Battery pack with fire protection function

Abstract

The utility model belongs to the technical field of energy storage battery, disclose battery pack with fire control function. Battery pack with fire control function including battery module, apron and solid fire control medium piece, apron cover is established on battery module, the side of apron is provided with accommodating groove away from battery module, the bottom wall of accommodating groove is provided with openwork structure, solid fire control medium piece places in accommodating groove, when battery module thermal runaway, solid fire control medium piece gasification eruption, cover on battery module through openwork structure, can rapidly to battery module carry out fire extinguishing, thereby effectively prevent fire risk. The battery pack with fire control function, through to apron make use of, design solid fire control medium piece's accommodating groove on apron and set up openwork structure on the bottom wall of accommodating groove, make solid fire control medium piece's installation mode by "hang " type, change for "seat " type, and do not increase the installation accessory, more enhanced solid fire control medium piece installation's reliability, enhanced the security of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, and in particular to a battery pack with fire protection function. Background Technology

[0002] With the continuous development of energy storage technology, air-cooled energy storage battery packs face the potential risk of thermal runaway in practical applications. To address this issue, fire suppression systems are usually installed to ensure a rapid and effective response in the event of thermal runaway of the battery module, preventing safety risks such as fires.

[0003] Conventional fire suppression systems use gaseous perfluorohexanone (PFH) liquefied under pressure and placed in fire cylinders. When the battery modules inside the battery pack experience thermal runaway, the fire suppression system erupts to extinguish the fire. However, fire cylinders occupy a large amount of space. To save space, solid PFH sheets are used, bonded to the inside of the battery pack cover with adhesive. These sheets naturally erupt at temperatures above 120°C or when exposed to an open flame. However, the adhesive weakens over time, causing the PFH sheets to detach.

[0004] Therefore, there is an urgent need for a battery pack with fire-fighting capabilities to solve the problems in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a battery pack with fire-fighting function, which enhances the reliability of solid fire-fighting media installation and improves the safety of the battery pack.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Battery packs with fire-fighting capabilities include:

[0008] Battery module;

[0009] A cover plate is placed on the battery module. The cover plate has a receiving groove on the side opposite to the battery module, and the bottom wall of the receiving groove has a hollow structure.

[0010] A solid fire-fighting medium sheet is placed in the receiving tank. When the battery module experiences thermal runaway, the solid fire-fighting medium sheet vaporizes and erupts, covering the battery module through the hollow structure.

[0011] Optionally, the hollow structure includes multiple through holes penetrating the bottom wall of the receiving groove.

[0012] Optionally, the battery module includes:

[0013] Fixed components;

[0014] Multiple battery cells are arranged sequentially in the fixing assembly along a horizontal direction;

[0015] The current collector is a combination assembly, and all of the battery cells are electrically connected to the current collector assembly.

[0016] Optionally, the bus assembly includes a busbar and welded aluminum bars, with two adjacent cells connected in series via the welded aluminum bars, and each welded aluminum bar is electrically connected to the busbar.

[0017] Optionally, the top of the battery cell is provided with an explosion-proof valve, and the busbar is provided with a first clearance hole corresponding to the position of the explosion-proof valve.

[0018] Optionally, the welding aluminum bar has a protrusion in the middle, and the protrusion abuts against the cover plate.

[0019] Optionally, the battery module further includes an insulating sheet disposed between the cover plate and the busbar. The insulating sheet has a second clearance hole corresponding to the position of the explosion-proof valve and a third clearance hole corresponding to the position of the protrusion.

[0020] Optionally, the busbar assembly further includes a positive electrode and a negative electrode, with the two ends of the busbar electrically connected to the positive electrode and the negative electrode, respectively.

[0021] Optionally, the fixing component includes a first profile, a second profile, and a steel strip, with a plurality of battery cells placed sequentially between the first profile and the second profile in a horizontal direction, and the steel strip wrapped around the outer periphery of the first profile, the second profile, and the plurality of battery cells.

