Buffer structure, battery pack and electric equipment

Abstract

The utility model discloses a buffer structure, a battery pack and electric equipment, and relates to the technical field of batteries, the buffer structure is arranged between the inner wall of a shell in the battery pack and a smoke exhaust pipeline, a battery cell assembly is arranged on the side, away from the inner wall of the shell, of the smoke exhaust pipeline, and an anti-explosion valve matched with the smoke exhaust pipeline is arranged on the battery cell assembly. The buffering structure comprises a buffering body and at least one first reinforcing part. The two sides of the buffering body abut against the inner wall of the shell and the smoke exhaust pipeline correspondingly. The first reinforcing part is arranged on the buffering main body, and the first reinforcing part and the anti-explosion valve are oppositely arranged. The explosion-proof valve explodes smoke to impact the inner wall of the smoke exhaust pipeline, and the first reinforcing part at least partially covers the position of the corresponding outer wall, impacted by the smoke, of the smoke exhaust pipeline. According to the smoke exhaust pipeline, the impact resistance of the smoke exhaust pipeline to smoke impact can be remarkably enhanced through the first reinforcing part, and the safety and reliability of the corresponding battery pack are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a buffer structure, a battery pack, and an electrical device. Background Art

[0002] A battery pack is composed of several key components. These components include the cell assembly and the flue assembly. The cell assembly is the core of the battery pack, responsible for storing and releasing electrical energy. To ensure the safe operation of the battery pack, the cell assembly is typically equipped with an explosion-proof valve. The valve's function is to quickly release internal gases when the battery reaches abnormally high temperatures or pressure, preventing the battery from exploding.

[0003] At the same time, to ensure the safety of the explosion-proof valve, a mica board is usually installed between the explosion-proof valve and the flue assembly. The mica board is a high-temperature resistant material with good insulation properties. It not only protects the explosion-proof valve from the influence of the external environment, but also prevents the spread of heat and flames to a certain extent. In addition, the mica board is usually designed with an engraved structure that is compatible with the explosion-proof valve. This engraved structure ensures that when the explosion-proof valve releases gas, it forms a flue gas channel by destroying the engraved structure, and then accurately guides the flue gas into the flue assembly, thereby effectively exhausting harmful gases inside the battery pack.

[0004] However, in the existing battery pack design, the engraved structure on the mica board is easily blown away by the impact of high-pressure flue gas and hits the inner wall of the exhaust channel after being damaged by the impact, causing a large abnormal noise. In addition, the flue gas will continue to impact one position of the exhaust pipe for a certain period of time, posing a certain safety hazard. Utility Model Content

[0005] The present application provides a buffer structure, a battery pack and an electrical device, which can significantly enhance the impact resistance of the smoke exhaust duct to smoke impact through the first reinforcement part, thereby improving the safety and reliability of the corresponding battery pack.

[0006] In the first aspect, the present application provides a buffer structure, which is arranged between the inner wall of the shell and the smoke exhaust duct in the battery pack. A battery cell assembly is arranged on the side of the smoke exhaust duct away from the inner wall of the shell, and an explosion-proof valve compatible with the smoke exhaust duct is arranged on the battery cell assembly.

[0007] The buffer structure includes a buffer body and at least one first reinforcement portion. The two sides of the buffer body abut against the inner wall of the shell and the smoke exhaust pipe respectively. The first reinforcement portion is arranged on the buffer body and is arranged opposite to the explosion-proof valve.

[0008] When the explosion-proof valve explodes, smoke impacts the inner wall of the smoke exhaust pipe, and the first reinforcement portion at least partially covers the corresponding outer wall position of the smoke exhaust pipe impacted by the smoke.

[0009] To improve the safety and stability of the battery pack, a buffer structure can be installed between the inner wall of the battery pack's center casing and the exhaust duct. This buffer structure effectively absorbs and mitigates impact forces in the event of an accident, thereby protecting the battery cell components and exhaust duct from damage. The exhaust duct is equipped with a battery cell assembly on the side facing away from the inner wall of the casing, and an explosion-proof valve compatible with the exhaust duct is installed on the battery cell assembly.

