Battery box, battery pack and vehicle

Abstract

The utility model relates to the field of batteries, and discloses a battery box, a battery pack and a vehicle. The battery box comprises a frame. A containing chamber used for containing a battery is defined by the frame, a cavity is formed in the frame, a screen structure is arranged on the surface of the side, close to the containing chamber, of the frame, screen holes of the screen structure communicate with the containing chamber and the cavity, an exhaust port is formed in the surface of the side, away from the containing chamber, of the frame and communicates with the cavity, and the exhaust port faces the cavity along the direction of the exhaust port. The projection of the exhaust port on the plane where the screen structure is located at least partially coincides with the screen structure. The screen structure is arranged on the surface, close to the containing chamber, of the frame, gas in the eruption matter can be allowed to be exhausted through the screen structure, the cavity of the frame and the exhaust port, the filtering and blocking effect on solid matter in the eruption matter can be achieved, the probability that the solid matter in the combustion state is exhausted is reduced, and the risk that the solid matter ignites combustible matter in the environment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery boxes, battery packs, and vehicles. Background Technology

[0002] With the increasing prevalence of electric vehicles and energy storage systems, battery safety has become a growing concern. As a core component of electric vehicles and energy storage systems, the safety of the battery pack directly affects the stability and reliability of the entire system. Therefore, venting and depressurizing the battery pack is a crucial consideration in its safety design.

[0003] In battery pack design, the internal structure of the casing frame typically includes an exhaust channel. One end of the exhaust channel connects to the containment chamber enclosed by the casing frame, while the other end is located on the outer surface of the casing frame. In the event of thermal runaway, the exhaust channel can promptly expel the ejected material generated by the battery, preventing excessive pressure or temperature within the containment chamber from leading to more serious safety incidents.

[0004] However, the ejected material generated during battery thermal runaway, especially those in a burning state, may ignite flammable materials in the external environment after being ejected from the exhaust channel, thus causing a fire. Utility Model Content

[0005] In view of this, the present invention provides a battery box, a battery pack, and a vehicle to solve or improve the problem that ejected material generated during battery thermal runaway may ignite flammable materials after being ejected from the exhaust channel.

[0006] In a first aspect, this utility model provides a battery box, including a frame;

[0007] The frame encloses a housing chamber for accommodating the battery. The interior of the frame has a cavity. A screen structure is provided on the surface of the frame near the housing chamber. The screen structure connects the housing chamber and the cavity. An exhaust port is provided on the surface of the frame away from the housing chamber. The exhaust port is connected to the cavity. Along the orientation of the exhaust port, the projection of the exhaust port onto the plane of the screen structure at least partially coincides with the screen structure.

[0008] In one optional embodiment, the surface of the frame near the receiving chamber is further provided with an exhaust hole, the exhaust hole connecting the receiving chamber and the cavity, the exhaust hole being spaced apart from the screen structure, and the aperture of the exhaust hole being larger than the aperture of the screen structure.

[0009] In one optional embodiment, the battery box further includes a partition member disposed within the cavity. One end of the partition member is sealed to the side wall of the cavity near the receiving chamber, and the other end is sealed to the side wall of the cavity away from the receiving chamber. The partition member separates an exhaust chamber within the cavity, and the exhaust chamber connects the exhaust port and the screen structure.

[0010] In one alternative implementation, the frame includes a base plate assembly and side beam assemblies;

[0011] The side beam assembly is arranged around the circumferential edge of the base plate assembly and together with the base plate assembly forms the receiving chamber. The cavity is at least located inside the side beam assembly. The screen structure and the vent are both located on the side beam assembly.

[0012] In one alternative embodiment, the frame further includes partition beams;

[0013] The partition beam is located in the housing and divides the housing into a battery room and an electrical room. The partition beam is provided with a connecting channel for connecting the battery room and the electrical room. The screen structure is located in the battery room or the electrical room.

[0014] In one alternative embodiment, the battery box has intersecting first and second directions, and the side beam assembly includes a first side beam, a second side beam, and a diagonal beam.

[0015] Wherein, the first side beam extends along the first direction, the second side beam extends along the second direction, the first side beam is connected to the second side beam through the inclined beam, the inclined beam is inclined relative to the first direction and the second direction, the cavity includes a first cavity disposed inside the inclined beam, the screen structure and the exhaust port are both disposed on the inclined beam and are both connected to the first cavity.

