Liquid-cooled battery box with fire suppression system

Abstract

The utility model discloses a liquid -cooled battery box with fire extinguishing system, including box and the battery module of built -in in it, still be equipped with the light sense probe in the box, and with the fire extinguishing device of light sense probe signal connection, the light sense probe is directly opposite the connecting position of battery module in pole and copper aluminium row. Through the connecting position of battery module in pole and copper aluminium row of light sense probe direct alignment, light sense probe can directly and real -time monitoring the flame and flash signal of the fire point. Since the transmission speed of light is faster than the transmission rate of temperature, so the efficiency of monitoring the fire by using light sense probe can improve the response efficiency of fire detection to a certain extent compared with the prior art of monitoring the fire by using temperature sensor, provides the critical time window for subsequent fire extinguishing action, and the utility model provides the required hardware basis for monitoring the fire by using light sense probe.

Description

Technical Field

[0001] This utility model mainly relates to the field of battery box technology, and in particular to liquid-cooled battery boxes. Background Technology

[0002] A liquid-cooled battery box is a sealed enclosure that uses liquid as a cooling medium for thermal management of the internal battery modules. Liquid-cooled battery boxes offer significant advantages in electric vehicles and energy storage systems, primarily in thermal management efficiency, safety, space utilization, and extended lifespan. By cooling the batteries through a liquid cooling system, the liquid-cooled battery box effectively reduces the battery's operating temperature, thereby improving battery efficiency and lifespan. It also provides a more uniform heat distribution, preventing localized overheating and reducing internal temperature differences within the battery, thus improving overall battery performance and stability. Furthermore, the design of a liquid-cooled battery box can reduce the battery's self-discharge rate, extending its lifespan.

[0003] The fire in a battery module typically originates at the connection between the terminal and the copper-aluminum busbar. Current technology often uses temperature sensors to monitor the fire, but these sensors are frequently located far from this connection point. Therefore, when a fire occurs, the temperature sensors struggle to detect temperature changes and activate the fire suppression system immediately.

[0004] Therefore, it is necessary to improve the existing fire extinguishing structure to provide a hardware foundation for improving the response efficiency of fire extinguishing devices. Utility Model Content

[0005] The technical problem this invention aims to solve is how to provide a hardware foundation for improving the response efficiency of fire extinguishing devices.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A liquid-cooled battery box with a fire extinguishing system includes a box body and battery modules built into it. The box body also houses a photosensitive probe for acquiring fire information and a fire extinguishing device connected to the photosensitive probe for spraying fire extinguishing agent onto the battery modules. The photosensitive probe is positioned directly opposite the connection point between the terminals and the copper-aluminum busbar in the battery module. By directly aligning the photosensitive probe with this connection point—the most flammable part of the battery module—the probe can directly and in real-time monitor the flames and flashes generated at the ignition point, thus capturing fire information at the earliest stage of a fire. Simultaneously, the photosensitive probe is connected to the fire extinguishing device; once the fire information captured by the probe is transmitted to the device, the fire extinguishing procedure is activated. Since light travels faster than heat, using a light sensor to monitor a fire is more efficient than using a temperature sensor, thus improving the response efficiency of fire detection and providing a critical time window for subsequent firefighting operations. This invention provides the necessary hardware foundation for using a light sensor to monitor a fire.

[0007] At least one side wall of the enclosure has a flow channel through which coolant flows to cool the battery module. This flow channel on the enclosure side wall provides a dedicated pathway for coolant flow, efficiently conducting heat dissipated by the battery module and removing it through coolant circulation, effectively maintaining a stable operating temperature for the battery module. Simultaneously, it reduces localized overheating of the battery module, not only aligning with the core advantages of liquid-cooled battery boxes but also mitigating the risk of fire caused by excessive temperature, indirectly assisting the fire suppression system in its function.

[0008] The enclosure includes a separate base and a cover. A flow channel is formed in the base, and the battery module is fitted to the base. The separate base and cover design facilitates the installation, removal, and subsequent maintenance of the battery module. By placing the flow channel in the base and ensuring the battery module is fitted to it, the heat generated by the battery module can be directly transferred to the coolant within the base's flow channel, improving heat dissipation efficiency and fully utilizing the cooling effect of the liquid cooling system.

[0009] The connection point between the terminal post and the copper-aluminum busbar is located at the top of the battery module, and several photosensitive probes are installed at intervals on the bottom surface of the top plate of the cover. Given that the fire point is located at the top of the battery module, installing the photosensitive probes on the bottom surface of the top plate of the cover ensures that the probes are at the shortest distance from the fire point without obstruction, enabling more sensitive and accurate detection of fire signals at the connection point between the terminal post and the copper-aluminum busbar. The spaced-out probes provide comprehensive coverage of multiple fire points on the top of the battery modules, avoiding blind spots and further improving the reliability and timeliness of fire detection.

