Battery pack and vehicle

Abstract

The invention provides a battery pack and a vehicle. The battery pack comprises a frame and a battery. A battery bin and a high-voltage bin are formed in the frame. The battery is arranged in the battery bin, and a side channel is formed between the battery and the frame. The frame is provided with a rear beveled edge beam, and a cavity is formed in the rear beveled edge beam. A first opening, a second opening and a third opening are formed in the inner side wall of the rear bevel edge beam. The first opening is communicated with the side channel and the cavity, and the second opening and the third opening face the high-pressure bin. An air outlet is formed in the outer side wall of the rear bevel edge beam. And an exhaust device is arranged in the high-pressure bin. The exhaust device comprises a side channel exhaust pipe fitting and an anti-explosion valve, and the anti-explosion valve is arranged at the air outlet. And the first opening, the cavity, the second opening, the side channel exhaust pipe fitting, the third opening and the anti-explosion valve jointly form a one-way circulating side channel exhaust pipeline. By arranging the one-way circulating side channel exhaust pipeline, airflow flows in a one-way mode and impacts the inner side of the anti-explosion valve, the anti-explosion valve can reach an ideal valve opening state, the exhaust effect is good, and safety is high.

Description

Technical Field

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

[0002] In an era of rapid development of new energy, various vehicles are striving to increase the energy density of battery packs. This corresponds to a gradual reduction in the free space within the battery pack, compressing the exhaust channels and space after thermal runaway of the battery cells. For this reason, many vehicles are utilizing the space within the battery pack's side beams to improve exhaust after thermal runaway of the battery cells, while ensuring the strength of the battery pack. However, after thermal runaway of the battery cells in the exhaust channels at different locations within the battery pack, the gas will flow randomly within the battery pack. Structural and electrical components along the exhaust path may be subjected to two or more high-temperature, high-speed, and airflow shocks, resulting in a high probability of failure.

[0003] At the same time, the structural design of the exhaust channel inside the battery pack is more complex. The gas generated after thermal runaway of the battery has the characteristics of high temperature and high speed, which makes the internal gas flow of the battery pack turbulent and more intense, especially in the narrow areas and bends of the exhaust channel, where the gas turbulence intensity is extremely high. When designing the vehicle body-in-white, the space reserved for the explosion-proof valve of the battery pack is limited. Therefore, the position of the explosion-proof valve on the outside of the battery pack side beam has been solidified, but the inner exhaust surface of the solidified explosion-proof valve is not the main ventilation surface of the exhaust channel. This will make it difficult for the gas to directly impact the inner side of the explosion-proof valve, which is not conducive to the opening of the explosion-proof valve and easily causes the problem of trapped gas inside the battery pack.

[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, including a frame and a battery, wherein the frame is formed with a battery compartment and a high-voltage compartment; the battery is arranged in the battery compartment, and a side channel is formed between the battery and the frame; the frame has a rear oblique side beam, a cavity is provided in the rear oblique side beam, and a first opening, a second opening and a third opening are provided on the inner side wall of the rear oblique side beam, the first opening is connected to the side channel and the cavity, and the second opening and the third opening face the high-voltage compartment; an air outlet is provided on the outer side wall of the rear oblique side beam; an exhaust device is provided in the high-pressure compartment, the exhaust device includes a side channel exhaust pipe and an explosion-proof valve, and the explosion-proof valve is arranged at the air outlet; the first opening, the cavity, the second opening, the side channel exhaust pipe, the third opening and the explosion-proof valve together form a one-way flow side channel exhaust duct.

[0007] Furthermore, the side channel exhaust pipe fitting includes a side channel exhaust pipe, a merging tee and a merging pipe arranged in sequence, and the two ports of the merging tee are respectively connected to the side channel exhaust pipe and the merging pipe; the exhaust device also includes a high-pressure warehouse exhaust assembly, and the high-pressure warehouse exhaust assembly includes a connected gas collector and a first shrinkage tube, and the first shrinkage tube is connected to the other port of the merging tee.

[0008] Furthermore, a side channel exhaust one-way valve is provided between the side channel exhaust pipe and the converging tee; and a high-pressure chamber exhaust one-way valve is provided between the first contraction tube and the converging tee.

[0009] Furthermore, at least one section of flow stabilizing structure is provided in the confluence pipe, and the flow stabilizing structure includes a second contraction pipe, a throat pipe and an expansion pipe which are connected in sequence.

