Battery pack fire extinguishing structure and vehicle

Abstract

The utility model discloses a battery pack fire extinguishing structure and a vehicle. The battery pack fire extinguishing structure comprises a shell, a liquid guide pipeline and an ejection assembly, and a containing cavity is defined by the shell; the liquid guide pipeline is provided with a first end for the fire-fighting liquid to flow in and a second end for the fire-fighting liquid to flow out, the liquid guide pipeline has a compressed state and an unfolded state, the liquid guide pipeline is located in the containing cavity when the liquid guide pipeline is in the compressed state, and the first end extends out of the containing cavity when the liquid guide pipeline is in the unfolded state; the ejection assembly comprises a limiting piece and a driving piece, the limiting piece is configured to act on the liquid guide pipeline to keep the liquid guide pipeline in the compressed state, and the driving piece is configured to drive the liquid guide pipeline to be switched from the compressed state to the unfolded state after the limiting piece releases limitation. And by arranging the battery pack fire extinguishing structure, the safety distance of fire fighting is guaranteed, firefighters are prevented from conducting pipeline butt joint operation in the high-temperature dense smoke environment, the pipeline butt joint difficulty is lowered, and high safety is achieved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a battery pack fire extinguishing structure and vehicle. Background Technology

[0002] After a vehicle catches fire, the high-temperature source inside the power battery is protected by the battery compartment and battery casing. Firefighters often cannot directly spray fire extinguishing agents onto the power battery to cool it down, resulting in poor fire extinguishing effect and inability to stop the further spread of thermal runaway of the power battery in time.

[0003] In related technologies, the vehicle body is equipped with a valve that connects to the inside of the battery. In the event of thermal runaway, a fire extinguishing agent can be injected into the battery through this valve, thereby achieving precise and efficient fire suppression. However, in the event of thermal runaway, firefighters need to approach the vehicle body and connect the fire hoses to the valve, an operation that is quite difficult and carries a high safety risk. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack fire extinguishing structure that ensures a safe distance for firefighting, avoids firefighters performing pipe connection operations in high-temperature, dense smoke environments, reduces the difficulty of pipe connection, and has a high level of safety.

[0005] This utility model also proposes a vehicle having the above-mentioned battery pack fire extinguishing structure.

[0006] The battery pack fire extinguishing structure according to a first aspect embodiment of the present invention includes:

[0007] A housing that defines a receiving cavity;

[0008] A liquid guiding conduit has a first end for supplying fire-fighting liquid inflow and a second end for supplying fire-fighting liquid outflow. The liquid guiding conduit has a compressed state and an extended state. When the liquid guiding conduit is in the compressed state, it is located inside the receiving cavity. When the liquid guiding conduit is in the extended state, the first end extends out of the receiving cavity.

[0009] The battery pack fire extinguishing structure further includes an ejection assembly, which includes a restraining member and a driving member. The restraining member is configured to act on the liquid guiding pipe to keep the liquid guiding pipe in the compressed state, and the driving member is configured to drive the liquid guiding pipe to switch from the compressed state to the deployed state when the restraining member is released.

[0010] The battery pack fire extinguishing structure according to the embodiment of this utility model has at least the following beneficial effects:

[0011] The battery pack fire extinguishing structure ensures a safe distance for firefighters, avoiding the need for pipe connection operations in high-temperature, dense smoke environments, reducing the difficulty of pipe connection, and providing high safety. When the battery pack fire extinguishing structure of this application is applied to a vehicle, if the vehicle experiences a risk of thermal runaway, the ejection assembly can propel the liquid-conducting pipe outside the vehicle body. After the liquid-conducting pipe is ejected, firefighters can connect the fire extinguishing pipe and the liquid-conducting pipe without approaching the vehicle. This allows the extinguishing agent in the fire extinguishing pipe to be injected into the power battery through the liquid-conducting pipe, achieving precise cooling and fire extinguishing, effectively curbing the spread of thermal runaway and preventing further fire escalation.

[0012] According to some embodiments of the present invention, the driving member is configured to drive the first end to move after the limiting member is released, so as to switch the liquid guiding pipe from the compressed state to the unfolded state.

[0013] According to some embodiments of the present invention, the liquid guiding pipe in the unfolded state includes at least one variable diameter section, the variable diameter section includes multiple rings of different sizes, and the rings are arranged in order from small to large or from large to small along the extension direction of the liquid guiding pipe; when the liquid guiding pipe is in the compressed state, the rings of the same variable diameter section are sequentially nested in order from small to large along the direction from the inside to the outside.