[0010] The buffer structure of the present application may include two parts: a buffer body and at least one first reinforcement portion. The two sides of the buffer body are tightly abutted between the inner wall of the shell and the smoke exhaust duct, ensuring that the force can be effectively transmitted in the event of an impact. The first reinforcement portion is arranged on the surface of the buffer body, and the position of the first reinforcement portion corresponds to the explosion-proof valve. This design allows the first reinforcement portion to at least partially cover the corresponding outer wall position of the smoke exhaust duct impacted by the smoke when the smoke explodes from the explosion-proof valve.

[0011] When smoke erupts from the explosion-proof valve, it impacts the inner wall of the exhaust duct with extremely high pressure. This is when the first reinforcement becomes particularly important. It significantly strengthens the exhaust duct's resistance to the impact of the smoke, preventing deformation or damage from severe impact. This ensures better protection for the battery cell components within the battery pack, even in extreme situations, ensuring the safety and reliability of the entire battery pack.

[0012] In some examples, the first reinforcement portion is a thickened structure.

[0013] By thickening, the strength of the area where the first reinforcement part is located can be improved. The buffer structure is in a compressed state after assembly. The thickness of the compressed first reinforcement part and other areas does not change, and the density is higher and the strength is higher.

[0014] In some examples, the first reinforcement portion is at least one of a rubber layer, a silicone layer, a metal sheet, a spring, and a spring.

[0015] The above-mentioned first reinforcement part can be at least one of a rubber layer, a silicone layer, a metal sheet, a spring, and a spring. These different structures can reinforce the corresponding positions of the buffer structure, and the specific selection and setting can be determined according to actual needs. For example, the rubber layer has good elasticity and flexibility, and can provide effective buffering and shock absorption effects; the silicone layer has high temperature resistance and chemical resistance, and is suitable for use in high temperature or chemical environments; the metal sheet has high strength and rigidity, and can provide stronger support and protection; the spring and spring have good elasticity and restoring force, and can quickly return to their original state after being subjected to external force. Different types of first reinforcement parts also have their own unique characteristics, and suitable materials and structures can be selected according to specific application scenarios and needs.

[0016] In some examples, the first reinforcement portion has a size adapted to that of the explosion-proof valve.

[0017] The dimensions of the first reinforcement match those of the explosion-proof valve. This design more effectively resists smoke impacts on the explosion-proof valve. When smoke impacts the explosion-proof valve, it typically indicates that at least some of the battery cells in the battery assembly have failed or been damaged. By rapidly discharging the smoke, the risk of explosion is significantly reduced and additional protection is provided to the remaining intact battery cells.

[0018] In some examples, stresses in different areas of the smoke exhaust duct are different, and the strength of each part of the buffer structure is proportional to the stress magnitude of the corresponding area of the smoke exhaust duct.

[0019] Different areas of the exhaust duct are subjected to uneven stress. To address this situation, the above-mentioned buffer structure is introduced in the corresponding parts of the exhaust duct. The strength of each part of the buffer structure is also set according to the stress level in the corresponding area of the exhaust duct. That is to say, the strength of the buffer structure will increase accordingly in areas with greater stress. This design enables the buffer structure to better absorb and disperse stress, thereby achieving a more effective buffering and vibration reduction effect. In this way, the exhaust duct can be effectively protected from excessive stress, its service life can be extended, and the stable operation of the charging and discharging process in the entire battery pack can be ensured.

[0020] In some examples, the buffer structure is configured as a layer structure and is provided with at least two layers. The buffer structure includes a first connecting layer and a buffer layer. The first connecting layer can be connected to the outer peripheral side of the smoke exhaust duct, and the buffer layer directly or indirectly abuts against the inner wall of the shell.

[0021] The buffer structure can be configured to have a layered structure and include at least two layers. Specifically, the buffer structure includes a first connecting layer and a buffer layer. The function of the first connecting layer is to be able to connect to the outer peripheral side of the smoke exhaust duct, thereby ensuring that the buffer structure can be firmly fixed on the smoke exhaust duct. The buffer layer directly or indirectly contacts the inner wall of the shell, playing a role of buffering and shock absorption. Through the design of this layered structure, the vibration and impact force generated by the smoke exhaust duct during operation can be effectively absorbed and dispersed, thereby protecting the shell from damage and extending the service life of the entire battery pack.

