Battery box and energy storage device

Abstract

The application discloses a battery box and an energy storage device. The battery box comprises a box body and a sealing beam. The box body comprises end plates and side plates arranged adjacently. The end plate comprises a first main body part and a first mounting part. The first main body part is connected with the side plate. The first mounting part is connected with the first main body part. The first mounting part is provided with a first mounting hole along the length direction thereof. The sealing beam is connected with the side plate and the first mounting part. Compared with the prior art, the integrated design of the sealing beam and the first mounting part solves the problems of limited space of the sealing surface and the mounting surface, complex structure, and manufacturing difficulty in the conventional structure. By directly connecting the sealing beam with the first mounting part, the structure level is reduced, the casting and assembly process is simplified, and the manufacturing cost is reduced. The energy storage device adopting the battery box not only guarantees the mounting strength of the battery box, but also improves the sealing performance, and effectively meets the use requirements of the battery box in a harsh environment.

Description

Technical Field

[0001] This application relates to the field of new energy battery technology, and in particular to a battery box and energy storage device. Background Technology

[0002] With the continuous development of new energy vehicles and energy storage devices, the structural design of battery boxes, as an important component of battery systems, is receiving increasing attention. Battery boxes must have reliable mounting performance to ensure that they can be safely and securely installed on vehicles or other devices.

[0003] In existing technologies, the sealing structure and mounting structure of a battery box are typically designed separately. The sealing beam is used to seal the box, while the mounting part is used to fix and install the box. However, due to the limited space in the battery box and the close distance between the sealing surface and the mounting surface, it is difficult to form a complex structure that meets both sealing requirements and mounting functions within a limited space during integral casting. This not only increases the difficulty of the manufacturing process and raises production costs, but may also affect the structural strength and sealing effect of the battery box. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this application provides a battery box and energy storage device that effectively integrates the sealing structure and the mounting structure in a limited space, simplifies the manufacturing process, and improves the structural reliability.

[0005] To achieve the above objectives, this application adopts the following technical solution: A battery box includes a box body and a sealing beam. The box body includes an end plate and a side plate arranged adjacent to each other. The end plate includes a first main body and a first mounting part. The first main body is connected to the side plate, and the first mounting part is connected to the first main body. The first mounting part has a first mounting hole formed along its length direction. The sealing beam is connected to the side plate and is connected to the first mounting part.

[0006] In one embodiment, the first mounting portion extends away from the first main body portion, and the first mounting portion has a clearance groove. The sealing beam passes through the clearance groove and overlaps the first mounting portion.

[0007] In one embodiment, the end plate includes a first reinforcing rib, which connects the first mounting portion and the first main body portion respectively; the width of the first reinforcing rib gradually increases along the axial direction of the first mounting hole towards the first main body portion.

[0008] In one embodiment, there are multiple first reinforcing ribs, and the multiple first reinforcing ribs are arranged around the axis of the first mounting part.

[0009] In one embodiment, the first reinforcing rib includes a connecting surface and an inclined surface disposed opposite to each other along its width direction. The connecting surface is connected to the first mounting part and extends towards the first main body along the axial direction of the first mounting hole. The inclined surface extends obliquely away from the connecting surface. The angle between the inclined surface and the axis of the first mounting hole is α, where α ≥ 15°.

[0010] In one embodiment, the length of the first reinforcing rib is not less than 80 mm along the axial direction of the first mounting hole.

[0011] In one embodiment, the end plate includes an extension that is connected to the top of the first mounting portion and to the first main body portion.

[0012] In one embodiment, the extension is provided with multiple material reduction grooves.

[0013] In one embodiment, the end plate includes a second reinforcing rib, which is connected to the first main body and the extension respectively. Along the axial direction of the first mounting hole, the width of the second reinforcing rib gradually increases towards the first main body.

[0014] In one embodiment, there are multiple first mounting parts, and the multiple first mounting parts are arranged sequentially at intervals along the length direction of the first main body; the end plate also includes a reinforcing part, and at least some adjacent two first mounting parts are connected by the reinforcing part.

[0015] In one embodiment, the first mounting portion has a first sealing groove, which is arranged around the first mounting hole.

