Battery box and electric appliance

Abstract

The application provides a battery box and an electric equipment. The battery box comprises a box body, has a containing cavity, and comprises a battery cell assembly contained in the containing cavity. A vent hole is arranged on the box body and communicates with the containing cavity. An explosion-proof valve is arranged on the outer side of the box body and corresponds to the position of the vent hole. The application can quickly release pressure and improves the safety and reliability of the product.

Description

Technical Field

[0001] This application relates to a battery box and electrical equipment, belonging to the field of new energy battery technology. Background Technology

[0002] With the rapid development of new energy technologies, battery boxes, as core energy storage components, are widely used in electric vehicles, energy storage power stations, electric ships, drones, helicopters and other low-altitude aircraft, as well as various other electrical equipment.

[0003] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: Currently, the structural strength and stability of battery boxes assembled from multiple box modules face challenges, and the design of cell fixing and heat dissipation also directly affects their safety performance and lifespan.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] This application provides a battery box and electrical equipment that can quickly release pressure, thereby improving the safety and reliability of the product.

[0006] This application provides a battery box, including:

[0007] The box-shaped enclosure has a receiving cavity;

[0008] The battery cell assembly is housed within the housing cavity;

[0009] The enclosure is equipped with a vent that is connected to the receiving cavity. An explosion-proof valve is located on the outside of the enclosure, and the position of the explosion-proof valve corresponds to that of the vent.

[0010] The beneficial effects of this application are: by placing the explosion-proof valve on the outside of the enclosure and corresponding to the vent hole, it ensures that the pressure can be quickly released through the vent hole and the explosion-proof valve in the event of battery thermal runaway, and also provides a certain degree of physical protection for the explosion-proof valve by utilizing the structure of the enclosure itself, effectively avoiding accidental damage to the explosion-proof valve due to external collisions, and improving the safety and reliability of the product.

[0011] In some alternative embodiments, the box includes a lid and a body, the body having an opening, the lid covering the opening, and the lid and body forming a receiving cavity.

[0012] It should be noted that by setting up a box consisting of a cover and a body, the structure is simple and facilitates the installation and maintenance of the battery cell assembly.

[0013] In some alternative implementations, the body is a carbon glass composite structure.

[0014] It should be noted that the main body adopts a carbon glass composite structure, which has the advantages of being lightweight, high-strength, and corrosion-resistant, and helps to achieve lightweight and high safety performance of the battery box.

[0015] In some alternative embodiments, the battery cell assembly includes a battery cell support and a plurality of battery cell bodies, the battery cell support being disposed in a housing and located within a receiving cavity;

[0016] The battery cell bracket has multiple mounting holes, and the battery cell body is placed inside the mounting holes. The multiple battery cell bodies and the multiple mounting holes correspond one-to-one.

[0017] It should be noted that the battery cell assembly adopts a structure in which the battery cell bracket and multiple mounting holes are used to fix each battery cell body independently and securely. This not only improves the structural stability, but also facilitates the heat dissipation and thermal management of the battery cells, thus extending their service life.

[0018] In some alternative embodiments, there are at least two boxes, and at least a first box and a second box include a first box and a second box, which are connected to each other along a first direction;

[0019] The battery cell assembly comprises at least two battery cell assemblies, including a first battery cell assembly and a second battery cell assembly, wherein the first battery cell assembly is located in a first housing and the second battery cell assembly is located in a second housing.

[0020] It should be noted that the structure of multiple cabinets spliced ​​together improves the flexibility and scalability of the design, and can adapt to different capacity and size requirements.

[0021] In some alternative embodiments, the first housing has a first flange and the second housing has a second flange, the first flange and the second flange being connected to connect the first housing to the second housing.

[0022] It should be noted that the first and second flanges provide a wide and flat contact surface for the connection between the first and second housings, resulting in high connection strength and ensuring the integrity of the assembled housing modules.

[0023] In some alternative embodiments, the battery box further includes a partition located between a first flange and a second flange along a first direction.

[0024] It should be noted that the separator can form a physical isolation barrier between two adjacent battery cell assemblies. When a cell in one battery cell experiences thermal runaway, the separator can effectively block the direct propagation of flames and high-temperature heat, delaying or preventing the accident from spreading to adjacent battery cells and keeping the fault within a minimum range. This is a key measure to improve the safety of large battery boxes.

