Battery case and battery pack

Abstract

Disclosed in the present invention are a battery case and a battery pack. The battery case comprises a bottom plate, an enclosure frame and a partition beam assembly. The enclosure frame is arranged around the bottom plate, the enclosure frame is fixedly connected to the bottom plate, and the bottom plate and the enclosure frame form an accommodating compartment, which is configured to place a battery therein. The partition beam assembly comprises a first beam body, a second beam body and a first connecting component, wherein the first beam body extends in a first direction, and the second beam body extends in a second direction, the first direction and the second direction being arranged at a first included angle which ranges from 85° to 95°, and both being parallel to a large surface of the bottom plate; by means of the partition beam assembly, the accommodating compartment is partitioned into a plurality of sub-accommodating compartments; and the first connecting component comprises two first side plate portions and a first bottom plate portion, which are connected to each other, wherein the first bottom plate portion is fixedly connected to the first beam body in the second direction, the two first side plate portions are arranged spaced apart in the first direction and are both connected to the second beam body in the first direction, and the projection of the second beam body in the second direction covers the first bottom plate portion.

Description

A battery housing and battery pack

[0001] This application claims priority to Chinese Patent Application No. 202411604062.3, filed on November 12, 2024, entitled "A Battery Housing and Battery Pack", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of battery enclosure technology, specifically to a battery enclosure and a battery pack. Background Technology

[0003] Electric vehicles typically incorporate a partition beam assembly within their battery compartment. This assembly divides the internal space of the battery compartment into multiple relatively independent sub-compartments, each designed to house the battery. However, current technologies often suffer from flawed structural designs for these partition beam assemblies, resulting in them excessively encroaching on the battery compartment's internal space and potentially interfering with battery installation.

[0004] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects remains a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a battery housing and a battery pack, wherein the partition beam assembly inside the battery housing can occupy relatively little internal space of the battery housing, is less likely to interfere with the battery, and facilitates battery installation.

[0006] To solve the above-mentioned technical problems, the present invention provides a battery box, including a base plate, a frame, and a partition beam assembly. The frame surrounds the base plate and is fixedly connected to the base plate. The base plate and the frame enclose a storage compartment for holding multiple batteries. The partition beam assembly includes a first beam, a second beam, and a first connecting component. The first beam extends along a first direction, and the second beam extends along a second direction. The first direction and the second direction form a first angle between 85° and 95°. Both the first direction and the second direction are parallel to the large surface of the base plate. The first beam and the second beam divide the storage compartment into multiple sub-storage compartments. The first connecting component includes a first base plate portion and two first side plate portions connected together. The first base plate portion is fixedly connected to the first beam along the second direction. The two first side plate portions are spaced apart along the first direction, and both first side plate portions are connected to the second beam along the first direction. The projection of the second beam along the second direction covers the first base plate portion.

[0007] In the above solution, the projection of the second beam along the second direction covers the first base plate, which is equivalent to using the installation space of the second beam to accommodate the first base plate. The first base plate does not extend out of the second beam along the first direction, thus reducing the space occupied inside the battery box. At the same time, it can also reduce the possibility of interference between the first connecting component and the battery inside the battery box, facilitate the installation of the battery inside the battery box, allow more space inside the battery box for battery installation, and also help improve the energy density of the battery box.

[0008] Optionally, the first side plate portion is located within the cavity of the second beam.

[0009] Optionally, the second beam includes two second beam plates arranged opposite each other along a third direction, the third direction and the first direction and the second direction are all arranged at a second included angle, the second included angle is between 85° and 95°, one of the two second beam plates is provided with a clearance notch; the dimension of the first connecting member in the second direction is L1, the dimension of the clearance notch in the second direction is L2, the dimension of the second beam in the second direction is L3, 0.3×L3≥L2≥L1.

[0010] Optionally, the first side plate is located on the outside of the second beam, and the thickness of the first side plate is between 0.5 mm and 3 mm.

[0011] Optionally, the first side plate portion has an insulating layer on at least one side facing away from the second beam along the first direction.

