A battery pack protection device against stress deformation induced fire and automobile

Abstract

The application relates to the technical field of new energy vehicles, and provides a battery pack protection device against force deformation-induced fire and a vehicle, which comprises a lower cover installed in a vehicle cabin, recesses are arranged on the bottom wall and the four side inner walls of the lower cover, first air bags are embedded in the recesses, the rear side surfaces of the first air bags are fixedly installed on the groove walls of the recesses, a plurality of first gas generators for inflating towards the corresponding first air bags are fixedly installed on the inner walls of the lower cover, the first air bags are inflated to expand for anti-collision protection, collision sensors are fixedly installed on the inner walls of the four corner parts of the lower cover, and the collision sensors are used for detecting the collision degree; a second air bag is fixedly installed on the upper surface of a bottom compression support plate, and the second air bag is inflated to expand for anti-collision protection. The application has the effects of double anti-collision protection and compression support from inside to outside, the structure is firm and stable, the application has the function of fire extinguishing, and the application is convenient to use.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and more specifically, to a battery pack protection device and a vehicle that resists fire caused by deformation under stress. Background Technology

[0002] With increasing environmental awareness and a shift in energy structure, electric vehicles are gradually becoming an important development direction for the future automotive market. The battery pack is the core component of an electric vehicle, typically composed of multiple individual batteries connected in series and parallel to form battery modules. These modules are then combined with components such as a thermal management system and a battery management system to form a complete battery pack. Battery pack design must consider factors such as vehicle space requirements, pure electric range requirements, and battery safety. Currently, battery pack technology development mainly focuses on increasing energy density, improving safety, and reducing costs. Simultaneously, with the development of intelligent and connected technologies, battery pack management systems also need continuous upgrading and improvement to meet the increasingly complex operational needs of electric vehicles. Since the battery is the power system of the entire vehicle, improving battery safety is essential. Currently, to prevent fires caused by collisions with the battery after a vehicle crash, corresponding protective devices are usually installed in the battery pack area to provide collision protection.

[0003] Utility model patent with authorization announcement number 202320760060.8 discloses a protective device and a vehicle, the protective device being applied to a battery pack. The protective device includes a carrier and an airbag. The carrier is connected to the battery pack. The airbag includes a first airbag and a second airbag, the second airbag being connected to the side of the first airbag. The airbag includes a depressurized state and an inflated state. In the depressurized state, both the first and second airbags are located between the carrier and the battery pack; in the inflated state, the first airbag is located between the carrier and the battery pack, and the second airbag is located on the side wall of the battery pack. In this way, the carrier, the first airbag, and the second airbag can absorb the impact force on the battery pack, thereby preventing the battery pack from being crushed, cracked, leaking electricity, short-circuited, or catching fire due to damage.

[0004] Patent application No. 202310691764.9 discloses a new energy vehicle battery with anti-collision function, relating to the field of automotive batteries. It includes a casing and multiple batteries, all located within the casing. It also includes a shock-absorbing and temperature-controlling device installed within the casing. Specifically, in this embodiment, the shock-absorbing and temperature-controlling device allows multiple batteries to be sequentially placed within multiple battery-encasing water bladders. During battery use, a heater or condenser is activated based on the battery's operating environment to control the temperature of the insulating oil within the multiple battery-encasing water bladders and the bottom water bladder, thereby effectively controlling the battery temperature. Simultaneously, the liquid shock absorption during battery use ensures sufficient cushioning, guaranteeing battery safety. Furthermore, the insulating oil can extinguish any fire that may occur in the battery during a collision, further ensuring the safety of the new energy vehicle.

[0005] While the aforementioned technical solutions have certain advantages, most battery pack protection devices rely solely on their external protective casing. When the casing deforms due to a collision, the inwardly deformed portion continues to compress the internal battery cells, causing damage. Furthermore, many battery packs use a single-layer inflatable airbag for impact protection; if this airbag ruptures, it becomes unusable, failing to provide adequate cushioning and causing inconvenience to users. Therefore, we propose a battery pack protection device and vehicle designed to combat fires caused by deformation under stress. Summary of the Invention

