Fire extinguishing device with built-in hot start

Abstract

The utility model relates to a built-in fire extinguishing device for hot start. The built-in fire extinguishing device comprises a shell structure, a fire extinguishing agent unit and a thermosensitive part, the shell structure is connected with the battery pack to form a cavity structure; the fire extinguishing agent unit and the thermosensitive part are arranged in the shell structure and located on the inner side of the cavity structure, and the thermosensitive part and the fire extinguishing agent unit are connected or adjacently arranged. According to the built-in fire extinguishing device for hot start, the fire extinguishing agent unit and the thermosensitive part are located on the inner side of the cavity structure, and the thermosensitive part cannot be in contact with electrolyte splashed by thermal runaway of an external battery pack, so that the technical problem that the fire extinguishing device cannot be started due to fire interruption of the thermosensitive part is solved. The fire extinguishing agent unit and the thermosensitive part are positioned on the inner side of the cavity structure and are integrally arranged, so that a space for placing a thermal initiator does not need to be arranged outside, and the integration degree of the battery pack is conveniently improved; and the thermal initiator is arranged inside, so that the used length of the thermal initiator can be reduced, and the product cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fire extinguishers, in particular to a hot-start built-in fire extinguishing device. Background Art

[0002] Existing fire extinguishing devices that use thermal initiators as starting components all use the method of extending the thermal initiator out of the device to detect fire conditions and trigger the device to implement fire extinguishing. For large spaces such as cabinets, boxes or rooms, this fire extinguishing method can improve detection accuracy and respond in time to extinguish the fire. However, for new application scenarios such as electrochemical energy storage, such as miniaturized application scenarios such as battery packs, first, it is necessary to miniaturize the fire extinguishing device and simplify the detection method. This external thermal initiator method obviously cannot meet the miniaturization requirements. Due to thermal runaway of the battery pack, the electrolyte will splash, and the part of the thermal initiator exposed outside the device will be disconnected after contacting the electrolyte, resulting in the inability to start the fire extinguishing device, and thus unable to implement effective fire extinguishing. Therefore, the existing method of extending the thermal initiator out of the device is not suitable for application scenarios of electrochemical energy storage. Utility Model Content

[0003] The utility model aims to solve the technical problem in the prior art that the existing method of extending the thermal initiator out of the device is not suitable for the application scenario of electrochemical energy storage, and provides a heat-start built-in fire extinguishing device.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A heat-start built-in fire extinguishing device comprises: a shell structure, a fire extinguishing agent unit and a heat-sensitive component;

[0006] The housing structure is connected to the battery pack to form a chamber structure;

[0007] The fire extinguishing agent unit and the heat-sensitive component are arranged in the shell structure, and the fire extinguishing agent unit and the heat-sensitive component are located inside the chamber structure, and the heat-sensitive component is connected to or adjacent to the fire extinguishing agent unit.

[0008] Further: the housing structure comprises: a first housing and a second housing;

[0009] The first housing is used to connect to the battery pack;

[0010] The second shell is connected to the inner side of the first shell, and the fire extinguishing agent unit and the heat-sensitive component are arranged in the second shell.

[0011] Furthermore: the fire extinguishing agent unit and the heat-sensitive component are externally coated with a moisture-proof bag.

[0012] Furthermore: the moisture-proof bag is a plastic bag or a plastic film.

[0013] Furthermore: the fire extinguishing agent unit is configured as a plurality of evenly distributed block structures.

[0014] Further: the heat-sensitive component is a heat-sensitive medicine module, and the heat-sensitive medicine module is configured as a block structure;

[0015] The heat-sensitive agent module is arranged in the fire-extinguishing agent unit, and the heat-sensitive agent replaces the position of any one of the fire-extinguishing agent units.

[0016] Furthermore, the heat-sensitive component is a heat-sensitive wire, and the heat-sensitive wire is connected to at least one of the fire-extinguishing agent units.