[0012] Optionally, the second direction is the front-rear direction of the vehicle, the thickness of the first beam is greater than the thickness of the second beam, the second beam is provided with a slot extending along a third direction, the third direction is set at an angle to both the first direction and the second direction, and the first beam is inserted into the slot along the third direction.

[0013] Optionally, the system further includes a second connecting component, which comprises a second base plate, two second side plates, and two wing plates. The second base plate is connected to the two second side plates and the two wing plates respectively. The second base plate is disposed on the upper part of the second beam and fixedly connected to the second beam. The large surface of the second base plate is parallel to the first surface of the second beam. The second side plates are parallel to the second surface of the second beam. The first surface and the second surface are arranged at a third angle, which is between 60° and 120°. The two wing plates are disposed on the upper part of the first beam and fixedly connected to the first beam. The wing plates are parallel to the first surface. The second beam has a larger dimension along a third direction than the first beam. The third direction and both the first and second directions are arranged at a second angle, which is between 85° and 95°.

[0014] Optionally, the projection of the slotted portion along the first direction is rectangular, and the sum of the dimensions of the first beam and the two first base plates in the second direction is adapted to the dimension of the slotted portion in the second direction.

[0015] Optionally, the slotted portion includes a first slot segment and a second slot segment, the second slot segment being closer to the slot opening of the slotted portion than the first slot segment, and the dimension of the second slot segment in the second direction being greater than the dimension of the first slot segment in the second direction; the dimension of the first beam body in the second direction is adapted to the dimension of the first slot segment in the second direction, and the sum of the dimensions of the second beam body and the two first base plate portions in the second direction is adapted to the dimension of the second slot segment in the second direction.

[0016] Optionally, at least one of the first beam and the second beam is connected to the first connecting component by a combination of welding and connector connection.

[0017] Optionally, the ratio of the dimension of the first connecting component in the third direction to the dimension of the first beam in the third direction is between 0.6 and 1, the third direction is set at an angle to the first direction and the second direction, and the projection of the first beam along the second direction covers the first connecting component.

[0018] Optionally, a reinforcing portion is provided between the first base plate portion and the first side plate portion.

[0019] The present invention also provides a battery pack, including a battery housing and a plurality of batteries disposed inside the battery housing, wherein the battery housing is the battery housing described above. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0021] Figure 2 is a structural schematic diagram of the partition beam assembly;

[0022] Figure 3 is a partial enlarged view of the connection between the first beam and the second beam in Figure 2;

[0023] Figure 4 is an exploded view of Figure 3;

[0024] Figure 5 is a connection structure diagram of the first connecting component and the first beam in Figure 4;

[0025] Figure 6 is a structural diagram of the fit between the first connecting component and the second beam.

[0026] Figure 7 is a partial enlarged view of the second beam in the slotted section;

[0027] Figure 8 is a structural schematic diagram of the deformation scheme in Figure 7;

[0028] Figure 9 is a schematic diagram of the structure of the second connecting component;

[0029] Figure 10 is a structural schematic diagram of the second beam with an avoidance gap;

[0030] Figure 11 is a magnified view of the slotted part and the avoidance notch in Figure 10.

[0031] Reference numerals: 1000-Battery housing; 1100-Base plate; 1200-Frame; 1300-Separation beam assembly; 1400-Sub-accommodation compartment; 2000-Battery; 100-First beam; 200-Second beam; 200A-First surface; 200B-Second surface; 210-Second beam plate; 211-Avoidance notch; 220-Slotted portion; 221-First slot segment; 222-Second slot segment; 230-Slot bottom connection portion; 300-First connecting component; 310-First base plate portion; 311-First base plate connection hole; 320-First side plate portion; 321-First side plate connection hole; 330-Reinforcing portion; 400 - Second connecting component; 410 - Second base plate portion; 411 - Second base plate connecting hole; 420 - Second side plate portion; 421 - Second side plate connecting hole; 430 - Wing plate portion; 431 - Wing plate connecting hole. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] In embodiments of the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0035] The directional terms mentioned in the embodiments of the present invention, such as "inner" and "outer", are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to 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 the embodiments of the present invention.

