A battery pack structure

Abstract

This utility model discloses a battery pack structure, including: multiple batteries, each battery having a pressure relief valve; a flue gas duct; a smoke exhaust mechanism connected to the flue gas duct; multiple one-way smoke exhaust components on the flue gas duct, the number of which is equal to the number of pressure relief valves and their positions correspond, each one-way smoke exhaust component being connected to the flue gas duct; a detector disposed inside the flue gas duct or the smoke exhaust mechanism; multiple through holes on the flue gas duct, the number of which is equal to the number of one-way smoke exhaust components and their positions correspond, each through hole being connected to a corresponding one-way smoke exhaust component; this utility model achieves rapid pressure relief by timely guiding gas out, thus preventing further battery runaway.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically to a battery pack structure. Background Technology

[0002] When a battery pack experiences thermal runaway, it generates a large amount of high-temperature, high-pressure gas in a very short time. Traditional battery packs suffer from low pressure relief efficiency and rely mainly on fixed heat dissipation holes pre-drilled in the casing for pressure relief. These holes are small in diameter and few in number, and the gas discharge rate is much lower than the generation rate, which can easily lead to casing rupture. In addition, gas can randomly escape from gaps or heat dissipation holes in the casing, and the high-temperature gas can easily directly impact surrounding equipment or personnel, which can cause secondary accidents. Utility Model Content

[0003] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a battery pack structure that facilitates timely pressure relief and gas discharge.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a battery pack structure, including batteries, having multiple batteries, each battery being provided with a pressure relief valve; further including: a flue gas duct; a smoke exhaust mechanism connected to the flue gas duct; and a unidirectional smoke exhaust component, having multiple unidirectional smoke exhaust components on the flue gas duct, the number of unidirectional smoke exhaust components being equal to the number of pressure relief valves and their positions corresponding, each unidirectional smoke exhaust component being connected to the flue gas duct.

[0005] Furthermore, it also includes detectors, which are installed inside flue gas ducts or smoke exhaust mechanisms.

[0006] Furthermore, the flue gas duct is provided with multiple through holes, the number of which is equal to the number of unidirectional smoke exhaust components and their positions correspond, and each through hole is connected to the corresponding unidirectional smoke exhaust component.

[0007] Furthermore, the smoke exhaust mechanism includes: a smoke exhaust pipe, which is connected to a flue gas duct; and a smoke exhaust assembly, which is installed inside the smoke exhaust pipe.

[0008] Furthermore, the smoke exhaust mechanism also includes a smoke exhaust fireproof check valve, which is installed inside the smoke exhaust pipe and located between the smoke exhaust assembly and the smoke duct.

[0009] Furthermore, the end of the exhaust pipe furthest from the flue gas duct is connected to a connecting pipe.

[0010] Furthermore, it also includes: a fixed base that supports the smoke exhaust mechanism; and a support base that supports the flue gas duct, with the fixed base mounted on the support base.

[0011] Furthermore, the support base is provided with mounting holes.

[0012] The beneficial effects of this utility model are as follows: when the battery experiences thermal runaway, the gas ejected from the pressure relief valve impacts the one-way smoke exhaust component, which, together with the smoke exhaust assembly, guides the gas inside the smoke duct to be discharged in a timely manner, helping to prevent further runaway and deterioration of the battery; at the same time, by setting up the one-way smoke exhaust component, the gas can only flow in one direction, preventing backflow of gas inside the smoke duct; and the smoke exhaust fireproof check valve also achieves the functions of fire prevention and preventing backflow of smoke. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the installation of the smoke exhaust assembly, flue gas duct, and connecting pipe of this utility model.

[0016] Figure 3 This is a schematic diagram of the flue gas duct structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the flue gas duct structure of this utility model.

[0018] Figure 5 This is a schematic diagram of the installation of the flue gas duct and exhaust pipe of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Battery; 11. Pressure relief valve; 2. Smoke duct; 21. Through hole; 3. One-way smoke exhaust component; 4. Smoke exhaust mechanism; 41. Smoke exhaust pipe; 42. Smoke exhaust assembly; 43. Smoke exhaust fireproof check valve; 5. Connecting pipe; 6. Fixing base; 7. Support base; 71. Mounting hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1 like Figures 1 to 4As shown, this utility model provides a battery pack structure, including multiple batteries 1, each battery 1 being equipped with a pressure relief valve 11; as Figure 1 As shown, in one arrangement of the battery 1, two rows of batteries 1 are arranged, with multiple batteries 1 evenly distributed in a straight line in each row; a flue gas duct 2 is arranged between the two rows of batteries 1, and a smoke exhaust mechanism 4 is connected to the flue gas duct 2.

[0022] The smoke exhaust mechanism 4 includes a smoke exhaust pipe 41, which is connected to one end of the flue gas duct 2, and the other end of the flue gas duct 2 is closed. The smoke exhaust mechanism 4 also includes a smoke exhaust component 42, which is installed inside the smoke exhaust pipe 41. The smoke exhaust component 42 can be a mechanism such as an air pump or a fan to guide the airflow.

[0023] Multiple one-way exhaust components 3 are fixedly installed on the flue gas duct 2. The number of one-way exhaust components 3 is equal to that of the battery 1 and their positions correspond. Each one-way exhaust component 3 is connected to the flue gas duct 2.

[0024] The one-way smoke exhaust component 3 can adopt a smoke exhaust check valve structure, and part of its structure can be made of mica material to achieve the effect of heat insulation and high temperature resistance. When the battery 1 is out of control, the pressure relief valve 11 can be opened when the internal pressure of the battery 1 exceeds the threshold, thereby venting high temperature and high pressure gas. The gas is directed towards the one-way smoke exhaust component 3, impacting the valve plate of the one-way smoke exhaust component 3 to open, and thus introducing gas into the one-way smoke exhaust component 3.