[0016] In an optional embodiment, the cavity further includes a second cavity disposed inside the first side beam, the second cavity communicating with the first cavity, and an exhaust hole provided on the surface of the first side beam near the receiving chamber, the exhaust hole communicating with the second cavity, the diameter of the exhaust hole being larger than the sieve hole diameter of the screen structure;

[0017] And / or, the cavity further includes a third cavity disposed inside the second side beam, the third cavity communicating with the first cavity, and an exhaust hole provided on the surface of the second side beam near the receiving chamber, the exhaust hole communicating with the third cavity, the diameter of the exhaust hole being larger than the sieve hole diameter of the screen structure.

[0018] In one alternative embodiment, the battery box further includes an explosion-proof valve installed at the vent.

[0019] Secondly, the present invention also provides a battery pack, including a battery and a battery box as described above, wherein the battery is disposed in the receiving chamber.

[0020] Thirdly, this utility model also provides a vehicle, including the battery box or the battery pack as described above.

[0021] The battery box provided by this utility model allows the gas in the ejected material to be discharged through the screen structure, the cavity of the frame and the exhaust port by setting a screen structure on the surface of the frame near the receiving chamber. For solids in the ejected material, the screen structure can filter and block them, reducing the probability of solids in a burning state being discharged and reducing the risk of solids igniting combustibles in the environment.

[0022] By creating a cavity inside the frame, the overall weight of the battery box can be reduced. By aligning the projection of the vent with the projection of the screen structure, the ejected material can be directly discharged from the vent after passing through the screen structure. This shortens the travel path of the ejected material within the cavity and reduces its residence time. This avoids the problem of the frame temperature rising due to increased cavity temperature, which could adversely affect the normal battery compartment.

[0023] The battery pack and vehicle provided by this utility model include the battery box provided by this utility model, and therefore also include all the advantages of the battery box mentioned above, so they will not be described in detail here. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the frame provided in the embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the cavity structure of the frame provided in the embodiment of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Frame; 101. Reception chamber; 1011. Battery chamber; 1012. Electrical chamber; 102. Cavity; 1021. Exhaust chamber; 1022. First cavity; 1023. Second cavity; 1024. Third cavity; 103. Screen structure; 104. Exhaust port; 105. Exhaust hole; 106. Base plate assembly; 107. Side beam assembly; 1071. First side beam; 1072. Second side beam; 1073. Inclined beam; 108. Separator beam; 2. Battery; 3. Partition; 4. Explosion-proof valve; X, First direction; Y, Second direction. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the battery pack design of related technologies, an exhaust channel is typically installed inside the casing frame. One end of the exhaust channel connects to the housing chamber enclosed by the casing frame, while the other end is located on the outer surface of the casing frame. In the event of thermal runaway of the battery, the exhaust channel can promptly expel the ejected materials generated by the battery, preventing excessive pressure or temperature within the housing chamber from leading to more serious safety accidents.

[0031] However, ejected material during battery thermal runaway, especially substances in a combustible state, can ignite flammable materials in the external environment after being ejected through the exhaust channels, potentially causing a fire. This not only poses a threat to the surrounding environment but may also endanger personal safety, severely limiting the safety performance and application scope of battery packs.

[0032] To address or mitigate the problem that ejected material during battery thermal runaway may ignite flammable materials after exiting the exhaust channel, this utility model provides a battery box, a battery pack, and a vehicle.

[0033] The following is combined with Figures 1 to 2 This describes the battery box provided in the embodiments of the present invention.

[0034] Specifically, the battery box includes a frame 1.

[0035] The frame 1 forms a receiving chamber 101 for accommodating the battery 2, thereby fixing and protecting the battery 2. The interior of the frame 1 has a cavity 102, for example, the frame 1 includes a hollow profile structure, and the hollow part of the profile structure forms the cavity 102.

[0036] The surface of frame 1 located inside the receiving chamber 101 is provided with a screen structure 103, which connects the receiving chamber 101 and the cavity 102. The surface of frame 1 located outside the receiving chamber 101 is provided with an exhaust port 104, which connects to the cavity 102. Alternatively, the surface of frame 1 closest to the receiving chamber 101 is provided with the screen structure 103, and the surface of frame 1 facing away from the receiving chamber 101 is provided with the exhaust port 104. The screen structure 103, the cavity 102, and the exhaust port 104 form an exhaust channel, which can be used to discharge gas from the receiving chamber 101 during the thermal runaway of battery 2.