[0025] In some alternative embodiments, the battery box further includes a reinforcing plate disposed on the first and second housings.

[0026] It should be noted that the reinforcing plate can tightly connect multiple independent box modules into a sturdy whole, which greatly improves the rigidity and bending and torsional resistance of the entire battery box, enabling it to withstand more demanding mechanical loads and vibration impacts, and meet the requirements of harsh operating environments.

[0027] In some alternative embodiments, there are multiple reinforcing plates, which are spaced apart on the first and second housings along the second direction;

[0028] Along the second direction, an exhaust hole is opened on the reinforcing plate located in the middle of the battery box, and an explosion-proof valve extends into the exhaust hole;

[0029] There is an angle between the second direction and the first direction.

[0030] It should be noted that an exhaust port is opened on the reinforcing plate located in the middle of the enclosure, and the explosion-proof valve extends into it. This design utilizes the structure of the reinforcing plate to provide additional housing and protection space for the explosion-proof valve without affecting its reinforcing function. At the same time, it may form a better pressure relief airflow channel, further improving safety performance.

[0031] In addition, this application also provides an electrical device, including the aforementioned battery box.

[0032] The battery box and electrical equipment provided in this application include the aforementioned battery box; the battery box includes a box body with a receiving cavity; and a battery cell assembly housed in the receiving cavity; wherein, the box body is provided with a vent hole that communicates with the receiving cavity, and an explosion-proof valve is provided on the outside of the box body, with the explosion-proof valve corresponding to the position of the vent hole.

[0033] By placing the explosion-proof valve on the outside of the enclosure and aligning it with the vent, it ensures rapid pressure relief through the vent and the explosion-proof valve in the event of battery thermal runaway. The enclosure's structure also provides physical protection for the explosion-proof valve, effectively preventing accidental damage due to external impacts and improving the product's safety and reliability. Attached Figure Description

[0034] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0035] Figure 1 This is a schematic diagram of the battery box structure according to an embodiment of this application;

[0036] Figure 2This is an exploded structural diagram of the battery box according to an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the battery cell assembly in the battery box according to an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of the structure of the main body of the battery box according to an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of the structure of the battery box cover according to an embodiment of this application;

[0040] Figure 6 This is a cross-sectional view of the battery box according to an embodiment of this application;

[0041] Figure 7 for Figure 6 A magnified view of a portion of point I in the middle;

[0042] Figure 8 for Figure 6 A magnified view of a section at point II;

[0043] Figure 9 This is a schematic diagram of the reinforcing plate in the battery box according to an embodiment of this application.

[0044] Figure label:

[0045] 100-Battery Box;

[0046] 110 - Enclosure;

[0047] 111 - First box;

[0048] 1111 - First flip;

[0049] 112 - Second box;

[0050] 113 - Box lid;

[0051] 114-Ontology;

[0052] 115 - Vent hole;

[0053] 120 - Battery cell assembly;

[0054] 121-Cell bracket;

[0055] 1211 - Mounting hole;

[0056] 122 - Battery cell body;

[0057] 130 - Explosion-proof valve;

[0058] 140-partition;

[0059] 150 - Reinforcing plate;

[0060] 151 - Exhaust port;

[0061] 160-Liquid cooling plate. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] In the process of conceiving and implementing this application, the applicant discovered at least the following problems: Currently, the structural strength and stability of battery boxes assembled from multiple box modules face challenges, and the design of cell fixing and heat dissipation also directly affects their safety performance and lifespan.

[0067] The battery box proposed in this application, by placing the explosion-proof valve on the outside of the box and corresponding to the vent, not only ensures that the pressure can be quickly released through the vent and the explosion-proof valve in the event of battery thermal runaway, but also provides a certain degree of physical protection for the explosion-proof valve by utilizing the structure of the box itself, effectively avoiding accidental damage to the explosion-proof valve due to external collisions, thereby improving the safety and reliability of the product.

[0068] The battery box provided in this application will be described in detail below with reference to specific embodiments.

[0069] Figure 1 This is a schematic diagram of the battery box structure according to an embodiment of this application. Figure 2 This is an exploded structural diagram of the battery box according to an embodiment of this application. Figure 3 This is a schematic diagram of the battery cell assembly in the battery box according to an embodiment of this application.

