Smoke exhaust structure, battery pack and energy storage device

Abstract

The application relates to a smoke exhaust structure, a battery pack and an energy storage device, and belongs to the technical field of smoke exhaust. The smoke exhaust structure is arranged between two adjacent battery modules. The smoke exhaust structure comprises a first exhaust flue, a second exhaust flue and an elastic piece. A first through hole is formed in one side of the first exhaust flue in a second direction. The first through hole is in communication with the inner cavity of the first exhaust flue. The second exhaust flue is arranged at intervals with the first exhaust flue in the second direction. The first through hole is located on the side of the first exhaust flue away from the second exhaust flue. A second through hole is arranged on the side of the first exhaust flue away from the second exhaust flue. The second through hole is in communication with the inner cavity of the second exhaust flue. The elastic piece is connected between the first exhaust flue and the second exhaust flue. The application improves the sealing performance between the first exhaust flue and the second exhaust flue and the battery module, and further improves the safety and reliability of the whole battery pack.

Description

Technical Field

[0001] This application relates to the field of smoke extraction technology, and in particular to a smoke extraction structure, a battery pack, and an energy storage device. Background Technology

[0002] The explosion relief valve of the battery cell module and the exhaust duct arranged on the side of the battery cell module need to be sealed. The commonly used sealing element is a seal. The purpose is to ensure that the flue gas can be discharged in a direction through the exhaust duct, while avoiding corrosion or safety hazards to the surrounding electrical components and structural parts.

[0003] However, when the pressure relief valve is activated to release pressure due to a sudden increase in the internal pressure of the battery module, a high-speed, high-pressure airflow (which may be accompanied by high temperature, flame, or corrosive media) will be generated. After the pressure is released, the sealing performance of the seal may fail. Utility Model Content

[0004] The smoke exhaust structure provided in this application aims to solve the technical problem that the sealing performance of the seal is prone to failure after pressure relief; another objective of this application is to provide a battery pack, and yet another objective of this application is to provide an energy storage device.

[0005] To achieve the above objectives, according to a first aspect of this application, a smoke exhaust structure is provided, comprising: The first exhaust flue has a first through hole on one side in the second direction, and the first through hole communicates with the inner cavity of the first exhaust flue. The second exhaust flue is spaced apart from the first exhaust flue in the second direction, and the first through hole is located on the side of the first exhaust flue away from the second exhaust flue; the first exhaust flue is provided with a second through hole on the side of the first exhaust flue away from the second exhaust flue, and the second through hole communicates with the inner cavity of the second exhaust flue; An elastic element is connected between the first exhaust flue and the second exhaust flue.

[0006] Optionally, the first exhaust flue has a first exhaust port at each of its two ends in the first direction, and the first exhaust port, the inner cavity of the first exhaust flue, and the first through hole are interconnected. The second exhaust flue has a second exhaust port at each end in the first direction, and the second exhaust port, the inner cavity of the second exhaust flue, and the second through hole are interconnected. The first direction and the second direction intersect each other.

[0007] Optionally, a sealing assembly is provided, wherein the sealing assembly is provided on both the side of the first exhaust flue with the first through hole and the side of the second exhaust flue with the second through hole; The sealing assembly has a third through hole, which communicates with either the first through hole or the second through hole.

[0008] Optionally, the sealing assembly includes a plurality of first sealing portions spaced apart along a first direction, and each of the first sealing portions is provided with the third through hole; Each of the first through holes and each of the second through holes is surrounded by a first sealing portion.

[0009] Optionally, the sealing assembly includes a second sealing portion, which is in contact with the side of the first exhaust duct away from the elastic member or the side of the second exhaust duct away from the elastic member; The second sealing part is provided with a plurality of third through holes, each of which is provided in correspondence with a first through hole or a second through hole.

[0010] Optionally, a plurality of elastic elements are provided at intervals along the first direction between the first exhaust duct and the second exhaust duct.

[0011] Optionally, the elastic element is positioned corresponding to the first through hole or the second through hole.

[0012] Optionally, grooves are formed on the opposite sides of the first and second exhaust ducts, and the two ends of the elastic member are respectively accommodated in one of the grooves.

[0013] According to a second aspect of this application, a battery pack is provided, comprising: A first battery module and a second battery module spaced apart from each other, wherein the first battery module includes a first explosion-proof valve disposed toward the second battery module, and the second battery module includes a second explosion-proof valve disposed toward the first battery module; The smoke exhaust structure as described in any of the above claims is disposed between the first battery module and the second battery module, wherein the first through hole of the smoke exhaust structure faces the first explosion-proof valve, and the second through hole of the smoke exhaust structure faces the second explosion-proof valve; The elastic element of the exhaust structure applies pressure to the first exhaust duct and the second exhaust duct, respectively.

[0014] According to a third aspect of this application, an energy storage device is provided, including the battery pack described above.

