Automatic fire extinguishing device for battery charging thermal runaway

Abstract

The utility model provides an automatic fire extinguishing device for battery charging thermal runaway. The automatic fire extinguishing device comprises a metal shell, a fire extinguishing system, a thermocouple, an alarm device and a controller, the metal shell comprises a charging space for accommodating a lithium battery of the electric bicycle; the fire extinguishing system is installed at the top of the metal shell and comprises a water supply system and a temperature sensing spray head, the water supply system is connected with the temperature sensing spray head through a conveying pipeline, and an electromagnetic valve is arranged on the conveying pipeline; the thermocouple is installed at the bottom of the metal shell, and the alarm system is installed on the outer side of the metal shell. And the controller is electrically connected with the thermocouple, the alarm device and the electromagnetic valve. The fire extinguishing system is quickly started when the lithium battery is subjected to thermal runaway, so that fire disasters are prevented.

Description

Technical Field

[0001] The present application belongs to the technical field of battery charging safety protection, and in particular relates to an automatic fire extinguishing device for battery charging thermal runaway. Background Art

[0002] With the widespread use of electric bicycles, lithium batteries have become their primary energy storage device. However, during charging, lithium batteries can experience thermal runaway, particularly in situations such as overcharging, short circuits, or internal defects. This can cause a sharp rise in battery temperature and even fire. Traditional protective measures against sudden thermal runaway events often fail to respond promptly, making it difficult to effectively control fires. Therefore, developing a device that can monitor battery temperature in real time and automatically extinguish fires is crucial. Summary of the Invention

[0003] This application provides an automatic fire extinguishing device for battery charging thermal runaway, which at least solves the thermal runaway problem of lithium batteries during charging in the related art. The technical solution of this application is as follows:

[0004] An embodiment of the present application provides an automatic fire extinguishing device for battery charging thermal runaway, comprising a metal casing, a fire extinguishing system, a thermocouple, an alarm device and a controller; the metal casing includes a charging space for accommodating an electric bicycle lithium battery; the fire extinguishing system is installed on the top of the metal casing, the fire extinguishing system includes a water supply system and a temperature-sensing nozzle, the water supply system is connected to the temperature-sensing nozzle via a delivery pipeline, and an electromagnetic valve is provided on the delivery pipeline; the thermocouple is installed at the bottom of the metal casing, and the alarm system is installed on the outside of the metal casing; the controller is electrically connected to the thermocouple, the alarm device and the solenoid valve.

[0005] In some embodiments, the water supply system includes a water tank, a water supply pipe, and a faucet, the water tank is connected to the faucet through the water supply pipe, and the faucet is connected to the delivery pipeline.

[0006] In some embodiments, the automatic fire extinguishing device further includes a metal float, and a float valve is further provided on the delivery pipeline. The metal float is connected to the float valve to control the opening and closing of the float valve according to the water level.

[0007] In some embodiments, the automatic fire extinguishing device further includes a drain pipe and a drain valve, wherein the drain pipe is installed on one side of the metal shell, the drain valve is installed on the drain pipe, and the drain valve is connected to the controller.

[0008] In some embodiments, a through hole is provided on the upper portion of the metal shell, and the through hole is used to pass the charging plug.

[0009] In some embodiments, the top cover of the metal housing can be opened by hinges or hinges, and a sealing strip is provided around the top cover.

[0010] In some embodiments, the length, width and height of the metal housing are 600 mm×400 mm×400 mm respectively.

[0011] The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects:

[0012] By placing the lithium battery in a metal casing, thermocouples and temperature-sensing sprinklers can effectively monitor the battery's temperature changes. If thermal runaway occurs, the fire extinguishing system can be quickly activated to prevent fires. Furthermore, the thermocouples and solenoid valves work together to prevent the temperature-sensing sprinklers from triggering accidentally, potentially causing damage. Once the fire is extinguished, the solenoid valves can be closed to prevent excessive firefighting and water waste.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0015] Figure 1 Schematic diagram of the structure of an automatic fire extinguishing device for battery charging thermal runaway according to an embodiment of the present application.