[0016] In one embodiment, the side plate includes a second main body and a second mounting part. The second main body is connected to the opposite ends of the first main body, and the second mounting part is connected to the side of the second main body close to the first main body. The second mounting part has a second mounting hole formed along its length.

[0017] In one embodiment, the second main body covers at least half of the outer side of the second mounting portion.

[0018] In one embodiment, the length of the second mounting part is less than the length of the first mounting part.

[0019] In one embodiment, one of the side plate and the sealing beam has a fixing part, and the other of the side plate and the sealing beam has a fixing groove, and the fixing part is inserted into the fixing groove.

[0020] This application also adopts the following technical solution to provide an energy storage device, including a battery box and a battery pack as described in any of the above embodiments, wherein the battery pack is disposed inside the battery box.

[0021] The beneficial effects of this application are as follows: This application provides a battery box and energy storage device. The battery box includes a box body and a sealing beam. The box body includes adjacent end plates and side plates. The end plates include a first main body and a first mounting part. The first main body is connected to the side plates, and the first mounting part is connected to the first main body. The first mounting part has a first mounting hole formed along its length. The sealing beam is connected to the side plates and to the first mounting part. Compared with the prior art, the integrated design of the sealing beam and the first mounting part solves the problems of limited space between the sealing surface and the mounting surface, complex structure, and difficult manufacturing in traditional structures. By directly connecting the sealing beam to the first mounting part, the structural layers are reduced, the casting and assembly processes are simplified, and the manufacturing cost is reduced. The energy storage device using this battery box not only ensures the mounting strength of the battery box but also improves the sealing performance, effectively meeting the usage requirements of the battery box in harsh environments. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of an energy storage device according to this application is shown; Figure 2 A schematic diagram of the structure of a battery box according to this application is shown; Figure 3 A schematic diagram of the structure of a box according to this application is shown; Figure 4 A cross-sectional schematic diagram of a battery box according to this application is shown; Figure 5 It shows Figure 3 Enlarged view of point A in the image; Figure 6 It shows Figure 3 Enlarged view of point B in the image; Figure 7 A cross-sectional schematic diagram of a battery box according to this application is shown; Figure 8 A schematic diagram of the structure of a sealing beam according to this application is shown; Reference numerals: 1. Box body; 11. Side plate; 111. Second main body; 112. Second mounting part; 1121. Second mounting hole; 1122. Second sealing groove; 113. Fixing part; 12. End plate; 121. First main body; 122. First mounting part; 1221. First sealing groove; 1222. First mounting hole; 123. First reinforcing rib; 124. Second reinforcing rib; 125. Extension part; 126. Material reduction groove; 127. Clearance groove; 128. Reinforcing part; 2. Sealing beam; 21. Fixing groove; 3. Battery pack. Detailed Implementation

[0023] In this application, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] See Figure 1 This application provides an energy storage device, including a battery box and a battery pack 3. The battery pack 3 is housed inside the battery box to ensure safety and stability. The battery box can be used in various application scenarios, such as electric vehicles and energy storage power stations, ensuring that the battery pack 3 is not affected by the external environment during transportation and use, thus extending its service life.

[0027] See Figure 2 and Figure 3 The battery box includes a box body 1 and a sealing beam 2. The box body 1 includes an end plate 12 and a side plate 11 arranged adjacent to each other. The end plate 12 includes a first main body 121 and a first mounting part 122. The first main body 121 is connected to the side plate 11, and the first mounting part 122 is connected to the first main body 121. The first mounting part 122 has a first mounting hole 1222 along its length direction. The sealing beam 2 is connected to the side plate 11 and is connected to the first mounting part 122.

[0028] In practical applications, the housing 1 can be a rectangular structure. Side plates 11 are provided at both ends of the housing 1 along its width direction. End plates 12 are connected to the side plates 11 to form the basic frame of the battery box. The end plates 12 include a first main body 121 for bearing external structural forces and a first mounting part 122 for mounting the housing 1. The first main body 121 is tightly connected to the side plates 11 by welding, screwing, or integral molding to ensure the overall structural strength of the housing 1.