[0070] like Figures 1 to 3 As shown in the figure, this application embodiment proposes a battery box 100, including:

[0071] Box 110 has a receiving cavity;

[0072] The battery cell assembly 120 is housed within the receiving cavity;

[0073] The enclosure 110 is provided with a vent 115, which is connected to the receiving cavity. An explosion-proof valve 130 is provided on the outside of the enclosure 110, and the position of the explosion-proof valve 130 corresponds to that of the vent 115.

[0074] In some examples, the housing 110 can be a rectangular structure, and the size of the housing 110 can be greater than or equal to the size of the cell assembly, so that the housing 110 can support the cell assembly.

[0075] It is understandable that the housing 110 has a receiving cavity, the function of which is to receive the battery cell assembly. It is easy to understand that the receiving cavity is in a sealed state to prevent side reactions from occurring in the internal system of the battery cell assembly, thereby affecting the performance of the battery cell assembly.

[0076] For example, the size or shape of the receiving cavity is matched with the size and shape of the battery cell assembly. Specifically, it can be adjusted according to the actual situation. This application embodiment does not impose too many limitations here.

[0077] In this embodiment, the battery cell assembly can be configured as a rectangular structure. The battery cell assembly can be located inside the housing 110.

[0078] Understandably, housing 110 can be used to support battery cell assemblies.

[0079] The dimensions of the aforementioned housing 110 can be set according to actual needs, and this embodiment of the application does not impose any restrictions on them.

[0080] In addition, it should be noted that the shape of the box 110 is not limited in this embodiment. For example, the box 110 can be a regular shape such as a cuboid or a cylinder. Of course, the box 110 can also be other irregular shapes.

[0081] It should be noted that the enclosure 110 has an internal cavity for accommodating the battery cell assembly 120. A vent 115 is provided on the wall of the enclosure 110, which communicates with the cavity. An explosion-proof valve 130 is fixedly installed on the outside of the enclosure 110, and the position of the explosion-proof valve 130 corresponds precisely to the vent 115.

[0082] When the battery cell assembly 120 inside the battery box 100 experiences thermal runaway, causing a sharp increase in pressure inside the containment cavity, the high-temperature and high-pressure gas is rapidly discharged through the vent 115, thereby opening the explosion-proof valve 130 and preventing the box 110 from bursting.

[0083] It should be noted that by setting the vent 115 and the explosion-proof valve 130, a preset and controllable release channel is provided for the high-temperature and high-pressure gas generated during battery thermal runaway, which can effectively prevent the battery box 100 from exploding due to a sudden increase in internal pressure, thus fundamentally improving the safety of the battery system.

[0084] In some embodiments, the explosion-proof valve 130 is disposed on the outside of the housing 110, and the wall of the housing 110 can be used as a barrier to effectively prevent external objects from directly impacting the explosion-proof valve 130, thereby improving its operational reliability.

[0085] Specifically, the explosion-proof valve 130 is located on the outside of the enclosure 110, utilizing the enclosure 110's own structure (such as walls and ribs) to provide a physical barrier for the explosion-proof valve 130. This prevents the explosion-proof valve 130 from being damaged or malfunctioning due to accidental collisions, scratches, or accumulation of debris during transportation, installation, or daily use, ensuring that it can start and work normally at critical moments (in case of thermal runaway), greatly improving the reliability of the safety component.

[0086] With the above-mentioned configuration, namely, by placing the explosion-proof valve 130 on the outside of the housing 110 and corresponding to the vent 115, it is ensured that the pressure can be quickly released through the vent 115 and the explosion-proof valve 130 in the event of battery thermal runaway. At the same time, the structure of the housing 110 itself provides a certain degree of physical protection for the explosion-proof valve 130, effectively preventing the explosion-proof valve 130 from being accidentally damaged by external collisions, thereby improving the safety and reliability of the product.

[0087] Figure 4 This is a schematic diagram of the structure of the main body of the battery box according to an embodiment of this application. Figure 5 This is a schematic diagram of the structure of the battery box cover in an embodiment of this application.

[0088] like Figures 1 to 5 As shown, in some alternative embodiments, the box 110 includes a lid 113 and a body 114, the body 114 having an opening, the lid 113 covering the opening, and the lid 113 and the body 114 forming a receiving cavity.