[0014] According to some embodiments of the present invention, the liquid guiding pipe forms a wound structure under the compressed state, with one of the first end and the second end located at the innermost circle of the wound structure and the other located at the outermost circle of the wound structure.

[0015] Alternatively, the fluid guiding pipe forms a stacked structure under the compressed state. The stacked structure includes a plurality of alternately arranged bent segments and straight segments, with each straight segment stacked on top of the others. One of the straight segments located at both ends forms the first end, and the other forms the second end.

[0016] According to some embodiments of the present invention, the limiting member is a rope, the two ends of which are respectively connected to the housing, and the rope is wound around the liquid guiding pipe to keep the liquid guiding pipe in the compressed state;

[0017] The battery pack fire extinguishing structure also includes a breaker configured to disconnect the rope.

[0018] According to some embodiments of the present invention, the battery pack fire extinguishing structure further includes a fixing member, and at least one end of the rope is connected to the outside of the housing through the fixing member.

[0019] According to some embodiments of the present invention, the housing also has an opening for the liquid guiding pipe to extend out, and the battery pack fire extinguishing structure further includes an end cap and a connector, the end cap being connected to the housing;

[0020] When the fluid conduit is in the compressed state, the connector is connected to the rope and the end cap respectively, so that the end cap closes the opening. When the rope is broken by the breaking member, the end cap can open the opening.

[0021] According to some embodiments of the present invention, the housing further has an opening for the liquid guiding pipe to extend out, and the limiting member is an end cap, which is connected to the housing;

[0022] The end cap is configured to abut against the liquid conduit to hold the liquid conduit in the compressed state, and to be driven by the drive member to open the opening to allow the liquid conduit to extend.

[0023] According to some embodiments of the present invention, the driving member is an elastic member, the housing is provided with a guide post extending along the extension direction of the liquid guiding pipe, and the elastic member passes through the guide post to guide the extension of the elastic member when the liquid guiding pipe switches from the compressed state to the unfolded state.

[0024] A vehicle according to a second aspect of the present invention includes a battery pack and a battery pack fire extinguishing structure as described in any of the above embodiments, wherein the battery pack has a liquid inlet and a gas outlet, and the liquid inlet is connected to the second end of the liquid guiding pipe.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic diagram of the battery pack fire extinguishing structure according to an embodiment of the present invention (the liquid guiding pipe is in a compressed state);

[0028] Figure 2 This is a schematic diagram of the battery pack fire extinguishing structure according to an embodiment of the present invention (the shell and end cap are hidden);

[0029] Figure 3 This is a cross-sectional schematic diagram of the battery pack fire extinguishing structure according to an embodiment of the present invention (the liquid guiding pipe is in a compressed state);

[0030] Figure 4This is a schematic diagram of the battery pack fire extinguishing structure according to an embodiment of the present invention (the liquid guiding pipe is in the deployed state);

[0031] Figure 5 This is a partially enlarged schematic diagram of the liquid guiding pipe in the unfolded state according to an embodiment of the present invention;

[0032] Figure 6 for Figure 3 Enlarged view of region A in the middle;

[0033] Figure 7 This is a schematic diagram of the liquid guiding pipe wound and housed in the accommodating cavity according to an embodiment of the present invention (viewed from the opposite direction of the first direction);

[0034] Figure 8 This is a schematic diagram of the liquid guiding pipe folded and housed in the receiving cavity according to an embodiment of the present invention (viewed from the opposite direction of the first direction);

[0035] Figure 9 This is a structural schematic diagram of the vehicle according to an embodiment of the present utility model.

[0036] Figure label:

[0037] Battery pack fire extinguishing structure 10; Battery pack 20; Vehicle controller 30; Pressure relief pipe 40; Safety valve 50; Extension pipe 60;

[0038] Housing 100; Fixing component 110; Guide post 120;

[0039] Liquid guiding pipe 200; first end 201; second end 202; variable diameter section 210; ring part 211; connecting part 212;

[0040] Ejection assembly 300; restraint component 310; drive component 320; destructive component 330;

[0041] End cap 400; Connector 410; Detailed Implementation

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0044] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0045] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0046] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] After a vehicle catches fire, the high-temperature source inside the power battery is protected by the battery compartment and battery casing. Firefighters often cannot directly spray fire extinguishing agents onto the power battery to cool it down, resulting in poor fire extinguishing effect and inability to stop the further spread of thermal runaway of the power battery in time.