[0036] In the description of embodiments of the present invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0037] Please refer to Figure 1, which is a schematic diagram of the structure of the battery pack provided in an embodiment of the present invention.

[0038] As shown in Figure 1, an embodiment of the present invention provides a battery pack, including a battery housing 1000 and a plurality of batteries 2000.

[0039] The battery housing 1000 includes a base plate 1100, a frame 1200, and a partition beam assembly 1300. The frame 1200 surrounds the base plate 1100 and is fixedly connected to the base plate 1100. Specific fixing methods include, but are not limited to, welding, screw connection, and riveting. The base plate 1100 and the frame 1200 enclose a receiving compartment for holding multiple batteries 2000. The partition beam assembly 1300 is disposed within the receiving compartment and connected to the frame 1200 to divide the receiving compartment into multiple sub-receiving compartments 1400, each sub-receiving compartment 1400 containing multiple batteries 2000.

[0040] As described in the background section, in related technologies, the structural design of the separator beam assembly lacks rationality, resulting in the separator beam assembly excessively encroaching on the internal space of the battery box and easily interfering with the battery, which is detrimental to battery installation. To address this, this invention also proposes a new separator beam assembly 1300.

[0041] Specifically, please refer to Figures 2-11. Figure 2 is a structural schematic diagram of the separator beam assembly of the battery box provided in an embodiment of the present invention; Figure 3 is a partial enlarged view of the connection between the first beam and the second beam in Figure 2; Figure 4 is an exploded view of Figure 3; Figure 5 is a connection structure diagram of the first connecting component and the first beam in Figure 4; Figure 6 is a cooperative structure diagram of the first connecting component and the second beam; Figure 7 is a partial enlarged view of the second beam at the slotted portion; Figure 8 is a structural schematic diagram of the deformation scheme in Figure 7; Figure 9 is a structural schematic diagram of the second connecting component; Figure 10 is a structural schematic diagram of the second beam with an avoidance notch; Figure 11 is a partial enlarged view of Figure 10 at the slotted portion and the avoidance notch.

[0042] As shown in Figures 2-6, in this embodiment of the invention, the partition beam assembly 1300 includes a first beam body 100, a second beam body 200, and a first connecting component 300.

[0043] The first beam 100 extends along a first direction X, and the second beam 200 extends along a second direction Y. The structural forms of the first beam 100 and the second beam 200 are not limited here, and can be determined according to actual usage needs, for example, both the first beam 100 and the second beam 200 can be tubular beams. The first direction X and the second direction Y are set at a first included angle, which can be between 85° and 95°, for example, 90°. Furthermore, both the first direction X and the second direction Y can be parallel to the large surface of the base plate 1100. It should be understood that the large surface of the base plate 1100 refers to the surface with a relatively large area within the base plate 1100. In this embodiment of the invention, the large surface can refer to the side of the base plate 1100 facing the receiving compartment.

[0044] The first connecting component 300 can be roughly U-shaped, including a first base plate portion 310 and two first side plate portions 320 connected to each other. The first base plate portion 310 is fixedly connected to the first beam 100 along the second direction Y. At this time, the two first side plate portions 320 are spaced apart along the first direction X, and both first side plate portions 320 are connected to the second beam 200 along the first direction X.

[0045] After the first beam 100, the second beam 200, and the first connecting component 300 are assembled, the projection of the second beam 200 along the second direction Y covers the first base plate 310. This effectively utilizes the installation space of the second beam 200 to accommodate the first base plate 310, preventing the first base plate 310 from extending beyond the second beam 200 along the first direction X, thus reducing its impact on the internal space of the battery box 1000. Simultaneously, it reduces the possibility of interference between the first connecting component 300 and the battery 2000 inside the battery box 1000, facilitating the installation of the battery 2000 within the battery box 1000, allowing for more space within the battery box 1000 to install the battery 2000, and also contributing to increased energy density of the battery box 1000.

[0046] In specific installation, the first base plate 310 and the first beam 100 can be connected first to fix the first connecting component 300 in the first beam 100, and then the first side plate 320 and the second beam 200 can be connected.