[0015] The exhaust structure of this application embodiment is disposed between two adjacent battery modules. The exhaust structure includes a first exhaust duct, a second exhaust duct, and an elastic element. The first exhaust duct has a first through hole on one side in a second direction, which communicates with the inner cavity of the first exhaust duct. The second exhaust duct is spaced apart from the first exhaust duct in the second direction, and the first through hole is located on the side of the first exhaust duct away from the second exhaust duct. The first exhaust duct has a second through hole on the side away from the second exhaust duct, which communicates with the inner cavity of the second exhaust duct. The elastic element connects the first exhaust duct and the second exhaust duct. Through the above technical solution, the elastic element in this application can provide a certain buffer for the first exhaust duct and the second exhaust duct, effectively dealing with the impact force that may be generated during the initial depressurization of the battery cell and subsequent processes, reducing the risk of damage to the first exhaust duct and the second exhaust duct due to force. At the same time, through the elastic action of the elastic element, it can also ensure that the sealing performance of the sealing components at the connection between the first exhaust duct and the second exhaust duct and the corresponding battery module does not fail, solving the problem that the sealing performance of the sealing components is prone to failure after depressurization.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 This is an exploded schematic diagram of the smoke exhaust structure disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the overall structure of the first exhaust flue disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of the overall structure of the second exhaust flue disclosed in the embodiments of this application; Figure 4 This is a schematic diagram of the positional installation of a sealing component disclosed in an embodiment of this application; Figure 5 This is a schematic diagram showing the position and installation of another sealing component disclosed in an embodiment of this application; Figure 6 This is a schematic diagram of the overall structure of the battery pack disclosed in the embodiments of this application; Figure 7 This is a schematic diagram of the structure of the first battery module disclosed in the embodiments of this application from one angle; Figure 8 This is a schematic diagram of the first battery module disclosed in the embodiments of this application from another angle; Figure 9 This is a schematic diagram of the structure of the second battery module disclosed in the embodiments of this application from one angle; Figure 10 This is a schematic diagram of the second battery module disclosed in the embodiments of this application from another angle; Figure 11 This is a schematic diagram showing the installation position of the fastener on the first battery module as disclosed in the embodiments of this application; Figure 12 This is a schematic diagram showing the installation position of the fastener on the second battery module as disclosed in the embodiments of this application; Figure 13 This is a schematic diagram of the force applied to the elastic element disclosed in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures: X - First direction; Y - Second direction; 100 - First battery module; 110 - First explosion-proof valve; 120 - First battery cell; 130 - First terminal post; 140 - First end plate; 150 - First connector; 200 - Second battery module; 210 - Second explosion-proof valve; 220 - Second battery cell; 230 - Second terminal post; 240 - Second end plate; 250 - Second connector; 300 - First exhaust flue; 310 - First through hole; 320 - First exhaust port; 400 - Second exhaust flue; 410 - Second through hole; 420 - Second exhaust port; 500 - Elastic component; 600 - Sealing assembly; 610 - Third through hole; 620 - First sealing part; 630 - Second sealing part; 700 - Fastener; 800-base support; 900 - Groove. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0023] In the accompanying drawings of the embodiments of this application, an arrow labeled X indicates a first direction, and an arrow labeled Y indicates a second direction. The description of this application introduces the first and second directions to more clearly illustrate the structure and relative positional relationships of the components in the battery pack. In practical applications, the first and second directions can point to any direction in space. The first direction is the width direction of the battery pack, which is also the direction in which the individual battery cells in the battery module are arranged; the second direction is the direction in which two battery modules in the battery pack are arranged. Optionally, the first and second directions are perpendicular to each other.

[0024] When a battery cell module is in operation, a violent reaction occurs inside the cell once the explosion relief valve opens, releasing a large amount of smoke. If this smoke is not discharged in time, it will accumulate in a confined space, severely polluting the surrounding environment and potentially causing serious disruption to the normal operation of the battery cell module and other equipment due to the continuously increasing pressure, even leading to more serious safety accidents. To address this issue, smoke exhaust channels are installed to promptly disperse these hazardous smokes and create a safe and stable operating environment for the equipment.

[0025] However, existing exhaust channels rely solely on high-temperature resistant sealant and flame-retardant gaskets to seal the connection between the exhaust duct and the cell's pressure relief valve. However, the powerful impact and high-temperature environment generated by the internal reaction within the cell during the moment the pressure relief valve opens and in the following minutes can severely damage the sealant and gaskets. Furthermore, the unique assembly method of some battery modules leaves no space for mechanical fixation, making it impossible to strengthen the sealing structure by adding mechanical fixation methods. This further reduces the stability and reliability of the seal.

[0026] Due to the factors mentioned above, the seal between the existing flue gas passage and the explosion-proof valve is highly susceptible to failure. The impact force when the explosion-proof valve opens may cause the sealant and gasket to shift, deform, or be damaged, disrupting the sealing structure and leading to flue gas leakage. High temperatures alter the properties of the sealant and gasket; for example, the sealant softens and flows, while the gasket shrinks and becomes brittle, rendering it unable to effectively fill gaps. Furthermore, the lack of mechanical fastening makes the sealing structure, relying solely on sealant and gaskets, more prone to loosening and separation under the combined effects of impact and high temperature, significantly increasing the likelihood of seal failure.

[0027] According to the first aspect of this application, referring to Figure 1 , Figure 2 and Figure 3 This embodiment provides a smoke exhaust structure disposed between two adjacent battery modules. The smoke exhaust structure includes a first exhaust duct 300, a second exhaust duct 400, and an elastic member 500. The first exhaust duct 300 has a first through hole 310 on one side in the second direction Y, which communicates with the inner cavity of the first exhaust duct 300. The second exhaust duct 400 is spaced apart from the first exhaust duct 300 in the second direction Y. The first through hole 310 is located on the side of the first exhaust duct 300 away from the second exhaust duct 400. The first exhaust duct 300 has a second through hole 410 on the side facing away from the second exhaust duct 400, which communicates with the inner cavity of the second exhaust duct 400. The elastic member 500 connects the first exhaust duct 300 and the second exhaust duct 400. Specifically, the flue gas inside the battery cell can enter the inner cavity of the first exhaust flue 300 through the first through hole 310, or enter the inner cavity of the second exhaust flue 400 through the second through hole 410.