[0006] The purpose of this application is to provide a battery pack protection device and automobile that resists fire caused by deformation under stress, so as to solve the technical problems of existing technologies that use protective shells for protection and single-layer inflatable airbags for collision protection, which are difficult to achieve good buffer protection and cause inconvenience to users.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0008] On one hand, this application provides a battery pack protection device to resist fire caused by deformation under stress, including a lower cover installed in the vehicle compartment. The bottom wall and four inner walls of the lower cover are provided with grooves. A first airbag is embedded in the groove. The rear side of the first airbag is fixedly installed on the groove wall. Multiple first gas generators for inflating the corresponding first airbags are fixedly installed on the inner wall of the lower cover. The inflated first airbags are used for anti-collision protection. Collision sensors are fixedly installed on the inner walls of the four corners of the lower cover. The collision sensors are used to detect the degree of collision. A bottom pressure-resistant support plate is fixedly installed between the left and right inner walls of the lower cover. A second airbag is fixedly installed on the upper surface of the bottom pressure-resistant support plate. The inflated second airbag is used for anti-collision protection.

[0009] In one embodiment, the bottom pressure-resistant support plate is used to provide pressure-resistant support for the front and rear sides of the lower cover, so that the lower cover itself is not easily deformed after being impacted, and the thickness of the bottom pressure-resistant support plate is 0.5cm to 1.5cm.

[0010] In one embodiment, the second airbag is located at the center of a plurality of the first airbags for dual-layer collision protection operation.

[0011] In one embodiment, a central protective shell is fixedly installed on the upper surface of the bottom pressure-resistant support plate. Multiple sets of inner core batteries arranged in a matrix are fixedly installed on the bottom wall of the central protective shell. The central protective shell is used to protect the inner core batteries inside. The top of the central protective shell is connected to the outside. The second airbag is fitted on the outside of the central protective shell for anti-collision protection operation from the outside of the central protective shell.

[0012] In one embodiment, a second gas generator for inflating the second airbag is fixedly installed on the outer surface of the central protective shell. The second gas generator is fixedly connected to the central protective shell by fastening screws, which facilitates the fixed installation of the second gas generator.

[0013] In one embodiment, an upper cover is fixedly installed on the top surface of the lower cover, and a central wiring hole is provided at the center of the upper cover. The central wiring hole is located above the central protective shell and is used for wiring operations. The central wiring hole is sealed with waterproof adhesive to enable normal wiring operations at the central wiring hole.

[0014] In one embodiment, two sets of symmetrical longitudinal heat sinks are fixedly installed on the top plate of the upper cover, and two sets of symmetrical transverse heat sinks are also fixedly installed on the top plate of the upper cover. The longitudinal heat sinks and the transverse heat sinks are perpendicular to each other. The bottom ends of the longitudinal heat sinks and the transverse heat sinks pass through the upper cover and the distance between them and the top wall of the upper cover is 0.5 to 1 cm, which facilitates heat conduction using the longitudinal heat sinks and the transverse heat sinks, so that the internal heat can be discharged to the outside in a timely manner.

[0015] In one embodiment, two symmetrical fire extinguishing components are provided on the bottom surface of the upper cover. Each fire extinguishing component includes an outer hollow sleeve disposed on the top wall of the upper cover. The outer hollow sleeve has a hollow structure. A fire extinguishing airbag is fixedly installed on one inner wall of the outer hollow sleeve. The fire extinguishing component also includes two symmetrical third gas generators fixedly installed on the top wall of the upper cover. The third gas generators are used to inflate the fire extinguishing airbag. The fire extinguishing airbag is filled with dry powder extinguishing agent. Multiple horizontally arranged puncture needles are fixedly installed on the inner walls of both sides of the outer hollow sleeve. The puncture needles are used to puncture the inflated fire extinguishing airbag. After puncturing, the dry powder extinguishing agent is sprayed outward for fire extinguishing.

[0016] In one embodiment, end plates are fixedly installed on both the left and right sides of the outer hollow sleeve. The end plates are fixedly installed on the bottom surface of the upper cover by multiple fastening screws, which facilitates the fixing of the end plates and achieves the effect of fixing the outer hollow sleeve.

[0017] On the other hand, this application also provides a car including the above-mentioned battery pack protection device against fire caused by stress deformation, and a connecting component for mounting and connecting the battery pack protection device against fire caused by stress deformation.

[0018] The beneficial effects of the battery pack protection device against fires caused by deformation provided in this application, and the vehicle itself, are at least as follows:

[0019] 1. By setting a first gas generator and a first airbag, it is ensured that when the lower cover is hit during use, the first gas generator inside will activate to inflate the first airbag. The inflated first airbag can provide anti-collision protection. In addition, by setting a second airbag, as the second airbag inflates, it can provide a double anti-collision protection effect, which is convenient to use and achieves a double anti-collision protection effect.