[0047] Here, the embodiments of the present invention do not limit the connection method between the first base plate portion 310 and the first beam 100, or the connection method between the first side plate portion 320 and the second beam 200. In practical applications, those skilled in the art can choose according to specific needs, as long as the requirements of use are met.

[0048] In a specific example, as shown in Figure 5, the first base plate portion 310 may be provided with a first base plate connecting hole 311, and the first side plate portion 320 may be provided with a first side plate connecting hole 321. The number and distribution of the first base plate connecting hole 311 and the first side plate connecting hole 321 are not limited here. In actual assembly, bolts, rivets, or other connecting parts can be prepared, and then these connecting parts can be used to pass through the first base plate connecting hole 311 and the first side plate connecting hole 321 respectively, thereby realizing the connecting parts connection between the first base plate portion 310 and the first beam 100, and between the first side plate portion 320 and the second beam 200 respectively.

[0049] Based on the aforementioned connecting components, a secondary connection can be made between the first base plate 310 and the first beam 100, and between the first side plate 320 and the second beam 200, using welding. This further enhances the connection reliability between the first connecting component 300, the first beam 100, and the second beam 200, thereby ensuring the structural strength of the partition beam assembly 1300 provided in this embodiment of the invention. During this secondary connection, since the first base plate 310 and the first beam 100, as well as the first side plate 320 and the second beam 200, are already connected by connecting components, there is virtually no relative displacement between the first base plate 310 and the first beam 100, and between the first side plate 320 and the second beam 200, which is more conducive to the implementation of the welding process.

[0050] It should be understood that either the first base plate portion 310 or the first side plate portion 320 can be installed and fixed by means of connecting, welding, snap-fit, or other connection methods, as long as the reliability requirements of the connection can be guaranteed.

[0051] In some alternative implementations, a reinforcing part 330 may also be provided between the first base plate portion 310 and the first side plate portion 320.

[0052] The reinforcing part 330 can improve the connection strength between the first base plate part 310 and the first side plate part 320, thereby effectively ensuring the structural strength of the first connecting component 300 itself. During installation and subsequent use, the angle between the first base plate part 310 and the first side plate part 320 is less likely to change, which reduces the possibility of relative rotation between the first side plate part 320 and the first base plate part 310. In this way, the connection strength between the first beam 100 and the second beam 200 can be better guaranteed.

[0053] The number, location, and structural form of the reinforcing parts 330 are not limited here. In practical applications, those skilled in the art can determine them according to specific needs. For example, a localized area at the connection between the first base plate portion 310 and the first side plate portion 320 can be stamped to form an inwardly convex protrusion between the first base plate portion 310 and the first side plate portion 320. This protrusion can serve as the aforementioned reinforcing part 330. Two (as shown in Figure 5) or more reinforcing parts 330 can be configured between one first side plate portion 320 and one first base plate portion 310 to ensure the reinforcing effect of the reinforcing parts 330.

[0054] In some alternative implementations, as shown in Figures 7 and 8, the second beam 200 may be provided with a slotted portion 220 extending in the third direction Z. Specifically, the second beam 200 may be inserted into the first beam 100 and mounted on the first connecting member 300 in the third direction Z through the slotted portion 220.

[0055] The third direction Z and the aforementioned first direction X and second direction Y can all be set at a second included angle, which can be between 85° and 95°, for example, 90°. In a specific example, the battery box 1000 provided in this embodiment of the invention is installed inside a vehicle, and the vehicle is on a horizontal ground. In this case, the first direction X and the second direction Y can both be in the horizontal plane, while the third direction Z can be perpendicular to the horizontal plane. The third direction Z can also be referred to as the up-down direction or the vertical direction.

[0056] The second beam 200 may also have a groove bottom connecting portion 230 on the side of the slotted portion 220 along the third direction Z, that is, the slotted portion 220 does not penetrate the second beam 200 along the third direction Z. With this configuration, when the second beam 200 is inserted into the first beam 100, the second beam 200 can be supported by the groove bottom connecting portion 230 and the first beam 100 in the third direction Z, which can ensure the relative position of the second beam 200, the first beam 100 and the first connecting component 300 in the third direction Z, thereby facilitating the connection between the second beam 200 and the first connecting component 300. Meanwhile, the first beam 100 can support the second beam 200 along the third direction Z, and can also reduce the shear force along the third direction Z at the connection between the first base plate 310 and the first beam 100, as well as at the connection between the first side plate 320 and the second beam 200. This is beneficial to ensuring the connection reliability between the first base plate 310 and the first beam 100, as well as the connection reliability between the first side plate 320 and the second beam 200. This is of positive significance for ensuring the connection strength and service life of the first beam 100 and the second beam 200.

