Box assembly, battery pack and carrier

Abstract

The invention relates to the field of batteries, and discloses a box body assembly, a battery pack and a carrier. The box body assembly comprises a box body, the box body is provided with a battery bin and a function bin which are independent from each other, the box body is further provided with a communication channel, the communication channel is provided with a first port and a second port, and the first port is formed in the battery bin and allows gas in the battery bin to enter; the cover plate assembly is connected with the top surface of the box body and covers the battery bin and the functional bin; and the anti-explosion valve is arranged on the cover plate assembly and is opposite to the functional bin. As the first port is arranged above the liquid level, a large amount of cooling liquid is difficult to enter the communication channel along with the gas and reach the functional bin, and the possibility that the cooling liquid is in contact with the anti-explosion valve is reduced from the source. The explosion-proof valve is installed on the cover plate assembly and right faces the top of the functional bin, so that the installation position of the explosion-proof valve is high, the explosion-proof valve can be spatially isolated from a trace amount of cooling liquid possibly existing in the functional bin, and abnormal triggering caused by soaking of the cooling liquid is prevented.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a box assembly, a battery pack and a carrier. Background Art

[0002] The rapid development of electric vehicles and energy storage systems is placing higher demands on battery safety and lifespan. Immersed battery liquid cooling technology, an emerging cooling method, achieves a uniform temperature distribution outside the battery by immersing the battery pack in an insulating coolant, effectively suppressing thermal runaway and extending the battery's cycle life.

[0003] However, when a battery experiences thermal runaway, it produces a large amount of gas, which must be discharged through the explosion-proof valve installed in the battery pack casing to ensure system safety. Because the casing contains coolant, some of the coolant will flow into the explosion-proof valve along with the gas during the exhaust process, causing the explosion-proof valve to be soaked in coolant and malfunction, preventing it from properly performing its exhaust function. Summary of the Invention

[0004] In view of this, the present invention provides a box assembly, a battery pack and a vehicle to solve or improve the problem that the explosion-proof valve is easily soaked by coolant during the exhaust process.

[0005] In a first aspect, the present invention provides a box assembly, comprising:

[0006] A box body, wherein a battery compartment and a functional compartment are provided independently of each other, and the box body is further provided with a communication channel, wherein the communication channel has a first port and a second port, the first port being provided in the battery compartment and allowing gas in the battery compartment to enter, and the second port being provided in the functional compartment;

[0007] a cover assembly connected to the top surface of the box body and covering the battery compartment and the functional compartment;

[0008] The explosion-proof valve is arranged on the cover plate assembly and is arranged opposite to the functional compartment.

[0009] In an optional embodiment, the box body includes a bottom plate, side panels and a first partition;

[0010] The side panels are arranged around the circumferential edge of the bottom plate and enclose the bottom plate to form a storage space. The first partition is arranged in the storage space and is respectively connected to the bottom plate and the side panels. The first partition divides the storage space into the battery compartment and the functional compartment.

[0011] At least one of the side panel and the first partition is provided with the communication passage.

[0012] In an optional embodiment, the side panel is configured as a profile structure having a cavity inside, and the cavity inside the side panel forms the communication channel;

[0013] And / or, the first partition is configured as a profile structure having a cavity inside, and the cavity inside the first partition forms the connecting channel.

[0014] In an optional embodiment, the functional compartment includes an electrical room and an exhaust chamber arranged on both sides of the electrical room, the exhaust chamber and the electrical room are independent of each other, the exhaust chambers are connected to the battery compartment through the corresponding connecting channels, and the cover assembly is provided with the explosion-proof valve at the position corresponding to each exhaust chamber.

[0015] In an optional embodiment, the box assembly further includes a baffle, which is disposed on the outside of the cover assembly and connected to the box and / or the cover assembly, the baffle covers the explosion-proof valve, and the baffle forms a discharge port facing the horizontal direction.

[0016] In an optional embodiment, the discharge port is provided at an edge of the baffle close to the outer side of the box body, and the discharge port faces the outer side of the box body;

[0017] And / or, a first recess is provided on the surface of the baffle close to the cover assembly, the first recess is opposite to the explosion-proof valve, and the first recess extends to the edge of the baffle to create a gap between the edge of the baffle and the cover assembly.

[0018] In an optional embodiment, a second recess is provided at a position of the cover assembly opposite to the functional compartment, the second recess is provided on the surface of the cover assembly away from the box body, the explosion-proof valve is provided in the second recess, and the protruding height of the explosion-proof valve is less than or equal to the recess depth of the second recess.

[0019] In an optional embodiment, the box assembly further includes a blocking cover, which is arranged on the side wall of the functional compartment and blocks the second port. An exhaust port is formed at one end of the blocking cover close to the cover assembly.

[0020] In a second aspect, the present invention further provides a battery pack comprising the box assembly as described above.