[0010] Furthermore, the cavity includes a first sub-cavity, a second sub-cavity, a third sub-cavity and a fourth sub-cavity stacked from top to bottom; the first opening and the second opening are opened on the side walls of the first sub-cavity, the second sub-cavity and the third sub-cavity, and the third opening and the air outlet are opened on the side walls of the third sub-cavity and the fourth sub-cavity; the side channel exhaust pipe also includes a first adapter and a second adapter, the first adapter is connected to the second opening, and the second adapter is respectively connected to the first adapter and the side channel exhaust pipe.

[0011] Furthermore, the first adapter is flush with the second opening; the second adapter includes a front opening docking with the first adapter and a rear opening docking with the side channel exhaust pipe; the front opening and the rear opening are arranged opposite to each other; the front opening is flush with the first adapter; the rear opening, the side channel exhaust pipe and the third opening are flush with each other.

[0012] Furthermore, a guide block is provided in the merging tee for guiding the gas from the side channel exhaust pipe to the merging pipe.

[0013] Furthermore, the gas collector includes a main body and a guide cavity formed on one side of the main body; the main body is attached to the frame and separates the high-pressure chamber into two non-connected parts, and the side channel exhaust pipe is arranged on a side of the gas collector close to the rear oblique side beam; the guide cavity is arranged on a side of the gas collector away from the rear oblique side beam.

[0014] Furthermore, the exhaust device also includes an expansion diverter pipe and an air outlet adapter; the two ends of the expansion diverter pipe are respectively connected to the converging pipe and the air outlet adapter; the air outlet adapter passes through the third opening and is connected to the explosion-proof valve; the expansion diverter pipe includes a conical diverter column located in the center and an expansion area surrounding the conical diverter column.

[0015] Furthermore, the expansion area is divided into four partitions by four diversion columns; the air outlet adapter has four guide areas; the explosion-proof valve has four air outlets; the four partitions, the four guide areas and the four air outlets are all aligned.

[0016] Furthermore, the frame includes a pair of rear oblique side beams, a front side beam, a rear side beam, a pair of side beams and a rear cross beam. The front side beam, the pair of side beams, the pair of rear oblique side beams and the rear cross beam together form the battery compartment; the rear cross beam, the pair of rear oblique side beams and the rear side beam together form the high-voltage compartment.

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

[0018] By providing a one-way side channel exhaust duct, this application ensures that airflow within the battery pack flows in only one direction, preventing multiple damage to internal structural components and electrical components in the event of thermal runaway of multiple battery cells within the battery pack, resulting in higher safety. Furthermore, airflow through the side channel exhaust duct directly impacts the inside of the explosion-proof valve, creating a uniform impact force that allows the valve to reach an ideal open state, resulting in effective exhaust. 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 assembled partial frame, side channel exhaust pipe, high-pressure chamber exhaust component and battery of this application.

[0021] Figure 3 It is a cross-sectional schematic diagram of a portion of the frame and battery of this application after assembly.

[0022] Figure 4 This is a three-dimensional diagram of the assembled partial frame and battery of this application.

[0023] Figure 5 It is a cross-sectional schematic diagram of the frame and battery of the present application at the first opening after assembly.

[0024] Figure 6 It is a cross-sectional schematic diagram of the frame and battery of the present application at the second opening after assembly.

[0025] Figure 7It is a cross-sectional schematic diagram of the frame and battery of the present application at the third opening after assembly.

[0026] Figure 8 It is a three-dimensional diagram of the assembled side channel exhaust pipe fitting, high-pressure chamber exhaust component and explosion-proof valve of the present application.

[0027] Figure 9 yes Figure 8 A stereogram from another perspective is shown.

[0028] Figure 10 yes Figure 8 Schematic diagram of the decomposition shown.

[0029] Figure 11 This is a schematic diagram of the side channel exhaust pipe and explosion-proof valve after assembly.

[0030] Figure 12 yes Figure 10 A stereoscopic view of the side channel exhaust duct of the battery pack is shown.

[0031] Figure 13 yes Figure 10 A three-dimensional view of the junction tee of the battery pack is shown.

[0032] Figure 14 It is a cross-sectional schematic diagram of the side channel exhaust pipe fitting of the present application.

[0033] Figure 15 It is a cross-sectional view of the confluence pipe of the present application.

[0034] Figure 16 It is a schematic diagram of the exploded side channel exhaust one-way valve of the present application.