[0089] It should be noted that by setting up the box 110, which consists of a cover 113 and a body 114, the structure is simple and facilitates the installation and maintenance of the battery cell assembly 120.

[0090] Furthermore, the separate cover 113 and body 114 structure allows the battery cell assembly 120 to be easily inserted into the receiving cavity through the opening of the body 114, greatly simplifying the assembly process and improving production efficiency. At the same time, when maintenance or replacement of internal components is required, only the cover 113 needs to be opened, making it highly maintainable.

[0091] In some embodiments, the body 114 has an opening, and a cover 113 is attached to the opening by means of bolts or welding, thereby forming a closed receiving cavity together with the body 114. This structure facilitates the insertion of the battery cell assembly 120 into the body 114 through the opening for assembly.

[0092] In some alternative implementations, the body 114 is a carbon glass composite structure.

[0093] It should be noted that the main body 114 adopts a carbon glass composite structure, which has the advantages of light weight, high strength and corrosion resistance, which helps to achieve the lightweight and high safety performance of the battery box 100.

[0094] Furthermore, carbon fiber and glass fiber composite materials have extremely high specific strength and specific modulus. While meeting the same structural strength requirements, their weight is much lighter than that of traditional metal housings 110 (such as steel and aluminum). This helps to reduce the weight of the entire battery box 100 and even the electrical equipment, which is crucial for improving the driving range of electric vehicles.

[0095] Furthermore, carbon glass composite material possesses excellent mechanical properties, providing higher rigidity and impact resistance for the enclosure 110. Simultaneously, this material exhibits good corrosion and chemical resistance, enabling it to withstand complex and harsh working environments and extending the service life of the battery enclosure 100.

[0096] In some embodiments, the body 114 may be made of carbon fiber-glass fiber composite material (carbon glass composite). This material has extremely high specific strength and specific modulus, which can significantly reduce the overall weight of the battery box 100, while providing excellent structural strength and impact resistance, meeting the dual requirements of lightweighting and high safety.

[0097] In some alternative embodiments, the battery cell assembly 120 includes a battery cell support 121 and a plurality of battery cell bodies 122, wherein the battery cell support 121 is disposed in the housing 110 and located within the receiving cavity;

[0098] The cell support 121 is provided with multiple mounting holes 1211, and the cell body 122 is disposed in the mounting holes 1211. The multiple cell bodies 122 and the multiple mounting holes 1211 correspond one-to-one.

[0099] It should be noted that the battery cell assembly 120 adopts a structure in which the battery cell bracket 121 cooperates with multiple mounting holes 1211, which can independently and stably fix each battery cell body 122. This not only improves the structural stability, but also facilitates the heat dissipation and thermal management of the battery cell, and extends the service life of the battery cell.

[0100] Furthermore, each cell body 122 is confined within its respective mounting hole 1211, forming a modular and stable structure. This design effectively prevents the cells from loosening, shifting, or rubbing against each other during vehicle operation or equipment vibration, improving the structural stability and reliability of the entire battery box 100 under dynamic operating conditions.

[0101] Furthermore, the gaps between the mounting holes 1211 provide heat dissipation space for the battery cells, facilitating airflow and preventing heat buildup caused by the tight packing of the cells. This creates favorable conditions for balancing the cell temperature and improving the thermal management performance of the battery pack 100.

[0102] In some embodiments, the cell support 121 is fixedly installed inside the body 114 of the housing 110 by means of bolts or clips, and is located in the receiving cavity.

[0103] The battery cell support 121 has multiple arrayed mounting holes 1211, and each battery cell body 122 is independently installed in one mounting hole 1211, achieving a one-to-one correspondence. This structure ensures that each battery cell body 122 can be firmly clamped, preventing loosening under vibration, while the gap between the mounting holes 1211 also facilitates heat dissipation and air circulation of the battery cell.

[0104] It should be noted that the cell body 122 is the smallest charging and discharging unit. The cell body 122 has a positive electrode, a negative electrode, and a separator disposed between the two, and is formed by winding or stacking.

[0105] The positive electrode sheet includes a positive current collector and a positive active material layer, which can be one or two layers; that is, the positive active material layer is located on one side of the positive current collector, or the positive active material layer is located on opposite sides of the positive current collector.

[0106] For example, the positive current collector can be made of metal materials such as aluminum foil, nickel foil, or stainless steel, or a composite foil formed by combining metal and insulating materials.