[0029] The first mounting part 122 can be a protruding structure integrally formed with the end plate 12. The first mounting part 122 has a first mounting hole 1222 formed in its length direction. The first mounting hole 1222 is used to connect to the external structure or to the vehicle body structure, so that the battery box can be fixed to the vehicle chassis or other mounting base by hooks, bolts and other mounting parts in actual application.

[0030] The sealing beam 2 can be arranged along the edge of the end plate 12. The two ends of the sealing beam 2 can be fixedly connected to the side plates 11 on both sides, and the middle part is connected to the first mounting part 122 to form a sealing structure. The connection between the sealing beam 2 and the first mounting part 122 can be achieved by screwing, welding or integral molding, so that the sealing beam 2 is fastened to the edge of the box 1, effectively preventing the infiltration of external moisture, dust and other impurities, and ensuring the sealed environment inside the box 1.

[0031] It should be noted that the housing 1 typically comprises multiple housings stacked together. The bottom plate of the upper housing 1 forms the top plate of the lower housing 1. Adjacent housings 1 need to be sealed to ensure the battery pack is not affected by external factors. Furthermore, the housing 1 also needs to be sealed to the front panel (not shown in the figure), forming an installation space between the housing 1 and the front panel for installing water or electrical modules. Therefore, the sealing beam 2 is located at the edge of the end plate 12, sealing both the bottom plate of the upper housing 1 and the front panel, thus sealing both the battery pack and the installation space.

[0032] Compared to existing technologies, the integrated design of the sealing beam 2 and the first mounting part 122 solves the problems of limited space between the sealing surface and the mounting surface, complex structure, and difficult manufacturing in traditional structures. By directly connecting the sealing beam 2 to the first mounting part 122, the structural layers are reduced, casting and assembly processes are simplified, and manufacturing costs are lowered. At the same time, this structure not only ensures the mounting strength of the box 1, but also improves the sealing performance, providing better protection and effectively meeting the battery box's usage requirements in harsh environments.

[0033] See Figure 3 , Figure 4 and Figure 5The first mounting part 122 extends away from the first main body part 121. The first mounting part 122 has a relief groove 127. The sealing beam 2 passes through the relief groove 127 and overlaps the first mounting part 122.

[0034] In practical applications, the first mounting portion 122 extends away from the first main body portion 121, forming a structural component for mounting with an external structure. To optimize the arrangement and sealing effect of the sealing beam 2, a clearance groove 127 is formed on the first mounting portion 122. The clearance groove 127 is a groove structure opened along the width or length direction of the first mounting portion 122. The sealing beam 2 passes through the clearance groove 127, and a part of the sealing beam 2 extends through the clearance groove 127 to the side plate 11 and overlaps and is fixed with the first mounting portion 122.

[0035] Specifically, the shape and size of the clearance groove 127 are designed according to the cross-sectional shape of the sealing beam 2 to ensure that the sealing beam 2 can pass smoothly through the clearance groove 127 and form an overlapping structure with the first mounting part 122. For example, if the sealing beam 2 is a rectangular beam, the clearance groove 127 can be a rectangular groove to allow the sealing beam 2 to overlap. The overlap between the sealing beam 2 and the first mounting part 122 can be fixed by welding, riveting or sealing glue to ensure that the sealing beam 2 and the box 1 form a continuous sealing interface, effectively preventing the infiltration of external moisture, dust and other substances.

[0036] By passing the sealing beam 2 through the clearance groove 127 and overlapping it with the first mounting part 122, the sealing beam 2 can be efficiently integrated with the mounting structure within a limited space, avoiding the problem of mutual interference between the sealing structure and the mounting structure.

[0037] See Figure 5 The end plate 12 includes a first reinforcing rib 123, which is connected to the first mounting part 122 and the first main body part 121 respectively. Along the axial direction of the first mounting hole 1222, the width of the first reinforcing rib 123 gradually increases towards the first main body part 121.

