Battery pack and vehicle

Abstract

The invention provides a battery pack and a vehicle. The battery pack comprises a frame and a battery. The frame comprises at least one smoke exhaust beam. A plurality of cavities are formed in the smoke exhaust beam and comprise the closed cavity and the smoke exhaust cavity. A smoke inlet and a smoke outlet are formed in the two opposite sides of the smoke exhaust beam, and the smoke exhaust cavity is arranged between the smoke inlet and the smoke outlet. An anti-explosion valve is arranged at the smoke outlet and provided with an anti-explosion valve outlet. The smoke inlet, the smoke exhaust cavity and the anti-explosion valve outlet jointly form a one-way exhaust channel. Through cooperation of the smoke inlet, the smoke exhaust cavity and the explosion-proof valve outlet, the design of the one-way exhaust channel is optimized, the explosion-proof valve can be directly impacted by high-temperature gas generated by thermal runaway of the battery pack, and the valve opening effect of the explosion-proof valve and the exhaust effect of the high-temperature gas are improved. And meanwhile, the arrangement of the one-way exhaust channel can prevent high-temperature and high-speed gas generated after thermal runaway of the battery pack from disorderly flowing in the internal exhaust channel, so that the safety of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to battery packs and vehicles. Background Art

[0002] With the rapid development of the automotive industry, the energy density of battery packs has increased, and this has led to increasingly compact internal space, particularly in the structural design of blade battery packs. When designing the battery pack structure, sufficient space must be left inside the pack to serve as an exhaust channel for thermal runaway cells. Gases generated by thermal runaway are discharged through the exhaust channel and out of the battery pack through the battery pack's explosion-proof valve.

[0003] The compact battery pack design leaves limited space for the explosion-proof valve, resulting in a misaligned design between the exhaust duct and the explosion-proof valve outlet. Furthermore, the narrow space inside the explosion-proof valve outlet complicates the fluid flow pattern inside the valve outlet, resulting in uneven impact forces on the valve's inner surface. This prevents the valve from opening to its ideal state, hindering gas exhaust from the battery pack. This prolonged period of high-temperature gas evacuation from the battery pack deteriorates the internal gas environment of the battery pack after a vehicle's battery cells experience thermal runaway, increasing the risk of thermal diffusion and limiting safety.

[0004] Therefore, it is necessary to provide an improved battery pack and vehicle to solve the above problems. Summary of the Invention

[0005] The present application provides a battery pack and a vehicle with good exhaust effect and high safety.

[0006] The present application provides a battery pack, comprising a frame and a battery, the frame comprising at least one smoke exhaust beam; a plurality of cavities are provided in the smoke exhaust beam, the plurality of cavities comprising a closed cavity and a smoke exhaust cavity, a smoke inlet and a smoke outlet are provided on opposite sides of the smoke exhaust beam, the smoke exhaust cavity is arranged between the smoke inlet and the smoke outlet; an explosion-proof valve is provided at the smoke outlet, the explosion-proof valve having an explosion-proof valve outlet; the smoke inlet, the smoke exhaust cavity and the explosion-proof valve outlet together form a one-way exhaust channel.

[0007] Furthermore, a flow stabilizing structure is provided in the one-way exhaust channel, and the flow stabilizing structure includes at least one of a rectifier tube, a rectifier trough and a honeycomb flow stabilizing block; the rectifier tube and the rectifier trough are arranged in the smoke exhaust cavity.

[0008] Furthermore, the rectifier tube includes a contraction tube, a throat tube and an expansion tube arranged along the length direction of the smoke exhaust cavity and connected in sequence; the contraction tube and the expansion tube are both trumpet-shaped; the contraction tube is arranged close to the smoke inlet, and the expansion tube is arranged away from the smoke inlet.

[0009] Furthermore, the rectifying groove is arranged along the length direction of the smoke exhaust cavity, and the rectifying groove includes a plurality of guide grooves, the inlets of the plurality of guide grooves are arranged close to the smoke inlet, and the outlets of the plurality of guide grooves are arranged close to the explosion-proof valve outlet.

