Fire extinguishing structure for battery pack

Abstract

The utility model discloses a fire extinguishing structure for a battery pack, and particularly relates to the technical field of fire extinguishing of the battery pack, which is characterized in that fire detection pipe branch pipes in contact with the end surface of a battery cell module are arranged on two sides of a flame-retardant heat-insulating sheet, or the fire detection pipe branch pipes are arranged right above the flame-retardant heat-insulating sheet; the fire detection pipe branch pipe is used for fire fighting of the battery cell modules in the bearing assemblies on the two sides, the fire detection pipe branch pipe extends into the end of each battery cell module, so that point-to-point spraying cooling, fire fighting and fire extinguishing can be achieved when thermal runaway occurs to each battery cell module, and incomplete coverage is avoided; the high-pressure fire-fighting agent in the main fire detection pipe is filled into the corresponding branch fire detection pipe along the branch fire detection pipe device, and when local high temperature reaches the working temperature of the branch fire detection pipe or the main fire detection pipe, the corresponding position is broken, and the high-pressure fire-fighting agent is sprayed to a high-temperature area, so that the purposes of cooling, oxygen isolation and fire extinguishment are achieved, and the fire extinguishment response speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack fire protection, in particular to a battery pack fire extinguishing structure. Background Art

[0002] As a new type of energy storage power source, lithium-ion battery packs are subject to production defects and slow chemical reactions during use. The fire hazard of lithium-ion battery packs cannot be completely eliminated. With the rapid development of electric vehicles and energy storage technologies, battery pack fire extinguishing technology is also constantly improving. The existing solutions cannot achieve full coverage and no blind spots for a single cell inside the battery pack. There are detection blind spots, the fire extinguishing response speed is not timely, and the fire extinguishing efficiency is affected, which leads to the spread of fire. Utility Model Content

[0003] The purpose of the present invention is to provide a fire extinguishing structure for a battery pack to solve the problem mentioned in the background art that the battery cells may not be covered and have blind spots, resulting in slow fire extinguishing response speed.

[0004] The utility model can be realized by the following technical solutions:

[0005] A battery pack fire extinguishing structure includes a U-shaped vertical frame, a reinforcement base plate is installed on the bottom surface of the inner cavity of the vertical frame, and a power battery assembly is arranged above the reinforcement base plate. The power battery assembly includes multiple groups of bearing assemblies;

[0006] Each group of load-bearing components is provided with a number of battery core modules, and a flame-retardant heat-insulating sheet is vertically installed between the mating ends of two adjacent groups of load-bearing components. A fire-fighting assembly is installed inside the vertical frame; the fire-fighting assembly includes a fire detection pipe main, and a plurality of fire detection pipe distributors are installed on the surface of the fire detection pipe main, and each fire detection pipe distributor is provided with two or a single fire detection pipe branch on the surface;

[0007] When there are two fire detection tube branches, the fire detection tube branches on both sides are arranged in a winding manner and contact the outer surfaces of the ends of the multiple battery modules in each group of load-bearing components; when there is a single fire detection tube branch, the fire detection tube branch is located directly above the flame retardant thermal insulation plate.

[0008] A further technical improvement of the present invention is that baffles are fitted on both side ends of the reinforced base plate, multiple groups of load-bearing components are installed between the two baffles, each group of load-bearing components includes two limiting frames, and several arc-shaped portions are provided inside the limiting frames, and the interior of each arc-shaped portion is adapted to be installed with the outer surface of the battery cell module.

[0009] A further technical improvement of the present invention is that straight portions are provided inside the limiting frame and above and below the adjacent arc-shaped portion, and the straight portions form a gap in the battery module, and this gap is used for the passage of the fire detection tube branch arranged in a winding manner.

[0010] A further technical improvement of the present invention is that a single connecting fixing piece is installed at the top end of two adjacent limiting frames, and two connecting fixing pieces are provided. The upper surface of the limiting frame is provided with a limiting portion for fixing a single fire detection tube branch.

[0011] A further technical improvement of the present invention is that a connecting plug is installed on one side surface of the vertical frame, the connecting plug is connected to the main pipe of the fire detection pipe, and a one-way valve is provided on the connecting plug, and a pressure sensor is installed on the inner wall surface of the vertical frame at the end of the main pipe of the fire detection pipe.

[0012] A further technical improvement of the present invention is that a plug is provided at the end of the fire detection tube branch.

[0013] A further technical improvement of the present invention is that an upper cover is adapted to be installed on the top surface of the vertical frame, and flame retardant and heat-insulating materials are provided on the upper cover and the interior thereof.