[0021] In a third aspect, the present invention further provides a vehicle comprising the box assembly as described above or the battery pack as described above.

[0022] In the box assembly provided by the present invention, the gas generated in the battery compartment needs to enter the functional compartment through the connecting channel. However, since the first port of the coolant is arranged above the liquid surface, it is difficult for a large amount of coolant to follow the gas into the connecting channel and reach the functional compartment, thereby reducing the possibility of the coolant contacting the explosion-proof valve from the source.

[0023] The explosion-proof valve is installed on the cover assembly and directly opposite the top of the functional compartment, so that the installation position of the explosion-proof valve is higher, which can maintain spatial isolation from the trace coolant that may exist in the functional compartment, ensuring that the explosion-proof valve is always in a dry triggering environment to prevent triggering abnormalities caused by coolant immersion.

[0024] The battery pack and carrier provided by the present invention, since they include the box assembly provided by the present invention, also include all the above-mentioned advantages of the box assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the internal structure of a battery pack provided by an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A partial enlarged schematic diagram;

[0028] Figure 3 for Figure 2 Cross-section of the middle AA;

[0029] Figure 4 A top view of a battery pack provided by an embodiment of the present invention;

[0030] Figure 5 for Figure 4 A partial enlarged schematic diagram of B in the middle;

[0031] Figure 6 for Figure 2 Cross-section of the middle CC;

[0032] Figure 7 for Figure 2 Cross-section of the middle BB.

[0033] Description of reference numerals:

[0034] 1. Box body; 101. Battery compartment; 102. Function compartment; 1021. Electrical room; 1022. Exhaust room; 103. Communication channel; 1031. First port; 1032. Second port; 104. Bottom plate; 105. Side panel; 1051. First end beam; 1052. Second end beam; 1053. Side beam; 1054. Oblique beam; 1055. Blocking piece; 106. First partition; 107. Second partition; 2. Cover assembly; 201. First cover; 202. Second cover; 203. Third cover; 204. Second recess; 3. Explosion-proof valve; 4. Baffle; 401. First recess; 5. Blocking cover; 501. Exhaust port. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0036] Immersed battery liquid cooling technology, as an emerging cooling method, achieves uniform temperature distribution outside the battery by immersing the battery pack in an insulating coolant, effectively suppressing thermal runaway and extending the battery's cycle life. However, when thermal runaway occurs, a large amount of gas is generated, which needs to be discharged through explosion-proof valves installed in the battery pack body to ensure system safety.

[0037] Since there is coolant in the box, during the exhaust process, some coolant will flow to the explosion-proof valve position along with the gas, causing the explosion-proof valve to be soaked in coolant and malfunction, making it unable to perform the exhaust function normally, thereby seriously affecting the safety of the entire battery pack.

[0038] In order to solve or improve the problem that the explosion-proof valve is easily soaked by coolant during the exhaust process, an embodiment of the present invention provides a box assembly, a battery pack and a vehicle.

[0039] The following combination Figures 1 to 7 , describing the box assembly provided in an embodiment of the present invention.

[0040] Specifically, the box assembly includes a box body 1 , a cover assembly 2 and an explosion-proof valve 3 .

[0041] The housing 1 is provided with a battery compartment 101 and a functional compartment 102, which are independent of each other. It is understood that the top of the housing 1 is open, so that the tops of the battery compartment 101 and the functional compartment 102 each form a corresponding compartment opening. The battery compartment 101 is used to store batteries and coolant, while the functional compartment 102 can be used for exhaust and, of course, can also accommodate a high-voltage control module.

[0042] The housing 1 is further provided with a communication channel 103 having a first port 1031 and a second port 1032. The first port 1031 is disposed on the battery compartment 101, for example, on the inner sidewall of the battery compartment 101, and is used to allow gas within the battery compartment 101 to enter. Specifically, at least a portion of the first port 1031 is located above the coolant level, allowing gas generated within the battery compartment 101 to enter the communication channel 103 through the first port 1031.

[0043] The second port 1032 is provided in the functional chamber 102, for example, on the inner wall of the functional chamber 102, so that the gas in the communication channel 103 can be discharged into the functional chamber 102. Optionally, at least a portion of the second port 1032 is located above the liquid level of the coolant.

[0044] The cover assembly 2 is connected to the top surface of the box body 1. Optionally, the cover assembly 2 can be connected to the box body 1 by screwing, riveting, bonding, or welding. The cover assembly 2 covers the functional compartment 102 and the battery compartment 101. That is, the cover assembly 2 covers the compartment openings of both the functional compartment 102 and the battery compartment 101.

[0045] The explosion-proof valve 3 is arranged on the cover assembly 2, and the explosion-proof valve 3 is arranged opposite to the functional compartment 102, or in other words, the explosion-proof valve 3 is arranged at a position opposite to the cover assembly 2 and the functional compartment 102, so that the gas in the functional compartment 102 can trigger the explosion-proof valve 3 and be exhausted through the explosion-proof valve 3.