[0010] Furthermore, the multiple guide grooves include multiple outer guide grooves and multiple inner guide grooves, the multiple outer guide grooves and the multiple inner guide grooves each occupy half of the cross-section of the rectifying groove, and the length of the multiple outer guide grooves is smaller than the length of the multiple inner guide grooves; the outlets of the multiple outer guide grooves form outer outlets, and the outlets of the multiple inner guide grooves form inner outlets; the explosion-proof valve outlet has multiple sub-outlets, and the multiple sub-outlets are symmetrically arranged along the length direction of the smoke exhaust cavity; the inner outlet and the outer outlet are respectively aligned with one of the sub-outlets.

[0011] Furthermore, the honeycomb flow stabilizing block is arranged in the closed cavity, and the honeycomb flow stabilizing block is connected to the smoke exhaust cavity and the explosion-proof valve outlet; the honeycomb flow stabilizing block is disc-shaped and has a plurality of honeycomb outlet areas symmetrically arranged along the circumferential direction, and the explosion-proof valve outlet has a plurality of sub-outlets, and the plurality of honeycomb outlet areas are respectively aligned with the plurality of sub-outlets.

[0012] Furthermore, the flow stabilizing structure includes an exhaust column arranged in the smoke exhaust cavity, and the exhaust column is arranged along the length direction of the smoke exhaust cavity; the rectifier tube and the rectifier groove are arranged on the exhaust column in sequence, the rectifier tube is close to the smoke inlet, and the rectifier groove is close to the smoke outlet; the two ends of the exhaust column block the smoke exhaust cavity; the exhaust column is provided with a guide groove connected to the smoke inlet.

[0013] Furthermore, the closed cavity includes an upper cavity, and the smoke exhaust cavity and the upper cavity are arranged side by side on the inner and outer sides of the smoke exhaust beam; the smoke exhaust cavity includes an upper sub-cavity, a middle sub-cavity and a lower sub-cavity that are stacked, and the middle sub-cavity and the lower sub-cavity are respectively provided with an exhaust column; the upper sub-cavity accommodates an upper blocking column; the upper cavity is provided with a front blocking column, and the front blocking column is provided with a through hole connecting the smoke outlet with the middle sub-cavity and the lower sub-cavity.

[0014] Furthermore, the smoke inlet is opened on the side walls of the upper sub-cavity, the middle sub-cavity and the lower sub-cavity, and the upper blocking column is provided with a guide groove connected to the smoke inlet; the smoke outlet is opened on the side wall of the upper cavity and its height is aligned with the middle sub-cavity and the lower sub-cavity.

[0015] Furthermore, the closed cavity further includes a middle cavity and a lower cavity, the middle cavity and the lower cavity are stacked, and the upper cavity and the smoke exhaust cavity are arranged above the middle cavity.

[0016] Furthermore, the frame is a closed structure; the smoke exhaust beam forms the front side beam of the frame, and each side of the front side beam has a one-way exhaust channel, and the one-way exhaust channels are not connected to each other; each smoke inlet is arranged near the end of the front side beam, and each smoke outlet is arranged near the middle of the front side beam compared to the corresponding smoke inlet.

[0017] The present application also provides a vehicle comprising the above-mentioned battery pack.

[0018] This application optimizes the design of the one-way exhaust passage by coordinating the smoke inlet, exhaust cavity, and explosion-proof valve outlet. This facilitates direct impact of high-temperature gases generated by thermal runaway of the battery pack on the explosion-proof valve, improving the valve opening efficiency and the exhaust efficiency of high-temperature gases. Furthermore, the one-way exhaust passage prevents the high-temperature, high-speed gases generated by thermal runaway from flowing turbulently within the internal exhaust passage, thereby improving battery pack safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the battery pack of this application.

[0020] Figure 2 This is a three-dimensional diagram of the smoke exhaust beam and explosion-proof valve of the battery pack of this application after assembly.

[0021] Figure 3 yes Figure 2 The exploded diagram of the smoke exhaust beam and explosion-proof valve is shown.

[0022] Figure 4 yes Figure 2 A stereogram from another perspective is shown.

[0023] Figure 5 It is a three-dimensional diagram of the smoke exhaust beam of the battery pack of this application.

[0024] Figure 6 This is a schematic diagram of the exploded smoke exhaust beam and explosion-proof valve of the battery pack of this application.