[0038] In practical applications, the end plate 12 is provided with a first reinforcing rib 123, which is connected to the first mounting portion 122 and the first main body portion 121 respectively. Specifically, one end of the first reinforcing rib 123 is connected to the first mounting portion 122, and the other end is connected to the first main body portion 121, serving as a bridge and reinforcement. The first reinforcing rib 123 is arranged on both sides or below the first mounting portion 122, which can effectively disperse the load transmitted to the end plate 12 due to the mounting force, and improve the local and overall structural strength of the end plate 12.

[0039] Along the axial direction of the first mounting hole 1222, the width of the first reinforcing rib 123 gradually increases from the side away from the first main body 121 to the side closer to the first main body 121. That is, the first reinforcing rib 123 is narrower near the first mounting part 122 and gradually increases in width as it approaches the first main body 121, forming a wedge-shaped or trapezoidal transition. This structural design helps to more smoothly transfer the load borne by the mounting part to the end plate 12 as a whole, avoiding stress concentration and improving fatigue resistance.

[0040] See again Figure 5 There are multiple first reinforcing ribs 123, and the multiple first reinforcing ribs 123 are arranged around the axis of the first mounting part 122.

[0041] In practical applications, multiple first reinforcing ribs 123 are arranged in a ring around the axis of the first mounting portion 122. That is, with the axis of the first mounting hole 1222 as the center, multiple first reinforcing ribs 123 are evenly arranged or spaced at predetermined angles along the circumference of the axis to form a ring-shaped reinforcing structure; each first reinforcing rib 123 is connected to the first main body portion 121 and the first mounting portion 122 respectively. When the first mounting portion 122 bears external loads, the multiple ring-shaped first reinforcing ribs 123 can effectively disperse and transfer the load to various areas of the end plate 12, improving the torsional and deformation resistance of the first mounting portion 122.

[0042] For example, three first reinforcing ribs 123 can be set, with the three first reinforcing ribs 123 respectively set on both sides and below the first mounting part 122, and the circumferential angle can be 45° or 60° or other angles.

[0043] It should be noted that the cross-sectional dimensions, width gradient (e.g., gradually increasing width towards the first main body 121 along their respective length directions), and number of the multiple first reinforcing ribs 123 can be designed according to the dimensions of the first mounting part 122 and the actual stress requirements, and this application does not limit this.

[0044] See again Figure 5 and Figure 7 The first reinforcing rib 123 includes a connecting surface and an inclined surface that are disposed opposite to each other along its width direction. The connecting surface is connected to the first mounting part 122. The inclined surface extends inclinedly away from the connecting surface along the axial direction of the first mounting hole 1222 towards the first main body part 121. The inclined surface forms an angle α with the axis of the first mounting hole 1222, where α ≥ 15°.

[0045] In practical applications, the first reinforcing rib 123 includes a connecting surface and an inclined surface arranged opposite to each other along its width direction. The connecting surface is one side of the first reinforcing rib 123, which is tightly attached to and fixed to the surface of the first mounting part 122. It forms a firm connection with the first mounting part 122 by means of welding, riveting, or integral molding, ensuring that the first reinforcing rib 123 can effectively transfer the force of the first mounting part 122 to the first main body part 121 of the end plate 12, and ensuring that the force transmission between the first mounting part 122 and the first reinforcing rib 123 is continuous and firm.

[0046] The inclined surface is positioned opposite the connecting surface, and the extension direction of the inclined surface forms a certain angle with the axis of the first mounting hole 1222. Specifically, along the axis of the first mounting hole 1222, the inclined surface is inclined away from the connecting surface. As a result, the cross-sectional width of the first reinforcing rib 123 increases in the direction close to the first main body 121, forming a wedge-shaped or inclined widened structure, which further enhances the bending stiffness of the first reinforcing rib 123 in the direction of force.

[0047] To ensure the structural optimization of the first reinforcing rib 123, the included angle α formed between the inclined surface and the axis of the first mounting hole 1222 should be no less than 15° (i.e., α ≥ 15°). This design allows the first reinforcing rib 123 to better guide the force to the first main body 121 when under stress, reducing stress concentration and improving overall strength and fatigue resistance. The angle α can be selected as 20°, 30°, etc.

