Battery housing and battery pack

Abstract

Provided in the present application are a battery housing and a battery pack. The battery housing comprises a bottom plate and a side beam arranged at the edge of the bottom plate, and further comprises a reinforcing beam, wherein the reinforcing beam is connected to the inner side of the side beam. In a first direction perpendicular to the extension direction of the reinforcing beam and perpendicular to the plane where the bottom plate is located, the reinforcing beam comprises a body portion and a connecting flange, wherein the connecting flange is welded to the side beam, and in the first direction, the ratio of the height of the connecting flange to the height of the reinforcing beam is in the range of 1 / 2 to 1 / 12. The connecting flange is welded to the side beam, and moreover, the contact area between the connecting flange and the side beam is large, such that the welding area is large, and the reinforcing beam can be securely welded to the side beam, thereby preventing the connecting flange and the side beam from detaching from each other. Furthermore, by adjusting the height relationship between the connecting flange and the reinforcing beam, the connection strength between the reinforcing beam and the side beam can be ensured while ensuring that the reinforcing beam has good extrusion strength.

Description

Battery housing and battery pack

[0001] This application claims priority to Chinese Patent Application No. 202411588367.X, filed on November 8, 2024, entitled "Battery Box and Battery Pack", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of new energy battery technology, specifically to a battery housing and battery pack. Background Technology

[0003] The battery pack is a key component of new energy vehicles. It consists of a battery pack housing and the battery cells housed within it. The battery pack housing includes a base plate and side beams along its edge. To reduce costs and facilitate manufacturing, some battery packs use roll-formed or stamped side beams. However, roll-formed or stamped side beams have lower strength than aluminum profiles, causing the overall strength of the battery pack to fail to meet impact and compression requirements.

[0004] To address this issue, some battery packs incorporate reinforcing beams on the inner side of the rolled or stamped edge beams. These reinforcing beams are welded to the edge beams to enhance the overall strength of the battery pack. However, since there is only a single linear weld between the reinforcing beam and the edge beam, the reinforcing beam is prone to detaching from the edge beam after a period of use, leading to a weakening of the battery pack's overall strength. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to overcome the defect that the reinforcing beam in the battery pack is easy to fall off the side beam in the prior art, thereby providing a battery box and battery pack.

[0006] To address the aforementioned issues, this application provides a battery housing, including a base plate and a side beam disposed along the edge of the base plate. The base plate and the side beam enclose a receiving space for accommodating a battery. The housing also includes a reinforcing beam connected to the inner side of the side beam facing the receiving space, with the reinforcing beam extending in the same direction as the side beam. In a first direction perpendicular to the extension direction of the reinforcing beam and perpendicular to the plane of the base plate, the reinforcing beam includes a body portion and a connecting flange, which is welded to the side beam. Furthermore, along the first direction, the ratio of the height of the connecting flange perpendicular to the base plate to the height of the reinforcing beam perpendicular to the base plate is within the range of 1 / 2 to 1 / 12.

[0007] This application has the following advantages:

[0008] The reinforcing beam, utilizing the technical solution of this application, includes a body and a connecting flange. The body reinforces the structure of the side beam, thereby ensuring the battery pack meets impact and compression requirements. The connecting flange is welded to the side beam, and the large contact area and welding area between the connecting flange and the side beam allow the reinforcing beam to be firmly welded to the side beam, preventing detachment. Furthermore, by adjusting the height relationship between the connecting flange and the reinforcing beam, the connection strength between the reinforcing beam and the side beam can be guaranteed while ensuring good compressive strength. Therefore, the technical solution of this application solves the defect in the prior art where the reinforcing beam in the battery pack easily detaches from the side beam. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0010] Figure 1 shows a schematic diagram of the battery pack of this application from a bottom view;

[0011] Figure 2 shows a schematic diagram of the internal structure of the battery pack in Figure 1;

[0012] Figure 3 shows a schematic diagram of the reinforcing beam in Figure 2;

[0013] Figure 4 shows a schematic diagram of the structure of the reinforcing beam and the edge beam in Figure 2.