[0028] It should be noted that the elastic element 500 can be a spring, a rebound sheet metal spring, or a rotational contraction or extension transmission mechanism. The spring, with its excellent elastic deformation capability, can provide a stable and continuous compressive force between the first exhaust duct 300 and the second exhaust duct 400. When the battery cell begins to depressurize, the spring can quickly buffer the strong impact force, effectively reducing the impact on the ducts, while continuously maintaining the compressive force on the first exhaust duct 300 and the second exhaust duct 400, ensuring the sealing between the first exhaust duct 300 and the second exhaust duct 400 and the battery module, respectively. A rebound sheet metal spring is also a viable option for the elastic element 500. Sheet metal springs have high strength and good resilience, and can be flexibly arranged in a limited space. When the battery cell begins to depressurize, the sheet metal spring can absorb energy through its own elastic deformation and quickly rebound after the impact, restoring the compressive force on the first exhaust duct 300 and the second exhaust duct 400, ensuring the structural stability and sealing of the battery pack under complex operating conditions. Furthermore, the rotating retraction or extension transmission mechanism can also serve as an elastic element 500. This transmission mechanism can automatically adjust its own extension and contraction state according to changes in the external force acting on the flue. Under the action of impact force, the transmission mechanism retracts to buffer the impact, and after the impact force weakens, it can extend back to its initial state, continuously providing compression force to the flue, thereby ensuring the stable operation of the battery pack at different working stages.

[0029] It should be noted that both the first exhaust duct 300 and the second exhaust duct 400 can be made of flame-retardant and heat-insulating high-temperature resistant materials. These materials possess excellent high-temperature resistance, capable of withstanding the high-temperature impact generated during the instantaneous explosion of the battery cell, effectively preventing heat transfer and preventing deformation and damage to the duct due to high temperatures. Simultaneously, their flame-retardant properties prevent combustion in high-temperature environments, further ensuring the safety of the battery pack. For example, some high-performance ceramic fiber composite materials are often used in the manufacture of such ducts. Alternatively, flame-retardant and heat-insulating high-temperature resistant coatings can be sprayed onto the inner surface of conventional engineering plastics to prepare the ducts (i.e., the first exhaust duct 300 and the second exhaust duct 400). This method utilizes the good formability and certain mechanical properties of conventional engineering plastics while imparting excellent flame-retardant and heat-insulating properties to the ducts through the spraying of high-temperature resistant coatings. The special components in the coating can form a stable heat insulation barrier at high temperatures, blocking heat transfer to the duct body and preventing flame spread, ensuring the reliability of the ducts under complex operating conditions. Alternatively, sheet metal flues can be used. Sheet metal materials have high strength and good processing performance, which can meet the structural strength requirements of the flues (i.e., the first exhaust flue 300 and the second exhaust flue 400). To meet the voltage resistance requirements of the battery module, the flues (i.e., the first exhaust flue 300 and the second exhaust flue 400) can be coated with insulating powder. The insulating powder forms an insulating protective layer on the surface of the sheet metal flue, effectively avoiding safety hazards caused by electrical short circuits and other problems, and ensuring the stability of the battery pack in terms of electrical performance.

[0030] Through the above technical solution, the elastic element 500 in this embodiment can provide a certain buffer for the first exhaust flue 300 and the second exhaust flue 400, effectively dealing with the impact force that may be generated during the initial depressurization of the battery cell and subsequent processes, reducing the risk of damage to the first exhaust flue 300 and the second exhaust flue 400 due to force; at the same time, through the elastic effect of the elastic element 500, it can also ensure that the sealing performance of the sealing component 600 at the connection between the first exhaust flue 300 and the second exhaust flue 400 and the corresponding battery module does not fail, solving the problem that the sealing performance of the sealing component 600 is prone to failure after depressurization.

[0031] Specifically, in this embodiment, the elastic element 500 is disposed between the first exhaust duct 300 and the second exhaust duct 400. Due to its elastic properties, it can apply a continuous and stable compressive force to the first exhaust duct 300 and the second exhaust duct 400. When the battery pack is in normal operation, the compressive force provided by the elastic element 500 can cause the first exhaust duct 300 to fit tightly against its adjacent battery module, and the second exhaust duct 400 to fit tightly against its adjacent battery module. This greatly reduces the gaps between the first exhaust duct 300 and the battery module, and between the second exhaust duct 400 and the battery module, effectively ensuring sealing, preventing outside air from entering, and avoiding potential risks of flue gas leakage. When the battery cell begins to depressurize, the strong impact force generated inside the cell will impact the first exhaust duct 300 and the second exhaust duct 400. At this time, the elastic element 500 can buffer the impact force, preventing the impact force from acting directly on the connection between the duct and the battery module. During the buffering process, the elastic element 500 will deform to a certain extent, but at the same time, it will continue to maintain the compressive force on the flues (i.e., the first exhaust flue 300 and the second exhaust flue 400), ensuring that the sealing components 600 between the first exhaust flue 300 and the battery module, and between the second exhaust flue 400 and the battery module, do not fail. Even under the action of impact force, the first exhaust flue 300 and the second exhaust flue 400 may experience slight displacement, and the elastic element 500 can adjust the position of the first exhaust flue 300 and the second exhaust flue 400 in a timely manner through its own elastic restoring force, maintaining good sealing performance.

