Safety protection system of charging device

Abstract

The utility model relates to the technical field of charging device protection equipment, in particular to a charging device safety protection system, which comprises a pile shell, a smoke sensor, an infrared flame sensor, a control mainboard, a power-off execution module and a communication unit, the control mainboard is arranged in the pile shell, the smoke sensor is arranged on the upper shell wall of the pile shell, and the infrared flame sensor is arranged on the lower shell wall of the pile shell. The infrared flame sensor is arranged on the side shell wall of the pile shell, the power-off execution module is arranged in the pile shell and located on the control mainboard, and the communication unit is arranged in the pile shell and located on one side of the power-off execution module. The smoke sensor, the infrared flame sensor, the power-off execution module and the communication unit are all electrically connected with the control mainboard. The full-protection system integrates the functions of smoke and infrared dual-mode detection, automatic power-off, fire early warning and positioning alarm, solves the problems that a traditional single sensor is high in false alarm rate and delayed in emergency response, and remarkably improves the charging fire prevention and control efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of protection equipment for charging devices, and particularly relates to a safety protection system for charging devices. Background Art

[0002] Most of the existing charging piles, especially those installed in public places, only have protective devices such as rain shelters, but their protective effects are limited; there are significant defects in the safety protection technology of current electric vehicle charging devices, which are mainly reflected in three aspects: detection reliability, response mechanism and maintenance cost.

[0003] The existing technologies mostly rely on a single sensor (such as a smoke or temperature sensor) for abnormal detection, but such solutions are easily interfered by environmental factors. For example, a smoke sensor may be triggered by dust or water mist to give false alarms, and a temperature sensor cannot distinguish between environmental high temperature and a real fire. Although some solutions (such as CN202021182386.X) adopt dual detection of smoke + temperature, they still lack a flame recognition function and cannot verify a fire through multi-modal data (such as flame spectrum, smoke concentration, temperature gradient) in cooperation, resulting in a high false positive rate. In addition, the existing technologies do not combine infrared or ultraviolet flame sensors, making it difficult to accurately identify early fire sources and delaying the treatment time. In addition, most of the existing protection systems are limited to local alarms or simple power offs, and cannot achieve accurate fault location and multi-level linkage response. In addition, the existing technologies lack intelligent analysis capabilities, such as predicting the risk of battery thermal runaway based on big data or quickly judging the type of fault through edge computing, resulting in a lag in response.

[0004] The existing electric vehicle charging safety protection technologies have core problems such as single detection means, isolated response mechanism and low maintenance efficiency, and there is an urgent need for a new system integrating multi-sensor fusion detection, intelligent remote linkage and modular design to improve safety and reduce operation and maintenance costs. Summary of the Invention

[0005] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the utility model is to provide a safety protection system for charging devices, which integrates dual-mode detection of smoke and infrared rays, automatic power off, fire warning and positioning alarm functions, solves the problems of high false positive rate and late emergency response of traditional single sensors, and significantly improves the efficiency of charging fire prevention and control.

[0006] The objective of this utility model is achieved through the following technical solution: a charging device safety protection system, comprising a charging housing, a smoke sensor, an infrared flame sensor, a control motherboard, a power-off execution module, and a communication unit. The control motherboard is located inside the charging housing, the smoke sensor is located on the upper shell wall of the charging housing, the infrared flame sensor is located on the side shell wall of the charging housing, the power-off execution module is located inside the charging housing and on the control motherboard, and the communication unit is located inside the charging housing and on one side of the power-off execution module. The smoke sensor, the infrared flame sensor, the power-off execution module, and the communication unit are all electrically connected to the control motherboard.

[0007] Furthermore, a microprocessor is also provided inside the pile housing, and the microprocessor is located on one side of the communication unit.

[0008] Furthermore, the pile shell includes a cover plate and a shell. The shell has an open end, and the cover plate covers the open end of the shell. The shell has an installation cavity, and the installation cavity has a plurality of limiting brackets. The limiting brackets include an integrally formed base and a buckle. The connection between the buckle and the base has a slot. The buckle has an inclined surface that slopes from bottom to top on the side away from the shell wall. The limiting brackets are evenly distributed in the installation cavity, and the edges of each board of the control main board are respectively fixed in the slots.

[0009] Furthermore, the housing also contains several connecting posts, which are located at the four corners of the mounting cavity. The cover plate has countersunk holes corresponding to the connecting posts, and screws are installed in the countersunk holes. The cover plate is fixed to the opening end of the housing by locking the screws to the connecting posts.

[0010] Furthermore, the cover plate has an installation port, in which a charging module is embedded, and the end of the charging module extends to be electrically connected to the control motherboard.

[0011] Furthermore, the pile shell is made of V0-grade flame-retardant PC material.