[0035] Figure 17 It is a three-dimensional diagram of the second adapter of this application.

[0036] Figure 18 It is a schematic diagram of the explosion-proof valve of the present application.

[0037] Figure 19 It is an exploded schematic diagram of the expansion shunt tube of the present application.

[0038] Figure 20 It is a three-dimensional diagram of the air vent adapter of the present application.

[0039] Explanation of Figure Numbers

[0040] 100, frame; 101, battery compartment; 102, high-voltage compartment; 103, side channel; 10, rear bevel beam; 11, cavity; 111, first sub-cavity; 112, second sub-cavity; 113, third sub-cavity; 114, fourth sub-cavity; 12, first opening; 13, second opening; 14, third opening; 15, air outlet; 20, front side beam; 30, rear side beam; 40, side beam; 50, rear cross beam; 2, side channel exhaust pipe Components; 21, side channel exhaust pipe; 211, first section; 212, second section; 213, expansion section; 22, converging tee; 221, guide block; 222, first port; 223, second port; 224, third port; 23, converging pipe; 231, second contraction pipe; 232, throat pipe; 233, expansion pipe; 24, side channel exhaust check valve; 241, check valve face; 242, check valve spring column; 243, Check valve body; 244, through-hole fan; 245, check valve spring base; 25, first adapter; 26, second adapter; 261, front opening; 262, rear opening; 3, high-pressure chamber exhaust assembly; 31, gas collector; 311, main body; 312, diversion chamber; 32, first shrink tube; 33, high-pressure chamber exhaust check valve; 4, explosion-proof valve; 41, air outlet; 411, 412, 413, 414, sub-outlet Air hole; 42. Explosion-proof valve body; 421. Explosion-proof valve travel hole; 43. Explosion-proof valve cover plate; 44. Explosion-proof valve top cover; 45. Explosion-proof valve travel assembly; 5. Expansion diverter tube; 51. Conical diverter column; 52. Flow expansion area; 521. Four diverter columns; 522. Partition; 6. Air outlet adapter; 601. Adapter section; 602. Straight section; 603. Adapter positioning column; 61. Guide area; 62. Center hole; 200. Battery. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] See also Figure 1 and Figure 2 As shown, the present application provides a battery pack, which includes a frame 100 and a battery 200. A battery compartment 101 and a high-voltage compartment 102 are formed on the frame 100. The frame 100 is a closed frame formed by multiple beams, and the closed frame includes a pair of rear oblique side beams 10, a front side beam 20, a rear side beam 30, a pair of side beams 40 and a rear cross beam 50. Among them, the front side beam 20, a pair of side beams 40, a pair of rear oblique side beams 10 and the rear cross beam 50 together form the battery compartment 101. The rear cross beam 50, a pair of rear oblique side beams 10 and the rear side beam 30 together form the high-voltage compartment 102 to accommodate high-voltage electronic devices.

[0044] In some embodiments, the frame 100 may be an integrally formed structure or a split welded structure.

[0045] The battery 200 is disposed within the battery compartment 101, forming a side channel 103 between the battery 200 and the frame 100. In the illustrated embodiment, the side channel 103 is formed between the battery 200 and the side beam 40. The battery pack also includes an upper sealing plate (not shown) and a lower sealing plate (not shown). Together with the frame 100, the upper and lower sealing plates form two independent compartments within the battery pack. Aside from the exhaust duct, the battery compartment 101 and the high-voltage compartment 102 are not connected to each other.

[0046] See also Figure 3 and Figure 4 As shown, a cavity 11 is defined within the rear bevel beam 10 of the frame 100. A first opening 12, a second opening 13, and a third opening 14 are defined on the inner sidewall of the rear bevel beam 10. The first opening 12 communicates with the side channel 103 and the cavity 11, while the second opening 13 and the third opening 14 face the high-pressure chamber 102. An air outlet 15 is defined on the outer sidewall of the rear bevel beam 10.

[0047] See also Figures 5 to 7 As shown, cavity 11 includes a first sub-cavity 111, a second sub-cavity 112, a third sub-cavity 113, and a fourth sub-cavity 114 stacked from top to bottom. The first sub-cavity 111, the second sub-cavity 112, the third sub-cavity 113, and the fourth sub-cavity 114 are arranged sequentially along the height direction of the rear hypotenuse beam 10. The first opening 12 and the second opening 13 are defined on the sidewalls of the first sub-cavity 111, the second sub-cavity 112, and the third sub-cavity 113. The third opening 14 and the air outlet 15 are also defined on the sidewalls of the third sub-cavity 113 and the fourth sub-cavity 114.