[0037] In the orientation direction of the exhaust port 104, the exhaust port 104 is arranged opposite to the screen structure 103. Along the orientation of the exhaust port 104, the projection of the exhaust port 104 onto the plane where the screen structure 103 is located at least partially coincides with the screen structure 103.

[0038] In this embodiment, when the battery 2 experiences thermal runaway and generates ejected material, the gas in the ejected material can be discharged through the screen structure 103, the cavity 102, and the exhaust port 104, preventing excessive pressure or temperature within the containment chamber 101. Meanwhile, the solid material in the ejected material that is in a burning state is filtered and blocked by the screen structure 103, preventing it from being discharged to the outside of the containment chamber 101.

[0039] With this configuration, by setting a screen structure 103 on the surface of the frame 1 near the receiving chamber 101, the gas in the ejected material can be allowed to pass through the screen structure 103, the cavity 102 of the frame 1 and the exhaust port 104 to be discharged, while the solids in the ejected material can be filtered and blocked, reducing the probability of solids in a burning state being discharged and reducing the risk of solids igniting combustibles in the environment.

[0040] By forming a cavity 102 inside the frame 1, the overall weight of the battery box can be reduced. By aligning the projection of the exhaust port 104 with the projection of the screen structure 103, the ejected material can be directly discharged from the exhaust port 104 after passing through the screen structure 103, shortening the travel path of the ejected material in the cavity 102 and reducing the residence time of the ejected material in the cavity 102. This avoids the problem that the temperature rise of the cavity 102 will cause the temperature of the frame 1 to rise, which would adversely affect the normal battery 2 in the housing chamber 101.

[0041] refer to Figure 1 As shown, in some embodiments of this utility model, a plurality of sieve holes are formed on the surface of the frame 1 near the receiving chamber 101, and the portion of the frame 1 with the plurality of sieve holes constitutes a sieve structure 103. Optionally, as shown... Figure 1As shown, multiple sieve holes can be arranged in an array. Alternatively, multiple sieve holes can be distributed in a circular area, i.e., multiple sieve holes are arranged in a circular pattern. Or, multiple sieve holes can be distributed in an annular area, i.e., multiple sieve holes are arranged in a ring pattern.

[0042] In this embodiment, by forming a screen structure 103 by opening screen holes on the frame 1, the stress can be distributed more evenly in each part of the frame 1, reducing the situation of excessive local stress, and maintaining the overall rigidity and strength of the frame 1, so as to improve the durability of the overall structure.

[0043] Of course, the screen structure 103 is not limited to being formed by opening multiple screen holes in the frame 1. For example, in other embodiments provided by this utility model, the battery box also includes a filter element. The frame 1 has mounting holes on the surface of the receiving chamber 101, the filter element covers the mounting holes and is connected to the frame 1, and the filter element constitutes a filter screen structure. Optionally, the filter element can be a filter screen or a filter plate.

[0044] In this embodiment, using a filter element independent of the frame 1 makes it easier to replace filters with different pore sizes or shapes to optimize exhaust performance or filtration efficiency. Furthermore, when a filter element is damaged, clogged, or requires an upgrade, a new filter element can be directly replaced without re-manufacturing the entire frame 1.

[0045] In addition, during the initial design or initial use phases, different filter elements can be used to test and verify the optimal pore size and pore shape to achieve the best performance.

[0046] Optionally, the filter element and frame 1 can be snap-fitted together, or the filter element and frame 1 can be connected by threads. This design facilitates the disassembly, replacement, or cleaning of the filter element, thereby reducing the difficulty of filter element replacement and cleaning.

[0047] Of course, the filter element is not limited to being snapped onto the frame 1 or connected via threaded connections. For example, in other embodiments provided by this utility model, the filter element can also be bonded to the frame 1, thus achieving a better sealing effect between the filter element and the frame 1. Of course, when bonding the filter element to the frame 1, the filter element can also be disassembled and replaced by breaking the adhesive layer and reapplying adhesive; this is not limited to this method.

[0048] refer to Figure 1 and Figure 2 As shown, in some embodiments provided by this utility model, the surface of the frame 1 near the receiving chamber 101 is also provided with an exhaust hole 105, which connects the receiving chamber 101 and the cavity 102.