[0016] Description of reference numerals:

[0017] 1-Metal casing, 2-Temperature sensing nozzle, 3-Thermocouple, 4-Water supply system, 5-Delivery pipeline, 6-Controller, 7-Solenoid valve, 8-Metal float, 9-Alarm system, 10-Drain valve. DETAILED DESCRIPTION

[0018] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0019] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0021] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] The present application provides an automatic fire extinguishing device for battery charging thermal runaway, such as Figure 1 As shown, the automatic fire extinguishing device includes a metal shell 1, a fire extinguishing system, a thermocouple 3, an alarm device and a controller 6; the metal shell 1 includes a charging space for accommodating the lithium battery of the electric bicycle; the fire extinguishing system is installed on the top of the metal shell 1, and the fire extinguishing system includes a water supply system 4 and a temperature sensing nozzle 2, and the water supply system 4 is connected to the temperature sensing nozzle 2 through a delivery pipeline 5, and the delivery pipeline 5 is provided with a solenoid valve 7; the thermocouple 3 is installed at the bottom of the metal shell 1, and the alarm system 9 is installed on the outside of the metal shell 1; the controller 6 is electrically connected to the thermocouple 3, the alarm device and the solenoid valve 7.

[0023] Thermocouple 3 is positioned around the lithium battery to monitor its temperature in real time. When the thermocouple 3 detects that the battery's temperature has risen to a first threshold, controller 6 immediately opens solenoid valve 7. If the battery's temperature continues to rise to a second threshold, temperature-sensing sprinkler head 2 quickly senses this and triggers the water supply system 4. Water flows through temperature-sensing sprinkler head 2, spraying onto the battery's surface, forming a water mist layer covering the battery. This mist layer rapidly lowers the battery's surface temperature, suppressing the spread of flames and preventing further thermal runaway. This allows the fire extinguishing system to quickly cover the area above the battery, extinguishing the fire and preventing its spread. Furthermore, since temperature-sensing sprinkler head 2 cannot be closed once opened, the thermocouple 3 and solenoid valve 7 remain closed until the battery's temperature reaches the first threshold. Even if the temperature-sensing sprinkler head 2 is mistakenly triggered, water will not be sprayed, preventing damage caused by the temperature-sensing sprinkler head 2 being mistakenly triggered.

[0024] Furthermore, after fire extinguishing is complete, the battery temperature drops. Controller 6 monitors the battery temperature and, when the temperature returns to normal, sends a reset signal, closing solenoid valve 7 and terminating the water spray operation, preventing excessive fire extinguishing and water waste. Furthermore, if thermal runaway occurs, controller 6 can activate alarm system 9 to issue an alarm signal. This device also features an early warning mechanism that automatically sends an alarm message to the user upon detecting abnormal battery temperature, alerting them to potential risks. Once the battery temperature stabilizes within a safe range and the fire extinguishing operation is complete, controller 6 deactivates the alarm, notifying the user that the system has returned to normal and the alarm has been resolved.

[0025] Temperature-sensing nozzle 2, mounted on top of metal housing 1, directly senses temperature changes on the battery top. Designed to quickly detect and spray water when the battery surface temperature exceeds a second threshold (typically set at 70°C), Temperature-sensing nozzle 2 is not only highly sensitive but also fast-responding. When a temperature anomaly is detected, it reacts quickly, effectively controlling the fire.

[0026] During the process of spraying water to extinguish the fire, the controller 6 continues to monitor the temperature changes of the battery through the thermocouple 3. According to the real-time data of the temperature change, the controller 6 dynamically adjusts the intensity and time of the water spray by controlling the solenoid valve 7 to ensure that the temperature returns to a safe range.

[0027] The automatic fire extinguishing device for battery charging thermal runaway in the embodiment of the present application places the lithium battery in a metal casing during charging. The device effectively monitors the temperature changes of the lithium battery through a thermocouple and a temperature-sensing nozzle. When the lithium battery experiences thermal runaway, the fire extinguishing system is quickly activated to prevent fires. Furthermore, the thermocouple and solenoid valve cooperate to prevent the temperature-sensing nozzle from being triggered accidentally, thereby preventing damage caused by incorrect water spraying. After extinguishing the fire, the solenoid valve 7 is closed to prevent excessive fire extinguishing and waste of water resources.

[0028] In some embodiments, the water supply system 4 includes a water tank, a water supply pipe and a faucet. The water tank is connected to the faucet through the water supply pipe, and the faucet is connected to the delivery pipeline 5.

