Battery box and battery pack

Abstract

The application provides a battery box and a battery pack. The battery box comprises a box body, a side beam and a reinforcing beam. The box body comprises a bottom plate and a plurality of side plates connected with the bottom plate. The bottom plate and the plurality of side plates enclose an installation cavity. The side beam is arranged in the installation cavity. The side beam is connected with the bottom plate and the side plate on one side of the box body along a first direction, and encloses an accommodating cavity extending along a second direction. The side plate on one side of the box body along the first direction extends along the second direction. The reinforcing beam is arranged in the accommodating cavity and extends along the second direction. The reinforcing beam is connected with the bottom plate and the side plate on one side of the box body along the first direction, and encloses a first cavity extending along the second direction. By arranging the reinforcing beam extending along the second direction in the accommodating cavity, the reinforcing beam is connected with the bottom plate and the side plate on one side of the box body along the first direction, and encloses the first cavity extending along the second direction. The side plate on one side of the box body along the first direction can be supported, and the extrusion resistance of the side plate on one side of the box body along the first direction is higher.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery box and battery pack. Background Technology

[0002] In related technologies, the battery box body is generally formed by stamping thin plates, which has weak strength and cannot meet the strength requirements of the battery box, especially the insufficient compressive strength, which can easily affect the safety performance of the battery pack. Utility Model Content

[0003] The embodiments of this application provide a battery box and battery pack, which can improve the technical problem of insufficient compressive strength of the battery box.

[0004] In a first aspect, embodiments of this application provide a battery box, comprising:

[0005] The housing includes a bottom plate and a plurality of side plates connected to the bottom plate, the bottom plate and the plurality of side plates forming an installation cavity;

[0006] A side beam is provided in the mounting cavity. The side beam is connected to the bottom plate and the side plate of the box body along one side of the first direction, and encloses a receiving cavity extending along the second direction. The side plate of the box body along the first direction extends along the second direction.

[0007] A reinforcing beam is disposed within the receiving cavity and extends along the second direction. The reinforcing beam is connected to the bottom plate and the side plate of the box body along the first direction, and together they enclose a first cavity extending along the second direction.

[0008] In some embodiments, a second cavity extending along the second direction is formed between the reinforcing beam and the side beam. This creates a buffer space between the reinforcing beam and the side beam, which helps improve the battery box's compressive strength in the first direction.

[0009] In some embodiments, the reinforcing beam has at least one reinforcing portion protruding from the side opposite to the first cavity. The reinforcing portion can increase the strength of the reinforcing beam, thereby further increasing the supporting strength of the reinforcing beam on the side plate, and thus increasing the compressive strength of the side plate.

[0010] In some embodiments, the reinforcing beam includes a first reinforcing plate and a second reinforcing plate connected at an included angle. The first reinforcing plate is connected to the corresponding side plate and is spaced apart from the bottom plate. The second reinforcing plate is connected to the bottom plate and is spaced apart from the corresponding side plate. The first reinforcing plate, the second reinforcing plate, the bottom plate, and the side plate together form the first cavity. Thus, the bending structure formed by the connection of the first and second reinforcing plates can improve the strength of the reinforcing beam, thereby increasing the supporting strength of the reinforcing beam on the side plate.

[0011] In some embodiments, at least a portion of the reinforcing portion is located on the side of the first reinforcing plate opposite to the first cavity, to improve the strength of the first reinforcing plate, thereby improving the overall strength of the reinforcing beam; and / or,

[0012] At least a portion of the reinforcing portion is located on the side of the second reinforcing plate opposite to the first cavity, so as to improve the strength of the second reinforcing plate and thus improve the overall strength of the reinforcing beam.

[0013] In some embodiments, the reinforcing portion extends from the first reinforcing plate to the second reinforcing plate, such that a portion of the reinforcing portion is located at the junction of the first and second reinforcing plates, thereby further improving the strength of the reinforcing beam.

[0014] In some embodiments, the reinforcing beam further includes a first connecting plate connected to the first reinforcing plate. The first connecting plate is disposed opposite to and connected to the corresponding side plate, and at least a portion of the reinforcing portion protrudes from the side of the first connecting plate away from the side plate. This increases the connection area between the reinforcing beam and the corresponding side plate, thereby increasing the connection strength between the reinforcing beam and the corresponding side plate. Simultaneously, by having at least a portion of the reinforcing portion protrude from the side of the first connecting plate away from the side plate, the strength of the first connecting plate is increased, resulting in a higher connection strength between the first connecting plate and the corresponding side plate, and consequently, a higher strength for the reinforcing beam.