[0057] In some alternative implementations, as shown in Figures 3 and 6, after the second beam 200 and the first beam 100 are inserted, the first side plate portion 320 may be located outside the second beam 200, that is, in the first direction X, the second beam 200 may be inserted as a whole between the two first side plate portions 320.

[0058] With this design, the second beam 200 is less likely to interfere with the first side plate 320 during insertion into the first beam 100, thus improving the ease of insertion for both beams. Furthermore, since there is no need to create a notch on the second beam 200 to avoid the first side plate 320, the impact on the structural strength of the second beam 200 is reduced, further ensuring its structural strength.

[0059] In this implementation, the thickness of the first side panel 320 can be controlled between 0.5mm and 3mm. In this way, the first side panel 320 can occupy relatively little space inside the battery box 1000.

[0060] In this implementation, the first side plate portion 320 may also have an insulating layer (not shown in the figure) on at least one side facing away from the second beam 200 along the first direction X. This insulating layer may be an insulating coating made of materials such as silicon nitride, silicon oxide, or silicon oxynitride, and may be formed by processes such as electro-spraying or electroplating. It is used to achieve electrical isolation between the battery 2000 and the like, which can reduce the occurrence of short circuits and help ensure the safety of the battery box 1000 during use.

[0061] In one embodiment, as shown in Figure 7, the projection of the slotted portion 220 along the first direction X can be rectangular. The sum of the dimensions of the first beam 100 and the two first base plate portions 310 in the second direction Y can be adapted to the dimension of the slotted portion 220 in the second direction Y. It should be noted that, in this embodiment of the invention, "adapted" means approximately equal.

[0062] Specifically, referring to Figures 5-7, the dimension of the slotted portion 220 in the second direction Y can be D3, the dimension of the first beam 100 in the second direction Y can be D1, and the dimension of the first base plate portion 310 in the second direction Y can be D2. The first beam 100 has first connecting parts 300 on both sides in the second direction Y. D3 and (D1+2D2) can be matched, that is, they can be approximately equal, so that the second beam 200 can be inserted into the first beam 100 and the two first base plates 310 through the slotted portion 220. At the same time, the distance between the inner wall of the slotted portion 220 in the second direction Y and the first base plate portion 310 can be relatively small, which can balance the smoothness of insertion and the stability of the structure after insertion.

[0063] In another embodiment, as shown in Figure 8, the slotted portion 220 can be designed as a stepped slot, including a first slot segment 221 and a second slot segment 222. The second slot segment 222 is closer to the opening of the slotted portion 220 than the first slot segment 221. The dimension D5 of the second slot segment 222 in the second direction Y can be larger than the dimension D4 of the first slot segment 221 in the second direction Y.

[0064] The dimension D1 of the first beam 100 in the second direction Y can be matched with the dimension D4 of the first groove segment 221 in the second direction Y, that is, D1 and D4 can be approximately equal. In this way, the first beam 100 can be inserted into the first groove segment 221, and the distance between the inner wall of the first groove segment 221 in the second direction Y and the first beam 100 can be relatively small, which can balance the smoothness of insertion and the stability of the structure after insertion. At the same time, because the distance between the inner wall of the first groove segment 221 in the second direction Y and the first beam 100 is relatively small, welding can be performed between the inner wall of the groove and the first beam 100, increasing the weld length and further ensuring the reliability of the connection between the first beam 100 and the second beam 200.