[0010] The fire extinguishing device includes a fire extinguishing pipeline, sprinkler heads, and a controller. The input end of the fire extinguishing pipeline is connected to the flow channel, and the output end is equipped with a sprinkler head. The controller is connected to both the photosensitive probe and the sprinkler head signal. The design of connecting the fire extinguishing pipeline to the flow channel allows for a rational combination of the fire-fighting agent delivery channel and the liquid-cooled flow channel, eliminating the need for separate delivery pipelines and storage space, saving internal space and aligning with the space utilization advantages of the liquid-cooled battery box. The controller, acting as an intermediate hub, can quickly receive the fire signal transmitted by the photosensitive probe and immediately control the sprinkler head to start, reducing intermediate links in signal transmission and further shortening the response time of the fire extinguishing device, effectively solving the problem of delayed activation in existing fire extinguishing devices. It should be noted that the structure, connection method, and signal control method of the photosensitive probe, controller, and sprinkler head are all conventional technologies in this field and will not be elaborated upon here.

[0011] The fire extinguishing pipeline includes a riser and several horizontal branch pipes. The input end of the riser is connected to the flow channel, and its output end is connected to the input end of each of the horizontal branch pipes. The horizontal branch pipes are distributed radially, and sprinkler heads are installed at their output ends. The radially distributed horizontal branch pipes allow the sprinkler heads to evenly cover the battery modules in different locations inside the housing, expanding the fire extinguishing range. The structure of the riser connecting to the flow channel and linking to each horizontal branch pipe ensures that the fire extinguishing agent is quickly and evenly distributed to each horizontal branch pipe through the riser, ensuring a stable supply of fire extinguishing agent to each sprinkler head, improving the overall fire extinguishing efficiency and coverage of the fire extinguishing device, and ensuring that fires can be extinguished comprehensively and promptly when they occur.

[0012] The spray range of each sprinkler head covers the upper surface of the battery module. This arrangement avoids fire extinguishing blind spots; since the ignition point of the battery module is concentrated at the connection between the terminal post and the copper-aluminum busbar on the upper surface, the spray range of the sprinkler head covering the upper surface can directly and accurately spray the fire extinguishing agent to the ignition source, achieving targeted fire extinguishing and quickly suppressing the spread of fire; at the same time, the spray design covering the upper surface can also cool and protect the upper surface of the battery module that has not caught fire, preventing adjacent battery modules from being ignited due to high temperature, thus improving the protective effect of the fire extinguishing system.

[0013] The liquid-cooled battery box also includes support columns for fixing the horizontal branch pipes. The support columns provide stable support for the radially distributed horizontal branch pipes, preventing displacement of the horizontal branch pipes due to vibration or pressure impact during fire extinguishing agent delivery. This ensures that the sprinkler heads always maintain the preset spray angle and range, guaranteeing the stability and reliability of the fire extinguishing system. At the same time, the support columns also enhance the overall structural strength of the fire extinguishing pipeline, extending the service life of the fire extinguishing system. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a liquid-cooled battery box with a fire extinguishing system. Figure 2 This is a schematic diagram of the assembly of the base and the fire extinguishing device; Figure 3 yes Figure 2 Schematic diagram of the cross section at point AA; Figure 4 This is a schematic diagram of the structure of the lower plate of the flow channel; Figure 5 This is a schematic diagram of the assembly of the box cover and the light sensor.

[0015] The labels in the diagram represent: 1. Housing; 11. Flow channel; 12. Base; 121. Upper plate of flow channel; 122. Lower plate of flow channel; 123. Flow channel groove; 124. Support beam frame; 13. Housing cover; 131. Top plate; 132. Side plate; 2. Battery module; 3. Optical sensor; 4. Fire extinguishing equipment; 41. Fire extinguishing pipes; 411. Riser pipes; 412. Horizontal branch pipes; 42. Sprinkler heads; 43. Controllers; 5. Support columns. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example like Figures 1 to 5 As shown in this embodiment, the liquid-cooled battery box with a fire extinguishing system includes a box body 1 and a battery module 2 built into it. The box body 1 is also equipped with a light sensor 3 for obtaining fire information, and a fire extinguishing device 4 connected to the light sensor 3 for spraying fire extinguishing agent onto the battery module 2. The light sensor 3 is directly opposite the connection position between the terminal post and the copper-aluminum busbar in the battery module 2.