[0046] In this embodiment of the present invention, the exhaust process of the housing assembly includes the following: Gas is generated within the battery compartment 101 due to abnormal battery conditions (such as thermal runaway). Because the first port 1031 is located in the battery compartment 101 and is at least partially above the coolant level, the gas can enter the communication channel 103 through the first port 1031. This allows the gas to preferentially enter the communication channel 103 by utilizing the lower density of the gas than the coolant, without being obstructed or interfered with by excessive coolant.

[0047] After the gas enters the communication channel 103, it flows along the communication channel 103 from the first port 1031 to the second port 1032. The communication channel 103 provides a directional transmission path for the gas, preventing the gas from spreading disorderly in the battery compartment 101, and facilitating centralized management and guided gas discharge.

[0048] After reaching the second port 1032, the gas is discharged into the functional chamber 102. Since the functional chamber 102 is relatively independent, the gas accumulates in the functional chamber 102. When the gas pressure in the functional chamber 102 reaches a certain level, it triggers the explosion-proof valve 3 provided at the position opposite to the cover assembly 2 and the functional chamber 102, and then the gas is discharged from the box assembly through the explosion-proof valve 3.

[0049] With this arrangement, the gas generated in the battery compartment 101 needs to enter the functional compartment 102 through the connecting channel 103. However, since the first port 1031 is arranged above the liquid surface, it is difficult for a large amount of coolant to follow the gas into the connecting channel 103 and reach the functional compartment 102, thereby reducing the possibility of the coolant contacting the explosion-proof valve 3 from the source.

[0050] The explosion-proof valve 3 is installed on the cover assembly 2 and is located on the top of the functional compartment 102, so that the installation position of the explosion-proof valve 3 is higher, which can maintain spatial isolation from the trace amount of coolant that may exist in the functional compartment 102, ensuring that the explosion-proof valve 3 is always in a dry triggering environment to prevent triggering abnormalities caused by coolant immersion.

[0051] refer to Figure 1 and Figure 2 As shown, in some embodiments provided by the present invention, the box body 1 includes a bottom plate 104 , a side panel 105 and a first partition 106 .

[0052] The side panels 105 surround the circumferential edge of the bottom plate 104 and, together with the bottom plate 104, form a receiving space. Optionally, the side panels 105 and the bottom plate 104 are integrally formed, for example, by welding or casting. Alternatively, the side panels 105 can be connected to the bottom plate 104 by screwing or riveting.

[0053] The first partition 106 is disposed within the storage space and is connected to the side panels 105 and the bottom panel 104, respectively. For example, the first partition 106 can be connected to the side panels 105 or the bottom panel 104 by welding, screwing, or riveting. The first partition 106 divides the storage space into the battery compartment 101 and the functional compartment 102.

[0054] At least one of the side panel 105 and the first partition 106 is provided with a communication channel 103. For example, Figure 2 The example shown is that the communication channel 103 is provided on the side panel 105 . Of course, it can be understood that in other embodiments not shown, the communication channel 103 can also be provided on the first partition 106 .

[0055] In this embodiment, the accommodating space is divided into a battery compartment 101 and a functional compartment 102 by a first partition 106. The battery compartment 101 is responsible for energy storage and liquid cooling, and the functional compartment 102 is responsible for exhaust and high-voltage control. This can achieve physical isolation of functional partitions, avoid thermal runaway, exhaust interference and cross-influence of electrical modules, and improve system safety and reliability.

[0056] The connecting channel 103 is directly integrated into the side panel 105 or the first partition 106 , thereby reducing additional connection interfaces, lowering the risk of gas leakage, and saving space.

[0057] In addition, the communication channel 103 can be arranged on the side panel 105 or the first partition 106 according to actual needs.

[0058] For example, if the communication channel 103 is provided on the side panel 105, the path of the communication channel 103 is longer, thereby extending the separation time of the gas and coolant. Gravity settling or inertial separation effects can be used to further reduce droplet entrainment, thereby reducing the risk of coolant entering the functional compartment 102. In addition, if the internal structure of the housing 1 is complex and the battery compartment 101 is compact, the provision of a channel on the side panel 105 can better avoid the complex internal structure of the housing 1, reducing the difficulty of arranging the communication channel 103.

[0059] Since the communication channel 103 is disposed on the partition, the path of the communication channel 103 is shorter, thereby significantly shortening the gas migration distance, quickly transmitting the pressure to the functional chamber 102, increasing the opening speed of the explosion-proof valve 3, and reducing the risk of explosion of the box body 1. Furthermore, the short path reduces heat loss during gas migration, maintaining the effectiveness of high-temperature gas in triggering the explosion-proof valve 3.