[0022] Optionally, the solid fire-fighting medium sheet is a solid perfluoroacetone sheet.

[0023] Beneficial effects:

[0024] This utility model provides a battery pack with fire-fighting function, including a battery module, a cover plate, and a solid fire-fighting medium sheet. The cover plate is placed on the battery module, and a receiving groove is provided on the side of the cover plate away from the battery module. The bottom wall of the receiving groove has a hollow structure. The solid fire-fighting medium sheet is placed in the receiving groove. In the event of thermal runaway of the battery module, the solid fire-fighting medium sheet vaporizes and erupts, covering the battery module through the hollow structure, which can quickly extinguish the fire in the battery module, thereby effectively preventing fire risks. This battery pack with fire-fighting function utilizes the cover plate, designing a receiving groove for the solid fire-fighting medium sheet and setting a hollow structure on the bottom wall of the receiving groove. This changes the installation method of the solid fire-fighting medium sheet from "hanging" to "seat" without adding installation accessories, further enhancing the reliability of the solid fire-fighting medium sheet installation and improving the safety of the battery pack. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the battery pack with fire-fighting function provided by this utility model;

[0026] Figure 2 This is an exploded view of the battery pack with fire-fighting function provided by this utility model.

[0027] In the picture:

[0028] 100. Battery module; 110. Fixing assembly; 111. First profile; 112. Second profile; 113. Steel strip; 120. Battery cell; 121. Explosion-proof valve; 130. Busbar assembly; 131. Busbar; 1311. First clearance hole; 132. Welded aluminum bar; 1321. Protrusion; 140. Positive electrode sheet; 150. Negative electrode sheet;

[0029] 200. Cover plate; 210. Receiving groove; 211. Through hole;

[0030] 300. Solid fire-fighting medium tablets;

[0031] 400, Insulating sheet; 410, Second clearance hole; 420, Third clearance hole. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] This embodiment provides a battery pack with fire-fighting function, such as Figures 1-2 As shown, the battery pack with fire-fighting function includes a battery module 100, a cover plate 200, and a solid fire-fighting medium sheet 300. The cover plate 200 covers the battery module 100. The side of the cover plate 200 away from the battery module 100 has a receiving groove 210. The bottom wall of the receiving groove 210 has a hollow structure. The solid fire-fighting medium sheet 300 is placed in the receiving groove 210. When the battery module 100 experiences thermal runaway, the solid fire-fighting medium sheet 300 vaporizes and erupts, covering the battery module 100 through the hollow structure, which can quickly extinguish the fire in the battery module 100, thereby effectively preventing fire risks. This battery pack with fire protection function utilizes the cover plate 200, designing a receiving groove for the solid fire protection medium sheet 300 on the cover plate 200 and setting a hollow structure on the bottom wall of the receiving groove. This changes the installation method of the solid fire protection medium sheet 300 from "hanging" to "seat" without adding installation accessories, thus enhancing the reliability of the installation of the solid fire protection medium sheet 300 and improving the safety of the battery pack.

[0037] Optionally, the hollow structure includes multiple through holes 211 penetrating the bottom wall of the receiving groove 210. The through holes 211 can improve the diffusion effect after the solid fire-fighting medium sheet 300 is vaporized and ejected, so that the fire-fighting medium can cover the surface of the battery module 100 more evenly, which helps to control the fire source more quickly and enhance the fire extinguishing effect.

[0038] Optionally, the battery module 100 includes a fixing component 110, multiple battery cells 120, and a busbar component 130. The multiple battery cells 120 are sequentially placed horizontally within the fixing component 110, which secures them together as a single unit. All battery cells 120 are electrically connected to the busbar component 130. The presence of the fixing component 110 helps to firmly fix the multiple battery cells 120 together, forming a unified structure. This improves the structural stability of the battery module 100 and reduces the risk of loosening under vibration or external impact conditions. The sequential placement of the multiple battery cells 120 within the fixing component 110 along a horizontal direction helps to utilize space more effectively, especially for applications such as energy storage devices or electric vehicles. The simultaneous connection of the multiple battery cells 120 to the busbar component 130 allows for the combining of current and voltage from the multiple cells 120, enabling the battery module 100 to provide greater output power and meet the high power demands of electrical appliances.