[0032] In some embodiments, such as Figure 1As shown, the first exhaust duct 300 has first exhaust ports 320 at both ends in the first direction X. The first exhaust ports 320, the inner cavity of the first exhaust duct 300, and the first through hole 310 are connected. Specifically, when a large amount of flue gas is generated by the depressurization of a battery cell near the first exhaust duct 300, it will first enter the first exhaust duct 300 through the first through hole 310. Subsequently, this flue gas will flow quickly and smoothly along the inner cavity of the first exhaust duct 300 to the first exhaust port 320 and be discharged from the first exhaust port 320. The first exhaust port 320 provides a direct and efficient outlet for the flue gas accumulated in the first exhaust duct 300, ensuring that hazardous flue gas can be quickly discharged to the outside of the battery pack, effectively avoiding a series of potential problems that may be caused by the accumulation of flue gas in the first exhaust duct 300, and further ensuring the safety and stability of the battery pack operating environment.

[0033] In addition, the second exhaust duct 400 has second exhaust ports 420 at both ends in the first direction X, and the second exhaust ports 420, the inner cavity of the second exhaust duct 400, and the second through hole 410 are connected. Specifically, when a large amount of flue gas generated by the depressurization of a battery cell near the second exhaust duct 400 is released, it will quickly flow into the second exhaust duct 400 through the second through hole 410. Then, this flue gas will flow quickly and smoothly along the inner cavity of the second exhaust duct 400 to the second exhaust port 420 and be discharged from the second exhaust port 420. The second exhaust port 420 provides a direct and efficient exhaust outlet for the flue gas accumulated in the second exhaust duct 400, ensuring that hazardous flue gas can be quickly discharged to the outside of the battery pack, effectively avoiding a series of potential problems that may be caused by the accumulation of flue gas in the second exhaust duct 400, and further ensuring the safety and stability of the battery pack operating environment. This design ensures the timely and smooth dispersal of hazardous fumes, effectively preventing potential safety hazards caused by stagnant fumes and providing strong support for the safe and stable operation of the battery pack. The first exhaust duct 300 and the second exhaust duct 400 work together to enhance the battery pack's ability to handle fumes emissions when the cell modules malfunction.

[0034] In some embodiments, such as Figure 1As shown, sealing components 600 are provided on both the side of the first exhaust duct 300 away from the elastic member 500 and the side of the second exhaust duct 400 away from the elastic member 500. Specifically, a sealing component 600 is provided on the side of the first exhaust duct 300 away from the elastic member 500, and this sealing component 600 is sandwiched between the first exhaust duct 300 and a battery module to seal the connection between the first exhaust duct 300 and the battery module; and a sealing component 600 is provided on the side of the second exhaust duct 400 away from the elastic member 500, and this sealing component 600 is sandwiched between the second exhaust duct 400 and another battery module to seal the connection between the second exhaust duct 400 and the battery module. The sealing component 600 has a third through hole 610, which communicates with either the first through hole 310 or the second through hole 410. Specifically, the third through hole 610 on the sealing component 600 between the first exhaust flue 300 and the battery module is connected to the first through hole 310, so that the flue gas in the battery pack passes through the third through hole 610, the first through hole 310, and the inner cavity of the first exhaust flue 300 in sequence, and then is discharged from the first exhaust port 320; the third through hole 610 on the sealing component 600 between the second exhaust flue 400 and the battery module is connected to the second through hole 410, so that the flue gas in the battery pack passes through the third through hole 610, the second through hole 410, and the inner cavity of the second exhaust flue 400 in sequence, and then is discharged from the second exhaust port 420. Because of the presence of the elastic element 500, even if the impact force is large during depressurization, the elastic element 500 can apply pressure to the first exhaust flue 300 and the second exhaust flue 400, thereby ensuring that the sealing component 600 on the side of the first exhaust flue 300 away from the elastic element 500 is always in close contact with the first exhaust flue 300 and the battery module, avoiding the failure of the seal at the connection between the first exhaust flue 300 and the battery module; the sealing component 600 on the side of the second exhaust flue 400 away from the elastic element 500 is always in close contact with the second exhaust flue 400 and the battery module, avoiding the failure of the seal at the connection between the second exhaust flue 400 and the battery module.

[0035] In some examples, please refer to Figure 4The sealing assembly 600 includes a plurality of first sealing portions 620 spaced apart along a first direction X, each first sealing portion 620 having a third through hole 610. A first sealing portion 620 surrounds the outer periphery of each first through hole 310 and each second through hole 410. It should be noted that in this embodiment, the sealing assembly 600 consists of multiple independent sealing structures (i.e., first sealing portions 620), each first sealing portion 620 corresponding to one first through hole 310 or one second through hole 410. That is, each first sealing portion 620 specifically seals the first through hole 310 or the second through hole 410 to prevent flue gas leakage. Because of the presence of the elastic element 500, even if the impact force is large during depressurization, the elastic element 500 can apply pressure to the first exhaust flue 300 and the second exhaust flue 400, thereby ensuring that the multiple first sealing parts 620 on the side of the first exhaust flue 300 away from the elastic element 500 are always in close contact with the first exhaust flue 300 and the battery module, avoiding the failure of the seal at the connection between the first exhaust flue 300 and the battery module; the multiple first sealing parts 620 on the side of the second exhaust flue 400 away from the elastic element 500 are always in close contact with the second exhaust flue 400 and the battery module, avoiding the failure of the seal at the connection between the second exhaust flue 400 and the battery module.