[0014] Explanation of reference numerals in the attached drawings: 10, base plate; 20, side beam; 21, front beam; 30, reinforcing beam; 31, main body; 311, buffer cavity; 312, first section; 313, second section; 32, connecting flange; 40, electrical compartment. Detailed Implementation

[0015] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. 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.

[0016] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0018] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0019] As shown in Figures 1 to 4, an embodiment of the battery housing according to this application includes a base plate 10, a side beam 20 disposed along the edge of the base plate 10, and a reinforcing beam 30. The base plate 10 and the side beam 20 enclose a receiving space for accommodating the battery (and electrical components). The reinforcing beam 30 is connected to the inner side of the side beam 20 facing the receiving space, and the extending direction of the reinforcing beam 30 is the same as the extending direction of the side beam 20. Along a first direction L1 perpendicular to the extending direction of the reinforcing beam 30 and perpendicular to the plane of the base plate 10, the reinforcing beam 30 includes a body portion 31 and a connecting flange 32, which is welded to the side beam 20. Furthermore, along the first direction L1, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 is in the range of 1 / 2 to 1 / 12. The heights d1 and d2 of both the connecting flange 32 and the reinforcing beam 30 refer to their heights in the direction perpendicular to the plane of the base plate 10.

[0020] Using the technical solution of this embodiment, the reinforcing beam 30 includes a body portion 31 and a connecting flange 32. The body portion 31 is used to strengthen the structure of the side beam 20, thereby enabling the battery pack to meet the impact and compression requirements. The connecting flange 32 is welded to the side beam 20, and the contact area and welding area between the connecting flange 32 and the side beam 20 are large, which enables the reinforcing beam 30 to be firmly welded to the side beam 20, preventing them from detaching. Furthermore, by adjusting the height relationship between the connecting flange 32 and the reinforcing beam 30, the connection strength between the reinforcing beam 30 and the side beam 20 can be guaranteed while ensuring that the reinforcing beam 30 has good compressive strength. Therefore, the technical solution of this embodiment solves the defect in the prior art where the reinforcing beam in the battery pack is prone to detaching from the side beam.

[0021] As shown in Figures 1 and 2, in the battery box, the side beam 20 is located at the edge of the base plate 10, and the side beam 20 forms the frame structure of the battery box. The base plate 10 and the side beam 20 enclose a receiving space, which is used to place the battery pack, electrical components, etc.

[0022] Furthermore, in order to strengthen the side beam 20 and make the battery box meet the impact crush strength requirements, this embodiment also provides a reinforcing beam 30 inside the battery box. The reinforcing beam 30 is located on the inner side of the side beam 20 and is welded to the side beam 20.

[0023] It should be noted that, for ease of describing the positional relationships between the components, this embodiment specifies a first direction L1 and a second direction L2. The first direction L1 is the vertical direction shown in Figure 4, perpendicular to the extension direction of the reinforcing beam 30 and also perpendicular to the plane of the base plate 10. The second direction L2 is the horizontal direction shown in Figure 4, perpendicular to the extension direction of the reinforcing beam 30 and also parallel to the plane of the base plate 10.

[0024] Of course, those skilled in the art can adjust the placement of the battery box in this example according to actual needs. The content shown in Figure 4 should not be construed as a limitation on the placement of the battery box.

[0025] Referring to Figures 3 and 4, in this embodiment, the reinforcing beam 30 along the first direction L1 includes a body portion 31 and a connecting flange 32. The body portion 31 is located at the corner between the side beam 20 and the base plate 10. The connecting flange 32 is located on the side of the body portion 31 facing away from the base plate 10, and is positioned close to the side beam 20, allowing the connecting flange 32 to fit against the inner surface of the side beam 20, thereby enabling the connecting flange 32 to be welded to the side beam 20.

[0026] Furthermore, the main body 31 is used to reinforce the strength of the side beam 20. When the battery box is subjected to external pressure, the main body 31 shares the external pressure, thereby improving the overall strength of the battery pack.