[0039] Optionally, the busbar assembly 130 includes a busbar 131 and welded aluminum bars 132. Two adjacent battery cells 120 are connected in series via welded aluminum bars 132, and each welded aluminum bar 132 is electrically connected to the busbar 131. This connection method of the busbar assembly 130 helps to improve the heat dissipation of the battery module 100, reduce temperature rise, and increase system safety.

[0040] Optionally, the top of the battery cell 120 is equipped with an explosion-proof valve 121, and the manifold 131 has a first clearance hole 1311 corresponding to the position of the explosion-proof valve 121. The explosion-proof valve 121 is designed to rupture when the internal pressure of the battery rises to a dangerous level, releasing the pressure inside the battery cell 120 and preventing the battery cell 120 from exploding. The first clearance hole 1311 helps the vaporized fire-fighting medium to quickly cover the battery cell 120, improving the fire-fighting effect and speed.

[0041] Optionally, to ensure the structural strength of the cover plate 200, and considering that the solid fire-fighting medium 300 has a certain coverage area after vaporization and ejection, in this embodiment, only a receiving groove 210 is opened in the middle of the cover plate 200. The through hole 211, the first clearance hole 1311, and the explosion-proof valve 121 on the bottom wall of the receiving groove 210 are arranged opposite each other, which can improve the fire extinguishing effect and fire extinguishing speed. In other embodiments, the length of the receiving groove 210 can be adapted to the actual fire extinguishing needs. In this embodiment, the length of the receiving groove 210 is not specifically limited.

[0042] Optionally, such as Figure 2As shown, the welded aluminum bar 132 has a protrusion 1321 in the middle, which abuts against the cover plate 200, ensuring a gap between the cover plate 200 and the battery module 100. After the solid fire-fighting medium 300 is vaporized and ejected, it fills the gap, isolating air and oxygen, thus achieving a fire extinguishing effect. Furthermore, the protrusion 1321 eliminates the stress caused by thermal expansion and contraction between two adjacent battery cells 120, improving the safety of the battery module 100.

[0043] Optionally, the battery module 100 also includes an insulating sheet 400, which is disposed between the cover plate 200 and the busbar 131. The insulating sheet 400 has a second clearance hole 410 corresponding to the position of the explosion-proof valve 121, and a third clearance hole 420 corresponding to the position of the protrusion 1321. Due to the presence of the insulating sheet 400, the overall insulation performance of the battery module 100 is improved, reducing the risk of electric shock and short circuit. The second clearance hole 410 on the insulating sheet 400, corresponding to the position of the explosion-proof valve 121, allows the solid fire-fighting medium sheet 300 to vaporize and erupt after thermal runaway of the battery cell 120, directly reaching the fire source and improving the fire-fighting effect. The third clearance hole 420 ensures that the insulating sheet 400 adheres to the busbar assembly 130, improving the insulation effect and further enhancing the safety of the battery module 100.

[0044] Optionally, the busbar assembly 130 also includes a positive electrode 140 and a negative electrode 150, with the two ends of the busbar 131 electrically connected to the positive electrode 140 and the negative electrode 150, respectively. Connecting the two ends of the busbar 131 to the positive electrode 140 and the negative electrode 150 simplifies the connection structure of the battery module 100, making the assembly and maintenance of the battery module 100 more convenient.

[0045] Optionally, such as Figure 2 As shown, the fixing assembly 110 includes a first profile 111, a second profile 112, and a steel strip 113. Multiple battery cells 120 are sequentially placed horizontally between the first profile 111 and the second profile 112. The steel strip 113 is wound around the outer periphery of the first profile 111, the second profile 112, and the multiple battery cells 120. The design of the first profile 111, the second profile 112, and the steel strip 113 helps ensure that the multiple battery cells 120 are arranged orderly and stably in the horizontal direction, helps maintain the position of the battery cells 120, and improves the structural stability of the entire battery module 100.