[0048] In related technologies, the vehicle body is equipped with a valve that connects to the inside of the battery. In the event of thermal runaway, a fire extinguishing agent can be injected into the battery through this valve, thereby achieving precise and efficient fire suppression. However, in the event of thermal runaway, firefighters need to approach the vehicle body and connect the fire hoses to the valve, an operation that is quite difficult and carries a high safety risk.

[0049] To address the aforementioned problems, the first aspect of this application proposes a battery pack fire extinguishing structure 10, such as... Figures 1 to 4As shown, the battery pack fire extinguishing structure 10 includes a housing 100, a liquid guiding pipe 200, and an ejection assembly 300. The housing 100 defines a receiving cavity. The liquid guiding pipe 200 has a first end 201 and a second end 202. The first end 201 is used for the inflow of fire-fighting liquids such as fire water and fire extinguishing agents, and the second end 202 is used for the outflow of fire-fighting liquids. The second end 202 is fixed relative to the housing 100. The liquid guiding pipe 200 has a compressed state and an extended state. In the compressed state, the liquid guiding pipe 200 is located inside the receiving cavity. When the liquid guiding pipe 200 is in the extended state, the first end 201 extends out of the receiving cavity. For ease of subsequent description, the extension direction of the first end 201 is named the first direction.

[0050] It should be noted that the second end 202 of the liquid guiding pipe 200 is connected to the interior of the battery pack 20. More specifically, the battery pack fire extinguishing structure 10 can be installed adjacent to the battery pack 20, so that the second end 202 of the liquid guiding pipe 200 can be directly connected to the valve port on the battery pack 20, or, as... Figure 9 As shown, the battery pack 20 is located in the middle of the vehicle body, and the battery pack fire extinguishing structure 10 is located at the rear of the vehicle body. The battery pack 20 is also connected to an extension pipe 60, which connects the liquid guiding pipe 200 and the battery pack 20. The first end 201 of the liquid guiding pipe 200 is used to connect to fire-fighting facilities. For example, the first end 201 of the liquid guiding pipe 200 is used to connect to a fire hydrant so that the high-pressure water from the fire hydrant can enter the battery pack 20 to cool and extinguish the fire. Alternatively, after the fire truck arrives at the fire scene, the first end 201 of the liquid guiding pipe 200 is used to connect to the fire truck's fire-fighting pipeline to control the fire in a timely manner.

[0051] like Figure 2 and Figure 3 As shown, the ejection assembly 300 includes a limiting member 310 and a driving member 320. The limiting member 310 acts on the liquid guiding conduit to keep the liquid guiding conduit 200 in a compressed state. When the limiting member 310 is released, the driving member 320 drives the liquid guiding conduit 200 to switch from the compressed state to the deployed state, and causes the first end 201 of the liquid guiding conduit 200 to extend out of the receiving cavity.

[0052] More specifically, the driving member 320 acts on the first end 201 of the liquid guiding conduit 200 to provide a driving force to the liquid guiding conduit 200 in a first direction, so that the first end 201 of the liquid guiding conduit 200 moves and extends out of the receiving cavity. The limiting member 310 also acts on the first end 201 of the liquid guiding conduit 200 to provide a limiting force to the liquid guiding conduit 200 in the opposite direction to the first direction, so as to limit the movement of the liquid guiding conduit 200. When the liquid guiding conduit 200 is folded or rolled up in the receiving cavity in the compressed state, the limiting member 310 abuts against the liquid guiding conduit 200 to balance the driving force and the limiting force, and the displacement of the liquid guiding conduit 200 is limited. When the preset conditions are met (e.g., reaching the set temperature, receiving a fire alarm, etc.), the limiting member 310 separates from the liquid guiding pipe 200, and the restriction of the limiting member 310 on the liquid guiding pipe 200 is released. As a result, the driving member 320 can drive the first end 201 of the liquid guiding pipe 200 to pop out, and cause the first end 201 of the liquid guiding pipe 200 to drive the main body of the liquid guiding pipe 200 to gradually unfold and extend out of the receiving cavity, thereby switching the liquid guiding pipe 200 to the unfolded state.

[0053] When the battery pack fire extinguishing structure 10 of the first aspect of this application is applied to a vehicle, if the vehicle experiences a risk of thermal runaway, the ejection assembly 300 can drive the liquid guiding pipe 200 to eject outside the vehicle body. The length of the ejected liquid guiding pipe 200 can be designed according to specific scenarios, preferably 2m to 5m. After the liquid guiding pipe 200 is ejected, firefighters can connect the fire extinguishing pipeline and the liquid guiding pipe 200 without approaching the vehicle. This allows the fire extinguishing agent in the fire extinguishing pipeline to be injected into the interior of the battery pack 20 through the liquid guiding pipe 200, thereby achieving precise cooling and fire extinguishing, effectively curbing the spread of thermal runaway and preventing further fire spread.

