Fire extinguishing structure of battery box

Abstract

The utility model provides a fire extinguishing structure of a battery box, which is provided with a box body, at least one first space is defined by a plurality of side plate frames of the box body and is used for accommodating and positioning at least one battery core module and at least one fire extinguisher, any fire extinguisher is provided with a valve, and the valve is communicated with at least one jet orifice. The at least one jet orifice is located above the at least one battery core module, and the jet direction of the at least one jet orifice faces the top end of the at least one battery core module; and the at least one sensor is positioned above the at least one battery core module and is connected with the valve, so that when the high temperature in the battery box is sensed, the valve can be automatically opened, and a fire extinguishing agent in the at least one fire extinguisher is sprayed outwards through the at least one jet orifice so as to carry out a fire extinguishing action in time.

Description

Technical Field

[0001] This utility model relates to a fire extinguishing structure for a battery box, and more particularly to a structure that can automatically spray fire extinguishing agent to immediately extinguish a fire when a high temperature is sensed inside the battery box. Background Technology

[0002] Currently used battery boxes primarily consist of multiple battery cells connected in parallel or series inside a box. These battery cells are electrochemically synthesized. The outside of the box has a positive electrode post and a negative electrode post, which, after being connected to conductive terminals, output a fixed current or voltage. When multiple battery boxes are assembled vertically or horizontally into an energy storage system, they can provide sufficient DC power to mobile equipment such as electric vehicles or stationary equipment such as large machinery. For safety reasons, current fire extinguishing methods involve placing a fire extinguisher around the battery box. This allows for manual activation of the extinguisher to spray extinguishing agent in the event of a fire caused by thermal runaway due to a short circuit in a lithium battery cell.

[0003] However, multiple battery cells are arranged in parallel or series inside the casing. When a lithium battery cell catches fire due to a short circuit and generates high temperature, the fire extinguisher outside the battery box cannot directly extinguish the fire at the ignition point of the battery cell. Instead, it can only spray the extinguishing agent on the outer surface of the casing and wait for the multiple battery cells to burn out. As a result, it is not only impossible to extinguish the flames immediately when the lithium battery cell starts to catch fire to prevent further spread of the fire, but there is also a risk that all the battery cells will be completely burned, and the fire will further spread to mobile equipment such as electric vehicles or fixed equipment such as large machinery. Utility Model Content

[0004] In view of this, in order to provide a structure different from conventional technology and to improve the above-mentioned shortcomings, the purpose of this utility model is to provide a fire extinguishing structure for a battery box, so as to solve the problem that conventional fire extinguishers can only spray the extinguishing agent on the outer surface of the battery box manually, and cannot extinguish the flames inside the battery box in time, thus preventing all battery cells from being completely burned or the fire from spreading. The present invention can accommodate at least one fire extinguisher and at least one battery cell module in a box, with at least one nozzle pointing towards the top of the battery cell module, and a sensor positioned above the battery cell module. When the sensor detects a high temperature, a valve can be automatically opened, allowing the extinguishing agent in the fire extinguisher to be sprayed through at least one nozzle onto the burning battery cell module, immediately covering and extinguishing the flames, thus ensuring safe use.

[0005] To achieve the aforementioned objectives, this utility model provides a fire extinguishing structure for a battery box, mainly comprising a box body, at least one fire extinguisher, and at least one sensor. The box body has a plurality of side plates, which enclose at least one first space for accommodating and positioning at least one battery cell module. The at least one fire extinguisher is correspondingly housed within the at least one first space. Each fire extinguisher has a valve connected to at least one nozzle, which is located above the at least one battery cell module, and the spray direction of the at least one nozzle is towards the top of the at least one battery cell module. The at least one sensor is located above the at least one battery cell module and is connected to the valve to sense high temperatures to open the valve, allowing the extinguishing agent in the at least one fire extinguisher to be sprayed outward through the at least one nozzle.

[0006] In practice, the box is rectangular, with the opposite ends along the length of the box defined as the front end and the rear end, respectively. The box has four side panels, which surround the front end and the rear end to form at least one first space. Each first space includes a second space and a third space, which are arranged along the length of the box. The second space can accommodate any battery cell module, and the third space can accommodate at least one fire extinguisher.

[0007] In practice, at least one battery cell module includes two rows of parallel first battery cell modules and a second battery cell module, with at least one injection port located above the first battery cell module and the second battery cell module, and the injection direction of the at least one injection port facing the top of the first battery cell module and the second battery cell module, respectively.

[0008] When implemented, the fire extinguisher includes a body and a valve. One end of the body has an outlet end. The valve includes an adapter and a switching element. The adapter has a pipe for connecting the outlet end and at least one spray nozzle. The switching element is movably positioned within the pipe for switching the pipe to a closed or connected state with at least one spray nozzle.