[0049] The vent holes 105 and the screen structure 103 are spaced apart, meaning there is a gap between them, so that the vent holes 105 and the vent outlets 104 are staggered. The aperture of the vent holes 105 is larger than the aperture of the screen structure 103.

[0050] In this embodiment, by providing an exhaust hole 105 on the frame 1, and staggering the exhaust port 104, while the screen structure 103 is opposite to the exhaust port 104, the path between the screen structure 103 and the exhaust port 104 is shorter than the path between the exhaust hole 105 and the exhaust port 104, resulting in less resistance. Therefore, when the battery 2 experiences thermal runaway, the ejected material preferentially passes through the screen structure 103 for filtration and is discharged, with a small portion of the ejected material being discharged through the exhaust hole 105, thereby improving the ejection efficiency of the ejected material. This analysis shows that the exhaust hole 105 does not significantly affect the effect of the screen structure 103 in reducing the amount of solid ejected material discharged.

[0051] In addition, even when there is a large amount of ejected material that causes the screen structure 103 to become clogged, the vent 105 can still perform the task of discharging the ejected material, thus preventing excessive pressure or temperature in the containment chamber 101 and avoiding the problem of heat spread in the battery 2.

[0052] refer to Figure 2 As shown, in some embodiments provided by this utility model, the battery box also includes a partition 3.

[0053] The partition 3 is disposed within the cavity 102, with one end of the partition 3 being sealed to the side wall of the cavity 102 near the receiving chamber 101, and the other end of the partition 3 being sealed to the side wall of the cavity 102 away from the receiving chamber 101. For example, the partition 3 is bonded, welded, or sealed to the side wall of the cavity 102 to achieve a sealing effect.

[0054] The partition 3 forms a closed venting chamber 1021 inside the cavity 102. That is, the venting chamber 1021, separated by the partition 3 inside the cavity 102, has a volume smaller than the volume of the cavity 102. Optionally, as... Figure 2 As shown, the baffles 3 are arranged in pairs, with a gap between each pair of baffles 3, and the space between the pair of baffles 3 forms an exhaust chamber 1021.

[0055] The exhaust chamber 1021 is connected to the exhaust port 104 and the screen structure 103. That is, both the exhaust port 104 and the screen structure 103 are connected to the exhaust chamber 1021, and the screen structure 103, the exhaust chamber 1021, and the exhaust port 104 form an exhaust channel. In addition, if an exhaust hole 105 is provided, the exhaust hole 105 is also connected to the exhaust chamber 1021.

[0056] In this embodiment, when the battery 2 experiences thermal runaway and generates ejected material, the gas in the ejected material can be discharged through the screen structure 103, the exhaust chamber 1021, and the exhaust port 104, preventing excessive pressure or temperature within the containment chamber 101. Meanwhile, the solid material in the ejected material that is in a burning state is filtered and blocked by the screen structure 103, preventing it from being discharged to the outside of the containment chamber 101.

[0057] Since the exhaust chamber 1021 is enclosed within the cavity 102, the ejected material in the exhaust chamber 1021 will not spread to a larger area of ​​the cavity 102 during the process of emitting the ejected material. That is, the ejected material is only within a small area of ​​the exhaust chamber 1021.

[0058] This design avoids the problem of high-pressure ejected material filling the cavity 102 when the pressure inside the receiving chamber 101 is high, and then flowing back into the receiving chamber 101 after the pressure inside the receiving chamber 101 drops. In other words, the exhaust chamber 1021 has a smaller volume, preventing excessive pressure fluctuations inside the receiving chamber 101 due to accommodating a large amount of ejected material, thus reducing the risk of ejected material backflow.

[0059] In addition, the closed design of the exhaust chamber 1021 can effectively limit the diffusion range of the ejected material in the cavity 102, prevent the ejected material from spreading over a large area in the cavity 102, thereby avoiding the problem that the temperature of the cavity 102 rises and causes the temperature of the frame 1 to rise, which would have an adverse effect on the normal battery 2 in the housing chamber 101.

[0060] Finally, the smaller volume of the exhaust chamber 1021 also helps to expel the ejected material more quickly, reducing the residence time of the ejected material in the cavity 102 and reducing the risk of fire and explosion.