[0020] 2. The bottom pressure-resistant support plate can provide pressure-resistant support to the lower cover from the inside out, achieving a stable pressure-resistant support effect. This prevents the lower cover from deforming after being impacted, thus protecting the internal battery cells from impact.

[0021] 3. Through the set fire extinguishing components, after the second airbag is activated, the third gas generator inflates the fire extinguishing airbag, causing it to expand. The expanded fire extinguishing airbag is then punctured by the puncture needle, causing the fire extinguishing agent inside the airbag to spray outward, achieving the effect of flame retardant fire extinguishing of the inner battery part. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of this application;

[0024] Figure 2 This is one of the exploded structural diagrams provided in the embodiments of this application;

[0025] Figure 3 This is the second schematic diagram of the exploded structure provided in the embodiments of this application;

[0026] Figure 4 This is a partial structural diagram of the lower cover provided in an embodiment of this application;

[0027] Figure 5 This is a partial structural schematic diagram of the second airbag provided in an embodiment of this application;

[0028] Figure 6 This is a partial structural schematic diagram of the fire extinguishing component provided in the embodiments of this application;

[0029] Figure 7 This is a partial structural schematic diagram of the upper cover provided in an embodiment of this application;

[0030] Figure 8 This is a system module block diagram provided for an embodiment of this application.

[0031] The following are the labeling elements in the figure:

[0032] 1. Lower cover; 10. Groove; 11. First airbag; 12. First gas generator; 13. Collision sensor; 14. Bottom pressure-resistant support plate;

[0033] 2. Second airbag; 20. Central protective shell; 21. Second gas generator; 22. Inner core battery;

[0034] 3. Top cover; 30. Center wiring hole; 31. Vertical heat sink; 32. Horizontal heat sink;

[0035] 4. Fire extinguishing assembly; 40. Outer hollow sleeve; 41. End plate; 42. Fire extinguishing airbag; 43. Third gas generator; 44. Puncture needle. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0037] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0038] Example 1

[0039] Please see Figures 1-8 As shown, this embodiment provides a battery pack protection device to resist fire caused by deformation under stress. It includes a lower cover 1 installed in the car compartment. The bottom wall and four inner walls of the lower cover 1 are provided with grooves 10. A first airbag 11 is embedded in the groove 10. The rear side of the first airbag 11 is fixedly installed on the groove wall of the groove 10 to limit one side of the first airbag 11 so that the first airbag 11 will not shake randomly in the groove 10.

[0040] Specifically, multiple first gas generators 12 are fixedly installed on the inner wall of the lower cover 1 for inflating the corresponding first airbags 11. After the first airbags 11 are inflated, they are used for anti-collision protection. Collision sensors 13 are fixedly installed on the inner walls of the four corners of the lower cover 1. The collision sensors 13 are used to detect the degree of collision. A bottom anti-compression support plate 14 is fixedly installed between the inner walls of the left and right sides of the lower cover 1. A second airbag 2 is fixedly installed on the upper surface of the bottom anti-compression support plate 14. The second airbag 2 is inflated for anti-collision protection. The first airbag 11 and the second airbag 2 can achieve a dual protection effect and are convenient to use.

[0041] In this embodiment, the second airbag 2 is located at the center of the plurality of first airbags 11, and is used for double-layer anti-collision protection.

[0042] Specifically, the bottom pressure-resistant support plate 14 is used to provide pressure-resistant support for the front and rear sides of the lower cover 1, so that the lower cover 1 is not easily deformed after being hit, and to provide stable support for the lower cover 1 from the inside out; the thickness of the bottom pressure-resistant support plate 14 is 0.5cm to 1.5cm, and it is used for stable pressure-resistant support.

[0043] Example 2

[0044] Please see Figures 1-8 As shown, this embodiment provides a battery pack protection device to resist fire caused by deformation under stress. It includes a lower cover 1 installed in the car compartment. The bottom wall and four inner walls of the lower cover 1 are provided with grooves 10. A first airbag 11 is embedded in the groove 10. The rear side of the first airbag 11 is fixedly installed on the groove wall of the groove 10 to limit one side of the first airbag 11 so that the first airbag 11 will not shake randomly in the groove 10.