[0054] Based on the above, the battery pack fire extinguishing structure 10 ensures a safe distance for fire fighting, avoids firefighters performing pipe connection operations in a high-temperature and dense smoke environment, reduces the difficulty of pipe connection, and has a high level of safety.

[0055] It should be noted that, in addition to being used for fire extinguishing of battery packs, the battery pack fire extinguishing structure 10 can also be used for fire extinguishing in enclosed spaces such as the passenger compartment, front trunk, or rear trunk, depending on the connection object of the second end 202 of the liquid guiding pipe 200.

[0056] In some embodiments, such as Figure 3 As shown, the fluid guide pipe 200 in the compressed state has a small volume, avoiding taking up too much space inside the vehicle body. When the vehicle experiences thermal runaway, the restraint of the limiting component 310 is released, and the fluid guide pipe 200 unfolds (as shown). Figure 4As shown, a certain distance is maintained between the first end 201, which is used to connect to the fire-fighting pipe, and the second end 202, which is connected to the inside of the battery pack 20, so as to facilitate the connection of the pipe by firefighters.

[0057] It should be noted that, in order to keep the volume of the fluid guiding pipe 200 small under compressed conditions, this application employs the following... Figure 3 and Figure 4 The structure shown is as follows. When the liquid guiding conduit 200 is in the deployed state, the liquid guiding conduit 200 includes at least one end of a variable diameter section 210. More specifically, a single variable diameter section 210 is formed by sequentially connecting multiple rings 211 with different inner diameters. Along the first direction, the inner diameter of the variable diameter section 210 gradually increases or gradually decreases, so that each ring 211 is arranged in a trend of gradually increasing inner diameter along the first direction, or each ring 211 is arranged in a trend of gradually decreasing inner diameter along the first direction, thereby forming a structure as shown. Figure 4 and Figure 5 The cone-shaped structure is shown. When the fluid guide pipe 200 is in a compressed state, as... Figure 3 As shown, along the direction from the inside to the outside of the liquid guiding pipe 200, the various rings 211 of the same variable diameter section 210 are nested in sequence according to the rule of increasing inner diameter. That is, among adjacent rings 211, the ring 211 with a smaller inner diameter is housed within the ring 211 with a larger inner diameter. This cycle continues, so that the liquid guiding pipe 200 forms a multi-layered ring structure nested from the inside to the outside in the compressed state.

[0058] In such Figure 4 In the embodiment shown, the liquid guiding pipe 200 is provided with five variable diameter sections 210. Taking the variable diameter section 210 closest to the first end 201 as an example, such as... Figure 5 and Figure 6 As shown, along the first direction, the outer diameter of the reducing section 210 gradually increases, so that the first end 201 of the liquid guiding pipe 200 has a larger opening for connecting to the fire-fighting pipe. More specifically, in... Figure 5 In the illustrated embodiment, the variable diameter section 210 includes a plurality of ring portions 211 and connecting portions 212 alternately arranged along a first direction, with adjacent ring portions 211 connected by connecting portions 212. Figure 6 As shown, when the fluid guiding pipe 200 is in a compressed state, the rings 211 of the same variable diameter section 210 are nested layer by layer, and the connecting part 212 is bent. When the restriction of the restrictor 310 is released, the driving member 320 drives the first end 201 of the fluid guiding pipe 200 to move along the first direction, so that the large end of the variable diameter section 210 is driven to move away from the nested structure, and drives the inner rings 211 to unfold layer by layer.

[0059] Understandably, in this structure, the unfolding direction of the fluid guiding pipe 200 is the same as its extension direction. Therefore, when the driving component 320 applies a driving force to the fluid guiding pipe 200 along the first direction, the fluid guiding pipe 200 can unfold smoothly without tangling or knotting, resulting in good unfolding stability. Furthermore, through this contraction method, the fluid guiding pipe 200 has a smaller volume in the compressed state, freeing up more space inside the vehicle body for accommodating other functional components.