[0025] Figure 7 yes Figure 2 Schematic diagram of the explosion-proof valve of the battery pack shown.

[0026] Figure 8 It is a three-dimensional view of the exhaust column of the battery pack of the present application.

[0027] Figure 9 yes Figure 8 A perspective view of the exhaust column from another perspective is shown.

[0028] Figure 10 yes Figure 8 A top view of the exhaust column is shown.

[0029] Figure 11 yes Figure 8 A cross-sectional view of the exhaust column is shown.

[0030] Figure 12 It is a schematic diagram of the honeycomb flow stabilizing block of the battery pack of the present application.

[0031] Figure 13 yes Figure 2 The cross-sectional view of the smoke exhaust beam and explosion-proof valve at the rectifier trough after assembly is shown.

[0032] Figure 14 yes Figure 2 The cross-sectional view of the smoke exhaust beam and explosion-proof valve at the honeycomb flow stabilizing block after assembly is shown.

[0033] Figure 15 yes Figure 2 The cross-sectional view of the smoke exhaust beam and explosion-proof valve at the blocking block after assembly is shown.

[0034] Explanation of Figure Numbers

[0035] 1. Frame; 101. Rear side beam; 102. Side beam; 103. Rear oblique side beam; 104. Rear cross beam; 105. Battery compartment; 106. High-voltage compartment; 2. Battery; 10. Smoke exhaust beam; 11. Enclosed cavity; 111. Upper cavity; 1111. Partition wall; 1112. Opening; 112. Middle cavity; 113. Lower cavity; 12. Smoke exhaust cavity; 121. Upper sub-cavity; 122. Middle sub-cavity; 123. Lower sub-cavity; 13. Smoke inlet; 14. Smoke outlet; 20. Explosion-proof valve; 21. Explosion-proof valve outlet; 211, 212, 213, 214, sub-outlets; 22. Explosion-proof valve body; 221. Explosion-proof valve entry hole ; 23. Explosion-proof valve cover; 24. Explosion-proof valve top cover; 25. Explosion-proof valve travel assembly; 30. Exhaust column; 301. Guide groove; 3011. Arc-shaped guide surface; 302, 303. Arc-shaped guide surface; 31. Upper blocking column; 311. Guide groove; 32. First exhaust column; 33. Second exhaust column; 40. Rectifier tube; 41. Contraction tube; 42. Throat; 43. Expansion tube; 50. Rectifier groove; 51. Outer guide groove; 52. Inner guide groove; 53. Outer outlet; 54. Inner outlet; 60. Honeycomb flow stabilizing block; 61, 62, 63, 64. Honeycomb outlet area; 65. Matching hole; 70. Front blocking column; 71. Perforation; 80. Block. DETAILED DESCRIPTION

[0036] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0037] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0038] See also Figures 1 to 4 As shown, the present application provides a battery pack, including a frame 1 and a battery 2. The frame 1 is a closed frame formed by multiple beams, which includes at least one smoke exhaust beam 10, which can be used to exhaust after the battery cell of the battery 2 produces thermal runaway.

[0039] Specifically, the frame 1 includes a smoke exhaust beam 10, a rear side beam 101, a pair of side beams 102, a rear oblique side beam 103, and a rear cross beam 104. The smoke exhaust beam 10, the pair of side beams 102, the pair of rear oblique side beams 103, and the rear cross beam 104 collectively form a battery compartment 105 for accommodating the battery 2. The rear cross beam 104, the pair of rear oblique side beams 103, and the rear side beam 101 collectively form a high-voltage compartment 106 for accommodating high-voltage electronic components.

[0040] The battery pack also includes an upper sealing plate (not shown) and a lower sealing plate (not shown), which together with the frame 1 form two independent spaces within the battery pack. Except for the smoke exhaust channel, the battery compartment 105 and the high-voltage compartment 106 are not connected to each other.

[0041] See also Figure 5 and Figure 6 As shown, the smoke exhaust beam 10 is provided with multiple cavities, including an enclosed cavity 11 and a smoke exhaust cavity 12. At least a section, or the entirety, of the smoke exhaust cavity 12 forms part of the smoke exhaust passage; in contrast, the enclosed cavity 11 does not participate in smoke exhaust as part of the passage. A smoke inlet 13 and a smoke outlet 14 are provided on opposite sides of the smoke exhaust beam 10, with the smoke exhaust cavity 12 located between them.