[0022] In some examples, the buffer structure is configured as a layer structure and is provided with at least three layers. The buffer structure includes a first connecting layer, a buffer layer, and a second connecting layer. The first connecting layer can be connected to the outer peripheral side of the smoke exhaust duct, and the second connecting layer can be connected to the inner wall of the shell. The buffer layer is indirectly abutted to the inner wall of the shell through the second connecting layer.

[0023] The buffer structure described above can also be configured as a layered structure comprising at least three layers. Specifically, the buffer structure comprises a first connecting layer, a buffer layer, and a second connecting layer. The first connecting layer is configured to directly connect to the outer periphery of the smoke exhaust duct, while the second connecting layer is configured to connect to the inner wall of the housing. The buffer layer indirectly contacts the inner wall of the housing through the second connecting layer, exerting pressure.

[0024] At least one of the first and second connecting layers can be configured as an adhesive layer. The adhesive layer securely adheres to the locations it contacts, ensuring the stability and sealing of the entire buffer structure. In this way, the buffer layer effectively absorbs and cushions the vibration and impact forces generated by the operation of the smoke exhaust duct, protecting the housing from damage. This multi-layered design not only enhances the buffering effect but also strengthens the reliability and durability of the overall structure.

[0025] In some examples, the buffer structure includes at least one of flue foam, a rubber pad, a silicone pad, a spring, and a spring.

[0026] The buffer structure further reduces vibration and noise generated during flue gas flow, thereby improving the stability and service life of the overall system. The buffer structure can be composed of a variety of materials, such as flue foam, which offers excellent sound absorption and cushioning properties; rubber pads, whose elasticity can absorb some vibration; and silicone pads, which offer excellent high-temperature and aging resistance. Springs and shrapnel provide a certain degree of elasticity during flue gas flow, further reducing vibration and impact. The materials used for these buffer components can be selected and combined to achieve the optimal buffering effect.

[0027] In a second aspect, the present application provides a battery pack comprising the above-mentioned buffer structure and shell, wherein the shell has a receiving cavity, and the buffer structure, battery cell assembly and smoke exhaust duct are all arranged in the receiving cavity.

[0028] The battery pack with the above-mentioned buffer structure can significantly enhance the smoke exhaust pipe's resistance to smoke impact through the first reinforcement part, thereby improving the safety and reliability of the corresponding battery pack. Specifically, the two sides of the buffer body are tightly abutted between the inner wall of the shell and the smoke exhaust pipe, respectively, to ensure that the force can be effectively transmitted when an impact occurs. The first reinforcement part is arranged on the surface of the buffer body, and the position of the first reinforcement part corresponds to the explosion-proof valve. Such a design enables the first reinforcement part to at least partially cover the corresponding outer wall position of the smoke exhaust pipe impacted by the smoke when the explosion-proof valve explodes smoke. When the explosion-proof valve explodes smoke, the smoke will impact the inner wall of the smoke exhaust pipe with extremely high pressure. The role of the first reinforcement part is particularly important. The first reinforcement part can significantly enhance the smoke exhaust pipe's resistance to smoke impact, thereby preventing the smoke exhaust pipe from being deformed or damaged due to severe impact.

[0029] In a third aspect, the present application provides an electrical device, comprising a battery pack and a device body as described above, wherein the device body has an assembly cavity, and the battery pack is disposed in the assembly cavity.

[0030] The electrical equipment with the above-mentioned battery pack can significantly enhance the smoke exhaust pipe's resistance to smoke impact through the first reinforcement part, thereby improving the safety and reliability of the corresponding battery pack. Specifically, the two sides of the buffer body are tightly abutted between the inner wall of the shell and the smoke exhaust pipe, respectively, to ensure that the force can be effectively transmitted when an impact occurs. The first reinforcement part is arranged on the surface of the buffer body, and the position of the first reinforcement part corresponds to the explosion-proof valve. Such a design enables the first reinforcement part to at least partially cover the corresponding outer wall position of the smoke exhaust pipe impacted by the smoke when the explosion-proof valve explodes smoke. When the explosion-proof valve explodes smoke, the smoke will impact the inner wall of the smoke exhaust pipe with extremely high pressure. The role of the first reinforcement part is particularly important. The first reinforcement part can significantly enhance the smoke exhaust pipe's resistance to smoke impact, thereby preventing the smoke exhaust pipe from being deformed or damaged due to severe impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in this application or the prior art, the following briefly introduces the drawings required for use in the examples or descriptions of the prior art. Obviously, the drawings described below are only some examples of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 This is a schematic diagram of a structural explosion when the battery pack in an example of the present application has a buffer structure.