[0048] See again Figure 7 Along the axial direction of the first mounting hole 1222, the length of the first reinforcing rib 123 is not less than 80mm. For example, the first reinforcing rib 123 can be 90mm, 95mm, 100mm, etc., ensuring that the first reinforcing rib 123 can provide sufficient reinforcement in the area of ​​the first mounting part 122, significantly improving the overall rigidity and deformation resistance of the end plate 12 structure, and enhancing the safety and durability of the battery box under actual working conditions.

[0049] See again Figure 5 The end plate 12 includes an extension 125, which is connected to the top of the first mounting portion 122 and to the first main body portion 121.

[0050] In practical applications, one end of the extension 125 is connected to the top of the first mounting portion 122, and the other end is connected to the first main body portion 121, thereby forming a transition and reinforcement between the first mounting portion 122 and the first main body portion 121. This structure can disperse the stress on the top of the first mounting portion 122 when subjected to vertical or inclined loads and effectively transfer it to the first main body portion 121, reducing deformation or damage caused by load concentration.

[0051] In one embodiment, the extension 125 and a plurality of first reinforcing ribs 123 are respectively arranged around the first mounting portion 122 to form structural reinforcement of the first mounting portion 122 in multiple directions, thereby significantly improving the strength of the first mounting portion 122 itself.

[0052] See again Figure 5 The extension 125 is provided with multiple material reduction grooves 126.

[0053] In practical applications, the extension 125 serves as a crucial structure connecting the top of the first mounting section 122 to the first main body section 121, and it bears a certain mechanical load. To reduce material usage and overall weight while ensuring strength and rigidity, and to improve the structural efficiency of the end plate 12, multiple material reduction grooves 126 are provided on the extension 125. These grooves can be elongated, circular, elliptical, rectangular, or other common opening shapes. A 4mm gap can be reserved between adjacent material reduction grooves 126 to form a reinforced area, preventing the grooves from becoming too large and affecting the structural strength of the extension 125.

[0054] By opening multiple material reduction grooves 126 on the extension 125, the weight of the end plate 12 structure is reduced, the material utilization rate is improved, and the required mechanical properties are maintained, further meeting the dual requirements of lightweight and high strength for new energy vehicle battery boxes.

[0055] See again Figure 5 The end plate 12 includes a second reinforcing rib 124, which is connected to the first main body 121 and the extension 125 respectively. Along the axial direction of the first mounting hole 1222, the width of the second reinforcing rib 124 gradually increases towards the first main body 121.

[0056] In practical applications, the second reinforcing rib 124 can be a plate-like or rib-like structure, disposed in the connection area between the extension 125 and the first main body 121. One end of it is connected to the extension 125, and the other end is connected to the first main body 121, forming a structural reinforcement.

[0057] By incorporating a second reinforcing rib 124 and adopting a structural design where the width gradually increases along the axial direction of the first mounting hole 1222, the end plate 12 achieves a better stress distribution and deformation resistance at the first mounting portion 122. This design not only enhances the structural reliability and durability of the end plate 12 but also optimizes its overall rigidity and fatigue resistance, meeting the high-strength and long-life requirements of new energy vehicle battery boxes.

[0058] It is understandable that the second reinforcing rib 124 and the first reinforcing rib 123 can adopt the same cross-sectional dimensions and width gradient.

[0059] See again Figure 7 The number of first mounting parts 122 is multiple, and the multiple first mounting parts 122 are arranged sequentially at intervals along the length direction of the first main body 121; the end plate 12 also includes a reinforcing part 128, and at least some adjacent first mounting parts 122 are connected by a reinforcing part 128.

[0060] In practical applications, the first mounting part 122 can be a connecting part for attaching to the vehicle body or other structural components, and typically has a first mounting hole 1222. Multiple first mounting parts 122 are arranged sequentially at intervals along the length of the first main body 121, and each first mounting part 122 is connected to the first main body 121 via an extension 125. To further improve the overall rigidity and stability between the multiple mounting parts, the end plate 12 is provided with a reinforcing part 128 between at least two adjacent first mounting parts 122. The reinforcing part 128 can be a rib, reinforcing bar, transverse connecting plate, or other structures, connecting two adjacent extensions 125 or first mounting parts 122 to form a transverse or oblique reinforcing system. The reinforcing part 128 is firmly connected to two adjacent first mounting parts 122, which can be achieved through welding, integral stamping, or screwing, ensuring the strength and rigidity of the overall structure.