[0042] The enclosed cavity 11 includes an upper cavity 111, with the smoke exhaust cavity 12 positioned side by side with the upper cavity 111 on the inner and outer sides of the smoke exhaust beam 10. The enclosed cavity 11 also includes a middle cavity 112 and a lower cavity 113, which are stacked. The upper cavity 111 and the smoke exhaust cavity 12 are positioned above the middle cavity 112.

[0043] The smoke exhaust chamber 12 comprises a stacked upper sub-chamber 121, a middle sub-chamber 122, and a lower sub-chamber 123. A smoke inlet 13 is provided on the sidewalls of the upper, middle, and lower sub-chambers 121, 122, and 123. A smoke outlet 14 is provided on the sidewall of the upper chamber 111 and is aligned with the middle and lower sub-chambers 122, 123.

[0044] Please also see Figure 7 As shown, an explosion-proof valve 20 is provided at the smoke outlet 14. The explosion-proof valve 20 has an explosion-proof valve outlet 21. The explosion-proof valve outlet 21 has multiple sub-outlets, namely, a sub-outlet 211, a sub-outlet 212, a sub-outlet 213, and a sub-outlet 214. The sub-outlets 211, 212, 213, and 214 are symmetrically arranged along the length of the smoke exhaust cavity 12.

[0045] The explosion-proof valve 20 includes an explosion-proof valve body 22, an explosion-proof valve cover plate 23, an explosion-proof valve top cover 24 and an explosion-proof valve travel assembly 25. The explosion-proof valve outlet 21 is provided on the explosion-proof valve body 22. The explosion-proof valve top cover 24 is assembled with the explosion-proof valve cover plate 23 and is provided on one side of the explosion-proof valve body 22. When the flue gas impacts the explosion-proof valve outlet 21, the impact force squeezes and pushes open the explosion-proof valve cover plate 23 to complete the exhaust. An explosion-proof valve travel hole 221 is provided in the middle of the explosion-proof valve body 22, and one end of the explosion-proof valve travel assembly 25 extends into the explosion-proof valve travel hole 221 to push the explosion-proof valve cover plate 23. According to an embodiment of the present application, the sub-outlet 211, sub-outlet 212, sub-outlet 213 and sub-outlet 214 are evenly arranged around the explosion-proof valve travel hole 221.

[0046] The flue gas inlet 13, the exhaust chamber 12, and the explosion-proof valve outlet 21 together form a one-way exhaust channel. This ensures that the high-temperature gas generated by thermal runaway can flow in a directional manner, avoiding difficulty in opening the explosion-proof valve 20 due to turbulent airflow. A flow stabilization structure is provided within the one-way exhaust channel. The flow stabilization structure can switch the high-temperature, high-speed gas from a turbulent flow state to a steady flow state within the one-way exhaust channel, reducing the impact and fluctuation of the airflow on the explosion-proof valve 20. The flow stabilization structure includes at least one of a rectifier tube 40, a rectifier trough 50, and a honeycomb flow stabilization block 60, ensuring uniform airflow distribution and improving the opening stability of the explosion-proof valve 20.

[0047] Figures 8 to 12The illustrated embodiment incorporates all three of the aforementioned flow stabilization structures. A rectifier tube 40 and a rectifier trough 50 are disposed within the exhaust cavity 12. A honeycomb flow stabilization block 60 is disposed within the enclosed cavity 11. Specifically, the flow stabilization structure also includes an exhaust column 30 disposed within the exhaust cavity 12, extending along the length of the cavity 12.

[0048] The rectifier tube 40 and rectifier trough 50 are sequentially mounted on the exhaust column 30. The rectifier tube 40 is located near the smoke inlet 13, and the rectifier trough 50 is located near the smoke outlet 14. The exhaust column 30 is provided with a guide trough 301 that communicates with the smoke inlet 13. Both ends of the exhaust column 30 block the exhaust cavity 12, allowing gas to flow only through the guide trough 301.