[0048] An exhaust system is installed within the high-pressure chamber 102. The exhaust system includes a side-channel exhaust pipe 2, a high-pressure chamber exhaust assembly 3, and an explosion-proof valve 4. The explosion-proof valve 4 is located at the air outlet 15. The first opening 12, cavity 11, second opening 13, side-channel exhaust pipe 2, third opening 14, and explosion-proof valve 4 together form a one-way side-channel exhaust duct for exhausting gas after a battery cell 200 experiences thermal runaway.

[0049] See also Figures 8 to 12 As shown, the side channel exhaust pipe assembly 2 includes a side channel exhaust pipe 21, a converging tee 22, and a converging pipe 23, which are arranged in sequence. A side channel exhaust check valve 24 is provided between the side channel exhaust pipe 21 and the converging tee 22. The two ports of the converging tee 22 are connected to the side channel exhaust pipe 21 and the converging pipe 23, respectively. The side channel exhaust pipe 21 includes a first section 211, a second section 212, and an expansion section 213, which are perpendicular to each other. The first section 211 and the second section 212 have the same diameter and are perpendicular to each other. The expansion section 213 is trumpet-shaped and gradually increases in diameter relative to the second section 212.

[0050] See also Figure 13 and Figure 14 As shown, a guide block 221 is provided in the converging tee 22 to guide the gas from the side channel exhaust pipe 21 to the converging pipe 23. The high-pressure chamber exhaust assembly 3 includes a gas collector 31 and a first contraction tube 32, which are connected to each other. The first contraction tube 32 is connected to another port of the converging tee 22. The converging tee 22 is provided with three ports, namely a first port 222, a second port 223 and a third port 224. The first port 222 is connected to the first contraction tube 32. The second port 223 is connected to the side channel exhaust pipe 21. The third port 224 is connected to the converging pipe 23. The converging tee 22 realizes the centralized discharge of multiple gases.

[0051] See also Figure 15 As shown, the confluence pipe 23 is provided with two sections of flow stabilization structures. Each section of the flow stabilization structure includes a second contraction pipe 231, a throat pipe 232, and an expansion pipe 233, which are connected in sequence. The second contraction pipe 231 and the expansion pipe 233 are trumpet-shaped, with the contraction ends of the second contraction pipe 231 and the expansion pipe 233 connected to both ends of the throat pipe 232. The diameters of the second contraction pipe 231 and the expansion pipe 233 gradually change along the length of the confluence pipe 23. The diameter of the throat pipe 232 is consistent along its length. The diameter of the throat pipe 232 is less than or equal to the smallest diameter of the second contraction pipe 231 and the expansion pipe 233.

[0052] The second contraction tube 231 collects and concentrates the gas flowing out of the converging tee 22, which then flows into the throat pipe 232 for rectification and even diffusion. The gas passes through the two-stage flow stabilization structure to achieve a stable flow, and the stabilized gas is discharged. In other optional embodiments, the number of flow stabilization structures can be increased or decreased based on the implementation space, and can be provided with one or more stages.

[0053] See also Figure 16 As shown, the side-channel exhaust check valve 24 includes a check valve face 241, a check valve spring column 242, a check valve body 243, and a check valve spring base 245. The check valve face 241 is assembled to one side of the check valve body 243, and the check valve spring column 242 is assembled into the check valve spring base 245. The check valve body 243 is provided with four through-hole sectors 244. These four through-hole sectors 244 are arranged symmetrically around the circumference of the check valve spring base 245.

[0054] Gas flows in from the other side of the check valve body 243 and impacts the check valve spring base 245. The gas pushes the check valve spring column 242 within the check valve spring base 245, which in turn moves the check valve face 241. When the side channel exhaust check valve 24 is closed, the check valve face 241 blocks the four through-hole sectors 244. When the check valve spring column 242 moves the check valve face 241, the check valve face 241 opens the four through-hole sectors 244, and gas flows out of the side channel exhaust check valve 24 through the four through-hole sectors 244.