[0015] In some embodiments, the first connecting plate includes a plurality of connecting segments sequentially connected along the second direction. Each of the plurality of connecting segments is disposed opposite to a corresponding side plate. One of two adjacent connecting segments is connected to the corresponding side plate, while the other connecting segment is spaced apart from the corresponding side plate. Thus, a bending structure can be formed at the connection point of two adjacent connecting segments, which helps to improve the strength of the first connecting plate, thereby improving the overall strength of the reinforcing beam, and also improving the connection strength between the first connecting plate and the corresponding side plate.

[0016] In some embodiments, there are multiple reinforcing portions; the multiple reinforcing portions are spaced apart along the second direction; a portion of each reinforcing portion protrudes from a different connecting segment. Thus, the strength of the connecting segment can be strengthened by the reinforcing portions, thereby further improving the overall strength of the first connecting plate and the reinforcing beam.

[0017] In some embodiments, the reinforcing portion extends to the edge of the second reinforcing plate near the bottom plate, thereby increasing the length of the reinforcing portion to improve the overall strength of the second reinforcing plate and the reinforcing beam.

[0018] In some embodiments, the surface of the reinforcing part facing away from the first cavity is a convex curved surface, so that the transition of the surface of the reinforcing part facing away from the first cavity is relatively smooth, and at the same time, it has a better reinforcing effect on the reinforcing beam.

[0019] In some embodiments, a portion of the reinforcing beam protrudes in a direction away from the first cavity to form the reinforcing portion, thereby making the processing of the reinforcing beam more convenient, reducing the production cost of the reinforcing beam, and improving the production efficiency of the reinforcing beam.

[0020] In some embodiments, there are two side beams, each corresponding to one of the two side plates on both sides of the housing along the first direction, and each accommodating cavity is provided with a reinforcing beam. Thus, the two side beams and the reinforcing beam can support the side plates on both sides of the housing along the first direction, thereby further improving the compressive strength of the side plates on both sides of the housing along the first direction.

[0021] In some embodiments, the battery box further includes a rear beam located within the mounting cavity, the side plate of the box body along the second direction is connected to the rear beam, and the bottom plate is connected to the rear beam, thereby supporting the bottom plate of the box body and the side plate of the box body along the second direction through the rear beam, thereby improving the compressive strength of the bottom plate of the box body and the side plate of the box body along the second direction.

[0022] The battery box also includes a corner beam located in the mounting cavity. The rear beam is connected to the side beam through the corner beam. The corner beam is connected to the two adjacent side plates and the bottom plate, which enables the rear beam to support the side beam and improve the compressive strength of the part of the side beam near the corner beam in the first direction.

[0023] In some embodiments, the battery box further includes a crossbeam extending along the first direction, the crossbeam being located within the mounting cavity, and both ends of the crossbeam being connected one-to-one with the side plates of the box body along the first direction, thereby supporting the side plates of the box body along the first direction and improving the compressive strength of the side plates of the box body along the first direction; at least one end of the crossbeam is provided with a third connecting plate, the third connecting plate being disposed opposite to and connected to the corresponding side plate. Thus, the third connecting plate and the corresponding side plate have a high connection area, which improves the connection strength between the crossbeam and the corresponding side plate.

[0024] In some embodiments, the ratio of the height of the third connecting plate to the height of the corresponding side plate is greater than or equal to 1 / 2 and less than or equal to 2 / 3, thereby further improving the support strength of the crossbeam to the side plate of at least one side of the box body along the first direction, which is beneficial to improving the compressive strength of the box body in the first direction.

[0025] In some embodiments, the battery box further includes a mounting assembly disposed on one side of the box body along the first direction. The mounting assembly includes a first mounting plate, a second mounting plate, and a third mounting plate stacked along the height direction of the box body. The first mounting plate and the second mounting plate are respectively connected to the corresponding side plates, and the third mounting plate is connected to the side of the bottom plate opposite to the mounting cavity. By including the first mounting plate, the second mounting plate, and the third mounting plate stacked along the height direction of the box body, the rigidity of the mounting assembly can be significantly improved. Simultaneously, by connecting the first and second mounting plates to the corresponding side plates, the connection area between the mounting assembly and the side plates of the box body can be increased, effectively distributing the force between the mounting assembly and the side plates of the box body. Furthermore, by connecting the third mounting plate to the side of the bottom plate opposite to the mounting cavity, the mounting assembly can transfer a portion of the compressive force to the bottom plate of the box body, which is beneficial for improving the compressive strength of the battery box.