[0017] The hot-start built-in fire extinguishing device provided by the utility model has at least the following beneficial effects or advantages:

[0018] The utility model provides a heat-start built-in fire extinguishing device, in which the shell structure is connected to the battery pack to form a chamber structure; the fire extinguishing agent unit and the thermal sensitive component are arranged in the shell structure, and the fire extinguishing agent unit and the thermal sensitive component are located inside the chamber structure, and the thermal sensitive component is connected to or adjacent to the fire extinguishing agent unit. Since the fire extinguishing agent unit and the thermal sensitive component are located inside the chamber structure, the thermal sensitive component will not contact the electrolyte splashed by the external battery pack due to thermal runaway, so the thermal sensitive component will not be cut off and cause the technical problem that the fire extinguishing device cannot be started. On the other hand, since the fire extinguishing agent unit and the thermal sensitive component are located inside the chamber structure, the fire extinguishing agent unit and the thermal sensitive component are integrated, and there is no need to set up a space for placing the thermal initiator outside, which is convenient for improving the integration of the battery pack; the thermal initiator is built in, which can reduce the length used by the thermal initiator and reduce the product cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a hot-start built-in fire extinguishing device provided in an embodiment of the utility model;

[0020] Figure 2 Another structural schematic diagram of the hot-start built-in fire extinguishing device provided in an embodiment of the utility model.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1-shell structure, 11-first shell, 12-second shell, 2-fire extinguishing agent unit, 3-thermal sensitive component, 31-thermal sensitive agent module, 32-thermal sensitive wire. DETAILED DESCRIPTION

[0023] The utility model aims to solve the technical problem in the prior art that the existing method of extending the thermal initiator out of the device is not suitable for the application scenario of electrochemical energy storage, and provides a heat-start built-in fire extinguishing device.

[0024] 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 of 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.

[0025] The utility model embodiment provides a heat-start built-in fire extinguishing device, such as Figure 1 and Figure 2 As shown, it includes: a shell structure 1, a fire extinguishing agent unit 2 and a thermal sensitive component 3. Among them, the shell structure 1 is connected to the battery pack to form a chamber structure, and the shell structure 1 can be set as a part of the battery pack structure. After the shell structure 1 and the battery pack are connected, an integral battery pack module is formed. The fire extinguishing agent unit 2 and the thermal sensitive component 3 are arranged in the shell structure 1, and the fire extinguishing agent unit 2 and the thermal sensitive component 3 are located on the inner side of the chamber structure. The thermal sensitive component 3 is connected to or adjacent to the fire extinguishing agent unit 2, and the fire extinguishing agent unit 2 is ignited by the thermal sensitive component 3.

[0026] Specifically, Figure 1 and Figure 2 As shown, the housing structure 1 provided in this embodiment includes: a first housing 11 and a second housing 12; the first housing 11 is used to connect with the battery pack, and its connection method is not limited here, for example, it can be fixed by snapping, screwing or welding. The second housing 12 is fixed to the inside of the first housing 11, and its connection method is not limited here. For example, in this embodiment, the second housing 12 is fixedly connected to the first housing 11 by snapping. The fire extinguishing agent unit 2 and the thermal sensitive component 3 are arranged in the second housing 12.

[0027] In order to prevent the fire extinguishing agent unit 2 and the heat-sensitive component 3 from getting damp and affecting the reliability of the product, in a preferred embodiment provided by the utility model, the fire extinguishing agent unit 2 and the heat-sensitive component 3 are externally coated with a moisture-proof bag; specifically, the moisture-proof bag is a plastic bag or a plastic film; there are two ways of coating the moisture-proof bag, the first is to coat each fire extinguishing agent unit 2 and the heat-sensitive component 3 with a moisture-proof bag separately, and the second is to coat the fire extinguishing agent unit 2 and the heat-sensitive component 3 as a whole with a moisture-proof bag after the fire extinguishing agent unit 2 and the heat-sensitive component 3 are arranged; the first coating method has a better moisture-proof effect, while the second coating method has a lower production cost.

[0028] In a preferred embodiment provided by the present utility model, Figure 1 and Figure 2 As shown, the fire extinguishing agent unit 2 is configured as a plurality of evenly distributed block structures, for example, the fire extinguishing agent is configured as a block structure with a specification of 50 mm long × 28 mm wide × 10.5 mm high, and the number is configured as 2-24 blocks. Figure 1 As shown, the heat-sensitive component 3 is a heat-sensitive agent module 31, which is configured as a block structure, and its size specifications are consistent with the size specifications of a single fire extinguishing agent. The heat-sensitive agent module 31 is arranged in the fire extinguishing agent unit 2, and the heat-sensitive agent replaces the position of any fire extinguishing agent unit 2. In addition, as Figure 2 As shown, the heat-sensitive element 3 may also be a heat-sensitive wire 32 , which is connected to at least one fire-extinguishing agent unit 2 , and a plurality of sections of the heat-sensitive wire 32 are cut and arranged in parallel above the fire-extinguishing agent.