[0055] The high-pressure chamber exhaust assembly 3 forms a one-way high-pressure chamber exhaust duct via the converging tee 22, converging pipe 23, and explosion-proof valve 4. A high-pressure chamber exhaust check valve 33 is installed between the first contraction pipe 32 and the converging tee 22 to prevent gas from flowing from the first contraction pipe 32 to the converging tee 22. The high-pressure chamber exhaust check valve 33 has the same structure as the side channel exhaust check valve 24.

[0056] In the illustrated embodiment, the side channel exhaust duct and the high-pressure chamber exhaust duct merge at the merging tee 22 and enter the merging pipe 23. In other optional embodiments, the side channel exhaust duct and the high-pressure chamber exhaust duct can also be provided separately.

[0057] According to one embodiment of the present application, the side channel exhaust pipe 2 further includes a first adapter 25 and a second adapter 26. The first adapter 25 is connected to the second opening 13, and the second adapter 26 is connected to the first adapter 25 and the side channel exhaust pipe 21 respectively. The first adapter 25 is flush with the second opening 13. Figure 17As shown, the second adapter 26 includes a front opening 261 that interfaces with the first adapter 25 and a rear opening 262 that interfaces with the side channel exhaust pipe 21. The front opening 261 and rear opening 262 are arranged opposite each other, and the front opening 261 is flush with the first adapter 25. The rear opening 262, the side channel exhaust pipe 21, and the third opening 14 are flush with each other.

[0058] See also Figure 1 、 Figure 9 and Figure 10 As shown, the gas collector 31 includes a main body 311 and a diversion cavity 312 formed on one side of the main body 311. The main body 311 is attached to the frame 100 and separates the high-pressure chamber 102 into two disconnected parts. The side channel exhaust pipe 2 is disposed on the side of the gas collector 31 near the rear bevel beam 10. The diversion cavity 312 is disposed on the side of the gas collector 31 away from the rear bevel beam 10. The gas collector 31 efficiently collects gas within the high-pressure chamber 102 to prevent excessive local pressure.

[0059] In some other embodiments, the gas collector 31 may also be designed as a conical or segmented gas collecting structure according to actual needs.

[0060] See also Figure 18 As shown, the explosion-proof valve 4 includes an explosion-proof valve body 42, an explosion-proof valve cover plate 43, an explosion-proof valve top cover 44, and an explosion-proof valve travel assembly 45. An air outlet 41 is defined in the explosion-proof valve body 42. The explosion-proof valve top cover 44 is assembled with the explosion-proof valve cover plate 43 and is located on one side of the explosion-proof valve body 42. When gas impacts the air outlet 41, the impact force squeezes and pushes open the explosion-proof valve cover plate 43, completing the exhaust. An explosion-proof valve travel hole 421 is defined in the center of the explosion-proof valve body 42. One end of the explosion-proof valve travel assembly 45 extends into the explosion-proof valve travel hole 421 to push the explosion-proof valve cover plate 43.

[0061] The air outlet 41 has a plurality of sub-air outlets, namely, sub-air outlet 411, sub-air outlet 412, sub-air outlet 413, and sub-air outlet 414. Sub-air outlet 411, sub-air outlet 412, sub-air outlet 413, and sub-air outlet 414 are symmetrically arranged. Sub-air outlet 411, sub-air outlet 412, sub-air outlet 413, and sub-air outlet 414 are arranged around the explosion-proof valve entrance hole 421.

[0062] See also Figure 19 and Figure 20 As shown, according to one embodiment of the present application, the exhaust device further includes an expansion diverter pipe 5 and an air outlet adapter 6. The expansion diverter pipe 5 is connected at both ends to the converging pipe 23 and the air outlet adapter 6, respectively. The air outlet adapter 6 passes through the third opening 14 and is connected to the explosion-proof valve 4.

[0063] The expansion diverter tube 5 includes a conical diverter column 51 located in the center and an expansion zone 52 surrounding the conical diverter column 51. The expansion zone 52 is assembled to the conical diverter column 51. The expansion zone 52 is evenly divided into four partitions 522 by four diverter columns 521. The air outlet adapter 6 has four guide areas 61, and a central hole 62 is provided in the middle of the four guide areas 61. The four guide areas 61 are evenly distributed around the circumference of the central hole 62. The four partitions 522, the four guide areas 61, and the four air outlets 41 are all aligned. Each partition 522 corresponds to a guide area 61 and an air outlet 41.