[0107] For example, the positive electrode active material layer includes a positive electrode active material, a conductive agent, a binder, etc., and the positive electrode active material includes one or more lithium-containing positive electrode active materials such as lithium iron phosphate, ternary materials containing nickel, cobalt, and manganese, and lithium manganese iron phosphate.

[0108] Similarly, the negative electrode sheet includes a negative current collector and a negative active material layer, which can be one or two layers; that is, the negative active material layer is located on one side of the negative current collector, or the negative active material layer is located on opposite sides of the negative current collector.

[0109] For example, the negative electrode current collector can be made of metal materials such as copper foil, aluminum foil, or stainless steel, or it can be a composite foil material formed by combining metal and insulating materials.

[0110] For example, the negative electrode active material layer includes a negative electrode active material, a conductive agent, a binder, etc., and the negative electrode active material includes one or more of the following: artificial graphite, natural graphite, silicon carbide, silicon oxide, lithium titanate, etc.

[0111] The tab serves as the current output terminal of the battery cell. The tab is connected as an integral part or separately from the positive or negative electrode.

[0112] The separator, as an insulating layer, is used to prevent short circuits inside the battery cell caused by contact between the positive and negative electrodes. As a semi-permeable layer, the separator prevents larger molecules from passing through while allowing smaller charged ions to pass through.

[0113] In some embodiments, the cell body 122 is a cylindrical cell.

[0114] It should be noted that cylindrical battery cells have a high degree of standardization and can be flexibly combined into modules of different shapes and capacities, making them particularly suitable for irregularly shaped battery boxes with limited space.

[0115] In some embodiments, the battery box 100 further includes a liquid cooling plate 160 located between two stacked battery cell bodies 122, forming a so-called double-sided cooling layout. Both large surfaces of the battery cell body 122 (typically the surfaces that generate the most heat) can contact the liquid cooling plate 160, resulting in a large heat exchange area and extremely high heat dissipation efficiency, which can effectively control the operating temperature of the battery cell and prevent overheating.

[0116] Furthermore, the liquid cooling plate 160 helps to keep the temperature of the cell body 122 within the cell assembly 120 uniform, avoiding local overheating or overcooling, thereby extending the life cycle and performance of the entire battery pack 100.

[0117] In some embodiments, the liquid cooling plate 160 is designed by extrusion or stamping process, and the bottom of the liquid cooling plate 160 is designed with a wave-like design or a flat design that is consistent with the bottom contour of the battery pack, so as to adapt to the wave-like design or flat design of the bottom plate of the housing 110.

[0118] In some alternative embodiments, there are at least two housings 110, and at least a first housing 111 and a second housing 112 are included, and the first housing 111 and the second housing 112 are connected to each other along a first direction.

[0119] There are at least two battery cell assemblies 120, including a first battery cell assembly 120 and a second battery cell assembly 120. The first battery cell assembly 120 is located inside the first housing 111, and the second battery cell assembly 120 is located inside the second housing 112.

[0120] It should be noted that the structure of multiple 110-cell units spliced ​​together improves the flexibility and scalability of the design, and can adapt to different capacity and size requirements.

[0121] In this embodiment, the battery box 100 is formed by splicing together at least two independent boxes 110 along the first direction X.

[0122] For ease of description, taking the first housing 111 and the second housing 112 as examples, the battery pack includes a first housing 111 and a second housing 112. Correspondingly, there are also two battery cell assemblies 120, namely a first battery cell assembly 120 housed in the first housing 111 and a second battery cell assembly 120 housed in the second housing 112. This modular design allows for flexible configuration of the battery pack 100's capacity.

[0123] In some alternative embodiments, the first housing 111 has a first flange 1111, the second housing 112 has a second flange, and the first flange 1111 and the second flange are connected to each other so that the first housing 111 and the second housing 112 are connected.

[0124] It should be noted that the first flange 1111 and the second flange provide a wide and flat contact surface for the connection between the first box 111 and the second box 112, resulting in high connection strength and ensuring the integrity of the multiple box 110 modules after splicing.