[0026] In some embodiments, a portion of the second mount plate protrudes toward the first mount plate or the third mount plate to form a reinforcing protrusion structure. By protruding a portion of the second mount plate to form a reinforcing protrusion structure, the strength of the second mount plate can be increased, thereby increasing the strength of the mount assembly.

[0027] Secondly, embodiments of this application provide a battery pack, comprising:

[0028] A battery box, as described above, includes a box body, side beams, and reinforcing beams. The box body includes a bottom plate and multiple side plates connected to the bottom plate, the bottom plate and the multiple side plates forming a mounting cavity. The side beams are disposed within the mounting cavity and are connected to the bottom plate and the side plates of the box body along one side of a first direction, forming a receiving cavity extending along a second direction. The side plates of the box body along the first direction extend along the second direction. The reinforcing beams are disposed within the receiving cavity and extend along the second direction. The reinforcing beams are connected to the bottom plate and the side plates of the box body along one side of the first direction, forming a first cavity extending along the second direction.

[0029] A battery assembly, comprising multiple batteries, is disposed within the mounting cavity of the battery box.

[0030] The beneficial effects of the embodiments of this application are as follows:

[0031] In the embodiments of this application, by connecting the side beam to the bottom plate of the box and the side plate along the first direction, the side beam, the bottom plate of the box and the side plate along the first direction are arranged to form a receiving cavity extending along the second direction, so that the side beam can support the side plate along the first direction of the box and give the side plate along the first direction of the box strong compressive strength.

[0032] Based on this, by setting a reinforcing beam extending in the second direction in the receiving cavity, the reinforcing beam is connected to the bottom plate and the side plate of the box body along the first direction, and encloses and forms a first cavity extending in the second direction. The reinforcing beam can further support the side plate of the box body along the first direction, so that the side plate of the box body along the first direction has higher compressive strength. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of one embodiment of the battery pack provided in this application;

[0035] Figure 2 This is an exploded structural diagram of one embodiment of the battery pack provided in this application.

[0036] Figure 3 This is an exploded structural diagram of one embodiment of the battery box provided in this application.

[0037] Figure 4 A schematic diagram of a structural embodiment of the reinforcing beam provided in this application;

[0038] Figure 5 This is a schematic diagram of the structure of one embodiment of the battery box provided in this application.

[0039] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0040] Figure 7 This is an exploded structural diagram of one embodiment of the mounting component provided in this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1-Battery pack; 10-Battery box; 11-Box body; 111-Base plate; 112-Side plate; 1110-Mounting cavity; 1111-Electrical compartment; 1112-Battery compartment; 12-Side beam; 121-Receiving cavity; 1211-First cavity; 1212-Second cavity; 13-Reinforcing beam; 131-Reinforcing part; 1311-First reinforcing plate; 1312-Second reinforcing plate; 1313-First connecting plate; 1314 - Connecting section; 1315 - Second connecting plate; 14 - Rear beam; 15 - Corner beam; 16 - Mounting assembly; 161 - First mounting plate; 162 - Second mounting plate; 1621 - Reinforcing protrusion structure; 163 - Third mounting plate; 17 - Crossbeam; 171 - Third connecting plate; 20 - Cover plate; 30 - Battery assembly; 40 - Temperature regulating plate; 50 - Foam; X - First direction; Y - Second direction; Z - Height direction. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0044] This application provides a battery box and a battery pack. These will be described in detail below.

[0045] Figure 1This is a schematic diagram of the structure of one embodiment of the battery pack provided in this application. Figure 2 This is an exploded structural diagram of one embodiment of the battery pack provided in this application. Figure 1 and Figure 2 As shown, the battery pack 1 includes a battery box 10 and a battery assembly 30. The battery assembly 30 includes multiple batteries, which are disposed inside the battery box 10.