[0036] In some examples, please refer to Figure 5 The sealing assembly 600 includes a second sealing portion 630, which is fitted to the side of the first exhaust duct 300 away from the elastic member 500 or the side of the second exhaust duct 400 away from the elastic member 500. The second sealing portion 630 has multiple third through holes 610, each corresponding to a first through hole 310 or a second through hole 410. It should be noted that in this embodiment, the sealing assembly 600 is a single integral structure (i.e., the second sealing portion 630). The second sealing portion 630 located on the side of the first exhaust duct 300 away from the elastic member 500 seals all the first through holes 310 on the first exhaust duct 300; the second sealing portion 630 located on the side of the second exhaust duct 400 away from the elastic member 500 seals all the second through holes 410 on the second exhaust duct 400. Because of the presence of the elastic element 500, even if the impact force is large during depressurization, the elastic element 500 can apply pressure to the first exhaust flue 300 and the second exhaust flue 400, thereby ensuring that the second sealing part 630 on the side of the first exhaust flue 300 away from the elastic element 500 is always in close contact with the first exhaust flue 300 and the battery module, thus avoiding the failure of the seal at the connection between the first exhaust flue 300 and the battery module; the second sealing part 630 on the side of the second exhaust flue 400 away from the elastic element 500 is always in close contact with the second exhaust flue 400 and the battery module, thus avoiding the failure of the seal at the connection between the second exhaust flue 400 and the battery module.

[0037] In some embodiments, please refer to Figure 1 and Figure 13 Multiple elastic elements 500 are disposed between the first exhaust flue 300 and the second exhaust flue 400. Specifically, the multiple elastic elements 500 are distributed at intervals along the first direction X, providing balanced support and compressive force to the flues (i.e., the first exhaust flue 300 and the second exhaust flue 400) at different positions. The multiple elastic elements 500 work together to effectively avoid the problem of tilting or sealing failure of the flues (i.e., the first exhaust flue 300 and the second exhaust flue 400) due to uneven local force. When the battery module on the first exhaust flue 300 side is depressurized, due to the presence of the multiple elastic elements 500, the multiple elastic elements 500 can cooperate with each other to disperse and transmit the impact force to the entire first exhaust flue 300. When these elastic elements 500 deform under impact, they exert opposing forces on the first exhaust duct 300 from different directions, ensuring the first exhaust duct 300 maintains a relatively stable position during stress, further enhancing the sealing effect between the first exhaust duct 300 and the battery module. Similarly, multiple elastic elements 500 achieve the same effect on the second exhaust duct 400. Furthermore, the arrangement of multiple elastic elements 500 can adapt to the complex stress conditions that the ducts (i.e., the first exhaust duct 300 and the second exhaust duct 400) may experience under different operating conditions. During long-term operation of the battery pack, differences in temperature, pressure, and other factors may exist in different parts. Multiple elastic elements 500 can flexibly adjust the magnitude of the compressive force according to the actual stress changes at their respective locations, continuously providing a stable and reliable sealing guarantee for the ducts (i.e., the first exhaust duct 300 and the second exhaust duct 400), improving the safety and stability of the battery pack.

[0038] In some embodiments, the elastic element 500 is positioned corresponding to the first through hole 310 or the second through hole 410 (not shown in the figure) to further improve the sealing effect. When the battery module releases flue gas by depressurization, the first through hole 310 or the second through hole 410 at the corresponding position becomes the channel for flue gas discharge, and the pressure impact and high temperature effect on this area are more significant. By positioning the elastic element 500 at the corresponding position, the displacement and deformation around the first through hole 310 or the second through hole 410 caused by the impact force can be effectively compensated in the first instance. When the battery module on the first exhaust duct 300 side is depressurized, a strong impact force acts on the area of ​​the first exhaust duct 300 near the first through hole 310, causing this area to tend to expand outward or slightly shift. The corresponding elastic element 500 can then apply a counterforce through its own elastic deformation, offsetting part of the impact force. Simultaneously, through continuous compression, the sealing component 600 remains tightly fitted to the periphery of the first through hole 310 of the first exhaust duct 300 and the battery module, effectively preventing gas leakage from the connection between the first through hole 310 and the first battery module 100. Similarly, when the battery module on the second exhaust duct 400 side is depressurized, the corresponding elastic element 500 also provides a sealing guarantee at the connection between the second exhaust duct 400 and the battery module, improving the sealing performance of the entire battery pack under hazardous conditions and providing more reliable support for the safe and stable operation of the battery pack.

[0039] In some examples, the elastic element 500 is positioned corresponding to a first through hole 310 and a second through hole 410 (not shown in the figure). This example maximizes the function of the elastic element 500. Each elastic element 500 is precisely positioned corresponding to the first through hole 310 and the second through hole 410. When the battery module begins to depressurize, the powerful airflow from the explosion-proof valve and the accompanying impact force act on the corresponding elastic element 500. The elastic element 500, with its excellent elastic properties, can quickly respond to this impact force, absorbing most of the energy through elastic deformation, thereby effectively mitigating the direct impact of the impact force on the first exhaust duct 300 or the second exhaust duct 400. Because the elastic element 500 is precisely aligned with the through hole, it can provide more targeted support and compressive force to the first exhaust flue 300 or the second exhaust flue 400 during the impact buffering process. This ensures that the flue will not undergo excessive displacement or deformation when subjected to impact, maintaining a tight fit between the first exhaust flue 300 and the first battery module 100, and between the second exhaust flue 400 and the second battery module 200. This ensures the stability of the sealing structure and further enhances the safety and reliability of the battery pack in the face of emergencies such as cell leakage and explosion.