[0125] Furthermore, to achieve a reliable connection between the first housing 111 and the second housing 112, a first flange 1111 extending outward is provided at the mating edge of the first housing 111, and a second flange extending outward is provided at the mating edge of the second housing 112. The first flange 1111 and the second flange are fixedly connected together by fasteners such as bolts or rivets, thereby achieving a stable splicing of the first housing 111 and the second housing 112.

[0126] In some embodiments, the first flange 1111 and the second flange can be securely connected using various methods such as bolts.

[0127] In other embodiments, the first flange 1111 and the second flange can be fixed by adhesive.

[0128] In some embodiments, there are at least two vent holes 115, one of which is located on the first flange 1111 and the other on the second flange, with the positions of the at least two vent holes 115 corresponding to each other.

[0129] Figure 6 This is a cross-sectional view of the battery box according to an embodiment of this application. Figure 7 for Figure 6 A magnified view of a portion of point I in the middle. Figure 8 for Figure 6 A magnified view of a portion of point II.

[0130] like Figures 1 to 8 As shown, in some alternative embodiments, the battery box 100 further includes a partition 140 located between a first flange 1111 and a second flange along a first direction.

[0131] It should be noted that the separator 140 can form a physical isolation barrier between two adjacent battery cell assemblies 120. When a battery cell in one of the housings 110 experiences thermal runaway, the separator 140 can effectively block the direct propagation of flames and high-temperature heat, delaying or preventing the accident from spreading to adjacent housings 110 and keeping the fault within a minimum range. This is a key measure to improve the safety of the large battery box 100.

[0132] Furthermore, the partition 140 sandwiched in the middle can also increase the structural rigidity and overall stability of the connection.

[0133] In other words, to enhance the sealing and structural isolation performance of the connection, the battery box 100 also includes a partition 140. Along the first direction X, the partition 140 is sandwiched between the first flange 1111 and the second flange.

[0134] In some embodiments, the partition 140 may be made of insulating or fire-resistant material, which can serve as both electrical isolation and provide a certain fire barrier in the event of thermal runaway of a single enclosure 110.

[0135] Figure 9 This is a schematic diagram of the reinforcing plate in the battery box according to an embodiment of this application.

[0136] like Figures 1 to 9 As shown, in some alternative embodiments, the battery box 100 further includes a reinforcing plate 150, which is disposed on the first box body 111 and the second box body 112.

[0137] It should be noted that the reinforcing plate 150 can tightly connect multiple independent box modules 110 into a solid whole, which greatly improves the rigidity and bending and torsional resistance of the entire battery box 100, enabling it to withstand more demanding mechanical loads and vibration impacts, and meet the requirements of harsh operating environments.

[0138] Furthermore, in order to significantly improve the overall rigidity and bending and torsional resistance of the entire battery box 100, especially after the multiple boxes 110 are spliced ​​together, the battery box 100 also includes one or more reinforcing plates 150. The reinforcing plates 150 are installed across and fixedly on the top or bottom of the first box 111 and the second box 112.

[0139] It should be noted that by connecting the first flange 1111 and the second flange, and by adding the partition 140 and the reinforcing plate 150, the overall structural strength and rigidity of the multi-box 110 after splicing are greatly enhanced, ensuring the stability of the battery box 100 under harsh working conditions.

[0140] In some alternative embodiments, there are multiple reinforcing plates 150, which are spaced apart on the first housing 111 and the second housing 112 along the second direction.

[0141] Along the second direction, an exhaust hole 151 is provided on the reinforcing plate 150 located in the middle of the battery box 100, and an explosion-proof valve 130 extends into the exhaust hole 151.

[0142] There is an angle between the second direction and the first direction.

[0143] It should be noted that an exhaust port 151 is provided on the reinforcing plate 150 located in the middle of the housing 110, and the explosion-proof valve 130 extends into it. This design utilizes the structure of the reinforcing plate 150 to provide additional housing and protection space for the explosion-proof valve 130 without affecting its reinforcing function. At the same time, it may form a better pressure relief airflow channel, further improving safety performance.

[0144] Furthermore, this structure helps guide the flow of high-temperature gas during pressure relief, allowing it to be discharged more smoothly in the designated direction and preventing it from running around inside the battery box 100, thus further optimizing the pressure relief effect.

[0145] In some embodiments, there are multiple reinforcing plates 150, which are arranged at intervals along a second direction Y that forms an angle (e.g., perpendicular) to the first direction X. Vent holes 151 are provided on one or more reinforcing plates 150 located in the middle of the battery box 100.