[0046] Continue to refer to Figure 1 and Figure 2 The battery box 10 includes a box body 11, which includes a bottom plate 111 and multiple side plates 112. The bottom plate 111 and the multiple side plates 112 enclose a mounting cavity 1110. Multiple batteries of the battery assembly 30 are disposed within the mounting cavity 1110. The battery pack 1 also includes a temperature regulating plate 40 disposed within the mounting cavity 1110. The temperature regulating plate 40 is located between the battery assembly 30 and the bottom plate 111, and the temperature regulating plate 40 is in thermal contact with the multiple batteries of the battery assembly 30 to regulate the temperature of the multiple batteries of the battery assembly 30.

[0047] Specifically, the temperature regulating plate 40 may be provided with a flow channel for the temperature regulating medium to flow through. The temperature regulating medium exchanges heat with the batteries of the battery assembly 30 through the temperature regulating plate 40 to absorb the temperature of the batteries, or to transfer heat to the batteries to cool or heat the multiple batteries of the battery assembly 30.

[0048] Additionally, the battery pack 1 may include expanding foam 50 disposed within the mounting cavity 1110, which encapsulates multiple batteries of the battery assembly 30 to secure them. The battery pack 1 also includes a cover plate 20, which is connected to the battery box 10 and covers the mounting cavity 1110, thus sealing the mounting cavity 1110.

[0049] In some embodiments, such as Figure 2 and Figure 3 As shown, the battery box 10 includes a box body 11 and side beams 12. The box body 11 includes a bottom plate 111 and a plurality of side plates 112 connected to the bottom plate 111. The bottom plate 111 and the plurality of side plates 112 enclose a mounting cavity 1110. The side beams 12 are disposed in the mounting cavity 1110. The side beams 12 are connected to the bottom plate 111 and the side plates 112 of the box body 11 along the first direction X, and enclose a receiving cavity 121 extending along the second direction Y. The side plates 112 of the box body 11 along the first direction X extend along the second direction Y.

[0050] By connecting the side beam 12 to the bottom plate 111 of the box body 11 and the side plate 112 along the first direction X, the side beam 12, the bottom plate 111 of the box body 11 and the side plate 112 along the first direction X form a receiving cavity 121 extending along the second direction Y. This allows the side beam 12 to support the side plate 112 of the box body 11 along the first direction X, giving the side plate 112 of the box body 11 along the first direction X strong compressive strength.

[0051] Continue to refer to Figure 2 and Figure 3 The battery box 10 may also include a reinforcing beam 13, which is disposed in the receiving cavity 121 and extends along the second direction Y. The reinforcing beam 13 is connected to the bottom plate 111 and the side plate 112 of the box body 11 along the first direction X, and together they form a first cavity 1211 extending along the second direction Y.

[0052] In the embodiments of this application, by connecting the side beam 12 to the bottom plate 111 of the box body 11 and the side plate 112 along the first direction X, the side beam 12, the bottom plate 111 of the box body 11 and the side plate 112 along the first direction X form a receiving cavity 121 extending along the second direction Y, so that the side beam 12 can support the side plate 112 of the box body 11 along the first direction X, and the side plate 112 of the box body 11 along the first direction X has strong compressive strength.

[0053] Based on this, by providing a reinforcing beam 13 extending along the second direction Y in the receiving cavity 121, the reinforcing beam 13 is connected to the bottom plate 111 and the side plate 112 of the box body 11 along the first direction X, and encloses to form a first cavity 1211 extending along the second direction Y. The reinforcing beam 13 can further support the side plate 112 of the box body 11 along the first direction X, so that the compressive strength of the side plate 112 of the box body 11 along the first direction X is higher.

[0054] In some embodiments, a second cavity 1212 extending along the second direction Y is formed between the reinforcing beam 13 and the side beam 12. This allows a buffer space to be formed between the reinforcing beam 13 and the side beam 12, which helps to improve the compressive strength of the battery box 10 in the first direction X.

[0055] The reinforcing beam 13 and the side beam 12 are respectively arranged in a plate shape, and at least a portion of the side surface of the reinforcing beam 13 and at least a portion of the side surface of the side beam 12 are arranged relatively spaced apart to form a second cavity 1212 extending along the second direction Y between the reinforcing beam 13 and the side beam 12.

[0056] In some embodiments, at least one reinforcing portion 131 may be provided on the side of the reinforcing beam 13 facing away from the first cavity 1211. The reinforcing portion 131 can improve the strength of the reinforcing beam 13, thereby further improving the supporting strength of the reinforcing beam 13 on the side plate 112, and thus improving the compressive strength of the side plate 112.