[0060] Furthermore, such as Figure 4 As shown, the liquid guiding pipe 200 includes multiple variable diameter sections 210. Along the first direction, in two adjacent variable diameter sections 210, the inner diameter of one variable diameter section 210 gradually increases, and the inner diameter of the other variable diameter section 210 gradually decreases, as shown in the figure. Figure 4 Taking the example shown, in two adjacent variable diameter sections 210, if the inner diameter of the left variable diameter section 210 gradually increases along the first direction, and the inner diameter of the right variable diameter section 210 gradually decreases along the first direction, then the larger ends of these two adjacent variable diameter sections 210 are connected. If the inner diameter of the left variable diameter section 210 gradually decreases along the first direction, and the inner diameter of the right variable diameter section 210 gradually increases along the first direction, then the smaller ends of these two adjacent variable diameter sections 210 are connected. Multiple variable diameter sections 210 are connected sequentially according to the above rules, so that the larger ends are connected to the larger ends and the smaller ends are connected to the smaller ends, so that the change trend of the inner diameter of the liquid guiding pipe 200 is relatively gentle, avoiding sudden pressure increases or decreases when the water flows through different variable diameter sections 210 due to abrupt changes in the inner diameter, thereby ensuring that the water flow ejected from the liquid guiding pipe 200 can maintain a relatively stable flow rate and volume.

[0061] In addition, in such Figure 3 and Figure 4 In the illustrated embodiment, the variable diameter sections 210 are connected to form a liquid guiding pipe 200. Thus, when the variable diameter sections 210 are folded, the nested structure formed by the folding of the variable diameter sections 210 is stacked together along the first direction, thereby reducing the overall thickness (dimension along the first direction) of the liquid guiding pipe 200. It is understood that the material of the liquid guiding pipe 200 needs to have high temperature resistance and foldability.

[0062] In some other embodiments, the liquid guiding channel 200 is placed in the receiving cavity by winding. (See reference...) Figure 7As shown, the fluid guiding pipe 200 forms a wound structure under compression. The wound structure can be circular or square. It is understood that one of the first end 201 and the second end 202 is located at the innermost circle of the wound structure, and the other is located at the outermost circle. The winding can be initiated at the first end 201 and unwound at the second end 202, or vice versa. The winding axis is parallel to the first direction. When the limiting member 310 is released and the driving member 320 drives the first end 201 to pop out, the wound structure unfolds sequentially from the inside out or from the outside in.

[0063] Alternatively, other folding methods can be used to place the fluid guiding channel 200 within the receiving cavity. The fluid guiding channel 200 forms a stacked structure under compressed conditions. (Reference) Figure 8 As shown, the stacked structure includes multiple alternating bent segments and straight segments, with adjacent straight segments stacked together, thus forming a structure as shown in the diagram. Figure 8 The diagram shows a serpentine shape. One of the straight segments at each end forms the first end 201, and the other end forms 202. Along the direction from the first end 201 to the second end 202, the extension directions of adjacent straight segments are opposite. That is, assuming there is water flowing from the first end 201 to the second end 202 in the folded structure, the flow direction of the water is opposite in adjacent straight segments. In this folding method, the stacking direction of each straight segment can be parallel to the first direction, or the stacking direction of each straight segment can intersect with the first direction. It should be noted that... Figure 8 In the embodiment shown, the stacking direction of each straight line segment is set perpendicular to the first direction.

[0064] It is understood that in the above embodiments, the liquid guiding pipe 200 is housed in the accommodating cavity by forming a winding structure or a stacked structure under compressed conditions. In this embodiment, the pipe diameter of the liquid guiding pipe 200 can be kept consistent. On the one hand, the manufacturing or procurement cost of the liquid guiding pipe 200 is lower, and on the other hand, the water flow of the liquid guiding pipe 200 is more stable.

[0065] In some embodiments, the restraint 310 is a rope. For example... Figure 2 and Figure 3 As shown, when the liquid guiding pipe 200 is in a compressed state, a rope is wound around the liquid guiding pipe 200 and applies a force in the opposite direction to the liquid guiding pipe 200 in the first direction. The two ends of the rope are respectively connected to the housing 100 to keep the liquid guiding pipe 200 in a compressed state. At least one breaking element 330 is connected to the rope, which can break the rope, thereby releasing the restriction of the liquid guiding pipe 200. Under the drive of the driving element 320, the liquid guiding pipe 200 can be ejected outside the housing 100.

[0066] Choosing a rope as the restraint component 310 results in a simpler overall structure and lower manufacturing cost. Furthermore, it reduces the number of electronic control components in the battery pack fire extinguishing structure 10, thereby improving the activation stability of the battery pack fire extinguishing structure 10 under harsh working conditions.

