Internal fire extinguishing system of battery pack

Abstract

The utility model discloses a battery pack internal fire extinguishing system which comprises a battery pack, a surrounding part is arranged on the periphery of the battery pack, two fire extinguishing devices are symmetrically arranged on the two opposite side walls of the exterior of the surrounding part, injection pipes are arranged on the four fire extinguishing devices, the injection pipes are communicated to the interior of the surrounding part, and the injection pipes are communicated with the interior of the surrounding part. A protective cover is slidably arranged on the top of the surrounding part, and a smoke alarm and a temperature sensor are installed at the bottom of the protective cover. According to the utility model, the telescopic rod begins to retract, so that the protective cover moves downwards to cover the square frame, and the interior of the square frame is ensured to be in a completely sealed state, thereby achieving the effect of isolating external oxygen from entering, enabling the battery pack to lose the combustion condition of oxygen, controlling the combustion fire behavior of the battery pack, and prolonging the service life of the battery pack. Therefore, further loss of surrounding equipment is reduced, and safety of passengers is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to an internal fire protection system of a battery pack. Background Art

[0002] With the rapid development of new energy related technology industries, battery packs are widely used as power sources in new energy electric vehicles, energy storage equipment, power grids and other fields. However, due to the inherent problems of battery packs, the quality problems of various battery pack technologies and the influence of external environmental factors, battery packs will have certain safety issues, which may cause fires and spontaneous combustion accidents in new energy electric or energy storage equipment.

[0003] Moreover, as the number of battery pack charge and discharge cycles increases, the battery pack expansion force and the internal resistance of the battery cell will increase, which may cause the battery to catch fire or even cause the battery pack to explode, threatening the lives of passengers or causing burn damage to surrounding facilities. In particular, the battery pack is usually large in size. When the battery pack burns excessively and the fire gets out of control, it will be very difficult to extinguish the fire at this time, and the losses caused will also be huge. Therefore, higher requirements are put forward for the safety of battery packs against uncontrolled combustion.

[0004] To this end, the utility model provides a battery pack internal fire protection system to solve the above problems. Utility Model Content

[0005] The utility model provides an internal fire protection system for a battery pack, which starts to retract through a telescopic rod, so that the protective cover moves downward to cover the square frame, ensuring that the interior of the square frame is in a completely sealed state, thereby isolating the entry of external oxygen, making the battery pack lose the combustion conditions of oxygen, and controlling the fire of the battery pack, thereby reducing further losses of surrounding equipment and ensuring the safety of passengers, thereby solving the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above objectives, the utility model provides the following technical solutions:

[0007] A battery pack internal fire protection system comprises a battery pack, wherein an enclosing component is arranged around the battery pack, two fire extinguishing devices are symmetrically arranged on two opposite side walls outside the enclosing component, four fire extinguishing devices are provided with injection pipes, and the injection pipes are connected to the interior of the enclosing component, a protective cover is slidably arranged on the top of the enclosing component, and a smoke alarm and a temperature sensor are installed on the bottom of the protective cover.

[0008] Preferably, the surrounding component is a square frame, the battery pack is mounted on the bottom wall inside the square frame, and a local gap is formed around the battery pack and the inside of the square frame.

[0009] Preferably, long strip grooves are provided on the top walls of the four sides of the square frame, and two telescopic rods are provided inside each of the long strip grooves, and the top of the telescopic rods and the bottom of the protective cover are fixedly connected to each other.

[0010] Preferably, the injection pipe is communicated with the long strip groove, and the long strip groove is communicated with the inside of the square frame.

[0011] Preferably, a plurality of through holes are provided on the inner four sides of the square frame, and the plurality of through holes are interconnected with the long strip groove, and the injection pipe, the long strip groove and the through holes are interconnected.

[0012] Preferably, four angular grooves are provided on the top wall of the square frame, and the four angular grooves are respectively located at the four top corners of the square frame, and the bottom of the protective cover is provided with angular columns that are engaged with the four angular grooves.

[0013] Preferably, the four angular grooves are all triangular structures, and the four angular grooves and the angular columns are all provided with inclined surfaces, the inclined surfaces are located on any one side of the angular grooves or the angular columns, and the inclined surfaces of the angular grooves and the angular columns cooperate with each other.