[0061] Alternatively, the partition 3 can be made of metal, foam, or glue.

[0062] refer to Figure 1 and Figure 2 As shown, in some embodiments provided by this utility model, the frame 1 includes a base plate assembly 106 and a side beam assembly 107.

[0063] The side beam assembly 107 is arranged around the circumferential edge of the base plate assembly 106. The base plate assembly 106 and the side beam assembly 107 together form a receiving chamber 101, that is, the side beam assembly 107 forms a ring structure, and the base plate assembly 106 is located at one end of the ring structure, forming the receiving chamber 101 together with the ring structure. Optionally, the side beam assembly 107 and the base plate assembly 106 are welded, bonded, screwed, or made into a cast integral structure.

[0064] The cavity 102 is at least located inside the side beam assembly 107. For example, the side beam assembly 107 includes a hollow profile structure, and the hollow portion of the profile structure forms the cavity 102. The screen structure 103 and the vent 104 are both located on the side beam assembly 107.

[0065] In this embodiment, since the accessories required on the side beam assembly 107 are usually few, placing the screen structure 103 and the vent 104 on the side beam assembly 107 can make full use of the installation space on the side beam assembly 107 and improve the space utilization rate of the side beam assembly 107. In addition, placing the screen structure 103 and the vent 104 on the side beam assembly 107 can reduce the possibility that the screen structure 103 and the vent 104 will interfere with or affect other accessories.

[0066] refer to Figure 1 and Figure 2 As shown, in some embodiments provided by this utility model, the frame 1 further includes a partition beam 108.

[0067] The partition beam 108 is disposed within the housing 101, dividing the housing 101 into a battery compartment 1011 and an electrical compartment 1012. The battery compartment 1011 is used to house the battery 2, and the electrical compartment 1012 is used to house electrical components, such as, but not limited to, a battery management system, relays, contactors, and fuses.

[0068] The partition beam 108 is provided with a connecting channel that connects the battery compartment 1011 and the electrical compartment 1012. For example, the connecting channel can be configured as a through hole or a flow channel. The screen structure 103 is provided in either the battery compartment 1011 or the electrical compartment 1012.

[0069] In this embodiment, the housing 101 is divided into a battery compartment 1011 and an electrical compartment 1012 by a partition beam 108, allowing the battery 2 and electrical components to be respectively housed in the battery compartment 1011 and the electrical compartment 1012. Since the battery 2 and electrical components have different heat dissipation requirements, separating them allows for the design of independent heat dissipation systems tailored to their respective characteristics, improving heat dissipation efficiency. Simultaneously, placing the electrical components within the electrical compartment 1012 reduces the impact of heat generated during operation on the performance of the battery 2.

[0070] In addition, by placing electrical components in the electrical room 1012, technicians can easily open the electrical room 1012 to inspect or maintain the electrical components, reducing the workload of disassembly and assembly.

[0071] In this embodiment, if the screen structure 103 is connected to the electrical chamber 1012, the ejected material generated by the battery 2 can enter the electrical chamber 1012 from the battery chamber 1011 through the connecting channel, and then be discharged through the filter structure. If the screen structure 103 is connected to the battery chamber 1011, the ejected material from the battery 2 into the battery chamber 1011 can be discharged through the screen structure 103.

[0072] It is understandable that if the screen structure 103 is only provided in the battery compartment 1011, then the connecting channel may or may not be provided on the partition beam 108.

[0073] In some embodiments provided by this utility model, the number of screen structures 103 can be at least two, and both the battery compartment 1011 and the electrical compartment 1012 are provided with corresponding screen structures 103.

[0074] Optionally, each screen structure 103 is connected to the vent 104 through the cavity 102, that is, at least two screen structures 103 can share one or more vents 104.

[0075] Alternatively, the screen structure 103, the exhaust chamber 1021, and the exhaust port 104 are in one-to-one correspondence, that is, each screen structure 103 is connected to the corresponding exhaust port 104 through the corresponding exhaust chamber 1021.

[0076] In this embodiment, the ejected material generated by the battery 2 near the electrical chamber 1012 can be quickly discharged through the screen structure 103 of the electrical chamber 1012, and the ejected material generated by the battery 2 far from the electrical chamber 1012 can be quickly discharged through the screen structure 103 of the battery chamber 1011.