[0040] In some embodiments, such as Figure 1As shown, grooves 900 are formed on the opposite sides of the first exhaust duct 300 and the second exhaust duct 400. Both ends of the elastic member 500 are respectively accommodated within one of the grooves 900, meaning that both ends of the elastic member 500 can be embedded into the first exhaust duct 300 and the second exhaust duct 400 respectively. This reduces the calibration accuracy required for installing the elastic member 500, and makes installation quicker and more convenient.

[0041] According to the second aspect of this application, please refer to Figure 6 , Figure 7 , Figure 8 and Figure 9 This embodiment provides a battery pack, which includes a first battery module 100, a second battery module 200, and a smoke exhaust structure. That is, the battery pack of this embodiment possesses all the beneficial effects of the aforementioned smoke exhaust structure, which will not be elaborated further here. The first battery module 100 and the second battery module 200 are spaced apart from each other. The first battery module 100 includes a first explosion-proof valve 110 facing the second battery module 200, and the second battery module 200 includes a second explosion-proof valve 210 facing the first battery module 100. A first exhaust duct 300 and a second exhaust duct 400 are disposed between the first battery module 100 and the second battery module 200. The first through hole 310 of the first exhaust duct 300 faces the first explosion-proof valve 110, and the second through hole 410 of the second exhaust duct 400 faces the second explosion-proof valve 210. This configuration ensures that when the first explosion-proof valve 110 or the second explosion-proof valve 210 is opened, the generated flue gas can quickly and smoothly enter the exhaust flue through the corresponding through-hole and be effectively discharged. The elastic element 500 is disposed between the first exhaust flue 300 and the second exhaust flue 400 and applies pressure to the first exhaust flue 300 and the second exhaust flue 400 respectively.

[0042] It should be noted that the battery pack in this embodiment can be a minimalist design, meaning the battery pack does not have a sealed space. This design simplifies the structure and reduces production costs while ensuring that all functions of the battery pack are performed normally. It also provides advantages in heat dissipation and other aspects, enabling the battery pack to maintain more stable performance during operation.

[0043] In some embodiments, please refer to Figure 7 and Figure 8 The first battery module 100 includes a plurality of first battery cells 120 and a first terminal post 130. The plurality of first battery cells 120 are stacked along a first direction X. The first terminal post 130 and the first explosion-proof valve 110 are disposed on different sides of the first battery cells 120.

[0044] It should be noted that the orderly stacking of multiple first battery cells 120 along the first direction X helps optimize the space utilization efficiency of the first battery module 100 and achieves higher energy density within a limited space. The first terminal 130, as a key component connecting the first battery module 100 to the external circuit, undertakes a crucial current transmission task, efficiently and stably outputting the electrical energy stored in the first battery cells 120 to the external circuit for normal operation. The first explosion-proof valve 110 bears the heavy responsibility of ensuring the safe operation of the first battery module 100. When the internal pressure of the first battery cell 120 rises sharply due to various abnormal conditions such as overcharging or overheating, the first explosion-proof valve 110 can quickly open to release the internal pressure and prevent serious safety accidents such as explosion of the first battery module 100 due to excessive pressure. By placing the first terminal post 130 and the first explosion-proof valve 110 on different sides of the first battery cell 120, not only can the mutual interference that may occur between the two during the functional implementation process be effectively avoided, but the structural layout of the entire first battery module 100 is further optimized, so that each component can perform its own function and work together to provide a solid guarantee for the stable operation of the battery pack.

[0045] In some embodiments, please refer to Figure 9 and Figure 10 The second battery module 200 includes multiple second battery cells 220 and second terminals 230. The multiple second battery cells 220 are stacked along the first direction X. This arrangement not only makes full use of the internal space of the battery pack, but also effectively improves the overall performance of the second battery module 200. The various second battery cells 220 work closely together to ensure stable storage and supply of electrical energy.

[0046] The second terminal 230 and the second explosion-proof valve 210 are respectively located on different sides of the second battery cell 220. The second terminal 230, as a key node connecting the second battery module 200 to the external circuit, plays a crucial role in conducting current. Whether it's smoothly outputting the stored energy from the second battery module 200 when the battery pack is supplying power to external devices, or guiding external energy into the second battery module 200 for storage during charging, the second terminal 230 ensures efficient and stable energy exchange between the battery pack and the external system. The second explosion-proof valve 210 is a vital safeguard for the safe operation of the second battery module 200. When the pressure inside the second battery cell 220 rises rapidly due to various complex reasons, such as overcharging or internal short circuits, the second explosion-proof valve 210 responds quickly and opens promptly, releasing the excessive pressure inside the second battery cell 220. This crucial action effectively avoids serious safety hazards such as battery module explosions caused by pressure overload, greatly improving the safety of the entire battery pack. By placing the second terminal 230 and the second explosion-proof valve 210 on different sides of the second battery cell 220, the mutual interference that may occur between the two during operation is avoided, and the overall structural layout of the second battery module 200 is optimized, so that each component can give full play to its own function and work together to provide a solid guarantee for the stable operation of the battery pack.

[0047] In some embodiments, please refer to Figure 11 The first battery module 100 includes a first end plate 140 and a first connector 150. The first end plate 140 is disposed on both sides of the first battery module 100 in the first direction X. Its main function is to effectively limit and protect the multiple first battery cells 120 within the first battery module 100. The first connector 150 is disposed on both sides of the first battery module 100 in the second direction Y, and is stably connected to the first end plates 140 on both sides of the first battery module 100.