[0014] A further technical improvement of the present invention is that when the battery module is vertical, the main pipe of the fire detection tube is bent and located in the middle of two adjacent battery modules.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] According to the layout requirements, two or a single fire detection pipe branch is selected to be installed on the fire detection pipe distributor, and fire detection pipe branches in contact with the end faces of the battery module are installed on both sides of the flame retardant thermal insulation sheet. The fire detection pipe branches on both sides are looped back and in contact with the outer surfaces of the ends of multiple battery modules in the corresponding load-bearing components; a single fire detection pipe branch is selected to be installed on the fire detection pipe distributor, and is set just above the flame retardant thermal insulation sheet, and is fixed by the fitting end of the load-bearing component, and is used for fire fighting of the battery modules in the load-bearing components on both sides. When the battery module has thermal runaway, the fire detection pipe branch ruptures and sprays to the corresponding position to achieve A single tube covers both sides; since it extends into the end of each battery module, it ensures that each battery module can achieve point-to-point spray cooling, fire fighting, and fire extinguishing when thermal runaway occurs, avoiding incomplete coverage. Since the fire detection pipe branch is connected to the fire detection pipe distributor and the fire detection pipe main, the high-pressure fire fighting agent in the fire detection pipe main is filled into the corresponding fire detection pipe branch along the fire detection pipe distributor. When high temperature is encountered locally and the high temperature reaches the working temperature of the fire detection pipe branch or the fire detection pipe main, the corresponding position ruptures, and the high-pressure fire fighting agent is sprayed into the high-temperature area to achieve the purpose of cooling, oxygen isolation, and fire extinguishing, thereby improving the fire extinguishing response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the external structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 A partial enlarged view of point A in the middle;

[0020] Figure 3 This is a schematic diagram of the three-dimensional installation structure of the fire detection tube branch of the utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional installation structure of the fire detection pipe distributor in another embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the installation structure of the utility model from a top view;

[0023] Figure 6 This is a schematic diagram of the planar structure of a fire detection tube branch in another embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of another arrangement structure of the battery cell module of the present invention.

[0025] In the figure: 1. Vertical frame; 2. Reinforced bottom plate; 3. Baffle; 4. Fire detection pipe main pipe; 5. Pressure sensor; 6. Limiting frame; 7. Flame retardant thermal insulation sheet; 8. Battery module; 9. Connecting plug; 10. Arc-shaped part; 11. Straight part; 12. Fire detection pipe distributor; 13. Fire detection pipe branch pipe; 14. Limiting part; 15. Connecting fixing plate; 16. Plug. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0027] See also Figure 1-Figure 7As shown, the utility model provides a battery pack fire extinguishing structure, including a U-shaped vertical frame 1, a reinforcement base plate 2 is installed on the bottom surface of the inner cavity of the vertical frame 1, a power battery assembly is arranged above the reinforcement base plate 2, the power battery assembly includes multiple groups of bearing assemblies, each group of bearing assemblies is provided with a number of lying battery modules 8, a flame retardant heat insulation sheet 7 is vertically installed between the fitting ends of two adjacent groups of bearing assemblies, a fire extinguishing assembly is installed inside the vertical frame 1; the fire extinguishing assembly includes a fire detection pipe main 4, a plurality of fire detection pipe distributors 12 are installed on the surface of the fire detection pipe main 4, and each fire detection pipe distributor 12 is installed on the surface of the fire detection pipe main 4. Two or single fire detection tube branches 13 are provided on the surface of 12. When the fire detection tube branches 13 are set as two, the fire detection tube branches 13 on both sides are wound around and contact the outer surfaces of the ends of the multiple battery modules 8 in each group of bearing components; when the fire detection tube branch 13 is set as a single, the fire detection tube branch 13 is located directly above the flame retardant insulation sheet 7. First, the battery module 8 is assembled into a single bearing component, and the flame retardant insulation sheet 7 is placed between the two adjacent bearing components, that is, the flame retardant insulation sheet 7 is in contact with the end faces of the battery modules 8 on both sides, which effectively flame retards and insulates. At the same time, according to the layout needs, refer to Figure 2 、 Figure 5 and Figure 6 As shown, two fire detection pipe branches 13 are selected to be installed on the fire detection pipe distributor 12, that is, fire detection pipe branches 13 in contact with the outer surface of the end of the battery module 8 are installed on both sides of the flame retardant thermal insulation plate 7, and the fire detection pipe branches 13 on both sides are wound around and in contact with the outer surface of the end of multiple battery modules 8 in the corresponding bearing components; a single fire detection pipe branch 13 is selected to be installed on the fire detection pipe distributor 12, and is set just above the flame retardant thermal insulation plate 7, and is fixed by the fitting end of the bearing component, and is used for fire fighting of the battery modules 8 in the bearing components on both sides. When the battery module 8 has thermal runaway, the fire detection pipe branch 13 ruptures and sprays to the corresponding position, thereby effectively preventing the battery module 8 from being burned. Now a single tube covers both sides; because it extends into the end of each battery module 8, it ensures that each battery module 8 can achieve point-to-point spray cooling, fire fighting, and fire extinguishing when thermal runaway occurs, avoiding incomplete coverage. Since the fire detection pipe branch 13 is connected to the fire detection pipe distributor 12 and the fire detection pipe main pipe 4, the high-pressure fire fighting agent in the fire detection pipe main pipe 4 is filled into the corresponding fire detection pipe branch 13 along the fire detection pipe distributor 12. When high temperature is encountered locally and the high temperature reaches the working temperature of the fire detection pipe branch 13 or the fire detection pipe main pipe 4, the corresponding position ruptures, and the high-pressure fire fighting agent is sprayed into the high-temperature area to achieve the purpose of cooling, oxygen isolation, and fire extinguishing, thereby improving the fire extinguishing response speed.