[0061] See again Figure 5 The first mounting part 122 has a first sealing groove 1221, which is arranged around the first mounting hole 1222.

[0062] In practical applications, the first sealing groove 1221 is preferably an annular groove, which is arranged around the end face of the first mounting part 122 with the first mounting hole 1222 as the center. The cross-section of the first sealing groove 1221 can be rectangular, semi-circular, or other geometric shapes suitable for accommodating the sealing ring.

[0063] The first sealing groove 1221 is coaxially arranged with the first mounting hole 1222, ensuring that the first sealing groove 1221 can effectively form an annular sealing fit with the mating parts (such as the body frame, crossbeam, mounting parts, etc.) when the fastening bolts or connectors pass through the first mounting hole 1222. The first sealing groove 1221 is provided on the end face of the first mounting part 122 facing the body or mounting parts.

[0064] See Figure 6 The side panel 11 includes a second main body 111 and a second mounting part 112. The second main body 111 is connected to the opposite ends of the first main body 121. The second mounting part 112 is connected to the side of the second main body 111 close to the first main body 121. The second mounting part 112 has a second mounting hole 1121 along its length direction. The second mounting hole 1121 is used to connect to an external structure.

[0065] In practical applications, the first main body 121 is the main load-bearing component of the end plate 12. Its two opposite ends are connected to the second main body 111 by means of mechanical connection, welding or integral stamping, so as to realize the overall frame forming of the end plate 12 and the side plate 11.

[0066] The side panel 11 includes a second main body portion 111 and a second mounting portion 112. The second main body portion 111 is the main load-bearing part of the side panel 11, used to bear the force transmission and protection requirements of the battery box in the lateral or longitudinal direction. The second mounting portion 112 can be located on the side of the second main body portion 111 near the first main body portion 121, that is, at the proximal edge where the side panel 11 connects to the end panel 12. The second mounting portion 112 can be a flange structure extending along the outer side of the side panel 11, forming a connection structure with the external vehicle body structure or mounting components.

[0067] The first mounting part 122 is mainly located in the middle of the box 1, and the second mounting part 112 is mainly located at the end of the box 1. The first mounting part 122 and the second mounting part 112 are used together to connect external structures at different locations, so that the battery box can be adapted to multiple different mounting positions.

[0068] See again Figure 6 The second main body 111 covers at least half of the outer side surface of the second mounting portion 112. In practical applications, the second mounting portion 112, as a key part connecting the side plate 11 to external structures such as the vehicle body or chassis, has its outer side partially or completely covered by the second main body 111. This significantly improves the overall strength, rigidity, and impact resistance of the second mounting portion 112, while providing better protection against external impacts, corrosion, and stress concentration. Furthermore, this structure helps reduce structural weakening caused by the machining or installation of the second mounting hole 1121.

[0069] See again Figure 7 The length of the second mounting part 112 is less than the length of the first mounting part 122. For clarity, Figure 7 In the figure, L1 is the length of the first mounting part 122, and L2 is the length of the second mounting part 112.

[0070] In practical applications, since the second mounting part 112 is integrated with the second main body part 111 and partially enclosed within the second main body part 111, the second mounting part 112 has higher strength, and its length can be designed to be shorter than that of the first mounting part 122, thus achieving structural lightweighting. The first mounting part 122, located in the middle of the end plate 12, is typically supported by first reinforcing ribs 123, and its structural strength is lower than that of the second mounting part 112. Therefore, it is designed to be longer, which effectively improves the structural strength of the first mounting part 122 itself.

[0071] It is understood that the second mounting part 112 is provided with a second sealing groove 1122. The second sealing groove 1122 is arranged around the second mounting hole 1121 and is located on the end face of the second mounting part 112. This ensures that when the second mounting hole 1121 is connected to an external structure, the second sealing groove 1122 can effectively form an annular sealing fit with the docking parts (such as the body frame, crossbeam, mounting parts, etc.).