[0060] In some embodiments of the present invention, the side panel 105 is configured as a profile structure having a cavity therein, for example, the side panel 105 is configured as an aluminum profile or a steel profile. At least part of the cavity inside the side panel 105 forms the communication channel 103 .

[0061] In this embodiment, the cavity inside the side panel 105 is directly used as the communication channel 103 without the need for additional independent pipes or external structures, thereby saving internal space of the battery pack and improving overall compactness.

[0062] In addition, by setting the interior of the side panel 105 as a cavity, efficient distribution of materials can be achieved, reducing weight while ensuring strength, thereby meeting the lightweight requirements of the battery pack.

[0063] In addition, when the battery pack experiences thermal runaway due to a certain battery, some of the coolant in the battery compartment 101 will enter the connecting channel 103 from the first port 1031. The coolant will not reach the second port 1032 until it reaches a certain amount in the connecting channel 103. That is, due to its high density and slow flow rate, the coolant will gather at the bottom after entering the connecting channel 103. It needs to accumulate to a critical liquid level before it can reach the second port 1032. This design naturally forms gas-liquid stratification, realizes dynamic separation, and prevents the coolant from flowing into the functional compartment 102 with the airflow.

[0064] It is understandable that there is a preset distance between the first port 1031 and the bottom wall of the cavity in the side enclosure 105 , and there is also a preset distance between the second port 1032 and the bottom wall of the cavity in the side enclosure 105 , so that the communication channel 103 can accommodate part of the coolant.

[0065] Optionally, a blocking member 1055 is provided in the cavity of the side panel 105. Two blocking members 1055 are provided, and the two blocking members 1055 are spaced apart. The space between the two blocking members 1055 forms the communication channel 103. That is, the two blocking members 1055 partition and seal the cavity of the side panel 105, thereby limiting the scope of the flow channel.

[0066] In this embodiment, the two sealing members 1055 are spaced apart to clearly define a specific connecting channel 103, so that the gas generated in the battery compartment 101 can only flow in the predetermined channel, avoiding disorderly diffusion in the cavity of the side panel 105, reducing turbulence and resistance during gas transmission, and greatly improving exhaust efficiency.

[0067] Optionally, the number of cavities in the side panel 105 is at least three, with at least two cavities arranged along the height direction of the box body 1 , and two adjacent cavities separated by a partition. The two cavities at the top are connected to each other and form a connecting channel 103 .

[0068] In this embodiment, the use of partitions to separate the different cavities within the side panel 105 effectively isolates the functions of different areas. For example, the bottom cavity can be used exclusively for structural support or routing other wiring harnesses or piping, while the top cavity is focused on gas circulation. This prevents the functions of different cavities from interfering with each other and improves space utilization within the side panel 105.

[0069] In some embodiments of the present invention, the first partition 106 is configured as a profile structure having a cavity therein, for example, an aluminum profile or a steel profile. At least part of the cavity inside the first partition 106 forms the communication channel 103 .

[0070] In this embodiment, the cavity inside the first partition 106 is directly used as the communication channel 103 without the need for additional independent pipes or external structures, thereby saving internal space of the battery pack and improving overall compactness.

[0071] In addition, by setting the interior of the first separator 106 as a cavity, efficient distribution of materials can be achieved, and the weight can be reduced while ensuring strength, so as to meet the lightweight requirements of the battery pack.

[0072] In addition, when the battery pack experiences thermal runaway due to a certain battery, some of the coolant in the battery compartment 101 will enter the connecting channel 103 from the first port 1031. The coolant will not reach the second port 1032 until it reaches a certain amount in the connecting channel 103. That is, due to its high density and slow flow rate, the coolant will gather at the bottom after entering the connecting channel 103. It needs to accumulate to a critical liquid level before it can reach the second port 1032. This design naturally forms gas-liquid stratification, realizes dynamic separation, and prevents the coolant from flowing into the functional compartment 102 with the airflow.

[0073] It is understandable that a preset distance exists between the first port 1031 and the bottom wall of the cavity in the first partition 106 , and a preset distance exists between the second port 1032 and the bottom wall of the cavity in the first partition 106 , so that the communication channel 103 can accommodate part of the coolant.

[0074] Optionally, a blocking member 1055 is provided in the cavity of the first partition 106. Two blocking members 1055 are provided, and the two blocking members 1055 are spaced apart. The space between the two blocking members 1055 forms the communication channel 103. That is, the two blocking members 1055 separate and seal the cavity of the first partition 106, thereby limiting the scope of the flow channel.

[0075] In this embodiment, the two sealing members 1055 are spaced apart to clearly define a specific connecting channel 103, so that the gas generated in the battery compartment 101 can only flow in the predetermined channel, avoiding disordered diffusion in the cavity of the first partition 106, reducing turbulence and resistance during gas transmission, and greatly improving exhaust efficiency.