[0049] The upper sub-chamber 121 houses an upper blocking column 31. The exhaust column 30 includes a first exhaust column 32 and a second exhaust column 33 of identical structure. The middle sub-chamber 122 and the lower sub-chamber 123 each contain a first exhaust column 32 and a second exhaust column 33. The upper blocking column 31 is provided with a guide groove 311 that communicates with the smoke inlet 13. Figure 5 In the embodiment shown, the guide groove 301 and the guide groove 311 are both connected to the smoke inlet 13, and the smoke enters the smoke exhaust cavity 12. The guide groove 301 also has an arc-shaped guide surface 3011 to further guide the smoke into the steady flow structure.

[0050] In some other embodiments, the number of exhaust columns can be set based on the structure of the smoke exhaust cavity and its sub-cavities. When the smoke exhaust cavity does not include a sub-cavity, there is only one exhaust column, which is housed within the smoke exhaust cavity. When the smoke exhaust cavity includes multiple sub-cavities, each sub-cavity can have an exhaust column. Furthermore, the smoke inlet can be located on the sidewall of one or more sub-cavities.

[0051] See also Figure 11 As shown, the rectifier tube 40 includes a contraction tube 41, a throat tube 42, and an expansion tube 43, which are arranged along the length of the smoke exhaust chamber 12 and are sequentially connected. Both the contraction tube 41 and the expansion tube 43 are trumpet-shaped. The contraction ends of the contraction tube 41 and the expansion tube 43 are connected to both ends of the throat tube 42, and the trumpet ends of the contraction tube 41 and the expansion tube 43 are away from the throat tube 42. The contraction tube 41 is located near the smoke inlet 13, and the expansion end of the contraction tube 41 is located near the smoke inlet 13 and faces the diversion groove 301. The expansion tube 43 is located away from the smoke inlet 13, and the expansion end of the expansion tube 43 faces the rectifier groove 50.

[0052] According to an embodiment of the present application, the diameter of the contraction tube 41 gradually decreases along the length of the smoke exhaust cavity 12. The diameter of the expansion tube 43 gradually increases along the length of the smoke exhaust cavity 12. The diameter of the throat tube 42 remains constant along the length of the smoke exhaust cavity 12. The throat tube 42 is connected between the contraction tube 41 and the expansion tube 43. The diameter of the throat tube 42 is less than or equal to the smallest diameter of the contraction tube 41 and the expansion tube 43. The contraction tube 41 collects and accelerates the airflow, the throat tube 42 stabilizes its flow rate, and the expansion tube 43 evenly disperses the fluid, achieving an optimized flow pattern.

[0053] In some other embodiments, a two-stage combination from gradually contracting to gradually expanding may be directly adopted to replace the three-stage combination of the contraction tube 41 , the throat tube 42 , and the expansion tube 43 .

[0054] The rectifying groove 50 is arranged along the length direction of the smoke exhaust cavity 12, the inlet of the rectifying groove 50 is connected to the expansion tube 43, and the outlet of the rectifying groove 50 is connected to the smoke outlet 14. The rectifying groove 50 includes a plurality of guide grooves, the inlet of the guide groove is arranged near the smoke inlet 13, and the outlet of the guide groove is arranged near the smoke outlet 14 and the explosion-proof valve outlet 21. The multiple guide grooves divide the airflow into multiple independent flows to avoid mutual interference. The guide groove includes a plurality of outer guide grooves 51 and a plurality of inner guide grooves 52. The outer guide groove 51 and the plurality of inner guide grooves 52 form an outer rectifying area and an inner rectifying area in the smoke exhaust cavity 12, and perform diversion at the same time.

[0055] The length of the multiple outer guide grooves 51 is shorter than the length of the multiple inner guide grooves 52. The outlets of the multiple outer guide grooves 51 form outer outlets 53, and the outlets of the multiple inner guide grooves 52 form inner outlets 54. The outer outlet 53 and inner outlet 54 on the first exhaust column 32 are aligned with the sub-outlet 211 and sub-outlet 214, respectively. The outer outlet 53 and inner outlet 54 on the second exhaust column 33 are aligned with the sub-outlet 212 and sub-outlet 213, respectively.

