Thermal runaway suppression module and battery box

Abstract

The thermal runaway suppression module comprises a first pipeline and a second pipeline which are communicated with each other, the first pipeline and the second pipeline are each of a hollow structure, and fire fighting media are stored in the first pipeline and the second pipeline; the first pipeline fractures under the influence of adaptive temperature; and the second pipeline is a flexible pipeline. The first pipeline and the second pipeline are arranged to be used for storing the fire fighting medium, and the first pipeline is fractured under the influence of adaptive temperature, so that when the battery module in the battery box is subjected to thermal runaway, the first pipeline can be fractured to release the fire fighting medium, and the thermal runaway part is subjected to cooling suppression; meanwhile, the second pipeline is used as an additional accommodating assembly of the fire-fighting medium, so that the thermal runaway suppression module has more fire-fighting medium, and the fire-fighting effect of the thermal runaway suppression module is improved; and the second pipeline is a flexible pipeline, so that the shape is convenient to adjust, the important position of the battery box is prevented from being occupied, and the installation of the battery assembly is prevented from being interfered.

Description

Technical Field

[0001] The utility model relates to the technical field of battery boxes, in particular to a thermal runaway suppression module and a battery box. Background Art

[0002] As a common energy storage component, the battery box is widely used in new energy electric vehicles and energy storage containers. To ensure the normal operation of the battery box, several auxiliary components are usually set. For example, water-cooling or air-cooling components are set for cooling the battery modules in the battery box to avoid problems such as abnormal temperature rise and thermal runaway of the battery modules. The battery box is also provided with a thermal runaway suppression component, which is used for the protection of the battery when thermal runaway occurs, mainly to suppress thermal runaway and avoid diffusion.

[0003] The existing utility model patent with the authorized announcement number CN216432631U discloses a self-exploding heat pipe for a battery, including a heat pipe body with a hollow structure. The characteristics are that a fire-fighting heat-conducting medium is stored in the hollow structure of the heat pipe body; a self-exploding device is arranged in the heat pipe body; when the temperature of the heat pipe reaches the threshold value, the self-exploding device in the heat pipe body is activated, and the generated pressure causes the weak part of the heat pipe body to burst, releasing the fire-fighting heat-conducting medium, thereby preventing or extinguishing the fire inside the battery or the battery box.

[0004] In the above solution, the heat pipe body is used to store the fire-fighting heat-conducting medium. Due to the limited volume of the heat pipe body itself, the amount of fire-fighting heat-conducting medium that can be stored is small, and the thermal runaway suppression effect that can be achieved is limited. If the technical means of externally supplying the fire-fighting medium is adopted, there will be a risk of liquid leakage in the battery box due to pipeline joint problems; moreover, the external liquid supply component introducing pipelines into the battery box will also cause the sealing performance of the battery box to deteriorate and make the structure of the battery box more complex. Summary of the Utility Model

[0005] In view of this, the utility model provides a thermal runaway suppression module and a battery box with small volume, good fire-fighting effect, and no need for external components to supply the fire-fighting medium, so as to solve the problems that the fire-fighting effect of the existing thermal runaway suppression device for the battery box is limited, and the use of external liquid supply affects the sealing performance and there is a risk of liquid leakage.

[0006] The technical solution of the utility model is realized as follows:

[0007] On the one hand, the utility model provides a thermal runaway suppression module and a battery box, including a first pipeline and a second pipeline that are interconnected. Among them,

[0008] Both the first pipeline and the second pipeline are of hollow structure, and a fire-fighting medium is stored in the first pipeline and the second pipeline;

[0009] The first pipeline ruptures under the influence of the adapted temperature;

[0010] The second pipeline is a flexible pipeline.

[0011] Based on the above technical solutions, preferably, the first pipeline is a rigid pipeline or a flexible pipeline.

[0012] Based on the above technical solutions, preferably, the second pipeline is arranged in a spiral coil.

[0013] Based on the above technical solutions, preferably, a puncture valve or a blasting component is installed on the first pipeline.

[0014] Based on the above technical solutions, preferably, the first pipeline is a heat-sensitive pipe.

[0015] Based on the above technical solutions, preferably, the diameter of the second pipeline is smaller than that of the first pipeline.

[0016] Based on the above technical solutions, preferably, the fire-fighting medium is perfluoroacetone or heptafluoropropane.

[0017] On the other hand, the present utility model provides a battery box, which includes the above-mentioned thermal runaway suppression module, and also includes a box body and a box cover. Among them,

[0018] The box body is used to accommodate the battery module;

[0019] The box cover is arranged on the box body to seal the box body;

[0020] The thermal runaway suppression module is arranged inside the battery box.

