A new energy automobile battery pack integrated flame retarder

Abstract

This utility model discloses an integrated flame retardant for a new energy vehicle battery pack, including a shell, multiple corrugated plates disposed within the shell, and a foam metal block disposed at one end of the shell. The shell is a one-piece metal structure, with each corrugated plate disposed at the same height within the shell. Each corrugation divides the interior of the shell into multiple flat and bent channels. The foam metal block is L-shaped, with the thicker end of the foam metal block disposed at the lower end of the shell and protruding from the end of the shell. In this utility model, the foam nickel block disposed at the end of the shell, in conjunction with the internal structure design of the flame retardant, can confine the flame and heat to a small area and discharge them through a safe path, thereby reducing the impact on adjacent batteries.

Description

Technical Field

[0001] This utility model relates to an integrated flame retardant for new energy vehicle battery packs. Background Technology

[0002] Besides traffic accidents and bottom impacts, battery thermal runaway is one of the main causes of power battery fires. This phenomenon often occurs due to an uncontrollable rise in battery temperature. Improper charging practices, bottom impacts or scratches, and prolonged immersion in water can all lead to thermal runaway.

[0003] When a single battery cell experiences thermal runaway, timely fire extinguishing and isolation are crucial. Common methods include using cooling fire extinguishing media, isolating the fire with heat-insulating or flame-retardant materials, and venting the flames and hazardous gases through safe pathways.

[0004] Among these measures, isolating the flames with heat-insulating or flame-retardant materials and venting the flames and hazardous gases through safe pathways are important solutions for thermal runaway protection. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated flame retardant for new energy vehicle battery packs, which can confine flames and dangerous gases to a small area and discharge them through a safe path to reduce the impact on adjacent batteries.

[0006] The technical solution of this utility model is: an integrated flame retardant for a new energy vehicle battery pack, comprising a shell, multiple corrugated plates disposed inside the shell, and a foam metal block disposed at one end of the shell;

[0007] The outer shell is a one-piece metal structure, and each of the corrugated plates is set at the same height inside the outer shell. Each of the corrugated plates will divide the interior of the outer shell into multiple flat and curved channels.

[0008] The foam metal block is L-shaped, with the thicker end of the foam metal block located at the lower end of the outer shell, and the thicker end of the foam metal block protruding from the end of the outer shell.

[0009] Specifically, each of the aforementioned corrugated plates is welded to the outer shell as a single unit.

[0010] Furthermore, the topmost corrugated plate is named the first plate, which forms the top plate of the shell.

[0011] Furthermore, the first plate has a concave bending portion in the middle, and a fixing portion is provided at both ends of the first plate. The fixing portion is a concave cylinder with internal threads inside. The bottom of the two fixing portions is kept in contact with the corrugated plate below.

[0012] Furthermore, the bottom corrugated plate forms the base plate of the outer shell.

[0013] Furthermore, each corrugated plate located between the top plate and the bottom plate is provided with multiple staggered through holes.

[0014] Furthermore, the foam metal block is composed of a first foam metal block arranged laterally and a second foam metal block arranged longitudinally.

[0015] Furthermore, the end of the outer casing is also provided with a retainer for fixing the first foam metal block and the second foam metal block.

[0016] Specifically, the cage and the outer shell are integrally formed.

[0017] Furthermore, the retainer is provided with clamping blocks corresponding to the first foam metal block and the second foam metal block respectively.

[0018] The beneficial effects of this utility model are: the foam nickel block set at the end of the outer shell, combined with the internal structure design of the flame retardant, can limit the flame and heat to a small area and discharge them through a safe path, thereby reducing the impact on nearby batteries. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of each waveform board in this utility model.

[0021] In the diagram: 1. Outer shell; 2. Corrugated plate; 3. Foam metal block; 4. Channel; 5. First plate; 6. Bending part; 7. Fixing part; 8. Holder; 9. Clamping block. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0023] Combination Figure 1 and Figure 2 As shown, an integrated flame retardant for a new energy vehicle battery pack includes a housing 1, multiple corrugated plates 2 disposed inside the housing 1, and a foam metal block 3 disposed at one end of the housing 1.

[0024] The outer shell 1 is a one-piece metal structure. The corrugated plates 2 are arranged at the same height inside the outer shell 1. The corrugated plates will divide the interior of the outer shell 1 into multiple flat and bent channels 4.

[0025] The foam metal block 3 is L-shaped, with the thicker end of the foam metal block 3 located at the lower end of the outer shell 1, and the thicker end of the foam metal block 3 protruding from the end of the outer shell 1.

[0026] In the above structure, nickel foam has good fluid permeability, strong fire resistance, and a synergistic effect of heat dissipation and flame retardancy. It can prevent flame propagation and isolate explosions by absorbing heat energy.

[0027] Among them, the shape and structure design of the nickel foam can effectively enhance its heat dissipation and flame retardancy at the bottom, and prevent the high heat at the moment of battery fire from causing deformation at the bottom of the nickel foam, thus preventing it from effectively sealing the end of the outer shell 1.