[0064] According to an embodiment of the present application, the gas outlet adapter 6 includes a transition section 601 and a straight section 602. The two ends of the transition section 601 are connected to the expansion shunt tube 5 and the straight section 602, respectively. The other end of the straight section 602 is connected to the explosion-proof valve 4. Both the transition section 601 and the straight section 602 are provided with four guide areas 61 and a center hole 62. The guide areas 61 and center hole 62 on the transition section 601 correspond to those on the straight section 602. Gas flows through the expansion shunt tube 5 and enters the gas outlet adapter 6 from the transition section 601, then flows from the straight section 602 into the explosion-proof valve 4.

[0065] The specific flow path of gas in the battery pack of the present application is as follows: When the battery cells in the side channel 103 of the battery pack thermally run away and produce gas, the high-temperature, high-speed airflow enters the cavity 11 of the rear oblique side beam 10 from the first opening 12 of the side channel 103. Then it enters the first adapter 25, the second adapter 26 and the side channel exhaust pipe 21 in sequence through the second opening 13. After passing through the complex, narrow and long tube structure of the side channel exhaust pipe 21, the high-speed airflow changes its fluid flow state with high turbulence intensity into a steady flow. The steady flow enters the side channel exhaust one-way valve 24, which can ensure one-way flow of the airflow, and prevent the high-pressure incoming gas from flowing back into the side channel 103 after the battery cells in other positions thermally run away, forming secondary damage to the structural parts caused by the airflow.

[0066] The side channel exhaust check valve 24 is installed between the side channel exhaust pipe 21 and the converging tee 22. A guide block 221 is located within the converging tee 22. This guide block 221 partially guides the incoming air from the side channel exhaust pipe 21 toward the explosion-proof valve 4 and prevents some of this air from entering the high-pressure chamber exhaust assembly 3. Furthermore, when air enters the high-pressure chamber exhaust assembly 3, it guides the air toward the explosion-proof valve 4 and prevents some of this air from entering the side channel exhaust pipe 21.

[0067] When a battery cell on the symmetrical side of the inner channel 103 experiences thermal runaway, the gas generated by the cell first enters the high-voltage chamber 102, then passes through the gas collector 31 and the diversion cavity 312 and enters the first shrink tube 32. The X and Z dimensions of the gas collector 31 are designed to be consistent with the inner dimensions of the frame 100, ensuring that all gas generated after thermal runaway can be gradually discharged from the battery pack through the gas collector 31.

[0068] The first shrink tube 32 connected to the gas collector 31 performs rectification and switching functions, transporting the gas to the high-pressure chamber exhaust check valve 33 before entering the converging tee 22. Thermal runaway of the battery cells within the battery pack occurs sequentially, so the gas entering the converging tee 22 can only be a single stream. Both single-stream inlets are equipped with check valves, so the gas reaching these points can only flow into the converging pipe 23. To ensure ideal exhaust conditions when the explosion-proof valve 4 is opened, all components starting from the converging pipe 23 and following it are equipped with flow stabilization or equalization functions.

[0069] The converging pipe 23 is equipped with two-end flow stabilization structures. Each flow stabilization structure includes a second contracting pipe 231, a throat pipe 232, and an expanding pipe 233, which are connected in sequence. These structures are used to address the uneven flow pattern within the long converging pipe 23 and provide a secondary rectification function. The gas then enters the expanding diverter pipe 5, which is equipped with four partitions 522 to ensure that the stabilizing gas flow is evenly divided into four parts. The four fluid interfaces divided by the four diverter columns 521 correspond one-to-one with the four guide areas 61 within the transition section 601 and one-to-one with the four guide areas 61 within the straight section 602.

[0070] In order to seal with the explosion-proof valve 4, an adapter positioning column 603 is provided inside the air outlet adapter 6. The adapter positioning column 603 is accommodated in the central hole 62 in the straight section 602 to ensure that the gas only impacts the explosion-proof valve 4 from the four guide areas 61, thereby achieving the ideal valve-opening and exhausting state of the explosion-proof valve 4.

[0071] The present application also provides a vehicle comprising the above-mentioned battery pack.

[0072] This application provides independent exhaust after thermal runaway of battery cells in different exhaust channels by providing an explosion-proof valve 4 and two one-way valves, thus preventing multiple damage to internal structural components and electrical components of multiple battery cells in the battery pack after thermal runaway, and providing higher safety. At the same time, multiple rectifying structures and a multi-stage fluid distribution design are used to divide the direct gas from the inner side of the explosion-proof valve 4 into four equal parts. Four streams of air with consistent flow patterns impact the inner side of the explosion-proof valve 4, and the uniform impact force causes the explosion-proof valve 4 to reach an ideal valve opening state, achieving a good exhaust effect.