[0045] Specifically, multiple first gas generators 12 are fixedly installed on the inner wall of the lower cover 1 for inflating the corresponding first airbags 11. After the first airbags 11 are inflated, they are used for anti-collision protection. Collision sensors 13 are fixedly installed on the inner walls of the four corners of the lower cover 1. The collision sensors 13 are used to detect the degree of collision. A bottom anti-compression support plate 14 is fixedly installed between the inner walls of the left and right sides of the lower cover 1. A second airbag 2 is fixedly installed on the upper surface of the bottom anti-compression support plate 14. The second airbag 2 is inflated for anti-collision protection. The first airbag 11 and the second airbag 2 can achieve a dual protection effect and are convenient to use.

[0046] In this embodiment, the second airbag 2 is located at the center of the plurality of first airbags 11, and is used for double-layer anti-collision protection.

[0047] Specifically, the bottom pressure-resistant support plate 14 is used to provide pressure-resistant support for the front and rear sides of the lower cover 1, so that the lower cover 1 is not easily deformed after being hit, and to provide stable support for the lower cover 1 from the inside out; the thickness of the bottom pressure-resistant support plate 14 is 0.5cm to 1.5cm, and it is used for stable pressure-resistant support.

[0048] Furthermore, a central protective shell 20 is fixedly installed on the upper surface of the bottom pressure-resistant support plate 14. Multiple sets of inner core batteries 22 arranged in a matrix are fixedly installed on the bottom wall of the central protective shell 20. The central protective shell 20 is used to protect the inner core batteries 22 inside. The top of the central protective shell 20 is connected to the outside. The second airbag 2 is fitted on the outside of the central protective shell 20 for anti-collision protection operation from the outside of the central protective shell 20.

[0049] In addition, a second gas generator 21 for inflating the second airbag 2 is fixedly installed on the outer side of the central protective shell 20. The second gas generator 21 is fixedly connected to the central protective shell 20 by fastening screws, which facilitates the fixed installation of the second gas generator 21.

[0050] Example 3

[0051] Please see Figures 1-8 As shown, this embodiment provides a battery pack protection device to resist fire caused by deformation under stress. It includes a lower cover 1 installed in the car compartment. The bottom wall and four inner walls of the lower cover 1 are provided with grooves 10. A first airbag 11 is embedded in the groove 10. The rear side of the first airbag 11 is fixedly installed on the groove wall of the groove 10 to limit one side of the first airbag 11 so that the first airbag 11 will not shake randomly in the groove 10.

[0052] Specifically, multiple first gas generators 12 are fixedly installed on the inner wall of the lower cover 1 for inflating the corresponding first airbags 11. After the first airbags 11 are inflated, they are used for anti-collision protection. Collision sensors 13 are fixedly installed on the inner walls of the four corners of the lower cover 1. The collision sensors 13 are used to detect the degree of collision. A bottom anti-compression support plate 14 is fixedly installed between the inner walls of the left and right sides of the lower cover 1. A second airbag 2 is fixedly installed on the upper surface of the bottom anti-compression support plate 14. The second airbag 2 is inflated for anti-collision protection. The first airbag 11 and the second airbag 2 can achieve a dual protection effect and are convenient to use.

[0053] In this embodiment, the second airbag 2 is located at the center of the plurality of first airbags 11, and is used for double-layer anti-collision protection.

[0054] Specifically, the bottom pressure-resistant support plate 14 is used to provide pressure-resistant support for the front and rear sides of the lower cover 1, so that the lower cover 1 is not easily deformed after being hit, and to provide stable support for the lower cover 1 from the inside out; the thickness of the bottom pressure-resistant support plate 14 is 0.5cm to 1.5cm, and it is used for stable pressure-resistant support.

[0055] Furthermore, a central protective shell 20 is fixedly installed on the upper surface of the bottom pressure-resistant support plate 14. Multiple sets of inner core batteries 22 arranged in a matrix are fixedly installed on the bottom wall of the central protective shell 20. The central protective shell 20 is used to protect the inner core batteries 22 inside. The top of the central protective shell 20 is connected to the outside. The second airbag 2 is fitted on the outside of the central protective shell 20 for anti-collision protection operation from the outside of the central protective shell 20.

[0056] In addition, a second gas generator 21 for inflating the second airbag 2 is fixedly installed on the outer side of the central protective shell 20. The second gas generator 21 is fixedly connected to the central protective shell 20 by fastening screws, which facilitates the fixed installation of the second gas generator 21.

[0057] It is worth noting that the top cover 3 is fixedly installed on the top surface of the bottom cover 1. After the top cover 3 is closed, the inner battery 22 is protected inside.