[0033] Figure 2 This is a schematic diagram of the structural explosion of the buffer structure, smoke exhaust duct and mica board in the battery pack in an example of this application.

[0034] Figure 3 for Figure 2 A in the middle shows a partially enlarged schematic diagram of the first reinforcement structure.

[0035] Figure 4 This is a partially enlarged schematic diagram of another shape of an example of the first reinforcement structure of the present application.

[0036] Figure 5 This is a schematic diagram of a structural explosion in which the buffer structure, the smoke exhaust duct and the mica board in the battery pack in an example of the present application are coordinated and the buffer structure includes an integrated second reinforcement structure.

[0037] Figure 6This is a schematic diagram of a structural explosion in which the buffer structure, smoke exhaust duct and mica board in a battery pack in an example of the present application are coordinated and the buffer structure includes a split second reinforcement structure.

[0038] Reference numerals:

[0039] 100. Buffer structure; 110. Buffer body; 120. First reinforcement part; 130. Second reinforcement part; 140. Avoidance hole; 200. Smoke exhaust duct; 210. Smoke inlet; 220. End assembly structure; 230. Middle assembly structure; 300. Battery cell assembly; 310. Explosion-proof valve; 400. Mica board; 500. Shell. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain this application and are not intended to limit this application.

[0041] To solve the above technical problems, please refer to Figures 1-6 As shown, the first aspect of the present application proposes a buffer structure 100, which can significantly enhance the impact resistance of the smoke exhaust duct 200 to smoke impact through the first reinforcement part 120, thereby improving the safety and reliability of the corresponding battery pack.

[0042] Reference Figures 1 to 3 In some examples, the buffer structure 100 is arranged between the inner wall of the shell 500 and the smoke exhaust duct 200 in the battery pack, and the battery cell assembly 300 is arranged on the side of the smoke exhaust duct 200 away from the inner wall of the shell 500. The battery cell assembly 300 is provided with an explosion-proof valve 310 that is compatible with the smoke exhaust duct 200.

[0043] The buffer structure 100 includes a buffer body 110 and at least one first reinforcement portion 120. The two sides of the buffer body 110 abut against the inner wall of the housing 500 and the smoke exhaust duct 200, respectively. The first reinforcement portion 120 is disposed on the buffer body 110 and is disposed opposite the explosion-proof valve 310.

[0044] When the explosion-proof valve 310 explodes, smoke impacts the inner wall of the exhaust duct 200. The first reinforcement 120 at least partially covers the corresponding outer wall of the exhaust duct 200 impacted by the smoke. When the explosion-proof valve 310 explodes, the first reinforcement 120 can strengthen the exhaust duct 200's ability to resist the impact of the smoke.

[0045] To improve the safety and stability of the battery pack, a buffer structure 100 can be installed between the inner wall of the battery pack's central housing 500 and the exhaust duct 200. The buffer structure 100 effectively absorbs and mitigates impact forces in the event of an accident, thereby protecting the battery cell assembly 300 and the exhaust duct 200 within the battery pack from damage. The battery cell assembly 300 is mounted on the side of the exhaust duct 200 facing away from the inner wall of the housing 500. The battery cell assembly 300 is equipped with an explosion-proof valve 310 that is compatible with the exhaust duct 200.

[0046] The buffer structure 100 of the present application may include two parts: a buffer body 110 and at least one first reinforcement portion 120. The two sides of the buffer body 110 are respectively tightly abutted between the inner wall of the shell 500 and the smoke exhaust duct 200 to ensure that the force can be effectively transmitted when an impact occurs. The first reinforcement portion 120 is arranged on the surface of the buffer body 110, and the position of the first reinforcement portion 120 corresponds to the explosion-proof valve 310. This design enables the first reinforcement portion 120 to at least partially cover the corresponding outer wall position of the smoke exhaust duct 200 impacted by the smoke when the smoke explodes from the explosion-proof valve 310.