[0027] Furthermore, the connecting flange 32 is used for welding onto the side beam 20, thereby fixing the reinforcing beam 30 onto the side beam 20.

[0028] As shown in Figure 4, the connecting flange 32 and the edge beam 20 are in surface contact, thus increasing the welding area between the reinforcing beam 30 and the edge beam 20. Furthermore, multiple straight welds or multiple arrays of spot welds can be performed between the connecting flange 32 and the edge beam 20, thereby greatly improving the weld connection strength between the connecting flange 32 and the edge beam 20, making it less likely for the reinforcing beam 30 to detach from the edge beam 20.

[0029] As shown in Figure 4, along the first direction L1, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 is in the range of 1 / 2 to 1 / 12.

[0030] The height d1 of the connecting flange 32 is the vertical dimension of the connecting flange 32 in Figure 4, and the height d1 of the reinforcing beam 30 is the vertical dimension of the reinforcing beam 30 as a whole (including the body 31 and the connecting flange 32) in Figure 4.

[0031] Furthermore, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 must be neither too small nor too large. If the ratio is small, it means that the height d1 of the connecting flange 32 is smaller than the height d2 of the reinforcing beam 30, thus reducing the contact area between the connecting flange 32 and the side beam 20, resulting in a smaller welding area and failing to guarantee the connection strength between them. If the ratio is large, it means that the height d1 of the connecting flange 32 is larger than the height d2 of the reinforcing beam 30, which reduces the corresponding size of the body part 31, failing to guarantee the compressive strength of the battery box, and weakening the reinforcing effect of the reinforcing beam 30.

[0032] Therefore, optionally, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 is in the range of 1 / 2 to 1 / 12.

[0033] For example, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 can be selected as 1 / 2, 1 / 4, 1 / 6, 1 / 8, 1 / 10 or 1 / 12.

[0034] Optionally, the side beam 20 is formed by roll forming, and the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 is in the range of 1 / 3 to 1 / 10.

[0035] Specifically, when the edge beam 20 is formed by roll forming, the strength of the edge beam 20 is relatively weaker than that of edge beams formed by other processes. Therefore, there is a stronger need for reinforcement of the reinforcing beam 30, or in other words, the strength requirement for the reinforcing beam 30 is higher.

[0036] Therefore, when the side beam 20 is formed by roll forming, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 needs to be adjusted. On the premise of ensuring the welding strength between the connecting flange 32 and the side beam 20, it is also necessary to further ensure that the body part 31 has higher strength.

[0037] Therefore, optionally, when the side beam 20 is formed by roll forming, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 is in the range of 1 / 3 to 1 / 10.

[0038] For example, when the side beam 20 is formed by roll forming, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 can be selected as 1 / 3, 1 / 4, 1 / 5, 1 / 6, 1 / 7, 1 / 8, 1 / 9 or 1 / 10.

[0039] As shown in Figures 2 and 4, optionally, the battery box includes an electrical compartment 40, and a reinforcing beam 30 is disposed inside the electrical compartment 40. The ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 is in the range of 1 / 4 to 1 / 6.

[0040] Specifically, the battery box includes a battery compartment and an electrical compartment 40. The battery compartment is used to house the battery pack, and the electrical compartment 40 is used to house electrical components. Busbars, bridging copper busbars, and other connectors for the battery pack are connected to the electrical components in the electrical compartment 40.

[0041] Furthermore, when the battery box is subjected to external pressure, the electrical compartment 40 deforms under pressure, compressing the electrical components. This can easily lead to fires or even explosions of the electrical components. Moreover, the structural strength of the circuit board and electrical components is significantly lower than that of the battery pack. Therefore, a reinforcing beam 30 needs to be installed inside the side beam 20 within the electrical compartment 40. The electrical compartment 40 also has a stronger reinforcement requirement for the reinforcing beam 30; in other words, the strength requirement for the reinforcing beam 30 located within the electrical compartment 40 is higher.

[0042] Therefore, when the side beam 20 is installed inside the electrical compartment 40, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 needs to be further adjusted. On the premise of ensuring the welding strength between the connecting flange 32 and the side beam 20, it is also necessary to ensure that the body part 31 has a higher strength.