[0012] The beneficial effects of this utility model are as follows: By integrating a smoke sensor, an infrared flame sensor, a power-off execution module, and a communication unit into the charging pile shell, this utility model enables it to have dual-mode detection of smoke and infrared light, automatic power-off, fire early warning, and location alarm functions. It solves the problems of high false alarm rate and slow emergency response of traditional single sensors, significantly improves the efficiency of charging fire prevention and control, and is suitable for high-density deployment of shared charging scenarios. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention;

[0014] Figure 2This is a first exploded view of the present invention;

[0015] Figure 3 This is a second exploded view of the present invention;

[0016] Figure 4 This is a schematic diagram of the shell structure of this utility model;

[0017] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0018] The attached diagram is labeled as follows: 1-Pile shell, 11-Cover plate, 12-Shell, 13-Mounting cavity, 14-Limiting seat, 141-Base, 142-Snap fastener, 143-Slot, 144-Chamfer, 15-Connecting column, 16-Counterhole, 17-Mounting port, 2-Smoke sensor, 3-Infrared flame sensor, 4-Control motherboard, 5-Power-off execution module, 6-Microprocessor, 7-Communication unit, 8-Charging module. Detailed Implementation

[0019] To facilitate understanding by those skilled in the art, the following description is provided in conjunction with embodiments and appendices. Figure 1-5 The present invention will be further described below. The content mentioned in the embodiments is not intended to limit the present invention.

[0020] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0021] When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0024] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0025] See Figure 1-5 A safety protection system for a charging device includes a charging housing 1, a smoke sensor 2, an infrared flame sensor 3, a control motherboard 4, a power-off execution module 5, a microprocessor 6, and a communication unit 7. The control motherboard 4 is located inside the charging housing 1. The smoke sensor 2 is located on the upper shell wall of the charging housing 1. The infrared flame sensor 3 is located on the side shell wall of the charging housing 1 (tilted at an angle of 15°). The power-off execution module 5 is located inside the charging housing 1 and on the control motherboard 4. The communication unit 7 is located inside the charging housing 1 and on one side of the power-off execution module 5. The microprocessor 6 is located on one side of the communication unit 7. The smoke sensor 2, the infrared flame sensor 3, the power-off execution module 5, the microprocessor 6, and the communication unit 7 are all electrically connected to the control motherboard 4.

[0026] The charging device safety protection system in this embodiment integrates a smoke sensor 2, an infrared flame sensor 3, a power-off execution module 5, and a communication unit 7 into the charging pile housing 1, enabling it to perform dual-mode smoke and infrared detection, automatic power-off, fire early warning, and location alarm functions. The smoke sensor 2 and the infrared flame sensor 3 are installed in different locations inside the charging pile housing 1, forming a cross-detection network. When the signals from the smoke sensor 2 and the infrared flame sensor 3 simultaneously exceed the threshold, the control motherboard 4 triggers a multi-level response chain—prioritizing the cutting off of the charging power supply, and pushing the fire coordinates and user information to the fire platform and the bound mobile terminal through the communication unit 7. This solves the problems of high false alarm rate and delayed emergency response of traditional single sensors, significantly improving the efficiency of charging fire prevention and control, and is suitable for high-density deployment of shared charging scenarios. Specifically, the smoke sensor 2 can be an MQ-2 smoke sensor with a detection threshold set to 30-50ppm; the infrared flame sensor 3 is an MLX90614 (detection band 700-1100nm) with an effective detection distance of 0.5-1.5m; the control motherboard 4 is based on an STM32F407 chip and has a built-in dual-signal fusion algorithm that can simultaneously receive and process signals from the smoke sensor 2 and the infrared flame sensor 3; the power-off execution module 5 includes a magnetic latching relay (response time ≤50ms).

[0027] In this embodiment, the pile shell 1 includes a cover plate 11 and a shell 12. The shell 12 has an open end, and the cover plate 11 covers the open end of the shell 12. The shell 12 has an installation cavity 13, and the installation cavity 13 has a plurality of limiting brackets 14. The limiting bracket 14 includes an integrally formed base 141 and a buckle 142. The connection between the buckle 142 and the base 141 is provided with a slot 143. The side of the buckle 142 away from the shell wall of the shell 12 is provided with an inclined surface 144 that slopes from bottom to top. The limiting brackets 14 are evenly distributed in the installation cavity 13. The edges of each plate of the control main board 4 are respectively fixed in the slots 143.

[0028] In this embodiment, the control motherboard 4 can be fixed in the housing 12 by setting a limiting bracket 14 in the mounting cavity 13. Specifically, when fixing the control motherboard 4, the control motherboard 4 is first pressed down from the inclined surface 144 of the buckle 142 and slid into the slot 143. The control motherboard 4 can be fixed by using multiple limiting brackets 14, avoiding the drawback of the traditional method of fixing the control motherboard 4 by drilling holes and screws. At the same time, the above structure facilitates the assembly or disassembly of the control motherboard 4.