[0047] When smoke erupts from explosion-proof valve 310, it impacts the inner wall of exhaust duct 200 at extremely high pressure. This is where the first reinforcement 120 becomes particularly crucial. It significantly strengthens the exhaust duct 200's resistance to the impact of the smoke, preventing deformation or damage to the duct 200 from severe impact. This ensures better protection for the battery cell assembly 300 within the battery pack, even in extreme situations, ensuring the safety and reliability of the entire battery pack.

[0048] Reference Figures 1 to 3 In some examples, the first reinforcement portion 120 is a thickened structure. This thickening can improve the strength of the area where the first reinforcement portion 120 is located. The buffer structure 100 is in a compressed state after assembly. The compressed first reinforcement portion 120 has the same thickness as other areas, resulting in higher density and strength. The first reinforcement portion 120 can be in a regular shape, such as a truncated cone, prism, cylinder, or prism. It can also be a combination of multiple regular shapes, such as a plum blossom shape.

[0049] In the above structure, the first reinforcement part 120 can be set to a thickened structural form. Through this thickening design method, the overall strength and rigidity of the area where the first reinforcement part 120 is located can be significantly improved. When the entire structure is assembled, the first reinforcement part 120 in a compressed state will exhibit characteristics different from other areas. The thickness of the position where the first reinforcement part 120 is located does not change significantly from the thickness of other positions of the buffer structure 100. Due to the thickened design of the first reinforcement part 120, the density of this area is higher, so that its strength is also correspondingly improved. This design not only improves the buffering capacity of the first reinforcement part 120, but also enhances its stability and durability in practical applications.

[0050] Reference Figures 1 to 3 In some examples, the first reinforcement portion 120 is at least one of a rubber layer, a silicone layer, a metal sheet, a spring, and a spring. All of these structures can reinforce corresponding locations of the buffer structure 100, and the specific configuration is based on needs. Different types of first reinforcement portions 120 also have corresponding characteristics.

[0051] The above-mentioned first reinforcement part 120 can be at least one of a rubber layer, a silicone layer, a metal sheet, a spring, and a shrapnel. These different structures can reinforce the corresponding positions of the buffer structure 100, and the specific selection and setting can be determined according to actual needs. For example, the rubber layer has good elasticity and flexibility, and can provide effective buffering and shock absorption effects; the silicone layer has high temperature resistance and chemical resistance, and is suitable for use in high temperature or chemical environments; the metal sheet has high strength and rigidity, and can provide stronger support and protection; the spring and shrapnel have good elasticity and restoring force, and can quickly return to their original state after being subjected to external force. Different types of first reinforcement parts 120 also have their own unique characteristics, and suitable materials and structures can be selected according to specific application scenarios and needs.

[0052] Reference Figures 1 to 3 In some examples, the dimensions of the first reinforcement portion 120 are adapted to those of the explosion-proof valve 310. This provides better resistance to smoke impact on the explosion-proof valve 310. When smoke impact occurs on the explosion-proof valve 310, it indicates that at least some of the battery cells in the battery cell assembly 300 are faulty or damaged. By quickly discharging the smoke, the risk of explosion can be reduced and intact battery cells can be protected.

[0053] The dimensions of the first reinforcement portion 120 match those of the explosion-proof valve 310. This design more effectively resists smoke impact on the explosion-proof valve 310. When the explosion-proof valve 310 is subjected to smoke impact, it typically indicates that at least some of the battery cells in the battery assembly 300 have failed or been damaged. By rapidly discharging the smoke, the risk of explosion is significantly reduced and additional protection is provided for the remaining intact battery cells.

[0054] Reference Figures 1 to 3 In some examples, the stress in different areas of the exhaust pipe 200 is different, and the strength of each part of the buffer structure 100 is proportional to the stress in the corresponding area of the exhaust pipe. This can achieve better buffering and vibration reduction.

[0055] The stresses borne by different areas of the smoke exhaust duct 200 are uneven. In order to cope with this situation, the above-mentioned buffer structure 100 is introduced in the corresponding parts of the smoke exhaust duct 200. The strength of each part of the buffer structure 100 is also set according to the stress magnitude of the corresponding area of the smoke exhaust duct 200. That is to say, the strength of the buffer structure 100 will increase accordingly in areas with greater stress. This design enables the buffer structure 100 to better absorb and disperse stress, thereby achieving a more effective buffering and vibration reduction effect. In this way, the smoke exhaust duct 200 can be effectively protected from excessive stress, its service life can be extended, and the stable operation of the charging and discharging process in the entire battery pack can be ensured.