[0009] In implementation, the adapter includes a valve body and a sleeve. One end of the valve body is connected to the outlet end, and the other end of the valve body has a first connecting part. One end of the sleeve has a second connecting part for connecting to the first connecting part. The other end of the sleeve has at least one pipe joint and a limiting space. The at least one pipe joint is correspondingly connected to at least one injection port. The limiting space is connected to a pipeline, and the adapter is movably positioned within the limiting space.

[0010] In practice, this utility model further includes a cap, one end of which is connected to the other end of the sleeve portion, and the other end of the cap has a through hole and a support portion; the sensor is an elongated temperature-sensing glass tube, the support portion supports the positioning sensor, and one end of the sensor presses against the through hole; the sleeve portion has a blocking portion inside one end; the switching member includes a piston and an elastic member, one end of the piston has a piston rod, the piston rod passes through the through hole, and one end of the piston rod presses against one end of the sensor; one end of the elastic member presses against the other end of the piston, and the other end of the elastic member presses against the blocking portion, so that the switching member is movably positioned within the limiting space.

[0011] In practice, at least one side of the adapter is connected to at least one long pipe fitting, and the at least one long pipe fitting has at least one injection port.

[0012] In practice, the battery cell module includes a plurality of battery cells arranged side by side, and each long tube has a plurality of injection ports arranged at intervals along its axial direction, with the plurality of injection ports respectively positioned above the plurality of battery cells.

[0013] When a sensor detects a high temperature, this invention can automatically open a valve, allowing the extinguishing agent in the fire extinguisher to be sprayed through at least one nozzle onto the top of a burning battery cell module, so as to immediately cover and extinguish the flames, thereby ensuring safe use.

[0014] To facilitate a deeper understanding of this utility model, it is described in detail below. Attached Figure Description

[0015] Figure 1 This is an exploded perspective view of a preferred embodiment of the present invention.

[0016] Figure 2 This is an exploded view of the fire extinguisher and sensor components according to a preferred embodiment of the present invention.

[0017] Figure 3 This is a cross-sectional schematic diagram of the fire extinguisher and sensor according to a preferred embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram illustrating the usage state of a preferred embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1-Fire extinguishing structure of the battery box; 2-Box body; 21-Side panel; 22-Baffle; 23, 23'-First space; 231, 231'-Second space; 232, 232'-Third space; 24-First battery cell module; 24'-Second battery cell module; 25, 25'-Battery cell; 251, 251'-Pressure relief port; 3, 3'-Fire extinguisher assembly; 31-Body; 310-Fire extinguisher; 311-Outlet end; 32-Valve; 33, 33'-Long pipe fittings ; 331, 331' - Injection port; 34 - Adapter; 341 - Pipe; 342 - Valve body; 343 - Sleeve part; 344 - Switch knob; 345 - Pressure gauge; 346 - First connection part; 347 - Second connection part; 348 - Limiting space; 349, 349' - Pipe connector; 340 - Blocking part; 35 - Cap; 351 - Perforation; 352 - Support part; 36 - Switching part; 361 - Piston; 362 - Elastic element; 363 - Piston rod; 4, 4' - Sensor. Detailed Implementation

[0020] This utility model provides a fire extinguishing structure for a battery box, mainly including a box body, at least one fire extinguisher, and at least one sensor. The box body has a plurality of side plates, which enclose at least one first space to accommodate and position at least one battery cell module. The at least one fire extinguisher is correspondingly housed in the at least one first space. Each fire extinguisher has a valve connected to at least one nozzle. The at least one nozzle is located above the at least one battery cell module, and the spray direction of the at least one nozzle is towards the top of the at least one battery cell module. The at least one sensor is located above the at least one battery cell module and is connected to the valve to sense the high temperature inside the box to open the valve, allowing the extinguishing agent in the at least one fire extinguisher to be sprayed outward through the at least one nozzle for immediate fire extinguishing.