[0029] like Figure 1 and Figure 2 As shown, the working process of the heat-start built-in fire extinguishing device provided by the embodiment of the utility model is as follows: when a fire occurs, the temperature outside the battery pack rises sharply, ignites the thermal sensitive component 3, and ignites the fire extinguishing agent through the thermal sensitivity. The starting temperature of the thermal sensitive agent and the thermal sensitive line 32 is 170°C ± 20°C. The fire extinguishing agent sprays outward to extinguish the fire.

[0030] like Figure 1 and Figure 2 As shown, the hot-start built-in fire extinguishing device provided by the embodiment of the utility model has at least the following beneficial effects or advantages:

[0031] The heat-start built-in fire extinguishing device provided by the embodiment of the utility model has a shell structure 1 connected to the battery pack to form a chamber structure; the fire extinguishing agent unit 2 and the thermal sensitive component 3 are arranged in the shell structure 1, and the fire extinguishing agent unit 2 and the thermal sensitive component 3 are located on the inner side of the chamber structure, and the thermal sensitive component 3 is connected to or adjacent to the fire extinguishing agent unit 2. In the heat-start built-in fire extinguishing device, since the fire extinguishing agent unit 2 and the thermal sensitive component 3 are located on the inner side of the chamber structure, the thermal sensitive component 3 will not contact the electrolyte splashed by the external battery pack due to thermal runaway, so the thermal sensitive component 3 will not be cut off and cause the technical problem that the fire extinguishing device cannot be started. On the other hand, since the fire extinguishing agent unit 2 and the thermal sensitive component 3 are located on the inner side of the chamber structure, the fire extinguishing agent unit 2 and the thermal sensitive component 3 are integrated, and there is no need to set up a space for placing the thermal initiator on the outside, which is convenient for improving the integration of the battery pack; the thermal initiator is built in, which can reduce the length used by the thermal initiator and reduce the product cost.

[0032] In the description of the present utility model, it should be noted that the terminology nouns in the various embodiments, such as words indicating directions such as "upper", "lower", "front", "back", "left", "right", etc., are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the referred elements and devices must be operated according to the specific directions and specified operations and methods and structures in the specification. Such directional nouns do not constitute limitations on the present utility model.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hot-start built-in fire extinguishing device, characterized in that: include: A shell structure (1), a fire extinguishing agent unit (2) and a heat-sensitive component (3); The housing structure (1) is connected to the battery pack to form a chamber structure; The fire extinguishing agent unit (2) and the heat-sensitive component (3) are arranged in the shell structure (1), and the fire extinguishing agent unit (2) and the heat-sensitive component (3) are located inside the chamber structure, and the heat-sensitive component (3) is connected to or adjacent to the fire extinguishing agent unit (2).

2. The hot-start built-in fire extinguishing device according to claim 1, characterized in that: The housing structure (1) comprises: a first housing (11) and a second housing (12); The first housing (11) is used to be connected to a battery pack; The second shell (12) is connected to the inner side of the first shell (11), and the fire extinguishing agent unit (2) and the heat-sensitive element (3) are arranged in the second shell (12).

3. The hot-start built-in fire extinguishing device according to claim 1 or 2, characterized in that: The fire extinguishing agent unit (2) and the heat-sensitive component (3) are externally coated with a moisture-proof bag.

4. The hot-start built-in fire extinguishing device according to claim 3, characterized in that: The moisture-proof bag is a plastic bag or a plastic film.

5. The hot-start built-in fire extinguishing device according to claim 1, characterized in that: The fire extinguishing agent unit (2) is arranged as a plurality of evenly distributed square-shaped structures.

6. The hot-start built-in fire extinguishing device according to claim 5, characterized in that: The heat-sensitive component (3) is a heat-sensitive medicine module (31), and the heat-sensitive medicine module (31) is configured as a block structure; The heat-sensitive agent module (31) is arranged in the fire-extinguishing agent unit (2), and the heat-sensitive agent replaces the position of any one of the fire-extinguishing agent units (2).

7. The hot-start built-in fire extinguishing device according to claim 5, characterized in that: The heat-sensitive component (3) is a heat-sensitive wire (32), and the heat-sensitive wire (32) is connected to at least one of the fire-extinguishing agent units (2).

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