[0067] In other embodiments, the limiting member 310 may also be a motor-controlled limiting protrusion (not shown in the figure), which can extend relative to the inner wall of the housing 100 to abut against the first end 201 of the fluid guiding pipe 200 in the compressed state. When a set condition is met, the limiting protrusion is retracted in a controlled manner to release the restriction on the fluid guiding pipe 200. The limiting member may also be a motor-controlled lever, which can rotate relative to the inner wall of the housing 100. Under normal circumstances, the lever rotates to the movement path of the fluid guiding pipe 200 and abuts against the first end 201 of the fluid guiding pipe 200, thereby limiting the ejection of the fluid guiding pipe 200. When the vehicle controller 30 receives thermal runaway information, it controls the motor to drive the lever to rotate toward the inner wall of the housing 100 to release the restriction on the fluid guiding pipe 200.

[0068] In such Figure 2 and Figure 3 In the illustrated embodiment, the rupture element 330 is a resistance wire wound around one end of a rope. The resistance wire can operate in a controlled manner and melts the rope at high temperature, thereby releasing the restraint of the restraint element 310 and allowing the liquid-conducting pipe 200 to pop out. Only one resistance wire can be used, or multiple resistance wires can be used, such as... Figure 3 As shown, a resistance wire is installed at each end of the rope. The redundancy design reduces the probability that the resistance wire will not work properly under harsh conditions, thus preventing the catapult assembly 300 from being activated.

[0069] In other embodiments (not shown in the figures), the breaking element 330 can also be a movable rod with a cutting head. Driven by a motor, the movable rod can move closer to or away from the rope. When the rope needs to be cut, the motor operates under control, driving the movable rod to move closer to the rope to cut it and eject the fluid guide pipe 200. Alternatively, both ends of the rope can be connected to the housing 100 using a specific structural adhesive. At a set temperature, the structural adhesive has good structural strength and adhesion to ensure a stable connection between the rope and the housing 100. When the vehicle body temperature reaches above the set temperature, the structural adhesive melts until the restrictive force of the structural adhesive on the rope is insufficient to resist the tensile force of the rope on the structural adhesive. At this point, the rope is driven by the driving element 320 to separate from the structural adhesive, and the fluid guide pipe 200 ejects.

[0070] Furthermore, such as Figure 3As shown, a fixing member 110 is provided on the housing 100 for connecting to a rope. A fixing member 110 is provided on each opposite side of the housing 100 to secure both ends of the rope. It should be noted that at least one fixing member 110 is located on the outside of the housing 100, so that one end of the rope passes through the housing 100 and connects to the fixing member 110 located on the outside of the housing 100. Figure 3 Taking the structure shown as an example, the lower fixing member 110 is located inside the housing 100 to improve the space utilization within the housing 100. The upper fixing member 110 is located outside the housing 100. Corresponding to the position of the fixing member 110, the housing 100 has a through hole for the rope to pass through. When installing the rope, first fix one end of the rope to the fixing member 110 inside the housing 100, then wrap the rope around the liquid guiding pipe 200, and then pass the other end of the rope through the housing 100 and connect it to the fixing member 110 on the outside of the housing 100. It can be understood that by adjusting the connection relationship between the rope and the outer fixing member 110, parameters such as the rope length and tension can be adjusted. Since the fixing member 110 is located on the outside of the housing 100, the operator can easily make adjustments. It can also be understood that both fixing members 110 can be located on the outer surface of the housing 100.

[0071] Furthermore, an emergency device (not shown in the figure) can be connected to the rope or fixing member 110. If the destructive device 330 malfunctions, the emergency device can be manually triggered to actuate the ejection assembly 300. For example, the emergency device can be a manual pull rope connected to the fixing member 110 located outside the housing 100, capable of destroying the fixing member 110 to release its restraining effect on the rope. Alternatively, the manual pull rope can also be connected to the rope, allowing it to break by pulling, or to separate from the first end 201 of the fluid conduit 200, thus enabling the fluid conduit 200 to eject.

[0072] Furthermore, the housing 100 has an opening communicating with the accommodating cavity, through which the liquid guiding pipe 200 can extend. To prevent dust from entering the accommodating cavity and affecting the operation of the battery pack fire extinguishing structure 10, such as... Figure 1 and Figure 3 As shown, the battery pack fire extinguishing structure 10 also includes an end cap 400. It is understood that the end cap 400 is connected to the housing 100 to close the opening. In the event of a fire, the end cap 400 opens the opening to avoid interfering with the ejection of the liquid guiding pipe 200. In some more specific embodiments, such as... Figure 3As shown, a connector 410 is provided on the inner side of the end cap 400. When the liquid guiding pipe 200 is in a compressed state, the two ends of the connector 410 are connected to the rope and the end cap 400 respectively. Since the rope is taut in the accommodating cavity, the rope can apply a tension force to the end cap 400 in the opposite direction of the first direction, so that the end cap 400 can be fastened to the opening of the housing 100, thereby maintaining the closed opening state of the end cap 400. When a fire occurs, the rope breaks under the action of the destructive member 330, thus failing to provide tension force to the end cap 400. The end cap 400 naturally detaches from the housing 100 or is pushed open by the liquid guiding pipe 200, thereby opening the opening of the end cap 400, and the liquid guiding pipe 200 extends under the action of the driving member 320.