[0021] Please see Figure 1As shown, this is a preferred embodiment of the fire extinguishing structure 1 of the battery box of this utility model, mainly including a box body 2, two fire extinguisher sets 3, 3' and two sensors 4, 4'. The box body 2 is a rectangular cube, with opposite ends along its length defined as the front end and the rear end, respectively. Four side panels 21 surround the front end and the rear end. A partition 22 connects the inner sides of the front end and the rear end side panels 21 to the two ends, thereby dividing the interior of the box body 2 into two first spaces 23, 23'. Each of the first spaces 23, 23' includes a second space 231, 231' and a third space 232, 232'. The two second spaces 231, 231' and the two third spaces 232, 232' are arranged continuously along the length of the box body 2, and the two second spaces 231, 231' are formed at the front end of the two third spaces 232, 232'. Among them, the second space 231 of the first space 23 accommodates and positions a first battery cell module 24, and the third space 232 accommodates and positions a fire extinguisher assembly 3; the second space 231' of the other first space 23' accommodates and positions a second battery cell module 24', and the third space 232' is for accommodating and positioning another fire extinguisher assembly 3'; in addition, the first battery cell module 24 and the second battery cell module 24' are arranged side by side, and the first battery cell module 24 and the second battery cell module 24' each include a plurality of battery cells 25, 25' arranged side by side, and each battery cell 25, 25' has a pressure relief port 251, 251' on its top surface.

[0022] The two fire extinguisher assemblies 3 and 3' and the two sensors 4 and 4' have the same structure. The two fire extinguisher assemblies 3 and 3' are respectively housed in two third spaces 232 and 232', and the two sensors 4 and 4' are respectively located above the first battery cell module 24 and the second battery cell module 24'. The following is an example of a fire extinguisher assembly 3 paired with a sensor 4.

[0023] like Figure 2 , Figure 3As shown, the fire extinguisher assembly 3 mainly includes a body 31, a valve 32, and two long pipe fittings 33 and 33'. The body 31 includes four parallel canister-shaped fire extinguishers 310, each with an outlet end 311 at its top for filling or spraying extinguishing agent. In practice, the body 31 may also include one canister-shaped fire extinguisher 310. The valve 32 mainly includes a connector 34, a cap 35, and a switching element 36. The connector 34 has a pipe 341 inside, and the connector... 34 includes a valve body 342 and a sleeve portion 343. The valve body 342 is connected to the outlet end 311 around its periphery. A switch knob 344 is locked to the top of the valve body 342 so that, after being turned, the bottom end of the switch knob 344 blocks the connection of the pipe 341 or allows the fire extinguishing agent to pass through the pipe 341. A pressure gauge 345 is locked to one side of the valve body 342 so as to sense the pressure inside the body 31. The other side of the valve body 342 has an external helical tube, which serves as the first connecting part 346.

[0024] One end of the sleeve portion 343 has an internal threaded hole for locking the external threaded tube of the valve body 342. In practice, this internal threaded hole serves as a second connecting portion 347. The other end of the sleeve portion 343 has a limiting space 348 and two pipe joints 349 and 349'. The limiting space 348 is a circular groove inside the sleeve portion 343. The limiting space 348 connects to the pipe 341 of the adapter 34. One axial end of the limiting space 348 has a radially inwardly protruding inner ring, which serves as a blocking portion 3. 40; Two pipe joints 349 and 349' are respectively connected to the radial sides of the sleeve portion 343, so that one end of the two pipe joints 349 and 349' is respectively connected to the limiting space 348; One end of the cap 35 is locked to the other end of the sleeve portion 343, and the other end of the cap 35 has a through hole 351 and a bracket portion 352; The sensor 4 is an elongated temperature-sensing glass tube, and the sensor 4 is supported and positioned by the bracket portion 352, and one end of the sensor 4 is pressed against the position of the through hole 351.

[0025] The switching member 36 includes a piston 361 and an elastic member 362. One end of the piston 361 has a piston rod 363. One end of the piston rod 363 passes through the through hole 351 of the cap 35 and presses against one end of the sensor 4. The elastic member 362 is a compression spring. One end of the elastic member 362 presses against the other end of the piston 361, and the other end of the elastic member 362 presses against the blocking part 340 in the sleeve part 343, so that the switching member 36 is movably positioned in the limiting space 348 of the sleeve part 343.

[0026] One end of each of the two long tubes 33 and 33' is locked and connected to the other end of each of the two pipe joints 349 and 349'. The two long tubes 33 and 33' have a plurality of spray nozzles 331 and 331' arranged at intervals along their axial direction. The plurality of spray nozzles 331 and 331' are respectively positioned above the plurality of battery cells 25 of the first battery cell module 24, and the spray direction of the plurality of spray nozzles 331 and 331' is respectively towards the pressure relief port 251 on the top surface of the first battery cell module 24.