[0058] It is worth noting that a central wiring hole 30 is provided at the center of the top cover 3. The central wiring hole 30 is located above the central protective shell 20. The central wiring hole 30 is used for wiring operations. After the wire is threaded and connected at the central wiring hole 30, the cable is sealed to the hole wall of the central wiring hole 30 with waterproof glue, so that wiring operations can be carried out normally at the central wiring hole 30. At the same time, the waterproof glue can achieve a waterproof sealing effect.

[0059] Example 4

[0060] Please see Figures 1-8 As shown, this embodiment provides a battery pack protection device to resist fire caused by deformation under stress. It includes a lower cover 1 installed in the car compartment. The bottom wall and four inner walls of the lower cover 1 are provided with grooves 10. A first airbag 11 is embedded in the groove 10. The rear side of the first airbag 11 is fixedly installed on the groove wall of the groove 10 to limit one side of the first airbag 11 so that the first airbag 11 will not shake randomly in the groove 10.

[0061] Specifically, multiple first gas generators 12 are fixedly installed on the inner wall of the lower cover 1 for inflating the corresponding first airbags 11. After the first airbags 11 are inflated, they are used for anti-collision protection. Collision sensors 13 are fixedly installed on the inner walls of the four corners of the lower cover 1. The collision sensors 13 are used to detect the degree of collision. A bottom anti-compression support plate 14 is fixedly installed between the inner walls of the left and right sides of the lower cover 1. A second airbag 2 is fixedly installed on the upper surface of the bottom anti-compression support plate 14. The second airbag 2 is inflated for anti-collision protection. The first airbag 11 and the second airbag 2 can achieve a dual protection effect and are convenient to use.

[0062] In this embodiment, the second airbag 2 is located at the center of the plurality of first airbags 11, and is used for double-layer anti-collision protection.

[0063] Specifically, the bottom pressure-resistant support plate 14 is used to provide pressure-resistant support for the front and rear sides of the lower cover 1, so that the lower cover 1 is not easily deformed after being hit, and to provide stable support for the lower cover 1 from the inside out; the thickness of the bottom pressure-resistant support plate 14 is 0.5cm to 1.5cm, and it is used for stable pressure-resistant support.

[0064] Furthermore, a central protective shell 20 is fixedly installed on the upper surface of the bottom pressure-resistant support plate 14. Multiple sets of inner core batteries 22 arranged in a matrix are fixedly installed on the bottom wall of the central protective shell 20. The central protective shell 20 is used to protect the inner core batteries 22 inside. The top of the central protective shell 20 is connected to the outside. The second airbag 2 is fitted on the outside of the central protective shell 20 for anti-collision protection operation from the outside of the central protective shell 20.

[0065] In addition, a second gas generator 21 for inflating the second airbag 2 is fixedly installed on the outer side of the central protective shell 20. The second gas generator 21 is fixedly connected to the central protective shell 20 by fastening screws, which facilitates the fixed installation of the second gas generator 21.

[0066] It is worth noting that the top cover 3 is fixedly installed on the top surface of the bottom cover 1. After the top cover 3 is closed, the inner battery 22 is protected inside.

[0067] It is worth noting that a central wiring hole 30 is provided at the center of the top cover 3. The central wiring hole 30 is located above the central protective shell 20. The central wiring hole 30 is used for wiring operations. After the wire is threaded and connected at the central wiring hole 30, the cable is sealed to the hole wall of the central wiring hole 30 with waterproof glue, so that wiring operations can be carried out normally at the central wiring hole 30. At the same time, the waterproof glue can achieve a waterproof sealing effect.

[0068] In this embodiment, two sets of symmetrical longitudinal heat sinks 31 are fixedly installed on the top plate of the upper cover 3. Two sets of symmetrical transverse heat sinks 32 are also fixedly installed on the top plate of the upper cover 3. The longitudinal heat sinks 31 and the transverse heat sinks 32 are perpendicular to each other. The bottom ends of the longitudinal heat sinks 31 and the transverse heat sinks 32 pass through the upper cover 3 and the distance between them and the top wall of the upper cover 3 is 0.5 to 1 cm, which facilitates the heat conduction operation using the longitudinal heat sinks 31 and the transverse heat sinks 32, so that the internal heat can be discharged to the outside in a timely manner.