[0014] Compared with the existing technology, the utility model has the following beneficial effects:

[0015] 1. The internal fire protection system of a battery pack described in the utility model starts to retract through the telescopic rod, so that the protective cover moves downward to cover the square frame, ensuring that the interior of the square frame is completely sealed, thereby isolating the entry of external oxygen, making the battery pack lose the oxygen combustion condition, and controlling the fire of the battery pack, thereby reducing further losses of surrounding equipment and ensuring the safety of passengers.

[0016] 2. The internal fire protection system of a battery pack described in the utility model introduces inert gas into a sealed square frame so that the inert gas fills the entire square frame, making the square frame completely oxygen-free, thereby completely depriving the battery pack of oxygen conditions for combustion, thereby achieving the effect of extinguishing the fire, ultimately avoiding further losses of surrounding equipment, and ensuring the safety of passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of a fire protection system inside a battery pack of the utility model;

[0018] Figure 2 It is a schematic top view of the overall structure of a fire protection system inside a battery pack of the utility model;

[0019] Figure 3 It is a side view schematic diagram of the overall structure of a fire protection system inside a battery pack of the utility model;

[0020] Figure 4 It is a three-dimensional schematic diagram of the internal structure of the square frame of the utility model.

[0021] In the figure: 1. battery pack; 2. fire extinguishing device; 3. spray pipe; 4. protective cover; 5. smoke alarm; 6. temperature sensor; 7. square frame; 8. long strip groove; 9. telescopic rod; 10. through hole; 11. angular groove; 12. angular column; 13. inclined surface. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 4 As shown, the utility model provides a battery pack 1 internal fire protection system, including a battery pack 1, and a surrounding component is arranged around the battery pack 1, the surrounding component is a square frame 7, which is used to protect the battery pack 1 and isolate surrounding facilities, so that when the battery pack 1 burns, it can burn in the square frame 7 as much as possible to avoid the spread of fire. The battery pack 1 is installed on the bottom wall inside the square frame 7, and a local gap is formed around the battery pack 1 and the inside of the square frame 7.

[0024] Two fire extinguishing devices 2 are symmetrically arranged on two opposite side walls outside the square frame 7, which are used to extinguish fire when the battery pack 1 catches fire inside the square frame 7. The fire extinguishing devices 2 contain inert gas inside, and four fire extinguishing devices 2 are provided with injection pipes 3, which are connected to the inside of the square frame 7, that is, multiple through holes 10 are opened on the four side walls inside the square frame 7, and the multiple through holes 10 are interconnected with the long strip groove 8, and the injection pipe 3, the long strip groove 8, and the through holes 10 are interconnected. The injection pipe 3 is interconnected with the long strip groove 8, and the long strip groove 8 is interconnected with the inside of the square frame 7. When in use, the inert gas in the fire extinguishing device 2 is released through the injection pipe 3, and the inert gas enters the square frame 7 along the long strip groove and the through hole 10 to isolate oxygen, so that the battery pack 1 lacks oxygen conditions for combustion, and the fire extinguishing effect is achieved.

[0025] At the same time, a protective cover 4 is slidably provided on the top of the square frame 7 , and a smoke alarm 5 and a temperature sensor 6 are installed on the bottom of the protective cover 4 for real-time monitoring of the operating state and temperature state of the battery pack 1 .

[0026] Furthermore, long strip grooves 8 are provided on the top walls of the four sides of the square frame 7, and two telescopic rods 9 are provided inside each long strip groove 8, and the top of the telescopic rod 9 is fixedly connected to the bottom of the protective cover 4. When in use, the telescopic rod 9 is used to control the up and down movement of the protective cover 4, thereby realizing the automatic opening and closing function of the protective cover 4.