[0056] Reference Figures 1 to 3 In some examples, the buffer structure 100 is configured as a layer structure and is provided with at least two layers. The buffer structure 100 includes a first connecting layer and a buffer layer. The first connecting layer can be connected to the outer peripheral side of the smoke exhaust duct 200, and the buffer layer directly or indirectly abuts against the inner wall of the shell 500.

[0057] The buffer structure 100 can be configured to have a layered structure and include at least two layers. Specifically, the buffer structure includes a first connecting layer and a buffer layer. The function of the first connecting layer is to be able to connect to the outer peripheral side of the smoke exhaust duct 200, thereby ensuring that the buffer structure 100 can be firmly fixed on the smoke exhaust duct 200. The buffer layer directly or indirectly contacts the inner wall of the shell 500, playing a role in buffering and shock absorption. Through the design of this layered structure, the vibration and impact force generated by the smoke exhaust duct 200 during operation can be effectively absorbed and dispersed, thereby protecting the shell 500 from damage and extending the service life of the entire battery pack.

[0058] Reference Figures 1 to 3In some examples, the buffer structure 100 is configured as a layer structure and is provided with at least three layers. The buffer structure 100 includes a first connecting layer, a buffer layer, and a second connecting layer. The first connecting layer can be connected to the outer peripheral side of the smoke exhaust duct 200, and the second connecting layer can be connected to the inner wall of the shell 500. The buffer layer is indirectly abutted to the inner wall of the shell 500 through the second connecting layer.

[0059] The buffer structure 100 described above can also be configured as a layered structure comprising at least three layers. Specifically, the buffer structure 100 comprises a first connecting layer, a buffer layer, and a second connecting layer. The first connecting layer directly connects to the outer periphery of the smoke exhaust duct 200, while the second connecting layer connects to the inner wall of the housing 500. The buffer layer indirectly contacts and applies pressure to the inner wall of the housing 500 through the second connecting layer.

[0060] Among these layers, at least one of the first and second connecting layers can be configured as an adhesive layer. The adhesive layer securely adheres to the locations it contacts, thereby ensuring the stability and sealing of the entire buffer structure 100. In this way, the buffer layer effectively absorbs and cushions the vibration and impact forces generated by the operation of the smoke exhaust duct 200, thereby protecting the housing 500 from damage. This multi-layered design not only enhances the buffering effect but also strengthens the reliability and durability of the overall structure.

[0061] In some examples, the buffer structure 100 includes at least one of flue foam, a rubber pad, a silicone pad, a spring, and a spring.

[0062] The function of the buffer structure 100 is to further reduce the vibration and noise generated during the flow of smoke, thereby improving the stability and service life of the overall system. The buffer structure 100 can include a variety of different materials, such as flue foam, which has good sound absorption and buffering properties. Rubber pads, with elasticity, can absorb some vibrations. Silicone pads have excellent high temperature resistance and aging resistance. Springs and shrapnel can provide a certain amount of elastic force during the flow of smoke, further reducing vibration and impact. The material selection of these buffer parts can be selected according to actual needs to use one or more combinations to achieve the best buffering effect.

[0063] The buffer structure 100 further includes at least one second reinforcement portion 130, and the second reinforcement portion 130 is provided with an assembly structure of the smoke exhaust duct 200. The shape of the second reinforcement portion 130 is adapted to the shape of the assembly structure.

[0064] Each smoke exhaust duct 200 has two end assembly structures 220 and one middle assembly structure 230, and correspondingly may be provided with three second reinforcement parts 130. This can have the effect of reducing vibration and noise, thereby increasing the service life of the entire battery pack.

[0065] The second reinforcement parts 130 of the present application can be arranged on the assembly structure of the smoke exhaust duct 200. The shapes of these second reinforcement parts 130 are precisely calculated to ensure that they are fully compatible with the shape of the assembly structure, thereby providing the best support and protection effect.