[0057] It should be noted that a reinforcing part 131 can be provided on the side of the reinforcing beam 13 opposite to the first cavity 1211, or the number of reinforcing parts 131 can be multiple, with multiple first reinforcing parts 131 spaced apart along the second direction Y. Of course, the latter can further improve the strength of the reinforcing beam 13, thereby improving the compressive strength of the side plate 112 of the box body 11 along the first direction X.

[0058] In this way, a portion of the reinforcing beam 13 can be raised in a direction away from the first cavity 1211 to form a reinforcing part 131, thereby making the processing of the reinforcing beam 13 more convenient, which is conducive to reducing the production cost of the reinforcing beam 13 and improving the production efficiency of the reinforcing beam 13.

[0059] Of course, a protruding structure can also be provided on the side of the reinforcing beam 13 away from the first cavity 1211 to form the reinforcing part 131.

[0060] In some embodiments, such as Figure 3 and Figure 4 As shown, the reinforcing beam 13 can include a first reinforcing plate 1311 and a second reinforcing plate 1312 connected at an included angle. The first reinforcing plate 1311 is connected to the corresponding side plate 112 and is spaced apart from the bottom plate 111. The second reinforcing plate 1312 is connected to the bottom plate 111 and is spaced apart from the corresponding side plate 112. The first reinforcing plate 1311, the second reinforcing plate 1312, the bottom plate 111, and the side plate 112 enclose a first cavity 1211. Thus, the bending structure formed by the connection of the first reinforcing plate 1311 and the second reinforcing plate 1312 can improve the strength of the reinforcing beam 13, thereby improving the supporting strength of the reinforcing beam 13 on the side plate 112.

[0061] In this configuration, at least a portion of the reinforcing part 131 can be located on the side of the first reinforcing plate 1311 away from the first cavity 1211, so as to improve the strength of the first reinforcing plate 1311 and thereby improve the overall strength of the reinforcing beam 13.

[0062] Alternatively, at least part of the reinforcing portion 131 can be located on the side of the second reinforcing plate 1312 away from the first cavity 1211 to improve the strength of the second reinforcing plate 1312, thereby improving the overall strength of the reinforcing beam 13.

[0063] It should be noted that a portion of the reinforcing part 131 can be located on the first reinforcing plate 1311, and another portion of the reinforcing part 131 can be located on the second reinforcing plate 1312. Alternatively, the reinforcing part 131 can be entirely located on the first reinforcing plate 1311, or entirely located on the second reinforcing plate 1312. Of course, the former can further improve the overall strength of the reinforcing beam 13.

[0064] In some embodiments, the reinforcing portion 131 extends from the first reinforcing plate 1311 to the second reinforcing plate 1312, such that a portion of the reinforcing portion 131 is located at the junction of the first reinforcing plate 1311 and the second reinforcing plate 1312, so as to further improve the strength of the reinforcing beam 13.

[0065] In some embodiments, such as Figure 4 As shown, the reinforcing beam 13 may further include a first connecting plate 1313 connected to the first reinforcing plate 1311. The first connecting plate 1313 is disposed opposite to and connected to the corresponding side plate 112, and at least a portion of the reinforcing part 131 protrudes from the side of the first connecting plate 1313 away from the side plate 112. This increases the connection area between the reinforcing beam 13 and the corresponding side plate 112, thereby increasing the connection strength between the reinforcing beam 13 and the corresponding side plate 112. Simultaneously, by having at least a portion of the reinforcing part 131 protrude from the side of the first connecting plate 1313 away from the side plate 112, the strength of the first connecting plate 1313 is increased, resulting in a higher connection strength between the first connecting plate 1313 and the corresponding side plate 112, and consequently, a higher strength for the reinforcing beam 13.

[0066] In some embodiments, such as Figure 4 As shown, the first connecting plate 1313 can include a plurality of connecting segments 1314 connected sequentially along the second direction Y. Each connecting segment 1314 is respectively disposed opposite to a corresponding side plate 112. In a pair of adjacent connecting segments 1314, one segment 1314 is connected to the corresponding side plate 112, while the other segment 1314 is spaced apart from the corresponding side plate 112. Thus, a bending structure can be formed at the connection point of two adjacent connecting segments 1314, which helps to improve the strength of the first connecting plate 1313, thereby improving the overall strength of the reinforcing beam 13, and also improving the connection strength between the first connecting plate 1313 and the corresponding side plate 112.