[0025] Multiple through holes 21 are provided on the flue gas duct 2, and the through holes 21 are connected to the inside of the flue gas duct 2. The number of through holes 21 is equal to the number of one-way exhaust components 3 and their positions correspond. Each one-way exhaust component 3 is connected to the corresponding through hole 21. When gas is introduced into the one-way exhaust component 3, it can be discharged into the inside of the flue gas duct 2. Through the exhaust component 42, the gas inside the flue gas duct 2 can be guided to the exhaust pipe 41.

[0026] A detector for detecting gas is installed inside the flue gas duct 2 or inside the exhaust pipe 41. The detector uses a flue gas sensor, such as CO or H2, to promptly determine if the battery 1 has experienced thermal runaway. When the battery 1 experiences thermal runaway, the exhaust assembly 42 immediately operates and promptly guides the gas inside the flue gas duct 2 to be discharged. When the detector is installed inside the exhaust pipe 41, the detector is located between the exhaust assembly 42 and the flue gas duct 2.

[0027] A smoke exhaust fireproof check valve 43 is installed inside the smoke exhaust pipe 41. The smoke exhaust fireproof check valve 43 is located between the smoke exhaust assembly 42 and the smoke duct 2. By installing the smoke exhaust fireproof check valve 43, it plays the role of fire prevention, preventing backflow of smoke, and preventing external water vapor from entering the smoke duct 2.

[0028] This battery pack structure can be used in energy storage equipment such as energy storage cabinets. When the battery 1 experiences thermal runaway, gas is injected from the pressure relief valve 11 and directed toward the one-way exhaust component 3. The gas enters the flue gas duct 2 through the one-way exhaust component 3 and the through hole 21. The gas inside the flue gas duct 2 flows into the exhaust pipe 41. The gas is detected in time by the detector, and the exhaust component 42 works to guide the gas out in time, thereby preventing the battery pack from further runaway and deterioration.

[0029] At the same time, the one-way exhaust component 3 ensures that the gas can only flow in one direction, thus preventing backflow of gas inside the flue gas duct 2.

[0030] Example 2 like Figure 1 and Figure 2 As shown, this embodiment is based on embodiment one, and further includes a connecting pipe 5. The connecting pipe 5 is connected to the end of the exhaust pipe 41 away from the flue gas pipe 2. A flange structure is provided on the connecting pipe 5, so that the connecting pipe 5 can be connected to pipes and other structures to further guide and discharge the gas.

[0031] Example 3 like Figure 2 and Figure 5 As shown, this embodiment is based on embodiment two. A fixing seat 6 is provided at the bottom of the exhaust pipe 41. The fixing seat 6 is fixedly connected to the exhaust pipe 41 and is used to support the exhaust pipe 41. At the same time, a support seat 7 is provided below the flue gas pipe 2. The flue gas pipe 2 is placed on the support seat 7, and the fixing seat 6 is also placed on the support seat 7.

[0032] Multiple mounting holes 71 are provided on the support base 7, which facilitate the installation and fixing of the support base 7, thereby fixing the flue gas duct 2, the smoke exhaust mechanism 4, etc. The support base 7 is used to fix the energy storage equipment such as the energy storage cabinet, and the battery 1 is also fixed to the energy storage equipment such as the energy storage cabinet through the bracket structure or the connecting structure.

[0033] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A battery pack structure comprising batteries (1), wherein multiple batteries (1) are provided, and each battery (1) is provided with a pressure relief valve (11); characterized in that, Also includes: Flue gas duct (2); Smoke exhaust mechanism (4), smoke exhaust mechanism (4) is connected to flue gas duct (2); One-way smoke exhaust component (3) is provided on the flue gas duct (2). The number of one-way smoke exhaust components (3) is equal to that of the pressure relief valve (11) and their positions correspond. Each one-way smoke exhaust component (3) is connected to the flue gas duct (2).

2. The battery pack structure as described in claim 1, characterized in that, It also includes a detector, which is installed inside the flue gas duct (2) or the exhaust mechanism (4).

3. The battery pack structure as described in claim 1, characterized in that, The flue gas duct (2) is provided with multiple through holes (21). The number of through holes (21) is equal to the number of unidirectional smoke exhaust components (3) and their positions correspond. Each through hole (21) is connected to the corresponding unidirectional smoke exhaust component (3).

4. The battery pack structure as described in claim 1, characterized in that, The smoke extraction mechanism (4) includes: Smoke exhaust pipe (41), smoke exhaust pipe (41) is connected to flue gas pipe (2); Smoke exhaust assembly (42) is installed inside smoke exhaust pipe (41).

5. A battery pack structure as described in claim 4, characterized in that, The smoke exhaust mechanism (4) also includes a smoke exhaust fireproof check valve (43), which is installed inside the smoke exhaust pipe (41) and is located between the smoke exhaust assembly (42) and the smoke duct (2).

6. A battery pack structure as described in claim 4, characterized in that, The end of the exhaust pipe (41) away from the flue gas pipe (2) is connected to the connecting pipe (5).

7. A battery pack structure as described in claim 1, characterized in that, Also includes: Fixed seat (6), fixed seat (6) supports smoke exhaust mechanism (4); Support base (7) supports flue gas duct (2), and fixed base (6) is set on support base (7).

8. A battery pack structure as described in claim 7, characterized in that, The support base (7) is provided with mounting holes (71).

Images