[0027] In this way, such as Figures 1-4 As shown, when one of the battery cells 25 in the first battery cell module 24 catches fire due to a short circuit and generates high temperature, the sensor 4 will automatically burst the temperature-sensing glass tube when it detects a predetermined temperature, such as above 90°C. Through the elastic force of the elastic member 362, the piston rod 363 will pass through the perforation 351 of the cap 35, and the piston 361 will move linearly within the limiting space 348. This will allow the fire extinguishing agent to pass through the limiting space 348 and then be sprayed downwards from the plurality of spray nozzles 331 and 331' of the two long tubes 33 and 33' onto the top of the plurality of battery cells 25. The fire extinguishing agent will cover the top surface of the plurality of battery cells 25 and seep into the interior of the battery cell 25 through the pressure relief port 251 of the battery cell 25 to immediately cover and extinguish the flames. When one of the battery cells 25' of the second battery cell module 24' catches fire due to a short circuit, and the sensor 4' detects a high temperature of over 90°C and automatically explodes, the extinguishing agent from another fire extinguisher group 3' can be sprayed downwards onto the multiple battery cells 25', which can also immediately cover and extinguish the flames generated by the second battery cell module 24'.

[0028] In summary, based on the above-disclosed content, this utility model can indeed achieve the intended purpose. When a sensor detects a high temperature, it can automatically open the valve, allowing the extinguishing agent in the fire extinguisher to be sprayed through at least one nozzle onto the top of a burning battery cell module, so as to immediately cover and extinguish the flames, thereby ensuring safe use.

[0029] While this utility model discloses preferred embodiments to achieve the above objectives, it is not intended to limit the structural features of this utility model. Anyone skilled in the art should know that any easily conceivable variations or modifications are possible under the technical spirit of this utility model and are covered by the protection scope of this utility model.

Claims

1. A fire extinguishing structure of a battery case, characterized by comprising: include: A housing having a plurality of side panels that frame at least one first space for accommodating and positioning at least one battery cell module. At least one fire extinguisher is correspondingly housed within the at least one first space, each of the fire extinguishers having a valve that connects to at least one nozzle, the at least one nozzle being located above the at least one battery cell module and the spraying direction of the at least one nozzle being toward the top of the at least one battery cell module. as well as At least one sensor is located above the at least one battery cell module. The at least one sensor is connected to the valve to sense high temperature to open the valve, allowing the extinguishing agent in the at least one fire extinguisher to be sprayed outward through the at least one nozzle.

2. The battery case fire extinguishing structure according to claim 1, wherein: The box is rectangular, with opposite ends along its length defined as the front and rear ends. The box has four side panels that frame the front and rear ends to form at least one first space. Each of the first spaces includes a second space and a third space, which are arranged along the length of the box. The second space contains any of the battery cell modules, and the third space contains at least one fire extinguisher.

3. The battery case fire extinguishing structure according to claim 1, wherein: The at least one battery cell module includes two rows of parallel first battery cell modules and a second battery cell module. The at least one injection port is located above the first battery cell module and the second battery cell module, and the injection direction of the at least one injection port is directed toward the top of the first battery cell module and the second battery cell module, respectively.

4. The fire extinguishing structure for a battery pack according to claim 1, wherein: The fire extinguisher includes a body and the valve. One end of the body has an outlet. The valve includes an adapter and a switching element. The adapter has a pipe for connecting the outlet and the at least one spray nozzle. The switching element is movably positioned within the pipe for switching the pipe to a closed or connected state with the at least one spray nozzle.

5. The fire extinguishing structure for a battery pack according to claim 4, wherein: The adapter includes a valve body and a sleeve. One end of the valve body is connected to the outlet end, and the other end of the valve body has a first connecting portion. One end of the sleeve has a second connecting portion for connecting to the first connecting portion. The other end of the sleeve has at least one pipe joint and a limiting space. The at least one pipe joint is correspondingly connected to the at least one injection port. The limiting space is connected to the pipeline, and the adapter is movably positioned within the limiting space.

6. The fire extinguishing structure for a battery pack according to claim 5, wherein: It also includes a cap, one end of which is connected to the other end of the sleeve portion. The other end of the cap has a through hole and a support portion. The sensor is an elongated temperature-sensing glass tube. The support portion supports and positions the sensor, and one end of the sensor presses against the through hole. The sleeve portion has a blocking portion inside its end. The switching member includes a piston and an elastic member. One end of the piston has a piston rod that passes through the through hole and one end of the piston rod presses against the end of the sensor. One end of the elastic member presses against the other end of the piston, and the other end of the elastic member presses against the blocking portion, so that the switching member can be movably positioned within the limiting space.

7. The fire extinguishing structure for a battery pack according to claim 4 or 5 or 6, wherein: The adapter is connected to at least one long pipe on at least one side, the at least one long pipe having the at least one injection port.

8. The battery case fire extinguishing structure according to claim 7, wherein: The battery cell module includes a plurality of battery cells arranged side by side, and the axis direction of any long pipe has a plurality of spray ports arranged at intervals, and the plurality of spray ports correspond to the plurality of battery cells arranged above.

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