[0018] In this embodiment, the housing 1 is configured as a rectangular shell structure made of aluminum alloy or high-strength steel, including a split base 12 and a cover 13. The base 12 consists of an upper flow channel plate 121 and a lower flow channel plate 122. The lower flow channel plate 122 is formed with a serpentine flow channel groove 123. The upper flow channel plate 121 covers the upper surface of the lower flow channel plate 122, and the two are connected as a whole by brazing. The flow channel groove 123 is closed by the upper flow channel plate 121 to form a flow channel 11. One end of the flow channel 11 is connected to the coolant inlet, and the other end is connected to the coolant outlet. The coolant (using ethylene glycol aqueous solution) used to cool the battery module 2 flows in the flow channel 11, thereby dissipating the heat generated by the battery module 2. Thermally conductive aerogel is dotted on the upper surface of the base 12. The battery module 2 is tightly attached to the base 12 through the thermally conductive aerogel, thereby achieving a stable connection and ensuring rapid heat transfer. On the lower surface of the base 12, a support beam frame 124 is fixed along its four sides by rivet nuts. By setting the support beam frame 124, the upper flow channel plate 121 and the lower flow channel plate 122 can be reinforced, thereby avoiding or reducing the deformation of the base 12. Specifically, the cover 13 includes a rectangular top plate 131 and four side plates 132 extending downward along the four sides of the top plate 131. Twelve light sensors 3 are installed in an array on the bottom surface of the top plate 131, and the light sensors 3 are directly opposite the connection position between the terminal post and the copper-aluminum busbar formed on the top of the battery module 2.

[0019] In this embodiment, the fire extinguishing device 4 includes a fire extinguishing pipe 41, a sprinkler head 42, and a controller 43. The fire extinguishing pipe 41 includes a riser 411 and several horizontal branch pipes 412. An opening communicating with the flow channel 11 is formed at the center of the upper plate 121 of the flow channel. A connector is installed on this opening, which is connected to the bottom end of the riser 411. The top end of the riser 411 is connected to the input end of each horizontal branch pipe 412. The horizontal branch pipes 412 are radially distributed, and sprinkler heads 42 are installed at their output ends. The spray range of each sprinkler head 42 covers the upper surface of the battery module 2. Specifically, the controller 43 is connected to the photosensitive probe 3 and the sprinkler head 42 respectively. More specifically, the liquid-cooled battery box also includes several support columns 5, each of which is connected to the base 12 and the horizontal branch pipes 412 respectively.

[0020] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A liquid-cooled battery box with a fire extinguishing system, comprising a box body (1) and a battery module (2) built therein, characterized in that: The housing (1) is also equipped with a light sensor (3) for obtaining fire information, and a fire extinguishing device (4) connected to the light sensor (3) for spraying fire extinguishing agent onto the battery module (2); the light sensor (3) is directly opposite the connection position between the electrode post and the copper-aluminum busbar in the battery module (2).

2. The liquid-cooled battery box with a fire extinguishing system according to claim 1, characterized in that: At least one side wall of the housing (1) is formed with a flow channel (11) in which coolant for cooling the battery module (2) flows.

3. The liquid-cooled battery box with a fire extinguishing system according to claim 2, characterized in that: The housing (1) includes a split base (12) and a cover (13), a flow channel (11) is formed on the base (12), and the battery module (2) is attached to the base (12).

4. The liquid-cooled battery box with a fire extinguishing system according to claim 3, characterized in that: The connection point between the terminal post and the copper-aluminum busbar is located at the top of the battery module (2), and several light sensors (3) are installed at intervals on the bottom surface of the top plate (131) of the cover (13).

5. The liquid-cooled battery box with a fire extinguishing system according to claim 1, characterized in that: The fire extinguishing device (4) includes a fire extinguishing pipe (41), a sprinkler head (42) and a controller (43); the input end of the fire extinguishing pipe (41) is connected to the flow channel (11), and the output end is equipped with a sprinkler head (42); the controller (43) is connected to the light sensor (3) and the sprinkler head (42) respectively.

6. The liquid-cooled battery box with a fire extinguishing system according to claim 5, characterized in that: The fire extinguishing pipe (41) includes a riser (411) and several horizontal branch pipes (412); the input end of the riser (411) is connected to the flow channel (11), and its output end is connected to the input end of each of the horizontal branch pipes (412); the horizontal branch pipes (412) are radially distributed, and their output ends are equipped with sprinkler heads (42).

7. The liquid-cooled battery box with a fire extinguishing system according to claim 6, characterized in that: The spray range of each of the water spray nozzles (42) covers the upper surface of the battery module (2).

8. The liquid-cooled battery box with a fire extinguishing system according to claim 6 or 7, characterized in that: The liquid-cooled battery box also includes a support column (5) for fixing the horizontal branch pipe (412).

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