[0066] Specifically, each smoke exhaust duct 200 has two end assembly structures 220 and a central assembly structure 230. Three second reinforcements 130 can be installed in each of these assembly structures. The layout of these reinforcements is designed to evenly distribute stress and reduce deformation and damage caused by vibration and thermal expansion. This ensures that the smoke exhaust duct 200 remains stable during assembly and operation, thereby reducing vibration and noise. The central portion of the buffer structure 100 can be provided with an avoidance hole 140 that is compatible with the central assembly structure 230.

[0067] This structure not only improves the structural strength of the smoke exhaust duct 200 but also further extends the service life of the entire battery pack. Due to the reduced vibration and noise, the electronic components and battery cells within the battery pack can operate in a more stable and quiet environment, thereby extending their overall service life. Furthermore, the vibration and noise reduction effects help reduce noise pollution generated during equipment operation, improving the overall working environment.

[0068] Reference Figure 5 The second reinforcement portion 130 can be integrally provided on the buffer structure 100, referring to Figure 6 The second reinforcement portion 130 may also be separately and independently provided, depending on specific needs.

[0069] The circumference of the smoke exhaust duct 200 is wrapped with at least one layer of flue mica paper and / or flue insulation layer.

[0070] The above-mentioned exhaust pipe 200 of the present application is wrapped by at least one layer of flue mica paper and / or flue insulation layer. This design can play a role of protection and isolation, ensuring that the exhaust pipe 200 can still work normally in an environment of high temperature and harmful gases, thereby extending the service life of the battery pack and improving its safety. The presence of the flue mica paper and the flue insulation layer can not only effectively isolate heat transfer and prevent heat from damaging other components inside the battery pack (such as undamaged battery cells), but also reduce the interference of the external environment on the inside of the battery pack, ensuring that the battery pack can operate stably under various complex conditions. In addition, this wrapping layer can also play a certain role in fire prevention and heat insulation, further improving the overall safety performance of the battery pack.

[0071] In a second aspect, the present application provides a battery pack, comprising the above-mentioned buffer structure 100 and a shell 500 , wherein the shell 500 has a receiving cavity, and the buffer structure 100 , the battery cell assembly 300 and the smoke exhaust duct 200 are all arranged in the receiving cavity.

[0072] The battery pack having the above-mentioned buffer structure 100 can significantly enhance the impact resistance of the smoke exhaust pipe 200 to the impact of smoke through the first reinforcement part 120, thereby improving the safety and reliability of the corresponding battery pack. Specifically, the two sides of the buffer body 110 are tightly abutted between the inner wall of the shell 500 and the smoke exhaust pipe 200, respectively, to ensure that the force can be effectively transmitted when an impact occurs. The first reinforcement part 120 is arranged on the surface of the buffer body 110, and the position of the first reinforcement part 120 corresponds to the explosion-proof valve 310. This design enables the first reinforcement part 120 to at least partially cover the corresponding outer wall position of the smoke exhaust pipe 200 impacted by the smoke when the explosion-proof valve 310 releases smoke. When the explosion-proof valve 310 releases smoke, the smoke will impact the inner wall of the smoke exhaust pipe 200 with extremely high pressure. The role of the first reinforcement part 120 is particularly important. The first reinforcement portion 120 can significantly enhance the smoke exhaust duct 200's ability to resist smoke impact, thereby preventing the smoke exhaust duct 200 from being deformed or damaged due to severe impact.

[0073] The battery cell assembly 300 in the battery pack of the present application adopts an inverted structure. This design makes the battery pack shell 500 include a bottom guard plate, and the poles in the battery cell assembly 300 are all arranged toward the bottom guard plate. This inverted structure not only improves the stability and safety of the battery pack, but also makes the battery pack more flexible and efficient in space utilization. The buffer structure 100 of the present application can also be inverted with the battery cell assembly 300. In this case, the buffer structure 100 can be arranged between the smoke exhaust duct 200 and the bottom guard plate. The buffer structure 100 is located below the battery cell assembly 300.

[0074] Through the above design, the overall structure of the battery pack is more compact and can accommodate more battery cell assemblies 300 in a limited space, thereby improving the energy storage capacity and overall performance of the battery pack.

[0075] In a third aspect, the present application provides an electrical device, comprising a battery pack and a device body as described above, wherein the device body has an assembly cavity, and the battery pack is disposed in the assembly cavity.