[0076] Optionally, the first partition 106 has at least three cavities, at least two of which are arranged along the height direction of the box body 1 , and two adjacent cavities are separated by a partition. The two cavities at the top are connected to each other and form a connecting channel 103 .

[0077] In this embodiment, by using partitions to separate the different cavities within the first divider 106, the functions of different areas can be effectively isolated. For example, the bottom cavity can be used exclusively for structural support or routing other wiring harnesses or piping, while the top cavity is focused on gas circulation. This prevents the functions of different cavities from interfering with each other and improves space utilization within the first divider 106.

[0078] refer to Figure 1 and Figure 2 As shown, in some embodiments provided by the present invention, the side panel 105 includes a first end beam 1051, a second end beam 1052, a side beam 1053 and an oblique beam 1054. The first partition 106 can be a partition beam.

[0079] There are two side beams 1053, which are spaced apart. The first ends of the two side beams 1053 are connected by a first end beam 1051. The second ends of the two side beams 1053 are connected to corresponding inclined beams 1054. The ends of the two inclined beams 1054 away from the side beams 1053 are inclined toward each other and connected by a second end beam 1052.

[0080] Accordingly, the two ends of the first partition 106 are respectively connected to the two inclined beams 1054, and there is a distance between the first partition 106 and the first end beam 1051 to form the functional compartment 102. The connection between the first partition 106 and the inclined beam 1054 is located between the two ends of the inclined beam 1054, or in other words, there is a distance between the connection between the first partition 106 and the inclined beam 1054 and both ends of the inclined beam 1054.

[0081] The communication channel 103 is disposed within the inclined beam 1054, and the first port 1031 is disposed on the side wall of the inclined beam 1054 located at the battery compartment 101, and the second port 1032 is disposed on the side wall of the inclined beam 1054 located at the functional compartment 102. Of course, the communication channel 103 can also be disposed within the first partition 106, with the first port 1031 and the second port 1032 respectively disposed on opposite side walls of the first partition 106.

[0082] In this embodiment, two side beams 1053 are used and connected through the first end beam 1051, the oblique beam 1054 and the second end beam 1052 to form a stable frame structure, thereby increasing the mechanical strength of the entire box body 1.

[0083] In addition, the first partition 106 is connected between the two oblique beams 1054 and forms a gap with the first end beam 1051, so that the functional compartment 102 is located at the end of the box body 1, physically isolating the high-voltage control module and the battery to avoid electromagnetic interference or heat diffusion.

[0084] A connecting channel 103 is set inside the inclined beam 1054, and the first port 1031 is located on the side of the battery compartment 101, and the second port 1032 is located on the side of the functional compartment 102. The space inside the inclined beam 1054 can be fully utilized to achieve effective gas transfer without occupying additional space.

[0085] Optionally, any two of the first end beam 1051 , the second end beam 1052 , the side beam 1053 and the oblique beam 1054 that are connected to each other may be connected by welding.

[0086] In some embodiments provided herein, the functional compartment 102 includes an electrical chamber 1021 and exhaust chambers 1022 disposed on either side of the electrical chamber 1021. Specifically, there are two exhaust chambers 1022, one on each side of the battery compartment. The electrical chamber 1021 can be used to house the high-voltage control module, while the exhaust chambers 1022 can be used to discharge gases during thermal runaway of the battery.

[0087] Furthermore, the exhaust chamber 1022 and the electrical chamber 1021 are independent of each other, and the exhaust chambers 1022 are connected to the battery compartment 101 through corresponding connecting channels 103 . An explosion-proof valve 3 is provided at a position corresponding to each exhaust chamber 1022 of the cover assembly 2 .

[0088] In this embodiment, the electrical chamber 1021 is specifically used to arrange electrical equipment such as high-voltage control modules. It is independent of the exhaust chamber 1022 to avoid direct impact and interference of the high-temperature, high-pressure gas and possible impurities generated during the thermal runaway exhaust process on the electrical equipment in the electrical chamber 1021.

[0089] In addition, the high-voltage control module has high requirements for the working environment. The independent electrical room 1021 can maintain relatively stable temperature, humidity and cleanliness, reduce electrical failures caused by environmental factors, and ensure the stable operation of the high-voltage control module.

[0090] Furthermore, each exhaust chamber 1022 is equipped with an explosion-proof valve 3 and connected to the battery compartment 101 via an independent communication channel 103, forming a parallel exhaust path. If thermal runaway occurs on one side of the battery module, the nearest exhaust chamber 1022 quickly responds by releasing pressure, preventing long-distance gas migration and pressure accumulation. If both sides experience thermal runaway simultaneously, the dual valves work together to double the exhaust efficiency, preventing overpressure and rupture of the housing 1.

[0091] In addition, each exhaust chamber 1022 is equipped with an explosion-proof valve 3 and a corresponding communication channel 103, so that even if the exhaust path on one side is blocked or fails, the other side can still provide an effective pressure relief path, greatly enhancing the redundancy and reliability of the system.