[0069] Specifically, there are 20 to 30 vertical heat sinks 31 and 15 to 25 horizontal heat sinks 32. The distance between two adjacent vertical heat sinks 31 is between 0.3 cm and 0.5 cm, and the distance between two adjacent horizontal heat sinks 32 is between 0.4 cm and 0.8 cm, in order to improve the heat dissipation effect. The vertical heat sinks 31 and the horizontal heat sinks 32 can be made of copper or aluminum alloy materials, which have good thermal conductivity.

[0070] Example 5

[0071] Please see Figures 1-8As shown, this embodiment provides a battery pack protection device to resist fire caused by deformation under stress. It includes a lower cover 1 installed in the car compartment. The bottom wall and four inner walls of the lower cover 1 are provided with grooves 10. A first airbag 11 is embedded in the groove 10. The rear side of the first airbag 11 is fixedly installed on the groove wall of the groove 10 to limit one side of the first airbag 11 so that the first airbag 11 will not shake randomly in the groove 10.

[0072] Specifically, multiple first gas generators 12 are fixedly installed on the inner wall of the lower cover 1 for inflating the corresponding first airbags 11. After the first airbags 11 are inflated, they are used for anti-collision protection. Collision sensors 13 are fixedly installed on the inner walls of the four corners of the lower cover 1. The collision sensors 13 are used to detect the degree of collision. A bottom anti-compression support plate 14 is fixedly installed between the inner walls of the left and right sides of the lower cover 1. A second airbag 2 is fixedly installed on the upper surface of the bottom anti-compression support plate 14. The second airbag 2 is inflated for anti-collision protection. The first airbag 11 and the second airbag 2 can achieve a dual protection effect and are convenient to use.

[0073] In this embodiment, the second airbag 2 is located at the center of the plurality of first airbags 11, and is used for double-layer anti-collision protection.

[0074] Specifically, the bottom pressure-resistant support plate 14 is used to provide pressure-resistant support for the front and rear sides of the lower cover 1, so that the lower cover 1 is not easily deformed after being hit, and to provide stable support for the lower cover 1 from the inside out; the thickness of the bottom pressure-resistant support plate 14 is 0.5cm to 1.5cm, and it is used for stable pressure-resistant support.

[0075] Furthermore, a central protective shell 20 is fixedly installed on the upper surface of the bottom pressure-resistant support plate 14. Multiple sets of inner core batteries 22 arranged in a matrix are fixedly installed on the bottom wall of the central protective shell 20. The central protective shell 20 is used to protect the inner core batteries 22 inside. The top of the central protective shell 20 is connected to the outside. The second airbag 2 is fitted on the outside of the central protective shell 20 for anti-collision protection operation from the outside of the central protective shell 20.

[0076] In addition, a second gas generator 21 for inflating the second airbag 2 is fixedly installed on the outer side of the central protective shell 20. The second gas generator 21 is fixedly connected to the central protective shell 20 by fastening screws, which facilitates the fixed installation of the second gas generator 21.

[0077] It is worth noting that the top cover 3 is fixedly installed on the top surface of the bottom cover 1. After the top cover 3 is closed, the inner battery 22 is protected inside.

[0078] It is worth noting that a central wiring hole 30 is provided at the center of the top cover 3. The central wiring hole 30 is located above the central protective shell 20. The central wiring hole 30 is used for wiring operations. After the wire is threaded and connected at the central wiring hole 30, the cable is sealed to the hole wall of the central wiring hole 30 with waterproof glue, so that wiring operations can be carried out normally at the central wiring hole 30. At the same time, the waterproof glue can achieve a waterproof sealing effect.

[0079] In this embodiment, two sets of symmetrical longitudinal heat sinks 31 are fixedly installed on the top plate of the upper cover 3. Two sets of symmetrical transverse heat sinks 32 are also fixedly installed on the top plate of the upper cover 3. The longitudinal heat sinks 31 and the transverse heat sinks 32 are perpendicular to each other. The bottom ends of the longitudinal heat sinks 31 and the transverse heat sinks 32 pass through the upper cover 3 and the distance between them and the top wall of the upper cover 3 is 0.5 to 1 cm, which facilitates the heat conduction operation using the longitudinal heat sinks 31 and the transverse heat sinks 32, so that the internal heat can be discharged to the outside in a timely manner.