[0067] The number of reinforcing parts 131 can be multiple. Multiple reinforcing parts 131 are spaced apart along the second direction Y. A portion of each reinforcing part 131 protrudes from a different connecting segment 1314. Thus, the strength of the connecting segment 1314 can be strengthened by the reinforcing parts 131, thereby further improving the overall strength of the first connecting plate 1313 and the reinforcing beam 13.

[0068] Specifically, the number of connecting sections 1314 can be equal to the number of reinforcing parts 131, and they can correspond one-to-one, so as to further improve the overall strength of the first connecting plate 1313 and the reinforcing beam 13.

[0069] In some embodiments, the reinforcing portion 131 extends to one edge of the second reinforcing plate 1312 near the bottom plate 111, thereby increasing the length of the reinforcing portion 131 to improve the overall strength of the second reinforcing plate 1312 and the reinforcing beam 13.

[0070] Specifically, the reinforcing beam 13 also includes a second connecting plate 1315, and the edge of the first reinforcing plate 1311 away from the first reinforcing plate 1311 is connected to the second connecting plate 1315. The second connecting plate 1315 is disposed opposite to and connected to the base plate 111. The reinforcing part 131 extends to the connection between the second reinforcing plate 1312 and the second connecting plate 1315.

[0071] In some embodiments, the surface of the reinforcing part 131 facing away from the first cavity 1211 can be a convex curved surface, so that the surface of the reinforcing part 131 facing away from the first cavity 1211 has a relatively smooth transition, and at the same time, it has a better reinforcing effect on the reinforcing beam 13.

[0072] In some embodiments, the number of side beams 12 can be two, and the two side beams 12 are connected one-to-one with the two side plates 112 on both sides of the box body 11 along the first direction X. Each receiving cavity 121 is provided with a reinforcing beam 13. Thus, the two side beams 12 and the reinforcing beams 13 can support the side plates 112 on both sides of the box body 11 along the first direction X, thereby further improving the compressive strength of the side plates 112 on both sides of the box body 11 along the first direction X.

[0073] In some embodiments, such as Figure 2 and Figure 3 As shown, the battery box 10 may also include a rear beam 14 located in the mounting cavity 1110. The side plate 112 of the box body 11 along the second direction Y is connected to the rear beam 14, and the bottom plate 111 is also connected to the rear beam 14. Thus, the bottom plate 111 of the box body 11 and the side plate 112 of the box body 11 along the second direction Y are supported by the rear beam 14, thereby improving the compressive strength of the side plate 112 and the bottom plate 111 of the box body 11 along the second direction Y.

[0074] The battery box 10 also includes a corner beam 15 located within the mounting cavity 1110. The rear beam 14 is connected to the side beam 12 via the corner beam 15, and the corner beam 15 is connected to the two adjacent side plates 112 and the bottom plate 111. The connection between the rear beam 14 and the side beam 12 via the corner beam 15 enables the rear beam 14 to support the side beam 12, thereby improving the compressive strength of the portion of the side beam 12 near the corner beam 15 in the first direction X.

[0075] Specifically, the corner beam 15 has a plate-like structure. A portion of the corner beam 15 is positioned opposite to and connected to the bottom plate 111 of the box body 11. Another portion of the corner beam 15 is positioned opposite to two adjacent sides of the box body 11 and welded to each other. A portion of the corner beam 15 is stacked with one end of the side beam 12 along the second direction Y and welded to each other, and another portion of the corner beam 15 is stacked with the rear beam 14 and welded to each other.

[0076] There are two side beams 12. The two side beams 12 are distributed on both sides of the mounting cavity 1110 along the first direction X. There are also two corner beams 15. The rear beam 14 extends along the first direction X. The two ends of the rear beam 14 along the first direction X are respectively connected to the two side beams 12 one by one through the corner beams 15.

[0077] In some embodiments, the battery box 10 further includes a crossbeam 17 extending along a first direction X. The crossbeam 17 is located in the mounting cavity 1110. The two ends of the crossbeam 17 are connected one-to-one with the side plates 112 on both sides of the box body 11 along the first direction X, so that the crossbeam 17 supports the side plates 112 on both sides of the box body 11 along the first direction X, thereby improving the compressive strength of the side plates 112 on both sides of the box body 11 along the first direction X.