[0021] Based on the above technical solutions, preferably, the thermal runaway suppression module is arranged on the box body and / or the box cover.

[0022] Based on the above technical solutions, preferably, the thermal runaway suppression module is adhesively fixed to the box body and / or the box cover with an adhesive.

[0023] The thermal runaway suppression module and the battery box of the present utility model have the following beneficial effects compared with the prior art:

[0024] (1) By providing a first pipeline and a second pipeline for storing fire extinguishing medium, and the first pipeline ruptures under the influence of the adapted temperature. Thus, when a thermal runaway occurs in the battery module within the battery box, the first pipeline can rupture to release the fire extinguishing medium, thereby cooling and suppressing the thermal runaway location, and ensuring the safety performance of the battery module. At the same time, as an additional accommodating component for the fire extinguishing medium, the second pipeline enables this thermal runaway suppression module to have more fire extinguishing medium, thus improving the fire extinguishing effect of this thermal runaway suppression module. And the second pipeline is a flexible pipeline, which is convenient for adjusting the shape to avoid occupying important positions in the battery box and preventing interference with the installation of battery components. (2) By setting the diameter of the second pipeline to be smaller than that of the first pipeline, after the first pipeline ruptures, the fire extinguishing medium in the second pipeline can flow better into the first pipeline, avoiding residue, so that the fire extinguishing medium can fully play the role of thermal runaway suppression.

[0025] (3) This thermal runaway suppression module is arranged on the battery box body and / or the box cover in an adhesive manner. Thus, it has the advantage of convenient assembly, without additional fastening components, which is beneficial to ensuring the energy density of the battery box and preventing interference in component assembly. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Is a perspective view of the thermal runaway suppression module of the present invention;

[0028] Figure 2 Is a perspective view of the battery box of the present invention;

[0029] Figure 3 Is an exploded view of the battery box of the present invention;

[0030] Figure 4 Is a perspective view of the interior of the battery box of the present invention with the thermal runaway suppression module installed;

[0031] In the figure: 1, the first pipeline; 2, the second pipeline; 3, the box body; 4, the box cover. Detailed Embodiments

[0032] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] As Figures 1 to 4 shown, the thermal runaway suppression module of the present utility model includes a first pipeline 1 and a second pipeline 2;

[0034] The battery box of the present utility model includes the above-mentioned thermal runaway suppression module, and further includes a box body 3 and a box cover 4.

[0035] As Figure 1 shown, the first pipeline 1 and the second pipeline 2 are connected and communicated; both the first pipeline 1 and the second pipeline 2 are of a hollow structure, and a fire extinguishing medium is stored in the first pipeline 1 and the second pipeline 2; the first pipeline 1 is ruptured under the influence of the adapted temperature;

[0036] In the above structure, when the first pipeline 1 is working, it will be ruptured by heat. In this way, the fire extinguishing medium in the first pipeline 1 and the second pipeline 2 is ejected to achieve the fire extinguishing work;

[0037] This structure does not require an additional liquid supply component to supply the fire extinguishing medium. It can quickly release the fire extinguishing medium, and there is no transportation stage of the fire extinguishing medium in the middle. Therefore, the fire extinguishing rate can be effectively improved to ensure the reliability of the work;

[0038] At the same time, the second pipeline 2 is used to store the fire extinguishing medium additionally, which can effectively increase the capacity of the fire extinguishing medium, thereby improving the fire extinguishing performance.

[0039] Specifically, for the rupture measure of the first pipeline 1, a puncture valve control or a blasting component control is adopted. When the application environment reaches the temperature required for fire extinguishing, the puncture valve acts to puncture the first pipeline 1 to output the fire extinguishing medium; or the blasting component can blast the first pipeline 1; the blasting component can adopt explosives.

[0040] Specifically, the first pipeline 1 can adopt a heat-sensitive tube. In this way, after the first pipeline 1 itself is heated, it will automatically rupture when the temperature reaches the threshold value to output the fire extinguishing medium inside.

[0041] Specifically, the first pipeline 1 is a rigid pipeline or a flexible pipeline;

[0042] When the first pipe 1 adopts a rigid pipe, it can be prefabricated according to the structure of the battery box and the layout of the internal components. When the first pipe 1 adopts a flexible pipe, its shape can be adjusted adaptively during assembly to prevent interference with the assembly of the internal components of the battery box and enable the first pipe 1 to better correspond to the position where the battery module needs fire suppression.