[0080] Specifically, there are 20 to 30 vertical heat sinks 31 and 15 to 25 horizontal heat sinks 32. The distance between two adjacent vertical heat sinks 31 is between 0.3 cm and 0.5 cm, and the distance between two adjacent horizontal heat sinks 32 is between 0.4 cm and 0.8 cm, in order to improve the heat dissipation effect. The vertical heat sinks 31 and the horizontal heat sinks 32 can be made of copper or aluminum alloy materials, which have good thermal conductivity.

[0081] Furthermore, two symmetrical fire extinguishing components 4 are provided on the bottom surface of the upper cover 3. The fire extinguishing components 4 include an outer hollow sleeve 40 set on the top wall of the upper cover 3. The outer hollow sleeve 40 is a hollow structure. A fire extinguishing airbag 42 is fixedly installed on one inner wall of the outer hollow sleeve 40. The fire extinguishing components 4 also include two symmetrical third gas generators 43 fixedly installed on the top wall of the upper cover 3. The third gas generators 43 are used to inflate the fire extinguishing airbag 42. The fire extinguishing airbag 42 is filled with dry powder extinguishing agent. Multiple horizontally arranged puncture needles 44 are fixedly installed on the inner walls of both sides of the outer hollow sleeve 40. The puncture needles 44 are used to puncture the inflated fire extinguishing airbag 42. After puncturing, the dry powder extinguishing agent is sprayed outward for fire extinguishing. The dry powder extinguishing agent is sprayed towards the inner core battery 22, which can extinguish the fire at the inner core battery 22, making it convenient to use and achieving the effect of safe use.

[0082] It is worth noting that end plates 41 are fixedly installed on both the left and right sides of the outer hollow sleeve 40. The end plates 41 are fixedly installed on the bottom surface of the upper cover 3 by multiple fastening screws, which facilitates the fixing of the end plates 41 and achieves the effect of fixing the outer hollow sleeve 40.

[0083] It is worth noting that, such as Figure 8 As shown, the collision sensor 13 is connected to the central control processor on the vehicle's center console. The central control processor is also electrically connected to the first gas generator 12, the second gas generator 21, and the third gas generator 43. The central control processor sets collision intensity levels, categorized from low to high as low, medium, and high. If a collision occurs during vehicle operation, the collision sensor 13 transmits the detected collision data to the central control processor. The central control processor analyzes the data and determines the collision level. If the collision level is low, the central control processor takes no action; if the collision level is medium, the central control processor controls the first gas generator... When device 12 is activated, the first gas generator 12 inflates the first airbag 11 to achieve primary anti-collision protection. If the collision level is high, the central control processor controls the first gas generator 12, the second gas generator 21, and the third gas generator 43 to operate simultaneously. The first gas generator 12 and the second gas generator 21 inflate the corresponding first airbag 11 and second airbag 2 to provide anti-collision protection. In addition, the third gas generator 43 inflates the fire extinguishing airbag 42. After the fire extinguishing airbag 42 inflates to a certain extent, it is punctured by the puncture needle 44, and the dry powder extinguishing agent inside the fire extinguishing airbag 42 is sprayed outward to the inner core battery 22 to perform fire extinguishing.

[0084] It should be noted that the central control processor, the first gas generator 12, the second gas generator 21, the third gas generator 43, and the collision sensor 13 of this invention are all general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the adapted controller and power supply, are connected by wires. The specific connection methods should refer to the working principle of this invention. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0085] This embodiment also provides a vehicle, including the aforementioned battery pack protection device for resisting fire caused by deformation under stress, and a connecting component for mounting and connecting the battery pack protection device for resisting fire caused by deformation under stress.

[0086] The battery pack protection device of this application, which is designed to prevent fires caused by deformation under stress, is used in conjunction with a vehicle. If the vehicle is involved in a collision, the collision sensor 13 detects the degree of collision and sends the data to the central control processor. If the collision reaches a certain level, the first gas generator 12 activates, inflating the first airbag 11 for impact protection. If the collision is more severe, the second gas generator 21 also activates simultaneously, inflating the second airbag 2 to provide impact protection from the outside of the central protective shell 20. After the second airbag 2 is activated, the third gas generator 43 activates simultaneously, inflating the fire extinguishing airbag 42. The inflated fire extinguishing airbag 42 is then punctured by the puncture needle 44, and the dry powder extinguishing agent inside is ejected to extinguish the fire at the inner battery 22.