[0078] The crossbeam 17 and the rear beam 14 can be arranged along the second direction Y. The crossbeam 17 can divide the mounting cavity 1110 into an electrical compartment 1111 and a battery compartment 1112. Multiple batteries of the battery assembly 30 are located in the battery compartment 1112. The electrical components of the battery pack 1 are located in the electrical compartment 1111.

[0079] In some embodiments, at least one end of the crossbeam 17 may be provided with a third connecting plate 171, which is disposed opposite to and connected to the corresponding side plate 112. This allows the third connecting plate 171 and the corresponding side plate 112 to have a higher connection area, thereby improving the connection strength between the crossbeam 17 and the corresponding side plate 112.

[0080] Specifically, the crossbeam 17 may be provided with a third connecting plate 171 at both ends along the first direction X. The two third connecting plates 171 are arranged in a one-to-one correspondence with the two side plates 112 on both sides of the box body 11 along the first direction X, and are connected to each other.

[0081] In some embodiments, the ratio of the height of the third connecting plate 171 to the height of the corresponding side plate 112 can be greater than or equal to 1 / 2 and less than or equal to 2 / 3, thereby further improving the support strength of the crossbeam 17 on at least one side plate 112 of the box body 11 along the first direction X, which is beneficial to improving the compressive strength of the box body 11 in the first direction X.

[0082] The ratio of the height of the third connecting plate 171 to the height of the corresponding side plate 112 can be 0.52, 0.54, 0.58, 0.6, 0.61, 0.63, 0.65, etc., depending on the structure of the crossbeam 17 and the box 11, and is not limited here.

[0083] In some embodiments, such as Figures 5 to 7 As shown, the battery box 10 may also include a mounting assembly 16, which is disposed on one side of the box body 11 along the first direction X. The mounting assembly 16 includes a first mounting plate 161, a second mounting plate 162, and a third mounting plate 163 stacked along the height direction Z of the box body 11. The first mounting plate 161 and the second mounting plate 162 are respectively connected to their corresponding side plates 112, and the third mounting plate 163 is connected to the side of the bottom plate 111 facing away from the mounting cavity 1110. By including the first mounting plate 161, the second mounting plate 162, and the third mounting plate 163 stacked along the height direction Z of the box body 11, the rigidity of the mounting assembly 16 can be significantly improved. Meanwhile, by connecting the first mounting plate 161 and the second mounting plate 162 to their respective side plates 112, the connection area between the mounting assembly 16 and the side plates 112 of the housing 11 can be increased, effectively distributing the force between the mounting assembly 16 and the side plates 112 of the housing 11. Furthermore, by connecting the third mounting plate 163 to the side of the bottom plate 111 facing away from the mounting cavity 1110, the mounting assembly 16 can transfer a portion of the compressive force to the bottom plate 111 of the housing 11, which helps improve the compressive strength of the battery box 10.

[0084] Among them, such as Figure 7 As shown, a portion of the second mount plate 162 can be raised toward the first mount plate 161 or the third mount plate 163 to form a reinforcing protrusion structure 1621. By raising a portion of the second mount plate 162 to form the reinforcing protrusion structure 1621, the strength of the second mount plate 162 can be improved, thereby improving the strength of the mount assembly 16.

[0085] Specifically, a portion of the second mounting plate 162 protrudes toward the third mounting plate 163 to form a reinforcing protrusion structure 1621. The reinforcing protrusion structure 1621 is located at the end of the second mounting plate 162 away from the housing 11.

[0086] This application also provides a battery pack, which includes a battery box. The specific structure of the battery box is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0087] The battery pack 1 may include a battery box 10 and a battery assembly 30. The battery assembly 30 includes multiple batteries and is disposed within the mounting cavity 1110 of the battery box 10. The structures of the battery assembly 30 and the battery box 10 can be referred to the above embodiments, and will not be repeated here.

[0088] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery box, characterized in that, include: The housing includes a bottom plate and a plurality of side plates connected to the bottom plate, the bottom plate and the plurality of side plates forming an installation cavity; A side beam is provided in the mounting cavity. The side beam is connected to the bottom plate and the side plate of the box body along one side of the first direction, and encloses a receiving cavity extending along the second direction. The side plate of the box body along the first direction extends along the second direction. A reinforcing beam is disposed within the receiving cavity and extends along the second direction. The reinforcing beam is connected to the bottom plate and the side plate of the box body along the first direction, and together they enclose a first cavity extending along the second direction.