[0077] This design, with multiple venting channels, ensures that ejected material can be quickly expelled regardless of its origin, reducing the time it remains inside the battery pack and lowering the risk of fire and explosion. Furthermore, multiple venting channels increase the battery pack's redundancy; even if one venting channel fails, the others can continue to function.

[0078] In some embodiments of this invention, the battery box further includes an explosion-proof valve 4. The explosion-proof valve 4 is installed at the vent 104.

[0079] In this embodiment, by providing an explosion-proof valve 4 at the exhaust port 104, the exhaust port 104 can be sealed when the explosion-proof valve 4 is not open, so that the receiving chamber 101 forms a sealed chamber, thereby improving the sealing performance of the battery box and preventing moisture or dust from entering the receiving chamber 101.

[0080] When excessive pressure is generated inside the containment chamber 101 due to thermal runaway of the battery 2, the explosion-proof valve 4 can respond quickly and open to discharge the high-pressure gas and harmful substances inside, thereby preventing the battery box from rupturing or exploding due to excessive pressure.

[0081] In some embodiments provided by this utility model, the battery box has intersecting first direction X and second direction Y. For example, the first direction X is set as the width direction of the battery box, and the second direction Y is set as the length direction of the battery box. For example, the first direction X and the second direction Y are perpendicular.

[0082] The side beam assembly 107 includes a first side beam 1071, a second side beam 1072, and an inclined beam 1073.

[0083] The first side beam 1071 extends along a first direction X, and the second side beam 1072 extends along a second direction Y. The first side beam 1071 is connected to the second side beam 1072 via an inclined beam 1073. The inclined beam 1073 is inclined relative to the first direction X and the second direction Y, that is, the inclined beam 1073 is inclined relative to the first side beam 1071 and also inclined relative to the second side beam 1072. The cavity 102 includes a first cavity 1022 disposed inside the inclined beam 1073. The screen structure 103 and the exhaust port 104 are both disposed on the inclined beam 1073 and are both connected to the first cavity 1022.

[0084] In this embodiment, since the first side beam 1071 and the second side beam 1072 serve as the main supporting structures of the frame 1 and bear the responsibility of reinforcing the battery box structure, they typically have high strength requirements. The inclined beam 1073 is located at the junction of the first side beam 1071 and the second side beam 1072, serving as an auxiliary connection and support. Therefore, the influence of the inclined beam 1073 on the structural strength of the battery box is smaller than that of the first side beam 1071 or the second side beam 1072. Thus, by setting a screen structure 103 and opening an exhaust port 104 on the inclined beam 1073, the impact on the structural strength of the frame 1 can be reduced.

[0085] Furthermore, compared to the form where the first side beam 1071 and the second side beam 1072 are directly connected to form a right-angle structure, the form where the first side beam 1071 is connected to the second side beam 1072 through the inclined beam 1073 can be understood as cutting off the right-angle structure formed by the first side beam 1071 and the second side beam 1072, and using the space created after the cutting off to set up the exhaust port 104 and the explosion-proof valve 4. In this way, the explosion-proof valve 4 does not protrude from the first side beam 1071 and the second side beam 1072, and the exhaust port 104 and the explosion-proof valve 4 can be protected by the first side beam 1071 and the second side beam 1072, reducing the probability of the explosion-proof valve 4 being damaged by collision.

[0086] In some embodiments of this utility model, the cavity 102 further includes a second cavity 1023 disposed inside the first side beam 1071. The second cavity 1023 communicates with the first cavity 1022, that is, both the first side beam 1071 and the inclined beam 1073 are hollow beams and are connected to each other. The surface of the first side beam 1071 near the receiving chamber 101 is provided with an exhaust hole, which communicates with the second cavity 1023. The diameter of the exhaust hole is larger than the sieve aperture of the screen structure 103.

[0087] In this embodiment, the path between the vent hole and the vent outlet 104 is a zigzag path with a longer path length. Therefore, the path between the screen structure 103 and the vent outlet 104 is shorter than the path between the vent hole and the vent outlet 104, resulting in less resistance. Thus, when the battery 2 experiences thermal runaway, the ejected material is preferentially filtered through the screen structure 103 before being discharged, with a small portion of the ejected material being discharged through the vent hole, thereby improving the ejection efficiency of the ejected material. This analysis shows that the vent hole does not significantly affect the effect of the screen structure 103 in reducing the amount of solid ejected material discharged.