[0043] Therefore, optionally, when the side beam 20 is set inside the electrical compartment 40, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 is in the range of 1 / 4 to 1 / 6.

[0044] For example, when the side beam 20 is set inside the electrical compartment 40, the ratio of the height d1 of the connecting flange 32 to the height d2 of the reinforcing beam 30 can be selected as 1 / 4, 1 / 5 or 1 / 6.

[0045] As shown in Figure 4, optionally, the height d1 of the connecting flange 32 along the first direction L1 is in the range of 6mm to 20mm.

[0046] This configuration ensures a large welding area between the connecting flange 32 and the side beam 20, thereby guaranteeing the connection strength between the connecting flange 32 and the side beam 20.

[0047] For example, the height d1 of the connecting flange 32 can be selected as 6mm, 8mm, 10mm, 12mm, 15mm or 20mm, etc.

[0048] As shown in Figure 4, in the technical solution of this embodiment, the main body 31 includes a buffer cavity 311. The ratio of the thickness d3 of the profile of the main body 31 to the width d4 of the main body 31 in the second direction L2, which is perpendicular to the extension direction of the reinforcing beam 30 and parallel to the bottom plate 10, is in the range of 1 / 12 to 1 / 20.

[0049] Specifically, the buffer cavity 311 is used to buffer the impact force or pressure on the battery box in the second direction L2.

[0050] As can be seen from Figure 4, the width d4 of the body part 31 is the dimension of the body part 31 along the horizontal direction.

[0051] Furthermore, the ratio of the thickness d3 of the profile of the body part 31 to the width d4 of the body part 31 must be neither too small nor too large. If the ratio is small, it indicates that the thickness d3 of the profile of the body part 31 is relatively small compared to the width d4, which cannot guarantee the structural strength of the body part 31 and weakens the reinforcing effect of the reinforcing beam 30. If the ratio is large, it indicates that the thickness d3 of the profile of the body part 31 is relatively large compared to the width d4, and an excessively thick body part 31 will encroach on the space of the buffer cavity 311, resulting in a poorer buffering effect and reduced space utilization efficiency within the battery box. At the same time, an excessively thick body part 31 is also difficult to manufacture.

[0052] Therefore, the ratio of the thickness d3 of the profile of the main body 31 to the width d4 of the main body 31 should be reasonably selected to achieve a balance between the strength of the main body 31, the buffering effect of the buffer cavity 311, and the space utilization efficiency inside the battery box.

[0053] Optionally, the ratio of the thickness d3 of the profile of the body portion 31 to the width d4 of the body portion 31 is in the range of 1 / 12 to 1 / 20.

[0054] For example, the ratio of the thickness d3 of the profile of the body part 31 to the width d4 of the body part 31 can be selected as 1 / 12, 1 / 14, 1 / 16, 1 / 18 or 1 / 20.

[0055] It should be noted that the reinforcing beam 30 in this embodiment is not limited to being installed inside the electrical compartment 40. The reinforcing beam 30 can also be installed in other locations inside the battery box, including inside the battery compartment, etc.

[0056] Furthermore, the buffer cavity 311 is a closed cavity surrounded by profiles. For example, the reinforcing beam 30 can be formed by roll forming and form a closed cavity.

[0057] As shown in Figures 3 and 4, in this embodiment, the first segment 312 and the second segment 313 of the body part 31 are connected at an angle, and the inner space of the first segment 312 and the second segment 313 forms a buffer cavity 311.

[0058] Specifically, the first segment 312 is perpendicular to the inner side of the base plate 10, and the second segment 313 is parallel to the inner side of the base plate 10, forming an approximate "L" shape. The first segment 312 and the second segment 313 are perpendicular to each other. The connecting flange 32 is connected to one end of the first segment 312 facing the side beam 20, and the connecting flange 32 is perpendicular to the first segment 312.