2. The battery box as described in claim 1, characterized in that, A second cavity extending along the second direction is formed between the reinforcing beam and the side beam.

3. The battery box as described in claim 1, characterized in that, The reinforcing beam has at least one reinforcing part protruding from the side opposite to the first cavity.

4. The battery box as described in claim 3, characterized in that, The reinforcing beam includes a first reinforcing plate and a second reinforcing plate connected at an angle. The first reinforcing plate is connected to the corresponding side plate and is spaced apart from the bottom plate. The second reinforcing plate is connected to the bottom plate and is spaced apart from the corresponding side plate. The first reinforcing plate, the second reinforcing plate, the bottom plate, and the side plate together form the first cavity.

5. The battery box as described in claim 4, characterized in that, At least a portion of the reinforcing portion is located on the side of the first reinforcing plate opposite to the first cavity; and / or, At least a portion of the reinforcing portion is located on the side of the second reinforcing plate opposite to the first cavity.

6. The battery box as described in claim 5, characterized in that, The reinforcing portion extends from the first reinforcing plate to the second reinforcing plate.

7. The battery box as described in claim 5, characterized in that, The reinforcing beam also includes a first connecting plate connected to the first reinforcing plate. The first connecting plate is disposed opposite to and connected to the corresponding side plate. At least a portion of the reinforcing part protrudes from the side of the first connecting plate away from the side plate.

8. The battery box as described in claim 7, characterized in that, The first connecting plate includes a plurality of connecting segments connected sequentially along the second direction. The plurality of connecting segments are respectively disposed opposite to the corresponding side plate. One of two adjacent connecting segments is connected to the corresponding side plate, and the other connecting segment is spaced apart from the corresponding side plate.

9. The battery box as described in claim 8, characterized in that, The number of the reinforcing parts is multiple; the multiple reinforcing parts are spaced apart along the second direction; a portion of each reinforcing part protrudes from a different connecting segment.

10. The battery box as described in claim 5, characterized in that, The reinforcing portion extends to the edge of the second reinforcing plate near the bottom plate.

11. The battery box as described in claim 4, characterized in that, The surface of the reinforcing part opposite to the first cavity is a convex curved surface.

12. The battery box as described in claim 4, characterized in that, A portion of the reinforcing beam bulges outward from the first cavity to form the reinforcing section.

13. The battery box as described in any one of claims 1 to 12, characterized in that, The number of side beams is two, and the two side beams are connected one-to-one with the two side plates on both sides of the box body along the first direction. Each of the accommodating cavities is provided with a reinforcing beam.

14. The battery box as described in any one of claims 1 to 12, characterized in that, The battery box also includes a rear beam located within the mounting cavity, the side plate of the box body along the second direction is connected to the rear beam, and the bottom plate is connected to the rear beam; The battery box also includes a corner beam located in the mounting cavity. The rear beam is connected to the side beam through the corner beam, and the corner beam is connected to the two adjacent side plates and the bottom plate.

15. The battery box as described in any one of claims 1 to 12, characterized in that, The battery box also includes a crossbeam extending along the first direction. The crossbeam is located inside the mounting cavity. Both ends of the crossbeam are connected to the side plates on both sides of the box body along the first direction. At least one end of the crossbeam is provided with a third connecting plate. The third connecting plate is disposed opposite to the corresponding side plate and connected to it.

16. The battery box as described in claim 15, characterized in that, The ratio of the height of the third connecting plate to the height of the corresponding side plate is greater than or equal to 1 / 2 and less than or equal to 2 / 3.

17. The battery box as described in any one of claims 1 to 12, characterized in that, The battery box further includes a mounting assembly, which is disposed on one side of the box body along the first direction. The mounting assembly includes a first mounting plate, a second mounting plate, and a third mounting plate stacked along the height direction of the box body. The first mounting plate and the second mounting plate are respectively connected to the corresponding side plates, and the third mounting plate is connected to the side of the bottom plate opposite to the mounting cavity.

18. The battery box as claimed in claim 17, characterized in that, A portion of the second mounting plate protrudes toward the first mounting plate or the third mounting plate to form a reinforcing protrusion structure.

19. A battery pack, characterized in that, include: A battery box, wherein the battery box is the battery box according to any one of claims 1 to 18; A battery assembly, comprising multiple batteries, is disposed within the mounting cavity of the battery box.

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