[0029] The water tank stores an appropriate amount of fire-fighting water. The design of the water tank takes into account the balance between volume and capacity, which can provide sufficient fire-fighting water in an emergency without taking up too much space.

[0030] In some embodiments, the automatic fire extinguishing device further includes a drain pipe and a drain valve 10 . The drain pipe is installed on one side of the metal shell 1 , and the drain valve 10 is installed on the drain pipe. The drain valve 10 is connected to the controller 6 .

[0031] Thereby, the water in the metal casing can be drained out through the drain pipe and the drain valve.

[0032] In some embodiments, the automatic fire extinguishing device further includes a metal float 8 , and a float valve is further provided on the delivery pipeline 5 . The metal float 8 is connected to the float valve to control the opening and closing of the float valve according to the water level.

[0033] In this embodiment, to prevent overflow of water from within the metal housing 1 due to the water spraying operation, a metal float 8 is provided. The position of the metal float 8 controls the opening and closing of the float valve, thereby controlling the flow of water in the delivery pipeline 5 and preventing overflow. When the water level exceeds a safe limit, the metal float 8 automatically closes the float valve, disconnecting the water flow from the delivery pipeline 5 and preventing overflow. Simultaneously, the drain valve 10 is activated. This design not only improves the safety of the device but also ensures efficient water use during the firefighting process, avoiding unnecessary water waste.

[0034] In some embodiments, a through hole is provided on the upper portion of the metal shell 1, and the through hole is used to pass the charging plug. Thus, when charging, the charging plug is connected to the lithium battery for charging.

[0035] In some embodiments, the top cover of the metal housing 1 can be opened by hinges or hinges, and a sealing strip is provided around the top cover, thereby facilitating opening the top cover and placing the battery in the metal housing.

[0036] In some embodiments, the size of the metal shell 1 can be any box size that can fully accommodate the electric bicycle battery. Optionally, the length, width and height of the metal shell 1 are 600mm×400mm×400mm respectively to provide a suitable charging space for charging the lithium battery.

[0037] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the contents disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0038] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An automatic fire extinguishing device for battery charging thermal runaway, characterized in that: It includes a metal shell, a fire extinguishing system, a thermocouple, an alarm device and a controller; the metal shell includes a charging space for accommodating the lithium battery of an electric bicycle; the fire extinguishing system is installed on the top of the metal shell, and the fire extinguishing system includes a water supply system and a temperature-sensitive nozzle. The water supply system is connected to the temperature-sensitive nozzle through a delivery pipeline, and a solenoid valve is provided on the delivery pipeline; the thermocouple is installed at the bottom of the metal shell, and the alarm system is installed on the outside of the metal shell; the controller is electrically connected to the thermocouple, the alarm device and the solenoid valve. When the temperature-sensitive nozzle is triggered, the water flow of the water supply system passes through the temperature-sensitive nozzle to spray water, spraying onto the surface of the lithium battery, forming a water mist layer covering the top of the battery.

2. The automatic fire extinguishing device for battery charging thermal runaway according to claim 1, characterized in that: The water supply system includes a water tank, a water supply pipe and a faucet. The water tank is connected to the faucet through the water supply pipe, and the faucet is connected to the delivery pipeline.

3. The automatic fire extinguishing device for battery charging thermal runaway according to claim 2, characterized in that: The automatic fire extinguishing device further comprises a metal float, and a float valve is further provided on the delivery pipeline. The metal float is connected to the float valve to control the opening and closing of the float valve according to the water level.

4. The automatic fire extinguishing device for battery charging thermal runaway according to claim 1, characterized in that: The automatic fire extinguishing device further includes a drain pipe and a drain valve. The drain pipe is installed on one side of the metal shell, the drain valve is installed on the drain pipe, and the drain valve is connected to the controller.

5. The automatic fire extinguishing device for battery charging thermal runaway according to claim 1, characterized in that: A through hole is provided on the upper portion of the metal shell, and the through hole is used to pass the charging plug.

6. The automatic fire extinguishing device for battery charging thermal runaway according to claim 1, characterized in that: The top cover of the metal shell can be opened by hinges or hinges, and a sealing strip is arranged around the top cover.

7. The automatic fire extinguishing device for battery charging thermal runaway according to claim 1, characterized in that: The length, width and height of the metal shell are 600mm×400mm×400mm respectively.

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