[0048] It should be noted that during the daily operation of the first battery module 100 and under complex working conditions such as external vibrations, the first end plate 140 can prevent the displacement of the first battery cell 120, maintain the stability of the entire second battery module 200 structure, ensure the solid electrical connection between the first battery cells 120, and avoid short circuits and other faults caused by the shaking of the first battery cells 120, thereby ensuring the reliable operation of the first battery module 100. The first connector 150 acts as a rigid support for the entire first battery module 100, not only strengthening the structural strength of the first battery module 100 in the second direction Y, but also tightly connecting the first end plates 140 on both sides, making the entire first battery module 100 a stable integral structure. When facing external impacts from different directions, the first connector 150 can work with the first end plate 140 to jointly disperse and bear the external force, effectively reducing the risk of module deformation or damage caused by external forces. For example, when the battery pack is subjected to bumps or collisions during transportation, the first connector 150 and the first end plate 140 cooperate with each other to protect the individual battery cells in the first battery module 100 from damage to the maximum extent, maintain the normal working performance of the first battery module 100, and provide a solid structural guarantee for the stable operation of the entire battery pack.

[0049] In some embodiments, please refer to Figure 12 The second battery module 200 includes a second end plate 240 and a second connector 250. The second end plate 240 is disposed on both sides of the second battery module 200 in the first direction X, and its main function is to effectively limit and protect the multiple second battery cells 220 within the second battery module 200. The second connector 250 is disposed on both sides of the second battery module 200 in the second direction Y, and is stably connected to the second end plates 240 on both sides of the second battery module 200.

[0050] It should be noted that during the daily operation of the second battery module 200, and under complex working conditions such as transportation bumps and equipment vibrations, the second end plate 240 can effectively prevent the displacement of the second battery cells 220, maintain the stability of the internal structure of the second battery module 200, ensure that the electrical connection between the second battery cells 220 is always stable and reliable, and avoid serious faults such as short circuits caused by the shaking of the second battery cells 220, thus laying a solid foundation for the smooth operation of the second battery module 200. The second connector 250 acts as a rigid support for the second battery module 200, greatly enhancing the structural strength of the second battery module 200 in the second direction Y. By firmly connecting the second end plates 240 on both sides, the second connector 250 makes the entire second battery module 200 form a robust integral structure. When the battery pack encounters external force impacts from different directions, the second connector 250 can work together with the second end plate 240 to jointly bear and disperse the external force. For example, when the battery pack is subjected to an accidental collision during transportation or strong vibrations caused by equipment operation, the second connector 250 and the second end plate 240 cooperate to minimize the damage to the second battery cell 220 inside the second battery module 200 by external forces, ensuring that the normal performance of the second battery module 200 is not affected, and providing strong structural support for the safe and stable operation of the entire battery pack.

[0051] In some examples, please refer to Figure 6 The battery pack includes a base 800, on which the first battery module 100 and the second battery module 200 are systematically mounted. The base 800 provides a stable foundation for the entire battery pack, supporting the weight of the first battery module 100 and the second battery module 200, and also protecting them from potential impacts and collisions from the bottom. This mounting method allows for a more organized layout of the first battery module 100 and the second battery module 200 within the battery pack, facilitating a compact design and efficient operation of the entire battery pack system. It also provides excellent structural support for the coordinated operation of subsequent components.

[0052] In some embodiments, please refer to Figure 11 and Figure 12The first exhaust duct 300 is fixed to the two first end plates 140 by fasteners 700. Fasteners 700 are generally made of high-strength materials with good corrosion resistance, such as special alloys. This fixing method ensures that the first exhaust duct 300 is precisely positioned and stably maintained on the side of the first battery module 100, ensuring that the first through hole 310 facing the first explosion-proof valve 110 is always in the appropriate relative position to the first explosion-proof valve 110. This not only ensures that flue gas can efficiently flow into the first exhaust duct 300 when the first explosion-proof valve 110 is open, but also enhances the stability of the first exhaust duct 300 under impact and other external forces, preventing displacement or damage. Similarly, the second exhaust duct 400 is fixed to the two second end plates 240 by fasteners 700. The use of fasteners 700 ensures that the second exhaust duct 400 is tightly connected to the second battery module 200 and its position is stable. When the second explosion-proof valve 210 is opened, a large amount of flue gas generated inside the second battery module 200 can smoothly flow into and be discharged from the second exhaust flue 400 through the second through hole 410 corresponding to the second explosion-proof valve 210. This fixed design effectively improves the reliability of the second exhaust flue 400, enabling it to perform its smoke exhaust function normally even under complex operating conditions.

[0053] It should be noted that during battery pack assembly, the first exhaust duct 300 is pre-installed on the first battery module 100 using fasteners 700. Fasteners 700 are typically made of durable materials with good mechanical properties, such as high-strength metal. During installation, fasteners 700 are precisely positioned at the corresponding locations of the first exhaust duct 300 and the first battery module 100, and securely connected using bolts or welding to ensure accurate positioning and lay the foundation for efficient exhaust. Similarly, the second exhaust duct 400 is installed on the second battery module 200 in the same manner, ensuring a tight and stable connection between the second exhaust duct 400 and the second battery module 200. The next step is to install them onto the base support 800. The base support 800, as the basic load-bearing component of the battery pack, plays a crucial role in the stability of the entire battery pack structure. Then comes the installation of the elastic element 500. This is usually achieved using other tooling to clamp the elastic element 500. The elastic element 500 is placed and installed between the first exhaust flue 300 and the second exhaust flue 400 using a tooling fixture, ensuring that the elastic element 500 evenly abuts against the first exhaust flue 300 and the second exhaust flue 400, thus preparing it to play a role in buffering impact and strengthening the sealing of the flue and battery module during the subsequent operation of the battery pack.