[0059] Furthermore, the bottom of the second segment 313 is provided with a bottom edge that folds towards the side beam 20, the bottom edge being used to mate with and be positioned against the base plate 10. The end of the bottom edge has a flange that bends away from the base plate 10, the flange being used to mate with and be positioned against the bottom of the inner side of the side beam 20.

[0060] In this embodiment, the inner space of the first segment 312 and the second segment 313 forms a buffer cavity 311. More specifically, the buffer cavity 311 is formed between the first segment 312, the second segment 313, the bottom edge, and the side beam 20.

[0061] As shown in Figure 2, in the technical solution of this embodiment, the side beam 20 includes a front beam 21 facing the front of the vehicle, and one end of the reinforcing beam 30 facing the front beam 21 is welded to the front beam 21, thereby further strengthening the connection strength between the reinforcing beam 30 and the battery box.

[0062] Specifically, along the longitudinal direction of the vehicle, both ends of the first segment 312 and the second segment 313 are provided with flanges. As shown in Figure 3, on the rearward side of the vehicle, the flanges of the first segment 312 and the second segment 313 are used for welding to the partition beam (used to separate the battery compartment and the electrical compartment 40), and on the frontward side of the vehicle, the flanges of the first segment 312 and the second segment 313 (not shown in the figure) are used for welding to the front beam 21. In this way, both the front and rear ends of the reinforcing beam 30 in the electrical compartment 40 can be fixed, thereby strengthening the connection between the reinforcing beam 30 and the battery box.

[0063] As shown in Figure 4, in the technical solution of this embodiment, the ratio of the profile thickness d5 of the reinforcing beam 30 to the profile thickness d6 of the side beam 20 is in the range of 1 to 1.7.

[0064] Specifically, since the reinforcing beam 30 is formed by bending a sheet of material, the profile thickness d5 of the reinforcing beam 30 here is equal to the profile thickness d3 of the main body 31 mentioned above.

[0065] Furthermore, since the reinforcing beam 30 serves as a structural reinforcement, the profile thickness d5 of the reinforcing beam 30 should not be less than the profile thickness d6 of the edge beam 20. That is, the ratio of the profile thickness d5 of the reinforcing beam 30 to the profile thickness d6 of the edge beam 20 should be at least greater than 1.

[0066] Furthermore, the ratio of the profile thickness d5 of the reinforcing beam 30 to the profile thickness d6 of the edge beam 20 must be neither too small nor too large. If the ratio is small, it indicates that the profile thickness d5 of the reinforcing beam 30 is relatively small compared to the profile thickness d6 of the edge beam 20, which cannot guarantee the structural strength of the reinforcing beam 30 and achieve its expected support strength. If the ratio is large, it indicates that the profile thickness d5 of the reinforcing beam 30 is relatively large compared to the profile thickness d6 of the edge beam 20. An excessively thick reinforcing beam 30 will increase the overall weight of the battery box and encroach on the space inside the battery box.

[0067] Therefore, the ratio of the profile thickness d5 of the reinforcing beam 30 to the profile thickness d6 of the side beam 20 should be reasonably selected to achieve a balance between the strength of the reinforcing beam 30 and the space utilization efficiency and weight within the battery box.

[0068] Therefore, optionally, the ratio of the profile thickness d5 of the reinforcing beam 30 to the profile thickness d6 of the edge beam 20 is in the range of 1 to 1.7.

[0069] For example, the ratio of the profile thickness d5 of the reinforcing beam 30 to the profile thickness d6 of the edge beam 20 can be selected as 1, 1.2, 1.4, 1.6 or 1.7.

[0070] As shown in Figure 4, in the technical solution of this embodiment, the ratio of the height d2 of the reinforcing beam 30 to the height d7 of the side beam 20 along the first direction L1 is in the range of 0.5 to 0.8.

[0071] As shown in Figure 4, the height d2 of the reinforcing beam 30 is the dimension of the reinforcing beam 30 (including the main body 31 and the connecting flange 32) along the vertical direction. The height d7 of the side beam 20 is also the dimension of the side beam 20 along the vertical direction.