[0056] According to the embodiment of the present application, the multiple outer guide grooves 51 and the multiple inner guide grooves 52 each occupy half the cross-section of the rectifying groove 50. The smoke enters the contraction tube 41, passes through the throat 42, and is discharged from the expansion tube 43. The smoke is then evenly divided into two parts by the rectifying groove 50 on the exhaust column 30, and enters the multiple outer guide grooves 51 and the multiple inner guide grooves 52 respectively. At the same time, the exhaust column 30 includes a first exhaust column 32 and a second exhaust column 33, and the smoke is divided into four streams of gas with consistent fluid flow patterns. The four streams of gas with consistent fluid flow patterns can evenly impact the explosion-proof valve opening 21, allowing the explosion-proof valve 20 to reach an ideal valve-open exhaust state.

[0057] The outer outlet 53 and the inner outlet 54 are further provided with arcuate guide surfaces 302 and 303. The arcuate guide surface 302 can guide the gas discharged from the multiple outer guide grooves 51 to the sub-outlets 211 and 212. The arcuate guide surface 303 can guide the gas discharged from the multiple inner guide grooves 52 to the sub-outlets 213 and 214.

[0058] See also Figure 12 As shown, the honeycomb flow stabilizing block 60 connects the smoke exhaust cavity 12 and the explosion-proof valve outlet 21. The honeycomb flow stabilizing block 60 is disc-shaped and has multiple honeycomb outlet areas symmetrically arranged along the circumference, namely honeycomb outlet area 61, honeycomb outlet area 62, honeycomb outlet area 63, and honeycomb outlet area 64. The multiple honeycomb outlet areas are aligned with the multiple sub-outlets. Specifically, honeycomb outlet area 61 is aligned with sub-outlet 211, honeycomb outlet area 62 is aligned with sub-outlet 212, honeycomb outlet area 63 is aligned with sub-outlet 213, and honeycomb outlet area 64 is aligned with sub-outlet 214, ensuring that the airflow directly impacts the effective valve opening area of ​​the explosion-proof valve 20.

[0059] According to an embodiment of the present application, a mating hole 65 is further provided in the center of the honeycomb flow stabilizing block 60. Honeycomb outlet areas 61, 62, 63, and 64 are arranged around mating hole 65. The other end of the explosion-proof valve travel assembly 25 extends into mating hole 65 to assemble the explosion-proof valve 20 and the honeycomb flow stabilizing block 60. The honeycomb outlet area is provided with multiple grid holes for exhaust, and can also be provided with a number of circular holes to achieve a similar flow stabilization effect.

[0060] See also Figures 13 to 15 As shown, a front blocking column 70 is provided in the upper cavity 111. The front blocking column 70 is provided with a through hole 71 connecting the smoke outlet 14 with the middle sub-cavity 122 and the lower sub-cavity 123. According to an embodiment of the present application, a blocking block 80 is also provided in the upper cavity 111. The blocking block 80 and the front blocking column 70 are arranged in sequence along the length direction of the upper cavity 111. There is a partition wall 1111 between the upper cavity 111 and the smoke exhaust cavity 12, and an opening 1112 is provided on the partition wall 1111, and the opening 1112 connects the upper cavity 111 and the smoke exhaust cavity 12. The blocking block 80 blocks the opening 1112 to prevent smoke from entering the upper cavity 111 from the smoke exhaust cavity 12 through the opening 1112.

[0061] In the illustrated embodiment, a smoke exhaust beam 10 forms the front edge of the frame 1. A one-way exhaust channel is provided on each side of the front edge, and the one-way exhaust channels are not interconnected. Each smoke inlet 13 is positioned near the end of the front edge, while each smoke outlet 14 is positioned closer to the center of the front edge relative to the corresponding smoke inlet 13. Thus, a smoke inlet 13 is formed on each side of the front edge, and the gas flowing into each smoke inlet 13 is discharged through the corresponding one-way exhaust channel, eliminating cross-flow and interference between the two.

[0062] In other embodiments, the smoke exhaust beam 10 may also be a side beam at other positions to exhaust the battery cells 2 at the corresponding positions.

