at least one output power terminal, each of which is connected to the power terminal of at least one power-consuming device; The power management chip also includes at least one detection terminal, and each detection terminal corresponds to a connection line connected to an electrical device.

3. A power overload protection device according to claim 1, characterized in that: The power consumption data acquisition module includes a current monitoring chip, a current sensor and a power consumption prompt module; the current sensor is connected to the current monitoring chip, and the current monitoring chip and the power consumption prompt module are respectively connected to the central controller.

4. A power overload protection device according to claim 3, characterized in that: The power usage reminder module includes a display driver chip, a display screen, an audio control chip and a speaker. The display driver chip is connected to the display screen, the audio control chip is connected to the speaker, and the display driver chip and the audio control chip are respectively connected to the central controller.

5. A power overload protection device according to claim 1, characterized in that: The surge monitoring device includes a surge protector, a leakage current transformer and an intelligent lightning protection surge monitoring module. The surge protector is connected to the leakage current transformer and is arranged between the power supply and the power management chip. The surge protector and the leakage current transformer are respectively connected to the intelligent lightning protection surge monitoring module, and the intelligent lightning protection surge monitoring module is connected to the central controller.

6. A power overload protection device according to claim 1, characterized in that: The safety monitoring device includes an alarm, a temperature sensor, a humidity sensor, a smoke sensor and an analog-to-digital converter. The temperature sensor, the humidity sensor and the smoke sensor are respectively connected to the analog-to-digital converter, and the alarm and the analog-to-digital converter are respectively connected to the central controller.

7. A power overload protection device according to claim 1, characterized in that: The cooling and heat dissipation device includes a semiconductor refrigeration plate, a semiconductor refrigeration plate temperature control module, a micro fan and a fan controller. The semiconductor refrigeration plate is connected to the semiconductor refrigeration plate temperature control module, the micro fan is connected to the fan controller, and the semiconductor refrigeration plate temperature control module and the fan controller are respectively connected to the central controller.

8. A power overload protection device according to claim 1, characterized in that: The communication module includes a 4G chip and a 4G antenna, and the 4G chip establishes a 4G network connection with the central controller through the 4G antenna.

9. A power overload protection device according to claim 1, characterized in that: The central controller uses an MCU microcontroller of model MC9S08P32.

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