[0028] Through the special structural design of the outer shell 1 and the corrugated plate 2 inside the outer shell 1, when the battery catches fire, the flame entering the outer shell 1 can be divided into smaller segments, increasing the contact area between the flame and the wall of the channel 4, enhancing the heat transfer effect, and reducing the flame temperature below the ignition point, thereby effectively preventing the spread of the flame; in addition, the wall effect also plays a key role. When the combustible gas passes through the narrow channel 4 of the combustible gas, the probability of free radicals colliding with the wall of the channel 4 increases, and the number of free radicals participating in the reaction decreases. When the channel 4 is narrowed to a certain extent, collision becomes dominant, the number of free radicals drops sharply, and thus the spread of the flame to the unburned gas area is contained;

[0029] The one-piece molded structure of the outer shell 1 ensures its airtightness and prevents flames from escaping from the seams of the outer shell 1, thus avoiding accidents.

[0030] In summary, the foam metal block 3 located at the end of the outer casing 1, in conjunction with the internal structure design of the flame retardant, can confine the flame and heat to a small area, reducing the impact on nearby batteries.

[0031] Specifically, each of the aforementioned corrugated plates 2 is welded to the outer shell 1 as a whole.

[0032] In another embodiment, combined Figure 1 and Figure 2 As shown, the topmost wave plate 2 is named the first plate 5, and the first plate 5 forms the top plate of the outer shell 1.

[0033] In another embodiment, combined Figure 1 and Figure 2 As shown, the first plate 5 has a concave bending portion 6 in the middle, and the two ends of the first plate 5 are respectively provided with fixing portions 7. The fixing portion 7 is a concave cylindrical body with internal threads inside. The bottom of the two fixing portions 7 are respectively kept between the corrugated plate 2 below. The fixing portion 7 is used to fix the flame retardant to the car battery pack bracket, and the fixing portion 7 also serves to narrow and bend the channel 4.

[0034] In another embodiment, the bottom corrugated plate 2 forms the base plate of the outer casing 1.

[0035] In another embodiment, each of the corrugated plates 2 located between the top plate and the bottom plate is provided with a plurality of staggered through holes, so as to make the flow direction of the fluid entering the housing 1 more complex and increase the probability of free radicals colliding with the wall of the channel 4.

[0036] In another embodiment, the foam metal block 3 is composed of a first foam metal block arranged horizontally and a second foam metal block arranged vertically, so as to reduce the difficulty of cutting and processing the foam metal block 3.

[0037] The first foam metal block is a nickel-plated foam iron block, and the second foam metal block is a foam nickel block; the first foam metal block and the second foam metal block can both be foam nickel blocks; the first foam metal block and the second foam metal block can also be other multi-layered high-temperature resistant foam metal blocks; thus, the foam metal block has the advantages of high fire-retardant thickness and good effect, and it is also conducive to reducing manufacturing difficulty and manufacturing cost.

[0038] In another embodiment, the end of the outer casing 1 is further provided with a retainer 8 for fixing the first foam metal block and the second foam metal block.

[0039] In another embodiment, the retainer 8 is integrally formed with the outer shell 1.

[0040] In another embodiment, the retainer 8 is provided with clamping blocks 9 corresponding to the first foam metal block and the second foam metal block respectively.

Claims

1. An integrated flame retardant for a new energy vehicle battery pack, characterized in that, It includes a housing (1), multiple corrugated plates (2) disposed inside the housing (1), and a foam metal block (3) disposed at one end of the housing (1); The outer shell (1) is a one-piece metal structure. Each of the corrugated plates (2) is set at the same height inside the outer shell (1). Each of the corrugated plates divides the interior of the outer shell (1) into multiple flat and bent channels (4). The foam metal block (3) is L-shaped, with the thicker end of the foam metal block (3) located at the lower end of the outer shell (1), and the thicker end of the foam metal block (3) protruding from the end of the outer shell (1).

2. The integrated flame retardant for a new energy vehicle battery pack as described in claim 1, characterized in that, Each of the aforementioned wave plates (2) is welded to the outer shell (1) as a whole.

3. The integrated flame retardant for a new energy vehicle battery pack as described in claim 2, characterized in that, The topmost wave plate (2) is named the first plate (5), which forms the top plate of the outer shell (1).

4. The integrated flame retardant for a new energy vehicle battery pack as described in claim 3, characterized in that, The first plate (5) has a concave bending part (6) in the middle and a fixing part (7) at both ends. The fixing part (7) is a concave cylinder with an internal thread inside. The bottom of the two fixing parts (7) are respectively kept between the corrugated plate (2) below.

5. The integrated flame retardant for a new energy vehicle battery pack as described in claim 4, characterized in that, The bottom corrugated plate (2) forms the base plate of the outer shell (1).

6. The integrated flame retardant for a new energy vehicle battery pack as described in claim 5, characterized in that, Each corrugated plate (2) located between the top plate and the bottom plate is also provided with multiple staggered through holes.

7. The integrated flame retardant for a new energy vehicle battery pack as described in claim 6, characterized in that, The foam metal block (3) consists of a first foam metal block arranged horizontally and a second foam metal block arranged vertically.

8. The integrated flame retardant for a new energy vehicle battery pack as described in claim 7, characterized in that, The end of the outer casing (1) is also provided with a retainer (8) for fixing the first foam metal block and the second foam metal block.

9. The integrated flame retardant for a new energy vehicle battery pack as described in claim 8, characterized in that, The retainer (8) and the outer shell (1) are integrally formed.

10. The integrated flame retardant for a new energy vehicle battery pack as described in claim 9, characterized in that, The retainer (8) is provided with clamping blocks (9) corresponding to the first foam metal block and the second foam metal block respectively.

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