[0092] refer to Figure 1 and Figure 2As shown, optionally, the box assembly further includes a second partition 107 , for example, the second partition 107 is configured as a partition beam.

[0093] There are two second partitions 107 , both of which are arranged in the functional compartment 102 . The two second partitions 107 are arranged at intervals, and both ends of the second partition 107 are connected to the first end beam 1051 and the first partition 106 respectively.

[0094] Correspondingly, the space between the two second partitions 107 is the electrical chamber 1021, and the space between the second partition 107 and the inclined beam 1054 is the exhaust chamber 1022. The two inclined beams 1054 are each provided with a corresponding communication channel 103.

[0095] In this embodiment, the second partition 107 can increase the internal support of the entire box 1, for example, improve the support effect on the side wall 105, so that the battery pack is more stable when subjected to external impact or vibration, which helps to maintain the integrity of the overall structure and reduce the risk of deformation.

[0096] In addition, the second partition 107 clearly separates the electrical chamber 1021 from the exhaust chamber 1022, which can effectively prevent the electrical components from being damaged by high-temperature gas, flame or explosion generated during thermal runaway.

[0097] In some embodiments provided by the present invention, the cover plate assembly 2 includes a first cover plate 201 , a second cover plate 202 and a third cover plate 203 .

[0098] The first cover plate 201 covers the battery compartment 101 , the second cover plate 202 covers the electrical chamber 1021 , and the third cover plate 203 covers the exhaust chamber 1022 . An explosion-proof valve 3 is provided on the third cover plate 203 .

[0099] In this embodiment, the first cover plate 201 , the second cover plate 202 and the third cover plate 203 are provided so that when repairing a certain area, other areas will not be excessively disturbed.

[0100] For example, when repairing equipment in the electrical room 1021, there is no need to open the first cover 201, which prevents coolant leakage in the battery compartment 101 or damage to the battery structure. This can reduce maintenance difficulty and cost, and reduce the risk of damage to other components due to misoperation.

[0101] In addition, each cover can be individually designed and manufactured according to actual needs, providing greater flexibility. For example, the thickness or material of the corresponding cover can be set according to the different sealing or protection requirements of the battery compartment 101, the electrical chamber 1021, and the exhaust chamber 1022.

[0102] In addition, the cover plate assembly 2 is configured as a split structure, which facilitates the processing, transportation and assembly of the cover plate assembly 2, thereby reducing the processing difficulty, transportation difficulty and assembly difficulty of the cover plate assembly 2.

[0103] refer to Figure 4-Figure 7 As shown, in some embodiments provided by the present invention, the box assembly further includes a baffle 4.

[0104] Specifically, the baffle 4 is disposed outside the cover assembly 2 and is connected to the box body 1 and / or the cover assembly 2. For example, the baffle 4 is disposed outside the third cover plate 203, and a threaded fastener sequentially passes through the baffle 4 and the third cover plate 203 and is threadedly connected to the box body 1. For example, the threaded fastener is threadedly connected to any one of the first partition 106, the second partition 107, and the side panel 105 of the box body 1.

[0105] Furthermore, the baffle 4 covers the explosion-proof valve 3 , and the baffle 4 is formed with a discharge port facing the horizontal direction.

[0106] In this embodiment, the baffle 4 forms a discharge port facing the horizontal direction, which can change the flow direction of the thermal runaway exhaust. Specifically, when the battery thermally runs away and the explosion-proof valve 3 opens to exhaust, the baffle 4 guides the high-temperature and high-pressure gas that was originally discharged vertically upward or irregularly to be discharged horizontally.

[0107] For example, this can prevent exhaust from directly hitting objects or people above, reducing safety hazards caused by hot air shock. Especially in some application scenarios with limited space, it can effectively prevent hot air accumulation from causing secondary dangers, making the exhaust process safer and more controllable.

[0108] In addition, the baffle 4 provides additional physical protection for the explosion-proof valve 3. For example, even if the battery pack is subjected to external impact or other mechanical damage, the baffle 4 can effectively prevent direct damage to the explosion-proof valve 3, ensuring that it can work normally in an emergency.

[0109] In some embodiments provided by the present invention, the discharge port is provided at an edge of the baffle 4 close to the outer side of the box body 1 , and the discharge port faces the outer side of the box body 1 .

[0110] In this embodiment, the exhaust port is arranged near the outer edge of the box body 1 and facing outward, so that the high-temperature gas can be quickly and directly discharged into the vast space outside the box body 1, which can greatly improve the heat dissipation efficiency and quickly reduce the internal temperature of the battery pack.

[0111] Furthermore, when the gas is discharged from the discharge port near the outer edge of the box body 1 and toward the outside, the airflow direction is away from other sensitive components inside the battery pack, such as electrical circuits and sensors. This can prevent the thermal radiation and pressure shock of the high-temperature and high-pressure gas from adversely affecting these components.