[0063] The specific exhaust steps for the battery pack of this application are as follows: When a battery cell in the battery pack experiences thermal runaway, high-temperature, dangerous, and high-velocity gas is generated. This gas enters the exhaust cavity 12 of the exhaust beam 10 through the flue gas inlet 13. Specifically, the gas enters the upper blocking column 31 through the flue gas inlet 13 and is then introduced into the first and second exhaust columns 32, 33 through the guide grooves 311. The first and second exhaust columns 32, 33 have the same structural design and the gas flows through the same route.

[0064] Gas is introduced into the guide groove 301 through the guide groove 311. Due to the presence of the curved guide surface 3011, the gas is restricted to flow along the length of the exhaust column 30 and into the rectifier tube 40. Before entering the smoke exhaust beam 10 and within the guide groove 301, the gas exhibits a complex and turbulent flow pattern. Upon entering the contraction tube 41, the gas is forced to merge and converge. It then passes through the throat 42 for rectification, forming a fluid flow pattern. After rectification, the gas enters the expansion tube 43, where it is evenly dispersed. At this point, the fluid flow pattern within the exhaust column 30 has achieved steady flow characteristics after this initial rectification.

[0065] After exiting the expansion tube 43, the stabilizing gas is divided into two streams, each entering the outer and inner guide grooves 51 and 52 for secondary rectification. Multiple outer and inner guide grooves 51 and 52 enhance the stabilizing effect and provide uniform distribution. The divided fluid enters the outer outlet 53 and inner outlet 54, where it is evenly distributed through the curved guide surface 302 and directed into the sub-outlets 211 and 212, respectively. Furthermore, it is evenly distributed through the guide surface 303 and directed into the sub-outlets 213 and 214. The gas flows through the rectifying grooves 50, splitting into four streams and achieving secondary flow stabilization and diversion for the smoke exhaust beam 10.

[0066] The honeycomb flow stabilizing block 60 is provided with a matching hole 65 to ensure that the honeycomb flow stabilizing block 60 is fully matched with the explosion-proof valve 20, so as to ensure that the gas only flows from the honeycomb flow stabilizing block 60 to the explosion-proof valve 20. The honeycomb flow stabilizing block 60 has both flow stabilization and flow diversion functions. The four streams of fluid divided by the flow stabilization flow respectively flow to the inner side of the explosion-proof valve cover plate 23 through the honeycomb outlet area 61, the honeycomb outlet area 62, the honeycomb outlet area 63 and the honeycomb outlet area 64. The explosion-proof valve cover plate 23, which is impacted by the gas, moves outward to complete the opening and exhaust functions of the explosion-proof valve 20. If the inner side of the explosion-proof valve cover plate 23 is unevenly impacted by the gas at this time, the explosion-proof valve 20 may not open or may not reach the ideal valve opening state.

[0067] The present application also provides a vehicle comprising the above-mentioned battery pack. According to an embodiment of the present application, the battery pack is a blade battery pack.

[0068] This application utilizes a one-way exhaust channel design to allow high-temperature gases generated by thermal runaway of the battery pack to directly impact the explosion-proof valve 20, improving both the valve opening efficiency of the explosion-proof valve 20 and the exhaust efficiency of the high-temperature gases. Furthermore, by providing three flow-stabilizing structures, the high-speed gas flows from a turbulent to a steady flow state when it reaches the inner area of ​​the explosion-proof valve 20. The steady flow of gas evenly impacts the explosion-proof valve 20, achieving the ideal valve-opening exhaust state for the explosion-proof valve 20 and enhancing safety.

[0069] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A battery pack, characterized in that: It includes a frame and a battery, the frame includes at least one smoke exhaust beam; a plurality of cavities are provided in the smoke exhaust beam, the plurality of cavities include a closed cavity and a smoke exhaust cavity, a smoke inlet and a smoke outlet are provided on opposite sides of the smoke exhaust beam, and the smoke exhaust cavity is arranged between the smoke inlet and the smoke outlet; an explosion-proof valve is provided at the smoke outlet, and the explosion-proof valve has an explosion-proof valve outlet; the smoke inlet, the smoke exhaust cavity and the explosion-proof valve outlet together form a one-way exhaust channel.

2. The battery pack according to claim 1, wherein: A flow stabilizing structure is provided in the one-way exhaust channel, and the flow stabilizing structure includes at least one of a rectifier tube, a rectifier trough and a honeycomb flow stabilizing block; the rectifier tube and the rectifier trough are arranged in the smoke exhaust cavity.