[0146] The explosion-proof valve 130 on the housing 110 extends into this vent 151. This design has several advantages: First, the vent 151 provides additional housing space for the explosion-proof valve 130, preventing interference from the reinforcing plate 150; second, the reinforcing plate 150 itself forms a protective frame, further preventing impacts from the side; finally, this structure helps guide airflow during depressurization, creating a smoother exhaust path.

[0147] The battery box provided in this application includes a box body with a receiving cavity; a battery cell assembly is received in the receiving cavity; wherein, the box body is provided with a vent hole that communicates with the receiving cavity, and an explosion-proof valve is provided on the outside of the box body, the explosion-proof valve being positioned corresponding to the vent hole.

[0148] By placing the explosion-proof valve on the outside of the enclosure and aligning it with the vent, it ensures rapid pressure relief through the vent and the explosion-proof valve in the event of battery thermal runaway. The enclosure's structure also provides physical protection for the explosion-proof valve, effectively preventing accidental damage due to external impacts and improving the product's safety and reliability.

[0149] In addition, this application embodiment also provides an electrical device, including a battery box 100.

[0150] It should be noted that the electrical equipment can be, but is not limited to, electric vehicles, electric buses, electric trucks, electric construction machinery, energy storage containers, uninterruptible power supplies (UPS), electric ships, or electric aircraft. Because this electrical equipment utilizes the aforementioned safe, reliable, and structurally robust battery box 100, its overall safety and reliability are significantly improved.

[0151] It should be noted that the specific structure of the battery box 100 will not be limited here; please refer to the above.

[0152] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0153] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery box (100), characterized in that, include: The housing (110) has a receiving cavity; The battery cell assembly (120) is housed within the receiving cavity; The housing (110) is provided with a vent (115), which is connected to the receiving cavity. An explosion-proof valve (130) is provided on the outside of the housing (110), and the explosion-proof valve (130) is positioned corresponding to the vent (115).

2. The battery box (100) according to claim 1, characterized in that, The box (110) includes a lid (113) and a body (114), the body (114) having an opening, the lid (113) covering the opening, and the lid (113) and the body (114) forming the receiving cavity.

3. The battery box (100) according to claim 2, characterized in that, The body (114) is a carbon glass composite structure.

4. The battery box (100) according to claim 1, characterized in that, The battery cell assembly (120) includes a battery cell support (121) and a plurality of battery cell bodies (122). The battery cell support (121) is disposed in the housing (110) and located within the receiving cavity. The battery cell bracket (121) is provided with multiple mounting holes (1211), and the battery cell body (122) is disposed in the mounting holes (1211). The multiple battery cell bodies (122) and the multiple mounting holes (1211) correspond one-to-one.

5. The battery box (100) according to any one of claims 1-4, characterized in that, The box (110) is at least two, and the at least two boxes (110) include a first box (111) and a second box (112), and the first box (111) and the second box (112) are connected to each other along a first direction; The battery cell assembly (120) is at least two, and the at least two battery cell assemblies (120) include a first battery cell assembly (120) and a second battery cell assembly (120). The first battery cell assembly (120) is located inside the first housing (111), and the second battery cell assembly (120) is located inside the second housing (112).

6. The battery box (100) according to claim 5, characterized in that, The first box (111) has a first flange (1111), and the second box (112) has a second flange. The first flange (1111) and the second flange are connected to each other so that the first box (111) and the second box (112) are connected.

7. The battery box (100) according to claim 6, characterized in that, The battery box (100) also includes a partition (140) located between the first flange (1111) and the second flange along the first direction.

8. The battery box (100) according to claim 5, characterized in that, The battery box (100) also includes a reinforcing plate (150), which is disposed on the first box body (111) and the second box body (112).

9. The battery box (100) according to claim 8, characterized in that, There are multiple reinforcing plates (150), and along the second direction, multiple reinforcing plates (150) are spaced apart on the first box (111) and the second box (112); Along the second direction, an exhaust hole (151) is provided on the reinforcing plate (150) located in the middle of the battery box (100), and the explosion-proof valve (130) extends into the exhaust hole (151); There is an angle between the second direction and the first direction.

10. An electrical appliance, characterized in that, Includes the battery box (100) as described in any one of claims 1 to 9.

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