[0072] See Figure 8 One of the side plate 11 and the sealing beam 2 has a fixing part 113, and the other of the side plate 11 and the sealing beam 2 has a fixing groove 21, and the fixing part 113 is inserted into the fixing groove 21.

[0073] In practical applications, the sealing beam 2 has fixing grooves 21 formed at its opposite ends along its length, and the side plate 11 has a fixing part 113 on the side facing the end plate 12. When the sealing beam 2 is installed in the housing 1, the fixing grooves 21 and the fixing part 113 are matched in a limiting manner, improving assembly accuracy. Then, the sealing beam 2 and the side plate 11 are welded together, achieving precise positioning and efficient connection between the two, which not only improves assembly efficiency and structural strength, but also enhances the sealing performance of the battery box.

[0074] 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.

[0075] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0076] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A battery box, characterized in that, include: The enclosure includes an adjacent end plate and a side plate. The end plate includes a first main body and a first mounting part. The first main body is connected to the side plate, and the first mounting part is connected to the first main body. The first mounting part has a first mounting hole along its length. A sealing beam is connected to the side plate and to the first mounting part.

2. The battery box according to claim 1, characterized in that, The first mounting part extends away from the first main body part, and the first mounting part has a clearance groove. The sealing beam passes through the clearance groove and overlaps the first mounting part.

3. The battery box according to claim 1, characterized in that, The end plate includes a first reinforcing rib, which connects the first mounting part and the first main body part respectively; along the axial direction of the first mounting hole, the width of the first reinforcing rib gradually increases towards the first main body part.

4. The battery box according to claim 3, characterized in that, There are multiple first reinforcing ribs, and the multiple first reinforcing ribs are arranged in a ring around the axis of the first mounting part.

5. The battery box according to claim 3, characterized in that, The first reinforcing rib includes a connecting surface and an inclined surface disposed opposite to each other along its width direction. The connecting surface is connected to the first mounting part and extends towards the first main body along the axial direction of the first mounting hole. The inclined surface extends inclinedly away from the connecting surface. The angle between the inclined surface and the axis of the first mounting hole is α, where α ≥ 15°.

6. The battery box according to claim 3, characterized in that, Along the axial direction of the first mounting hole, the length of the first reinforcing rib is not less than 80mm.

7. The battery box according to claim 1, characterized in that, The end plate includes an extension that is connected to the top of the first mounting portion and to the first main body portion.

8. The battery box according to claim 7, characterized in that, The extension is provided with multiple material reduction grooves.

9. The battery box according to claim 7, characterized in that, The end plate includes a second reinforcing rib, which is connected to the first main body and the extension respectively. Along the axial direction of the first mounting hole, the width of the second reinforcing rib gradually increases towards the first main body.

10. The battery box according to any one of claims 1 to 9, characterized in that, The number of the first mounting parts is multiple, and the multiple first mounting parts are arranged sequentially at intervals along the length direction of the first main body; the end plate also includes a reinforcing part, and at least some adjacent two first mounting parts are connected by the reinforcing part.

11. The battery box according to any one of claims 1 to 9, characterized in that, The first mounting part has a first sealing groove, which is arranged around the first mounting hole.

12. The battery box according to any one of claims 1 to 9, characterized in that, The side plate includes a second main body and a second mounting part. The second main body is connected to the opposite ends of the first main body. The second mounting part is connected to the side of the second main body close to the first main body. The second mounting part has a second mounting hole formed along its length.

13. The battery box according to claim 12, characterized in that, The second main body covers at least half of the outer side of the second mounting part.

14. The battery box according to claim 13, characterized in that, The length of the second mounting part is less than the length of the first mounting part.

15. The battery box according to any one of claims 1 to 9, characterized in that, One of the side plate and the sealing beam has a fixing part, and the other of the side plate and the sealing beam has a fixing groove, and the fixing part is inserted into the fixing groove.

16. An energy storage device, characterized in that, The battery box and battery pack according to any one of claims 1 to 15 are included, wherein the battery pack is disposed inside the battery box.

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