[0088] In addition, even when there is a large amount of ejected material, causing the screen structure 103 to become clogged, the vent can still perform the task of discharging the ejected material, thus preventing excessive pressure or temperature in the containment chamber 101 and avoiding the problem of heat spread in the battery 2.

[0089] refer to Figure 2 As shown, in some embodiments of this utility model, the cavity 102 further includes a third cavity 1024 disposed inside the second side beam 1072. The third cavity 1024 is connected to the first cavity 1022, that is, both the second side beam 1072 and the inclined beam 1073 are hollow beams and are connected to each other. The surface of the second side beam 1072 near the receiving chamber 101 is provided with an exhaust hole 105, which is connected to the third cavity 1024. The diameter of the exhaust hole 105 is larger than the sieve hole diameter of the screen structure 103.

[0090] In this embodiment, the path between the vent hole 105 and the vent outlet 104 is a zigzag path, which is longer. Therefore, the path between the screen structure 103 and the vent outlet 104 is shorter than the path between the vent hole 105 and the vent outlet 104, resulting in less resistance. Thus, when the battery 2 experiences thermal runaway, the ejected material is preferentially filtered through the screen structure 103 before being discharged, and a small portion of the ejected material can be discharged through the vent hole 105, thereby improving the ejection efficiency of the ejected material. Therefore, the vent hole 105 does not significantly affect the effect of the screen structure 103 in reducing the amount of solid ejected material discharged.

[0091] In addition, even when there is a large amount of ejected material that causes the screen structure 103 to become clogged, the vent 105 can still perform the task of discharging the ejected material, thus preventing excessive pressure or temperature in the containment chamber 101 and avoiding the problem of heat spread in the battery 2.

[0092] Optionally, the partition members 3 are arranged in pairs. For example, a pair of partition members 3 are respectively arranged inside the first side beam 1071 and the second side beam 1072, and the space between the pair of partition members 3 forms an exhaust chamber 1021.

[0093] In some embodiments provided by this utility model, there are two first side beams 1071, which are arranged opposite each other and spaced apart. There are also two second side beams 1072, which are arranged opposite each other and spaced apart. The two first side beams 1071 and the two second side beams 1072 are joined together to form a rectangular frame. This arrangement simplifies the structure of the frame 1.

[0094] Optionally, at least one end of at least one first side beam 1071 is connected to a corresponding second side beam 1072 via an inclined beam 1073. For example, one end of the first side beam 1071 is connected to the corresponding second side beam 1072 via an inclined beam 1073, and the other end is directly connected to the corresponding second side beam 1072. Alternatively, both ends of the first side beam 1071 are connected to the corresponding second side beam 1072 via corresponding inclined beams 1073.

[0095] This configuration allows for the installation of screen structures 103 and vents 104 on two or more inclined beams 1073, thus forming at least two venting channels. This ensures that ejected material can be quickly discharged regardless of its origin, reducing the residence time of ejected material inside the battery pack and lowering the risk of fire and explosion. Furthermore, having at least two venting channels increases the redundancy of the battery pack; even if one venting channel fails, the others can continue to operate.

[0096] Optionally, the two ends of the partition beam 108 are connected to two second side beams 1072 respectively.

[0097] In some embodiments provided by this utility model, the battery box also includes a cover assembly.

[0098] The cover assembly is connected to the end of the side beam assembly 107 opposite to the bottom plate assembly 106 and is used to seal the receiving chamber 101. Optionally, the cover assembly can be connected to the side beam assembly 107 via a threaded connection, or the cover assembly can be bonded to the side beam assembly 107. By sealing the receiving chamber 101 with the cover assembly, the battery 2 can be protected, and moisture or impurities can be prevented from entering the receiving chamber 101 and affecting the battery 2.

[0099] This utility model also provides a battery pack in this embodiment.

[0100] Specifically, the battery pack includes battery 2 and a battery case as described above. Battery 2 is disposed in housing 101.

[0101] It should be noted that the battery pack includes the battery box, and therefore includes all the advantages of the battery box mentioned above, so it will not be elaborated further.

[0102] This utility model also provides a vehicle.

[0103] Specifically, the vehicle includes a battery box as described above or a battery pack as described above.

[0104] It should be noted that the vehicle includes the battery pack, and therefore also includes all the advantages of the battery pack mentioned above, so this will not be elaborated further.