[0028] See Figure 7 As shown, when the battery module 8 is vertical, the fire detection pipe main pipe 4 is bent and located in the middle of two adjacent battery modules 8, which adapts to the installation of the fire detection pipe main pipe 4 in the battery module 8 under different layout states. There are two fire detection pipe main pipes 4, which are respectively located at the upper and lower ends of the vertical battery module 8, thereby improving its applicability.

[0029] See Figure 1 and Figure 2 As shown, baffles 3 are fitted on both side ends of the reinforced bottom plate 2, and multiple groups of load-bearing components are installed between the two baffles 3. Each group of load-bearing components includes two limiting frames 6. Several arc-shaped portions 10 are provided inside the limiting frames 6. The interior of each arc-shaped portion 10 is adapted to be installed with the outer surface of the battery module 8, that is, the two end ends of multiple battery modules 8 are respectively slid into the arc-shaped portions 10 in the corresponding limiting frames 6, thereby realizing the assembly of the power battery assembly.

[0030] See Figure 2 and Figure 4 As shown, straight portions 11 are provided inside the limiting frame 6 and above and below the arc-shaped portion 10. The straight portion 11 forms a gap for the battery cell module 8. This gap is used for the passage of the fire detection tube branch 13 that is arranged in a loop, that is, the fire detection tube branch 13 is in contact with the outer surface of the end of each battery cell module 8. The top ends of the two adjacent limiting frames 6 are provided with the same single connecting fixing plate 15. There are two connecting fixing plates 15. The upper surface of the limiting frame 6 is provided with a limiting portion 14 for locking the single fire detection tube branch 13. The two adjacent limiting frames 6 and the flame retardant heat insulation plate 7 are fixed by the connecting fixing plate 15 to ensure the stable placement of the battery cell module 8.

[0031] See Figure 1 and Figure 3 As shown, a connecting plug 9 is installed on one side surface of the vertical frame 1, and the connecting plug 9 is connected to the fire detection pipe main pipe 4, and a one-way valve is provided on the connecting plug 9. The one-way valve is used. After the product is produced, the fire-fighting agent is filled in through the connecting plug 9. The fire-fighting agent flows along the connecting plug 9 and cannot flow back to ensure safety during transportation and storage. A pressure sensor 5 is installed at the end of the fire detection pipe main pipe 4 on the inner wall surface of the vertical frame 1. When the fire-fighting agent pressure in the fire detection pipe branch pipe 13 or the fire detection pipe main pipe 4 drops below the threshold, an alarm is issued to remind the staff to perform maintenance; a plug 16 is provided at the end of the fire detection pipe branch pipe 13, and an upper cover is adapted to be installed on the top surface of the vertical frame 1, and the upper cover and the interior of 1 are both provided with flame-retardant and heat-insulating materials.