[0112] Optionally, the discharge port is arranged at the edge of the baffle 4 close to the inclined beam 1054, and the discharge port is arranged toward the outside of the inclined beam 1054.

[0113] refer to Figure 6 As shown, in some embodiments provided by the present invention, a first recess 401 is provided on the surface of the baffle plate 4 close to the cover plate assembly 2. The first recess 401 is opposite to the explosion-proof valve 3 and extends to the edge of the baffle plate 4, so that a discharge port is formed between the edge of the baffle plate 4 and the cover plate assembly 2. For example, the first recess 401 can be formed by stamping, and a protrusion can be formed on the surface of the baffle plate 4 away from the box body 1.

[0114] In this embodiment, first recess 401 is positioned opposite explosion-proof valve 3 and extends to the edge of baffle 4 to form a discharge port. This creates a precise flow path for high-temperature, high-pressure gases released during thermal runaway, enabling more efficient gas discharge. For example, when explosion-proof valve 3 is opened, the gas preferentially enters first recess 401 and then flows horizontally out of housing 1 through the discharge port, following the direction guided by the recess.

[0115] In addition, the setting of the first recess 401 is equivalent to forming a convex rib on the surface of the baffle 4 away from the box body 1, which can improve the strength of the baffle 4 and help maintain the shape stability and protective performance of the baffle 4. At the same time, the formation of the first recess 401 provides a protective space for the explosion-proof valve 3. Even if there is a slight collision or foreign objects contact the baffle 4 from the outside, it is not easy to directly touch the explosion-proof valve 3 and affect the function of the explosion-proof valve 3.

[0116] Of course, the first recess 401 is not limited to extending to the edge of the baffle 4. For example, in some embodiments not shown, the first recess 401 is spaced apart from the circumferential edge of the baffle 4. The first recess 401 forms a protrusion on the surface of the baffle 4 facing away from the box body 1, and a through hole is provided on the side wall of the protrusion to form a discharge port.

[0117] In some embodiments provided herein, a second recess 204 is provided on the cover assembly 2 at a position opposite to the functional compartment 102. The second recess 204 is provided on the surface of the cover assembly 2 away from the box body 1. For example, the second recess 204 is provided on the surface of the third cover plate 203 away from the box body 1. Alternatively, the second recess 204 can be formed by stamping, and a protrusion can be formed on the surface of the cover assembly 2 away from the box body 1.

[0118] Correspondingly, the explosion-proof valve 3 is disposed in the second recess 204 , and the protruding height of the explosion-proof valve 3 is less than or equal to the recessed depth of the second recess 204 .

[0119] In this embodiment, the second recess 204 is opposite to the position of the functional compartment 102, and the second recess 204 is recessed into the functional compartment 102. The existence of the second recess 204 allows the explosion-proof valve 3 to be embedded in the cover assembly 2 instead of protruding from the surface of the cover assembly 2, thereby helping to maintain the overall flatness of the cover assembly 2 and making the structure of the box assembly more compact, thereby reducing the space occupied by the box assembly and avoiding interference between the explosion-proof valve 3 and other components.

[0120] In addition, by placing the explosion-proof valve 3 in the second recess 204, additional physical protection can be provided for the explosion-proof valve 3. For example, even if there is a slight collision from the outside or foreign objects contact the cover assembly 2, it is not easy to directly affect the function of the explosion-proof valve 3.

[0121] In some embodiments provided by the present invention, the box assembly further includes a blocking cover 5.

[0122] The blocking cover 5 is arranged on the side wall of the functional compartment 102 and blocks the second port 1032. For example, the blocking cover 5 is arranged in the exhaust chamber 1022 and connected to the side wall of the inclined beam 1054. An exhaust port 501 is formed at one end of the blocking cover 5 close to the cover assembly 2.

[0123] In this embodiment, the gas in the communication channel 103 is discharged through the second port 1032 and then enters the blocking cover 5. After changing its flow direction through the blocking cover 5, it is discharged from the exhaust port 501. Liquid droplets carried by the gas collide with the inner wall of the blocking cover 5, where they converge and eventually flow back into the communication channel 103, achieving a gas-liquid separation function. This prevents the coolant from entering the functional chamber 102 along with the gas, ensuring that the explosion-proof valve 3 is dry.

[0124] Optionally, refer to Figure 2 As shown, a recess is provided on the surface of the blocking cover 5 near the second port 1032. The recess can be formed by stamping. The recess is opposite to the second port 1032 and extends to the edge of the blocking cover 5 near the cover assembly 2, so that an exhaust port 501 is formed between the edge of the blocking cover 5 and the side wall of the functional compartment 102.