[0076] Electrical equipment equipped with the aforementioned battery pack can significantly enhance the smoke exhaust duct's 200 resistance to flue gas impacts through the first reinforcement portion 120, thereby improving the safety and reliability of the corresponding battery pack. Specifically, the two sides of the buffer body 110 tightly abut between the inner wall of the housing 500 and the smoke exhaust duct 200, ensuring effective force transmission in the event of an impact. The first reinforcement portion 120 is disposed on the surface of the buffer body 110, aligned with the explosion-proof valve 310. This design allows the first reinforcement portion 120 to at least partially cover the corresponding outer wall of the smoke exhaust duct 200 impacted by the smoke when the explosion-proof valve 310 releases smoke. When the explosion-proof valve 310 releases smoke, the smoke impacts the inner wall of the smoke exhaust duct 200 with extremely high pressure. This makes the role of the first reinforcement portion 120 particularly important. The first reinforcement portion 120 significantly enhances the smoke exhaust duct's 200 resistance to flue gas impacts, thereby preventing deformation or damage to the smoke exhaust duct 200 due to severe impacts.

[0077] The above-mentioned electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, energy storage equipment, amusement equipment, elevators and lifting equipment, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys or electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.; energy storage equipment can be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment can be carousels, bungee jumping machines, etc. This application does not impose any special restrictions on the above-mentioned electrical equipment.

[0078] The same or similar numbers in the drawings of this application correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0079] The above are only preferred examples of this application and are not intended to limit this application. Any modifications, equivalent replacements and improvements made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A buffer structure, characterized in that: The buffer structure is arranged between the inner wall of the battery pack shell and the smoke exhaust pipe. The side of the smoke exhaust pipe facing away from the inner wall of the shell is provided with a battery cell assembly. The battery cell assembly is provided with an explosion-proof valve adapted to the smoke exhaust pipe. The buffer structure includes: The buffer body has two sides respectively abutting against the inner wall of the shell and the smoke exhaust pipe; at least one first reinforcement portion, disposed on the buffer body, wherein the first reinforcement portion is disposed opposite to the explosion-proof valve; The smoke from the explosion-proof valve impacts the inner wall of the smoke exhaust pipe, and the first reinforcement portion at least partially covers the corresponding outer wall position of the smoke exhaust pipe impacted by the smoke.

2. The buffer structure according to claim 1, wherein: The first reinforcement portion is a thickened structure.

3. The buffer structure according to claim 1, wherein: The first reinforcement portion is at least one of a rubber layer, a silicone layer, a metal sheet, a spring, and a spring.

4. The buffer structure according to claim 1, wherein: The size of the first reinforcement portion is adapted to the size of the explosion-proof valve.

5. The buffer structure according to claim 1, wherein: The stresses in different areas of the smoke exhaust duct are different, and the strength of each part of the buffer structure is proportional to the stress magnitude of the corresponding area of the smoke exhaust duct.

6. The buffer structure according to any one of claims 1 to 5, characterized in that: The buffer structure is configured as a layer structure having at least two layers. The buffer structure includes a first connection layer and a buffer layer. The first connection layer can be connected to the outer peripheral side of the smoke exhaust duct. The buffer layer directly or indirectly abuts against the inner wall of the shell.

7. The buffer structure according to any one of claims 1 to 5, characterized in that: The buffer structure is configured as a layer structure and is provided with at least three layers. The buffer structure includes a first connecting layer, a buffer layer, and a second connecting layer. The first connecting layer can be connected to the outer peripheral side of the smoke exhaust duct, and the second connecting layer can be connected to the inner wall of the shell. The buffer layer is indirectly abutted to the inner wall of the shell through the second connecting layer.

8. The buffer structure according to any one of claims 1 to 5, characterized in that: The buffer structure includes at least one of flue foam, rubber pad, silicone pad, spring, and spring.

9. A battery pack, characterized in that: include: The buffer structure according to any one of claims 1 to 8; and, The shell has a accommodating cavity, and the buffer structure, the battery core assembly and the smoke exhaust pipe are all arranged in the accommodating cavity.

10. An electrical device, characterized in that: include: The battery pack according to claim 9; and, The device body has an assembly cavity, and the battery pack is arranged in the assembly cavity.

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