[0073] 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 is formed with a battery compartment and a high-voltage compartment; the battery is arranged in the battery compartment, and a side channel is formed between the battery and the frame; the frame has a rear oblique side beam, a cavity is provided in the rear oblique side beam, and a first opening, a second opening and a third opening are provided on the inner side wall of the rear oblique side beam, the first opening is connected to the side channel and the cavity, and the second opening and the third opening are facing the high-voltage compartment; an air outlet is provided on the outer side wall of the rear oblique side beam; an exhaust device is provided in the high-pressure compartment, the exhaust device includes a side channel exhaust pipe and an explosion-proof valve, and the explosion-proof valve is arranged at the air outlet; the first opening, the cavity, the second opening, the side channel exhaust pipe, the third opening and the explosion-proof valve together form a one-way flow side channel exhaust duct.

2. The battery pack according to claim 1, wherein: The side channel exhaust pipe fitting includes a side channel exhaust pipe, a merging tee and a merging pipe arranged in sequence, and the two ports of the merging tee are respectively connected to the side channel exhaust pipe and the merging pipe; the exhaust device also includes a high-pressure warehouse exhaust assembly, and the high-pressure warehouse exhaust assembly includes a connected gas collector and a first shrinkage tube, and the first shrinkage tube is connected to the other port of the merging tee.

3. The battery pack according to claim 2, wherein: A side channel exhaust one-way valve is provided between the side channel exhaust pipe and the converging tee; a high-pressure chamber exhaust one-way valve is provided between the first shrink tube and the converging tee.

4. The battery pack according to claim 2, wherein: At least one section of flow stabilizing structure is provided in the confluence pipe, and the flow stabilizing structure includes a second contraction pipe, a throat pipe and an expansion pipe which are connected in sequence.

5. The battery pack according to claim 2, wherein: The cavity includes a first sub-cavity, a second sub-cavity, a third sub-cavity and a fourth sub-cavity stacked from top to bottom; the first opening and the second opening are opened on the side walls of the first sub-cavity, the second sub-cavity and the third sub-cavity, and the third opening and the air outlet are opened on the side walls of the third sub-cavity and the fourth sub-cavity; the side channel exhaust pipe also includes a first adapter and a second adapter, the first adapter is connected to the second opening, and the second adapter is respectively connected to the first adapter and the side channel exhaust pipe.

6. The battery pack according to claim 5, characterized in that: The first adapter is flush with the second opening; the second adapter includes a front opening docking with the first adapter and a rear opening docking with the side channel exhaust pipe; the front opening and the rear opening are arranged opposite to each other; the front opening is flush with the first adapter; the rear opening, the side channel exhaust pipe and the third opening are flush with each other.

7. The battery pack according to claim 2, characterized in that: A guide block is provided in the merging tee for guiding the gas from the side channel exhaust pipe to the merging pipe.

8. The battery pack according to claim 2, wherein: The gas collector includes a main body and a guide cavity formed on one side of the main body; the main body is attached to the frame and separates the high-pressure chamber into two non-connected parts, and the side channel exhaust pipe is arranged on a side of the gas collector close to the rear oblique side beam; the guide cavity is arranged on a side of the gas collector away from the rear oblique side beam.

9. The battery pack according to claim 2, wherein: The exhaust device also includes an expansion diverter pipe and an air outlet adapter; the two ends of the expansion diverter pipe are respectively connected to the converging pipe and the air outlet adapter; the air outlet adapter passes through the third opening and is connected to the explosion-proof valve; the expansion diverter pipe includes a conical diverter column located in the center and an expansion area surrounding the conical diverter column.

10. The battery pack according to claim 9, characterized in that: The expansion area is divided into four partitions by four flow-dividing columns; the air outlet adapter has four guide areas; the explosion-proof valve has four air outlets; the four partitions, the four guide areas and the four air outlets are all aligned.

11. The battery pack according to claim 1, wherein: The frame includes a pair of rear oblique side beams, a front side beam, a rear side beam, a pair of side beams and a rear cross beam. The front side beam, the pair of side beams, the pair of rear oblique side beams and the rear cross beam together form the battery compartment; the rear cross beam, the pair of rear oblique side beams and the rear side beam together form the high-voltage compartment.

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

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