[0027] Furthermore, four angular grooves 11 are provided on the top wall of the square frame 7, and the four angular grooves 11 are respectively located at the four top corners of the square frame 7. The bottom of the protective cover 4 is provided with angular columns 12 that are mutually engaged with the four angular grooves 11; the four angular grooves 11 are all triangular structures, and the four angular grooves 11 and the angular columns 12 are provided with inclined surfaces 13, and the inclined surfaces 13 are located on any one side of the angular grooves 11 or the angular columns 12, and the inclined surfaces 13 of the angular grooves 11 and the angular columns 12 cooperate with each other. When the protective cover 4 is closed, the triangular columns are tightly engaged with the triangular grooves to ensure that the interior of the square frame 7 is completely sealed to prevent the entry of external oxygen, so that when the internal battery pack 1 burns and consumes the oxygen, it will automatically stop burning, so that the fire of the battery pack 1 is controlled, avoiding further losses of surrounding equipment and ensuring the safety of passengers.

[0028] Working principle: Under normal working conditions, the telescopic rod 9 remains in an extended state, that is, the protective cover 4 remains in an upwardly opened state, so as to facilitate the heat dissipation of the battery pack 1 during normal working conditions; when the battery pack 1 spontaneously ignites due to an accident or catches fire due to external factors, the smoke alarm 5 and the temperature sensor 6 at the bottom of the protective cover 4 both sound an alarm, at which time the telescopic rod 9 begins to retract, so that the protective cover 4 moves downward, covers the square frame 7, and ensures that the inside of the square frame 7 is completely sealed to achieve the effect of isolating the entry of external oxygen, so that when the internal battery pack 1 burns and consumes oxygen, it will gradually stop burning, so that the fire of the battery pack 1 is controlled. At the same time, in order to completely stop the combustion of the battery pack 1, the inert gas is ejected from the injection pipe 3 through the fire extinguishing device 2, and the inert gas enters the square frame 7 along the long strip groove and the through hole 10, filling the entire square frame 7, so that there is no oxygen in the square frame 7, so that the combustion of the battery pack 1 completely loses oxygen conditions, so as to achieve the effect of extinguishing the fire, and finally avoid further losses of surrounding equipment, and ensure the safety of passengers.

[0029] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A battery pack (1) internal fire protection system, comprising a battery pack (1), characterized in that: A surrounding component is arranged around the battery pack (1), two fire extinguishing devices (2) are symmetrically arranged on two opposite side walls outside the surrounding component, four fire extinguishing devices (2) are arranged with injection pipes (3), and the injection pipes (3) are connected to the inside of the surrounding component, a protective cover (4) is slidably arranged on the top of the surrounding component, and a smoke alarm (5) and a temperature sensor (6) are installed on the bottom of the protective cover (4).

2. An internal fire protection system of a battery pack (1) according to claim 1, characterized in that: The surrounding component is a square frame (7), the battery pack (1) is mounted on the bottom wall inside the square frame (7), and a local gap is formed around the battery pack (1) and the inside of the square frame (7).

3. A battery pack (1) internal fire protection system according to claim 2, characterized in that: The top walls of the four sides of the square frame (7) are each provided with a long strip groove (8), and two telescopic rods (9) are arranged inside each of the long strip grooves (8), and the top of the telescopic rod (9) is fixedly connected to the bottom of the protective cover (4).

4. A battery pack (1) internal fire protection system according to claim 3, characterized in that: The injection pipe (3) is communicated with the long strip groove (8), and the long strip groove (8) is communicated with the inside of the square frame (7).

5. A battery pack (1) internal fire protection system according to claim 4, characterized in that: A plurality of through holes (10) are provided on the inner side walls of the square frame (7), and the plurality of through holes (10) are interconnected with the long strip groove (8), and the injection pipe (3), the long strip groove (8) and the through holes (10) are interconnected.

6. A battery pack (1) internal fire protection system according to claim 5, characterized in that: Four angular grooves (11) are provided on the top wall of the square frame (7), and the four angular grooves (11) are respectively located at the four top corners of the square frame (7). The bottom of the protective cover (4) is provided with angular columns (12) that are mutually engaged with the four angular grooves (11).

7. A battery pack (1) internal fire protection system according to claim 6, characterized in that: The four angular grooves (11) are all triangular structures. The four angular grooves (11) and the angular columns (12) are all provided with inclined surfaces (13). The inclined surfaces (13) are located on any one side of the angular grooves (11) or the angular columns (12). The inclined surfaces (13) of the angular grooves (11) and the angular columns (12) cooperate with each other.

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