[0054] In some examples, the first exhaust duct 300, the second exhaust duct 400, and the elastic element 500 are integrated into a single structure. Specifically, the assembly process of the battery pack is as follows: First, the first battery module 100 and the second battery module 200 are installed onto the base 800. The base 800, as the basic load-bearing component of the entire battery pack, must have a flat surface free of debris to ensure the accuracy and stability of the module installation. When installing the battery modules, positioning fixtures or the pre-set positioning structure on the base 800 can be used to accurately place the first battery module 100 and the second battery module 200 in their respective positions. Then, the first battery module 100 and the second battery module 200 are firmly fixed to the base 800 using bolts or other reliable fixing methods. After completing the installation of the first battery module 100 and the second battery module 200 with the base 800, the next step is to install the integrated structure consisting of the first exhaust duct 300, the second exhaust duct 400, and the elastic element 500. During installation of the integrated structure, its position must be adjusted to ensure that the first exhaust duct 300 faces the first explosion-proof valve 110 of the first battery module 100, the second exhaust duct 400 faces the second explosion-proof valve 210 of the second battery module 200, and the elastic element 500 is positioned appropriately between the first exhaust duct 300 and the second exhaust duct 400. Auxiliary tooling can be used during installation to assist in positioning and installation, allowing the integrated structure to be installed between the first battery module 100 and the second battery module 200. After installation, check that the connection between the integrated structure and the battery modules is tight and that all components are in the correct positions to ensure the integrity and reliability of the entire battery pack structure.

[0055] According to a third aspect of this application, an energy storage device is provided, comprising a battery pack as described in any of the foregoing embodiments, the battery pack having a smoke extraction assembly. This energy storage device possesses all the beneficial effects of the aforementioned smoke extraction assembly and battery pack, which will not be elaborated further herein.

[0056] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0057] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0058] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A smoke exhaust structure, characterized in that, include: The first exhaust flue (300) has a first through hole (310) on one side in the second direction (Y), and the first through hole (310) communicates with the inner cavity of the first exhaust flue (300); The second exhaust flue (400) is spaced apart from the first exhaust flue (300) in the second direction (Y). The first through hole (310) is located on the side of the first exhaust flue (300) away from the second exhaust flue (400). The first exhaust flue (300) is provided with a second through hole (410) on the side away from the second exhaust flue (400), and the second through hole (410) communicates with the inner cavity of the second exhaust flue (400). An elastic element (500) is disposed between the first exhaust flue (300) and the second exhaust flue (400) and connects the first exhaust flue (300) and the second exhaust flue (400).

2. The smoke exhaust structure according to claim 1, characterized in that, The first exhaust flue (300) has a first exhaust port (320) at each end in the first direction (X), and the first exhaust port (320), the inner cavity of the first exhaust flue (300) and the first through hole (310) are connected. The second exhaust flue (400) has a second exhaust port (420) at each end in the first direction (X), and the second exhaust port (420), the inner cavity of the second exhaust flue (400) and the second through hole (410) are connected.

3. The smoke exhaust structure according to claim 1, characterized in that, The first exhaust duct (300) and the second exhaust duct (400) are both provided with the sealing assembly (600) on the side away from the elastic member (500) and on the side away from the elastic member (500). The sealing assembly (600) has a third through hole (610) that communicates with the first through hole (310) or the second through hole (410).

4. The smoke exhaust structure according to claim 3, characterized in that, The sealing assembly (600) includes a plurality of first sealing portions (620) spaced apart along a first direction (X), and each of the first sealing portions (620) is provided with the third through hole (610); Each of the first through holes (310) and each of the second through holes (410) is surrounded by a first sealing portion (620).

5. The smoke exhaust structure according to claim 3, characterized in that, The sealing assembly (600) includes a second sealing portion (630) that is in contact with the side of the first exhaust duct (300) away from the elastic member (500) or the side of the second exhaust duct (400) away from the elastic member (500). The second sealing part (630) is provided with a plurality of third through holes (610), each of the third through holes (610) being provided in correspondence with a first through hole (310) or a second through hole (410).

6. The smoke exhaust structure according to claim 3, characterized in that, A plurality of elastic elements (500) are provided at intervals along a first direction (X) between the first exhaust flue (300) and the second exhaust flue (400).

7. The smoke exhaust structure according to claim 6, characterized in that, The elastic element (500) is positioned corresponding to the first through hole (310) or the second through hole (410).

8. The smoke exhaust structure according to claim 6, characterized in that, The first exhaust flue (300) and the second exhaust flue (400) have grooves (900) on their opposite sides, and the two ends of the elastic member (500) are respectively accommodated in one of the grooves (900).

9. A battery pack, characterized in that, include: A first battery module (100) and a second battery module (200) spaced apart from each other, wherein the first battery module (100) includes a first explosion-proof valve (110) disposed toward the second battery module (200), and the second battery module (200) includes a second explosion-proof valve (210) disposed toward the first battery module (100). The smoke exhaust structure as described in any one of claims 1 to 8 is disposed between the first battery module (100) and the second battery module (200), wherein the first through hole (310) of the smoke exhaust structure faces the first explosion-proof valve (110), and the second through hole (410) of the smoke exhaust structure faces the second explosion-proof valve (210); The elastic element (500) of the exhaust structure applies pressure to the first exhaust duct (300) and the second exhaust duct (400) respectively.

10. An energy storage device, characterized in that, Includes the battery pack as described in claim 9.

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