[0032] When the present invention is in use, the battery module 8 is assembled into a single bearing assembly, and a flame retardant heat insulation sheet 7 is placed between two adjacent bearing assemblies to effectively flame retard and heat insulate. At the same time, according to the layout needs, two or a single fire detection pipe branch 13 is selected to be installed on the fire detection pipe distributor 12, that is, fire detection pipe branches 13 in contact with the end faces of the battery module 8 are installed on both sides of the flame retardant heat insulation sheet 7, and the fire detection pipe branches 13 on both sides are wound around and in contact with the outer surfaces of the ends of multiple battery modules 8 in the corresponding bearing assemblies; a single fire detection pipe branch 13 is selected to be installed on the fire detection pipe distributor 12, and is arranged just above the flame retardant heat insulation sheet 7, and is fixed by the fitting end of the bearing assembly for fire protection of the battery modules 8 in the bearing assemblies on both sides. After the core module 8 has thermal runaway, the fire detection pipe branch 13 ruptures and sprays toward the corresponding position to achieve double-sided coverage by a single pipe; since it extends into the end of each battery cell module 8, it ensures that each battery cell module 8 can achieve point-to-point spraying for cooling, fire fighting, and fire extinguishing when thermal runaway occurs, avoiding incomplete coverage. Since the fire detection pipe branch 13 is connected to the fire detection pipe distributor 12 and the fire detection pipe main pipe 4, the high-pressure fire-fighting agent in the fire detection pipe main pipe 4 is filled into the corresponding fire detection pipe branch 13 along the fire detection pipe distributor 12. When high temperature is encountered locally and the high temperature reaches the working temperature of the fire detection pipe branch 13 or the fire detection pipe main pipe 4, the corresponding position ruptures, and the high-pressure fire-fighting agent is sprayed toward the high-temperature area to achieve the purpose of cooling, oxygen isolation, and fire extinguishing, thereby improving the fire extinguishing response speed.

[0033] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fire extinguishing structure for a battery pack, comprising a U-shaped frame (1), characterized in that: A reinforcement base plate (2) is installed on the bottom surface of the inner cavity of the vertical frame (1), and a power battery assembly is arranged above the reinforcement base plate (2), and the power battery assembly includes multiple groups of bearing assemblies; Each group of bearing components is provided with a plurality of lying or vertical electric core modules (8); a flame retardant heat insulating sheet (7) is vertically installed between the mating ends of two adjacent groups of bearing components; a fire extinguishing component is installed inside the vertical frame (1); the fire extinguishing component includes a fire detection pipe main (4); a plurality of fire detection pipe distributors (12) are installed on the surface of the fire detection pipe main (4); and a plurality of or a single fire detection pipe branch (13) is provided on the surface of each fire detection pipe distributor (12); When the battery module (8) is in a lying position, when the number of fire detection pipe branches (13) is multiple, the fire detection pipe branches (13) on both sides are arranged in a winding manner and contact the outer surfaces of the ends of the multiple battery modules (8) in each group of the bearing assembly; when the number of fire detection pipe branches (13) is single, the fire detection pipe branch (13) is located directly above the flame retardant heat insulation sheet (7).

2. A fire extinguishing structure for a battery pack according to claim 1, characterized in that: Baffles (3) are fitted on both side ends of the reinforced bottom plate (2), and multiple groups of bearing components are installed between the two baffles (3).

3. The fire extinguishing structure for a battery pack according to claim 1, characterized in that: Each group of bearing components includes two limiting frames (6), the interior of the limiting frames (6) is provided with a plurality of arc-shaped portions (10), and the interior of each arc-shaped portion (10) is adapted to be installed with the outer surface of the battery core module (8).

4. A fire extinguishing structure for a battery pack according to claim 3, characterized in that: A straight portion (11) is provided inside the limiting frame (6) and adjacent to the upper and lower sides of the arc-shaped portion (10). The straight portion (11) forms a gap for the battery module (8). The gap is used for the passage of a fire detection tube branch (13) arranged in a winding manner.

5. The fire extinguishing structure for a battery pack according to claim 3, characterized in that: The ends of the top surfaces of two adjacent limiting frames (6) are provided with a single connecting fixing piece (15), and two connecting fixing pieces (15) are provided.

6. A fire extinguishing structure for a battery pack according to claim 3, characterized in that: A limiting portion (14) for locking a single fire detection tube branch (13) is provided downwardly on the upper surface of the limiting frame (6).

7. The fire extinguishing structure for a battery pack according to claim 1, characterized in that: A connecting plug (9) is installed on one side surface of the vertical frame (1), the connecting plug (9) is connected to the main fire detection pipe (4), and a one-way valve is provided on the connecting plug (9). A pressure sensor (5) is installed on the inner wall surface of the vertical frame (1) at the end of the main fire detection pipe (4).

8. The fire extinguishing structure for a battery pack according to claim 1, characterized in that: The end of the fire detection pipe branch (13) is provided with a plug (16).

9. The fire extinguishing structure for a battery pack according to claim 1, characterized in that: The top surface of the vertical frame (1) is adapted to be mounted with an upper cover, and the upper cover and the interior of (1) are both provided with flame retardant heat insulating materials.

10. The fire extinguishing structure for a battery pack according to claim 1, characterized in that: When the battery core modules (8) are vertical, the fire detection tube main pipe (4) is bent and located in the middle of two adjacent battery core modules (8).

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