[0065] The sum of the dimensions of the second beam 200 and the two first base plates 310 in the second direction Y can be matched with the dimension D5 of the second groove segment 222 in the second direction Y, that is, D5 and (D3+2D2) can be approximately equal. In this way, the first beam 100 and the two first base plates 310 can be inserted into the second groove segment 222, and the distance between the inner wall of the second groove segment 222 in the second direction Y and the first base plates 310 can be relatively small, which can take into account both the smoothness of insertion and the stability of the structure after insertion.

[0066] In some alternative implementations, the first side plate portion 320 may also be located inside the second beam 200, i.e., within the cavity of the second beam 200. In this way, the projection of the second beam 200 along the second direction Y can fully cover the first connecting component 300. The first connecting component 300 can be integrally located within the second beam 200, which can significantly reduce the space occupied by the first connecting component 300 within the battery case 1000. Furthermore, it can largely prevent short circuits caused by damage to the external insulation of the battery 2000 due to contact between the first connecting component 300 and multiple batteries 2000, thus ensuring the safety of the battery case 1000 during use.

[0067] As shown in Figures 10 and 11, the second beam 200 may include two second beam plates 210 arranged opposite each other along the third direction Z. One of the two second beam plates 210 may be provided with a clearance notch 211, which can communicate with the slotted portion 220. When the second beam 200 is inserted into the first beam 100 through the slotted portion 220, the clearance notch 211 can avoid the first side plate portion 320 of the first connecting member 300, ensuring smooth insertion.

[0068] The first connecting component 300 has a dimension L1 in the second direction Y. The clearance notch 211 has a dimension L2 in the second direction Y. The second beam 200 has a dimension L3 in the second direction Y. L1, L2, and L3 can satisfy the following relationship: 0.3 × L3 ≥ L2 ≥ L1. In this way, it can ensure reliable clearance of the clearance notch 211 for the first connecting component 300, and also avoid the clearance notch 211 being too large, thereby reducing the impact on the strength of the second beam 200 caused by the opening of the clearance notch 211.

[0069] In some alternative implementations, the ratio of the dimension H1 of the first connecting member 300 in the third direction Z to the dimension H2 of the first beam 100 in the third direction Z can be between 0.6 and 1, and the projection of the first beam 100 along the second direction Y can cover the first connecting member 300.

[0070] This design avoids the first connecting component 300 protruding beyond the first beam 100 along the third direction Z, thus preventing the second beam 200 from being suspended in midway when inserted into the first beam 100. This avoids the problem of the bottom connecting portion 230 failing to abut against the first beam 100 along the third direction Z, ensuring a reliable connection between the first beam 100 and the second beam 200. Simultaneously, it avoids the problem of the first connecting component 300 having an excessively small dimension H1 in the third direction Z, which could reduce the reliability of the connection between the first connecting component 300 and the first beam 100 and the second beam 200.

[0071] In some alternative implementations, the second direction Y can be the front-to-back direction of the vehicle, specifically the direction from the front to the rear of the vehicle, which is also the direction of travel of the vehicle.

[0072] Generally, the battery box 1000 is installed in the middle and rear section of the vehicle in the second direction Y. The front of the vehicle and other parts can act as energy-absorbing components. Thus, when the vehicle collides in the second direction Y, the force on the battery box 1000 in the second direction Y is not large, that is, the force on the second beam 200 is not large. However, when the side of the vehicle is impacted, the impact force will be directly transmitted to the battery box 1000. To address this, in this embodiment of the invention, the thickness of the first beam 100 can be set to be greater than the thickness of the second beam 200 to enhance the structural strength of the first beam 100. Furthermore, the aforementioned slot 220 and avoidance notch 211, which may affect the strength, are not provided in the first beam 100, so that the first beam 100 can be basically a complete unit, thereby enhancing the side impact resistance of the battery box 1000.

[0073] Based on the directional definition in this implementation, the first beam 100 can also be called a crossbeam, and the second beam 200 can also be called a longitudinal beam.

[0074] In some alternative implementations, the partition beam assembly 1300 provided by the present invention may further include a second connecting member 400. The second connecting member 400 may be connected to the groove bottom connecting portion 230 along a third direction Z, and the second connecting member 400 may also be connected to the first beam 100 to further improve the connection reliability of the first beam 100 and the second beam 200.