[0029] In this embodiment, the housing 12 also contains several connecting posts 15, which are located at the four corners of the mounting cavity 13. The cover plate 11 is provided with countersunk holes 16 corresponding to the connecting posts 15, and screws are provided in the countersunk holes 16. The cover plate 11 is fixed to the opening end of the housing 12 by locking the screws to the connecting posts 15. The fixing method of countersunk holes 16 + screws not only improves the appearance of the pile housing 1, but also facilitates product assembly or disassembly and maintenance, thus improving the practicality of the safety protection system.

[0030] In this embodiment, the cover plate 11 has an installation port 17, and a charging module 8 is embedded in the installation port 17. The end of the charging module 8 extends to be electrically connected to the control motherboard 4.

[0031] In this embodiment, the pile shell 1 is made of V0 grade flame-retardant PC material.

[0032] Operation process

[0033] Step 1: Smoke sensor 2 and infrared flame sensor 3 synchronously collect data;

[0034] Step 2: Control motherboard 4 to perform signal fusion judgment:

[0035] If only the smoke level is exceeded → a preliminary warning will be sent to the user's app;

[0036] If both smoke and flame exceed the limit, a Level 3 response will be triggered.

[0037] Power-off execution module 5 cuts off the power supply;

[0038] Communication unit 7 pushes alarm information to the fire protection platform (including pile number, location, and user contact information);

[0039] Step 3: The fire platform automatically generates a rescue work order and navigates to the fire location.

[0040] The dual-sensor collaboration of the aforementioned safety protection system reduces the false alarm rate from 25% to <5%; graded response reduces the impact of unnecessary power outages on users; rapid positioning shortens the fire response time to within 5 minutes (traditional solutions >15 minutes).

[0041] Normal charging scenario: After the user inserts the charging gun, the smoke sensor 2 and the infrared flame sensor 3 continuously monitor the environmental parameters: the smoke concentration is maintained at <20ppm and the infrared signal intensity is <200Lux; the control motherboard 4 determines that the status is normal and sends a data packet to the server every 10 minutes.

[0042] Lithium battery thermal runaway leads to open flame:

[0043] 1) The smoke concentration rose to 60 ppm, and the infrared sensor detected a signal of >1000 Lux for 1.5 seconds;

[0044] 2) Control the motherboard to boot into a three-level response:

[0045] Power is cut off within 50ms;

[0046] Communication unit 7 acquires the location and sends alarm information to the fire protection platform (JSON format: {"device_id":"CZ-2023","lat":31.209,"lon":121.512,"user_tel":"138XXXX5678"});

[0047] 3) A red warning pops up on the user's mobile app: "Fire detected! Power has been automatically cut off. Please stay away from the charging station!"

[0048] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A safety protection system for a charging device, characterized in that: The device includes a pile housing, a smoke sensor, an infrared flame sensor, a control motherboard, a power-off execution module, and a communication unit. The control motherboard is located inside the pile housing. The smoke sensor is located on the upper shell wall of the pile housing. The infrared flame sensor is located on the side shell wall of the pile housing. The power-off execution module is located inside the pile housing and on the control motherboard. The communication unit is located inside the pile housing and to one side of the power-off execution module. The smoke sensor, infrared flame sensor, power-off execution module, and communication unit are all electrically connected to the control motherboard.

2. The safety protection system for a charging device according to claim 1, characterized in that: The pile housing is also equipped with a microprocessor, which is located on one side of the communication unit.

3. The safety protection system for a charging device according to claim 1, characterized in that: The pile shell includes a cover plate and a shell. The shell has an open end, and the cover plate covers the open end of the shell. The shell has an installation cavity, and the installation cavity has a plurality of limiting brackets. The limiting bracket includes an integrally formed base and a buckle. The connection between the buckle and the base has a slot. The buckle has an inclined surface that slopes from bottom to top on the side away from the shell wall. The limiting brackets are evenly distributed in the installation cavity. The edges of each board of the control main board are respectively fixed in the slots.

4. A safety protection system for a charging device according to claim 3, characterized in that: The housing also contains several connecting posts, which are located at the four corners of the mounting cavity. The cover plate has countersunk holes corresponding to the connecting posts, and screws are installed in the countersunk holes. The cover plate is fixed to the opening end of the housing by locking the connecting posts with the screws.

5. A safety protection system for a charging device according to claim 3, characterized in that: The cover plate has an installation port, and a charging module is embedded in the installation port. The end of the charging module extends to be electrically connected to the control motherboard.

6. A safety protection system for a charging device according to claim 1, characterized in that: The pile shell is made of flame-retardant PC material.

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