[0043] Among them, the second pipe 2 is a flexible pipe. In this way, it is convenient to adjust the shape of the second pipe 2 to prevent interference with the assembly of the internal components of the battery box;

[0044] Specifically, the second pipe 2 is arranged in a spiral coil. This can reduce the space occupied by the second pipe 2 and avoid excessive occupation of the internal space of the battery box, resulting in interference with the assembly of components.

[0045] Specifically, the diameter of the second pipe 2 is smaller than that of the first pipe 1;

[0046] With such a structure, after the first pipe 1 ruptures, due to the small diameter of the second pipe 2, it is convenient for the fire extinguishing medium to flow into the first pipe 1, avoiding residue of the fire extinguishing medium. At the same time, it can prevent the fire extinguishing medium from flowing from the first pipe 1 into the second pipe 2, thereby ensuring the fire extinguishing effect of this thermal runaway suppression module.

[0047] Specifically, the first pipe 1 and the second pipe 2 can adopt metal bellows, so that the pipes can be bent, but maintain good structural strength in the radial direction, thereby ensuring the flow of the fire extinguishing medium.

[0048] Specifically, the fire extinguishing medium is perfluoroacetone or heptafluoropropane.

[0049] As Figures 2 to 4 shown, the box body 3 is used to accommodate the battery module; the box cover 4 is arranged on the box body 3 to seal the box body 3; the thermal runaway suppression module is arranged in the battery box;

[0050] With the above structure, when the battery module in the box body 3 has abnormal temperature rise or thermal runaway, the first pipe 1 of the thermal runaway suppression module ruptures, and the fire extinguishing medium is ejected to carry out fire extinguishing work on the battery module.

[0051] Furthermore, the thermal runaway suppression module is arranged on the box body 3 and / or the box cover 4; when specifically arranging the thermal runaway suppression module, it can be installed according to the layout of the battery modules in the battery box.

[0052] Specifically, the thermal runaway suppression module is adhesively fixed to the box body 3 and / or the box cover 4 with an adhesive. In this way, it has the advantage of convenient assembly, without additional fastening components, which is beneficial to ensuring the energy density of the battery box and preventing interference with the assembly of components.

[0053] Specific implementation steps:

[0054] In the box body 3 of the battery box, components such as battery modules and power management modules are installed. Then, for the installation positions of the components, a first pipeline 1 and a second pipeline filled with fire-fighting medium are provided on the box cover 4, and then the box cover 4 is buckled onto the box body 3. In this way, when thermal runaway occurs inside the battery box, the first pipeline 1 bursts and sprays out the fire-fighting medium to suppress thermal runaway.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermal runaway suppression module, characterized in that: It comprises a first pipeline (1) and a second pipeline (2) which are interconnected, wherein: The first pipe (1) and the second pipe (2) are both hollow structures, and firefighting medium is stored in the first pipe (1) and the second pipe (2); The first pipe (1) is broken due to the adaptation temperature; The second pipeline (2) is a flexible pipeline.

2. The thermal runaway suppression module according to claim 1, characterized in that: The first pipeline (1) is a rigid pipeline or a flexible pipeline.

3. The thermal runaway suppression module according to claim 1, characterized in that: The second pipe (2) is arranged in a spiral coil.

4. The thermal runaway suppression module according to claim 1, characterized in that: The first pipe (1) is provided with a puncture valve or a bursting assembly.

5. The thermal runaway suppression module according to claim 1, characterized in that: The first pipe (1) is a thermally sensitive pipe.

6. The thermal runaway suppression module according to any one of claims 1 to 5, characterized in that: The diameter of the second pipe (2) is smaller than the diameter of the first pipe (1).

7. The thermal runaway suppression module according to any one of claims 1 to 5, characterized in that: The fire fighting medium is perfluoroacetone or heptafluoropropane.

8. A battery box, characterized in that: The thermal runaway suppression module comprises the thermal runaway suppression module according to any one of claims 1 to 7, and further comprises a box body (3) and a box cover (4), wherein: The box (3) is used to accommodate the battery module; The box cover (4) is arranged on the box body (3) to seal the box body (3); The thermal runaway suppression module is disposed in the battery box.

9. The battery box according to claim 8, characterized in that: The thermal runaway suppression module is arranged on the box body (3) and / or the box cover (4).

10. The battery box according to claim 9, characterized in that: The thermal runaway suppression module is bonded and fixed to the box body (3) and / or the box cover (4) by an adhesive.

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