[0075] As shown in Figure 9, the second connecting component 400 can be roughly shaped like a "U", including a connected second base plate portion 410, two second side plate portions 420, and two wing plate portions 430. Referring to Figure 7, the second beam 200 can include a first surface 200A and two second surfaces 200B, with the two second surfaces 200B located on either side of the first surface 200A in a first direction X. The first surface 200A and the second surface 200B can be arranged at a third angle, specifically between 60° and 120°, for example, 90°. The larger surface (the side with the larger area) of the second base plate portion 410 can be parallel to the first surface 200A, and the larger surface (the side with the larger area) of the second side plate portion 420 can be parallel to the second surface 200B. The second bottom plate portion 410 can be attached to and fixedly connected to the first surface 200A. Specifically, it can be connected to the bottom connection portion 230 along the third direction Z. In this case, the two second side plate portions 420 can be spaced apart along the first direction X, and the two second side plate portions 420 can be connected to the second surface 200B of the bottom connection portion 230 respectively, so as to improve the connection reliability of the second connecting component 400 and the second beam 200. The two wing plate portions 430 can be connected to the two second side plate portions 420 respectively, and the two wing plate portions 430 can be located on the side of the corresponding second side plate portion 420 away from the second bottom plate portion 410. The two wing plate portions 430 can be connected to the first beam 100 along the third direction Z. In this way, the second connecting component 400 can be connected to both the first beam 100 and the second beam 200 at the same time.

[0076] Referring to the orientation and positional relationship in practical applications, the second connecting component 400 is located on the upper side of the first beam 100 and does not occupy the internal space of the sub-accommodation compartment 1400. Therefore, it is less likely to interfere with the battery 2000 and cause battery safety failure. Furthermore, since the first connecting component 300 connects to the second beam 200 in the second direction Y, the portion of the second beam 200 located on the upper side of the first beam 100, i.e., the aforementioned bottom connection portion 230, will be subject to a greater risk of deformation. This risk of deformation is particularly significant when the second beam 200 is a hollow beam. In this case, by setting the aforementioned second connecting component 400 to cover the bottom connection portion 230 and connect it to the first beam 100, the connection area can be increased, and the risk of deformation failure at the bottom connection portion 230 can be largely overcome, thereby greatly improving the connection reliability of the first beam 100 and the second beam 200. Meanwhile, the second connecting component 400 also helps to ensure the relative position of the first beam 100 and the second beam 200 in the third direction Z, and can adapt to the dimensional differences of the first beam 100 and the second beam 200 in the third direction Z.

[0077] Furthermore, the second connecting component 400 also serves a reinforcing function, reducing the likelihood of connection failure between the first beam 100 and the second beam 200 due to deformation or failure of the first connecting component 300. Simultaneously, the second connecting component 400 and the first connecting component 300 can achieve connection and fixation of the first beam 100 and the second beam 200 in three directions, thus better securing the connection between them.

[0078] The connection method between the second connecting component 400, the first beam 100, and the second beam 200 can be the same as that of the first connecting component 300 mentioned above, and will not be repeated here.

[0079] In a specific example, referring to Figure 9, the second base plate portion 410 may be provided with a second base plate connecting hole 411, the second side plate portion 420 may be provided with a second side plate connecting hole 421, and the wing plate portion 430 may be provided with a wing plate connecting hole 431. Bolts, rivets, or other connecting components can pass through the second base plate connecting hole 411 to connect the second base plate portion 410 and the second beam 200. Both the second side plate connecting hole 421 and the wing plate connecting hole 431 can be filled with solder to weld and fix the second side plate portion 420 and the second beam 200, as well as to weld and fix the wing plate portion 430 and the first beam 100.

[0080] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A battery case characterized by comprising: The device includes a base plate, a frame, and a partition beam assembly. The frame surrounds the base plate and is fixedly connected to it. The base plate and the frame together form a storage compartment for holding multiple batteries. The partition beam assembly includes a first beam, a second beam, and a first connecting component. The first beam extends along a first direction, and the second beam extends along a second direction. The first and second directions form a first angle between 85° and 95°. Both the first and second directions are parallel to the large surface of the base plate. The first and second beams divide the storage compartment into multiple sub-storage compartments. The first connecting component includes a first base plate portion and two first side plate portions connected together. The first base plate portion is fixedly connected to the first beam along the second direction. The two first side plate portions are spaced apart along the first direction, and both first side plate portions are connected to the second beam along the first direction. The projection of the second beam along the second direction covers the first base plate portion.