[0072] Furthermore, the ratio of the height d2 of the reinforcing beam 30 to the height d7 of the side beam 20 must be neither too small nor too large. If the ratio is small, it indicates that the height d2 of the reinforcing beam 30 is relatively small compared to the height d7 of the side beam 20, which cannot guarantee the structural strength of the reinforcing beam 30 and achieve its expected support strength. If the ratio is large, it indicates that the height d2 of the reinforcing beam 30 is relatively large compared to the height d7 of the side beam 20, and a taller reinforcing beam 30 will increase the overall weight of the battery box and encroach on the space inside the battery box.

[0073] Therefore, optionally, the ratio of the height d2 of the reinforcing beam 30 to the height d7 of the edge beam 20 is in the range of 0.5 to 0.8.

[0074] For example, the ratio of the height d2 of the reinforcing beam 30 to the height d7 of the edge beam 20 can be selected as 0.5, 0.6, 0.7 or 0.8.

[0075] This application also provides a battery pack, an embodiment of which includes a battery housing and a battery pack disposed within the battery housing, wherein the battery housing is the aforementioned battery housing.

[0076] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A battery housing, characterized in that, The device includes a base plate (10) and a side beam (20) disposed along the edge of the base plate (10). The base plate (10) and the side beam (20) enclose a receiving space for accommodating a battery. It also includes a reinforcing beam (30) connected to the side beam (20) on its inner side facing the receiving space. The reinforcing beam (30) extends in the same direction as the side beam (20), and extends perpendicular to the direction of extension of the reinforcing beam (30) and perpendicular to the base plate. In the first direction (L1) of the plane where (10) is located, the reinforcing beam (30) includes a body part (31) and a connecting flange (32), the connecting flange (32) is welded to the side beam (20), and along the first direction (L1), the ratio of the height (d1) of the connecting flange (32) perpendicular to the direction of the base plate (10) to the height (d2) of the reinforcing beam (30) perpendicular to the direction of the base plate (10) is in the range of 1 / 2 to 1 / 12.

2. The battery housing according to claim 1, characterized in that, The side beam (20) is formed by roll forming, and the ratio of the height (d1) of the connecting flange (32) to the height (d2) of the reinforcing beam (30) is in the range of 1 / 3 to 1 / 10.

3. The battery housing according to claim 1, characterized in that, The battery box includes an electrical compartment (40), and the reinforcing beam (30) is disposed in the electrical compartment (40). The ratio of the height (d1) of the connecting flange (32) to the height (d2) of the reinforcing beam (30) is in the range of 1 / 4 to 1 / 6.

4. The battery housing according to claim 1, characterized in that, Along the first direction (L1), the height (d1) of the connecting flange (32) is in the range of 6 mm to 20 mm.

5. The battery housing according to claim 1, characterized in that, The body part (31) includes a buffer cavity (311), and the ratio of the thickness (d3) of the profile of the body part (31) to the width (d4) of the body part (31) in a second direction (L2) perpendicular to the extension direction of the reinforcing beam (30) and parallel to the base plate (10) is in the range of 1 / 12 to 1 / 20.

6. The battery housing according to claim 5, characterized in that, The buffer cavity (311) is a closed cavity formed by a profile, or the main body (31) includes a first section (312) and a second section (313) connected at an angle, and the inner space of the first section (312) and the second section (313) forms the buffer cavity (311).

7. The battery housing according to claim 1, characterized in that, The side beam (20) includes a front beam (21) facing the front of the vehicle, and one end of the reinforcing beam (30) facing the front beam (21) is welded to the front beam (21).

8. The battery housing according to claim 1, characterized in that, The ratio of the profile thickness (d5) of the reinforcing beam (30) to the profile thickness (d6) of the side beam (20) is in the range of 1 to 1.

7.

9. The battery housing according to claim 1, characterized in that... Along the first direction (L1), the ratio of the height (d2) of the reinforcing beam (30) to the height (d7) of the side beam (20) is in the range of 0.5 to 0.

8.

10. A battery pack, characterized in that, It includes a battery housing and a battery pack disposed within the battery housing, wherein the battery housing is the battery housing according to any one of claims 1 to 9.

Images