[0105] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery box, characterized in that, Includes framework (1); The frame (1) encloses a housing chamber (101) for accommodating the battery (2). The interior of the frame (1) has a cavity (102). A screen structure (103) is provided on the surface of the frame (1) near the housing chamber (101). The screen holes of the screen structure (103) connect the housing chamber (101) and the cavity (102). An exhaust port (104) is provided on the surface of the frame (1) away from the housing chamber (101). The exhaust port (104) communicates with the cavity (102). Along the orientation of the exhaust port (104), the projection of the exhaust port (104) onto the plane of the screen structure (103) at least partially coincides with the screen structure (103).

2. The battery box according to claim 1, characterized in that, The surface of the frame (1) near the receiving chamber (101) is also provided with an exhaust hole (105). The exhaust hole (105) connects the receiving chamber (101) and the cavity (102). The exhaust holes (105) are distributed at intervals with the screen structure (103). The aperture of the exhaust hole (105) is larger than the aperture of the screen structure (103).

3. The battery box according to claim 1, characterized in that, The battery box also includes a partition (3), which is disposed in the cavity (102). One end of the partition (3) is sealed to the side wall of the cavity (102) near the receiving chamber (101), and the other end is sealed to the side wall of the cavity (102) away from the receiving chamber (101). The partition (3) separates an exhaust chamber (1021) inside the cavity (102), and the exhaust chamber (1021) is connected to the exhaust port (104) and the screen structure (103).

4. The battery box according to any one of claims 1-3, characterized in that, The frame (1) includes a base plate assembly (106) and a side beam assembly (107); The side beam assembly (107) is arranged around the circumferential edge of the base plate assembly (106) and together with the base plate assembly (106) forms the receiving chamber (101). The cavity (102) is at least located inside the side beam assembly (107). The screen structure (103) and the exhaust port (104) are both located on the side beam assembly (107).

5. The battery box according to claim 4, characterized in that, The frame (1) also includes a partition beam (108); The partition beam (108) is provided in the accommodating chamber (101) and divides the accommodating chamber (101) into a battery chamber (1011) and an electrical chamber (1012). The partition beam (108) is provided with a connecting channel for connecting the battery chamber (1011) and the electrical chamber (1012). The screen structure (103) is provided in the battery chamber (1011) or the electrical chamber (1012).

6. The battery box according to claim 4, characterized in that, The battery box has intersecting first direction (X) and second direction (Y), and the side beam assembly (107) includes a first side beam (1071), a second side beam (1072) and a diagonal beam (1073); Wherein, the first side beam (1071) extends along the first direction (X), the second side beam (1072) extends along the second direction (Y), the first side beam (1071) is connected to the second side beam (1072) through the inclined beam (1073), the inclined beam (1073) is inclined relative to the first direction (X) and the second direction (Y), the cavity (102) includes a first cavity (1022) disposed inside the inclined beam (1073), the screen structure (103) and the exhaust port (104) are both disposed on the inclined beam (1073) and are both connected to the first cavity (1022).

7. The battery box according to claim 6, characterized in that, The cavity (102) further includes a second cavity (1023) disposed inside the first side beam (1071), the second cavity (1023) communicating with the first cavity (1022), and the surface of the first side beam (1071) near the receiving chamber (101) is provided with an exhaust hole (105), the exhaust hole (105) communicating with the second cavity (1023), and the aperture of the exhaust hole (105) being larger than the aperture of the screen structure (103); And / or, the cavity (102) further includes a third cavity (1024) disposed inside the second side beam (1072), the third cavity (1024) communicating with the first cavity (1022), the surface of the second side beam (1072) near the receiving chamber (101) is provided with an exhaust hole (105), the exhaust hole (105) communicating with the third cavity (1024), and the aperture of the exhaust hole (105) being larger than the aperture of the screen structure (103).

8. The battery box according to any one of claims 1-3, characterized in that, The battery box also includes an explosion-proof valve (4), which is installed at the vent (104).

9. A battery pack, characterized in that, Includes a battery (2) and a battery case as described in any one of claims 1-8, wherein the battery (2) is disposed within the receiving chamber (101).

10. A vehicle, characterized in that, This includes the battery box as described in any one of claims 1-8 or the battery pack as described in claim 9.

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