2. The battery case according to claim 1, wherein The first side plate is located inside the cavity of the second beam.

3. The battery pack of claim 2, wherein, The second beam includes two second beam plates arranged opposite each other along a third direction. The third direction, the first direction, and the second direction are all arranged at a second included angle, which is between 85° and 95°. One of the two second beam plates is provided with an avoidance notch. The dimension of the first connecting component in the second direction is L1, the dimension of the clearance notch in the second direction is L2, the dimension of the second beam in the second direction is L3, and 0.3×L3≥L2≥L1.

4. The battery pack of claim 1, wherein, The first side plate is located on the outside of the second beam, and the thickness of the first side plate is between 0.5 mm and 3 mm.

5. The battery pack of claim 4, wherein, The first side plate portion has an insulating layer on at least one side facing away from the second beam along the first direction.

6. The battery pack of claim 4, wherein, The second direction is the front-to-back direction of the vehicle, and the thickness of the first beam is greater than the thickness of the second beam; The second beam is provided with a slotted portion extending along a third direction, and the third direction is set at an angle to both the first direction and the second direction. The first beam is inserted into the slotted portion along the third direction.

7. The battery pack of any one of claims 1-6, wherein, It also includes a second connecting component, which comprises a second base plate, two second side plates, and two wing plates. The second base plate is connected to the two second side plates and the two wing plates respectively. The second base plate is disposed on the upper part of the second beam and fixedly connected to the second beam. The large surface of the second base plate is parallel to the first surface of the second beam. The second side plates are parallel to the second surface of the second beam. The first surface and the second surface are arranged at a third angle, which is between 60° and 120°. The two wing plates are disposed on the upper part of the first beam and fixedly connected to the first beam. The wing plates are parallel to the first surface. The second beam has a larger dimension along a third direction than the first beam. The third direction and the first direction and the second direction are all arranged at a second angle, which is between 85° and 95°.

8. The battery pack of claim 6, wherein, The projection of the slotted portion along the first direction is rectangular, and the sum of the dimensions of the first beam and the two first base plates in the second direction is adapted to the dimension of the slotted portion in the second direction.

9. The battery pack of claim 6, wherein, The slotted portion includes a first slot segment and a second slot segment, the second slot segment being closer to the slot opening of the slotted portion relative to the first slot segment, and the dimension of the second slot segment in the second direction being larger than the dimension of the first slot segment in the second direction; The dimensions of the first beam in the second direction are adapted to the dimensions of the first groove segment in the second direction, and the sum of the dimensions of the second beam and the two first bottom plate portions in the second direction is adapted to the dimensions of the second groove segment in the second direction.

10. The battery pack of any one of claims 1-6, 8, 9, wherein, At least one of the first beam and the second beam is connected to the first connecting component by a combination of welding and connectors.

11. The battery pack of any one of claims 1-6, 8, 9, wherein, The ratio of the dimension of the first connecting component in the third direction to the dimension of the first beam in the third direction is between 0.6 and 1. The third direction is set at an angle to the first direction and the second direction, and the projection of the first beam along the second direction covers the first connecting component.

12. The battery pack of any one of claims 1-11, wherein, A reinforcing section is also provided between the first base plate and the first side plate.

13. The battery pack of claim 12, wherein, The reinforcing part is an inwardly protruding protrusion formed between the first base plate part and the first side plate part. Preferably, the protrusion is formed by stamping a local position at the connection between the first base plate part and the first side plate part.

14. The battery pack of any one of claims 12-13, wherein, Two or more of the reinforcing portions are disposed between the first side plate portion and the first bottom plate portion.

15. A battery pack, characterized by It includes a battery housing and a plurality of batteries disposed inside the battery housing, wherein the battery housing is the battery housing described in any one of claims 1-14.

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