[0046] Optionally, the fixing assembly 110 further includes a first fixing member and a second fixing member. The first fixing member is inserted into the first profile 111, and the second profile 112 is inserted into the second profile 112. The positive electrode 140 is fixed on the first fixing member, and the negative electrode 150 is fixed on the second fixing member, thereby ensuring that the positions of the positive electrode 140 and the negative electrode 150 are stable when the battery module 100 is working.

[0047] Optionally, the solid fire-fighting medium 300 is a solid perfluoroacetone sheet. Solid perfluoroacetone sheets have good fire-extinguishing performance and can be rapidly vaporized and ejected when the battery module 100 experiences thermal runaway. This helps to extinguish fires quickly, prevent fire risks, and does not affect the normal use of other battery cells 120 in the battery module 100 that have not experienced thermal runaway after the fire is extinguished.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery pack having a fire fighting function, characterized by, include: Battery module (100); A cover plate (200) is provided on the battery module (100). The cover plate (200) has a receiving groove (210) on the side away from the battery module (100). The bottom wall of the receiving groove (210) has a hollow structure. A solid fire-fighting medium sheet (300) is placed in the receiving groove (210). When the battery module (100) experiences thermal runaway, the solid fire-fighting medium sheet (300) vaporizes and erupts, covering the battery module (100) through the hollow structure.

2. The battery pack having a fire extinguishing function according to claim 1, characterized by, The hollow structure includes multiple through holes (211) penetrating the bottom wall of the receiving groove (210). 3.The battery pack with a fire extinguishing function according to claim 1, wherein The battery module (100) includes: Fixed component (110); Multiple battery cells (120) are arranged sequentially in the fixing assembly (110) along a horizontal direction; The busbar assembly (130) is electrically connected to the plurality of said cells (120).

4. The battery pack with fire-fighting function according to claim 3, characterized in that, The bus assembly (130) includes a busbar (131) and a welded aluminum bar (132). Two adjacent cells (120) are connected in series through the welded aluminum bar (132), and each welded aluminum bar (132) is electrically connected to the busbar (131).

5. The battery pack with a fire extinguishing function according to claim 4, characterized by, The top of the battery cell (120) is provided with an explosion-proof valve (121), and the busbar (131) is provided with a first clearance hole (1311) corresponding to the position of the explosion-proof valve (121).

6. The battery pack with a fire extinguishing function according to claim 5, characterized by, The welding aluminum bar (132) has a protrusion (1321) in the middle, and the protrusion (1321) abuts against the cover plate (200).

7. The battery pack with a fire extinguishing function according to claim 6, characterized by, The battery module (100) also includes an insulating sheet (400), which is disposed between the cover plate (200) and the busbar (131). The insulating sheet (400) has a second clearance hole (410) corresponding to the position of the explosion-proof valve (121), and the insulating sheet (400) has a third clearance hole (420) corresponding to the position of the protrusion (1321).

8. The battery pack with a fire extinguishing function according to claim 4, characterized by, The busbar assembly (130) further includes a positive electrode (140) and a negative electrode (150), and the two ends of the busbar (131) are electrically connected to the positive electrode (140) and the negative electrode (150), respectively.

9. The battery pack with fire-fighting function according to claim 8, characterized in that, The fixing component (110) includes a first profile (111), a second profile (112), and a steel strip (113). A plurality of battery cells (120) are placed sequentially between the first profile (111) and the second profile (112) in a horizontal direction. The steel strip (113) is wound around the outer periphery of the first profile (111), the second profile (112), and the plurality of battery cells (120).

10. The battery pack with fire fighting function according to any one of claims 1-9, characterized in that, The solid fire-fighting medium sheet (300) is a solid perfluoroacetone sheet.

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