[0087] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery pack protection device for resisting fire caused by deformation under stress, characterized in that, The system includes a lower cover (1) installed in the car compartment. The bottom wall and the four inner walls of the lower cover (1) are provided with grooves (10). A first airbag (11) is embedded in the groove (10). The rear side of the first airbag (11) is fixedly installed on the groove wall of the groove (10). Multiple first gas generators (12) for inflating the corresponding first airbag (11) are fixedly installed on the inner wall of the lower cover (1). The first airbag (11) is used for anti-collision protection after being inflated. Collision sensors (13) are fixedly installed on the inner walls of the four corners of the lower cover (1). The collision sensors (13) are used to detect the degree of collision. A bottom pressure-resistant support plate (14) is fixedly installed between the inner walls of the left and right sides of the lower cover (1). A second airbag (2) is fixedly installed on the upper surface of the bottom pressure-resistant support plate (14). The second airbag (2) inflates for anti-collision protection. The second airbag (2) is located at the center of multiple first airbags (11) for double-layer anti-collision protection. A central protective shell (20) is fixedly installed on the upper surface of the bottom pressure-resistant support plate (14). Multiple sets of inner core batteries (22) are fixedly installed on the bottom wall of the central protective shell (20). The second airbag (2) is sleeved on the outside of the central protective shell (20) for anti-collision protection from the outside. An upper cover (3) is fixedly installed on the top surface of the lower cover (1). Two symmetrical fire extinguishing components (4) are provided on the bottom surface of the upper cover (3). The fire extinguishing components (4) include an outer hollow sleeve (40) provided on the top wall of the upper cover (3). The outer hollow sleeve (40) is a hollow structure. A fire extinguishing airbag (42) is fixedly installed on one inner wall of the outer hollow sleeve (40). The fire extinguishing components (4) also include two symmetrical fire extinguishing components fixedly installed on the upper cover (1). 3) A third gas generator (43) on the top wall is used to inflate the fire extinguishing airbag (42). The fire extinguishing airbag (42) is filled with dry powder extinguishing agent. Multiple horizontally arranged puncture needles (44) are fixedly installed on the inner walls of the left and right sides of the outer hollow sleeve (40). The puncture needles (44) are used to puncture the inflated fire extinguishing airbag (42). After puncturing, the dry powder extinguishing agent is sprayed out for fire extinguishing.

2. The battery pack protection device for resisting fire caused by deformation under stress according to claim 1, characterized in that, The bottom pressure-resistant support plate (14) is used to provide pressure-resistant support for the front and rear sides of the lower cover (1). The thickness of the bottom pressure-resistant support plate (14) is 0.5cm to 1.5cm.

3. The battery pack protection device for resisting fire caused by deformation under stress according to claim 1, characterized in that, The multiple sets of inner core batteries (22) are arranged in a matrix, and the central protective shell (20) is used to protect the inner core batteries (22) inside. The top of the central protective shell (20) is connected to the outside.

4. The battery pack protection device for resisting fire caused by deformation under stress according to claim 3, characterized in that, A second gas generator (21) for inflating the second airbag (2) is fixedly installed on the outer side of the central protective shell (20). The second gas generator (21) is fixedly connected to the central protective shell (20) by fastening screws.

5. The battery pack protection device for resisting fire caused by deformation under stress according to claim 3, characterized in that, A central wiring hole (30) is provided at the center of the upper cover (3). The central wiring hole (30) is located above the central protective shell (20). The central wiring hole (30) is used for wiring operations. The central wiring hole (30) is sealed with waterproof glue.

6. The battery pack protection device for resisting fire caused by deformation under stress according to claim 5, characterized in that, The top plate of the upper cover (3) is fixedly installed with two sets of symmetrical longitudinal heat sinks (31) on the left and right sides. The top plate of the upper cover (3) is also fixedly installed with two sets of symmetrical transverse heat sinks (32) in front and behind. The longitudinal heat sinks (31) and the transverse heat sinks (32) are perpendicular to each other. The bottom ends of the longitudinal heat sinks (31) and the transverse heat sinks (32) pass through the upper cover (3) and the distance between them and the top wall of the upper cover (3) is 0.5 to 1 cm.

7. The battery pack protection device for resisting fire caused by deformation under stress according to claim 1, characterized in that, End plates (41) are fixedly installed on both the left and right sides of the outer hollow sleeve (40), and the end plates (41) are fixedly installed on the bottom surface of the upper cover (3) by multiple fastening screws.

8. A car, characterized in that: It includes the battery pack protection device for resisting fire caused by stress deformation as described in any one of claims 1-7, and a connecting component for mounting and connecting the battery pack protection device for resisting fire caused by stress deformation.

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