[0125] Of course, the recess on the blocking cover 5 is not limited to extending to the edge of the blocking cover 5. For example, in some embodiments not shown, the recess of the blocking cover 5 is spaced apart from the edges of the blocking cover 5 on all sides. The recess forms a protrusion on the surface of the blocking cover 5 away from the second port 1032, and an opening is provided on the side wall of the protrusion close to the cover assembly 2 to form an exhaust port 501.

[0126] A battery pack is also provided in an embodiment of the present invention.

[0127] Specifically, the battery pack includes the box assembly as described above.

[0128] It should be noted that the battery pack includes the box assembly, and also includes all the above-mentioned advantages of the box assembly, so it will not be elaborated on.

[0129] Furthermore, batteries and coolant are provided in the battery compartment 101 of the box assembly. Optionally, the coolant level is greater than or equal to two-thirds of the height of the batteries.

[0130] A carrier is also provided in an embodiment of the present invention.

[0131] Specifically, the vehicle includes the above box assembly or the above battery pack.

[0132] The vehicle includes a battery pack, which also includes all the advantages of the battery pack mentioned above, so I will not go into details about this.

[0133] In addition, vehicles include but are not limited to vehicles and aircraft. Vehicles include but are not limited to pure electric vehicles and hybrid vehicles.

[0134] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A box assembly, characterized in that: include: A box (1), wherein a battery compartment (101) and a functional compartment (102) are provided in the box (1), and the box (1) is further provided with a communication channel (103), wherein the communication channel (103) has a first port (1031) and a second port (1032), wherein the first port (1031) is provided in the battery compartment (101) and allows gas in the battery compartment (101) to enter, and the second port (1032) is provided in the functional compartment (102); A cover plate assembly (2) connected to the top surface of the box body (1) and covering the battery compartment (101) and the functional compartment (102); An explosion-proof valve (3) is provided on the cover plate assembly (2) and is arranged opposite to the functional compartment (102).

2. The box assembly according to claim 1, characterized in that: The box body (1) comprises a bottom plate (104), side panels (105) and a first partition (106); The side enclosure (105) is arranged around the circumferential edge of the bottom plate (104) and encloses the bottom plate (104) to form a receiving space. The first partition (106) is arranged in the receiving space and is connected to the bottom plate (104) and the side enclosure (105) respectively. The first partition (106) divides the receiving space into the battery compartment (101) and the functional compartment (102). At least one of the side panel (105) and the first partition (106) is provided with the communication channel (103).

3. The box assembly according to claim 2, characterized in that: The side enclosure (105) is configured as a profile structure having a cavity inside, and the cavity inside the side enclosure (105) forms the communication channel (103); And / or, the first partition (106) is configured as a profile structure having a cavity inside, and the cavity inside the first partition (106) forms the connecting channel (103).

4. The box assembly according to claim 1, characterized in that: The functional compartment (102) comprises an electrical chamber (1021) and exhaust chambers (1022) arranged on both sides of the electrical chamber (1021); the exhaust chambers (1022) and the electrical chamber (1021) are independent of each other; the exhaust chambers (1022) are connected to the battery compartment (101) via corresponding communication channels (103); and the cover assembly (2) is provided with an explosion-proof valve (3) at a position corresponding to each exhaust chamber (1022).

5. The box assembly according to any one of claims 1 to 4, characterized in that: The box assembly further comprises a baffle (4), which is arranged on the outside of the cover assembly (2) and is connected to the box (1) and / or the cover assembly (2), the baffle (4) covers the explosion-proof valve (3), and the baffle (4) is formed with a discharge port facing the horizontal direction.

6. The box assembly according to claim 5, characterized in that: The discharge port is arranged at an edge of the baffle (4) close to the outside of the box body (1), and the discharge port faces the outside of the box body (1); And / or, a first recess (401) is provided on a surface of the baffle (4) close to the cover assembly (2), the first recess (401) is opposite to the explosion-proof valve (3), and the first recess (401) extends to the edge of the baffle (4), so that the discharge port is formed between the edge of the baffle (4) and the cover assembly (2).

7. The box assembly according to any one of claims 1 to 4, characterized in that: A second recess (204) is provided at a position of the cover assembly (2) relative to the functional compartment (102); the second recess (204) is provided on a surface of the cover assembly (2) away from the box body (1); the explosion-proof valve (3) is provided in the second recess (204), and a protruding height of the explosion-proof valve (3) is less than or equal to a recessed depth of the second recess (204).

8. The box assembly according to any one of claims 1 to 4, characterized in that: The box assembly further comprises a blocking cover (5), which is arranged on the side wall of the functional compartment (102) and blocks the second port (1032), and an exhaust port (501) is formed at one end of the blocking cover (5) close to the cover assembly (2).

9. A battery pack, characterized in that: Comprising the box assembly according to any one of claims 1-8.

10. A carrier, characterized in that: It includes the box assembly according to any one of claims 1 to 8 or the battery pack according to claim 9.

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