[0073] In other embodiments (not shown in the figures), the end cap 400 may serve as a restraining member 310. For example, the end cap 400 may be hinged to a side wall of the housing 100 (referred to as the first side wall for ease of description) and may close to the aforementioned opening. An electrically controlled valve is provided on the side wall opposite the first side wall, which may open and extend its valve core when the end cap 400 is closed to restrict the opening of the end cap 400. The electrically controlled valve may also be controlled to retract its valve core so that the end cap 400 may rotate relative to the housing 100 to open the opening.

[0074] Therefore, under normal circumstances, the end cap 400 can close the opening and abut against the liquid guiding pipe 200 to restrict the extension of the liquid guiding pipe 200. After the set conditions are met, the valve core is retracted in a controlled manner, the restriction of the end cap 400 on the liquid guiding pipe 200 is released, and the drive member 320 can drive the liquid guiding pipe 200 to extend and push open the end cap 400, so that the end cap 400 opens the opening.

[0075] Alternatively, the end cap 400 can be bonded to the housing 100 with structural adhesive. When the temperature is below the set temperature, the end cap 400 restricts the movement of the liquid guiding pipe 200. When the temperature is above the set temperature, the liquid guiding pipe 200 pushes open the end cap 400 and extends out.

[0076] In some embodiments, such as Figure 3 As shown, the driving component 320 is an elastic component. A guide post 120 extending along the extension direction of the liquid guiding pipe 200 is provided on the housing 100. The elastic component passes through the guide post 120. When the liquid guiding pipe 200 is in a compressed state, the elastic component compresses and deforms, accumulating elastic potential energy. When the restriction of the limiting component 310 is released, the elastic component recovers its elastic deformation and releases its elastic potential energy, thereby driving the liquid guiding pipe 200 to switch from a compressed state to an extended state. The guide post 120 can guide the extension of the elastic component, thereby enabling the elastic component to stably push the liquid guiding pipe 200 out along the first direction.

[0077] The second aspect of this application provides a vehicle comprising a battery pack 20 and the fire extinguishing structure 10 mentioned in the above embodiments. It is understood that since the vehicle of this aspect includes the technical solutions of any of the above embodiments, it possesses the technical effects of the above embodiments, and will not be repeated here. Furthermore, the vehicle of this aspect can be a purely electric vehicle, or it can be a hybrid vehicle, a range-extended vehicle, etc. The vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck. The vehicle can also be a commercial vehicle, such as a van, bus, small truck, or large semi-trailer.

[0078] Furthermore, the battery pack 20 has a liquid inlet that connects to the second end 202 of the liquid guiding pipe 200 to allow fire-fighting liquid to flow into the battery pack 20. Additionally, the battery pack 20 also has a vent for escaping gas, thereby balancing the internal pressure of the battery pack 20. In some embodiments, the opening and closing of the vent is controlled by a safety valve 50, and the vent is connected to a pressure relief pipe 40 for discharging high-temperature gas from the battery pack 20 to the outside of the vehicle.

[0079] like Figure 9 In the illustrated embodiment, the battery pack fire suppression structure 10 is located at the rear of the vehicle. When the vehicle experiences thermal runaway, the sensors on the battery pack 20 send the abnormal situation to the vehicle controller 30 and the valve controller. The vehicle controller 30 then feeds back the abnormality to the vehicle manufacturer's cloud platform and the user's mobile app. After user confirmation, the cloud platform and the user issue a fire alarm and report the vehicle's location and surrounding environment, awaiting the arrival of firefighters.