3. The battery pack according to claim 2, wherein: The rectifier tube includes a contraction tube, a throat tube and an expansion tube which are arranged along the length direction of the smoke exhaust cavity and are connected in sequence; the contraction tube and the expansion tube are both trumpet-shaped; the contraction tube is arranged close to the smoke inlet, and the expansion tube is arranged away from the smoke inlet.

4. The battery pack according to claim 2, wherein: The rectifying groove is arranged along the length direction of the smoke exhaust cavity, and the rectifying groove includes a plurality of guide grooves, the inlets of the plurality of guide grooves are arranged close to the smoke inlet, and the outlets of the plurality of guide grooves are arranged close to the explosion-proof valve outlet.

5. The battery pack according to claim 4, characterized in that: The multiple guide grooves include multiple outer guide grooves and multiple inner guide grooves, the multiple outer guide grooves and the multiple inner guide grooves each occupy half of the cross-section of the rectifying groove, and the length of the multiple outer guide grooves is smaller than the length of the multiple inner guide grooves; the outlets of the multiple outer guide grooves form outer outlets, and the outlets of the multiple inner guide grooves form inner outlets; the explosion-proof valve outlet has multiple sub-outlets, and the multiple sub-outlets are symmetrically arranged along the length direction of the smoke exhaust cavity; the inner outlet and the outer outlet are respectively aligned with one of the sub-outlets.

6. The battery pack according to claim 2, characterized in that: The honeycomb flow stabilizing block is arranged in the closed cavity, and the honeycomb flow stabilizing block is connected to the smoke exhaust cavity and the explosion-proof valve outlet; the honeycomb flow stabilizing block is disc-shaped and has multiple honeycomb outlet areas arranged symmetrically along the circumference, and the explosion-proof valve outlet has multiple sub-outlets, and the multiple honeycomb outlet areas are respectively aligned with the multiple sub-outlets.

7. The battery pack according to claim 2, characterized in that: The flow stabilizing structure includes an exhaust column arranged in the smoke exhaust cavity, and the exhaust column is arranged along the length direction of the smoke exhaust cavity; the rectifier tube and the rectifier groove are arranged on the exhaust column in sequence; the rectifier tube is close to the smoke inlet, and the rectifier groove is close to the smoke outlet; the two ends of the exhaust column block the smoke exhaust cavity; the exhaust column is provided with a guide groove connected to the smoke inlet.

8. The battery pack according to claim 7, characterized in that: The closed cavity includes an upper cavity, and the smoke exhaust cavity and the upper cavity are arranged side by side on the inner and outer sides of the smoke exhaust beam; the smoke exhaust cavity includes an upper sub-cavity, a middle sub-cavity and a lower sub-cavity that are stacked, and the middle sub-cavity and the lower sub-cavity are respectively provided with an exhaust column; the upper sub-cavity accommodates an upper blocking column; the upper cavity is provided with a front blocking column, and the front blocking column is provided with a through hole connecting the smoke outlet with the middle sub-cavity and the lower sub-cavity.

9. The battery pack according to claim 8, characterized in that: The smoke inlet is opened on the side walls of the upper sub-cavity, the middle sub-cavity and the lower sub-cavity, and the upper blocking column is provided with a guide groove connected to the smoke inlet; the smoke outlet is opened on the side wall of the upper cavity and its height is aligned with the middle sub-cavity and the lower sub-cavity.

10. The battery pack according to claim 8, wherein: The closed cavity further includes a middle cavity and a lower cavity, the middle cavity and the lower cavity are stacked, and the upper cavity and the smoke exhaust cavity are arranged above the middle cavity.

11. The battery pack according to claim 1, wherein: The frame is a closed structure; the smoke exhaust beam forms the front side beam of the frame, and each side of the front side beam has a one-way exhaust channel, and the one-way exhaust channels are not connected to each other; each smoke inlet is arranged near the end of the front side beam, and each smoke outlet is arranged near the middle of the front side beam compared to the corresponding smoke inlet.

12. A vehicle, characterized in that: Comprising the battery pack according to any one of claims 1 to 11.

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