[0080] Upon confirmation of thermal runaway, the vehicle controller 30 sends a signal to the valve controller, which opens the safety valve 50 to release pressure from the battery pack 20, allowing the extinguishing agent to enter the battery pack 20 smoothly. The pressure relief pipe 40 extends downwards to prevent flames from the battery pack 20 from shooting upwards and endangering the passenger compartment. Simultaneously, the vehicle controller 30 heats the resistance wire to burn through the rope, causing the elastic element to push the liquid-conducting pipe 200 out of the vehicle. After the liquid-conducting pipe 200 is deployed, if fire-fighting facilities are available on-site, they can be connected away from vehicles, ensuring the safety of firefighters. Alternatively, after firefighters arrive, the fire-fighting pipeline can be connected to the deployed liquid-conducting pipe 200. Water from the fire-fighting pipeline can then be accurately injected into the battery pack 20 through the liquid-conducting pipe 200 and the extension pipe 60, ensuring precise cooling of the battery pack 20 for fire extinguishing. This battery pack fire extinguishing structure 10 allows firefighters to extinguish the fire from a distance, ensuring a safe distance for firefighting and effectively curbing the spread of thermal runaway, preventing its further expansion. This not only significantly enhances user safety but also maximizes the protection of surrounding personnel and property.

[0081] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A battery pack fire extinguishing structure, characterized in that, include: A housing that defines a receiving cavity; A liquid guiding conduit has a first end for supplying fire-fighting liquid inflow and a second end for supplying fire-fighting liquid outflow. The liquid guiding conduit has a compressed state and an extended state. When the liquid guiding conduit is in the compressed state, it is located inside the receiving cavity. When the liquid guiding conduit is in the extended state, the first end extends out of the receiving cavity. The battery pack fire extinguishing structure further includes an ejection assembly, which includes a restraining member and a driving member. The restraining member is configured to act on the liquid guiding pipe to keep the liquid guiding pipe in the compressed state, and the driving member is configured to drive the liquid guiding pipe to switch from the compressed state to the deployed state when the restraining member is released.

2. The battery pack fire extinguishing structure according to claim 1, characterized in that, The drive is configured to drive the first end to move when the restrictor is released, so that the fluid guide tube switches from the compressed state to the deployed state.

3. The battery pack fire extinguishing structure according to claim 1, characterized in that, The fluid guiding pipe in the unfolded state includes at least one variable diameter section, which includes multiple rings of different sizes. Along the extension direction of the fluid guiding pipe, the rings are arranged in ascending order or descending order. When the fluid guiding pipe is in the compressed state, the rings of the same variable diameter section are nested together in ascending order along the inside-out direction.

4. The battery pack fire extinguishing structure according to claim 1, characterized in that, The fluid guiding pipe forms a wound structure under the compressed state, with one of the first end and the second end located at the innermost circle of the wound structure and the other located at the outermost circle of the wound structure. Alternatively, the fluid guiding pipe forms a stacked structure under the compressed state. The stacked structure includes a plurality of alternately arranged bent segments and straight segments, with each straight segment stacked on top of the others. One of the straight segments located at both ends forms the first end, and the other forms the second end.

5. The battery pack fire extinguishing structure according to claim 1, characterized in that, The limiting element is a rope, with both ends of the rope connected to the housing, and the rope is wound around the liquid guiding pipe to keep the liquid guiding pipe in the compressed state; The battery pack fire extinguishing structure also includes a breaker configured to disconnect the rope.

6. The battery pack fire extinguishing structure according to claim 5, characterized in that, The battery pack fire extinguishing structure also includes a fixing member, through which at least one end of the rope is connected to the outside of the housing.

7. The battery pack fire extinguishing structure according to claim 5, characterized in that, The housing also has an opening for the liquid guiding pipe to extend out, and the battery pack fire extinguishing structure also includes an end cap and a connector, the end cap being connected to the housing; When the fluid conduit is in the compressed state, the connector is connected to the rope and the end cap respectively, so that the end cap closes the opening. When the rope is broken by the breaking member, the end cap can open the opening.

8. The battery pack fire extinguishing structure according to claim 1, characterized in that, The housing also has an opening for the liquid guiding pipe to extend out, and the limiting member is an end cap, which is connected to the housing; The end cap is configured to abut against the liquid conduit to hold the liquid conduit in the compressed state, and to be driven by the drive member to open the opening to allow the liquid conduit to extend.

9. The battery pack fire extinguishing structure according to claim 1, characterized in that, The driving component is an elastic component, and the housing is provided with a guide post extending along the extension direction of the liquid guiding pipe. The elastic component passes through the guide post to guide the extension of the elastic component when the liquid guiding pipe switches from the compressed state to the extended state.

10. A vehicle, characterized in that, The device includes a battery pack and a battery pack fire extinguishing structure as described in any one of claims 1 to 9, wherein the battery pack has a liquid inlet and a gas outlet, and the liquid inlet is connected to the second end of the liquid guiding pipe.

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